Intelligent control method for air direction of air conditioner

Abstract

The invention discloses an intelligent control method for the air direction of an air conditioner, and belongs to the technical field of air conditioners, a controller is arranged in the air conditioner, a first ultrasonic ranging sensor and a second ultrasonic ranging sensor are arranged on a front panel of the air conditioner, and the two ultrasonic ranging sensors are both electrically connected with the controller; a two-dimensional coordinate system (x, y) is established, the x axis is in the left-right direction, the y axis is in the front-back direction, the front direction of the original point is the positive half axis of the y axis, the coordinate of the first ultrasonic distance measuring sensor is (0, 0), and the coordinate of the second ultrasonic distance measuring sensor is (a, 0); distances d1 and d2 from the two ultrasonic distance measuring sensors to a user in front of the air conditioner are measured respectively, user coordinates (x1, y1) are calculated, a user deviation angle theta is calculated, then an air guide plate of the air conditioner is controlled to rotate leftwards and rightwards to a proper position, and a direct blowing mode or a human avoiding mode is achieved. The method is accurate in user positioning and free of external environment interference, and compared with a traditional air conditioner, the comfort degree is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and more particularly to an intelligent control method for the air outlet direction of an air conditioner. Background Art

[0002] The air outlet direction of a traditional air conditioner can be set to direct air outlet or swing left and right cyclically. However, users move around in the room, and the air outlet direction cannot be adjusted in real time to achieve a direct blowing mode or an anti-person mode. Currently, to address this problem, there is an air conditioner on the market whose air outlet direction can be adjusted in real time according to the user's position. The positioning technology it uses is through a camera or an infrared sensor. The problem with the camera is that it is easy to leak user privacy, and the problem with the infrared sensor is that it is easily interfered by ambient light and the positioning is inaccurate. In view of this, it is necessary to improve the existing technology. Summary of the Invention

[0003] The purpose of the present invention is to provide an intelligent control method for the air outlet direction of an air conditioner, aiming to at least solve one of the technical problems existing in the above-mentioned prior art. To achieve the above purpose, the technical solution it adopts is as follows:

[0004] An intelligent control method for the air outlet direction of an air conditioner, wherein a controller is provided inside the air conditioner, and a first ultrasonic ranging sensor and a second ultrasonic ranging sensor are arranged at intervals along the left-right direction on the front panel of the air conditioner. Both ultrasonic ranging sensors are electrically connected to the controller;

[0005] A two-dimensional coordinate system (x, y) is established, where the x-axis is along the left-right direction, the y-axis is along the front-back direction, and the positive half-axis of the y-axis is forward from the origin. Among them, the coordinate of the first ultrasonic ranging sensor is (0, 0), and the coordinate of the second ultrasonic ranging sensor is (a, 0);

[0006] Measure the distance d1 between the first ultrasonic ranging sensor and the user in front of the air conditioner, where d1 = (Δt1 × speed of sound) / 2, and Δt1 is the time from when the first ultrasonic ranging sensor emits a sound wave, returns through the user, and then receives the sound wave;

[0007] Measure the distance d2 between the second ultrasonic ranging sensor and the user in front of the air conditioner, where d2 = (Δt2 × speed of sound) / 2, and Δt2 is the time from when the second ultrasonic ranging sensor emits a sound wave, returns through the user, and then receives the sound wave;

[0008] Calculate the user coordinates (x1, y1), where y1 > 0, using the following formula:

[0009]

[0010] Calculate the user offset angle θ, where θ is the angle between the positive half-axis of the y-axis and the line connecting the origin to the user coordinates, using the following formula:

[0011]

[0012] According to the user coordinates (x1, y1) and the offset angle θ, control the left - right rotation of the air - conditioner air deflector to a suitable position to achieve the direct - blowing mode or the person - avoiding mode.

[0013] Preferably, the positive half - axis of the x - axis is to the right of the origin.

[0014] Preferably, the distance between the two ultrasonic ranging sensors is 20 cm.

[0015] Preferably, the coordinates of the second ultrasonic ranging sensor are (20, 0).

[0016] Preferably, recalculate the user coordinates (x1, y1) and the user offset angle θ every 0.5 - 3 s and adjust the angle of the air deflector.

