KR100989376B1 - Far Infrared Ray Generation Apparatus - Google Patents

Abstract

Disclosed is a far-infrared generator that can generate far-infrared rays effectively by a simple structure, and provide air or oxygen mixed with gas to increase combustion efficiency and minimize generation of harmful gases even when installed in an indoor enclosed space. . To this end, the present invention is connected to the gas injection unit for injection of the combustion gas on one side, the housing having a receiving space therein, a porous catalyst layer containing a ceramic component in the housing, the catalyst layer is provided in the housing is the catalyst layer It includes a preheating unit for preheating the catalyst layer so as to be burned by, and an air mixing unit which is provided on one side of the flow path of the gas injection unit to supply oxygen into the gas injection unit and mix with the combustion gas in the gas injection unit It provides a far-infrared generator, characterized in that configured. Therefore, according to the present invention, there is an advantage that it is possible to minimize the generation of harmful gases by increasing the combustion efficiency.

Far Infrared Ray, Precious Metal Catalyst, Air Mixing Part

Description

Far Infrared Ray Generation Apparatus {Far Infrared Ray Generation Apparatus}

The present invention relates to a far-infrared ray generator, and more particularly, to a far-infrared ray generator to increase the combustion efficiency by minimizing the generation of harmful gases by supplying air or oxygen mixed with gas.

Infrared rays are a kind of electromagnetic waves that have a longer thermal activity than red regions of visible light, and far infrared rays have a long wavelength among infrared rays, and near infrared rays have a short wavelength among infrared rays.

These far infrared rays are invisible, absorbed well by materials, and have strong resonance and resonance effects on organic compound molecules. In addition, since light generally reflects well when the wavelength is short and absorbs well when it reaches an object when the wavelength is long, the long infrared rays have a strong penetrating power, and the human body also warms them when they emit such far infrared rays. For example, in the water of 30 ℃ hardly feel the warm energy, but sitting in the sun at the same temperature can feel warm because the infrared rays contained in the sun penetrates deep into the skin to create heat.

This heat action helps to eliminate the bacteria that cause various diseases, and helps to expand the capillaries and blood circulation and tissue formation. In addition, by touching the water and protein molecules constituting the cell to shake the cell finely 2,000 times per minute to activate the cell tissue has excellent effects in preventing various adult diseases such as aging, promoting metabolism, chronic fatigue.

In addition, since the wavelength of the far infrared rays is very close to the natural frequency of the water molecules, the wavelength of the far infrared rays is well absorbed and the temperature is rapidly increased by the energy. Therefore, when directly acting on water molecules corresponding to 70% of the human body, far infrared rays play a very useful role in health as well as heat transfer effect.

Far infrared rays are characterized by heating at the same time not only the surface of the object but also the inside due to resonance and resonance, so that it can be uniformly heated during heating and save energy by shortening the heating time.

In order to generate such far-infrared rays, it is common to use functional ceramics. For example, metal oxides such as Al ₂ O ₃ and SiO ₂ mixed with one or more metal elements and nonmetal elements are used.

As such, in order to take advantage of the various advantages of far-infrared rays on the human body, various configurations for far-infrared generation in heating devices have been proposed.

As an example of such an apparatus, far-infrared heaters have recently been developed that include a burner that receives fuel and burns it to generate heat, and a combustion tube connected to the burner to discharge heat generated from the burner to the outside. The far-infrared heater having the above configuration is configured to coat the ceramic material for generating far infrared rays on the surface of the combustion tube, so that the ceramic material absorbing the heat of combustion generates far-infrared rays which are beneficial to the human body.

On the other hand, the far-infrared heater is configured to increase the area of contact with the combustion tube and air by bending the combustion tube in several layers to reduce heat lost to the atmosphere.

However, even if the combustion tube is bent in several layers as described above, since the residual heat occupies a large portion of the total generated heat, heat generated in the air is generated more than necessary, resulting in poor thermal efficiency.

Along with this, the ceramic material is coated on the surface of the combustion tube to generate far infrared rays, but there are many limitations in increasing the amount of far infrared rays generated therethrough.

In addition, the far-infrared generator using the gas-type dryer has been developed recently, but in the case of the gas-type not completely burned, it is inappropriate to use in a closed indoor space because a lot of substances harmful to the human body is generated.

