Frequency conversion centrifuge and control method of hot gas bypass valve therein

A technology of hot gas bypass valve and control method, which is applied in the field of frequency conversion centrifuges, can solve problems such as large operating pressure ratio, inability to realize safe operation, surge of frequency conversion centrifuges, etc., and achieve the effect of improving reliability

Active Publication Date: 2020-09-04
CHONGQING MIDEA GENERAL REFRIGERATING EQUIP
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Problems solved by technology

[0002] The frequency conversion centrifuge on the market before, when the ambient temperature is high, due to the operating characteristics of the centrifuge, it cannot operate safely under a small load
The main reason is that when the ambient temperature is high, the operating pressure ratio of the frequency conversion centrifuge (absolute exhaust pressure of the compressor / absolute suction pressure of the compressor) is relatively large. damage to the impeller

Method used

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  • Frequency conversion centrifuge and control method of hot gas bypass valve therein
  • Frequency conversion centrifuge and control method of hot gas bypass valve therein
  • Frequency conversion centrifuge and control method of hot gas bypass valve therein

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] The method for controlling the hot gas bypass valve in the frequency conversion centrifuge, the non-transitory computer readable storage medium, and the frequency conversion centrifuge according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0031] figure 1 It is a flow chart of the control method of the hot gas bypass valve in the frequency conversion centrifuge according to one embodiment of the present invention. Among them, such as figure 2 As shown...

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Abstract

The invention discloses a frequency conversion centrifuge and a method for controlling a hot gas bypass valve therein. The frequency conversion centrifuge includes a compressor, and the hot gas bypass valve is arranged between a suction pipe and an exhaust pipe of the compressor. The method includes the following steps: when the frequency conversion centrifuge is in the running state, the guide vane opening, the operating pressure ratio and the upper limit of the operating frequency of the compressor are obtained, wherein the operating pressure ratio is the absolute pressure of the exhaust gas of the compressor and the absolute pressure of the suction air. Ratio; calculate the critical frequency of the frequency conversion centrifuge according to the opening of the guide vane and the operating pressure ratio; control the opening of the hot gas bypass valve according to the critical frequency and the upper limit of the operating frequency. By controlling the opening of the hot gas bypass valve, the method can make the frequency conversion centrifuge run safely with a small load under high ambient temperature and high pressure ratio, and at the same time, there will be no compressor surge phenomenon under small load operation , Improve the reliability of frequency conversion centrifuge operation.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method for controlling a hot gas bypass valve in a frequency conversion centrifuge, a non-temporary computer-readable storage medium, and a frequency conversion centrifuge. Background technique [0002] The frequency conversion centrifuge on the market before, when the ambient temperature is high, due to the operating characteristics of the centrifuge, it cannot operate safely under a small load. The main reason is that when the ambient temperature is high, the operating pressure ratio of the frequency conversion centrifuge (absolute exhaust pressure of the compressor / absolute suction pressure of the compressor) is relatively large. will cause damage to the impeller. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the first object of the present in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02F25B41/00F25B41/20
CPCF25B49/022F25B41/40
Inventor 王永李镇杉
Owner CHONGQING MIDEA GENERAL REFRIGERATING EQUIP
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