Method for judging defrosting of heat pump and heat pump defrosting system

Abstract

The invention provides a method for judging defrosting of a heat pump and a heat pump defrosting system. The method comprises the steps of obtaining a set of heating parameters every a preset time; obtaining the actual heating capacity Q of the heat pump according to the heating parameters; obtaining the heating attenuation rate of the heat pump according to the actual heating capacity Q and the standard heating capacity Q; when the heating attenuation rate is larger than or equal to a heating attenuation rate threshold value, entering a defrosting program. According to the method, by means ofthe heating attenuation rate obtained by conducting calculation according to the environment temperature, the inflow temperature, the outflow temperature and the outflow capacity, the time for the system to enter the defrosting program is more precise, and the defrosting effect and efficiency are improved. The heating attenuation rate threshold value is a fixed numerical value, thus the method issimpler and more convenient and easier to control in actual operation, and the improvement of the defrosting efficiency is facilitated; the defrosting stopping step is determined according to the temperature of a coiler of a fin-type heat exchanger of the heat pump, in this way, actual operation and control are facilitated, and the method is simple and easy to implement.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a method for determining defrosting of a heat pump and a heat pump defrosting system. Background technique [0002] As heat pumps are used more and more widely, the current defrosting of heat pumps depends on the temperature value of the defrosting sensor and the defrosting time to determine the time of defrosting and the next defrosting, and cannot accurately and timely determine whether the finned heat exchanger is frosted. Whether to defrost. Frequent defrosting or no defrosting has a great impact on the energy efficiency of the host. [0003] It can be seen that it is very important to accurately determine whether the heat pump is in defrosting. Contents of the invention [0004] The problem solved by the invention is how to accurately determine whether the heat pump is in defrosting. [0005] In order to solve the above problems, as an aspect of the present invention...

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Problems solved by technology

[0002] As heat pumps are used more and more widely, the current defrosting of heat pumps depends on the temperature value of the defrosting sensor and the defrosting time to determine the time of defrosting and the next defrosting, and cannot accurately and timely determine whether the finned heat exchanger is frosted. Do you need to defrost

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