The present invention has been made to solve the above problems and drawbacks of the prior art, the object of the present invention is to generate far infrared rays by heating the gas supply and further supply sufficient oxygen during heating for far infrared generation of the gas It is to provide a far-infrared generator that minimizes the generation of substances harmful to the human body in the process of generating far-infrared by making a complete combustion.

Another object of the present invention is to provide a far-infrared generator which minimizes heat loss and improves energy efficiency.

It is still another object of the present invention to provide a far infrared ray generating apparatus capable of generating a large amount of far infrared rays by a simple structure.

In order to achieve the above object, the present invention is provided with a gas injection unit for injection of the combustion gas on one side, the housing space is formed therein and disposed in a state spaced apart from the gas injection unit in the housing A porous catalyst layer formed on a plate-shaped base plate having a plurality of communication holes and a size corresponding to the base plate in the housing, and provided on the base plate and coated with a noble metal catalyst on a ceramic component layer; It is formed in a size corresponding to the base plate is provided on the base plate, a plurality of heat insulating layers made of porous ceramic fibers and provided in the housing between one of the heat insulating layer and the other heat insulating layer of the plurality of heat insulating layers to reserve the heat insulating layer The heating of the catalyst layer by heating Spacer and the gas injection portion to secure the position of the base plate to the inside of the housing to ensure a predetermined interval spaced apart from the pre-heating portion and the base plate and the lower portion of the housing to induce a combustion reaction An air mixing part including a communication hole provided to supply oxygen into the gas injection part to one side of the flow path and mixed with the combustion gas in the gas injection part, and a protruding guide pipe protruding outwardly by a predetermined length from the communication hole. Provided is a far infrared ray generating device configured to include.

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In addition, the concentrated oxygen is stored therein, and may further include an oxygen storage tank in communication with the air mixing unit for supplying the concentrated oxygen to the air mixing unit.

The apparatus may further include a supply pump for injecting external air into the air mixing unit at a predetermined pressure.

On the other hand, the injection nozzle for injecting gas is installed inside the gas injection portion, it is preferable that the air mixing portion is disposed between the injection nozzle and the housing.

And, further comprising a temperature measuring unit for measuring the temperature around the catalyst layer; Preferably, the preheater stops the operation when the temperature measured by the temperature measurement unit exceeds the predetermined reference value after the initial operation.

In addition, it is preferable to further comprise an oxygen detecting unit for detecting the oxygen concentration around the catalyst layer to block the combustion gas supply to the gas injection side when the oxygen concentration is less than a predetermined amount.

On the flow path toward the gas injection unit, if it is determined that the leakage of the combustion gas is detected gas leakage may further include a leak detection unit for blocking the combustion gas supply to the gas injection unit side, on the flow path toward the gas injection unit, By controlling the supply pump for supplying oxygen into the housing may be provided with a pressure controller for adjusting the pressure of oxygen.

The far infrared ray generating apparatus according to the present invention having the above structure has the following effects.

First, there is an advantage that it is possible to minimize the emissions of harmful gases, such as total hydrocarbons generated during incomplete combustion by improving the combustion efficiency by providing an air mixing unit to be supplied with oxygen is mixed with the supply of gas.

Second, by detecting the concentration of oxygen or carbon dioxide, or by providing a variety of sensing unit for detecting conduction or leakage, there is an advantage that can effectively prevent various safety accidents that can occur when using the far-infrared generator in the human body.

Third, since the present invention generates only carbon dioxide and water during combustion and does not generate any nitrogen oxides, sulfur oxides, carbon monoxide, etc., which are harmful to the human body, various pollutions do not occur, and the generation of human harmful elements due to the combustion reaction can be prevented. There is an advantage to that.

Fourth, the present invention has the advantage of effectively generating a large amount of far infrared rays by a simple structure. Specifically, by forming a plurality of communication holes in the base plate inside the housing and configured to evenly supply the combustion gas to the catalyst layer through these communication holes, the combustion reaction in the catalyst layer is smoothly generated, resulting in a large amount of far infrared rays To help.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention can be specifically realized the object of the present invention. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

First, referring to the attached Figures 1 to 4, the overall configuration of the far-infrared generator according to the first embodiment of the present invention will be described. 1 is a perspective view showing the appearance of the far-infrared generator according to the present embodiment, FIG. 2 is a perspective view showing the combustion unit of FIG. 1, FIG. 3 is an exploded perspective view of FIG. 2 and FIG. 4 is a sectional view of FIG.

