An air conditioner fluorine deficiency protection method, device and air conditioner

An air conditioner and fluorine-deficiency technology, which is applied in the direction of mechanical equipment, can solve the problems of air-conditioning system performance degradation, aggravated compressor wear, and damage to the compressor, so as to avoid system performance degradation and avoid damage to the compressor.

Active Publication Date: 2019-01-15
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the leakage is not detected in time and corresponding protective measures are not taken, the performance of the air conditioning system will be reduced, and the wear and tear of the compressor will be aggravated, and even the compressor will be damaged in severe cases.

Method used

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  • An air conditioner fluorine deficiency protection method, device and air conditioner
  • An air conditioner fluorine deficiency protection method, device and air conditioner
  • An air conditioner fluorine deficiency protection method, device and air conditioner

Examples

Experimental program
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Embodiment 1

[0057] This embodiment 1 discloses a fluorine-deficiency protection method for an air conditioner. The method is suitable for fluorine-deficiency protection for fixed-frequency units. Refer to figure 1 , the method may include the following steps:

[0058] S101: Obtain the pre-calculated initial refrigerant mass flow rate Q when the preset detection condition is met 0 , and at the same time obtain the current real-time refrigerant mass flow rate q m .

[0059] The method of the present invention aims to detect whether the system refrigerant leaks by detecting the actual refrigerant mass flow in the air conditioner system and comparing it with the initial mass flow value after installation, and to carry out corresponding measures when the leakage is serious. protection control. Based on this, the present invention first needs to obtain the initial mass flow value Q after installation through the following pretreatment process 0 :

[0060] 1) Turn on the air conditioner for...

Embodiment 2

[0084] In the second embodiment, refer to figure 2 , the method may also include the following steps:

[0085] S105: If Δq m ≥0, the shutdown control command is not issued, the air conditioner continues to run, and the air conditioner continues to run for the second preset time length ΔT 2 , the air conditioner fluorine deficiency protection method is triggered.

[0086] S106: If Δq m 2 , trigger the air-conditioning fluorine deficiency protection method, where, Δq m =q m -Q 0 , η=|Δq m | / Q 0 *100%.

[0087] That is, specifically, if Δq m ≥0, it means that there is no refrigerant leakage, and there is no need for shutdown protection, so that the air conditioner can continue to run at this time, and continue to run ΔT 2 When the time is long, the processing process included in the fluorine deficiency protection method is triggered again, so as to realize the cyclic detection of the leakage of the refrigerant.

[0088] If Δq m 2 When the time is long, the fluorine d...

Embodiment 3

[0090] Embodiment 3 discloses a fluorine deficiency protection device for an air conditioner, and the device corresponds to the fluorine deficiency protection method for an air conditioner disclosed in Embodiment 1 and Embodiment 2.

[0091] First, corresponding to Embodiment 1, refer to image 3 , the device includes an acquisition module 100 , a calculation module 200 , a judgment module 300 and a control module 400 .

[0092] An acquisition module 100, configured to acquire a pre-calculated initial refrigerant mass flow rate Q when a preset detection condition is met 0 , and at the same time obtain the current real-time refrigerant mass flow rate q m .

[0093] Wherein, the acquisition module 100 includes a first acquisition unit, a first processing unit and a first calculation unit.

[0094] The first acquisition unit is used to acquire the compressor volume flow q V , compensation temperature Δt and the current real-time compressor suction temperature t 吸 , the tempe...

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Abstract

The invention discloses an air conditioner fluorine deficiency protection method and an air conditioner fluorine deficiency protection device as well as an air conditioner. The air conditioner fluorine deficiency protection method comprises the following steps: detecting a practical refrigerant mass flow rate qm in an air conditioner system, and comparing the practical refrigerant mass flow rate qm with an initial mass flow rate value Q0 after installation to judge whether refrigerant is leaked or not; calculating the mass flow rate variation ratio eta of the refrigerant based on the qm and the Q0, detecting the leakage degree of the refrigerant according to the numerical magnitude of the mass flow rate variation ratio eta, and performing shutdown protection control when the refrigerant leaks much to reach preset protection limit, that is, when the mass flow rate variation ratio eta is greater than a preset threshold value. The air conditioner fluorine deficiency protection method can be used for effectively detecting a refrigerant leakage condition and timely performing shutdown protection when the refrigerant leaks much, so that the phenomena such as system performance reduction and damage to a compressor are avoided.

Description

technical field [0001] The invention belongs to the technical field of air conditioner detection and control, and in particular relates to an air conditioner fluorine deficiency protection method and device and an air conditioner. Background technique [0002] Air conditioners often have slow leakage of refrigerant in their systems due to various reasons. For example, when the air conditioner is installed, the connection between the connecting pipe and the connecting pipe of the internal and external units is poorly sealed, or the connecting pipe is bent and leaks when it passes through the wall. Both will lead to slow leakage of refrigerant; in addition, if the system pipeline is in a harsh environment, the pipeline is prone to leakage after long-term corrosion, so that the amount of refrigerant in the system gradually decreases. [0003] Slow refrigerant leaks are more subtle and difficult to detect. However, if the leakage phenomenon is not detected in time and correspon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/36F24F11/64
CPCF24F11/36F24F11/70
Inventor 颜圣绿王磊刘志孝张浩刘伯春曹勇何国军汪俊勇
Owner GREE ELECTRIC APPLIANCES INC
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