Duct-type air conditioning system, and control method and device for indoor ventilator thereof

Patent metadata

Field	Value
Publication number	US-10914481-B2
Application number	US-201716469644-A
Country	US
Kind code	B2
Filing date	May 12, 2017
Priority date	Jan 5, 2017
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A duct-type air conditioning system, a control method and a device for an indoor ventilator thereof. The control method comprises the following steps: upon turning on the duct-type air conditioning system, acquiring an indoor temperature and a set temperature recorded the last time the duct-type air conditioning system was turned off, and acquiring a present set temperature (S1) according to the indoor temperature and the set temperature recorded the last time the system was turned off; detecting a real-time indoor temperature, according to the present indoor temperature and the present set temperature, calculating a temperature difference between the present indoor temperature and the set temperature, and generating an air velocity adjustment instruction according to the temperature difference, controlling, according to the air velocity adjustment instruction, the indoor ventilator to adjust the air supply velocity (S4) of an indoor unit.

First claim

What is claimed is:

1. A method for controlling an indoor fan of a duct-type air conditioning system, comprising:
when the duct-type air conditioning system starts up, obtaining an indoor temperature value and a set temperature value recorded at a previous shutdown of the duct-type air conditioning system; and
obtaining a present set temperature value according to the indoor temperature value and the set temperature value recorded at the previous shutdown of the duct-type air conditioning system;
correcting the present set temperature value according to a relationship between the present indoor temperature value when the system starts up and the present set temperature value;
detecting, in real time, a present indoor temperature value;
calculating a temperature difference between the present indoor temperature value and the corrected present set temperature value;
generating an instruction for adjusting a wind speed according to the temperature difference; and
controlling the indoor fan according to the instruction for adjusting the wind speed, to adjust an outlet air volume of the indoor unit.

2. The method of claim 1 , wherein, correcting the present set temperature value according to the relationship between the present indoor temperature value when the system starts up and the present set temperature value, comprises:
when the system operates in a refrigeration mode, setting the present set temperature value to be a difference between the present indoor temperature value when the system starts up and a second temperature threshold in response to the present set temperature value being greater than or equals to a difference between the present indoor temperature value when the system starts up and a first temperature threshold; and
when the system operates in a heating mode, setting the present set temperature value to be a sum of the present indoor temperature value when the system starts up and the second temperature threshold in response to the present set temperature value being lower than or equals to a sum of the present indoor temperature value when the system starts up and the first temperature threshold.

3. The method of claim 1 , further comprising: during the system operates, obtaining the temperature difference in real time, and correcting the present set temperature value according to a present temperature difference and a temperature difference before the system continuously operates for a preset x minutes.

4. The method of claim 3 , wherein, correcting the present set temperature value according to the present temperature difference and the temperature difference before the system continuously operates for the preset x minutes, comprises:
when the system operates in a refrigeration mode, correcting the present set temperature value by reducing a third temperature threshold from the present set temperature value in response to the present temperature difference being greater than the temperature difference before the system continuously operates for the preset x minutes; and
when the system operates in a heating mode, correcting the present set temperature value by adding the third temperature threshold to the present set temperature value in response to the present temperature difference being greater than the temperature difference before the system continuously operates for the preset x minutes.

5. The method of claim 1 , wherein, when the system starts up first, a preset original set temperature value is taken as the present set temperature value.

6. A device for controlling an indoor fan of a duct-type air conditioning system, comprising:
an obtaining device configured to when the duct-type air conditioning system starts up, obtain an indoor temperature value and a set temperature value recorded at a previous shutdown of the duct-type air conditioning system, and obtain a present set temperature value according to the indoor temperature value and the set temperature value recorded at the previous shutdown of the duct-type air conditioning system;
a first correction module, configured to, correct the present set temperature value according to a relationship between the present indoor temperature value when the system starts up and the present set temperature value;
a temperature detecting device configured to detect, in real time, a present indoor temperature value; and
a control device configured to calculate a temperature difference between the present indoor temperature value and the corrected present set temperature value, generate an instruction for adjusting a wind speed according to the temperature difference, and control the indoor fan according to the instruction for adjusting the wind speed, to adjust an outlet air volume of the indoor unit.

7. The device of claim 6 , wherein, the first correction module is configured to correct the present set temperature value according to the relationship between the present indoor temperature value when the system starts up and the present set temperature value, in which,
when the system operates in a refrigeration mode, the present set temperature value is set to be a difference between the present indoor temperature value when the system starts up and a second temperature threshold in response to the present set temperature value being greater than or equals to a difference between the present indoor temperature value when the system starts up and a first temperature threshold; and
when the system operates in a heating mode, the present set temperature value is set to be a sum of the present indoor temperature value when the system starts up and the second temperature threshold in response to the present set temperature value being lower than or equals to a sum of the present indoor temperature value when the system starts up and the first temperature threshold.

8. The device of claim 6 , wherein, the obtaining module is further configured to, during the system operates, obtain the temperature difference in real time, and the device further comprises a second correction module, configured to, correct the present set temperature value according to a present temperature difference and a temperature difference before the system continuously operates for a preset x minutes.

9. The device of claim 8 , wherein, the second correction module is configured to correct the present set temperature value according to the present temperature difference and the temperature difference before the system continuously operates for the preset x minutes, in which,
when the system operates in a refrigeration mode, the second correction module is configured to correct the present set temperature value by reducing a third temperature threshold from the present set temperature value in response to the present temperature difference being greater than the present temperature difference before the system continuously operates for the preset x minutes; and
when the system operates in a heating mode, the second correction module is configured to correct the present set temperature value by adding the third temperature threshold to the present set temperature value in response to the present temperature difference being greater than the temperature difference before the system continuously operates for the preset x minutes.

10. The device of claim 6 , wherein, the obtaining module is configured to, when the system starts up first, take a preset original set temperature value as the present set temperature value.

11. A duct-type air conditioning system, comprising: the device for controlling the indoor fan of the duct-type air conditioning system of claim 6 .

12. A non-temporary computer readable storage medium having computer

Assignees

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

Inventors

• Wei Fudang
• Song Ming
• Mo Yiyang
• Luo Geng

Classifications

• F24F2110/12

  of the outside air · CPC title

• F24F11/64

  using pre-stored data · CPC title

• F24F2110/10

  Temperature · CPC title

• G05B2219/2614

  HVAC, heating, ventillation, climate control · CPC title

• F24F11/62 Primary

  characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values · CPC title