JPH11159748A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate regulation of supplying amount of heat or igniting operation, which are controlled by a control unit, and eliminate a problem that noise is generated in the control unit, by a method wherein an ignition circuit is arranged in a casing for receiving a combustion chamber while a heat insulating layer is provided between the ignition circuit and the combustion chamber. SOLUTION: A combustion device is provided with a casing body 29 receiving a combustion chamber 1 generating combustion heat, a fuel tank unit 3 storing fuel for supplying into the combustion chamber 1, and a control unit 4 controlling the combustion heat in the combustion chamber 1. Further, the device is provided with a remote controller 5, transmitting an indication for controlling combustion in a heat source unit 1 or a temperature setting, for example, or the like, and an ignition circuit 6 for effecting discharging ignition by the output of the control unit 4. The ignition circuit 6 is arranged in the casing body 2, however, a heat insulating layer 7 is provided between the ignition circuit 6 and the combustion chamber 1. In this case, the fuel tank unit 3 is provided detachably with a fuel cartridge 8 for storing fuel such as propane or the like, while the fuel is injected from the fuel cartridge 8 through a fuel nozzle 15, and combustion air introduced through an air suction port 10 is mixed into the fuel to burn the mixture in a combustion unit 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus equipped with fuel and utilizing heat generated by combustion.

[0002]

2. Description of the Related Art Cairo using petroleum-based fuel as an energy source is widely used for heating using combustion heat. Some disposable warmers utilize a chemical reaction between a metal such as iron and an oxidizing material.

[0003]

However, the conventional Cairo only heats a local area. When performing ignition,
Cairo had to be taken out once, which was inconvenient. In addition, disposable warmers cannot be reused, and it is difficult to control the amount of heat during heating, and the warmers cannot be heated at a desired temperature.

[0004] The present invention provides heating over a wide area,
It is an object of the present invention to provide a highly reliable combustion device that enables adjustment of the amount of heat supplied, realizes an easy ignition operation, and is free from malfunction at the time of ignition noise and temperature rise of an ignition circuit.

[0005]

SUMMARY OF THE INVENTION The present invention provides a combustion chamber for generating heat of combustion, a fuel tank for storing fuel to be supplied to the combustion chamber, a control unit for controlling the heat of combustion in the combustion chamber, and a control unit. The ignition circuit is equipped with an ignition circuit that performs discharge ignition by the output of, and it is possible to easily adjust the amount of heat supplied and perform the ignition operation, and because the ignition circuit is close to the combustion chamber through the heat insulation layer, There is no malfunction due to the noise and the temperature rise of the ignition circuit, and a wide range of heating is possible by the efficient circulation of the air in the housing accommodating the combustion chamber.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a combustion chamber for generating combustion heat, a fuel tank for storing fuel to be supplied to the combustion chamber, and a combustion heat for the combustion chamber. A control unit for controlling, and an ignition circuit for performing discharge ignition by an output of the control unit, the ignition circuit is disposed in a housing that houses the combustion chamber, and a heat insulating layer is provided between the ignition circuit and the combustion chamber. It is easy to adjust the amount of heat supplied and the ignition operation by the output from the control unit, and because the combustion chamber and the ignition circuit are close to each other, there is no concern that noise will be put on the control unit. It is less affected by the heat of the combustion chamber.

According to a second aspect of the present invention, in addition to the first aspect, at least one upper opening and a lower opening are provided near the ignition circuit of the housing. The ignition circuit can be cooled by the circulation of air.

According to a third aspect of the present invention, in addition to the first or second aspect, the ignition circuit is formed by a double-sided through-hole plated substrate.
Solder cracks due to the heat cycle of the circuit board can be prevented.

According to a fourth aspect of the present invention, there is provided a combustion chamber for generating heat of combustion, a housing for accommodating the combustion chamber, a fuel tank for storing fuel to be supplied to the combustion chamber, A control unit for controlling combustion heat of the chamber, wherein the housing is provided with at least one upper convection port and at least one lower convection port for obtaining convection by combustion heat, and the total area of the lower convection ports The overall area of the upper convection port is increased, and the air that has flowed in from the lower convection port of the housing and expanded by the combustion heat can be efficiently discharged from the upper convection port.

According to a fifth aspect of the present invention, in addition to the fourth aspect, a heat dissipating fin is provided in the combustion chamber so that air flows from the lower convection port to the upper convection port. Therefore, efficient heat radiation can be obtained by flowing air along the radiation fins.

[0011]

FIG. 1 is a sectional view of a combustion apparatus according to an embodiment of the present invention as viewed from a plane.

