公开(公告)号：JP2001201235A

公开(公告)日：2001-07-27

申请号：JP2000005530

申请日：2000-01-14

Applicant: MATSUSHITA REFRIGERATION

Inventor： NISHIMURA KOICHI ,  KINO AKIHIRO

IPC: F25D11/02 ,  F25B5/02

Abstract: PROBLEM TO BE SOLVED: To achieve high efficiency by a wide ranging capacity control concerning a refrigerator-freezer, using a double-stage compression system. SOLUTION: There are arranged a refrigerator-freezer body having a freezer compartment and a refrigerator compartment, low stage side compressor 10, high stage side compressor 12, condenser 5, low-stage side capillary 6, low-stage side flow rate adjuster 14 which is provided between the condenser 5 and the low stage side capillary 6 for adjusting the flow rate of a refrigerant to the low-stage side capillary 6, low-stage side evaporator 8 for cooling the freezer compartment, low-stage side suction tube 11 provided between the low-stage side evaporator 8 and the low-stage side compressor 10, high-stage side capillary 7, high-stage side flow rate adjuster 15 which is provided between the condenser 5 and the high-stage side capillary 7 for adjusting the flow rate of the refrigerant to the high-stage side capillary 7, high-stage side evaporator 9 for cooling the refrigerator compartment, and high-stage side suction tube 13 provided between the high stage side evaporator 9 and the high-stage side compressor 12.

公开(公告)号：JP2000266436A

公开(公告)日：2000-09-29

申请号：JP6638899

申请日：1999-03-12

Applicant: MATSUSHITA REFRIGERATION

Inventor： YOKOYAMA NAOKI ,  KINO AKIHIRO

IPC: F25D11/00

Abstract: PROBLEM TO BE SOLVED: To reduce the quantity of refrigerant being encapsulated by providing a combustible refrigerant encapsulated in a refrigerating cycle, a refrigerating machine oil compatible with the refrigerant, a storage chamber being cooled through refrigerating cycle, and a body including the storage chamber provided with at least one door thereby preventing the refrigerant from standing in a gas/liquid separator. SOLUTION: A storage chamber 23 comprises a body 21 and a door 22. When a compressor 26 is operated, high temperature high pressure combustible refrigerant 29 delivered from the compressor 26 flows into a condenser 27 where it is condensed and liquefied through heat exchange with the outdoor air and flows into an expansion mechanism 28. The combustible refrigerant is reduced in pressure by the expansion mechanism 28, evaporated in an evaporator 25 and returned back to the compressor 26 after exchanging heat with air in the refrigerator. Since a place causing stagnation of highly viscous refrigerating machine oil 30 is not present in the vicinity of the low temperature evaporator 25, the combustible refrigerant 29 circulates without dissolving into the refrigerating machine oil 30 standing in the cycle and the refrigerating cycle is repeated.

公开(公告)号：JPH10300247A

公开(公告)日：1998-11-13

申请号：JP10562197

申请日：1997-04-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： MASATOKI YOSHIBUMI ,  KINO AKIHIRO

IPC: F25B1/00

Abstract: PROBLEM TO BE SOLVED: To improve reliability by continuously connecting a discharge hole for communicating its interior of a sheet of a compressor with its exterior, a discharge tube, a two-way valve, a flow control tube and an evaporation tube in series, and communicating a discharge port with a suction tube of the compressor, thereby rapidly removing liquid refrigerant retained in the compressor. SOLUTION: A two-way valve control means A21 opens a two-way valve 14 by start of a compressor 10. Thus, liquid refrigerant retained in a shell 11 of the compressor 10 arrives at a flow limiting tube 15. The refrigerant is decompressed by the tube 15, and arrives at an evaporating tube 16. The refrigerant is evaporated in the tube 15, and pressure of the tube 16 is lowered. This is sensed by an evaporating tube pressure sensor 20. The refrigerant in the shell 11 is eliminated, and refrigerating machine oil 7 arrives at the tube 16. Then, the pressure of the tube 16 is raised. This pressure rise is sensed by the sensor 20, and output to the means A21. The means A21 closes the valve 14 by an output of pressure rise sensing of the sensor 20.

