WO2001057440A1

WO2001057440A1 - Liquid fuel combustion device

Info

Publication number: WO2001057440A1
Application number: PCT/JP2001/000657
Authority: WO
Inventors: Toshio Mamiya; Hikoya Ishii; Toyokazu Shirouchi; Hiroshi Kitagaito; Masahiko Goto; Yasuaki Kuwahara; Mamoru Morikawa
Original assignee: Sharp Kabushiki Kaisha
Priority date: 2000-01-31
Filing date: 2001-01-31
Publication date: 2001-08-09
Also published as: EP1258679A1; CN1396999A; CN100394106C; EP1258679A4; KR20020069029A; KR100546545B1; CN1217129C; KR20050088256A; CN1546906A; KR100588037B1

Abstract

A liquid fuel combustion device in which an oil feed tank (6) having in its upper region an oil feed port (28) and an oil feed cap (22) therefor is removably received in the tank receiving chamber (500) of a device main body (1), wherein there is installed an oil feed port release preventing means which prevents the release of the closing member in the mounted state of the main body of the oil feed tank. The oil feed port release preventing means is formed such that portions of the upper surface of the oil feed tank and its lateral surface are formed as an inclined surface (501), with the oil feed port formed in this inclined surface; in the mounted state of the main body, release of the oil feed cap is prevented by the wall surface of the tank receiving chamber.

Description

Liquid fuel combustion device

Technical field

The present invention relates to a liquid fuel combustion device such as a petroleum fan heater. Light

Background art

Rice field

Fig. 84 is a partially omitted front cross-sectional view schematically showing an example of a conventional oil fan, Fig. 85 is a side cross-sectional view, and Fig. 86 shows a refueling cap and a receiving device for a refueling tank. It is sectional drawing.

As shown in Fig. 84, the conventional oil fan heater is provided with a fuel tank P2 for injecting and storing a liquid fuel P4 such as kerosene in advance inside the main body P1. A sufficient amount of liquid fuel P4 is supplied to a fuel tank P3 connected below the refueling tank P2.

The liquid fuel P 4 stored in the fuel tank P 3 is guided to the carburetor P 7 by the fuel pump electromagnetic pump P 5 via the oil supply pipe P 6. Here, the sent liquid fuel P4 is vaporized by the vaporizer heater (not shown) provided in the vaporizer P7. P9 is a combustion chamber, on the bottom of which a burner P8 is fixedly supported.

The fuel vaporized by the vaporizer P7 is vigorously injected from the nozzle, is introduced into the parner P8 together with fuel air, is burned at the flame port P8a, and the air in the combustion chamber P9 is heated. As shown by the arrow in Fig. 85, the air fan P11 attached to the fan motor P10 consisting of a single-phase induction motor and the like provided on the back of the The air in the room sucked in through 12 is blown into the room from outlet P13 as warm air together with the heated air and combustion gas in combustion chamber P9. On the other hand, the flame sensor P 14 provided slightly above the flame port P 8 a When a flame current of a preset value or more is detected, the fan motor P10 is energized, and the blower fan P11 is rotated to convert the air drawn from the room into warm air. It is blown into the room from the outlet P13.

At this time, the room temperature is detected by the room temperature summary P15, and a control device (not shown) controls the drive of the fuel pump electromagnetic pump P5 based on the temperature difference between the room temperature and the set temperature. The amount of liquid fuel P 4 supplied to the carburetor P 7 is adjusted to adjust the heating power of the fuel flame in the Pana P 8.

Therefore, for example, if the operation of the petroleum fan is started when the room temperature is low, the supply amount of the liquid fuel P 4 to the vaporizer P 7 is increased to rapidly raise the room temperature to the set temperature. Adjust the supply of 4 to keep it constant near the set temperature.

To refuel the fuel tank P2, remove the fuel tank P2 from the main body P1, turn it upside down, remove the fuel cap P16 with the valve part of the fuel tank P2, Inject fuel from P 17 (Fig. 86). After confirming that the fuel has been supplied to the refueling tank P2, tighten the refueling cap: P16 on the threaded part of the base P17, and turn it over so that the refueling cap P16 is down. The fuel supply cap P16 is inserted into the receiver P18 attached to the upper surface of the fuel tank P3, and placed on the fuel tank P3.

By the way, in the conventional oil fan day, it is necessary to remove the fuel tank from the main body to refuel the fuel tank, turn the fuel tank upside down to turn the fuel cap up, and after fuel supply, tighten the fuel cap. Since it is inserted into the main unit, it is necessary to turn the fuel tank upside down again, which is cumbersome to handle.

In addition, the refueling cap is tightened with the base and screws, and there was a problem that the refueling cap was detached and the fuel leaked when the refueling cup was turned over due to insufficient refueling cap tightening. . In particular, in the elderly society, there is a need for improvement, as the gripping force reduces the screw tightening force. When supplying fuel to the fuel tank, the oil level rises up to the valve of the filler cap. As the fuel is supplied inside the refueling tank while maintaining a constant oil level by replacing the air, the valve of the refueling port cap is always wet with fuel, and refueling is performed when refueling the refueling tank. When the cap was removed, fuel adhered to the hand and slipped when the screw was tightened, and at the same time, the hand became difficult or dirty. In addition, when refueling with the refueling tank stored in the oil fan heater body, there was a problem that fuel spilled into the oil fan heater body.

In view of the above, the present invention can replenish the fuel tank without reversing the fuel tank in the vertical direction when refueling the fuel tank, without depositing the fuel on the hands and keeping the fuel tank clean. It is an object of the present invention to provide a liquid fuel combustion device having a fuel tank in which fuel can not be supplied to the fuel tank when the fuel tank is stored in the fuel tank. Disclosure of the invention

The present invention is directed to a liquid fuel combustion apparatus in which a fuel tank having an oil filler port and a closing means at an upper portion is detachably housed in a tank accommodating chamber of the apparatus main body. A refueling port release preventing means is provided to prevent refueling, so that refueling cannot be performed unless the refueling tank is removed from the main unit.

In this case, a fuel tank is provided below the fuel tank and the fuel is supplied to the combustion section through the fuel tank, as long as the filler port of the fuel tank is located at the top when the main unit is mounted. Alternatively, it can be applied to any of the direct refueling systems in which fuel is supplied from the refueling nozzle to the combustion section directly, but it is preferable to employ the direct combustion system.

Various modes can be adopted as the filler opening prevention means. As the first blocking means, the upper surface and a part of the side surface of the fuel tank are inclined surfaces, and the oil supply port is arranged on the inclined surface. In other words, the space between the inclined surface and the wall surface of the tank chamber A configuration that has a size that does not lead to release is exemplified.

This inclined surface was formed not only at the inclined surface formed over the upper surface of the fuel tank and a part of one side surface, but also at a predetermined angle between the upper surface of the oil tank and two side surfaces adjacent to the upper surface. It may be an inclined surface.

The second filler opening prevention means is such that the filler opening is disposed above the side of the tank, and the opening of the closing means is prevented by the side wall of the tank and the wall surface of the tank chamber when the filler tank is mounted. That is, for example, a configuration in which the space sandwiched between the tank side surface and the wall surface of the tank storage chamber has a size that does not allow the closing means to be released from the oil supply port can be exemplified. As the third filler opening prevention means, a configuration in which a filler port is arranged on the upper surface of the tank and a regulating member that regulates the release of the closing means when the main body of the tank is mounted can be exemplified. This restricting member may be installed on either the tank side or the wall surface of the tank storage chamber, but it is preferable that the restricting member cannot be manually released when the fuel tank is mounted on the main body. For example, there is a mode in which the regulating member restrains the closing means by a solenoid or the like when the main body of the refueling tank is detected. In the case of a method in which the closing means is pivotally opened with respect to the oil supply port, the rotation fulcrum of the closing means is disposed on the wall surface side of the tank housing chamber, and the regulating member is disposed on the outer end side further than that. The wall of the evening storage chamber is retracted to the side to form a step facing the regulating member, and when the closing means is to be rotated and opened when the main body is mounted, the regulating member abuts the step. The opening may be prevented.

In addition, as the closing means, a configuration using a cap screwed to the base of the filler port, as described above, a fixed plate integrated with the filler port, and supported by the fixed plate so as to be rotatable and openable. A movable plate, a lid member provided with a packing provided in the movable plate to close a fuel supply port, and a locking means for holding the movable plate in a refueling closed position.

A locking lever provided with a locking portion rotatably supported on one of the movable plate and the fixed plate, the locking means being disposed on an open end opposite to the rotation fulcrum of the movable plate; The movable plate and the fixed plate are provided on the other of the movable plate and the fixed plate so as to hold the movable plate in the closed position by engaging with the stop portion. A configuration including a lock receiving portion and a lever panel for urging the locking lever in a direction in which the locking portion engages with the lock receiving portion can be exemplified.

When the locking means is disposed on the wall side of the evening storage chamber, as a means for preventing the opening of the fuel supply port, a part of the locking lever is extended, and when the fuel tank is mounted on the main body, this extension is performed. A configuration in which the rotation of the locking lever is prevented from being released by the contact between the portion and the wall surface of the tank storage chamber can be exemplified.

The above-mentioned filler opening prevention means may be configured singly or in combination. For example, the structure of the inclined surface, which is the first blocking means, and the structure of the extending portion or the regulating member of the rotary closing means provided with the locking means are organically combined to reliably release the blocking means. It is possible to block.

The fuel tank having the above configuration may be provided with a means for detecting that the fuel tank is mounted on the apparatus main body, and a configuration for confirming the means may be added.

Also, a means for detecting the liquid level of the fuel in the tank below the refueling tank and detecting the liquid level of the fuel can be added. In this case, the liquid level detecting means may be configured such that when a drain hole is formed on the bottom surface of the fuel tank, the drain hole is disposed on a lid member that opens and closes the drain hole, and that the fuel in the fuel tank is sucked up. Any of the arrangements located below the tube can be employed.

In order to achieve the above object, a liquid fuel combustion device according to the present invention includes a refueling tank detachably mounted in a main body, a vaporizing section for heating and vaporizing the fuel, and a parner for burning the vaporized fuel. Equipped with a combustion section, an oil pump for feeding fuel from the fuel tank to the vaporizing section, and a connecting means for connecting the oil tank to an oil supply path to the combustion section when the fuel tank is mounted on the main body. Abolition of the fuel tank that temporarily stores fuel under the tank is abolished, and fuel in the fuel tank is sent directly to the combustion section, so that fuel can be replenished without reversing when refueling the fuel tank. That's how it was done.

In the liquid fuel combustion device with the above configuration, the fuel tank for storing fuel is eliminated, It is desirable to provide an air hole that opens to prevent negative pressure inside the refueling tank because the fuel from the refueling tank is directly sent to the combustion section. However, the fuel may scatter outside the tank when carrying during refueling, or the fuel may leak when the refueling tank falls.

Therefore, in the present invention, an air hole closing means is provided in an air hole opened so as to prevent the inside of the refueling tank from being under negative pressure, to prevent fuel from scattering when the tank is carried or fuel from leaking when the tank falls. It is a thing.

As a first means of closing the air hole, a communication is made such that the inside of the air hole is surrounded by a fuel splash prevention plate, and the inside of the tank and the air hole communicate with the splash prevention plate at a position deviated from a position immediately below the air hole. An example is a configuration in which a hole is formed to make it difficult for the fuel in the tank to scatter from the air hole when being carried. In this case, if the bottom surface of the shatterproof plate is inclined and a communication hole is formed at the deepest position of the inclined surface, and an air hole is formed immediately above the shallowest position, the positions of both holes will be significantly shifted, and fuel This is suitable in that the scattering prevention effect is increased. In addition, as a second means for closing the air hole, a guide disposed on the inner surface side of the air hole, a weight which is vertically movable inside the guide, and an intervening space between the weight and the air hole And a closing plate that closes the air hole following the vertical movement of the weight. According to this configuration, when the tank falls, there is an advantage that the weight moves in the vertical direction and the air hole can be reliably closed by the closing plate.

In this case, if the corner of the closing plate on the contact side with the guide is formed as an R surface so that the closing plate can be moved and guided reliably, the movement becomes smooth on the R surface of the closing plate. In addition, if the bottom of the guide in the weight is tapered, and the weight moves up and down by rolling on the taper surface, a compact structure is achieved, and the impact noise caused by the vertical movement of the weight is obtained. Can also be reduced.

The air hole closing means using the above-mentioned weight is a mechanism in which the air hole is opened when the oil tank is taken out of the main unit (when carrying it), but as a third air hole closing means, A valve that closes the air hole, and this valve is mounted and swings up and down outside the tank A tank valve lever that moves the tank valve lever up and down, and the movable rod is pushed up by a member on the main body side when the main body of the refueling ink tank is mounted, thereby moving the tank valve lever upward. If the oil tank is swung toward the valve opening side and the tank valve lever is swung in the valve closing direction by its own weight or forced movement by a spring when the oil tank is removed from the main body, the air hole can be Can be closed when the main body is removed, and opened when the main body is mounted.

In this case, if the air hole closing means is made to function faster than the connection means of the oil supply path when the main body of the fuel tank is installed, the open air holes allow the air hole inside the fuel tank to be connected before the connection means is connected. Abnormal pressure can be released, and the flow of fuel becomes smooth. When the refueling tank is taken out of the main unit, the air hole in the tank is closed, so that fuel does not leak even if the tank falls.

The configuration in which the air hole closing means functions faster than the connection means of the oil supply path is as follows: When the main body of the oil supply nozzle is attached, the movable rod is connected to the member on the main body side earlier than the connection of the connection joint on the oil supply link. What is necessary is just to set so that it may contact. As an example, a movable rod is installed inside a vertical hole formed in the connection joint on the refueling tank side so as to be able to move up and down, and the lower end is protruded below the connection joint, so that when the fuel tank is attached to the main body, A configuration in which the movable rod is brought into contact with the receiving surface of the joint receiving portion on the combustion section side to move the movable rod up and down faster than the connection of the oil supply path can be exemplified. In this case, since a part of the air hole closing means (movable rod) is arranged at the connection joint on the fuel tank side, the structure becomes compact.

In addition, since the filler port of the fuel tank is always facing upward, if a filter is installed at the filler port to remove dust and the like in fuel, dust and dirt inside the fuel tank when refueling is provided. Dust does not enter.

In this case, if the filter is formed in a cylindrical shape and the mesh portion through which the fuel passes is provided up to the vicinity of the filler port, the fuel passage area increases, and the injection pump can be prevented from malfunctioning. Also, if a convex part is provided upward on the bottom part of the filter, it can be inserted into this filter. There is a gap between the tip of the injection pump and the bottom of the filter, and fuel can be supplied smoothly.

In addition, if the hose guide for the injection pump is provided on the inner surface of the cylindrical filter, the hose of the injection pump will be harder to pull out than the filter, and the hose of the injection pump will come off from the refueling nozzle when refueling, and the fuel will be sprayed. No more scattering.

In addition, in the mesh part on the side of the filter, the mesh part that allows water to pass through is placed in the upper part, and the mesh part that does not allow water to pass is placed in the lower part. When the fuel is supplied to the refueling tank, the water does not enter the tank directly but accumulates in the filling tank and the post-treatment of water can be easily performed. .

In the above liquid fuel combustion device, a configuration is also adopted in which a return oil path for returning fuel from the combustion section to the fuel tank is provided, and a connection means on the return oil side for connecting a refueling tank to the return oil path is adopted. However, in such a liquid fuel combustion apparatus, a part of the pipe connecting the combustion section and the return oil side connection means is arranged substantially in the horizontal direction, and the substantially horizontal section temporarily holds the fuel. It is characterized by functioning as a retaining section.

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention eliminates a fuel tank for temporarily storing fuel, and directly feeds fuel in a fuel tank to a combustion unit. In addition to preventing wetting by fuel, various functions required as fuel tanks were abolished were added to refueling tanks.

In other words, a fuel amount detection means for detecting the amount of fuel in the refueling tank in order to quickly detect a shortage of fuel in the refueling tank, and a water detecting means for detecting water generated in the refueling tank are provided. A configuration that eliminates problems caused by water in the refueling ink tank being supplied to the combustion section, and a tank mounting detection unit that detects whether the refueling ink tank is mounted or not, operates if the tank is not mounted. The system has been adopted so that it cannot be started. In this case, the fuel amount detecting means, the water detecting means, and the tank mounting detecting means may be provided at any place of the tank. The configuration provided on the bottom surface side of is preferred.

The fuel amount detection means includes, for example, a float with a magnet disposed inside the tank, and a lead switch installed on the tank mounting table side so as to be turned ON / OFF in accordance with the approach / separation operation of the magnet. The configuration can be exemplified.

As the water detecting means, a conductive water tray provided on the bottom of the conductive tank for storing dewed water, an electrode in contact with the water tray, an electrode in contact with the oil supply tank, a water tray, An example is provided in which an insulator that electrically insulates the refueling tank is provided, and water is detected based on a difference in electric resistance between the water stored in the water receiving tray and the fuel.

In order to accurately detect water, the water receiving tray is preferably formed separately from the tank, and is preferably mounted on a mounting hole on the bottom surface of the tank via an electrical insulator. Although the material is made of a conductive material, the use of a stainless steel plate is preferable in that cracking can be prevented.

An example of the electrical insulator is a non-conductive packing having an elastic force interposed between a peripheral wall of a hole formed on the bottom surface of the tank and a periphery of the water receiving tray. If this packing is subjected to a water-repellent treatment, it is difficult for water to collect even after draining, and malfunction can be prevented.

A configuration in which the electrodes that come into contact with the water receiving tray and the tank, respectively, are installed on, for example, a tank mounting table outside the tank, and the water receiving tray and the tank are brought into contact with the respective electrodes is also preferable from the viewpoint of electrode arrangement. In this case, the position where the water tray and the tank come closest to each other functions as the tip electrode, and water is detected based on the difference in the resistance value of the water or fuel stored between them. In addition, by applying a non-conductive paint to a part of the water tray, water can be detected with higher accuracy. In addition, if a guard is provided to guard the water pan on the tank side where the water pan is installed, the water can be removed when the tank is removed from the main unit and refueled. Scratches and dents on the tray can be prevented. The tank mounting detection means can be exemplified by a configuration including a microswitch installed on the upper surface of the tank mounting table, a magnet installed on the bottom of the evening table, and a lead switch on the evening table.

When the liquid fuel combustion device is controlled by input signals from these fuel amount detection means, ZK detection means, and tank mounting detection means, the control unit stops operation when the tank mounting detection means is OFF (no tank) Control to drive the operation mode of baking the vaporizer when it is ON. In addition, when the tank mounting detecting means is ON and the fuel amount detecting means for detecting the fuel amount is OFF (fuel is present), it is possible to determine that operation can be started and control to start operation. it can. Further, when the tank mounting detection means is in the ON state (tank mounting state) and the fuel amount detecting means for detecting the fuel amount is in the ON state (no fuel), it is possible to control the operation to stop, or It is also possible to perform control to notify the display unit of refueling when the detection means is ON. Further, in order to solve the above-mentioned problem, the present invention eliminates the fuel tank for temporarily storing fuel, and feeds the fuel in the fuel tank directly to the combustion unit, so that the fuel filler cap of the fuel tank is Combustion control in order to minimize the possibility that water that may accumulate in the refueling tank due to the abolition of the fuel tank will be sent to the combustion section and affect the combustion section as much as possible. The circuit controls the combustion in response to a signal from the water detection means.

That is, the present invention provides a combustion unit that burns fuel supplied from a fuel tank, a flame detection unit that detects a state of a flame in the combustion unit by a flame current value, and a value detected by the flame detection unit. A combustion control circuit for controlling the combustion section; and a water detection means for detecting water in the fuel tank.The combustion control circuit includes a water detection signal from the water detection means as well as a signal from the flame detection means. In response to this, the combustion section is controlled to prevent water accumulated in the refueling tank from being sent to the combustion section. This water detection means includes a first electrode provided in the fuel tank and the outside of the fuel tank. It is preferable that water is detected by utilizing the difference in electric resistance between water and fuel by supplying electricity between the provided second electrode.

(7) The detection may be always read by the combustion control circuit.However, if water detection is always performed, as described above, a small current flows between the electrodes and detection is performed. Malfunctions such as the occurrence of cracks occur. Therefore, it is desirable to perform zK detection at a predetermined time.

In addition, the water detection means and the water detection means both energize the electrodes and read the current value. Since the two detection means serve as a common electrode (earth electrode), they may interfere with each other. If both are operated at the same time, accurate detection may not be possible. Therefore, if only one of the flame detecting means and the water detecting means is operated, the detection accuracy can be improved. In this case, priority should be given to the detection of the combustion state from the viewpoint of the combustion function. Therefore, it is preferable to read the current value by giving priority to the operation of the flame detecting means among the flame detecting means and the water detecting means.

Further, in order to prevent the tank from being touched, it is preferable that the water detection is performed only when the combustion is in a predetermined state. That is, the combustion control circuit urges the water detection means to energize only when the combustion state is a predetermined state, receives a signal from the water detection means, and otherwise, the combustion detection circuit detects the combustion state at the flame current value from the flame detection means. A configuration that gives priority to determination is preferable.

Here, the predetermined state is valid during a stop of operation, a predetermined time immediately after the start of operation, and a predetermined period during combustion. During operation stop, no flame is detected from the combustion part, and a predetermined time immediately after the start of operation is a period for preheating the carburetor, and no flame is detected from the combustion part. Further, during combustion, if only a predetermined period (relatively short time) is performed during the period in which combustion is stable, both detection means can be effectively operated.

In addition, during the water detection period, water was discharged from the tank even while operation was stopped. Later, immediately after mounting the tank on the main body, malfunction may occur due to the presence of remaining water. Immediately after refueling, the outer wall of the tank may be condensed by low-temperature fuel. Therefore, it is desirable to perform water detection while avoiding these periods. In other words, a tank mounting detection means is provided to detect the presence or absence of the main body of the refueling tank.The combustion control circuit receives a signal from the water detection means for a certain period of time after receiving the tank mounting signal from the tank mounting detection means. If it is not accepted, malfunction of water detection can be prevented.

A micro switch installed on the upper surface of the tank mounting table can be exemplified as the ink attachment detecting means, but a reset switch or the like may also be used.

Further, as the processing in the combustion control circuit based on the water detection information, it is possible to output a combustion stop signal to the combustion section, or to notify the Z or display section. In addition, it is possible to control to keep the combustion as it is even if the water detection is reported to the front of the table, stop the combustion when the flame falls to a certain level, and prevent malfunction of the water detection.

In other words, when the combustion control circuit receives a water detection signal from the water detection means during combustion, it reads the flame current value from the flame detection means, and if the flame detection level is larger than the preset flame level, It is also possible to adopt a control that continues combustion and stops combustion only when the flame detection level is lower than the set level.

The water detecting means includes a conductive water tray provided on the bottom of the conductive oil tank for storing water, a first electrode in contact with the oil tank, and a second electrode in contact with the water tank. An electrode and an insulator that electrically insulates the water pan and the oil supply tank are provided, and when electricity is supplied between the two electrodes, water is generated due to the difference in electric resistance between the water stored in the water pan and the fuel. Can be exemplified. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front partial cross-sectional view of a petroleum funnel according to Example 1 of the first embodiment of the present invention, FIG. 2 is a schematic diagram of the liquid fuel combustion device, similarly.

Fig. 3 is a schematic diagram of the refueling tank,

Fig. 4 (a) is a view showing a state in which the fuel tank is attached to the main body of the fuel tank, and (b) is a view showing a state in which the fuel cap is not released.

Fig. 5 is a structural diagram of the refueling joint.

Fig. 6 is a structural diagram of the lubricating joint and the suction pipe in the lubricating tank. Fig. 7 is a structural diagram of the lubricating cap with a pressure valve of the lubricating tank.

FIG. 8 is a structural diagram of a lubricating joint receiver.

