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Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors

A control method and multi-compressor technology, which are applied in heating and ventilation control systems, refrigerators, heating methods, etc., can solve the problems of complex multi-compressor parallel and multi-connection devices, etc.

Active Publication Date: 2013-03-27
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the multi-compressor parallel multi-connection device is very complicated. In the process of intelligent defrosting, the sequence of actions of each control component in the control process, that is, the control sequence is very important, which can ensure the normal and reliable operation of the air conditioner. Entering the defrost process, performing the defrost process, and pushing out the defrost, none of which is addressed in the prior art

Method used

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  • Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors
  • Intelligent defrosting control method for parallel multiple on-line unit with multiple compressors

Examples

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example 1

[0028] (1) When the multi-split machine is running in heating mode, when it runs continuously for 30 minutes and meets the following conditions for 3 minutes, the outdoor electric control system will issue a defrosting command: if the outdoor ambient temperature detected by the outdoor temperature sensor is ≤0°C, And when the defrosting temperature detected by the defrosting temperature sensor 32 is ≤0.8×outdoor ambient temperature -10°C;

[0029] (2) After the first DC inverter compressor 1 receives the defrosting command, the operating frequency drops to 30Hz and runs for 20 seconds, then the operating frequency rises to 80Hz to start the defrosting process;

[0030](3) After the second DC variable frequency compressor 2 receives the start instruction, the operating frequency drops to 30Hz and runs for 20 seconds, then the operating frequency rises to 80Hz to start the defrosting process;

[0031] (4) During the defrosting process of the first DC inverter compressor 1 and th...

example 2

[0042] (1) When the multi-connected unit is running in heating mode, when the continuous operation is 30 minutes and the following conditions are met for 2 minutes, the outdoor electric control system will issue a defrosting command: if the outdoor ambient temperature detected by the outdoor temperature sensor 33 is >0°C , and when the defrosting temperature detected by the defrosting temperature sensor 32 is ≤0.2×outdoor ambient temperature -10°C;

[0043] (2) After the first DC inverter compressor 1 receives the defrosting command, the operating frequency drops to 30Hz and runs for 15 seconds, then the operating frequency rises to 90Hz to start the defrosting process;

[0044] (3) After the second DC variable frequency compressor 2 receives the start command, the operating frequency drops to 30Hz and runs for 15 seconds, then the operating frequency rises to 90Hz to start the defrosting process;

[0045] (4) During the defrosting process of the first DC inverter compressor 1...

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Abstract

The invention discloses an intelligent defrosting control method for a parallel multiple on-line unit with multiple compressors. The intelligent defrosting control method comprises the following steps: (1) when the multiple on-line unit operates in a heating mode, continuously operates for 30-60 minutes, lasts for 2-5 minutes and satisfies one of the following conditions, an outdoor electrical control system emits a defrosting command; (2) a first direct-current inverter compressor starts a defrosting process after receiving the defrosting command; (3) a second direct-current inverter compressor starts a defrosting process after receiving a starting command; and (4) the first direct-current inverter compressor and the second direct-current inverter compressor exit the defrosting process if one of the following conditions is satisfied in the defrosting process. The intelligent defrosting control method is used for coordinating and controlling the action sequences of the components in the intelligent defrosting process, so that the air conditioner can normally enter the defrosting process, process the defrosting process and exit the defrosting process.

Description

technical field [0001] The invention relates to the field of air-conditioning control, in particular to an intelligent defrosting control method for multi-compressor parallel connection and multi-connection. Background technique [0002] For heat pump air conditioners, the intelligent defrosting technology in the heating mode operation process is very important. This is because when the air conditioner is in heating operation, the outdoor temperature is low and the air humidity is high, It is easy to frost. After the outdoor heat exchanger is frosted, the frost layer blocks the passage between the aluminum fins of the outdoor heat exchanger, reducing the ventilation rate, and the reduction of the ventilation rate affects the heat exchange effect of the outdoor heat exchanger, making the frost layer thicker. The thicker it is, the worse the heat transfer effect is, thus forming a vicious circle. Therefore, a defrosting process must be carried out at regular intervals to mel...

Claims

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Application Information

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IPC IPC(8): F24F11/00F25B47/00
Inventor 郑坚江程德威
Owner NINGBO AUX ELECTRIC
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