JP2001355827A - Liquid fuel combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit the supply of fuel without overturning an oil tank upon supplying the fuel in a liquid fuel combustion device and improve the using property of the device. SOLUTION: Fuel in the oil tank is sent directly to a solenoid pump 13 to abolish a fuel tank for reserving the fuel temporarily. Oil sending side connecting means 9, 10 equipped with a valve mechanism for connecting an oil sending route between the oil tank 6 and a combustion unit to an oil returning route as well as oil side connecting means 21, 22 are provided while an oil sending joint receiver is provided with an air valve so as to be capable of intercepting the supply of the fuel surely. Further, a pressure valve mechanism 700 for regulating the internal pressure of the tank is provided utilizing the returning oil joint 21 to prevent the overflow of the fuel from the tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion device such as an oil fan heater.

[0002]

2. Description of the Related Art FIG. 19 is a partially omitted front sectional view schematically showing an example of a conventional oil fan heater, FIG. 20 is a side sectional view thereof, and FIG. 21 is a sectional view showing an oil supply cap and a receiver of an oil supply tank. It is.

As shown in FIG. 19, a conventional oil fan heater has an oil supply tank 102 for injecting and storing a liquid fuel 104 such as kerosene in advance on the inner side of a main body 101 thereof. A sufficient amount of liquid fuel 104 is supplied to a fuel tank 103 connected below the refueling tank 102.

[0004] The liquid fuel 104 stored in the fuel tank 103 is guided to a carburetor 107 via an oil feed pipe 106 by a fuel pressure feeding electromagnetic pump 105. Here, the sent liquid fuel 104 is vaporized by a vaporizer heater (not shown) provided in the vaporizer 107. 109
Is a combustion chamber, on the bottom of which a burner 108 is supported and fixed.

[0005] The fuel gas vaporized by the vaporizer 107 is vigorously injected from a nozzle, introduced into a burner 108 together with combustion air, burned at a flame opening 108 a, and the air in a combustion chamber 109 is heated. Then, as indicated by the arrow in FIG. 20, the air in the room sucked through the filter 112 by the blower fan 111 attached to the fan motor 110 such as a single-phase induction motor provided on the back surface of the main body 101 is supplied to the combustion chamber. The air is blown into the room from the outlet 113 as warm air together with the heated air and the combustion gas in the inside 109.

On the other hand, a flame sensor 114 provided slightly above the flame opening 108a detects a flame current due to combustion flame. When a flame current of a predetermined value or more is detected, the fan motor 110 is energized, and Accompanying fan 111
Rotates, and the air taken in from the room is blown into the room from the outlet 113 as warm air.

At this time, the room temperature is detected by the room temperature thermistor 115, and the control device (not shown) controls the drive of the fuel pump 105 for feeding the fuel based on the temperature difference between the room temperature and the set temperature. The heating power of the combustion flame in the burner 108 is adjusted by adjusting the supply amount of the 104 to the vaporizer 107.

Therefore, for example, when the operation of the oil fan heater is started when the room temperature is low, the supply amount of the liquid fuel 104 to the carburetor 107 is increased to rapidly raise the room temperature to the set temperature. Is adjusted to maintain a constant value near the set temperature.

The refueling of the fuel tank 102 is performed by
The refueling tank 102 is taken out of the main body 101, the up-down direction is reversed, the refueling cap 116 having the valve portion of the refueling tank 102 is removed, and fuel is injected from the base 117. After confirming that the fuel has been supplied to the fuel tank 102, the fuel cap 116 is fastened to the screw portion of the base 117, turned over so that the fuel cap 116 faces down, inserted into the main body 101, and inserted into the main body 101. The fuel supply cap 116 is inserted into the receiver 118 attached to the fuel tank 103, and placed on the fuel tank 103.

[0010]

By the way, in the conventional oil fan heater, it is necessary to take out the fuel tank from the main body in order to refuel the fuel tank and turn the fuel tank upside down in order to turn the fuel cap upward. After that, the oil supply cap is tightened and the oil supply tank needs to be turned upside down again for insertion into the main body, which is troublesome to handle.

Further, the fuel cap is fastened with a base and a screw, and there is a problem that when the fuel tank is turned over due to insufficient tightening of the fuel cap, the fuel cap is detached and fuel flows out. . Particularly in an aged society, the force for tightening the screw is reduced due to a decrease in grip strength, and therefore improvement is desired.

When fuel is supplied to the fuel tank,
The oil level rises to the valve of the refueling cap and the fuel in the refueling tank is supplied while maintaining the constant oil level by replacing the air.Therefore, the valve of the refueling port cap is always wet with fuel. If the fuel filler cap is removed when refueling the tank, the fuel adheres to the hand and slips when the screw is tightened, and at the same time, the hand becomes difficult or becomes dirty.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention eliminates a fuel tank for temporarily storing fuel, and feeds fuel in a fuel tank directly to a combustion section. The fuel filler cap of the fuel tank was prevented from getting wet by fuel.

The fuel tank in this case has a fuel filler port provided at an upper portion thereof, a fuel cap for closing the fuel filler port, and a fuel pump to be supplied to the oil feed pump when the fuel tank is mounted on the main body. A first connecting means for connecting to the lifting passage, and an oil feeding path communicating with the carburetor via the oil feeding tank and the oil feeding pump is formed through the connecting means, without turning over the oil feeding tank. The fuel can be supplied and mounted on the main body.

