Air conditioner controlling method and apparatus and air conditioner having the same

Patent metadata

Field	Value
Publication number	US-11333379-B2
Application number	US-201916620143-A
Country	US
Kind code	B2
Filing date	Jun 3, 2019
Priority date	Jun 12, 2018
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

The present disclosure discloses an air conditioner controlling method and apparatus, as well as an air conditioner having the same. The method includes: determining that an outdoor heat exchanger of the air conditioner runs in an evaporator state; acquiring a state signal of a refrigerant of an indoor refrigerating unit; and adjusting an opening degree of an electronic expansion valve of an outdoor unit according to the state signal of the indoor refrigerating unit. This method may adjust the opening degree of the electronic expansion valve of the outdoor unit according to the state signal of the indoor refrigerating unit when the outdoor heat exchanger of the air conditioner runs in the evaporator state, thereby effectively improving the reliability of control, broadening the reliable operation range of the system, and reasonably distributing the refrigerant between the indoor refrigerating unit and the outdoor unit under a low temperature working condition.

First claim

What is claimed is:

1. An air conditioner controlling method, wherein the air conditioner runs in a low temperature hybrid mode, and the method comprises:
determining that an outdoor heat exchanger of the air conditioner runs in an evaporator state;
acquiring a state signal of a refrigerant of an indoor refrigerating unit,
wherein the acquiring a state signal of a refrigerant of an indoor refrigerating unit comprises:
acquiring a state parameter for identifying a state of the refrigerant; and
controlling the indoor refrigerating unit to transmit the state signal according to the state parameter,
wherein the state parameter at least comprises an air supply temperature of the air conditioner; and
adjusting an opening degree of an electronic expansion valve of an outdoor unit according to the state signal of the indoor refrigerating unit,
wherein the adjusting an opening degree of an electronic expansion valve of an outdoor unit according to the state signal of the indoor refrigerating unit comprises:
acquiring a first proportion, relative to all indoor refrigerating units, of an indoor refrigerating unit which transmits a first state signal indicating insufficient refrigerant;
detecting and confirming that a first duration during which the first proportion is greater than a preset first proportion threshold exceeds a preset first duration;
detecting and confirming that a second duration during which all indoor refrigerating units transmit a second state signal indicating excessive refrigerant exceeds a preset second duration; and
controlling the opening degree of the electronic expansion valve of the outdoor unit to be reduced.

2. The air conditioner controlling method according to claim 1 , further comprising:
acquiring a second proportion, relative to all indoor refrigerating units, of an indoor refrigerating unit which transmits a third state signal indicating excessive refrigerant, when it is detected and confirmed that the followings are not met at the same time:
the first duration during which the first proportion is greater than the preset first proportion threshold exceeds the preset first duration, and
the second duration during which all indoor refrigerating units transmit the second state signal exceeds the preset second duration;
detecting and confirming that a third duration during which the second proportion is greater than a preset second proportion threshold exceeds a preset third duration;
detecting and confirming that a fourth duration during which all indoor refrigerating units transmit a fourth state signal indicating insufficient refrigerant exceeds a preset fourth duration;
detecting and confirming that an exhaust superheat degree of the air conditioner is greater than a preset superheat threshold; and
controlling the opening degree of the electronic expansion valve of the outdoor unit to be increased.

3. The air conditioner controlling method according to claim 2 , further comprising:
controlling a current opening degree of the electronic expansion valve of the outdoor unit to be maintained, when it is detected and confirmed that the followings are not met at the same time:
the third duration during which the second proportion is greater than the preset second proportion threshold exceeds the preset third duration,
the fourth duration exceeds the preset fourth duration, and
the exhaust superheat degree is greater than the preset superheat threshold.

4. The air conditioner controlling method according to claim 1 , wherein the controlling the indoor refrigerating unit to transmit the state signal according to the state parameter comprises:
matching the state parameter with each of at least one preset state identifying strategy; and
controlling the indoor refrigerating unit to transmit the state signal according to a match result of matching the state parameter with each state identifying strategy.

5. The air conditioner controlling method according to claim 4 , further comprising:
detecting and confirming that a first state signal is triggered under a first preset state identifying strategy, and that a duration of the first state signal exceeds a preset fifth duration;
controlling a current target superheat degree to be reduced when it is detected and confirmed that the duration of the first state signal exceeds the preset fifth duration until a fourth state signal is triggered by the first preset state identifying strategy or the first state signal is triggered by a second preset state identifying strategy;
detecting and confirming that a second state signal is triggered under a third preset state identifying strategy, and that a duration of the second state signal exceeds a preset sixth duration; and
controlling the current target superheat degree to be increased when it is detected and confirmed that the duration of the second state signal exceeds the preset sixth duration until a third state signal is triggered by the third preset state identifying strategy or the second state signal is triggered by a fourth preset state identifying strategy.

6. The air conditioner controlling method according to claim 5 , further comprising:
identifying that the state parameter is matched with each of the at least one preset state identifying strategy;
detecting and confirming that the state parameter is matched with both of the first preset state identifying strategy and the second preset state identifying strategy for triggering the first state signal, acquiring priority levels of the first preset state identifying strategy and the second preset state identifying strategy, and controlling a first state signal triggered by a state identifying strategy with a higher priority level to be transmitted;
detecting and confirming that the state parameter is matched with both of the third preset state identifying strategy and the fourth preset state identifying strategy for triggering the third state signal, acquiring priority levels of the third preset state identifying strategy and the fourth preset state identifying strategy, and controlling a third state signal triggered by a state identifying strategy with a higher priority level to be transmitted,
wherein the first preset state identifying strategy and the second preset state identifying strategy are state identifying strategies for identifying a refrigerant insufficient state, and
the third preset state identifying strategy and the fourth preset state identifying strategy are state identifying strategies for identifying a refrigerant excessive state.

7. The air conditioner controlling method according to claim 1 , further comprising:
acquiring an entry temperature of the refrigerant;
controlling to start an indoor unit anti-freezing process when it is detected and confirmed that the entry temperature is less than or equal to a first preset temperature threshold and the state signal is not a refrigerant excessive state signal;
continuously detecting the entry temperature, and controlling to stop the indoor unit anti-freezing process when it is detected and confirmed that the entry temperature is greater than or equal to a second preset temperature threshold or the state signal is a refrigerant insufficient state signal,
wherein the refrigerant excessive state signal comprises the second state signal and the third state signal, and the refrigerant insufficient state signal comprises the first state signal and the fourth state signal.

8. The air conditioner controlling method according to claim 1 , further comprising:
collecting sample data, and training a predicting model constructed for predicting the air supply temperature with the sample data to obtain a target predicting model; and
collecting prediction data for predicting the air supply temperatu

Assignees

• Hefei Midea Heating & Ventilating Equipment Co Ltd
• Gd Midea Heating & Ventilating Equipment Co Ltd

Inventors

• Zheng Chunyuan
• Tan Zhijun
• Yang Kun
• Wang Mingren

Classifications

• F24F11/84

  using valves · CPC title

• F24F11/64 Primary

  using pre-stored data · CPC title

• G05B13/048

  using a predictor · CPC title

• F24F11/65

  for selecting an operating mode · CPC title

• F24F2140/00

  Control inputs relating to system states · CPC title