公开(公告)号：JPH10300244A

公开(公告)日：1998-11-13

申请号：JP10561697

申请日：1997-04-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： KINO AKIHIRO ,  MASATOKI YOSHIBUMI

IPC: F25B1/00

Abstract: PROBLEM TO BE SOLVED: To rapidly remove liquid refrigerant retained in a compressor, by installing a heater in close contact with an outer surface of a shell of the compressor substantially at a bottom of the compressor, and communicating an interior of the compressor within a receiver via communicating tube. SOLUTION: At the time of stopping a compressor 10, a temperature of the compressor 10 is raised by heating via a heater 14. Thus, temperature of refrigerant in the compressor 10 is raised, but since a receiver 12 is separately independently installed from the compressor 10, there occurs a temperature difference between the compressor 10 and the receiver 11. Thus, the refrigerant is moved due to vapor partial pressure difference of the both, and hence moved to the receiver 12. In this manner, liquid refrigerant in the compressor 10 is eliminated. As a result, only refrigerating machine oil is supplied to a compressor driver to prevent lubricating failure due to mixture of liquid refrigerant, resulting in much contribution to an improvement in reliability of the compressor 10.

公开(公告)号：JPH09236359A

公开(公告)日：1997-09-09

申请号：JP4258396

申请日：1996-02-29

Applicant: MATSUSHITA REFRIGERATION

Inventor： TANAKA MASAAKI ,  KINO AKIHIRO ,  SHIMIZU TAKESHI

IPC: F25B1/00 ,  F25B43/02

Abstract: PROBLEM TO BE SOLVED: To improve the durability and reliability of a compressor in a refrigeration system in which refrigerator oil and refrigerant are separated into two phases by restraining the variations of capacity and preventing liquid refrigerant from flowing into the compressor. SOLUTION: A header 5' of a refrigerating system is composed of a vessel 5a' having at its top an opening communicating with the outlet side of an evaporator and a suction pipe 6' whose one end is inserted from below into the vessel 5a' and whose other end communicates with the suction side of a compressor, and a small hole 9 is provided in the lower side of a portion of the pipe 6' inserted into the vessel 5a', which hole 9 allows liquid refrigerant remaining in the vessel 5a' of the header 5' to return to the compressor, whereby the variations of the capacity of the compressor can be restrained and the liquid refrigerant can be prevented from flowing into the compressor so that the durability and reliability of the compressor can be improved.

公开(公告)号：JPH08285409A

公开(公告)日：1996-11-01

申请号：JP8812895

申请日：1995-04-13

Applicant: MATSUSHITA REFRIGERATION

Inventor： SASABE SHIGERU ,  SAKAI TOSHIKAZU ,  KITA ICHIRO ,  KATAOKA JINKO ,  KINO AKIHIRO ,  SHIMIZU TAKESHI ,  TANAKA MASAAKI ,  YONEMURA MINORU

IPC: F25B43/00 ,  F25B43/02

Abstract: PURPOSE: To increase an oil returning amount within an accumulator and to enable a poor lubricating action at a sliding part of a compressor to be reduced. CONSTITUTION: This accumulator is comprised of a container 5 storing refrigerant; a partition plate 6 for dividing the container 5 into two chambers, i.e., A chamber 7 and B chamber 8; an inlet pipe connected to an upper part of the A chamber 7 of the container 5; a first outlet pipe 9 connected to a lower part of the A chamber 7 of the container 5; a second outlet pipe 10 inserted into the lower part of the B chamber 8 of the container 5 and having its one end connected to a side part of the first outlet pipe 9; and a separated pipe 11 having one outer diameter smaller than an inner diameter of the inlet pipe, having one end inserted into the inlet pipe and the other end being connected to the partition plate 6 at a position higher than that of an end surface of the second outlet pipe 10.

公开(公告)号：JPH08271098A

公开(公告)日：1996-10-18

申请号：JP7748895

申请日：1995-04-03

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  KITA ICHIRO ,  KINO AKIHIRO ,  SHIMIZU TAKESHI ,  TANAKA MASAAKI ,  YONEMURA MINORU

