WO2004056594A1 - 空調装置 - Google Patents
空調装置 Download PDFInfo
- Publication number
- WO2004056594A1 WO2004056594A1 PCT/JP2003/015449 JP0315449W WO2004056594A1 WO 2004056594 A1 WO2004056594 A1 WO 2004056594A1 JP 0315449 W JP0315449 W JP 0315449W WO 2004056594 A1 WO2004056594 A1 WO 2004056594A1
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- WO
- WIPO (PCT)
- Prior art keywords
- refrigerant
- cooling water
- cooling
- heat exchanger
- water
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/004—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00928—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising a secondary circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00961—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising means for defrosting outside heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
- F25B2339/047—Water-cooled condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
Definitions
- the present invention relates to an air conditioner and an air conditioning method.
- the vehicle In the case of a hybrid electric vehicle equipped with a driving assistance engine, the vehicle is driven by a vehicle drive motor when traveling in an urban area, and is driven by an engine when the remaining battery level is low or when traveling in a suburb. It is. In the case of a hybrid electric vehicle equipped with a power generation engine, the vehicle is driven by a vehicle drive motor, and when the remaining battery power is low, the engine is started to charge the battery. ⁇
- the current air-conditioning system for electric vehicles generally drives the compressor (open type) of the refrigerating cycle with a motor for driving the vehicle, but the air-conditioning system for hybrid electric vehicles described above does not.
- the compressor When the engine is running, the compressor is driven by the engine to cool the passenger compartment.
- the compressor When the engine is stopped, the compressor is driven by the vehicle drive motor.
- the remaining fuel When the remaining fuel is low, start the engine and start the compressor. It is conceivable to cool the vehicle interior by driving.
- the interior of the vehicle is heated by simply blowing air to the heater core to which the engine cooling water is supplied.
- the time required for the air conditioning temperature to reach the target temperature was long.
- the engine cooling water was heated using a PTG heater as an auxiliary heating means. Even if it is not a hybrid electric vehicle, the engine of recent automobiles has become more sophisticated and the amount of heat radiated from the engine has decreased, so the engine cooling water is also heated using the PTC heater as an auxiliary heating means.
- an electric heater such as a PTC heater was used as the auxiliary heating means, the heating efficiency was lower than that of the heat pump type heating.
- a heat pump refrigeration cycle is configured using an electric compressor 104 (sealed type), and a refrigerant water heat exchanger 101 is provided in the refrigerant circuit as an auxiliary heating means for heating. If the temperature of the engine coolant is equal to or lower than the set temperature when the heating operation is instructed, the first solenoid valve 102 is closed and the second solenoid valve 103 is opened.
- the electric compressor 104 was driven (see Japanese Patent Application Laid-Open No. Hei 9-66722. The entire disclosure of the Japanese Patent Application Laid-Open No. Hei 9-66722 is incorporated herein by reference in its entirety. Into one.).
- the refrigerant / water heat exchanger 101 functions as a condenser. No refrigerant is supplied to the evaporator 105.
- the engine cooling water assisted and heated by the refrigerant water heat exchanger 101 flows through the heater core 106 without cooling the blast air, and the blast air in the duct is cooled. Because it can be heated, even if the temperature of the engine cooling water is low, the heating capacity could be increased without a PTC heater.
- a coolant water heat exchanger 101 is additionally provided as a heating means for heating the cooling water. Therefore, during heating, the solenoid valves 102 and 103, the pressure reducing valves 108 and 109, the outdoor heat exchanger 107, and the like are required to prevent the refrigerant from flowing into the evaporator 105, and it is difficult to save space. have.
- the temperature of the refrigerant flowing through the refrigerant water heat exchanger 101 sufficiently rises, and Since it takes time for the equipment to start up, there has been a problem that the time required for the air-conditioning temperature in the vehicle interior to reach the target temperature is prolonged, or that cool air is blown out of the heater core into the vehicle interior.
