Compressor frequency regulation method, control apparatus, heat exchange device and electronic device

Patent metadata

Field	Value
Publication number	US-12435915-B2
Application number	US-202318215067-A
Country	US
Kind code	B2
Filing date	Jun 27, 2023
Priority date	Dec 28, 2020
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A compressor frequency regulation method includes acquiring a first exhaust temperature of a compressor operating at a first operating frequency; determining that the first exhaust temperature is greater than or equal to a first preset temperature; controlling the compressor to perform frequency reduction processing, the frequency reduction processing reducing the first operating frequency to a second operating frequency, such that a second exhaust temperature of the compressor operating at the second operating frequency is less than the first preset temperature; and controlling the compressor to operate at the second operating frequency.

First claim

What is claimed is:

1. A method for adjusting a frequency of a compressor, comprising:
determining a first operating frequency based on an ambient temperature;
operating the compressor at the first operating frequency;
acquiring a first exhaust temperature of the compressor operating at the first operating frequency; and
in accordance with a determination that the first exhaust temperature is equal to or greater than a first preset temperature:
controlling the compressor to perform frequency reduction processing to reduce the first operating frequency to a second operating frequency, and making a second exhaust temperature of the compressor operating at the second operating frequency be lower than the first preset temperature, wherein controlling the compressor to perform frequency reduction processing to reduce the first operating frequency to a second operating frequency comprises controlling the compressor to operate at the second operating frequency, and wherein the first preset temperature is associated with a maximum exhaust temperature of the compressor, the compressor is a compressor of a heat exchange assembly of a heat exchange device, wherein the heat exchange assembly further comprises an evaporator and a condenser, the heat exchange assembly is arranged inside a housing of the heat exchange device, and the method includes:

in accordance with a determination that the first exhaust temperature of the compressor reaches the maximum exhaust temperature of the compressor, sounding an alarm or shutting down the compressor.

2. The method of claim 1 , wherein
the first operating frequency is controlled to reduce to the second operating frequency by a first preset frequency difference over one or more times of frequency reduction.

3. The method of claim 2 , wherein the first preset frequency difference increases as a number of times of frequency reduction increases.

4. The method of claim 1 , further comprising:
in accordance with a determination that the second exhaust temperature of the compressor operating at the second operating frequency is less than a second preset temperature:
controlling the compressor to perform frequency increase processing to increase the second operating frequency to a third operating frequency, and making a third exhaust temperature of the compressor operating at the third operating frequency be greater than a second preset temperature; and
controlling the compressor to operate at the third operating frequency.

5. The method of claim 4 , wherein in the controlling the compressor to perform frequency reduction processing, the first operating frequency is controlled to reduce to the second operating frequency by a first preset frequency difference over one or more times of frequency reduction; and
before determining that the second exhaust temperature is less than the second preset temperature,
determining the second preset temperature, wherein the second preset temperature is determined based on a number of times of frequency reduction being less than a first preset value, or based on a temperature difference between the second preset temperature and the first preset temperature being less than or equal to a preset temperature difference.

6. The method of claim 5 , wherein the first preset value is an integer less than or equal to 3.

7. The method of claim 4 , wherein
the second operating frequency is increased to a third operating frequency by a second preset frequency difference over one or more times of frequency increase.

8. The method of claim 7 , wherein
the second operating frequency is increased to the third operating frequency by the second preset frequency difference over one or more times of frequency increase, and
the second preset frequency difference and a number of times of frequency increase are determined based on a temperature difference between the second preset temperature and the first preset temperature.

9. The method of claim 1 , further comprising:
before acquiring a first exhaust temperature of the compressor operating at a first operating frequency,
determining the first operating frequency of the compressor based on an ambient temperature.

10. The method of claim 9 , wherein determining the first operating frequency of the compressor based on an ambient temperature comprises:
in accordance with a determination that the ambient temperature is less than or equal to a first temperature, determining a first frequency as the first operating frequency; and
in accordance with a determination that the ambient temperature is greater than the first temperature, determining a second frequency as the first operating frequency,
wherein the second frequency is lower than the first frequency.

11. A heat exchange device, comprising:
a heat exchange assembly, including a compressor, a condenser and an evaporator connected to form a heat exchange cycle; and
a controller, used to control the compressor to perform a method for adjusting a frequency of the compressor, including:
determining a first operating frequency based on an ambient temperature;
operating the compressor at the first operating frequency;
acquiring a first exhaust temperature of the compressor operating at the first operating frequency; and
in accordance with a determination that the first exhaust temperature is equal to or greater than a first preset temperature:
controlling the compressor to perform frequency reduction processing to reduce the first operating frequency to a second operating frequency, and making a second exhaust temperature of the compressor operating at the second operating frequency be lower than the first preset temperature, wherein controlling the compressor to perform frequency reduction processing to reduce the first operating frequency to a second operating frequency comprises controlling the compressor to operate at the second operating frequency, and wherein the first preset temperature is associated with a maximum exhaust temperature of the compressor, the heat exchange assembly is arranged inside a housing of a heat exchange device, and the method includes:

in accordance with a determination that the first exhaust temperature of the compressor reaches the maximum exhaust temperature of the compressor, sounding an alarm or shutting down the compressor.

12. The heat exchange device of claim 11 , wherein the compressor is wrapped with a noise reduction layer.

13. The heat exchange device of claim 11 , further comprising a housing, wherein the heat exchange assembly is arranged inside the housing, and no fan for cooling the compressor is arranged inside the housing.

14. The heat exchange device of claim 11 , wherein the heat exchange device is a clothes dryer or an integrated washer dryer.

Assignees

• Guangdong Midea White Home Appliance Tech Innovation Center Co Ltd
• Midea Group Co Ltd

Inventors

• Gao Keke
• Tang Qixiong
• Zhang Su
• Gong Chun
• Zhao Jiaqiang

Classifications

• D06F2103/50

  related to heat pumps, e.g. pressure or flow rate · CPC title

• F25B2700/21152

  at the discharge side of the compressor · CPC title

• F25B2700/2115

  of a compressor or the drive means therefor · CPC title

• F25B2600/0253

  with variable speed · CPC title

• F25B2500/29

  High ambient temperatures · CPC title