JPH11173549A - Catalyst combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate an ignition part by a given consumption power even when the voltage of a source part and to increase a using time of an apparatus by providing an increased life for the source part, in a catalyst combustion device convenient to carriage and utilizing heat through catalyst combustion of liquefied fuel gas. SOLUTION: Supply of fuel gas to a combustion part 18 is controlled by a fuel regulation part 22. Output fuel gas from the fuel regulation part 22 is ignited by an ignition part 20, and through oxidation reaction of fuel gas and air to each other at the combustion part 18, heat is generated. A power source is supplied to the ignition part 20 by a source part 25, a fuel regulation part 22 and the ignition part 20 are controlled by a control part 24, the control part 24 turns ON and OFF the ignition part 20 and control is effected such that operation is executed by a given consumption power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable and convenient catalytic combustion apparatus utilizing catalytic heat of liquefied fuel gas.

[0002]

2. Description of the Related Art Conventionally, this type of catalytic combustion apparatus has been configured as shown in FIGS. Hereinafter, the configuration will be described.

As shown in FIG. 7, a temperature control nozzle 1 is
Gas is supplied from one side, and a nozzle portion 2 having a small hole at the end is provided, and fuel gas is blown out from the nozzle portion 2 at high speed. The fuel gas entrains the surrounding air in the injector section 3 and becomes a mixture, which becomes a catalytic combustion section 4.
When the current flows through the heating wire 5 and becomes red hot, the fuel gas is ignited and the catalyst 6 is heated. When the temperature of the catalyst 6 rises, catalytic combustion starts. The temperature control nozzle 1 is heated by the heat of the catalytic combustion unit 4.

[0004] The temperature control nozzle 1 is configured as shown in FIG. 8. The temperature-sensitive ferrite 7 has a Curie point (for example, 150 ° C.) at which magnetic characteristics change rapidly, and is formed in a ring shape. It is fixed to the case 8. The magnet 9 is provided on the inner surface of the case 8 so as to face the temperature-sensitive ferrite 7 with a predetermined gap therebetween, and attracts the temperature-sensitive ferrite 7. The guide member 10 is fixed to the surface opposite to the temperature-sensitive ferrite 7. And
The valve member 11 is fixed to the guide member 10. The spring 12 urges the magnet 9 in a direction away from the temperature-sensitive ferrite 7.

The valve body 13 is provided with a valve port 14 facing the valve member 11 to form a valve, and a nozzle for injecting vaporized fuel gas toward the catalytic combustion section 4 at a position opposite to the valve port 14. Section 2 is provided. Temperature-sensitive ferrite 7, case 8, magnet 9, guide member 10, valve member 11, spring 1
2. A temperature control device for controlling the combustion temperature of the catalytic combustion unit 4 with the valve body 13 and the like. Reference numeral 15 denotes a fuel gas supply port.

When the fuel gas is supplied from the fuel gas supply port 15, the fuel gas passes through the center of the temperature-sensitive ferrite 7 and passes through the gap between the temperature-sensitive ferrite 7 and the magnet 9. After passing through the gap with the case 8, it reaches the valve port 14 and blows out from the nozzle portion 2. At this time, the fuel gas is entrained by the surrounding air in the injector section 3 and supplied to the catalytic combustion section 4 as an air-fuel mixture. When a current flows through the heating wire 5 and becomes red-hot, the gas is ignited and the catalyst 6 is heated. When the temperature of the catalyst 6 rises, catalytic combustion starts. The case 8 is heated by the catalytic combustion.

When the case 8 is heated, the temperature-sensitive ferrite 7 fixed to the case 8 is heated. When the temperature of the temperature-sensitive ferrite 7 exceeds the Curie point determined by the composition, the magnet 9 is moved to the temperature-sensitive ferrite 7. It cannot be adsorbed, is separated from the temperature-sensitive ferrite 7 by the spring 12, and the valve member 11
Moves to the valve body 13 side to close the valve port 14. As a result, the fuel gas is no longer supplied to the catalytic combustion section 4, and the temperature decreases.

