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71. 发明专利

JP2002174470A FREEZER 失效
公开(公告)号：JP2002174470A
公开(公告)日：2002-06-21
申请号：JP2000373785
申请日：2000-12-08
申请人： DAIKIN IND LTD
发明人： TANIMOTO KENJI , TAKEGAMI MASAAKI , NOMURA KAZUHIDE
IPC分类号： F24F11/02 , F25B13/00 , F25B29/00
摘要： PROBLEM TO BE SOLVED: To enable the operation meeting the various demands of the user, in a freezer which performs both air conditioning and refrigeration. SOLUTION: The freezer (10) is provided with a refrigerant circuit (20) on high temperature side and a refrigerant circuit (25) on low temperature side. In the refrigerant circuit (20) on high temperature side, the first and second indoor circuits (80 and 90), a refrigeration circuit (100), and a cascade circuit (110) on high temperature side are connected to an outdoor circuit (30). In the refrigerant circuit (25) on low temperature side, a cascade circuit (120) on low temperature side and a freezing circuit (130) are connected. A cascade heat exchanger (111) is connected to the cascade circuit (110) on high temperature side and the cascade circuit (120) on low temperature side. A controller (200) is constituted so that it can execute the first to thirteenth control actions. The control action that the controller (200) executes is selected by operating an action changeover switch (250).

72. 发明专利

JP2002071225A REFRIGERATING DEVICE 失效
公开(公告)号：JP2002071225A
公开(公告)日：2002-03-08
申请号：JP2000254217
申请日：2000-08-24
申请人： DAIKIN IND LTD
发明人： TAKEGAMI MASAAKI , WADA TERUBUMI
IPC分类号： F25B1/00 , F25B5/02
摘要： PROBLEM TO BE SOLVED: To enable lowering of a temperature of a discharge refrigerant as operation of a compressor is continued and secure reliability of a compressor as cooling operation is continued. SOLUTION: A chilling unit (10) is provided with a refrigerant circuit (20), a first circuit (50), a second circuit (60), and a controller (80). The refrigerant circuit (20) is provided with a first evaporator (23) and a second evaporator (24). In the refrigerant circuit, refrigerating cycle is effected, and cooled first and second brine are fed to the utilizing side. Further, the refrigerant circuit (20) is provided with a liquid refrigerant introduction pipe (34) and a third expansion valve (E3). When the discharge refrigerant temperature of a compressor (21) exceeds 110 deg.C, the controller (80) opens the third expansion valve (E3) and a refrigerant is fed to the suction side of the compressor (21) through the liquid refrigerant introduction pipe (34).

73. 发明专利

JP2001280723A REFRIGERATING DEVICE 失效
公开(公告)号：JP2001280723A
公开(公告)日：2001-10-10
申请号：JP2000092701
申请日：2000-03-30
申请人： DAIKIN IND LTD
发明人： TANIMOTO KENJI , UENO AKITOSHI , MESAKI TAKEMUNE , UENO TAKEO , NOMURA KAZUHIDE , TAKEGAMI MASAAKI
IPC分类号： F25B5/02
摘要： PROBLEM TO BE SOLVED: To effectively utilize the capacity of a compressor (22) of a unit (11) on the heat source side and further to improve the reliability of a compressor (22). SOLUTION: In a refrigerating device constituted that a refrigerating unit (13), a deep freezing unit (14), and an indoor air-conditioning unit (18) are connected, in parallel, to an outdoor unit (11), having a compressor (22), by a refrigerant circuit (20), control is executed that the units (13 and 14) on the main utilizing side are operated prior to the indoor air-conditioning unit (18).

74. 发明专利

JP2001241789A TWO-REFRIGERANT REFRIGERATOR 失效
公开(公告)号：JP2001241789A
公开(公告)日：2001-09-07
申请号：JP2000052923
申请日：2000-02-29
申请人： DAIKIN IND LTD
发明人： UENO AKITOSHI , UENO TAKEO , MESAKI TAKEMUNE , TAKEGAMI MASAAKI
IPC分类号： F25D11/00 , F25B5/02 , F25B7/00
摘要： PROBLEM TO BE SOLVED: To appropriately maintain the feed rate of a high temperature refrigerant to cascade condensers in a two-refrigerant refrigerator with a high temperature refrigerant circuit simplified. SOLUTION: Two refrigerating circuits (50a, 50b) and one cascade circuit (60) are connected in parallel to with an outdoor circuit (30) to constitute the high temperature refrigerant circuit (20), refrigerating units (13a, 13b) respectively house refrigerating evaporators (53a, 53b) of the refrigerating circuits (50a, 50b), an intermediate heat exchanger (66) is connected to the cascade circuit (60) with a cascade expansion valve (61) provided at the upstream of this heat exchanger (66), the opening of the cascade expansion valve (61) is adjusted, based on the outlet refrigerant temperature of the heat exchanger (66), a low temperature refrigerant circuit (70) is connected to the heat exchanger (66), and two refrigerating evaporators (76a, 76b) are parallel connected to the low temperature refrigerant circuit (70) and housed in the refrigerating units (14a, 14b), respectively.