The far-infrared generator 10 according to the present embodiment includes a main body 100, a combustion unit 200 mounted in the main body 100, and various sensing units 310, 320, 330, and 340 (see FIG. 10).

The main body 100 has a combustion unit 200, various sensing units 310, 320, 330, 340 is assembled therein, and a control panel 110 for controlling various operations of the device is provided at the bottom of the front.

Here, the control panel 110 may be composed of various indicators, control levers and buttons, etc., and may be variously modified in accordance with the user environment.

Attached FIG. 1 illustrates an outer appearance of the main body 100 in which the far-infrared generator 10 is assembled, and is configured as a wall-mounted type installed on a wall surface.

However, alternatively, it is also possible to configure the stand type so that it can stand on the ground.

As shown in FIGS. 2 and 3, the housing 210 is installed inside the main body 300 with the front open and at the same time as the main body 100. Form a space.

In addition, a gas injection unit 212 for supplying combustion gas to the rear side of the housing 210 is connected. Here, the combustion gas may be LPG, city gas (NG), butane gas, and the like.

In addition, the base plate 220 is provided in the housing 210 and is disposed at a predetermined interval from the gas injection unit 212. Here, the base plate 220 has a flat plate shape, and a plurality of minute through holes 222 (see FIG. 6) are disposed at a predetermined interval horizontally and vertically.

On the other hand, in one embodiment of the present invention, as shown in the accompanying Figure 4, to fix the gas inlet 212 to the rear side of the base plate 220 and the housing 210 at a predetermined interval spaced state A spacer 214 is provided on the rear side of the housing 210.

Therefore, the combustion gas introduced into the housing 210 through the gas injection unit 212 is once spread to the space between the rear side of the housing and the base plate, the through holes 222 of the base plate 220 While spreading through the through hole 222 evenly spread in the region having a certain area.

In addition, the front of the base plate 220 is provided with a preheating unit 250 for generating heat to create a high-temperature atmosphere inside the housing 210.

The preheater 250 is a component that preheats the catalyst layer 270 so that the catalyst layer 270, which will be described later, is combusted by combustion gas, and operates for a predetermined time after initial operation to generate heat. Let's do it.

Meanwhile, one or more heat insulating layers 240 and 260 made of porous fiber may be provided around the preheating part 250. 4 exemplarily illustrates a form in which the heat insulation layers 240 and 260 are provided at the front and the rear of the preheater 250, respectively.

The heat insulation layers 240 and 260 serve to prevent heat from escaping to the outside, and to evenly transfer the combustion gas passed through the base plate 220 onto the surface of the catalyst layer 270.

The heat insulation layers 240 and 260 are made of a heat resistant material so that deformation does not occur even when the temperature rises while the combustion reaction occurs by the combustion gas in the catalyst layer 270, and preferably made of a porous material so that the combustion gas can pass smoothly. As an example of such a material, the heat insulation layers 240 and 260 may be made of fiber glass or ceramic fiber. In particular, when using a ceramic fiber as a heat insulating material has the advantage of excellent safety, as the ceramic fiber can be used currently Kaowool (Kaowool) and the like.

The catalyst layer 270 is provided in front of the preheater 250 and is made of a porous material coated with a noble metal catalyst on a layer made of ceramic. Platinum (Pt), rhodium (Rh) or palladium (Pd) may be used as the noble metal catalyst.

Combustion gas is uniformly supplied to the catalyst layer 270 on the surface, and as the catalyst layer 270 becomes a high-temperature atmosphere at a predetermined temperature or more, the combustion gas generates an oxidative combustion reaction without a flame and heat is generated in the process. This is generated in large quantities.

The combustion reaction is as follows for LPG.

C ₃ H ₉ + 5O ₂ = 3CO ₂ + 4H ₂ O + ΔH (exothermic).

In the case of city gas (NG), the combustion reaction equation is as follows.

CH ₄ + 2O ₂ = CO ₂ + 2H ₂ O + ΔH (exothermic).

