Variable-capacity rotary compressor and refrigeration cycle device

A rotary compressor and compression mechanism technology, applied in the field of rotary compressors, can solve the problems of three-way valve prone to failure, high cost, complex structure, etc., achieve simple and reliable variable capacity control method, low cost, and improve APF Effect

Pending Publication Date: 2021-06-01
GUANGDONG MEIZHI COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The variable capacity rotary compressor in the related art usually uses a three-way valve or two two-way valves to realize the variable capacity function, the cost is high, the structure is relatively complicated, and the three-way valve is prone to failure

Method used

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  • Variable-capacity rotary compressor and refrigeration cycle device
  • Variable-capacity rotary compressor and refrigeration cycle device
  • Variable-capacity rotary compressor and refrigeration cycle device

Examples

Experimental program
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Embodiment Construction

[0033] Embodiments of the invention will be described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] The following is based on Figure 1-Figure 6 The variable displacement rotary compressor 1 of the embodiment of the present invention will be described.

[0035] A variable displacement rotary compressor 1 according to an embodiment of the present invention includes a casing 2 , a compression mechanism part 5 and a motor 4 . Wherein, the casing 2 defines a sealed cavity, and the compression mechanism part 5 and the motor 4 are both arranged in the sealed cavity. The motor 4 provides driving force to the compression mechanism unit 5 . A suction pipe 8 is connected to the side wall of the casing 2 . The casing 2 is also connected with an exhaust pipe...

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Abstract

The invention provides a variable-capacity rotary compressor and a refrigeration cycle device. According to the variable-capacity rotary compressor, a communicating pipe for communicating a sealing cavity of a shell with a compressed gas inlet of a second gas cylinder is arranged, and communication or cutoff of the communicating pipe can be achieved by opening or closing a communicating valve on the communicating pipe. When the communicating valve is opened, a second sliding piece pushes and presses a second piston under the action of gas pressure, and therefore the second gas cylinder can operate; and when the communicating valve is closed, due to the fact that the second sliding piece cannot push and press the second piston, the second gas cylinder can be stopped. Therefore, operation or cylinder stop of the second gas cylinder can be controlled by opening or closing the communicating valve, and then capacity control over the variable-capacity rotary compressor is achieved. The variable-capacity rotary compressor is simple in structure, low in cost and high in APF, and a variable-capacity control method is simple and reliable.

Description

technical field [0001] The invention belongs to the technical field of rotary compressors, in particular to a variable capacity rotary compressor and a refrigeration cycle device. Background technique [0002] In the related art, the rotary compressor can regulate the cooling capacity of the compressor by controlling the motor speed, but as the characteristics of the motor and the compression mechanism, the efficiency is the highest at the middle speed of 40rps-70rps. Therefore, a double-cylinder variable-capacity variable-frequency rotary compressor is designed to improve the comfort of the air conditioner and the annual energy consumption efficiency (APF). The displacement of the two cylinders is generally designed to be the same. When the compressor is running Two modes of capacity control can be performed between 100% and 50% to deactivate or deactivate one cylinder. The variable capacity rotary compressor in the related art usually uses a three-way valve or two two-way...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/356F04C23/00F04C23/02F04C29/12F04C28/02F04C28/06
CPCF04C18/3562F04C23/001F04C23/02F04C28/02F04C28/065F04C29/124
Inventor 小津政雄吴延平
Owner GUANGDONG MEIZHI COMPRESSOR
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