A type of range hood

Abstract

A range hood includes: a smoke collection hood with a hollow interior forming a smoke collection chamber, the front side wall of which has a smoke inlet for external smoke to enter the smoke collection chamber; a smoke baffle, which is rotatably disposed at the smoke inlet to open or close the smoke inlet, and in the open state, the smoke baffle is located above the smoke inlet and extends forward relative to the front side wall of the smoke collection hood; it also includes: a projection optical system disposed on the smoke collection hood and above the smoke baffle, and having an output end for graphic output; simultaneously, the smoke baffle in the open state is made of transparent material and is arranged to reflect the graphic output from the projection optical system to a position above the smoke baffle where the user's eye is located, thereby allowing the user to see a virtual image of the graphic below the smoke baffle through the smoke baffle. This invention allows the user to view the screen while simultaneously monitoring the cooking process inside the pot.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and specifically relates to a range hood. Background Technology

[0002] Existing range hoods rely on the operation of an internal fan system to create a negative pressure zone, allowing the kitchen fumes to escape outdoors under atmospheric pressure. To prevent fumes from escaping, a movable baffle is typically installed at the fumes inlet. A specific example is the Chinese invention patent application (application number 202310804283.4, publication number CN116734301A) entitled "Baffle Driving System, Baffle Driving Method, Range Hood, Storage Medium," which describes a baffle driving system connected to the baffle, including a motor; a transmission mechanism connected between the motor and the baffle, capable of converting the motor's rotational motion into a swinging motion of the baffle; and a hydraulic system connected to the transmission mechanism, used to provide resistance to the transmission mechanism to adjust the driving speed of the baffle.

[0003] For example, the Chinese utility model patent "Range Hood" with patent number 202322365018.9 and authorization announcement number CN220541189U includes: a housing with a first air inlet; a smoke baffle connected to the housing in a rotatable and / or translational manner relative to the housing, capable of opening and closing the first air inlet; an air inlet cavity fitted inside and outside the housing and connected to the housing in a manner capable of moving up and down relative to the housing, the air inlet cavity having a second air inlet; and a motion mechanism having a first power output end for connecting to the smoke baffle and a second power output end for connecting to the air inlet cavity; under the drive of the motion mechanism, the smoke baffle can slide back and forth along the front side wall of the housing and simultaneously deflect up and down along a left-right extending axis to open and close the first air inlet, and the air inlet cavity can move up and down relative to the housing to open and close the second air inlet.

[0004] The design of the smoke baffle can effectively intercept rising fumes and reduce the risk of fumes escaping. However, when the smoke baffle is open, it blocks the user's view between the user and the cookware, affecting the user's observation of the cooking process inside the cookware.

[0005] Meanwhile, some range hoods currently have a display screen on the front for displaying electronic recipes and other images. For example, the Chinese invention patent "A Range Hood" with application number CN202010031763.8 and authorization announcement number CN111023221B has a display screen located above the smoke baffle, so users cannot keep an eye on the cooking process in the pot while looking at the display screen. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a range hood that allows users to view the screen while also keeping an eye on the cooking process inside the pot.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood, comprising:

[0008] A smoke hood with a hollow interior forming a smoke collection chamber, and a smoke inlet on the front side wall of the smoke hood for external smoke to enter the smoke collection chamber.

[0009] A smoke baffle is provided at the smoke inlet in a flip-out manner to open or close the smoke inlet. In the open state, the smoke baffle is located above the smoke inlet and extends forward relative to the front side wall of the smoke collection hood.

[0010] Its characteristic is that it also includes:

[0011] The projection optical system is located on the smoke hood, above the smoke baffle, and has an output terminal for graphic output;

[0012] Meanwhile, the smoke baffle in the open state is made of transparent material and is arranged to reflect the image output by the projection optical system to the position of the user's eye above the smoke baffle, so that the user can see the virtual image of the image below the smoke baffle through the smoke baffle.

[0013] In this way, when the range hood is working and the baffle is open, the baffle can reflect the image output by the projection optics system onto the user's eye above the baffle. Ultimately, the user sees a virtual image below the transparent baffle. At the same time, the user can observe the cooking process in the pot on the stove through the transparent baffle, thus enhancing the cooking experience.

[0014] In addition, based on the characteristics of virtual images, the projected image can also be designed to interact with the cookware, so that the virtual image coincides with the visual surface of the cookware. As cooking time progresses, visual cues of ingredients or cooking actions are displayed in different areas of the cookware to help users cook.

[0015] The aforementioned virtual image can be a recipe, video footage, etc.

[0016] Preferably, the projection optical system includes:

[0017] Image generation unit used to generate graphics;

[0018] The curved mirror, serving as the output end of the aforementioned projection optical system, receives the image generated by the image generation unit, magnifies the image, and reflects it onto the smoke deflector in the open state. Thus, the curved mirror can alter the light path and magnify the image.

[0019] Preferably, the image generation unit and the curved mirror are both positioned facing forward and arranged one above the other;

[0020] The projection optical system also includes a reflector located in front of the image generation unit, used to reflect the image generated by the image generation unit onto the curved mirror.

[0021] Preferably, the curved mirror is configured to rotate back and forth about a left-right extending axis. This allows the angle of the curved mirror to be adjusted according to the user's height, ensuring the projected image is reflected to the user's eyes.

[0022] Furthermore, the projection optical system is mounted on the fume hood in a manner that allows it to move left and right. This allows the position of the projection optical system to be adjusted according to the cooking conditions of the cookware on the stove (especially a double-burner stove). The position of the projection optical system can also be adjusted according to the user's position.

[0023] Furthermore, it also includes a distance sensor for determining the user's position and a controller connected to the output of the distance sensor. The output of the controller is electrically connected to a drive unit for moving the projection optical system. Thus, the projected image moves accordingly based on the user's movement.

[0024] In the above embodiments, preferably, the front sidewall of the smoke hood is inclined forward from bottom to top; the output end of the projection optical system faces forward and is inclined downward; and the smoke baffle in the open state is inclined downward from back to front. By setting the tilt angle, the user can see the graphic virtual image below the smoke baffle and on the front side of the smoke hood through the smoke baffle, and the graphic virtual image is located above the pot on the stove.

[0025] When a range hood is operating, rising fumes may adhere to the back of the transparent baffle, affecting the user's view of the projected image through the baffle. Therefore, to solve this technical problem, it is preferable to include an air outlet located on the back of the baffle to form an air curtain flowing along the back of the baffle. In this way, the air curtain prevents fumes from contacting the back of the baffle.

[0026] Furthermore, the air outlet is located at the lower edge of the back of the smoke baffle, and the air outlet of the air outlet faces the upper edge of the back of the smoke baffle, so that the airflow can flow upward against the back of the smoke baffle to form an air curtain. In this way, the rising fumes are carried upward by the air curtain before hitting the smoke baffle. The air curtain can prevent the fumes from contacting the back of the smoke baffle and will not blow away the rising fumes. At the same time, the upward-flowing air curtain can also carry the fumes upward and backward and draw them into the smoke inlet of the range hood, improving the smoke extraction effect and preventing the fumes from escaping.

[0027] Furthermore, the air outlet is a strip extending laterally along the lower edge of the back of the smoke baffle, and the air outlets are spaced apart along the length of the air outlet. This ensures the formation of an air curtain.

[0028] Furthermore, the two ends of the air outlet extend in opposite directions to form baffles on the left and right edges of the corresponding smoke baffle. These baffles prevent fumes and airflow from escaping to the left and right.

[0029] In the above scheme, in order to enable the upward-flowing air curtain to smoothly carry some of the oil fumes upward and backward and draw them in from the smoke inlet of the range hood, preferably, a guide strip extending to the left and right and fixed relative to the smoke baffle is provided on the upper edge of the back of the smoke baffle. The guide strip is located above the smoke inlet, and when the smoke baffle is in the open state, the lower surface of the guide strip is horizontally blocked between the back of the smoke baffle and the front side wall of the smoke collection hood.

[0030] The front sidewall of the smoke hood is recessed to form a groove above the smoke inlet, so that the guide strip on the smoke baffle can be inserted when the smoke is closed.

[0031] In this way, the oil fumes carried upward by the air curtain can flow along the site to the smoke inlet under the guidance of the guide strip.

[0032] Furthermore, when the smoke baffle is in the open state, the lower surface of the guide strip is arranged at an obtuse angle to the back of the smoke baffle and the front sidewall of the smoke collection hood. The obtuse angle facilitates the flow of air and reduces resistance to the airflow.