The first connecting means comprises an oil supply joint on the oil supply tank side and an oil supply joint receiver on the combustion section detachable from the oil supply joint, and the main body of the oil supply tank is mounted on the oil supply joint. Providing a valve mechanism that opens sometimes and closes when the fuel tank is removed from the main body can prevent fuel leakage when the tank is removed from the main body. Of course, it is also possible to adopt a mode in which a similar valve mechanism is provided in the oil transfer joint receiver, and the valves are opened when the tank body is mounted.

Further, if a second connecting means for connecting the carburetor to the fuel tank is provided, and a return oil path for the fuel which connects the carburetor and the fuel tank through the second connecting means is formed, Unburned gas from the fuel tank can be returned to the fuel tank.

The second connecting means comprises a return oil joint on the oil supply tank side and a return oil joint receiver on the combustion section detachable from the return oil joint, and the main body of the oil supply tank is mounted on the return oil joint. If a valve mechanism is provided that opens sometimes and closes when the fuel tank is removed from the main body, it is possible to prevent fuel leakage when the tank is removed from the main body, as in the case of the first connection means. Of course, it is also possible to adopt a mode in which a similar valve mechanism is provided in the return oil joint receiver, and the valves are opened when the tank body is mounted.

It is also possible to adopt a configuration in which the first connecting means and / or the second connecting means are provided with an impact preventing means for mitigating an impact to protect the connecting portion from an impact.

Further, if the first connecting means and the second connecting means are disposed above the fuel level of the fuel tank, it is possible to prevent the fuel in the tank full state from overflowing.

Further, a configuration may be adopted in which a means for shutting off the supply of fuel is provided in the oil supply path connecting the oil supply tank and the oil feed pump, and the supply of fuel is reliably shut off. Examples of the shutoff means include a solenoid valve and an air valve. The air valve is for taking in air for shutting off the supply of fuel, and its arrangement is not particularly limited. However, it is preferable that the air valve is arranged in the oil feed joint receiver of the first connection means. If this air valve is also arranged above the liquid level of the fuel in the fuel tank, it is possible to prevent the fuel in the tank full state from overflowing.

If the second connection means is provided with a pressure valve mechanism for adjusting the pressure in the fuel tank, it is possible to prevent fuel from overflowing from the tank due to a decrease in the tank internal pressure. The pressure valve mechanism is automatically opened when the main unit is mounted, if the oil supply tank is mounted on the main unit and the valve opens when connected to the main unit and closes when the fuel tank is removed from the main unit. The valve can be adjusted to adjust the tank internal pressure, and the valve is automatically closed when the main body is removed, so that leakage of fuel from the tank can be prevented.

A means for fixing a fuel suction passage from the fuel tank to the oil feed pump in the fuel tank is provided.
It is also possible to keep the suction passage from moving.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 is a schematic front view of a petroleum fan heater equipped with a liquid fuel combustion device according to a first embodiment of the present invention, and FIG. It is a schematic diagram.

As shown, the oil fan heater body 1
Is formed in a box shape and has a front plate 2 detachably provided, a top plate 3 formed integrally with the side surface, an operation unit 4 for operating a driving operation, and blowing hot air. An outlet 5 and an openable / closable lid 7 for opening and closing a fuel tank 6 are provided on the right side of the upper surface of the top plate 3. Is mounted and fixed.

The interior of the main body 1 is as shown in FIGS.
The tank guide 11 and the partition plate 16 allow the tank storage chamber 1a to store the fuel tank 6; the functional component storage chamber 1b to store the vaporizer 12 and the electromagnetic pump 13;
4 and a combustion section chamber 1c in which a combustion chamber 15 is arranged.

The tank storage chamber 1a has a removable cartridge type refueling tank 6 for temporarily storing fuel,
Oil supply path 30 for supplying the fuel in oil supply tank 6 to the carburetor side
0 and the oil supply tank 6 are detachably connected to each other, and the oil supply tank 6 is detachably connected to the return oil path 301 for returning the fuel gas from the carburetor 12 to the oil supply tank 6. Return oil side connection means 21 and 22 are arranged. At the bottom of the tank accommodating chamber 1a, there is provided a mounting table 1d having a cushioning property for absorbing and mitigating an impact applied to the connecting means 9, 10 and 21, 22 when the fuel tank is accommodated. Further, a guide portion is formed in the tank accommodation chamber 1a so that the oil supply side connection means 9, 10 and the return oil side connection means 21, 22 are securely fitted and connected when the oil supply tank 6 is accommodated. It is preferable to keep it.

The oil supply side connection means comprises an oil supply joint 9 having a suction pipe and a valve for opening and closing the passage, and an oil supply joint receiver 10 for receiving the valve of the oil supply joint 9. The oil feed joint receiver 10 is connected to an air valve 20 that takes in air into the oil feed path to shut off the oil feed path 300 supplied from the oil feed tank 6 to the electromagnetic pump (oil feed pump) 13. The oil feed joint receiver 10 is attached to a wall surface of a tank guide 11 whose upper part projects toward the functional component storage chamber.

The functional component storage chamber 1b includes a tank storage chamber 1a.
A vaporizer 12 for vaporizing fuel from the fuel tank 6, an electromagnetic pump 13 for sending fuel from the fuel tank 6 to the vaporizer 12, and a vaporizer 12. And a cooling fin 19 for cooling the unburned gas between the vaporizer 12 and the storage container 18.

The combustion section chamber 1c is partitioned by a partition plate 16, and includes a burner 14 for mixing and burning the fuel gas vaporized by the vaporizer 12 and the primary combustion air, and a combustion chamber 15 surrounding the burner 14 for combustion. , And a burner box 17 that accommodates the burner 14. The carburetor 12 and the burner 14 constitute a combustion section for burning fuel.

