JP2008115795A - Heat storage device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat storage device suitable for installation in a movable body such as an automobile, because of its reduced size and capability of constantly taking out a required amount of heat. <P>SOLUTION: The heat storage device comprises a first pressure vessel 2 in which a chemical compound X is sealed, a second pressure vessel 4 communicating with the first pressure vessel 2, a variable capacity chamber 6 and an atomizer 14. The chemical compound X causes separation reaction by obtaining heat and reacts with fluid such as the separated vapor or liquid to thereby generate heat. The first pressure vessel 2 includes a heat input portion 2a and a heat output portion 2b. The variable capacity chamber 6 is arranged within the second pressure vessel 4 while communicating with the first pressure vessel 2. The capacity of the variable capacity chamber 6 is increased as the fluid generated by dehydration of the chemical compound X moves. The atomizer 14 operates to return the fluid generated by the dehydration of the chemical compound X stored in the variable capacity chamber 6 into the first pressure vessel 2, thereby causing the compound X to react with the fluid. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heat storage device that is mounted on, for example, an automobile, takes heat from a high-temperature gas (heat source) discharged from an engine, and stores the heat for use in heating a vehicle. .

  Conventionally, as a heat storage device as described above, for example, an engine cooling water system has a heat radiating unit that radiates heat of cooling water and a heat storage unit that stores cooling water heated to a predetermined temperature or more. In order to reduce the heat dissipation capacity of the heat dissipation part at the time of recovery, the vehicle engine warm-up device with variable heat dissipation capacity of the heat dissipation part (see, for example, Patent Document 1), the cooling water circulation circuit, the heat accumulator, and the cooling water temperature There is an engine warm-up device provided with a bypass mechanism that operates in such a manner that the cooling water flows by bypassing the regenerator (see, for example, Patent Document 2).

In the above-described automobile engine warm-up device, when the engine is sufficiently warm, some or all of the engine coolant that has become hot is circulated in the heater core and used for heating. When the engine is at a low temperature, the circulation of the low-temperature engine coolant to the heater core is stopped in order to shorten the warm-up period.
JP 2004-1000066 A JP-A-5-202749

  However, in the engine warm-up device described above, since the heater core cannot be heated when the engine is at a low temperature, the heater core is heated by the electric heater. In this case, the electric power consumed by the electric heater is reduced. In consideration of this, the battery capacity must be increased, which may increase the weight and increase the cost.

  Therefore, the engine coolant that has become hot with the engine sufficiently warm is stored in the regenerator, and when the temperature of the engine coolant is low, such as when starting up, Attempts have been made to use cooling water as an auxiliary heater by supplying cooling water to the heater core, etc. However, in a system that stores this high temperature engine cooling water in a regenerator, There is a limit to the time that can be maintained at a high temperature, and there is a problem that a sufficient amount of heat cannot be obtained when necessary. In particular, it has been a conventional problem to solve these problems.

  The present invention has been made by paying attention to the above-described conventional problems, and after realizing a compact size, the necessary amount of heat can be always taken out. As a result, it can be mounted on a moving body such as an automobile. It aims at providing a suitable heat storage device.

The heat storage device according to the present invention obtains heat to cause a separation reaction and reacts with a separated fluid such as vapor or liquid to generate heat, that is, any one of alkali, alkaline earth metal, rare earth metal A first pressure vessel in which an oxide (for example, CaO, MgO, or Li ₂ O) is sealed and having a heat input portion and a heat output portion; a second pressure vessel in communication with the first pressure vessel; and The volume of the fluid that is located in the second pressure vessel and communicates with the first pressure vessel and is generated by the separation reaction of the compound increases as the pressure in the first pressure vessel moves. A variable volume chamber and a return supply means that operates to return the fluid generated by the separation reaction of the compound stored in the variable volume chamber into the first pressure vessel to react the compound with the fluid. It is characterized by Cage, and a means for solving the conventional problems described above the configuration.

  In the heat storage device according to the present invention, when heat is input through the heat input portion of the first pressure vessel, the temperature in the first pressure vessel enclosing the compound rises, and thus the first pressure vessel When the inside of the pressure vessel is heated, the compound undergoes a separation reaction, and a fluid such as a vapor or a liquid generated at this time moves to the variable volume chamber communicating with the first pressure vessel. The volume of the chamber increases, and the fluid filled in the variable volume chamber changes into a liquid by being left standing or cooled, that is, a heat storage state is obtained through an endothermic process.