Fig. 9 is a structural drawing of the wrench and the carburetor,

FIG. 10 is a structural diagram of a heat pump,

FIG. 11 is a structural diagram of the cooling fin,

Fig. 12 is a state diagram of the connection part of the oil tank,

FIG. 13 is a schematic diagram of a fuel tank according to Example 2 of the first embodiment of the present invention,

FIG. 14 is a schematic diagram of a fuel tank according to Example 3 of the first embodiment of the present invention,

Fig. 15 is a view of the state where the refueling tank is attached to the main body.

FIG. 16 is a perspective view of a fuel tank according to Example 4 of the first embodiment of the present invention,

FIG. 17 is a cross-sectional view of the fuel supply port when the fuel tank is attached to the main body. FIG. 18 is a cross-sectional view of the fuel port when the fuel tank is taken out of the main body. A cross-sectional view of a fuel filler port showing Example 5 of the first embodiment of the present invention 0,

FIG. 20 is a cross-sectional view of a fuel filler portion showing Example 6 of the first embodiment of the present invention,

FIG. 21 is a partial front view of an oil fan heater according to a second embodiment of the present invention. FIG.

FIG. 22 is a block diagram of the same liquid fuel combustion device.

Fig. 23 is also a schematic diagram of the refueling tank,

FIG. 24 is a perspective view of a connection portion of the fuel tank.

Fig. 25 is a structural sectional view of the oil feed joint,

Fig. 26 is a structural sectional view of the return oil joint.

FIG. 27 is a structural sectional view of the oil-supply-side connecting means,

Fig. 28 is a cross-sectional view of the structure of the oil feed joint receiving part.

FIG. 29 is a structural sectional view of the return oil side connection means,

FIG. 30 is a side view of the refueling evening tank,

FIG. 31 is a cross-sectional view showing the relationship between the refueling tank and the mounting table,

Fig. 32 is a sectional view of the bottom of the oil tank,

Fig. 33 is a perspective view of the water receiving tray mounting hole of the oil tank as viewed from the inside of the tank.

Fig. 34 shows the structure of the wrench and the carburetor.

Fig. 35 shows the structure of the storage container,

Fig. 36 shows the structure of the cooling fin

FIG. 37 is a control circuit diagram of the same liquid fuel combustion device.

FIG. 38 is also the analog electric circuit diagram,

FIG. 39 is a perspective view of a main body of an oil fan heater according to a third embodiment of the present invention,

FIG. 40 is a rear perspective view of the oil fan heater of FIG. 39;

FIG. 41 is a schematic configuration diagram of the liquid fuel combustion device of FIG.

FIG. 42 is a front view of the main body of FIG. 39, in which a part of the front plate is reinforced, and FIG. 43 is a view of the combustion part and the porcelain part of FIG. FIG.

FIG. 44 is a schematic diagram of the vaporizer of FIG. 43; FIG. 45 is a side sectional view of the combustion section of the main body of FIG. 39,

FIG. 46 is a front view of the combustion section of the main body of FIG. 39,

FIG. 47 is a top view of the main body of FIG. 39 on the tank side.

FIG. 48 is a schematic diagram of the fuel tank of FIG. 39,

FIG. 49 is a schematic view of a connection joint portion of the fuel tank of FIG. 48, and FIG. 50 is a schematic sectional view showing Embodiment 3 of the air hole closing means of FIG. Fig. 51 is a schematic cross-sectional view of the air hole closing means when the oil tank is attached to the main body.

FIG. 52 is a schematic sectional view showing Example 4 of the air hole closing means in the figure, and FIG. 53 is a schematic sectional view of the air hole closing means when the oil tank is mounted on the main body. ,

FIG. 54 is a schematic sectional view showing Example 1 of the air hole closing means of FIG. 42, and FIG. 55 is a schematic sectional view showing Example 2 of the air hole closing means of FIG. FIG. 56 is a cross-sectional view showing the oil-feed side joint in the connection joint portion of FIG. 49.

57 (a) is an exploded perspective view showing a suction pipe connection state of the oil supply side joint, (b) is a cross-sectional view taken along line A--A of (a),

FIG. 58 is a cross-sectional view showing the return oil side joint in the connection joint part of FIG. 49.

FIG. 59 is an exploded perspective view showing a return pipe connection state of the return oil side joint,

(b) is a BB sectional view of (a),

FIG. 60 is a schematic view of the water detecting means and the fuel amount detecting means of the fuel tank of FIG. 48,

FIG. 61 is a schematic view of the fuel supply port closing means of the fuel tank of FIG. 48, and FIG. 62 is a side view of a part of the locking lever of FIG.

Fig. 63 shows the connection joint receiving part on the combustion part side in Fig. 48 and the electromagnetic pump related parts. It is a schematic front view,

FIG. 64 is a schematic top view of a connection joint receiving portion on the combustion section side of FIG. 48 and an electromagnetic pump.

Fig. 65 is a schematic diagram of the connection joint receiving portion and the piping of Fig. 63, and Fig. 66 is a schematic diagram of the oil supply side joint receiving portion and the air valve in the connection joint receiving portion of Fig. 63. And

FIG. 67 is a schematic view of a return oil side joint receiver at the connection joint receiver of FIG. 63,

68 (a) is a rear view of the air valve of FIG. 66, (b) is a schematic sectional view of the air valve and the joint receiving portion,

Fig. 69 is a schematic diagram of the detection table on the refueling tank side in Fig. 42,

FIG. 70 is a schematic related diagram of the tank mounting detecting means on the refueling tank side in FIG. 42,

Fig. 71 (a) is a perspective view of the electrode lever on the water receiving tray side of the detection table shown in Fig. 69, (b) is a mounting state diagram thereof,

FIG. 72 is a diagram showing the mounting state of the tank-side electrode lever of the detection table in FIG. 69, and FIG. 73 is a schematic diagram of the tank mounting detection means in FIG. 70;

FIG. 74 is a combustion control block diagram of FIG. 42,

Fig. 75 is a schematic diagram of the oil-feed side joint and the joint receiver when the tank is inserted in Fig. 42,

Fig. 76 is a schematic diagram of the oil-feed side joint and the joint receiver when the tank of Fig. 42 is installed.

Fig. 77 is a schematic diagram of the return oil side joint and its joint receiver when the tank is inserted in Fig. 42,

Fig. 78 is a schematic diagram of the return oil side joint and its joint when the tank of Fig. 42 is mounted, Fig. 79 is a schematic cross-sectional view of a refueling port with a filter in the refueling tank of Fig. 42;

80 (a) is a plan view of the filter of FIG. 79, and (b) is a front view of the same,

Fig. 81 is a schematic diagram of the upper part of the filter body,

FIG. 82 is a schematic sectional view showing Example 2 of Phil Yuichi,

FIG. 83 is a schematic sectional view showing Example 3 of the filter.

FIG. 84 is a partially omitted front sectional view of a conventional oil fan heater.

Fig. 85 is a schematic side sectional view of the oil fan heater.

FIG. 86 is a cross-sectional view of a main part of the fuel tank and the receiver. BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment]

(Example 1)

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view of an oil fan heater equipped with a liquid fuel combustion device according to the present invention, and FIG. 2 is a schematic diagram of a liquid fuel combustion device. .

The oil fan heater 1 has a detachable front plate 2, a top plate 3 formed integrally with the side, an operation unit 4 for operating the operation, and an outlet 5 for blowing hot air. An openable / closable lid 7 for opening / closing a fuel tank 6 is provided on the right side of the upper surface of the top plate 3 and is mounted and fixed on a mounting table 8 which receives liquid fuel in the event of leakage. As shown in Fig. 1 or Fig. 2, inside the main body 1, a fuel tank 6 for temporarily storing and removing fuel, and a valve for opening and closing a pipe and a passage for sucking up fuel from the fuel tank 6 are provided. Refueling joint 9 as a connecting means incorporating a refueling joint 9, refueling joint receiver 10 for receiving the valve of refueling joint 9, tank guide 11 on which refueling joint receiver 10 is attached, and fuel from refueling tank 6 Carburetor 1 2 and refueling tank 6 An electromagnetic pump 13 for sending fuel to the radiator 1 2, a burner 14 for mixing and burning the fuel and the primary combustion air from the carburetor 12, and a burner 14 for burning The combustion chamber 15 surrounding the combustion chamber 15, the partition plate 16 separating the burner 14 and the combustion chamber 15, the burner box 17 accommodating the burner 14, and the fuel from the carburetor 12 Heat pipe 18 (Fig. 2) for storing fuel, cooling fins 19 for cooling the fuel between the carburetor 12 and the heat pipe 18, fuel for the refueling joint receiver 10 and the electromagnetic pump 13 An air valve 20 for sending air to be shut off is provided.

As shown in FIG. 3, the refueling tank 6 is removably accommodated in a tank accommodating chamber 500 defined by a side wall of the main body and a tank guide 11 (FIG. 1). Handle attached to the top of a vertical rectangular parallelepiped tank body for carrying the tank, and an oil gauge placed on the surface close to the filler port to visually check the state of fuel supply 2 3, a refueling joint 9 installed on the upper surface where a handle 21 is provided for removing fuel from the refueling tank 6, and an inclined surface 5 0 1 ( A fuel supply port 28 for refueling, which is arranged in FIG. 4 (b)), and a fuel cap 22 with a pressure valve with a pressure relief valve mechanism for opening and closing the fuel supply port 28 are provided.

The refueling joint 9 is a connection means for connecting the refueling tank 6 to the oil supply path of the main body 1 when the refueling tank 6 is inserted into the ink tank 500 of the main body 1, and is a spindle-type valve for shutting off fuel. It comprises a mechanism 24 and a suction pipe 25 for sucking up the fuel in the fuel tank 6.

If refueling tank 6 is refueled, refueling tank 6 must be removed from main unit 1 and refueled if fuel is not supplied and fuel tank 6 is inserted into main unit 1. The structure is such that refueling cannot be done unless the refueling tank 6 is taken out of the main body 1 because of the risk of overflowing and a fire.

As shown in FIGS. 3 and 4, the structure of the refueling tank 6 in the present embodiment includes an upper surface 26 on which the handle 21 of the refueling tank 6 is disposed, and an oil amount of the refueling tank 6. Total 2 3 An inclined surface 501 is formed by connecting diagonally to one surface having the provided side surface 27, and an oil supply port 28 is provided on the inclined surface 501, and a surface provided with an oil supply port 28 5 0 1 is the oil cap 2 with the pressure valve screwed into the oil inlet 2 8 with the lid 7 of the main body 1 opened.

2 has a shape set to an angle that cannot be opened. That is, as shown in FIG. 4 (b), the space sandwiched between the inclined surface 501 and the wall surface of the tank guide 11 of the tank housing chamber 500 is provided with a fuel supply cap 22 serving as a closing means. The size of the cap is not large enough to be released from the cap 28, so that the cap 22 cannot be opened when the cap 22 comes into contact with the wall of the tank guide 11 when the cap is released.

The angle at which the refueling cap with pressure valve 22 screwed to the refueling port 28 cannot be opened depends on the size of the opening surface of the lid 7 and the positional relationship with the tank guide 11 that covers the periphery of the refueling tank 6. However, a slope of at least 30 degrees is provided downward from the upper surface of the surface on which the handle 21 of the refueling tank 6 is disposed.

With the above configuration, when the refueling tank 6 is inserted into the main body 1, the refueling cap 22 with a pressure valve screwed into the refueling port 28 of the refueling tank 6 cannot be opened. It must be taken out of the main unit 1 and refueled, so there is no fear of fuel leaking into the main unit 1 when refueling the refueling tank.

As shown in Fig. 5, the valve mechanism 24 of the refueling joint 9, which is the connection means for the oil supply path when the main body of the refueling tank 6 is mounted, is separated from the valve seat around the valve hole formed below the valve box as shown in Fig. 5. An inverted conical valve body 33 having a protruding rod 33 a that is seated freely and penetrates through a valve hole at the lower end and protrudes downward, and a valve seat fitted into the conical closing surface of the valve body 33. It has a circumferential O-ring packing 34 for closing the space therebetween, and a spring 35 for urging the valve body 33 in the valve closing direction.

The coil-shaped valve body spring 35 is interposed between the valve body 33 and a lid nut 37 fitted into the upper opening of the valve box via a seal packing 36. The perimeter of the valve hole below the valve box protrudes downward, and around the protruding portion, a ring 38 for sealing the lubrication joint receiver 10 is fitted. Burning An inlet for a return passage 40 for liquefying the fuel and returning to the fuel tank 6 is formed.

A passage 39 for sucking fuel from the refueling tank 6 is formed on the upstream side of the valve mechanism 24. Further, along with the suction passage 39, fuel from the carburetor 12 is liquefied to refuel. A return passage 40 for returning to the tank 6 is formed. The surface where the refueling joint 9 is connected to the refueling tank 6 is provided with an insertion hole 4 1 for mounting the suction pipe 25 from the refueling tank 6 (Fig. 6), An insertion hole 42, which is a mouth, and a mounting hole 43 for screwing a lower portion of the refueling joint 9 to the refueling tank are formed. The refueling joint 9 is fixed to the refueling tank 6 with screws via a rubber packing 447.

A suction pipe 25 for sucking fuel from a refueling tank 6 is connected to a passage 39 flowing from an upstream side of the valve mechanism 24 of the refueling joint 9. The suction pipe 25 reaches near the bottom face opposite to the handle 21 of the oil tank 6, and a suction port 4 4 4 at the end thereof is provided with a filter 4 5 that is impermeable to water and dust. The suction port 44 may be provided on a side surface other than the bottom surface of the tip of the suction pipe 25.

Further, as shown in FIG. 6, means for detecting residual oil in the fuel tank 6 is provided in the vicinity of the suction port 444. This detecting means includes a float 46 having a built-in magnet 504 functioning as a part to be detected, and a lead switch 448 provided opposite to the float 46. The float 46 is vertically fitted to the cylindrical suction port body 47 fixed to the lower end of the suction pipe 25 so as to be able to move up and down by fuel fluctuations. When the liquid level reaches a certain level, the magnet 504 of the float 46 detects the reed switch 448 incorporated in the suction port body, and transmits the operation to the operation unit 4 to notify the operation unit 4 of running out of fuel. Display announcements can be made.

As shown in FIG. 7, the lubrication cap with pressure valve 22 is provided with a cap 48 that fits into a cap of an externally threaded lubrication port 28 provided on the lubrication tank 6 side, and a pressure A power valve mechanism 49 is provided, and the oil filler port 28 is screw-fitted through a rubber packing 50. The cap 48 has a pressure relief hole 51 for releasing pressure on the top surface, a side surface is screwed, and a terminal is curled. The rubber packing 50 serves to seal the gap between the filler port 28 and the cap 48, and a pressure release hole 52 for releasing pressure is formed in the center. The pressure valve mechanism 49 includes a valve 53 disposed in a space between the rubber packing 50 and the top surface of the cap 48, and a valve closing direction of the pressure release hole 52 for the valve 53. And a spring 54 that urges the spring. In addition, holes 97 and 98 having a diameter of 1.5 mm or less are provided on the top surface of the rubber packing 50 and the cap 48 to prevent the oil tank from becoming negative pressure. These holes 97 and 98 may be provided on the upper surface of the fuel tank.

When the fuel tank 6 is attached to the main body, there is a lubrication joint receiver 10 (Fig. 12) below the valve mechanism 24 of the lubrication joint 9. As shown in FIG. 8, the refueling joint receiver 10 includes a valve receiver 55 for receiving the valve element 33 of the valve mechanism 24 of the refueling joint 9 and a receiving body 56.

Valve receiver 5 5 has a valve mechanism of lubrication joint 9 2 valve element 3 of 4 3 valve receiver 5 that receives 3

7 and a grid hole 58 in which a passage for fuel flow is formed in a grid. The receiving body 56 is a sealing surface 59 for sealing with the valve mechanism 24 of the lubricating joint 9, a receiving space 60 for the valve receiving, and a lattice hole 58 of the valve receiving 55 to the electromagnetic pump 13. A passage 61 to be connected and a passage 62 to a T-shaped air valve 20 (FIG. 2) from the middle of the passage are provided. An annular concave groove 63 is provided around the valve receiver 55, and a passage 64 to the heat pump 18 is provided in the concave groove 63, and a passage through which fuel from the heat pump 18 returns. Has become. At the three outlets of each passage, a threaded portion is provided at the fitting part of the nut for fixing the oil supply pipe connecting the other parts.

The lubricating joint receiver 10 has an annular groove 65 outside the concave groove 63, and a cylindrical bellows-shaped packing 66 is attached to the groove 65. When the lubrication tank 6 is set in the main body 1, The refueling joint 9 valve mechanism 24 It is mounted at a predetermined position, and the 0 ring 38 outside the valve mechanism 24 is sealed with the sealing surface 59 of the valve receiving body 56 of the lubricating joint receiver 10. The lubricating joint 9 is sealed with the bellows-shaped packing 6 to be sealed.

As shown in FIG. 2, the air valve 20 is provided to shut off the fuel in the oil supply path from the oil supply tank 6 to the electromagnetic pump 13, and a receiving body 5 6 of the oil supply joint receiver 10 6 A passage leading to the air valve 20 from a passage 62 separated by a T-shape in the middle of the passage 61 to the electromagnetic pump 13 of the tank. It is arranged above the plane. The air valve 20 is set to a closed state during operation, and is set to an open state during stoppage. Then, it serves to send air to the oil supply path from the oil supply joint receiver 10 to the electromagnetic pump 13 to shut off fuel. The air valve 20 is opened when the vaporizer 12 is cleaned by baking, and the electromagnetic pump 13 is driven to send air to the vaporizer 12.

As shown in FIG. 9, the vaporizer 12 includes a vaporizing element 67 heating the fuel and vaporizing the fuel, a nozzle 68 injecting the fuel gasified by the vaporizing element 67, and a nozzle 68. Needle 69 that opens and closes the hole, solenoid valve 70 that uses electricity to move needle 69, fuel inlet 71 that supplies fuel to vaporization element 67, and gas chiller 1 2 when operation is stopped It has a return port 72 for sending out internal fuel and a heat recovery section 773 for recovering the combustion heat of the burner 14.

The vaporizing element 67 is obtained by sintering fine ceramic particles into a cylindrical shape. Tar generated when the fuel is vaporized is deposited from the surface of the vaporizing element 67 toward the inside. The fuel inlet 71 of the carburetor 12 has a double pipe structure in which a stainless steel pipe 73 is provided on the outside and a copper pipe 74 is provided on the inside.The heat transfer from the carburetor 12 By reducing the temperature, the temperature rise of the fuel entering the carburetor 12 is suppressed. The diameter of the stainless steel pipe 73 is set larger than that of the copper pipe 74, and the heat transfer is performed by setting the tip of the copper pipe 74 to a position outside the vaporizer 12. Is even lower.

The solenoid valve 70 is composed of an electromagnetic coil 75, a movable piece 76, a suction piece 77, and a pressing spring 78, and when the electromagnetic coil 75 is energized or de-energized, the movable piece 7 6 is adsorbed or desorbed from the adsorption piece 7 7, and the dollar 6 9 attached to the movable piece 7 6 moves, thereby opening or closing the hole of the nozzle 6 8 of the gadget 1 2. You.

The parner 14 includes a mixing pipe 79 for mixing the combustion gas vaporized by the vaporizer 12 with the primary combustion air, and a flame port 80 for burning the mixed combustion gas. The electromagnetic pump 13 is a pump that feeds fuel, and the suction side is disposed below and the discharge side is disposed above, so that air is prevented from accumulating in the electromagnetic pump.

As shown in FIG. 10, the heat pipe 18 has a fuel inlet 82 from the vaporizer 12 formed on the side of the container body 81, and a fuel outlet 83 on the upper surface of the container body 81. The outlet 83 is provided with a pipe 84 formed by a trumpet-shaped opening 85 and inserted into the vicinity of the inner bottom surface of the container body 81. Then, when the electromagnetic pump 13 is stopped by the room temperature control from the start of operation to the stop, the nozzle 68 of the carburetor 12 is closed, and the fuel in the carburetor 12 is discharged through the heat pipe 18. It is returned to the refueling tank 6. In addition. The amount of fuel returned is 0.3 to 0.5 CZ times, and when the oil fan heater is operated daily, the electromagnetic pump 13 stops about 10 times, so the container body 8 The volume of 1 is set to about 20 CC.

Further, a cooling fin 19 (FIG. 2) for radiating heat of the fuel returning from the vaporizer 12 is provided in the middle of a path connecting the vaporizer 12 and the heat pump 18. As shown in FIG. 11, the cooling fins 19 are composed of a pipe 87 and a thin fin 86 provided outside thereof.

Also, as shown in Fig. 2, lubricating joint receiver 10 and electromagnetic pump 13 Pump 13 and carburetor 12, carburetor 12 and cooling fin 19, cooling fin 19 and heat pipe 18, heat pipe 18 and lubrication joint receiver 10, air valve 20 and Okina oil joint The oil supply pipes 88, 89, 90, 91, 92, 93 connecting the parts of the receiver 10 are made of copper pipe. From the oil tank 6 to the electromagnetic pump 13, resin piping other than copper pipes may be used.

As shown in Fig. 3 and Fig. 4, on the surface 29 opposite to the surface 26 where the handle 21 of the refueling tank 6 is arranged, the refueling tank 6 is attached to the main body 1. The magnet 30 of the detected part is provided as a means for detecting the oil pressure. On the other hand, the reed switch 32 is mounted on the refueling tank receiver 31 (Fig. 4) of the main body facing the detected part of the refueling tank 6. When the refueling tank 6 is inserted into the main body 1, the tank detecting means composed of the magnet 30 and the lead switch 32 detects the fuel and the operation can be started.

The operation of the above configuration will be described. Open the cover 7 of the main body 1 with the empty fuel tank 6 open, hold the handle 2 1 of the fuel tank 6 and take it out.With the handle 21 facing upward, loosen and remove the oil cap 22 with a pressure valve. Fuel is supplied from the filler port 28 of the fuel tank 6.

When the refueling is completed, the lid 7 of the main body 1 is opened, and the refueling tank 6 containing the fuel is set in the tank accommodation room 500. When the refueling tank 6 is mounted on the main body, the lead switch 32 provided on the main body is operated by the magnet 30 on the bottom of the tank to determine that the tank 6 is mounted on the main body.

When the refueling nozzle 6 is attached to the main unit, when the valve mechanism 3 4 of the refueling joint 9 presses the valve receiving portion 57 of the refueling joint receiver 10 (Fig. 12), the valve body 3 3 The valve spring 35, which has been moved upward and urged, is compressed, and a gap is created between the 0-ring packing 34 on the closing surface of the valve body 33 and the valve seat. Thus, a path through which fuel flows toward the electromagnetic pump 13 is formed.

When the power switch is turned on by operating the operation switch (not shown) of the oil fan heater, the gasifier 12 is added by the vaporizer heater (not shown) attached to the vaporizer 12. Get heated. At this time, the temperature of the carburetor 12 is detected by a carburetor sump (not shown). When the carburetor 12 is heated to a predetermined temperature, the electromagnetic pump 13 is driven to refuel. The liquid fuel in the tank 6 is sucked up through the suction pipe 25 and sent to the vaporizer 12 via the refueling joint 9 and the refueling joint receiver 10.

The liquid fuel is gasified by the heated vaporizer 12, and the flame port 80 (the

9) and is ignited at the flame port 80 and burned in the combustion chamber. At this time, a controller (not shown) controls the drive of the electromagnetic pump 13 and sends it to the vaporizer 12 based on the difference between the room temperature detected by the room temperature error and the set temperature set from the operation unit. By changing the amount of liquid fuel, the calorific value of combustion is adjusted appropriately.

When combustion starts and the flame sensor detects a flame current that is equal to or greater than the preset current value, the fan is energized all the time, the blower fan rotates, and the room air is sucked. The rotation speed of the blower fan is controlled by the control device. The sucked indoor air deprives the radiant heat obtained in the combustion chamber 15 and is blown out together with the combustion gas as warm air from the outlet 5 to the outside (indoor) of the main body 1 to increase the indoor temperature.

