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公开(公告)号：JP2002195733A
公开(公告)日：2002-07-10
申请号：JP2000391960
申请日：2000-12-25
Applicant: MATSUSHITA REFRIGERATION
Inventor： HYODO AKIRA , HAMANO YASUKI , YAMADA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To solve the problems of the conventional refrigerator, such as that a liquid refrigerant whose pressure has dropped a little with a three-way valve for switching the refrigerant passages to a plurality of evaporators is heated, that a flash gas is generated in front of a depressurizing means, that the circulation of the refrigerant is hindered, and that the freezing capacity drops remarkably, concerning a refrigerator where a refrigeration chamber and a freezing chamber are severally equipped with coolers. SOLUTION: A compressor 6, a condenser 7, a first depressurization means 10, a refrigeration chamber cooler 9, an expansion valve 20, and a freezing chamber cooler 11 are connected in the order, and a freezing cycle is composed of this line and a bypass path provided with a second depressurization means 12, which connects a shunt connection 19 provided between the first depressurization means 10 and the refrigeration chamber 9 with a confluence connection 21 provided between the expansion valve 20 and the freezing chamber cooler 9, and the confluence connection part 19 is provided within the refrigeration chamber 2, whereby this refrigerator can keep the surroundings of the shunt connection 19 at a low temperature.
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公开(公告)号：JP2002147917A
公开(公告)日：2002-05-22
申请号：JP2000343294
申请日：2000-11-10
Applicant: MATSUSHITA REFRIGERATION
Inventor： YUASA MASASHI , KAMIMURA SHUZO , YAMADA HIROSHI , FUKUI HIDEKI , HAMANO YASUKI , YOKOYAMA NAOKI
Abstract: PROBLEM TO BE SOLVED: To provide highly efficient refrigerating equipment and a refrigerator provided with the equipment, in which evaporation temperatures of a plurality of evaporators can be variably controlled, temperature variation in a cooling chamber is small. SOLUTION: A refrigerating cycle is constituted by providing a compressor 301, a condenser 302, a first evaporator 304 and a second evaporator 305 connected serially to each other, a refrigerant flow variable controller 306 such as a motorized expansion valve provided between the evaporators 304 and 305. Further, a bypass circuit 307 bypassing the evaporator 304 and the variable controller 306 is provided in the refrigerating cycle. Evaporation temperatures of the evaporators 304 and 305 are variably controlled by the controller 306. As required, the evaporator 304 is bypassed to optimize the cooling amount of the evaporators 304 and 305 to improve the efficiency of the refrigerating equipment and the storing quality of objects to be cooled.
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公开(公告)号：JP2001355955A
公开(公告)日：2001-12-26
申请号：JP2001141250
申请日：2001-05-11
Applicant: MATSUSHITA REFRIGERATION
Inventor： SAITO TETSUYA , KIMURA YOSHITO , HAMANO YASUKI
Abstract: PROBLEM TO BE SOLVED: To reduce the amount of circulation of a refrigerant in a cooling system for switching cooling a cold room and a freezing room, and to improve efficiency. SOLUTION: A closed loop is formed by a compressor 1, a condenser 2, a first capillary 7, and a first evaporator 3. Then, a second capillary 8 and a second evaporator 5 are connected so that the first capillary 7 and the first evaporator 3 are in parallel to switch the flow of the refrigerant by channel control means 10 and 11. When switching from the cooling of a freezing room 6 by the second evaporator 5 to the cooling of a cold room 4 by the first evaporator, the compressor 1 is operated while the channel control means 10 and 11 are closed down for specific time, and then the cold room 4 starts to be cooled, thus rapidly forcing out the refrigerant staying in the second evaporator toward the side of the compressor 1 and hence cooling the cold room 4 efficiently.
