Range hood

Abstract

The invention relates to a range hood, which comprises an exhaust fume collecting hood, an exhaust fume collecting cavity, an exhaust fume outlet, an exhaust fume outlet, a smoke outlet and an exhaust fume outlet, and is characterized in that the interior of the exhaust fume collecting hood is hollow to form an exhaust fume collecting cavity, and the front side wall of the exhaust fume collecting hood is provided with an exhaust fume inlet; the smoke baffle is arranged at the smoke inlet in a front-back overturning mode so as to open or close the smoke inlet, and in the open state, the smoke baffle is located above the smoke inlet and extends forwards relative to the front side wall of the smoke collecting hood; the projection optical system is arranged on the smoke collecting hood and above the smoke barrier and is provided with an output end for outputting a graph; meanwhile, the smoke barrier in the open state is made of a transparent material and is arranged to be capable of reflecting the pattern output by the output end of the projection optical system to the position where the human eyes above the smoke barrier are located, and therefore a user can see the virtual image of the pattern below the smoke barrier through the smoke barrier. According to the invention, the user can watch the picture and also can consider the cooking condition in the cookware.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to a range hood. Background Art

[0002] Existing range hoods rely on the operation of the internal fan system to form a negative pressure zone. The oil smoke airflow in the kitchen passes through the range hood under the action of atmospheric pressure and is discharged outdoors. In order to prevent oil smoke from escaping, a movable smoke baffle is generally provided at the smoke inlet of the range hood. For example, the Chinese invention patent application "Smoke baffle drive system, smoke baffle drive method, range hood, storage medium" with application number 202310804283.4 and application publication number CN116734301A has a smoke baffle drive system connected to the smoke baffle, including a motor; a transmission mechanism connected between the motor and the smoke baffle, capable of converting the rotation of the motor into a swinging motion to drive the smoke baffle; a hydraulic system connected to the transmission mechanism, used to provide resistance to the transmission mechanism to adjust the driving speed of the smoke baffle.

[0003] Another example is the Chinese utility model patent "Ranger Hood" with patent number 202322365018.9 and authorization announcement number CN220541189U, which includes: a casing, on which a first air inlet is provided; a smoke baffle, which is connected to the casing in a manner of rotation and / or translation relative to the casing, and can open and close the first air inlet; an air inlet cavity, which is arranged inside and outside the casing, and is connected to the casing in a manner of being able to move up and down relative to the casing, and a second air inlet is provided on the air inlet cavity; it also includes a motion mechanism, which has a first power output end connected to the smoke baffle and a second power output end connected to the air inlet cavity; driven by the motion mechanism, the smoke baffle can slide back and forth along the front side wall of the casing, and at the same time deflect up and down along the axis extending left and right to open and close the first air inlet, and the air inlet cavity can move up and down relative to the casing to open and close the second air inlet.

[0004] The design of the smoke baffle can effectively intercept rising oil smoke and reduce the risk of oil smoke escaping, but at the same time, the smoke baffle when opened is horizontally blocked between the user's eyes and the pot, affecting the user's observation of the cooking conditions in the pot.

[0005] At the same time, some range hoods currently have a display screen on the front side for displaying electronic recipes and other images, such as the Chinese invention patent "A Range Hood" with application number CN202010031763.8 and authorization announcement number CN111023221B. Since the display screen is located above the smoke baffle, the user cannot watch the cooking situation 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 in view of the current status of the prior art, so that a user can view the screen while taking into account the cooking situation in the pot.

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

[0008] A smoke collecting hood is hollow inside to form a smoke collecting cavity, and a front side wall of the smoke collecting hood is provided with a smoke inlet for external smoke to enter the smoke collecting cavity;

[0009] A smoke baffle is disposed at the smoke inlet and can be flipped forward and backward 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 collecting hood.

[0010] It is characterized by also including:

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

[0012] At the same time, the smoke shield 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 to the position of the human eye above the smoke shield, so that the user can see the virtual image of the image below the smoke shield through the smoke shield.

[0013] In this way, when the range hood is working and the smoke damper is opened, the smoke damper can reflect the graphics output by the output end of the projection optical system to the user's eyes above the smoke damper. Finally, the user sees the virtual image under the transparent smoke damper. At the same time, the user can observe the cooking situation in the pot on the stove through the transparent smoke damper, thereby improving the cooking experience.

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

[0015] The virtual image may be a recipe, a video screen, etc.