FIG. 2 is a cross-sectional view of the combustion apparatus as viewed from a lower surface direction. FIG. 3 is a perspective view of the combustion chamber 1.

The combustion device includes a combustion chamber 1 for generating combustion heat.
A housing 2 for accommodating the combustion chamber 1; a fuel tank unit 3 for storing fuel to be supplied to the combustion chamber 1; a control unit 4 for controlling the heat of combustion in the combustion chamber 1; A remote controller 5 for transmitting an instruction for controlling, for example, a temperature setting, to the control unit 4, and an ignition circuit 6 for performing discharge ignition by an output of the control unit 4, and the ignition circuit 6 is disposed in the housing 2. The heat insulation layer 7 is provided between the ignition circuit 6 and the combustion chamber 1.

In this embodiment, a housing 2 for housing a combustion chamber 1
Are separated from the fuel tank unit 3, the control unit 4, and the remote controller 5, respectively. In this embodiment, the air layer formed of the housing 2 is used for the heat insulating layer 7, but a heat insulating material made of, for example, ceramic fiber may be used.

A fuel cartridge 8 for storing butane, propane, or a mixture thereof is detachably provided in the fuel tank 3. The fuel cartridge 8 and the combustion chamber 1 are connected to each other by a flexible fuel passage. 9 has been contacted.

The combustion chamber 1 has an intake port 10 and an exhaust port 11
Through an intake path 12 and an exhaust path 13 to an intake / exhaust top 14. The fuel sent from the fuel cartridge 8 via the fuel passage 9 is ejected from the fuel nozzle 15. The ejected fuel sucks the combustion air introduced from the intake port 10, turns into an air-fuel mixture, and burns in the combustion section 16. An ignition electrode 18 protruding into the combustion section 16 and connected to the ignition circuit 6 via an ignition wire 17 ignites the air-fuel mixture in the combustion section 16.

The exhaust gas after combustion in the combustion section 16 is:
The air is exhausted from the intake / exhaust top 14 through the exhaust path 13 through the exhaust port 11. The combustion heat generated in the combustion section 16 is applied to the outer wall 1
The outer wall 19 is attached so as to thermally conduct the heat to the heat radiating portion 20, and the conduction heat is radiated from the heat radiating portion 20.

The air warmed by the outer wall 19 is
It rises inside the housing 2 by convection. The housing 2 is provided with an upper convection port 21 in the upper part of the combustion chamber 1 and a lower convection port 22 in the lower part of the combustion chamber 1. The upper convection port 2 is larger than the total area of the lower convection port 22 so that the air flowing in from the lower convection port 22 and expanded by the combustion heat is efficiently discharged from the upper convection port 21.
The overall area of 1 is increased.

Further, in order to increase the efficiency of heat radiation from the combustion chamber 1, a radiation fin 23 is provided in the combustion chamber 1 and a lower convection port 22 is provided.
The air 24 is provided so as to flow toward the upper convection port 21.

An upper opening 25 and a lower opening 26 for lowering the temperature of the ignition circuit 6, which tends to rise due to the combustion heat of the combustion chamber 1, by the flow of air are provided in the upper and lower portions of the ignition circuit 6 of the housing 2. Is provided. Reference numeral 27 denotes a start switch for starting the combustion device of this embodiment. When the start switch 27 is operated, the fuel cartridge 8
The on / off valve 28 provided between the fuel cell 9 and the fuel passage 9 is opened, and the power supply of the control unit 4 is started.

Next, FIG. 4 shows a schematic configuration of the ignition circuit 6. That is, the ignition circuit 6 includes a filter unit 29 for reducing noise at the time of ignition, an oscillating unit 30 for periodically generating an ignition spark, and a boosting unit for securing a voltage necessary for generating the ignition spark. 31. The ignition spark occurs at the ignition electrode 18 connected to the booster 31 via the ignition wire 17.

FIG. 5 shows a cross section of a circuit board constituting the ignition circuit 6. In this embodiment, a double-sided through-hole plated substrate 32 is used as a circuit board. FIG. 5A shows a cross-sectional structure thereof, and FIG. 5B shows a cross-sectional structure of a generally used circuit board. In FIG. 5A, a circuit pattern 34 using copper is printed on both surfaces of the base material 33. The circuit pattern 3 is provided on the electronic component mounting portion of the circuit pattern.
A mounting hole 35 penetrating through the mounting hole 4 and the base material 33 is provided, and copper plating is applied from both opening portions of the mounting hole 35 to the inner wall to form a plated through hole 36.
Now, the electrode 38 of the electronic component 37 is plated with the through hole 3.
6 and soldering, the solder 39 flows along the plated through hole 36 and the plated through hole 36
The space between the electrode and the electrode 38 is filled with the solder 39. In addition,
In this embodiment, a glass epoxy base material having a small expansion and contraction due to a heat cycle is used as the base material 33.

