Variable refrigerant flow system combined with air source heat pump hot water and control method of variable refrigerant flow system

Abstract

The invention relates to a variable refrigerant flow system combined with air source heat pump hot water and a control method of the variable refrigerant flow system. According to the variable refrigerant flow system, condenser heat of a traditional VRF air conditioner in summer is recycled effectively for preparing domestic hot water, part of the obtained domestic hot water is used for domestic water, the other part of the obtained domestic hot water is used for reheating air supplied by an indoor air conditioner, and thus the influence of dew-point air supply of a multi-split air conditioner system on the indoor environment temperature and the human body comfort is eliminated; and in addition, after the VRF outdoor unit is frosted at the low temperature in winter, defrosting is conducted through an air source heat pump hot water system, and the defect of fluctuation, caused by reverse operation of the air conditioner system in winter, of the indoor environment temperature is overcome. The system also can meet the needs of users on the domestic hot water all year around. The users can switch the operation mode by the users according to the needs, the condenser heat is fully utilized, and the variable refrigerant flow system and the control method have the beneficial effects that control is flexible, selection is diversified, energy is saved during operation, the indoor environment temperature fluctuation is small, and the comfort is high.

Description

technical field [0001] The invention relates to an air conditioning system, in particular to a variable refrigerant flow system combined with air source heat pump hot water and a control method thereof. Background technique [0002] With the continuous growth of my country's national economy and the continuous improvement of per capita living standards, people's requirements for quality of life, living environment, indoor thermal comfort, and air quality are getting higher and higher. However, the traditional household split air conditioner or window air conditioner has gradually become a seasonal air conditioner due to various factors such as poor thermal comfort, difficulty in ensuring indoor air quality, outdoor frosting in northern winter, and waste heat waste of the air conditioning system. Sexual commodities are increasingly difficult to adapt to environmental requirements. Therefore, the design concept of VRF variable refrigerant flow system combined with air source ...

AI Technical Summary

Problems solved by technology

[0008] The present invention is aimed at the problem that the air-conditioning system is increasingly demanding, and proposes a variable refrigerant flow system combined with air source heat pump hot water and its control method, which effectively recycles and utilizes the summer condensed heat of traditional VRF air conditioners to produce Take domestic hot water, part of the obtained domestic hot water is used for domestic water, and part is used for reheating the indoor air-conditioning air supply. In addition, after the VRF (Variable Refrigerant Flow) outdoor unit is frosted at a low temperature in winter, the present invention uses the air source heat pump hot water system to defrost. Defrost in the opposite direction (the reverse operation of the air conditioning system in winter will cause fluctuations in the indoor ambient temperature); the system of the present invention can also meet the user's demand for domestic hot water throughout the year

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