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71. 发明专利

JP2001280769A METHOD AND APPARATUS FOR CONTROLLING DEFROSTING OF REVERSIBLE HEAT PUMP DEVICE 失效
公开(公告)号：JP2001280769A
公开(公告)日：2001-10-10
申请号：JP2001073678
申请日：2001-03-15
申请人： CARRIER CORP
发明人： SAID WAHIL , BALLET JOSEPH , DOUZET SYLVAIN SERGE
IPC分类号： F24F11/02 , F25B47/02 , F25B49/00 , F25B49/02
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for controlling a coil defrosting cycle during a heating mode of a reversible heat pump. SOLUTION: The defrosting cycle of the coil 28 of the reversible heat pump 10 is controlled by a control algorithm for monitoring a plurality of values indicating a performance of a clean or non-frosting coil and changing as a time is elapsed by storing the values. A 'frosting rate' changing by the values from 0% indicating the non-frosting coil to 100% indicating a much frosted coil is obtained by using these values. When the rate a predetermined value near the 100%, a refrigerating cycle of the heat pump 10 is inverted (reversed) to realize the defrosting of the coil 28.

72. 发明专利

JP2001280713A METHOD AND APPARATUS FOR CONTROLLING ELECTRONIC EXPANSION VALVE 失效
公开(公告)号：JP2001280713A
公开(公告)日：2001-10-10
申请号：JP2001073675
申请日：2001-03-15
申请人： CARRIER CORP
发明人： PHAM BA-TUNG , CRETIN PASCAL
IPC分类号： F25B1/00 , F25B13/00 , F25B41/06 , F25B49/00
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for controlling an electronic expansion valve for controlling the degree of pinch of a cooler and sustaining the delivery degree of superheat of a compressor used in a refrigerating machine or a heat pump. SOLUTION: An electronic expansion valve EXV for use in the refrigeration cycle 10 of a heat pump or a refrigerating machine is controlled to sustain the degree of pinch at a minimum level so that appropriate heat exchanging performance of a flooded cooler are ensured by monitoring the difference between the fluid temperature CFT and the saturated suction temperature SST of a cooler. In order to protect a compressor 40 against formation of slug from liquid, delivery degree of superheat DSH is monitored. When it is lower than an expected value, opening of the EXV is adjusted. A controller 15 monitors specified variables of an apparatus used for determining the optimal position of the EXV for optimizing the performance of the apparatus, the DSH and the refrigerant load.

73. 发明专利

JP2001227846A REFRIGERATION DEVICE, WORN-PARTICLE DISCRIMINATING DEVICE AND REFRIGERANT OXIDIZATION JUDGING DEVICE 失效
公开(公告)号：JP2001227846A
公开(公告)日：2001-08-24
申请号：JP2000034948
申请日：2000-02-14
申请人： DAIKIN IND LTD
发明人： TAIRA SHIGEJI
IPC分类号： F25B1/00 , F04B39/02 , F25B9/00 , F25B31/00 , F25B43/00 , F25B49/00 , F25B49/02
摘要： PROBLEM TO BE SOLVED: To provide a refrigeration device capable of discriminating a degree of deterioration of oil of a refrigerating machine with a simple configuration and capable of keeping a long-period reliability in operation. SOLUTION: There is provided an oil deterioration discriminating container 31 installed between a four-way changing-over valve 2 and a gas-shutoff valve 24. Since gaseous refrigerant containing a large amount of oil for the refrigerating machine is discharged out of a compressor 1, a degree of deterioration in quality of oil can be easily discriminated.

74. 发明专利

JP2001182666A AIR CONDITIONER 失效
公开(公告)号：JP2001182666A
公开(公告)日：2001-07-06
申请号：JP36969499
申请日：1999-12-27
申请人： TOYODA AUTOMATIC LOOM WORKS
发明人： KIMURA KAZUYA , HIROSE TATSUYA , OTA MASAKI , KAWAGUCHI MASAHIRO , YOKOMACHI HISAYA
IPC分类号： F04B49/06 , B60H1/32 , F04B27/18 , F25B1/00 , F25B1/02 , F25B49/00 , F25B49/02
摘要： PROBLEM TO BE SOLVED: To always effectively operate a heating function in an air conditioner for selectively using either one of a cooling circuit and a heating circuit for holding a variable displacement compressor in common. SOLUTION: A solenoid capacity control valve 43 controls the delivery volume of a variable displacement compressor 25 in response to differential pressure between delivery pressure Pd of a delivery chamber 132 and suction pressure Ps of a suction chamber 131. The capacity control valve 43 receives magnetization and demagnetization control of a control device 59. When turning on a cooling command switch 63, the control device 59 puts a directional control valve 29 in a demagnetization state to perform cooling control accompanying delivery capacity control by the capacity control valve 43. When turning on a heating command switch 64, the control device 59 puts the directional control valve 29 in a magnetization state to perform heating control accompanying the delivery capacity control by the capacity control valve 43.

