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1. 发明专利

DE69531631T2 未知
公开(公告)号：DE69531631T2
公开(公告)日：2004-06-17
申请号：DE69531631
申请日：1995-03-17
申请人： HITACHI LTD
发明人： ENDO TAKESHI , TERADA HIROKIYO , KATSUMATA NAOTO , YAGI KOUSAKU , KAWASHIMA KENICHI
IPC分类号： F25B1/00 , F25B13/00 , F25B43/00

2. 发明专利

DE3422391A1 未知
公开(公告)号：DE3422391A1
公开(公告)日：1984-12-20
申请号：DE3422391
申请日：1984-06-15
申请人： HITACHI LTD
发明人： ATSUMI AKIRA , OGUNI KENSAKU , SENSHU TAKAO , TERADA HIROKIYO , YOSHIOKA KAZUO
IPC分类号： F25B1/00 , F25B41/00 , F25B31/00
摘要： A refrigeration apparatus has a refrigerant circuit which is constituted by a compressor, a condenser, a first pressure reducer, a gas-liquid separator, a second pressure reducer and an evaporator connected to one another in series. The refrigeration apparatus also has a gas injection line connected between a gaseous phase portion of the gas-liquid separator and a compression chamber of the compressor. The improvement comprises a liquid refrigerant extracting passage providing a communication between a portion of the gas-liquid separator at a predetermined level and a portion of the low-pressure side of the refrigerant circuit. With this arrangement, it is possible to stabilize the level of the liquid refrigerant in the gas-liquid separator.

3. 发明专利

DE3422390A1 未知
公开(公告)号：DE3422390A1
公开(公告)日：1984-12-20
申请号：DE3422390
申请日：1984-06-15
申请人： HITACHI LTD
发明人： ATSUMI AKIRA , SENSHU TAKAO , OGUNI KENSAKU , TERADA HIROKIYO , YOSHIOKA KAZUO
IPC分类号： F25B1/00 , F25B13/00 , F25B41/00 , F25B31/00
摘要： A refrigeration system suitable for use in an air conditioner has a main refrigerant circuit including a compressor, a condenser, a first pressure reducer, a gas-liquid separator, a second pressure reducer and an evaporator connected in series to form a closed loop, and a gas injection passage providing a communication between the gaseous phase part of the gas-liquid separator and a compression chamber of the compressor. A stop valve is disposed in the inlet and outlet pipes of the gas-liquid separator, and a bypass passage is provided for connecting directly the outlet pipe of the condenser to the inlet pipe of the evaporator to bypass the gas-liquid separator. The stop valve is adapted to be controlled such that, when the gas injection to the compressor through the gas injection passage is not conducted, the refrigerant flows through the bypass passage bypassing the gas-liquid separator, while the gas-liquid separator functions as a receiver for adjusting the amount of refrigerant circulated in the main refrigerant circuit.

4. 发明专利

ES2202353T3 未知
公开(公告)号：ES2202353T3
公开(公告)日：2004-04-01
申请号：ES95912460
申请日：1995-03-17
申请人： HITACHI LTD
发明人： ENDO TAKESHI , TERADA HIROKIYO , KATSUMATA NAOTO , YAGI KOUSAKU , KAWASHIMA KENICHI
IPC分类号： F25B1/00 , F25B13/00 , F25B43/00

5. 发明专利

ES2112090B1 未知
公开(公告)号：ES2112090B1
公开(公告)日：1998-10-16
申请号：ES9400031
申请日：1994-01-10
申请人： HITACHI LTD
发明人： TAKENAKA HIROSHI , TERADA HIROKIYO , IZUSHI MINETOSHI , OGUNI KENSAKU , NAGAI MAKOTO , SASAKI SHUNJI
IPC分类号： F24F3/06 , F24F11/00 , F25B13/00 , F24F11/02 , F25B41/04 , F25B41/06 , F25B49/02
摘要： An air conditioner comprises a first unit including a compressor and a heat exchanger, a second unit including a heat exchanger, a refrigerant circuit connecting the compressor and the heat exchanger of the first unit, with the heat exchanger of the second unit, through which a refrigerant flows, a refrigerant pressure reduction valve disposed in the refrigerant circuit and provided in the second unit, a control unit provided in the first unit for controlling the refrigerant pressure reduction valve in the second unit.

6. 发明专利

DE3508353A1 未知
公开(公告)号：DE3508353A1
公开(公告)日：1985-09-19
申请号：DE3508353
申请日：1985-03-08
申请人： HITACHI LTD
发明人： SUEFUJI KAZUTAKA , YASUDA HIROMU , HAYASHI MASAKATSU , ARATA TETSUYA , OGUNI KENSAKU , KURODA SHIGEAKI , ATSUMI AKIRA , ISHIBANE KYUHEI , TERADA HIROKIYO , SENSHU TAKAO , KOGURE HIROSHI
IPC分类号： F24F11/02 , F24D19/10 , F24F11/08 , F25B13/00 , G05D23/19 , F24F11/053 , G05D23/00
摘要： The present invention is characterized by selecting, during heating, the hot air blowing mode in which a compressor and a blower for an indoor heat exchanger are each controlled as to r.p.m. to control the temperature of outlet air blown from an air conditioner at a higher temperature, and the normal mode in which the room temperature is controlled. Also, as required, an air passage of the outlet is set to be narrow to blow hot air in a confined space, or the air passage of the outlet is set wide to disperse warm air during normal operation.

