CN-116972520-B - Method and device for controlling compressor, air conditioner and storage medium

CN116972520BCN 116972520 BCN116972520 BCN 116972520BCN-116972520-B

Abstract

The application relates to the technical field of intelligent household appliances and discloses a method for controlling a compressor, wherein a driving circuit of the compressor comprises a rectifying circuit used for rectifying alternating current input voltage, a boosting circuit, an input side of which is connected with the rectifying circuit, an output side of which is connected with a direct current bus and used for boosting the output voltage of the rectifying circuit. The determination of the target direct current bus voltage is respectively based on the phase voltage peak value and the alternating current input voltage of the compressor, so that the utilization rate of the direct current bus voltage is improved. The application also discloses a device for controlling the compressor, an air conditioner and a storage medium.

Inventors

LIU YUNTAO
DENG CHUANG
SHI LEI
DONG JINSHENG
DONG XIAOLI
CHEN QIANG

Assignees

青岛海尔空调器有限总公司
青岛海尔空调电子有限公司
海尔智家股份有限公司

Dates

Publication Date: 20260512
Application Date: 20220422

Claims (9)

1. A method for controlling a compressor, a driving circuit of the compressor comprises a rectifying circuit for rectifying an alternating input voltage, a boosting circuit, an input side of which is connected with the rectifying circuit, and an output side of which is connected with a direct current bus for boosting the output voltage of the rectifying circuit, and the method is characterized in that the method comprises the following steps: obtaining a phase voltage peak value of the compressor; Determining a first direct current bus voltage according to the phase voltage peak value; obtaining an alternating current input voltage; determining a second direct current bus voltage according to the alternating current input voltage; determining a target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage; Wherein determining the target dc bus voltage from the first dc bus voltage and the second dc bus voltage comprises: Determining a relation between the first direct current bus voltage and the second direct current bus voltage, wherein the second direct current bus voltage is the minimum value of the target direct current bus voltage; under the condition that the first direct current bus voltage is smaller than the second direct current bus voltage, determining that the target direct current bus voltage is the second direct current bus voltage; And determining the target direct current bus voltage as the first direct current bus voltage under the condition that the first direct current bus voltage is larger than or equal to the second direct current bus voltage.
2. The method of claim 1, wherein determining the target dc bus voltage based on the first dc bus voltage and the second dc bus voltage further comprises: determining the relation between the target direct current bus voltage and the limit value of the direct current bus voltage; under the condition that the target direct current bus voltage is larger than the direct current bus voltage limiting value, the target direct current bus voltage is adjusted to the direct current bus voltage limiting value; And under the condition that the target direct current bus voltage is smaller than or equal to the limit value of the direct current bus voltage, keeping the target direct current bus voltage unchanged.
3. The method of claim 1, wherein determining the first dc bus voltage based on the phase voltage peak value comprises: obtaining a target utilization rate of the direct current bus voltage; And determining the ratio of the peak value of the phase voltage to the target utilization rate of the direct current bus voltage as the first direct current bus voltage.
4. The method of claim 1, wherein determining the second dc bus voltage based on the ac input voltage comprises: Determining an average value of the alternating current input voltage according to the alternating current input voltage; determining an alternating current input voltage peak value according to the alternating current input voltage average value; and determining the second direct current bus voltage according to the alternating current input voltage peak value.
5. The method of claim 4, wherein determining the second dc bus voltage based on the ac input voltage peak value comprises: Obtaining a boosting coefficient; And determining the product of the alternating current input voltage peak value and the boost coefficient as a second direct current bus voltage.
6. The method according to any one of claims 1 to 5, wherein obtaining a phase voltage peak of the compressor comprises: obtaining direct axis current and quadrature axis current of the compressor; Determining the direct-axis voltage and the quadrature-axis voltage of the compressor according to the direct-axis current and the quadrature-axis current; and determining the phase voltage peak value of the compressor according to the direct axis voltage and the quadrature axis voltage.
7. An apparatus for controlling a compressor comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling a compressor according to any one of claims 1 to 6 when the program instructions are run.
8. An air conditioner, comprising: a compressor (11); A driving circuit (12) connected to the compressor (11) for outputting a driving signal to the compressor (11), and, The apparatus for controlling a compressor of claim 7; wherein the drive circuit (12) comprises: a rectifying circuit (121) for rectifying an ac input voltage; The boosting circuit (122) is connected with the rectifying circuit (121) at the input side, and is connected with the direct current bus at the output side, and is used for boosting the output voltage of the rectifying circuit (121); and an inverter circuit (123) having an input side connected to the DC bus and an output side connected to the compressor (11).
9. A storage medium storing program instructions which, when executed, perform the method for controlling a compressor of any one of claims 1 to 6.