The oil feed path 300 is connected to the oil feed joint receiver 1.
A pipe 203 connecting the electromagnetic pump 13 to the vaporizer 12 is provided.
The return oil path 301 is provided between the vaporizer 12 and the cooling fin 1.
9, a pipe 206 connecting the cooling fin 19 and the storage container 18, and a pipe 207 connecting the storage container 18 and the return oil joint receiver 10. Each of these pipes 203 to 207 is formed of a copper pipe. In addition, the piping from the oil supply tank 6 to the electromagnetic pump 13 and the piping 207 may be piping other than copper piping, such as resin.

FIG. 3 is a schematic view of a fuel tank, FIG. 4 is a perspective view showing a connection portion of the fuel tank, FIG. 5 is a sectional view showing a connection state of an oil feed joint and a suction pipe in the fuel tank, and FIG. It is a structural diagram of a return oil joint.

As shown in the figure, the refueling tank 6 is made of a metal material having conductivity (for example, a galvanized steel plate) and is formed in a vertical box shape. Handle 23 installed on the top of the tank
A fuel supply port 26 disposed on the upper surface on which the handle 23 is provided, a fuel cap 24 with rubber packing for closing the fuel supply port 26, and a fuel supply cap 24 provided on a side surface near the fuel supply port 26. An oil meter 25 for visually confirming a state in which fuel has been supplied, and an oil supply joint 9 and a return oil joint 21 arranged on the upper surface on which the handle 23 is provided, opposite to the oil supply port 26. ing.

As shown in FIG. 5, the oil feed joint 9 has a horizontal L-shaped connection pipe 43 projecting from the upper surface of the oil supply tank 6 to the side of the tank, and a spindle type valve mechanism 28 provided at the end of the connection pipe 43. And a joint body 9a having a built-in.

The joint body 9a is formed in a vertical cylindrical shape, and a cylindrical small-diameter projecting cylinder 9b fitted on the oil feed joint receiver 10 side is formed on the lower surface thereof, and an O-ring for connection seal is formed on the outer peripheral portion thereof. 41 is fitted to the outside. Also,
An openable / closable lid nut 38 for inserting the valve mechanism 28 is screwed into the upper end opening of the joint body 9a.

The valve mechanism 28 in the joint body 9a includes a central valve hole 9c of the small-diameter projecting cylinder 9b of the joint body 9a,
Inverted conical valve seat 9 formed at the lower part in the joint body
d, a spindle-shaped valve body 31 that can be freely attached to and detached from the valve body; a spring 35 interposed between the upper end of the valve body 31 and the lid nut 38 to urge the valve body 31 in the valve closing direction; An O-ring 33 for sealing is fitted on the seat-side peripheral surface, and the lower end of the valve body 31 projects downward from the small-diameter projecting cylinder 9b in the valve closed state.

The connection pipe 43 has a suction passage 43a formed therein to communicate with a valve chamber in the joint body 9a.
The end protruding to the side of the tank is the joint body 9
a is integrally connected to the side portion. The lower end of the connection pipe 43 is inserted into the inside of the tank through an insertion hole 46 on the upper surface of the refueling tank 6, and a flange 43 b formed on the lower part is fixed to a hole 47 on the upper surface of the refueling tank 6 via a rubber packing 50 with a screw. ing. A male screw is engraved on the outer peripheral surface of the lower end of the connection pipe 43, and the upper end of the suction pipe 27 in the oil supply tank is screwed to the male screw.

The suction pipe 27 reaches near the bottom surface of the fuel tank 6 and has a suction port 44 formed at a lower end side thereof. The suction port 44 may be provided on the bottom surface of the lower end of the suction pipe 27.

The suction pipe 27 has a notched hole formed in a suction pipe fixing plate 50 formed in a crank shape after the filter 45 is inscribed in the suction port 44 in a state before the right and left adrilling processing of the oil supply tank 6. The suction tank 27 is passed through 50a, and then the oil tank 6 is assembled by performing right and left addressing processes. The suction pipe 27 is fixed to the fixing plate 5.
Since it is fixed at 0, the movement is restricted when the fuel tank 6 is carried, so that the suction port 44 of the suction pipe 27 does not come into contact with the inner wall of the fuel tank 6, and the damage can be prevented.

On the other hand, as shown in FIG. 6, the return oil joint 21 is arranged side by side on the upper surface of the oil supply tank 6 together with the oil supply joint 9, and is not connected to the suction pipe 27. Except that the pressure valve mechanism 700 of No. 6 is provided, the structure is basically the same as that of the oil feed joint 9. Therefore, the structure other than the above difference will be briefly described.

The return oil joint 21 is, as shown in FIG.
A joint body 21 having a lateral L-shaped connection pipe 30 projecting from the upper surface of the refueling tank 6 to the side of the tank and a spindle type valve mechanism 29 provided at the end of the connection pipe 30
a.

The joint main body 21a is formed in a vertical cylindrical shape, and a cylindrical small-diameter projecting cylinder 21b is formed on the lower surface of the joint main body 21a so as to be fitted to the oil joint receiver 22 side. Reference numeral 42 is externally fitted.
A valve mechanism 2 is provided at the upper end opening of the joint body 21a.
9 and an openable / closable cover nut 40 for inserting the pressure valve mechanism 700 are screwed.

The valve mechanism 29 in the joint body 21a is
Central valve hole 2 of small-diameter projecting cylinder 21b of joint body 21a
1c and a spindle-shaped valve element 32 which can be freely attached to and detached from an inverted conical valve seat 21d formed at a lower portion in the joint body.
And a spring 36 for urging the valve body 32 in the valve closing direction.
And an O-ring 34 for sealing fitted to the peripheral surface of the valve body 32 on the valve seat side.