Next, when the operation of the main body 1 is stopped, the drive of the electromagnetic pump 13 is stopped, and the energization of the vaporizer is stopped. At the same time, the solenoid valve 70 is also energized OFF, the movable piece 76 and the suction piece 77 are opened, and the hole of the nozzle 68 is closed by the needle 69 attached to the suction piece 77. The fuel remaining in the carburetor 12 passes through the gap between the body of the solenoid valve 70 and the closing surface between the needle 69 and the heat pump via the oil supply pipes 90 and 91. Stored in 1-8.

Further, the high temperature fuel is radiated by the cooling fins 19 provided in the middle of the oil feeding pipe 90 and the oil feeding pipe 91 to be cooled to be sent to the heat pipe 18. Part of the fuel in the heat pipe 18 is in a gaseous state when it is sent, but the temperature drops over time and the gas changes from a gas to a liquid. That is, when the operation is stopped or the combustion is turned off in the room temperature control, the energization of the solenoid valve 70 is turned off, the movable piece 76 of the solenoid valve 70 is released from the suction piece 77, and the suction piece 77 is opened. When the needle 6 9 attached to 7 7 closes the hole of the nozzle 6 8 of the carburetor 12, the fuel remaining inside the carburetor 12 removes the fuel from the body of the solenoid valve 70 and the needle 6 9 And is sent to the heat pump 18 via pipes 88 and 89 which are oil feed pipes.

In addition, at the time of ignition, the temperature of the fuel is raised in the carburetor 12 to change the fuel from a liquid to a gas, and the fuel is blocked for 1 to 2 minutes from the time when the fuel is ejected from the nozzle 68. The internal pressure of the gas generator 12 was increased to about 0.2 kg / cm by the hole 8 being closed, and the pressure was increased via the oil supply pipes 90 and 91 to the heat pipe 1. 8 inside.

Then, pressure is applied to the surface of the fuel that has become liquid in the container 81 of the heat pipe 18, and the oil level is pushed down to form a trumpet-shaped lower end of the pipe 84 provided inside the heat pipe 18. The liquid fuel is sent from the port 85, and it is concave via the passage 64 of the receiving body 56 of the refueling joint receiver 10 (Fig. 10) via the oil supply pipe 92 (Fig. 2). The oil is fed into the oil tank 6 via the return passage 40 (FIG. 5) of the oil joint 9 via the groove 63 and is stored therein.

When refueling the refueling tank 6, withdraw the refueling tank 6 from the main body 1 and refuel it from another container outside the main body, but at this time, the refueling tank 6 is flat with the handle 21 up. Place, and the lubrication cap with pressure valve on the surface with the handle 2 1

2 Loosen and remove 2 and refuel using the refueling pump from refueling port 28 of refueling tank 6.

In this way, when refueling the refueling tank 6, the fuel can be replenished without turning the refueling tank 6 upside down and without refueling the fuel cap of the refueling tank 6 as before.

When the refueling tank 6 is set in the main unit, the refueling port 28 4 Even if you try to open the refueling cap 22 as shown in Fig. (B)), you cannot open the cap by touching the tank guide 11 on the main body, preventing lubrication when the tank is mounted on the main body. Nature can be secured.

(Example 2)

FIG. 13 shows the structure of a fuel tank according to a second embodiment. Oil supply port 1 5 2 is provided on one side with oil meter 23 of oil supply tank 6 where oil meter 23 is provided, and oil supply cap 2 2 with pressure valve is open when lid 7 is open. The structure cannot be used.

By adopting such a structure, refueling cannot be performed unless the fuel tank is taken out of the main body, so that fuel spillage during refueling into the main body 1 can be prevented.

On the surface 15 3 opposite to the surface on which the tank handle 21 is disposed, a float switch 15 4 for the liquid level is provided as a means for detecting residual oil in the fuel inside the refueling tank 6. It is arranged. The float switch 154 is attached to a lid 155 that opens and closes a drain hole that drains water remaining inside the refueling tank 6, and the fuel inside the refueling tank 6 maintains a constant liquid level. When this happens, the float switch operates and notifies the operation section of the main unit of a display such as running out of fuel. Other configurations and operations are the same as those in the first embodiment.

(Example 3)

FIGS. 14 and 15 show the structure of a fuel tank according to a third embodiment. Refueling tank

A lubrication port 28 and a handle 21 are provided side by side on the upper surface of 6, and the handle 21 is supported by a lubrication tank so as to be able to move up and down, and after the lubrication tank 6 is inserted into the body 1, A bracket 1 8 3 for holding the oil cap with pressure valve 22 screwed into the oil port 28 is attached to the handle 21. In addition, the lubrication port 28 on the wall surface of the tank storage chamber is used to prevent the handle 21 and the bracket 18 3 from rotating when the lubrication tank 6 is inserted into the main body 1 and the handle is lying down. Solenoy consisting of metal fittings 18 1 (Fig. 15) and electromagnetic coil 182 are provided.

For details, insert the refueling tank 6 into the main unit 1 and tilt the handle 2 1 toward the refueling port 28 to close the lid 7.The tank detecting means detects that the refueling tank 6 has been inserted into the main unit 1. The energization of the electromagnetic coil and the stop bracket 18 attached to the solenoid 18 2

1 moves to the lubrication tank 6 side, and the bracket 1 8 3 holding the lubrication cap with pressure valve 2 2 of the lubrication tank 6 is pressed from above.

As a result, the oil supply cap 22 with a pressure valve screwed into the oil supply port 28 of the oil supply tank 6 cannot be opened when it is inserted in the main body 1, so if the oil supply tank is not removed from the main body, lubrication will not be possible. Fuel spillage during refueling into body 1 can be prevented.

The tank detecting means is composed of the magnet 30 and the reed switch 32 as in the first embodiment. When the fuel tank 6 is inserted into the main body 1, the insertion of the fuel tank is detected and the operation can be started. It is said.

(Example 4)

FIG. 16 to FIG. 18 are views showing Embodiment 4, FIG. 16 is a perspective view of a fuel tank, FIG. 17 is a cross-sectional view of a fuel port when the fuel tank is attached to the main body, and FIG. FIG. 8 is a cross-sectional view of a fuel filler port in a state in which the main body of the old fuel tank is removed.

As shown in the figure, the refueling tank 6 has an inclined surface 501 having a predetermined angle of at least 30 degrees downward from the upper surface of the tank between the upper surface and two side surfaces adjacent to the upper surface. A refueling port 28 (FIG. 17) is arranged on the inclined surface 501. The refueling port 28 is closed by a rotatable lid member. That is, the closing means 600 of the filler port 28 has a fixed plate 600 having a hole to be fitted to the filler port 28, spot-welded to the inclined surface 501, and integrated therewith. A movable plate 603 supported rotatably by a standing piece 602 on the upper handle side of the plate 601 on the upper handle side, and a cap 2 for an oil filler port 28 arranged on the inner surface side of the movable plate 603. 8 A packing member for closing a 6 0 4 Cover member 6 0 5, and a cover member 6 0 interposed between the cover member 6 05 and the inner surface of the movable plate 6 0 3 5 includes a coil-shaped spring member 606 that presses the fuel supply port 5 to the refueling port 28 toward the base 28a, and locking means 607 that holds the movable plate 603 in the refueling closed position.

The fixing plate 61 extends from the inclined surface 501 to the upper surface of the tank, and the bearing portion 62 3 (first 1 6) is also formed. The movable plate 603 has a handle fulcrum 6 11 on the handle side, and a locking means 6 07 disposed on the open end side, so as to open the movable plate 603 when the main body is mounted. Also, the movable plate length is set so that the open end of the movable plate cannot contact the tank guide 11 to be opened.

The lid member 605 is formed in the shape of a deep dish, and its outer end flange 608 cannot escape to the annular stopper member 610 formed on the inner surface of the movable plate 603, and the plate of the movable plate It is movably locked in a direction perpendicular to the plane. The packing 604 is an annular member fitted to the outer peripheral portion of the central protruding portion of the lid member, and is pressed against the upper edge of the base 28a. The spring member 606 is arranged in the internal space between the movable plate 603 and the lid member 605.

The locking means 607 is located on the open end side of the movable plate 603 opposite to the rotation fulcrum 6 11, i.e., on the lower end side of the inclined surface 501, and is provided in the tank of the tunder chamber. Guide 11 A pin-shaped locking section 6 1 4 with a pin-shaped locking section 6 rotatably supported on the open end side of the movable plate around the axis 6 13 15; and a hook-shaped locking receiving portion 6 16 provided on the fixed plate 61 so as to engage with the locking portion 6 14 and hold the movable plate 63 in the closed position. A lever spring 617 is provided for urging the lever 615 in a direction in which the locking portion 614 engages with the locking receiving portion 616.

The lever spring 6 17 is wound around the rotation shaft 6 18 of the locking lever 6 15, one end of which is locked to the cut-and-raised piece 6 19 of the locking lever, and the other end of which is the movable plate 60. 3 is a coil-shaped spring member locked to the stopper member 6 10, which is disposed on the inner surface side of the locking lever 6 15, and the locking lever 6 15 is located outside the movable plate 6 0 3 It is configured to bias in the direction. A coil-shaped spring member is used for the pivot 6 1 of the movable plate 63. The reason is that the movable plate 603 is prevented from jumping above the refueling tank 6 and rotating when the locking state of the locking lever 6 15 is released, so that no injury is caused. Which insecurity is eliminated.

The locking receiving portion 6 16 has a space between the side wall of the base 28 a and the locking portion 6 14 to allow the intervention, and is open to the base 28 a side. In this embodiment, the locking portions 6 14 are locked in a detachable manner.

The locking lever 6 15 has a triangular shape with a part of the outer end extending therefrom. The back surface of the locking lever 6 15 is opposed to the tank guide 11 in the locking position of the locking lever 6 15. There is formed a small gap in the finger to prevent the finger from being inserted for releasing the locking lever. When the locking lever 6 15 is locked, it does not protrude outward from the side of the tank. Also, the extended portion 620 abuts against the wall surface 11 of the tank accommodating chamber, thereby preventing the locking lever 615 from rotating and releasing.

In the upper configuration, if the locking lever 6 15 is pushed toward the base with the locking lever 6 15 locked, the locking portion 6 13 is disengaged from the locking receiving portion 6 16 and the closing means 6 is closed. 0 0 (Fig. 18) is released, but when the tank 6 is attached to the main body, the oil supply port is installed on the inclined surface 501, and the extension 6 Because of the provision of 20 (Fig. 17), the locking lever 6 15 is hidden behind the movable plate 6 03 even if the locking lever 6 15 is to be rotated and released, and the back of the locking lever 6 15 The lock lever 6 15 cannot be released because the hand cannot enter the gap in a state where the lock lever faces the wall surface of the tank storage chamber.

To release the lock lever 6 15, the release member is forcibly inserted into the gap between the lock lever 6 15 and the tank guide 11 to release the lock of the lock lever 6 15. The extended portion 6 20 of the lever 6 15 and the open end 6 3 a of the movable plate 6 3 abut against the wall surface (tank guide) 11 of the tank accommodating chamber, and the movable plate 6 3 Release is blocked. Therefore, if the oil tank 6 is not removed from the main unit, it will not be possible to refuel. Fuel spillage during refueling inside can be prevented.

Other configurations and operations are the same as those in the first embodiment, and thus description thereof will be omitted. In the above embodiment, the example in which the locking lever is arranged on the movable plate side is shown, but a configuration in which the locking lever is arranged on the fixed plate side may be adopted.

(Example 5)

FIG. 19 is a cross-sectional view of a fuel filler port showing a fifth embodiment. This embodiment is the same as the embodiment 4 in that a rotary closing means and a locking means 607 are provided on the inclined surface 501, but the open end side is arranged at the center of the tank, The rotation fulcrum 6 1 1 is arranged on the tank guide 11 side, and the regulating member 6 2 5 for preventing the opening of the closing means when the tank body is mounted is provided outside the rotation fulcrum 6 1 1 of the movable plate. This is different from Example 4 in the point. That is, the outer end portion of the movable plate 603 is bent upward from the rotation fulcrum 611 to form a regulating member 625 facing the dinner guide 11, and the locking means is provided when the main body is mounted. Even if it is released and the movable plate 603 is to be opened and rotated, the regulating member 625 contacts the wall surface of the tank guide 11 so that it cannot be opened.

In the above configuration, the inclined surface 501, the regulating member 6 25 and the tank guide wall 1

By means of 1, the means for preventing refueling port opening when the main body is mounted is constituted. If the refueling tank 6 is not taken out from the main body, refueling cannot be performed and fuel spillage during refueling into the main body 1 can be prevented.

The other configuration of the closing means is the same as that of the fourth embodiment, and the other configuration is the same as that of the first embodiment.

(Example 6)

FIG. 20 is a cross-sectional view of a fuel filler port showing the sixth embodiment. This embodiment is an example in which the closing means 600 is formed not on the inclined surface of the tank but on the upper surface. In the case where the rotating closing means as in the fourth embodiment is provided on the upper surface of the tank, the closing means 600 can be easily opened even when the main body is mounted.

In this embodiment, in order to prevent the closing means 600 from being released, the movable plate 603 is rotated. The moving fulcrum 6 1 1 is arranged on the outer peripheral side of the refueling link 6 from the open end, and the outer peripheral side is formed by bending the outer peripheral side below the rotating fulcrum of the movable plate 6 03 to form an L-shaped regulating member 6. On the other hand, the upper part of the tank guide wall 11 is retracted to the side to form a stepped part 6 27, and the lower end of the regulating member 6 25 and the stepped part 6 27 come into contact or They face each other with a small gap.

In the above configuration, when the closing means is to be opened and rotated, the lower end of the regulating member 6 25 on the side of the rotation fulcrum 6 11 1 abuts the step 6 27 of the tank guide, and the movable plate 6 0 3 cannot be released. Therefore, unless the refueling tank 6 is taken out of the main body, refueling cannot be performed, and fuel spillage during refueling into the main body 1 can be prevented.

[Other Examples]

It should be noted that the present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made within the scope of the present invention. The present invention is characterized by preventing the opening of the oil supply port arranged above the evening chunk when the main body is mounted, so that other configurations, for example, the combustion system are described in the drawings. An appropriate method can be adopted without being limited to the configuration including the vaporizing section and the parner section.

Further, in the above embodiment, the connection means of the oil supply tank has been described as having the oil supply path and the return oil path. However, the connection means may be provided with only the oil supply path. Further, in the above embodiment, the oil supply path and the return oil path are configured by one joint, but both paths may be configured by separate joints.

As described above, according to the present invention, when the fuel tank is attached to the main body, the oil port opening preventing means for preventing the opening of the closing means for closing the oil port is provided, so that the oil tank must be removed from the main body. Since refueling is not possible, there is no need to worry about fuel leakage, and safety can be improved. In addition, if a means for detecting that the refueling tank is mounted on the main body is provided, it is possible to confirm the mounting of the refueling tank and to prevent the operation from starting when the refueling tank is not mounted on the main body. Furthermore, if a means for detecting the fuel level is provided in the refueling tank, the refueling notification and display can be performed.

[Second embodiment]

[Configuration of main unit]

FIG. 21 is a schematic front view of an oil fan heater equipped with a liquid fuel combustion device according to a second embodiment of the present invention, and FIG. 22 is a schematic diagram of a liquid fuel combustion device.

As shown in the figure, the oil fan heater body 1 is formed in a box shape and operates a front plate 2 detachably provided, a top plate 3 integrally formed with a side surface, and a driving operation. An operation unit 4, an outlet 5 for blowing out hot air, and a lid 7 that can be opened and closed to open and close the oil tank 6 on the upper right side of the top plate 3 are provided. It is placed and fixed on a table 8 that receives the leaked material.

As shown in Fig. 21 and Fig. 22, the inside of the main body 1 has a tank housing chamber 1a for housing the oil supply tank 6, a carburetor A12, and an electromagnetic pump by a tank guide 11 and a partition plate 16. It is divided into a functional component storage chamber 1b for storing 13 etc. and a combustion section chamber 1c in which a parner 14 and a combustion chamber 15 are arranged.

The tank storage chamber 1a has a removable cartridge-type fuel tank 6 for temporarily storing fuel, an oil supply path 300 for feeding the fuel from the fuel tank 6 to the carburetor side, and a fuel tank 6 -Side connection means A 9 and A 10 for detachably connecting the oil supply tank and the oil supply tank 6 and the return oil path 301 for returning fuel from the carburetor A 12 to the oil supply tank 6. Return oil side connecting means A 21 and A 22 (FIG. 24). At the bottom of the tank storage chamber 1a, a mounting table I having a cushioning property for absorbing and mitigating the impact applied to the connection means A9, A10 and the power supply 21, 21 when the oil tank is stored. d is provided. In the tank storage chamber la, a refueling tank 6 is stored. It is preferable to form a guide part so that the oil supply side connection means A 9, A 10 and the return oil side connection means A 21, A 22 are securely fitted and connected when the oil supply side is connected.

The oil transfer side connection means includes an oil transfer joint A 9 having a suction pipe and a valve for opening and closing the passage, and an oil transfer joint receiver A 10 for receiving the valve of the oil transfer joint A 9. The oil transfer joint receiver A 10 has an air valve 2 0 that takes in air into the oil supply path to shut off the oil supply path 300 that is supplied from the oil supply tank 6 to the electromagnetic pump (oil supply pump) 13. Is connected. The oil transfer joint receiver A10 is mounted on the wall surface of a tank guide 11 whose upper part protrudes toward the functional component storage chamber (FIG. 21).

The functional component storage chamber 1b is disposed between the tank storage chamber 1a and the combustion section chamber 1c, and includes a carburetor A12 for vaporizing fuel from the fuel tank 6 and a fuel tank 6b. An electromagnetic pump 13 that sends fuel to the carburetor A 12, a reservoir 18 that stores the fuel from the carburetor A 12 (Fig. 22), and between the carburetor A 12 and the reservoir 18 Cooling fins 19 for cooling the fuel are accommodated.

The combustion section chamber 1 c is partitioned by a partition plate 16, and includes a parner 14 that mixes the fuel vaporized by the carburetor A 12 with the primary combustion air and burns, and a parner 14 that burns. A surrounding combustion chamber 15 and a burner box 17 for accommodating a parner 14 are accommodated therein. The carburetor A 12 and the wrench 14 constitute a combustion section for burning fuel.

The oil supply path 300 (Fig. 22) consists of a pipe 203 connecting the oil transfer joint receiver A10 and the electromagnetic pump 13 and a pipe 20 connecting the electromagnetic pump 13 and the carburetor A12. 4 is provided. The return oil path 301 is connected to a pipe 205 connecting the vaporizer A 12 and the cooling fins 19, a pipe 206 connecting the cooling fins 19 to the storage vessel 18, and a storage vessel 18. It has a pipe 207 connecting the return oil joint receiver A10. These pipes 203 to 207 are all formed of copper pipes. The piping from the oil supply tank 6 to the electromagnetic pump 13 may be piping other than copper piping, such as resin. [Composition of refueling tank]

Fig. 23 is a schematic view of the refueling tank, Fig. 24 is a perspective view showing the connection part of the refueling tank, and Fig. 25 is a cross-sectional view showing the connection between the lubricating joint and the suction pipe in the refueling tank. FIG. 26 is a structural diagram of the return oil joint.

As shown in the figure, the refueling tank 6 is made of a metal material having conductivity (for example, zinc plating steel plate) and is formed in a vertical box shape. Handle A 23 installed on the upper surface, an inclined surface 501 formed between the upper surface provided with the handle A 23 and one side surface adjacent thereto, and an inclined surface 501 A fuel supply port A 26 arranged for fuel supply, a fuel supply cap 600 for closing and revolving the fuel supply port A 26 so as to be openable and closable, and a fuel supply port A 26 provided on a side surface close to the fuel supply port A 26. Oil supply joint A 9 and return oil joint, which are located on the opposite side of the oil supply port A 26 on the upper surface where the oil level gauge A 25 that makes it possible to see the lubrication state and the handle A 23 are provided. A 21 is provided.

As shown in Fig. 25, the oil transfer joint A 9 has a horizontal L-shaped connection pipe A 43 projecting from the upper surface of the oil supply tank 6 to the side of the tank, and a spindle provided at the end of the connection pipe A 43. And a joint body 9a having a built-in valve mechanism A28. The joint main body 9a is formed in a vertical cylindrical shape, and a cylindrical small-diameter projecting cylinder 9b is formed on the lower surface thereof to be fitted to the oil feed joint receiver A10 (FIG. 24). An O-ring A41 for connection seal is fitted around the periphery. An openable / closable cover nut A38 for inserting the valve mechanism A28 is screwed into the upper end opening of the joint body 9a.

The valve mechanism A28 in the joint body 9a is separated from the central valve hole 9c of the small-diameter protruding cylinder 9b of the joint body 9a and the inverted conical valve seat 9d formed in the lower part of the joint body. A seat-free spindle-shaped valve element A30 and a spring A35 interposed between the upper end of the valve element A31 and the nut A38 to bias the valve element A31 in the valve closing direction. And a sealing O-ring A33 fitted to the valve seat A-side peripheral surface of the valve body A31. In this state, the lower end of the valve element A31 projects downward from the small-diameter projecting cylinder 9b. The connection pipe A43 has a suction passageway 43a formed therein to communicate with the valve chamber in the joint body 9a, and the end protruding toward the tank side is formed on the side of the joint body 9a. They are connected integrally. The lower end of the connecting pipe A 43 is inserted into the tank through the insertion hole A 46 on the upper surface of the lubrication tank 6, and the flange 43 b formed at the lower part is filled with the lubrication tank 6 via rubber packing A 50. It is fixed to the hole A 47 on the upper surface by screws. A male screw is engraved on the outer peripheral surface of the lower end of the connection pipe A43, and the upper end of the suction pipe A27 in the oil supply tank is screwed to this male screw.

The suction pipe A27 reaches near the bottom of the oil supply tank 6, and a suction port A44 formed at the lower end side of the suction pipe A27 is provided with a filter A45 that does not allow water and dust to pass through. The suction port A44 may be provided on the bottom surface of the lower end of the suction pipe A27.

The return oil joint A 21 is, as shown in Fig. 26, arranged side by side on the upper surface of the oil tank 6 together with the oil feed joint A 9, and the point where the suction pipe A 27 is not connected The structure is basically the same as that of the oil transfer joint A9 except that a pressure valve mechanism 700 of the oil supply tank 6 is provided. Therefore, the structure other than the above difference will be briefly described.

As shown in Fig. 26, the return oil joint A21 is provided at the end of the horizontal L-shaped connection pipe A30 projecting from the upper surface of the oil supply tank 6 to the tank side, and the connection pipe A30. And a joint body 21a having a spindle type valve mechanism A29 built-in.

The joint body 2 la is formed in a vertical cylindrical shape, and a cylindrical small-diameter projecting cylinder 2 1 b is formed on the lower surface thereof, which is fitted to the oil joint receiver A 22 (FIG. 29). An O-ring A42 for connection seal is fitted around the outer peripheral portion. An openable and closable cover nut A40 for inserting the valve mechanism A29 and the pressure valve mechanism 700 is screwed into the upper end opening of the joint body 21a.

-The valve mechanism A29 in the main body 21a is a small diameter projection of the joint main body 21a. A central valve hole 21c of the cylinder 21b, a spindle-shaped valve element A32 that can be freely attached to and detached from an inverted conical valve seat 21d formed in the lower part of the joint body, and this valve element A A spring A36 for urging the valve 32 in the valve closing direction, and a sealing O-ring A34 fitted to the valve seat A32 on the valve seat side peripheral surface are provided.

The valve element A32 has a lower end in a closed state and protrudes downward from the small-diameter protruding cylinder 21b, and a ball valve element 73 of the pressure valve mechanism 700 is provided at an upper end side. A push rod 709 capable of being pressed is formed. The spring A36 is interposed between the upper surface of the valve body A32 and the lower surface of the valve seat body 720 of the pressure valve mechanism 700 described later.