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公开(公告)号：JP2001133113A
公开(公告)日：2001-05-18
申请号：JP31056899
申请日：1999-11-01
Applicant: MATSUSHITA REFRIGERATION
Inventor： HAMANO YASUKI , KIMURA YOSHITO , SAITO TETSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a refrigerator in which energy can be saved and the quantity of refrigerant can be reduced by cooling a refrigeration compartment and a freezing compartment while switching thereby enhancing the efficiency of a cooling system. SOLUTION: In a cooling cycle where a refrigeration compartment 4 and a freezing compartment 6 are cooled independently by switching the flow of refrigerant to a refrigeration compartment side cooling circuit having a first evaporator 3 of relatively high evaporation temperature and a freezing compartment side cooling circuit having a second evaporator 5 of relatively low evaporation temperature through a channel control means 12, the quantity of refrigerant required by the refrigeration compartment side cooling circuit for cooling the refrigeration compartment 4 is set smaller as compared with the quantity of refrigerant required by the freezing compartment side cooling circuit for cooling the freezing compartment 6.
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公开(公告)号：JP2001133111A
公开(公告)日：2001-05-18
申请号：JP31056799
申请日：1999-11-01
Applicant: MATSUSHITA REFRIGERATION
Inventor： HAMANO YASUKI , KIMURA YOSHITO , SAITO TETSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a refrigerator in which energy can be saved and the quantity of refrigerant can be reduced by cooling a refrigeration compartment and a freezing compartment while switching thereby enhancing the efficiency of a cooling system. SOLUTION: In a cooling cycle where the quantity of refrigerant required for cooling a refrigeration compartment 4 is lower as compared with the quantity of refrigerant required for cooling a freezing compartment 6, a compressor 1 is operated (pump down) under a state where the outlet side of a condenser 2 is closed by a channel control means 12 for a predetermined time immediately before cooling is switched from the freezing compartment 6 to the refrigeration compartment 4 and cooling of the refrigeration compartment 4 is started after refrigerant standing in a second evaporator 5 is purged to the condenser 2 side.
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Patent Agency Ranking
公开(公告)号：JP2000230767A
公开(公告)日：2000-08-22
申请号：JP3094599
申请日：1999-02-09
Applicant: MATSUSHITA REFRIGERATION
Inventor： HAMANO YASUKI , KIMURA YOSHITO , SAITO TETSUYA
Abstract: PROBLEM TO BE SOLVED: To permit the improvement of reliability by a method wherein the amount of refrigerant for a cooling system for cooling a refrigerating chamber and a freezing chamber independently mutually is reduced and the efficiency of the cooling system is improved while the extreme low-pressure operation of a compressor is prevented. SOLUTION: In a refrigerator, a compressor 1 is operated (pump down) and a second fan 15 is operated immediately before switching from the cooling of a freezing chamber 6 into the cooling of a refrigerating chamber 4 and immediately before cooling the refrigerating chamber 4 upon starting the compressor 1 for a predetermined period of time under a condition that both of a first opening and closing valve 10 and a second opening and closing valve 11 are closed. According to this method, refrigerant, staying in a second evaporator 5, is purged into the side (high pressure side) of a condenser 2 and, thereafter, the first opening and closing valve 10 is opened to start the cooling of the refrigerating chamber 4.
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公开(公告)号：JP2000230766A
公开(公告)日：2000-08-22
申请号：JP3094499
申请日：1999-02-09
Applicant: MATSUSHITA REFRIGERATION
Inventor： KIMURA YOSHITO , HAMANO YASUKI , SAITO TETSUYA
Abstract: PROBLEM TO BE SOLVED: To contrive the reduction of the amount of combustible refrigerant and the obtaining of a high efficiency. SOLUTION: A refrigerant circuit is constituted in a refrigerator by a method wherein a closed loop is formed of a low-pressure vessel type compressor 1, a condenser 2, a first evacuating means 7 and a second evaporator 5 while a second evacuating means 8, a first evaporator 3 and a reverse flow preventing means 9 are connected in parallel to the second evaporator 5 to switch the first evaporator 3 and the second evaporator 5 alternately by a flow passage control means 12 arranged at the inlet port side of the evacuating means. The second evaporator 5 and a first fan 13 are provided in a refrigerating chamber 4 while the first evaporator 3 and a second fan 14 are provided in a freezing chamber 6. A control means for operating the fan of the evaporator, through which refrigerant flown, and the compressor continuously is provided while combustible refrigerant is sealed as the refrigerant.