The valve body 32 projects downward from the small-diameter projecting cylinder 21b with its lower end closed.
A push rod 709 capable of pressing the ball valve 703 of the pressure valve mechanism 700 is integrally formed on the upper end side. Spring 36
Is interposed between the upper surface of the valve body 32 and the lower surface of a valve seat 702 of the pressure valve mechanism 700 described later.

The connection pipe 30 has a return passage 30a formed therein to communicate with the valve chamber in the joint body 21a.
The end protruding to the side of the tank is the joint body 2
1a is integrally connected to the side portion. The lower end of the connection pipe 30 is inserted into the tank through an insertion hole 48 on the upper surface of the refueling tank 6, and a flange 30 b formed on the lower portion is fixed to a hole 49 on the upper surface of the refueling tank 6 via a rubber packing 51 with a screw. ing.

In the present embodiment, in order 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 to raise the liquid level in the tank and cause fuel leakage,
A pressure valve mechanism 700 is provided on the return oil joint 21.

The pressure valve mechanism 700 includes a cylindrical valve seat 702 having a valve hole 701 disposed above the valve body 32, and a closing surface in a valve chamber above the valve hole 701 of the valve seat 702. A ball valve 703 which can be freely attached to and detached from, a spring 704 for urging the ball valve 703 toward a seating side, and a lid nut 40 for positioning the valve seat body 702 in the joint body 21a. .

A pressure release hole 705 is formed in the center of the cover nut 40, and a spring 704 is interposed between the ball valve 703 and the cover nut 40. Valve hole 7
01 is set to a diameter through which the push rod 709 of the valve body 32 can penetrate, and when the return oil joint 21 is fitted and connected to the return oil joint receiver 22 and the valve body 32 is pushed upward, the push rod is pushed. 709 penetrates through the valve hole 701 and pushes up the ball valve 703 to open the valve hole 701, and the connection pipe 3
0 and the pressure release hole 705 in the tank and the lid nut 40
Are connected.

In the oil transfer joint 9 and the return oil joint 21, the valve elements 31 and 32 of the joint body are set downward and are arranged at the same level, and the oil transfer joint 9 and the return oil joint 21 are arranged upward to face these. The joint receiver 10 and the return oil joint receiver 22 are fitted and connected in the vertical direction. Therefore, the refueling tank 6 is connected to the tank chamber 1
The two connecting means 9, 10 and 21, 22 can be smoothly connected only by mounting from above a. The first connection means on the oil supply side and the second connection means on the return oil side have a configuration in which the fuel tank is mounted above the liquid level of the fuel tank when the fuel tank has expired when the main body of the tank is mounted. As a result, it is possible to prevent fuel that is full from the tank from overflowing from the tank.

FIG. 7 is a structural diagram of the oil supply side connection means 9 and 10,
FIG. 8 is a structural view of the oil feed joint receiving portion, and FIG. 9 is a structural view of the return oil side connection means. As shown in the figure, the tank accommodation room 1
In FIG. 3A, an oil feed joint receiver 10 and a return oil joint receiver 22 are arranged below the oil feed joint 9 and the return joint 21 in the tank storage state of the oil feed tank 6.

As shown in FIG. 8, the oil feeding joint receiver 10 has a concave receiving portion 61 having a circular cross section, which is opened on the upper surface of a cylindrical receiving main body 10a and allows the lower end small diameter projecting cylinder 9b of the oil feeding joint 9 to be interposed. A valve mechanism 60 is provided in the receiving portion 61 and opens and closes by contact pressure and separation from the valve body 33 of the valve mechanism 28 of the oil feed joint 9.

An annular sealing surface 67 is formed at the upper end of the concave receiving portion 61 so as to be in close contact with the periphery of the small-diameter projecting cylinder 9b of the oil feed joint 9. Further, a valve receiving housing 68 is recessed on the bottom surface of the receiving portion 61, and a valve receiver 65 is fitted into the valve receiving housing 68. The valve receiver 65 is provided with a valve hole 6 communicating with a valve chamber 60a formed at a lower portion of the receiver main body 10a.
0b is formed, and a lattice-shaped passage 66 around which fuel flows is formed.

The valve mechanism 60 includes a valve body 62 which can be freely attached to and detached from the valve seat of the valve chamber 60a, and whose upper end projects through the valve hole 60b toward the receiving portion 61, a head of the valve body 62 and a valve receiver 65. And a spring 6 for urging the valve body 62 in the valve closing direction.
3 and an O-ring 64 that is externally fitted on and close to the valve chamber 60a side of the valve body 62 and seals between the valve seat and the valve seat. The valve mechanism 60 opens when the valve body 33 of the oil supply joint 9 contacts the head of the valve body 62 on the receiving side, and closes when the valve body 33 is separated from the head of the valve body 62. ing.

A passage 69 communicating with the pipe 203 connected to the electromagnetic pump 13 is formed below the valve chamber 60a of the receiving body 10a, and a passage of the air valve 20 is formed on the side of the valve chamber 60a. 70 is communicated. This air valve 20
The passage 70 is disposed above the level of the fuel in the fuel tank when the fuel tank is full, so that the fuel from the tank can be prevented from overflowing.