[0017] Preferably, in the direct - blowing mode, the air - outlet direction of the air conditioner is consistent with the direction of the line connecting the origin and the user coordinates.

[0018] Preferably, in the person - avoiding mode, the air - outlet direction of the air conditioner is 10° - 15° to the left or right of the direction of the line connecting the origin and the user coordinates.

[0019] Preferably, the speed of sound is 340 m / s.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The intelligent air - direction control method for an air conditioner of the present invention has accurate user positioning, is not affected by the external environment, and greatly improves the comfort compared with traditional air conditioners. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is a schematic diagram of the front - panel structure of the air conditioner of the present invention.

[0024] Figure 2 It is a schematic diagram of the two - dimensional coordinate system (x, y) of the present invention. [[ID= forty - five]]

[0025] In the figure: 1. The first ultrasonic ranging sensor; 2. The second ultrasonic ranging sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", and "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] As Figures 1 to 2 shown, a preferred embodiment of the present invention provides an intelligent air-conditioning air direction control method. A controller is provided in the air conditioner. The front panel of the air conditioner is provided with a first ultrasonic ranging sensor 1 and a second ultrasonic ranging sensor 2. The two ultrasonic ranging sensors are arranged at intervals along the left-right direction, and the interval distance is 20 cm. Both ultrasonic ranging sensors are electrically connected to the controller. The function of the ultrasonic ranging sensor is to measure the straight-line distance between the ultrasonic ranging sensor and the user in front of the air conditioner through cooperation with the controller.

[0029] The control method includes the following steps: Establish a two-dimensional coordinate system (x, y), where the x-axis is along the left-right direction, the y-axis is along the front-back direction, the positive half-axis of the x-axis is to the right of the origin, and the positive half-axis of the y-axis is forward. The coordinate of the first ultrasonic ranging sensor 1 is (0, 0), that is, the coordinate origin. The second ultrasonic ranging sensor 2 is located on the right side of the first ultrasonic ranging sensor 1, and the coordinate is (a, 0), that is, the coordinate (20, 0).

[0030] Measure the distance d1 between the first ultrasonic ranging sensor 1 and the user in front of the air conditioner. The specific method is that the first ultrasonic ranging sensor 1 reflects sound waves forward and simultaneously sends out an ultrasonic wave signal to the controller. The controller records the ultrasonic wave emission time as t0. The sound wave returns after hitting the human body, and the first ultrasonic ranging sensor 1 receives the sound wave and simultaneously sends out a received ultrasonic wave signal to the controller. The controller records the ultrasonic wave reception time as t1. Then the time Δt1 required for the sound wave to be emitted, return after hitting the human body, and then be received is Δt1 = t1 - t0. Among them, the speed of sound is 340 m / s, then d1 = (Δt1 × speed of sound) / 2.

[0031] Use the same method as above to measure the distance d2 between the second ultrasonic ranging sensor 2 and the user in front of the air conditioner, d2 = (Δt2 × speed of sound) / 2, where Δt2 is the time from the emission of the ultrasonic wave by the second ultrasonic ranging sensor 2, returning after hitting the user, and then being received.

[0032] According to the above, for d1 and d2, calculate the user coordinates (x1, y1) in the two-dimensional coordinate system (x, y), where y1 > 0, using the following formula:

[0033]

[0034] Arrange the coordinates (20, 0) of the second ultrasonic ranging sensor 2 to obtain:

[0035]

[0036] Calculate the user offset angle θ, where θ is the angle between the positive half-axis of the y-axis and the line connecting the origin to the user coordinates, as Figure 2 shown, using the following formula:

[0037]

[0038] In the direct blowing mode of the air conditioner, the air outlet direction of the air conditioner is the same as the direction of the line connecting the origin to the user coordinates. Specifically, when x1 < 0, it means that the human body is on the left side of the first ultrasonic ranging sensor 1, and the air conditioner air deflector is controlled to rotate θ degrees to the left starting from the positive half-axis of the y-axis. When x1 = 0, it means that the human body is directly in front of the first ultrasonic ranging sensor 1, and the air conditioner air deflector is controlled to rotate to the positive half-axis direction of the y-axis. When x1 > 0, it means that the human body is on the right side of the first ultrasonic ranging sensor 1, and the air conditioner air deflector is controlled to rotate θ degrees to the right starting from the positive half-axis of the y-axis.

