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公开(公告)号：EP1180653A4
公开(公告)日：2003-07-16
申请号：EP00927765
申请日：2000-05-15
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANAKA MASAAKI , SHIMIZU TAKESHI , NISHIMURA KOICHI
CPC classification number: F25D29/006 , F25B2400/12 , F25D21/08 , F25D2400/24
Abstract: A refrigerator using an inflammable refrigerant capable of reducing the risk of fire which may occur when defrosting is performed under the environment that the inflammable refrigerant leaks, comprising an evaporator (10) of a refrigerating cycle using inflammable refrigerant and defrosting means (18) defrosting the evaporator (10), wherein the temperature of the defrosting means (18) is maintained at less than the ignition temperature of the inflammable refrigerant.
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公开(公告)号：JP2000310473A
公开(公告)日：2000-11-07
申请号：JP11764099
申请日：1999-04-26
Applicant: MATSUSHITA REFRIGERATION
Inventor： SHIMIZU TAKESHI , TANAKA MASAAKI , NISHIMURA KOICHI
Abstract: PROBLEM TO BE SOLVED: To let cooling air flow into a condenser efficiently to promote cooling, by providing a fan which forcibly cools the condenser which is placed inside a duct, and by making the gap between the duct and the condenser narrower than the fin pitch of the condenser. SOLUTION: A machinery room 12 is partitioned by a partitioning wall 3 and a rear face cover and provided at the lower part of a refrigerator 1. In the machinery room 12, a compressor 5, an evaporating dish 14, and a cooling fan 6 are installed. When the cooling fan 6 is operated, outside air from a suction opening 17 cools down a condenser 16 of a suction duct 15, flows into the machinery room 12 from an ejection hole 24, cools down the compressor 5 via the evaporating dish 14 and the cooling fan 6, and is discharged outside the refrigerator from a discharge opening 13. Since the gap between the suction duct 15 and the condenser 16 is made narrower than the fin pitch of the condenser 16, the flow of the outside air of the suction duct 15 flows into the condenser 16 without diverting to the gap. As a result, most of the outside air which has flown in from the suction opening 17 can flow into the condenser 16, and efficient cooling of the condenser is permitted.
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公开(公告)号：JP2000121235A
公开(公告)日：2000-04-28
申请号：JP29826398
申请日：1998-10-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： NISHIMURA KOICHI , SHIMIZU TAKESHI , TANAKA MASAAKI , KAMISAKO TOYOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a refrigerator using ignitable refrigerant in which a defrosting efficiency of an evaporator is increased and a reduction in efficiency of the refrigerator is prevented even in the case that a low temperature defrosting heater is applied. SOLUTION: There are provided an evaporator 3; a defrosting heater 4 closely contacted with fins 3a of the evaporator 3 to melt and dissolve frost adhered to the evaporator 3, a heater temperature sensing means 8 for use in sensing a temperature at the section where the defrosting heater 4 shows the highest temperatures; and a heater temperature control device 9 for controlling a temperature of the defrosting heater 4 in such a way that the temperature detected by the heater temperature sensing means 8 does not become the set temperature or higher.
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公开(公告)号：JPH10292973A
公开(公告)日：1998-11-04
申请号：JP10138997
申请日：1997-04-18
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANAKA MASAAKI , SHIMIZU TAKESHI , NISHIMURA KOICHI
Abstract: PROBLEM TO BE SOLVED: To prevent the decrease of the quantity of the flowing-in outer air from the inlet hole of a duct and to prevent the shortage of condensing capacity to be caused by the decrease of the cooling efficiency of a condenser by removing dust adhered to the inlet hole and the condenser automatically together with the opening and closing of a drawer type door. SOLUTION: Outer air enters from the inlet hole 7 of a duct 2 passing through a decorative cover 12 by the operation a fan installed to the inside of a machine room 3, the outer air which has entered inside the duct 2 heat exchanges with a condenser 13 inside the duct 2 and the dust entering together with the outer air by ventilation adheres to the intake hole 7 and the upstream side of the condenser 13. The temperature of a refrigerating compartment 10 is lower than the outer air temperature so that the outer air flows in when the drawer type door 11 is opened and cold air flows out when the door 11 is closed compressing the refrigerating compartment 10. The pulsation of the air-flow between the outer air and the refrigerating compartment 10 caused by the opening and closing of the door 11 is conducted to the inlet hole 7 of the duct 2 and the condenser 13 and removes the dust adhered to them.