The connection pipe A30 has a return passageway 30a formed therein, which communicates with the valve chamber in the joint body 21a, and the end protruding toward the tank side is located on the side of the joint body 21a. Unit is connected integrally. The lower end of the connecting pipe A30 is inserted into the tank through the insertion hole A48 on the upper surface of the lubrication tank 6, and the lower flange 30b is formed through the rubber packing A51. It is fixed to the hole A49 on the upper surface by screws.

In the present embodiment, it is possible to prevent the air pressure in the tank from rising due to the temperature difference between the inside and outside of the refueling tank 6 and the liquid level in the tank to cause fuel leakage, and to prevent the tank from becoming a negative pressure. For this purpose, a pressure valve mechanism 700 is provided at the return oil joint A 21.

The pressure valve mechanism 700 includes a cylindrical valve seat 702 with a valve hole 701, which is disposed above the valve body A32, and a valve hole 70 of the valve seat 702. A ball valve 703 that can be freely attached to and detached from the closing surface in the valve chamber above 1, a spring 704 that biases the ball valve 703 toward the seating side, and the valve seat. And a cover nut A40 for positioning the body 702 in the joint body 21a.

An air hole 705 is formed in the center of the lid nut A40, and the spring 704 is interposed between the ball valve 703 and the lid nut A40. The diameter of the valve hole 70 1 is set so that the push rod 7 09 of the valve body A 32 can penetrate. When the valve A32 is pushed upward, the push rod 709 pushes the ball valve 703 upward through the valve hole 701 when the valve A32 is pushed upward. The valve hole 701 is opened, and the inside of the tank and the air 705 of the lid nut A40 communicate with each other through the connection pipe A30 (FIG. 24).

In the oil transfer joint A9 and the return oil joint A21, both the valve bodies A31 and A32 of the joint main body are set downward and are arranged at the same level, and the oil transfer joint receiver is arranged facing upward and facing upward. A10 and return oil joint receiver A22 are fitted and connected in the vertical direction. Therefore, by simply mounting the refueling tank 6 from above the tank chamber 1a, the two connecting means A9, A10 and A21, A22 can be connected smoothly.

Fig. 27 is a block diagram of the oil supply side connection means A9, A10, Fig. 28 is a structural view of the oil supply joint receiving part, and Fig. 29 is a structural view of the return oil side connection means. As shown in the figure, in the tank accommodating la la (FIG. 21), with the oil tank 6 being accommodated, the oil joint receiver A 10 and the oil joint holder A 10 opposing below the oil joint A 9 and the return joint A 21. A return oil joint receiver A 22 is arranged.

As shown in Fig. 28, the oil transfer joint receiver A10 has a concave shape with a circular cross section that opens on the upper surface of the cylindrical receiver body 10a and allows the lower end projecting cylinder 9b (Fig. 26) of the oil transfer joint A9 to intervene. A receiving portion A61 and a valve mechanism A60 which is arranged in the receiving portion A61 and opens and closes by contact pressure and separation between the valve body A31 of the valve mechanism A28 of the oil transfer joint A9 (Fig. 27) (Fig. 27) It has.

At the upper end of the concave receiving portion A61, there is formed an annular sealing surface A67 that can be in close contact with the periphery of the small-diameter projecting cylinder 9b of the oil feed joint A9. Further, a valve receiver housing # 5A68 (FIG. 27) is recessed in the bottom surface of the receiver A61, and a valve receiver A65 is fitted into the valve receiver housing A68. In the valve receiver A65, a valve hole 60b communicating with a valve chamber 60a formed in a lower portion of the receiver main body 10a is formed, and a lattice-shaped passage A66 through which fuel flows is formed around the valve hole 60b. The valve mechanism A 60 includes a valve body A 62, which can be freely attached to and detached from the valve seat of the valve chamber 60 a, and whose upper end projects through the valve hole 60 b to the receiving portion A 61 side. A spring A 63 interposed between the head of 62 and the valve receiver A 65 to urge the valve body A 62 in the valve closing direction, and a spring A 63 on the valve chamber 60 a side of the valve body A 62 It is composed of an O-ring A64 that is closely fitted to the outside and seals with the valve seat. The valve mechanism A60 is opened by the valve body A31 of the oil transmission joint A9 contacting the head of the valve body A62 on the receiving side, and is opened from the head of the valve body A62. The valve closes when separated.

Further, a passage A 69 communicating with a pipe 203 connecting to the electromagnetic pump 13 (FIG. 22) is formed below the valve chamber 60 a of the receiving body 10 a. A passage A 70 (FIG. 28) of the air valve 20 communicates with the side of 60 a. The passage A 70 is provided above the liquid level of the fuel tank in a full state. The air valve 20 is provided to take in air that shuts off fuel in the oil supply path 300 from the oil supply nozzle 6 to the electromagnetic pump 13 into the oil supply path 300, and is provided with a valve body. A valve 20 a disposed in the air intake passage; an electromagnetic coil 20 b disposed on the outer periphery of the valve body to move the valve 20 a in the valve closing direction of the passage A 70 by excitation thereof; And a spring 20c for urging the child 20a in the valve opening direction. The operation of the air valve 20 is such that the air valve 20 is in a closed state during operation, and is open during a stop to take in air that shuts off fuel in the oil supply path 300. . In addition, the air valve 20 sucks air when the carburetor A 12 (FIG. 22) is dry-cleaned and drives the electromagnetic pump 13 to send air to the carburetor A 12. It also plays a role.

On the other hand, the return oil joint receiver A 22 has basically the same structure as the oil feed joint receiver A 10 except that the air valve 20 does not exist. Therefore, the structure of the return oil joint receiver A 22 is briefly described as follows. As shown in FIG. 29, the return oil joint receiver A 22 has a concave receiving part A 72 formed on the upper surface of the receiving main body 22 a and this receiving part A 72. 2 Return oil joint A 21 Valve mechanism A 29 Contact pressure with valve body A 32 And a valve mechanism A71 that opens and closes.

An annular sealing surface A 78 is formed at the upper end of the receiving portion A 72, and the valve receiving portion A 76 is fitted into a valve receiving receiving portion A 79 recessed on the bottom surface of the receiving portion A 72. Have been. The valve receiver A76 is formed with a valve hole 71b communicating with the lower valve chamber 71a of the receiver body 22a, and has a grid-like passage A77 around which fuel flows. .

The valve mechanism includes a valve element A 73 that can be freely attached to and detached from the valve seat of the valve chamber 71 a and whose upper end projects through the valve hole 71 b to the receiving portion A 72 side, and a head of the valve element A 73. The spring A 74, which is interposed between the valve body A and the valve receiver A 72 and urges the valve body A 73 in the valve closing direction, is fitted to the valve body A 73 on the valve chamber 71 a side. O7 ring A75 for the return seal, and the valve body A32 of the return oil joint A211 opens by contact pressure of the head of the valve body A733 on the receiving side. The valve closes when separated from the head of 3. In the lower part of the valve chamber 71a of the receiving body 22a, there is formed a passage A80 (Fig. 29) which communicates with the piping 200 connected to the storage container 18 (Fig. 22). ing.

In the above configuration of the refueling tank 6 and the connecting means A9, A10 and A21, A22, when the refueling tank 6 is set from above into the tank accommodating chamber 1a of the main body 1, the connecting means is transferred. The oil joint A 9 and the return oil joint A 21 are attached to the predetermined positions of the oil feed joint receiver A 10 and the return oil joint receiver A 22, and each joint body 9 a, 2 la has a small-diameter protrusion 9. The 0-rings A 4 1 and A 4 2 outside b and 2 1 b are sealed by the sealing surface A 67 of the oil transfer joint receiver A 10 and the seal surface A 78 of the return oil joint receiver A 22. It becomes hermetically sealed. At the same time, the valve mechanisms A 28, A 29 and the receiving valve mechanisms A 60, A 71 of the respective joints press each other, so that the valve is opened.

Further, on the return oil joint A 21 (Fig. 26) side, the valve body A 32 moves upward due to the opening of the valve body A 32, and the upper push rod 709 is pressed. The valve mechanism 700 moves upward from the valve hole 701, and pushes up the ball valve element 702, so that the valve hole 701 is opened. Therefore, the joint body 2 is connected through the connecting pipe A30 from inside the tank. A communication passage is formed through the valve hole 701 and the air hole 705 in 1a, making the tank internal pressure equal to the tank external pressure, fuel leakage due to temperature rise in the tank, and negative pressure in the tank. Can be prevented.

Fig. 30 is a side view of the refueling tank, Fig. 31 is a cross-sectional view showing the configuration of the tank bottom, Fig. 12 is a cross-sectional view of the inside of the tank, and Fig. 33 is a perspective view of the water receiving tray mounting hole on the bottom of the tank. FIG. As shown in the figure, the fuel tank 6 of the present embodiment has a fuel amount detecting means 7500 (FIG. 32) for detecting the amount of fuel in the fuel tank at the bottom of the tank, and water accumulated in the fuel tank. And a tank mounting detecting means 900 (FIG. 31) for detecting whether or not the refueling tank is mounted on the main body. The tank mounting table Id (FIG. 32) has legs 7 55 on its outer periphery for mounting on the mounting table 8, a central portion protruding downward, and a water receiving tray 8 recessed downward on the upper surface side. 0 1 is formed with a concave portion 754, and its outer peripheral portion is made of a synthetic resin that is a mounting table 757 on the bottom surface 6b of the tank, and has a central convex portion 756 (third portion). 1) is fitted in the hole 8a of the mounting table 8.

(7) The detection means 800 is a conductive water tray 8 0 1 provided on the conductive tank bottom for storing dew condensation water, and a first electrode 8 0 3 which is in contact with the bottom of the refueling tank 6. A water-tight packing 80 as an insulator that electrically insulates the water receiving tray 800 and the fuel supply nozzle 6 from each other, and a second electrode 8002 that contacts the water receiving tray 800. Water is detected based on a difference in electric resistance between water and fuel stored in the basin 8001. The first electrode 803 functions as an electrode provided in the fuel tank, and the second electrode 802 functions as an electrode provided outside the fuel tank.By flowing a small current between these electrodes, It is designed to detect the presence or absence of water in the tank using the difference between the electrical resistance values of water and fuel.

The water tray 8001 is formed separately from the tank 6 using a stainless steel plate to prevent the occurrence of cracks, and has a dish-shaped upper surface side, and an outer peripheral portion thereof. A peripheral flange 8 07 extending radially outward is formed at Reference numeral 7 is attached to the bottom mounting hole 805 of the fuel tank 6 via a rubber packing 804.

The packing 804 is a non-conductive and strong conductive material interposed between the peripheral wall of the bottom mounting hole 805 of the oil tank 6 and the peripheral flange 807 of the water receiving tray 801. The flange 807 of the water receiving tray 801 is sandwiched from above and below. The packing 804 is fixed around the tank mounting hole 805 by a ring-shaped holding member 809 and a screw 810 arranged on the lower surface thereof. It is fixed to 0 5 in a watertight state.

The rubber packing 804 is made of a non-conductive oil-resistant and water-repellent rubber member, and specifically, has excellent oil resistance, such as NBR (nitrile rubber). For example, fluorine rubber excellent in water-based properties is used. In particular, if the packing has poor water repellency, water will accumulate and water will remain in the packing and the metal part of the refueling tank 6 even after draining, causing a malfunction. Since water-based rubber material is used, accurate and accurate water detection is possible. Both the electrode 8002 on the water receiving tray 8001 side and the electrode 803 on the ink tank side are mounted on the tank mounting table 1d outside the refueling tank. The electrode 8002 on the side of the water receiving tray 8001 projects from the bottom wall of the recess for receiving the water receiving tray toward the sunset, and is formed as a needle-shaped electrode that contacts the outer surface of the water receiving tray 800 when the evening tray is placed. I have. The tank-side electrode 803 is a needle-like electrode that is exposed on the outer peripheral mounting surface 757 of the mounting table 1d and contacts the bottom surface 6b of the tank when the tank is mounted. By connecting both electrodes to the power supply, the power supply leads to the water pan side electrode 802, water pan 801, fuel or water on the inner surface, tank bottom surface 6b, tank side electrode 803, and power supply. An electric closed circuit is configured, and the presence of water can be detected based on the difference in electrical resistance between the liquid (fuel and water) inside the water tray 801.

In order to increase the water detection accuracy, the mounting hole on the tank

The hole wall of 805 is bent downward and the circumference of the bent portion 8 1 1 (Fig. 33) The needle portion 812 with a narrow width and an acute end is formed to protrude downward at intervals at a plurality of locations in the direction, and the 釙 portion 812 functions as a tank-side tip electrode, and the tank-side electrode Conduction is made between 803 and the tank bottom as a conduction path. The suction port A44 for sucking up the fuel from the tank is provided above the needle portion 812 so as to prevent the water in the internal water receiving portion of the water receiving tray 81 from being directly sucked. In addition, by covering the inside of the bottom of the water tray 801 with the non-conductive paint, etc., excluding the inside and outside, water is applied to the packing 804 and the metal part of the refueling tank 6. The remaining state does not cause a malfunction.

In addition, the inside of the refueling tank 6 is covered with non-conductive paint, etc., from the inside of the tank to the area above the suction port A44, which sucks up fuel, so that water can be supplied by a method other than the water detection method using electricity. Evil effects can be prevented.

As shown in FIG. 30, a tank die 901 that guards the water receiving tray 800 is welded around the conductive water receiving tray 801 provided on the bottom surface of the refueling tank 6. The shape of this tank die 901 is higher than the surface to be welded to the refueling tank 6, and is further provided with a rib or U-shape 902 around the height that is higher than the height of the water tray 801. It is. For this reason, when the oil tank 6 is taken out of the main unit and the oil is filled with the oil inlet upward, even if there is foreign matter on the bottom surface of the oil tank 6 or the surface that comes in contact with the water pan 801, the tank bottom and The water tray 8001 can be protected from scratches and dents, thereby preventing erroneous detection of water.

The fuel amount detecting means 75 (FIG. 32), which detects the amount of fuel in the tank, is a float 752 having a built-in magnet 751, which is located inside the tank and functions as a part to be detected. And a reed switch 753 installed on the tank mounting table 1d side opposite to the float 752 so as to be turned ON / OFF in accordance with the approach / separation of the magnet 751.

The float 752 is mounted inside a permeable tubular guide with a canopy Ί54 with a magnet placed on the lower side so that it can move up and down as the fuel level changes. The lower end surface of 4 is integrally fixed to the inner surface side of the water receiving tray 800 of the water detecting means 800. The lead switch 753 is fixed to the lower surface of the central projection of the tank mounting table 1d so as to face the float 752. The guide 754 protects the commercially available refueling hose from coming into contact with the float 755 when the fuel in the refueling tank 6 is drained. Is processed to prevent burrs on the inside.

Therefore, when the fuel inside the refueling tank 6 decreases to a certain level, the reed switch 753 senses the magnet of the float 752, and the operation is controlled by the control circuit 95. It is sent to the 0 (Fig. 32) side, and the display section 952 can notify of running out of fuel and the like.

In the tank mounting detection means 900 (Fig. 31), the switch body 901a is installed on the lower surface of the tank mounting table 1d, and the movable contact 901b is formed on the outer circumferential mounting surface 575 The movable contact 9 0 1 b is pushed by the tank when the tank 6 is mounted on the mounting surface 7 5 7 It is turned on.

[Composition of vaporizer and Pana]

FIG. 34 is a configuration diagram of the vaporizer and the panner section. As shown in the figure, the vaporizer A 12 comprises a vaporizing element A 81 for heating and vaporizing the fuel, a nozzle A 82 for ejecting the fuel vaporized by the vaporizing element A 81, and a nozzle A 82 Needle A 83 for opening and closing the hole, solenoid valve A 84 connected to the needle A 83 to move the dollar A 83, and fuel inlet A 8 for supplying fuel to the vaporizing element A 81 5, a return circuit A86 for sending out the fuel inside the carburetor A12 when the operation is stopped, and a heat recovery unit A87 for recovering the combustion heat of the parner 14.

The vaporizing element A81 is obtained by sintering fine ceramic particles into a cylindrical shape. Tar generated when the fuel is vaporized is deposited from the surface of the vaporizing element A81 toward the inside. The fuel inlet A85 of the carburetor A12 is connected to the outer stainless steel pipe A88, It has a double structure with the inner copper pipe A89. The reason why the stainless steel pipe A88 is used is to reduce the heat conduction from the vaporizer A12 and suppress the temperature rise of the fuel entering the gasifier A12. In addition, the diameter of the stainless steel pipe A88 is larger than that of the copper pipe, so that the heat conduction from the stainless steel pipe A88 to the copper pipe is further suppressed. The tip of the copper pipe A89 extends to a position outside the vaporizer A12.

The solenoid valve A 84 is composed of an electromagnetic coil A 90, a movable piece A 91, a suction piece A 92, and a pressing spring A 93, and by energizing and de-energizing the electromagnetic coil A 90. The movable piece A 91 is attracted to and desorbed from the suction piece A 92, and the needle A 83 attached to the movable piece A 91 is moved, so that the nozzle A 82 of the air doll A 12 is moved. The hole is opened and closed.

The burner 14 comprises a mixing pipe A 94 for mixing the combustion gas vaporized by the vaporizer A 12 with the primary combustion air, and a flame port A 95 for burning the mixed combustion gas. I have. A frame rod 953 as a flame detecting means is disposed above the flame port A 95, and the frame rod 953 and the conductive burner 14 are a pair of electrodes, and a fine electrode is provided between the two. The state of the flame can be detected by using the fact that a current flows and a flame current corresponding to the resistance value flows due to the action of ions present in the flame.

[Composition of electromagnetic pump, storage container, cooling fin]

The electromagnetic pump 13 is for sucking up the fuel in the fuel tank 6 and sending it to the carburetor A12 side as shown in FIG. ) Controls the fuel discharge amount and the like.

FIG. 35 is a sectional view of the storage container. As shown in the figure, the storage vessel 18 is kept in the vaporizer A 12 by stopping the electromagnetic pump 13 in the room temperature control and closing the nozzle A 82 of the vaporizer A 12 during the period from the operation start to the stop. When the fuel remaining in the tank is returned to the refueling tank 6, it is provided to temporarily store the returned fuel and cool it. The container body A 96 of the storage container 18 is sealed, and its capacity is set to about 20 CC. This is because, as described above, when the fuel remaining in the carburetor A 12 is returned to the refueling tank 6, a portion of the vaporized fuel is liquefied to become fuel. The minute is approximately 0.3-0.5 C CZ times. Assuming that the number of times the electromagnetic pump 13 stops when the amount of combustion changes due to room temperature control when the oil fan heater is operated throughout the day is about 10 times, the amount of fuel returned per day is about 3 to 5 CC Becomes Therefore, the container body A96 has a capacity (about 20 CC) that can sufficiently store this return amount.

An inlet A97 for the combustion gas from the carburetor A12 is formed on the side surface of the container body A96, and an outlet A98 of the fuel accumulated in the container body A96 is formed on the side of the container body A96. It is formed on the upper surface. At the outlet A98 on the upper surface of the container, a pipe A99 reaching the vicinity of the bottom surface inside the container body A96 is provided, and the lower end thereof is a trumpet-shaped suction port 200, and the fuel accumulated in the container is provided. Are easily sucked without generating surface tension.

FIG. 36 is a cross-sectional view of a cooling fin 19 provided in the middle of a path connecting the vaporizer A 12 and the storage vessel 18. As shown in the figure, the cooling fins 19 are formed by forming a large number of thin fins 201 outside the pipe 202, and the heat of the fuel returning from the carburetor A 12 radiates heat. Has a role.

[Configuration of control device]

Fig. 37 shows combustion by signals from water detection means 800 (Fig. 32), flame detection means 953 (Fig. 34), and tank mounting detection means 900 (Fig. 31). FIG. 3 is a configuration diagram of a control circuit for controlling. It should be noted that the feature of the present invention is that, in the combustion control by the flame detection means 953, the main focus is on the timing of receiving water detection, etc., so that in FIGS. 37 and 38, the fuel amount detection which is not directly related to this is performed. Means 750 are not shown.

As shown in the figure, the control circuit 950 is a microcomputer with a built-in CPU, ROM, and RAM. The input side is connected to flame detection means 953, water detection means 800, tank mounting detection means 900 and operation switch 954, and the output side has a combustion section (vaporizer heater, The load of the electromagnetic pump, valve drive, etc. is included. 955 and the display 952 are connected to control the combustion by various input signals.

The control circuit 950 receives the signal from the 7_Κ detecting means 800 to detect the presence or absence of water. The water detecting judging means 961 and the signal from the flame detecting means 953 receive the flame current value. And a flame detection judging means 962 for detecting the combustion state by comparing the flame level with the set flame level, and a tank mounting judging means for judging whether or not the tank is mounted by receiving a signal from the tank mounting detecting means 900. Control that outputs the control signal to the combustion unit 955 and display unit 952 in response to the signal from the operation switch 954 and the timer measurement means 964. Part 9 6 5 is provided.

FIG. 38 is the analog electric circuit diagram. As shown in the figure, in this electric circuit, power is supplied from an AC power supply AC via a transformer TR, the power supply is subjected to full-wave rectification by a diode bridge DB, and then is subjected to 24 V by a three-terminal regulator IC 2. Get power supply. The 24 V power supply is stabilized by the electrolytic capacitor C 5 and the film capacitors C 3 and C 4, is supplied to the frame rod 953, and the control circuit (IC 1) 950 can detect the flame current value. It has become. In addition, a 5 V power supply is obtained from the 24 V power supply using a three-terminal regulator IC 3. The 5 V power is stabilized by the electrolytic capacitor C 8 and the film capacitors C 6 and C 7 and supplied to the power lines of the operation switch 954 and the micro switch 900 for tank installation detection, and the combustion control circuit ( IC 1) 950 can detect ON / OFF.

In this combustion control circuit 950, the flame detecting means 9553 is operated with a higher priority than the water detecting means 800, so that the current value is read, and the reading operation of the water detecting means 800 is performed. Is limited to the prescribed state only. In other words, the combustion control circuit 950 supplies the water for a predetermined period immediately after the operation is stopped, immediately after the operation starts, or only during a predetermined period during the combustion. The energization of the detecting means 800 is urged, and a signal from the water detecting means 800 is received. Further, the combustion control circuit 950 is configured not to receive a signal from the water detecting means 800 for a certain period of time after receiving the tank mounting signal from the tank mounting detecting means 900.

Therefore, since the water detection is read only for a limited period, the tank can be prevented from being touched, and only one of the flame detection means 953 and the water detection means 800 is operated. Therefore, even if the ground electrode is common, the detection accuracy can be improved.

In the control section 965 (Fig. 37), when the 7K detection signal is received by the water detection judging means 961, the user is notified of the 7_Κ detection state to the display section 952 and drains the water in the tank. Prompt. During operation stop or immediately after start of operation, control is performed so that the drive of the electromagnetic pump 13 in the combustion section 955 is stopped simultaneously with the water detection.

If water is detected during combustion, the water detection is notified to the display section 952, but the operation is not stopped as it is, but the flame current value from the flame detection means 953 is read once and the flame is read. When the detection level is higher than the preset flame level, the combustion is continued as it is, and when the flame detection level is lower than the set level, the electromagnetic pump 13 of the combustion unit 955 is stopped so that the combustion is stopped for the first time. Output a signal. Therefore, even if the water detection means 800 malfunctions during combustion, the operation can be continued as it is, so that effective combustion control can be performed.

[Operation of oil fan heater]

Next, the operation of the oil fan heater will be briefly described. Open the cover 7 of the main body 1 and remove the empty oil tank 6 by holding the handle A23 of the oil tank 6, then open the closing means 600 with the handle A23 facing up. Fuel is supplied from the filler port A26.

