JP2001182932A - Liquid fuel combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid fuel combustion device to eliminate a need for a service tank to be brought into upside down when liquid fuel is supplied to the service tank, and when the service tank to have completed supply of liquid fuel is mounted on a body case and capable of supplying liquid fuel without adhering liquid fuel to hands. SOLUTION: A liquid fuel combustion device is provided in a body case 1 with a removable service tank 8, a vaporizer 12 to heat liquid fuel for vaporization, a pump 13 to feed liquid fuel in the service tank 8 to the vaporizer 12, and a burner 14 to burn fuel gas generated by the vaporizer 12. The service tank 1 is provided with a fuel filler 28 formed in a portion of an upper part when the service tank is mounted on the body case, and a cap 29 to seal the fuel filler 28. Connecting means 9 and 10 are provided to cause the service tank 8 and a pump to communicate with each other and be connected to each other when the service tank 8 is mounted on the body case 1.

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 As is well known, a liquid fuel combustion device such as an oil fan heater is widely used in ordinary households as a heating device for heating a room in winter. 13 is a partially omitted front cross-sectional view of an example of a conventional liquid fuel combustion device, FIG. 14 is a side cross-sectional view of FIG. 13, and FIG. 15 is an enlarged cross-sectional view of a cap of a refueling tank and a holder thereof.

As shown in FIG. 13, in this liquid fuel combustion device, a liquid fuel such as kerosene is stored in a main body case 101, and a removable fuel tank 102 is disposed below the fuel tank 102. A fuel tank 103 connected to the fuel tank 102, a vaporizer 104 for heating and vaporizing the liquid fuel, and a pipe 105 for attaching the liquid fuel L attached to the fuel tank 103 and supplied from the fuel tank 102 to the fuel tank 103. And a burner 107 for burning the fuel gas generated by the vaporizer 104. Reference numeral 108 denotes a combustion chamber, on which a burner 107 is supported and fixed.

The liquid fuel guided to the vaporizer 104 is vaporized by a vaporizer heater (not shown) to become a fuel gas, and this fuel gas is injected vigorously from a nozzle (not shown) and burner 107 together with combustion air. And the flame 107
a, the air in the combustion chamber 108 is heated. Then, as shown by an arrow in FIG. 14, the heated air is supplied to the main body case 101 along with room air and fuel gas sucked into the main body case 101 by a blower fan 109 provided on the back side of the main body case 101. Is discharged into the room through an outlet 110 provided on the front of the vehicle. A fan motor 111 drives the blower fan 109, and is configured by a single-phase induction motor or the like. Reference numeral 112 denotes a main body case 10
1 is a filter attached to a suction port of air to be sucked into 1.

A flame sensor 1 for detecting a flame current due to a combustion flame is provided above a flame opening 107a of the burner 107.
When the frame sensor 113 detects a flame current equal to or greater than a preset value, a control device (not shown) energizes the fan motor 111, whereby the blower fan 109 rotates and sucks air from the room. The air becomes warm air and is blown into the room from the outlet 110. In addition,
A room temperature thermistor 114 detects the room temperature, and the control device controls the electromagnetic pump 106 based on the difference between the detected room temperature and the set temperature to adjust the supply amount of the liquid fuel to the vaporizer 104. The heating power of the combustion flame in the burner 107 is adjusted. For example, if the operation is started when the room temperature is low, the supply amount of the liquid fuel to the vaporizer 104 increases, and the room temperature rapidly rises to the set temperature. Thereafter, the supply amount of the liquid fuel is adjusted to set the room temperature. It is kept constant around the temperature.

When replenishing the fuel tank 102 with liquid fuel, the fuel tank 102 is detached from the main body case 101, turned upside down, and a cap 116 screwed to a base (fuel filler) 115 (see FIG. 15) is attached. Removal, base 1
The liquid fuel is injected from the fuel tank 10 through the fuel tank 10.
After confirming that the oil has been sufficiently replenished in the tank 2 with an oil meter (not shown), a cap 116 is screwed into the cap 115, the oil tank 102 is turned upside down, and inserted into the main body case 101.
The cap 116 of the refueling tank 102 is inserted into a bottomed cylindrical receiving member 117 provided on the upper surface of the fuel tank 103, and the refueling tank 102 is mounted on the fuel tank 103.
Thereby, the valve 118 provided in the cap 116 is provided.
Is pushed up by a protrusion 119 provided in the receiving tool 117, the fuel tank 102 and the fuel tank 103 communicate with each other, and the liquid fuel is supplied from the fuel tank 102 to the fuel tank 103.

[0007]

In the above-described conventional liquid fuel combustion apparatus, when the fuel tank 102 is replenished with liquid fuel, the fuel tank 102 is taken out of the main body case 101 and then the cap 116 is turned upward. It is necessary to turn the fuel tank 102 upside down, and after refilling the liquid fuel, the fuel tank 102 must be turned upside down again before the fuel tank 102 is inserted into the main body case 101, which is troublesome to handle. There was a point.

The cap 116 is screwed to the base 115. If the cap 116 is not tightened properly, the cap 116 is disengaged when the fuel tank 102 is turned upside down, and liquid fuel is removed. There was a problem of outflow. In particular, in an aging society in recent years, the tightening force of the cap 116 has decreased due to a decrease in the grip strength of the user, and improvement has been desired.

