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Water chilling unit and control method and device thereof

The technology of a water chiller and a control method, which is applied to refrigerators, refrigeration components, compressors, etc., can solve problems such as the imbalance of lubricating oil in compressors and affect the normal operation of chillers, so as to avoid unbalanced lubricating oil, prolong service life, improve The effect of stability

Active Publication Date: 2019-10-29
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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  • Water chilling unit and control method and device thereof
  • Water chilling unit and control method and device thereof
  • Water chilling unit and control method and device thereof

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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 water chilling unit and a control method and device thereof. The water chilling unit comprises at least two compressors, wherein each compressor at least corresponds to one oil return electromagnetic valve. The method comprises the steps that each compressor is identified to be in an energy regulation state; the working state of an oil level switch in each compressor is acquired; according to the working state of the oil level switches, the oil return electromagnetic valves corresponding to the compressors are controlled to be opened or closed. According to the control method, when each compressor is in the energy regulation state, the oil return electromagnetic valves corresponding to the compressors are controlled to be opened or closed according to the workingstate of the oil level switches in the compressors; and the working state of the oil level switches is matched with the working state of the oil return electromagnetic valves, so that lubricating oilin the compressors in the water chilling unit is always in a safe range, the problem of lubricating oil imbalance is avoided, the service life of the compressors is prolonged, and the stability of thewater chilling unit is improved.

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