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Air conditioner anti-liquid return control method and air conditioner

A control method and technology for air conditioners, applied in heating and ventilation control systems, refrigerators, heating methods, etc., can solve problems such as compressor liquid hammer

Active Publication Date: 2020-08-18
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention aims to propose an air conditioner anti-liquid return control method to solve the problem of liquid hammer in the compressor caused by liquid return in the current air conditioner

Method used

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  • Air conditioner anti-liquid return control method and air conditioner
  • Air conditioner anti-liquid return control method and air conditioner
  • Air conditioner anti-liquid return control method and air conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] In order to avoid liquid return to the compressor due to temperature and load changes during the operation of the air conditioner, resulting in liquid shock of the compressor and damage to the compressor, this embodiment provides an anti-liquid return control method for the air conditioner. 2 is heated to prevent liquid return; this embodiment is realized by passing the high-pressure gaseous refrigerant discharged from the compressor 2 into the heating tank 1 arranged at the bottom of the compressor 2, and using the high-pressure gaseous refrigerant to heat the bottom of the compressor 2 Anti back liquid.

[0064] see figure 1 As shown, the air conditioner anti-liquid return control method provided in this embodiment includes:

[0065] S1: Obtain the operating mode of the air conditioner;

[0066] S2: Determine whether the operation mode of the air conditioner is cooling mode, if the operation mode of the air conditioner is cooling mode, then go to step S3, otherwise ...

Embodiment 2

[0078] The air conditioner in this embodiment includes a heating tank 1, and the heating tank 1 is arranged at the bottom of the compressor 2; a second exhaust pipeline 9 is connected between the air inlet of the heating tank 1 and the exhaust port of the compressor 2, A third exhaust pipeline 10 is connected between the exhaust port of the heating tank 1 and the condenser 4; the bottom of the compressor 2 is heated by passing the high-temperature and high-pressure refrigerant discharged from the compressor 2 into the heating tank 1 .

[0079] see figure 2 As shown, on the basis of Embodiment 1, controlling the heating of the compressor 2 according to the return air temperature T1 and the saturation temperature T2 of the low-pressure side refrigerant includes:

[0080] S31: Calculate the difference T1-T2 between the return air temperature T1 and the saturation temperature T2 of the low-pressure side refrigerant;

[0081] S32: Judging whether the difference T1-T2 is smaller t...

Embodiment 3

[0099] On the basis of embodiment 2, see Figure 4 As shown, in this embodiment, controlling the heating of the compressor 2 according to the outdoor ambient temperature T3, the return air temperature T1 and the saturation temperature T2 of the low-pressure side refrigerant includes:

[0100] S51: Judging whether the outdoor ambient temperature T3 is lower than the first preset temperature δ°C, if it is judged that the outdoor ambient temperature T3 is lower than the first preset temperature δ°C, go to step S52, otherwise go to step S53;

[0101] S52: Start heating the compressor 2, and control the opening of the electronic expansion valve 3 according to the outdoor ambient temperature T3;

[0102] S53: Judging whether the outdoor ambient temperature T3 is lower than the second preset temperature γ°C, if it is judged that the outdoor ambient temperature T3 is lower than the second preset temperature γ°C, go to step S54, otherwise go to step S51;

[0103] S54: Control the heat...

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Abstract

The invention provides a liquid return prevention control method for an air conditioner, and the air conditioner, and relates to the technical field of air conditioners. The liquid return prevention control method for the air conditioner comprises the steps that the operating mode of the air conditioner is obtained; if the operating mode of the air conditioner is a refrigeration mode, a compressoris controlled to be heated according to the air return temperature and the saturation temperature of a low-pressure side refrigerant; and if the operating mode of the air conditioner is a heating mode, the compressor is controlled to be heated according to the outdoor environment temperature, the air return temperature and the saturation temperature of the low-pressure side refrigerant. Accordingto the liquid return prevention control method for the air conditioner, the liquid return prevention control method adapting to the operating mode is selected under the different operating modes, thus whether the liquid refrigeration exists in a refrigeration system or not is judged accurately and visually, operating of a liquid return prevention mode is controlled accurately, the situation thatliquid return is generated in the compressor, and consequently liquid impact is caused is avoided, and the compressor is prevented from being damaged.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner liquid return prevention control method and an air conditioner. Background technique [0002] At present, the liquid return problem is mainly solved by adding a liquid storage tank with a fixed volume in the air conditioning system; when the temperature and load change cause the low-pressure side refrigerant to evaporate less, the liquid refrigerant may exceed the storage value of the liquid storage tank, causing the liquid refrigerant to enter Compressor, compressor liquid hammer. Contents of the invention [0003] In view of this, the present invention aims to propose a liquid return prevention control method for an air conditioner to solve the current problem of liquid hammer in the compressor caused by liquid return in the air conditioner. [0004] In order to achieve the above object, technical solution of the present invention is achieved in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02F24F11/67F24F11/64F24F11/84
CPCF24F11/64F24F11/67F24F11/84F25B49/022F25B2500/28
Inventor 章秋平黄春刘合心李兆东
Owner NINGBO AUX ELECTRIC
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