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Defrosting method for heat pump unit

A heat pump unit and initialization technology, used in heat pumps, compressors, refrigerators, etc., can solve the problems of incomplete defrosting, affecting service life, and safety of heat pumps, and achieve complete defrosting, cost saving, and valve opening adjustment. Value accurate effect

Active Publication Date: 2020-12-08
ZHEJIANG AMA & HIEN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the incomplete defrosting of the heat pump in the prior art, which has potential safety hazards and affects the service life, so as to provide a complete defrosting and eliminate the potential safety hazards during defrosting, Defrost method of heat pump unit with long service life

Method used

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Embodiment Construction

[0023] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

[0025] A method for defrosting a heat pump unit, comprising:

[0026] First, the temperature sensor is used to monitor the return water temperature and the current ambient temperature of the heat pump unit in real time. Since different return water temperatures correspond to corresponding saturation temperatures, the s...

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Abstract

The invention relates to the technical field of heat pump defrosting, and particularly relates to a defrosting method for a heat pump unit. The defrosting method comprises the steps that the first valve opening degree during initial defrosting is obtained according to the current evaporation temperature and the current environment temperature of the heat pump unit; the current operation second pressure and the current evaporation temperature of the heat pump unit are continuously monitored in real time, the corresponding first pressure is obtained according to the current evaporation temperature, and a valve opening degree adjusting value is obtained according to the first pressure, the second pressure, a logically-set proportionality coefficient, an integral time coefficient and a differential time coefficient; and after the first valve opening degree is continuously adjusted according to the valve opening degree adjusting value, defrosting is completed. According to the defrosting method for the heat pump unit, defrosting is complete, and potential safety hazards during defrosting are eliminated.

Description

technical field [0001] The invention relates to the technical field of heat pump defrosting, in particular to a method for defrosting a heat pump unit. Background technique [0002] In the current heat pump market, many heat pumps in low-temperature and high-humidity areas such as along the river often have abnormal defrosting in winter. Frost layer exists, so will produce vicious circle, every time the frost layer that can't be removed will accumulate more and more. And most of the defrosting logic is to open the electronic expansion valve on the main road of the system when defrosting. When the evaporator defrosts, the water flows from top to bottom, and the defrosting of the bottom is relatively slow. Condensation cannot occur on the compressor, resulting in high pressure in the system and even protection, causing damage to the compressor and affecting the normal service life of the system. Contents of the invention [0003] Therefore, the technical problem to be solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/02F25B31/00F25B47/02F25B49/02
CPCF25B30/02F25B49/02F25B47/02F25B31/00
Inventor 仇春伟谢志超随壮壮周晓中王震枪文顺强
Owner ZHEJIANG AMA & HIEN TECH
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