JP2007113908A - Portable heat transfer unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To drive a liquid circulator by using electromotive force generated by incorporating a thermoelectric conversion element in a heater in addition to heating liquid by a heat generator of a portable heat transfer unit. <P>SOLUTION: This portable heat transfer unit comprises a gas supply device B including a LPG cylinder, a gas/air mixer C equipped with a gas ejection nozzle and a Venturi tube working with the gas and having a mixing ratio regulation mechanism for starting, a combustor D for flame-burning a mixture gas thus generated in a combustion chamber 12 and incorporating a porous solid radiation converting body 17 for partially transforming combustion exhaust gas energy generated through combustion in the combustion chamber into radiation energy, a heat collector E arranged around the combustor, the thermoelectric conversion element T having a high temperature side closely kept into contact with the heat collector, and a low temperature side closely kept into contact with a liquid circulator F, and the liquid circulator F driven with power generated from the thermoelectric conversion element T, and the heat generated in the combustor D is transferred to an external heat load H through a liquid circuit G. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a portable heat transfer device for supplying heat to an external heat load such as a heater or a heating garment, which has an energy source and can be used outdoors where it is difficult to supply power and gas. Is.

  Conventionally, gas stoves, hoods, etc. are widely used as portable heaters used outdoors and the like. However, these things were inconvenient because they only warmed a part of the body and could not control the warmth. In addition, heating clothes, mats, and the like in which electric resistors that generate heat by electric energy from the battery are dispersed inside are put into practical use. However, these devices still have a high mass energy density of the battery and cannot supply energy necessary for heating for a sufficient time.

In order to solve these problems, clothes are known in which LPG is used as an energy source, LPG is burned by a catalyst, heat is taken out, and this is heated by air convection. (For example, refer to Patent Document 2.)
However, since it is difficult to carry heat to every corner only by air convection, there is also known a heating device in which a thermoelectric conversion element is incorporated in the combustion device and a circulation pump of the heat medium is driven by this electromotive force. (For example, refer to Patent Document 3.)
On the other hand, the present inventor has already proposed a portable heat transfer device that incorporates a heat-driven pump into a catalytic combustion device and circulates a heated liquid. (See Patent Document 1.)

By the way, the catalytic combustion of the combustor that is exclusively employed in the apparatus disclosed in the above-mentioned patent document is a tough combustion reaction that is not interrupted even if wind blows or the mixing ratio of fuel and air slightly changes. In addition, it has the feature that it can burn at a lower temperature than flame combustion. However, when the reaction is performed for a long time near the theoretical mixing ratio, there is a problem that the combustion temperature becomes too high for the catalyst and gradually deteriorates.
In order to prevent this, the reaction is carried out with the theoretical mixing ratio removed. However, if the fuel is removed in the direction of increasing the fuel concentration, the ignitability is improved and the handling becomes easier, but incomplete combustion results in wasteful use of fuel and odor. Exhaust gas will be discharged. On the other hand, if the fuel is removed in the direction of thinning, complete combustion occurs and fuel is not wasted, and the exhaust gas is also cleaned. However, there is a limit to air suction using a powerless Venturi tube to cover the relatively large amount of air. In particular, the catalyst must have a large contact area with the air-fuel mixture, which increases the resistance of the flow path and requires means such as introducing air by turning a fan with an external power source, such as a battery, in addition to the gas jet power. Therefore, the portable device has a complicated and large-scale sway.

Japanese Patent No. 3808127 JP-A-9-126423 Japanese Patent Laid-Open No. 2001-116265

Therefore, the present inventor adopts flame combustion instead of catalytic combustion as a combustion method, and gives consideration to keeping the flame in the combustor, enabling generation of high-temperature heat by flame combustion, and combustor The present invention has been completed by focusing on the fact that a thermoelectric conversion element is incorporated between the liquid circulation device and the liquid circulation device to generate electricity by the heat passing therethrough, thereby driving the liquid circulation device.

That is, the present invention is a gas / air mixing device that includes a gas supply device including an LPG cylinder, a gas injection nozzle and a venturi tube that work with the gas, and has a mixing ratio adjustment mechanism for starting. A combustor for burning an air-fuel mixture in a combustion chamber and incorporating a porous solid radiation converter for partially converting combustion exhaust energy generated by combustion in the combustion chamber into radiation energy; A heat collector that surrounds it, a thermoelectric conversion element in which the high temperature side is joined to the heat collection body and the low temperature side is joined to the liquid circulation device, and the liquid circulation device that is driven by the electric power generated by the thermoelectric conversion device The gist of the portable heat transfer device is that the heat generated in the combustor is transferred to an external heat load through a liquid circuit.