[0039] In the human body avoidance mode of the air conditioner, the air outlet direction of the air conditioner is 10° - 15° to the left or right of the direction of the line connecting the origin to the user coordinates. In this embodiment, it is preferably 10°. Specifically, when x1 < 0, it means that the human body is on the left side of the first ultrasonic ranging sensor 1, and the air conditioner air deflector is controlled to rotate θ degrees to the left starting from the positive half-axis of the y-axis, and then rotate 10° to the left or right. When x1 = 0, it means that the human body is directly in front of the first ultrasonic ranging sensor 1, and the air conditioner air deflector is controlled to rotate to the positive half-axis direction of the y-axis, and then rotate 10° to the left or right. When x1 > 0, it means that the human body is on the right side of the first ultrasonic ranging sensor 1, and the air conditioner air deflector is controlled to rotate θ degrees to the right starting from the positive half-axis of the y-axis, and then rotate 10° to the left or right.

[0040] The system recalculates the user coordinates (x1, y1) and the user offset angle θ every 0.5 - 3 s, and adjusts the angle of the air deflector according to the above method.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An intelligent control method for the air direction of an air conditioner, characterized in that, A controller is provided inside the air conditioner. The front panel of the air conditioner is provided with a first ultrasonic ranging sensor and a second ultrasonic ranging sensor at intervals in the left - right direction. Both ultrasonic ranging sensors are electrically connected to the controller; A two - dimensional coordinate system (x, y) is established, where the x - axis is along the left - right direction, the y - axis is along the front - back direction, and the positive semi - axis of the y - axis is forward from the origin. Among them, the coordinate of the first ultrasonic ranging sensor is (0, 0), and the coordinate of the second ultrasonic ranging sensor is (a, 0); Measure the distance d1 between the first ultrasonic ranging sensor and the user in front of the air conditioner as d1=(Δt1×speed of sound) / 2, where Δt1 is the time from when the first ultrasonic ranging sensor emits a sound wave, reflects off the user, and then is received back; Measure the distance d2 between the second ultrasonic ranging sensor and the user in front of the air conditioner as d2=(Δt2×speed of sound) / 2, where Δt2 is the time from when the second ultrasonic ranging sensor emits a sound wave, reflects off the user, and then is received back; Calculate the user coordinates (x1, y1), where y1>0, using the following formula: Calculate the user offset angle θ, where θ is the angle between the positive semi - axis of the y - axis and the line connecting the origin to the user coordinates, using the following formula: According to the user coordinates (x1, y1) and the offset angle θ, control the left - right rotation of the air conditioner air deflector to a suitable position to achieve the direct - blowing mode or the person - avoiding mode.

2. The intelligent air-conditioning wind direction control method according to claim 1, characterized in that The positive semi - axis of the x - axis is to the right of the origin.

3. The intelligent air-conditioning air direction control method according to claim 2, wherein, The interval distance between the two ultrasonic ranging sensors is 20 cm.

4. The intelligent air-conditioning air direction control method according to claim 3, wherein The coordinate of the second ultrasonic ranging sensor is (20, 0).

5. The intelligent air-conditioning air direction control method according to claim 1, characterized in that, Recalculate the user coordinates (x1, y1) and the user offset angle θ every 0.5 - 3 s, and adjust the angle of the air deflector.

6. The intelligent air-conditioning air direction control method according to claim 1, characterized in that In the direct - blowing mode, the air - outlet direction of the air conditioner is the same as the direction of the line connecting the origin to the user coordinates.

7. A method for intelligent control of the air conditioning air direction according to claim 1, characterized in that, In the person - avoiding mode, the air - outlet direction of the air conditioner is 10° - 15° to the left or right of the direction of the line connecting the origin to the user coordinates.

8. A method for intelligent control of the air-conditioning air direction according to claim 1, characterized in that, The speed of sound is 340 m / s.

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