Variable capacity compressor operation mode determination method and device, variable capacity compressor, and air conditioner

Patent metadata

Field	Value
Publication number	US-11808261-B2
Application number	US-201817285802-A
Country	US
Kind code	B2
Filing date	Dec 14, 2018
Priority date	Oct 19, 2018
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

Disclosed are a variable capacity compressor operation mode determination method and device, a variable capacity compressor and an air conditioner. The variable capacity compressor operation mode determination method includes: detecting a current value of a compressor at present as A1 before switching an operation mode of the compressor; detecting the current value of the compressor at present as A2 after switching the operation mode of the compressor and reaching a preset time; comparing A1 and A2, determining that the switching of the operation mode of the compressor is successful when a ratio relationship between A1 and A2 satisfies a preset condition, and determining that switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies a preset condition.

First claim

What is claimed is:

1. A variable capacity compressor operation mode determination method, comprising:
controlling a difference value P0 between a discharge pressure P1 and a suction pressure P2 of a compressor within a first preset range before switching an operation mode of the compressor;
detecting a current value of the compressor at present as A1 before the switching of the operation mode of the compressor;
switching the operation mode of the compressor, and after a preset time period, detecting the current value of the compressor at present as A2; and
comparing A1 and A2, and determining that the switching of the operation mode of the compressor is successful when a ratio relationship between A1 and A2 satisfies a preset condition, and determining that the switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies the preset condition.

2. The variable capacity compressor operation mode determination method according to claim 1 , further comprising: if the difference value P0 between the discharge pressure P1 and the suction pressure P2 of the compressor is less than a set lowest value of the first preset range, increasing the difference value P0 between the discharge pressure P1 and the suction pressure P2 by increasing an operation frequency of the compressor.

3. The variable capacity compressor operation mode determination method according to claim 1 , further comprising: if the difference value P0 between the discharge pressure P1 and the suction pressure P2 of the compressor is greater than a set highest value of the first preset range, reducing the difference value P0 between the discharge pressure P1 and the suction pressure P2 of the compressor by at least one of reducing the operation frequency of the compressor or by pressure relief which is performed by switching on a compressor suction-discharge side bypass mechanism.

4. The variable capacity compressor operation mode determination method according to claim 1 , further comprising: controlling an operation frequency of the compressor within a second preset range and then detecting the current value of the compressor at present before switching the operation mode of the compressor.

5. The variable capacity compressor operation mode determination method according to claim 4 , further comprising: increasing the operation frequency of the compressor if the operation frequency of the compressor is less than a set lowest value of the second preset range, and reducing the operation frequency of the compressor if the operation frequency of the compressor is greater than a set highest value of the second preset range.

6. The variable capacity compressor operation mode determination method according to claim 1 , wherein the compressor comprises at least two cylinders; the switching of the operation mode of the compressor comprises a first switching mode and a second switching mode; in the first switching mode, the compressor is switched to an operation mode in which a number of the cylinders in the working state is increased; in the second switching mode, the compressor is switched to an operation mode in which a number of the cylinders in the working state is reduced.

7. A variable capacity compressor operation mode determination device, configured to implement the variable capacity compressor operation mode determination method of claim 1 , comprising:
a regulation unit, configured to control a difference value P0 between a discharge pressure P1 and a suction pressure P2 of a compressor within a first preset range before a detection unit starting to execute;
the detection unit, configured to detect a current value of the compressor at present as A1 before switching an operation mode of the compressor, switch the operation mode of the compressor, and after a preset time period, detect the current value of the compressor at present as A2; and
a comparison determination unit, configured to compare A1 with A2, and determine that the switching of the operation mode of the compressor is successful when the ratio relationship between A1 and A2 satisfies a preset condition, and determine that the switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies a preset condition.

8. A computer device, comprising a memory and a processor, wherein a computer program is stored on the memory and executable on the processor, and the processor executes the computer program to implement the variable capacity compressor operation mode determination method of claim 1 .

9. A storage device comprising computer-executable instructions, the storage device comprising the computer-executable instructions is configured to, when executed by a computer processor, perform the variable capacity compressor operation mode determination method of claim 1 .

10. A variable capacity compressor, comprising the device of claim 7 .

11. An air conditioner, comprising the device of claim 7 .

12. A variable capacity compressor operation mode determination method, comprising:
controlling a difference value P0 between a discharge pressure P1 and a suction pressure P2 of a compressor within a first preset range before switching an operation mode of the compressor;
detecting a current value of the compressor at present as A1 before the switching of the operation mode of the compressor;
switching the operation mode of the compressor, and after a preset time period, detecting the current value of the compressor at present as A2; and
comparing A1 with A2, and determining that the switching of the operation mode of the compressor is successful when the compressor is switched to an operation mode in which a number of cylinders in a working state is increased and a relationship between A1 and A2 satisfies a preset condition A2≥m*A1, wherein m≥1, and determining that the switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies the preset condition.

13. The variable capacity compressor operation mode determination method according to claim 12 , wherein a value range of m is [1.2, 2].

14. A variable capacity compressor operation mode determination method, comprising:
controlling a difference value P0 between a discharge pressure P1 and a suction pressure P2 of a compressor within a first preset range before switching an operation mode of the compressor;
detecting a current value of the compressor at present as A1 before the switching of the operation mode of the compressor;
switching the operation mode of the compressor, and after a preset time period, detecting the current value of the compressor at present as A2; and
comprising: comparing A1 with A2, and determining that the switching of the operation mode of the compressor is successful when the compressor is switched to an operation mode in which a number of cylinders in a working state is reduced and the ratio relationship between A1 and A2 satisfies a preset condition A2≤A1/m, wherein m≥1, and determining that the switching of the operation mode of the compressor is failed when the ratio relationship between A1 and A2 dissatisfies the preset condition.

15. The variable capacity compressor operation mode determination method according to claim 14 , wherein a value range of m is [1.2, 2].

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Liu Hua
• Li Longfei
• Xue Handong
• Ni Yi
• Fu Yingsheng
• Rong Yaopeng
• Zhang Zhongqiu
• Liu Qunbo
• Xu Ke

Classifications

• F04B51/00 Primary

  Testing machines, pumps, or pumping installations · CPC title

• F04B25/005

  with two cylinders · CPC title

• F04B49/065 Primary

  and making use of computers · CPC title

• F04C23/001 Primary

  of similar working principle · CPC title

• F04C28/065

  Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable · CPC title