Further, the fuel tank 102 is
3, the oil level reaches the valve 118,
Since the liquid fuel in the fuel tank 102 is supplied to the fuel tank 103 while the height of the oil level is kept constant by the replacement of air, the valve 118 is always in a state of being wet with the liquid fuel. When the cap 116 is removed to replenish the liquid fuel, the liquid fuel adheres to the hand, and when the cap 116 is tightened, the hand slips and the hand becomes dirty and smells.

Further, when cleaning the impurities in the vaporizer 104 by baking, the fuel tank 102 is taken out of the main body case 101 and the liquid fuel remaining in the fuel tank 103 provided below the fuel tank 102 is removed. It is necessary to perform an operation of removing the water with a pump or the like, which is troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to eliminate the necessity of reversing the fuel tank when refilling the fuel tank with liquid fuel.
It is another object of the present invention to provide a liquid fuel combustion device capable of replenishing liquid fuel without attaching liquid fuel to hands.

It is another object of the present invention to provide a liquid fuel combustion apparatus which can easily perform the bake cleaning of a vaporizer.

[0013]

According to a first aspect of the present invention, a removable fuel tank, a vaporizer for heating a liquid fuel to vaporize the fuel, and a fuel tank are provided. A liquid fuel combustion device comprising: a pump that sends liquid fuel in a tank to the vaporizer; and a burner that burns fuel gas generated by the vaporizer, wherein the refueling tank is mounted on the main body case. Connecting means for providing an oil supply port provided at an upper portion of the oil supply port and a cap for sealing the oil supply port, and connecting the oil supply tank to the pump when the oil supply tank is mounted on the main body case. It is characterized by having.

According to such a configuration, the fuel tank is
Because it is attached to the main body case with the filler port up,
It is not necessary to turn the fuel tank upside down when the fuel tank is removed from the main body case to replenish the liquid fuel and when the refueling is completed and the fuel tank is mounted on the main body case. Further, since the fuel tank and the pump are connected to each other through the connection means, the outer surface of the cap is not contaminated with the liquid fuel, and the liquid fuel does not adhere to the hand when the fuel tank is refilled with the liquid fuel. .

According to a second aspect of the present invention, in the first aspect, the connection means is provided on the oil supply joint provided on the oil supply tank and the main body case and is detachably connected to the oil supply joint. A refueling joint receiver, wherein the refueling joint has a passage for guiding the liquid fuel in the refueling tank to the outside and a valve mechanism for opening and closing the passage, and the refueling joint receiver is connected to the refueling joint. A passage communicating with the passage and a passage communicating with the pump.

According to a third aspect of the present invention, in the second aspect, a valve mechanism for opening and closing the passage of the refueling joint receiver is provided.

In this case, it is possible to prevent the liquid fuel from leaking from the refueling joint receiver when falling.

According to a fourth aspect of the present invention, in the second or third aspect, the refueling joint receiver and the air intake means for introducing air into the refueling joint receiver are provided with the liquid fuel in the refueling tank. It is characterized in that it is provided above the liquid level.

In this case, when the operation is stopped, air is taken into the refueling joint receiver, so that the liquid fuel in the refueling joint receiver and the liquid fuel in the refueling joint are shut off, and the liquid fuel in the refueling joint is introduced into the refueling tank. Returning to a state in which the carburetor can be cleaned by baking, the operation of removing the liquid fuel at the time of baking cleaning of the carburetor becomes unnecessary. Further, since the refueling joint is located above the liquid level of the liquid fuel in the refueling tank, leakage of the liquid fuel from the refueling joint can be prevented.

According to a fifth aspect of the present invention, in the fourth aspect, the air intake means is provided in a path for returning unburned fuel inside the carburetor to the refueling joint receiver. Things.

In this case, the number of pipes is reduced, and the structure is simplified.

According to a sixth aspect of the present invention, in any one of the second to fifth aspects, the unburned fuel is stored in a path for returning the unburned fuel in the carburetor to the refueling joint receiver. And a fuel storage means configured to send unburned fuel toward the refueling joint receiver by the pressure from the carburetor.

In this case, the internal pressure is increased by heating the carburetor at the time of ignition, and the unburned fuel in the fuel storage means flows into the fuel supply joint receiver, so that the unburned fuel can be burned first.

According to a seventh aspect of the present invention, in the sixth aspect, the passage of the fuel supply joint also serves as a passage for returning unburned fuel into the fuel tank.

In this case, the structure is simplified, and unburned fuel flowing from the fuel storage means into the refueling joint receiver at the time of ignition is stored in the passage of the refueling joint so as to be burned before the liquid fuel in the refueling tank. be able to.

According to an eighth aspect of the present invention, in any one of the second to seventh aspects, a removable filter for removing dust contained in the liquid fuel is provided in the refueling joint receiver. Is what you do.