The air valve 20 is provided for introducing air for shutting off the fuel in the oil supply path 300 from the oil supply tank 6 to the electromagnetic pump 13 into the oil supply path 300, and is provided in the air intake passage of the valve body. Arranged valve 20a
And the valve element 20 which is disposed on the outer peripheral
a to move the valve a in the valve closing direction of the passage 70
And a spring 20c for urging the valve 20a in the valve opening direction.
And

The operation of the air valve 20 is such that the air valve 20 is in a closed state during operation and is opened during a stop to take in air that shuts off fuel in the oil supply path 300. Further, the air valve 20 has a function of sucking air in an open state at the time of baking cleaning of the vaporizer 12 and sucking air and driving the electromagnetic pump 13 to send air to the vaporizer 12.

On the other hand, the return oil joint receiver 22 has basically the same structure as the oil feed joint receiver 10 except that the air valve 20 does not exist. Therefore, the structure thereof will be briefly described.
As shown in FIG. 9, is opened and closed by contact pressure and separation between a concave receiving portion 72 formed on the upper surface of the receiving main body 22a and the valve body 32 of the valve mechanism 29 of the return oil joint 21 disposed on the receiving portion 72. And a valve mechanism 71.

An annular sealing surface 78 is provided at the upper end of the receiving portion 72.
Is formed, and a valve receiver 76 is fitted in a valve receiver housing 79 which is recessed on the bottom surface of the receiver 72. The valve receiver 76 is formed with a valve hole 71b communicating with the lower valve chamber 71a of the receiving body 22a, and has a lattice-shaped passage 77 around which fuel flows.

The valve mechanism 71 includes a valve body 73 which can be freely attached to and detached from the valve seat of the valve chamber 71a and whose upper end projects through the valve hole 71b toward the receiving portion 72, and a head of the valve body 73 and the valve receiver 72. , Which urges the valve body 73 in the valve closing direction.
4 and a sealing O-ring 75 closely fitted to the valve chamber 71a side of the valve body 73.
The valve body 32 opens when the head of the valve body 73 on the receiving side comes into contact with the head, and closes when the head is separated from the head of the valve body 73. A passage 80 communicating with a pipe 207 connected to the storage container 18 is formed below the valve chamber 71a of the receiving main body 22a.

In the construction of the oil tank 6 and the connecting means 9, 10 and 21, 22, when the oil tank 6 is set in the tank accommodating chamber 1a of the main body 1 from above, the oil feeding joint 9 and the return oil joint of the connecting means are connected. O-rings 41, 42 are mounted on predetermined positions of the oil feed joint receiver 10 and the return oil joint receiver 22, and are outside the small-diameter protrusions 9b, 21b of each of the joint bodies 9a, 21a.
Is sealed by the seal surface 67 of the oil feed joint receiver 10 and the seal surface 78 of the return oil joint receiver 22 to be in a sealed state. At the same time, the valve mechanisms 28 and 29 of the respective joints and the valve bodies of the receiving side valve mechanisms 60 and 71 press each other to open the valve.

Further, on the return oil joint 21 side, when the valve element 32 is opened, the valve element 32 moves upward, and the upper push rod 709 moves upward from the valve hole 701 of the pressure valve mechanism 700. Since the ball valve 702 is pushed upward,
The valve hole 701 is opened. Therefore, a communication passage is formed from the inside of the tank through the connection hole 30 and the valve hole 701 and the pressure release hole 705 in the joint main body 21a, making the tank internal pressure equal to the tank external pressure, and preventing fuel leakage due to temperature rise in the tank. can do.

[Structure of vaporizer and burner] FIG. 10 is a diagram showing the structure of the vaporizer and the burner. As shown, the vaporizer 12 includes a vaporizing element 81 that heats and vaporizes the fuel, and a nozzle 8 that ejects the fuel gas vaporized by the vaporizing element 81.
2, a needle 83 for opening and closing the hole of the nozzle 82,
A solenoid valve 84 connected to the needle 83 to move the needle 83; a fuel inlet 85 for supplying fuel to the vaporizing element 81; a return circuit 86 for supplying fuel gas inside the vaporizer 12 when the operation is stopped; The heat recovery section 87 recovers combustion heat.

The vaporizing element 81 is obtained by sintering fine ceramic particles into a cylindrical shape, and tar generated when the fuel is vaporized is deposited from the surface of the vaporizing element 81 toward the inside. The fuel inlet 85 of the carburetor 12 has a double structure of an outer stainless steel pipe 88 and an inner copper pipe 89. The stainless pipe 88 was used for the vaporizer 1
This is to reduce the heat conduction from the fuel cell 2 and suppress the temperature rise of the fuel entering the vaporizer 12. Further, the diameter of the stainless steel pipe 88 is larger than that of the copper pipe, so that heat conduction transmitted from the stainless steel pipe 88 to the copper pipe is further suppressed. The tip of the copper pipe 89 is connected to the vaporizer 1
2 to the position outside.

The solenoid valve 84 has an electromagnetic coil 90
, Movable piece 91, suction piece 92, pressing spring 9
The movable piece 91 is attracted to and detached from the attracting piece 92 by energizing / de-energizing the electromagnetic coil 90, and the needle 83 attached to the movable piece 91 is moved, and The hole of the nozzle 82 is opened and closed.

The burner 14 comprises a mixing pipe 94 for mixing the combustion gas vaporized by the vaporizer 12 with the primary combustion air, and a flame port 95 for burning the mixed combustion gas.

[Configuration of Electromagnetic Pump, Storage Container, and Cooling Fins] As shown in FIG. 2, the electromagnetic pump 13 is for sucking up the fuel in the fuel tank 6 and sending it to the carburetor 12 side. The fuel discharge amount and the like are controlled by the section.

FIG. 11 is a sectional view of the storage container. As shown in the drawing, the storage container 18 is configured to stop the electromagnetic pump 13 in the room temperature control and to stop
When the unburned gas remaining in the vaporizer 12 is returned to the refueling tank 6 due to the blockage of the second nozzle 82, the returned portion is temporarily stored and cooled.

The container body 96 of the storage container 18 is closed, and its capacity is set to about 20 CC. As described above, when the unburned gas remaining in the vaporizer 12 is returned to the refueling tank 6, the unburned gas is liquefied to become a fuel gas. 3
０．５0.5 CC / time. Assuming that the number of times that the electromagnetic pump 13 is stopped by changing the combustion amount under room temperature control when the oil fan heater is operated during the day is about 10 times, the return amount of the unfueled gas per day is about 3 to 5 CC. Become. Therefore,
The container body 96 has a capacity (about 20 CC) that can sufficiently store the return amount.

The side of the container body 96 has a vaporizer 12
A fuel gas inlet 97 is formed, and an outlet 98 of the fuel gas collected in the container body 96 is formed on the upper surface of the container body 96. A pipe 99 is provided at the outlet 98 on the upper surface of the container to reach near the bottom surface inside the container body 96,
The lower end is formed as a trumpet-shaped suction port 200 so that fuel accumulated in the container is easily sucked without generating surface tension.

FIG. 12 is a cross-sectional view of a cooling fin 19 provided in a path connecting the vaporizer 12 and the storage container 18. As illustrated, the cooling fins 19 are formed by forming a large number of thin fins 201 outside the pipe 202 and play a role of radiating heat of the unburned gas returning from the vaporizer 12.

[Operation of Oil Fan Heater] The operation of the oil fan heater will be described. After opening the lid 7 of the main body 1 and taking out the empty fuel tank 6 by holding the handle 23 of the fuel tank 6, the fuel cap 24 is opened with the handle 23 turned upward, and the fuel port 26 is opened. Refuel.

When the refueling is completed, the refueling tank 6 containing the fuel is set at a predetermined position by opening the lid 7 of the main body 1. Then, as shown in FIGS. 7 and 9, the respective valve bodies 31 and 32 of the valve mechanism 28 of the oil supply joint 9 and the valve mechanism 29 of the return oil joint 21 of the oil supply tank 6 are connected to the valve mechanism 60 of the oil supply joint receiver 10. And return oil joint receiver 2
The second valve mechanism 71 holds the respective valve elements 62 and 73, and the valve element 6
2, 73 is lowered.

The heads 62a, 7a of these valve bodies 62, 73
When 3a hits the upper surfaces of the valve receivers 61 and 72, the respective valve bodies 31 and 32 of the valve mechanism 28 of the oil feed joint 9 and the valve mechanism 29 of the return oil joint 21 move upward and urge in the valve closing direction. The springs 35 and 36 which have been compressed are in a compressed state, and the closing surfaces O-rings 33 and 34 of the valve bodies 31 and 32 form gaps between the oil feeding joint 9 and the respective closing faces of the return oil joint 21. An oil supply path 300 through which fuel flows toward the electromagnetic pump 13 and a return oil path 301 from the storage container 18 to the oil supply tank 6 are opened.

When the operation switch (not shown) of the oil fan heater is operated to turn on the power, the vaporizer heater (not shown) attached to the vaporizer 12 causes the vaporizer 1 to operate.
2 is heated. At this time, the temperature of the vaporizer 12 is detected by a vaporizer thermistor (not shown). When the vaporizer 12 is heated to a predetermined temperature, the electromagnetic pump 13 is driven to drive the liquid fuel in the fuel tank 6. Is sucked up through the suction pipe 27 and sent to the vaporizer 12 via the oil feed joint 9 and the oil feed joint receiver 10. Heated vaporizer 1
The liquid fuel is gasified by 2 and is blown out from the flame port 95 of the burner 14, ignited by the flame □ 95 and burned in the combustion chamber 15.

At this time, the control unit 950 controls the operation of the electromagnetic pump 13 based on the difference between the room temperature detected by the room temperature sensor 153 (thermistor) and the temperature set by the room temperature setting switch 157 of the operation unit. Vaporizer 1
By changing the amount of liquid fuel sent to 2, the amount of heat generated by combustion is appropriately adjusted.

When the combustion is started and the flame sensor detects a flame current equal to or greater than a preset current value, the fan motor is energized and the blower fan rotates to suck the room air. The rotation speed is controlled by the control unit.
The sucked indoor air deprives the radiant heat obtained in the combustion chamber 15 and blows out the hot air along with the combustion gas from the outlet 5 to the outside (room) of the main body 1 so that the room temperature rises and is controlled at an optimum temperature. .

[Second Embodiment] FIG. 13 is a plan view of a connection means according to a second embodiment, FIG. 14 is a front view of the connection means, FIG. 15 is a sectional view of an oil feed joint side, and FIG. 17 is a sectional view of the joint receiving side, and FIG. 18 is a front view of the same.

As shown in the figure, in the present embodiment, in the connection means on the oil supply side and the connection means on the return oil side, the oil supply joint 9 and the return oil joint 21 are integrated, and the oil supply joint receiver 10 and the return oil joint The point that the joint receiver 22 and the air valve 20 are integrated, the oil cover 9 and the return oil joint 21 have a protective cover 8 as an impact preventing means.
The first embodiment differs from the first embodiment in the point that the oil supply joint 00 is provided and in that the valve mechanism of the oil feed joint receiver 10 is eliminated. In other respects, a configuration basically similar to that of the first embodiment is adopted. ing. Therefore, only the above differences will be described in detail.

As shown in the figure, the oil feed joint 9 and the return oil joint 21 are provided side by side on the upper side surface of the oil supply tank 6, but the oil supply tank side of these joint bodies 9a and 21a is integrated by a connecting plate 801. The connecting plate 801 is screwed to the side wall of the fuel tank 6 via a seal member 802.

