An evaporative cooling chiller, its control method and control system

A chiller and control method technology, applied to air conditioning systems, control input related to air characteristics, control input related to system state, etc., can solve the problem of hindering the popularization and application of evaporative cooling technology, affecting unit energy consumption, waste of water resources, etc. problems, to avoid long-term high-load operation, improve service life, and reduce waste

Active Publication Date: 2020-02-11
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing evaporative condensing units do not effectively control the water volume and air volume, which leads to excessive waste of water resources. Larger water supply volume and air volume will also generate huge noise, and too large or too small water-air ratio will affect The energy consumption of the unit and other issues hinder the popularization and application of evaporative cooling technology and its units

Method used

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  • An evaporative cooling chiller, its control method and control system
  • An evaporative cooling chiller, its control method and control system
  • An evaporative cooling chiller, its control method and control system

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Embodiment Construction

[0035] The invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] Such as figure 1 As shown, the evaporative cooling chiller includes a compressor 1 , a condenser 2 , a throttle valve 3 and a shell-and-tube evaporator 4 . The condenser adopts a tower-type water cooling system, including a frequency conversion fan 5 , a frequency conversion water pump 6 and a water tank 10 . The air inlet of the condenser is provided with a wet bulb temperature sensor 7, the air outlet is provided with a wet bulb temperature sensor 8, and the compressor exhaust pipe is provided with a pressure sensor 9.

[0037] Such as figure 2 As shown, the control system of the evaporative cooling chiller proposed by the present invention includes:

[0038] The humidity collection module is used to collect the wet bulb temperature of the air entering and exiting the condenser;

[0039] The pressure acquisition module is used to acquire the dis...

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Abstract

The invention discloses an evaporative cooling type water chilling unit as well as a control method and a control system thereof. The control method comprises steps as follows: detecting wet bulb temperature of inlet and outlet air of a condenser and exhaust pressure of a compressor, and controlling frequency of a variable-frequency fan and a variable-frequency water pump according to range of theexhaust pressure and wet bulb temperature value of the inlet and outlet air of the condenser. According to the invention, optimal energy efficiency of the compressor of the unit in a normal operatingrange can be guaranteed, and water waste is reduced; by means of control for water volume and air volume supply, the dry spot phenomenon on the surface of the heat exchanger is reduced, unstable operation state produced by high-voltage protection is reduced, and reliability of the unit after operation is improved.

Description

technical field [0001] The invention relates to the field of air conditioning equipment, in particular to an evaporative cooling chiller, a control method and a control system thereof. Background technique [0002] In recent years, my country has vigorously developed rail transit, and the ventilation and air-conditioning equipment of subway stations has gradually attracted people's attention. Due to problems such as difficult location selection of cooling towers and high energy consumption in subway stations, subway air conditioners need high reliability, low failure rate and energy-saving products. Evaporative condensing units can just solve these problems. [0003] However, the existing evaporative condensing units do not effectively control the water volume and air volume, which leads to excessive waste of water resources. Larger water supply volume and air volume will also generate huge noise, and too large or too small water-air ratio will affect The energy consumption ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/77F24F11/85F24F11/64F24F5/00F24F110/10F24F140/10
CPCF24F5/0035Y02B30/70
Inventor 覃业星陈培生刘洋程琦黄凯亮钟海玲刘思源
Owner GREE ELECTRIC APPLIANCES INC
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