Defrosting control method

A control method and technology of control steps, applied in the field of air conditioning, can solve the problems of fluctuation of indoor heat supply, slow defrosting, lack of intelligent control, etc., and achieve the effect of improving defrosting efficiency

Active Publication Date: 2015-11-25
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complexity of using the water system to defrost, and the lack of corresponding intelligent control at present, there are often fluctuations in the indoor heat supply that affect comfort, or slow defrosting due to low water temperature, and refrigerant / water heat exchangers There is a danger of being damaged by freezing during defrosting

Method used

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  • Defrosting control method

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Embodiment Construction

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0022] figure 1 It schematically shows the defrosting system diagram of the unit of the present invention, figure 1 The direction of the arrow in indicates the direction of water flow. Below in conjunction with the specific working process of the defrosting system of the present invention:

[0023] 1. Normal heating operation process

[0024] Refrigerant side: The high-temperature and high-pressure refrigerant gas coming out of the compressor 10 enters the E port from the D port of the four-way valve 20, enters the refrigerant / water heat exchanger 30, transfers heat to water, and condenses into a high-pressure medium-temperature liquid. Enter the throttling device 40, become a low-temperature and low-pressure two-phase state after throttling, ent...

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Abstract

The invention provides a defrosting control method, which comprises the following steps: pre-judgment step: judging whether a unit meets a defrosting requirement or not, wherein the defrosting requirement includes: the unit continuously operates for preset time T1, outer unit tube temperature of the unit is less than a first preset value within preset time T2, water inlet temperature of the tail end of the unit is higher than a second preset value, and water outlet temperature of the tail end of the unit is higher than a third preset value; defrosting control step: If the operation status of the unit meets the defrosting requirement, indicating that the unit enters a defrosting operation status. The defrosting control method provided by the invention can be carried out rapidly and accurately, thus the defrosting efficiency of the unit is improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, and more specifically, to a defrosting control method. Background technique [0002] Indoor end (including but not limited to fan coil, floor heating coil, low-temperature radiator, capillary network, and radiant ceiling, etc.) air-conditioning system (including multi-connected) using refrigerant, absorbing heat from the indoor environment during indoor heating and defrosting, It often causes the indoor temperature to drop by more than 2°C, affecting indoor comfort. [0003] The air-conditioning system using water at the indoor end lacks corresponding intelligent control when heating and defrosting indoors. It only judges the defrosting requirements based on the pipe temperature of the outdoor unit and ignores the situation on the water side. This often leads to fluctuations in the indoor heat supply and affects indoor comfort, or slow defrosting with the risk of freezing and cr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B47/02
Inventor 钟文朝曹浩欧阳光袁明征黄娟
Owner GREE ELECTRIC APPLIANCES INC
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