Control method of range hood and range hood

Abstract

A control method of a range hood and the range hood, wherein the method at least acquires a distance between a user and the range hood determined by a detection device; when it is determined that the distance is not greater than a first preset value, the range hood is controlled to move upward from a current position to a first position of the range hood. According to the distance between the user and the range hood acquired directly or indirectly, the range hood is controlled to move to a corresponding safe position, which avoids collision between the user and the range hood, and also realizes automatic lifting of the range hood, reduces complexity of the user in adjusting the height of the range hood, and meets different use requirements of the user.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to an oil fume extractor and a control method of the oil fume extractor. BACKGROUND

[0002] For most people, the oil fume extractor is an indispensable appliance in daily life, which can easily solve the problem of oil fume generated during cooking. In order to improve the efficiency of the oil fume extractor, there are solutions to improve the solution of the oil fume problem by enhancing the working strength of the fan. In addition, there are also solutions to enhance the smoke exhaust effect by adjusting the height of the oil fume extractor to prevent the escape of oil fume.

[0003] The current solution still has some problems. On the one hand, the height of the oil fume extractor needs to be manually adjusted, which is not intelligent enough. On the other hand, if the height of the oil fume extractor is lowered to improve the oil fume extraction rate, the user's head is easy to collide with the oil fume extractor when the height of the oil fume extractor is too low; if the height of the oil fume extractor is raised to prevent collision, the oil fume extraction rate is reduced. SUMMARY

[0004] One of the purposes of the embodiments of the present application is to provide a method for automatically controlling the lifting of the oil fume extractor and an oil fume extractor that can be automatically lifted.

[0005] One of the purposes of the embodiments of the present application is to provide a liftable oil fume extractor and a control method thereof that can be applied to different user heights or different states of the same user, so as to avoid the collision problem between the user and the oil fume extractor.

[0006] One of the purposes of the embodiments of the present application is also to provide a control method and a corresponding oil fume extractor that can both avoid the collision between the user and the oil fume extractor and improve the oil fume extraction rate of the oil fume extractor.

[0007] One of the purposes of the embodiments of the present application also includes a control method and a corresponding oil fume extractor that can lift the oil fume extractor according to the distance between the user and the oil fume extractor or the moving speed of the user.

[0008] The present application provides a control method of an oil fume extractor, comprising: acquiring at least the distance d between the user and the oil fume extractor determined by a detection device; when it is determined that the distance is not greater than a first preset value, controlling the oil fume extractor to move upward from the current position to a first position of the oil fume extractor. In this way, the oil fume extractor can be automatically lifted by judging the distance between the user and the oil fume extractor, so as to avoid the collision between the user and the oil fume extractor; and the lifting distance of the oil fume extractor can be more accurately controlled, and the complexity of manually adjusting the height of the oil fume extractor by the user is reduced.

[0009] In a possible embodiment, the method further comprises: acquiring a first speed of the user relative to the range hood; and controlling the range hood to move upward from a current position to a first position of the range hood when it is determined that the first speed is greater than zero. By taking the distance between the user and the range hood and the first speed as the trigger condition for the movement of the range hood, the timing and distance of the movement of the range hood can be controlled more accurately, and the user can be prevented from colliding with the range hood.

[0010] In a possible embodiment, the first position can be determined according to the distance between the user and the range hood, so that the distance between the user and the range hood is not less than a second preset value.

[0011] In a possible embodiment, the range hood can also be controlled to move up and down, so that the minimum distance between the user and the range hood when the range hood reaches the first position is equal to the second preset value, and the range hood is kept at the first position.

[0012] In the above, the safety distance is adjusted by considering the height of different users and different states of the same user, so as to adapt to different needs, and the control method is more intelligent.

[0013] In a possible embodiment, the method further comprises: after the range hood stays at the first position for a preset time, the detection device detects the distance between the user and the range hood and a first speed of the user relative to the range hood again; and the range hood is controlled to move downward from the first position to a second position when the distance is greater than a third preset value or the first speed is less than zero. By judging whether the user is away from the range hood, the range hood is controlled to move down to a certain position, so that the user is prevented from colliding with the range hood, the oil smoke suction rate is improved, and the control is more intelligent.

[0014] A range hood comprises a control device, a detection device, and a movement driving device; the detection device is configured to determine the distance between the user and the range hood; and the control device is configured to control the movement of the range hood according to the control method, wherein the movement of the range hood is realized by the movement driving device.

