公开(公告)号：JPH05164049A

公开(公告)日：1993-06-29

申请号：JP33311191

申请日：1991-12-17

Applicant: MATSUSHITA REFRIGERATION

Inventor： WADA SATOSHI ,  KAWAI HIDEKI ,  SAEKI YUJI ,  OZAKA MASAHIKO

IPC: F04B39/10

Abstract: PURPOSE:To improve a volumetric efficiency by using a spherical delivery valve, and also reduce noise in a valve device of a reciprocating compressor used in a refrigerator and so on. CONSTITUTION:A valve device for a reciprocating compressor is composed of a recess part 21 formed in a valve plate 4, a resinous sheet 22 fitted in the recess part 21, a delivery valve seat 24 arranged on the sheet 22, a spherical delivery valve 25, a valve presser 26 having an inner surface shape in conformity with a shape of the delivery valve 25, a coil spring 27 and a holder 28 into which the delivery valve 25, the valve presser 26 and the coil spring 27 are embedded/inserted.

公开(公告)号：JPH05141356A

公开(公告)日：1993-06-08

申请号：JP30161091

申请日：1991-11-18

Applicant: MATSUSHITA REFRIGERATION

Inventor： MANGYO MASAO ,  KAWAI HIDEKI ,  SAEKI YUJI ,  WADA SATOSHI ,  OZAKA MASAHIKO

IPC: F04B39/00

Abstract: PURPOSE:To provide a compressor wherein efficiency is stabilized through stabilization of the size of a gap between a stator and a rotor and there is no need for a different part, except a block, in order to contain a rolling bearing (a ball bearing or a roller bearing). CONSTITUTION:A crank shaft 24, a ball bearing 25a by which a the crank shaft is axially supported, and a block 26 by which the bearing is supported are provided. The block is a bowl-form iron plate molded product or cast iron casting and provided at its central part with a bearing holding part 27. Further, the crank shaft 24 forms straddle mounted structure by means of other bearing holding part 30 and other rolling bearing.

公开(公告)号：JPH04311686A

公开(公告)日：1992-11-04

申请号：JP7919991

申请日：1991-04-11

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAEKI YUJI ,  YUMOTO TAKASHI ,  TAKEMURA JIRO ,  ONO TAKESHI ,  KITA ICHIRO ,  YAHIKI JIYUNICHIROU

IPC: F04B39/00

Abstract: PURPOSE:To reduce noise generated from the piping of a cooling system or the like due to the flow fluctuation (pulsation) of compressed refrigerant gas. CONSTITUTION:At the time of connecting a discharge line 13 to a discharge pipe 14, pulse suppressing material is provided inside the discharge line 13.

公开(公告)号：JPH03258994A

公开(公告)日：1991-11-19

申请号：JP5527490

申请日：1990-03-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAEKI YUJI

IPC: F04C29/12 ,  F04C29/00 ,  F04C29/04

Abstract: PURPOSE:To reduce the heating of an inlet coolant gas and improve the capacity efficiency of a compressor by providing a nearly cylindrical heat insulating plate having at least one end formed into trumpet shape in the inside of an inlet pipe airtighlty fixed to a compression element and a sealed vessel. CONSTITUTION:An electric element 2 and a compression element 4 are received in a sealed vessel 1. An inlet pipe 7 airtightly fixed to the compression element 4 and the sealed vessel 1 is provided. A nearly cylindrical heat insulating plate 15 having at least one end formed into trumpet shape is provided in the inside of the inlet pipe 7. As a heat insulating air layer is formed between the inlet pipe 7 and the heat insulating plate 15, thus, the heat transfer from the sealed vessel 1, the compression element 4 and a high temperature and high pressure gas to the inlet pipe 7 can be reduced. Hence, the heating of the inlet coolant gas can be reduced, so that the capacity efficiency of the compressor can be improved.

公开(公告)号：JPH03189395A

公开(公告)日：1991-08-19

申请号：JP32795089

申请日：1989-12-18

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI ,  ARIMIZU KOJI ,  SAEKI YUJI

IPC: F04C29/00 ,  F04C29/06

Abstract: PURPOSE:To provide an effect to reduce the generation of noise and an input by providing a communicating passage, having the one end opened in a compression chamber and the other end opened in a vane groove, in the vicinity of a vane on the compression chamber side on the high pressure side. CONSTITUTION:Pressure pulsation generated in a compression chamber 6 due to re- expansion by a delivery notch part 14 and a delivery hole 15 is reduced end offset in a way that pressure pulsation is generated through re-expansion of a communicating passage 17. Further, freezer oil present in the compression chamber 6 flows in the passage 17, and an amount of delivered freezer oil is reduced to reduce opportunity of collision of freezer oil. Since along with rotation of a crank shaft 4, the back pressure of refrigerant gas is exerted on freezer oil of which the passage 17 is full right after the starting of delivery, the freezer oil gradually flows out through an opening part on the vane groove 8 side of the passage 17. Further, by applying a side pressure on a vane 9 through the opening part on the groove 8 side of the passage 17, the vane 9 is prevented from the occurrence of metallic contact at an edge part 18a on the high pressure side on the opposition roller side and an edge part 18b on the low pressure side on the roller side of the groove 8, and the vane 9 is pressed against the surface on the low pressure side of the groove 8.

