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Air-cooled natural cooling chiller and its control method

A natural cooling, chiller technology, applied in heating and ventilation control systems, control inputs involving air characteristics, space heating and ventilation control inputs, etc. Lower condensing temperatures, longer service life, and enhanced reliability

Active Publication Date: 2021-12-24
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the high condensation temperature of the air-cooled natural cooling chiller in the related technology, which affects the service life of the compressor, no effective solution has been proposed yet

Method used

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  • Air-cooled natural cooling chiller and its control method
  • Air-cooled natural cooling chiller and its control method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In preferred embodiment 1 of the present invention, a chiller is provided, specifically, figure 1 An optional schematic diagram showing the structure of the unit, such as figure 1 As shown, the unit includes:

[0026] Compression refrigeration cycle system, including: a compressor 1, a condenser 2, an electronic expansion valve 4 and an evaporator 5 connected in sequence;

[0027] A natural cooling circulation system, comprising: a natural cooling water pump 6, a natural cooling coil 7 and an intermediate heat exchanger 8 connected in sequence;

[0028] The control valves are respectively connected with the chilled water inlet pipe, the evaporator 5 and the intermediate heat exchanger 8, and are used to control the passage of chilled water into the evaporator 5 for heat exchange, or into the intermediate heat exchanger 8 for heat exchange.

[0029] In the above-mentioned embodiment, a compression refrigeration circulation system and a natural cooling circulation syste...

Embodiment 2

[0037] In the preferred embodiment 2 of the present invention, a chiller control method is provided, which is applied to the chiller in the above-mentioned embodiment 1. Specifically, figure 2 An alternative flowchart showing the method, such as figure 2 As shown, the method includes the following steps S202-S204:

[0038] S202: detecting the condensation temperature, the ambient temperature and the circulating water temperature of the natural cooling circulation system;

[0039] S204: Control the switch of the natural cooling water pump and the conduction mode of the control valve according to the condensing temperature, the ambient temperature and the circulating water temperature.

[0040]The present invention utilizes the characteristics of higher condensation temperature and lower natural cooling water temperature of the compression refrigeration cycle system in the high temperature season in summer, and realizes the effect of reducing the condensation temperature by ...

Embodiment 3

[0055] Based on the chiller control method provided in the above-mentioned embodiment 2, in the preferred embodiment 3 of the present invention, a storage medium containing computer-executable instructions is also provided, and when the computer-executable instructions are executed by the computer processor, the To implement the above-mentioned chiller control method.

[0056] The present invention utilizes the characteristics of higher condensation temperature and lower natural cooling water temperature of the compression refrigeration cycle system in the high temperature season in summer, and realizes the effect of reducing the condensation temperature by turning on the water pump and adjusting the circulation flow path of the frozen water, thereby increasing the service life of the compressor and enhancing Crew reliability.

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Abstract

The invention discloses an air-cooled natural cooling chiller and its control method, wherein the unit includes: a compression refrigeration cycle system, including: a compressor, a condenser, an electronic expansion and an evaporator connected in sequence; a natural cooling cycle system , including: free cooling water pumps, free cooling coils and intermediate heat exchangers connected in sequence; control valves, respectively connected with chilled water inlet pipes, evaporators, and intermediate heat exchangers, are used to control the flow of chilled water into the evaporator Heat exchange, or through the intermediate heat exchanger for heat exchange. The invention solves the problem in the prior art that the air-cooled natural cooling chiller has a high condensation temperature and affects the service life of the compressor, improves the service life of the compressor, and enhances the reliability of the unit.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air-cooled natural cooling chiller and a control method thereof. Background technique [0002] The air-cooled natural cooling chiller adopts the scheme of sharing the fan of the vapor compression refrigeration cycle and the natural cooling cycle. However, during cooling operation in summer, due to the high ambient temperature and the high condensation temperature of the vapor compression refrigeration cycle, the compressor will deviate from the design working condition for a long time, and long-term operation will reduce the service life of the compressor. [0003] In the prior art, an exhaust duct is added to the condenser, and an axial fan is used to discharge the hot air generated by the heat exchange of the condenser to the outside atmosphere through the exhaust duct, so as to improve the heat exchange effect by timely exhausting the air. However, this scheme inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F5/00F24F11/84F25B41/40F24F110/10F24F140/20
CPCF24F5/0003F24F5/001F24F11/84F24F2110/10F24F2140/20
Inventor 刘思源
Owner GREE ELECTRIC APPLIANCES INC