Further, the present invention is characterized in that a heat collector is provided so as to surround the combustor and to form a space between the combustor, and the present invention further includes an intake air in the gas / air mixing device. An air inlet windshield plate is provided near the outside of the air intake hole of the duct, and an air outlet air windbreak plate is provided near the exhaust gas exhaust hole located downstream of the combustion part. It is characterized by being placed apart from each other in the direction.
Furthermore, the present invention is characterized by incorporating a control device that is driven by the electric power of the thermoelectric conversion element and monitors the temperature of the collector, and acts on the gas supply device to shut off the gas when necessary. . The present invention is also characterized in that a power source for temporarily operating the control device is incorporated, and further comprising a state indicator for displaying the state of combustion controlled by the control device. It is a feature.

(Action)
The present invention is a combustor including a porous solid radiation converter for converting LPG into air-fuel mixture by a gas / air mixing device and partially converting the combustion exhaust energy generated by combustion in the combustion chamber into radiation energy. Although the flame is burned, the heat collector provided around the combustor is provided with a thermoelectric conversion element in which the high temperature side is joined to the heat collector and the low temperature side is joined to the liquid circulation device. The temperature of the liquid inside can be raised, and electric power can be generated by the thermoelectric conversion element, whereby the liquid circulation device can be driven to circulate the liquid against an external heat load.

FIG. 1 shows a first embodiment of the portable heat transfer device of the present invention, and its configuration is shown in a block diagram.
In the figure, a large rectangular frame indicates the entire main body of the portable heat transfer device A, and blocks in this indicate the respective devices constituting the present invention, and between each block, gas, air, liquid, etc. to be used are shown. They are connected by arrows indicating the flow of matter, heat, and electricity.

The gas supply device B of the portable heat transfer device A of the present invention comprises a gas cylinder and its attachment / detachment device, a gas opening / closing lever, a pressure regulator, a gas opening / closing valve, a gas pipe, and the like. C is supplied at a constant pressure. The gas / air mixing device C having a mixing ratio adjustment mechanism for starting is composed of a gas ejection nozzle, a venturi pipe, an intake duct, a throttle valve, a diffuser, and the like, and the supplied gas is blown into the venturi pipe from the nozzle. With the negative pressure generated, outside air is introduced into the ejector through the intake duct and throttle valve, and gas and air are sent to the diffuser. The diffuser mixes gas and air at a reduced speed. Yes.
The pressure of the air-fuel mixture thus obtained becomes slightly higher than the atmospheric pressure because the velocity energy is converted into pressure energy in the diffuser. This pressure difference becomes a driving force for discharging the air-fuel mixture through the combustor and the exhaust duct.

The next combustor D is constituted by a built-in porous solid radiation conversion body for partially converting the combustion exhaust energy generated by combustion in the combustion chamber into radiation energy. The combustor D is made of a material having high heat resistance and heat insulation, such as ceramics, and high heat ray radiation. A large number of holes are provided on the upper surface of the combustor and penetrate to the combustion chamber. The combustion chamber is partly or wholly configured to be flat, and the above-described hole is formed through the surface of the combustion chamber, which is a flame hole. A flame is formed slightly downstream of the flame hole, and a porous radiation converter is installed further downstream of the flame. Since it is configured in this manner, the high-temperature exhaust gas can promote combustion of the air-fuel mixture by returning a part of the energy to the inside of the combustion chamber, and can hold the flame in the combustion chamber. With the above configuration, in-vessel combustion with an atmospheric pressure burner that has been possible only with catalytic combustion until now is possible, and it is possible to continuously burn even a mixture that is much hotter and thinner than catalytic combustion. It became possible.
The porous solid radiation converter removes a part of the heat energy of the exhaust gas, so the temperature of the exhaust gas is slightly lowered, but the amount of that is returned to the inside of the combustor, so the combustor itself It gets hotter.
The heat collector E installed surrounding the combustor collects heat from the combustor D, and is generally made of a good heat conductor such as aluminum or copper.

