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Control method and device for improving reliability of air conditioner and air conditioner

A control method and technology of an air conditioner, applied in the field of control devices and air conditioners, and a control method for improving the reliability of air conditioners, can solve the problems of low control precision and accuracy of water leakage detection of indoor units, and achieve enhanced heat transfer of indoor units, Improve the use experience and improve the effect of inner coil temperature

Active Publication Date: 2021-06-25
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention can solve the technical problems of indoor unit water leakage, low detection accuracy, and low control accuracy caused by frosting and icing during low-temperature refrigeration or dehumidification of the air conditioner

Method used

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  • Control method and device for improving reliability of air conditioner and air conditioner
  • Control method and device for improving reliability of air conditioner and air conditioner
  • Control method and device for improving reliability of air conditioner and air conditioner

Examples

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Effect test

no. 1 example

[0045] see figure 1 , an embodiment of the present invention provides a control method for improving the reliability of an air conditioner, and specifically includes the following steps:

[0046] S1: When the air conditioner is in cooling or dehumidification mode, detect the indoor ambient temperature T 内 and outdoor ambient temperature T 外 ;

[0047] S2: Judging the outdoor ambient temperature T 外 Is it lower than the low temperature set temperature T 限 , and the indoor ambient temperature T 内 with set temperature T 设 Whether the difference is less than the preset difference T 差 ;

[0048] Among them, the low temperature set temperature T 限 Preferably 20-23°C, detect the outdoor ambient temperature T 外 The purpose is to eliminate the faults of the system itself, for example, abnormal conditions such as the welding blockage of the indoor unit may also cause the outdoor ambient temperature T 外 abnormal;

[0049] Preset difference T 差 It is preferably 2-5°C, for exam...

no. 2 example

[0053] see figure 1 and figure 2 , further, the low temperature protection control mode includes:

[0054] S4: Detection system low pressure value P S , and judge the system low pressure value P S Is it less than the system pressure limit value P 限 , if P S 限 , then enter the stage of detecting the speed of the internal fan.

[0055] Among them, P 限 The thresholds set according to different refrigerants are different, preferably the saturation pressure value corresponding to 0°C is P 限 value.

[0056] The pressure at the return pipe of the low-pressure compressor, ignoring the pressure loss, is equivalent to the outlet pressure of the evaporator. When the system low-pressure pressure value P S When it is too low, that is, the corresponding saturation temperature is too low, that is, the outlet pipe temperature of the evaporator is considered to be too low, and the outlet pipe temperature of the evaporator is the temperature of the refrigerant after heat absorption, wh...

no. 3 example

[0094] This embodiment provides a control device for improving the reliability of an air conditioner, including:

[0095] Detection unit 210, the detection unit is used to detect indoor ambient temperature T 内 , Outdoor ambient temperature T 外 And the internal fan speed N, the external fan speed M;

[0096] Judging unit 220, said judging unit is used for according to indoor environment temperature T 内 , Outdoor ambient temperature T 外 And compare and judge the internal fan speed N, the external fan speed M and the corresponding threshold;

[0097] The control unit 230 is configured to control the compressor, and / or the internal fan, and / or the external fan according to the judgment result.

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Abstract

The invention provides a control method and device for improving the reliability of an air conditioner and the air conditioner. The control method comprises the steps that when the air conditioner is in a refrigeration or dehumidification mode, an indoor environment temperature T and an outdoor environment temperature T<outside> are detected; whether the outdoor environment temperature T<outside> is smaller than a low-temperature set temperature T<limit> or not is judged, and whether the difference value between the indoor environment temperature T and a set temperature T is smaller than a preset difference value T<difference> or not is judged; and if the outdoor environment temperature T<outside> is smaller than the low-temperature set temperature T<limit> and the difference value between the indoor environment temperature T and the set temperature T is smaller than the preset difference value T<difference>, the air conditioner is controlled to enter a low-temperature protection control mode. The control method and device can solve the technical problems of indoor unit water leakage, low detection accuracy and low control precision caused by frosting, freezing and the like during low-temperature refrigeration or dehumidification of the air conditioner.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular, to a control method for improving the reliability of an air conditioner, a control device and an air conditioner. Background technique [0002] At this stage, the demand for air conditioners is increasing day by day, and the use scenarios of air conditioners are complex and diverse. In actual use, there may be low-temperature refrigeration or dehumidification (such as equipment rooms, etc.). At this time, the outdoor temperature is low and the external heat exchange capacity is strong. The load on the upper inner side may be small. At this time, the temperature of the evaporator is often extremely low, and the internal unit is prone to frost and ice. In severe cases, the frost layer is too thick and it will cause water leakage from the internal unit, which affects the user experience. [0003] Moreover, in the prior art, it is judged whether to enter the low-temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/30F24F11/64F24F11/65F24F11/77F24F11/86F24F11/871F24F11/88F24F110/10F24F110/12
CPCF24F11/30F24F11/64F24F11/65F24F11/77F24F11/86F24F11/871F24F11/88F24F2110/10F24F2110/12Y02B30/70
Inventor 杨东林黄春任小辉
Owner NINGBO AUX ELECTRIC
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