- An object of the present invention is to provide an air conditioner that can achieve space saving, shorten the time required to reach a target air conditioner temperature, and do not impair the comfort during slow frost in consideration of the above problems of the conventional air conditioner. It is an object.
- a first aspect of the present invention provides an evaporator that is disposed in a ventilation duct and cools air by evaporating a refrigerant; A compressor that sets the refrigerant at a high temperature and a high pressure; a refrigerant water heat exchanger that heats the cooling water by heat transfer from the refrigerant discharged from the compressor; and a refrigerant that is discharged from the refrigerant water heat exchanger A refrigeration cycle having a decompressor for reducing the pressure of
- a heater core installed on the downstream side of the evaporator with reference to a blowing direction in the blower duct to heat the blown air by the heated cooling water, a radiator for cooling the cooling water,
- a cooling water cycle having a pump for circulating the cooling water cooled by the radiator, a power engine cooled by using the cooling water sent from the pump, and the refrigerant water heat exchanger;
- the refrigeration cycle is an air conditioner that performs cooling for dehumidification.
- a second aspect of the present invention provides an evaporator that is disposed in a ventilation duct and cools air by evaporating a refrigerant, a compressor that evaporates the refrigerant at a high temperature and a high pressure, A refrigerant water heat exchanger that heats the cooling water by heat transfer from the refrigerant, a decompressor for reducing the pressure of the refrigerant discharged from the refrigerant water heat exchanger, and a refrigeration cycle that includes: A heater core installed on the downstream side of the evaporator based on the direction of air flow in the duct and heating the air blown by the heated cooling water, a radiator for cooling the cooling water, and cooling by the radiator A pump for circulating the cooled cooling water, a power engine cooled by using the cooling water fed from the pump, and a temperature of the cooling water heated by the power engine.
- a power machine exit water temperature detecting means for measuring 3 ⁇ 4; a bypass connecting the inlet and the outlet of the cooling water to the power engine; a bypass not passing through the power engine; and a branch of the bypass at the inlet of the power engine.
- a three-way valve installed in the An air conditioner comprising: control means for controlling the opening of the three-way valve using a value detected by a power engine outlet water temperature detecting means; and a cooling water cycle having the refrigerant water heat exchanger. is there.
- control means controls the three-way valve so that the cooling water bypasses the power engine when the power engine outlet water temperature is lower than a predetermined threshold value.
- the air conditioner according to the second aspect of the present invention which is control means for controlling a three-way valve so that the cooling water flows into the power engine when the power engine outlet water temperature is higher than a predetermined threshold value.
- a fourth aspect of the present invention provides an evaporator that is disposed in a ventilation duct and cools air by evaporating a refrigerant, a compressor that evaporates the refrigerant at a high temperature and a high pressure, and a compressor that is discharged from the compressor.
- An air conditioner comprising: a first coolant / water heat exchanger; and a cooling water cycle including the second coolant / water heat exchanger.
- control means is configured such that, when the refrigerant temperature at the evaporator inlet is lower than a temperature at which frost adheres to the evaporator, the refrigerant is supplied to the first decompressor.
- the pressure is controlled so that the pressure is reduced, and the second pressure reducer is opened. If the temperature is higher than the temperature at which frost adheres to the evaporator, the first pressure reducer is opened, and the second pressure reducer is opened.
- An air conditioner according to a fourth aspect of the present invention which is control means for performing pressure control so that the refrigerant is depressurized by the pressure reducer. ⁇
- a sixth aspect of the present invention is the refrigerant water heat exchanger according to any one of the first, second, and fourth aspects, wherein the refrigerant flow direction is opposite to the refrigerant flow direction. It is an air conditioner of the present invention.
- a seventh aspect of the present invention is the air conditioner according to the first, second, or fourth aspect of the present invention, wherein the refrigerant water heat exchanger is a refrigerant water heat exchanger wound around the compressor. .
- An eighth aspect of the present invention is the air conditioner according to the sixth aspect of the present invention, wherein carbon dioxide is used as the refrigerant.