On the other hand, in FIG. 5B, a circuit pattern 41 using copper is printed on one side of the base material. The circuit pattern 4 is provided on the electronic component mounting portion of the circuit pattern 41.
1 and a mounting hole 42 penetrating through the base material 40 are provided. Now, when the electrode 44 of the electronic component 43 is inserted into the mounting hole 42 and soldering is performed from the surface of the circuit pattern 41, the solder solidifies so as to connect the tip of the electrode 44 and the circuit pattern 41, and Does not flow. Generally, a paper phenol base material is used as the base material 40. When such a general circuit board is used in a place where a heat cycle is severe as in the present embodiment, solder cracks 46 are likely to be generated due to expansion and contraction of the base material 40, but when a double-sided through-hole plating board is used, Even if the base material 33 repeatedly expands and contracts, solder cracking does not occur because the solder is firmly filled in the plated through holes. The double-sided through-hole plated substrate is generally used for high-density mounting of electronic components because the circuit pattern is printed on both sides, but in this embodiment, it is used for measures against solder cracking due to heat cycles. Used.

The start switch 27 is operated to open and close the on-off valve 28.
Is opened and fuel is supplied from the fuel cartridge 8, the fuel is supplied to the combustion chamber 1 through the fuel passage 9. The fuel is butane, propane, or a mixture thereof, and is stored in the fuel cartridge 8 in a liquid state. The smaller the fuel cartridge 8 is, the better it is for carrying, but the longer the burning time is, the better. Therefore, in the case of butane, the capacity is set to about 14 g. The fuel supplied to the combustion chamber 1 is in a gaseous state, and the fuel ejected from the fuel nozzle 15 sucks combustion air,
It becomes a mixture. The activation switch activates the power supply of the control unit 4 at the same time as the operation, and the ignition circuit 6 operates by the output of the control unit, and the ignition spark is periodically generated at the ignition electrode 1.

Thus, the air-fuel mixture in the combustion chamber 16 is ignited to generate combustion heat. Most of the generated heat exchanges heat with the outer wall 19 of the combustion chamber 1, and the temperature of the heat-exchanged combustion gas decreases, and the combustion gas is discharged from the exhaust port 11. By the way, during the operation of the ignition circuit, noise is likely to be generated due to the influence of the oscillating unit 30, and when the control unit 4 receives noise, there is a high possibility of malfunction. In particular, there is a high probability that noise is generated from the ignition wire 17 connecting the ignition circuit 6 and the ignition electrode 18.

Therefore, in the present embodiment, since the ignition circuit 6 is housed in the housing 2 and provided near the combustion chamber 1, the length of the ignition wire 17 is kept to a minimum, thereby generating noise. The probability has been significantly reduced. In addition, the ignition circuit 6
Since the heat insulating layer 7 is provided between the ignition circuit 6 and the combustion chamber 1, it is possible to prevent the ignition circuit 6 from abnormally rising in temperature due to combustion heat and causing a malfunction. Further, since the air flowing from the lower opening 26 provided at the lower part of the ignition circuit passes through the ignition circuit 6 and flows to the upper opening 25, the ignition circuit is cooled and does not exceed the heat resistant temperature.

Further, since the ignition circuit 6 uses the double-sided through-hole plated substrate 32, solder cracking due to a heat cycle does not occur.

The heat exchanged on the outer wall 19 of the combustion section 16 is
A part is conducted to the heat radiating part 20. The heat radiating section 20 is made of a material having good heat conductivity such as high heat conductive fiber or metal fiber and having high flexibility. Also, part of the heat is
The outer wall 19 warms the air, and this air flows upward in the housing 2 by natural convection.

Therefore, the air that has flowed into the casing 2 from the lower convection port 22 is discharged from the upper convection port 21. This air is warmed and expanded in the housing 2,
Since the total area of the upper convection port 21 is larger than the total area of the upper convection port 21, the air is efficiently discharged from the upper convection port 21.

Further, since the radiation fins 23 are provided in the combustion chamber 1 in a direction in which the air 24 flows from the lower convection port 22 toward the upper convection port 21, a large heat radiation amount can be obtained. As the number of the radiation fins 23 increases, the amount of heat radiation also increases. However, if the number of the heat radiation fins 23 is too large, the convection passage may be narrowed, and the amount of heat radiation may be reduced. It is known that, when the convection passage is narrowed due to downsizing of the housing 2 or the like, providing an opening on the side surface of the housing 2 can also provide efficient convection.