  In the heat storage device in such a heat storage state, when the liquid fluid stored in the variable volume chamber is returned and supplied to the compound remaining in the first pressure vessel by operating the return supply means, the compound reacts. If the generated heat is output via the heat output part of the first pressure vessel, the heat release process is achieved.

  As described above, in the heat storage device according to the present invention, the basic endothermic process and exothermic process utilize a compound separation reaction (for example, dehydration reaction and hydration reaction). Unlike a system that stores heat, the heat storage state can be maintained for a long time.

  In addition, the heat storage device according to the present invention does not require a new heat source when taking out heat, and can suppress an increase in pressure in the pressure vessel. It is suitable for mounting on the body.

  Further, in the heat storage device according to the present invention, the return supply means is operated to supply the liquid fluid stored in the variable volume chamber back to the compound remaining in the first pressure vessel to cause a reaction, and this occurs. Heat can be output through a conduction pipe arranged in the heat output section of the first pressure vessel, for example, the heat output section. Energy can be output.

  In this way, since it is only necessary to arrange a conducting pipe such as a pipe in which a fluid such as engine cooling water has already flowed in the heat output section, the structure becomes simple as much, and in addition, a return supply means Since it is sufficient to use a power source only to operate the power, power saving can be achieved.

  On the other hand, in the automotive heat storage system using the heat storage device of the present invention, the branch pipe from the exhaust pipe of the automobile engine is arranged in the heat input part of the first pressure vessel, and the cooling part of the second pressure vessel. Arranged in the middle of the coolant conducting pipe extending from the radiator to the automobile engine, and arranged in the middle of the conducting pipe extending from the automobile engine to the heat generating part such as the heater core in the heat output portion of the first pressure vessel It is characterized by that.

  In the heat storage system for automobiles using the heat storage device of the present invention, as described above, when exhaust gas discharged from an automobile engine is used as a high-temperature heat source, the compound obtains heat from the exhaust gas and causes a separation reaction. The fluid such as steam or liquid generated in the tank is stored while suppressing the pressure rise, and the stored fluid is supplied back to the compound to cause a reaction, and the heat generated thereby is heated via a cooling path etc. to the heater core, transmission, etc. If it is led to the heat generation point, the vehicle interior can be quickly heated and the warm-up operation can be performed quickly, so that comfort and fuel efficiency can be improved.

  According to the present invention, since it has the above-described configuration, it is possible to take out a necessary amount of heat at all times after realizing compactness, and therefore, it is extremely suitable for mounting on a moving body such as an automobile. A very good effect is brought about.

  In the heat storage device of the present invention, the second pressure vessel may be provided with a cooling unit that cools the variable volume chamber, for example, a pipe through which a low-temperature fluid flows. In this case, the fluid generated by the separation reaction of the compound stored in the variable volume chamber is cooled by the cooling unit and changes to a liquid phase, so that the volume of the variable volume chamber and the first volume are reduced as much as the volume of the variable volume chamber is reduced. Each pressure rise of the pressure vessel of 2 can be suppressed, and as a result, it can contribute to the reduction in weight and size of the entire apparatus and can also contribute to cost reduction.

  Further, in the heat storage device of the present invention, the return supply means can be configured as a sprayer that communicates with the variable volume chamber, and in this case, the fluid in the variable volume chamber becomes a mist and is uniformly dispersed in the compound. Therefore, the reaction rate is accelerated compared to the case where the fluid is directly sprayed in a liquid state, and particularly when the average particle size of the sprayed droplets is fine, for example, when the average particle size is 5 μm or less. In this case, since the whole of the first pressure vessel is filled and filled, the reaction rate is further promoted.

  Furthermore, in the heat storage device of the present invention, the fluid flowing from the first pressure vessel to the variable volume chamber according to the internal pressure of the first pressure vessel between the first pressure vessel and the variable volume chamber communicating with each other. A configuration provided with a control valve that controls movement and prevents backflow can be employed.

