US 12,392,341 B2Granted

Compressor

AssigneeMitsubishi Heavy Industries Thermal Systems, Ltd.

InventorsNoriaki Arashi, Ichiro Yogo, Yuki Ichise

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Abstract

An embodiment includes: a cylindrical motor case surrounding a compression mechanism about an axis; a lower case closing an opening of the motor case, fitted to an inner circumferential face of the motor case, and defining an accommodation chamber between the motor case and the lower case where a refrigerant is introduced; a first O-ring provided about the axis at a facing portion where the motor case and the lower case fitted to each other face each other in a plane; and a second O-ring provided about the axis in the facing portion, the first O-ring is provided at a position closer to a starting point on the accommodation chamber side of the facing portion than the second O-ring, the first O-ring has better refrigerant resistance and/or oil resistance than the second O-ring, and the second O-ring has better sealing performance than the first O-ring at a temperature of −20° C. or lower.

Claims5

Dependent claims

A compressor comprising:

a cylindrical main case surrounding a compression mechanism about an axis, the compression mechanism being configured to compress a refrigerant;
a sub-case closing an opening of the main case in a direction of the axis, fitted to an inner circumferential face or an outer circumferential face of the main case, and defining a space between the main case and the sub-case, the refrigerant being introduced to the space;
an annular first seal member provided about the axis at a facing portion where the main case and the sub-case fitted to each other face each other in a plane;
and
an annular second seal member provided about the axis in the facing portion,
wherein the first seal member is provided at a position closer to a starting point on the space side of the facing portion than the second seal member,
wherein the first seal member has better refrigerant resistance and/or oil resistance than the second seal member, and
wherein the second seal member has better sealing performance than the first seal member at a temperature of −20° C. or lower.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/852,562Filed 21 Apr 2023
Priority: JP 2022-07017321 Apr 2022
Published: US 2025/0101982 A127 Mar 2025
Granted: 19 Aug 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

F04B 39/121
Casings; Cylinders; Cylinder heads; Fluid connections: casings
F04C 27/001
Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids: radial sealings for working fluid
F04B 39/00
Component parts, details, or accessories, of pumps or pumping systems specially adapted
F04C 18/0215
Both members having co-operating elements in spiral form: where only one member is moving