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1. 发明专利

JP2003120555A SCROLL COMPRESSOR AND AIR CONDITIONER 审中-公开
公开(公告)号：JP2003120555A
公开(公告)日：2003-04-23
申请号：JP2001312107
申请日：2001-10-10
申请人： HITACHI LTD
发明人： NAKAMURA HIROO , DAISAKA HISASHI , TAKAKU SHOJI , OTA KAZUTOSHI , ENDO TOMOHITO , NAKADA YUKICHI , TAMURA KAZUMI , YASUNAGA YASUHISA , KOYAMA MASAKI
IPC分类号： F04C18/02
摘要： PROBLEM TO BE SOLVED: To improve the performance of an asymmetric scroll compressor and further an air conditioner adopting it, by injecting a sufficient amount of gas refrigerant to two compression chambers of the asymmetric scroll compressor provided with a fixed scroll having a large winding angle and a rotating scroll having a small winding angle through an injection port. SOLUTION: The fixed scroll of this asymmetric scroll compressor comprises one injection port provided a position where the gas refrigerant can be successively and intermittently injected to two compression chambers differed in sealed capacity for a relatively long period and the injected gas coolant never flows out to suction side. According to such a structure, a sufficient amount of the gas refrigerant with injection pressure (middle pressure) separated by a gas-liquid separator can be injected in the middle of the compression process of the compressor.

2. 发明专利

JP2002061867A AIR CONDITIONER 失效
公开(公告)号：JP2002061867A
公开(公告)日：2002-02-28
申请号：JP2000255729
申请日：2000-08-22
申请人： HITACHI LTD
发明人： HAKAMAYA NOBUSUKE , TAKADA YOSHIHIRO , OTA KAZUTOSHI , MIYAZAKI NORIO
IPC分类号： F24F1/00
摘要： PROBLEM TO BE SOLVED: To provide an air conditioner which suppresses noise, without dropping the quantity of wind, in an indoor blast mechanism. SOLUTION: In an air conditioner which is equipped with a once-through fan 2 whose outside diameter changes as the blast fan of an indoor unit, a straightening vane 8 is attached to the intersecting point between a nose 10 opposed to the maximum position of the outside diameter of the vane and an upper casing 19.

3. 发明专利

JPH11325538A IMPROPER WIRING DETECTION METHOD OF MULTI-TYPE AIR-CONDITIONING EQUIPMENT 失效
公开(公告)号：JPH11325538A
公开(公告)日：1999-11-26
申请号：JP12560298
申请日：1998-05-08
申请人： HITACHI LTD
发明人： FUKUDA TAKASHI , OTA KAZUTOSHI , HONDA KAZUHIRO
IPC分类号： F24F11/02
摘要： PROBLEM TO BE SOLVED: To quickly and securely judge improper wiring merely by the trial operation of an outdoor machine, by detecting the temperature change of either refrigerant path by a temperature sensor being attached to the outdoor machine, and by judging the presence and absence of the improper wiring based on the consistency/inconsistency of the refrigerant path and a signal wiring corresponding to an indoor machine. SOLUTION: When a trial operation switch 19 being provided in an outdoor machine Z is pressed, a first electric on/off valve 5A is opened, at the same time, a compressor 1 is operated, and a refrigerant passes through a four-way change-over valve 2 for circulating to an outdoor heat exchanger 3, the electric on/off valve 5A, an indoor heat exchanger 6, and an accumulator 8. At this time, the detection signal of temperature sensors 17A and 17B being provided in indoor machines A and B via signal wiring that should be connected to the first indoor machine A being connected to the outdoor machine Z is inputted into a microcomputer being provided in the outdoor machine Z. Then, the temperature of a refrigerant path 20A where the temperature sensor A is provided is rapidly reduced, thus judging whether refrigerant wiring properly corresponds to signal wiring for connection according to a detection signal at that time.