The released warm air rises while warming the human body surface over a wide area. The combustion apparatus of the present embodiment, when mounted on the human body such that the housing 2 is located at the center of the waist, the fuel tank unit 3 and the control unit 4 are located at the abdomen, and the remote controller 5 is at hand, the back of the upper part of the waist Heat circulates in the dents, giving a comfortable feeling and good usability. Wearing clothes from the upper part of the combustion device or using the combustion device attached to the clothes further enhances the heating effect.

The amount of heat required for heating varies depending on the mounting state of the combustion device, the outside air temperature, and individual differences, but is approximately 50 kcal.
/ H is a guide. This is close to the amount of heat dissipated by humans. However, in early spring, it may be smaller than this calorie,-
It requires a lot of heat when it is cold below 20 ° C.

In this embodiment, the control section 4 is provided to control the combustion in the combustion chamber 1. However, for example, the amount of fuel supplied from the fuel tank section 3 to the combustion chamber 1 by the remote controller 5 is controlled. Can be adjusted, the combustion of the heat source can be controlled. Further, if a combustion catalyst is provided in the combustion chamber 1, even if the fuel supply is stopped, if the catalyst temperature is equal to or higher than the activation temperature, recombustion can be performed only by supplying fuel again. The combustion control can be performed by the opening / closing operation of the solenoid valve based on the output from the control unit 4.

[0034]

As described above, according to the first aspect of the present invention, the supply heat amount can be easily adjusted and the ignition operation can be easily performed by controlling the combustion in the combustion chamber by the output from the control unit and the discharge ignition. Since the ignition circuit is close to the combustion chamber via the heat insulating layer, noise from the ignition wire is eliminated and malfunction of the ignition circuit due to abnormal temperature rise can be prevented.

According to the second aspect of the present invention,
Since air flows from the lower opening provided at the lower part of the ignition circuit to the upper opening provided at the upper part, the ignition circuit is cooled and can be kept at a temperature not higher than the allowable temperature limit.

According to the third aspect of the present invention,
Since the ignition circuit is composed of a double-sided through-hole plated substrate, cracking of the solder due to a heat cycle can be prevented, and a highly reliable ignition circuit can be realized.

According to the invention described in claim 4 of the present invention,
Since the total area of the upper convection port is larger than the total area of the lower convection port provided in the housing accommodating the combustion chamber, convection air thermally expanded in the housing can be efficiently discharged from the housing. You can get comfortable heating.

According to the invention described in claim 5 of the present invention,
By providing the radiating fins in the combustion chamber, the radiating area increases, and convective air flows along the radiating fins.
Efficient heat dissipation can be obtained, and more comfortable heating can be obtained by increasing the amount of heat dissipation.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a combustion apparatus according to an embodiment of the present invention as viewed from the front.

FIG. 2 is a configuration diagram of the combustion device viewed from a lower surface direction.

FIG. 3 is a perspective view of a combustion chamber of the combustion device.

FIG. 4 is a configuration diagram of the ignition circuit.

FIG. 5 is a sectional view of a circuit board of the ignition circuit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Casing 3 Fuel tank part 4 Control part 6 Ignition circuit 7 Heat insulation layer 21 Upper convection port 22 Lower convection port 23 Radiation fin 25 Upper opening 26 Lower opening 32 Double-sided through-hole plating board

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tohru Hanada 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. 72) Inventor Atsuhito Nakai 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A combustion chamber for generating heat of combustion, a fuel tank for storing fuel to be supplied to the combustion chamber, a control unit for controlling the heat of combustion in the combustion chamber, and discharge ignition by an output of the control unit. A combustion circuit, comprising: an ignition circuit for performing the heat treatment, wherein the ignition circuit is disposed in a housing accommodating the combustion chamber, and a heat insulating layer is provided between the ignition circuit and the combustion chamber. 2. The combustion device according to claim 1, wherein at least one upper opening and lower opening are provided near the ignition circuit of the housing. 3. The combustion device according to claim 1, wherein the ignition circuit is formed of a double-sided through-hole plated substrate. 4. A combustion chamber for generating combustion heat, a housing for accommodating the combustion chamber, a fuel tank storing fuel to be supplied to the combustion chamber, and a control unit for controlling combustion heat in the combustion chamber. Wherein the casing has at least one upper convection port and at least one lower convection port for obtaining convection due to combustion heat, and the total area of the upper convection port is larger than the total area of the lower convection port. . 5. The combustion device according to claim 4, wherein the combustion chamber is provided with a radiation fin extending so that air flows from the lower convection port to the upper convection port.