[0033] Furthermore, the front sidewall of the smoke hood has the following components arranged from top to bottom:

[0034] The first region is partially recessed to form a cavity, in which the projection optical system is housed;

[0035] The second region is provided with the aforementioned groove;

[0036] The third region has a greater angle of inclination relative to the vertical plane than the first region has relative to the vertical plane, and the third region is provided with the aforementioned smoke inlet. The upper edge of the third region is the lower edge of the groove opening.

[0037] When the smoke baffle is in the open state, the rear edge of the lower surface of the guide strip is opposite to, adjacent to or abutting the lower edge of the groove opening.

[0038] In this way, the guide strip can direct the airflow that flows upward along the baffle plate to the smoke inlet, preventing the airflow from flowing into the groove and contaminating it. When the range hood stops working, the guide strip can be smoothly stored in the groove through the slot.

[0039] Furthermore, each smoke inlet is vertically shaped and arranged at intervals along the left and right directions.

[0040] Compared with the prior art, the advantages of the present invention are as follows: after the range hood is working and the smoke baffle is open, the smoke baffle can reflect the image output by the output end of the projection optics system onto the user's eye above the smoke baffle. Finally, the user sees a virtual image under the transparent smoke baffle. At the same time, the user can observe the cooking situation in the pot on the stove through the transparent smoke baffle, thus improving the cooking experience.

[0041] In addition, based on the characteristics of virtual images, the projected image can also be designed to interact with the cookware, so that the virtual image coincides with the visual surface of the cookware. As cooking time progresses, visual cues of ingredients or cooking actions are displayed in different areas of the cookware to help users cook. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention (smoke baffle open);

[0043] Figure 2 This is a schematic diagram of the structure from another perspective of an embodiment of the present invention (smoke baffle open);

[0044] Figure 3 This is a cross-sectional view of an embodiment of the present invention (smoke baffle open);

[0045] Figure 4 This is a partial structural diagram of an embodiment of the present invention (smoke baffle open);

[0046] Figure 5 This is a cross-sectional view of the projection optical system according to an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the structure of an embodiment of the present invention (smoke baffle closed);

[0048] Figure 7 This is a cross-sectional view of an embodiment of the present invention (with the smoke baffle closed);

[0049] Figure 8 This is a schematic diagram of the structure of the smoke collection hood according to an embodiment of the present invention;

[0050] Figure 9 This is a usage state diagram of an embodiment of the present invention;

[0051] Figure 10 for Figure 9 The left view. Detailed Implementation

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0053] like Figures 1-10 As shown, this is a preferred embodiment of a range hood according to the present invention. The range hood includes a smoke collection hood 1, a fan hood 6, a smoke baffle 2, a projection optical system 3, an air outlet component 4, and a guide strip 5.

[0054] The smoke hood 1 has a hollow interior forming a smoke collection chamber 10. The front wall of the smoke hood 1 slopes forward from bottom to top and has a first region 11, a second region 12, and a third region 13 arranged sequentially from top to bottom. A portion of the first region 11 is recessed rearward to form a left-right extending cavity 110. The second region 12 is recessed rearward to form a left-right extending groove 100. The third region 13 has a greater angle of inclination relative to the vertical plane than the first region 11, and it has smoke inlets 10a for external smoke to enter the smoke collection chamber 10. Each smoke inlet 10a is vertically shaped and spaced apart in the left-right direction. The upper edge of the third region 13 is the lower edge of the groove 100. See details below. Figure 8 .

[0055] The fan cover 6 is existing technology. It is located on the upper side of the smoke collection hood 1 and the two are connected. The fan cover 6 is equipped with a fan for driving the external oil fumes into the smoke collection hood 1 through the smoke inlet.

[0056] like Figures 3-5 , Figure 7 As shown, the projection optical system 3 is movably disposed within the cavity 110 of the first region 11 under the action of a driving component, and has an output end for outputting graphics, with the output end facing forward and tilted downward. Specifically, the projection optical system 3 includes a housing 30, an image generating unit 31, a curved mirror 32, and a reflector 33. The housing 30 is open at the front and is movably disposed within the cavity 110. The image generating unit 31 is positioned forward and located within the housing 30, and is used to generate graphics. The curved mirror 32, as the output end of the projection optical system 3, is disposed within the housing 30, below the image generating unit 31, and facing forward, in a manner that allows it to rotate back and forth around a left-right extending axis 320. The reflector 33 is located within the housing 30, in front of the image generating unit 31, and is used to reflect the graphics generated by the image generating unit 31 to the curved mirror 32. The curved mirror 32 receives the graphics reflected by the reflector 33, magnifies the graphics, and reflects them to the smoke baffle 2 in the open state.

