JP5770608B2 - Chemical heat storage system for vehicle and air conditioning system for vehicle including the same - Google Patents

Description

  The present invention relates to a vehicle chemical heat storage system and a vehicle air conditioning system including the same.

  2. Description of the Related Art A vehicle air conditioner that includes a regenerator on the downstream side of an evaporator is known for a vehicle that automatically stops the engine when the vehicle stops, such as waiting for a signal (for example, Patent Document 1). In the vehicle air conditioner disclosed in Patent Document 2, the temperature rise in the passenger compartment is suppressed when the engine is automatically stopped by using the latent heat of dissolution of the cool storage material in the cool storage.

  On the other hand, there is known a vehicle chemical heat storage system including a reactor incorporating a chemical heat storage material that dissipates heat by a hydration reaction, and an evaporator that supplies water vapor to the reactor for hydration reaction of the chemical heat storage material. (For example, Patent Document 2).

JP 2003-80933 A JP 2009-264613 A

  By the way, it is conceivable to use the vehicle chemical heat storage system disclosed in Patent Document 2 as a heat source of the vehicle air conditioner.

  It is an object of the present invention to obtain a vehicle chemical heat storage system that can be used as a heat source for a vehicle air conditioning system, and a vehicle air conditioning system including the same.

The chemical heat storage system for a vehicle according to claim 1 is obtained by a storage unit that stores water, an evaporation unit that generates water vapor by evaporating water supplied from the storage unit, and an energy supply from the vehicle. It has a chemical heat storage material that dehydrates with heat to store heat and hydrates with water vapor generated in the evaporation section to dissipate heat, and circulates a coolant for cooling the engine between the engine and the heater core. A reaction part which is provided so as to be able to exchange heat with the coolant flowing through the heater core circulation path, and which releases heat generated by the hydration reaction by heat exchange with the coolant, and from the reaction part by the dehydration reaction the resulting water vapor is condensed, e Bei and a condensing unit back to the reservoir, the reservoir is to circulate the coolant between the cooling liquid or the engine and the radiator flow from the reaction unit to the heater core Raj The cooling fluid flowing in the upstream side of the radiator and the heat exchangeably provided in the chromatography data circulation path, thereby heating the water stored in the accumulating unit by heat exchange with the cooling liquid.

  According to the vehicle chemical heat storage system according to claim 1, the chemical heat storage material in the reaction section stores the heat by dehydration reaction by the heat supply from the vehicle. The water vapor generated by this dehydration reaction is condensed by the condensing unit and stored in the storage unit. The water (condensate) stored in the storage unit is supplied to the evaporation unit, and water vapor is generated by the evaporation unit.

  On the other hand, the chemical heat storage material generates heat through a hydration reaction with water vapor generated in the evaporation section. The heat generated by this hydration reaction is released by heat exchange between the coolant for cooling the engine circulating in the heater core circuit and the chemical heat storage material. That is, the coolant is heated by heat exchange between the chemical heat storage material and the coolant. The heated coolant is supplied to the heater core via the heater core circulation path.

Thus, in the present invention, by using the heat generated by the hydration reaction of the chemical heat storage material in the reaction section as the heat source of the heater core, for example, the heater core can be heated even when the engine is stopped or at a low temperature. it can.
Moreover, the water stored in the reservoir is heated by heat exchange between the coolant flowing from the reaction unit to the heater core or the coolant flowing upstream of the radiator in the radiator circulation path and the reservoir. The water heated in this way is supplied to the evaporation section. As a result, a decrease in the temperature of the evaporation part due to latent heat of evaporation is suppressed, and as a result, a decrease in water vapor generation efficiency is suppressed. Therefore, the hydration reaction of the chemical heat storage material is maintained over a long period of time compared with the configuration in which the coolant flowing from the reaction section to the heater core or the coolant flowing upstream of the radiator in the circulation path for the radiator and the storage section do not exchange heat. Therefore, the heated coolant can be supplied to the heater core for a long time.

  The chemical heat storage system for a vehicle according to claim 2 is the chemical heat storage system for a vehicle according to claim 1, wherein the evaporation section is provided so as to be able to exchange heat with a coolant flowing from the reaction section to the heater core, The energy of the latent heat of vaporization generated with the generation of the water vapor is supplied by heat exchange with the cooling liquid.

  According to the vehicle chemical heat storage system of the second aspect, the evaporation unit is heated by heat exchange between the cooling liquid flowing from the reaction unit to the heater core and the evaporation unit, and latent heat of evaporation is obtained with the generation of water vapor in the evaporation unit.

  Here, when water vapor is generated in the evaporation section, the evaporation section is gradually cooled by latent heat of evaporation, and the generation efficiency of water vapor may be reduced. On the other hand, in the present invention, as described above, the evaporation section is heated by heat exchange between the cooling liquid flowing from the reaction section to the heater core and the evaporation section, and energy for the latent heat of evaporation generated along with the generation of water vapor is supplied. . Thereby, as a result of suppressing the temperature fall of an evaporation part, the fall of the production | generation efficiency of water vapor | steam is suppressed. Therefore, compared with the configuration in which the coolant flowing in the upstream side of the radiator in the radiator circulation path and the evaporation section do not exchange heat, the hydration reaction of the chemical heat storage material can be maintained for a long period of time. The coolant can be supplied to the heater core for a long time.

The vehicle air conditioning system according to claim 3 circulates the coolant between the engine and the radiator, and a heater core circulation path for circulating a coolant for cooling the engine between the engine and the heater core. Heat generated by the hydration reaction in the reaction section is released by heat exchange between the circulation path for the radiator, the coolant flowing in the heater core circulation path, and the reaction section, and the heater core is passed through the coolant. The vehicle chemical heat storage system according to claim 1 or 2 is provided.

According to the vehicle air conditioning system according to claim 3 , by using the heat generated by the hydration reaction of the chemical heat storage material in the reaction section as the heat source of the heater core, for example, even if the engine is in a stopped state or a low temperature state, The heater core can be heated.

  As described above, the present invention can use a vehicle chemical heat storage system as a heat source of a vehicle air conditioning system.