75. 发明专利

JP2001124295A METHOD AND DEVICE FOR COOLING BOIL-OFF GAS(BOG) 失效
公开(公告)号：JP2001124295A
公开(公告)日：2001-05-11
申请号：JP30921899
申请日：1999-10-29
申请人： TOKYO ELECTRIC POWER CO , NIPPON KOKAN KK
发明人： NAKAYAMA KOJI , OGAWA TOMOTAKA , HOKARI KOICHI , SEN MASAYA , UNE HIROSHI , OKUBO MASAKAZU , JITSUHARA SADAYUKI
IPC分类号： F17C13/00 , F25B41/04 , F25B41/06 , F25B49/00 , F25D3/10
摘要： PROBLEM TO BE SOLVED: To provide a method and device for cooling boil-off gas which ca alleviate change of combustibility as fuel gas and control disturbance even though a mixing ratio of boil-off gas to LNG evaporated gas is changed. SOLUTION: The device is equipped with a heating value detecting device 15 for detecting a heating value of LNG evaporating gas supplied to a facility utilizing LNG, a cooler 10 which ejects an LNG droplet in a heated boil-off gas flow toward the direction thereof so as to cool boil-off gas, an injection quantity regulating valve 14 for regulating the injection quantity of the LNG droplet, a temperature detector 12 for detecting the boil-off gas temperature after boil-off gas is cooled, and a control device 16 which sets the target cooling temperature of the boil-off gas based on a result detected by the heating value detecting device, controls the injection quantity regulating valve so as to set the temperature detected by the temperature detector to the quantity cooling temperature and approximates the heating value of boil-off gas per actual volume to the heating value of the LNG evaporating gas.

76. 发明专利

JP2001090684A SCREW COMPRESSOR AND FREEZING DEVICE 失效
公开(公告)号：JP2001090684A
公开(公告)日：2001-04-03
申请号：JP26848099
申请日：1999-09-22
申请人： DAIKIN IND LTD
发明人： OTSUKA KANAME , YONEDA HIROYUKI
IPC分类号： F04C18/16 , F04C23/00 , F04C28/08 , F04C29/00 , F04C29/04 , F25B1/047 , F25B9/00 , F25B49/00 , F25B49/02 , F04C29/10
摘要： PROBLEM TO BE SOLVED: To provide a screw compressor improved in efficiency in loading with a partial load, and to provide a freezing device showing the effect of an economizer circuit even in a partial load area. SOLUTION: An inverter 22 controls the rotating speed of a motor 27 so as to control the capacity of a screw compressor body 21. Since the screw compressor-? body 21 is not provided with a slide valve, even when loading with a partial load, in the condition that compression chambers C1, C2 are sealed, the coolant is injected to the compression chambers C1, C2 from an economizer passage. Consequently, even if the coolant is injected to the compression chambers C1, C2, capacity of the suction coolant is not reduced. When loading with a partial load, the number of revolution of the motor 27 and the screw rotor 33 are small and cooling effect with the coolant injected from the economizer passage is showed without reducing the capacity of the suction coolant gas to the compression chambers C1, C2, and efficiency when loading with a partial load is improved.

77. 发明专利

JP2001021177A CIRCULATING SYSTEM OF CONSTANT-TEMPERATURE REFRIGERANT LIQUID 失效
公开(公告)号：JP2001021177A
公开(公告)日：2001-01-26
申请号：JP19493799
申请日：1999-07-08
申请人： SMC CORP
发明人： EE YOSHITAKA
IPC分类号： F24F5/00 , F01P9/06 , F25B1/00 , F25B41/06 , F25B49/00 , F25D17/02 , F25D29/00 , F25D31/00
摘要： PROBLEM TO BE SOLVED: To make a refrigerating capacity of a refrigerating circuit changeable and to make a heater for a refrigerant liquid have so small an amount of heat as to be enough only for supplementing external radiation of the refrigerant liquid. SOLUTION: A refrigerating circuit 52 is equipped with an electronic expansion valve 56 having an adjustable valve travel. A refrigerant liquid circuit 53 is equipped with a heat exchanger 25 wherein a refrigerant liquid is cooled by an evaporator 10 of the refrigerating circuit, a refrigerant liquid inlet temperature sensor 59 detecting the temperature of the refrigerant liquid, a heater 60 heating the refrigerant liquid, and a pump 28 supplying the refrigerant liquid to a load 2 and circulating it. A control part 54 is equipped with a controller 63 controlling the electronic expansion valve according to a signal of the temperature sensor 59. The temperature of the refrigerant liquid is maintained by cooling of the refrigerating circuit in the case when external radiation of the refrigerant liquid is little, while the refrigerant liquid is heated by energization of the heater 60 to be maintained at a prescribed temperature when the external radiation is much. The heater 60 can be made to have so small an amount of heat as to be enough only for supplementing the external radiation.