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公开(公告)号：JPH09287863A
公开(公告)日：1997-11-04
申请号：JP9651596
申请日：1996-04-18
Applicant: MATSUSHITA REFRIGERATION
Inventor： SHIMIZU TAKESHI
Abstract: PROBLEM TO BE SOLVED: To reduce an electric power consumption of a refrigerator, wherein a predetermined temperature in the refrigerator is controlled such that the predetermined temperature is altered to take a higher predetermined temperature during a time period in which a power demand peaks thus lowering an operating efficiency of the refrigerator during this time slot. SOLUTION: Except for a time period in which a power demand peaks, a compressor 4 and a cooling fan 19 are operated based on a predetermined temperature in a refrigerating room so as to refrigerate the inside of the refrigerator. On the other hand, during the time period in which the power demand peaks, the compressor 4 and the refrigerating fan 19 are operated based on a second predetermined temperature which is higher than the previous predetermined temperature so as to refrigerate the inside of the refrigerator. Namely, when the temperature in a refrigerating room is not higher than the second predetermined temperature, a signal is fed to a CPU 46 from a second temperature detecting means 51 so as to turn off a relay and stop the operation of the compressor 4 and the cooling fan 19. When the second temperature detecting means 51 detects that the temperature in the refrigerating room is higher than the second predetermined temperature, the CPU 46 makes the relay turn on so as to make the compressor 4 and the cooling fan 19 operate thus refrigerating the inside of the refrigerator. In this manner, during the time period in which the power demand is high, the temperature control is carried out based on the second predetermined temperature so that an operating efficiency of the compressor and the cooling fan can be lowered thus enabling a reduction of an electric power consumption.
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Patent Agency Ranking
公开(公告)号：JPH09113042A
公开(公告)日：1997-05-02
申请号：JP27269295
申请日：1995-10-20
Applicant: MATSUSHITA REFRIGERATION
Inventor： KINO AKIHIRO , SHIMIZU TAKESHI , TANAKA MASAAKI
Abstract: PROBLEM TO BE SOLVED: To enable oil to be easily returned back to a compressor by a method wherein an evaporator and a header are heated, a temperature of the evaporator is detected, and an oil returning is carried out for controlling a low temperature part-heating means and a compressor by applying a sensing output of an evaporator temperature heating means. SOLUTION: During operation of a compressor 1, a temperature of an evaporator 4 or a header 5 is decreased, and reaches a predetermined temeprature. Then, an evaporator temperature sensing means 10 detects that the temperature is less than a predetermined temperature and outputs it to an oil returning control means 11. The oil returning control means 11 outputs a signal to the low temperature part heating means 9 under a state in which the compressor 1 is being operated. The low temperature part heating means 9 starts to heat the evaporator 4 and the header 5 and further starts an oil returning operation. Temperatures of the evaporator 4 and the header 5 are started to increase and reach a predetermined second temperature. Freezer oil 7 stagnating at the low temperature part is improved in its flowability due to a reduction in viscosity as its temperature is increased and it is returned back to the compressor 1.
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公开(公告)号：JPH0914798A
公开(公告)日：1997-01-17
申请号：JP16040095
申请日：1995-06-27
Applicant: MATSUSHITA REFRIGERATION
Inventor： SHIMIZU TAKESHI , KINO AKIHIRO , TANAKA MASAAKI
IPC: F25B43/00
Abstract: PURPOSE: To prevent the liquid refrigerant suction of the compressor of a refrigerating cycle using refrigerant such as HFC134a containing hydrofluorocarbon as a main ingredient and refrigerating machine oil having no or small mutual solubility with the refrigerant. CONSTITUTION: The refrigerating cycle comprises a compressor 1, a condenser 2, an expansion mechanism 3, an evaporator 11, a header 13, refrigerant containing hydrofluorocarbon as a main ingredient, and refrigerating machine oil 7 having no or small mutual solubility with the refrigerant.
