公开(公告)号：JP2003214748A

公开(公告)日：2003-07-30

申请号：JP2002013901

申请日：2002-01-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAITO TETSUYA ,  SAKAI TOSHIKAZU ,  KIMURA YOSHITO ,  MORISHITA KENICHI ,  OYAMADA MAKOTO

IPC: F25D11/02

Abstract: PROBLEM TO BE SOLVED: To hold down a temperature rise of a cold storage room and a refrigeration room during the stop of a compressor to the minimum. SOLUTION: On detecting that the temperature of the cold storage room 9 and the temperature of the refrigerating room 10 are equal to or lower than the set temperature, the compressor is stopped, and a three-way valve is totally closed. The totally closed state is continued until the next start of the compressor 1. During the stop of the compressor 1, a high temperature and high pressure refrigerant does not flow into the cooling devices of the cold storage room 9 and the refrigeration room 10, so that the temperature rise in each room can be held down to the minimum. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2000111210A

公开(公告)日：2000-04-18

申请号：JP28622998

申请日：1998-10-08

Applicant: MATSUSHITA REFRIGERATION

Inventor： SASABE SHIGERU ,  SAKAI TOSHIKAZU ,  NOZUE AKIHIRO

IPC: F25B1/00 ,  F25B43/00

Abstract: PROBLEM TO BE SOLVED: To reduce the quantity of charge of a refrigerant and raise the explosionproofness, by reducing the quantity of remaining oil within sealed container in a freezing system using a hydrocarbon as a refrigerant and using a freezer oil larger in specific gravity than the refrigerant, in an accumulator provided in a freezing system. SOLUTION: This is one which is provided with a oil return hole 4 at the undermost part of the section where the refrigerant outflow pipe 3 is inserted, in an accumulator which is equipped with a sealed container 1, a refrigerant inflow pipe 2 inserted from above the sealed container 1, and a refrigerant outflow pipe 3 inserted from under the sealed container 1, and when a liquid refrigerant high in oil percentage is stored in the lower part and a liquid refrigerant high in refrigerant percentage in the upper part within the sealed container by the fluctuation of the load, the liquid refrigerant high in refrigerant percentage evaporates gradually, and is sent to the refrigerant outflow pipe 3, becoming a gas refrigerant, and the freezer oil in the liquid refrigerant high in oil percentage in the lower part is sent to the refrigerant outflow pipe 3 through the oil return hole in the lowermost part at the refrigerant outflow pipe, whereby the quantity of remaining oil within the sealed container 1 can be reduced and the quantity of charge of the refrigerant can be reduced thereby raising the explosionproofness.

公开(公告)号：JPH11311181A

公开(公告)日：1999-11-09

申请号：JP11836298

申请日：1998-04-28

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  NOZUE AKIHIRO ,  ISHIDA TAKANORI ,  HIRATSUKA SATOSHI

IPC: F04B39/02 ,  F16N15/00

Abstract: PROBLEM TO BE SOLVED: To prevent generation of abnormal wear of a connection part between a piston pin and a connecting rod in the subject compressor. SOLUTION: Since a connecting rod 5 performs reciprocation motion to a fixed piston pin 13 at a connection part between the rod 5 and the pin 13, a fluid film caused by lubricant is hard to generate, leading in generation of metal contact at a part of a sliding surface. At this time, a lubricative film 14 having a frictional coefficient of 0.1 or less formed on a surface of the pin 13 and a metal contact part at the connection part of the rod 5 slide on each other, and accordingly the coefficient is kept to be 0.1 or less. As a result, a temperature increase in the vicinity of the connection part between the rod 5 and the pin 13 is reduced to prevent vaporization of lubricant, resulting in prevention of changeover to a dried frictional condition.

公开(公告)号：JPH11101517A

公开(公告)日：1999-04-13

申请号：JP26320397

申请日：1997-09-29

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  NOZUE AKIHIRO

IPC: F25B1/00 ,  C09K5/04

Abstract: PROBLEM TO BE SOLVED: To urge the atomization of a refrigerant in an evaporator and improve an evaporation efficiency in a refrigerating system such as a refrigerator. SOLUTION: Non-condensible gas whose condensing temperature is lower by 50 deg.C or more than the condensing temperature of a refrigerant under the condensing pressure of the refrigerant is sealed so as to have 100 to 1000 % of the high pressure side volume of a refrigerating system 6. The high pressure is increased by the non-condensible gas retained in a condenser 8, go that the flow velocity of the refrigerant can be increased without physically restricting a connecting pipe in the inlet of an evaporator 10. Further, the non-condensible gas dissolved in the liquid refrigerant bumps, so that a complete atomization effect can be obtained under a refrigerating condition at low evaporation temperature.