[0057] In this embodiment, a distance sensor for determining the user's position and a controller connected to the output of the distance sensor (both the controller and the distance sensor are existing technologies and will not be described in detail here) are also included. The output of the controller is electrically connected to a drive unit for moving the projection optical system 3. Thus, the projection optical system 3 can move according to the user's position.

[0058] The aforementioned smoke baffle 2 is rotatably mounted at the smoke inlet 10a to open or close the smoke inlet 10a. In the open state, the smoke baffle 2 is positioned above the third region 13 and below the first region 11, extending forward and tilting downward relative to the front sidewall of the smoke collection hood 1. Simultaneously, the open smoke baffle 2 is made of transparent material and is arranged to reflect the image output from the projection optical system 3 to the position of the user's eye 201 above the smoke baffle 2, allowing the user to see the virtual image 200 of the image below the smoke baffle 2. Please refer to [link to details] for further information. Figure 10 .

[0059] When the range hood is working and the smoke baffle 2 is open, the smoke baffle 2 reflects the image output from the projection optics system 3 onto the user's eye 201 above the smoke baffle 2. Ultimately, the user sees a virtual image 200 below the transparent smoke baffle 2. Simultaneously, the user can observe the cooking process in the pot on the stove through the transparent smoke baffle 2, enhancing the cooking experience. Please refer to [link to details] for further information. Figure 10 .

[0060] The aforementioned air outlet 4 is located at the lower edge of the back of the smoke baffle 2, and the air outlet 40 of the air outlet 4 faces the upper edge of the back of the smoke baffle 2, thereby allowing the airflow to flow upward against the back of the smoke baffle 2 to form an air curtain. Specifically, the air outlet 4 is a strip extending left and right along the lower edge of the back of the smoke baffle 2, and multiple air outlets 40 are arranged at intervals along the length of the air outlet 4. The two ends of the air outlet 4 are respectively bent and extended to form baffles 41 corresponding to the left and right edges of the smoke baffle 2.

[0061] The aforementioned guide strip 5 extends laterally and is positioned at the upper edge of the back side of the smoke baffle 2, allowing it to rotate with the smoke baffle 2. When the smoke baffle 2 is in the open state, the lower surface 51 of the guide strip 5 lies horizontally between the back side of the smoke baffle 2 and the front side wall of the smoke collection hood 1, with the lower surface 51 of the guide strip 5 forming an obtuse angle with both the back side of the smoke baffle 2 and the front side wall of the smoke collection hood 1. Simultaneously, the rear edge of the lower surface 51 of the guide strip 5 is opposite to, adjacent to, or abuts against, the lower edge of the groove opening of the groove 100. When the smoke baffle 2 is in the closed state, the guide strip 5 extends into the groove 100 to retract.

[0062] In this way, when the range hood is working, the rising fumes, before hitting the baffle plate 2, are carried upward and backward by the air curtain blown out by the air outlet 4. They then flow along the lower surface of the guide strip 5 to the vicinity of the smoke inlet, and are finally drawn into the smoke collection hood 1 through the smoke inlet 10a. Throughout this process, the fumes are prevented from contacting the back of the baffle plate 2, and the air curtain helps to carry the fumes upward and backward, drawing them into the range hood through the smoke inlet 10a, thus improving the fume extraction effect and preventing the fumes from escaping.

[0063] The flow direction is as follows Figure 3 As shown by the arrow in the image.

[0064] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A range hood, comprising: A smoke hood (1) has a hollow interior forming a smoke collection chamber (10). The front side wall of the smoke hood (1) is provided with a smoke inlet (10a) for external smoke to enter the smoke collection chamber (10). The smoke baffle (2) is provided at the smoke inlet (10a) in a flip-backward manner to open or close the smoke inlet (10a). In the open state, the smoke baffle (2) is located above the smoke inlet (10a) and extends forward relative to the front side wall of the smoke collection hood (1). Its features It also includes: The projection optical system (3) is located on the smoke hood (1) and above the smoke baffle (2), and has an output terminal for graphic output; Meanwhile, the smoke baffle (2) in the open state is made of transparent material and is arranged to reflect the image output by the output end of the projection optical system (3) to the position of the human eye above the smoke baffle (2), so that the user can see the virtual image of the image below the smoke baffle (2) through the smoke baffle (2).

