CN219140853U

CN219140853U - Fume exhaust fan

Info

Publication number: CN219140853U
Application number: CN202222547930.1U
Authority: CN
Inventors: 陈建平
Original assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Current assignee: Zhejiang Supor Kitchen and Bathroom Electrical Appliance Co Ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-06-06
Anticipated expiration: 2032-09-26

Abstract

The embodiment of the application provides a range hood. The range hood comprises a case assembly, a smoke collecting assembly, a first driving device, a distance measuring device, a second driving device and a controller, wherein the smoke collecting assembly is connected with the case assembly in a lifting manner, and an air suction port is arranged on the smoke collecting assembly; the first driving device is connected with the smoke collecting assembly and used for driving the smoke collecting assembly to lift; the distance measuring device is movably arranged on the chassis assembly along the left-right direction and faces downwards and is used for detecting the distance and generating a distance measuring signal; the second driving device is connected with the distance measuring device and used for driving the distance measuring device to periodically move along the left-right direction; the controller is connected with the first driving device and the distance measuring device and is used for controlling the first driving device to drive the smoke collecting assembly according to a distance measuring signal generated by the distance measuring device in the moving process. This lampblack absorber can carry out accurate lifting control to collection cigarette subassembly, improves the efficiency of range hood, improves user experience.

Description

Fume exhaust fan

Technical Field

The application relates to the technical field of kitchen appliances, in particular to a range hood.

Background

Kitchen ventilators and cookers have been widely used as kitchen utensils. The user utilizes cooking utensil to cook the in-process can produce the oil smoke, through using the lampblack absorber, can effectively reduce the oil smoke. For the user, not only the amount of the oil smoke inhaled by the user is reduced, the health of the user is protected, but also the cleanliness of the kitchen of the user is maintained.

The suction inlet of the range hood in the prior art is mostly in a fixed state. In other words, once the range hood is installed, the relative position relation of the air suction inlet relative to the kitchen range is unchanged. A specific smoking area is formed between the suction inlet and the kitchen range.

In the using process of the range hood, the cooking modes of users are quite different, and the shapes of the cooking cookers are quite different. Under various application conditions, the conventional range hood is poor in universality, and good smoking effect is difficult to keep all the time on the premise of ensuring that a user can cook conveniently, so that the user experience is influenced.

Disclosure of Invention

In order to at least partially solve the problems in the prior art, according to one aspect of the present application, a range hood is provided. The range hood comprises a case assembly, a smoke collecting assembly, a first driving device, a distance measuring device, a second driving device and a controller, wherein the smoke collecting assembly is connected with the case assembly in a lifting manner, and an air suction port is arranged on the smoke collecting assembly; the first driving device is connected with the smoke collecting assembly and used for driving the smoke collecting assembly to lift; the distance measuring device is movably arranged on the chassis assembly along the left-right direction and faces downwards and is used for detecting the distance and generating a distance measuring signal; the second driving device is connected with the distance measuring device and used for driving the distance measuring device to periodically move along the left-right direction; the controller is connected with the first driving device and the distance measuring device and is used for controlling the first driving device to drive the smoke collecting assembly according to a distance measuring signal generated by the distance measuring device in the moving process.

According to the scheme, the range hood can realize real-time lifting control of the smoke collecting assembly according to real-time moving ranging of the ranging device. In addition, the distance measuring device in operation can acquire the distance information of a plurality of positions below the distance measuring device in real time in the moving process, so that the state of the cooking utensil below the distance measuring device can be accurately detected, and the accurate lifting control of the smoke collecting assembly can be realized. And then can improve lampblack absorber range hood's efficiency greatly under the prerequisite of guaranteeing user's cooking operation's convenience, and then show improvement user experience.

Illustratively, the ranging device includes a left ranging device movable left and right within a left range of the housing assembly corresponding to the left jamb, and a right ranging device movable left and right within a right range of the housing assembly corresponding to the right jamb.

According to the scheme, the range hood can simultaneously range through the two range finders arranged left and right. The detection efficiency can be improved, and then the control efficiency of the controller to the smoke collecting assembly in real time can be improved. And in addition, the method can also provide possibility for flexibly controlling other components of the range hood according to different states of the cooking appliances on the two stove heads so as to improve the controllability and the user experience of the range hood.

Illustratively, the left side range includes a first position corresponding to a first distance to the right of the right edge of the left jamb and/or a second position corresponding to a second distance to the left of the left edge of the left jamb, and the right side range includes a third position corresponding to a third distance to the left of the left edge of the right jamb and/or a fourth position corresponding to a fourth distance to the right of the right edge of the right jamb.

According to the scheme, the left distance measuring device and the right distance measuring device can at least move left and right in the area corresponding to the edge of the furnace end, so that the distance between the distance measuring device and the cooking utensil on the furnace end can be conveniently, effectively and accurately obtained, further, the accurate control of the smoke collecting assembly can be realized, and the user experience is improved.

