Combined with air -source heat pump hot water, refrigerant flow system and its control method
A variable refrigerant flow, air source heat pump technology, used in heating and cooling combinations, refrigerators, refrigeration components, etc., can solve problems such as fluctuations, and achieve the effects of flexible control, small temperature fluctuations, and strong comfort
Inactive Publication Date: 2019-05-24
UNIV OF SHANGHAI FOR SCI & TECH
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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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[0024] like figure 1The schematic diagram of the variable refrigerant flow system combined with air source heat pump hot water is shown. The indoor side mainly includes n sets of VRF indoor units 5, n sets of reheating coils 13, n sets of circulating fans 7, and n+1 electronic expansion valves (EV0 ~EVn), a hot water storage tank 11, a circulating water pump 17, a Y-shaped filter 15, domestic hot water equipment 18; the outdoor side is a VRF (variable refrigerant flow) with cross-flow heat exchange function The outdoor unit includes a multifunctional VRF outdoor heat exchanger 3, VRF outdoor heat exchanger circulation fan 22, two frequency conversion compressors (1, 8), two four-way reversing valves (2, 9), Two refrigerant flow splitters (4, 6); the control transmission line includes two thermostats (20, 21) and three temperature sensors (TE101~TE103).
[0025] like figure 2 , 3 , The VRF outdoor heat exchanger shown in 4, a VRF variable refrigerant flow system combined wi...
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The invention relates to 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 a traditional VRF air conditioner to produce domestic hot water, and a part of the domestic hot water obtained is used for Part of the domestic water is used to reheat the air supplied by the indoor air conditioner, which overcomes the influence of the dew point air supplied by the multi-connected air conditioner system on the indoor ambient temperature and the comfort of the human body; in addition, the VRF outdoor unit frosts at a lower temperature in winter Finally, the present invention uses the air source heat pump hot water system for defrosting, which overcomes the fluctuation of indoor ambient temperature caused by the reverse operation of the air conditioning system in winter; the system of the present invention can also meet the user's demand for domestic hot water throughout the year. The user can switch the operation mode according to the demand and make full use of the condensation heat. The invention has the advantages of flexible control, various choices, energy saving operation, small fluctuation of indoor environment temperature, and strong comfort.
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 ...
Claims
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IPC IPC(8): F25B29/00F25B13/00F25B41/04F25B49/02F25B47/02F25B41/20F25B41/34F25B41/40
CPCF25B13/00F25B29/003F25B49/02F25B2313/0292F25B2313/02742F25B2700/21F25B2700/2106F25B2700/21175F25B2600/25F25B2400/19F25B2347/023F25B41/20
Inventor 陈剑波陈莹赵蒙顾娟王成武
Owner UNIV OF SHANGHAI FOR SCI & TECH