JP2019043262A5

JP2019043262A5 -

Info

Publication number: JP2019043262A5
Application number: JP2017166627A
Authority: JP
Filing date: 2017-08-31
Publication date: 2019-12-12
Anticipated expiration: 2037-08-31

Description

上記目的を達成するため、請求項１に記載の車両用空調装置では、
冷媒を吸入して圧縮して吐出する圧縮機（１１）と、
圧縮機（１１）から吐出された冷媒の有する熱を熱源として、空調対象空間へ送風される空気を加熱する加熱部（１２、２２）と、
冷媒の有する熱を外気に放熱させる放熱部（１２、２３、８１）と、
冷媒の有する冷熱を利用して空気を冷却する冷却部（１４）と、
冷媒と熱媒体とを熱交換させて熱媒体を冷却する熱媒体冷却熱交換器（１７）と、
熱媒体冷却熱交換器（１７）に流入する冷媒を減圧させることが可能な減圧部（８０、１３、１６）と、
熱媒体冷却熱交換器（１７）で熱媒体から冷媒に吸熱させて、加熱部（１２、２２）で空気を加熱する空気加熱モードと、放熱部（１２、２３、８１）で冷媒から外気に放熱させて、冷却部（１４）で空気を冷却する空気冷却モードとを切り替えるモード切替部（１８、５４、８０）と、
車両の走行用モータに電力を供給し、充電される際に発熱し、熱媒体によって冷却される電池（３３）と、
電池（３３）が充電されている際に発熱し、熱媒体によって冷却される発熱機器（３６）と、
電池（３３）から電力の供給を受けることに伴って発熱し、電池（３３）よりも許容温度が高く、熱媒体が循環する走行系発熱機器（３５、３７）と、
熱媒体冷却熱交換器（１７）に熱媒体を循環させる熱媒体回路（３０）と、
外部電源によって電池（３３）が充電されている際に、熱媒体回路（３０）の熱媒体の温度が切替温度（Ｔ１）以上であると推定される場合、電池（３３）および発熱機器（３６）のうち少なくとも一方と熱媒体冷却熱交換器（１７）と走行系発熱機器（３５、３７）との間で熱媒体が循環するように熱媒体回路（３０）における熱媒体の流れを切り替える熱媒体流れ切替部（２４、３８、３９、４２）とを備える。 In order to achieve the above object, in the vehicle air conditioner according to claim 1,
A compressor (11) that sucks in, compresses and discharges the refrigerant;
A heating unit (12, 22) for heating the air blown into the air-conditioning target space, using the heat of the refrigerant discharged from the compressor (11) as a heat source;
A heat dissipating part (12, 23, 81) for dissipating heat of the refrigerant to the outside air;
A cooling section (14) for cooling the air using the cold heat of the refrigerant;
A heat medium cooling heat exchanger (17) for cooling the heat medium by exchanging heat between the refrigerant and the heat medium;
A decompression section (80, 13, 16) capable of decompressing the refrigerant flowing into the heat medium cooling heat exchanger (17);
An air heating mode in which heat is absorbed from the heat medium to the refrigerant by the heat medium cooling heat exchanger (17) and air is heated by the heating parts (12, 22), and from the refrigerant to the outside air by the heat radiating parts (12, 23, 81). A mode switching unit (18, 54, 80) that switches between an air cooling mode that radiates heat and cools the air in the cooling unit (14);
A battery (33) for supplying electric power to the vehicle driving motor, generating heat when charged, and being cooled by a heat medium;
A heat generating device (36) that generates heat when the battery (33) is being charged and is cooled by a heat medium;
Traveling heat generating devices (35, 37) that generate heat in response to the supply of power from the battery (33), have a higher allowable temperature than the battery (33), and circulate the heat medium;
A heat medium circuit (30) for circulating the heat medium in the heat medium cooling heat exchanger (17);
When the battery (33) is being charged by the external power source and the temperature of the heat medium in the heat medium circuit (30) is estimated to be equal to or higher than the switching temperature (T1), the battery (33) and the heat generating device (36 ) ) To switch the flow of the heat medium in the heat medium circuit (30) such that the heat medium circulates between at least one of the heat medium cooling heat exchanger (17) and the traveling system heating device (35, 37). A medium flow switching unit (24, 38, 39, 42).