1 is a system configuration diagram showing a schematic overall configuration of a vehicle air conditioning system according to a first embodiment of the present invention. 1 is a block diagram showing a heat storage ECU and an air conditioning ECU constituting the vehicle air conditioning system according to the first embodiment of the present invention. It is a system configuration figure explaining operation of heat storage mode of the chemical heat storage system for vehicles concerning a 1st embodiment of the present invention. It is a system block diagram explaining operation | movement of the thermal radiation mode of the chemical thermal storage system for vehicles which concerns on 1st Embodiment of this invention, and the heating mode of an air conditioning system for vehicles. It is a system configuration figure explaining operation of the heat dissipation mode of the chemical thermal storage system for vehicles concerning a 1st embodiment of the present invention. It is a system block diagram which shows the schematic whole structure of the vehicle air conditioning system which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the thermal storage ECU and air conditioning ECU which comprise the vehicle air conditioning system which concerns on 2nd Embodiment of this invention. It is a system block diagram explaining operation | movement of the thermal radiation mode of the chemical thermal storage system for vehicles which concerns on 2nd Embodiment of this invention, and the air_conditioning | cooling mode of a vehicle air conditioning system. It is a system block diagram which shows the schematic whole structure of the vehicle air conditioning system which concerns on 3rd Embodiment of this invention. It is a block diagram which shows the thermal storage ECU and air conditioning ECU which comprise the vehicle air conditioning system which concerns on 3rd Embodiment of this invention. It is a system block diagram explaining operation | movement of the thermal radiation mode of the chemical heat storage system for vehicles which concerns on 3rd Embodiment of this invention, and the heating mode of an air conditioning system for vehicles. It is a system block diagram explaining operation | movement of the thermal radiation mode of the chemical heat storage system for vehicles which concerns on 3rd Embodiment of this invention, and the air_conditioning | cooling mode of a vehicle air conditioning system.

  First, a first embodiment of the present invention will be described.

  FIG. 1 schematically shows a system configuration of a vehicle air-conditioning system 10 to which the vehicle chemical heat storage system 60 according to the first embodiment is applied. The vehicle air-conditioning system 10 includes a radiator 12 and a radiator circulation path 16 that circulates engine coolant as a coolant between the radiator 12 and an engine 14 as an internal combustion engine of the vehicle. The radiator circulation path 16 is provided with a water pump 18, and by operating the water pump 18, the engine coolant is circulated through the radiator circulation path 16.

  The radiator 12 is provided in the front part of the vehicle, and is cooled by receiving the traveling wind of the vehicle. The radiator 12 and the engine cooling water exchange heat so that the engine cooling water is cooled. Further, the engine 14 is cooled by supplying the cooled engine cooling water to the engine 14.

  A thermostat 20 is provided on the downstream side of the radiator 12 in the radiator circulation path 16. The thermostat 20 is configured to open and close the radiator circulation path 16 according to the temperature of the engine coolant. That is, the radiator circulation path 16 is opened when the temperature of the engine cooling water exceeds a predetermined value, while the radiator circulation path 16 is closed when the temperature of the engine cooling water becomes lower than the predetermined value. Yes.

  The radiator circulation path 16 is provided with a radiator bypass line 16 </ b> A that bypasses the radiator 12 and the thermostat 20. The radiator bypass line 16A allows the engine coolant to circulate through the radiator circulation path 16 even when the thermostat 20 closes the radiator circulation path 16.

  The vehicle air conditioning system 10 includes a heater core 22 and a heater core circulation path 24 that circulates refrigerant between the heater core 22 and the engine 14. The heater core circulation path 24 is connected to the radiator circulation path 16 so as to bypass the radiator 12, and the engine cooling water is circulated by operating the water pump 18. The radiator circulation path 16 and the heater core circulation path 24 are provided with valves 26, 28, and 30 for opening and closing the respective flow paths. The heater core circulation path 24 is provided with a heat release line 72 described later.

  The heater core 22 is a heating heat exchanger that uses engine coolant as a heat source, and is provided in an air conditioning case 32 that constitutes the vehicle air conditioner 30. An air inlet 34 through which outside air or inside air flows is formed at one end side of the air conditioning case 32. An air conditioning blower 36 that sucks outside air or inside air into the air conditioning case 32 and sends the sucked outside air or inside air to the downstream side as air conditioning air is provided downstream of the air inlet 34 in the air conditioning case 32. Yes. An evaporator 38 for cooling the air-conditioning air sent from the air-conditioning blower 36 is provided on the downstream side of the air-conditioning blower 36. The evaporator 38 forms a refrigeration cycle (not shown), and is configured to cool the air-conditioning air by the latent heat of vaporization of the refrigerant generated by heat exchange with the air-conditioning air when the refrigeration cycle is operated.

  A heater core 22 for heating air for air conditioning is provided on the downstream side of the evaporator 38 in the air conditioning case 32. Engine cooling water heated by the engine 14 is supplied to the heater core 22 via the heater core circulation path 24, and heat exchange is performed between the heater core 22 and the air-conditioning air. Is to be heated.

  A heater core bypass passage 40 that bypasses the heater core 22 is formed above the heater core 22 in the air conditioning case 32. The heater core bypass channel 40 is provided with an air mix damper 42 for opening and closing the heater core bypass channel 40. The air mix damper 42 is rotatably supported by the air conditioning case 32, and the air mix damper 42 is rotated by a motor (not shown) to adjust the opening degree of the heater core bypass flow path 40, thereby passing through the heater core 22. The flow rate ratio between the heated air-conditioning air and the low-temperature air-conditioning air that has passed through the heater core bypass passage 40 is adjusted.

  A defroster outlet 44, a face outlet 46, and a foot outlet 48 are formed on the downstream side of the heater core 22 and the air mix damper 42 in the air conditioning case 32. The defroster outlet 44, the face outlet 46, and the foot outlet 48 can be opened and closed by two outlet switching dampers 50A and 50B that are rotatably supported by the air conditioning case 32. By appropriately opening and closing the defroster outlet 44, the face outlet 46, and the foot outlet 48 by the outlet switching dampers 50A and 50B, the temperature-adjusted air-conditioning air is supplied to the desired defroster outlet 44 and the face outlet. 46 and the foot outlet 48 are blown out into the passenger compartment.

  Next, the chemical heat storage system for vehicles according to the present embodiment will be described.

