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Power-off anti-freezing air conditioning unit and control method thereof

A technology for air conditioning units and control valves, which is applied to heating and ventilation control systems, refrigerators, compressors, etc., and can solve problems such as evaporators and pipelines that are prone to freezing and cracking

Pending Publication Date: 2021-01-08
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a power-off anti-freezing air-conditioning unit and its control method to at least solve the problem in the prior art that the evaporator and pipes of the refrigeration unit are prone to freezing and cracking when a power-off accident occurs

Method used

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  • Power-off anti-freezing air conditioning unit and control method thereof
  • Power-off anti-freezing air conditioning unit and control method thereof
  • Power-off anti-freezing air conditioning unit and control method thereof

Examples

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Embodiment 1

[0024] In preferred embodiment 1 of the present invention, an air conditioning unit is provided, specifically, figure 1 An optional schematic diagram showing the structure of the unit, such as figure 1 As shown, the air conditioning unit includes:

[0025] The liquid storage tank 1 includes a first inlet; wherein, the first inlet is connected to the water outlet at the bottom of the evaporator and is lower than the water outlet;

[0026] The control valve is located on the pipeline between the liquid storage tank 1 and the water outlet, and is used to open when the power is off, so that the chilled water in the evaporator flows into the liquid storage tank 1 .

[0027] In the above-mentioned embodiment, a winter power-off anti-freezing scheme is proposed. After the unit is powered off, the control valve is opened, and the water in the evaporator and pipeline is drained into the liquid storage tank due to gravity, and the cooling operation in winter After a sudden power failu...

Embodiment 2

[0035] In preferred embodiment 2 of the present invention, a method for controlling an air-conditioning unit is provided, which is applied to the air-conditioning unit in the above-mentioned embodiment 1. Specifically, image 3 An alternative flowchart showing the method, such as image 3 As shown, the method includes the following steps S302-S306:

[0036] S302: Obtain the outdoor ambient temperature;

[0037] S304: Determine whether the outdoor ambient temperature is less than a preset temperature threshold;

[0038] S306: If yes, control the control valve to open when the power is off, so that the chilled water in the evaporator flows into the liquid storage tank.

[0039] In the above-mentioned embodiment, a winter power-off anti-freezing scheme is proposed. After the unit is powered off, the control valve is opened, and the water in the evaporator and pipeline is drained into the liquid storage tank due to gravity, and the cooling operation in winter After a sudden po...

Embodiment 3

[0046] Based on the air-conditioning unit control method provided in the above-mentioned embodiment 2, in the preferred embodiment 3 of the present invention, a storage medium containing computer-executable instructions is also provided, and when the computer-executable instructions are executed by a computer processor, the To implement the control method of the air conditioning unit as described above.

[0047] In the above-mentioned embodiment, a winter power-off anti-freezing scheme is proposed. After the unit is powered off, the control valve is opened, and the water in the evaporator and pipeline is drained into the liquid storage tank due to gravity, and the cooling operation in winter After a sudden power failure during the process, it can ensure that the water system does not freeze and the unit is safe and reliable.

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PUM

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Abstract

The invention discloses a power-off anti-freezing air conditioning unit and a control method thereof. The air conditioning unit comprises a liquid storage tank and a control valve, the liquid storagetank comprises a first inlet, wherein the first inlet is connected with a water outlet at the bottom of an evaporator and is lower than the water outlet, and the control valve is located on a pipelinebetween the liquid storage tank and the water outlet and used for being opened when power is off so that chilled water in the evaporator flows into the liquid storage tank. According to the power-offanti-freezing air conditioning unit and the control method thereof, the problem that in the prior art, when a power failure accident occurs, the evaporator and the pipeline of the refrigerating unitare easily frozen and cracked is solved, and the safety and reliability of the unit can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a power-off anti-freezing air conditioning unit and a control method thereof. Background technique [0002] The characteristic of the air-cooled chiller for year-round refrigeration is that the unit still needs continuous cooling when the outdoor temperature is lower than 0°C for a long time in winter. In the evaporator, the temperature of the chilled water is lowered to supply the user with cooling. In winter, when the outdoor temperature is lower than 0°C, in order to prevent the evaporator and pipes from being frozen and cracked, the general method is to adjust the load of the compressor or turn on the electric heating of the evaporator according to the detected ambient temperature and chilled water temperature and other parameters. , to avoid freezing accidents in evaporators and water pipes. However, after a power outage accident occurs in winter, the unit cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/00F25B43/00F25B41/20F25B49/02F25B41/00F24F11/41F24F11/64F24F110/12
CPCF25B1/00F25B43/006F25B49/02F25B41/00F24F11/41F24F11/64F24F2110/12
Inventor 李娜游浩亮程琦陈培生刘思源
Owner GREE ELECTRIC APPLIANCES INC