Further, the reinforcing plate 8 having a substantially U-shape in a top view so as to surround three sides of the oil feed joint 9 and the return oil joint 21.
04 is fixed to the connecting plate 801 and the protective cover 800 made of resin is in contact with the outer surface thereof.
6 is fixed to the reinforcing plate 804 by the oil feed joint 9
Further, the impact applied to the return oil joint 21 is reduced. Therefore, the joint portion can be protected from impact when the fuel tank 6 is carried or when the fuel tank 6 is mounted on the main body.

On the other hand, the oil feed joint receiver 10 and the return oil joint receiver 22 are also provided side by side on the chamber wall of the tank housing chamber, but these joint bodies 10a and 22a are also integrated by the connecting body 810, and are further fed. The air valve 20, which is connected to the valve chamber of the oil joint receiving body 10a through the communication passage 70, is also integrally connected to the receiving body 10a.

However, the oil transfer joint receiver 10 has a concave receiving part 61 having a circular cross section which opens on the upper surface of the cylindrical receiving main body 10a and allows the small-diameter projecting cylinder 9b at the lower end of the oil transfer joint 9 to intervene. 61 is provided with a projection 812 projecting upward from the center and contacting the valve mechanism 31 of the valve mechanism 28 of the oil feed joint 9 to open the valve mechanism 28 of the oil feed joint 9. A communication path 70 to the air valve 20 and a communication path (not shown) to the electromagnetic pump 13 are formed in the groove 813.

The structure and function of the return oil joint receiver 22 are basically the same as those of the first embodiment. However, in the valve mechanism 71 provided in the receiving body 22a of the return oil joint receiver 22, the spring 63 for urging the valve body 62 in the valve closing direction is connected to the bottom wall and the valve body in the valve chamber 60a of the receiving body 22a. 62 is different from that of FIG. The valve mechanism 71 is provided to prevent the unfueled gas from leaking out of the vaporizer 12 when the fuel tank 6 is taken out of the main body, thereby preventing the generation of odor.

In the construction of the oil supply tank 6 and the connection means 9, 10 and 21, 22, when the oil supply tank 6 is set in the tank accommodating chamber 1a of the main body 1 from above, the oil supply joint 9 of the connection means and the return oil joint O-rings 41, 42 are mounted on predetermined positions of the oil feed joint receiver 10 and the return oil joint receiver 22, and are outside the small-diameter protrusions 9b, 21b of each of the joint bodies 9a, 21a.
Is sealed by the seal surface 67 of the oil feed joint receiver 10 and the seal surface 78 of the return oil joint receiver 22 to be in a sealed state. At the same time, the valve mechanism 28 of the oil feed joint 9 is pushed by the projection 812 on the receiving side to open the valve, and the valve mechanism 29 of the return oil joint 21 is opened by the valve elements of the receiving valve mechanism 71 pressing each other. It becomes a valve state.

Further, on the return oil joint 21 side, when the valve body 32 is opened, the valve body 32 moves upward, and the upper push rod 709 moves upward from the valve hole 701 of the pressure valve mechanism 700. Since the ball valve 702 is pushed upward,
The valve hole 701 is opened. Therefore, a communication passage is formed through the valve hole 701 and the pressure release hole 705 in the joint main body 21a through the connection pipe 30a into the tank, the tank internal pressure is made equal to the tank external pressure, and fuel leakage due to temperature rise in the tank is reduced. It is possible to prevent a negative pressure in the tank. The other configuration and operation and effect are the same as those of the first embodiment, and the description thereof is omitted.

[Other Embodiments] The present invention is not limited to the above embodiment of the present invention, and many modifications and changes can be made within the scope of the present invention. For example, in the above-described embodiment, the configuration in which the oil supply joint and the return oil joint are respectively extended from the upper surface of the oil supply tank to the side has been exemplified. A configuration may be adopted. Further, the refueling port of the refueling tank may be arranged not only on the upper surface but also on the side surface of the tank as long as it is located on the upper portion of the tank.

[0086]

As described above, according to the present invention,
Since the fuel tank to temporarily store fuel was abolished and the fuel in the refueling tank was sent directly to the oil pump,
It is not necessary to attach the filler port of the filler tank to the fuel tank, the filler cap is not wetted by the fuel of the fuel tank, and the number of components can be reduced since the fuel tank is not required.

In addition, connecting means are provided in an oil supply path for sending fuel from the fuel tank to the combustion section and / or a return oil path from the combustion section to the fuel tank, and these connection means are provided when the main body of the fuel tank is mounted. Since a valve mechanism is provided that opens and closes when the tank is removed from the main body, fuel does not leak when the tank is removed from the main body.

Further, since an air valve for taking in air for shutting off the supply of fuel is provided in the oil supply path, the supply of fuel can be shut off reliably. Further, since the pressure valve mechanism for adjusting the tank internal pressure using the return oil joint of the second connection means is provided, even if a pressure difference occurs between the inside and outside of the tank due to a temperature difference between the inside and outside of the tank, this is eliminated. The fuel can be prevented from overflowing from inside the tank, and the inside of the tank does not become negative pressure, so that the suction of the fuel and the fluctuation of the suction amount can be prevented.

[Brief description of the drawings]

FIG. 1 is a front partial sectional view of an oil fan heater according to an embodiment of the present invention.

FIG. 2 is a block diagram of the same liquid fuel combustion device.

FIG. 3 is a schematic diagram of a fuel tank.

FIG. 4 is a perspective view of a connection portion of the fuel tank.