- a bypass for connecting the inlet and the outlet of the cooling water to the heater core, the bypass not passing through the heater core, and the branch of the bypass at the inlet of the heater core.
- the air conditioner according to the first, second or fourth aspect of the present invention further includes a three-way valve and control means for controlling an opening degree of the three-way valve according to an operation mode.
- the blower duct is a blower duct that blows air into a vehicle
- the power engine is a first, second, or other vehicle power engine.
- 4 is an air conditioner of the present invention.
- the eleventh aspect of the present invention provides an air conditioner using the air conditioner of the first aspect of the present invention.
- a refrigeration cycle step including: a refrigerant water heat exchange step of heating the cooling water by heat transfer from the refrigerant; and a decompression step of decompressing the refrigerant discharged from the refrigerant water heat exchange step.
- a cooling water cycle comprising: a step of circulating the cooling water cooled by the radiator; a step of cooling the power engine by using the cooling water fed from the pump; and a step of exchanging the coolant water heat.
- a twelfth aspect of the present invention is an air conditioning method for performing air conditioning using the air conditioner of the second aspect of the present invention, wherein the evaporating method cools the blast air by evaporating the refrigerant in the ventilation duct.
- a refrigeration cycle step having a decompression step for decompressing the refrigerant discharged from
- a thirteenth aspect of the present invention is an air conditioning method for performing air conditioning using the air conditioner of the fourth aspect of the present invention, wherein the evaporating of the refrigerant in the ventilation duct cools the blown air.
- a first decompression step for controlling the decompression of the refrigerant discharged from the refrigerant water heat exchange step, and transfer of heat between the refrigerant discharged from the first decompression step and the cooling water.
- FIG. 1 is a configuration diagram of an air conditioner for a vehicle m according to Embodiment 1 of the present invention.
- FIG. 2 is a control flowchart of the vehicle air conditioner according to Embodiment 1 of the present invention.
- FIG. 3 is a configuration diagram of a vehicle m air conditioner according to Embodiment 2 of the present invention. .
- FIG. 4 is a control flowchart of a vehicle air conditioner according to Embodiment 2 of the present invention.
- FIG. 5 is a configuration diagram of a vehicle air conditioner according to Embodiment 3 of the present invention.
- FIG. 6 is a control flowchart of the vehicle air conditioner according to Embodiment 3 of the present invention.
- FIG. 7 is a Mollier diagram of a vehicle air conditioner according to Embodiment 3 of the present invention.
- FIG. 8 is a Mollier diagram of a vehicle air conditioner according to Embodiment 3 of the present invention.
- FIG. 9 is a configuration diagram of a compressor and a refrigerant / water heat exchanger according to Embodiment 4 of the present invention.
- FIG. 10 is a configuration diagram of a conventional vehicle air conditioner.
- Ventilation duct 2 Evaporator
- FIG. 1 is a configuration diagram showing a vehicle air conditioner according to Embodiment 1 of the present invention.
- the vehicle air conditioner according to the first embodiment includes a refrigeration cycle 13, a cooling water cycle 14, and a ventilation duct 1 for feeding temperature-regulated air into the vehicle.
- the refrigeration cycle 13 has an evaporator 2 in the ventilation duct 1 for cooling air by evaporating the refrigerant. Further, a compressor 3 for increasing the pressure of the refrigerant evaporated in the evaporator 2 is provided. A refrigerant / water heat exchanger 4 for heating the cooling water by the refrigerant discharged from the compressor 3 is provided. Further, the refrigerant discharged from the refrigerant water heat exchanger 4 is sent to the evaporator 2. It has a decompressor 5 for reducing the pressure before sending it.
- the cooling water cycle 14 has a heater core 6 installed downstream of the evaporator 2 with respect to the direction of air flow in the air duct 1. Further, a radiator 7 for cooling the cooling water and a pump 8 for circulating the cooling water cooled by the radiator 7 are provided. In addition, a power engine 9 of the vehicle to be cooled by the cooling water is installed. Further, a refrigerant / water heat exchanger 4 for heating the refrigerant with the cooling water is provided.