IPC: F25B45/00

Abstract: PURPOSE: To prevent an abnormal drop in suction pressure by a method wherein a header consists of a vessel to store liquid refrigerant, a refrigerant inlet pipe connected to the upper part of the vessel and a refrigerant outlet pipe inserted from below and a part of the outlet pipe is made up of a permeable membrane whose pours have diameters within a specified range. CONSTITUTION: A header 5 has such a construction that a refrigerant inlet pipe 10 is connected to the upper part of a vessel 11 and a refrigerant outlet pipe 9 is inserted into the vessel 11 from below. A hole is provided in a part of the refrigerant outlet pipe 9 and covered with a polytetrafluoroethylene-made permeable membrane 13 which has pours with diameters of 0.01-3μm and is supported by a porous resin 12. An evaporator is connected to the upper part of the inlet pipe 10 and a compressor is connected to the lower part of the outlet pipe 9 via a suction pipe 6. Thereby, an abnormal drop in suction pressure can be prevented and the specified refrigerating performance can be maintained.

公开(公告)号：JPH0791791A

公开(公告)日：1995-04-04

申请号：JP23450693

申请日：1993-09-21

Applicant: MATSUSHITA REFRIGERATION

Inventor： KINO AKIHIRO ,  NODA TOSHINORI ,  ASAKAWA OSAMU ,  MASATOKI YOSHIBUMI ,  KANEOKA SHINICHI

IPC: F25D11/00

Abstract: PURPOSE:To prevent liquid refrigerant from becoming flash gas, etc., at the time of starting an operation of a compressor by sensing an indoor temperature, operating a cooling fan only for a predetermined time before the operation of the compressor is started, and starting the operation of the compressor after a temperature of a machine room is lowered. CONSTITUTION:A refrigerator comprises a compressor 3 installed in a machine room 2 partitioned in a lower innermost part of a body 1 and cooled by a cooling fan 9. On the other hand, a temperature in the refrigerator is sensed by indoor temperature sensing means 10. The fan 9 is controlled by cooling fan control means 11 based on the sensed indoor temperature. The means 11 outputs a drive command held temporarily when a predetermined time set by a timer 12 is elapsed to the compressor 3 and starts the operation of the fan 9. That is, the operation of the fan 9 is started prior to the start of the operation of the compressor 3 thereby preventing liquid refrigerant from becoming flash gas at the time of starting the operation of the compressor 3 and cooling from becoming insufficient due to a disturbance of circulating the refrigerant.

公开(公告)号：JPH0783555A

公开(公告)日：1995-03-28

申请号：JP22998993

申请日：1993-09-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： MASATOKI YOSHIBUMI ,  NODA TOSHINORI ,  ASAKAWA OSAMU ,  KINO AKIHIRO ,  KANEOKA SHINICHI

IPC: F25B1/00 ,  F25D19/00

Abstract: PURPOSE:To provide a freezing and cold storing device having considerably improved cooling performance and reliability by a method wherein the production of flash gas is prevented without heating a capillary tube at the time of restarting a compressor after completion of defrosting to contrive the maintenance of a normal cooling operation. CONSTITUTION:A freezing and cold storing device is provided with a cold air duct 7 in communication with a freezing chamber and a cold storing chamber, a capillary tube 6 and a suction pipe 5. By securing the capillary tube 6 in contact with the outer wall of the cold air duct 7, the production of flash gas is prevented to contrive a normal cooling inside the device or the prevention of a temp. rise of a compressor.

公开(公告)号：JPH074792A

公开(公告)日：1995-01-10

申请号：JP14461393

申请日：1993-06-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： KINO AKIHIRO ,  NODA TOSHINORI ,  ASAKAWA OSAMU ,  MASATOKI YOSHIBUMI ,  KANEOKA SHINICHI

IPC: F25B1/00 ,  F25B47/02 ,  F25D11/00

Abstract: PURPOSE:To prevent occurrence of a hindrance of circulation of a refrigerant which is caused by that the refrigerant in a capillary tube exchanging heat with a suction pipe is turned into a gas by extraordinary heating when an overheated refrigerant in an evaporator after completion of a defrosting operation flows through the suction pipe. CONSTITUTION:After completion of defrosting, a two-way valve control means 32 detects a start of a compressor 9 and opens a two-way valve 31. At this time, a suction pipe temperature detecting means 33 detects the temperature of a suction pipe 13 and maintains the state of the two-way valve 31 until the temperature of the suction pipe 13 lowers to a prescribed temperature (e.g. -10 deg.C). Thereby the temperature of the suction pipe 13 lowers and a hindrance of circulation of a refrigerant in a capillary tube 11 is not caused.