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41. 发明专利

JP2002022295A EJECTOR CYCLE 失效
公开(公告)号：JP2002022295A
公开(公告)日：2002-01-23
申请号：JP2000205528
申请日：2000-07-06
申请人： DENSO CORP
发明人： ISHIKAWA HIROSHI , HIROSE ATSUYUKI , IRITANI KUNIO , HIRATA TOSHIO , TOMATSU YOSHITAKA
IPC分类号： F25B1/00 , F25B9/00
摘要： PROBLEM TO BE SOLVED: To assure a required refrigerating capacity even in the case wherein thermal load of an evaporator decreases so that the flow rate is lowered. SOLUTION: When the flow rate (thermal load) is not less than a specified value, an ON/OFF valve 710 is opened to suck a refrigerant in an evaporator 300 by an ejector 400, and when the flow rate (thermal load) is less than the specified value, a decompression valve 700 is fully opened and simultaneously the ON/OFF valve 710 is closed to supply the refrigerant the pressure of which is reduced by a nozzle 410 (ejector 400) to the evaporator 300. Thus, an operation same as that of a vapor compression type refrigeration cycle is performed. By this method, even when the flow rate (thermal load) is less than a specified value, the flow rate of the refrigerant flowing in the evaporator 300 becomes a flow rate proportional to the flow rate discharged from the compressor 100 without being influenced by the flow speed of the refrigerant. Thus, a required refrigerating capacity is surely assured even in the case the thermal load of the evaporator 300 becomes small and the flow rate of the refrigerant is decreased.

42. 发明专利

JPH09286225A AIR CONDITIONER FOR VEHICLE 失效
公开(公告)号：JPH09286225A
公开(公告)日：1997-11-04
申请号：JP15850296
申请日：1996-06-19
申请人： DENSO CORP
发明人： KUSANO KATSUYA , ISAJI AKIRA , TSUCHIYA SHIZUO , KODAMA SATORU , EZAKA SATORU , OOMURA MITSUYO , ISHIKAWA HIROSHI , TAKEO YUJI , SUZUKI TAKAHISA
IPC分类号： B60H1/00 , B60H3/00
摘要： PROBLEM TO BE SOLVED: To provide an air conditioner for an electric vehicle, capable of exerting sufficient dehumidifying capacity even in a reduced necessity of heating capacity in dehumidifying as well as heating the interior, and preventing a reduction in heating capacity due to frosting on an interior heat exchanger in full necessity of heating capacity. SOLUTION: A first solenoid valve 31 is provided on a first refrigerant passage A which leads at a dehumidifying mode a refrigerant from a first decompressor 22 to an exterior heat exchanger 23 through a branch connection 45. A second solenoid valve 32 is provided on a second refrigerant passage B which leads at a dehumidifying mode the refrigerant from the first decompressor 22 to an interior heat exchanger 25 through the branch connection 45 by way of a second decompressor 24. The second solenoid valve 32 is always opened. On the other hand, an ECU 100 closes the first solenoid valve 31 to improve dehumidifying capacity when a detected value from a temperature sensor 115 after an evaporator is not less than a preset temperature, and opens the first solenoid valve 31 to improve dehumidifying as well as heating capacity when the detected value is below the preset value.

43. 发明专利

JP2002019444A HEAT PUMP TYPE AIR CONDITIONER 失效
公开(公告)号：JP2002019444A
公开(公告)日：2002-01-23
申请号：JP2000208826
申请日：2000-07-10
申请人： DENSO CORP
发明人： ISHIKAWA HIROSHI , IRITANI KUNIO
IPC分类号： B60H1/00
摘要： PROBLEM TO BE SOLVED: To prevent air conditioning capacity (cooling capacity and heating capacity) from lowering in both cases of a cooling operation and a heating operation. SOLUTION: A refrigerant is allowed to flow to an outdoor unit 300 so that the length of a refrigerant passage when performing the heating operation may be shorter than the length of the refrigerant passage from a refrigerant inflow port to a refrigerant outflow port of the outdoor unit 300 when performing a cooling operation. As a result, pressure loss generated in the outdoor unit 300 can be prevented from increasing in the outdoor unit 300 which has to perform heat exchange with air having a comparatively low temperature of 0 deg.C or below when performing the heating operation and thereby air conditioning capacity (cooling capacity and heating capacity) can be prevented from lowering in both cases of the cooling operation and the heating operation.