Catalytic combustion as in the embodiment of the present invention generates a large amount of far infrared rays during combustion, when used in the human body it is possible to obtain a variety of medical effects according to the far infrared with effective heat transfer. In addition, since it is a direct heating method, there is no heat loss, high energy efficiency, a large amount of negative ions are generated by decomposing moisture generated during combustion, and has an excellent deodorizing and antibacterial effect.

In addition, mesh layers 230 and 280 having a mesh shape may be provided in the housing. In the present embodiment, as shown in FIG. 4, the lower mesh layer 230 and the upper mesh layer 280 are provided in front of the base plate 220 and in front of the catalyst layer 270, respectively. The form is illustrated.

On the other hand, when only the pure gas is supplied in the case where the combustion of the gas in the case 300, complete combustion is difficult due to the lack of oxygen.

In particular, when using the far-infrared generator of the present invention in an enclosed space, the oxygen in the indoor space is used for each combustion, and thus, the amount of oxygen contained in the indoor air gradually decreases over time. This results in incomplete combustion and leads to the generation of harmful gases due to incomplete combustion.

In order to prevent this, sufficient air must be mixed and supplied with the injected gas.

Therefore, referring to the accompanying FIG. 7, the far-infrared generator according to the exemplary embodiment of the present invention includes an air mixing unit configured to supply air or oxygen to the gas supplied to the gas injection unit 212.

That is, by supplying air or oxygen mixed with a gas to achieve a more complete combustion when gas burning in the catalyst layer 270.

Preferably, the air mixing part is provided in the gas injection part 212, and the communication hole 217 is provided in the gas injection part 212 itself.

That is, when gas is injected, since the gas flows at a high speed inside the gas injection unit 212, the gas injection unit is provided through the communication hole 217 in which external air around the communication hole 217 has a tubular shape. (212) flows into the interior.

In this case, the protruding induction pipe 218 is provided on the gas injection unit 212 so that even a small amount of gas is smoothly injected into the communication hole 217 of only ambient air, without allowing the gas to leak out of the gas injection unit. It is preferable to be.

As shown in FIG. 7, the protruding induction pipe 218 is not simply provided with a communication hole 217, but has a shape protruding a predetermined length toward one side of the radius of the gas injection unit 212. It may have a structure extending from 217.

In this embodiment, as the protruding induction pipe 218 protruding from the communication hole 217 is provided, the outside air is also mixed together when the gas is supplied, and as a result, the combustion efficiency can be increased, leading to complete combustion. You can do it.

In addition, the present embodiment is provided with a check valve 215 on the flow path toward the gas injection unit 212, the combustion gas is supplied only to the housing side, it is configured to block the flow in the reverse direction.

Although FIG. 7 illustrates a form in which the check valve 215 is provided in the gas injection unit 212, the check valve 215 is provided on the flow path of the protruding induction pipe 218 instead of inside the gas injection unit 212. It is also possible.

As described above, the present embodiment includes a check valve 215 for controlling the combustion gas to flow only in a specific direction, thereby preventing the safety accidents caused by the combustion gas backflow.

On the other hand, it is also possible to supply oxygen directly, as shown in Figure 8 attached. Referring to FIG. 8, an oxygen storage tank 400 is directly connected to the gas injection unit 212.

In this case, as shown in the drawing, after the control valve 450 is further provided, oxygen is supplied from the oxygen storage tank 400 to the gas injection unit 212 at an appropriate pressure using the control valve 450. do.

Alternatively, as shown in FIG. 9, a supply pump 470 for supplying air is connected to the protruding induction pipe 218 provided in the gas injection unit 212, and the supply pump 470 if necessary. By using the pump the air outside the gas injection unit 212 may be supplied to be mixed with the injected gas.

Meanwhile, in the various embodiments of mixing air or oxygen, the gas injection unit 212 may include an injection nozzle 216 through which gas is injected.

In addition, when the injection nozzle 216 is provided inside the gas injection unit 212, a portion where air or oxygen is mixed may be provided between the housing 210 and the injection nozzle 216, but is not limited thereto. It doesn't work.

Hereinafter, with reference to the accompanying FIG. 10, the operation principle of the far-infrared ray generating apparatus according to the embodiment of the present invention will be described.

As described above, the combustion unit 200 includes a preheater 250 for preheating the catalyst layer 270, and a catalyst layer 270 in which combustion gas is supplied and an actual combustion reaction occurs.

