公开(公告)号：JP2001133128A

公开(公告)日：2001-05-18

申请号：JP31923299

申请日：1999-11-10

Applicant: MATSUSHITA REFRIGERATION

Inventor： TANAKA MASAAKI ,  SHIMIZU TAKESHI ,  NISHIMURA KOICHI

IPC: F25D11/02 ,  F25B47/02 ,  F25D21/08

Abstract: PROBLEM TO BE SOLVED: To obtain a refrigerator employing combustible refrigerant in which the risk of firing is reduced when defrost operation is performed under an environment where the combustible refrigerant has leaked. SOLUTION: Since a refrigeration cycle using combustible refrigerant comprises juxtaposed coolers 23, 24 for refrigeration compartment and freezing compartment, temperature of a defrost means for the freezing compartment cooler 24 can be lowered and possibility of firing the combustible refrigerant can be reduced.

公开(公告)号：JP2001116419A

公开(公告)日：2001-04-27

申请号：JP30097799

申请日：1999-10-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： SHIMIZU TAKESHI ,  TANAKA MASAAKI ,  NISHIMURA KOICHI ,  YOKOYAMA NAOKI

IPC: F25D23/00 ,  F25B1/00 ,  F25B49/02 ,  F25D11/02

Abstract: PROBLEM TO BE SOLVED: To prevent the deterioration of the freshness of an article to be stored in the case of leaking a combustible refrigerant in a refrigerator using the combustible refrigerant. SOLUTION: The refrigerator comprises a compressor 19, a condenser 20, a pressure reducing mechanism 21, and an evaporator 10 to be functionally connected, a refrigerating cycle for sealing a combustible refrigerant, a refrigerant leakage sensing means 16 and an alarming means 17 for alarming a fault by the signal from the means 16. In this case, when the means 16 detects leakage of the refrigerant, the compressor 19 is continuously operated, and hence a temperature rise in the refrigerator is suppressed as much as possible, and the deterioration of the freshness of the stored material is reduced.

公开(公告)号：JP2000121236A

公开(公告)日：2000-04-28

申请号：JP29826698

申请日：1998-10-20

Applicant: MATSUSHITA REFRIGERATION

Inventor： SHIMIZU TAKESHI ,  TANAKA MASAAKI ,  NISHIMURA KOICHI ,  KAMISAKO TOYOSHI

IPC: F25D21/08 ,  F25B47/02

Abstract: PROBLEM TO BE SOLVED: To defrost an evaporator quickly without leaving frost by stopping a fan for an arbitrary time before starting defrost operation of the evaporator through a defrost means. SOLUTION: During cooling operation, a microcomputer counts the integrated operating time of a compressor 20 using a function thereof, i.e., a timer, and makes a decision whether the integrated operating time of the counter has reached 8 hours. Upon elapsing 8 hours after previous defrost operation, the microcomputer makes a decision whether the inner temperature is lower than a set level. At a moment when the inner temperature drops below the set level, the fan 11 is stopped for an arbitrary time before starting defrost operation of the evaporator 10 thus enhancing defrost efficiency while eliminating frost.

公开(公告)号：JPH09324750A

公开(公告)日：1997-12-16

申请号：JP14407196

申请日：1996-06-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： MORITA ICHIRO ,  KATAYAMA MAKOTO ,  NISHIMURA KOICHI

IPC: F04B17/04 ,  F04B35/04

Abstract: PROBLEM TO BE SOLVED: To control the compressor capacity by controlling the central position of stroke so that the effective cylinder volume can be varied and by controlling the stroke at the same time, regardless of the change of operating condition like pressure in a vibration compressor used for the refrigeration cycle or the like. SOLUTION: A vibration compressor comprising a reciprocating motion element 13 constituted at least by a mover 3b of a motor 3 or a piston 5, a movable element 12 connected to the reciprocating motion element 13 and a resonant spring 8, a pressure receiving end 12b of the movable element 12, a stationary back pressure chamber 14, and a back pressure controlling mechanism 15 can control the effective cylinder volume regardless of the change of operation condition like the pressure by controlling the central position of stroke so that the substantial cylinder volume of the compressor can be varied, and also applying at the same time the control mechanism of piston stroke.

公开(公告)号：JPH09250473A

公开(公告)日：1997-09-22

申请号：JP5462396

申请日：1996-03-12

Applicant: MATSUSHITA REFRIGERATION

Inventor： NISHIMURA KOICHI

IPC: F04C29/02 ,  F04C18/04 ,  F04C18/32 ,  F04C18/356 ,  F04C29/00

Abstract: PROBLEM TO BE SOLVED: To prevent wear-out of a contact part between a vane tip end part and a roller and improve reliability by providing a roller fitted to the outer circumference of an eccentric part and a gear-form part geared with a contact part with a vane contacting the tip end thereof with the outer circumference face of the roller and partitioning a compression chamber into a high-pressure and low-pressure chambers. SOLUTION: A refrigerant gas flowing from a cooling system is sucked into a low-pressure chamber 5b of a compression chamber 5 from an suction path 18, is compressed by eccentric swinging of a roller 30, and delivered from a delivery part 19. Part of the outer circumference of the roller 30 fitted to a crankshaft eccentricity part 4 forms a tooth form part while the tip end part of a vane 32 accommodated reciprocating-slidably in a vane groove 6 forms a tooth-form part. The ear end part of the vane 32 is pushed by means of a spring in an assembling state, and the tooth-form part at tip end thereof and the tooth-form part of the roller 30 are contacted in geared state. Thereby, sliding movement by which a contact point changes is eliminated, and rolling movement by which each contact point changes anywhere is obtained.

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

IPC: F25D19/00 ,  F25D11/00 ,  F25D23/00

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.

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

IPC: F25D21/08 ,  F25B1/00 ,  F25B47/02 ,  F25D21/04 ,  F25D21/14

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.

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

IPC: F25D19/00 ,  F25B39/04 ,  F25D23/00

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.

公开(公告)号：JPH09324751A

公开(公告)日：1997-12-16

申请号：JP14407296

申请日：1996-06-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： KATAYAMA MAKOTO ,  MORITA ICHIRO ,  NISHIMURA KOICHI

IPC: F04B17/04 ,  F04B35/04

Abstract: PROBLEM TO BE SOLVED: To prevent the collision of a piston caused by the increment of piston stroke due to the change of operational pressure, etc., and the occurrence of breaking and operation noise of a piston, a suction valve, and a discharge valve in a vibration compressor used for a refrigerator, an air conditioner, or the like. SOLUTION: In a vibration compressor comprising a back pressure chamber 13 surrounded by the stationary element, a communicating hole 14 whose distal end 13 is connected to the back pressure chamber 13 and an another end is connected to the inside of an inner circumference surface of a cylinder 4, and a communicating hole 15 provided at stationary element and its end is connected to the inner circumference surface 4 and an another is connected to either the hermetic case 1 or to a low pressure chamber 7a of the cylinder head, when the stroke distance is increased, by moving the center position of reciprocating motion to the anti-compression chamber side, the collision of piston 5 will be prevented and the breaking and noise generation of a piston 5, the suction valve, and the discharge valve are prevented.