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

A heat pump and heating capacity technology, applied in lighting and heating equipment, damage protection, refrigeration safety arrangements, etc., can solve the problem of not being able to accurately and timely determine whether the finned heat exchanger is frosted, and is beneficial to actual operation and control , convenient implementation, and improved defrosting effect and efficiency

Inactive Publication Date: 2020-01-17
NINGBO AUX ELECTRIC
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  • Abstract
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  • Claims
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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 t

Method used

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

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Embodiment Construction

[0044] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0045] In the present invention, by adding a flowmeter in the waterway and feeding back the signal to the control board to read the actual flow rate, and according to the temperature of the in and out water read by the control board, the heating capacity of the main engine in this state can be calculated, the actual heating capacity and the temperature in the main board can be calculated. Compared with the stored standard heating capacity, if there is a decrease and continuous attenuation, it can be determined that the fin heat exchanger has frosted and can be defrosted. The actual operating capacity of the main engine is calculated by the feedback value of the flow meter and the inlet and outlet water temperature, and the heating decay rat...

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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...

Claims

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Application Information

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IPC IPC(8): F25B47/02F25B49/02
CPCF25B47/02F25B49/02F25B2347/02
Inventor 李鹏
Owner NINGBO AUX ELECTRIC
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