Fixed-frequency refrigerant pump inlet cavitation-erosion-resistant system and control method thereof

A refrigerant pump, anti-cavitation technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as unfavorable on-site installation and product promotion, can not guarantee the avoidance of refrigerant pumps, low reliability, etc., to reduce The effect of refrigerant charge, reduction of design capacity, and reliable operation

Active Publication Date: 2017-12-01
GUANGDONG HIWAVE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the scheme of the above-mentioned prior art, the design capacity of the liquid receiver is very large, the amount of refrigerant charge is large, and the entire refrigerant pump device is large in size and high

Method used

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  • Fixed-frequency refrigerant pump inlet cavitation-erosion-resistant system and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of anti-cavitation system at the inlet of the fixed-frequency refrigerant pump in this embodiment, such as figure 1 As shown, it includes a refrigerant pump 1, a liquid receiver 2, a condenser 3, a fan 4, a refrigerant temperature sensor 5, a refrigerant pressure sensor 6, a liquid level sensor 7, an electric two-way regulating valve 8 and a controller 9; The output end of the receiver 3 is connected to the input end of the liquid accumulator 2, the output end of the liquid accumulator 2 is connected to the input end of the refrigerant pump 1, and the refrigerant temperature sensor 5 and the refrigerant pressure sensor 6 are installed on the refrigerant pump 1 The inlet pipeline of the motor, the electric two-way regulating valve 8 is set on the outlet pipeline of the refrigerant pump 1, the liquid level sensor 7 is connected with the liquid receiver 2, and the fan 4 is connected with the condenser 3; among them, the refrigerant pump 1 and the fan 4 , the refrige...

Embodiment 2

[0050] The control method of a fixed-frequency refrigerant pump inlet anti-cavitation system of this embodiment includes the following points:

[0051]1) When it is detected that the subcooling degree of the refrigerant drops to the lower limit value set for the subcooling degree, start to increase the speed of the fan 4 to increase the subcooling degree of the refrigerant until the subcooling degree of the refrigerant reaches the supercooling degree degree setting value, then stop the speed regulation of the blower fan 4 and keep the current speed constant, and the opening degree of the electric two-way regulating valve 8 remains unchanged during this process;

[0052] 2) If the speed of the fan 4 reaches the maximum value, but the subcooling degree still cannot reach the set value of the supercooling degree, the fan 4 will keep running at the maximum speed, and the opening of the electric two-way regulating valve 8 will remain unchanged;

[0053] 3) If the speed of the fan 4...

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Abstract

The invention relates to the technical field of cavitation-erosion-resistant systems, in particular to a fixed-frequency refrigerant pump inlet cavitation-erosion-resistant system and a control method thereof. The fixed-frequency refrigerant pump inlet cavitation-erosion-resistant system comprises a refrigerant pump, a liquid accumulator, a condenser, a fan, a refrigerant temperature sensor, a refrigerant pressure sensor, a liquid level sensor, an electric two-way regulating valve and a controller. The output end of the condenser is connected with the input end of the liquid accumulator. The output end of the liquid accumulator is connected with the input end of the refrigerant pump. The refrigerant temperature sensor and the refrigerant pressure sensor are mounted on an inlet pipeline of the refrigerant pump. The electric two-way regulating valve is arranged on an outlet pipeline of the refrigerant pump. The liquid level sensor is connected with the liquid accumulator. The fan is connected with the condenser. Through the cavitation-erosion-resistant system and the control method thereof, the design capacity and refrigerant charge amount of the liquid accumulator can be greatly reduced, meanwhile, the liquid accumulator does not need to be designed in the high position away from a refrigerant pump inlet, and the system is compact in structure, low in cost and reliable in operation.

Description

technical field [0001] The invention relates to the technical field of anti-cavitation systems, in particular to a fixed-frequency refrigerant pump inlet anti-cavitation system and a control method thereof. Background technique [0002] The use of refrigerant pumps in computer room air conditioners to achieve natural cooling and energy saving is a new energy-saving technology that has emerged in recent years. However, there are great technical risks in the application of this technology at present. It is easy to damage the refrigerant pump after a long time. [0003] At present, in order to prevent the cavitation of the refrigerant pump, the existing technology generally installs a large-capacity liquid receiver at the inlet of the refrigerant pump to ensure that there is refrigerant supply in the liquid receiver at any time, and at the same time, the The liquid receiver is hung at a higher height (usually more than 1 meter) to prevent the refrigerant from flashing at the i...

Claims

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Application Information

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IPC IPC(8): F25B41/00F25B43/00F25B49/00F25B41/20F25B41/40
CPCF25B41/00F25B43/006F25B49/00F25B2500/03F25B2500/17F25B2500/01F25B2400/19F25B2600/11F25B2600/13Y02B30/70
Inventor 李敏华刘家权陈方强杨顺富陈露润乡建飞
Owner GUANGDONG HIWAVE TECH
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