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Double-compressor refrigerant circulation system and control method thereof

A circulation system and dual compressor technology, applied in the direction of compressors, compressors, irreversible cycle compressors, etc., can solve the problems affecting the operation stability of the dual compressor refrigerant circulation system, inaccurate oil return regulation, and inaccurate oil return. Balance and other issues, to achieve the effect of ensuring normal and reliable operation, improving operation stability, and precise oil return balance control

Pending Publication Date: 2022-04-15
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, but it cannot be balanced , leading to inaccurate regulation of oil return and affecting the operation stability of the dual-compressor refrigerant circulation system

Method used

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

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Embodiment Construction

[0061] 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.

[0062] 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.

[0063] figure 1 Shown is a partial structural schematic diagram of an embodiment of the dual-compressor refrigerant circulation system of the present invention.

[0064] Such as figure 1 As shown, the first compressor 101 and the second compressor 106 of the dual-compressor refrigerant cycle system are...

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Abstract

The invention discloses a double-compressor refrigerant circulation system and a control method thereof.The method comprises the steps that when a first compressor and a second compressor both operate, the current oil temperatures of the two compressors are obtained in real time; when the current oil temperatures of the two compressors are not higher than the corresponding oil temperature threshold values, the current oil demand of the first compressor and the current oil demand of the second compressor are determined based on the current oil temperatures and the current operation frequency; and controlling a first controllable valve and a second controllable valve according to the current oil demand of the first compressor and the current oil demand of the second compressor. By applying the invention, the precision of oil return control of the double 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, and in particular relates to a refrigerant circulation system, and more specifically relates to a double-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 maximize energy saving, two compressors are usually installed in parallel in the outdoor unit, and one of the compressors can be selected to operate or both compressors can be operated at the same time according to the load of the indoor unit. [0003] In the dual-compressor refrigerant circulation system in which two compressors are connected in parallel, a key problem is the oil return ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B31/00F25B41/20F25B49/02
CPCY02B30/70
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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