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Multi-compressor refrigerant circulation system and control method thereof

A circulating system, multi-compressor technology, applied in compressors, refrigerators, refrigeration components, etc., can solve the problem of unbalanced oil return, inaccurate control of oil return balance, affecting the operation stability of the multi-compressor refrigerant circulation system, etc. problems, to ensure normal and reliable operation and improve operation stability.

Pending Publication Date: 2022-05-13
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +2
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Problems solved by technology

Although this method can improve the oil return balance of different compressors, this method can only roughly estimate the oil volume of the compressor based on the oil temperature, and there may still be unbalanced oil return when the oil temperature is normal, resulting in oil return balance Inaccurate regulation affects the operation stability of the multi-compressor refrigerant cycle system

Method used

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  • Multi-compressor refrigerant circulation system and control method thereof
  • Multi-compressor refrigerant circulation system and control method thereof
  • Multi-compressor refrigerant circulation system and control method thereof

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Embodiment Construction

[0056] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0057] It should be noted that the technical solutions of the various embodiments of the present invention can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered as The combination of technical solutions does not exist, nor is it within the scope of protection required by the present invention.

[0058] figure 1 Shown is a partial structural schematic diagram of an embodiment of the multi-compressor refrigerant circulation system of the present invention. Specifically, this embodiment is a multi-compressor refrigerant cycle system composed of three compressors connected in parallel.

[0059] Su...

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Abstract

The invention discloses a multi-compressor refrigerant circulation system and a control method thereof, and the method comprises the steps: when a plurality of compressors in the system are in a running state, obtaining the current oil temperature of each compressor in the running state in real time, and comparing the current oil temperature with a corresponding oil temperature threshold value of the compressor; when the number of the compressors with the current oil temperature not higher than the corresponding oil temperature threshold value is not smaller than two, the current operation frequency of each compressor with the current oil temperature not higher than the corresponding oil temperature threshold value is obtained; determining the current oil demand of the corresponding compressor based on the current operating frequency and the current oil temperature; all the obtained current oil demand quantities are sequenced according to the size sequence; and determining the state of the controllable valve connected with each compressor according to the sequence. By applying the method, the precision of oil return control of the multiple compressors can be improved, and the operation stability of a refrigerant circulating system is improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, specifically relates to a refrigerant circulation system, more specifically relates to a multi-compressor refrigerant circulation system and a control method thereof. Background technique [0002] In the multi-split system, the outdoor unit is connected to multiple indoor units. Due to the relatively large difference in the load of the indoor unit, sometimes the indoor unit is rarely turned on, and sometimes the indoor unit is fully turned on. In order to adapt to different load requirements and achieve energy saving to the greatest extent, more than two compressors are usually installed in parallel in the outdoor unit to form a multi-compressor refrigerant system, and one or more compressors can be selected according to the load of the indoor unit The compressor is running. [0003] In the multi-compressor refrigerant circulation system with multiple compressors connected in parallel, a ...

Claims

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Application Information

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IPC IPC(8): F24F11/30F24F11/64F24F11/70F24F11/61F25B49/02F25B31/00F25B41/20
CPCF24F11/30F24F11/64F24F11/70F24F11/61F25B49/02F25B31/004F25B41/20Y02B30/70
Inventor 国德防毛守博时斌禚百田程绍江张锐钢王军高玉辉
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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