75. 发明专利

JP2001033113A REFRIGERATION SYSTEM 失效
公开(公告)号：JP2001033113A
公开(公告)日：2001-02-09
申请号：JP20606499
申请日：1999-07-21
申请人： DAIKIN IND LTD
发明人： UENO AKITOSHI , MESAKI TAKEMUNE , UENO TAKEO , TAKEGAMI MASAAKI
IPC分类号： F25B1/00
摘要： PROBLEM TO BE SOLVED: To obtain a refrigeration system mounting a plurality of compressors having different capacity in which refrigerating machine oil can be returned surely back to respective compressors. SOLUTION: Suction line X of each compressor 1A, 1B,... having different capacity is provided with a mechanism Z for returning the refrigerating machine oil, separated from suction gas refrigerant, preferentially to a compressor 1A having lowest capacity and a passage 17 for returning refrigerating machine oil, separated by an oil separator 16 provided in the delivery piping 15 of the compressors 1A, 1B,..., to the compressor 1A having lowest capacity. After the refrigerating machine oil separated by the oil separator 16 and the refrigerating machine oil in suction gas refrigerant are returned preferentially to the compressor 1A having lowest capacity, the refrigerating machine oil is returned sequentially from the compressor 1A back to the compressors 1B, 1C,... having lower inner pressure of a dome by the inner pressure difference of the dome.

76. 发明专利

JPH1019394A AIR CONDITIONER 失效
公开(公告)号：JPH1019394A
公开(公告)日：1998-01-23
申请号：JP16912296
申请日：1996-06-28
申请人： DAIKIN IND LTD
发明人： UENO TAKEO , TAKEGAMI MASAAKI , ARAI TAKESHI , WATANABE SHINICHI , KACHI TORU , MIYAKE DAISUKE , HARA MASAKANE , KITANO MOICHI
IPC分类号： F24F11/02 , F25B1/00
摘要： PROBLEM TO BE SOLVED: To provide an air conditioner capable of preventing a refrigerant on a suction side of a compressor from being lacked when operation is restarted after being once interrupted, and hence failure interruption is prevented from being produced. SOLUTION: A closed refrigerant circuit is provided which includes a compressor 4, a condenser 5, an expansion valve 6, and an evaporator 3 in this order. In operation, the compressor 4 is driven in the state where the expansion valve 6 is set to a predetermined opening based upon a control signal outputted from a control part 11, and hereby the refrigerant is circulated along the refrigerant circuit to release heat from the refrigerant to the outside with the aid of the condenser 5 while heat is incorporated into the refrigerant from the outside with the aid of evaporator 3. When the control part 11 issues an interruption command for interruption of the operation, the expansion valve 6 is set to a larger opening than that before the issuance of the interruption command for a predetermined time, and then interruption of the compressor 4 and full close of the expansion valve 6 are simultaneously executed.

77. 发明专利

JPH1019391A CONTROLLER FOR AIR CONDITIONER 失效
公开(公告)号：JPH1019391A
公开(公告)日：1998-01-23
申请号：JP16974496
申请日：1996-06-28
申请人： DAIKIN IND LTD
发明人： UENO TAKEO , TAKEGAMI MASAAKI , ARAI TAKESHI , WATANABE SHINICHI , KACHI TORU , MIYAKE DAISUKE , HARA MASAKANE , KITANO MOICHI
IPC分类号： F24F11/02 , F25B1/00
摘要： PROBLEM TO BE SOLVED: To provide a controller for air conditioner capable of COP(coefficient of performance) control that makes maximum a result coefficient and capability control that makes maximum capability. SOLUTION: The present controller of an air conditioner includes a control board 11, a suction temperature sensor 15 for detecting temperature of suction air of an indoor machine 6, and an exhaust gas temperature sensor 12 and an outlet refrigerant temperature sensor 13. The control board 11 achieves capability control when temperature detected by the suection temperature sensor 15 is higher than a set value by 2 deg.C or more while achieving COP control when a difference between the temperature detected by the suction temperature sensor 15 and a set value is 2 deg.C or less. The foregoing capability control is achieved by controlling an opening of an expansion valve 15 and controlling superheat of discharge gas while the COP control is achieved by controlling the opening of the expansion valve 5 to control superheat of a refrigerant at the outlet of the evaporator 1. The respective capability control and superheat for the COP control are stored in a memory 11b.