  The vehicle chemical heat storage system 60 includes a reactor 62 as a reaction unit, a condenser 80 as a condensing unit, an evaporator 90 as an evaporating unit, and a water tank 100 as a storage unit. Is used as a heat source (heat source for heating) of the heater core 22 in the vehicle air conditioning system 10.

  A reaction channel 64 </ b> A filled with a chemical heat storage material 66 is provided inside the container 64 constituting the reactor 62. The chemical heat storage material 66 is configured to store heat (heat absorption) with dehydration and to dissipate heat (heat generation) with hydration (restoration to calcium hydroxide).

In the present embodiment, as an example, the chemical heat storage material 66 is configured to include calcium hydroxide (Ca (OH) ₂ ), which is one of alkaline earth metal hydroxides. Accordingly, the reaction flow path 64A of the reactor 62 is configured to reversibly repeat heat storage and heat release by the following reaction.
Ca (OH) ₂ Ｃａ CaO + H ₂ O

When the heat storage amount and the heat generation amount Q are shown together in this equation,
Ca (OH) ₂ + Q → CaO + H ₂ O
CaO + H ₂ O → Ca (OH) ₂ + Q
It becomes. The heat storage capacity per kg of this chemical heat storage material (Ca (OH) ₂ ) is about 1.86 [MJ / kg-Ca (OH) ₂ ]. The chemical heat storage material 66 is not limited to calcium hydroxide, and a material that reversibly repeats the same heat storage and heat dissipation can be used.

  Further, in the container 64 of the reactor 62, a heat medium flow path 64B for supplying heat to the chemical heat storage material 66, and a refrigerant flow path 64C for releasing the heat radiated by the chemical heat storage material 66 to the outside. Is provided. The heat medium flow path 64B and the refrigerant flow path 64C are configured so that the heat medium and the refrigerant (engine cooling water) flowing inside each of them can exchange heat with the chemical heat storage material 66 in the reaction flow path 64A. 64A is adjacent (not shown).

  An exhaust line 68 connected to the engine 14 is connected to the heat medium passage 64B, and the chemical heat storage material 66 is heated by the high-temperature exhaust gas supplied from the exhaust line 68. . That is, the chemical heat storage material 66 is heated by receiving heat supply from the vehicle to which the vehicle air conditioning system 10 according to the present embodiment is applied. The exhaust line 68 is provided with a valve 70 for opening and closing the flow path. Instead of the exhaust gas, air heated by an electric heater or the like that operates by receiving power supplied from a battery mounted on the vehicle may be used.

  On the other hand, a heat release line 72 for transferring the heat generated by the chemical heat storage material 66 to the heater core 22 is connected to the refrigerant flow path 64C. The heat release line 72 is a bypass line for circulating engine cooling water between the refrigerant flow path 64 </ b> C of the reactor 62 and the heater core 22, and is connected to the heater core circulation path 24. The heat release line 72 is provided with a valve 74 that opens and closes the flow path, and a water pump 76 that pumps engine coolant to the heater core 22. The engine cooling water supplied to the refrigerant flow path 64C of the reactor 62 via the heat release line 72 and the chemical heat storage material 66 in the reaction flow path 64A exchange heat, whereby the hydration reaction of the chemical heat storage material 66 is performed. The heat generated along with this is released to the engine cooling water, and the engine cooling water is heated.

  A condenser 80 is connected to the reaction flow path 64 </ b> A of the reactor 62 via a water vapor discharge line 86. The container 82 constituting the condenser 80 is provided with a condensing chamber 82A for condensing the water vapor discharged from the reaction flow path 64A of the reactor 62 through the water vapor discharge line 86. Further, the condenser 80 is provided with a blower 84 for cooling the condensation chamber 82A. The blower 84 cools the water vapor that has flowed into the condensing chamber 82A, so that the water vapor is condensed.

  Further, an evaporator 90 is connected to the reaction flow path 64 </ b> A of the reactor 62 via a water vapor supply line 88. An evaporation chamber 92 </ b> A for generating water vapor to be supplied to the reaction flow path 64 </ b> A of the reactor 62 is provided in the container 92 constituting the evaporator 90. Water is supplied to the evaporation chamber 92A from a water tank 100, which will be described later, through a water supply line 104, and steam is generated by a difference in vapor pressure with the reaction flow path 64A of the reactor 62. It is configured. In addition, it is also possible to provide a heat medium flow path capable of exchanging heat with water in the evaporation chamber 92A in the container 92 of the evaporator 90 and supply the heat medium to the heat medium flow path to generate water vapor.

  The water vapor discharge line 86 and the water vapor supply line 88 are connected to each other at the three-way valve 94, and are connected to the reaction flow path 64 </ b> A of the reactor 62 through the water vapor discharge supply line 96 connected to the three-way valve 94. . That is, the water vapor discharge line 86 and the water vapor discharge line 86 share the water vapor discharge supply line 96. By the operation of the three-way valve 94, the state is switched between a state in which the water vapor discharge supply line 96 and the water vapor discharge line 86 are connected and a state in which the water vapor discharge supply line 96 and the water vapor supply line 88 are connected. Yes.

  The three-way valve 94 is configured to be capable of independently opening and closing each of the water vapor discharge line 86, the water vapor supply line 88, and the water vapor discharge supply line 96, and closes the water vapor discharge line 86 and also supplies the water vapor discharge supply line. By adjusting the opening degree of the water vapor discharge line 86 in a state where 96 is opened, the flow rate of water vapor supplied from the water vapor supply line 88 to the reaction flow path 64A of the reactor 62 can be increased or decreased. Thereby, the amount of heat release accompanying the hydration reaction of the chemical heat storage material 66 can be adjusted.

  The reaction flow path 64A of the reactor 62, the condensation chamber 82A of the condenser 80, the evaporation chamber 92A of the evaporator 90, the water vapor discharge line 86, the water vapor supply line 88, the water vapor discharge supply line 96, and the three-way valve 94 are connected to each other. These parts are connected in an airtight manner, and these internal spaces are evacuated. Thereby, the water in the evaporation chamber 92A of the evaporator 90 is easily evaporated.