When the refueling is completed, open the lid 7 of the main unit 1 and set the refueling tank 6 containing the fuel in a predetermined position. Then, as shown in Fig. 27 and Fig. 29, Valve mechanism A28 of return oil joint A9 and valve mechanism A28 of return oil joint A21 valve mechanism A29 and A32, respectively, of the valve mechanism A31 and A32 of oil supply joint receiver A10 valve mechanism A60 and return oil joint receiver A22 Valve mechanism Hold down the respective A62, A73 of A71, and lower the A62, A73.

These valve bodies A62, A73 head A62 a, b 73 & b ab 61, a 7

2, the valve elements A31 and A32 of the oil transmission joint A9 valve mechanism A28 and the return oil joint A21 valve mechanism A29 move upward and urge in the valve closing direction. The springs A 35 and A36 are compressed, and the closing surfaces of the valves A 31 and A 32 〇 Rings A 33 and A 34 create gaps between the oil feeding joint A 9 and the closing surface of the return oil joint A 21, respectively. The oil supply path 300 (FIG. 22) through which fuel flows from the gap to the electromagnetic pump 13 and the return oil path 301 from the storage container 18 to the oil supply tank 6 are opened.

When the operation switch 954 (FIG. 37) of the oil fan heater is turned on to turn on the power, the gas heater A12 is heated by the gas heater (not shown) attached to the vaporizer A12. You. At this time, the temperature of the carburetor A 12 is detected by a carburetor thermistor (not shown), and when the carburetor A 12 is heated to a predetermined temperature, the electromagnetic pump 13 is driven to refuel. The liquid fuel in 6 is sucked up via suction pipe A27 (Fig. 22) and sent to vaporizer A12 via oil transfer joint A9 and oil transfer joint receiver A10. The liquid fuel is gasified by the heated vaporizer A12, is blown out from the burner port A95 of the burner 14, is ignited at the burner port A95, and burns in the combustion chamber 15.

At this time, the control circuit 950 controls the drive of the electromagnetic pump 13 based on the difference between the room temperature detected by the room temperature sensor 153 (the temperature sensor) and the set temperature set by the room temperature setting switch 157 of the operation unit. By changing the amount of liquid fuel sent to the carburetor A12, the amount of heat generated by combustion is appropriately adjusted.

Combustion starts, and the flame sensor 953 generates a flame current higher than the preset current value. When it is detected, the fan motor is energized and the blower fan rotates to suck indoor air. The rotation speed is controlled by the control section 950. The drawn air in the room takes away the radiant heat obtained in the combustion chamber 15 and blows it out as hot air with the combustion gas from the outlet 5 to the outside of the main unit 1 (indoor), and the indoor temperature rises and is controlled at the optimum temperature. I do.

It should be noted that the present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made within the scope of the present invention. For example, in the above embodiment, the flame detection and the water detection in the removable fuel tank are described. However, the combustion control based on the flame detection and the water detection can be applied to the fuel tank fixed to the main body.

As described above, according to the present invention, the state of the flame in the combustion section is detected by the flame current value, the water in the refueling tank is detected by the difference in electric resistance between the fuel and the fuel, and the detection results are used. Since the combustion section is controlled, it is possible to prevent water from being sent to the combustion section side. In this case, if only one of the flame detecting means and the water detecting means is operated, the detection accuracy of both the detecting means can be improved. Combustion control can be effectively performed by limiting the period to a period in which flame detection is unnecessary, such as the time and a predetermined period during combustion.

[Third Embodiment]

[Configuration of main unit]

FIG. 39 is a perspective view of the oil heating apparatus according to the present invention as viewed from the front, and FIG. 40 is a perspective view of the same oil heating apparatus as viewed from the back of the main body. As shown in Fig. 39 and Fig. 40, in the oil heating equipment, the external part of the main body B1 that houses the combustion part and the refueling tank has a front plate B6 that covers the front, It is formed in a box shape with a lower opening from a side back plate B7 covering the back surface and an upper plate B8 covering the upper surface, and the main body B1 is placed on a table B5. An outlet B2 for blowing warm air into the room is formed at a lower portion of the front plate B6, and an operation section B3 containing switches for switching operation states is arranged at an upper portion of the front plate B6. You. The upper plate B8 is formed with an outlet 4b of a fuel tank, and the outlet 4b is provided with an ink lid B4 which can be opened and closed.

On the back side of the side back plate B7, a convection fan B9 for sucking indoor air is arranged, and the convection fan B9 of the convection fan B9 is guided by the convection guard B10 to suck dust. Can be prevented. A temperature sensor B11 for detecting the indoor temperature is provided on the back side of the side back plate B7.

FIG. 41 is a schematic diagram showing a liquid fuel combustion device and its fuel path in the oil heating equipment of FIG. 39. The liquid fuel combustion device A has a fuel tank B12 that can be removed from the main body B1 and a carburetor B15 with the fuel tank B12 and the combustion section B25 when the fuel tank B12 is mounted on the main body. Connection means B 13 and second connection means B 17, an electromagnetic pump B 14 as an oil feed pump for sending fuel to the fuel tank B 12, and an electromagnetic pump B 14 A vaporizer B15 that heats the fuel into vaporized gas and a burner B16 that ejects the vaporized gas from the vaporizer B15 from the nozzle and mixes it with combustion air to burn, An air valve B18 is provided as a shutoff valve that sends air and blocks the supply of fuel to the electromagnetic pump B14 side.These components are connected to connect the fuel tank B12 to the carburetor B15. An oil feed path B for feeding fuel and a return oil path C for returning fuel from the carburetor B 15 to the fuel tank B 12 are formed.

In the oil supply path B, the first connection means B 13 on the oil supply side of the oil tank and the electromagnetic pump B

Pipe 14 is connected between pipes 14 and 14, and pipe B 22 is connected between electromagnetic pump B 14 and vaporizer B 15. In the return oil path C, the carburetor B15 and the second connection means B17 on the return oil side are connected by a return oil pipe B23.

The connecting means B13 and B17 for connecting the refueling tank B12 and the combustion section B25 were provided in the oil supply path B from the refueling tank B12 to the electromagnetic pump B14. First connection means B 13 and return oil path C for returning fuel from carburetor B 15 to fuel tank B 12 And second connection means B 17 provided therein. Each of the connection means B 13 and B 17 is configured to be separated into a connection joint portion on the fuel tank side and a connection joint receiving portion on the combustion portion side. As will be described later, on the refueling tank B12 side, both connection joints B13a and B17a of the first and second connection means B13 and B17 are integrated into a joint. Section B47 (Fig. 49) is constructed, and the connection joint receivers 13b and B17b of the first and second connection means B13 and B17 are provided on the combustion section side. The joint receiving portion 100 (FIG. 64) is configured by being slid, and has a compact structure.

FIG. 42 is a view showing a state where the front plate side of the main body of FIG. 39 is partially cut. As shown in the figure, when viewed from the front of the main body B1, a combustion section B25 is disposed on the left side, and a refueling tank B12 and an electromagnetic pump B14 are disposed on the right side. The left side of the main body B 1 has a combustion section B 25 incorporating a burner B 16 and a carburetor B 15, a combustion section frame B 26 surrounding the combustion section B 25, and a combustion section frame B 2 6 and B 27 in front of the combustion part frame that covers the upper part of the front surface.

The combustion section B25 includes a vaporizer B15, a burner B16, a parner box B28 for storing a burner B16, and a burner for fixing the burner box B28. It has a partition plate B29 and a combustion chamber B30 surrounding the flame of the burner B16.

FIGS. 43 and 44 are structural diagrams of the vaporizer B 15 and the burner section 16. As shown in the figure, the vaporizer B 15 is comprised of a vaporizing element B 15 a that is housed in the main body and heats and vaporizes the fuel, and a nozzle that ejects the fuel vaporized by the vaporizing element B 15 a B 3 1, a needle B 3 2 for opening and closing the hole of the nozzle B 3 1, a solenoid valve B 3 3 connected to the needle B 32 for moving the 21 dollar B 3 2, and a vaporizing element B 1 Fuel inlet B15b for supplying fuel to 5a, return oil piping B23 for sending fuel inside the carburetor B15 when operation is stopped, and heat recovery unit for recovering the heat of combustion of the burner B16 B 15 c.

The vaporizing element B15a is made by sintering fine ceramic particles into a cylindrical shape. The tar component generated when the material is vaporized is deposited from the surface of the vaporizing element B15a toward the inside.

The fuel inlet B15b of the vaporizer B15 has a double structure of an outer stainless steel pipe B34 and an inner copper pipe B22. The outside is made of a stainless steel pipe B34 in order to reduce the heat conduction from the carburetor B15 and suppress the temperature rise of the fuel entering the carburetor B15. In addition, the diameter of the stainless steel pipe B34 is made larger than that of the copper pipe so that the heat conduction from the stainless steel pipe B34 to the copper pipe is further suppressed. The tip of the copper pipe B22 extends to a position outside the vaporizer B15.

The solenoid pipe B33 includes an electromagnetic coil B33a wound in a coil shape, a movable piece B33b that can move in the axial direction together with the needle B32 inside the coil, and a solenoid coil B33. Suction piece B33c that sucks and moves movable piece B33b in the nozzle closing direction by excitation of 33a, and pressing spring B33d that urges movable piece B33b in the nozzle opening direction It is composed of

In the solenoid valve B33 of the above configuration, when the electromagnetic coil B33a is energized and de-energized, the movable piece B33b is attracted to and detached from the attracting piece B33c, and the movable piece B33 is moved. The twenty-one dollar B32 connected to b moves to open and close the hole of the nozzle B31 of the vaporizer B15.

The burner B16 is composed of a mixing pipe 16a for mixing the combustion gas vaporized by the vaporizer B15 with the primary combustion air, and a flame port B35 for burning the mixed combustion gas (Fig. 41). It is composed of

As shown in FIGS. 45 and 46, the parner box B 28 has a box shape that is open at the top and can accommodate the burner B 16, and has a burner on the bottom side. A substantially rectangular square hole for mounting the flange of the mixing tube B16 is formed, and mounting holes for the ignition heater B35 and the frame sensor B36 are provided on the side surface. A burner cover B37 is attached to the underside of this parner box B28. You. The burner cover B 37 has an inverted chevron shape, is provided below the burner B 16, and is fixed to the parner box B 28 with sound absorbing and heat insulating material attached to the inside to absorb combustion noise. However, the temperature of the parner itself is prevented from lowering.

45 and 46, the left and right ends and the back side are bent upward, the front side is bent obliquely downward, and a substantially rectangular center portion is formed. The upper opening edge of the parner box B28 is fixed around the square hole, and the combustion flame of the burner B16 passes through the square hole. Also, partition plate B

A plurality of mounting holes for the combustion chamber B 30 are provided around 29.

As shown in Fig. 45, the combustion chamber B30 surrounds the combustion flame of the burner B16 from all sides, and has an opening at the upper front side. Muroto B

It consists of 3 and 9.

The front B38 of the combustion chamber is bent left and right inward, the upper part is slightly inclined inward, and the lower side is bent outward and fixed to the partition plate B29. The B38 in front of the combustion chamber is made of a heat-resistant material so that it will not burn out even if abnormal combustion occurs.

The rear B39 of the combustion chamber has an inverted U-shape when viewed from the top, and the left and right front portions are bent inward to form a rim portion, which is attached to the front B38 of the combustion chamber. The upper part of the rear wall of the rear of the combustion chamber B39 is inclined inward, and the lower side is bent outward and fixed to the partition plate B29. Cut-and-raised pieces B39a and B39b are provided on the left and right side portions of the B39 after the combustion chamber, respectively, and a part of the wind from the convection fan B9 flows into the combustion chamber B30. However, the secondary combustion air is designed to improve the flammability and lower the combustion temperature.

The upper part of the back of the B39 after the combustion chamber is shaped to be extruded in an inward shape, and an air hole B39c is formed in that part, from the convection fan B9 arranged on the back side. A part of the air blown into the combustion chamber B30 flows as secondary combustion air to suppress the rise of the combustion flame. Both the inside and outside surfaces of the front and rear combustion chambers B38 and B39 are coated with heat-resistant paint or black to improve heat resistance. As shown in FIG. 45, the combustion section frame B 26 has an inverted U-shaped box shape, is disposed so as to surround the combustion chamber B 30, and receives indoor air from the convection fan B 9. The passage through which the air that has taken in and taken away the heat of the combustion chamber B30 is formed. The combustion section frame B26 is fixed to the table B5 on the left side and the rear side of the side back plate B7 of the main body B1 with a female screw. The combustion portion frame B26 has a slope B26a formed by cutting the upper front side diagonally, and a locking portion for fixing the louver of the outlet 2 is bent at the front portion. On the slope B 26 a, the combustion section B 25 incorporating the burner B 16 and the vaporizer B 15 is attached to the combustion section frame B 26, and the front B 27 of the combustion section frame is attached to the main body B 1. It can be mounted diagonally above the front part of.

B27 in front of the combustion part frame is for guiding the air sucked by the convection fan B9 to the outlet B2 on the front of the main unit B1, and the convection fan on the front side reduces the air volume for some reason An overheat prevention device is provided to protect the main body when the heat is applied. In addition, the structure of B 27 in front of the combustion section frame has a double structure to prevent local thermal effects.

As shown in FIGS. 47 and 69, the right side of the main body B 1 has a storage section 4 for opening and closing the lid B 4 on the upper surface of the main body B 1 to removably store the fuel tank B 12. a and a detection table B 40 (FIG. 69) which is disposed on the bottom side of the storage section 4 a and has one component of a fuel amount detection means B 69 and a water detection means B 70, which will be described later. The storage section 4a has a joint receiving section 100 on the combustion section side where the connection joint section B47 on the fuel tank side (FIG. 49) is detachably mounted when the fuel tank B12 is mounted on the main body. (Figs. 63 and 64).

The tank storage chamber 4a is partitioned by a tank guide B41 (Figs. 43 and 64) for guiding the refueling tank B12 when the tank is attached and detached. A tank guide fixing member B42 for fixing the joint receiving portion 100 is attached to the obliquely cut portion at the right front of the tank guide B41 (Fig. 64). The storage room 4a eliminates the conventional fuel tank, so that the capacity of the fuel tank can be allocated to increase the capacity of the refueling tank or to reduce the capacity of the main unit. There is an advantage that the pace is reduced and space is not required.

As shown in Fig. 47 and Fig. 69, the shape of the insertion part including the tank outlet 4b of the storage part 4a is a little larger than the shape as viewed from above the The left side is approximately vertical to the front and rear sides of the main unit B1, the right side is approximately vertical to the front and rear sides of the main unit B1, and the front and rear corners are both It has an R shape. At the right front corner, as described above, a tank guide fixing member B2 that supports the connection joint receiving portion 100 on the combustion portion side is spaced a fixed distance from the upper surface B8 of the main body B1. It is located below.

[Composition of refueling tank]

FIG. 48 is a perspective view of the fuel tank B12 as viewed from the rear side, and FIG. 49 is a schematic view showing a connection joint on the fuel tank side. As shown in the figure, the lubrication tank B 1 2 is composed of a substantially flat lubrication tank left member B 12 a and a lubrication tank right member B 1 2 press-formed into a container shape with a U-shaped cross section and an open left side. b is joined by adrian processing to form a substantially rectangular parallelepiped shape, which is substantially rectangular when viewed from the top side, and the front and rear corners on the right side are R-shaped.

For this reason, when inserting the refueling tank B12 into the storage part 4a, if you try to enter the storage chamber 4a with the left and right turned upside down, the right and left R-shaped front and rear of the tank outlet 4b The right and left corners of the refueling tank right member B12b hit a part of the tank so that the tank B12 cannot be inserted.

On the lubrication tank right member B1 2b side, a handle consisting of a metal ring B43b attached to the upper surface of the tank so that it can be raised and lowered and a resin grip B43a fixed to the center of the tank B 4 3, a fuel inlet B 44 formed on an inclined surface B 12 c formed by connecting the three sides of the both sides and the upper surface, and a closing means B 1 for closing the fuel inlet B 44 9 are provided.

An oil meter for visually checking the fuel level in the fuel tank B 12 is provided on a side surface near the closing means B 19, and a side surface near the oil meter, that is, a tank right member A concave portion B12g is formed in which the right front corner is depressed inward, and a connection joint portion B47 on the refueling tank side is fixed to the concave sound B12g. The connection joint portion B47 is fixed to the recess B12g of the refueling tank so that it does not protrude outward from the substantially rectangular sunset projection surface. It fits in storage room 4a.

On the bottom side of the refueling tank B12 (Figs. 48, 60), a water receiving tray B71 (Fig. 48, 60), which is a component of the water detecting means B68 for detecting water in the tank B12, is provided. In order to protect the water tray B71, a tank leg B50 (Fig. 48) projecting downward is welded and fixed around the periphery thereof.

As shown in FIGS. 50 to 55, a small air hole B51 (having a diameter of about 1.5 mm) is formed on the upper surface side of the refueling tank B12. The inside of 2 is kept from becoming negative pressure. The air hole B51 also has measures to prevent fuel from spilling out of the refueling tank when carrying it, and the fuel in the refueling tank B12 from the air hole even if the refueling tank falls. It is desirable to take measures to prevent it from coming out, and to take measures to make the oil tank open or closed depending on whether or not the oil tank is attached to the main body. Can be adopted.

That is, the embodiment 1 of the air hole closing means B 52 for preventing the fuel from spilling out of the fuel tank from the air hole B 51 when carrying the fuel tank is as shown in FIG. 54. 51 A fuel scattering prevention plate 301 surrounding the inner surface of 1 and a communication hole 3 formed on the bottom side of this scattering prevention plate to communicate with the inside of the tank at a position deviated from the position directly below the air hole B 51 0 2.

The shatterproof plate 301 is formed in a dish shape so as to surround the air hole B51 and is welded to the inner surface of the tank, and the bottom surface thereof is formed with a slope so that the deepest portion of the slope surface is formed. A communication hole 302 is formed at the bottom, and an air hole B51 is disposed immediately above the shallowest part. In the above configuration, even if the fuel is supplied to the refueling tank B12 and the user carries the handle B43, the fuel enters through the hole 302 of the fuel scattering prevention plate 301. The internal volume of the shatter-prevention plate 301 serves as a cushion, and fuel may accumulate inside the shatter-prevention plate 301 or be discharged from the communication hole 302, so carry the refueling tank B122 and carry it. No fuel can escape from the air hole B51.

As an embodiment 2 in which the fuel in the fuel tank B12 does not leak from the air hole B51 even if the fuel tank B12 falls, the air blocking means C5 as shown in FIG. 2 can be exemplified.

That is, in the second embodiment, the holding plate 310 having the air hole B51 formed on the top surface is tightly attached to the opening 3200 formed on the upper surface of the fuel tank B12 by the O-ring 314. The air blocking means C 52 includes a guide guide 3 13 arranged on the inner surface side of the air hole B 51, and a spherical weight 3 1 mounted inside the guide guide 3 13 so as to be able to move up and down. 2 and a closing plate 3 1 1 interposed between the weight 3 12 and the air hole B 5 1 and closing the air hole B 5 1 following the vertical movement of the weight 3 12 .

A plurality of locking means 3 15 are provided on the side surface of the holding plate 3 10 for mounting to the oil tank B 12 at intervals in the circumferential direction, and a cylindrical guide guide with a bottom is provided inside. Screws 3 2 2 are screwed for screwing. The locking means 3 15 is formed of a wedge-shaped hook projecting outward in the radial direction, and the hook 3 15 is adapted to engage with an edge portion 3 21 projecting from the tank opening edge.

The obstruction plate 3 1 1 is for closing the air hole B 5 1 and is part of the peripheral corner of the top surface.

16 is the R surface, and has a shape that makes it easy to move inside the guide guide 3 13. In addition, the peripheral corner of the bottom surface of the closing plate 311 may be an R surface.

The guide 311 has a cylindrical shape with a bottom, and its inner bottom surface is formed with an inclined tapered surface 317 with the center at the lowest position to move the rolling weight 312. A hole 319 through which air flows is formed through the bottom of the surface 317. In addition, the guide guide 3 13 is formed on the inside of the holding plate 3 10 on the outside of the upper side surface. A screw 3 2 3 for screwing with the female screw is formed. A plurality of grooves 318 are formed on the taper surface 317 from the upper portion to the lower hole 319, and serve as a passage for air to flow when the refueling tank B12 is upright. The tapered surface 3 17 is set at an angle at which the air hole B 51 can be closed by the rolling of the rolling weight 3 12 and the accompanying upward movement of the closing plate 3 1 1 when the oil tank B 12 falls. Have been.

In the above configuration, when the refueling tank B 1 2 falls down, the rolling weight 3 1 2 rolls on the taper surface 3 1 7 on the bottom of the guide 3 13, and while rolling on the side surface, the rolling weight 3 1 2 Push the obstruction plate 3 1 1 toward the air hole B 5 1 to close the air hole B 5 1 with the obstruction plate 3 1 1 so that the fuel in the refueling tank B 1 2 does not leak from the air hole B 5 1. Become.

When the refueling tank B12 is in the upright state, the rolling weight 312 is located on the taper surface 317 on the bottom of the guide 311 due to its own weight, but is formed on the tapered surface 318. Due to the groove 3 19 formed, the hole 3 19 communicating with the inside of the refueling tank and the air hole B 51 communicate with each other, so that the inside of the tank does not become negative pressure.

In the third embodiment of the air hole opening / closing means (D52), the air hole B51 is opened / closed depending on whether or not the oil tank B12 is attached to the main body. That is, as shown in FIGS. 49 to 51, the air hole opening / closing means D 52 is a valve that opens and closes the air hole B 51 of the oil supply nozzle B 12 3 so that it can be opened and closed. , A tank valve lever 3 3 1 equipped with a valve 3 30, a lever cover 3 3 2 for storing the tank valve lever 3 3 1, and a movable rod for moving the tank valve lever 3 3 2 up and down 3 3 3 and a lever spring 3 3 4 for urging the movable rod 3 3 3 up and down.

The tank valve lever 3 3 1 has a convex portion 3 3 5 at the mounting portion of the valve 3 3 0, and has a Z-shaped end at one end to function as a fulcrum 3 3 6, and a movable rod 3 3 3 at the other end A joining hole 3 3 7 is formed. The joint hole 337 has a shape that allows a margin when joining with the movable rod 333.

The lever cover 332 has a recess for accommodating the tank valve lever 331. One end of the concave portion is opened, and the other end is closed to form a receiving slit hole 338 of the fulcrum 3336 of the lever 3311. A screw hole 339 for fixing the cushion cover 120 of the connection joint portion B47 (FIG. 49) is provided at one end on the open side of the concave portion.

The movable rod 3 3 3 raises and lowers the tank valve lever 3 3 1, and penetrates a vertical hole 3 4 0 4 formed in the center of the joint body B 5 5 of the connection joint section 4 7 It is possible to move to.

The valve 330 has a pin-shaped valve element 341, which moves up and down the air hole B51 of the lubrication tank B12, and a sealing gasket 343 attached to the root of the pin. Is provided. Note that the air hole B51 is formed above a spherical portion 343 formed on the upper surface of the fuel tank B12 so as to protrude outward.

In the above configuration, in order to incorporate the air blocking means D52 into the connection joint B47, a movable rod 333 fitted with a lever spring 334 in the central vertical hole 3400 of the joint body B55. Insert the Z-shaped fulcrum 3 3 6 of the tank valve lever 3 3 1 into the slit hole 3 3 8 of the storage section of the lever 3 3 2 while inserting the tank valve lever 3 Connect the upper end of the movable rod 3 3 3 to the hole 3 3 7 on the other end side of 3 1 with a speed nut and assemble.

