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Refrigerant flow control method and system of air conditioner

A technology of refrigerant flow and control method, which can be used in heating and ventilation control systems, heating and ventilation safety systems, mechanical equipment, etc., and can solve problems such as compressor liquid return

Active Publication Date: 2021-09-28
QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned defects, the present invention is proposed to provide a refrigerant flow control method and system for an air conditioner that solves or at least partially solves the problems of how to accurately detect whether there is liquid refrigerant at the bottom of the compressor and how to prevent the compressor from returning to liquid

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  • Refrigerant flow control method and system of air conditioner
  • Refrigerant flow control method and system of air conditioner
  • Refrigerant flow control method and system of air conditioner

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Embodiment Construction

[0062] Some 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.

[0063] In the description of the present invention, a "module" may include hardware, software or a combination of both. A module may include hardware circuits, various suitable sensors, communication ports, memory, and may also include software parts, such as program codes, or a combination of software and hardware. The term "A and / or B" means all possible combinations of A and B, such as only A, only B or A and B. The term "at least one of A or B" or "at least one of A and B" has a similar meaning to "A and / or B" and may include only A, only B or both A and B. The terms "a" and "the" in the singular may also include plural forms.

[0064] Some ...

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Abstract

The invention relates to the technical field of air conditioner control, particularly provides a refrigerant flow control method and system of an air conditioner. The problems of how to accurately detect whether a liquid refrigerant exists or not at the bottom of a compressor and how to prevent liquid return of the compressor are solved. The refrigerant flow control method comprises the steps that the heating state of the air conditioner is analyzed according to the environment temperature of an outdoor unit and the bottom temperature of the compressor during heating of the air conditioner (if the environment temperature of the outdoor unit is smaller than or equal to a first temperature threshold value and whether the bottom temperature of the compressor is smaller than or equal to a second temperature threshold value, if yes, the air conditioner is in a low-temperature heating state and the liquid refrigerant is generated at the bottom of the compressor, otherwise, the air conditioner is in a conventional heating state), different flow adjusting strategies are selected according to the heating state to adjust the flow of the refrigerant flowing into an evaporator, so that it is guaranteed that a large amount of liquid refrigerant cannot be generated at the bottom of the compressor in the heating process of the air conditioner and is sucked into the compressor, and compressor internal parts are damaged.

Description

technical field [0001] The invention relates to the technical field of air conditioning control, in particular to a refrigerant flow control method and system for an air conditioner. Background technique [0002] Compressor liquid return refers to the phenomenon that there is liquid refrigerant at the suction port of the compressor due to excessive refrigerant flow rate, evaporator failure, and excessive opening of the throttle device of the refrigerant pipeline. When using refrigerant, these liquid refrigerants are easily sucked into the compressor and damage the internal components of the compressor. [0003] At present, the existing compressor liquid return detection method mainly judges whether compressor liquid return occurs according to the suction superheat of the compressor. If the suction superheat is lower than a certain value (such as 0), it is determined that the compressor suction There is liquid refrigerant in the port. However, this method cannot detect whet...

Claims

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Application Information

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IPC IPC(8): F24F11/30F24F11/64F24F11/70F24F11/61F24F110/12
CPCF24F11/30F24F11/64F24F11/70F24F11/61F24F2110/12F24F11/89Y02B30/70
Inventor 刘守宇熊长友郭成才
Owner QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD
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