- the power engine 9 is a heat source such as an engine or a fuel cell. .
- the inlet side of the cooling water is the outlet side of the refrigerant
- the outlet side of the cooling water is the inlet side of the refrigerant. That is, the direction in which the cooling water flows and the direction in which the refrigerant flows are opposite.
- a three-way valve 10 is provided between the outlet of the refrigerant / water heat exchanger 4 and the inlet of the heater core 6.
- the three-way valve 10 is provided at one end, and the outlet of the heater core 6 and the inlet of the radiator 7 are provided.
- a bypass circuit 11 connecting the other end to the other end.
- control means 12 for controlling the opening direction of the three-way valve 10 according to the operation mode is provided.
- Control means 12 is provided for controlling the three-way valve 10.
- step 40 it is detected whether the operation mode of the air conditioner is the cooling mode or the heating dehumidification mode. 'Here, if the cooling mode is detected, the process proceeds to step 41, and the three-way valve 10 is controlled so that high-temperature cooling water flows to the bypass 11. What In FIG. 1, the cooling water flows in the direction of the arrow A in FIG. The operation of the refrigeration cycle 13 and the cooling water cycle 14 in the cooling mode will be described below.
- the refrigerant that has been compressed by the compressor 3 to become a high-temperature and high-pressure gas is radiated to the cooling water by the refrigerant-water heat exchanger 4.
- the refrigerant radiated by the refrigerant / water heat exchanger 4 is decompressed by the decompressor 5 and is introduced into the evaporator 2 in a low-temperature low-pressure gas-liquid two-phase state.
- the refrigerant evaporates due to heat absorption from the air in the room and becomes a gas-liquid two-phase or gas state, and is compressed by the compressor 3.
- the blast air flowing in the blast duct 1 is cooled and dehumidified by the evaporator 2.
- the cooling water cycle 14 the cooling water is pumped to the power engine 9 by the pump 8 and is heated by the power engine 9. Subsequently, in the coolant / water heat exchanger 4, the coolant is heated by heat transfer from the coolant. Next, since the three-way valve 10 is open in the direction in which the cooling water flows into the bypass 11, the high-temperature cooling water flows through the bypass 11. For this reason, the high-temperature cooling water does not flow to the heater core 6, so that the blast air in the blast duct 1 is not heated. Finally, return to step 40.
- step 40 If it is detected in step 40 that the mode is the heating and dehumidifying mode, the process proceeds to step 42, and the three-way valve 10 is controlled so that cooling water flows to the heater core 6. In FIG. 1, the cooling water flows in the direction of the arrow B.
- the refrigerating cycle 13 and the cooling water cycle 14 in the heating and dehumidifying mode will be described.
- the refrigeration cycle 13 in the heating and dehumidifying mode is the same as the operation in the cooling mode, and is omitted.
- the refrigeration cycle 13 acts as a dehumidifying function for the blown air in the blow duct 1.
- the cooling water cycle 14 The high-temperature cooling water heated by the power engine 9 and the refrigerant / water heat exchanger 4 flows to the heater core 6.
- the blast air in the blast duct 1 is heated.
- the solenoid valves 102, 103, the pressure reducing valve 108, and the outdoor heat exchanger 1 are used as in the conventional example. 07 is not required and space can be saved.
- the heating and dehumidifying mode can also remove fogging of the vehicle's front glass when the outside temperature is low.
- FIG. 3 is a configuration diagram of a vehicle air conditioner according to Embodiment 2 of the present invention.
- the configuration of the refrigeration cycle 26 is omitted because it is the same as that in the first embodiment.
- the cooling water cycle 27 does not include the three-way valve 10, the bypass 11, and the control means 12.