  This control valve may be either one that opens and closes passively due to an increase in the internal pressure of the first pressure vessel, or one that actively opens and closes according to a signal from the control unit described later. The reaction speed and the reaction timing can be controlled by controlling the pressure by a signal from the control unit while preventing the reverse flow of the fluid moving from one pressure vessel to the variable volume chamber.

  Furthermore, in the heat storage device of the present invention, the internal pressure of the second pressure vessel that rises as the volume of the variable volume chamber increases is set between the first pressure vessel and the second pressure vessel that communicate with each other. A configuration in which a one-way valve that allows only movement of fluid from the second pressure vessel to the first pressure vessel when the value is exceeded can be employed.

  In this heat storage device, the compound undergoes a separation reaction by heat input through the heat input portion of the first pressure vessel, and a variable volume in which a fluid such as vapor or liquid generated thereby communicates with the first pressure vessel. Since the gas filled in the second pressure vessel flows into the first pressure vessel via the one-way valve when the volume exceeds the set value after moving to the chamber, the internal pressure of the second pressure vessel At the same time as the rise is suppressed, the movement of the fluid generated by the separation reaction of the compound to the variable volume chamber is promoted by the amount of gas in the second pressure vessel flowing into the first pressure vessel. Become.

  In addition, in the one-way valve, the movement of fluid from the first pressure vessel to the second pressure vessel is restricted, so that the amount of fluid in the first pressure vessel is reduced, and as a result, the entire system is Even if it is cooled, the pressurized state in the first pressure vessel is maintained. That is, since the liquid fluid stored in the variable volume chamber and the compound in the first pressure vessel can be reacted under pressure, this reaction is promoted.

  Here, when a compound undergoes a separation reaction with heat input through the heat input unit of the first pressure vessel to generate a fluid such as a vapor or a liquid, the internal pressure of the second pressure vessel increases. Since the volume of the variable volume chamber is increased, an increase in pressure can be suppressed. In other words, by monitoring the internal pressure of the second pressure vessel, it is possible to know the reaction state of the compound due to heat inflow through the heat input section, that is, from the start to the end of the separation reaction. It will be possible.

  On the other hand, when the compound undergoes a separation reaction with heat and a fluid such as vapor or liquid is generated, the temperatures of the first pressure vessel, the second pressure vessel, and the variable volume chamber all change. Even if it is made to monitor, the reaction state of the compound due to the heat inflow through the heat input section can be known. Therefore, in the heat storage device of the present invention, the first pressure vessel and the second pressure vessel Based on a signal from the internal pressure detection means and at least one of the first pressure vessel, the second pressure vessel, the temperature detection means of the variable volume chamber, and a signal from the detection means It is desirable to provide a control unit that controls the introduction of heat to the heat input unit of the pressure vessel.

  When the compound undergoes a separation reaction with heat, the temperatures of the first pressure vessel, the second pressure vessel, and the variable volume chamber all change, but the degree of change is more gradual than the change in pressure. Therefore, it is desirable to monitor the change in the internal pressure of the second pressure vessel.

  And as concrete control by the control part which controls introduction of heat to the heat input part, for example, in the case where the branch pipe branched from the pipe through which the high-temperature fluid flows through the direction control valve is arranged in the heat input part The direction control valve may be driven as necessary to stop the flow to the branch pipe.

  As described above, in the heat storage device of the present invention, when the detection unit of at least one of the internal pressure detection unit and the temperature detection unit and the control unit are provided, the end of the separation reaction is determined, In order to restrict heat from flowing into the first pressure vessel via the input unit, for example, after the reaction between the fluid returned from the variable volume chamber and the compound is completed, the compound is inadvertently separated again. It can be avoided that it happens, so that the necessary thermal energy can be taken out when necessary.

  Furthermore, in the heat storage device of the present invention, the control unit performs control so as to allow the derivation of heat from the heat output unit of the first pressure vessel only during the operation of the return supply means or in the time zone before and after the operation. can do.

  Specifically, the control unit determines that a slight time zone before or after the return supply means is operating is in a heat generation state due to the reaction between the fluid returned from the variable volume chamber and the compound. Control is performed so as to allow the derivation of heat through the heat output unit only during this time period, for example, to allow the derivation of heat through the low-temperature fluid flowing through the conduction pipe disposed in the heat output unit.