  A water tank 100 is connected to the bottom of the container 82 of the condenser 80 via a condensed water recovery line 98. The container 102 constituting the water tank 100 is provided with a storage chamber 102 </ b> A for storing the water condensed by the condenser 80. An evaporation chamber 92A of an evaporator 90 is connected to the storage chamber 102A via a water supply line 104. The water supply line 104 is provided with a valve 108 for opening and closing the flow path, and a water pump 106 for pumping the condensed water stored in the storage chamber 102A of the water tank 100 to the evaporation chamber 92A of the evaporator 90. Yes.

  The connecting portion between the condensed water recovery line 98 and the water tank 100 and the connecting portion between the water supply line 104 and the water tank 100 are set below the gravitational direction from the lowest design liquid level in the water tank 100. ing. The water tank 100 may be integrated with either the container 82 of the condenser 80 or the container 92 of the evaporator 90.

  The container 102 of the water tank 100 is provided with a heat medium flow path 102B for supplying heat to the storage chamber 102A. The heat medium flow path 102B is adjacent to the storage chamber 102A so that the heat medium (engine coolant) flowing through the heat medium flow path 102B and the water stored in the storage chamber 102A can exchange heat. A heat supply line 110 is connected to the heat medium flow path 102B. The heat supply line 110 is a bypass line for circulating engine cooling water between the heat medium flow path 102 </ b> B of the water tank 100 and the engine 14, and bypasses the radiator 12 with respect to the radiator circulation path 16. It is connected. As a result, heat exchange is possible between the engine coolant flowing in the radiator circulation path 16 upstream of the radiator 12 and the storage chamber 102A of the water tank 100. The heat supply line 110 is provided with a valve 112 that opens and closes the flow path.

  As shown in FIG. 2, the vehicle air conditioning system 10 includes a chemical heat storage ECU (Electronic Control Unit) 120 as a control device that controls the vehicle chemical heat storage system 60. The chemical heat storage ECU 120 is electrically connected to each of the water pump 106, the valves 70, 108, 112, the three-way valve 94, and the blower 84, and controls these operations. The chemical heat storage ECU 120 is electrically connected to a chemical heat storage material temperature sensor 122 that detects the temperature of the chemical heat storage material 66 and an evaporation chamber temperature sensor 124 that detects the temperature of the evaporation chamber 92A of the evaporator 90. The chemical heat storage material temperature sensor 122 and the evaporation chamber temperature sensor 124 receive a chemical heat storage material temperature signal and a condensing chamber temperature signal, respectively.

  The chemical heat storage ECU 120 is connected to an air conditioning ECU 130 that constitutes the vehicle air conditioning system 10. The air conditioning ECU 130 is electrically connected to each of the water pumps 18 and 76 and the valves 26, 28, 30 and 74, and controls these operations. The air conditioning ECU 130 is electrically connected to an outside air temperature sensor 132 that detects the temperature of the outside air of the vehicle, and an outside air temperature signal detected by the outside air temperature sensor 132 is input thereto. Further, an air conditioning temperature adjustment switch 134 provided on a dashboard (not shown) of the vehicle is electrically connected, and an air conditioning temperature signal is input from the air conditioning temperature adjustment switch 134.

  In addition, an engine ECU 136 is electrically connected to the air conditioning ECU 130. The engine ECU 136 controls the operation of the engine 14, and a rotational speed signal or the like of the engine 14 is input to the air conditioning ECU 130.

  Next, the operation of the first embodiment will be described.

  First, operation | movement of the chemical heat storage system 60 for vehicles is demonstrated. In the initial state of the vehicular chemical heat storage system 60 according to the present embodiment, the water vapor discharge line 86 and the water vapor supply line 88 are closed by the three-way valve 94, respectively. Moreover, the thick solid line and arrow shown by FIGS. 3-5 have shown the flow of fluids, such as water, water vapor | steam, and engine cooling water. Further, the white valve and the three-way valve indicate an open state of the flow, and the black valve and the three-way valve indicate a closed state of the flow.

  The chemical heat storage ECU 120 controls the vehicle chemical heat storage system 60 in the heat storage mode or the heat dissipation mode in response to a request from the air conditioning ECU 130. In the heat storage mode, as shown in FIG. 3, first, the chemical heat storage ECU 120 operates the valve 70 to open the exhaust line 68 and supply high-temperature exhaust gas to the heat medium flow path 64 </ b> B of the reactor 62. Next, the chemical heat storage ECU 120 operates the three-way valve 94 to open the water vapor discharge line 86 and the water vapor discharge supply line 96, and the reaction flow of the reactor 62 through the water vapor discharge line 86 and the water vapor discharge supply line 96 is opened. The passage 64A is connected to the condensing chamber 82A of the condenser 80, and the blower 84 and the water pump 106 are operated.

  As a result, in the reactor 62, the chemical heat storage material 66 in the reaction flow path 64 </ b> A undergoes a dehydration reaction due to the heat of the exhaust gas supplied from the exhaust line 68 to the heat medium flow path 64 </ b> B. Is made. At this time, the water vapor generated by the dehydration reaction of the chemical heat storage material 66 is introduced into the condensing chamber 82A of the condenser 80 through the water vapor discharge supply line 96 and the water vapor discharge line 86. The water vapor introduced into the condensing chamber 82A of the condenser 80 is cooled and condensed by the blower 84, and is collected in the storage chamber 102A of the water tank 100 by its gravity.

  In this state, when the temperature of the chemical heat storage material 66 input from the chemical heat storage material temperature sensor 122 exceeds a predetermined value, the chemical heat storage ECU 120 operates the three-way valve 94 and closes the water vapor discharge line 86 and the water vapor discharge supply line 96. At the same time, the blower 84 and the water pump 106 are stopped to end the heat storage mode.

  Next, in the heat dissipation mode, as shown in FIG. 4, the chemical heat storage ECU 120 operates the three-way valve 94 to open the water vapor supply line 88 and the water vapor discharge supply line 96, and these water vapor supply line 88 and water vapor discharge The reaction flow path 64A of the reactor 62 and the evaporation chamber 92A of the evaporator 90 are connected via the supply line 96, and the water pump 106 is operated. At this time, the air conditioning ECU 130 adjusts the opening degree of the water vapor discharge line 86 by the three-way valve 94 according to the heat release amount of the chemical heat storage material 66 requested from the air conditioning ECU 130, and supplies it to the reaction flow path 64 </ b> A of the reactor 62. Increase or decrease the amount of water vapor.

