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Air conditioner oil return control method and device

A technology of oil return control and air conditioning, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc. It can solve the problems of the electronic expansion valve opening of the refrigeration internal unit becoming smaller and the compressor affecting oil return, etc., to prevent overcurrent, The effect of preventing rapid oil return

Pending Publication Date: 2018-10-02
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0004] This application provides an oil return control method and device for an air conditioner to solve the problem that in the related art, when the heat recovery multi-unit is returning oil, the opening of the electronic expansion valve of the refrigeration internal unit becomes smaller, causing the compressor to overcurrent and affect the oil return. The problem

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  • Air conditioner oil return control method and device
  • Air conditioner oil return control method and device
  • Air conditioner oil return control method and device

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[0021] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0023] It should be noted that the terms "first" and "second...

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Abstract

The invention discloses an air conditioner oil return control method and device. The method comprises the steps that whether a multi-connected air-conditioning system meets the oil return condition ornot is detected; when it is detected that the multi-connected air-conditioning system meets the oil return condition, the operation frequency of a compressor of the multi-connected air-conditioning system is adjusted to the preset frequency; and in the process that the operation frequency of the compressor is adjusted to the preset frequency, the opening degree of a valve of an inner unit, in therefrigeration mode, of the multi-connected air-conditioning system is adjusted to the preset opening degree from the current opening degree so that oil return control can be conducted on the multi-connected air-conditioning system, and the preset opening degree is larger than the current opening degree. Through the air conditioner oil return control method and device, the problem that in relatedtechnologies, when a heat recovery multi-connected unit conducts oil return, the opening degree of an electronic expansion valve of a refrigeration inner unit is decreased, thus, compressor overflowing is caused, and oil return is influenced is solved.

Description

technical field [0001] The present application relates to the field of air conditioner oil return control, and in particular, relates to an air conditioner oil return control method and device. Background technique [0002] At present, when the heat recovery multi-connected unit is returning oil, multiple internal units need to be converted to cooling mode. When the heating internal unit is converted to cooling mode, the opening of the electronic expansion valve becomes smaller, and the electronic expansion valve of the cooling internal The opening is controlled according to the superheat of the refrigerant in the internal unit, and the opening becomes smaller. Because the opening of the electronic expansion valve of the refrigeration internal unit is too small, the compressor cannot absorb the refrigerant, the pressure at the low-pressure end becomes lower, and the high and low pressure difference between the two ends of the compressor If it becomes larger, it will eventual...

Claims

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Application Information

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IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/004F25B49/022F25B2600/02
Inventor 耿媛媛卢浩贤何林张威
Owner GREE ELECTRIC APPLIANCES INC
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