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公开(公告)号：AU3606701A
公开(公告)日：2002-05-21
申请号：AU3606701
申请日：2001-03-02
Applicant: MATSUSHITA REFRIGERATION
Inventor： YUASA MASASHI , UEMURA SHUZO , YAMADA HIROSHI , FUKUI HIDEKI , HAMANO YASUKI , YOKOYAMA NAOKI
Abstract: Respective evaporators are set to a proper value in evaporation temperature and the efficiency in refrigeration cycle is enhanced, resulting in a reduction of energy consumption. A refrigerating unit and a refrigerator comprise a compressor, a condenser, a plurality of evaporators connected in series, a refrigerant flow rate adjustable unit and a refrigerant, thereby constituting a refrigeration cycle. The refrigerant flow rate adjustable unit controls each respective evaporation temperature of the plurality of evaporators. Preferably, the refrigeration unit further comprises a bypass circuit bypassing at least one of the plurality of evaporators and, when needs arise, the refrigerant is channeled through the bypass circuit. The refrigerant flow rate adjustable unit controls a flow rate of the refrigerant such that an evaporation temperature of the respective evaporators located at the upstream side of the refrigeration cycle is made higher than an evaporation temperature of the respective evaporators located at the downstream side thereof.
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公开(公告)号：EP1344997A4
公开(公告)日：2005-11-16
申请号：EP01908271
申请日：2001-03-02
Applicant: MATSUSHITA REFRIGERATION
Inventor： YUASA MASASHI , KAMIMURA SHUZO , YAMADA HIROSHI , FUKUI HIDEKI , HAMANO YASUKI , YOKOYAMA NAOKI
CPC classification number: F25B5/04 , F25B5/00 , F25B2700/2117 , F25D11/022 , F25D17/065 , F25D29/00 , F25D2317/0682 , F25D2400/04 , F25D2400/30 , F25D2700/12 , F25D2700/122
Abstract: The respective evaporators have proper evaporation temperatures to improve the freezing cycle efficiency, resulting in the reduction of energy consumption. The freezer and refrigerator are provided with a compressor, a condenser, a plurality of series-connected evaporators, a refrigerant flow rate changing device, and a refrigerant, these forming a refrigerating cycle. The refrigerant flow rate changing device controls respective evaporation temperatures for the plurality of evaporators. Desirably, the freezer further includes a bypass circuit which bypasses at least one evaporator, and the refrigerant passes through the bypass circuit as needed. The refrigerant flow rate changing device controls the flow rate of the refrigerant such that the evaporation temperatures for the evaporators positioned on the upstream side of the refrigerating cycle are higher than those for the evaporators positioned on the downstream side.
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公开(公告)号：JP2002130912A
公开(公告)日：2002-05-09
申请号：JP2000330250
申请日：2000-10-30
Applicant: MATSUSHITA REFRIGERATION
Inventor： YAMAMOTO HARUYOSHI , HAMANO YASUKI
Abstract: PROBLEM TO BE SOLVED: To provide a refrigerator which is contrived to improve the heat transmission efficiency of a suction pipe and, at the same time, to improve the cooling efficiency of a refrigerating cycle having a plurality of coolers. SOLUTION: Since grooves 23 are provided on the internal surface of the suction pipe 20, the heat transfer rate of a refrigerant is improved and the dryness of the refrigerant at the outlet of the suction pipe 20 becomes smaller when heat exchange is made between a capillary tube 21 and the suction pipe 20. Consequently, latent heat of vaporization having a broad width is obtained. In addition, a means which reduces the volume of a connecting pipe 24 connecting the first and second coolers 12 and 14 to each other is provided so as to prevent the insufficient circulation of a liquid refrigerant by reducing the stagnating quantity of the refrigerant in the pipe 24.