  Thereby, in the reaction flow path 64A of the reactor 62, the chemical heat storage material 66 causes a hydration reaction by the water vapor supplied from the evaporation chamber 92A of the evaporator 90, and dissipates heat along with the hydration reaction. This heat is released to the engine coolant by heat exchange between the chemical heat storage material 66 and the engine coolant in the refrigerant flow path 64C.

  Here, when water vapor is generated in the evaporation chamber 92A of the evaporator 90, the temperature of the evaporation chamber 92A gradually decreases due to the latent heat of evaporation, and there is a possibility that the generation efficiency of water vapor is reduced. Therefore, in this embodiment, as shown in FIG. 5, when the temperature of the condensation chamber 82 </ b> A input from the evaporation chamber temperature sensor 124 (see FIG. 2) becomes less than a predetermined value, the chemical heat storage ECU 120 operates the valve 112. Then, the heat supply line 110 is opened, and engine cooling water heated by the engine 14 is supplied to the heat medium passage 102B of the water tank 100. When the valve 26 of the radiator circulation path 16 is closed, the valve 26 is also opened, and when the water pump 18 is stopped, the water pump 18 is also operated.

  As a result, the engine cooling water supplied to the heat medium passage 102B of the water tank 100 and the water in the storage chamber 102A of the water tank 100 exchange heat, and the water in the storage chamber 102A is heated by the heat of the engine cooling water. Is done. The heated water is pumped by the water pump 106 to the evaporation chamber 92A of the evaporator 90. Thereby, the temperature drop of the evaporation chamber 92A is suppressed. When the temperature of the condensing chamber 82A input from the evaporation chamber temperature sensor 124 becomes equal to or higher than a predetermined value, the chemical heat storage ECU 120 operates the valve 112 to close the heat supply line 110 and the heat medium passage 102B of the water tank 100. Stop supplying engine cooling water to.

  In this state, when receiving a heat dissipation mode stop request from the air conditioning ECU 130, the chemical heat storage ECU 120 operates the three-way valve 94 to close the water vapor supply line 88 and the water vapor discharge supply line 96, and also stops the water pump 106, End heat dissipation mode.

  Next, the operation of the vehicle air conditioning system 10 will be described.

  The air conditioning ECU 130 controls the vehicle air conditioning system 10 based on the air conditioning temperature signal input from the air conditioning temperature adjustment switch 134 (see FIG. 2), the outside air temperature signal input from the outside air temperature sensor 132 (see FIG. 2), and the like. Control in heating mode or cooling mode. Hereinafter, control in the heating mode will be described, and control in the cooling mode will be described in other embodiments. In the initial state of the vehicle air conditioning system 10 according to the present embodiment, the valves 28 and 30 provided in the heater core circulation path 24, the valve 74 provided in the heat release line 72, and the heat supply line 110 are provided. The valve 112 is closed, and the valve 26 provided in the radiator circulation path 16 is opened.

  In the heating mode, first, the air conditioning ECU 130 determines the operating state of the engine 14 based on an engine speed signal or the like input from the engine ECU 136. When the air conditioning ECU 130 determines that the engine 14 is in operation, the air conditioning ECU 130 operates the valves 28 and 30 to open the heater core circulation path 24 and circulate engine cooling water through the heater core circulation path 24. During operation of engine 14, water pump 18 is operated by engine ECU 136. As a result, engine cooling water heated by the engine 14 is supplied to the heater core 22, and the heater core 22 exchanges heat with air conditioning air flowing in the air conditioning case 32, thereby heating the air conditioning air. The heated air-conditioning air is supplied to the vehicle interior from the desired defroster outlet 44, face outlet 46, and foot outlet 48 selected by the outlet switching dampers 50A and 50B.

  On the other hand, when the air conditioning ECU 130 determines that the engine 14 is stopped, the air conditioning ECU 130 sends a heat release mode signal to the chemical heat storage ECU 120 to operate the vehicle chemical heat storage system 60 in the heat release mode. Next, as shown in FIG. 4, the air conditioning ECU 130 operates the valves 28, 30, 74 to open the heater core circulation path 24 and the heat release line 72, and the water pump provided in the heat release line 72. 76 is operated to circulate engine cooling water in the heat release line 72.

  As a result, the engine cooling water supplied to the heat medium flow path 64B of the reactor 62 and the chemical heat storage material 66 in the reaction flow path 64A of the reactor 62 exchange heat, and accompanying the hydration reaction of the chemical heat storage material 66 The generated heat is released to the engine coolant, and the engine coolant is heated. The heated engine cooling water is supplied to the heater core 22 through the heater core circulation path 24 and the heat release line 72, and the heater core 22 exchanges heat with the air conditioning air flowing in the air conditioning case 32, thereby heating the air conditioning air. Is done. The heated air-conditioning air is supplied to the vehicle interior from the desired defroster outlet 44, face outlet 46, and foot outlet 48 selected by the outlet switching dampers 50A and 50B.

  As described above, in the vehicle air conditioning system 10 according to the present embodiment, even when the engine 14 is in a stopped state, the vehicle chemical heat storage system 60 is operated in the heat release mode, and the heat stored in the chemical heat storage material 66 is transferred to the heater core 22. By using this as a heat source, the temperature in the passenger compartment can be raised to a desired temperature.

  Further, by using the engine coolant circulating in the radiator circulation path 16 as a heat source, water in the storage chamber 102A of the water tank 100 is heated, and the heated water is supplied to the evaporation chamber 92A of the evaporator 90, thereby causing latent heat of evaporation. The temperature drop of the evaporation chamber 92A due to is suppressed. As a result, a decrease in water vapor generation efficiency in the evaporation chamber 92A is suppressed. Accordingly, the hydration reaction of the chemical heat storage material 66 can be maintained for a long period of time as compared with the configuration in which the water in the storage chamber 102A of the water tank 100 is not heated, so that the heated engine cooling water is supplied to the heater core 22. Can be supplied in the long term.