In this case, it is possible to prevent dust from being sent into the vaporizer. Further, maintenance is easy.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway front view of a liquid fuel combustion device (oil fan heater) according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the liquid fuel combustion device of FIG. 1, and FIGS. 3 is an enlarged view of each part of the liquid fuel combustion apparatus of FIG. 3, FIG. 3 is a partially cutaway front view of a fuel tank and a fuel joint, FIG. 4 is a longitudinal sectional view of a fuel joint body, and FIG. Explanatory drawing of the mounting structure, FIG. 6 is a longitudinal sectional view of a filler port and a cap of a filler tank, FIG. 7 is a longitudinal sectional view of a filler joint receiver, FIG.
Is an explanatory view of a connection structure between a refueling joint and a refueling joint receiver, FIG. 9 is a longitudinal sectional view of a valve mechanism for introducing air into the refueling joint receiver, FIG. 10 is a partially cutaway front view of a burner and a carburetor, and FIG. Longitudinal sectional view of the fuel storage means, FIG. 1
2 is a longitudinal sectional view of the cooler.

As shown in FIG. 1, the liquid fuel combustion apparatus of the present embodiment includes a rectangular parallelepiped main body case 1, which is integrally formed with a detachable front plate 2 and side walls. And the top plate 3 formed. An operation input unit 4 is provided on the upper part of the front plate 2, and operation information such as operation start and stop is input by the operation input unit 4. Also, front plate 2
An outlet 5 for blowing out warm air is provided at the lower part of the air conditioner.
On the right side of the top plate 3, a lid 6 for opening and closing an opening for taking the fuel tank 8 into and out of the main body case 1 is provided. The main body case 1 is mounted and fixed on a mounting table 7 which receives liquid fuel in the event of leakage.

As shown in FIGS. 1 and 2, the main body case 1 contains a liquid fuel and has a removable fuel tank 8.
A refueling joint 9 attached to the refueling tank 8, a refueling joint receiver 10 detachably connected to the refueling joint 9, and a refueling joint receiver 10
And a tank guide 11 for guiding the refueling tank 8 inserted into the main body case 1 to a predetermined location,
A vaporizer 12 that heats and vaporizes the liquid fuel, an electromagnetic pump 13 that sends the liquid fuel in the refueling tank 8 to the vaporizer 12,
Burner 1 for burning fuel gas generated by carburetor 12
4, a fuel storage means 15 for storing the unburned gas in the carburetor 12, a cooler 16 provided between the fuel storage means 15 and the carburetor 12 for cooling the unburned gas, and a fuel storage means 15. A valve mechanism (air intake means) 17 provided between the refueling joint receivers 10 is provided.

Reference numeral 18 denotes a combustion chamber surrounding the burner 14 for burning, and a burner box 19 provided at the bottom thereof.
The burner 14 is housed. Reference numeral 20 denotes a partition plate that partitions the inside of the main body case 1 so that heat generated during combustion does not reach the oil supply tank 8. Reference numerals 21 to 26 denote refueling joint receiver 10 and electromagnetic pump 13, electromagnetic pump 13 and carburetor 12, carburetor 12 and cooler 16, cooler 16 and fuel storage means 15, fuel storage means 15 and valve mechanism, respectively. 17, pipes for connecting and connecting the valve mechanism 17 and the refueling joint receiver 10, and these pipes 21 to 26 are formed of copper pipes.

The refueling tank 8 is a rectangular parallelepiped, and as shown in FIG. 3, a carrying handle 27 provided on the upper surface.
And a cylindrical oil supply port 28 (FIG. 6) provided at one end of the upper surface.
), A topped cylindrical cap 29 screwed into the fuel filler port 28, and an oil meter 8a provided at a position close to the cap 29 on the front side for visually checking the replenishment state of the liquid fuel. The liquid fuel is injected from the fuel supply port 28 by removing the cap 29.

The lubricating joint 9 is, as shown in FIG.
A refueling joint body 30 attached to the other end of the upper surface of the refueling tank 8 and protruding laterally; a suction pipe 31 connected to the base end of the refueling joint body 30 and hanging down inside the refueling tank 8; , A spindle type valve mechanism 3 installed on the tip side of the refueling joint body 30
And 2.

As shown in FIG. 4, the refueling joint main body 30 comprises a tubular base 33 bent at a right angle, and a bottomed cylindrical connecting portion 34 formed at the distal end thereof.
A passage 33 a through which the liquid fuel passes is formed inside the base 33, and a spout 36 protruding downward is formed at the lower end surface of the connecting portion 34. As described later, in addition to the liquid fuel sucked up from the fuel tank 8, unburned liquid fuel returning from the vaporizer 12 to the fuel tank 8 through the valve mechanism 17 also passes through the passage 33 a. However, a separate passage for the unburned liquid fuel may be provided.

The valve mechanism 32 is housed in the connecting portion 34 so as to be movable in the vertical direction, and has a valve spindle 37 formed with a lower end protruding from the spout 36, and the valve spindle 37. An O-ring packing 38 attached to the lower surface of the large diameter portion 37a, and a spring 39 for urging the valve body spindle 37 downward.

A lid nut 41 is screwed onto the upper end of the connection part 34 via an annular seal packing 40. The spring 39 is compressed by the lid nut 41 and an O-ring mounted on the valve body spindle 37. The packing 38 is pressed against a tapered surface 34 a formed below the inside of the connection portion 34, thereby closing the passage 34 b inside the connection portion 34. In addition, an O-ring packing 42 that seals between the spout 36 and the refueling joint receiver 10 is externally fitted.

As shown in FIG. 3, the lower end of the suction pipe 31 reaches near the bottom of the fuel tank 8, and a suction port 43 is attached to the lower end as shown in FIG. Is provided with a filter 44 that is impermeable to water and dust. Although the suction port 43 faces the bottom surface of the fuel tank 8, the suction port 43 may face the side surface of the fuel tank 8.