The temperature-sensitive ferrite 7 has a very small hysteresis, and returns to the original state by a temperature change of several degrees or less. When the temperature-sensitive ferrite 7 returns, the magnet 9 attracts the temperature-sensitive ferrite 7 again and opens the valve port 14. During this time, the temperature of the catalyst 6 is sufficiently high, and the catalytic reaction starts again when the fuel gas is supplied. By repeating this operation, the temperature of the catalytic combustion section 4 can be kept constant.

[0009]

In such a conventional configuration, a battery is generally used as a power supply for supplying necessary power at the time of ignition. However, when the ambient temperature is low and the voltage of the battery is lowered, If the battery capacity decreases at the end of the battery capacity or the like, the amount of red heat of the heating wire 5 becomes small, and it becomes impossible to generate enough energy to ignite the fuel gas. As a result, the user has to keep pressing a switch (not shown) connecting the power supply unit and the heating wire 5 for a long time.

On the other hand, when a new battery is used, the battery voltage becomes high, so that the current flows too much in the heating wire 5 to cause extra red heat, and the heating wire 5 may be disconnected, or extra power may be consumed. Power consumption, the life of the power supply unit was shortened, and the equipment could not be used for a long time.

On the other hand, a battery is used as the power supply unit, and even if the voltage is reduced by using the battery, the heating wire 5
As a means for red-heating the heating wire in substantially the same state, a constant voltage device that applies a substantially constant voltage to the heating wire 5 regardless of the voltage of the battery may be provided between the battery and the heating wire 5. In this case, the configuration is complicated due to the constant voltage device, and when the battery is new and the voltage is high, the loss in the constant voltage device increases, and as a result, the life of the battery cannot be extended. Was.

The present invention solves the above-mentioned conventional problems, and operates the ignition section with a predetermined power consumption even if the voltage of the power supply section fluctuates, prolonging the life of the power supply section and prolonging the use time of the equipment. It is intended to be.

[0013]

According to the present invention, in order to achieve the above object, the supply of fuel gas to a combustion section is controlled by a fuel adjustment section, and the output fuel gas from the fuel adjustment section is ignited by an ignition section. The fuel gas and the air are oxidized in the combustion unit to generate heat, and power is supplied to the ignition unit from the power supply unit, and the fuel adjustment unit and the ignition unit are controlled by the control unit. It controls the unit to turn on and off so as to operate with a predetermined power consumption.

Thus, even if the voltage of the power supply unit fluctuates,
The ignition unit can be operated with a substantially constant predetermined power consumption, and the life of the power supply unit can be prolonged, and the operating time of the device can be prolonged.

[0015]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is directed to a combustion section for generating heat by oxidizing a fuel gas and air, and a fuel control for controlling the supply of the fuel gas to the combustion section. Unit, an ignition unit that ignites the output fuel gas from the fuel adjustment unit, a control unit that controls the fuel adjustment unit and the ignition unit, a power supply unit that supplies power to the ignition unit, and a power supply unit. A voltage detection unit that detects a voltage is provided, and the control unit controls the ignition unit to turn on and off to operate with a predetermined power consumption. Using a battery or the like as a power supply unit, the voltage of the power supply unit is high. Sometimes, the ignition unit does not consume extra power, and even if the voltage of the power supply unit decreases, the ignition unit can be operated with almost constant predetermined power consumption, resulting in a longer life of the power supply unit. The use time of the device can be extended.

According to a second aspect of the present invention, in the first aspect of the present invention, the control unit is configured to change an on-time of the ignition unit according to a voltage value of the power supply unit. When the voltage of the power supply unit decreases, the on-time of the ignition unit is prolonged, so that the ignition unit can be operated with a substantially constant predetermined power consumption even if the voltage of the power supply unit fluctuates. Power consumption, the life of the power supply unit can be extended, and the use time of the device can be extended.

According to a third aspect of the present invention, in the first or second aspect of the invention, the control unit is configured to change the off time of the ignition unit according to the value of the voltage of the power supply unit. When the voltage of the power supply unit decreases, the off time of the ignition unit is shortened, so that the ignition unit can be operated with a predetermined power consumption even if the power supply voltage fluctuates, and the ignition unit consumes extra power. In addition, the life of the power supply unit can be extended, and the use time of the device can be extended.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the igniting portion is formed of a heating wire, and the igniting portion has a simple configuration and is inexpensive. Even if a heating wire is used, the ignition portion does not glow excessively, so disconnection of the heating wire can be prevented, and the reliability of the heating wire can be improved.