When the refueling tank B12 is mounted on the main body B1, the lower end abutment seat 350 of the movable rod 333 mounted on the connection joint part B47 of the refueling tank B1 When it comes into contact with the upper rib of the packing retainer 103 of the connection joint receiving part 100, the movable rod 33 is pushed upward by the rib, and the tank valve lever 33 follows this. 1 also swings upward, and the valve 3 3 0 attached to the tank valve lever 3 3 1 also rises at the same time, so the valve 3 3 0 and the lubrication tank B 1 2 The spherical hole 3 4 3 Air hole B A gap is created between the oil tank and the oil tank B1, and air flows from the air hole B51 into the oil tank B12, and the internal pressure of the oil tank B12 is always at atmospheric pressure (Fig. 51). .

At this time, be sure to join the connection joint B 47 on the oil tank side with the combustion section side. Before connecting the contact receptacle 100, the movable rod 3 33 of the air hole D 52 contacts the top rib of the packing retainer 103 of the joint receptacle 100 before the air hole B is closed. 5 By setting the vertical position so that 1 is in the open state, even if it is connected to the main unit with high pressure inside the lubrication tank, problems such as leakage at the connection means are prevented. You.

When the fuel tank B 1 2 is taken out from the main body B 1, the movable rod 3 3 3 attached to the connection means of the fuel tank B 1 2 is replaced by the packing retainer 1 0 of the combustion side connection joint receiving section 100. The movable rod 3 3 3 is forcibly moved downward by the urging force of the lever spring 3 3 4 because the one that was in contact with the upper rib of 3 is released, so it is attached to the evening valve lever 3 3 1 The valve 340 is also lowered at the same time, and the air hole D51 is closed. Therefore, air does not flow from the air hole B51 into the fuel tank B12, and even if the fuel tank B12 falls, fuel in the fuel tank B12 does not spill.

In addition, since the spherical portion 3 43 where the air hole B 51 is formed is a convex portion upward, dust and dirt hardly accumulate, and trouble during long-term use is eliminated.

Next, as shown in FIGS. 49, 52 and 53, the fourth embodiment of the air hole closing means (E52) has a concave portion formed on the upper surface of the refueling tank B12. An air hole B 51 is formed at the bottom of 3 4 8, and a valve 3 3 0 that opens and closes the air hole B 5 1 is opened and closed by the air hole B 5 1 of the lubrication tank: B 1 2 It comprises a pin-shaped valve element 346 at the tip and an O-ring 346 for sealing mounted at the base of the pin. Other configurations are the same as those of the third embodiment.

In the above configuration, since the concave surface portion 348 where the air hole B51 is open is a concave portion below, dust and dirt easily accumulate, but the dust and dirt are accumulated in the valve body 34 of the valve 330. The pin at the tip of 5 moves up and down to remove dust and dirt, so there is no trouble in opening and closing the air hole B51. ^ The concave portion is formed by the convex spherical portion in the third embodiment. There is an advantage that the mold structure is simpler than forming. In the third and fourth embodiments, the tank valve lever 331 is forcibly biased in the valve closing direction by using the lever spring 3334, but the lever spring 3334 is used. Instead, it is also possible to adopt a method of closing the valve simply by using the weight of the tank valve lever or the movable rod 333. In the third and fourth air hole closing means D 52 and E 52, the movable rod 33 33 is vertically movably penetrated through the connection joint portion B 47, and the connection means is provided when the fuel tank is mounted. The air holes are opened before the connection is made, and these are installed in the same place to reduce the size of the device.However, the air hole closing means is installed in a place different from the connection joint. Then, the air hole may be opened before the connecting means is connected. In this case, the contact position of the movable rod may be set so as to contact a member different from the connection joint receiving portion on the main body side.

(Composition of connection joint)

FIG. 56 is a cross-sectional view showing a joint B 13 a on the oil supply side of the connection joint, FIG. 57 is an exploded perspective view showing a connection state of the connection side with the suction pipe B 20 on the tank side, and FIG. FIG. 8 is a sectional view showing the joint B 17 a on the return oil side, and FIG. 59 is an exploded perspective view showing a connection state with the piping B 63 on the tank side.

As shown in FIG. 49, the connection joint B 47 on the tank side is an integral combination of the connection joint B 13 a on the oil supply side and the connection joint B 17 a on the return oil side. As shown in Figs. 56 and 59, each connection joint B13a and B17a has a joint body B55, a valve mechanism B56, and a valve presser B57. The base flange B55d (Fig. 56) of each body B55 is connected to each other and integrally formed. This connection joint part B47 is located in the concave part B12g (Fig. 48) formed in the right front corner part of the side face of the refueling tank B12, and is packed with the joint holding plate B54. It is fixed to the bottom surface of the concave portion B12g of the refueling tank B12 via the screw B54f via B53.

As shown in Fig. 56 and Fig. 58, each joint body B55 protrudes from the cylindrical body B55a on the distal end side and from each body B55a toward the refueling tank side. Tubular Are formed of synthetic resin from the protruding portions B 55 e and B 55 f and a proximal flange B 55 d protruding radially outward at an intermediate portion of the protruding portion B 55 e. The proximal flanges B55d of both connection joints B13a and B17a are connected to each other and integrated.

The torso part B55a has a cylindrical tapered part (closed surface) B55b whose diameter gradually decreases downward from the lower end, and a lower part of this taper part B55b. A cylindrical portion B55c maintaining a predetermined diameter and a predetermined length is integrally formed continuously, and a valve mechanism B56 is provided therein.

Each valve mechanism B56 housed in the cylindrical body B55a has a lubrication tank B12, a lubrication tank B12, a lubrication path B to the electromagnetic pump B14, and a carburetor B15 with a lubrication tank. Return to B12 This is for shutting off the oil path C so as to be able to open and close, and is composed of a valve element B59, an O-ring B60 for the valve element, and a valve element spring B61.

The valve body B59 has a shape substantially similar to the funnel-shaped internal shape of the body B55a, the tapered portion B55b, and the cylindrical portion B55c of the joint body B55, and The body B55 is shaped so that it can reciprocate inside. That is, the valve body B59 has a substantially conical plug portion (closing surface) B59b, and is connected to the lower end of the plug portion B59b and is thinner and longer than the cylindrical portion B55c. It has a columnar movable part B59a, and an annular O-ring packing B60 is tapered to the tapered part B55b of the joint body B55 on the tapered part of the plug part B59b. It is provided so that it can contact.

The length of the movable part B59a is determined by the distance between the stopper B59b and the tapered part B55b of the main body B55. 0 is a valve-closed state in which the inside of the taper portion B55b is tightly closed, and the length is set so that the tip protrudes more than the cylindrical portion B55a.

The valve retainer B 575 has an upper hole in the cylindrical body B 55 a that is tightly closed via an O-ring B 588, and the back surface of the valve retainer B 557 is designed to easily receive the valve spring B 61. An annular concave groove is formed. The valve body spring B61 is mounted on the body B55a, and is interposed between the valve retainer B57 at the upper end and the plug B59b of the valve body B59, and the valve body B59. Is biased in the valve closing direction.

The proximal flange B55d extends radially outward to integrally connect the joints B13a and B17a, and is formed in a substantially rectangular plate shape. An annular joint packing B53 is fitted and fitted inside the flange B55d so as to prevent fuel leakage from around the protrusions B55e and B55f.

The protruding portions B55e and B55f on the tank side are formed in a tubular shape, and the inner side of the base flange B55d is filled with oil. The suction pipe B20 and the end of the return pipe B63 are connected to the internal passage of the suction pipe B20. The level of this internal passage is located above the level of fuel filling in the refueling tank, so that the fuel in the tank does not inadvertently flow toward the body B55a.

As shown in Fig. 56 and Fig. 58, the internal passages of the protrusions B55e and B55f have a diameter that allows the suction pipe B20 and the return pipe B63 to fit inside. It is formed to have a large diameter that allows the pipe fixing member to be fitted from the middle of the passage to the inside of the tank, and the step between the large-diameter passage B55q and the small-diameter passage B55s at the outer end side. In the section B55r, the tie-down sections B20a and B63a (Figs. 57 and 59) of the suction pipe B20 and the return pipe B63 can be positioned. The small diameter passage B55s (Fig. 58) communicates with the valve chamber of the body B55a.

On the inner end side of the protruding portions B55e and B55f, slit holes B55g and B55m are formed that penetrate in the radial direction. It is set. On the inner peripheral surfaces of both sides of the slit hole B55g and B55m, the tie-down portion B65a of the retaining member B65 of the suction pipe B20 and the return pipe B63 is engaged. Insertable grooves B55j and B55n (Fig. 59 (b)) are formed.

As shown in Fig. 57, the dimensions in the tank of the projecting part B 55 e on the oil supply side are It is set shorter than that of the protruding portion B55f (the 59th (a)) on the return oil side, so that the suction pipe B20 can be easily connected.

The suction pipe B20 is formed in an inverted L shape, the upper horizontal part is connected to the oil feed joint B13a (Fig. 41), and the lower end of the vertical part sucks the fuel in the fuel tank B12. In order to raise it, it reached near the bottom of oil tank B12 and was connected to suction port B66 (Fig. 60). At the end of the horizontal portion of the suction pipe B20, a flange-shaped tie-down portion B20a (Fig. 57) for positioning the 〇 ring when connecting with the connection joint portion B47 is provided. Is formed.

The protruding portion B55f (Fig. 59) on the return oil side is formed longer than the protruding portion B55e (Fig. 57) on the oil supply side, and slit holes B55k above and below it , B 55 m are formed. Of the upper and lower slit holes B 55 k and B 55 m, the upper slit hole B 55 k is set larger than the lower slit hole B 55 m, and the inner diameter is returned and the outer diameter of the pipe B 63 Formed with slightly larger dimensions, with a hole inside to insert the return pipe B63, and a threading groove to lock the threaded part B65a of the pipe fixing member B65 toward the outside. B55n is formed.

The return pipe B63 is used to return the fuel from the carburetor B15 to the fuel tank B12. The return pipe B63 is bent into an L shape in the fuel tank B12, and the pipe outlet B63b faces upward. It is arranged facing. This is because even when the fuel in the refueling tank B12 rises abnormally due to the temperature difference, the pipe outlet B63b protrudes above the fuel level in the refueling tank B12. This is to prevent accidental leakage to the combustion section.

As means for fixing the suction pipe B20 and the return pipe B63 in the protruding parts B55e and B55f so that they cannot be removed, a C-shaped cross section as shown in Figs. 57 and 59 A pipe-shaped fixing member B65 is provided. The pipe fixing member B65 has a protruding portion B55e on the outer surface thereof, and a flange-shaped tie portion B65a that can be engaged with the inner surface insertion groove B55j and B55n of the B55f. Is formed, and a slit hole B65b is formed in one direction. Is formed to be slightly smaller than the outer diameter of the suction pipe B20 and the return pipe B63. The material of the joint body B 55 is not limited to resin, but may be metal.The cross-sectional shape of the body B 55 a, the tapered part B 55 b, the cylindrical part B 55 c, etc. Etc. are not limited to circular shapes.

Joint holding plate B5 that fixes connection joint B47 to lubrication tank B12

As shown in FIG. 56, the metal piece 4 is formed by cutting and raising the center of the metal plate to the upper side to form a cut and bent piece B54a. The cut-and-raised piece B 5 4a is connected to the connection joint B 1

The valve retainer B57 of 3a and B17a is pressed from above to hold the valve body B55a out of the body B55a. A relief hole B 5 4 b is formed in the center of the cut and raised piece B 54 a to penetrate the projecting portions B 55 e and B 55 f of the connection joints B 13 a and B 17 a, The periphery of this relief hole B 5 4 b is a peripheral holding part B 5 4 d with a rib B 5 4 c that holds the periphery of the connection joint part B 47, and the lower center of the relief hole B 5 4 b From the part, a center holding part B54e is extended between both connection joints B13a and B17a.

The peripheral edge pressing portion B54d and the central pressing portion B54e are fixed to the refueling tank B12 with screws B54f together with the proximal flange B55d of the connection joint portion B47. The joint hole B 54 e and the center holding part B 54 e

4 Prevents misalignment of 7 on the left and right.

As shown in FIG. 49, the connection joint B 47 has an L-shaped cross section to prevent the connection joint B 47 from coming into contact with other members when the fuel tank B 12 falls. The shape of the cushion cover 120 is covered from the upper surface of the oil tank B12. The outer surface of the cushion cover 120 has a flat guide surface 120a, and the protective cover 1 1 1 (see FIG. 66) covers the air valve B 18 (FIG. 66) of the connection joint receiving portion 100. (See Fig. 68 (b)) The guide surface 1 1 1a (Figs. 65 and 66) formed on the opposite surface of the lubrication tank functions as a guide when mounting the refueling tank to the main body. It has become. At the suction port B66 (Fig. 60) at the lower end of the vertical part of the suction pipe B20, a cord is formed at the side connection part in the same manner as the connection part with the connection joint part. Is connected. The suction port B666 is formed in a substantially cylindrical shape and has a plurality of feet at the lower end, so that a stainless steel mesh filter B666a is simultaneously processed at the base and inscribed, and A pair of slit holes B66b for connecting the suction pipe B20 are formed facing each other, and the suction pipe B20 is connected to the upper end thereof.

As shown in Fig. 60, the suction port B66 is attached to the hole of the suction port fixing plate B67 of the lubrication tank B12 so that it cannot move, and the suction port B66 is connected to the lubrication tank. It does not collide with the inner wall inside B12.

In the above configuration, lubrication tank B12 has connection joint B47 and suction pipe B

The procedure for assembling 20 and the return pipe B63 is as follows. After pressing the left and right members B12a and B12b (Fig. 48) of the fuel tank, press the left member B12a of the fuel tank. , And right Before the adriang processing for joining the members B1 2b, the joint B4 is connected to a predetermined position of the lubrication tank right member B12b via a packing B53 (FIGS. 56 and 58). 7 is fixed with joint holding plate B54 and screws.

At this time, the valve retainer B 57 of the joint is pressed from above by the cut-and-raised piece B 54 a of the joint press plate B 54, so that the valve retainer B 57 is a cut-and-raised piece B of the joint press plate B 54. 5 4a keeps the connection joint B 47 without jumping out.

Projecting part B of joint body B5 5 from inside lubrication tank right member B1 2 b

To insert and fix the suction pipe B20 and the return pipe B63 in 55e (Fig. 56) and B55f (Fig. 58) respectively, insert the suction port B66. After assembling into the suction pipe B20, fit the O-ring B64 at the end of the tie-down part B20a (No. 57 (a)) of the suction pipe B20, and joint body B55 Into the protruding part of B5 5e. After that, the pipe fixing member B65 is inserted into the slit B65b of the suction pipe B20 on the suction port side of the suction pipe B20a, and the connection joint B47. Push to the side Then, push the stringing portion B65a of the pipe fixing member B65 into the inside stringing groove B55j of the protrusion B55e. Then, the pipe fixing member B65 is reduced in diameter, and the suction pipe B20 is fixed to the protruding portion B55e, so that it is possible to prevent the suction tube B20 from coming off from the connection joint portion B47.

The method for fixing the return pipe B 6 3 (Fig. 59) is as follows.

3 When the 0 ring B64 is fitted to the end of a, and when it is fitted into the protruding part B55f hole of the joint body B55, the protruding part B55 of the main board B55 slit hole B5 When the return pipe B63 is passed through the larger side of 5k, the return pipe B63 is arranged upward. After that, insert the pipe fixing member B65 from above the return pipe B63 from the slit hole B65b and push it into the protruding part B55f, so that the tie part B of the pipe fixing member B65 When 6 a is pushed in until it is inserted into the inner ridge groove B 5 5 η of the protruding portion B 5 5 、, the pipe fixing member Β 65 is reduced in diameter, and the return pipe Β 63 is protruded. It is fixed to 55 f and can be prevented from coming off from the connection joint B 47.

As described above, when connecting the suction pipe B20 and the return pipe B63 to the connection joint B47, the connection can be easily performed without welding using the pipe fixing member B65. It is suitable for use in places and places where the assembly processing space is small, and the parts can be disassembled, so maintenance costs are low.

FIG. 60 is a sectional view showing the bottom side of the refueling tank B12. As shown in the figure, on the bottom side of the refueling tank B12, a water detection means B68 that detects the water generated in the refueling tank and the amount of fuel in the refueling tank B12 are detected. A fuel amount detection means B69 is provided.

The water detecting means B 68 is composed of a conductive water tray B 71 provided on the bottom of the conductive tank for storing water, an electrode B 72 in contact with the water tray B 71, and an oil tank B A water-tight packing B 74 as an insulator for electrically insulating the water-receiving tray B 71 1 and the lubrication tank B 12 2 from each other; Water is detected based on the difference in electrical resistance between the water stored in the fuel and the fuel.

The water receiving tray B71 is formed separately from the tank B12 using stainless steel plate to prevent the occurrence of cracks. The taper has a downward tapered shape, and a peripheral flange B71a extending radially outward is formed on the outer peripheral portion thereof. The flange B71a is formed on the bottom mounting hole B1 of the fuel tank B12. It is attached to 2d via rubber packing B74. In addition, the water receiving tray B71 is applied to the inner and outer surfaces of the non-conducting paint from the outside of the contact area with the electrode B722, causing a malfunction in the state where water remains. In order to perform accurate and accurate water detection.

The packing B 74 is made of an elastic non-conductive material interposed between the peripheral wall of the bottom mounting hole B 12 d of the oil tank B 12 and the peripheral flange B 71 a of the water receiver MB 71. The flange B71a of the water tray B71 is sandwiched from above and below. The packing B 74 is fixed around the tank mounting hole B 12 d by a ring-shaped holding member B 75 and a screw B 76 arranged on the lower surface thereof, so that the water receiving tray B 71 is It is fixed to B12d in a watertight state.

The rubber packing B74 is made of a non-conductive, oil-resistant, and water-retaining rubber member. Specifically, oil-resistant NBR (acrylic nitrile butadiene rubber) or the like is used. Fluororubber excellent in water repellency is used. In particular, if the packing B 74 has poor water repellency, water will accumulate and water will remain in the packing B 74 and the metal part of the oil tank B 12 even after draining, which may cause malfunction. In this embodiment, since a rubber material having water repellency is used, accurate and accurate water detection can be performed.

The electrode B 72 on the water receiving tray B 71 side and the electrode B 73 on the tank side are both attached to a detection table B 40 outside the oil tank B 12. The electrode B 72 on the water tray B 71 side projects from the bottom wall of the water tray receiving recess B 40 a of the detection table B 40 toward the tank B 12 side. In the state where the tank B12 is placed, the needle-shaped electrode or the electrode having a line contact shape is in contact with the outer surface of the water receiving tray B71.

The evening-side electrode B73 is exposed to the outer mounting table B40b of the detection table B40, and the needle that comes into contact with the bottom surface B12f of the tank B12 when the evening-bed B12 is placed. Electrode. By connecting both electrodes B 7 2 and B 7 3 to the power supply, the power supply allows the water tray side electrode B 72, water tray B 71, fuel or water on the inner surface, tank bottom B 1 2 f, tank side power supply. An electrical closed circuit is configured to the pole B733 and the power supply, and the presence of water can be detected by the difference in the electrical resistance of the liquid (fuel or water) inside the water pan B71. I have.

The hole wall of B 1 2d is bent downward, and the bent portion B 1 2d is formed at a plurality of circumferential locations at intervals, and has a narrow, sharp-edged needle portion B 1 The needle portion B12e functions as a tank-side tip electrode, and is electrically connected to the tank-side electrode B73 with the tank bottom surface as a conductive path.

The suction port B66 for sucking up fuel from the tank B12 is located above the needle section B12e so that the water in the internal water receiving section of the water tray B71 is not directly sucked. I have to. In addition, water was left on the packing B 74 and the metal part of the refueling tank B 12 2 by coating the bottom of the water receiving tray B 71 except for the inside and outside with a non-conductive paint. Even if it becomes a state, it does not cause a malfunction. In addition, by covering the inside of the refueling tank B12 with a non-conductive paint, etc., from the inside of the tank B12 above the suction port B66 that sucks up fuel, other than the water detection method using electricity The harmful effects of water in the system can be prevented.

As shown in FIG. 48, a tank leg B50 for guarding the water tray B71 is welded to the bottom of the fuel tank B12, as shown in FIG. The shape of the tank leg B50 is higher than the bottom of the tank to be welded to the refueling tank B12, and the height of the rib or U-shaped leg B50a is higher than the height of the water receiving tray. Are formed at the left and right ends.

For this reason, when the oil tank B12 is taken out from the main body B1 and the oil filler port B24 is turned upward to refuel, it comes into contact with the bottom surface of the oil tank B12 and the water receiving tray B71 side Even if there is foreign matter on the surface, it is protected from scratches and dents to prevent water detection from malfunctioning.

As shown in Fig. 60, the fuel amount detecting means B69 is composed of a float B77 with a magnet B78, which is disposed inside the tank B12 and functions as a detected part, and a magnet B78. A reed switch B79 is provided on the side of the detection table B40 facing the float B77 so as to be turned ON / OFF in accordance with the approach / separation of the float B77.

The float B77 is mounted inside a water-permeable tubular guide B80 with a canopy so that it can move up and down as the fuel level fluctuates, with the magnet placed on the lower side. The lower end surface of B80 is integrally fixed to the inner surface side of water tray B71 of water detecting means B68.

The reed switch B79 is fixed to the lower surface of the central recess of the detection base B40 so as to face the float B77. Guy B80 protects the commercially available refueling hose from contacting the float B77 when draining the fuel from the refueling tank B12, and inside if it is metal-worked Has been processed to prevent burrs.

Therefore, when the fuel inside the refueling tank B12 decreases and reaches a certain liquid level, the reed switch B79 senses the magnets of the float B77 and the operation is controlled by the controller B8. 0, and the display section B 81 can notify the running out of fuel and the like. The tank leg B50 (Fig. 48) is made by pressing a plate-shaped member, has a hole for the water receiving tray B71 in the center, and U-shaped The leg B50a is formed long in the front-rear direction, and a portion corresponding to the rear side of the main body has a tank receiving surface B50d for receiving the lever of the tank mounting detecting means B70 (FIG. 69). Are formed in a substantially Z-shape. This tank leg B50 is welded to the bottom side of the oil tank B12. Fixed in state.

FIG. 61 is a cross-sectional view of the tank filler port. As shown in the figure, the refueling tank B12 has an inclined surface B12c with a slope of at least 30 degrees downward from the tank upper surface between the upper surface and two adjacent side surfaces. The lubrication port B44 is disposed on the inclined surface B12c. The refueling port B44 has a base portion B44a protruding outward from the inclined surface, and the opening of the base portion B44a is openably and closably closed by a rotary lid member.

Refueling nozzle B12 The refueling port closing means B19 of the refueling port B44 has a hole that fits into the refueling port B44, and is spot-welded to the inclined surface B12c to be integrated. Fixing plate B82, a standing piece B82a on the Z-shaped portion cut and raised on the upper handle side of the fixing plate B82, and a fixing angle 1 6 welded to the standing piece B82a. A movable plate B833 supported so as to be freely openable and closable at 0, and a packing member B84 with a packing B84, which is disposed on an inner surface side of the movable plate B833 and closes a base B44a of a filler port B44. Coil member B 85 interposed between the cover member B 85 and the inner surface of the movable plate B 83 to press the cover member B 85 toward the base B 44 a of the oil filler port B 44. 86, a locking means B 87 for holding the movable plate B 83 in the refueling closed position, and a releasing knob 16 1 for releasing the locking means B 86.

The fixing plate B82 is formed from below the inclined surface B12c to near the upper surface of the tank. The movable plate B83 is provided with a rotation fulcrum B88 on the upper surface side of the tank and a locking means B87 disposed on the open end side. When the main body is mounted, the movable plate B83 will be opened. However, the movable plate length is set so that the open end of the movable plate cannot be opened by contacting the evening guide B41.

The lid member B85 is formed in a deep dish shape, and its outer end flange B89 cannot escape from an annular stopper member B90 formed on the inner surface of the movable plate B83. It is movably locked in a direction perpendicular to the plate surface of No. 3. The packing B84 is an annular member fitted from the outer peripheral portion of the outer end flange of the lid member to the surface of the concave portion. The base B44a is pressed against the upper edge. The spring member B86 is disposed in an internal space between the movable plate B83 and the lid member B85.