Therefore, a gas supply unit 170 is provided to supply gas to the catalyst layer 270, and a power supply unit 180 is provided to supply electricity to generate heat from the preheater 250.

On the other hand, the preheating unit 250 is a component in charge of the preheating function for the combustion of the catalyst layer 270, the preheating unit 250 is a predetermined preheating time is set using a timer or the like to operate after the set preheating time. It can be configured to stop.

Unlike this, a temperature measuring unit 290 is provided to measure the temperature around the catalyst layer 270 of the combustion unit 200, and the preheating unit when the temperature measured by the temperature measuring unit 290 is equal to or more than a preset reference value. It is also possible to configure 250 to stop operation.

In the embodiment of the present invention, for example, the reference value is set to 250 ℃, the preheater 250 is configured to stop the operation after operating up to the temperature of the set reference value. Here, the reference value is advantageously set to a low temperature for shortening the initial preheating time, it is advantageously set to a high temperature for complete combustion. Therefore, the reference value may be set to various values in accordance with design conditions, installation conditions, and the like.

On the other hand, the present invention far infrared ray generating apparatus further includes a variety of sensing units for safety (310, 320, 330, 340).

First, the oxygen detecting unit 310 detects the oxygen concentration around the catalyst layer 270 and serves to block the combustion gas supply to the gas injection unit 212 when the oxygen concentration is less than a predetermined amount.

Next, a carbon dioxide detector 320 is provided and configured to detect the carbon dioxide concentration around the catalyst layer 270. And when the carbon dioxide concentration measured by the carbon dioxide detection unit 320 is a predetermined amount or more is configured to block the combustion gas supply to the gas injection unit 212 side.

In addition, the conductivity detecting unit 330 is provided and configured to detect the attitude of the housing 210. When the posture change amount of the housing 210 is determined by the conductivity detecting unit 330 to be a predetermined value or more, the combustion gas supply to the gas injection unit 212 is cut off.

That is, the far-infrared generator 10 is configured to be automatically extinguished by measuring an amount of change in the attitude of the housing 210 by the conduction detection unit 330 when it is shaken or impacted or is inverted.

And, on the flow path toward the gas injection unit 212, a leak detection unit 340 for detecting the leakage of the combustion gas is provided, if the gas detection unit is determined to leak the gas by the leak detection unit 340 Configured to block the combustion gas supply to the side 212.

In addition, on the flow path toward the gas injection unit 212, a pressure controller 160 for controlling the pressure of oxygen into the housing 210 may be provided.

In this case, the pressure of the oxygen may be made by adjusting the control valve 450 (see FIG. 8) or the supply pump 470 (see FIG. 9).

In addition, the control valve 172 for controlling the amount of combustion gas is preferably provided on the gas flow path supplied from the gas supply unit 170 for supplying the gas to the catalyst layer 270. This is because the temperature of the far-infrared generator 10 can be adjusted as a result by adjusting the supply amount of the combustion gas supplied.

On the other hand, the present invention, the far-infrared generating device, as shown in the accompanying Figures 7 to 9, when the gas is injected into the communication hole 217, the oxygen storage tank 400 of the oxygen supply or the outside air by pumping the Air or oxygen is mixed and injected into the gas injected into the housing 210 through the supply pump 450 to be injected into the gas injection unit, so that oxygen is sufficient during the gas combustion process in the catalyst layer 270 to provide a more complete It can be burned.

By doing in this way, generation | occurrence | production of the total hydrocarbon etc. which arise at the time of incomplete combustion can be suppressed.

Indeed, while a gas heating type far-infrared generator or a drying apparatus is inadequate to be installed in an enclosed room due to the generation of a large amount of total hydrocarbons, that is, harmful gases, according to the embodiments of the present invention configured as described above When operating the far-infrared generator, it is possible to minimize the generation of harmful gases by inducing complete combustion, so that it can be used in an enclosed space indoors.

The present invention is not limited to the above-described embodiments, and as can be seen in the appended claims, those skilled in the art can make modifications without departing from the spirit of the present invention, and such modifications are possible. Belongs to the scope of.

1 is a perspective view showing the appearance of a far-infrared ray generator according to an embodiment of the present invention;

2 is a perspective view of the combustion unit of FIG.

