Water cooling unit and control method thereof

A technology of water chiller and control method, which is applied in the direction of hull ventilation/heating/cooling, ship parts, ships, etc., and can solve the problems of frequent loading and unloading of compressors, so as to improve rapid stability, reduce impact, and reduce frequent start and stop Effect

Active Publication Date: 2017-12-22
GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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  • Abstract
  • Description
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Problems solved by technology

[0003] In order to solve the above technical problems, a chiller and its control method are provided that can solve the problem of frequent loading and unloading of compressors when the bypass pipeline is in an open state

Method used

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  • Water cooling unit and control method thereof

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the tooling for assembling display components of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] Such as figure 1 The chilled water unit shown includes a condenser 1, a compressor 2 and an evaporator 3, and a bypass line 4 is provided between the outlet of the compressor 2 and the inlet of the evaporator 3 for connecting the compressor 2 The exhaust gas is bypassed into the evaporator 3. By adopting the bypass pipeline 4, the capacity of the unit can be effectively reduced to meet the customer's demand for lower load, reduce the frequent start and stop of the compressor 2, and improve the reliability of the compressor 2. performance, unit ...

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Abstract

The invention provides a water cooling unit and a control method thereof. The water cooling unit comprises a condenser, a compressor and an evaporator, and a by-pass pipeline is arranged between an outlet of the compressor and an inlet of the evaporator and used for making exhaust gas of the compressor enter the evaporator in a bypassing mode. According to the water cooling unit and the control method thereof, by arranging the bypass pipeline, the capability of the unit can be further reduced to meet the demand of a customer for a lower load, frequent start and stop of the compressor are reduced, and the reliability of the compressor, the adaptability of the unit and the user experience degree are improved; by arranging a bypass valve on the upper portion of the condenser, the impact generated by the exhaust gas of the compressor on the interior of the evaporator can be reduced, and by comparing an actual capacity value of the compressor with a target capacity value of the compressor, the compressor and the bypass pipeline are adjusted, so that it can be ensured that after the bypass pipeline is opened, the compressor can run stably, and the fast stability of the whole system is improved.

Description

technical field [0001] The invention relates to the field of air conditioning and refrigeration, in particular to a chiller and a control method thereof. Background technique [0002] At present, the marine screw chiller basically adopts the fixed frequency screw unit, and its energy adjustment range is between 20% and 100%. With the improvement of customer demand, the demand for low load is getting higher and higher, which depends on the compressor itself. The unloading capacity can no longer meet the needs of customers. The hot gas bypass method can be used to further reduce the capacity of the unit to meet the customer's demand for lower loads. However, most marine screw chillers use dry evaporators. The tilting and swaying of the midship hull caused the problem of suction liquid; the hot gas bypass scheme is to direct the exhaust gas of the compressor to the evaporator inlet. If the temperature is too high, it will have an impact on the heat transfer in the evaporator, ...

Claims

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Application Information

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IPC IPC(8): B63J2/12
CPCB63J2/12
Inventor 陈东红姜国璠刘清龙周江峰杨二玲樊启迪廖子清
Owner GREE ELECTRIC APPLIANCES INC OF ZHUHAI
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