Compressor oil return device, air conditioning system and oil return control method

An air-conditioning system and compressor technology, which is applied in compressors, refrigerators, refrigeration components, etc., can solve the problems of difficult oil return of lubricating oil and high oil discharge rate of compression cylinders, so as to meet the requirements of oil return, prevent gas leakage, and improve service life. The effect of longevity and ease of use

Pending Publication Date: 2021-01-08
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the above-mentioned technical problems or at least partly solve the above-mentioned technical problems, the present application provides a method to solve the problems of high oil discharge rate in the compression cylinder and difficulty in lubricating oil return caused by the direct exhaust of the double-suction double-row compressor in-line cylinder. Compressor oil return device, air conditioning system and oil return control method

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  • Compressor oil return device, air conditioning system and oil return control method
  • Compressor oil return device, air conditioning system and oil return control method
  • Compressor oil return device, air conditioning system and oil return control method

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Embodiment 1

[0041] Such as Figure 1-2 As shown, in this embodiment, the present invention provides a compressor oil return device, including: a double-suction double-row compressor 1, an oil separator 12 connected to the double-suction double-row compressor 1, and an oil return assembly, wherein , the oil return assembly includes an oil return valve 11 and a connecting pipe. The oil return valve 11 has open conduction (the diameter is the same as the connecting pipe, and the resistance is small, and is suitable for the cooling operation mode of the dual-temperature system) and closed throttling (the diameter is smaller than The connecting pipe has a large resistance and is suitable for two states of the dual-temperature system (heating operation mode). The determination of the diameter of the oil return valve 11 when it is closed needs to meet the normal oil return under different exhaust pressure differences, and also to prevent cross-gas between the two exhaust gases.

[0042] In this...

Embodiment 2

[0047] Such as Figure 3-5 As shown, in this embodiment, the present invention provides an air conditioning system, including a compressor oil return device, an outdoor heat exchanger 4, a first indoor heat exchanger 8 and a second indoor heat exchanger 9, double suction and double row The compressor 1 is respectively connected with the first four-way valve 2 and the second four-way valve 3 through pipelines, the oil separator 12 is connected with the second four-way valve 3, and the first four-way valve 2 is connected with the first indoor heat exchange valve respectively. 8 and the outdoor heat exchanger 4, the second four-way valve 3 is connected with the outdoor heat exchanger 4 and the second indoor heat exchanger 9 respectively, and the outdoor heat exchanger 4 is respectively connected with the first indoor heat exchanger 8 and the second indoor heat exchanger 9 through pipelines. The second indoor heat exchanger 9 is connected; the first indoor heat exchanger 8 and the...

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Abstract

The invention relates to a compressor oil return device, an air conditioning system and an oil return control method. The compressor oil return device comprises a double-suction double-exhaust compressor, and an oil separator and an oil return component which are connected to the double-suction double-exhaust compressor, wherein the oil return component comprises an oil return valve and a connecting pipe; the oil return valve comprises a valve body, a valve needle, a fixed block and a sliding block; the fixed block is fixedly connected into the valve body; the fixed block divides the valve body into an upper cavity and a lower cavity; the sliding block is arranged in the lower cavity and located below the fixed block; a middle cavity is arranged between the sliding block and the fixed block; a flow channel communicated with the upper cavity and the lower cavity is arranged in the middle cavity; and the valve needle matched with the flow channel is arranged under the flow channel. The length of the valve needle extending into the flow channel is changed through vertical sliding of the sliding block in order to achieve adjustment of the oil return amount. The oil return valve is simple in structure, low in manufacturing cost and convenient to use, the problems of high oil discharge rate and difficult lubricating oil return in a direct exhaust compression cylinder of the double-suction double-exhaust compressor can be effectively solved, the abrasion of the compressor is reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of air-conditioning systems, in particular to an oil return device for a compressor, an air-conditioning system and an oil return control method. Background technique [0002] Existing air-conditioning systems usually use a single-suction single-row compressor, which forms a refrigeration cycle with indoor and outdoor single-row or multi-row heat exchangers to heat or cool indoor air to meet the comfort requirements of the indoor environment. Commonly used air conditioning systems can only achieve one evaporation temperature and condensation temperature because the compressor has only one pair of suction and exhaust ports connected to the indoor and outdoor heat exchangers. [0003] The invention with the Chinese patent application number CN105444453A proposes a dual-temperature refrigeration and heating system, which uses a dual-temperature air-conditioning system with dual-cylinder parallel compressors to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B43/02F25B41/40F25B49/02F25B31/00
CPCF25B43/02F25B49/02F25B31/004F25B2700/21155
Inventor 吕如兵郑波梁祥飞黄健贵
Owner GREE ELECTRIC APPLIANCES INC
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