  When the above configuration is adopted, heat can be derived via the heat output section only during the reaction between the fluid returned from the variable volume chamber and the compound (at the time of heat release through the exothermic process), and during the compound separation reaction Since heat can be prevented from being derivated through the heat output portion (at the time of heat storage through the endothermic process), a decrease in the heat storage function can be suppressed to a small extent.

  Furthermore, in the heat storage device of the present invention, the first pressure vessel and the second pressure vessel can each be provided with a pressure regulating valve.

  In this case, when the internal pressure of the second pressure vessel reaches a preset value, the pressure regulating valve provided in the second pressure vessel opens to communicate with the outside and exhausts the gas in the second pressure vessel. Thus, an abnormal increase in the internal pressure of the second pressure vessel is suppressed, while the pressure regulating valve provided in the first pressure vessel opens and closes the internal pressure of both the pressure vessels and the variable volume chamber. If the pressure is controlled, both pressure vessels can be made compact and damage due to an increase in internal pressure can be avoided.

  Furthermore, in the heat storage device of the present invention, the variable volume chamber can be made of an elastic member such as polyurethane rubber, nitrile rubber, fluorine rubber, or silicone rubber. In this case, vapor, liquid, etc. The recovery of the fluid and the movement of the gas filled in the second pressure vessel to the first pressure vessel can be performed with a simple structure.

  EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to a following example.

  1 to 8 show an embodiment of the heat storage device of the present invention. As shown in FIG. 1, the heat storage device 1 is composed of a compound X (calcium hydroxide in this embodiment) that causes a separation reaction due to a temperature rise. ), A second pressure vessel 4 made of a stainless steel material and communicating with the pressure vessel 2 through the flow path 3, and the first pressure vessel 2 made of stainless steel. 2 and is made of a polyurethane rubber which is located in the second pressure vessel 4 and communicates with the first pressure vessel 2 via the control flow path 5 and whose volume changes as the pressure in the first pressure vessel 2 increases. A volume chamber 6 is provided.

  The first pressure vessel 2 includes a heat input part 2a and a heat output part 2b, and a heat source fluid conduction pipe 7 through which a high-temperature heat source fluid of gas or liquid flows is arranged in the heat input part 2a. At the same time, the fluid output pipe 8 through which a gas or liquid fluid flows is disposed in the heat output portion 2b.

  On the other hand, the second pressure vessel 4 includes a cooling unit 4a. The cooling unit 4a is provided with a cooling fluid conducting pipe 9 through which a cooling fluid flows, and is connected to the pressure vessel 2. Although heat is exchanged between the pipes 7 and 8 and between the pressure vessel 4 and the conducting pipe 9, the fluid itself is prevented from flowing.

  In this case, a control valve 11 that opens and closes in response to a signal from a control unit (not shown) is arranged in the control flow path 5 that communicates the first pressure vessel 2 and the variable volume chamber 6. In the flow path 3 that communicates the containers 2 and 4, the flow from the first pressure vessel 2 to the second pressure vessel 4 is restricted and only the flow from the second pressure vessel 4 to the first pressure vessel 2 is allowed to flow. An allowed one-way valve 12 is arranged.

  In addition, the first pressure vessel 2 is provided with a sprayer 14 that communicates with the variable volume chamber 6 through the conducting tube 13 and can spray droplets in the pressure vessel 2. 4, pressure sensors (not shown) are provided, respectively, and when the pressure detected by these pressure sensors exceeds a predetermined value, a pressure adjustment that operates to receive a signal from the control unit and communicate with the outside is received. Valves 15 and 16 are provided respectively.

  In the heat storage device 1 described above, when heat is input through the heat source fluid conducting tube 7 disposed in the heat input portion 2a of the first pressure vessel 2, the inside of the first pressure vessel 2 in which the compound X is enclosed is contained. When the temperature rises and the inside of the first pressure vessel 2 is heated in this way, the compound X undergoes a dehydration reaction as shown in FIG. It moves to the variable volume chamber 6 through the control valve 11 in the open state.