  In the present embodiment, as an example, when the vehicle chemical heat storage system 60 operates in the heat dissipation mode, the engine cooling water is supplied to the heat supply line 110 to heat the water stored in the storage chamber 102A of the water tank 100. However, it is not limited to this. For example, when the vehicular chemical heat storage system 60 operates in the heat storage mode, engine cooling water may be supplied to the heat supply line 110 to heat the water stored in the storage chamber 102A of the water tank 100. Further, the heat supply line 110 is connected to the heater core circuit 24 or the heat release line 72 downstream of the reactor 62, and the engine cooling water flowing from the reactor 62 to the heater core 22, that is, the engine heated by the reactor 62. It is also possible to heat the water stored in the storage chamber 102A of the water tank 100 using the cooling water as a heat source.

  Next, a second embodiment will be described. In addition, about the thing of the structure similar to 1st Embodiment, it attaches | subjects the same code | symbol and abbreviate | omits suitably, and demonstrates.

  FIG. 6 schematically shows a system configuration of the vehicle air conditioning system 140 according to the second embodiment. In the second embodiment, the vehicle chemical heat storage system 60 is used as a heat source for cooling (or dehumidification) in the vehicle air conditioning system 140. In the second embodiment, unlike the first embodiment, the heat supply line 110 is omitted.

  As shown in FIG. 6, a heat release line 142 for transferring the heat radiated by the chemical heat storage material 66 to the radiator 12 is connected to the refrigerant flow path 64 </ b> C of the reactor 62. The heat release line 142 is connected to the radiator circulation path 16, and supplies engine cooling water heated by heat exchange with the reactor 62 to the radiator 12. The heat release line 142 is provided with two valves 152 and 154 that open and close the flow path.

  On the other hand, the container 92 of the evaporator 90 is provided with a refrigerant flow path 92B for releasing the latent heat of evaporation generated with the generation of water vapor to the outside. The refrigerant flow path 92B is adjacent to the evaporation chamber 92A so that heat can be exchanged between the refrigerant (engine cooling water) flowing through the refrigerant flow path 92B and the air in the evaporation chamber 92A. A cold heat release line 144 is connected to the refrigerant flow path 92B. The cold heat release line 144 is a bypass line for circulating engine cooling water as a refrigerant between the refrigerant flow path 92 </ b> B of the evaporator 90 and the heater core 22, and bypasses the engine 14 with respect to the heater core circulation path 24. So connected. The cold heat release line 144 is provided with two valves 146 and 148 that open and close the flow path. Further, the cold heat release line 144 is provided with a water pump 150 for pumping engine cooling water to the heater core 22. The engine cooling water flowing through the cool heat release line 144 and the air in the evaporation chamber 92A of the evaporator 90 exchange heat, whereby the latent heat of evaporation in the evaporation chamber 92A is released to the engine cooling water, and the engine cooling water is cooled. It is like that.

  Here, in this embodiment, the heater core 22 functions as a cooling heat exchanger that cools the air-conditioning air. That is, the engine cooling water cooled in the evaporator 90 is configured to cool the air-conditioning air by exchanging heat with the air-conditioning air in the heater core 22.

  As shown in FIG. 7, the vehicle air conditioning system 140 includes a chemical heat storage ECU 120 and an air conditioning ECU 160 as control devices. The air conditioning ECU 160 is electrically connected to each of the valves 146, 148, 152 in addition to various devices connected to the air conditioning ECU 130 in the first embodiment, and controls these operations. In addition, the valves 74 and 112 are not connected to the chemical heat storage ECU 120 and the air conditioning ECU 160 in the present embodiment.

  Next, the operation of the second embodiment will be described.

  In the initial state of the vehicle air conditioning system 10 according to the present embodiment, the valves 28 and 30 provided in the heater core circulation path 24, the valves 152 and 154 provided in the heat release line 142, and the cold heat release line 144 are provided. The valves 146 and 148 are closed, and the valve 26 provided in the radiator circulation path 16 is opened. Further, thick solid lines and arrows shown in FIG. 8 indicate the flow of fluids such as water, water vapor, and engine cooling water. In addition, the white valve and the three-way valve indicate an open state of the flow, and the black valve and the three-way valve indicate a closed state of the flow.

  In the cooling mode, the air conditioning ECU 160 sends a heat release mode signal to the chemical heat storage ECU 120 to control the vehicle chemical heat storage system 60 in the heat release mode. Next, the air conditioning ECU 160 operates the two valves 146 and 148 to open the cold heat release line 144 and also operates the water pump 150 to circulate engine cooling water through the cold heat discharge line 144.

  Thus, the latent heat of evaporation in the evaporation chamber 92A is converted into the engine by heat exchange between the engine cooling water supplied to the refrigerant flow path 92B of the evaporator 90 via the cold heat release line 144 and the air in the evaporation chamber 92A of the evaporator 90. It is discharged into the cooling water, and the engine cooling water is cooled. The cooled engine cooling water is supplied to the heater core 22 via the cold heat release line 144, and the air conditioning air is cooled by exchanging heat with the air conditioning air flowing in the air conditioning case 32. The cooled air-conditioning air is supplied to the vehicle interior from the desired defroster outlet 44, face outlet 46, and foot outlet 48 selected by the outlet switching dampers 50A and 50B.

  In this state, the air conditioning ECU 160 operates the valves 152 and 154 to open the heat release line 142 and circulates engine cooling water through the heat release line 142 and the radiator circulation path 16. When the water pump 18 provided in the radiator circulation path 16 is not operating, the water pump 18 is also operated.

  Accordingly, the chemical heat storage material is exchanged by heat exchange between the engine coolant supplied to the heat medium flow path 64B of the reactor 62 via the heat release line 142 and the chemical heat storage material 66 in the reaction flow path 64A of the reactor 62. The heat generated by the hydration reaction 66 is released to the engine cooling water, and the chemical heat storage material 66 is cooled. On the other hand, the engine coolant heated by the heat exchange with the chemical heat storage material 66 is supplied to the radiator 12 and cooled. Thereby, the temperature rise of the reactor 62 is suppressed.

  As described above, in the present embodiment, by using the latent heat of vaporization of the evaporator 90 as a heat source for cooling (or dehumidification), the temperature in the passenger compartment can be set to a desired temperature without operating a refrigeration cycle (not shown) formed by the evaporator 38. Can be lowered to temperature. In particular, the present embodiment is excellent in that it can be used as a cooling heat source even when the engine 14 is stopped.