As shown in FIG. 5, a through hole 45 through which the suction pipe 31 passes and a screw hole 46 are formed on the upper surface of the fuel tank 8.
The refueling joint body 30 is provided with a screw (FIG. 2).
(See FIG. 47), and is fixed to the upper surface of the refueling tank 8 via a rubber packing 48.

As shown in FIG. 6, the cap 29 has a cylindrical shape with a top formed so as to be screwed into a screw formed on an outer peripheral portion of a cylindrical oil supply port 28 provided on the upper surface of the oil supply tank 8. , And a pressure valve mechanism 51 provided in the upper part of the cap body 50, and the oil supply port 28 is fixed via a rubber packing 52.

A pressure release hole 53 is provided at the center of the top wall of the cap body 50. Also, the cap body 50
The peripheral wall is formed with a screw, and the lower end of the peripheral wall is curled so as to be curved outward.

The packing 52 has a function of sealing the oil supply port 28 and the cap body 50, and is a disk-shaped member having a substantially U-shaped vertical cross section. have. The upper end of the peripheral edge of the packing 52 is in contact with the inner surface of the top wall of the cap body 50, and a space for accommodating the pressure valve mechanism 51 is formed between the packing 52 and the top wall of the cap body 50.

The pressure valve mechanism 51 includes a disc-shaped valve element 55,
And a spring 56 for urging this downward. A convex portion 57 having a smaller diameter than the pressure release hole 53 of the cap body 50 is formed at the center of the upper surface of the valve body 55. The valve body 55 is usually provided with a pressure release hole 54 of the packing 52.
When the pressure in the refueling tank 8 rises, it is pushed up against the resilience of the spring 56, and the pressure is released to the outside through the pressure release hole 54 of the packing 52 and the pressure release hole 53 of the cap body 50. I am running away.

As shown in FIG. 7, the lubricating joint receiver 1
Numeral 0 denotes a refueling joint receiving main body 58 fitted to the lower end of the connecting portion 34 of the refueling joint 9, and a valve mechanism 5 provided therein for receiving the valve spindle 37 of the refueling joint 9.
9.

The refueling joint receiving main body 58 is formed in a hollow cylindrical shape, and has an annular sealing surface 60 for receiving and supporting the O-ring 42 attached to the lower end of the connecting portion 34 of the refueling joint 9, and a valve body receiver 67 described later. , A connection opening 62 for connecting to the electromagnetic pump 13, and a projection for projecting downward from the side surface. And a connection port 63 for connection to the valve mechanism 17. Screws for screwing nuts for fixing the fuel feed pipes 21 and 26 are formed in the outer peripheral surfaces of the distal ends of the connection ports 62 and 63, respectively.

The valve mechanism 59 includes a refueling joint receiving main body 5.
A valve body 64 movably accommodated in the up and down direction, a spring 65 for urging the valve body 64 upward, and a valve body 6
4 includes an O-ring packing 66 attached to the upper surface of a large-diameter portion 64 a formed at the lower end of the valve body 4, and a valve body receiver 67 mounted in the valve body receiver housing 61. The O-ring packing 66 is pressed against a tapered surface 58a formed inside the refueling joint receiving main body 58, whereby the passage 58b inside the refueling joint receiving main body 58 is closed.

The upper end of the valve body 64 is formed on a flat surface so as to receive the valve body spindle 37 of the valve mechanism 32 of the oil supply joint 9, and this area is larger than the contact surface with the valve body spindle 37. Is also getting bigger. At the upper end of the valve body 64, a cylindrical side wall 64b extending downward from the peripheral edge of the upper surface is formed.
Is provided with a cutout hole (not shown) through which the liquid fuel passes.

The valve body receiver 67 has a valve body receiving portion 67a for receiving the lower end portion of the side wall 64b of the valve body 64, and a lattice hole 67b formed therearound and through which the liquid fuel passes.
The downward movement of the valve body 64 is regulated by the side wall 64b abutting on the valve body receiving portion 67a.
A gap through which a proper amount of liquid fuel can flow is formed between the lower end portion 4 and the inside of the refueling joint receiving main body 58.

In order to remove dust contained in the liquid fuel sent from the fuel tank 8 or the fuel storage means 15 so as to surround the upper end of the valve body 64, the upper part of the inside of the fuel joint receiving body 58 is provided. A filter 68 having a U-shaped vertical section is detachably provided.

As shown in FIG. 8, the lubricating joint receiver 1
0, the lower end of the connecting portion 34 of the refueling joint 9 is inserted into the refueling joint receiving main body 58 and the connecting portion 34 when the refueling tank 8 is mounted in the main body case 1.
The O-ring packing 42 attached to the lower end portion of the tank guide is pressed against the sealing surface 60 of the refueling joint receiving body 58, whereby the connection portion 34 and the refueling joint receiving body 58 are sealed and sealed. 1
1 (see FIG. 1).

The lubricating joint 9 is the lubricating joint receiver 1
0, the valve body spindle 37 of the refueling joint 9 pushes down the valve body 64 of the refueling joint receiver 10 against the resilience of the spring 65, and the O-ring packing 66 separates from the tapered surface 58a and refills the oiling joint. The passage 58b inside the receiving main body 58 is opened. When the lower end of the side wall 64b of the valve body 64 contacts the valve body receiver 67, the valve body 64
Is stopped, the valve spindle 37 of the refueling joint 9 is pushed upward against the elastic force of the spring 39, and the O-ring packing 38 is separated from the tapered surface 34a to open the passage 34b. Then, the liquid fuel in the connection portion 34 passes through the spout 36 and the refueling joint receiver 1
It flows to zero.

