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Defrost control method and system for frequent high temperature protection of air conditioner heating

A control method and high temperature protection technology, which can be used in damage protection, refrigerators, refrigeration components, etc., and can solve problems such as inability to defrost

Active Publication Date: 2019-01-11
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a defrosting control method for frequent high-temperature protection of air-conditioning and heating, which solves the problem that the outdoor heat exchanger cannot enter defrosting when the outdoor heat exchanger is frosted during frequent heating and high-temperature protection of the existing air-conditioning technical issues

Method used

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  • Defrost control method and system for frequent high temperature protection of air conditioner heating
  • Defrost control method and system for frequent high temperature protection of air conditioner heating
  • Defrost control method and system for frequent high temperature protection of air conditioner heating

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Embodiment Construction

[0022] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] When the air conditioner is running for heating, if the air inlet of the indoor unit or the heat exchanger is dirty and blocked, the internal pressure will be too high and the temperature of the indoor coil will be too high. At this time, the air conditioner will enter the high temperature protection stage, that is, control the compression Reduce the frequency of the machine until the temperature of the indoor coil is lower than the anti-high temperature reduction temperature. At this time, if the indoor unit of the air conditioner is located in an excessively large space or a space with poor thermal insulation performance, the ambient temperature will always fail to reach the set temperature, which will cause the target frequency of the compressor to continue to increase, causing the indoor coil to malfunction. When the temperature ris...

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Abstract

The invention relates to a defrosting control method and system used during heating frequent high-temperature prevention protection of an air conditioner. When the air conditioner operates in a heating mode, whether the air conditioner is in a frequent high-temperature prevention protection state or not is detected; if yes, the outdoor environment temperature T<outer circle> and outdoor coil pipe temperature T<e> are detected; and whether the air conditioner is in a defrosting state or not is judged through the relationship between the cumulative time t when the outdoor environment temperature T<outer circle> is smaller than or equal to T<setting> and set time t<setting>. The influence of temperature fluctuation of an indoor coil pipe on the outdoor coil pipe temperature when the air conditioner is in the frequent high-temperature prevention protection state can be avoided, and the purpose of accurate defrosting is realized.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning defrosting control, and in particular relates to a defrosting control method and system for frequent heating and high-temperature protection of an air-conditioning system. Background technique [0002] The air conditioner operates in a low-temperature environment for heating. When the surface temperature of the outdoor heat exchanger is below zero and lower than the dew point temperature of the ambient air, frost will occur, which will affect the heating effect of the air conditioner. It needs to be defrosted. At present, inverter air conditioners generally adopt a defrosting control method that combines time and temperature: for example, at a certain outdoor ambient temperature, after the air conditioner has been running for more than the set time, if it is detected that the temperature of the outdoor coil is lower than Set the temperature, judge that the air conditioner is frosted, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/42F25B47/02
Inventor 姚兴
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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