Time-division variable-temperature cycle refrigeration (hot) water device and applications thereof

Abstract

The invention relates to a time-division variable-temperature cycle refrigeration (hot) water device and applications thereof, wherein the device comprises two or more turnover water storage tanks which are provided with two groups of pipes that lead the turnover water storage tanks to be connected in parallel; each group of the pipes which are connected in parallel are all provided with a water inlet and a water outlet; and the junctions of the water inlets or the water outlets of each group of the pipes which are connected in parallel are respectively provided with a reversing valve. The invention has the advantages of energy saving, consumption reducing, simple structure and the like.

Description

Technical field [0001] The present invention involves a time -sharing temperature -changing recycling refrigerated water / hot water device. Background technique [0002] Existing air -conditioning compressed cold water / hot water units, such as figure 1 Due to the limitations of early design concepts, the single -pressure evaporation system is designed as a single evaporator to simplify its structure and reduce costs.Its working process is mainly: refrigerant evaporates into steam in the evaporator, absorbing vaporization potential heat during evaporation, and reducing the temperature of the cold water outside the trail to produce low temperature and cold water.In order to keep the evaporation process in the evaporator, it is necessary to continuously supplement the steam generated by the refrigerant liquid side by side.The compressor absorbs the refrigerant steam from the evaporator and compresses it into a high -temperature and high -pressure refrigerant steam; the high -temperat...

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Problems solved by technology

[0003] The disadvantages of this kind of cold (hot) water unit are: (1) Although the water temperature gradually drops (rises) during the process of cold water / hot water flowing through the evaporator, the evaporation pressure can only be controlled by the lowest (highest) temperature. The water temperature at the outlet of the evaporator is determined, and the relatively high temperature at the front end of the cold water cooling process cannot be used in the refrigeration cycle. According to the principle of refrigeration, the lower the evaporation temperature (pressure), the lower the cooling efficiency; (2) Due to the single evaporator cold water / hot water unit When the evaporating pressure drops, the efficiency decreases rapidly, which limits the use of low-temperature cold water and large temperature difference technology. Increasing the temperature difference between supply and return water has great potential for improving the energy utilization efficiency of the air conditioning system, and reducing the temperature of the cold water outlet has a great impact on the dehumidification performance of the air conditioning system. The improvement of dehumidification efficiency can also significantly improve the energy utilization efficiency of the air conditioning system during the air treatment process; (3) During the refrigeration process, the temperature difference between the inlet and outlet of the cold water of the single evaporator is large, and when the outlet water temperature is near the freezing point, the evaporator It is easy to cause local overcooling and freezing due to heat exchange dead angle, which will damage the unit

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