The second driving device may include a left driving device and a right driving device, the left driving device being connected to the left ranging device, the right driving device being connected to the right ranging device, the controller being further connected to the left driving device and the right driving device, respectively, to control the left driving device and the right driving device to drive the corresponding ranging device, respectively.

According to the scheme, the left distance measuring device and the right distance measuring device of the range hood can be controlled through independent driving devices. Thus, ineffective movement of the distance measuring device is avoided, so that energy consumption can be reduced and the service life of the range hood can be prolonged. In addition, the controller can coordinate and control the first driving device and the second driving device, and further, the smoke collecting assembly and all the distance measuring devices are scheduled in a unified mode. Therefore, the controller can effectively utilize all ranging signals measured by the 2 ranging devices, the control logic is simpler, and control errors are not easy to occur.

The distance measuring device is movable left and right within a central range corresponding to the two burners, the leftmost side of the central range corresponding to the central position of the left burner, and the rightmost side of the central range corresponding to the central position of the right burner.

According to the scheme, the smoke collecting assembly can be controlled to lift only by moving left and right in the central range corresponding to the two furnace heads through one distance measuring device, and the calculated amount of the controller can be reduced.

Illustratively, the horizontal projection of the movement trajectory of the distance measuring device coincides with the horizontal projection of the transverse central axis of the burner.

According to the scheme, the horizontal projection of the moving track of the distance measuring device can be coincident with the horizontal projection of the transverse central axis of the furnace end. Therefore, the distance between the highest point of the cooking utensil and the distance measuring device can be effectively and accurately obtained, and the smoke collecting assembly can be lifted to the most proper height, so that the efficient use of the range hood can be realized on the premise of being convenient for cooking operation of a user.

The controller is also connected to a second drive device for controlling the second drive device to drive the distance measuring device.

According to the above scheme, the controller can coordinate and control the first driving device and the second driving device. Thus, the control logic of the controller is simpler, and control errors are not easy to occur.

Illustratively, the air inlet is provided with an openable air deflector, and the controller is further configured to control the opening and closing of the air deflector according to the ranging signal.

The range hood can open and close two air deflectors of the range hood according to the ranging signals of the ranging device. The attractive appearance of the range hood in the non-working period is ensured, and the smoke collecting and smoking effects of the range hood are ensured.

Illustratively, the distance measuring device is disposed at the bottom of the smoke collection assembly.

Thus, the distance measuring device is conveniently hidden outside the sight of the user, and the overall visual effect of the range hood can be improved. In addition, the distance information below can be conveniently and accurately acquired, and interference caused by other factors is avoided.

Illustratively, the distance measuring device is an ultrasonic distance measuring device.

Because the ultrasonic ranging device has stable performance, accurate measurement distance and small blind area. The accuracy of the distance information obtained by the controller is guaranteed, and then the accurate control effect of the controller on the smoke collecting assembly can be guaranteed.

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

Advantages and features of the present application are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present application are included to provide an understanding of the present application as part of the present application. Embodiments of the present application and descriptions thereof are shown in the drawings to explain the principles of the present application. In the drawings of which there are shown,

fig. 1 shows a schematic view of a range hood according to one embodiment of the present application;

FIG. 2 illustrates a graph of distance information detected by a ranging device according to one embodiment of the present application;

fig. 3 shows a schematic view of a range hood according to another embodiment of the present application; and

fig. 4 shows a side view of a range hood according to one embodiment of the present application.

Wherein the above figures include the following reference numerals:

110. a chassis assembly; 120. a smoke collecting assembly; 130. a first driving device; 140. a distance measuring device; 150. a second driving device; 160. a controller; 141. a left ranging device; 142. a right distance measuring device.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present application. However, it will be understood by those skilled in the art that the following description illustrates preferred embodiments of the present application by way of example only and that the present application may be practiced without one or more of these details. In addition, some technical features that are known in the art have not been described in detail in order to avoid obscuring the present application.

In practical application, the closer the suction inlet of the range hood is to the cooking utensil, the better the smoking effect. As described above, the air intake of the conventional range hood is fixed and cannot be adjusted according to the height of the cooking appliance. In case that the current cooker is high, for example, the distance between the suction port and the cooker is too small, which may cause inconvenience to the user in cooking operation. Under the condition that the current cooker is low in height, a smoke collecting area between the air suction inlet and the cooker is large, and the phenomenon that the smoke overflows and the smoke sucking effect of the range hood is influenced is difficult to avoid.