According to a fifth aspect of the present invention, there is provided a combustion unit for generating heat by oxidizing a fuel gas and air, a fuel control unit for controlling supply of the fuel gas to the combustion unit, and a fuel control unit. A heating wire that ignites the fuel gas output from the fuel gas, a constant current unit that supplies a predetermined current to the heating wire, a control unit that controls the fuel adjustment unit and the heating wire, and supplies power to the heating wire. The power supply unit is provided, and the control unit is configured to operate the heating wire with a predetermined current by the constant current unit.By operating the heating wire with the predetermined current, a battery or the like is used for the power supply unit. However, even when the voltage is new and the voltage is high, the heating wire does not consume extra power, so that the life of the power supply unit can be prolonged and the operating time of the device can be prolonged.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block circuit diagram showing a main configuration of this embodiment, and FIG. 2 is a diagram in which a catalytic combustion device is mounted on clothes or the like and uses heat generated by catalytic combustion. is there.

As shown in FIGS. 1 and 2, the heating unit 16 includes a combustion unit 18 that generates heat by oxidizing a mixed gas of fuel gas and air sent from a fuel unit 17 and generates heat. It comprises a temperature detecting section 19 for detecting the temperature of 18 and an ignition section 20 for igniting the fuel gas from the fuel unit 17. The fuel unit 17 includes a fuel tank 21 that stores fuel gas, and a fuel adjustment unit 22 that controls supply of fuel gas to the combustion unit 18.

The combustion section 18 uses a combustion catalyst (not shown) to oxidize a mixed gas of fuel gas and air sent from the fuel tank 21 to generate heat. Ignition part 2
Numeral 0 is constituted by a heating wire, and a current flows through the heating wire to make it glow red and ignite the fuel gas. The fuel control section 22 is constituted by an electromagnetic valve or the like, and supplies fuel gas from the fuel tank 21 to the combustion section 18.
Or shut off. Ignition part 2
0 means that the operation is unnecessary if a flame is generated by igniting the fuel gas. The generated flame heats the combustion catalyst and thereafter shifts to catalytic combustion. When shifting to catalytic combustion, the ignition unit 2
The gas flowing into zero becomes exhaust gas and the flame goes out.

The power supply unit 23 receives an output signal of the temperature detection unit 19, detects a control unit 24 for controlling the ignition unit 20 and the fuel adjustment unit 22, a power supply unit 25, and detects a voltage of the power supply unit 25 to detect the voltage. Voltage detection unit 26 that outputs the result to control unit 24
It consists of: The power supply unit 25 is configured using a battery, and operates the control unit 24, the ignition unit 20, the fuel adjustment unit 22, and the temperature detection unit 19.

The control section 24 inputs the output of the temperature detection section 19 and controls the fuel adjustment section 22 to control the temperature of the combustion section 18 at a predetermined temperature. Further, the control unit 24 turns the ignition unit 20 on and off, changes the on time of the ignition unit 20 according to the value of the voltage of the power supply unit 25 detected by the voltage detection unit 26, and sets the ignition unit 20 to a substantially constant predetermined value. It is controlled to operate with power consumption.

The heating sheet 27 is attached to the heating unit 16 and is heated by the heating unit 16 to heat an object to be heated. The heating sheet 27 is made of a heat conductive material such as a metal foil, a metal mesh, and a heat conductive fiber having good heat conductivity. Make up. The heating unit 16 is connected to an intake pipe 28 for taking in air and an exhaust pipe 29 for emitting exhaust gas, and is configured to suck and exhaust through an intake and exhaust unit 30.

The operation of the above configuration will be described. When the operation of the device is started, the control unit 24
Is turned on to supply the fuel gas to the combustion unit 18 and the ignition unit 2
0 is operated for a predetermined time. At this time, the control unit 24 receives the output of the voltage detection unit 26 and changes the ON time of the ignition unit 20 according to the value of the voltage of the power supply unit 25.