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公开(公告)号：JP2000266444A
公开(公告)日：2000-09-29
申请号：JP6638799
申请日：1999-03-12
Applicant: MATSUSHITA REFRIGERATION
Inventor： HAMANO YASUKI , KIMURA YOSHITO , SAITO TETSUYA
Abstract: PROBLEM TO BE SOLVED: To obtain a cooling system for cooling a refrigeration compartment and a freezing compartment independently in which the quantity of refrigerant is reduced while enhancing the efficiency and the reliability is enhanced by preventing extremely low pressure operation of a compressor. SOLUTION: Immediately before switching the cooling operation from a freezing compartment 6 to a refrigeration compartment 4 and immediately before the refrigeration compartment 4 is cooled after starting a compressor 1, the compressor 1 is operated (pump down) for a predetermined time while closing both first and second on/off valves 10, 11 to purge a refrigerant standing in a second evaporator 5 to the condenser 2 side (high pressure side). Subsequently, the first on/off valve 10 is opened and cooling operation of the refrigeration compartment 4 is started.
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公开(公告)号：JP2000266443A
公开(公告)日：2000-09-29
申请号：JP6639099
申请日：1999-03-12
Applicant: MATSUSHITA REFRIGERATION
Inventor： HAMANO YASUKI , KIMURA YOSHITO , SAITO TETSUYA
IPC: F25D11/02
Abstract: PROBLEM TO BE SOLVED: To obtain a cooling system for cooling a refrigeration compartment and a freezing compartment independently in which the quantity of refrigerant is reduced while enhancing the efficiency and the reliability is enhanced by preventing extremely low pressure operation of a compressor. SOLUTION: Immediately before switching the cooling operation from a freezing compartment 6 to a refrigeration compartment 4 and from the refrigeration compartment 4 to the freezing compartment 6, a compressor 1 is operated (pump down) for a predetermined time while closing both first and second on/off valves 10, 11 to purge a refrigerant standing in a first or second evaporator 3, 5 to the condenser 2 side (high pressure side). Subsequently, the first or second on/off valve 10, 11 is opened and cooling operation of the refrigeration compartment 4 or the freezing compartment 6 is started.
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Patent Agency Ranking
公开(公告)号：JPH1026461A
公开(公告)日：1998-01-27
申请号：JP18035796
申请日：1996-07-10
Applicant: MATSUSHITA REFRIGERATION
Inventor： KANEOKA SHINICHI , NODA TOSHINORI , HAMANO YASUKI
Abstract: PROBLEM TO BE SOLVED: To permit energy saving and retaining high-quality freshness of food by a method wherein the frost deposit condition of an evaporator is decided by the temperature of the evaporator and when the amount of deposited frost is small, defrosting is finished at that time and the operation is controlled so as to return usual cooling operation, however, the operation is not introduced into defrosting mode and the cooling operation is effected successively when the frost is not deposited to the evaporator substantially. SOLUTION: A freezing refrigerator is constituted of a temperature detecting means 17, attached to the evaporator 3 of a cooling system through thermal contact, and a temperature changing rate operating means 18, operating the changing rate of temperature based on the output of the temperature detecting means 17. The freezing refrigerator is controlled so as to be released from defrosting operation and introduced into a normal cooling operation mode only when the changing rate of temperature during defrosting is higher than a preset value while normal defrosting operation is effected when there is a possibility of mistaken detection of the amount of deposited frost.
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公开(公告)号：JPH09113087A
公开(公告)日：1997-05-02
申请号：JP27268395
申请日：1995-10-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： MORISHITA KENICHI , ODA MASATAKA , KURIMOTO KAZUNORI , HAMANO YASUKI , NODA TOSHINORI , KUBOTA YOSHITAKA , ENDO KATSUMI , KANEOKA SHINICHI , KAMITSUJI TOSHIO
Abstract: PROBLEM TO BE SOLVED: To reduce the thermal load of a compressor by so controlling to vary the number of revolutions of a fan motor for cooling the compressor when the temperature of a discharge tube rises. SOLUTION: The indoor temperature input to control means 12 is compared with a set temperature, and the number of revolutions of a fan motor for cooling a compressor is decided. Then, the output of discharge tube temperature detecting means 11 is input by the input terminal 15 of the control means 12. Whether the discharge tube temperature is a predetermined value or not is judged, and if it is the predetermined value or more, the number of revolutions of the motor for cooling the compressor is altered, while if it is less than the predetermined value, the alteration of the number of revolutions of the motor for cooling the compressor is released. Then, the decided number of revolutions of the motor for cooling the compressor is output, and then whether the defrosting operation is started or not is judged. If the defrosting operation is started, the output of a compressor rotation command from the output terminal 01 is set to '0' rotation, and the rotation command of the motor for cooling the compressor from the output terminal 01 is set to '0' rotation. A relay 8 is turned ON to supply a current to a heater 9.