4. 发明专利

JPH06323673A MULTI-ROOM TYPE AIR-CONDITIONER 失效
公开(公告)号：JPH06323673A
公开(公告)日：1994-11-25
申请号：JP11680193
申请日：1993-05-19
申请人： HITACHI LTD
发明人： ABE SHINICHI , AOKI YUKIO , OTA KAZUTOSHI
IPC分类号： F24F11/02 , F25B13/00
摘要： PURPOSE:To prevent an abrupt rise of a high pressure side pressure of a refrigerating cycle by making the valve travel of a motor-driven expansion valve corresponding to a stopped room unit larger than that of the valve immediately before it is stopped when any of a plurality of room units which are driven to heat is stopped. CONSTITUTION:When two room units are operated to heat, high pressure gas refrigerant from a compressor 1 is fed from a four-way valve 2 to room side heat exchangers 6, 7 via a tube 8 to motor-driven expansion valves 4, 5 to be reduced under pressure. When the operation of one of the two room units 9 is stopped, a load to the compressor 1 is instantaneously increased, and the high pressure side pressure of a refrigerating cycle is abruptly raised. Then, the valve 4 to the stopped room unit 9 is opened for a predetermined time with its valve travel made larger than that of the valve immediately before stopping. Thus, more refrigerant flows to reduce the load to the compressor 1, thereby preventing abrupt rise of the high pressure side pressure of the cycle.

5. 发明专利

JPH0351670A FREEZING CYCLE 失效
公开(公告)号：JPH0351670A
公开(公告)日：1991-03-06
申请号：JP18460789
申请日：1989-07-19
申请人： HITACHI LTD
发明人： SAKAZUME AKIO , HASEGAWA JUNICHI , KASHIWAZAKI SUSUMU , YAMASHITA MASAHARU , AOKI YUKIO , OTA KAZUTOSHI , MATSUSHIMA HIROAKI
IPC分类号： F25B13/00
摘要： PURPOSE:To shut off a flow of refrigerant flowing to a heat exchanger of a stopped indoor device with a number of valves by a method wherein a heating throat is arranged between a cooling throat device and an indoor heat exchanger, a check valve is arranged in parallel with the throat and at the same time a branch control device is arranged between the indoor heat exchanger and a four-way valve. CONSTITUTION:A solenoid valve 32b of a branch control device 33 connected to an indoor heat exchanger 30b of au indoor device 31b to be stopped during a cooling operation is closed. Liquid refrigerant from an outdoor heat exchanger 23 is metered with a capillary tube 24 of a cooling throat device 20, its pressure is reduced and the refrigerant passes from the first connection port 35a of the branch device 34 through a check valve 29a, an indoor heat exchanger 30a, a solenoid valve 32a, a four-way valve 22 and an accumulator 57 and returns to a compressor 21. At this time, since the solenoid valve 32b is closed, the refrigerant is not flowed to the heat exchanger 30b of the indoor device 32b and further since the indoor heat exchanger is connected to a low pressure side through a capillary tube 28b, the liquid refrigerant may not be accumulated in the indoor heat exchanger 30b.

6. 发明专利

JPH01139964A MULTI-CHAMBER TYPE AIR CONDITIONER 失效
公开(公告)号：JPH01139964A
公开(公告)日：1989-06-01
申请号：JP29750287
申请日：1987-11-27
申请人： HITACHI LTD
发明人： HASEGAWA JUNICHI , SUDO MAREO , OTA KAZUTOSHI , NAKAMURA HIROYUKI
IPC分类号： F25B13/00
摘要： PURPOSE: To prevent lubricating oil from being diluted, by providing a solenoid valve on a refrigerant piping at a delivery port of each of a plurality of indoor units, and flowing a refrigerant passing through the heat exchanger of the indoor unit under operation into the indoor unit under interruption through a throttle mechanism for cooling. CONSTITUTION: An indoor unit under operation is judged to be an indoor unit 9' including an indoor heat exchanger 9, and simultaneously opens a heating inlet solenoid valve 11 and a cooling inlet solenoid valve 5, to which a refrigerant is flowed. Further, the indoor unit in interruption is judged to be an indoor unit 10' including an indoor heat exchanger 10 to open a cooling inlet solenoid valve 6 but with a heating inlet solenoid valve 12 kept closed intactly. As a result, the refrigerant flows to the indoor heat exchanger 10 after passage through a throttle mechanism 8 for cooling with more reduced resistance than a throttle mechanism 4 for heating. Once a predetermined time is elapsed after the operation is started, a solenoid valve 6 of an interruption indoor unit is closed. The refrigerant is gradually returned from a capillary 17 to a compressor low pressure side. As a result, upon operation starting with the reduced number of the indoor units dilution of lubricating oil due to residual refrigerant return to the compressor is restricted, and hence reliability of the compressor is improved.

