Forced cooling room refrigerating unit and control method thereof

A control method and unit technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of high compressor failure rate, poor unit stability, high energy consumption of refrigeration units, etc., to reduce the failure rate and reduce compression. The effect of reducing machine load and reducing overall energy consumption

Active Publication Date: 2022-03-18
ZHEJIANG QINGFENG REFRIGERATION EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, water-cooled screw chillers are generally used in the industry to provide cold water combined with indoor air supply equipment to cool down the forced cooling room. This kind of refrigeration unit consumes a lot of energy; and the evaporation temperature of the unit will be too high, exceeding the limit of the compressor, resulting in a high failure rate of the compressor. , poor unit stability

Method used

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  • Forced cooling room refrigerating unit and control method thereof

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Effect test

Embodiment 1

[0033] Such as figure 1A forced cooling evaporative refrigeration unit shown includes a compressor refrigeration device and a natural cooling device. The compressor refrigeration device includes a compressor 21, an evaporator 22, a refrigerant pipeline 2 and a water pipeline 1. The compressor 21 and evaporator 22 are set on the refrigerant pipeline 2, and the expansion valve, liquid storage tank, oil separator, etc. are also installed on the refrigerant pipeline 2; the water pipeline 1 includes a first water outlet and a first inlet The water outlet, the first water outlet is connected to the user end that needs to be cooled, the water pipeline 1 passes through the evaporator 22, and the water pipeline 1 is provided with a chilled water pump 11; chilled water flows in the water pipeline 1, Refrigerant flows in the refrigerant pipeline 2 . The process of evaporative cooling and cooling is as follows: the refrigerant is compressed by the compressor 21, from low-temperature and ...

Embodiment 2

[0043] An operation mode of a forced cooling evaporative cooling unit: including a manual mode and an automatic mode.

[0044] In this embodiment, the manual mode refers to manually selecting the refrigeration mode of the unit according to the needs of the user. In the shutdown state, the user can select compressor cooling or natural cooling cooling through the HMI human-machine interface. Compressor refrigeration then opens mechanical refrigeration valve 13, closes natural cooling valve 12, adopts natural cooling then opens natural cooling valve 12, closes mechanical refrigeration valve 13. Detect the position of the valve after waiting for 60 seconds for the valve to switch, and if it is abnormal, it will stop and send an alarm. With this manual switching function, customers can switch according to their needs. For example, the low temperature in winter is set to natural cooling mode, and the high temperature in summer is set to compressor cooling.

[0045] In this embodim...

Embodiment 3

[0050] In the method for controlling the unit in the forced cooling room, the unit also includes a control system for controlling the operation of the unit, and the steps are as follows:

[0051] In compressor refrigeration mode; the control method of the unit, the steps are as follows:

[0052] Step 1: The unit opens the mechanical refrigeration valve 13 and closes the natural cooling valve 12, so that the chilled water flows through the natural cooling pipe 15 first and then through the evaporator 22.

[0053] Step 2: Turn on the chilled water pump 11 to circulate the chilled water in the water pipeline 1 through the set pump cycle time, and the water flow switch on the chilled side detects the water flow signal and feeds it back to the control system.

[0054] Step 3: Determine whether to turn on the cooling water pump 331 according to the return temperature of the chilled water.

[0055] Step 4: According to the temperature of the cooling water in the water tower 3, deter...

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Abstract

The invention discloses a forced cooling room refrigerating unit and a control method thereof. The refrigerating unit comprises a compressor refrigerating device and a natural cooling device and further comprises a waterway pipeline, the waterway pipeline penetrates through the evaporator, chilled water and a refrigerant are subjected to heat exchange treatment in the evaporator, and the natural cooling device comprises a water tower, a natural cooling pipe, a spraying device and a plurality of sets of fans; the natural cooling pipe is installed on the water pipeline, the top of the water tower is provided with a cooling cavity with an upward opening and a heat dissipation cavity, the bottom section of the cooling cavity is communicated with the bottom section of the heat dissipation cavity, the natural cooling pipe is located in the cooling cavity, the spraying device sprays cooling water on the natural cooling pipe after pumping the cooling water to the top of the cooling cavity, and the fan is installed at the opening of the heat dissipation cavity. The chilled water is recycled by the water tower, so that the water resource consumption of the unit can be reduced, and the water utilization rate is improved. Through the draught fan and the spraying device, the air cooling mode and the water cooling mode are combined, the refrigeration efficiency is improved, energy consumption is reduced, and the failure rate of the compressor is reduced.

Description

technical field [0001] The invention relates to the field of refrigeration equipment, in particular to a forced cooling room refrigeration unit and a control method thereof. Background technique [0002] At present, water-cooled screw chillers are generally used in the industry to provide cold water combined with indoor air supply equipment to cool down the forced cooling room. This kind of refrigeration unit consumes a lot of energy; and the evaporation temperature of the unit will be too high, exceeding the limit of the compressor, resulting in a high failure rate of the compressor. , poor unit stability. Contents of the invention [0003] In order to solve the above problems, the purpose of the present invention is to provide a forced cooling room refrigeration unit and its control method that can reduce energy consumption and reduce the failure rate of the compressor. [0004] In order to achieve the above-mentioned purpose, the present invention adopts the following ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B1/047F25B41/40F25B41/31F25B49/02F25D17/02F28D5/02
CPCF25B1/047F25B41/40F25B41/31F25B49/022F25D17/02F28D5/02
Inventor 袁杰刘斌斌温素珍金贤松金阿龙毛君慧陈建汶谢毓豪麻林海周德强戴陈渲向延勇高万成郑秋纯王红梅温文占书剑
Owner ZHEJIANG QINGFENG REFRIGERATION EQUIP MFG
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