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Multi-stage compressor, air conditioner system and control method of multi-stage compressor

A technology for compressor and gas control, which is applied in the control of multi-stage compressors, multi-stage compressors and air conditioning systems, and can solve the problems of narrow working condition adaptation range, reduced energy efficiency, and poor adaptability to operating conditions.

Inactive Publication Date: 2016-07-20
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the above-mentioned single-stage variable capacity compressor in the prior art can realize the change of displacement, its energy efficiency is still low under harsh working conditions such as ultra-low temperature, and its working condition adaptability range is narrow
However, the volume ratio of ordinary two-stage enthalpy-increasing compressors cannot be adjusted, resulting in poor adaptability to operating conditions. The energy efficiency will drop sharply again, and the two cannot be balanced

Method used

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  • Multi-stage compressor, air conditioner system and control method of multi-stage compressor
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  • Multi-stage compressor, air conditioner system and control method of multi-stage compressor

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Embodiment 2

[0061] Embodiment 2 Compressor variable capacity principle: the variable capacity control mode of the compressor is realized by controlling the pressure switching of the plug head (see Figure 8 ). When the first solenoid valve 20 is turned on and the second solenoid valve 21 is closed, high pressure is introduced into the head of the plug, and there is a certain pressure difference between the head of the plug and the tail of the plug, and the force generated by the pressure difference will overcome the elastic force of the spring to push the plug Moving toward the tail, at this time the cylinder bypass return flow channel 12 is blocked, and the gas in the cylinder suction cavity will not be able to flow back to the suction port 13, thereby realizing the two-stage operation mode of the multi-stage compressor with large displacement and small volume ratio (see Figure 8 , Figure 13-1 ). When the first solenoid valve 20 is closed and the second solenoid valve 21 is turned on...

Embodiment 3

[0063] Embodiment Three The low-pressure stage cylinder 14 is provided with a bypass hole, an intermediate flow channel, and an enthalpy-increasing port 24 (see Figure 15 ), the bypass port 11 is connected with the control valve 25 and the external pipeline to form a bypass return channel 12, and the gas in the suction chamber of the low-pressure stage cylinder 14 can communicate with the suction line through the bypass return channel 12 (see Figure 14 ). Other parts and structural composition are similar to the first embodiment.

[0064] The variable capacity control mode of the compressor in the third embodiment is realized by controlling the closing and conducting of the control valve 25 (see Figure 14 ). When the control valve 25 is closed and the bypass return passage is blocked, the gas in the suction chamber of the cylinder will not be able to flow back to the suction pipeline, thereby realizing the two-stage operation mode of the multi-stage compressor with large ...

Embodiment 5

[0067] Embodiment 5 Compressor variable capacity principle: the variable capacity control mode of the compressor is realized by controlling the pressure switch of the plug head (see Figure 17 ). When the first solenoid valve 20 is turned on and the second solenoid valve 21 is closed, the head of the plug is introduced with medium pressure, and there is a certain pressure difference between the head of the plug and the tail of the plug, and the force generated by the pressure difference will overcome the elastic force of the spring to push the plug The pin moves in the direction of the tail. At this time, the bypass return channel 12 of the cylinder is blocked, and the gas in the suction chamber of the cylinder will not be able to flow back to the suction port 13, thereby realizing the two-stage operation mode of the multi-stage compressor with large displacement and small volume ratio. (See Figure 17 , Figure 13-1 ). When the first solenoid valve 20 is closed and the sec...

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Abstract

The invention discloses a multi-stage compressor, an air conditioner system and a control method of the multi-stage compressor. The multi-stage compressor comprises at least one high-pressure-stage air cylinder and at least one low-pressure-stage air cylinder (14), wherein a by-pass port (11) is formed in a side wall, which corresponds to an air suction side, of each low-pressure-stage air cylinder (14); each by-pass port (11) communicates with an air suction opening (13) of the corresponding low-pressure-stage air cylinder (14) through a by-pass backflow channel (12); and a control mechanism which controls switch-on and switch-off of air flow is arranged on each by-pass backflow channel (12). By the arrangement, the volume ratio of the multi-stage compressor provided by the invention can be adjusted, and is not fixed any more, therefore, when the compressor runs at loads under different working conditions, the volume ratio of the compressor can be adjusted to be the optimal volume ratio corresponding to the working conditions, and the working condition adaptability of the compressor is good. Compared with the multi-stage compressor with the fixed volume ratio, the multi-stage compressor is better in integral comprehensive energy efficiency.

Description

technical field [0001] The invention relates to the technical field of air conditioning, and more specifically relates to a multistage compressor, an air conditioning system, and a control method for the multistage compressor. Background technique [0002] With the increasing requirements on the energy efficiency of air conditioners worldwide, how to improve the overall energy efficiency of compressors is a technical problem to be solved urgently by those skilled in the art. The existing technology mainly improves the environmental adaptability of the compressor by changing the displacement of the compressor, or adopts a two-stage enthalpy increase technology to improve the capacity and energy efficiency ratio of the compressor under high temperature / low temperature conditions. [0003] The patent documents with application number CN200910178425.0 and application number CN201120255956.8 respectively disclose a compressor with variable capacity. By setting a bypass hole on th...

Claims

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Application Information

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IPC IPC(8): F04C23/00F04C29/00F04C28/24F04C28/26F04C28/18
CPCF04C23/00F04C28/18F04C28/24F04C28/26F04C29/00
Inventor 黄辉吴健胡余生魏会军杨欧翔陈圣罗惠芳邹鹏柯达俊陈瑞祥尚文海
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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