7. 发明专利

JP2007101177A Air conditioner or refrigerating cycle device 审中-公开
标题翻译：空调或制冷循环装置
公开(公告)号：JP2007101177A
公开(公告)日：2007-04-19
申请号：JP2007005287
申请日：2007-01-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： FUNAKOSHI SAHO , NAKAMURA HIROO , SHINOZAKI HIROSHI , OTA KAZUTOSHI
IPC分类号： F24F11/02 , F25B1/00
摘要： PROBLEM TO BE SOLVED: To exhibit a performance improving effect by injection to the maximum by appropriately controlling two throttle devices in a refrigerating cycle which performs injection to a compressor. SOLUTION: A two-way valve is closed for a predetermined time from the start of operation, and the opening of a downstream throttle is restricted to a predetermined amount when the two-way valve is opened. When the rotating speed of the compressor is lower than a predetermined value, the two-way valve is closed, and when the two-way valve is closed, the downstream throttle out of the two throttle devices is fully opened. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：通过适当地控制向压缩机进行喷射的制冷循环中的两个节气门装置，通过最大程度地注射来表现出提高效果。解决方案：从开始运转开始，一个二通阀关闭一段预定的时间，并且当开闭阀时，一个下游节气门的打开被限制在一个预定的数量。当压缩机的转速低于预定值时，二通阀关闭，当二通阀关闭时，两个节流装置中的下游节流阀完全打开。版权所有（C）2007，JPO＆INPIT

8. 发明专利

JP2002081779A AIR CONDITIONER 失效
公开(公告)号：JP2002081779A
公开(公告)日：2002-03-22
申请号：JP2000276611
申请日：2000-09-07
申请人： HITACHI LTD
发明人： NAKAMURA HIROO , FUNAKOSHI SAHO , OTA KAZUTOSHI , TAKAKU SHOJI , DAISAKA HISASHI
IPC分类号： F25B1/00 , F25B13/00 , F25B29/00
摘要： PROBLEM TO BE SOLVED: To make cycle reheating dehumidification possible in an air conditioner employing a refrigeration cycle having a gas injection circuit by considering the problems that liquid injection can occur in cycle reheating dehumidification using a cooling cycle and refrigerant passing through an indoor heat exchanger is present in cycle reheating dehumidification using a heating cycle. SOLUTION: The refrigeration cycle comprises at least an injectable compressor 1, an outdoor heat exchanger 3, a gas-liquid separator 5, two throttling devices 4 and 6 disposed upstream and downstream of the separator and indoor heat exchangers 7 and 9 divided into two by a throttling device 8 for defrosting operation. Gas can be injected from the gas liquid separator 5 to the compressor 1 through an injection valve 10. The gas injection valve 10 is closed when operation for cycle reheating dehumidification is performed.

9. 发明专利

JP2002081769A AIR CONDITIONER 失效
公开(公告)号：JP2002081769A
公开(公告)日：2002-03-22
申请号：JP2000278659
申请日：2000-09-08
申请人： HITACHI LTD
发明人： FUNAKOSHI SAHO , NAKAMURA HIROO , SHINOZAKI HIROSHI , OTA KAZUTOSHI
IPC分类号： F24F11/02 , F25B1/00
摘要： PROBLEM TO BE SOLVED: To exhibit the performance rise by injection to its maximum by controlling two pieces of throttle devices properly, in a refrigerating cycle which performs injection to a compressor. SOLUTION: This air conditioner detects the number of revolutions of a compressor and outside air temperature, and controls the quantity of throttling of a downstream throttle device, according to the number of revolutions of the compressor and the outside air temperature, and also if it detects liquid injection state from the temperature of a refrigerant discharged from the compressor and the temperature of the refrigerant sucked in the compressor, it opens a downstream expansion valve to prevent the performance drop caused by liquid injection.

10. 发明专利

JP2002061923A AIR CONDITIONER 失效
公开(公告)号：JP2002061923A
公开(公告)日：2002-02-28
申请号：JP2000254258
申请日：2000-08-21
申请人： HITACHI LTD
发明人： OTA KAZUTOSHI , INOUE YOSHIMI , YAMADA KUNIYUKI , HIZUME TATSUYA , MATSUSHIMA HIDEYUKI
IPC分类号： F24F1/00 , F24F11/02 , F25B29/00
摘要： PROBLEM TO BE SOLVED: To suppress the propagation of mold during the period from the rainy season to the summer season by utilizing the dehumidifying function of an air conditioner by effectively controlling the air conditioner based on the growing characteristic of the mold so as to realize energy conservation without giving any trouble to the normal operation of air conditioner for cooling by realizing such a simple operating method that anybody can use. SOLUTION: The hypha of mold actively grows when the relative humidity is >=75% but the growth of the hypha is suppressed in the relative humidity region of

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