When the operation is stopped, the valve mechanism 17
This is for allowing air to flow into the refueling joint receiver 10 in order to stop the supply of the liquid fuel to the fuel tank 3. As shown in FIG. A movable piece 71 accommodated in a vertical direction in a passage 17a formed by a valve body 69 and a suction piece 70, and a lower end of the movable piece 71 O-ring packing 72 attached to a tapered surface 71a formed in the portion, a spring 73 for urging the movable piece 71 upward, and an electromagnetic wave arranged to surround the outer peripheral portions of the valve body 69 and the suction piece 70. And a coil 74.

A connection port 75 protruding upward is provided at the center of the upper end face of the valve body 69, and this connection port 75 is connected to the fuel storage means 15 via the fuel feed pipe 25. Further, an air intake hole 7 is provided at an upper portion of the valve body 69.
6 is provided, and a passage 17a is formed through the air intake hole 76.
Take in air inside.

A connection port 77 projecting downward is provided at the center of the lower end surface of the suction piece 70, and this connection port 77 is connected to the fuel supply joint receiver 10 via the fuel feed pipe 26. The movable piece 71 has a plurality of grooves 71b so that unburned fuel and air can pass between the movable piece 71, the valve body 69, and the adsorption piece 70.

When the electromagnetic coil 74 is energized, the movable piece 71
Is attracted to the suction piece 70 against the resilience of the spring 73, and the O-ring packing 72 abuts against the tapered surface 70a formed inside the suction piece 70 to close the passage 17a. When the power supply to the electromagnetic coil 74 is stopped, the movable piece 71 is pushed upward by the spring 73, the O-ring packing 72 is separated from the tapered surface 70a, and the passage 17a is opened.

The valve mechanism 17 is closed during operation and opened during stoppage, sucks air from the air intake hole 76, sends air to the refueling joint receiver 10, and connects the liquid fuel in the refueling joint receiver 10 with the refueling joint. The liquid fuel 9 is shut off to prevent the liquid fuel from flowing from the refueling tank 8 to the electromagnetic pump 13. Further, the valve mechanism 17 includes the vaporizer 1
The air which is released at the time of the baking cleaning of No. 2 and is taken in is sent to the vaporizer 12 via the electromagnetic pump 13.

As shown in FIG. 10, the vaporizer 12 comprises a vaporizing element 78 for heating and vaporizing the liquid fuel, and a vaporizing element 78.
A nozzle 79 for ejecting the fuel gas generated in the above, a needle 80 moving in the axial direction of the nozzle 79 to open and close the nozzle 79, and a solenoid valve 8 for moving the needle 80
1, a fuel inlet 82 for guiding liquid fuel to the vaporizing element 78,
It comprises a fuel return port 83 for sending out liquid fuel inside the vaporizer 12 when the operation is stopped, and a heat recovery section 84 for recovering the heat of combustion of the burner 14.

The vaporizing element 78 is obtained by sintering fine ceramic particles into a cylindrical shape. Tar generated when the liquid fuel is vaporized is deposited from the surface of the vaporizing element 78 toward the inside.

The fuel inlet 82 has a double pipe structure.
It consists of an outer stainless steel pipe 85 and an inner copper pipe 86. The stainless pipe 85 is used to prevent the temperature of the liquid fuel sent to the vaporizer 12 from rising.
2 to suppress heat conduction. Further, the copper pipe 86 has a tip located outside the vaporizer 12 in order to suppress heat conduction.

The solenoid valve 81 includes a movable piece 87 connected to the rear end of the needle 80, a hollow cylindrical suction piece 88 disposed coaxially with the needle 80 in front of the movable piece 87, and a suction piece. An annular electromagnetic coil 89 coaxially provided at a rear end of the movable piece 87 and a spring 9 provided between the movable piece 87 and the attraction piece 88 to urge the movable piece 87 rearward.
When the electromagnetic coil 89 is energized, the movable piece 87 moves forward against the resilience of the spring 90, and the needle 80 blocks the passage inside the nozzle 79. When the energization is stopped, the movable piece 87 moves rearward due to the elastic force of the spring 90, and the nozzle 79
Open the passage inside.

The burner 14 comprises a mixing pipe 91 for mixing the fuel gas vaporized by the vaporizer 12 with the primary combustion air, and a flame port 92 for burning the fuel gas mixed with the primary combustion air.

The electromagnetic pump 13 is disposed with the liquid fuel suction side facing upward and the liquid fuel discharging side facing downward. Since liquid fuel is supplied to the electromagnetic pump 13 from above, the length of the fuel feed pipe 21 from the refueling joint receiver 10 to the electromagnetic pump 13 can be shortened by disposing the electromagnetic pump 13 in this manner. .

The fuel storage means 15 temporarily stores the fuel gas returned from the carburetor 12, and as shown in FIG. 11, a closed cylindrical container 93 and a side wall of the container 93 from the side. A fuel inlet 94 projecting toward the
A fuel outlet 95 provided on the upper surface of the fuel cell so as to protrude upward.
, Disposed coaxially in the container 93, one end of which is provided with the fuel outlet 9.
5 and a pipe 96 whose other end is located near the bottom surface of the container 93.

