Sealed compressor and refrigeration device

Patent metadata

Field	Value
Publication number	US-2017009755-A1
Application number	US-201515117721-A
Country	US
Kind code	A1
Filing date	Apr 22, 2015
Priority date	May 7, 2014
Publication date	Jan 12, 2017
Grant date	—

Abstract

In a sealed compressor, electrically-operated element ( 104 ) and compressive element ( 106 ) driven by electrically-operated element ( 104 ) are housed in the inside of sealed container ( 102 ). Compressive element ( 106 ) includes shaft ( 126 ) formed of main shaft ( 136 ) and eccentric shaft ( 134 ), and cylinder block ( 128 ) having; bearing ( 144 ) which pivotally supports main shaft ( 136 ) of shaft ( 126 ); and cylinder ( 142 ). Further, the compressive element ( 106 ) includes piston ( 130 ) which is movable in the cylinder ( 142 ) in a reciprocating manner, and connecting portion ( 132 ) which connects eccentric shaft ( 134 ) and piston ( 130 ) to each other. Electrically-operated element ( 104 ) is formed of an outer-rotor-type motor which includes stator ( 150 ), and rotor ( 152 ) which is disposed coaxially with stator ( 150 ) so as to surround an outer periphery of stator ( 150 ). Further, non-sliding portion ( 146 ) is provided between main shaft ( 136 ) and bearing ( 144 ), and stator ( 150 ) is fixed to outer peripheral portion ( 162 ) of bearing ( 144 ) which corresponds to non-sliding portion ( 146 ).

First claim

1 . A sealed compressor, wherein an electrically-operated element and a compressive element driven by the electrically-operated element are housed in a sealed container,
the compressive element includes:
a shaft having a main shaft and an eccentric shaft;
a cylinder block including: a bearing which pivotally supports the main shaft of the shaft; and a cylinder;
a piston which is movable in the cylinder in a reciprocating manner; and
a connecting portion which connects the eccentric shaft and the piston to each other,
the electrically-operated element is formed of an outer-rotor-type motor which includes: a stator; and a rotor which is disposed coaxially with the stator so as to surround an outer periphery of the stator, a non-sliding portion is provided between the main shaft and the bearing, and the stator is fixed to an outer peripheral portion of the bearing which corresponds to the non-sliding portion.

2 . The sealed compressor according to claim 1 , wherein a length of the non-sliding portion is set larger than a fixing margin where the stator is fixed to the outer peripheral portion of the bearing.

3 . The sealed compressor according to claim 1 , wherein the non-sliding portion formed by increasing an inner diameter of the bearing is formed on a portion of the sliding portion of the bearing.

4 . The sealed compressor according to claim 1 , wherein the non-sliding portion where an outer diameter of the main shaft is formed with a narrowed outer diameter is provided to a portion of the sliding portion of the main shaft, and the non-sliding portion is formed between an upper end and a lower end of the bearing.

5 . A refrigeration device comprising a refrigerant circuit formed by annularly connecting a compressor, a heat-radiator, a pressure reduction device and a heat absorbing device to each other by pipes, wherein the compressor is the sealed compressor according to claim 1 .

6 . A sealed compressor, comprising:
a shaft having a main shaft and an eccentric shaft; a bearing which pivotally supports the main shaft of the shaft; a cylinder; a piston which is movable in the cylinder in a reciprocating manner; a connecting portion which connects the eccentric shaft and the piston to each other, a non-sliding portion which is provided between the main shaft and the bearing; and an outer-rotor-type motor including:
a stator which is fixed to an outer peripheral portion of the bearing which corresponds to the non-sliding portion.; and
a rotor which is disposed coaxially with the stator so as to surround an outer periphery of the stator.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yanase Seigo

Classifications

• F04B35/04 Primary

  the means being electric · CPC title

• F04B39/0005

  adaptations of pistons · CPC title

• F25D2317/0665

  from the top · CPC title

• F25D11/00

  Self-contained movable devices, e.g. domestic refrigerators · CPC title

• F04B39/00

  Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 · CPC title