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A method and device for controlling oil return in a multi-line system

A multi-line system, oil return control technology, applied in refrigerators, compressors, refrigeration components, etc., can solve the problems of short air conditioning effect and long oil return time.

Active Publication Date: 2019-10-22
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, in order to solve the problem in the prior art that the fixed oil return time may be too long or too short to cause the air conditioning effect, the purpose of the present invention is to propose a multi-line system oil return control method

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  • A method and device for controlling oil return in a multi-line system
  • A method and device for controlling oil return in a multi-line system
  • A method and device for controlling oil return in a multi-line system

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Embodiment Construction

[0019] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. These embodiments of the present invention may be referred to herein, individually or collectively, by the term "invention", which is for convenience only and is not intended to automatically limit the application if in fact more than one invention is disclosed The scope is any individual invention or inventive concept.

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Abstract

The invention provides an oil return control method for a multi-split air-conditioning system. The oil return control method for the multi-split air-conditioning system comprises the steps that the cumulative operating time is determined according to multiple factors affecting oil return of a compressor; and whether oil return is needed or not is judged according to the cumulative operating time. In addition, the invention provides an oil return control device for the multi-split air-conditioning system. The method or device provided by the invention has the effects that firstly, all the factors affecting oil return of the compressor are analyzed, and the cumulative operating time is calculated according to the weights of the factors, so that dynamic calculation of the oil return time is achieved; and secondly, it is guaranteed that sufficient compressor oil is provided for the compressor, and the influence on the air-conditioning effect is minimized.

Description

technical field [0001] The invention belongs to the field of multi-connected air conditioners, and in particular relates to a method and device for controlling oil return in a multi-connected system. Background technique [0002] In a multi-connected system, the outdoor unit can be connected to multiple indoor units. Some indoor units are running normally, and some are in shutdown state. After the system has been running for a period of time, the pipeline connected to the stopped internal unit or its heat exchanger will store compressor oil. The lack of compressor oil will cause mechanical damage to the compressor and seriously reduce product quality. The existing method is usually to return the oil regularly to realize the recovery of the compressor oil. The oil return process of the system is usually to adjust the frequency of the compressor, the opening of the expansion valve, the speed of the fan, etc. Although the regular oil return method is simple to control, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B31/00F25B49/02
Inventor 禚百田时斌程绍江王军邵文俊
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD