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 invention relates to a cooling (hot) water device for time-sharing variable temperature circulation circulation. Background technique: [0002] Existing air-conditioning compressor cold (hot) water units, such as figure 1 , due to the limitation of the early design concept, are designed as a single evaporator single pressure evaporation system to simplify its structure and reduce costs. Its working process is mainly as follows: the refrigerant evaporates into steam in the evaporator, absorbs the latent heat of vaporization during evaporation, and reduces the temperature of the cold water outside the coil to produce low-temperature cold water. In order to make the evaporation process in the evaporator continue continuously, it is necessary to continuously replenish the refrigerant liquid and discharge the steam generated in the evaporator. The compressor sucks the refrigerant vapor from the evaporator and compresses it into high-temperature and h...

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Problems solved by technology

[0003] The disadvantages of this cold (hot) water unit are: (1) Although the water temperature gradually drops (rises) when the cold (hot) water flows 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 (hot) water When the evaporating pressure of the unit decreases, the efficiency decreases rapidly, which limits the utilization 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 negative impact on the dehumidification performance of the air conditioning system. The improvement of the 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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