Multi-cylinder rotary compressor and refrigeration circulation device

A rotary compressor, multi-cylinder technology, applied to rotary piston/oscillating piston pump components, rotary piston/oscillating piston pump combinations for elastic fluids, components of pumping devices for elastic fluids In other directions, it can solve the problems of labor-intensive production, difficult chuck fixing, and high machining accuracy, and achieve the effects of reducing parts costs, realizing refrigeration cycle efficiency, and improving manufacturability and machining accuracy.

CN102102669BActive Publication Date: 2014-08-06TOSHIBA CARRIER CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-08-06

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Abstract

The present invention relates to a multi-cylinder rotary compressor and a refrigeration circulation device, wherein the multi-cylinder rotary compressor can realize improvement of manufacturing performance and machining precision. The refrigeration circulation device comprises the multi-cylinder rotary compressor for realizing increase of the refrigeration circulation efficiency. In the multi-cylinder rotary compressor (C), a first cylinder (6A) and a second cylinder (6B) which are separated by a middle baffle (2) are provided as a compression mechanism part (3). Cylinder chambers (Sa,Sb) for introducing low-pressure gas are provided at the inner-diameter part. The blade back chambers (11a,11b) are provided on each cylinder chamber through blade grooves (10a,10b) which movably accommodate the blades (12a,12b). The first blade back chamber comprises a spring component (13) which exerts an elastic force to the back end of the blade and causes the front end of the blade to contact with a circumferential wall of a roller (9a). The second blade back chamber is closed by a closing component (15) and a middle baffle, wherein the closing component is formed separately from the auxiliary bearing. The closing component is connected with a pressure control pipe (16) for switching the high-pressure gas and the low-pressure gas for supplying, and is also provided with a guiding path (17) for communicating the closing component with the second blade back chamber.
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Description

Technical field

[0001] The present invention relates to a multi-cylinder rotary compressor with switchable compression capability and a refrigeration cycle device including the multi-cylinder rotary compressor to form a refrigeration cycle. Background technique

[0002] In refrigeration cycle devices, multi-cylinder rotary compressors including a plurality of (mainly two) cylinder chambers in the compression mechanism are often used. In this type of compressor, it is advantageous if it can switch between full-capacity operation and half-capacity operation. Among them, full-capacity operation refers to simultaneous compression in multiple cylinder chambers, and half-capacity operation is Refers to performing compression in one cylinder chamber and stopping compression in the other cylinder chamber to reduce compression work.

[0003] The multi-cylinder compressor (variable capacity type rotary compressor) disclosed in Patent Document 1 includes: a roller (rotating piston) that rota...

Examples

Embodiment Construction

[0079] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0080] figure 1 It is a figure which shows the schematic cross-sectional structure of the multi-cylinder rotary compressor C of 1st Embodiment, and the refrigeration cycle structure of the refrigeration cycle apparatus R including this multi-cylinder rotary compressor C.

[0081] First, the description starts with the multi-cylinder rotary compressor C. The symbol 1 is a closed casing. The compression mechanism section 3 is provided in the lower part of the closed container 1 and the electric motor section 4 is provided in the upper part. The motor part 4 and the compression mechanism part 3 are integrally connected by a rotating shaft 5.

[0082] The compression mechanism section 3 includes a first cylinder 6A on the upper side and a second cylinder 6B on the lower side. A main bearing 7A is installed and fixed to the upper end surface of the first cylinder 6A, and a sub bearing 7B i...