  When the volume of the variable volume chamber 6 increases due to the movement of the water vapor, the air in the second pressure vessel 4 is pushed by this and flows into the first pressure vessel 2 through the one-way valve 12 of the flow path 3. As a result, the increase in the internal pressure of the second pressure vessel 4 is suppressed, and at the same time, the separation reaction of the compound X is caused by the amount of the air in the second pressure vessel 4 flowing into the first pressure vessel 2. The movement of water vapor to the variable volume chamber 6 is promoted.

  Subsequently, when the dehydration reaction of the compound X proceeds, that is, when the generation of water vapor proceeds, the volume of the variable volume chamber 6 continues to expand as shown in FIG. 3, but at the same time, the second pressure vessel 4 Since the second pressure vessel 4 and the variable volume chamber 6 are cooled by the cooling water flowing through the cooling fluid conducting pipe 9 arranged in the cooling section 4a, the water vapor in the variable volume chamber 6 is cooled and gradually turned to water. Phase change.

  Then, the water vapor in the variable volume chamber 6 is cooled not only by the cooling water flowing through the cooling fluid conduit 9 but also by naturally leaving it, and finally after the dehydration reaction of the compound X is completed, As shown in FIG. 4, all the water vapor in the variable volume chamber 6 changes into water.

  That is, the heat absorption process is reached and the equilibrium is reached in the state shown in FIG. 4, and the heat storage state in which the thermal energy of the high-temperature fluid is stored is maintained, and this heat storage state can be maintained for a long time. In this heat storage state, the volume of the variable volume chamber 6 gradually decreases, and the pressure in the second pressure vessel 4 decreases accordingly, but the amount of water vapor in the first pressure vessel 2 is small. The pressurized state will be maintained.

  During the dehydration reaction of the compound X, when the internal pressure of the second pressure vessel 4 detected by the pressure sensor exceeds a preset value, the pressure regulating valve 16 communicating with the outside provided in the second pressure vessel 4 is Similarly, when the internal pressure of the first pressure vessel 2 detected by the pressure sensor exceeds a preset value, the pressure communicating with the outside provided in the first pressure vessel 2 is received. Since the regulating valve 15 is opened in response to a signal from the control unit, both internal pressures of the pressure vessels 2 and 4 are held at a predetermined pressure.

  That is, by providing the pressure sensors in both the pressure vessels 2 and 4, in addition to being able to recognize from the start to the end of the dehydration reaction, excessive pressure rise in the pressure vessels 2 and 4 and the variable volume chamber 6 Therefore, excessive expansion of the apparatus can be prevented, which can contribute to the compactness of the entire apparatus. The predetermined pressures in the pressure vessels 2 and 4 are appropriately set according to the amount of water vapor generated and the temperature of the steam and the size of the apparatus.

  In the heat storage device 1 in the heat storage state described above, the compound X that has completed the dehydration reaction is sealed in the first pressure vessel 2 in the state of calcium oxide in this embodiment, but the stored thermal energy. Is taken out as necessary, for example, when high temperature heat is required for warming up or heating at the time of starting the engine for automobiles at a low temperature, as shown in FIG. The water present in the variable volume chamber 6 is sprayed on the compound X in the calcium oxide state in the first pressure vessel 2 from the atomizer 14 communicating with the gas 6 through the conducting tube 13.

  Thus, when the water present in the variable volume chamber 6 is sprayed in the form of a mist, the compound X can be sprayed uniformly, and as described above, the pressure inside the first pressure vessel 2 is increased. Since the state is maintained, the hydration reaction of the calcium oxide compound X and water is promoted, and the fluid conduction pipe 8 in which the heat generated thereby is arranged in the heat output portion 2b of the first pressure vessel 2 is formed. As shown in FIG. 6, this low temperature fluid is rapidly heated and output to a desired heat generating part such as an engine, a drive component, or a heater core that is desired to be warmed up. During this time, if the pressure in the first pressure vessel 2 needs to be adjusted, the pressure is adjusted by opening the pressure adjusting valve 15 as appropriate.

  Subsequently, by spraying water into the first pressure vessel 2, the exothermic reaction is continued as shown in FIG. In other words, the heat is released through a heat generation process.

  Then, when the exothermic reaction of the compound X in the calcium oxide state is completed, the compound X returns to the original calcium hydroxide state, but at this point, as shown in FIG. A steady state is reached in which a high-temperature fluid flows through the fluid conducting pipe 8.