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公开(公告)号：JPH08285426A
公开(公告)日：1996-11-01
申请号：JP8813195
申请日：1995-04-13
Applicant: MATSUSHITA REFRIGERATION
Inventor： MORISHITA KENICHI , NODA TOSHINORI , ONISHI YASUTOMO , YAMAMOTO HARUYOSHI , HAMANO YASUKI , KANEOKA SHINICHI , KUBOTA YOSHITAKA
Abstract: PURPOSE: To reduce a consumption power of a refrigerator by a method wherein a flow rate of refrigerant is adjusted in such a way that a requisite minimum flow rate of refrigerant required for preventing dew formation may be flowed so as not, to provide heating more than that required for a condenser to prevent dew formation of a refrigerator. CONSTITUTION: This refrigerator is comprised of a bypass pipe 6 for bypassing a dew formation preventing condenser 2b, a pressure sensing device for sensing a pressure within the dew formation preventing condenser 2b and a refrigerant flow rate distributing device 7 for distributing a flow rate of refrigerant flowing in the bypass pipe 6 in response to an output of the pressure sensing device.
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公开(公告)号：JPH06123525A
公开(公告)日：1994-05-06
申请号：JP27406192
申请日：1992-10-13
Applicant: MATSUSHITA REFRIGERATION
Inventor： UMEOKA IKUTOMO , KAMITSUJI TOSHIO , HAMANO YASUKI , FUJIWARA NORIYUKI
Abstract: PURPOSE:To enable effect of noise suppressing not to be decreased by a method wherein a connecting pipe length is set to a specified length. CONSTITUTION:A pressure pulsation generated within a cylinder 7 is attenuated in the case that a first noise suppressing device 12 and a second noise suppressing device 13 constructed by a recessed part and a discharging chamber 10a as well as the chamber may act as an expansion type noise suppressing device and then refrigerant passes through discharging chambers 10a and 13a. In this case, as the length of a connected pipe 11 is set to a length satisfying equations I and II, it is possible to increase weight or decrease weight of acoustic mass of the connecting pipe 11 in respect to an air column resonance mode generated between the first noise suppressing device 12 and the second noise suppressing device 13 and then an air column resonance frequency is moved out of a low range or a wide range resonance. Due to this fact, it is possible to make a positive avoidance of the air column resonance frequency from a pressure pulsation basic frequency and further to prevent a reduction of an effect of noise suppressing at frequencies near the fundamental frequency.
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公开(公告)号：JP2003207250A
公开(公告)日：2003-07-25
申请号：JP2002370369
申请日：2002-12-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIMURA YOSHITO , SHIMOMURA NOBUO , HAMANO YASUKI , SAITO TETSUYA
Abstract: PROBLEM TO BE SOLVED: To reduce a refrigerant quantity, and to enhance efficiency in a cooling cycle using a combustible refrigerant. SOLUTION: A closed loop is formed of a compressor 12, a condenser 2, a passage control means 13, a first pressure reducing means 7, and a first evaporator 3. A second pressure reducing means 8 and a second evaporator 5 are connected so as to become parallel to the first pressure reducing means 7 and the first evaporator 3. Since cooling is performed by alternately switching the two evaporators 3 and 5 by the cooling cycle for arranging the passage control means 13 on the inlet side of the first pressure reducing means V and the second pressure reducing means 8, pipe capacity of a cooling system and the refrigerant quantity can be reduced more than a cooling system for performing cooling by one evaporator and a cooling system for performing cooling by flowing the refrigerant in parallel to a plurality of evaporators. COPYRIGHT: (C)2003,JPO
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