[0015] Compared with the prior art, the above scheme reduces the complexity of the user adjusting the height of the range hood, meets the needs of the user diversity, improves the accuracy of controlling the range hood to move up and down, improves the user's cooking experience, and greatly facilitates the user. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a range hood in an embodiment of the present application;

[0017] Figure 2 FIG. 2 is a structural block diagram of a range hood in an embodiment of the present application;

[0018] Figure 3is a method flow chart in an embodiment of the present application;

[0019] Figure 4 is a schematic diagram of the distance between a user and the range hood in an embodiment of the present application;

[0020] Figure 5 is a schematic diagram of the relationship between a first position and distance d in an embodiment of the present application;

[0021] Figure 6 is another schematic diagram of the relationship between a first position and distance d in an embodiment of the present application. DETAILED DESCRIPTION

[0022] As Figure 1 and Figure 2 disclose a range hood 10, which includes a smoke collecting cover 200, a fan cover 100 arranged on the smoke collecting cover 200, and a fan assembly arranged in a chamber of the fan cover 100. The range hood 10 further includes a detection device 300, a control device 400, and a moving driving device 500, and the range hood can be lifted and lowered through cooperation of the three components.

[0023] Specifically, the detection device 300 can be used to detect the distance d between the user and the range hood. The distance can be the straight-line distance between the highest point (for example, the head) of the user and the lower point (for example, the smoke collecting cover) of the range hood, and the detection of the distance between the user and the range hood can be achieved by setting the position of the detection device 300 on the range hood, or the detection angle of the detection device 400, etc.

[0024] In an embodiment, the detection device 300 can be arranged on the smoke collecting cover 200, which can be arranged on the side of the smoke collecting cover facing the user, or other positions capable of detecting the user and achieving distance detection.

[0025] In combination with Figure 1 and Figure 4 In an embodiment, the detection device 300 can include a first sensor A and a second sensor B, which can be arranged on the left and right sides of the front of the smoke collecting cover 200, respectively. As for the relative distance X ab between the two sensors, it can be adjusted according to the detection needs. In one case, when the distance value is needed, it can be stored in the relevant module of the range hood in advance. Here, the front can be understood as the side facing the user in the normal use of the range hood.

[0026] In an embodiment, the detection device 300 can be an infrared sensor, an optical sensor, an ultrasonic sensor, etc.

[0027] In an embodiment, the detection device 300 can detect the user or upload relevant detection data within a preset time interval.

[0028] In one embodiment, the moving driving device 500 is used to drive the range hood to move up and down according to the received control signal. Here, the moving up and down of the range hood can be achieved by driving the fan cover 100 to move up and down to drive the smoke collecting cover 200 to move up and down, or by directly driving the smoke collecting cover 200 to move up and down by the moving driving device 500. The specific moving up and down mechanism can be achieved by using the existing structure.

[0029] Referring to Figure 1 , the highest point of the range hood that can be moved up is h0, and with the highest point as the reference system, the lowest point of the range hood that can be moved down or the position corresponding to the height h2 of the best oil fume suction rate, and the height h1 of the safety position to avoid the user from colliding with the range hood. The height of the safety position can be equivalent to the highest point h0.

[0030] In one embodiment, the control device 400 is used to generate a control signal for controlling the moving up and down of the range hood according to at least the detection data of the detection device 300, and send the control signal to the moving driving device 500 to drive the range hood to move up and down. The specific control method will be described in detail below.

[0031] As Figure 3 A control method of a range hood, comprising:

[0032] S100, at least obtaining the distance d between the user and the range hood determined by the detection device 300. Here, the distance d can be understood as the straight line distance between the user and the range hood directly detected by the detection device, or the straight line distance between the user and the range hood indirectly obtained. For details, please refer to the description below.

[0033] S200, when the distance is not greater than a first preset value, controlling the range hood to move from the current position to a first position of the range hood. Here, the first position can be understood as a safety position to avoid the user from colliding with the range hood.

[0034] In this way, the range hood can be automatically raised to a certain safety height according to the height information of different users or different postures of the same user, and the user can be prevented from colliding with the range hood.

[0035] Generally, the range hood is installed on a wall body, and the moving up and down is achieved by the moving driving device 500. The range hood has a certain moving up and down range, and if the highest point of the moving up and down range is taken as the reference point, the highest point is h0.