78. 发明专利

JP2001012830A REFRIGERATION CYCLE DEVICE 失效
公开(公告)号：JP2001012830A
公开(公告)日：2001-01-19
申请号：JP18338299
申请日：1999-06-29
申请人： DENSO CORP
发明人： TAKANO YOSHIAKI , IZAWA SATOSHI , ITO HAJIME
IPC分类号： B60H1/22 , B60H1/32 , F25B1/00 , F25B41/04 , F25B49/00 , F25B49/02
摘要： PROBLEM TO BE SOLVED: To protect a compressor against the leakage of a refrigerant in a heating mode by bypassing hot gas. SOLUTION: In the refrigeration cycle device, the discharge side of a compressor 10 is directly connected to the inlet side of an evaporator 18 through a hot gas bypass passage 20, and the evaporator 18 is operated as the radiator of a gas refrigerant and performing in a heating mode by the hot gas bypassing. In this device, physical quantity, for example a high pressure, indicating the condition of the refrigerant being circulated through a hot gas bypass passage 20 in the operation of the heating mode is detected, and it is judged that the refrigerant is insufficient when the high pressure decreases to a refrigerant shortage region, and the compressor 10 is stopped.

79. 发明专利

JP2000356431A METHOD AND APPARATUS FOR CONVERTING LOW QUALITY LEVEL HEAT INTO COOLING LOAD IN INTEGRATED GASIFYING SYSTEM 失效
公开(公告)号：JP2000356431A
公开(公告)日：2000-12-26
申请号：JP2000137902
申请日：2000-05-11
申请人： GEN ELECTRIC
发明人： SEDRIC CHOU , ASHOK KUMAR ANAND , RANASINGHE JATILA , STATT DAVID ANDREW
IPC分类号： F01K17/04 , F01K23/06 , F02C3/28 , F02C7/18 , F25B15/00 , F25B27/02 , F25B49/00
摘要： PROBLEM TO BE SOLVED: To use a cooling load for an auxiliary cooling demand in an integrated gasifying system by recovering an at least low quality level heat from a gas cooler to generate the load in the system. SOLUTION: In the integrated gasifying system, a thermal energy 154 is recovered from a gasifying/carbon removing device 112, and/or a thermal energy 156 is recovered from a gas cooling and/or gas state regulator 116, thereby improving an output of a bottoming cycle. Further, an absorbing cooling cycle 150 is driven by utilizing a low quality level heat 138 from the gas cooling and/or gas state regulator 116. If the heat 138 from the regulator 116 is limited, another low quality level heat can be obtained from a sub-system such as the removing device 112, a waste heat recovering device 162 or the like, and can be used as a heat source of the cycle 150.

80. 发明专利

JP2000346472A SUPERCRITICAL STEAM COMPRESSION CYCLE 失效
公开(公告)号：JP2000346472A
公开(公告)日：2000-12-15
申请号：JP16168799
申请日：1999-06-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： MIZUKAMI HARUNOBU
IPC分类号： F25B1/00 , F25B9/00 , F25B40/00 , F25B41/06 , F25B49/00
摘要： PROBLEM TO BE SOLVED: To regulate the required quantity of circulating refrigerant automatically depending on high side pressure regulation while enhancing the cooling efficiency of a radiator. SOLUTION: The supercritical steam compression cycle comprises a compressor 1, a gas cooler 2 (radiator), a throttling resistor 4a, and an evaporator 4 coupled in series through piping 6 to form a closed circuit operating at supercritical pressure wherein the piping 6 is provided between the gas cooler 2 and the throttling resistor 4a. The supercritical steam compression cycle further comprises a pressure control valve 3 for controlling the delivery pressure of the gas cooler 2 to a target level in order to maximize the coefficient of performance of the supercritical steam compression cycle depending on the refrigerant temperature on the outlet side of the gas cooler 2, a container 5 for storing liquid refrigerant 5a while passing the piping 6 on the outlet side of the evaporator 4, and piping 5b for interconnecting the lower section of the liquid container 5 and the piping 6 between the pressure control valve 3 and the throttling resistor 4a.

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