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公开(公告)号：JPH0914800A
公开(公告)日：1997-01-17
申请号：JP16040195
申请日：1995-06-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANAKA MASAAKI , KINO AKIHIRO , SHIMIZU TAKESHI
Abstract: PURPOSE: To provide a refrigerating system reducing the noise of a header and improving the reliability of a compressor in the system for allowing refrigerating machine oil and refrigerant to two-phase separate in the header. CONSTITUTION: The refrigerating system comprises a compressor 1, a condenser 2, an expansion mechanism 3, an evaporator 4, and a header 5 annularly connected, refrigerant and refrigerating machine coil having no or small mutual solubility with the refrigerant. The header 5 connects above the suction tube 6 of the compressor 1, and inserts the outlet tube 9 of the evaporator 4 and an oil return tube 10 from below. The tube 10 is opened at one end within the header 5, and connected at the other to the suction tube 6 of the compressor 1.
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公开(公告)号：JP2517046B2
公开(公告)日：1996-07-24
申请号：JP3819088
申请日：1988-02-19
Applicant: MATSUSHITA REFRIGERATION
Inventor： KINO AKIHIRO , YONEDA HIROSHI , YAMADA HIROYOSHI
IPC: F25B13/00
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公开(公告)号：JPH07120130A
公开(公告)日：1995-05-12
申请号：JP26331893
申请日：1993-10-21
Applicant: MATSUSHITA REFRIGERATION
Inventor： KINO AKIHIRO
Abstract: PURPOSE:To prevent liquid compression due to flow of liquid refrigerant from a compressor to an evaporator at the time of starting the compressor after defrosting of a refrigerant is finished. CONSTITUTION:The refrigerator comprises a body 1 having a cold storage chamber 3 and a refrigerating chamber 4 formed by dividing its interior by a partition 2 by installing a refrigerating cycle in which a compressor 9, a condenser 10, a capillary tube 11 and an evaporator 12 are sequentially annularly connected, and an indoor fan 16 for heat exchanging the evaporator 12 with the air in the body 1. Further, the refrigerator comprises a defrosting heater 14 installed near an air suction side of the evaporator 12, defrost end sensing means for sensing defrost end of the evaporator 12, and defrost control means for starting the fan 16 simultaneously upon stopping energization of the heater 14 according to an output of the sensing means, starting the compressor 9 after a predetermined time and starting an ordinary operation.
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公开(公告)号：JPH05223386A
公开(公告)日：1993-08-31
申请号：JP2768292
申请日：1992-02-14
Applicant: MATSUSHITA REFRIGERATION
Inventor： KINO AKIHIRO , KITAYAMA HIROSHI , TAKATANI TAKAYUKI
Abstract: PURPOSE:To optimize a capacity control of an outdoor heat exchanger at the time of operating a room cooling main body and to enhance comfortableness by a capacity control of a room heating of a driven indoor unit. CONSTITUTION:The multiroom type air conditioner comprises discharge pressure sensing means 62 for sensing a discharge pressure of a variable capacity compressor, outdoor fan discharge pressure control means 75 for calculating a rotating speed of an outdoor fan according to the sensed discharge pressure, an outdoor motor-driven expansion valve discharge pressure control means 76 for calculating openings of first, second outdoor motor-driven expansion valves, and fuzzy inference means 74.
