Defrosting method of air conditioner

An air conditioner and a technology before defrosting, which is applied to the defrosting field of air conditioners, can solve problems such as affecting heating capacity, and achieve the effect of improving low temperature heating performance

Inactive Publication Date: 2010-06-16
HISENSE HOME APPLIANCES GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both types of defrosting have not fully considered the factors that affect defrosting, and most of the set defrosting time is longer than the actual defrosting time, which greatly affects the heating capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] If the highest indoor pipe temperature is greater than 43°C before entering defrosting:

[0023] (1) After the air conditioner enters the defrosting state for 90 seconds, find and record the lowest value of the indoor pipe temperature. When the indoor pipe temperature rises from the lowest value to the highest value and starts to drop from the highest point, the defrosting will end after 20 seconds; enter Before defrosting, the maximum value of the indoor tube temperature is 1°C lower than 43°C, and the defrosting time will be extended by 10 seconds;

[0024] (2) After the air conditioner enters the defrosting state for 90 seconds, find and record the lowest value of the indoor pipe temperature. If the lowest value of the indoor pipe temperature does not drop for 30 seconds, stop defrosting; If the temperature is lower by 1°C, the defrosting time will be extended by 50 seconds.

[0025] The air conditioner can limit the longest defrosting time according to the differen...

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PUM

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Abstract

The invention discloses a defrosting method of an air conditioner. The method is characterized in that after the air conditioner enters a defrosting state for t1, the minimum value of the indoor case temperature is searched and recorded, the indoor case temperature increases from the minimum value to the maximum value, and if the maximum value is more than a temperature Tp before defrosting, the defrosting method comprises the following two steps: 1) if the temperature decreases from the minimum value, the defrosting process lasts for t2; on the condition, if the minimum value of the indoor case temperature before defrosting is delta Tp less than Tp, the defrosting time is extended for t3; and 2) if the minimum value of the indoor case temperature does not decrease for t4 after the defrosting state lasts for t1, the defrosting process is completed; and on the condition, if the minimum value of the indoor case temperature before defrosting is delta Tp less than Tp, the defrosting time is extended for t5. The invention can accurately judge when the defrosting process is needed to finish and accurately quit the defrosting process, thus increasing the low temperature heating performance of the air conditioner.

Description

technical field [0001] The invention relates to the technical field of air conditioners in electrical equipment, and more specifically relates to a defrosting method for an air conditioner. Background technique [0002] When the air conditioner is in heating operation, the frosting speed of the outdoor unit is related to many factors. The factors affecting the frosting of the outdoor unit are not only related to the outdoor ambient temperature and humidity, but also the heat dissipation area of ​​the outdoor unit heat exchanger, evaporation temperature, fin The shape of the fins, the hydrophilicity of the fins, and the wind speed of the fan directly affect the frosting speed. The speed of frosting not only affects the thickness of frost formation, but also affects the density of frost. The thickness and density of frost directly affect the length of time for defrosting. [0003] The length of defrosting time is not only affected by the thickness and density of frost, but a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00F25B47/00
Inventor 冯利峰
Owner HISENSE HOME APPLIANCES GRP CO LTD
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