Double-temperature double-compressor water cooling unit and refrigerating control method thereof

Abstract

The invention provides a double-temperature double-compressor water cooling unit and a refrigerating control method thereof and belongs to the technical field of air conditioner equipment. The double-temperature double-compressor water cooling unit comprises a unit shell provided with an inner cavity, the unit shell is provided with a high-temperature water return opening, a medium-temperature water feeding / discharging opening and a low-temperature water outlet, and the unit shell is internally provided with a high-temperature shell-tube pipe heat exchange device communicating with the high-temperature water return opening and a low-temperature shell-tube type heat exchange device communicating with the low-temperature water outlet; a switching structure is arranged between the high-temperature shell-tube pipe heat exchange device and the low-temperature shell-tube type heat exchange device, the high-temperature shell-tube pipe heat exchange device communicates with a high-temperature compression refrigeration loop located on the outer side of the unit shell in two directions, the low-temperature shell-tube type heat exchange device communicates with a low-temperature compression refrigeration loop located on the outer side of the unit shell in two directions, the low-temperature compression refrigeration loop and the high-temperature compression refrigeration loop are both connected with a control module, and the switching structure is connected with the control module. The double-temperature double-compressor water cooling unit has the advantages of being low in investment cost, high in heat exchange efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning equipment, and in particular relates to a dual-temperature dual-compressor water chiller and a refrigeration control method thereof. Background technique [0002] With the development of air-conditioning technology, there are both air-conditioning indoor units using refrigerant heat exchange and air-conditioning terminals using water heat exchange in an air-conditioning environment. For example, in the existing technology, "cold radiant ceiling + independent fresh air The air conditioning form of "system" has attracted more and more attention from the industry. This type of system uses cold water at about 18°C ​​in the cold radiant ceiling to take away the sensible heat and humidity load in the room, and uses cold water at about 7°C in the independent fresh air system to take away the total heat load and indoor latent heat load of the fresh air, which can not only reduce the air condition...

AI Technical Summary

Problems solved by technology

[0005] Although the above scheme meets the different requirements of multiple indoor units or heat exchange terminals in the same air conditioning system for evaporation temperature or condensation temperature, realizes the purpose of saving the initial investment of the air conditioning system and improving energy efficiency, but the structure of the scheme is relatively complicated. And it is impossible to adjust the ratio of medium-temperature water output to low-temperature water output according to the indoor high and low load conditions to effectively and quickly meet the load changes in functional areas; moreover, the heat exchange effect of the evaporator in the above scheme is limited, and the energy-saving effect needs to be further improved

Images