Further, the thermoelectric conversion element T is arranged such that the high temperature side is joined to the heat collector E and the low temperature side is joined to a liquid circulation circuit G of the liquid circulation device F described later. The heat generated in the high-temperature combustor D is collected by the heat collector E, passes through the thermoelectric conversion element T, and is transmitted to the low-temperature liquid circulation device F. At this time, an electromotive force is generated in the thermoelectric conversion element T. In this case, it is preferable that the thermoelectric conversion elements T are bonded to each other on the other side.

  The liquid circulation device F includes a motor and the like. The liquid circulation device F acts on the liquid inside the liquid circulation circuit G to increase the temperature by using the heat that has passed through the thermoelectric conversion element T, and the electric power generated by the thermoelectric conversion element T is used. The motor is driven to activate the liquid circulation device F, and the liquid is transferred and circulated to the external heat load H.

  As described above, according to the present invention, LPG is burned by a combustor incorporating a porous solid radiation conversion body to generate stable heat in a high temperature state, and this heat is collected by the heat collection body E to perform thermoelectric conversion. Since it is a portable heat transfer device that generates electric power by the element T and raises the temperature of the liquid in the liquid circulation device F, the circulation engine of the liquid circulation device is driven by the generated electricity so that the liquid is externally supplied. There is an advantage that can be transmitted to the heat load. In addition, by adopting such a configuration, the heat energy can be used for liquid heating and generation of electromotive force, and the entire device can be miniaturized, with excellent handling characteristics and portability. ing.

In the first embodiment shown in FIG. 1, a safety function is incorporated using a part of the electric power generated by the thermoelectric conversion element T. That is, the temperature sensor J driven by the electric power of the thermoelectric conversion element T incorporates a control device I that monitors the temperature of the heat collector E and acts on the gas supply device B when necessary to shut off the gas. This control device I monitors the temperature of this portion with a temperature sensor J attached to the heat collector E, and when the temperature of the heat collector E becomes equal to or higher than the set temperature, it works on the gas supply device B to supply gas. Shut off. Further, even when the flame of the combustor D disappears due to some cause, the temperature of the heat collecting body E becomes equal to or lower than another set temperature, so that the gas is shut off.
By incorporating such a control device I, it is possible to prevent failures due to abnormal combustion and to ensure safety.

Further, in the figure, a status display device K such as a liquid crystal display connected to the control device I is provided, and the control status in the control device I and further the operating status of the portable heat transfer device A can be displayed. Therefore, the convenience of the heat transfer device can be improved, and furthermore, an abnormality display or the like can be displayed, which contributes to ensuring safety.

Moreover, in the said Example, although the power supply L by a battery is incorporated in the said control apparatus I, this is for supplying electricity to the control apparatus I temporarily, when starting a heat transfer apparatus, There is an effect that the thermoelectric conversion element T plays a role of linking until a sufficient electromotive force is generated.

FIG. 2 shows a second embodiment of the portable heat transfer device of the present invention. This apparatus basically has a gas supply apparatus B including an LPG cylinder, a gas / air mixing apparatus C having a nozzle and a venturi tube and having a mixing ratio adjusting mechanism for starting, as in the above embodiment. Composed of a combustor D containing a porous solid radiation conversion body for partially converting combustion exhaust energy generated by combustion into radiation energy, a heat collector E, a thermoelectric conversion element T, and a liquid circulation device F ing.
Among them, the gas supply device B includes a pressure regulator 9 having a knob 10 at the top, and a gas cylinder 8 filled with LPG and connected via a gas opening / closing lever 6 and a gas opening / closing valve 7. Further, a gas shutoff valve 24 and a button 25 for operating the gas shutoff valve 24 are provided in a passage between the outlet and a gas / air mixing device C described later.

On the other hand, the gas / air mixing device C is integrated with a combustor D, which will be described later, but includes an intake duct 1 provided with an intake hole 1 ′ and a gas ejection nozzle 2 provided through the intake duct 1. The venturi tube 3 and the diffuser 11 are connected to the downstream side, and the downstream end faces the inlet of the combustor. In the figure, 4 is a throttle valve for adjusting the air intake amount, and 5 is a lever for operating the throttle valve.

The operation of the gas supply device B and the gas / air mixing device C will be described. When the gas on / off lever 7 is operated to open the gas on / off valve 7, the LPG from the gas cylinder 8 is brought to a constant pressure by the pressure regulator 9. , And supplied to the gas ejection nozzle 2. The inner diameter of the gas supply nozzle 2, for example, a diameter 40 micrometers and a diameter of about 60 micrometers, the pressure applied to the nozzle suitably ^{2.9 × 10 4 Pa~19.6 × 10 4} Pa gauge圧位, pressure regulators The knob 10 is turned to adjust the pressure. The gas sucks air from the intake duct 1 with the ejector of the Venturi tube 3 and mixes with air while reducing the speed with the diffuser 11. The air-fuel mixture thus formed can be changed in the mixing ratio by operating the lever 5 and adjusting the opening of the throttle valve 4. A dark mixing ratio is necessary at the time of ignition, but a mixing ratio slightly lower than the theoretical mixing ratio is preferable during steady operation without incomplete combustion.
The mixing ratio adjusting mechanism according to the present invention is convenient and convenient by limiting the amount of air as in the above-described example. However, the mixing ratio can be increased by increasing the gas supply amount while maintaining the amount of air. Can do. In this case, another gas nozzle may be provided in the diffuser, connected by a pressure regulator and piping, and a gas on-off valve may be installed between them. In order to increase the mixing ratio, this valve may be opened. In this case, if the gas nozzle is installed in the downstream portion of the diffuser so as to be ejected in a direction substantially orthogonal to the flow, it will contribute to the mixing of gas and air without affecting the air suction.

The combustor includes a combustor D having a combustion chamber 12 and a heat collector E made of a good heat conductor such as aluminum surrounding the combustor D. The combustor D has a large number of spaced holes 15 that open to the flat surface 13 and function as flame holes 14 on the upstream side of the combustion chamber 12. The combustion chamber 12 has a very small internal volume of, for example, 10 cc or less. A spark plug 16 is provided that extends into the combustion chamber 12 for ignition.

  In addition, the combustor D is provided with a porous solid radiation converter 17 for partially converting the combustion exhaust energy generated by combustion in the combustion chamber into radiation energy at the outlet of the combustion chamber 12. As the solid radiation conversion body 17, for example, a wire net knitted from a heat-resistant metal wire having a diameter of about 0.1 mm to 0.3 mm is used.

First, for ignition, the throttle valve 4 is adjusted by the lever 5 to reduce the amount of air, so that the air-fuel mixture set to a dense eye is ejected from the numerous holes 15 of the combustor D into the combustion chamber 12. The air-fuel mixture ejected from the hole 15 creates a vortex near the exit due to the rapidly expanding flat surface 13. Next, the air-fuel mixture explodes by the spark of the spark plug 16, ignites the vortex, and the flame from the flame hole 14 is united to form one flame surface 18, and is stabilized near the flat surface 13. The wall temperature of the combustion chamber 12 rises due to combustion, and this heat warms the upper part of the flame hole 14, thereby preheating the air-fuel mixture, thereby increasing the combustion speed of the air-fuel mixture. On the other hand, the high-temperature exhaust gas by combustion has a thin wire mesh wire diameter that constitutes the porous solid radiation conversion body 17 described above. Radiates. Part of the radiant energy heats the upstream side, that is, the flame surface, and combustion is greatly accelerated. Further, the position of the porous solid radiation conversion body 17 is also important, and if it is too far from the flame surface, the effect of thermal radiation is reduced. It was. For this reason, it is appropriate to install the porous solid radiation conversion body 17 at a distance of about 5 mm to 15 mm from the flat surface 13 of the combustion chamber 12. In this way, the heat energy of the exhaust gas can be heated back to the flame in the form of radiation energy. Since the air-fuel mixture is heated strongly, the combustion speed gradually increases. This state needs to be maintained for a while. This is the heating time until the temperature of the porous solid radiation converter 17 and the combustor D rises and the combustion promoting function is exhibited. Thereafter, when the lever 5 is moved to increase the opening of the throttle valve 4 and air is introduced, the flow rate of the air-fuel mixture increases and the flow velocity in the combustion chamber 12 increases. If it is a normal combustion chamber, it will blow away to the flame surface downstream here. However, since the air-fuel mixture heated by preheating and heat reflux has a combustion speed corresponding to this flow rate, the air-fuel mixture is held in the combustion chamber in a stable state without blowing off, and flame holding is achieved. Since the air-fuel mixture is slightly air-excessive than the theoretical mixing ratio, the combustion is completely combusted, and a lot of heat energy is generated, and it turns to recirculation and preheating. Therefore, the stability of the flame increases. By increasing the combustion speed of the flame in this way, a large amount of gas can be burned in the small combustion chamber 12, so that it can be made smaller than the catalytic combustor of the same output, and as a combustor of a portable heat transfer device It can be said that it is optimal.