公开(公告)号：JPH10311628A

公开(公告)日：1998-11-24

申请号：JP11930597

申请日：1997-05-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  NOZUE AKIHIRO

IPC: F25B43/04

Abstract: PROBLEM TO BE SOLVED: To enhance the maintenability of the refrigeration cycle for a refrigerator, and the like, employing carbonate based refrigerator oil. SOLUTION: The refrigeration cycle is provided with a liquid coolant container 5 at the outlet of a condenser 2, and a sensor 6 for detecting the quantity of carbon dioxide at the upper of the liquid coolant container 5 in order to store carbon dioxide generated through deterioration of carbonate based refrigerator oil at the upper part of the liquid coolant container 5 and to detect carbon dioxide with high sensitivity. According to the arrangement, blocking of a coolant channel due to carbon dioxide can be detected in the early state and lowering of performance can be avoided by performing maintenance e.g. replacement of coolant or refrigerator oil, before the performance is deteriorated significantly.

公开(公告)号：JPH09304262A

公开(公告)日：1997-11-28

申请号：JP12543696

申请日：1996-05-21

Applicant: MATSUSHITA REFRIGERATION

Inventor： NOZUE AKIHIRO ,  SAKAI TOSHIKAZU ,  SASABE SHIGERU

IPC: G01N11/12

Abstract: PROBLEM TO BE SOLVED: To provide a viscometer capable of accurately and rapidly measuring the viscosity of freezing machine oil coexisting with a liquid cooling medium. SOLUTION: A liquid cooling medium and freezing machine oil are sealed in a measuring pipe composed of a transparent pressure-resistant cylinder arranged in an inclined state to be allowed to stand, and a fall sphere 14 composed of a ferromagnetic material is attracted by a permanent magnet 16 to be held at the upstream initial position of an freezing machine oil phase 10 in such a state that a liquid cooling medium phase 12 and the freezing machine oil phase 10 are separated in an equibrium state, and a permanent magnet support rod 18 is attracted by an electromagnet 19 to separate the permanent magnet 16 from the outer wall of a measuring pipe 13 to demagnetize the same and the attraction and holding of the fall sphere 14 is released to allow the sphere 14 to fall. The passing speed of the fall sphere 14 is measured by a passage sensor 15 arranged on the downstream side of the freezing machine oil 10 and the viscosity of the freezing machine oil is measured on the basis of the correlation of the passing speed with viscosity. Since viscosity is measured in such a state that the liquid cooling medium phase 12 and the freezing machine oil phase 10 are separated and allowed to stand, an equilibrium state is not disturbed and an accurate viscosity value is obtained. When viscosity is measured in a thermostatic tank 24, the above mentioned demagnetizing operation can be performed without opening the door of the tank 24.

公开(公告)号：JPH09303908A

公开(公告)日：1997-11-28

申请号：JP11455296

申请日：1996-05-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU ,  SASABE SHIGERU ,  NOZUE AKIHIRO

IPC: F25B47/00

Abstract: PROBLEM TO BE SOLVED: To improve a cleaning capability and restrict a residual amount of detergent during a cleaning operation of a freezing system such as a refrigerator or the like. SOLUTION: Detergent is circulated between a storing tank 12 for storing detergent under a liquid state of pressurized condition and a condenser 1 of a freezing system to be cleaned. Supplying of detergent in respect to the condensing device 1 is carried out through a supplying pipe passage 13 and a returning flow of the detergent is performed in a discharging pipe passage 18. the detergent is gasified at a gas-liquid separator 19 within a discharging pipe passage 18 to separate stains in the condenser 1 and the detergent, thereafter gas of detergent is forcedly fed by a pump 20, liquefied by the condensing device 22 and circulated to the storing tank 12. If a three-way valve 16 is closed while the pump 20 is being operated, the detergent within the condenser 1 is gasified and recovered into the storing tank 12. With such an arrangement as above, stain of the detergent can be prevented and a high cleaning capability can be attained and at the same time an amount of residual can be restricted by using detergent having a high volatile characteristic.

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：JPH07285032A

公开(公告)日：1995-10-31

申请号：JP8156794

申请日：1994-04-20

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAKAI TOSHIKAZU

IPC: B23P17/00 ,  C23C18/31 ,  C23C18/34 ,  F04B39/00 ,  F04C29/00

Abstract: PURPOSE:To prevent silicon particles from falling off so as to improve abrasion resistance of aluminum alloy by using aluminum alloy containing the specific % of si li con, machining this into the predetermined shape, forming a nickel- phosphorus plated coating containing the specific % of phosphorus on a sliding face by an electroless plating method, and carrying out finishing. CONSTITUTION:Casting is carried out while using aluminum alloy containing 8-25% by weight of silicon as a raw material, and silicon particles 3 acting as hard particles with the mean particle diameter of 60m are deposited in an aluminum alloy matrix 2 for increasing abrasion resistance. On a sliding face 4, a nickel-phosphorus plated coating 6 containing 5-15% by weight of phosphorus is formed by an electroless plating method after cutting by means of a turning tool is applied, and then, finishing by means of a roller 7 is carried out, and consequently, a sliding member 5 for a compressor is provided. In this way, falling off of the silicon particles 3, which triggers off abnormal abrasion, in the material or excessive plastic deformatioe of the surface layer are prevented, and as a result, abrasion resistance of aluminum alloy is improved.