そして、外部電源によって電池（３３）が充電されている際に、電池（３３）および発熱機器（３６）のうち少なくとも一方が発生する熱を熱媒体回路（３０）の熱媒体に蓄えるので、電池（３３）および発熱機器（３６）のうち少なくとも一方の熱容量を超えて蓄熱することができる。そのため、蓄熱量を増加させることができるので、充電によって発生する熱を一層有効利用して一層の省エネルギー化を図ることができる。 When the battery (33) is charged by the external power source, the heat generated by at least one of the battery (33) and the heat generating device (36) is stored in the heat medium of the heat medium circuit (30). It is possible to store heat exceeding the heat capacity of at least one of (33) and the heat generating device (36) . As a result, the amount of stored heat can be increased, so that the heat generated by charging can be more effectively used to further save energy.

これにより、外部電源によって電池３３が充電されている際に、電池３３、インバータ３５およびモータジェネレータ３７が発生する熱を低温冷却水回路３０の冷却水に蓄えるので、電池３３、インバータ３５およびモータジェネレータ３７の熱容量を超えて蓄熱することができる。そのため、蓄熱量を増加させることができるので、急速充電によって発生する熱を一層有効利用して一層の省エネルギー化を図ることができる。 Thereby, when the battery 33 is charged by the external power source, the heat generated by the battery 33 , the inverter 35 and the motor generator 37 is stored in the cooling water of the low-temperature cooling water circuit 30, so that the battery 33 , the inverter 35 and the motor generator are stored. It can store heat exceeding the heat capacity of 37 . As a result, the amount of stored heat can be increased, so that the heat generated by rapid charging can be more effectively used to further save energy.

Claims

A compressor (11) that sucks in, compresses and discharges the refrigerant;
A heating unit (12, 22) that heats the air blown to the air-conditioning target space using the heat of the refrigerant discharged from the compressor as a heat source,
A heat dissipating part (12, 23, 81) for radiating the heat of the refrigerant to the outside air;
A cooling section (14) for cooling the air using the cold heat of the refrigerant;
A heat medium cooling heat exchanger (17) for cooling the heat medium by exchanging heat between the refrigerant and the heat medium;
A decompression section (80, 13, 16) capable of decompressing the refrigerant flowing into the heat medium cooling heat exchanger;
An air heating mode in which the heat medium is caused to absorb heat from the heat medium by the heat medium cooling heat exchanger and the air is heated by the heating unit, and the cooling unit is configured to dissipate heat from the refrigerant to the outside air by the heat radiating unit. A mode switching unit (18, 54, 80) for switching between the air cooling mode for cooling the air at
A battery (33) for supplying electric power to a vehicle driving motor, generating heat when being charged, and being cooled by the heat medium;
A heat generating device (36) that generates heat when the battery is charged and is cooled by the heat medium;
Traveling heat generating devices (35, 37) that generate heat with the supply of power from the battery, have a higher allowable temperature than the battery, and circulate the heat medium;
A heat medium circuit (30) for circulating the heat medium in the heat medium cooling heat exchanger;
When it is estimated that the temperature of the heat medium of the heat medium circuit is equal to or higher than a switching temperature (T1) when the battery is charged by the external power source, at least one of the battery and the heat generating device A heat medium flow switching unit (24, 38, 39, 42) that switches the flow of the heat medium in the heat medium circuit so that the heat medium circulates between the heat medium cooling heat exchanger and the traveling system heat generating device. A vehicle air conditioner.

