Method for controlling standby restart of centrifugal-type water cooling unit

A chiller and control method technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of unit standby, unit damage, frequent start and stop of units, etc., to reduce the difference between high and low pressure, reduce the hidden danger of surge, The effect of reducing the hidden danger of frequent start and stop

Active Publication Date: 2015-04-29
GREE ELECTRIC APPLIANCES INC +1
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Problems solved by technology

[0002] The inherent characteristics of the centrifugal chiller have brought about its large cooling capacity. However, under the condition of small load, it is limited by the surge limit of the centrifugal compressor. In order to ensure the reliable operation of the unit, the unit cannot be unloaded normally, resulting in low water temperature. The unit is on s

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  • Method for controlling standby restart of centrifugal-type water cooling unit
  • Method for controlling standby restart of centrifugal-type water cooling unit

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Embodiment Construction

[0014] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0015] Such as figure 1 and figure 2 As shown, according to the centrifugal chiller restart control method of the present invention, the method includes: Step S1: Obtain the operating parameters before standby, and compare them with the preset parameters to determine the cause of standby; Step S2: When the standby reason is water temperature standby , set the restart target parameters according to the incremental learning algorithm; step S3: control the unit restart according to the restart target parameters. In the present invention, when the cause of standby is water temperature standby, the restart target parameter is set according to the incremental learning algorithm, and the restart of the unit is controlled according to the restart target parameter, so that the operating load of the unit matches the working condition, so that the unit can run stab...

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Abstract

The invention provides a method for controlling standby restart of a centrifugal-type water cooling unit. The method includes step S1, acquiring running parameters before standby, and comparing the running parameters with preset parameters to determine a standby reason; step S2, when the standby reason is water temperature standby, setting restart target parameters according to an incremental learning algorithm; step S3, controlling restart of the unit according to the restart target parameters. According to the method, when the standby reason is water temperature standby, the restart target parameters are set according to the incremental learning algorithm, and restart of the unit is controlled according to the restart target parameters, so that running load of the unit is enabled to be matched with working conditions, the unit is enabled to run under small-load working conditions, potential safety hazards caused by frequent start and stop of the unit are lowered, and the unit is enabled to be more energy saving. In addition, high-low pressure difference of the unit can be lowered, so that the unit is enabled to be away from a surge area, and potential surge possibility of the unit is lowered.

Description

technical field [0001] The invention relates to the control field of a centrifugal chiller, in particular to a control method for restarting a centrifugal chiller in standby. Background technique [0002] The inherent characteristics of the centrifugal chiller have brought about its large cooling capacity. However, under the condition of small load, it is limited by the surge limit of the centrifugal compressor. In order to ensure the reliable operation of the unit, the unit cannot be unloaded normally, resulting in low water temperature. The unit is in standby at the standby temperature. In the case of no increase in the terminal load, the unit restarts after a period of time, but at this time the unit still cannot adapt to the small load condition, and the standby occurs again, so the cycle of standby and restart occurs, causing the unit to start and stop frequently, causing serious damage to the unit damage. Contents of the invention [0003] The present invention aim...

Claims

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Application Information

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IPC IPC(8): F25B49/02
CPCF25B49/02F25B2500/06F25B2500/13
Inventor 万亮周宇潘翠刘贤权王娟周堂金成召
Owner GREE ELECTRIC APPLIANCES INC
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