The locking means B87 is located at the open end opposite to the pivot B88 of the movable plate B83, i.e., at the lower end of the inclined surface B12c and in the tank accommodation chamber. A hook-shaped locking lever B 93, which is disposed on the tank guide B 41 side and is rotatably supported around the shaft B 91 on the open end side of the movable plate, and the locking lever Lock the pin-shaped lock receiving portion B 94 provided on the fixed plate B 82 and the locking lever B 93 so as to engage with the B 93 and hold the movable plate B 83 in the closed position. And a lever panel B95 that urges in a direction to engage with the receiving portion B94.

The lever spring B95 is wound around the rotation axis B96 of the locking lever B93, one end of which is locked to the cut-and-raised piece B93a of the locking lever, and the other end of which is the movable plate B83. A coil-shaped spring member locked to the stopper member B90 of the present invention, which is disposed on the inner surface side of the locking lever B93, and the locking lever B93 is set to be higher than the movable plate B83. It is configured to bias inward.

The locking lever B 93 has a knob 16 1 formed on its outside, and the back of the knob 16 1 is opposed to the tank guide B 4 1 in the locking position of the locking lever B 9 3, There is a small gap between the two to make it impossible to insert a finger to release the locking lever. Then, even if the user tries to release and rotate the locking lever B93 with the tank mounted, the knob 1631 of the locking lever B93 comes into contact with the tank guide B41 on the wall of the tank storage chamber. The lock lever B93 is configured to prevent the rotation release of the lock lever B93. The locking lever knob 1 61 is disposed on the outer surface side of the locking lever B 93 as shown in FIG. 62, and is integrally formed of resin in almost the same shape as the shape of the locking lever B 93. An R-shaped recess 162 is formed on the lower side so that the finger can be inserted, and it is shaped so that it can be gripped by the fingertip on both sides 163. Fine irregularities are formed so as not to slip. Note that the lever knob 16 1 has a plurality of pins provided inside thereof and is welded to the locking lever B 93. In the above configuration, if the locking lever knob 161 (locking lever B93) is pulled outward in the locked state of the locking lever B93, the urging force of the spring member B955 is resisted. As a result, the hook part is disengaged from the locking receiving part B94, and the locking of the filler opening closing means B19 is released. When the tank B12 was attached to the main body, the refueling port B44 was set on the inclined surface B12c, and the lever knob B963 was provided with a lever knob 161, so that the Even if you try to release the stop lever B 9 3, you can't put your hand in the gap between the knob 16 1 and the tank guide B 41, so release the locking lever B 9 3 I can't do that. Therefore, unless the fuel tank B12 is taken out of the main body, refueling cannot be performed, and refueling into the main body B1 can be prevented.

In the above embodiment, the example in which the locking lever is arranged on the movable plate side is shown, but a configuration in which the engagement lever is arranged on the fixed plate side may be adopted.

Fig. 63 is a front view of the tank guide fixing member, Fig. 64 is an exploded plan view showing the positional relationship between the tank guide and the joint receiving part, and Fig. 65 is an oil supply pipe and return oil pipe and a joint receiving part. Fig. 66 is a sectional view of the oil supply joint receiver, Fig. 67 is a sectional view of the return oil joint receiver, and Fig. 68 (a) is a plan view of the rising passage. (B) is a longitudinal sectional view of the air valve, and FIG. 69 is a plan view of the detection table.

As shown in FIG. 69, four surfaces around the storage section 4a of the refueling tank B12 are surrounded by a tank guide B41. As shown in FIG. 69, this tank guide B41 is formed in a rectangular frame shape in plan view in which only a central portion on the back side is opened by bending a metal plate material, and the left and right opening edges on the rear side are L-shaped on the outside. The upper part of the bent part B41c is hooked on the back part of the main body side back plate B7 with a hook, and the lower part is fixed with screws. A tank mounting detecting means B70 is arranged below the rear side opening B41d.

The lower side of the tank guide B41 is arranged along the inside of the left and right vertical walls B40s of the detection base B40, and the front side is also the front wall and the boss B40j of the detection base B40. Outside It is arranged between the rear boss B 40 j and the rising wall B 40 k, and the lower front and rear ends are secured by screws to the detection table B 50 (FIG. 70). .

The right corner of the tank guide B41 (Fig. 64) was cut and raised outward from the upper end to near the middle, and the tank guide fixing member B42 was cut and raised at the opening B41a. It is fixed to both wing pieces B 4 1 b with screws and screws.

The tank guide fixing member B42 is for mounting the joint receiving portion 100 and the electromagnetic pump B14, has a U-shaped box body, and has a predetermined joint receiving portion 100 on the upper surface. The position is fixed with screws, and the lower surface is fixed with an electromagnetic pump B14 with screws. The inner surface of the fixing member B42 is such that when the oil tank B12 is mounted on the main body, the recess B12g (Fig. 48) that fixes the connection joint B47 of the oil tank does not touch. Then, it projects to the tank storage chamber 4a side so that the joint receiving portion 100 on the upper surface thereof can be connected to the connection joint portion B47 (FIG. 49) on the tank side.

The connection joint receiving portion 100 (Fig. 64) is an integrated unit of the oil supply side joint receiver 13b and the return oil side joint receiver B17b. A copper-based outgoing pipe B21 is connected to 13b, and a copper-based return oil pipe B23 is connected to return oil side joint receiver B17b.

As shown in Fig. 65, the connection between the connection joint receiving portion 100, the living pipe B21, and the return oil pipe B23 is formed at the end of the torso pipe B21, B23. O-rings B99 for sealing are fitted to the distal ends of the flanged braided portions B21a and B23b, and the specified holes 98c and 98f of the connection joint receiving portion 100 are fitted. And the U-shaped groove 101 a formed on the lower side of the pipe fixing plate 101 from the outside of the corded parts B 21 a and B 23 a of the pipes B 21 and B 23. Insert the pipes B21 and B23 from above into the fixing plate 101 and the joint receiving part 100, and screw them into the screw holes 10lb and 100a, respectively, to fix them together. I just need.

The living piping B 2 1 and the return oil piping B 2 3 use copper-based material, and the living piping B 2 1 And the inner diameter of the return oil pipe B23 is set to be smaller than that of the pipe B21. Specifically, the inside diameter of the outgoing pipe B21 is set to 1.5 mm, and the inside diameter of the return oil pipe B23 is set to 3 mm. If the inside diameter of the outgoing pipe B 21 is made larger than 1.5 mm, the amount of fuel remaining in the living pipe B 21 at the time of fire extinguishing increases, and the fuel remaining at the start of operation or at the time of re-ignition is vaporized. It takes more time to return to oil refueling tank B12, which causes odor. Also, when the inner diameter of the return oil pipe B 23 becomes 4 mm or more, a phenomenon occurs in which the air in the pipe is replaced with fuel, and it becomes difficult for the fuel to return to the oil supply tank B 12, and the fuel is accumulated in the pipe, May cause odor. Conversely, if the inside diameter is smaller than 3 mm, only air is sent due to the resistance of the piping, and it may be difficult for fuel to return to the fuel tank B12. Also, a difference is made between the diameters of the two pipes to prevent connection errors during assembly processing.

The return oil piping B2 3 (Fig. 63) extends once below the carburetor B15 inside the main unit, as shown in Fig. 42, and further horizontally from the front of the main unit to the right side of the main unit. After passing through the front of the refueling tank B12, it extends substantially vertically upward from the right side of the main body and is connected to the connection joint receiving portion 100 of the refueling tank B12.

In this way, a part of the return oil pipe B23 comes out of the carburetor B15 and the pipe B23d is formed in a substantially horizontal state, so that when the operation is stopped, it is connected to the carburetor B15. When returning the remaining vaporized fuel to the refueling tank B12, temporarily leave it in the horizontal piping section (substantially horizontal section) B23d. At the start of ignition, the nozzle in the vaporizer B15 is closed for 1 to 2 minutes until the fuel in the vaporizer B15 is changed from liquid to gas and the fuel is ejected from the nozzle B31. Is blocked, the internal pressure of the gas generator B 15 increases, and the pressure is applied to the return oil pipe B 23, pushing up the fuel remaining in the return oil pipe B 23, It returns to the lubrication tank B12 via the connection joint receiving part 100 and the connection joint part B47.

In addition, since the fuel remaining in the vaporizer B 15 at the time of fire extinguishing is temporarily retained in the substantially horizontal portion B 23 d of the return oil pipe B 23, the temperature of the high-temperature fuel decreases during that time. , Low-temperature fuel can be sent to the connection means side, and materials with low heat-resistant grades can be used, resulting in improved durability and cost advantages.

The connection joint receiving portion 100 is composed of a receiving body B 98 fixed with screws on the upper surface of the evening guide fixing member B 42, an oil supply side joint receiver 13 b arranged side by side with the receiving body, and return oil. It has a joint receiver B 17 b and an air valve B 18 as a shut-off valve arranged on the receiver body B 98.

As shown in FIG. 66, the oil-supply-side joint receiver 13 b has a rod-shaped valve receiver 98 a protruding upward from the center of the concave portion formed on the upper surface of the receiver main body B 98, and its periphery. A substantially cylindrical rubber connection packing 102 placed on the upper surface of the receiving body B 98 so as to cover the surroundings, and a lower end flange 1 of the packing 102 covering the periphery of the packing 102 0 2b is provided on the upper surface of the main body B 98 with a screw, which is fixed in a substantially cylindrical shape by a screw 103. The electromagnetic pump B 1 4 extends from the groove 98 b formed around the valve receiver 98 a. A horizontal tubular passage 98 c communicating with the side is formed in the receiving body B 98.

In the middle of this passage 98c, as shown in FIG. 68, an inverted U-shaped rising passage 98d that rises above the passage 98c is formed. The rising passage 98 d is formed in a cylindrical portion 98 h integrally formed on the upper surface of the receiving body B 98, and air is formed in a concave portion on the upper surface of the cylindrical portion 98 h via a packing 104. The valve B18 is fixed with a screw, and the outlet 18a of the air valve B18 is open to the upper end of the inverted U-shaped passage 98d.

Further, as shown in Fig. 68 (a), the rising passage 98d is a vertical upward passage 982 having a substantially crescent cross section communicating with the joint receiver 13b across the partition wall 98i. d 1 and a longitudinally downward passage 98 d 2 having a circular cross section communicating with the living pipe B 21 on the electromagnetic pump B 14 side, and both passages 98 d, 98 d 2 The upper end communicates above the partition wall 98i.

The passage area of these two passages 9 8 dl and 98 d 2 is the same as that of the passage 98 d 1 It is set smaller than the area. This is to reduce the amount of fuel remaining at the time of fire extinguishing and to reduce the time required to return the remaining fuel from the carburetor to the refueling tank at the start of operation or at the time of re-ignition. Eliminating the factors causing odor, the fuel is quickly returned to the fuel tank side to cut off the route. The connection packing 102 (Fig. 66) attaches the valve body B59 on the lubrication joint B13a (Fig. 56) side to the lubrication joint holder B13b (Fig. 66). It is intended to relieve the impact and to seal when inserted, and has a substantially cylindrical shape and a cylindrical portion B55c and a valve body B59 on the upper side of the oil transfer joint B13a. There is a hole 102a through which can enter.

The packing presser 103 serves to improve the sealing performance by pressing the connection packing 102 from above and to function as a guide when receiving the connection joint B47 from above. A hole 103a into which the body portion B55a and the tapered portion B55b on the B13a side can enter is formed.

The air valve B18 (Fig. 68 (b)) is used to take air from outside the oil supply path from the oil supply tank B12 to the electromagnetic pump B14 and shut off the fuel supply in the oil supply path. And an electromagnetic coil B 18 d disposed around the valve chamber B 18 b, and the electromagnetic coil B 18 d is deenergized to move in the valve chamber to hold the upper valve press B 18 e. A valve body B18g for opening and closing the air hole B18f formed in the valve body, and a coil spring B18h for urging the valve body B18g in the opening direction of the air hole B18f, It has a communication outlet B18a formed below the valve chamber to communicate with the inverted U-shaped passage 98d on the oil supply side, and the valve body B18g is excited by the electromagnetic coil B18d. Moves to close the air hole B18f, and demagnetize the electromagnetic coil B18d to open the air hole B18f with the urging force of the coil spring B18h, and the valve body B18 communication outlet through the periphery of g Air is supplied from B 18 a to the rising passage 98 d side.

The valve body B18g is a bottomed cylindrical body B18i, a valve element B18j which is provided at the upper end opening so as to be able to protrude and retract, and biases the valve element B18j to the protruding side. Spring B 18k When the air hole B18f is closed, the collision with the valve retainer B18e is relieved.

An air valve cover 111 for protecting the air valve B 18 is fastened to the outer periphery of the air valve B 18 together with a receiving body B 98 of the connection joint receiving portion 100. The air valve cover 1 1 1 must have at least the lubricating joint receiver B 13 b (Fig. 66) on the vertical surface 1 1 1 a side. When the lubrication tank B 1 2 is mounted on the main body, the connection joint A guide function for guiding the protection cover 120 (FIG. 50) of the part B 47 is provided.

On the other hand, as shown in FIG. 67, the return oil side joint receiver B 17 b of the second connection means has a valve chamber 98 below the valve hole 98 e formed on the upper surface of the receiver body B 98. A valve mechanism 105 is accommodated in i, and a passage 98 f from the carburetor 14 is formed on the side surface of the valve chamber 98 i so as to communicate in the horizontal direction.

The valve mechanism 105 includes a receiving valve element 106 that closes the valve hole 98 e so that it can be opened and closed, a receiving valve element cap 108 that closes the lower part of the valve chamber 98 i, and a cap 108. And a receiving valve element spring 106 interposed between the receiving valve element 106 and the receiving valve element 106 to urge the receiving valve element 106 in the valve hole closing direction, and fitted on the closing surface of the receiving valve element 106. And an O-ring 110 for sealing the received valve element cap 108. The reason why the receiving valve body 106 is provided is to receive the valve body B59 of the joint B17a on the return oil side, which is the second connection means, and to remove the odor when the oil tank B12 is removed. This is to prevent leakage.

The receiving valve body spring 107 is brought into a compressed state when the connection joint B17a presses the receiving valve body 106 when the oil supply tank B12 is set in the main body. The receiving valve body cap 108 has a concave shape that guides the lower part of the receiving valve body 106 when the receiving valve body 106 is moved downward by a fixed distance by the valve body B59 of the connection joint B17a. A receiving portion 108 a and a receiving surface 108 b of a receiving valve body spring 107 formed around the receiving portion 108 a are provided. This receiving valve body cap 108 is inserted from the opening of the fuel passage on the bottom surface side of the connection joint receiving part 100, and the connection joint receiving part 100 is screwed into a predetermined position of the tank guide fixing member B 42. When fixed, the tank guide fixing member B42 can press the portion, and the inserted valve receiving cap 108 is prevented from jumping out of the connection joint receiving portion 100.

In the connection joint receiver B 17 b, the connection packing 102 is arranged on the receiving body B 98 in the same manner as the first connection joint receiver, and the packing retainer 103 is located above the connection packing 102. It is fixed with screws.

An electromagnetic pump B14 as an oil feed pump is fixed at a predetermined position below the tank guide fixing member B42. The connection of the outgoing pipe B 21 connected to the electromagnetic pump B 14 and the return oil pipe B 23 from the carburetor B 15 to the connection joint receiving portion 100 is as described above. Insert the ring B99 into the tie-down portions B21a and B23a of the piping B21 and the return oil piping B23, then insert them into the specified holes of the receiving body B98, Then, after passing the pipes B 21 and B 23 through the U-shaped groove 1 O la (Fig. 65) of the pipe fixing plate 101, it may be fixed with screws.

In the above configuration, the fuel in the fuel tank B12 flows from the connection joint B13a (Fig. 56) to the connection joint receiver B13b (Fig. 66) only after the electromagnetic pump B14. When the fuel in the fuel tank B12 is sucked up by the suction pipe B20 by the drive of the valve, the fuel enters from the lateral direction of the connection joint part B47 and the valve mechanism B56 which is opened is opened. Passes through the gap between the part B55c and the body B59, flows to the connection joint receiver 13b, passes from the groove 98b through the passage 98c, and rises below the air valve B18. After 98 d, fuel is sent from the electromagnetic pump B 14 to the carburetor B 15. Fig. 69 is a plan view showing the configuration of the detection table, Fig. 70 is a schematic diagram showing the mounting position of the tank mounting detection means, Fig. 71 is a schematic diagram of the electrode on the water tray side, and Fig. 72 is a tank FIG. 73 is a schematic diagram of a side electrode, and FIG. 73 is a schematic diagram of a tank mounting detecting means.

As shown in the figure, at the bottom of the storage room 4a, there is a detection table on which the refueling tank B12 is placed. B 40 (FIG. 70) is located. The detection table B 40 is mounted on the mounting table B 5 below the refueling tank B 12, and includes tank mounting detecting means B 70 for detecting whether the refueling tank B 12 is mounted, and water And a mechanism for mounting the electrode of the detecting means B68.

The detection stand B40 has left and right ends formed with upright walls B40s at upper and lower sides, and a tip of the upper upright wall B40s has a shape expanding outward. At the approximate center of the detection table B40, there is formed a recess B40a for the water tray B711 which is depressed downward, and on both left and right sides of the recess B40a, a refueling tank B12. Two storage recesses B40t, which are long in the front-rear direction and receive the tank leg B50 (Fig. 48) on the lower surface, are recessed. In addition, a plurality of V-grooves B40c for supporting and fixing the lead wire are formed in the lower vertical wall on the right side of the detection table B40.

The mounting recess B 40 a and the mounting surface B 40 on the left side of the housing recess B 40 t have τΚ detecting means Β68 electrodes Β72, Β73 3 0 d and B 40 e, and two lever receiving portions B 40 h and B 40 g serving as electrodes are provided.

At four places on the front, back, left and right of the detection table B40, mounting posts B40J for fixing the tank guide B41 are provided, and the tank guide B41 is attached near the rear mounting boss with the side back plate B. A guide rail B 40 k is provided for fixing to the base 7.

A lead switch Β 79 as a proximity switch of the fuel amount detection means Β 69 is attached to the recess B 40 η formed on the back surface of the accommodation recess B 40 a of the detection table B 40. The electrodes Β72 and 873 of the water detecting means Β68 are composed of electrode levers 115. As shown in Fig. 71 (a), the electrode lever 151 is formed by bending a stainless steel plate having elasticity in a step-like shape, and receiving the lead wire connector at the base. 1 51 a has a screw hole 15 5 b for fixing the detection table and a receiving hole 15 1 c formed on the tip side, and the tip is bent upward in an L shape. . On the detection base B 40 side to be attached to this electrode lever 1 5 1, there is a lever mounting boss

B 40 Q is projected downward, and a fixing hole B 40 p is formed in the boss. A circular convex receiving portion B40h serving as a fulcrum of vertical movement of the lever 151 is formed protruding near the mounting portion.

To install the electrode lever 151, insert the electrode lever 151 into the receiving hole 151c in the receiving part B 40h of the detection base B40, then insert the screw hole 151b of the lever 151 into the mounting hole for the detection base B40. Fix the screw to the boss B 40 p according to B 40 q. Then, the tip of the electrode lever 151 comes out of the square holes B40d and B40e to the front side. In order to regulate the protrusion dimension, a rib B4Om is formed on the back surface of the detection base B40 so as to protrude. As described above, the electrode lever 151 has a swing fulcrum different from that of the fixed part at the base, so that stress is not concentrated on the fixed part, and the durability is improved. The tank mounting detection means B 70 is disposed on the rear side of the detection table B 40, and as shown in FIG. 61, a tank detection plate 117 fixed to the rear side of the detection table B 40, A lever 113 is attached to the detection plate 117 so as to be able to swing up and down, and makes contact and swing with the bottom of the oil tank when the oil tank B12 is mounted on the main body. It has a microswitch 112 (FIGS. 71 and 73) attached to a detection plate 117 so as to be turned ON / OFF, and a lever spring 116 which is urged when the lever 113 is moved.

The lever 113 is formed in an L-shape in plan view with a small width, a boss 113b serving as a pivot point is formed at one end, and the other end protrudes from the tank detection plate 117 to the detection table B40 side to supply the refueling tank. The receiving surface of the tank is 113a.

The tank detection plate 117 is formed by bending a plate-like member into a U-shape, and has a shaft portion 117 a for mounting a lever on its upright wall surface, a storage recess 117 b for mounting the microswitch 112, and a tank support for the lever 113. A square hole 117c substantially equal to the movable width when the surface moves up and down is formed.

Both ends of the lever spring 116 are locked by the upper plate of the tank detection plate 117 and the lever 113, and bias the lever 113 in the direction to turn on the microswitch 112. To assemble the above mounting detection means B 70, insert the lever spring 1 16 into the lever 1 13 and lock it, and then insert the lever 1 1 3 into the square hole 1 17 c of the tank detection plate 1 17 Through the tank receiving surface 1 1 3 b, and then insert the boss 1 1 3 b on one end of the hopper 1 13 into the shaft 1 1 7 a of the tank detection plate 1 1 7 and fix it with a retaining ring . Also, the micro switch 1 12 is inserted into the pin of the storage recess 1 17 b of the tank detection plate 1 17 and fixed with the snap ring to complete.

The operation of the tank mounting means B 70 is such that when the fuel tank B 12 is mounted on the main body B 1, the tank receiving surface 1 13 a of the lever 1 13 is pushed down by the fuel tank B 12. Then, the microswitch 1 1 2 is opened, and the circuit becomes ΔN. Conversely, when the refueling tank B1 2 is not mounted on the main unit, the tank receiving surface 1 1 3 a of the lever 1 13 does not receive the refueling tank B 1 2, so it is pushed upward by the lever spring 1 16 As a result, the microswitch 1 1 2 is closed and turned off in the circuit.

As described above, the movable contact of the microswitch 112 is opened when the tank is installed, and closed when the tank is removed. The margin for operation of the microswitch 1 1 and 2 is large, and the occurrence of troubles is reduced.

In addition, referring to the positional relationship between the fuel level in the fuel tank B12 and the connection means, the fuel in the fuel tank B12 is sucked up at the connection joint B47 of the fuel tank B12. Passing passage B55p (Fig. 56) is located above the filling level of refueling tank B12 so that fuel leakage at the joint connection of connection joint B47 can be avoided. It has become.

In the connection joint receiving portion 100, the upper end of the partition wall 98i of the rising passage 98d (Fig. 68) below the air valve B18 is set to be higher than the fuel level in the fuel tank B12. I have. Here, the fuel level in the refueling tank is the level in the normal full display. Also, when the fuel level in the fuel tank B12 abnormally rises due to the temperature difference, the return oil pipe B6 from the carburetor B15 side of the joint part B47 to the fuel tank B12 The piping outlet B 6 3 b of 3 is set to be higher than the abnormal liquid level of the fuel in the fuel tank B 12, and the fuel returns from the fuel tank to the carburetor B 15 through the oil path. Prevents returning. Also, at this time, even if the pump B 14 is stopped from being sent from the connection joint portion B 47 to the electromagnetic pump B 14 side, the fuel is not sent any further. Further, the position of the air hole B 18 の of the air valve B 18 is set so as to always be located above the abnormal liquid level, and the fuel flows from the fuel tank Β 12 through the air valve Β 18. We do not leak to the outside.

Also, in the connection joint receiving portion 100, the upper end of the partition 98 of the rising passage 98d below the air valve の 18 is always above the normal liquid level of the refueling tank B12. When the air valve B 18 is opened and air is taken into the oil supply path, the riser passage 98 d has a large passage area 98 d 1 on the refueling tank side, so the fuel is quickly returned to the refueling tank side, The supply of fuel is reliably shut off.