44. 发明专利

JP2002005532A FREEZING CYCLE APPARATUS 失效
公开(公告)号：JP2002005532A
公开(公告)日：2002-01-09
申请号：JP2000148460
申请日：2000-05-19
申请人： DENSO CORP
发明人： ITO SEIJI , IRITANI KUNIO , ISHIKAWA HIROSHI , HIROSE ATSUYUKI
IPC分类号： B60H1/03 , B60H1/18 , F24F11/02 , F25B1/00 , F25B27/00 , F25B39/02
摘要： PROBLEM TO BE SOLVED: To effectively recover waste heat even when the quantity of waste heat from a heat producing instrument is little. SOLUTION: In a gas injection freezing cycle apparatus, a heat exchanger 23 is provided for absorbing heat into a refrigerant from warm water where waste heat of a heat producing instrument 81 is recovered, There are changed over a mode where the heat exchanger 23 is set to the side of low pressure of a freezing cycle, and heat is absorbed from warm water into a low pressure refrigerant sucked into the compressor 22; and a mode where the heat exchanger 23 is set to the side of freezing cycle intermediate pressure, and heat is absorbed from the warm water into the intermediate pressure refrigerant introduced into a compressor gas injection port 22c.

45. 发明专利

JP2001027455A HEAT PUMP AIR CONDITIONER 失效
公开(公告)号：JP2001027455A
公开(公告)日：2001-01-30
申请号：JP2000083264
申请日：2000-03-21
申请人： DENSO CORP
发明人： ISHIKAWA HIROSHI , KUSANO KATSUYA , IRITANI KUNIO , TANAKA KATSUYA , HONDA KEITA
IPC分类号： B60H1/22 , B60H1/00 , B60H1/32 , F24F11/02 , F25B13/00 , F25B43/00 , F25B49/02
摘要： PROBLEM TO BE SOLVED: To enhance durability of the compressor in a heat pump air conditioner by improving the lubricating ability of the compressor. SOLUTION: Gas-liquid refrigerant passed through an outdoor heat exchanger 26 under heating mode is separated through an accumulator 24 and liquid refrigerant dissolved with oil is sucked from an oil return hole 25b made closely to the bottom part of the accumulator 24 and fed to a compressor 21 after being mixed with gas refrigerant. In such a heat pump air conditioner, delivery capacity of the compressor 21 is lowered forcibly below a normal target capacity when a decision is made that the liquid level of refrigerant in the accumulator 24 lowers abruptly toward the oil return hole 25b at the time of starting the heating mode.

46. 发明专利

JPH1067224A AIR-CONDITIONING DEVICE FOR VEHICLE 失效
公开(公告)号：JPH1067224A
公开(公告)日：1998-03-10
申请号：JP22717496
申请日：1996-08-28
申请人： DENSO CORP
发明人： ISHIKAWA HIROSHI , HOTTA NAOTO , TANAKA KATSUYA , ISHII KATSUYA
IPC分类号： B60H1/22 , B60H1/32
摘要： PROBLEM TO BE SOLVED: To reduce the size of an air-conditioning device for a vehicle while maintianing sufficient cooling and heating capabilities. SOLUTION: A cabin heat exchanger 11 is disposed in a first air passage 14. A cabin heat exchanger 12 is disposed in a second air passage 15. Then, when the cooling load in the cabin is high, the air in an air-conditioning unit 2 is cooled by both cabin heat exchangers 11 and 12. On the other hand, when the heating load in the cabin is high, the air in an air-conditioning unit 2 is heated by both cabin heat exchangers 11 and 12.

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