The heating unit heat-exchanges the refrigerant discharged from the compressor and the heat medium to heat the heat medium, and heat medium heating heat exchanger (12) and heat medium heating heat exchanger (12 And an air heating heat exchanger (22) for heating the air by exchanging heat between the heat medium and the air heated in
The heat medium circuit is a low temperature heat medium circuit (30);
And a high-temperature heat medium circuit (20) through which the heat medium flows independently of the low-temperature heat medium circuit,
The heat medium flow switching unit, when the battery by the external power source is charged if the temperature of the heating medium of the heat medium circuit is estimated to be switching temperature (T1) above, wherein the low temperature heat The vehicle air conditioner according to claim 1 , wherein the low-temperature heat medium circuit and the high-temperature heat medium circuit are connected by circulating the heat medium between the medium circuit and the high-temperature heat medium circuit.

The heat radiating section has a heat medium outside air heat exchanger (32) for exchanging heat between the heat medium and the outside air,
When the temperature of the heat medium in the heat medium circuit is estimated to be equal to or higher than a heat radiation temperature (T2) when the battery is charged by the external power source, the heat medium flow switching unit The vehicle air conditioner according to claim 1 or 2 , wherein the flow of the heat medium in the heat medium circuit is switched so that the heat medium circulates between the heat medium outside air heat exchanger.

A bypass passage (30e) for bypassing the battery and circulating the heat medium to the traveling system heat generating device;
When the battery is charged by the external power source, the heat medium flow switching unit is configured to detect the travel system heat generating device when the battery and the travel system heat generation device are estimated to have reached a bypass temperature (T3) or higher. and between the bypass passage, according to any one of 3 claims 1 to switch the flow of the heat medium in the heat medium circuit as the heating medium independently circulates from said battery Vehicle air conditioner.

The heating device is a charger (36) that charges the battery, has a higher allowable temperature than the traveling system heating device, and the heat medium circulates between the traveling system heating device,
When the battery is charged by the external power source and the temperature of the heat medium circuit is lower than a cut-off temperature (T4), the heat medium flow switching unit is configured between the charger and the battery. When the heat medium circulates and the temperature of the heat medium circuit is equal to or higher than the cut-off temperature, the flow of the heat medium in the heat medium circuit is prevented so that the heat medium does not circulate between the charger and the battery. The vehicle air conditioner according to any one of claims 1 to 4 to be switched.

The heat radiating section has a heat medium outside air heat exchanger (32) for exchanging heat between the heat medium and the outside air,
When the air cooling mode is predicted to be executed after the battery is charged, the heat medium flow switching unit circulates the heat medium between the battery and the heat medium outside air heat exchanger. The vehicle air conditioner according to any one of claims 1 to 5 , wherein the flow of the heat medium in the heat medium circuit is switched as described above.

The heat radiating section has a heat medium outside air heat exchanger (32) for exchanging heat between the heat medium and the outside air,
The heat medium flow switching unit circulates the heat medium between the heat generating device and the heat medium outside air heat exchanger when the air cooling mode is predicted to be executed after the battery is charged. The vehicle air conditioner according to any one of claims 1 to 6, wherein the flow of the heat medium in the heat medium circuit is switched.

Of the heat medium circuit, a heat accumulator (85) disposed at a portion where the heat medium circulates between the battery and the heat medium cooling heat exchanger and having a larger heat capacity per unit volume than the heat medium. The vehicle air conditioner according to any one of claims 1 to 7 .

Of the heat medium circuit, a heat accumulator (85) disposed in a portion where the heat medium circulates between the heat generating device and the heat medium cooling heat exchanger and having a larger heat capacity per unit volume than the heat medium. A vehicle air conditioner according to any one of claims 1 to 7 .

The heat medium circuit includes a heat accumulator (85) disposed in a portion where the heat medium circulates between the battery and the traveling heating device, and having a larger heat capacity per unit volume than the heat medium. Item 8. The vehicle air conditioner according to any one of Items 1 to 7 .

A heat accumulator (85) having a heat capacity per unit volume larger than that of the heat medium is disposed in a portion of the heat medium circuit where the heat medium circulates between the heat generating device and the traveling system heat generating device. The vehicle air conditioner according to any one of claims 1 to 7 .