[0036] In the first use of the range hood, two positions can be set in the system, one is the safety position of the range hood, which can be recorded as the first position, and the height relative to the reference point is h1. The safety height can be understood as the user will not collide with the range hood when the range hood is at the position of h1. Usually, the safety position is higher than the user's height. One is the position of the range hood when the range hood has the highest oil fume suction rate, recorded as the second position, and the height relative to the reference point is h2. In addition, it also includes a default position, that is, the current position of the range hood, and the height is h.

[0037] In one embodiment, the distance d between the user and the range hood can be obtained as follows.

[0038] As Figure 1 and 4 , the first sensor A and the second sensor B are arranged on both sides of the range hood, and the distance between the user and each sensor is obtained through the first sensor A and the second sensor B, recorded as the first distance X a and the second distance X b ; the distance between the two sensors is X ab . The distance d between the user and the range hood can be calculated by the Pythagorean theorem as follows:

[0039] Where p represents half the perimeter of the triangle.

[0040] In one embodiment, the first position can be a fixed position. The setting of this position can generally meet the height of users within a certain range, so that these users will not collide when using the range hood. It can also meet the change of distance d caused by the movement or different postures of the same user.

[0041] In one embodiment, in the same user scenario, the movement or different postures of the user will cause the distance between the user and the range hood to change. In this case, the setting of the first position can be automatically adjusted according to the distance between the range hood and the user to meet the distance between the user and the range hood is not less than the second preset value.

[0042] For example, when the range hood moves to the first position, the user may lean forward to observe the cooking condition. At this time, the distance between the user and the range hood should at least meet a preset value to avoid the head and the range hood from colliding. Figure 5In the embodiment, the range hood moves to the first position h1 and stops, and the distance between the range hood and the user is d, and the user is at position E. During the cooking process, the user usually does not keep a posture, and the user can approach the range hood to position F or move away from the range hood to position G, and the distance between the range hood and the user changes. In order to avoid colliding with the range hood, the first position should satisfy that the distance between the user and the range hood is not less than d'. The preset value d' can be set according to experiments and the like.

[0043] In an embodiment, the safe height or the first position corresponding to users of different heights can be different. The first position can also be automatically adjusted according to the distance between the range hood and the user, so that users of different heights can avoid colliding with the range hood when using the range hood. That is, the value of the safe position h1 is adjustable.

[0044] Specifically, the height of the first position satisfies that when the detection device detects users of different heights, the range hood is raised to the first position, and the distance between the user and the range hood is not less than a second preset value.

[0045] For example, Figure 6 In the embodiment, three users U1, U2 and U3 of different heights, when these users are at the same detection point, in order to satisfy the requirement that users of different heights do not collide with the range hood, the setting of the height h1 of the first position should satisfy that the distance between the user and the range hood is not less than the distance d' corresponding to the user U3 of the highest height.

[0046] In an embodiment, when the range hood reaches the first position, the minimum distance between the user and the range hood is equal to the second preset value, and the range hood is stopped at the first position.

[0047] In an embodiment, the first position can be preset by the user. Preferably, the range hood comprises a plurality of preset different first positions, and the first position is determined according to the distance between the user and the range hood.

[0048] In an embodiment, the first position can be the highest point at which the range hood can be raised.

[0049] In an embodiment, the condition for triggering the range hood to rise further comprises: obtaining a first speed of the user relative to the range hood; and when it is determined that the first speed is greater than zero, controlling the range hood to move upward from the current position to the first position of the range hood.

[0050] Specifically, when the user enters the detection range of the sensor, the sensor can upload the first distance and the second distance between the current user and the sensor detected in the preset time interval At, and obtain the distance d between the user and the range hood. And according to the change of the distance, the first speed V of the user relative to the range hood is obtained.

[0051] When the user is moving towards the range hood instead of being stationary or moving away from the range hood, i.e. the first speed is greater than zero, the range hood is controlled to move upwards from the current position to the first position of the range hood.

[0052] In one embodiment, the range hood is controlled to move from the current position to the first position of the range hood by judging both the distance between the user and the range hood and the first speed of the user moving relative to the range hood.

[0053] In one embodiment, when the condition of the range hood moving upwards is triggered, the range hood moves upwards at a speed to avoid the user approaching the range hood from colliding with the range hood.

[0054] Specifically, the method further comprises controlling the range hood to move upwards from the current position to the first position of the range hood at a second speed, wherein the second speed satisfies the following condition: the time T h for the range hood to move to the first position of the range hood at the second speed is not greater than the time T d for the user to move relative to the range hood at the first speed.