[0016] Preferably, the projection optical system comprises:

[0017] An image generation unit for generating graphics;

[0018] The curved mirror, as the output end of the projection optical system, is used to receive the image generated by the image generation unit, and amplify the image and reflect it to the smoke shield in the open state. Thus, the curved mirror can change the light path and amplify the image.

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

[0020] The projection optical system further comprises a reflecting mirror, which is arranged at the front side of the image generating unit and is used for reflecting the image generated by the image generating unit to the curved mirror.

[0021] Preferably, the curved mirror is arranged in a manner that it can rotate forward and backward around an axis extending left and right. In this way, the angle of the curved mirror can be adjusted according to the height of the user so that the projected image can be reflected to the user's eyes.

[0022] Furthermore, the projection optical system is arranged on the fume collecting hood in a manner that it can move left and right. In this way, the position of the projection optical system can be adjusted according to the cooking conditions of the pot on the stove (especially the double-burner stove). The position of the projection optical system can also be adjusted according to the position of the user.

[0023] Furthermore, it also includes a distance sensor for determining the user's position, a controller connected to the output end of the distance sensor, and the output end of the controller is electrically connected to a driving member for driving the projection optical system to move. In this way, the projection image can move according to the movement of the user.

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

[0025] When the range hood is working, the rising oil smoke may adhere to the back of the transparent smoke shield and affect the user's viewing of the projected image through the smoke shield. Therefore, in order to solve this technical problem, preferably, it also includes an air outlet, which is arranged on the back of the smoke shield to form an air curtain flowing along the back of the smoke shield. In this way, the air curtain can prevent the oil smoke from contacting the back of the smoke shield.

[0026] Furthermore, the air outlet is arranged at the lower edge of the back side of the smoke shield, and the air outlet of the air outlet faces the upper edge of the back side of the smoke shield, so that the airflow can flow upward along the back side of the smoke shield to form a wind curtain. In this way, the oil smoke will be carried upward by the wind curtain before it hits the smoke shield. The wind curtain can prevent the oil smoke from contacting the back side of the smoke shield, and the wind curtain will not blow away the rising oil smoke. At the same time, the upward flowing wind curtain can also drive the oil smoke to flow upward and backward and be sucked from the smoke inlet of the range hood, thereby improving the oil smoke suction effect and preventing the oil smoke from escaping.

[0027] Furthermore, the air outlet piece is in the shape of a strip extending left and right along the lower edge of the back side of the smoke shield, and the air outlets are arranged on the air outlet piece at intervals along the length direction, thereby ensuring the formation of an air curtain.

[0028] Furthermore, the two ends of the air outlet are respectively bent and extended to form baffles arranged at the left and right edges of the corresponding smoke baffles. The baffles can prevent the oil smoke and the airflow blown out of the air outlet from escaping to the left and right sides.

[0029] In the above scheme, in order to enable the upwardly flowing wind curtain to smoothly drive part of the oil smoke to flow upward and backward and be sucked from the smoke inlet of the range hood, preferably, a guide strip extending left and right and fixed relative to the smoke shield is provided at the upper side edge of the back side of the smoke shield, and the guide strip is located above the smoke inlet, and when the smoke shield is in the open state, the lower surface of the guide strip is horizontally blocked between the back side of the smoke shield and the front side wall of the smoke hood;

[0030] The front side wall of the smoke collecting hood is partially recessed above the smoke inlet to form a groove for the guide strip on the smoke baffle in the closed state to be inserted.

[0031] In this way, the oil smoke carried upward by the wind 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 an open state, the lower surface of the guide strip is arranged at an obtuse angle with the back surface of the smoke baffle and the front side wall of the smoke collecting hood. The obtuse angle is conducive to the flow of airflow and reduces the resistance to airflow.

[0033] Furthermore, the front side wall of the smoke hood has the following components arranged in sequence from top to bottom:

[0034] The first area is partially recessed backward to form a cavity for arranging the projection optical system therein;

[0035] The second area is provided with the above-mentioned groove;

[0036] A third region, wherein the inclination angle of the third region relative to the vertical plane is greater than the inclination angle of the first region relative to the vertical plane, and the third region is provided with the above-mentioned smoke inlet, and the upper edge of the third region is the lower edge of the notch of the groove;

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

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

[0039] Furthermore, each smoke inlet is in the shape of a vertical bar and is arranged at intervals along the left-right direction.

[0040] Compared with the prior art, the advantage of the present invention is that after the range hood is working and the smoke shield is opened, the smoke shield can reflect the graphics output by the output end of the projection optical system to the user's eyes above the smoke shield, and finally the user sees a virtual image under the transparent smoke shield. At the same time, the user can observe the cooking situation in the pot on the stove through the transparent smoke shield, thereby improving the cooking experience.

