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Method and device of oil return control of air conditioner and air conditioner

A technology of oil return control and air conditioner, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc. It can solve the problems of oil shortage and damage of compressors, and achieve the effect of extending the life of compressors

Active Publication Date: 2015-01-07
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide an air conditioner oil return control method, device and air conditioner to solve the problem in the prior art that the compressor is easily damaged due to lack of oil when the refrigerant is running at low speed

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  • Method and device of oil return control of air conditioner and air conditioner
  • Method and device of oil return control of air conditioner and air conditioner
  • Method and device of oil return control of air conditioner and air conditioner

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Embodiment Construction

[0029] 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 invention will be described in detail below with reference to the accompanying drawings and examples.

[0030] figure 1 is a schematic diagram of the oil return control device according to the first embodiment of the present invention, such as figure 1 As shown, the oil return control device of this embodiment includes: a detection module 10 , a comparison module 20 and a control module 30 .

[0031] The detection module is used to detect the flow velocity v of the refrigerant in the oil return pipeline. Specifically, including the flow velocity v of the refrigerant in the vertical pipe of the oil return pipeline 1 and the flow velocity v of the refrigerant in the horizontal tube of the oil return pipeline 2 , velocity v 1 and velocity v 2 It can reflect the oil return situation of the lubr...

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Abstract

The invention discloses a method and a device of oil return control of an air conditioner and the air conditioner. The method of the oil return control of the air conditioner comprises the following steps: detecting flow velocity v of refrigerating fluid in an oil return pipe, comparing the flow velocity v with preset flow velocity v <min>, wherein the preset flow velocity v <min> is the minimum flow velocity which is needed when the air conditioner returns oil; and when the flow velocity v is judged to be smaller than or equal to the flow velocity v <min>, the air conditioner is controlled to carry out an oil return treatment. By the adoption of the method and the device of the oil return control of the air conditioner and the air conditioner, the problem that when the refrigerating fluid operates in slow speed, a compressor is easy to damage caused by fuel starvation in the prior art can be solved, so that the effect that the service life of the compressor is prolonged is achieved.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an oil return control method and device for an air conditioner and an air conditioner. Background technique [0002] When the air conditioning system is running, part of the lubricating oil will be discharged from the compressor together with the refrigerant and enter the system piping, condenser and evaporator. Dynamic balance can ensure that the compressor does not lack oil. Otherwise, the oil level will drop, and the compressor will burn out due to lack of oil. Therefore, a certain amount of oil storage is the most basic condition to ensure the reliable operation of the compressor. Only when the oil storage exceeds the minimum amount of oil required can the safe and reliable operation of the compressor be guaranteed. The oil storage capacity of the compressor is mainly determined by the oil discharge volume and oil return volume of the compressor. The larger the oil discharg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B31/00F25B49/02
Inventor 沈军胡强陈振松
Owner GREE ELECTRIC APPLIANCES INC
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