Air conditioner and method for controlling same based on indoor space image including relative positions of walls, ceiling, and floor

Patent metadata

Field	Value
Publication number	US-2025369642-A1
Application number	US-202519297668-A
Country	US
Kind code	A1
Filing date	Aug 12, 2025
Priority date	Dec 23, 2019
Publication date	Dec 4, 2025
Grant date	—

Abstract

Provided are an air conditioner and a control method thereof. The air conditioner may include a wind direction controller that changes the direction of air being discharged, an air volume controller that changes the amount of air being discharged, a camera that obtains an image of indoor space and provides an indoor space image, and a control unit that controls the wind direction controller and the air volume controller, wherein the control unit finds indoor space information based on the indoor space image, and controls at least one of the wind direction controller and the air volume controller based on the indoor space information.

First claim

1 . A control method of an air conditioner, comprising:
obtaining an indoor space image of an indoor space; obtaining an indoor structure image identifying interwall boundaries, based on the indoor space image; estimating a surface area of a floor of the indoor space based on the indoor structure image; setting a basic wind direction based on the indoor structure image; setting a basic air volume based on the surface area of the floor of the indoor space; and operating the air conditioner based on the basic wind direction and the basic air volume, wherein the setting of the basic air volume includes:
calculating a difference between the surface area of the floor of the indoor space and a reference surface area for use of the air conditioner;
setting the basic air volume to be a first predetermined air volume when the difference is a first set value or greater;
setting the basic air volume to be a second predetermined air volume that is less than the first predetermined air volume when the difference is less than the first set value and is greater than or equal to a second set value that is less than the first set value; and
setting the basic air volume to be a third predetermined air volume that is less than the second predetermined air volume when the difference is less than the second set value.

2 . The control method of claim 1 , wherein the estimating of the surface area of the floor of the indoor space includes:
dividing the indoor structure image into cells of a predetermined size; and estimating the surface area of the floor of the indoor space based on the divided indoor structure image and a height of the indoor space.

3 . The control method of claim 2 , further comprising receiving the height of the indoor space from a user before estimating the surface area of the floor of the indoor space.

4 . The control method of claim 1 , wherein the setting of the basic wind direction includes:
determining a shortest interwall boundary among the interwall boundaries included in the indoor structure image; and setting a direction of the shortest interwall boundary as the basic wind direction.

5 . The control method of claim 1 , further comprising:
determining a first boundary and a second boundary among the interwall boundaries, included in the indoor structure image when an instruction to rotate a wind direction is received from a user; and operating the air conditioner to change the wind direction between the first boundary and the second boundary.

6 . The control method of claim 5 , wherein the operating of the air conditioner to change the wind direction between the first boundary and the second boundary includes:
calculating a distance between one of the interwall boundaries included in the indoor structure image and the air conditioner; and operating the air conditioner to change an air volume based on the calculated distance while changing the wind direction between the first boundary and the second boundary.

7 . The control method of claim 1 , further comprising:
determining initial load elements included in the indoor space image after setting of the basic air volume; calculating a total number of the initial load elements, and adjusting the basic air volume based on the total number of the initial load elements.

8 . The control method of claim 7 , further comprising:
obtaining another indoor space image during operation of the air conditioner; calculating a total number of load elements included in the other indoor space image photographed during operation of the air conditioner; comparing the total number of the load elements with the total number of the initial load elements; and adjusting the basic air volume based on the comparing of the total number of the load elements with the total number of the initial load elements.

9 . The control method of claim 1 , wherein the indoor space image is obtained by a camera.

Assignees

• Lg Electronics Inc

Inventors

• Han Dongwoo
• Chae Yeon Kyung
• Song Taeyup

Classifications

• G05B2219/2614

  HVAC, heating, ventillation, climate control · CPC title

• G05B19/042

  using digital processors (G05B19/05 takes precedence) · CPC title

• G06T7/12

  Edge-based segmentation · CPC title

• F24F2110/10

  Temperature · CPC title

• F24F2130/00

  Control inputs relating to environmental factors not covered by group F24F2110/00 · CPC title