公开(公告)号：JPH03175194A

公开(公告)日：1991-07-30

申请号：JP31615489

申请日：1989-12-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： OZAKA MASAHIKO ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI ,  SAEKI YUJI ,  OTA TOSHIHIKO ,  ARIMIZU KOJI

IPC: F04C29/04 ,  F04C29/00

Abstract: PURPOSE:To improve refrigerating capacity and performance index by providing a heat pipe of which one end is inserted into at least one of a cylinder, a rotor side housing, or an anti-rotor side housing, and the other end is exposed outside an enclosed vessel. CONSTITUTION:One end of a heat pipe 19 is inserted into the inserting hole 16 of a cylinder 19, and the other end is exposed outside an enclosed vessel 17. The enclosed vessel 17 and the heat pipe 19 are connected with each other airtightly and contactedly, the inside and the outside of the enclosed vessel 17 are fluidly distinguished from each other, and further thermal refrigerant fluid is enclosed in the heat pipe 19. In such constitution, at operating an enclosed type compressor, heat exchange such that the thermal refrigerant fluid in the heat pipe 19 absorbs heat from the atmosphere 1a within the enclosed vessel 17 and from a compression mechanism part 4 especially a compression chamber 5, and releases the heat outside the enclosed vessel 17, can be performed with large cooling effect by utilizing natural convection. Consequently, by reducing receiving loss of heat of refrigerant in the compression chamber 5, refrigerating capacity is improved and performance index is hightened.

公开(公告)号：JPH03115558A

公开(公告)日：1991-05-16

申请号：JP25273489

申请日：1989-09-27

Applicant: MATSUSHITA REFRIGERATION

Inventor： ARIMIZU KOJI ,  KAWAI HIDEKI ,  NISHIHARA HIDETOSHI ,  OZAKA MASAHIKO ,  SAEKI YUJI

IPC: F04C29/00 ,  C23C8/04 ,  C23C8/26 ,  F04C18/356

Abstract: PURPOSE:To make surface treatment of the vanes with good workability by housing the vanes into a case provided with plural pieces of housing grooves to fit tightly to the side faces of the vanes and exposing the front ends thereof, then, subjecting the vanes to a nitriding treatment. CONSTITUTION:The front ends of the vanes 1 of a rotary compressor of a rotary piston type are subjected to the nitriding treatment. Plural pieces of the housing grooves 4 for housing the vanes are provided in the case 3 for the surface treatment in the above-mentioned surface treatment method. The housing grooves 4 are constituted of four side walls 4c which tightly fit to 4 side faces 1c exclusive of the exposed parts 4a at the front ends of the vanes, the front ends 1a of the vanes 1 and the bases 1b facing the same, as well as the bases 4b. The vanes 1 are housed into this case 3 and while the above- mentioned front ends 1a are held exposed, these parts are subjected to the nitriding treatment. The vanes 1 are set in a short period of time without damaging the vanes and only the front ends 1a are subjected to the nitriding treatment.

公开(公告)号：JPH0375450A

公开(公告)日：1991-03-29

申请号：JP21330589

申请日：1989-08-18

Applicant: MATSUSHITA REFRIGERATION

Inventor： NISHIHARA HIDETOSHI ,  KAWAI HIDEKI ,  OZAKA MASAHIKO ,  ARIMIZU KOJI ,  SAEKI YUJI

IPC: F04C29/00 ,  F25B1/04

Abstract: PURPOSE:To obtain a highly efficient and low cost refrigeration cycle system by providing the system with a check valve between a vaporizer and a compressor and providing a rotary compressor with a permanent capacitor type driving motor. CONSTITUTION:A check valve 6 is provided between a vaporizer 4 and a compressor 19 and a permanent capacitor type motor is used as the driving motor 20 of the rotary compressor 19. When the rotary compressor 19 starts to operate, the check valve 6 which is a fluid control valve is opened by the pressure of a refrigerant and the compressed refrigerant is circulated constituting a normal refrigeration cycle from a condenser 2 through a capillary tube 3 and a vaporizer 4 to a rotary compressor 19. When the operation of the rotary compressor 19 is stopped, the check valve 6 is closed and the counterflow of a heated high pressure gas toward the vaporizer 4 is obstructed. Thus, a low cost and highly efficient refrigeration cycle system can be obtained.

公开(公告)号：JPS6397882A

公开(公告)日：1988-04-28

申请号：JP24347686

申请日：1986-10-14

Applicant: MATSUSHITA REFRIGERATION

Inventor： SAEKI YUJI

IPC: F04B39/00

Abstract: PURPOSE:To prevent a protective device from malfunctioning, by forming a projecting part, covering the motor protective device from the upside, in a casing constituting a compressor part. CONSTITUTION:A projection 14, which covers the motor protective device 5 installed on the upper end face of a coil end 4 of a stator 2 for a motor 1 from the upside, is installed there. The refrigerating machine oil 11 fed by an oil feed pipe 9 is heated after lubricating a sliding part and cooling each high temperature part of a cylinder 8 and a cylinder head 13, guided to the lower part by way of a casing 6 and dropped down, but since there is the projection 14, this refrigerating machine oil is in no case directly dripped on the motor protective device 5. Therefore, a malfunction of the motor protective device is preventable.

公开(公告)号：JPS6366813A

公开(公告)日：1988-03-25

申请号：JP21230286

申请日：1986-09-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： MIYOSHI KYOZO ,  SAEKI YUJI ,  FUJII YASUHIKO

IPC: H01H37/68 ,  H01H37/76