2. The range hood according to claim 1, characterized in that: The projection optical system (3) includes: Image generation unit (31) for generating graphics; The curved mirror (32), as the output end of the above-mentioned projection optical system (3), is used to receive the image generated by the image generation unit (31), and magnify the image and reflect it to the smoke baffle (2) in the open state.

3. The range hood according to claim 2, characterized in that: The image generation unit (31) and the curved mirror (32) are both arranged facing forward and one above the other; The projection optical system (3) also includes a reflector (33) located in front of the image generation unit (31) for reflecting the image generated by the image generation unit (31) onto the curved mirror (32).

4. The range hood according to claim 3, characterized in that: The curved mirror (32) is arranged in such a way that it can rotate back and forth about the left-right extending axis (320).

5. The range hood according to claim 1, characterized in that: The projection optical system (3) is mounted on the smoke hood (1) in a manner that allows it to move left and right.

6. The range hood according to claim 5, characterized in that: It also includes a distance sensor for determining the user's position and a controller connected to the output of the distance sensor, the output of which is electrically connected to a drive unit for driving the projection optical system (3) to move.

7. The range hood according to any one of claims 1 to 6, characterized in that: The front sidewall of the smoke hood (1) is inclined forward from bottom to top; the output end of the projection optical system (3) is inclined forward and downward; the smoke baffle (2) in the open state is inclined downward from back to front.

8. The range hood according to claim 7, characterized in that: It also includes an air outlet (4) disposed on the back of the smoke baffle (2) to form an air curtain flowing along the back of the smoke baffle (2).

9. The range hood according to claim 8, characterized in that: The air outlet (4) is located at the lower edge of the back of the smoke baffle (2), and the air outlet (40) of the air outlet (4) faces the upper edge of the back of the smoke baffle (2), so that the airflow can adhere to the back of the smoke baffle (2) and flow upward to form an air curtain.

10. The range hood according to claim 9, characterized in that: The air outlet (4) is a strip extending left and right along the lower edge of the back of the smoke baffle (2), and the air outlets (40) are arranged at intervals along the length of the air outlet (4).

11. The range hood according to claim 10, characterized in that: The two ends of the air outlet (4) are respectively bent and extended to form baffles (41) on the left and right edges of the corresponding smoke baffle (2).

12. The range hood according to claim 9, characterized in that: The upper edge of the back of the smoke baffle (2) is provided with a guide strip (5) that extends to the left and right and is fixed relative to the smoke baffle (2). The guide strip (5) is located above the smoke inlet (10a). When the smoke baffle (2) is in the open state, the lower surface (51) of the guide strip (5) is horizontally blocked between the back of the smoke baffle (2) and the front side wall of the smoke collection hood (1). The front side wall of the smoke hood (1) is recessed to form a groove (100) above the smoke inlet (10a) so that the guide strip (5) on the smoke baffle (2) in the closed state can be inserted.

13. The range hood according to claim 12, characterized in that: When the smoke baffle (2) is in the open state, the lower surface (51) of the guide strip (5) is arranged at an obtuse angle with the back of the smoke baffle (2) and the front side wall of the smoke collection hood (1).

14. The range hood according to claim 12, characterized in that: The front sidewall of the smoke hood (1) has the following features arranged from top to bottom: The first region (11) is partially recessed to form a cavity (110) for the projection optical system (3) to be disposed therein; The second region (12) is provided with the aforementioned groove (100); The third region (13) has a greater tilt angle relative to the vertical plane than the first region (11) has a greater tilt angle relative to the vertical plane, and the third region (13) is provided with the above-mentioned smoke inlet (10a). The upper edge of the third region (13) is the lower edge of the groove (100). When the smoke baffle (2) is in the open state, the rear edge of the lower surface (51) of the guide strip (5) is opposite to, adjacent to or abutting the lower edge of the groove (100).

15. The range hood according to claim 14, characterized in that: Each smoke inlet (10a) is vertically shaped and arranged at intervals along the left and right directions.

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