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Control method of compressor

A control method and compressor technology, applied in the field of compressor control, can solve problems such as rise, compressor speed drop, poor stability, etc., so as to improve stability, avoid sudden drop or sudden rise of speed, and expand the quality range of working power grid. Effect

Active Publication Date: 2020-05-26
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a compressor control method for the problem of poor stability caused by a sudden drop or rise in the speed of the compressor when the grid voltage is abnormal

Method used

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  • Control method of compressor
  • Control method of compressor
  • Control method of compressor

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Embodiment Construction

[0060] In order to make the above objectives, features and advantages of the present application more obvious and understandable, the specific implementation of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are explained in order to fully understand this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of this application. Therefore, this application is not limited by the specific implementation disclosed below.

[0061] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or a central element may also exist. When an element is considered to be "connected" to another element, it can be directly connected to the other element or an inter...

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Abstract

The invention provides a control method of a compressor, which comprises the steps of firstly, acquiring actual current of the compressor, and determining a first output voltage based on the actual current and specified current of the compressor; then obtaining a power grid voltage, determining a second output voltage based on the first output voltage and the power grid voltage, and outputting thesecond output voltage to the compressor; secondly, comparing the first output voltage with the second output voltage to obtain a voltage difference value; and finally, determining a current change value based on the voltage difference value and a first set proportionality coefficient, and adjusting the specified current according to the current change value so as to control the actual current. Byadopting the method, the rotating speed of the compressor is prevented from suddenly decreasing or suddenly increasing when the power grid voltage is abnormal, the running stability of the compressoris improved, the working power grid quality range of an air conditioning unit is expanded, and the requirements of regions with poor electric energy quality are met.

Description

Technical field [0001] This application relates to the field of air conditioning technology, in particular to a control method of a compressor. Background technique [0002] In recent years, with the continuous progress of social development and the continuous improvement of consumers' requirements for quality of life, the demand for household air conditioners is increasing. In household air conditioners and other similar systems, the voltage provided by the power grid is generally processed first before supplying power to the load. The load includes the compressor and the internal switching power supply of the system, among which the compressor is the main load, and the compressor output power accounts for more than 95% of the total input power at the rated output. [0003] With the promotion of the use of air conditioners, the demand in some remote areas increases, and the quality of the power grid is often not guaranteed. When the grid voltage drops or even disappears for a sh...

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Application Information

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IPC IPC(8): H02P21/22
CPCH02P2205/01H02P2205/07H02P21/22
Inventor 刘涛刘文斌杨帆张煜文陶海莉
Owner GREE ELECTRIC APPLIANCES INC
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