Description

Method and device for controlling compressor, air conditioner and storage medium Technical Field The application relates to the technical field of intelligent household appliances, in particular to a method and a device for controlling a compressor, an air conditioner and a storage medium. Background At present, the air conditioner realizes the flow of the refrigerant in the pipeline through the operation of the compressor. The operation of the compressor under different working conditions is realized through the control of the driving circuit on the compressor. The related art method for controlling the compressor includes obtaining a load parameter and a power supply voltage of the compressor, calculating a boost coefficient of a power factor correction (PFC, power Factor Correction) boost circuit according to the load parameter, calculating a direct current reference voltage of a driving circuit according to the boost coefficient and the power supply voltage, and performing feedback control on the power factor correction boost circuit by using the direct current reference voltage as a target value to adjust a direct current bus voltage. In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: the method can control the compressor, and reduce the loss of devices in the booster circuit by adjusting the voltage of the direct current bus. The boost factor is determined based on the load parameter of the compressor, and the dc reference voltage is determined based on the boost factor and the supply voltage. When the output value of the power supply voltage is smaller, the calculated direct current reference voltage is smaller than the target value, so that the utilization rate of the direct current bus voltage is low. Disclosure of Invention The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows. The embodiment of the disclosure provides a method and a device for controlling a compressor, an air conditioner and a storage medium, so as to improve the utilization rate of direct current bus voltage. In some embodiments, the driving circuit of the compressor comprises a rectifying circuit used for rectifying alternating current input voltage, a boosting circuit, wherein the input side of the boosting circuit is connected with the rectifying circuit, the output side of the boosting circuit is connected with a direct current bus and used for boosting the output voltage of the rectifying circuit, the method comprises the steps of obtaining a phase voltage peak value of the compressor, determining a first direct current bus voltage according to the phase voltage peak value, obtaining alternating current input voltage, determining a second direct current bus voltage according to the alternating current input voltage, and determining a target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage. Optionally, determining the target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage comprises determining a relation between the first direct current bus voltage and the second direct current bus voltage, determining the target direct current bus voltage to be the second direct current bus voltage when the first direct current bus voltage is smaller than the second direct current bus voltage, and determining the target direct current bus voltage to be the first direct current bus voltage when the first direct current bus voltage is larger than or equal to the second direct current bus voltage. Optionally, determining the target direct current bus voltage according to the first direct current bus voltage and the second direct current bus voltage further comprises determining a relation between the target direct current bus voltage and a direct current bus voltage limiting value, adjusting the target direct current bus voltage to the direct current bus voltage limiting value when the target direct current bus voltage is larger than the direct current bus voltage limiting value, and keeping the target direct current bus voltage unchanged when the target direct current bus voltage is smaller than or equal to the direct current bus voltage limiting value. Optionally, determining the first dc bus voltage from the phase voltage peak includes obtaining a target dc bus voltage utilization, and determining a ratio of the phase voltage peak to the target dc bus voltage utilization as the first dc bus voltage. Optionally, determining the second direct current bus voltage according to the alternating current input voltage co