  As described above, in this heat storage device 1, since the heat storage state → the heat release state → the steady state is performed in one system using the separation reaction of the compound X, it is possible to realize the compactness, Since the power source is mainly used only for driving the sprayer 14, power saving can be achieved.

  Next, an automotive heat storage system using the above-described heat storage device 1 will be described.

  This automobile heat storage system is constructed by incorporating the heat storage device 1 into an automobile engine cooling system. This automobile engine cooling system includes two automobile engines 21 and two radiators 22 as shown in FIG. A coolant circulation path 23 formed by connecting the coolant conduction pipes 9 of the coolant, a part of the coolant discharged from the automobile engine 21 is directed from the direction control valve 24 via the heater core 25. The sub-circulation path 23 </ b> A returns to the coolant circulation path 23 via the control valve 26.

  In this case, the branch pipe 7A from the exhaust pipe 7 of the automobile engine 21 is disposed in a penetrating state with respect to the first pressure vessel 2 of the heat storage device 1 as a heat source fluid conducting tube, and the second pressure vessel 4 On the other hand, an intermediate portion of the coolant conducting pipe 9 extending from the radiator 22 to the automobile engine 2 is disposed in a penetrating state, and the direction control valve 24 from the automobile engine 21 to the first pressure vessel 2 is disposed. A part of the coolant discharged from the automobile engine 21 is also sent to the heater core 25 through the conduction pipe 8 by arranging the middle part of the conduction pipe 8 extending to the heater core 25 through the through hole. To be able to.

  In this vehicle heat storage system, when heat is input through the branch pipe 7A from the exhaust pipe 7 that penetrates the first pressure vessel 2, as shown in FIG. The temperature in the enclosed first pressure vessel 2 rises and the compound X undergoes a dehydration reaction, and water vapor generated at this time moves to the variable volume chamber 6 in the second pressure vessel 4. The exhaust gas flowing through the branch pipe 7A is heated outside the vehicle after heating the compound X.

  At the same time as the generation of water vapor due to the dehydration reaction of the compound X proceeds, the water vapor in the variable volume chamber 6 is cooled by the cooling water from the radiator 22 flowing through the cooling fluid conducting pipe 9 passing through the second pressure vessel 4. Thus, the phase changes to water, that is, the heat storage state in which the heat energy of the exhaust gas, which is a high-temperature fluid, is preserved through an endothermic process, and this heat storage state can be maintained for a long time. The cooling water flowing through the cooling fluid conducting pipe 9 cools the water vapor in the variable volume chamber 6 and then returns to the automobile engine 21 again.

  On the other hand, in the automobile heat storage system in which the heat storage device 1 is in the heat storage state, when the heat for heating is required at the start of the automobile engine 21 at a low temperature, as shown in FIG. When water existing in the inside is sprayed on the calcium oxide state compound X in the first pressure vessel 2, the calcium oxide state compound X and water undergo a hydration reaction and penetrate the first pressure vessel 2. The cooling water flowing through the conducting tube 8 is rapidly heated by the heat generated by the hydration reaction and sent to the heater core 25.

  The cooling water heated via the heater core 25 becomes low temperature by heat exchange with the air in the heater core 25, and then sent to the radiator 22 via the direction control valve 26 and the cooling fluid conducting pipe 9 to be air-cooled. The cooling water cooled by the radiator 22 passes through the second pressure vessel 4 through the cooling fluid conducting pipe 9 extending to the engine 21 and is returned to the engine 21 again.

  Therefore, in this automotive heat storage system, the heater core 25 can be quickly heated without using the battery B even if the engine 21 is cooled and the cooling water is at a low temperature. In this case, since it is not necessary to increase the number of special flow paths and pumps, it is extremely suitable for automobiles.