In order to at least partially solve the above problems, according to an embodiment of the present application, a range hood is provided. Fig. 1 shows a schematic view of a range hood according to one embodiment of the present application. The range hood may include a cabinet assembly 110, a smoke collecting assembly 120, a first driving device 130, a ranging device 140, a second driving device 150, and a controller 160. The chassis assembly 110 may include a chassis housing, a blower (not shown) disposed inside the chassis housing, a smoke collecting duct (not shown), and the like. The top of the fume collecting duct may include an air outlet, which may be located at the top of the chassis housing. The case housing may be rectangular or the like. The fan may be any fan that is present or developed in the future. A fan may be used to create the negative pressure. The fan may be communicated with the smoke collecting assembly 120 through a smoke collecting pipe to suck the smoke around the smoke collecting assembly 120 into the smoke collecting pipe and discharge the smoke through an air outlet. The number of fans can be one or a plurality of fans. In the case that the number of the fans is plural, each fan can be independently operated and corresponds to one smoke collecting pipeline. The smoke collecting duct may include a hard tube or a flexible tube (e.g., a bellows tube), and is not particularly limited.

The smoke collecting assembly 120 is connected with the chassis assembly 110 in a lifting manner. The chassis assembly 110 and the smoke collecting assembly 120 may be connected by a lifting rail. By way of example and not limitation, the lifting rail may be disposed inside the chassis assembly 110, for example, the lifting rail may be fixedly disposed on both the left and right sides of the rear wall of the chassis assembly 110, and the smoke collection assembly 120 and the chassis assembly 110 may be generally in a "drawer" type structure. The smoke collecting assembly 120 is movable along the lifting rail between a lowermost lowered position and an uppermost raised position under the drive of the first drive means 130. The exposed portion of the smoke collecting assembly 120 extending out of the chassis assembly 110 may become progressively larger as it is progressively lowered from the first position to the second position. And may be located entirely or partially within the chassis housing when in the highest raised position.

The smoke collecting assembly 120 may be provided with a suction port. Under the condition that the fan works, the oil smoke near the air suction inlet can be sucked into the air suction inlet and then discharged through the smoke collecting pipeline. The shape of the suction port may be any shape, and the number thereof may be any number, without being particularly limited. Alternatively, the number of suction openings may be two, and each suction opening may correspond to a burner located therebelow. When the number of the air suction openings is 2, each air suction opening can be connected with the corresponding fan through the smoke collecting pipeline, so that the fan can be independently controlled and the nearby oil smoke can be adsorbed. Or the number of the air inlets is 2, the number of the fans is 1, and the oil smoke sucked from the 2 air inlets can be sucked to the fans through one smoke collecting pipeline and discharged through the air outlets. The outside of each air suction inlet can be provided with an air deflector which can be automatically opened and closed so as to realize the independent control of the opening and closing of each air suction inlet.

The suction port of the smoke collecting assembly 120 may be provided at a side of the bottom of the smoke collecting assembly 120. For example, the suction port may be stowed within the chassis housing when the smoke collection assembly 120 is in the highest raised position. And when the smoke collecting assembly 120 descends, the air suction port can extend out of the chassis shell. And the suction inlet of the smoke collecting assembly 120 can be communicated with the smoke collecting pipe in the process of lifting and lowering the smoke collecting assembly 120. Therefore, the smoke collecting assembly 120 with the arrangement can adjust the height of the air suction inlet by adjusting the position of the smoke collecting assembly 120, so that the air suction inlet is positioned at a position more favorable for collecting the oil smoke.

The first driving device 130 may be connected to the smoke collecting assembly 120, and is used for driving the smoke collecting assembly 120 to lift. The first driving device 130 may be any suitable driving device, as long as it can drive the smoke collecting assembly 120 to lift and lower. For example, the first driving means 130 includes a motor and a connection rod. The first driving device 130 may be connected with the smoke collecting assembly 120 through a connection rod. The connecting rod may comprise a hydraulic or pneumatic push rod or the like.

The ranging device 140 may be movably disposed on the cabinet assembly 110 in a left-right direction and downward facing for detecting a distance and generating a ranging signal. Ranging device 140 may include any suitable ranging sensor, such as an infrared pyroelectric sensor, an ultrasonic sensor, a radar sensor, and the like. The number of the distance measuring devices 140 may be 1 or more. Ranging device 140 may be disposed on the front of chassis assembly 110, for example, outside the front wall of the chassis enclosure. Ranging device 140 may also be disposed at the bottom of chassis assembly 110. Of course, ranging device 140 may be positioned in other suitable locations. The distance measuring device 140 is directed downward, for example the measuring probe is directed downward, in order to detect distance information of an object located below it, which is closest to the probe.