The heat generated in the combustion chamber 12 is collected by the heat collector E surrounding the combustor D and transmitted to the high temperature side of the thermoelectric conversion element T in close contact therewith. On the other hand, on the low temperature side of the thermoelectric conversion element T, a heat exhaust plate 19 made of a good thermal conductor such as copper or aluminum is brought into close contact, and a pipe 20 made of the same good thermal conductor penetrates the inside. The pipe 20 forms a circuit that passes through the exhaust heat plate 19, the external heat load H, the circulation pump 21, and returns to the exhaust heat plate 19, and the inside is filled with liquid. The heat is transferred from the high temperature side to the low temperature side of the thermoelectric conversion element T, and then transferred to the heat exhaust plate 19 that is in close contact therewith. At this time, heat passes through the thermoelectric conversion element T to generate thermoelectromotive force. By introducing this into the motor 23 through the lead wire 22, the circulation pump 21 connected to the motor 23 is rotated, and the pipe 20 Liquid can be circulated.
Here, the pipe 20 and the motor 23 that connect the exhaust heat plate 19 and the circulation pump 23 together constitute the liquid circulation device F. Thus, the heat generated in the combustor D is transmitted to the heat collector E, the thermoelectric conversion element T, the exhaust heat plate 19, the pipe 20, and the liquid, and transferred to the external heat load H.
In addition, it is preferable that the low temperature side of the photoelectric conversion element T is joined to the pipe 20 through the exhaust heat plate as described above because a large temperature gradient with respect to the high temperature side can be obtained. It is also possible to join to the circulation pump 21 in FIG.

The wire mesh used as the porous solid radiation conversion body 17 of the present invention is effective even more and becomes more effective when a plurality of sheets are stacked. In the case of a burner, it is necessary to decide on the balance with the amount of intake air. Moreover, the coarseness of the wire mesh is the same, and about 80 to 40 is preferable. Furthermore, by applying ceramic coating on the metal, it is effective for the wire mesh because it prevents wear due to heat and the ceramic has good radiation ability. Further, foamed ceramics may be used instead of the wire mesh.

  The thermoelectric conversion element T used in the present invention is an element that converts a part of heat energy into electric energy by utilizing a thermoelectromotive force, that is, a so-called Xebec effect generated on a joining surface of different metals by heat. When a loop is formed and one of the two joint surfaces is heated and the other is cooled, an electromotive force is generated at each joint surface and a current flows in the loop. For example, it is known that other metals are added to the tellurium / lead alloy as a metal to form P-type and N-type semiconductors, and a high thermoelectromotive force is generated at these joint surfaces. Are joined by plate-like electrodes to obtain a joint surface. Then, it is only necessary to use one of the plurality of joined surfaces connected in series with the high temperature side and the other surface at the low temperature side. In general, a thin ceramic is used to cover the joint surface for insulation.

Further, in this embodiment, a part of the electric power generated from the thermoelectric conversion element T is branched when being taken out by the lead wire 22 and supplied to the control device I. The control device I monitors the temperature of the heat collector E by the temperature sensor J and determines that it is overheated when the temperature exceeds the set value, and stops supplying electricity to the gas shutoff valve 24 provided in the gas supply device B. ing. The gas shut-off valve 24 is a valve that allows gas to pass only when energized by an electromagnet. When the button 25 is pushed in the direction of the arrow, the valve is attracted to the electromagnet and the valve is opened.
Next, when the flame goes out for some reason, it is judged that the temperature of the heat collecting body E is less than another set value when the fire goes off from the combustion state, and that the temperature goes down. The device I blocks the passage to the gas cutoff valve 24. In the case of an ignition failure, if the temperature of the heat collector E does not rise within a certain time (30 to 60 seconds) after the power switch 26 is turned on, it is determined that the ignition error has occurred, and Energization is also stopped.
The power supply L supplies electricity to the control device I when the switch 26 is turned on by a battery. The switch 26 is mechanically connected to the gas opening / closing lever 6 by a link mechanism, and the switch 26 is turned on when the gas opening / closing valve 7 is opened.
As described above, when the control device I, the status indicator K, and the power source L are incorporated, the failure due to the combustion abnormality can be prevented and the abnormality display can be performed, so that the safety of the apparatus can be improved. There is an effect that control and display can be stably performed.

