JPH0144971Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a hot air heater used mainly in bungalows and tents at campgrounds.

<Conventional technology> Conventionally, heaters for outdoor use are direct combustion types that burn kerosene or solid fuel at high temperatures, and the combustion gas is sent to the heating area. It was starting to warm up.

<Problem that the invention aims to solve> If a direct combustion type heater such as the one mentioned above is used in a small bungalow or tent with the entrance closed off, the indoor air will become contaminated and there is a risk of early oxygen depletion. Yes, and since the combustion temperature is high,
It had drawbacks such as being dangerous if handled incorrectly.

<Means for Solving the Problems> The present invention has been made in view of the above-mentioned problems, and includes a fuel gas container, a catalytic combustion section that catalytically burns fuel gas by contacting it with a catalyst bed, In a hot air heater equipped with a heat exchanger connected in communication with the catalytic combustion section, and a fan that is rotated by the drive of a motor and blows air through the heat exchanger, a thermoelectric power generation element or solar rays that receives heat from the heat exchanger is provided. The battery includes at least one of the batteries and a rechargeable battery that is charged by the electromotive force of at least one of the thermoelectric generating element or the solar cell, and the motor is driven by the rechargeable battery.

<Operation> According to the present invention, the fuel gas undergoes catalytic combustion when it comes into contact with the catalyst, so there is no flame or high temperature generated as in direct combustion, and there is no risk of fire spreading to nearby items or causing burns. It is safe to use, and there is no danger of burning, and since the combustion gas is not sent directly into the heating area, the fresh air that has exchanged heat with the combustion gas is sent out as warm air. It does not become contaminated and does not cause oxygen deficiency even if used for a long time.

Furthermore, since it includes a thermoelectric generating element or a solar cell, and a battery that is charged by the electromotive force of at least one of them, it is possible to self-replenish the driving power of the fan's motor.

<Example> Hereinafter, the present invention will be described in detail based on an example shown in the drawings. Fig. 1 is a front view schematically showing the internal structure of the heater of the present invention, and Fig. 2 is a side view thereof. , a heat exchanger 4, and a fan 5.

The main body frame 1 has a grill 6 for blowing out hot air on the front, and an air intake part 7 on the back or side. In this embodiment, the fuel gas containers 2 are a plurality of cylindrical cylinders, and are housed and fixed at the bottom of the main body frame 1. The catalytic combustion section 3 is a section that catalytically burns the fuel gas by contacting with a catalyst without producing a flame, and includes a mixer 8 that mixes a required amount of air with the fuel gas from the fuel gas container 2, and a mixer 8 that mixes the required amount of air with the fuel gas from the fuel gas container 2. A nozzle 9 that spouts gas and a gas receiver 10 that is disposed opposite to the nozzle 9 above the nozzle 9
and a catalyst bed 11 attached to the center of the gas receiving section 10. Gas from each fuel gas container 2 is supplied to the mixer 8 from an attachment 12 through an operating section 13 and piping 14 . The gas receiving section 10 is directly connected to the duct of the heat exchanger 4, and on its outer surface there is a heater 15 for heating the catalyst bed 11, and a normally closed heater 15 that is turned off when the gas receiving section 10 is heated. A heat-sensitive relay 16 is attached. The catalyst of the catalyst bed 11 is Pt, Pb,
Cu ₂ Cr ₂ O ₅ etc. are used. Further, instead of the heater 15, a piezoelectric igniter or the like can also be used.

The heat exchanger 4 introduces fuel gas into its duct through the gas receiving portion 10, and discharges the combustion gas to the outside through an exhaust port 17 opened at the upper rear surface of the main body frame 1. The fan 5 is located on the back side of the heat exchanger 4 and is rotated by a motor 18 to blow air forward through the fins of the heat exchanger 4. This motor 18 is driven by a commercial power source installed in the bungalow or an external power source such as a car battery, but in this embodiment, a rechargeable battery 19 is installed in the main body frame 1. It has a built-in battery and is powered by the battery 19. A thermoelectric power generation element 20 is mounted inside the main body frame 1 above the heat exchanger 4, and a solar cell 21 is mounted on the outer surface of the main body frame 1.

The operation unit 13 includes a valve 22 that controls the supply of fuel gas, a motor 18, and a rechargeable battery 19.
The electric circuit including the motor 18 and the rechargeable battery 19 is as shown in the circuit diagram of FIG. That is, a rechargeable battery 19 is connected to the motor 18 via a power switch 23, and a thermoelectric generating element 20 and a solar cell 21 are connected to the rechargeable battery 19 separately via forward diodes 24 and 25, respectively. has been done. The motor 18 also includes a thermal relay 16, a current limiting resistor 26, and a light emitting diode 2 for ignition indication.
7 are connected in series. Furthermore, the motor 18
A heater 15 is connected to the heater switch 28 via a heater switch 28. Thus, the valve 22, power switch 23, and heater switch 28 are configured to open and close in accordance with the rotation angle of the knob of the operating section 13.