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公开(公告)号：JPH0571824A
公开(公告)日：1993-03-23
申请号：JP23146191
申请日：1991-09-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： TAKATANI TAKAYUKI , KITAYAMA HIROSHI , KINO AKIHIRO
Abstract: PURPOSE:To prevent a liquid refrigerant from gathering in a connection piping by a method wherein first and second connection pipings are interconnected through a bypass piping in which a flow rate control device is located and a heat-exchange part to effect heat-exchange between an expansion valve on the indoor side and that on the outdoor side located in the respective connection pipings is arranged in the bypass piping. CONSTITUTION:A part of a refrigerant delivered from a compressor 2 is condensed and liquefied by a heat-exchanger 4 on the outdoor side through a three- way valve 3 and guided through an expansion valve 5 on the outdoor side to a connection piping 13. The refrigerant flows through an expansion valve 7 on the indoor side to each indoor heat-exchanger 8 and after the refrigerant is vaporized for gasification, the gasified refrigerant is guided through a second solenoid valve 10 to a second connection piping 12. The rest is guided through a first connection piping 11 to a bypass piping 14. Thereafter, the rest is guided through an on-off device 15, a flow rate control device 16, and a heat-exchange part 17 to the second connection piping 12. This constitution prevents a refrigerant from gathering in the first connection piping 11.
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Patent Agency Ranking
公开(公告)号：JPH04217755A
公开(公告)日：1992-08-07
申请号：JP40278790
申请日：1990-12-17
Applicant: MATSUSHITA REFRIGERATION
Inventor： NAKAGAWA NOBUHIRO , KITAYAMA HIROSHI , KINO AKIHIRO , FUJIMOTO RYUZO , TAKATANI TAKAYUKI
Abstract: PURPOSE:To ensure cooling capacity proper to all indoor machines by a method wherein even during a long piping and when an indoor machine and an outdoor machine are installed with a difference in a level, the degree of overcooling during cooling operation is controlled. CONSTITUTION:Degree of overcooling detecting means 21a and 21b to detect the degree of overcooling of a liquid refrigerant and a liquid gas heat exchanger 15 to perform heat exchange between a liquid refrigerant and a gas refrigerant are disposed in the vicinity of expansion valves 8a and 8b on the indoor side. Further, a degree-of-overcooling judging means 18 to measure the magnitude of the degree of overcooling through comparison of output signals from the degree of overcooling detecting means 21a and 21b and an expansion valve drive means 19 on the outdoor side to drive an expansion valve 5 on the outdoor side based on an output signal from the degree of overcooling judge means 18 are provided.
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公开(公告)号：JPH04190057A
公开(公告)日：1992-07-08
申请号：JP32357890
申请日：1990-11-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： KINO AKIHIRO , HAYASHI TAKAHIRO
Abstract: PURPOSE:To enable a smooth capability control to be carried out even in the case that an indoor load is different by a method wherein a range of a degree of opening of an outdoor electric expansion valve is determined in response to an operating frequency and the outdoor electric expansion valve is controlled within the range of degree of opening with a degree of overheating of refrigerant being applied as an input. CONSTITUTION:During a heating operation, an operating frequency F of a variable capability compressor 12 is determined in response to a discharging pressure P1 and a target discharging pressure value PR. A degree of opening UO of an outdoor electric expansion valve 15 is calculated in response to an superheating degree SH of the refrigerant and the target superheating degree SHR of the refrigerant. A degree of opening of each of indoor electric expansion valves 18A and 18B is determined in response to room temperature T1, T2 and target indoor temperature values TR1 and TR2. An inverter compressor 12 is operated at a determined frequency F. In concurrent with this operation, an outdoor electric expansion valve control means determines an upper limit UMAX(F) and a lower limit UMIN(F) of a degree of opening U of the expansion valve 15 at the frequency F in reference to an equation I and further it determines the degree of opening U in reference to an equation II. In this way, even in the case that the operating frequency F of the compressor 12 is substantially varied due to a variation in indoor load, the degree of opening U of the valve is varied within a range of the degree of opening of the most appropriate expansion valve 15 without waiting any variation of the superheating degree SH of the refrigerant, resulting in that the freezing cycle is stabilized fast.