FIG. 3 shows a part of the third embodiment of the present invention. For example, another configuration in which the configuration centering on the combustion portion of the second embodiment shown in FIG. 2 is replaced with the configuration of FIG. It is shown. In this embodiment, the heat collector E is made of a good heat conductor such as aluminum, and has a size and shape so as to completely surround the combustor D and to form a space with the combustor D. The combination of both is performed only by the heat insulating material seal 31 arranged so as to surround the upper part of the combustor D into which the air-fuel mixture enters. A large number of holes 34 and 35 constituting the upstream heat exchange section 32 and the downstream heat exchange section 33 are formed in the heat collector E, respectively. The upstream heat exchange unit 32 is coupled to the venturi tube 3 by a heat insulating seal 36.
In the combustion chamber 12, as in the embodiment of FIG. 2, a porous solid radiation conversion body 17 is installed at the outlet portion to partially convert combustion exhaust energy generated by combustion in the combustion chamber into radiation energy. Yes.

In the above embodiment, since the air insulation layer is formed between the combustor D and the heat collector E, the heat of the combustor D is collected exclusively by the downstream heat exchange unit 33 and the upstream heat exchange unit 32. In the combustion state, the heat generated in the combustion chamber 12 is not transferred to the heat collector E by heat transfer through the wall of the combustor D. Therefore, combustion becomes more accelerated because the combustor D itself has a higher temperature than the second embodiment of FIG. In addition, the preheated air-fuel mixture has two stages with the addition of the upstream heat exchanging section 32, and the flame in the combustion chamber 12 is more stable and less likely to blow off. Further, since the high-temperature exhaust gas is recovered by the downstream heat exchanging portion 33 and absorbed by the thermoelectric conversion element T, it becomes lower than the second embodiment, and as a result, a lot of heat is transferred to the thermoelectric conversion element T without waste. There is an advantage that it can be supplied and further stabilization of the flame can be achieved.
The combustor D used in the third embodiment is preferably formed of heat-resistant ceramics having excellent radiation ability, but a heat-resistant metal such as stainless steel can be used sufficiently.

FIG. 4 shows a fourth embodiment of the portable heat transfer device of the present invention. In this embodiment, the same configuration as that of the third embodiment is adopted as the combustion section, and the exhaust duct 40 for exhausting the exhaust gas emitted from the downstream heat exchange section 33 to the outside of the apparatus, and the exhaust holes 41 thereof. And an air vent exhaust windbreak plate 42 provided near the outside. On the other hand, an intake hole windbreak plate 43 is also provided near the outside of the intake hole 1 ′ of the intake duct 1. The intake hole 1 ′ and the exhaust hole 41 are installed apart from each other in the same direction of the apparatus.

This is so that when the wind is received from the outside, the same wind pressure is applied to the intake hole 1 ′ and the exhaust hole 41, so that the flame does not blow out. It has been put into practical use. In the case of a bathtub, the intake and exhaust holes are made as one body and heat exchange is performed to reduce exhaust loss. In this embodiment as well, the loss can be reduced by doing so. However, the combustion chamber 12 of the present invention has an internal volume that is only about one-hundredth of that in the case of a bathtub or the like, and has a high combustion chamber load (combustion chamber heat generation / combustion chamber volume cc). This increases the combustion chamber temperature and stabilizes the flame, but increases the combustion noise. This noise is divided into those toward the diffuser 11, the venturi tube 3, the intake hole 1 ′ and those toward the exhaust duct 40, and are released to the atmosphere and attenuated and extinguished. Here, if the intake hole 1 ′ and the exhaust hole 41 are close to each other, the intake hole and the exhaust hole are acoustically coupled to each other, so that a resonance that enhances a specific frequency is likely to occur, and the noise becomes pressure. The flame will be extinguished as it changes. In order to prevent this, it is necessary to make the distance between the combustion chamber, the exhaust hole, and the passage of the gas in the combustion chamber as short as possible and to install them at a certain distance from each other. If they must be in close proximity, a wall must be provided between them to block acoustic coupling. The windbreak plates 42 and 43 are preferably sized to completely cover the intake holes 1 ′ and the exhaust holes 41 so that the wind pressure is not directly applied to the intake holes 1 ′ and the exhaust holes 41. The windbreak plate is installed at a distance from the surfaces of the intake hole 1 ′ and the exhaust hole 41, and intake and exhaust are performed from that distance. In addition, it is more preferable that the windbreak plates 42 and 43 provided in the intake hole 1 ′ and the exhaust hole 41 are in the same plane as shown in the figure because there is no difference in wind pressure, but even if the plane positions are slightly shifted. I do not care.