The second driving device 150 may be connected to the ranging device 140, for example, may be electrically connected to the ranging device 140. The second driving device 150 may be any type of driving device as long as it can be implemented to drive the ranging device 140 to move. By way of example and not limitation, the second drive 150 may include a motor. The second driving means 150 may be used to drive the ranging device 140 to periodically move in the left-right direction. As shown in fig. 1, the ranging device 140 may be disposed in a movable area below the outside of the front wall of the cabinet housing. The movable area may be set arbitrarily according to the requirement, for example, the movable area may include the whole area corresponding to the burner. The second driving means 150 may be used to drive the ranging means 140 to periodically move left and right along the movable area. For example, the second driving device 150 may drive the ranging device 140 to reciprocate between the left side of the movable area to the right side of the movable area.

The controller 160 may be respectively in data connection with the ranging device 140 and the first driving device 130, and is configured to control the first driving device 130 to drive the smoke collecting assembly 120 according to a ranging signal generated by the ranging device 140 during a moving process. The controller 160 may be configured to acquire a ranging signal generated during movement of the ranging device 140, and further may acquire minimum distance information in the ranging signal generated during movement of the ranging device 140 during a previous preset period of time. The previous preset time period may be a time greater than one movement period of ranging device 140. For example, one movement period taken by the ranging device 140 to move through the movable region once is 1 second, the previous preset period may be the first 1 second or the first 2 seconds, etc.

It is easily understood that ranging device 140 may detect information of its nearest object below it in real time during movement. During its movement, when a cooking appliance is included thereunder, it may detect distance information of the device to the highest point of the cooking appliance. In the case where the cooking appliance of the burner region is stationary, the detected distance information may be different when the distance measuring device 140 is moved to a different position. In the case where the burner region includes cookers of different heights, the distance information detected by the movement of the ranging device 140 to different positions may be different. For example, when ranging device 140 is moved over a small height wok, it detects distance information of ranging device 140 from the wok. And when the ranging device 140 moves above the steamer with a larger height, it detects the distance information of the ranging device 140 from the steamer. In addition, for the same cooking appliance, the ranging device 140 can effectively detect whether the cooking appliance is covered or not in the moving process. For example, in operation of the range hood shown in fig. 2, when the rangefinder 140 is moved over the edge of the pan on the left head that is not covered by the lid, it detects the distance d1 of the rangefinder 140 from the edge of the pan directly below it. When the distance measuring device 140 moves above the center of the wok without being covered, the distance d2 between the distance measuring device 140 and the bottom of the wok is detected. When distance measuring device 140 is moved to the edge of the pan of the same size lid on the right head, it detects the distance d1 between distance measuring device 140 and the edge of the pan. When the distance measuring device 140 moves above the center of the lid frying pan, it detects the distance d3 between the distance measuring device 140 and the top end of the lid handle.

Fig. 2 shows a graph of distance information detected by ranging device 140 according to one embodiment of the present application. As shown, the distance detected by ranging device 140 during one movement period of the movable region may vary over time. The controller 160 may obtain the minimum distance in the movement period from the ranging signal generated by the ranging device 140 in the movement period. It will be appreciated that the minimum distance corresponds to the maximum height of the underlying object. Thus, controller 160 may obtain a minimum distance of ranging device 140 from an object therebelow based on the ranging signal during the period. For example, the distance d3 from the top end of the pot lid handle to the distance measuring device 140 shown in fig. 2 may be obtained. And the first driving device 130 can be controlled to drive the smoke collecting assembly 120 to ascend and descend according to the minimum distance.

After determining the minimum distance according to the ranging signal generated during the movement of the ranging device 140 in the previous preset period of time, the controller 160 may control the smoke collecting assembly 120 to ascend or descend according to the magnitude relation between the currently determined minimum distance and the previously determined minimum distance. The above-mentioned size relationship may represent a state change of the cooking appliance above the burner, whereby it may be achieved to control the real-time elevation of the smoke collecting assembly 120 according to the state change of the cooking appliance. For example, the lifting of the smoke collecting assembly 120 can be controlled in real time based on state changes such as a pot moving state, a pot changing state, a pot cover opening and closing state and the like. By way of example and not limitation, upon a change from a taller cooking appliance to a shorter cooking appliance, the controller 160 may control the smoke collection assembly 120 to descend based on the currently determined minimum distance being greater than the previously determined minimum distance.

