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Centrifugal water chilling unit and control method thereof

A chiller and centrifugal technology, applied in the direction of refrigerators, refrigeration components, compressors, etc., can solve the problem of high gas temperature at the inlet of the compressor, and achieve the effects of avoiding excessive gas temperature, improving work energy efficiency, and improving evaporation performance

Inactive Publication Date: 2018-12-28
ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a centrifugal chiller and its control method to solve the problem of excessively high gas temperature at the compressor inlet caused by the direct bypass of the hot gas by the compressor in the prior art

Method used

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  • Centrifugal water chilling unit and control method thereof
  • Centrifugal water chilling unit and control method thereof
  • Centrifugal water chilling unit and control method thereof

Examples

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Embodiment Construction

[0012] Embodiments of the invention are described in detail below, but the invention can be practiced in many different ways as defined and covered by the claims.

[0013] Please refer to Figure 1 to Figure 3 As shown, according to the embodiment of the present invention, the centrifugal chiller includes a compressor 4, a heat exhaust heat exchanger 1, an economizer 2 and a heat absorption heat exchanger 3, and the compressor 4 has a third exhaust port 47, a supplementary Air port 46 and air return port 41, heat exhaust heat exchanger 1 includes first exhaust port 14 and first liquid discharge port 15, economizer 2 includes first liquid inlet port 22, second exhaust port 21 and second liquid discharge port port 23, the third exhaust port 47 of the compressor 4 is connected to the inlet 11 of the heat removal heat exchanger 1, the first exhaust port 14 is connected to the heat absorption heat exchanger 3, and the first liquid discharge port 15 is connected to the economizer T...

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Abstract

The invention provides a centrifugal water chilling unit and a control method thereof. The centrifugal water chilling unit comprises a compressor, a heat absorption heat exchanger, an economizer and aheat absorption heat exchanger, wherein the compressor is provided with a third exhaust port, a gas supplementing port and a gas returning port, the heat extraction heat exchanger comprises a first exhaust port and a first liquid discharging port, the economizer comprises a first liquid feeding port, a second exhaust port and a second liquid discharging port, the third exhaust port of the compressor is connected to an inlet of the heat extraction heat exchanger, the first exhaust port is connected to the heat absorption heat exchanger, the first liquid discharging port is connected to the first liquid feeding port of the economizer, the second exhaust port is connected to the heat absorption heat exchanger, and the second exhaust port is connected to the gas supplementing port. Accordingto the centrifugal water chilling unit, the problem that the gas temperature at an inlet of a compressor is too high due to the fact that the compressor directly bypasses hot gas in the prior art canbe solved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a centrifugal chiller and a control method thereof. Background technique [0002] The surge of the centrifugal compressor is an inherent characteristic. In the centrifugal chiller using the centrifugal compressor, a hot gas bypass system is usually set up to prevent the centrifugal compressor from operating in the surge area. In the existing centrifugal chiller In the hot gas bypass system, the throttling in the refrigeration cycle and the hot gas bypass are independent; when the hot gas bypass is enabled, the operating status of the unit will change suddenly, which will affect the stable operating status of the unit. [0003] In the existing hot gas bypass system, the way of directly bypassing the hot gas is usually adopted, such as connecting the exhaust pipe of the compressor to the intake pipe of the compressor, or leading the gas from the top of the condenser of the...

Claims

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Application Information

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IPC IPC(8): F25B1/10F25B41/04F25B49/02F25B41/20
CPCF25B1/10F25B49/02F25B41/40F25B41/20
Inventor 潘祖栋汪新民罗毅
Owner ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT
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