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Refrigerant leak detection method, refrigerant leak detection system and air conditioner

A leak detection and detection method technology, applied in heating and ventilation safety systems, heating and ventilation control systems, heating methods, etc., can solve problems such as inability to accurately detect refrigerant leakage, reduction of refrigerants, and failure to consider them.

Active Publication Date: 2014-06-25
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when installing an air conditioner, if the emptying time is too long, the refrigerant will be reduced; if the indoor and outdoor high and low pressure connection pipe nuts are not sealed well, the refrigerant will leak slowly for a long time; cause refrigerant leakage, etc.
[0004] However, most of the air conditioners proposed in the related art do not have the function of automatically detecting whether the refrigerant leaks. When the superheat degree of the heat exchanger deviates from the preset value, it is determined that the air conditioner is leaking refrigerant. Since this method does not consider the influence of the indoor and outdoor ambient temperature on the superheat degree of the indoor heat exchanger, the detection result is not accurate, and it cannot be accurate. Detect the leakage of refrigerant

Method used

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  • Refrigerant leak detection method, refrigerant leak detection system and air conditioner
  • Refrigerant leak detection method, refrigerant leak detection system and air conditioner
  • Refrigerant leak detection method, refrigerant leak detection system and air conditioner

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Experimental program
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Effect test

Embodiment approach 1

[0066] According to an embodiment of the present invention, before the step of obtaining the theoretical operating power of the air conditioner under the current working condition, it further includes: storing the theoretical operating power of the air conditioner under each of the various working conditions Theoretical operating power; the step of obtaining the theoretical operating power of the air conditioner under the current working conditions, specifically: finding the theoretical operating power under each of the stored various working conditions. The theoretical operating power of the air conditioner under the current working conditions.

[0067] As a preferred embodiment, the theoretical operating power of the air conditioner under each of the various operating conditions can be stored in advance, so that when judging whether the air conditioner has refrigerant leakage under the current operating condition according to the power, it can be directly obtained. To the th...

Embodiment approach 2

[0069]According to an embodiment of the present invention, the step of obtaining the theoretical operating power of the air conditioner under the current working condition specifically includes: calculating the theoretical operating power of the air conditioner under the current working condition in real time through the calculation formula of the theoretical operating power Under the theoretical operating power.

[0070] As another preferred embodiment, the formula for calculating the theoretical operating power of the air conditioner can be preset, so that when judging whether the air conditioner has refrigerant leakage under the current working condition according to the power, the power of the air conditioner under the current working condition can be calculated in real time. Theoretical operating power.

[0071] Specifically, when other working conditions are constant, the operating power of the air conditioner changes by A for every 1°C change in the outdoor ambient temp...

Embodiment 1

[0105] Under rated cooling conditions, the following data are obtained through testing:

[0106] When the refrigerant leaks 10%, that is, f1=10%, the theoretical operating power P1=1026W;

[0107] When the refrigerant leaks 20%, that is, f2=20%, the theoretical operating power P2=950W;

[0108] When the refrigerant leaks 30%, that is, when f3=30%, the theoretical operating power P3=836;

[0109] When the refrigerant leaks 40%, that is, f4=40%, the theoretical operating power P4=726;

[0110] When the refrigerant leaks 50%, that is, f5=50%, the theoretical operating power P5=663.

[0111] If the air conditioner is running under the rated cooling condition, the actual operating power of the air conditioner is P=990W by detecting the operating current and operating voltage of the air conditioner. Under cooling conditions:

[0112] ΔP=1089+11×(35-35)+14×(27-27)=1089W, that is, the theoretical operating power of the air conditioner is 1089W under standard working conditions. Si...

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Abstract

The invention provides a refrigerant leak detection method, a refrigerant leak detection system and an air conditioner. The refrigerant leak detection method includes the steps of detecting actual operating power of the air conditioner under the current operating condition; obtaining theoretical operating power of the air conditioner under the current operating condition; judging that refrigerants of the air conditioner leak when the actual operating power is lower than the theoretical operating power. According to the technical scheme, whether the refrigerants in the air conditioner leak or not can be accurately detected.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a refrigerant leakage detection method, a refrigerant leakage detection system and an air conditioner. Background technique [0002] An air conditioner usually includes an indoor unit and an outdoor unit. The air conditioning system includes a compressor, a heat exchanger, a throttling element, and a controller, etc., wherein the heat exchanger includes an indoor heat exchanger and an outdoor heat exchanger. The air conditioner system also has a refrigerant, which is driven by the pressure generated by the compressor, circulates in the entire system, and exchanges heat with the indoor and outdoor environments to achieve the purpose of cooling or heating. [0003] During the use of the air conditioner, the cooling or heating of the air conditioner is often affected by the leakage of the refrigerant. For example, when installing an air conditioner, if the emptying time is...

Claims

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Application Information

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IPC IPC(8): G01M3/40F24F11/02
Inventor 李大振
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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