  On the other hand, since the water vapor generated in the evaporation chamber 92A of the evaporator 90 is supplied to the reaction channel 64A of the reactor 62, the hydration reaction of the chemical heat storage material 66 in the reaction channel 64A is promoted. The heat generated by the hydration reaction is dissipated by the radiator 12 through the engine coolant flowing through the heat release line 142 as described above. Therefore, the temperature of the chemical heat storage material 66 can be maintained at a predetermined temperature.

  Further, in the present embodiment, since the heater core 22 is diverted as a cooling heat exchanger that cools (or dehumidifies) air-conditioning air, it is not necessary to provide a new heat exchanger, and thus cost reduction can be achieved. . It is also possible to provide a new cooling heat exchanger in place of the heater core 22.

  Next, a third embodiment will be described. In addition, about the thing of the structure similar to 1st, 2nd embodiment, it attaches | subjects the same code | symbol and abbreviate | omits suitably, and demonstrates.

  FIG. 9 schematically shows a system configuration of a vehicle air conditioning system 170 according to the third embodiment. In the third embodiment, the vehicle chemical heat storage system 60 is used as a heat source for heating and cooling in the vehicle air conditioning system 170.

  As shown in FIG. 9, a heat release line 172 for transferring the heat radiated by the chemical heat storage material 66 to the radiator 12 and the heater core 22 is connected to the refrigerant flow path 64 </ b> C of the reactor 62. The heat release line 172 is connected to each of the radiator circulation path 16 and the heater core circulation path 24. The heat release line 172 is provided with valves 174 and 176. This heat release line 172 is a heating mode in which engine coolant is circulated between the refrigerant flow path 64C of the reactor 62 and the heater core 22 by the operation of the valves 28, 30, 152, 174, and 176 (thick line in FIG. 11). And a cooling mode (thick line in FIG. 12) for circulating engine cooling water between the refrigerant flow path 64C of the reactor 62 and the radiator 12.

  Further, on the downstream side of the reactor 62 in the heat release line 172, connection lines 178 and 180 for connecting the heat release line 172 and the cold heat release line 144 are provided. The connection line 178 is provided with a valve 182. Further, a three-way valve 184 is provided in the connection line 180. By the operation of the valve 182 and the three-way valve 184, a heating mode (thick line in FIG. 11) for circulating engine cooling water between the reactor 62, the evaporator 90, the heater core 22, and the engine 14, and the evaporator 90 And the heater core 22 are switched to a cooling mode (thick line in FIG. 12) in which engine cooling water as a refrigerant is circulated.

  As shown in FIG. 10, the vehicle air conditioning system 170 includes a chemical heat storage ECU 120 and an air conditioning ECU 190 as control devices. The air conditioning ECU 190 is electrically connected to each of the valves 174, 176, 182 and the three-way valve 184 in addition to the various devices connected to the air conditioning ECU 190 in the second embodiment, and controls these operations. It has become. A valve 112 is connected to the chemical heat storage ECU 120 in the present embodiment.

  Next, the operation of the third embodiment will be described.

  In the initial state of the vehicle air conditioning system 170 according to the present embodiment, the valves 28, 30, 176 provided in the heater core circulation path 24, the valves 152, 154, 174 provided in the heat release line 172, and the cold heat release line 144. The valves 146 and 148 provided in the valve, the valves 182 provided in the connection lines 178 and 180, and the three-way valve 184 are closed, and the valve 26 provided in the radiator circulation path 16 is opened. Moreover, the thick solid line and arrow shown by FIG.11 and FIG.12 have shown the flow of fluids, such as water, water vapor | steam, and engine cooling water. In addition, the white valve and the three-way valve indicate an open state of the flow, and the black valve and the three-way valve indicate a closed state of the flow.

  First, in the heating mode, the air conditioning ECU 190 determines the operating state of the engine 14 based on an engine speed signal or the like input from the engine ECU 136. When the air conditioning ECU 190 determines that the engine 14 is operating, the same control as in the first embodiment is performed.

  On the other hand, when the air conditioning ECU 190 determines that the engine 14 is stopped, as shown in FIG. 11, the air conditioning ECU 190 sends a heat release mode signal to the chemical heat storage ECU 120 to operate the vehicle chemical heat storage system 60 in the heat release mode. Next, the air conditioning ECU 190 operates the valves 28, 30, 152, and 174 to open the heater core circulation path 24 and the heat release line 172, and operates the water pump 18, and the heater core circulation path 24 and the heat release line 172. Circulate engine cooling water. FIG. 11 shows a state in which the heat release line 172 is closed by the valve 174 and the connection lines 178 and 180 are opened as will be described later. However, in the normal heat dissipation mode, the valve 174 is connected to the heat release line. 172 is opened and the connection lines 178 and 180 are closed.

  As a result, the engine coolant supplied to the heat medium flow path 64B of the reactor 62 via the heater core circulation path 24 and the heat release line 172 is heated with the chemical heat storage material 66 in the reaction flow path 64A of the reactor 62. The heat generated by the hydration reaction of the chemical heat storage material 66 is released to the engine cooling water, and the engine cooling water is heated. The heated engine cooling water is supplied to the heater core 22 via the heater core circulation path 24 and the heat release line 172, and the heater core 22 exchanges heat with the air conditioning air flowing in the air conditioning case 32, so that the air conditioning air is Heated. The heated air-conditioning air is supplied to the vehicle interior from the desired defroster outlet 44, face outlet 46, and foot outlet 48 selected by the outlet switching dampers 50A and 50B.

  In this state, when the temperature of the condensation chamber 82A of the condenser 80 input from the evaporation chamber temperature sensor 124 (see FIG. 10) becomes lower than a predetermined value, the air conditioning ECU 190 operates the valve 174 to close the heat release line 172. At the same time, the valve 182 and the three-way valve 184 are operated to open the connection lines 178 and 180, and the refrigerant is supplied to the refrigerant flow path 92 </ b> B of the evaporator 90 through the cold discharge line 144 heated by the reactor 62. As a result, the latent heat of evaporation in the evaporation chamber 92A is released to the engine cooling water by heat exchange between the engine cooling water supplied to the refrigerant flow path 92B and the air in the evaporation chamber 92A of the evaporator 90, and the evaporation chamber 92A is heated. The

  As described above, in the vehicle air conditioning system 10 according to the present embodiment, even when the engine 14 is in a stopped state, the vehicle chemical heat storage system 60 is operated in the heat release mode, and the heat stored in the chemical heat storage material 66 is transferred to the heater core 22. By using this as a heat source, the temperature in the passenger compartment can be raised to a desired temperature. Further, by using the latent heat of vaporization of the evaporator 90 as a heat source for cooling, the temperature in the passenger compartment can be lowered to a desired temperature without operating a refrigeration cycle (not shown) constituted by the evaporator 38.