78. 发明专利

JPH0921577A MOTOR DRIVEN EXPANSION VALVE CONTROLLER FOR AIR CONDITIONER 失效
公开(公告)号：JPH0921577A
公开(公告)日：1997-01-21
申请号：JP16962095
申请日：1995-07-05
申请人： DAIKIN IND LTD
发明人： YONEDA YUJI , YAMAMOTO MASAKI , TAKEGAMI MASAAKI
IPC分类号： F24F11/02 , F25B47/02
摘要： PROBLEM TO BE SOLVED: To improve the rising at the time of hot starting by providing a motor driven expansion valve opening setter for so setting the opening of the motor driven expansion valve of an air conditioner as to accelerate the rising at the time of hot starting from the frosting time stored in a frost information storage unit. SOLUTION: The motor driven expansion valve controller 20 comprises a relative ratio calculator 21, a correcting opening setter 22, a motor driven expansion valve setter 23 and a frost information storage unit 24. The unit 24 stores a previous frosting time Tfn-1 and a motor driven expansion valve opening Pn-1 at the time of previous hot starting. The calculator 21 calculates a relative ratio α from the frosting time of a defrosting controller 27 and previous frosting time Tfn-1 . The setter 23 sets the correcting opening P from the ratio α and the discharge tube temperature Tdn at the time of finishing the this time defrosting, sets the motor driven expansion valve opening Pn , and improves the rising of hot starting.

79. 发明专利

JPH06272931A AIR CONDITIONING APPARATUS 失效
公开(公告)号：JPH06272931A
公开(公告)日：1994-09-27
申请号：JP6548893
申请日：1993-03-24
申请人： DAIKIN IND LTD
发明人： MIYATA KENJI , TSUJII HIDEKI , OKA SHINICHI , SUMIDA TETSUYA , TAKEGAMI MASAAKI
IPC分类号： F24F11/02 , F25B1/00 , F25B49/02
摘要： PURPOSE:To enable a room control unit to recognize operating condition of an outdoor unit with respect to an air conditioning apparatus in which the outdoor control unit receives information from the room control unit according to a change in the waveform of a supply current of a power source line by abolishing a transmission line between the outdoor control unit and the room control unit to obtain a power source of the room unit from an outdoor power source. CONSTITUTION:In an air conditioning apparatus in which an outdoor control unit 2A receives information from a room control unit 3A according to a change in the waveform of a supply current of a power source line 7 with the turning ON or OFF of a room fan motor 3F, a heat exchange temperature in a room is compared with a room temperature to let the room control unit 3A recognize abnormal stoppage of the outdoor unit or the starting or ending of a defrosting operation thereof and the room unit is operated according to operating condition of the outdoor unit.

80. 发明专利

JPH0611174A OPERATION CONTROL DEVICE FOR AIR CONDITIONER 失效
公开(公告)号：JPH0611174A
公开(公告)日：1994-01-21
申请号：JP16901592
申请日：1992-06-26
申请人： DAIKIN IND LTD
发明人： SUMIDA TETSUYA , TAKEGAMI MASAAKI
IPC分类号： F24F11/02 , F25B1/00
摘要： PURPOSE:To improve an air conditioning capacity by a method wherein a saturation temperature corresponding to a condensing pressure is approached to an upper limit set value under a high load. CONSTITUTION:Saturation temperature sensing means Thc and The detect a saturation temperature corresponding to a condensing pressure of a refrigerant circuit 9. As the saturation temperature corresponding to the condensing pressure becomes an upper limit set value, a volume reducing means 12 outputs a decreasing signal to a volume control means 11 and then the volume control means 11 decrease the volume of a compressor 1. After this operation, as the saturation temperature corresponding to the condensing pressure is lowered than the upper limit set value, the increasing allowing means 13 outputs an allowing signal for increasing the volume of the compressor 1 to the volume control means 11, and then the volume control means 11 increase the volume of the compressor 1 until the saturation temperature corresponding to the condensing pressure reaches the upper limit set value through this allowing signal. With such an arrangement as above, it is possible to realize effectively the air conditioning capability corresponding to the air conditioning load.

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