- a three-way valve 20 is provided between the power engine 9 and the pump 8, and the three-way valve 20 is provided at one end to provide a connection between the power engine outlet water temperature detecting means 21 and the refrigerant water heat exchanger 4.
- a bypass 22 is provided for connection as the other end.
- a control means 23 for controlling the opening direction of the three-way valve 20 using the value detected by the power engine outlet water temperature detection means 21 is provided.
- the direction in which the cooling water flows to the power engine 15 is defined as direction C
- the direction in which the cooling water flows to the bypass 22 is defined as direction D.
- the arrows in FIG. 3 indicate the C direction and the D direction, respectively.
- the heater core 24 according to the second embodiment includes a damper 25, unlike the heater core 6 according to the first embodiment.
- the damper 25 can be opened and closed. When the damper 25 is open, the blown air passes through the heater core 24, and when the damper 25 is closed, the flow of the blown air to the heater core 24 is shut off.
- the open state of the damper 25 is indicated by a two-dot chain line
- the closed state is indicated by a solid line.
- the three-way valve 20 is controlled so that the cooling water flows to the power engine 9.
- the cooling water pumped by the pump 8 is heated by the power engine 9 and then further heated by the refrigerant / water heat exchanger 4.
- the cooling water flows through the heater core 24, is further radiated by the radiator 7, and returns to the pump 8.
- the damper 25 of the heater core 24 is closed, the blown air cannot pass through the heater core 25 and cannot be heated.
- the cooling water cycle 27 first, when the operation in the heating / dehumidifying mode is started, the cooling water detected by the power engine outlet water temperature detecting means 3 ⁇ 421 in step 50; the cooling water temperature T1 and the desired set temperature Tx1 (For example, 40 ° C).
- the value of Tx 1 is a value set so that the indoor air temperature during the heating and dehumidifying operation does not impair comfort.
- the damper 25 is opened, and the opening force S is adjusted according to the set temperature Txl.
- T1 is smaller than Tx1
- the three-way valve 20 is controlled so that the cooling water flows in the D direction, so that the cooling water does not flow to the power engine 9 through the bypass circuit 22 and the coolant water heat exchanger 4 is provided to the heater core 24. Only the cooling water heated in is circulated. Therefore, the amount of heat radiated from the cooling water can be reduced by the low-temperature power engine 9, so that the temperature of the cooling water flowing through the heater core 24 can be increased more quickly. ⁇
- the blast air flowing into the heater core 24 with the damper 25 open is heated by the heated cooling water. After performing this control, the process returns to step 50.
- T1 is equal to or greater than Txl in step 50, this indicates that the temperature of the power engine 9 is sufficiently high and the temperature of the cooling water is at or above a certain value.
- the three-way valve 20 is controlled so that the cooling water flows in the C direction, so that the cooling water heated by the coolant water heat exchanger 4 and the power engine 9 flows through the heater core 24. Therefore, the temperature of the cooling water flowing through the heater core 24 can be increased without increasing the operating frequency of the compressor 3 and increasing the heating capacity of the refrigerant / water heat exchanger 4.
- the cooling water flows so as to bypass the low-temperature power engine 9 until the power engine 9 is heated to a certain temperature.
- the amount of heat radiation can be reduced, so that the heat flows to the heater core 24 more quickly.
- FIG. 5 is a configuration diagram of a vehicle air conditioner according to Embodiment 3 of the present invention. '' '
- Refrigeration cycle 36 has evaporator 2 and compressor 3 as in the second embodiment.
- the first refrigerant water heat exchanger 30, the second refrigerant water heat exchanger 32, and the two refrigerant water heat exchangers 32 A first decompressor 31 is provided between the heat exchangers 30 and 32.
- the pressure reducer 12 in the second embodiment is the second pressure reducer 33 in the third embodiment.
