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Control method of compressor in variable-frequency air conditioner and variable-frequency air conditioner

A technology of frequency conversion air conditioner and control method, applied in heating and ventilation control systems, refrigerators, heating methods, etc., can solve the problems of large circuit loss, large energy consumption, efficiency optimization space, etc., to reduce loss and improve power utilization efficiency , Control the effect of small amount of computation

Active Publication Date: 2021-03-19
QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit loss of this PFC control method is large, and there is a large room for energy efficiency optimization

Method used

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  • Control method of compressor in variable-frequency air conditioner and variable-frequency air conditioner
  • Control method of compressor in variable-frequency air conditioner and variable-frequency air conditioner
  • Control method of compressor in variable-frequency air conditioner and variable-frequency air conditioner

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Embodiment Construction

[0040] figure 1 It is a schematic block diagram of an inverter air conditioner according to an embodiment of the present invention, and the inverter air conditioner may generally include: an inverter compressor 30, a drive circuit 10, a control device 40, a PFC booster circuit 120, and the like.

[0041] As is well known to those skilled in the art, the largest power consumption component of an air conditioner is the compressor. The inverter air conditioner is an air conditioner that uses an inverter compressor. By adjusting the operating speed of the inverter compressor, the inverter compressor is always in the best working condition, which can greatly improve the energy consumption ratio of the air conditioner.

[0042] The drive circuit 10 is used to provide a drive signal to the variable frequency compressor 30 , which may generally include: a rectifier circuit 110 , a power factor correction circuit (PFC circuit) 120 , an inverter circuit 130 and the like. Its working pr...

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Abstract

The invention provides a control method of a compressor in a variable frequency air conditioner and the variable frequency air conditioner. A driving circuit of the compressor is provided with a rectifying circuit used for rectifying power supply voltage and a PFC boosted circuit used for boosting output voltage of the rectifying circuit, output of the PFC boosted circuit is connected with a direct-current bus, and the control method comprises the steps that load parameters and the power supply voltage of the compressor are obtained; a boosting coefficient of the PFC boosted circuit is calculated according to the load parameters; direct-current reference voltage of the driving circuit is calculated according to the boosting coefficient and the power supply voltage; and feedback control isperformed on the PFC boosted circuit by taking the direct-current reference voltage as a target value so as to adjust the voltage of the direct-current bus. According to the scheme, the loss of the PFC boosted circuit and related circuit elements is effectively reduced, the energy consumption efficiency is improved, the PFC boosted circuit is particularly suitable for intelligent air conditionersor intelligent air conditioner products, and the energy consumption efficiency requirements of the products are met while various intelligent requirements of users are met.

Description

technical field [0001] The invention relates to air conditioner control, in particular to a control method for a compressor in an inverter air conditioner and the inverter air conditioner. Background technique [0002] With the continuous progress of society and the continuous development of science and technology, people pay more and more attention to sustainable development, among which energy consumption is the most important aspect. At present, relevant national departments have approved the promulgation of the mandatory national standard GB21455-2019 "Energy Efficiency Limits and Energy Efficiency Classes of Room Air Conditioners". The implementation date of this standard is July 1, 2020. [0003] In the above background, the energy efficiency requirements of air conditioners are also increased, that is, it is required to reduce the power consumption of air conditioners as much as possible while increasing the cooling capacity and heating capacity of air conditioners. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02F24F11/88F24F11/64F24F11/89
CPCF25B49/022F24F11/88F24F11/64F24F11/89Y02B70/10
Inventor 许国景徐贝贝史为品赵晓明曹壬艳刘聚科高保华
Owner QINGDAO HAIER AIR CONDITIONER GENERAL CORP LTD
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