When the nozzle 79 of the vaporizer 12 is closed by stopping the electromagnetic pump 13 for controlling the room temperature during the period from the start of operation to the stop, unburned gas remaining in the vaporizer 12 returns to the fuel tank 8. Then, the unburned gas is liquefied to become liquid fuel, and the amount of this liquid fuel is about 0.3 to 0.5 cc by stopping the electromagnetic pump 13 once. Stopping of the electromagnetic pump 13 for room temperature control in one day operation
When rotated, about 3 to 5 cc of unburned liquid fuel is generated, and the container 93 is formed so as to store up to 20 cc of liquid fuel.

The other end of the pipe 96 is a trumpet-shaped inlet 96a. The reason why the inlet 96a is formed in such a shape is that the fuel is difficult to enter the pipe 96 due to surface tension because the pipe 96 is a thin tube, and the fuel easily enters the pipe 96 by cutting off such surface tension. To do that.

As shown in FIG. 12, the cooler 16 comprises a pipe 98 through which fuel passes, and fins 99 provided on the outer peripheral surface thereof, and the unburned fuel returning from the vaporizer 12 to the fuel storage means 15. Release the gas.

Although not shown, the liquid fuel combustion apparatus according to the present embodiment has a blower fan for taking indoor air into the main body case 1, a fan motor for driving the blower fan, It has a room temperature thermistor for detecting the temperature, a frame sensor for detecting the flame current value of the combustion flame of the burner 14, a control device including a microcomputer, and the like.

Next, the operation of the liquid fuel combustion apparatus having the above-described configuration will be described. When the liquid fuel in the fuel tank 8 mounted in the main case 1 runs out, the lid 6 of the main case 1 is opened, the handle 27 is held by hand, the fuel tank 8 is removed from the main case 1, and the handle 27 is provided. The cap 29 is removed with the surface facing up, and the liquid fuel is supplied into the fuel tank 8 from the fuel port 28.

When the refueling of the liquid fuel is completed and the fuel tank 8 is inserted into the main body case 1, the lower end of the connecting portion 34 of the fueling joint 9 attached to the fuel tank 8 is connected to the fuel tank attached to the main body case 1. While being inserted into the joint receiver 10, the valve spindle 37 of the refueling joint 9 pushes down the valve body 64 of the refueling joint receiver 10,
When the side wall 64b of the valve body 64 contacts the valve body receiver 67, the downward movement of the valve body 64 stops, and the valve body spindle 37 of the refueling joint 9 is pushed up.

As a result, the O attached to the valve body 64
The ring packing 66 moves away from the tapered surface 58a of the oil supply joint receiving main body 58, and the valve body spindle 37
Is separated from the tapered surface 34a of the connection portion 34, and the passage of the liquid fuel from the fuel tank 8 to the electromagnetic pump 13 is opened. The O-ring packing 42 attached to the lower end of the connection portion 34 of the refueling joint 9 is
Is press-contacted to the seal surface 60 at the upper end of the oil supply joint 9, whereby the oil supply joint 9 is sealed with respect to the oil supply joint receiver 10.

When the operation start switch (not shown) of the operation input section 4 is operated, the vaporizer 12 is heated by the vaporizer heater attached to the vaporizer 12. At this time, the temperature of the vaporizer 12 is detected by the vaporizer thermistor. When the vaporizer 12 is heated to a predetermined temperature, the electromagnetic pump 13 is driven, and the liquid fuel in the refueling tank 8 is sucked up by the pipe 31. The electromagnetic pump 13 is sucked up and passes through the refueling joint 9 and the refueling joint receiver 10.
To the vaporizer 12.

The liquid fuel heated by the vaporizer 12 is gasified, and is jetted from the flame port 92 of the burner 14, ignited at the flame port 92 and burned in the combustion chamber 18. At this time,
Room temperature detected by room temperature thermistor and operation input unit 4
The controller controls the electromagnetic pump 13 to adjust the amount of liquid fuel sent to the carburetor 12 on the basis of the difference from the set temperature set in the above, thereby adjusting the amount of heat generated by combustion.

When combustion starts 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 take indoor air into the main body case 1. The rotation speed of the blower fan is controlled by the control device. The room air taken into the main body case 1 captures the radiant heat in the combustion chamber 18 and blows out the hot air together with the combustion gas from the outlet 5 into the room to warm the room.

When the operation is stopped or the combustion is stopped for adjusting the room temperature, the electromagnetic pump 13 is stopped, and the power supply to the vaporizer heater is stopped. At this time, the solenoid valve 81 is energized, the movable piece 87 moves forward, the needle 80 closes the nozzle 79, and the unburned gas remaining in the carburetor 12 flows from the fuel return port 83 to the fuel feed pipe 2.
The fuel is stored in the fuel storage means 15 through 3 and 24. At this time, the unburned gas radiates heat in the cooler 16 provided between the fuel feed pipes 23 and 24, and the temperature decreases. The temperature of the unburned gas in the fuel storage means 15 decreases over time and changes to a liquid.