FIGS. 3 (a) to 3 (c) show the power supply unit 2 respectively.
5 is a new high voltage battery, the power supply unit 25
FIG. 8 shows an operation time chart of the ignition unit 20 when the voltage of the battery constituting the power supply unit 25 approaches the end of capacity and the voltage further decreases when the voltage of the battery constituting the power supply unit 25 decreases;
The on-time a of the ignition section 20 is increased as the battery capacity approaches the end.

Thus, even if the voltage of the power supply unit 25 fluctuates, the ignition unit 20 can be operated with a substantially constant predetermined power consumption. Can be operated, and as a result, the life of the power supply unit 25 can be prolonged and the operating time of the device can be prolonged.

In this embodiment, the on-time a of the ignition unit 19 is changed according to the value of the voltage of the power supply unit 22, and the ignition unit 1 is turned on.
9 is operated so as to operate at a substantially constant predetermined power consumption. However, as shown in FIGS.
Needless to say, the same effect can be obtained even if the off time b of the ignition section 19 is changed depending on the value of the voltage of 2.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and the description is omitted.

As shown in FIG. 5, a switch section 31 is controlled by a control section 32. A constant current section 33 and a heating wire 34 constituting the ignition section 20 are connected in series to the switch section 31 so that a constant current is supplied. The heating wire 34 is operated by a predetermined current by the unit 33. Other configurations are the same as those of the first embodiment.
Is the same as

The operation of the above configuration will be described. When the operation of the apparatus is started, the control unit 32 turns on the fuel adjustment unit (not shown) and supplies the fuel gas to the combustion unit (not shown). Then, the switch section 31 is turned on, the constant current section 33 is connected to the power supply section 25, and the heating wire 34 is operated with a predetermined current by the constant current section 33.

As described above, by operating the heating wire 34 at a predetermined current, the battery constituting the power supply unit 25 is newly provided.
Even when the voltage is high, the heating wire 34 does not consume extra power, so that the life of the power supply unit 25 can be prolonged and the operating time of the device can be prolonged.

FIG. 6 shows an embodiment of the constant current section 33. The constant current section 33 comprises a DC / DC converter or the like and boosts the voltage of the power supply section 25 to a predetermined constant voltage. A resistor R for dividing the constant voltage boosted by the unit 35
1, R2, a power transistor 36 and a transistor 37. The transistor 38 is connected to the switch unit 3
1.

The operation of the above configuration will be described. When operating the heating wire 34, the control unit 32 sets the port P1 to "low" to turn on the transistor 38. When the transistor 38 is turned on, the voltage V1 boosted by the constant voltage unit 35 is divided by the resistors R1 and R2. The voltage V2 divided by the resistors R1 and R2 is represented by V2 = {R1 / (R1 + R2)} × V1. Similarly, the voltage V3 at the emitter of the transistor 37 is expressed as V3 = V2 + (voltage between the base and the emitter of the transistor 37).
4 can be represented by V4 = V3- (voltage between the emitter and the base of the power transistor 36).

Thus, even if the voltage of the power supply unit 25 fluctuates, while the predetermined voltage V1 is being output by the constant voltage unit 35, a predetermined current (V4 / heating wire 34) is applied to the heating wire 34.
, The heating wire 34 can be operated with a predetermined current.

[0038]

As described above, according to the first aspect of the present invention, a combustion section for generating heat by oxidizing a fuel gas and air, and supplying a fuel gas to the combustion section. A fuel adjustment unit that controls, an ignition unit that ignites the output fuel gas from the fuel adjustment unit, a control unit that controls the fuel adjustment unit and the ignition unit, and a power supply unit that supplies power to the ignition unit. The power supply unit is provided with a voltage detection unit for detecting the voltage, and the control unit controls the ignition unit to be turned on and off to operate at a predetermined power consumption. When the ignition is high, the ignition part does not consume extra power,
Even if the voltage of the power supply unit decreases, the ignition unit can be operated with a substantially constant predetermined power consumption, and as a result, the life of the power supply unit can be prolonged and the use time of the device can be prolonged.

According to the second aspect of the present invention, the control unit is configured to change the ON time of the ignition unit according to the value of the voltage of the power supply unit.
By increasing the on-time of the ignition unit, even if the voltage of the power supply unit fluctuates, the ignition unit can be operated with a substantially constant predetermined power consumption. The life of the unit can be prolonged, and the use time of the device can be prolonged.