[0055] The second speed is obtained by the following formula: V h ≥ ΔhV / d, wherein Δh represents the displacement change of the range hood moving upwards from the current position to the first position of the range hood, V represents the first speed of the user moving towards the range hood, and d represents the distance between the user and the range hood.

[0056] Given the time T d for the user to move to the range hood, T d = d / V,

[0057] the time T h for the range hood to move to the first position is Δh / V h .

[0058] The second speed is obtained by reasoning from the above two formulas and the relationship between T d and T h .

[0059] In one embodiment, when the range hood moves to the safe position, i.e. the first position, it will stay at this position for a period of time.

[0060] When the staying time exceeds the preset time, the detection device 300 detects again the distance between the user and the range hood and the first speed of the user relative to the range hood. When the user is far away from the range hood, i.e. the distance d between the user and the range hood is greater than a third preset value, or the user is moving away from the range hood and is not moving or moving towards the range hood, i.e. the first speed is less than zero, the range hood is controlled to move downward from the first position to the second position. Thus, the range hood can be controlled to drop to a certain position when the user is away from the range hood, and the oil fume suction rate is improved.

[0061] The second position can be a position at which the best oil fume suction rate can be obtained.

[0062] In summary, the above scheme reduces the complexity of the user adjusting the height of the range hood, meets the needs of the user diversity, improves the user's cooking experience, and greatly facilitates the user.

[0063] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiments can be completed by a program instructing the related hardware, and the program can be stored in a computer readable storage medium, which can include ROM, RAM, magnetic disk or optical disk, etc.

[0064] Although the present application has been disclosed as above, the present application is not limited to this. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A control method of an extractor hood, characterized in that, The method comprises: acquiring at least the distance d between the user and the range hood and the first speed of the user relative to the range hood determined by the detection device; controlling the range hood to move upward from the current position to a first position of the range hood when it is determined that the distance d is not greater than a first preset value and the first speed is greater than zero, wherein the first position is a safe position to avoid collision between the user and the range hood; further comprising: detecting the distance d between the user and the range hood and the first speed of the user relative to the range hood by the detection device again when the range hood stays at the first position for a preset time; and controlling the range hood to move downward from the first position to a second position when the distance d is greater than a third preset value or the first speed is less than zero, wherein the second position is a position at which the best oil fume suction rate can be obtained.

2. The control method according to claim 1, characterized by, The detection device comprises a first sensor and a second sensor, and the distance between the user and each sensor is acquired by the first sensor and the second sensor respectively, denoted as a first distance and a second distance; and the distance between the user and the range hood is acquired according to the first distance and the second distance.

3. The control method according to claim 1, characterized by, Further comprising: acquiring the first speed of the user relative to the range hood according to the change of the distance.

4. The control method according to claim 1, characterized by, determining the first position according to the distance between the user and the range hood, so that the distance between the user and the range hood is not less than a second preset value.

5. The control method according to claim 1, characterized by, controlling the lifting of the range hood, so that the minimum distance between the user and the range hood when the range hood reaches the first position is equal to the second preset value, and the range hood stays at the first position.

6. The control method according to claim 1, characterized by, The first position can be preset by the user.

7. The control method according to claim 6, characterized by, The range hood comprises a plurality of preset different first positions, and the first position is determined according to the distance between the user and the range hood.

8. The control method according to claim 1, characterized by, Further comprising: controlling the range hood to move upward from the current position to the first position of the range hood at a second speed, wherein the second speed satisfies the following condition: the time for the range hood to move to the first position of the range hood at the second speed is not greater than the time for the user to move relative to the range hood at the first speed.

9. The control method according to claim 8, characterized by, The second speed is obtained by the following equation: V h ≥ AhV / d, where Ah represents a displacement change of the range hood moving upward from the current position to the first position of the range hood, V represents the first speed of the user moving toward the range hood, and d represents the distance between the user and the range hood.

10. A range hood comprising a control device, a detection device, and a moving driving device; characterized in that, The detection device is configured to determine the distance between the user and the range hood; and the control device is configured to control the movement of the range hood according to the control method of any one of claims 1-9, wherein the movement of the range hood is realized by a movement driving device.

11. The range hood of claim 10, wherein, The detection device comprises a first sensor and a second sensor, which are respectively arranged on the left and right sides of the range hood.

12. The range hood of claim 11, wherein, The first sensor and the second sensor are configured to transmit the distance between the user and each sensor to the control device according to a preset time interval.

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