Heat pump defrost control method

A control method and heat pump technology, applied in the field of heat pumps, can solve the problems of incomplete defrosting of heat pump units, untimely exit of the defrosting program, etc., so as to improve the defrosting effect, improve the accuracy and timeliness, and solve the difficulty in removing icing. Effect

Inactive Publication Date: 2018-03-27
GUANGDONG PHNIX ENERGY TECH CO LTD
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Problems solved by technology

[0004] The embodiment of the present invention provides a heat pump defrosting control method to solve the problem that the heat pump unit exits the defrosting program only when it detects that the coil temperature is higher than the set value, resulting in incomplete defrosting of the heat p

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[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0067] see figure 1 , a preferred embodiment of the present invention provides a heat pump defrosting control method, including the following steps:

[0068] S1. When the heating mode is running, judge whether the heat pump meets the conditions for entering the defrosting mode according to the return air pressure value of the heat pump;

[0069] S2. When the heat pump satisfies the conditions for entering the defrosting mode, control the heat pump to enter the def...

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Abstract

The invention provides a heat pump defrost control method, which comprises the steps of when running at a heating mode, judging whether a condition for entering a defrost mode is met or not accordingto a pressure value of a heat pump; when meeting the condition for entering the defrost mode, entering the defrost mode; when running at the defrost mode, judging whether a condition for exiting the defrost mode is met at the same time according to the pressure value of the heat pump and a coil temperature value of the heat pump; and when meeting the condition for exiting the defrost mode at the same time, exiting the defrost mode. The heat pump defrost control method provided by the invention can be used for effectively judging whether a heat pump unit meets the condition for exiting the defrost mode or not, so that the accuracy and the timeliness in defrosting are improved, and a defrosting effect of the heat pump unit is further improved.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a heat pump defrosting control method. Background technique [0002] When the heat pump system is heating, when the ambient temperature is lower than the freezing point, the water vapor in the air will condense into a frost layer on the surface of the heat exchanger. The frost layer not only directly increases the heat transfer resistance of the heat exchanger, but also makes it pass through Reduced air flow through the heat exchanger results in a less efficient heat exchange, so measures need to be taken to defrost. [0003] In the prior art, the heat pump unit usually enters the defrosting program when it detects that the low pressure value is lower than a certain set value, and exits the defrosting program when it detects that the coil temperature is higher than the set value; however, due to the coil temperature detection The deviation is large, and the coil temperature o...

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Application Information

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IPC IPC(8): F25B47/02F25B49/02
Inventor 刘杨柳维张靖刘志文李典志杨佳钰张欢
Owner GUANGDONG PHNIX ENERGY TECH CO LTD
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