Specifically, the controller 160 may determine the minimum distance information h according to the ranging signal generated during the movement of the ranging device 140 in the ith preset time period after the range hood is started _i I is a positive integer. The controller 160 may at least based on the minimum distance information h within the current period _i Minimum distance information h from last period _i-1 The difference deltah between them controls the elevation of the fume collection assembly 120. For example, in general, the smoke collection assembly 120 may be controlled to drop if the difference Δh is a positive value. In the case where the difference Δh is a negative value, the smoke collecting assembly 120 is controlled to rise. Alternatively, the difference may be compared to a preset difference threshold. By way of example and not limitation, the difference threshold may include a first difference threshold that may be positive and a second difference threshold that may be negative. The drop of the smoke collecting assembly 120 may be controlled only if the difference ah is greater than the first difference threshold. In the event that the difference Δh is less than the second difference threshold, the fume collection assembly 120 is controlled to rise. Therefore, the real-time and accurate control of the smoke collecting assembly of the range hood can be realized. And, the controller 160 may also control the reset of the smoke collecting assembly 120. For example, when the range hood is detected to be turned to a shutdown state, the smoke collecting assembly 120 may be controlled to be reset, where the smoke collecting assembly 120 may be controlled to return to an original position, for example, the smoke collecting assembly 120 may be controlled to return to a highest lifting position, such as being completely hidden inside the chassis housing. The controller 160 may also determine a pot moving state in which the cooking appliance therebelow is moved based on minimum distance information in the ranging signal generated by the ranging device during movement, and may control the smoke collecting assembly 120 to be reset when determining the pot moving state of the cooking appliance. For example, the controller 160 may generate the minimum distance information h for each period in the ranging signal in real time by the ranging device 140 _i And comparing with the first preset distance. The first preset distance is, for example, equal to the distance between the highest point of the burner and the distance measuring device 140. The controller 160 may be at h _i When the distance is greater than or equal to the first preset distance, the cooking utensil on the stove head is determined to be removed, and then the set can be controlledThe smoke assembly 120 is reset. And may control the smoke collecting assembly 120 to descend again in case the minimum distance information of the next preset time period indicates that the cooking appliance exists on the burner, for example, in case the minimum distance of the next preset time period is less than the first preset distance. Therefore, the smoke collecting assembly can be allowed to reset, unnecessary work of the range hood is avoided, and environmental dust pollution of the smoke collecting assembly when the smoke collecting assembly does not work is avoided. And the smoke collecting assembly can be smoothly lowered to an ideal working state after being reset, so that the working effect of the range hood is ensured.

The controller 160 may control the first driving device 130 in various suitable ways. For example, the first driving device 130 may be controlled by a high-level signal to drive the smoke collecting assembly 120 to rise, and the first driving device 130 may be controlled by a low-level signal to drive the smoke collecting assembly 120 to fall. It is also possible to control the single elevation of the smoke collecting assembly 120 by controlling the single energization elevation time of the first driving means 130. For example, the controller 160 may determine an initial power-on descent time of the smoke collecting assembly 120 based on a difference between a minimum distance detected by the ranging device 140 in a movement of a current period and a second preset distance, and a fixed ascent and descent speed of the smoke collecting assembly 120 at an initial time after the power-on of the smoke collecting assembly 120. The second preset distance may be set based on an ideal distance of the smoke collecting assembly from the top end of the cooking appliance. After the initial time, the controller 160 may determine the power-on elevation time of the smoke collecting assembly 120 based on a difference Δh between the minimum distance detected by the ranging device 140 in the movement of the current period and the minimum distance detected by the previous period. For example, the difference Δh may be divided by a fixed lift speed of the fume collection assembly 120 to determine the energization lift time of the fume collection assembly 120. Thus, the controller 160 may enable accurate elevation control of the fume collection assembly 120.

Of course, the controller 160 may also control the first driving device 130 to drive the smoke collecting assembly 120 to ascend or descend in other suitable manners.

It should be noted that, as used herein, the terms "upper", "lower", "front", "rear", "left" and "right" are all relative to the user when the range hood is in use.

It can be appreciated that the fixedly arranged distance measuring device is difficult to accurately detect the state of the cooking appliance according to complicated cooking situations. For example, in the case of a pot that is not covered, the height detected by the distance measuring device may be the height of the food material at the bottom of the pot, rather than the actual height of the pot itself. In particular, in the case of a higher pot, the food level at the bottom of the pot may be lower. If the height of the air suction opening is adjusted according to the height of the food material at the bottom of the pot, the air suction opening can be lowered too low, even below the height of the edge of the pot. Therefore, the operation of cooking food materials in the cooker is inconvenient for a user, and the smoking effect of the range hood is seriously affected. According to the scheme, the range hood can realize real-time lifting control of the smoke collecting assembly according to real-time moving ranging of the ranging device. In addition, the distance measuring device in operation can acquire the distance information of a plurality of positions below the distance measuring device in real time in the moving process, so that the state of the cooking utensil below the distance measuring device can be accurately detected, and the accurate lifting control of the smoke collecting assembly can be realized. And then can improve lampblack absorber range hood's efficiency greatly under the prerequisite of guaranteeing user's cooking operation's convenience, and then show improvement user experience.

As previously described, the smoke collecting assembly 120 may be provided with suction openings, such as left and right suction openings. Illustratively, the air intake may be provided with an openable air deflector, and the controller 160 is further configured to control opening and closing of the air deflector according to the ranging signal.

