Air conditioner refrigerant leakage detection method and air conditioner

A technology of refrigerant leakage and detection method, which is applied in the control input, heating method, space heating and ventilation related to air characteristics, etc. The effect of avoiding detection deviation, improving accuracy and improving comfort

Active Publication Date: 2020-03-06
AUX AIR CONDITIONING LTD BY SHARE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the installation of the air conditioner is not standardized or the refrigerant in the system pipeline leaks slowly for a long time due to vibration and other reasons during later operation, the cooling effect of the air conditioner system will deteriorate
Refrigerant leakage not only causes the performance of the air conditioner to decline, but also causes the compressor to run in a poor condition. In severe cases, the compressor may even be damaged; as flammable refrigerants R32 and R290 are put into use, the leakage may cause an explosion and a crisis. User safety, so comprehensive and effective refrigerant leak detection is necessary
[0004] At present, the phenomenon of refrigerant leakage is generally discovered when the user feedbacks that the air conditioner is not cooling or the cooling effect is poor after the user installs the air conditioner. , and directly starting the compressor when there is a lot of leakage will cause permanent damage or even an explosion to the compressor
[0005] In the existing refrigerant leakage detection method, only the comparison between the indoor coil temperature and the set coil temperature is used to judge whether the refrigerant leaks, but when the refrigerant does not leak and the difference between the indoor ambient temperature and the indoor coil temperature , the indoor coil temperature will also change drastically, resulting in a huge difference between the indoor coil temperature and the set coil temperature and misjudgment of refrigerant leakage. Therefore, the logic judgment of the refrigerant detection method in the prior art is single, and misjudgment is easy to occur

Method used

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  • Air conditioner refrigerant leakage detection method and air conditioner
  • Air conditioner refrigerant leakage detection method and air conditioner
  • Air conditioner refrigerant leakage detection method and air conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Such as figure 1 As shown, the present invention discloses a detection method for air-conditioning refrigerant leakage, which includes a refrigerant circuit, a working fluid flowing through the refrigerant circuit, and a detectable additive added to the refrigerant circuit. A detection device is provided, and the detection device is used to detect the concentration of the external additive of the refrigerant circuit and feed it back to the controller. The controller runs the corresponding control program according to the detection result and the pre-stored relationship. The specific detection steps are as follows:

[0071] ST1: Detect the concentration of additives outside the refrigerant circuit to determine whether the compressor can start;

[0072] ST2: Compressor running t 1 After a period of time, does the compressor reach the reliable frequency value F of the compressor at the outdoor detection temperature? R , preliminarily judge whether the refrigerant leaks; ...

Embodiment 2

[0087] Example 2, such as figure 2 As shown, in ST1, the following detection steps are included:

[0088] ST11, start the air conditioner;

[0089] ST12, detecting the concentration of M additive components outside the refrigerant circuit, M≥2, and M is an integer;

[0090] ST13, judging whether the concentrations of the M additive components all satisfy the corresponding C i >C 预 , if not, enter ST14, if yes, enter ST15;

[0091] ST14, the compressor starts and enters ST2;

[0092] ST15, the refrigerant leaks, the air conditioner does not work, and a three-level leak fault prompt message is issued.

[0093] Other detection methods are the same as in Example 1. By detecting the concentration of at least two additive components, the interference from the indoor components is avoided. Only when at least two of them meet the corresponding preset information at the same time can the judgment of ST13 be completed to avoid misjudgment. The error message prompts brought about af...

Embodiment 3

[0094] Example 3, such as image 3 As shown, in ST2, the following detection steps are included:

[0095] ST21, start the compressor;

[0096] ST22, detect whether the running time of the compressor reaches t 1 , if yes, enter ST23, if not, return to ST22 to continue detection until the compressor running time reaches t 1 ;

[0097] ST23, obtain the current operating mode of the air conditioner, and enter ST3.

[0098] Other detection methods are the same as other embodiments. In this step, after running the compressor for a period of time, the operation mode of the air conditioner and other detection information are obtained, and the detection information is more accurate and stable, thus ensuring the reliability of the information source. Not the same, improve the accuracy of the detection method of the present invention. Acquisition of the operating mode of the air conditioner is a conventional means in the technical field, which will not be repeated here.

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PUM

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Abstract

The invention provides an air conditioner refrigerant leakage detection method and an air conditioner. A refrigerant loop is involved in the air conditioner refrigerant leakage detection method, a detectable additive is added in the refrigerant loop, a detection device is arranged outside the refrigerant loop, the detection device is used for detecting the concentration of the part, outside the refrigerant loop, of the additive in the refrigerant loop and feeding the concentration back to a controller, and the controller runs the corresponding control program according to a detection result and the pre-storage relationship. According to the air conditioner refrigerant leakage detection method, the situation that when a refrigerant is leaked, a compressor with leakage situation is directlystarted during starting of the air conditioner, and then further damage is caused to the air conditioner is avoided, then the detection deviation caused by other external factors is avoided, a multi-stage different-state same-element difference value comparison method is adopted, meanwhile, the detection factors are corrected, so that misjudgment is reduced, the accuracy of refrigerant leakage detection is improved, and the comfort of the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method for detecting leakage of air conditioner refrigerant and an air conditioner. Background technique [0002] With the continuous development of industrialization and the continuous acceleration of urbanization, people's requirements for quality of life are constantly improving, and the use of air conditioners has become more and more common. [0003] Existing air-conditioning and refrigeration systems include a compressor, an outdoor heat exchanger, a throttling device, an indoor heat exchanger, and pre-charged with a certain amount of refrigerant. In the case of no leakage of refrigerant, the air conditioning system can operate normally. If the installation of the air conditioner is not standardized or the refrigerant in the system pipeline leaks slowly for a long time due to vibration and other reasons during later operation, the cooling effect of the air condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/36F24F11/64F24F110/10
CPCF24F11/00F24F11/36F24F2110/10
Inventor 白韡许真鑫
Owner AUX AIR CONDITIONING LTD BY SHARE LTD
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