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公开(公告)号：JPH11237161A
公开(公告)日：1999-08-31
申请号：JP3840498
申请日：1998-02-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： HAMANO YASUKI , KIMURA YOSHITO , HYODO AKIRA , YAMADA HIROSHI , IWAI HARUHIKO , KANEOKA SHINICHI
Abstract: PROBLEM TO BE SOLVED: To improve efficiency of defrosting, improve preservation of freshness of food as a result thereof, and reduce power consumption in a freezing refrigerator. SOLUTION: A freezing refrigerator are provided with a cooling system wherein a compressor 11, a condenser, and a first pressure reducing means are connected in order in series between the first pressure reducing means and a second evaporator 5 provided in a freezing room 2 are connected in parallel a first evaporator 4 provided in a refrigerating room 3 with a refrigerant control valve arranged at the inlet part thereof and a second pressure reducing means, a first chill circulating means 6, a second chill circulating means 7, and a defrosting heater 10. When defrosting the second evaporator by energizing the defrosting heater 10 at a first specified timing, operation of the compressor 11 is stopped, the refrigerant control valve is closed, and the first chill circulating means 6 is operated, thereby reducing the quantity of frost attaching to the second evaporator 5 in particular, reducing a temperature rise in the chamber during defrosting, improving preservation of freshness of food, and operation time for normal operation after defrosting.
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公开(公告)号：JPH11237155A
公开(公告)日：1999-08-31
申请号：JP4166198
申请日：1998-02-24
Applicant: MATSUSHITA REFRIGERATION
Inventor： FUJIHASHI MAKOTO , YAMADA HIROSHI , IWAI HARUHIKO , KIMURA YOSHITO , HAMANO YASUKI , HYODO AKIRA
Abstract: PROBLEM TO BE SOLVED: To reduce the operation sound at the time of a blower for a cold storage room and a blower for freezing room being driven at the same time, in a cooling system where the cold storage room and the freezing room are severally independent. SOLUTION: When a blower 4 for a cold storage room and a blower 7 for a freezing room 7 operate at the same time, the blower 7 for a freezing room is operated at a speed lower than its usual speed being set in advance, and when the blower 4 for a cold storage room stops its operation, the blower 7 for a freezing room is operated at the usual speed. Accordingly, the operation sound of the blower can be lowered while keeping the cooling capacity.
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公开(公告)号：JPH1019448A
公开(公告)日：1998-01-23
申请号：JP17474096
申请日：1996-07-04
Applicant: MATSUSHITA REFRIGERATION
Inventor： NODA TOSHINORI , KANEOKA SHINICHI , HAMANO YASUKI
Abstract: PROBLEM TO BE SOLVED: To save energy by canceling a defrosting operation and setting a normal cooling operation only when a temperature change rate between the temperature at the time of starting the defrosting operation and the temperature after a lapse of a given time from the starting of defrosting operation is larger than a predetermined value. SOLUTION: An evaporator 3 is monitored by a temperature sensor 17 which constitutes temperature detecting means and is arranged in a space located above and at a right side of the evaporator 3. In response to an output of the temperature sensor 17, the temperature change of the evaporator 3 within a given time is calculated by temperature calculating means 18. It is judged whether the calculated result falls within a predetermined temperature difference or not. In such a judgment, only when the calculated result exceeds the predetermined temperature difference, a defrosting switch 19 is turned off so that a defrosting mode is canceled and an operation returns to a normal operation mode. Due to such a construction, electric energy which becomes necessary for feeding electricity to a defrosting heater 6 and electric energy for cooling the heat generation rate of the defrosting heater 6 can be reduced thus enabling an energy saving.
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