[Configuration of control device]

FIG. 74 is a block diagram of a control circuit for controlling various operation modes by signals from the fuel amount detecting means B69, the water detecting means B68, and the tank mounting detecting means B70. As shown in the figure, the control section 14 1 is composed of a microcomputer 14 1 with a built-in CPU, ROM and RAM, and has a fuel amount detection means B 69 and a water detection means B 6 8 on the input side. , And tank mounting detection means B70 are connected, and the electromagnetic pump drive circuit 118, display section 149, and valve drive circuit 119 are connected to the output side, and the operation is controlled by various input signals. It has become.

For example, when the oil tank is pulled out during operation and the tank mounting detection means B70 is OFF (no tank), this signal is input and the stop signal of the electromagnetic pump B14 is sent to the pump drive circuit 118. Control to output the air valve B18 open signal to the valve drive circuit 1 19 and stop the operation. When the stage B70 is ON, it is also possible to perform control for driving the dry burning cleaning operation mode in which the vaporizer B15 is burned dry.

[Operating at Oil Fan Hee]

Next, the operation of the above-described oil fan heater will be described. ， When the fuel tank B 1 2 becomes empty, open the cover B 4 of the main body B 1, take out the fuel tank B 1 2 with the handle B 4 3, and put the handle B 4 3 on the upper side Remove the closing means B19 with, and supply fuel from the fueling port B444 of the fueling tank B12. In this case, the refueling tank B1 2 is replenished by placing the handle B4 3 on the flat surface and placing it on a flat surface. Therefore, there is no need to turn the refueling tank B1 2 upside down. Fuel can be easily and reliably replenished without fuel contamination of the fuel filler cap.

When the refueling is completed, open the tank cover B4 of the main body B1 and set the refueling tank B12 containing fuel in a predetermined position. At this time, the lower part of the cushion cover 120 attached to the connection joint part B47 of the refueling tank B12 becomes the air valve protection cover 1 of the joint receiving part 100 on the combustion part side. Along the outside of the joint joint receiving part 100, and the connecting joint part B47 on the refueling tank B12 side is connected to the joint receiving part 100 on the combustion part side. (Fig. 75 to Fig. 78).

At this time, in the lubrication joint B 13 a of the connection joint B 47, the valve body B 59 fits into the hole 103 of the packing retainer 103 of the lubrication joint receiver 13 b. It is guided and inserted, enters the hole 102a of the connection packing 102 and comes into contact with the valve catch 98a. At this time, the hole 102a of the connection packing 102 is closed and sealed with the main plate cylindrical portion B55c of the connection joint portion B47, so that fuel does not leak from this connection portion.

Further, when the refueling tank B1 2 is inserted into the main body B1, the valve body B59 of the lubricating joint B13 3a is pushed upward by the valve receiver 98a, and the valve body spring B61 is moved. Compression state, valve body B59 opens, and oil supply tank B12 suction pipe B The oil supply path B flowing from 20 to the electromagnetic pump B14 side through the connection joint B13a is opened.

Similarly, the joint B 17 a (FIG. 58) on the return oil side of the lubrication tank B 12 performs the same movement, and the valve body B 59 of the connection joint B 17 a is connected to the connection joint receiving part 1. 0 0 Presser foot 1 0 3 Guide hole is inserted into 1 3 a hole, and packing gasket is inserted into 1 2 0 hole 2 0 2, and return oil side joint B 1 3 a valve body B 5 9 It comes into contact with the valve body 106 of the valve mechanism 105 of the receiving body B98. At this time, the connection packing 102 and the tubular body B55c of the connection joint B47 are closed and sealed, so that fuel does not leak.

Further, when the refueling tank B12 is inserted into the main body B1, the receiving valve body 106 of the valve mechanism 105 (Fig. 67) moves downward, and the concave portion 10 8a, and the valve body B59 of the return oil joint B17a is pushed upward by the receiving valve body 106, and the valve body spring B61 is compressed. The valve body B59 is opened. As a result, the return oil path C returning from the carburetor B15 to the fuel tank B12 via the pipe B23 is opened.

Refueling tank B1 2 is attached to main body B1, and when the bottom surface of refueling tank B12 reaches detection table B40 at the bottom of storage chamber 4a, tank legs B5 0 of refueling tank B1 2 The rear lever contact surface B5 0d is the tank mounting detection means B7 0 (Figs. 69, 73) The lever 1 1 3 lever 1 1 3 receiving surface 1 1 3 a Press down the micro switch 1 1 Put 2 in the 〇N state on the circuit.

When the power switch is turned on by operating the oil fan heater operation switch (not shown) with the oil supply tank installed, the electromagnetic pump B14 is driven because the air valve B18 is open in a demagnetized state. Then, air is taken in from the air hole B18f of the air valve B18 (Fig. 68 (b)), and is sent to the oil supply path B. Therefore, the fuel in the fuel tank B 1 cannot be sucked up from the suction pipe B 20, and the fuel remaining in the oil supply path B is sent to the carburetor B 15, and the fuel in the carburetor B 15 With the remaining fuel At the same time, return fuel from return oil path C to refueling tank B 12 so that no fuel remains in the path.

In the carburetor B15, when the operation switch is turned on, the carburetor heater is heated, and the carburetor B15 is preheated to a predetermined temperature. When the preheating completion temperature is reached, the air valve B 18 is energized, the electromagnetic coil B 18 d is excited, and the valve body B 18 g moves in the direction to close the air hole B 18 f, Stop intake of air from air hole B 18 ί. Then, the oil supply path 流れる flowing from the oil supply tank Β12 to the electromagnetic pump Β14 through the connection means is brought into communication, and the fuel in the oil supply tank Β12 is sent to the oil supply path Β.

In the carburetor Β15, the fuel sent by the electromagnetic pump に 14 is converted into a vaporized gas, and the fuel is blown out from the nozzle Β31 of the carburetor Β15 and mixed with the combustion air in a parner to form a vaporizer. The gas is blown out from the flame 16 b of the cylinder 16, and is ignited at the flame 16 b and burns in the combustion chamber B 30. At this time, the control unit 14 1 (Fig. 74) controls the drive of the electromagnetic pump B 14 based on the difference between the room temperature detected by the room temperature thermistor 11 and the set temperature set from the operation unit B 3. The amount of liquid fuel sent to the carburetor B15 is adjusted to appropriately adjust the amount of heat generated by combustion.

When combustion is started and the flame sensor B36 (Fig. 42) detects a flame current of a preset current value or more, a fan motor (not shown) is energized and the blower fan B9 rotates to suck indoor air. . The rotation speed of the fan motor is controlled by the control unit 141. The sucked indoor air deprives the obtained radiant heat in the combustion chamber B30, and blows out the hot air along with the combustion gas from the outlet 2 into the room, and the indoor temperature rises to control the temperature.

When the operation of the main body B 1 is stopped, the operation of the electromagnetic pump B 14 is stopped, and the air valve B 18 is opened, so that air enters the path from the outside, and the supply of fuel is reliably stopped and shut off. .

[Other embodiments] The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made within the scope of the present invention. For example, it goes without saying that a configuration having a filter shown in FIGS. 79 to 83 in addition to the configuration in FIG. 61 may be adopted as the configuration of the filler port.

FIG. 79 is a schematic cross-sectional view showing another embodiment of the filler opening, FIG. 80 (a) is a plan view of the filter, (b) is a side cross-sectional view of the filter, and FIG. 1. It is an enlarged view of the upper part of the main body.

As shown in FIG. 79 and FIG. 80, a fill tank 300 is provided at the fueling port B44 of the fueling tank 6, so that when fuel is supplied to the fueling tank 6, dust in the fuel is reduced. It is designed to remove dust.

The filter 300 is composed of a filter body 301 and a finely meshed portion 302. The filler body 301 is formed in a cylindrical shape with a bottom, and when attached to the filler port, is formed considerably longer than the level of fuel filled in the filler port B44, and is formed at the upper part. A flange 301a to be placed on the upper edge of the base of the fuel filler B44 is formed at the opening edge, and the side surface is formed in a lattice shape from near the flange to near the bottom.

As shown in FIG. 80, a plurality of ribs 303 are formed to protrude inward on the inside of the filter main body 301 to guide the hose of a commercially available injection pump at the time of refueling. When the hose is inserted, it has a shape that does not easily come off. As shown in Fig. 81, when the diameter of the hose of the commercially available infusion pump is different, the lower end of the rib 310 protruding in an arc shape is opened and the hose is inserted. Then, it is preferable that the ribs 310 be spread outward so that the hose is guided to the inside of the filter.

Further, as shown in FIG. 80, an air hole 305 is provided near the inner surface of the flange 310a of the filter main body 301 so as to avoid a negative pressure state due to fuel flow during refueling. To drain the fuel and water remaining in the refueling tank. The air is returned to the outside through the air hole 305.

An upwardly projecting rib 304 is formed on the inner bottom surface of the filter body 301 so that even if the end of the hose of a commercially available injection pump at the time of refueling reaches the bottom, the hose bottom There is a gap between the bottom of the main unit and the fuel flows smoothly.

The mesh portion 302 has a fine mesh of about 200 mesh, and is stretched from the vicinity of the upper flange to the vicinity of the bottom surface in the side lattice portion of the filter main body 301. The mesh portion 302 is formed at the same time when the filter main body 301 is formed.

FIG. 82 is a cross-sectional view showing Example 2 of the filter 300. As shown in the figure, the filter 300a is divided into two stages, upper and lower, in order to prevent water from entering from the outside during refueling.・ The mesh part is also divided into two stages up and down, the upper open mesh part 302 is made to pass water and oil, and the lower mesh part 315 is made of water repellent that does not allow water to pass. By using the treated part, water mixing when refueling the fuel tank does not enter the tank directly but stays in the filter and the post-treatment of water can be easily performed.

FIG. 83 is a sectional view showing Example 3 of the filter 300. As shown in the figure, the filter 300b is composed of a side mesh portion 302 extended on a lattice formed on the side surface of the filter main body 301, and a bottom surface of the filter main body 301. The bottom mesh part 320 is provided with a bottom mesh part 320 with an opening formed in it, the side mesh part 302 is a part through which water or oil passes, and the bottom mesh part 320 is water-repellent treatment that does not allow water to pass through. By using this part, water mixing when fuel is supplied to the refueling tank does not directly enter the tank, but remains in the filter to facilitate post-treatment of water.

As is clear from the above description, in the present invention, the fuel tank for temporarily storing fuel below the fuel tank is abolished, and the fuel in the fuel tank is directly fed to the combustion section. Refuel without having to turn it over when refueling it can.

In this way, in a liquid fuel combustion system that abolishes the fuel tank and feeds the fuel from the fuel tank directly to the combustion section, the fuel spills and scatters into the air holes that are opened to prevent negative pressure inside the fuel tank. Since the air hole closing means is provided to prevent fuel leakage, it is possible to prevent the fuel from scattering when the tank is carried or the fuel from leaking when the tank falls.

In addition, since the refueling tank has a refueling system in which the refueling port always faces upward, a filter that removes dust and the like in the fuel is provided at the refueling port, so that when refueling, dust and dirt inside the refueling tank are filled. Dust can be prevented from entering. Industrial applicability

INDUSTRIAL APPLICABILITY As described above, the liquid fuel combustion device according to the present invention is suitable for a heater device used in winter or cold regions, for example, an oil fan heater, which is used after the fuel tank is extracted from the main body, charged with fuel, and then loaded. .

Claims

The scope of the claims

1. In a liquid fuel combustion apparatus in which a fuel tank having a fuel filler port and a closing member at the top is detachably housed in a tank housing chamber of the apparatus body,

A liquid fuel combustion device provided with a filler opening prevention means for preventing release of the closing member when the fuel tank is attached to the main body.

2. Includes a refueling port and an obstruction member at the upper part, including a refueling tank removably accommodated in a tank accommodating chamber in the apparatus main body, and a combustion section for burning fuel, below the refueling tank. In a liquid fuel combustion apparatus for supplying fuel directly to the combustion section from the refueling tank by eliminating a container for temporarily storing fuel,

3. The filler opening prevention means is such that the upper surface and a part of the side surface of the filler tank are inclined surfaces, the filler port is arranged on the inclined surface, and the closing member is released when the main body is mounted on the wall surface of the tank housing chamber. 3. The liquid fuel combustion device according to claim 1, wherein the liquid fuel combustion device is configured to be blocked by the liquid fuel combustion device.

4. The filler opening prevention means has a slope formed at a predetermined angle between an upper surface of a filler tank and two side surfaces adjacent to the upper surface, and a filler port is arranged on the slope, and the filler is provided when the main body is mounted. 3. The liquid fuel combustion device according to claim 1, wherein release of the closing member is prevented by a wall surface of the tank housing chamber.

5. The refueling port release inhibiting means, wherein the refueling port is arranged above a side surface of the tank, and wherein the opening of the closing member is prevented by a wall surface of the tank housing chamber when the main body is mounted. Or the liquid fuel combustion device according to item 2.

6. The fuel filler opening prevention means, wherein the filler filler is disposed on an upper surface, and a restricting member for restricting release of the closing member in a state where the main body is mounted is provided. A liquid fuel combustion device according to the item.

7. A fixed plate in which the closing member is integrated with a filler port, a movable plate supported by the fixed plate so as to be able to rotate and open and close, and a lid member provided with a packing which is provided on the movable plate and closes the filler port. 3. The liquid fuel combustion device according to claim 1, further comprising: a locking member configured to hold the movable plate in a fuel supply closed position.

8. The locking member is disposed on the open end opposite to the pivot point of the movable plate, and the locking portion is rotatably supported by one of the movable plate and the fixed plate. A locking lever attached to the movable plate, a locking receiving portion provided on the other of the movable plate and the fixed plate so as to engage with the locking portion and hold the movable plate in the closed position, and lock the lever. 8. The liquid fuel combustion device according to claim 7, further comprising a lever panel that urges the portion in a direction in which the portion engages with the lock receiving portion.

9. A part of the locking lever is extended, and the extended portion and the wall surface of the tank accommodating portion constitute an oil filler opening prevention means. When the fuel tank is mounted on the main body, the locking lever is turned. 9. The liquid fuel combustion device according to claim 8, wherein the dynamic release is prevented by contact between the extension portion and a wall surface of the tank housing chamber.

10. The pivot point of the movable plate is disposed closer to the outer peripheral portion of the fuel tank than the open end, and a regulating member is provided on the pivot point side of the movable plate. The fuel supply port opening prevention means is constituted by the wall surface, and the rotation opening of the movable plate is prevented by the contact between the regulating member and the wall surface of the tank housing chamber when the fuel tank is mounted on the main body. A liquid fuel combustion device according to the item.

11. The liquid fuel combustion device according to claim 1, wherein a liquid level detection unit that detects a liquid level of fuel in the tank is provided below the fuel tank.

12. The liquid supply device according to claim 1 or 2, wherein a drain hole is formed in a bottom surface of the fuel tank, and the liquid level detection unit is disposed on a lid member that opens and closes the drain hole. Liquid fuel combustion device.

1 3. A refueling tank that is detachably mounted in the body, a combustion section having a vaporizer that heats and vaporizes the fuel, and a burner that burns the vaporized fuel. There is an oil pump that sends Kunk fuel to the vaporization section, and a connection section that connects the oil tank to the oil supply path to the combustion section when the oil tank is attached to the main unit. A liquid fuel combustion system that abolished the fuel tank for storing fuel and sent fuel from the refueling tank directly to the combustion section.

An air hole opened in the oil tank so that the inside of the oil tank does not become negative pressure;

An air hole closing mechanism for preventing fuel from scattering or leaking from the air hole. '

14. The air hole closing mechanism is a valve arranged outside the oil supply tank to close and close the air hole so as to be able to open and close, a tank valve lever mounted with the valve and swinging up and down, and the tank valve. With a movable rod that moves the lever up and down,

When the movable rod is pressed by a member on the main body side when the fuel tank is mounted on the main body and moves upward, the tank valve lever is swung toward the valve opening side. 14. The liquid fuel combustion device according to claim 13, wherein the first fuel is swung in a valve closing direction.

15. The liquid fuel combustion apparatus according to claim 14, wherein a spring is provided for forcibly swinging the tank valve lever in the valve closing direction when the fuel tank is removed from the main body.

16. The liquid fuel combustion device according to claim 13, wherein the air hole closing mechanism is made to function faster than a connection portion of the oil supply path when the fuel tank is attached to the main body.

17. The range according to claim 14, wherein the movable bar is vertically movably mounted in a vertical hole formed in a connection portion on the refueling tank side, and has a lower end protruding below the connection portion. A liquid fuel combustion device according to claim 1.

1 8. A refueling tank detachably mounted in the main body, a combustion section having a vaporization section for heating and vaporizing the fuel and a burner for burning the vaporized fuel, An oil pump that feeds the fuel from the oil tank to the vaporizer and a connection that connects the oil tank to the oil feed path to the combustion section when the oil tank is attached to the main unit are provided, and are temporarily located below the oil tank. A liquid fuel combustion system in which a fuel tank for storing fuel is eliminated and fuel in a fuel tank is directly fed to a combustion unit, wherein a filter for removing dust and the like in the fuel is provided in a fuel port of the fuel tank. Liquid fuel combustion device provided.

19. The liquid fuel combustion apparatus according to claim 18, wherein the filter is formed in a cylindrical shape, and a mesh portion through which fuel passes is provided up to a vicinity of a fuel supply port.

20. The liquid fuel combustion apparatus according to claim 18 or claim 19, wherein a convex portion is provided upward on a bottom portion of the filter.

21. The liquid fuel combustion apparatus according to claim 18, wherein a hose guide for an injection pump for replenishing fuel into the tank is provided on an inner surface of the filter.

22. The liquid fuel combustion according to claim 20, wherein a hose guide guide of an injection pump for replenishing fuel into the tank is provided on an inner surface of the fill tank.

23. The mesh part provided on the side surface of the filter, wherein a mesh part that allows water to pass therethrough is disposed at an upper part, and a mesh part that does not allow water to pass therethrough is disposed at a lower part. Item 31. The liquid fuel combustion device according to Item 19 or 22.

24. The mesh part provided on the side face of the filter, wherein a mesh part that allows water to pass therethrough is disposed at an upper part, and a mesh part that does not allow water to pass therethrough is disposed at a lower part. A liquid fuel combustion device according to the item.

25. The mesh part provided on one side surface of the filter, wherein a mesh part that allows water to pass therethrough is provided in an upper part, and a mesh part that does not allow water to pass is provided in a lower part. A liquid fuel combustion device according to claim 1.

26. A refueling tank removably housed in the tank housing chamber in the device body, A liquid fuel combustion device comprising: a combustion section for burning fuel sent from a fuel tank; eliminating a fuel tank for temporarily storing fuel; and feeding fuel from the fuel tank directly to the combustion section. hand,

A liquid fuel combustion device, comprising: a fuel detection unit that detects fuel on a bottom surface side of the fuel tank.

2 7. Equipped with a refueling tank removably housed in the tank housing chamber in the device body, and a combustion unit for burning the fuel fed from the refueling tank, and abolished the fuel tank that temporarily stores fuel. This is a liquid fuel combustion device that sends the fuel in the fuel tank directly to the combustion section,

A liquid fuel combustion device, comprising: a water detection unit that detects water in the fuel tank on the bottom side of the fuel tank.

28. Equipped with a refueling tank removably housed in the tank housing chamber in the device body, and a combustion unit for burning the fuel fed from the refueling tank, eliminating the fuel tank that temporarily stores fuel, A liquid fuel combustion system that sends fuel from the fuel tank directly to the combustion section,

A liquid fuel combustion device with a tank attachment detector that detects whether or not the fuel tank is attached to the bottom of the tank.

29. The fuel detector has a built-in magnet that functions as a detected part, and a float that moves up and down in accordance with a change in the liquid level of the fuel in the refueling tank, and a tank mount side facing the float. 27. The liquid fuel according to claim 26, further comprising: a lead switch that is installed and that is turned on and off in accordance with the approach and separation operations of the magnet.

30. The water detecting section includes a conductive water tray provided on the bottom of the conductive tank for storing water, an electrode in contact with the water tray, an electrode in contact with the oil supply tank, and a water tray. It has an insulator that electrically insulates the fuel tank from the refueling tank, and detects water based on the difference in electric resistance between the water stored in the water receiving tray and the fuel. 28. The liquid fuel combustion device according to claim 27, wherein:

31. The liquid fuel combustion apparatus according to claim 30, wherein said water receiving tray is formed separately from a fuel tank and is mounted on a bottom mounting hole of said fuel tank via an electrical insulator.

32. The liquid fuel combustion apparatus according to claim 30 or 31, wherein said water receiving tray is formed of a stainless steel mesh plate.

33. The liquid fuel combustion device according to claim 32, wherein a non-conductive paint is applied to a bottom surface of the water tray formed of the stainless steel mesh plate.

34. The third aspect of the present invention, wherein the electric insulator comprises a non-conductive packing interposed between a peripheral wall of a hole formed in a bottom surface of the oil tank and a periphery of a water receiving tray. 2. The liquid fuel combustion device according to item 1.

35. The liquid fuel combustion apparatus according to claim 34, wherein a water-repellent treatment is applied to the packing.

36. The liquid fuel combustion apparatus according to claim 27 or 30, wherein a guard member for guarding said water tray is attached to an oil supply tank side on which said water tray is mounted.

37. The liquid fuel combustion apparatus according to claim 28, wherein the tank mounting detection unit is configured by a micro switch installed on an upper surface of a refueling tank mounting table.

38. Equipped with a refueling tank removably housed in the tank housing chamber in the device body, and a combustion unit for burning the fuel fed from the refueling tank, eliminating the fuel tank that temporarily stores fuel, This is a liquid fuel combustion device that sends the fuel in the fuel tank directly to the combustion section,

Liquid fuel combustion provided with a tank mounting detector that indicates whether or not the main unit is mounted on the refueling tank, and a control unit that stops operation when a tank no signal is input from the tank mounting detector apparatus.

3 9. Equipped with a refueling tank removably housed in the tank housing chamber in the device body, and a combustion unit for burning the fuel fed from the refueling tank, and abolished the fuel tank that temporarily stores fuel. This is a liquid fuel combustion device that sends the fuel in the fuel tank directly to the combustion section,

A tank mounting detector is provided to detect the presence / absence of the refueling tank mounted on the main unit. When the tank presence signal is input from the tank mounting detector, control is performed to drive an operation mode in which the carburetor of the combustion unit is idled. Liquid fuel combustion equipment provided with

40. Equipped with a refueling tank removably housed in the tank housing chamber in the device body, and a combustion unit for burning the fuel fed from the refueling tank, the fuel tank for temporarily storing fuel was abolished. This is a liquid fuel combustion device that sends the fuel in the fuel tank directly to the combustion section,

A fuel detector that detects the fuel in the refueling tank and a tank mounting detector that detects whether the refueling tank is mounted are provided.The tank mounting signal from the tank mounting detector and the fuel from the fuel detector are provided. A liquid fuel combustion device that controls operation so that operation can be started by inputting a presence signal.

4 1. A fuel tank, which is removably housed in the tank chamber inside the device body, and a combustion unit that burns fuel fed from the fuel tank, eliminate the fuel tank that temporarily stores fuel, This is a liquid fuel combustion device that sends the fuel in the fuel tank directly to the combustion section,

A fuel detector that detects the fuel in the refueling tank and a tank mounting detector that detects whether the refueling tank is mounted are provided.The tank mounting signal from the tank mounting detector and the fuel from the fuel detector are provided. A liquid fuel combustion device that controls operation to stop by inputting a no signal.

4 2. A fuel tank that is removably housed in a tank housing chamber in the device body, and a combustion unit that burns fuel fed from the fuel tank, temporarily provide fuel. A liquid fuel combustion system that eliminates the fuel tank for storing fuel and sends fuel from the fuel tank directly to the combustion section.

A fuel detection unit that detects fuel in the fuel tank and a display unit that displays the detection result of the fuel detection unit are provided, and when the no-fuel signal is input from the fuel detection unit, the display unit is notified of refueling. Liquid fuel combustion device.