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Chiller and its control method and device

A technology of water chiller and control method, which is applied in refrigerators, refrigeration components, compressors, etc., and can solve problems affecting the normal operation of water chillers and imbalance of lubricating oil in compressors, etc.

Active Publication Date: 2022-04-22
CHONGQING MIDEA GENERAL REFRIGERATING EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual work, the lubricating oil in one or more of the compressors may flow into other compressors or air conditioning systems, causing an imbalance of lubricating oil in the one or more compressors, affecting the normal operation of the chiller

Method used

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  • Chiller and its control method and device
  • Chiller and its control method and device
  • Chiller and its control method and device

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Embodiment Construction

[0058] 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.

[0059] The water chiller and its control method and device according to the embodiments of the present invention will be described below with reference to the accompanying drawings.

[0060]It should be noted that the chiller in this embodiment includes an oil return solenoid valve and at least two compressors, wherein each compressor corresponds to at least one oil return solenoid valve.

[0061] figure 1 It is a schematic flowchart of a control method of a chiller in an embodiment disclosed in the present invention. Such as ...

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Abstract

The invention discloses a chiller and its control method and device, wherein the chiller includes at least two compressors, and each of the compressors corresponds to at least one oil return solenoid valve, and the method includes: identifying each of the The compressors are all in the energy regulation state; the working state of the oil level switch in the compressor is obtained; according to the working state of the oil level switch, the oil return electromagnetic valve corresponding to the compressor is controlled to open or close. In this method, when each compressor is in the energy regulation state, according to the working state of the oil level switch in the compressor, the oil return electromagnetic valve corresponding to the compressor is controlled to open or close; The working state of the valve is matched, so that the lubricating oil in the compressor in the chiller is always within a safe range, avoiding the problem of unbalanced lubricating oil, prolonging the service life of the compressor and improving the stability of the chiller.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a chiller and its control method and device. Background technique [0002] At present, with the continuous growth of the chiller market, the application of parallel system units is becoming more and more extensive. Parallel system refers to multiple compressors sharing a refrigerant system to achieve cooling or heating. For a parallel unit, the lubricating oil of multiple compressors needs to reach oil balance, that is, the amount of lubricating oil contained in each compressor needs to be greater than a threshold. However, in actual work, the lubricating oil in one or more compressors may flow into other compressors or air-conditioning systems, causing an imbalance of lubricating oil in the one or more compressors, affecting the normal operation of the chiller. Contents of the invention [0003] The present invention aims to solve one of the technical problems in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02F25B31/00
CPCF25B49/02F25B31/004F25B2600/25
Inventor 杨海涛万翔梁涛
Owner CHONGQING MIDEA GENERAL REFRIGERATING EQUIP