At the time of ignition, the needle 80 closes the nozzle 79 until the vaporizer 12 reaches a predetermined temperature, the liquid fuel in the vaporizer 12 is heated to a gas, and the pressure in the vaporizer 12 becomes about 0.2 kg / kg. cm, and the pressure acts on the liquid surface of the liquid fuel stored in the fuel storage means 15 through the fuel feed pipes 23 and 24 to push down the liquid surface, and the fuel flows from the trumpet-like intake 96a into the pipe 96. Flows into
The fuel flows into the refueling joint receiver 10 from the connection port 63 via the fuel feed pipes 25 and 26.

The fuel is temporarily stored in the connection ports 62 and 63 of the refueling joint receiver 10 and in the passage 33 a of the refueling joint body 30, and a part of the fuel is sent to the refueling tank 8. At the start of operation, unburned fuel returned from the carburetor 12 always exists in the connection ports 62 and 63 and the passage 33a, and the unburned fuel is used first, so that no defective fuel is generated. .

When the liquid fuel is heated and vaporized inside the vaporizer 12, impurities are generated. If the liquid fuel is operated for a long time, the impurities accumulate inside the vaporizer 12 and are ejected from the nozzle 79 of the vaporizer 12. Since the amount of fuel gas decreases, it is necessary to remove impurities deposited inside the vaporizer 12 in order to return to the original gas amount, and the baking cleaning of the vaporizer 12 is performed in the following procedure.

That is, when the baking cleaning switch (not shown) of the operation input unit 4 is operated in a state where the fuel tank 8 is attached to the main body case 1, the temperature of the vaporizer 12 rises to a temperature necessary for baking cleaning. Then, the valve mechanism 17 is opened, and the electromagnetic pump 13 is driven. Thereby, the valve mechanism 1
The air taken in from 7 flows into refueling joint receiver 10, so that the liquid fuel in refueling joint 9 and the liquid fuel in refueling joint receiver 10 are shut off, and the liquid fuel in refueling joint 9 returns to refueling tank 8.

When the liquid fuel in the fuel feed path from the refueling joint receiver 10 to the carburetor 12 burns, the valve mechanism 1
The air sucked from the air intake hole 76 of 7 is sent to the vaporizer 12 by the electromagnetic pump 13, and the air causes the impurities in the vaporizer 12 to be burned off and removed. As described above, according to the present invention, the operation of extracting the liquid fuel at the time of the idle baking cleaning is unnecessary, so that the idle baking cleaning of the vaporizer 12 is easy.

When refilling the fuel tank 8 with liquid fuel, the fuel tank 8 is taken out of the main body case 1 and the fuel tank 8 is placed on a flat surface with the handle 27 facing upward. The cap 29 is removed, and liquid fuel is supplied from the filler port 28 using a fuel pump or the like. As described above, when the refueling tank 8 is replenished with the liquid fuel or when the refueling is completed and the refueling tank 8 is mounted on the main body case 1, there is no need to turn the refueling tank 8 upside down. Further, the liquid fuel in the fuel tank 8 is sucked out through the fuel joint 9, so that the outer surface of the cap 29 is not stained with the liquid fuel as in the related art, and the liquid fuel does not adhere to the hand.

Further, the liquid fuel to be supplied to the refueling tank 8 is often stored outside the room at a low temperature. Since the temperature is low, the liquid fuel is supplied to the refueling tank 8 and then used at a high temperature room. At this time, the air in the portion of the fuel tank 8 that is not filled with the liquid fuel expands and the pressure rises. This pressure pushes up the valve body 55 provided in the cap 29, and the pressure is released from the packing 52. Hole 5
Since the liquid fuel escapes to the outside through the pressure release hole 53 of the cap 4 and the cap body 50, the liquid fuel does not overflow from the fuel tank 8.

[0081]

As described above, in the liquid fuel combustion apparatus according to the present invention, since the fuel tank is mounted on the main body case with the fuel supply port facing upward, the fuel tank is removed from the main body case to remove the liquid fuel. There is no need to turn the fuel tank upside down when refilling and when refueling is completed and the refueling tank is mounted on the main body case.
Further, since the fuel tank and the pump are connected to each other through the connection means, the outer surface of the cap is not contaminated with the liquid fuel, and the liquid fuel does not adhere to the hand when the fuel tank is refilled with the liquid fuel. . Furthermore, since the fuel supply port and the cap are located above the fuel tank when the fuel tank is mounted on the main body case, there is no possibility of leakage of the liquid fuel due to loosening of the cap.

The liquid fuel combustion apparatus according to the third invention is
By providing the valve mechanism for opening and closing the passage of the refueling joint receiver, it is possible to prevent the liquid fuel from leaking from the refueling joint receiver at the time of falling.

The liquid fuel combustion device according to the fourth invention is
By providing the refueling joint receiver and the air intake means for taking in air into the refueling joint receiver above the liquid level of the liquid fuel in the refueling tank, air is taken into the refueling joint receiver when operation is stopped. Since the liquid fuel in the refueling joint receiver and the liquid fuel in the refueling joint are shut off, the liquid fuel in the refueling joint returns to the refueling tank, and a state in which the carburetor can be cleaned by baking is used. The work of removing the liquid fuel at the time of empty baking cleaning of the vessel becomes unnecessary. Also,
Since the refueling joint is located above the liquid level of the liquid fuel in the refueling tank, it is possible to prevent the liquid fuel from leaking from the refueling joint.