7. 发明专利

DE69531631D1 未知
公开(公告)号：DE69531631D1
公开(公告)日：2003-10-02
申请号：DE69531631
申请日：1995-03-17
申请人： HITACHI LTD
发明人： ENDO TAKESHI , TERADA HIROKIYO , KATSUMATA NAOTO , YAGI KOUSAKU , KAWASHIMA KENICHI
IPC分类号： F25B1/00 , F25B13/00 , F25B43/00

8. 发明专利

ES2112090A1 UN ACONDICIONADOR DE AIRE. 未知
公开(公告)号：ES2112090A1
公开(公告)日：1998-03-16
申请号：ES9400031
申请日：1994-01-10
申请人： HITACHI LTD
发明人： TAKENAKA HIROSHI , TERADA HIROKIYO , IZUSHI MINETOSHI , OGUNI KENSAKU , NAGAI MAKOTO , SASAKI SHUNJI
IPC分类号： F24F3/06 , F24F11/00 , F25B13/00 , F24F11/02 , F25B41/04 , F25B41/06 , F25B49/02
摘要： UN ACONDICIONADOR DE AIRE, QUE COMPRENDE UNA PRIMERA UNIDAD QUE INCLUYE UN COMPRESOR Y UN INTERCAMBIADOR TERMICO, UNA SEGUNDA UNIDAD QUE INCLUYE UN INTERCAMBIADOR TERMICO, UN CIRCUITO DE REFRIGERANTE QUE CONECTA EL COMPRESOR Y EL INTERCAMBIADOR TERMICO DE LA PRIMERA UNIDAD CON EL INTERCAMBIADOR TERMICO DE LA SEGUNDA UNIDAD, Y A TRAVES DEL CUAL FLUYE EL REFRIGERANTE, UNA VALVULA DE REDUCCION DE PRESION DE REFRIGERANTE DISPUESTA EN EL CIRCUITO DE REFRIGERANTE Y SITUADA EN LA SEGUNDA UNIDAD, Y UNA UNIDAD DE CONTROL SITUADA EN LA PRIMERA UNIDAD PARA CONTROLAR LA VALVULA DE REDUCCION DE PRESION DEL REFRIGERANTE EN LA SEGUNDA UNIDAD.

9. 发明专利

DE4025628A1 未知
公开(公告)号：DE4025628A1
公开(公告)日：1991-02-21
申请号：DE4025628
申请日：1990-08-13
申请人： HITACHI LTD
发明人： NAKAYAMA SUSUMU , OGUNI KENSAKU , YASUDA HIROMU , MINAKATA RUMI , URATA KAZUMOTO , MURAMATSU MASATOSHI , TOKUSA KENJI , SENSHU TAKAO , TERADA HIROKIYO , KITANI FUMIHIKO
IPC分类号： F24F3/06 , F25B13/00 , F25B41/04
摘要： An air-conditioner system having a compressor, a plurality of heat exchangers for heating or cooling the air in a room, a radiator for transferring heat energy of refrigerant outside of the room, a plurality of orifices, a manifold with a main port and a plurality of sub-ports, flow direction control multi-port valves directing the flow of the refrigerant from the compressor to the main port and not from the main port to the compressor when at least one of the heat-exchangers is heating the room. The refrigerant does not flow from the compressor to the radiator when at least one of the heat exchangers is heating and none of the heat exchangers is cooling. Also, it does not flow from the compressor to the main port but flows instead from the compressor to the radiator and from the main port to the compressor when none of the heat exchangers is heating and at least one of the heat exchangers is cooling. The system also employs a plurality of valve pairs each of which having a first valve and second valve such that the first valve opens (closes) when the second valve closes (opens). The first valves are arranged for providing flow of refrigerant to the inlet of the compressor from the heat exchangers and the second valves provide flow of refrigerant from the outlet port of the compressor to the respective heat exchanger first ports via the sub-ports of the manifold.

10. 发明专利

DE3720889A1 未知
公开(公告)号：DE3720889A1
公开(公告)日：1988-01-14
申请号：DE3720889
申请日：1987-06-24
申请人： HITACHI LTD
发明人： KURODA SIGEAKI , OGUNI KENSAKU , YASUDA HIROMU , TERADA HIROKIYO
IPC分类号： F25B47/02 , F25B13/00 , F25B41/04 , F25B47/00 , F24F11/00
摘要： An air conditioner includes a compressor, a four-way valve, an indoor heat exchanger, an expansion valve, an outdoor heat exchanger which are connected via pipings to form a heat pump type refrigerant circuit, the four-way valve being switched over to select a heating or cooling mode of operation. This air conditioner is further provided with a first and second branch pipes which extend from an outlet conduit of the compressor, the first branch pipe forming a first bypass pipe connected to an inlet conduit of the compressor. The first and second branch pipes have first and second valves, respectively. The air conditioner is also provided with a microcomputer for selectively opening and closing the second valve in response to the degree of superheating of discharged gaseous refrigerant after the first valve has been opened so that the discharged gaseous refrigerant is supplied to the outdoor heat exchanger to effect a defrosting operation while a heating operation is continued. When the degree of superheating of discharged gaseous refrigerant is low, a part of discharged gas is supplied to the inlet conduit so as to regulate the degree of superheating.

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