Defrosting control device and defrosting control method for air conditioning system, and air conditioning system

Abstract

The present invention provides a defrosting control device, control method and air-conditioning system for an air-conditioning system, wherein the air-conditioning system includes a compressor (1), an indoor heat exchanger (2), an outdoor heat exchanger (3) and a throttling device ( 4), wherein, the control device includes: a judging unit for judging whether the outdoor heat exchanger (3) has reached the level where defrosting is required; an execution unit for controlling the throttling device according to the judgment result of the judging unit Action to defrost when needed. The present invention uses the executive unit to adjust the throttling device to control the defrosting, cancels the original control through the four-way valve reversing, and can effectively prevent the indoor heat exchanger from evaporating and absorbing heat during defrosting, causing indoor The ambient temperature is lowered, which increases the indoor ambient temperature, avoids slow temperature rise, reduces energy loss, reduces noise and abnormal noise, reduces power consumption, improves operational reliability, and prevents problems such as compressor oil shortage and poor lubrication.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a defrosting control device for an air conditioning system, a control method and an air conditioning system. Background technique [0002] The frosting and defrosting problem of the air source heat pump system in the prior art is one of the key technical issues affecting the low-temperature heating capacity and heating effect of the air conditioner. The defrosting process has an impact on the heating performance, noise, comfort, and reliability of the air conditioner. significantly. When the outdoor ambient temperature is lower than 5°C, the air conditioner is prone to frost and its performance rapidly decays, resulting in a decrease in the heating capacity of the heat exchanger and insufficient heat supply. Existing conventional air conditioners generally use reverse cycle defrosting, that is, during the defrosting process, the air conditioner operates in c...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the disadvantage of poor comfort in the defrosting process of the air conditioning system in the prior art, thereby providing a control device, a control method and an air conditioning system for defrosting the air conditioning system

Images