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公开(公告)号：JPH04190055A
公开(公告)日：1992-07-08
申请号：JP32357390
申请日：1990-11-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： FUJIMOTO RYUZO , KITAYAMA HIROSHI , KINO AKIHIRO , NAKAGAWA NOBUHIRO , TAKATANI TAKAYUKI
IPC: F25B13/00
Abstract: PURPOSE:To prevent a heating capability from being reduced caused by over-throttling of an outdoor electric expansion valve by a method wherein the outdoor electric expansion valve is once opened to a predetermined degree of opening in response to a variation of outer air temperature or an operating horsepower of an indoor unit. CONSTITUTION:In a case that a multi-chamber type air conditioner is operated for example under a predetermined pressure of 16kg/cm , an outer air temperature of 7 deg.C and an operting horsepower of 1 horsepower, a set temperature of refrigerant is determined to 11.2 deg.C and a temperature of refrigerant is equal to a set temperature of refrigerant at a degree of opening of an outdoor electric expansion valve 5 being 200 steps. An operting horsepower is 5 horsepower, a set temperature of the refrigerant is changed to 3.7 deg.C and then a control is carried out in such a way as the expansion valve 5 is once opened up to a predetermined degree of opening (300 steps in this case). Then, a condensing pressure is decreased and a sensing pressure is lowered below a predetermined pressure 16kg/cm , and an inverter controller 13 instructs a variable capability compressor 2 to increase the operating frequency. Also in the case that the outer air temperature is varied, a similar operation as described above will be carried out. Accordingly, even in the case that the operating horsepower or the outer air temperature is varied, a reduction in capability caused by over-throttling of the expansion valve 5 is prevented.
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公开(公告)号：JPH04187953A
公开(公告)日：1992-07-06
申请号：JP31584590
申请日：1990-11-22
Applicant: MATSUSHITA REFRIGERATION
Inventor： KINO AKIHIRO
Abstract: PURPOSE:To perform capacity control corresponding to the load inside a room for improving the comfort by a method wherein the manipulated variable of an motor-driven outdoor expansion valve is decided and controlled using fuzzy reasoning and according to inputs consisting of the supercooling degree of refrigerant before the motor-driven outdoor expansion valve and the superheating degree of refrigerant at the suction of a variable capacity compressor. CONSTITUTION:During heating operation, a refrigerant supercooling degree detector 17 detects the supercooling degree of refrigerant just before a motor- driven outdoor expansion valve 5. A refrigerant superheating degree detector 16 detects the supercooling degree of refrigerant at the suction of a variable capacity compressor 2. The detected superheating degree and supercooling degree are input to a fuzzy inference device 20. The fuzzy inference device 20 takes out a control rule stored in a memory 19, calculates the valve travel of the motor-driven outdoor expansion valve 5 according to fuzzy inference and outputs the calculated valve lift to a motor-driven outdoor expansion valve controller 18.
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公开(公告)号：JPH04187930A
公开(公告)日：1992-07-06
申请号：JP31860390
申请日：1990-11-22
Applicant: MATSUSHITA REFRIGERATION
Inventor： TAKATANI TAKAYUKI , KITAYAMA HIROSHI , KINO AKIHIRO , NAKAGAWA NOBUHIRO , FUJIMOTO RYUZO
Abstract: PURPOSE:To make it possible to carry out the optimum system operation based on each horsepower by changing setting values including not only open air temperature, pipe length but also operation horsepower. CONSTITUTION:Both remote controllers 22a and 22b or one of the controllers are turned on so that the operation may start. Then, when outdoor air temperature is detected with an open air detector 9 while pipe length is decided with a pipe length detector 23. An operation horsepower detector 24 is adapted to decide the operation horsepower based on ON/OFF signals transmitted from the remote controllers 22a and 22b while the preset pressure detector 25 detects the setting high pressure predetermined based on open air temperature, pipe length and operation horsepower. Then, a pressure detector 8 detects a high pressure side pressure and a differential pressure computing element 26 computes the difference between the detected pressure and the setting pressure. A competence control decision means 27 is capable of controlling the frequency of an inverter 2, responding to the differential pressure and operating the optimum system operation.
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