  Further, by heating the evaporation chamber 92A of the evaporator 90 with the engine cooling water flowing from the reactor 62 to the heater core 22, that is, the engine cooling water superheated in the reactor 62, the temperature drop of the evaporation chamber 92A due to latent heat of evaporation is reduced. It is suppressed. Thereby, the hydration reaction of the chemical heat storage material 66 can be maintained for a long time as compared with the configuration in which the engine cooling water flowing from the reactor 62 to the heater core 22 and the evaporation chamber 92A of the evaporator 90 do not exchange heat. Therefore, the heated engine cooling water can be supplied to the heater core 22 for a long time.

  Next, in the cooling mode, the air conditioning ECU 190 sends a heat release mode signal to the chemical heat storage ECU 120 to cause the vehicle chemical heat storage system 60 to operate in the heat release mode. Next, as shown in FIG. 12, the air conditioning ECU 190 operates the valves 146 and 148 and the three-way valve 184 to open the cold heat release line 144 and to operate the water pump 150, and to supply engine cooling water to the cold heat discharge line 144. Circulate.

  Thus, the latent heat of vaporization is generated in the evaporation chamber 92A by heat exchange between the engine coolant supplied to the refrigerant flow path 92B of the evaporator 90 via the cold heat release line 144 and the air in the evaporation chamber 92A of the evaporator 90. It is discharged into the cooling water, and the engine cooling water is cooled. The cooled engine cooling water is supplied to the heater core 22 via the cold heat release line 144, and the air conditioning air is cooled by exchanging heat with the air conditioning air flowing in the air conditioning case 32. The cooled air-conditioning air is supplied to the vehicle interior from the desired defroster outlet 44, face outlet 46, and foot outlet 48 selected by the outlet switching dampers 50A and 50B.

  In this state, the air conditioning ECU 190 operates the valves 152, 154, and 174 to open the heat release line 172 and circulate cooling water through the heat release line 172 and the radiator circulation path 16. When the water pump 18 provided in the radiator circulation path 16 is not operating, the water pump 18 is also operated.

  As a result, the engine coolant supplied to the heat medium flow path 64B of the reactor 62 via the radiator circulation path 16 and the heat release line 172 and the chemical heat storage material 66 in the reaction flow path 64A of the reactor 62 are heated. The heat generated by the hydration reaction of the chemical heat storage material 66 is released to the engine cooling water, and the chemical heat storage material 66 is cooled. On the other hand, the engine coolant heated by the heat exchange with the chemical heat storage material 66 is supplied to the radiator 12 via the heat release line 172 and cooled.

  As described above, in this embodiment, by using the latent heat of vaporization of the evaporator 90 as a heat source for cooling, the temperature in the passenger compartment is lowered to a desired temperature without operating a refrigeration cycle (not shown) constituted by the evaporator 38. Can do. In particular, the present embodiment is excellent in that it can be used as a heat source for cooling even when the engine 14 is stopped.

  On the other hand, since the water vapor generated in the evaporation chamber 92A of the evaporator 90 is supplied to the reaction channel 64A of the reactor 62, the hydration reaction of the chemical heat storage material 66 in the reaction channel 64A is promoted. The heat generated by the hydration reaction is dissipated by the radiator 12 through the engine cooling water circulating through the radiator circulation path 16 and the heat release line 172 as described above. Therefore, the temperature of the chemical heat storage material 66 can be maintained at a predetermined temperature.

  In addition, although description is abbreviate | omitted, also in this embodiment, engine cooling water is supplied to the heat-medium flow path 102B of the water tank 100 similarly to 1st Embodiment, and in the storage chamber 102A with the heat | fever of engine cooling water Water may be heated.

  The first to third embodiments of the present invention have been described above. However, the present invention is not limited to such embodiments, and the first to third embodiments and various modifications may be used in appropriate combination. It goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Vehicle air conditioning system 12 Radiator 14 Engine 16 Radiator circulation path 22 Heater core 24 Heater core circulation path 60 Chemical heat storage system 62 for vehicle Reactor (reaction part)
66 Chemical heat storage material 80 Condenser (condensing part)
90 Evaporator (evaporator)
100 water tank (reservoir)
140 Air Conditioning System for Vehicle 170 Air Conditioning System for Vehicle

Claims (3)

A reservoir for storing water;
An evaporation unit that generates water vapor by evaporating water supplied from the storage unit;
The engine has a chemical heat storage material that dehydrates and stores heat by heat obtained by energy supply from the vehicle and hydrates and reacts with water vapor generated in the evaporation section to dissipate heat, and between the engine and the heater core. A reaction section provided so as to be capable of exchanging heat with the cooling liquid flowing through the heater core circulation path for circulating the cooling liquid for cooling, and releasing heat generated by the hydration reaction by heat exchange with the cooling liquid; ,
A condensing part for condensing water vapor generated by the dehydration reaction from the reaction part and returning it to the storage part;
Bei to give a,
The reservoir is provided to be able to exchange heat with the coolant flowing from the reaction portion to the heater core or the coolant flowing upstream of the radiator in a radiator circulation path for circulating the coolant between the engine and the radiator. , The water stored in the storage part is heated by heat exchange with the coolant,
Chemical heat storage system for vehicles. The evaporating unit is provided so as to be able to exchange heat with the coolant flowing from the reaction unit to the heater core, and supplies the energy of the latent heat of evaporation generated by the generation of the water vapor by heat exchange with the coolant.
The chemical heat storage system for vehicles according to claim 1. A heater core circulation path for circulating a coolant for cooling the engine between the engine and the heater core;
A radiator circulation path for circulating a coolant between the engine and the radiator;
The heat generated by the hydration reaction in the reaction section is released by heat exchange between the coolant flowing through the heater core circulation path and the reaction section, and the heater core is heated through the coolant. Or a vehicle chemical heat storage system according to claim 2;
A vehicle air conditioning system comprising:

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