Multi-machine-head water chilling unit

Abstract

The invention belongs to the technical field of heat exchange equipment, and particularly relates to a multi-machine-head water chilling unit. The invention aims to solve the problems that when two units of an existing in-line multi-machine-head water chilling unit operate, the heat exchange amount of a heat exchanger is not uniform, and the working effect of the whole water chilling unit is not ideal. In order to achieve the purpose, two water conveying pipelines included in at least one of two heat exchange systems of the multi-machine-head water chilling unit are arranged to be capable of independently exchanging heat with evaporators or condensers of two units while being connected in series. By means of the arrangement, the problem that the heat exchange amount of at least one set of heat exchangers (namely the two evaporators or the two condensers) of the multi-machine-head water chilling unit is not uniform can be solved to a great extent, the refrigerating capacity of the multi-machine-head water chilling unit is improved, and the energy efficiency ratio parameter of the multi-machine-head water chilling unit is optimized.

Description

technical field [0001] The invention belongs to the technical field of heat exchange equipment, and in particular relates to a multi-head chiller. Background technique [0002] The multi-head chiller includes multiple completely independent units with refrigerant circulation circuits, such as two. Most of the existing multi-head chillers are in-line. When the two units are running, the water heat exchange pipes of the evaporators and condensers of the two units are connected in series in a mixed manner, that is, the evaporation of one unit After the water entering the evaporator starts heat exchange, during the heat exchange of the evaporator, the water will flow through the evaporation of another unit for heat exchange, and then flow back to this evaporator to continue the heat exchange, thus completing the heat exchange of the two evaporators Work, the heat exchange process of the condensers of the two units is the same as the above process. [0003] In this case, becaus...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem that the heat exchange heat of the heat exchanger is not uniform when the two units of the existing in-line multi-head chiller are running, and the working effect of the overall chiller is not ideal, The present invention provides a multi-head chiller, which includes a first evaporator, a first condenser, a first compressor, a first throttling device, a second evaporator, and a second condenser , the second compressor and the second throttling device, wherein, the first evaporator, the first condenser, the first compressor and the first throttling device are communicated into one through a refrigerant delivery pipeline A closed loop, the second evaporator, the second condenser, the second compressor, and the second throttling device are connected to form another closed loop through the refrigerant delivery pipeline, and the multi-head chiller further comprising a first heat exchange system capable of exchanging heat with the first evaporator and the second evaporator and a second heat exchange system capable of exchanging heat with the first condenser and the second condenser, Both the first heat exchange system and the second heat exchange system include two water delivery pipelines, and one of the two water delivery pipelines can be connected to the first evaporator or the first condenser heat exchange, the other of the two water delivery pipelines can exchange heat with the second evaporator or the second condenser, the first heat exchange system and the second heat exchange system At least one of the configurations is: the two water delivery pipelines can exchange heat independently with the first evaporator or the first condenser and the second evaporator or the second condenser respectively string together

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