In the above configuration, when the knob of the operating unit 13 is turned from the off position to the first position a, the power switch 23 is turned on, the motor 18 is started, the fan 5 is rotated, and the light emitting diode 27 is lit. By lighting up this light emitting diode 27,
This indicates that the rechargeable battery 19 is charged to the required voltage, and if the light emitting diode 27 does not light up, it means that the rechargeable battery 19 is not sufficiently charged. It is necessary to charge the battery until the required charging voltage is reached. When the knob is further turned past the b position to the c position, the heater switch 28 is turned on. At this position c, the gas passage is fully open and fuel gas is ejected from the nozzle 9 through the mixer 8. At this time, since both the power switch 23 and the heater switch 28 are on, the rechargeable battery 19 is connected to the heater 15 and energizes the heater 15, causing the heater to generate heat. The catalyst bed 11 is heated by the heat generated by the heater 15 . When the catalyst bed 11 is heated to the required temperature, catalytic combustion of the combustion gas by the catalyst begins. Thermal relay 16 is activated at the start of catalytic combustion.
is turned off, and the light emission from the light emitting diode 27 disappears. It can be seen that catalytic combustion has started when the light emitting diode 27 is turned off.

When the operating force on the knob of the operating unit 13 is removed, the knob returns to position b due to the biasing elasticity, and the heater switch 28 is turned off, but the power switch 23 is kept in the on state. Further, the gas passage is kept fully open. Since the catalytic combustion of the fuel gas continues in the catalytic combustion section 3, the temperature of the heat exchanger 4 increases. Since the fan 5 blows air from the back side of the heat exchanger 4, hot air is blown out from the heat exchanger 4.

Heat radiation from the heat exchanger 4 generates an electromotive force in the thermoelectric generating element 20, which charges the rechargeable battery 19 and replenishes the power consumed by the motor 18. Further, when placed outdoors when not in use, an electromotive force is generated in the solar cell 21 due to sunlight irradiation, and the rechargeable battery 19 is also charged by this electromotive force.

<Effects of the invention> As described above, according to the invention, since the fuel gas undergoes catalytic combustion through contact with the catalyst, there is no flame or high temperature generated as in direct combustion, and there is no possibility of damaging nearby objects. There is no risk of catching fire or getting burned, and it can be used safely even in confined spaces such as inside a bungalow or tent.

Moreover, the combustion gas is not sent directly into the heating area, but instead the fresh air exchanged with the fuel gas is sent out as warm air, so the indoor air is not polluted and can be used for long periods of time. does not cause oxygen deficiency.

Furthermore, since the catalytic combustion section burns the fuel gas at a lower temperature than direct combustion, there is no need to use a highly heat-resistant structure, and there is an advantage that it can be manufactured at low cost.

Moreover, if a fan is installed to blow hot air,
A power source is required to drive the fan, which is an impediment to outdoor use.However, in the present invention, a thermoelectric power generation element or solar cell that utilizes the heat dissipation of the heat exchanger, and one of these are used. A rechargeable battery that is charged by the electromotive force of the fan is provided, and the fan motor is driven by this rechargeable battery, making it possible to self-supply the fan's driving power without using any external power source. Therefore, it is extremely convenient for outdoor and portable use.

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing the internal structure of the heater of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is an electric circuit diagram. 1... Body frame, 2... Fuel gas container, 3
... Catalytic combustion section, 4 ... Heat exchanger, 5 ... Fan, 11 ... Catalyst bed, 18 ... Motor, 19 ...
Rechargeable battery, 20... thermal power generation element, 21... solar cell.

Claims (1)

[Scope of Claim for Utility Model Registration] A fuel gas container, a catalytic combustion section that catalytically combusts fuel gas by contact with a catalyst bed, a heat exchanger connected to the catalytic combustion section, and a heat exchanger that is rotated by the drive of a motor. A hot air heater equipped with a fan that blows air through the heat exchanger, at least one of a thermoelectric generating element or a solar cell receiving heat from the heat exchanger, and an electromotive force of at least one of the thermoelectric generating element or the solar cell. A hot air heater comprising a rechargeable battery that is charged, and the motor being driven by the rechargeable battery.