FIG. 5 is a sectional view of the structure of the oil supply joint.

FIG. 6 is a structural sectional view of the return oil joint.

FIG. 7 is a sectional view of the structure of the oil-supplying-side connecting means.

FIG. 8 is a sectional view of a structure of an oil supply joint receiving portion.

FIG. 9 is a sectional view of the structure of the return oil side connection means.

FIG. 10 is a structural diagram of a burner and a vaporizer.

FIG. 11 is a structural diagram of the storage container.

FIG. 12 is a structural diagram of a cooling fin.

FIG. 13 is a plan view of a connection unit according to the second embodiment.

FIG. 14 is a front view of the same.

FIG. 15 is a cross-sectional view of the oil supply joint side.

FIG. 16 is a sectional view of the return oil joint side.

FIG. 17 is a sectional view of a joint receiving side.

FIG. 18 is a front view of the same.

FIG. 19 is a partially omitted front sectional view showing an example of a conventional oil fan heater.

FIG. 20 is a side sectional view schematically showing an oil fan heater.

FIG. 21 is a sectional view of a fuel tank and a receiving device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 oil fan heater main body 2 front plate 3 top plate 4 operation unit 5 outlet 6 oil supply tank 7 lid 8 table 9 oil feed joint 10 oil feed joint receiver 11 tank guide 12 carburetor 13 electromagnetic pump 14 burner 15 combustion chamber 16 partition plate 17 burner box 18 storage container 19 cooling fin 20 air valve (means for shutting off) 21 return oil joint 22 return oil joint receiver 23 handle 25 oil meter 27 suction pipe 700 pressure valve mechanism 800 protective cover 801 connecting plate 810 connecting body

Continued on the front page (72) Inventor Masahiko Goto 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Inside (72) Inventor Mamoru Morikawa 22-22 Nagaikecho, Abeno-ku, Osaka City, Osaka Inside Sharp Corporation F term (reference) 3K068 AA15 BB02 BB12 CA16 CA25 CB03 CB11 CB15

Claims (13)

[Claims] 1. A fuel tank which is detachable in an apparatus main body, a vaporizer for heating and vaporizing fuel, an oil feed pump for feeding fuel from the fuel tank to the vaporizer, and a burner for burning the vaporized fuel gas. A liquid fuel combustion device, wherein a fuel tank for temporarily storing fuel is disposed below the fuel tank, and the fuel is directly fed from the fuel tank to an oil pump. 2. A fuel supply tank which is detachable in the apparatus main body, a vaporizer for heating and vaporizing the fuel, an oil feed pump for feeding the fuel in the fuel tank to the vaporizer, and a burner for burning the vaporized fuel gas. In the liquid fuel combustion apparatus provided, a fuel supply port for injecting fuel into the fuel tank, a fuel cap for closing the fuel port, and a fuel suction passage to an oil pump when the fuel tank is mounted on the main body are connected. 2. The liquid fuel combustion apparatus according to claim 1, further comprising a first connection means, wherein an oil supply path communicating with the carburetor via the oil supply tank and the oil supply pump is formed through the connection means. 3. The liquid fuel combustion apparatus according to claim 1, further comprising means for fixing a fuel suction passage from the fuel tank to the oil feed pump in the fuel tank. 4. The first connection means includes an oil supply joint on the oil supply tank side and an oil supply joint receiver on the combustion section side where the oil supply joint is detachable, and the oil supply joint is connected to the oil supply tank. 4. The liquid fuel combustion device according to claim 1, further comprising a valve mechanism that opens when the main body is mounted and closes when the fuel tank is removed from the main body. 5. As means for interrupting the supply of fuel in the middle of an oil supply path connecting the oil supply tank and the oil supply pump,
The liquid fuel combustion device according to any one of claims 1 to 4, further comprising an air valve. 6. A liquid fuel combustion apparatus according to claim 5, wherein said air valve is provided in said oil feed joint receiver. 7. A refueling tank which is detachable in the apparatus main body, a vaporizer for heating and vaporizing the fuel, an electromagnetic pump for feeding the fuel in the fueling tank to the vaporizer, and a burner for burning the vaporized fuel gas. In the liquid fuel combustion device provided,
The fuel supply system according to claim 1, further comprising a second connection unit that connects the carburetor to the fuel tank, wherein a fuel return oil path is formed through the second connection unit to connect the carburetor and the fuel tank.
7. The liquid fuel combustion device according to any one of 6. 8. The return oil joint according to claim 2, wherein the second connection means comprises a return oil joint on the oil supply tank side and a return oil joint receiver on the combustion section detachable from the return oil joint. 8. The liquid fuel combustion device according to claim 7, further comprising a valve mechanism that opens when the main body is mounted and closes when the fuel tank is removed from the main body. 9. The liquid fuel combustion device according to claim 8, wherein the return oil joint is provided with a pressure valve mechanism for adjusting a pressure in an oil supply tank. 10. The pressure valve mechanism according to claim 1, wherein an oil supply tank is mounted on the apparatus main body, the valve is opened when connected to the oil supply tank, and closed when the oil supply tank is taken out from the main body. 10. The liquid fuel combustion device according to item 9. 11. The first connection means and / or the second connection means.
The liquid fuel combustion apparatus according to any one of claims 1 to 10, further comprising: an impact preventing unit configured to reduce an impact in the connecting unit. 12. The liquid fuel combustion apparatus according to claim 1, wherein said first connecting means and said second connecting means are disposed above a fuel level of a fuel tank. 13. A liquid fuel combustion apparatus according to claim 1, wherein said air valve is disposed above a liquid level of fuel in a fuel tank.