According to the embodiment of the application, an air deflector can be further arranged above each air suction port. The air deflector may be of any suitable material and may be provided in any suitable configuration. The air deflector is used for guiding the air flowing into the air suction port, so that the process of the air entering the smoke collecting pipeline is smoother, and the air suction port can collect the oil smoke conveniently. For example, the air deflector may be inclined rearward in an upward direction from the lower edge of the suction inlet. The controller 160 may also control the opening and closing of the left and right air deflectors according to the minimum distance information detected by the ranging device 140. For example, the controller 160 may control the opening and closing state of the air guide plate, or may also control the opening and closing angle of the air guide plate. For example, in the case that the cooking appliance of the burner is removed, the minimum distance shown by the ranging signal acquired by the controller 160 may reach a certain threshold value, so that the inclination angle of the air deflector may be controlled to be gradually reduced until it is closed.

Therefore, the range hood can open and close the two air deflectors of the range hood according to the ranging signals of the ranging device. The attractive appearance of the range hood in the non-working period is ensured, and the smoke collecting and smoking effects of the range hood are ensured.

Illustratively, the number of ranging devices 140 may be two. Fig. 3 shows a schematic view of a range hood according to another embodiment of the present application. The range unit 140 of the range hood may include a left range unit 141 and a right range unit 142. Left ranging device 141 may be movable left and right within a left range of housing assembly 110 corresponding to a left jamb, and right ranging device 142 may be movable left and right within a right range of housing assembly 110 corresponding to a right jamb. The left distance measuring device 141 may move left and right in an upper region (region shown as W1 in fig. 3) corresponding to the left edge to the right edge of the left jamb. The distance between the cooker above the left burner and the left distance measuring device 141 can be conveniently detected in real time. Similarly, the right ranging device 142 can move left and right in the area corresponding to the left edge to the upper edge of the right burner (as shown by W2 in fig. 3), so that the distance between the pan above the right burner and the right ranging device 142 can be conveniently detected in real time. In this way, on the one hand, the distance information between the left ranging device 141 and the cooking appliance on the left burner and the distance information between the right ranging device 142 and the cooking appliance on the right burner can be obtained quickly, so that the controller 160 can conveniently obtain the minimum distance quickly, and the lifting control efficiency of the controller 160 on the smoke collecting assembly 120 is improved. On the other hand, the control can be conveniently performed according to different state information of the cooking appliances on the left and right stove heads. By way of example and not limitation, the smoke collection assembly 120 may be provided with a left air intake and a right air intake, and the chassis assembly 110 includes a left blower in communication with the left air intake and a right blower in communication with the right air intake. The controller 160 may also independently control the switching of the left and right fans according to different minimum distances of the previous preset time period detected by the left and right ranging

devices

141 and 142. For example, the left blower may be controlled to turn on when the minimum distance detected by left ranging device 141 is less than a certain threshold. And when the minimum distance detected by the right ranging device 142 is greater than the threshold, the right blower is controlled to be turned off.

For example, the left side range may include a first position corresponding to a first distance to the right of the right edge of the left burner and/or a second position corresponding to a second distance to the left of the left edge of the left burner, and the right side range may include a third position corresponding to a third distance to the left of the left edge of the right burner and/or a fourth position corresponding to a fourth distance to the right of the right edge of the right burner. The first distance, the second distance, the third distance, and the fourth distance may be equal or unequal. Optionally, the first distance, the second distance, the third distance, and the fourth distance are all equal. The first distance, the second distance, the third distance and the fourth distance may be any suitable distance values, for example may be distance values between 5cm and 20 cm. It is easily understood that the cooking appliances in daily life are diverse in shape and size, for example, the size of the cooker may exceed the maximum range of the burner. In order to accurately detect the height information of the cooking appliance under the ranging devices 140, particularly the height information of the edge of the cooking appliance, the movable area of each ranging device 140 may be set to be large.

For simplicity, the following description will be given by taking only the left range corresponding to the left distance measuring device 141 as an example. The left side range may include a second position of the left edge of the left burner to a second distance to the left. The second distance is for example 10cm. For example, the left side range may be an area on the chassis assembly 110 corresponding to a second position 10cm to the left from the center to the left edge of the left burner. The left ranging device 141 can move in the area, and thus the distance between the pot cover of the cooking appliance on the left burner or the left edge thereof and the left ranging device 141 can be effectively obtained. Alternatively, the movable range of the left ranging device 141 may be an area on the chassis assembly 110 corresponding to a first position from the center to the right edge of the left burner by 10cm to the right, so as to effectively obtain the distance between the cover of the cooking appliance on the left burner and the right edge of the cover and the left ranging device 141.

