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A kind of air conditioner fluorine deficiency protection method, device and air conditioner

An air conditioner, fluorine-deficient technology, applied in heating methods, space heating and ventilation, lighting and heating equipment, etc., can solve problems such as aggravated compressor wear, performance degradation of air conditioning systems, damage to compressors, etc., to avoid damage to compressors. machine, avoid the effect of system performance degradation

Active Publication Date: 2017-09-22
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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  • A kind of air conditioner fluorine deficiency protection method, device and air conditioner
  • A kind of air conditioner fluorine deficiency protection method, device and air conditioner
  • A kind of air conditioner fluorine deficiency protection method, device and air conditioner

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Embodiment 1

[0054] This embodiment 1 discloses a fluorine-deficiency protection method for an air conditioner. The method is applicable to fluorine-deficiency protection for fixed-frequency units and variable-frequency units at the same time. Refer to figure 1 , the method may include the following steps:

[0055] S101: Obtain the current real-time refrigerant mass flow q when the preset detection conditions are met m , and at the same time obtain the normal mass flow rate Q corresponding to the current operating condition according to the pre-established correspondence between the normal mass flow rate and the operating condition.

[0056] Wherein, the detection condition is specifically the preset running time ΔT after the air conditioner is turned on, or, on the premise that the air conditioner continues to run, the time ΔT elapsed after the execution of the last round of fluorine deficiency protection method for the air conditioner. That is to say, this embodiment specifically adopts...

Embodiment 2

[0082] In the second embodiment, refer to figure 2 , the method may also include the following steps:

[0083] S105: If Δq m ≥0, no shutdown control command is issued, the air conditioner continues to run, and when the air conditioner continues to run for a preset duration ΔT, the air conditioner fluorine deficiency protection method is triggered.

[0084] S106: If Δq m m =q m -Q, η=|Δq m | / Q 0 *100%.

[0085] That is, specifically, if Δq m ≥0, it means that there is no refrigerant leakage, and there is no need to shut down the protection, so that the air conditioner can continue to run at this time, and when it continues to run for a long time ΔT, the processing process of the fluorine deficiency protection method will be triggered again to realize the protection against refrigerant leakage. The condition is checked cyclically.

[0086] If Δq m 2 When the time is long, the fluorine deficiency protection method is triggered again for cyclic detection.

Embodiment 3

[0088] 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.

[0089] 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 .

[0090] An acquisition module 100, configured to acquire the current real-time refrigerant mass flow q when the preset detection condition is met m , and at the same time obtain the normal mass flow rate Q corresponding to the current operating condition according to the pre-established correspondence between the normal mass flow rate and the operating condition.

[0091] Wherein, the acquisition module 100 includes a first acquisition unit and a second acquisition unit.

[0092] The first acquisition unit includes an acquisition subunit, a processing subuni...

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Abstract

The invention discloses 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: when preset conditions are satisfied, detecting the current real-time refrigerant mass flow rate qm of an air conditioner system, obtaining normal mass flow rate Q corresponding to the current operation condition by inquiring a pre-established mapping relation table of normal mass flow and operation conditions; then, comparing the qm with the normal mass flow rate Q to detect whether refrigerant leaks or not; calculating the mass flow rate variation ratio eta of the refrigerant based on the qm and the Q, detecting the leakage degree of the refrigerant according to the numerical magnitude of the eta, and timely giving a shutdown protection order to perform shutdown protection on the air conditioner when the eta is greater than a preset threshold value and the refrigerant leaks much to reach preset protection limit. 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): F24F11/00
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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