It is composition explanatory drawing which shows one Example of the thermal storage apparatus of this invention. Example 1 It is state explanatory drawing in the dehydration reaction initial stage of the thermal storage apparatus shown in FIG. Example 1 It is a state explanatory view in the middle phase of the dehydration reaction of the heat storage device shown in FIG. Example 1 FIG. 2 is a state explanatory diagram after the dehydration reaction of the heat storage device illustrated in FIG. 1. Example 1 It is a state explanatory view in the initial stage of the hydration reaction of the heat storage device shown in FIG. Example 1 It is a state explanatory view in the middle stage of the hydration reaction of the heat storage device shown in FIG. Example 1 It is a state explanatory view in the last stage of hydration reaction of the heat storage apparatus shown in FIG. Example 1 It is a state explanatory drawing after the hydration reaction of the heat storage apparatus shown in FIG. Example 1 It is a state explanatory view at the time of dehydration reaction which shows one Example of the thermal storage system for motor vehicles which integrated the thermal storage apparatus in FIG. 1 in the cooling system of the engine for motor vehicles. (Example 2) It is a state explanatory view at the time of the hydration reaction of the automotive heat storage system in FIG. (Example 2)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat storage apparatus 2 1st pressure vessel 2a Heat input part 2b Heat output part 4 2nd pressure vessel 4a Cooling part 6 Variable volume chamber 7 Exhaust pipe (heat source fluid conduction pipe)
7A Branch pipe 8 Fluid conducting pipe 9 Cooling fluid conducting pipe 11 Control valve 12 One-way valve 14 Nebulizer (return supply means)
15, 16 Pressure regulating valve 21 Automotive engine 22 Radiator 25 Heater core X Compound

Claims (11)

A first pressure vessel having a heat input part and a heat output part enclosing a compound that generates heat and causes a separation reaction and reacts with a separated fluid such as vapor or liquid and generates heat, and the first pressure container A second pressure vessel communicating with the first pressure vessel, and a fluid which is located in the second pressure vessel and communicates with the first pressure vessel and is generated by the separation reaction of the compound increases in pressure in the first pressure vessel. The variable volume chamber whose volume increases as it moves due to the fluid, and the fluid generated by the separation reaction of the compound stored in the variable volume chamber is operated to return the fluid into the first pressure vessel. The heat storage device is characterized by comprising return supply means for reacting with. The heat storage device according to claim 1, wherein a cooling unit for cooling the variable volume chamber is provided in the second pressure vessel. The heat storage device according to claim 1 or 2, wherein the return supply means is a sprayer communicating with the variable volume chamber. The movement of fluid such as vapor or liquid from the first pressure vessel to the variable volume chamber is controlled between the first pressure vessel and the variable volume chamber communicating with each other according to the internal pressure of the first pressure vessel. And the heat storage apparatus as described in any one of Claims 1-3 which provided the control valve which blocks | prevents a backflow. Between the first pressure vessel and the second pressure vessel that communicate with each other, the second pressure is increased when the internal pressure of the second pressure vessel that rises as the volume of the variable volume chamber increases exceeds the set value. The heat storage device according to any one of claims 1 to 4, further comprising a one-way valve that allows only fluid to move from the container to the first pressure container. Detection means of at least one of the internal pressure detection means of the first pressure vessel and the second pressure vessel, and the temperature detection means of the first pressure vessel, the second pressure vessel, and the variable volume chamber; The heat storage device according to any one of claims 1 to 5, further comprising a control unit that controls introduction of heat to the heat input unit of the first pressure vessel based on a signal from the detection unit. The heat storage device according to claim 6, wherein the control unit performs control so as to allow the derivation of heat from the heat output unit of the first pressure vessel only during a time period before and after the operation of the return supply unit. The heat storage device according to any one of claims 1 to 7, wherein a pressure regulating valve is provided in each of the first pressure vessel and the second pressure vessel. The heat storage device according to any one of claims 1 to 8, wherein the variable volume chamber is made of an elastic member such as polyurethane rubber, nitrile rubber, fluorine rubber, or silicone rubber. The heat storage device according to any one of claims 1 to 9, wherein the compound sealed in the first pressure vessel is an oxide of any one of alkali, alkaline earth metal, and rare earth metal. The heat storage system for vehicles using the heat storage device according to any one of claims 1 to 10, wherein a branch pipe from an exhaust pipe of an automobile engine is arranged at a heat input portion of the first pressure vessel, and a second pressure vessel In the cooling part, a part in the middle of the coolant conduction pipe extending from the radiator to the automobile engine is arranged, and the part in the middle of the conduction pipe extending from the automobile engine to the heat generating part such as the heater core is the heat output part of the first pressure vessel A heat storage system for automobiles, characterized by being arranged in

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