Compressor control method, control apparatus and control system

Patent metadata

Field	Value
Publication number	US-11486384-B2
Application number	US-201817261277-A
Country	US
Kind code	B2
Filing date	Dec 19, 2018
Priority date	Jul 23, 2018
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

Disclosed are a compressor control method, control apparatus and control system. The method includes: receiving a cylinder switching instruction, and detecting operating parameters of a compressor; determining whether a cylinder switching operation is completed according to the operating parameters of the compressor; and after it is determined that the cylinder switching operation is completed, performing torque compensation.

First claim

What is claimed is:

1. A compressor control method, comprising:
receiving a cylinder switching instruction and detecting a plurality of operating parameters of a compressor;
determining whether a cylinder switching operation is completed according to the plurality of operating parameters of the compressor; and
performing torque compensation after determining that the cylinder switching operation is completed,
wherein detecting the plurality of operating parameters of the compressor comprises:
detecting a current operating parameter of the compressor when receiving the cylinder switching instruction; and
detecting a real-time operating parameter of the compressor every first preset time interval,
wherein determining whether the cylinder switching operation is completed according to the plurality of operating parameters of the compressor comprises:
calculating a ratio of the real-time operating parameter to the current operating parameter;
comparing the ratio with a cylinder switching threshold, wherein the cylinder switching threshold is a preset value configured to represent that the cylinder switching is completed; and
determining that the cylinder switching operation is completed when the ratio is greater than or equal to the cylinder switching threshold.

2. The compressor control method according to claim 1 , further comprising:
detecting a current need for a plurality of operating conditions before receiving the cylinder switching instruction, and determining whether the current need for the plurality of operating conditions satisfies a cylinder switching condition; and
generating the cylinder switching instruction when the current need for the plurality of operating conditions satisfies the cylinder switching condition, wherein the cylinder switching instruction is configured to control an action of a solenoid valve to perform the cylinder switching operation.

3. The compressor control method according to claim 1 , further comprising:
starting a timer after detecting the current operating parameter of the compressor; and
stopping the timer and clearing the timer after determining that the cylinder switching operation is completed.

4. The compressor control method according to claim 3 , further comprising:
detecting a timing time after starting the timer, and determining whether the timing time reaches a cylinder switching waiting time, wherein the cylinder switching waiting time is a preset longest waiting time; and
prompting, with an alarm, that the cylinder switching operation has failed and the solenoid valve or the compressor has malfunctioned when the timing time reaches the cylinder switching waiting time.

5. The compressor control method according to claim 1 , wherein the plurality of operating parameters of the compressor comprise at least one of an operating power of the compressor, an operating voltage of the compressor, or an operating current of the compressor.

6. A compressor control apparatus, comprising:
a detecting module configured to receive a cylinder switching instruction and detect a plurality of operating parameters of a compressor;
a determining module configured to determine whether a cylinder switching operation is completed according to the plurality of operating parameters of the compressor; and
a compensation module configured to perform torque compensation after determining that the cylinder switching operation is completed,
wherein the detecting module comprises:
a first detecting unit configured to detect a current operating parameter of the compressor when receiving the cylinder switching instruction; and
a second detecting unit configured to detect a real-time operating parameter of the compressor every first preset time interval;
the determining module comprises:
a calculating unit configured to calculate a ratio of the real-time operating parameter to the current operating parameter;
a comparing unit configured to compare the ratio with a cylinder switching threshold, wherein the cylinder switching threshold is a preset value configured to represent that the cylinder switching is completed; and
a determining unit configured to determine that the cylinder switching operation is completed when the ratio is greater than or equal to the cylinder switching threshold.

7. The compressor control apparatus according to claim 6 , further comprising:
a switching module configured to determine a current need for a plurality of operating conditions before receiving the cylinder switching instruction, and to determine whether the current need for the plurality of operating conditions satisfies a cylinder switching condition; and
an instruction generating module configured to generate the cylinder switching instruction when the current need for the plurality of operating conditions satisfies the cylinder switching condition, wherein the cylinder switching instruction is configured to control an action of a solenoid valve to perform the cylinder switching operation.

8. The compressor control apparatus according to claim 6 , wherein the plurality of operating parameters of the compressor comprise at least one of an operating power of the compressor, an operating voltage of the compressor, or an operating current of the compressor.

9. A compressor control system, comprising:
a drive controller configured to detect the plurality of operating parameters of a compressor after receiving a cylinder switching instruction, determine whether a cylinder switching operation is completed according to the operating parameters of the compressor, and perform torque compensation after determining that the cylinder switching operation is completed,
wherein the drive controller configured to detect the plurality of operating parameters of a compressor comprising:
detecting a current operating parameter of the compressor when receiving the cylinder switching instruction; and
detecting a real-time operating parameter of the compressor every first preset time interval,
wherein the drive controller configured to determine whether the cylinder switching operation is completed according to the plurality of operating parameters of the compressor comprising:
calculating a ratio of the real-time operating parameter to the current operating parameter;
comparing the ratio with a cylinder switching threshold, wherein the cylinder switching threshold is a preset value configured to represent that the cylinder switching is completed; and
determining that the cylinder switching operation is completed when the ratio is greater than or equal to the cylinder switching threshold.

10. The compressor control system according to claim 9 , further comprising:
a solenoid valve configured to perform the cylinder switching operation after receiving the cylinder switching instruction; and
a master controller configured to send the cylinder switching instruction to the solenoid valve and the drive controller.

11. The compressor control system according to claim 10 , wherein the master controller is configured to determine whether a current need for the plurality of operating conditions satisfies a cylinder switching condition by detecting the current need for the plurality of operating conditions, and send the cylinder switching instruction to the solenoid valve and the drive controller when the current need for the plurality of operating conditions satisfies the cylinder switching condition.

12. The compressor control system according to claim 11 , wherein the plurality of operating parameters of the compressor detected by the drive controller comprise at least one of an operating power of the compressor, an operating voltage of the compressor, or a

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• He Xiaolin
• Li Yang
• Liu Wenbin

Classifications

• F25B2600/23

  Time delays · CPC title

• F25B2700/151

  of the compressor motor · CPC title

• F24F11/65

  for selecting an operating mode · CPC title

• F04B49/065 Primary

  and making use of computers · CPC title

• F24F11/86

  by controlling compressors within refrigeration or heat pump circuits · CPC title