- an evaporator inlet refrigerant temperature detecting means 34 is provided between the second decompressor 33 and the evaporator 4. Further, a control means 35 for controlling the first decompressor 31 and the second decompressor 33 based on the value of the evaporator inlet refrigerant temperature detection means 34 is provided. Also, in the cooling water cycle 37, unlike the second embodiment, the three-way valve 20, the noise valve, and the like. 22; it does not have power engine outlet water temperature detection means 21 and control means 23.
- the operation in the cooling mode will be described. +.
- the first decompressor 31 is opened so that the refrigerant is not depressurized, and the second decompressor 33 is controlled so that the refrigerant is depressurized.
- the high-temperature and high-pressure refrigerant in the compressor 3 is transferred to the first refrigerant water heat exchanger 30 and the second refrigerant water heat exchanger 32.
- heat is dissipated by transferring heat to the cooling water.
- the refrigerant is depressurized by the first pressure reducer 31, and the evaporator 2 cools and dehumidifies the air blown in the air duct 1.
- the cooling water pumped by the pump 8 is heated by the power engine 9 and then heated by the second refrigerant / water heat exchanger 33. Subsequently, the first refrigerant / water heat exchanger 30 is heated. Next, the cooling water flows to the heater core 24. Here, the damper 25 of the heater core 24 is in a closed state, and the blowing air does not flow to the heater core 24, so that the blowing air cannot be heated. Next, after the heat is radiated by the radiator 7, the flow returns to the pump 8. '
- the refrigerant temperature T2 detected by the evaporator inlet temperature detecting means 34 in step 60 is compared with the target set temperature Tx2 (for example, 0 ° C.).
- Tx2 is a temperature set so that the evaporator 2 does not frost.
- FIG. 7 is an illustration of the state of the refrigeration cycle 36 described above in Mollier diagram, a first Ql heat radiation amount of the refrigerant-water heat exchanger 3 f 0, a second refrigerant-water heat exchanger
- Q2 the heat absorption of the evaporator 2
- Q3 the heat absorption of the evaporator 2
- the first refrigerant / water heat exchanger 30 acts as a radiator and the second refrigerant / water heat exchanger 32 acts as an evaporator
- the heat exchange transfer acting as an evaporator is performed. Heat area increases, evaporating temperature rises By doing so, the occurrence of frost on the evaporator 2 can be avoided.
- T2 is equal to or greater than Tx2
- the possibility of frost formation on the evaporator 2 is low, so proceed to step 62 and control the first decompressor 31 to be fully open.
- the second decompressor 33 is controlled to reduce the pressure, the private
- FIG. 8 is a Mollier diagram showing the state of the refrigeration cycle 36 described above, where the heat release amount of the first refrigerant water heat exchanger 30 is Q 4, and the second refrigerant water heat exchanger The heat release amount of 32 is expressed as Q5, and the heat absorption amount of the evaporator 2 is expressed as Q6.
- the heating operation can be performed while maximizing the amount of heat absorbed by the evaporator 2 installed indoors, that is, maximizing the amount of dehumidification.
- the damper 25 of the heater core 24 is open, and the blown air passes through the heater core 24 and is heated.
- the second refrigerant water heat exchanger 32 acts as an evaporator. Since the evaporating temperature can be raised, frost formation on the evaporator 2 can be avoided without impairing comfort.
- the vehicle air conditioner may be a combination of the refrigeration cycle 36 of the third embodiment and the cooling water cycle 27 of the second embodiment. In this case, at the time of startup immediately after the heating and dehumidifying mode operation, immediate warming, that is, comfortability can be enhanced, and frost formation on the evaporator 2 can be avoided without impairing comfort.
- the heater core 24 having the damper 25 is not installed, and a bypass connecting the inlet Q of the cooling water to the heater core and the outlet is installed as in the first embodiment.
- the cooling water may not be passed through the heater core during cooling.
- FIG. 9 shows an integrated configuration of the compressor 3 and the refrigerant / water heat exchanger 4 according to Embodiment 4 of the present invention.
- the refrigerant / water heat exchanger 4 in FIG. 1 is a double pipe, and has a structure in which the refrigerant flows inside so that the water flows in a counterflow direction.
