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Motor cooling device, motor cooling control method and device and water chilling unit

A technology for motor cooling and control methods, applied in cooling/ventilation devices, electromechanical devices, refrigeration components, etc., can solve problems such as insufficient motor cooling, and achieve the effects of improving stable operation and reliability, avoiding failures and shutdowns, and wide adaptability

Pending Publication Date: 2021-03-16
ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a motor cooling device, a motor cooling control method and device, and a chiller, so as to at least solve the problem of insufficient motor cooling in dual-compressor chillers in the prior art

Method used

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  • Motor cooling device, motor cooling control method and device and water chilling unit
  • Motor cooling device, motor cooling control method and device and water chilling unit
  • Motor cooling device, motor cooling control method and device and water chilling unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046]This embodiment provides a motor cooling device, which is applied to a unit including at least two compressors, and can ensure sufficient cooling of the motor under full-load conditions.

[0047] figure 1 It is a schematic structural diagram of the motor cooling device provided by Embodiment 1 of the present invention, as shown in figure 1 As shown, the motor cooling device includes:

[0048] The first cooling pipeline 10 is connected between the liquid intake end 30 and the motor cavity of the compressor 40. The first cooling pipeline 10 is provided with a first valve 11, and the opening of the first valve 11 is controlled according to the user's operation;

[0049] The second cooling pipeline 20 is connected between the liquid intake end 30 and the motor chamber of the compressor 40. The second cooling pipeline 20 is provided with a second valve 21, and the opening of the second valve 21 is automatically adjusted according to the load of the unit. control.

[0050] ...

Embodiment 2

[0062] This embodiment provides a motor cooling control method, which is implemented based on the motor cooling device described in the above embodiments.

[0063] image 3 It is a flow chart of the motor cooling control method provided by Embodiment 2 of the present invention, such as image 3 As shown, the method includes the following steps:

[0064] S301. Detect the load condition of the unit, and automatically control the second valve on the second cooling pipeline according to the load condition of the unit.

[0065] S302. Receive a user operation, and control the first valve on the first cooling pipeline according to the user operation.

[0066] Wherein, the load condition of the unit refers to the current load of the unit, which can be represented by a unit load rate, for example. User operation refers to the user's operation to control the first valve. It may be that the user directly adjusts the first valve by hand, or the user inputs a control command for the fir...

Embodiment 3

[0080] This embodiment gives a specific example to illustrate the above-mentioned motor cooling device and motor cooling control method. However, it should be noted that this specific example is only for better illustrating the present application and does not constitute an improper limitation of the present application. . Explanations of terms that are the same as or corresponding to those in the foregoing embodiments will not be repeated in this embodiment.

[0081] In this embodiment, the unit includes two compressors connected in series, and liquid is taken from the condenser to cool the motor as an example.

[0082] like Figure 4 As shown, the unit includes: a compressor 1 and a compressor 2 connected in series, a condenser 3 , a filter 4 , a throttling device 5 and an evaporator 6 . One end of the first cooling pipeline (that is, the manual cooling adjustment pipeline) is connected to the bottom of the condenser shell tube or the condenser liquid collection bag, and t...

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Abstract

The invention discloses a motor cooling device, a motor cooling control method and device and a water chilling unit. The motor cooling device is applied to a unit comprising at least two compressors,and comprises a first cooling pipeline connected between a liquid taking end and motor cavities of the compressors, wherein a first valve is arranged on the first cooling pipeline, and the opening degree of the first valve is controlled according to user operation; and a second cooling pipeline connected between the liquid taking end and motor cavities of the compressors, wherein a second valve isarranged on the second cooling pipeline, and the opening degree of the second valve is automatically controlled according to the unit load condition. Through manual cooling adjustment and real-time automatic cooling adjustment, a motor is cooled in a combined mode, the device adapts to operation working conditions with different compressor heating values, it is guaranteed that the motor is sufficiently cooled, the proper motor operation winding temperature is achieved, a combined control scheme based on the first cooling pipeline and the second cooling pipeline is flexible and adjustable, adaptability is wide, and the stable reliability of motor operation is improved.

Description

technical field [0001] The invention relates to the field of unit technology, in particular to a motor cooling device, a motor cooling control method and device, and a chiller. Background technique [0002] At present, the common chillers are generally in the form of single-stage single-stage or single-stage two-stage compression, which are suitable for general air-conditioning conditions or general low-temperature heat pump conditions. With the vigorous promotion of coal-to-electricity conversion in northern my country in recent years and the diversification of industrial needs, users not only need to meet the cooling conditions of conventional air conditioners, but also ultra-high temperature heat pump units that require high water temperature heat pump conditions are becoming more and more common. Because chillers with single-machine single-stage or single-stage two-stage compression cannot meet this demand, chillers with two-machine single-stage compression or two-stage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K9/19H02K9/193H02K9/20H02K9/00F25B31/00F25B41/42
CPCF25B31/008F25B2400/075H02K9/19H02K9/193H02K9/20
Inventor 杨诗波周宇刘贤权黄成武
Owner ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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