The liquid fuel combustion apparatus according to the fifth invention is
Since the air intake means is provided in the path for returning the unburned fuel inside the carburetor to the refueling joint receiver, there is an advantage that the number of pipes is reduced and the structure is simplified.

The liquid fuel combustion apparatus according to the sixth aspect of the present invention
Fuel that is configured to store the unburned fuel in the middle of the path for returning the unburned fuel inside the carburetor to the refueling joint receiver and to send out the unburned fuel toward the refueling joint receiver by the pressure from the carburetor. By providing the storage means, the pressure in the carburetor increases at the time of ignition, and this causes the unburned fuel in the fuel storage means to flow into the refueling joint receiver. Burning can be prevented.

The liquid fuel combustion apparatus according to the seventh aspect of the present invention
By making the passage of the refueling joint also serve as a passage for returning unburned fuel into the refueling tank, the structure is simplified, and unburned fuel flowing into the refueling joint receiver from the fuel storage means at the time of ignition is supplied to the refueling joint. The fuel can be stored in the passage so as to be burned before the liquid fuel in the fuel tank, and defective combustion can be more reliably prevented.

The liquid fuel combustion apparatus according to the eighth aspect of the present invention
By providing a removable filter for removing dust contained in the liquid fuel in the refueling joint receiver, dust can be prevented from being fed into the vaporizer. Further, maintenance is easy.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a liquid fuel combustion device (oil petroleum heater) according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of the liquid fuel combustion device of FIG.

FIG. 3 is a partially cutaway front view of a refueling tank and a refueling joint.

FIG. 4 is a longitudinal sectional view of a refueling joint main body.

FIG. 5 is an explanatory diagram of a mounting structure of a fueling joint to a fueling tank.

FIG. 6 is a vertical cross-sectional view of a filler port and a cap of a filler tank.

FIG. 7 is a longitudinal sectional view of a refueling joint receiver.

FIG. 8 is an explanatory diagram of a connection structure between a refueling joint and a refueling joint receiver.

FIG. 9 is a longitudinal sectional view of a valve mechanism for taking air into a refueling joint receiver.

FIG. 10 is a partially cutaway front view of a burner and a vaporizer.

FIG. 11 is a longitudinal sectional view of the fuel storage means.

FIG. 12 is a longitudinal sectional view of a cooler.

FIG. 13 is a partially omitted front sectional view of an example of a conventional liquid fuel combustion device.

FIG. 14 is a side sectional view of FIG. 13;

FIG. 15 is an enlarged sectional view of a cap of a refueling tank and a holder thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 8 Refueling tank 9 Refueling joint 10 Refueling joint receiver 12 Vaporizer 13 Electromagnetic pump 14 Burner 15 Fuel storage means 17 Valve mechanism (Air intake means) 28 Refueling port 29 Cap 32 Refueling joint valve mechanism 59 Refueling joint receiver Valve mechanism 68 Filter

Continued on the front page F term (reference) 3K068 AA15 AB20 AB21 BB01 BB03 BB14 BB25 CA05 CA06 CA07 CA16 CA25 CA29 CB03 CB13 CC01 CC07 DA01 DA08 EA03

Claims (8)

[Claims] 1. A removable fuel tank, a vaporizer for heating and vaporizing liquid fuel in a main body case, a pump for sending liquid fuel from the fuel tank to the vaporizer, and a pump formed by the vaporizer. And a burner for burning the fuel gas, wherein the refueling tank comprises:
A fuel supply port provided at a location that is an upper portion when mounted on the main body case, and a cap for closing the fuel supply port, wherein the refueling tank and the pump are provided when the refueling tank is mounted on the main body case. A liquid fuel combustion device, comprising: connecting means for communicating and connecting the liquid fuel combustion device with the liquid fuel combustion device. 2. The fuel supply system according to claim 2, wherein the connection means is provided on a fueling joint provided on the fueling tank, and on a body case.
A refueling joint receiver detachably connected to the refueling joint, the refueling joint having a passage for guiding the liquid fuel in the refueling tank to the outside, and a valve mechanism for opening and closing the passage; The liquid fuel combustion device according to claim 1, wherein the receiver has a passage communicating with the passage when connected to the refueling joint and communicating with the pump. 3. The liquid fuel combustion apparatus according to claim 2, further comprising a valve mechanism for opening and closing the passage of the refueling joint receiver. 4. The refueling joint receiver and an air intake means for introducing air into the refueling joint receiver are provided above a liquid level of the liquid fuel in the refueling tank. 4. The liquid fuel combustion device according to 2 or 3. 5. The liquid fuel combustion apparatus according to claim 4, wherein the air intake means is provided in a path for returning unburned fuel in the carburetor to the refueling joint receiver. 6. An unburned fuel is stored in the middle of a path for returning unburned fuel inside the carburetor to the refueling joint receiver, and unburned fuel is supplied to the refueling joint receiver by pressure from the carburetor. The liquid fuel combustion device according to any one of claims 2 to 5, further comprising a fuel storage unit configured to send the fuel to the liquid storage device. 7. The liquid fuel combustion device according to claim 6, wherein a passage of the refueling joint doubles as a passage for returning unburned fuel into the refueling tank. 8. The liquid fuel combustion apparatus according to claim 2, wherein a detachable filter for removing dust contained in the liquid fuel is provided in the refueling joint receiver. .