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公开(公告)号：JPH08271068A
公开(公告)日：1996-10-18
申请号：JP7748995
申请日：1995-04-03
Applicant: MATSUSHITA REFRIGERATION
Inventor： KINO AKIHIRO , SHIMIZU TAKESHI , TANAKA MASAAKI
IPC: F25B1/00
Abstract: PURPOSE: To prevent the excess retention of refrigerating machine oil discharged from the compressor of a refrigerating cycle using refrigerant which contains hydrofluorocarbon as a main ingredient such as HFC134a and the oil having no mutual non-solubility or small non-solubility with the refrigerant. CONSTITUTION: The refrigerating cycle comprises a compressor 1, a condenser 2, an expanding mechanism 3, an evaporator 4, a refrigerant containing a hydrofluorocarbon as a main ingredient, a refrigerating machine oil 7 having no mutual solubility with the refrigerant, a header A9 installed between the evaporator 4 and the compressor 1, an inlet tube A11, an outlet tube A12 inserted substantially to the center of the header A9, and a refrigerant vapor suction hole 13 provided at the above position in the header A9 of the side of the tube A12.
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公开(公告)号：JPH08247672A
公开(公告)日：1996-09-27
申请号：JP4702295
申请日：1995-03-07
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANAKA MASAAKI , SHIMIZU TAKESHI , HYODO AKIRA
IPC: F28D20/00
Abstract: PURPOSE: To uniformize fusion of a heat accumulation material and to improve the efficiency of a heat accumulator, in a heat accumulating device which utilizes a heat accumulation material and is used for refrigeration or cooling. CONSTITUTION: A heat accumulator 15 is filled with a heat accumulation material and comprises one surface being a heat-exchange surface 20 for freezing and a back surface being a heat-exchange surface 21 for fusion having an uneven surface along which fluid flows. Heat accumulation units each having a cooling device 17 wherein a damper part 22 is arranged on the fluid discharge side, the thickness of the damper part 22 is higher than that of the heat- exchange surface for fusion, and the protrusion part of the heat-exchange surface 21 for fusion of the heat-accumulator 15 making plane contact with the heat-exchange surface 20 for freezing in a state to make abutment thereagainst is provided are laminated together.
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公开(公告)号：JPH08247587A
公开(公告)日：1996-09-27
申请号：JP4702395
申请日：1995-03-07
Applicant: MATSUSHITA REFRIGERATION
Inventor： TANAKA MASAAKI , KINO AKIHIRO , SHIMIZU TAKESHI
IPC: F25B43/02
Abstract: PURPOSE: To return a refrigerating machine oil directly to a suction piping of a compressor by a method wherein a header is arranged to be a double tube and an insertion pipe is inserted into an internal space thereof to connect an outlet piping of an evaporator to a throttle part at a lower part of the header. CONSTITUTION: In a refrigerating cycle in which a compressor, a condenser, an expanding mechanism, an evaporator and a header 5 are connected in a loop to circulate a refrigerant and a refrigerating machine oil having no or scarce mutual solubility with the refrigerant, a header 5 is so arranged to be a double tube comprising an outer tube 9 and an inner tube 10. An insertion pipe 13 branched to be extended to the internal space 12 of the header 5 is inserted to a throttle part 11 at a lower part of the inner tube 10 and an outlet piping 14 of the evaporator is connected at a lower part of the inner tube 10 while a suction piping 6 of the compressor at an upper part thereof. Thus, the refrigerating machine oil 7 is kept from flowing into the internal space 12 within the header 5 to be returned directly to the suction piping 6 of the compressor thereby enabling favorably maintaining of the lubrication of sliding parts of the compressor.
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