Illustratively, the second drive 150 includes a left drive connected to the left ranging device 141 and a right drive connected to the right ranging device 142. The controller 160 is further connected to the left driving device and the right driving device, respectively, to control the left driving device and the right driving device to drive the corresponding ranging device 140, respectively. According to the embodiment of the present application, the left ranging device 141 and the right ranging device 142 may also be independently controlled by two driving devices, respectively. For example, the left and right driving devices each include a motor. The left ranging device 141 is electrically connected with the left motor to be driven by the left motor; the right ranging device 142 is electrically connected to the right motor to be driven by the right motor. Specifically, the controller 160 may be connected to the left and right driving devices, respectively, and may also independently control the operation of each driving device. For example, the controller 160 may determine whether a cooking appliance exists on the left jamb by acquiring minimum distance information of the left ranging device 141, and may control the left motor to stop operating in a state where it is determined that the cooking appliance does not exist on the left jamb, so as to avoid ineffective movement of the left ranging device 141.

It will be appreciated that even though ranging device 140 includes a plurality of ranging devices 140, such as left ranging device 141 and right ranging device 142, each of the ranging devices 140 may be driven using a second driving device 150 such that the ranging devices 140 are capable of moving in a synchronous, co-directional or counter-directional manner, thereby traversing their range of movement. In this case, the controller may or may not be connected to the second drive means. For example, the second driving means may autonomously drive the ranging means 140 to move.

In the technical scheme, the range hood is low in cost.

As described above, the controller 160 may also be connected to the second driving device 150 for controlling the second driving device 150 to drive the ranging device 140. By way of example and not limitation, the second drive 150 may include a motor. The controller 160 may also be electrically connected to the motor, which may be controlled to further control the distance measuring device 140. Optionally, the controller 160 may control the power supply of the second driving device 150 to be turned on and off. For example, in the above example in which the second driving device 150 includes the left driving device and the right driving device, the controller 160 may also control the power of the left driving device corresponding to the burner to be turned off in a case where the cooking appliance on the burner is removed, such as when the cooking appliance on the left burner is removed. Thereby, ineffective movement of the ranging device 140 can be avoided. In another example, the controller 160 may also control the adjustment of the operating speed of the second drive device 150. For example, after the range hood is turned on, the second driving device 150 may be controlled to operate at a relatively high operation speed so that the distance measuring device 140 moves at a relatively high speed to quickly obtain the minimum distance. And after the ranging signal is stationary, for example, after several moving periods, the operation speed of the second driving device 150 may be reduced by outputting a low level.

According to the above scheme, the controller may coordinate control of the first driving device 130 and the second driving device. Thus, the control logic of the controller is simpler, and control errors are not easy to occur.

Alternatively, the controller and the second drive means may not be connected. For example, the second drive means may be a powered actuator. The second driving device can be electrified only by starting the range hood, and can always drive the distance measuring device to periodically move along the left-right direction.

In the technical scheme, the driving scheme of the distance measuring device is simple and easy to realize.

Illustratively, the ranging device 140 is movable left and right within a center range corresponding to two jambs, a leftmost side of the center range corresponding to a center position of the left jamb, and a rightmost side of the center range corresponding to a center position of the right jamb.

The range hood according to the embodiment of the present application may include only one ranging device 140. Since the cooking appliance is generally symmetrical, the height information of a half area of the cooking appliance can be detected by the distance measuring device 140. Accordingly, the movable area of the ranging device 140 may be a central area corresponding to the central range of the two jambs. The center range may be a range between a position corresponding to the center position of the left jamb to a position corresponding to the center position of the right jamb. Thus, during movement of the rangefinder 140, the distance of the top of the right half of the cooking appliance on the left burner from the distance measuring device 140 and the distance of the top of the left half of the cooking appliance on the right burner from the distance measuring device 140 can be obtained. This can improve the detection efficiency of the distance measuring device while reducing the calculation amount of the controller 160. The controller 160 may determine the distance between the highest point of the cooking appliances on the two heads and the ranging device 140 based on the minimum distance in at least one moving period detected by the ranging device 140, thereby performing elevation control of the smoke collecting assembly 120.

Illustratively, the horizontal projection of the movement trajectory of the distance measuring device 140 coincides with the horizontal projection of the transverse central axis of the burner.

Fig. 4 shows a side view of a range hood according to one embodiment of the present application. As shown in fig. 4, the horizontal projection of the movement locus of the distance measuring device 140 (shown by the diagonally filled region in the figure) may coincide with the horizontal projection of the lateral center axis of the burner (shown by the dotted line in the figure). I.e. the distance measuring device 140 may be arranged directly above the transverse centre axis of the burner (circular area in the figure). By way of example and not limitation, ranging device 140 may move from directly above the center location point of the left jamb to directly above the center location point of the right jamb. Typically, the height of the center of the lid corresponds to the maximum height of the cooking appliance, e.g. the lid handle is typically arranged in its center position. Under the condition that the heights of the surfaces of the pot covers are different, the distance between the top end of the center of the pot cover and the distance measuring device 140 can be conveniently and accurately obtained, and therefore the distance between the highest point of the cooking appliance and the distance measuring device 140 can be accurately obtained.