3 is an exploded perspective view of FIG. 2;

4 is a cross-sectional view of FIG. 2;

FIG. 5 is a perspective view illustrating a configuration of the heat insulation layer and the preheating unit of FIG. 4; FIG.

6 is a perspective view of the base plate of FIG. 4;

7 is a view schematically showing a far-infrared ray generating device provided with a communication hole in a gas injection unit;

8 is a view schematically showing a far infrared ray generator having an oxygen storage tank;

9 is a schematic view of a far-infrared generator equipped with a pump for providing air;

10 is a diagram illustrating an internal configuration of FIG. 1.

<Explanation of Signs of Major Parts of Drawings>

10: far infrared ray generator 100: main body

110: control panel 120: support frame

130: moving wheel 150: oxygen supply unit

160: pressure controller 170: gas supply unit

180: power supply unit 200: combustion unit

210: housing 220: base plate

212: gas injection unit 217: communication hole

230: lower mesh layer 240: lower insulating layer

250: preheating unit 260: upper insulating layer

270: catalyst layer 280: upper mesh layer

290: temperature measuring unit 400: oxygen storage tank

 450: valve 470: supply pump

Claims (13)

A housing having a gas injection unit for injecting combustion gas at one side and having a receiving space therein; A base plate having a plurality of communication holes formed in the housing at a predetermined distance from the gas injection unit and having a plurality of communication holes; A porous catalyst layer formed in a size corresponding to the base plate in the housing and provided on the base plate and coated with a noble metal catalyst on a layer of a ceramic component; A plurality of heat insulation layers formed on a size corresponding to the base plate and provided on an upper portion of the base plate and made of porous ceramic fibers; A preheating unit provided between the one heat insulating layer and the other heat insulating layer of the plurality of heat insulating layers in the housing to induce a combustion reaction over the entire area of the catalyst layer by preheating the heat insulating layer; A spacer configured to form a state where the gas injection portions of the base plate and the lower part of the housing are spaced apart from each other at a predetermined interval, and stably fix the position of the base plate to the inside of the housing; And A communication hole provided to supply oxygen into the gas injection part to one side of the flow path of the gas injection part and mixed with the combustion gas in the gas injection part, and a protruding guide pipe protruding outwardly by a predetermined length from the communication hole; An air mixing unit configured; Far infrared ray generating device configured to include. delete delete The method of claim 1, The oxygen storage tank further stores the concentrated oxygen therein, the oxygen mixing tank for supplying the concentrated oxygen to the air mixing unit in communication with the air mixing unit. The method of claim 4, wherein Far infrared ray generator, characterized in that it further comprises a supply pump for injecting outside air at a predetermined pressure to the air mixture. The method of claim 1, An injection nozzle for injecting gas is installed inside the gas injection unit. And the air mixing part is arranged between the injection nozzle and the housing. The method of claim 1, Further comprising a temperature measuring unit for measuring the temperature around the catalyst layer; The pre-heating unit after the initial operation far infrared ray generator characterized in that the operation is stopped when the temperature measured by the temperature measuring unit is more than a predetermined reference value. The method of claim 1, Far-infrared ray generating apparatus for detecting the oxygen concentration around the catalyst layer further comprises an oxygen detecting unit to block the combustion gas supply to the gas injection side when the oxygen concentration is less than a predetermined amount. The method of claim 1, The far-infrared generator on the flow path toward the gas injection unit, further comprising a leak detection unit for detecting the leakage of the combustion gas to block the combustion gas supply to the gas injection unit side when it is determined that the gas leakage. The method of claim 1, On the flow path toward the gas injection portion, Far-infrared generator, characterized in that the pressure controller for controlling the pressure of the oxygen by controlling a supply pump for supplying oxygen into the housing. The method of claim 1, And detecting a carbon dioxide concentration around the catalyst layer, and further comprising a carbon dioxide detector configured to block the supply of the combustion gas to the gas injection unit when the carbon dioxide concentration reaches a predetermined amount or more. The method of claim 1, On the flow path toward the gas injection portion, And a check valve for controlling the combustion gas flowing in the flow path to flow only in the inner direction of the housing. The method of claim 1, And a conduction detection unit which senses the attitude of the housing and blocks the supply of the combustion gas to the gas injection unit when it is determined that the housing is conducted.

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