Furthermore, in this embodiment, a heat exchanger 44 is installed in the exhaust duct 40 as shown in the figure. The liquid is rotated by the circulating pump 21 driven by the electromotive force of the thermoelectric conversion element T in order of the exhaust heat plate 19, the heat exchanger 44 and the external heat load H, and returns to the circulating pump 21. Thereby, a part of the heat energy of the exhaust gas is recovered by the heat exchanger 44 and supplied to the external heat load H, so that the thermal efficiency is improved.

It is a block diagram which shows the 1st Example of the portable heat transfer apparatus of this invention. It is a partially cut front view which shows the 2nd Example of the portable heat transfer apparatus of this invention. It is a fragmentary sectional view which shows the 3rd Example of the portable heat transfer apparatus of this invention. It is a partially cut front view which shows the 4th Example of the portable heat transfer apparatus of this invention.

Explanation of symbols

A portable heat transfer device main body B gas supply device C air suction / gas / air mixing device D combustor E heat collector F liquid circulation device G liquid circulation circuit H external heat load I control device J temperature sensor K status indicator L power supply T thermoelectric conversion element 1 intake duct 1 ′ intake hole 2 gas ejection nozzle 3 venturi pipe 4 throttle valve 5 lever 6 gas on / off lever 7 gas on / off valve 8 cylinder 9 pressure regulator 10 pressure regulator knob 11 diffuser 12 combustion chamber 13 flat surface 14 Flame hole 15 Hole 16 Spark plug 17 Porous solid radiation exchanger 18 Flame surface 19 Heat exhaust plate 20 Pipe 21 Circulation pump 22 Lead wire 23 Motor 24 Gas shut-off valve 25 Button 26 Switch 31 Heat insulation seal 32 Upstream heat exchange section 33 Downstream heat exchange section 34 hole 35 hole 36 heat insulation sea 40 Exhaust duct 41 Exhaust hole 42 Exhaust hole windbreak plate 43 Exhaust hole windbreak plate 44 Heat exchanger

Claims (7)

A gas / air mixing device including a gas supply device including an LPG cylinder, a gas jet nozzle and a venturi tube working with the gas, and having a mixing ratio adjusting mechanism for starting, and the generated air-fuel mixture in the combustion chamber And a combustor containing a porous solid radiation converter for partially converting the combustion exhaust energy generated by combustion in the combustion chamber into radiation energy. Composed of an installed heat collector, a thermoelectric conversion element in which the high temperature side is joined to the heat collection body and the low temperature side to the liquid circulation device, and the liquid circulation device driven by the electric power generated by the thermoelectric conversion device, and combustion A portable heat transfer device for transferring heat generated in a vessel to an external heat load through a liquid circuit. The portable heat transfer device according to claim 1, wherein a heat collector is provided so as to surround the combustor and to form a space between the combustor. In the gas / air mixing device, an intake hole windbreak plate is provided in the vicinity of the outside of the intake hole of the intake duct, and an exhaust hole windbreak plate is provided in the vicinity of the exhaust hole outside of the exhaust dust provided downstream of the combustion section. The portable heat transfer device according to claim 1 or 2, wherein the hole and the exhaust hole are spaced apart from each other in the same direction of the device.   4. The portable heat transfer device according to claim 3, wherein a part of a liquid circuit in the liquid circulation device is disposed in the exhaust duct and a heat exchange function is incorporated in the part.   5. A control device that incorporates a control device that is driven by the electric power of the thermoelectric conversion element, monitors the temperature of the heat collector, and acts on the gas supply device to shut off the gas when necessary. A portable heat transfer device according to claim 1.   The portable heat transfer device according to any one of claims 1 to 5, further comprising a power source for temporarily moving the control device.   The portable heat transfer device according to any one of claims 1 to 6, further comprising a state indicator that displays a state of combustion controlled by the control device.

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