According to the scheme, the moving track of the distance measuring device can be coincident with the transverse central axis of the furnace end. Therefore, the distance between the highest point of the cooking utensil and the distance measuring device 140 can be effectively and accurately obtained, and the smoke collecting assembly can be lifted to the most proper height, so that the efficient use of the range hood can be realized on the premise of being convenient for cooking operation of a user.

Illustratively, the rangefinder 140 may be disposed at the bottom of the smoke collection assembly 120. Thus, the distance measuring device is conveniently hidden outside the sight of the user, and the overall visual effect of the range hood can be improved. In addition, the distance information below can be conveniently and accurately acquired, and interference caused by other factors is avoided.

Illustratively, ranging device 140 is an ultrasonic ranging device 140. Ultrasonic ranging device 140 may generate ultrasonic waves. Since the propagation speed of the ultrasonic wave in the air is known, the actual distance of the ultrasonic ranging device to the object in front can be calculated from the difference between the time the ultrasonic wave is transmitted and the time it is received after being reflected back against an obstacle. In an embodiment of the present application, the front object is a burner of a cooking appliance or a stove.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth words such as "front", "rear", "upper", "lower", "left", "right", "transverse", "vertical", "horizontal", "top", "bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely for convenience of describing the present utility model and simplifying the description, and these azimuth words do not indicate or imply that the device or element to be referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation terms "inner" and "outer" refer to the inner and outer relative to the outline of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one or more components or features' spatial positional relationships to other components or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass not only the orientation of the elements in the figures but also different orientations in use or operation. For example, if the element in the figures is turned over entirely, elements "over" or "on" other elements or features would then be included in cases where the element is "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". Moreover, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and all such cases are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, components, assemblies, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The present utility model has been illustrated by the above-described embodiments, but it should be understood that the above-described embodiments are for purposes of illustration and description only and are not intended to limit the utility model to the embodiments described. In addition, it will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that many variations and modifications are possible in light of the teachings of the utility model, which variations and modifications are within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The range hood is characterized by comprising a case assembly, a smoke collecting assembly, a first driving device, a distance measuring device, a second driving device and a controller, wherein,

the smoke collecting assembly is connected with the case assembly in a lifting manner, and an air suction port is arranged on the smoke collecting assembly;

the first driving device is connected with the smoke collecting assembly and used for driving the smoke collecting assembly to lift;

the distance measuring device is movably arranged on the chassis assembly along the left-right direction and faces downwards and is used for detecting the distance and generating a distance measuring signal;

the second driving device is connected with the distance measuring device and is used for driving the distance measuring device to periodically move along the left-right direction;

the controller is connected with the first driving device and the distance measuring device and is used for controlling the first driving device to drive the smoke collecting assembly according to a distance measuring signal generated by the distance measuring device in the moving process.

2. The range hood of claim 1, wherein the ranging device comprises a left ranging device and a right ranging device, the left ranging device being movable left and right within a left range of the housing assembly corresponding to a left jamb, the right ranging device being movable left and right within a right range of the housing assembly corresponding to a right jamb.

3. The range hood of claim 2 wherein the left side range includes a first position corresponding to a first distance to the right of a right edge of the left burner and/or a second position corresponding to a second distance to the left of a left edge of the left burner, and wherein the right side range includes a third position corresponding to a third distance to the left of the left edge of the right burner and/or a fourth position corresponding to a fourth distance to the right of a right edge of the right burner.

4. The range hood of claim 2, wherein the second driving means includes a left driving means and a right driving means, the left driving means being connected to the left ranging means, the right driving means being connected to the right ranging means, the controller further being connected to the left driving means and the right driving means, respectively, to control the left driving means and the right driving means to drive the corresponding ranging means, respectively.

5. The range hood of claim 1, wherein the distance measuring device is movable left and right within a center range corresponding to two jambs, a leftmost side of the center range corresponding to a center position of a left jamb, and a rightmost side of the center range corresponding to a center position of a right jamb.

6. The range hood of claim 1, wherein a horizontal projection of the movement trajectory of the ranging device coincides with a horizontal projection of a transverse central axis of the burner.

7. The range hood of claim 1, wherein the controller is further coupled to the second drive means for controlling the second drive means to drive the distance measuring device.

8. The range hood of claim 1, wherein the air suction port is provided with an openable air deflector, and the controller is further configured to control the opening and closing of the air deflector according to the ranging signal.

9. The range hood of claim 1, wherein the distance measuring device is disposed at a bottom of the smoke collection assembly.

10. The range hood of claim 1, wherein the range unit is an ultrasonic range unit.