Return oil control method for air conditioner

A technology of oil return control and air conditioner, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., and can solve problems such as poor oil return of fixed-frequency compressors

Active Publication Date: 2018-06-29
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above problems in the prior art, that is, to solve the technical solution in the prior art to improve the oil return effect of the fixed-frequency compressor by limiting the length of the piping and the height difference between the inner and outer un...

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  • Return oil control method for air conditioner
  • Return oil control method for air conditioner
  • Return oil control method for air conditioner

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Embodiment Construction

[0030] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, although this embodiment is described by taking the cooling mode of the air conditioner as an example, this is not intended to limit the protection scope of the present invention. application occasions. For example, the air conditioner oil return control method of the present invention can also be applied to the heating mode of the air conditioner and other modes in which the compressor is in working state.

[0031] First refer to figure 1 , explain the principle of the present invention. in, figure 1 It is a schematic flow chart of the air conditioner oil return control method of the present invention. Such as figure 1 As sho...

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Abstract

The invention relates to the technical field of air conditioners, in particular to a return oil control method for an air conditioner, and is intended to solve the problem that an existing technical scheme to improve the return oil effect of a fixed frequency compressor is unable to basically solve the poor return oil issue. To this end, the return oil control method for the air conditioner comprises: calculating compression ratio E and/or suction vapor overheat delta T of a fixed frequency compressor; if the compression ratio E is less than minimum allowable compression ratio Emin and/or thesuction vapor overheat delta T is less than zero, controlling the air conditioner to enter a return oil mode. During operation of the fixed frequency compressor, when the compression ratio E is less than the minium allowable compression ratio Emin and/or the suction vapor overheat delta T is less zero, the air conditioner is controlled to enter the return oil mode; through the above control manner, the return oil control method for the air conditioner can provide improved return oil effect for the compressor, reduced failure rate for the compressor and extended life for the compressor.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner oil return control method. Background technique [0002] In the past two years, although inverter air conditioners have gradually emerged, for shopping malls, shops and other places that require high-power air conditioners, the unitary air conditioners using fixed frequency compressors (that is, fixed frequency air conditioners) have an incomparable price advantage, so still occupy the majority of the market share. According to the poor feedback of compressors in the market for many years, the proportion of fixed-frequency compressor failures caused by oil shortage ranks the top three in the proportion of fixed-frequency compressor failures. As a result, the oil return problem of the fixed-frequency compressor has become a problem that needs to be paid attention to and solved in the design of the fixed-frequency air-conditioning system. The existing ...

Claims

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Application Information

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IPC IPC(8): F25B31/00F25B49/02
CPCF25B31/004F25B49/02F25B2600/111Y02B30/70
Inventor 杨公增
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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