According to the third aspect of the present invention, since the control unit is configured to change the off time of the ignition unit according to the voltage value of the power supply unit, when the voltage of the power supply unit decreases,
By shortening the off time of the ignition part, the ignition part can be operated with a predetermined power consumption even if the voltage of the power supply fluctuates, and the ignition part does not consume extra power and prolongs the life of the power supply part. As a result, the usage time of the device can be extended.

According to the fourth aspect of the present invention, since the igniting portion is formed of a heating wire, the igniting portion does not glow excessively even if an inexpensive heating wire with a simple configuration is used for the igniting portion. Therefore, disconnection of the heating wire can be prevented, and reliability of the heating wire can be improved.

According to the fifth aspect of the present invention, there is provided a combustion section for generating heat by oxidizing a fuel gas and air, a fuel adjusting section for controlling supply of the fuel gas to the combustion section, A heating wire that ignites the output fuel gas from the fuel adjustment unit, a constant current unit that supplies a predetermined current to the heating wire, a control unit that controls the fuel adjustment unit and the heating wire,
A power supply unit that supplies power to the heating wire, the control unit includes:
By operating the heating wire with a predetermined current by the constant current unit, by operating the heating wire with a predetermined current,
Even when a battery or the like is used for the power supply unit and the battery is new and the voltage is high, the heating wire does not consume extra power, so that the life of the power supply unit can be prolonged and the use time of the device can be prolonged.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of a catalytic combustion device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the catalytic combustion device.

FIG. 3A is an operation time chart of the ignition unit when the voltage of the power supply unit of the catalytic combustion device is high. FIG. 3B is an operation time chart of the ignition unit when the voltage of the power supply unit of the catalytic combustion device is low. (C) Operation time chart of the ignition section when the voltage of the power supply section of the catalytic combustion device further decreases

FIG. 4 (a) is an operation time chart of another example of the ignition unit when the voltage of the power supply unit of the catalytic combustion device is high. (B) The ignition unit when the voltage of the power supply unit of the catalytic combustion device decreases. (C) Operation time chart of the ignition section when the voltage of the power supply section of the catalytic combustion device is further lowered

FIG. 5 is a main part block circuit diagram of a catalytic combustion device according to a second embodiment of the present invention.

FIG. 6 is a main part circuit diagram of the catalytic combustion device.

FIG. 7 is a sectional view of a conventional catalytic combustion device.

FIG. 8 is a sectional view of a main part of the catalytic combustion device.

[Explanation of symbols]

 18 Combustion unit 20 Ignition unit 22 Fuel adjustment unit 24 Control unit 25 Power supply unit 26 Voltage detection unit

Continuation of the front page (72) Inventor Osamu Eguchi 1006 Kazuma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. A combustion unit that generates heat by oxidizing a fuel gas and air to generate heat, a fuel adjustment unit that controls supply of fuel gas to the combustion unit, and ignites an output fuel gas from the fuel adjustment unit. An ignition unit, a control unit that controls the fuel adjustment unit and the ignition unit, a power supply unit that supplies power to the ignition unit, and a voltage detection unit that detects a voltage of the power supply unit. A catalytic combustion device that controls the ignition part to turn on and off to operate at a predetermined power consumption. 2. The catalytic combustion device according to claim 1, wherein the control unit changes the on-time of the ignition unit according to the value of the voltage of the power supply unit. 3. The control unit according to claim 1, wherein the control unit changes the off time of the ignition unit according to a voltage value of the power supply unit.
3. The catalytic combustion device according to item 1. 4. The ignition unit according to claim 1, wherein the ignition unit is formed of a heating wire.
The catalytic combustion device according to any one of the above. 5. A combustion unit that generates heat by oxidizing a fuel gas and air to generate heat, a fuel adjustment unit that controls supply of the fuel gas to the combustion unit, and ignites an output fuel gas from the fuel adjustment unit. A heating unit, a constant current unit that supplies a predetermined current to the heating wire, a control unit that controls the fuel adjustment unit and the heating wire, and a power unit that supplies power to the heating wire. Is a catalytic combustion device configured to operate a heating wire with a predetermined current by a constant current unit.