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Method for Preventing Evaporator from Frosting and Air Conditioner

A technology for evaporators and air conditioners, which is applied to evaporators/condensers, damage protection, refrigeration safety arrangements, etc., and can solve the problem of inaccurate determination of evaporator frosting, evaporator frosting, and low system pressure, etc. problems, to achieve the effect of avoiding untimely defrosting, preventing frost formation, and reducing energy consumption

Active Publication Date: 2019-11-15
AUX AIR CONDITIONING LTD BY SHARE LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, air conditioner refrigeration prevents the evaporator from frosting mainly by sensing the temperature in the middle of the evaporator and judging the frosting situation of the evaporator, and then defrosting by stopping the compressor and turning on the inner fan. Generally, there is no problem in use, but in special cases, the outdoor temperature is too low and there is a cooling demand at the same time, resulting in too low system pressure and too low evaporation pressure, resulting in partial frost on the evaporator, and the temperature in the middle of the evaporator is the temperature of the superheated refrigerant, which cannot Accurately determine the evaporator frost situation

Method used

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  • Method for Preventing Evaporator from Frosting and Air Conditioner

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Embodiment Construction

[0035] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0037] The invention provides a method for preventing evaporator from frosting. figure 1 It is a flowchart of a method for preventing frost on an evaporator under low-temperature refrigeration according to an embodiment of the present invention. like figure 1 As shown, the method includes the following steps:

[0038] S1, in the low-temperature cooling mode, obtain the temperature of the outer disk of the condenser;

[0039] S2, if the temperature of the outer disk of the condenser is lower than the temperature threshold of the outer disk of the condenser, obtain the continuous running time of the compressor for cooling;

[0040] S3, if the compressor cooling continuous running time ...

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Abstract

The invention provides a method for preventing frost from being formed on an evaporator and an air conditioner. The method for preventing frost from being formed on the evaporator comprises the stepsthat condenser outer plate temperature is obtained in a low-temperature refrigeration mode; if the condenser outer plate temperature is lower than a condenser outer plate temperature threshold value,the continuous working time of condenser refrigeration is obtained; if the continuous working time of condenser refrigeration is greater than a condenser refrigeration working time threshold value, adefrosting mode is enabled, wherein the continuous working time is the continuous refrigeration working time of the condenser after the condenser outer plate temperature is lower than the condenser outer plate temperature threshold value. According to the method for preventing frost from being formed on the evaporator and the air conditioner, the frosting situation of the evaporator can be accurately judged during low-temperature refrigeration by detecting the condenser outer plate temperature and the operating situation of a compressor, thus frost is effectively prevented from being formed onthe evaporator, and the abnormal situation is avoided.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method for preventing evaporator from frosting under the condition of low-temperature refrigeration and an air conditioner. Background technique [0002] At present, air conditioner refrigeration prevents the evaporator from frosting mainly by sensing the temperature in the middle of the evaporator and judging the frosting situation of the evaporator, and then defrosting by stopping the compressor and turning on the inner fan. Generally, there is no problem in use, but in special cases, the outdoor temperature is too low and there is a cooling demand at the same time, resulting in too low system pressure and too low evaporation pressure, resulting in partial frost on the evaporator, and the temperature in the middle of the evaporator is the temperature of the superheated refrigerant, which cannot Accurately determine the frosting condition of the evaporator. Contents...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B39/02F25B47/00F25B49/02
Inventor 任桂平
Owner AUX AIR CONDITIONING LTD BY SHARE LTD
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