- This refrigerant / water heat exchanger 4 is wound around the compressor 3.
- the enlarged view of the part A shows the inlet of the refrigerant, which has been made high-temperature and high-pressure by the compressor 3, in the refrigerant-water heat exchanger 4.
- the refrigerant pipe is smaller than the cooling water pipe, enters the cooling water pipe from the exit side of the cooling water heat exchanger 4, and enters the cooling water refrigerant water heat exchanger 4. From the inlet side of the cooling water pipe.
- the compressor 3 and the refrigerant / water heat exchanger 4 can be installed separately. Space saving can be achieved as compared with.
- the heat radiation from the compressor 3 can be used as a heating source of the cooling water, the temperature of the water flowing to the heater cores 4 and 24 can be increased more quickly.
- the structure of the refrigerant / water heat exchanger of the present invention is not limited to this double-pipe structure, and may be any structure that can transfer heat between the refrigerant and the cooling water.
- the directions in which the cooling water and the refrigerant flow are countercurrent, but they may be in the same direction.
- the refrigerant is carbon dioxide, the high pressure side becomes a supercritical cycle. Dissipates heat while constantly changing the temperature.
- the first and second pressure reducers of the present invention correspond to the pressure reducer 5 in the first and second embodiments
- the first pressure reducer and the second pressure reducer of the fourth present invention correspond to the embodiments.
- This corresponds to the first pressure reducer 31 and the second pressure reducer 33 in the third embodiment.
- the pressure reducer of the present invention is constituted by a valve capable of adjusting the flow rate.
- the pressure reducer is not limited to this structure and may be a pressure reducer capable of controlling the pressure of the fluid. do it.
- the power engine and the air conditioner according to the present invention are a power engine and an air conditioner used in a power plant corresponding to a power engine for a vehicle and an air conditioner. It may be a power engine of an aircraft or an air conditioner, and is not limited to vehicles. Industrial applicability
- the evaporating temperature can be increased, so that frost formation on the evaporator can be avoided without impairing comfort.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03777181A EP1568524A1 (en) | 2002-12-06 | 2003-12-03 | Air conditioner |
US11/144,295 US7069983B2 (en) | 2002-12-06 | 2005-06-03 | Air conditioner |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-355430 | 2002-12-06 | ||
JP2002355430A JP3736847B2 (ja) | 2002-12-06 | 2002-12-06 | 空調装置及び空調方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/144,295 Continuation US7069983B2 (en) | 2002-12-06 | 2005-06-03 | Air conditioner |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004056594A1 true WO2004056594A1 (ja) | 2004-07-08 |
Family
ID=32677058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/015449 WO2004056594A1 (ja) | 2002-12-06 | 2003-12-03 | 空調装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7069983B2 (ja) |
EP (1) | EP1568524A1 (ja) |
JP (1) | JP3736847B2 (ja) |
WO (1) | WO2004056594A1 (ja) |
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US7069983B2 (en) * | 2002-12-06 | 2006-07-04 | Matsushita Electric Industrial Co., Ltd. | Air conditioner |
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2002
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-
2003
- 2003-12-03 EP EP03777181A patent/EP1568524A1/en not_active Withdrawn
- 2003-12-03 WO PCT/JP2003/015449 patent/WO2004056594A1/ja not_active Application Discontinuation
-
2005
- 2005-06-03 US US11/144,295 patent/US7069983B2/en not_active Expired - Fee Related
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US7069983B2 (en) * | 2002-12-06 | 2006-07-04 | Matsushita Electric Industrial Co., Ltd. | Air conditioner |
Also Published As
Publication number | Publication date |
---|---|
EP1568524A1 (en) | 2005-08-31 |
JP3736847B2 (ja) | 2006-01-18 |
US20050241818A1 (en) | 2005-11-03 |
JP2004188995A (ja) | 2004-07-08 |
US7069983B2 (en) | 2006-07-04 |
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