[0041] In addition, based on the characteristics of the virtual image, the projection screen can also be designed to interact with the cookware so that the virtual image overlaps with the visual surface of the cookware. As the cooking time goes by, visual cues of ingredients or cooking actions are displayed in different areas of the pot to help users cook. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of an embodiment of the present invention (the smoke baffle is opened);

[0043] Figure 2 It is a structural schematic diagram of an embodiment of the present invention from another viewing angle (the smoke baffle is opened);

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

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

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

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

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

[0049] Figure 8 A schematic structural diagram of a smoke collecting hood according to an embodiment of the present invention;

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

[0051] Fig.10 for Fig. 9 Left view of . DETAILED DESCRIPTION

[0052] The present invention is further described in detail below with reference to the accompanying drawings.

[0053] like Figures 1 to 10 As shown, a preferred embodiment of a range hood of the present invention is shown, and the range hood comprises a smoke collecting hood 1, a fan cover 6, a smoke baffle 2, a projection optical system 3, an air outlet member 4 and a guide strip 5.

[0054] Among them, the smoke hood 1 has a hollow interior to form a smoke collecting chamber 10, and the front side wall of the smoke hood 1 is inclined forward from bottom to top, and has a first area 11, a second area 12 and a third area 13 arranged in sequence from top to bottom. The first area 11 is partially recessed backward to form a cavity 110 extending left and right. The second area 12 is recessed backward to form a groove 100 extending left and right. The inclination angle of the third area 13 relative to the vertical plane is greater than the inclination angle of the first area 11 relative to the vertical plane, and the third area 13 is provided with a smoke inlet 10a for external smoke to enter the smoke collecting chamber 10, and each smoke inlet 10a is in the shape of a vertical bar and is arranged at intervals in the left and right directions. At the same time, the upper edge of the third area 13 is the lower edge of the notch of the groove 100. Please refer to the detailed description. Figure 8 .

[0055] The fan cover 6 is a prior art, which is arranged on the upper side of the smoke collecting hood 1, and the two are connected. A fan is arranged in the fan cover 6 for driving the external oil smoke to be sucked into the smoke collecting hood 1 through the smoke inlet.

[0056] like Figures 3 to 5 , Figure 7 As shown, the projection optical system 3 is disposed in the concave cavity 110 of the first area 11 so as to be movable left and right under the action of a driving member, and has an output end for outputting a pattern, and the output end faces forward and is 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 front side of the housing 30 is open, and it is disposed in the concave cavity 110 so as to be movable left and right. The image generating unit 31 is disposed forward and located in the housing 30, and is used to generate a pattern. The curved mirror 32, as the output end of the projection optical system 3, is disposed in the housing 30, below the image generating unit 31, and is disposed forward in a manner that it can rotate forward and backward around an axis 320 extending left and right. The reflector 33 is located in the housing 30, in front of the image generating unit 31, and is used to reflect the pattern generated by the image generating unit 31 to the curved mirror 32. The curved mirror 32 receives the pattern reflected by the reflector 33, and amplifies the pattern and reflects it to the smoke baffle 2 in the open state.

[0057] At the same time, in this embodiment, a distance sensor for determining the user's position and a controller connected to the output end of the distance sensor are also included (the controller and the distance sensor are both prior art and are not described in detail here), and the output end of the controller is electrically connected to a driving member for driving the projection optical system 3 to move. In this way, the projection optical system 3 can move according to the user's position.

[0058] The smoke baffle 2 can be turned back and forth and arranged at the smoke inlet 10a to open or close the smoke inlet 10a. In the open state, the smoke baffle 2 is located above the third area 13 and below the first area 11, and extends forward relative to the front side wall of the smoke hood 1 and tilts downward. At the same time, 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 201 above the smoke baffle 2, so that the user can see the virtual image 200 of the image below the smoke baffle 2 through the smoke baffle 2. For details, please refer to Fig.10 .

[0059] When the range hood is working and the smoke damper 2 is opened, the smoke damper 2 can reflect the image outputted from the output end of the projection optical system 3 to the user's human eye 201 above the smoke damper 2, and finally the user sees the virtual image 200 below the transparent smoke damper 2. At the same time, the user can observe the cooking situation in the pot on the stove through the transparent smoke damper 2, which improves the cooking experience. Fig.10 .

[0060] The air outlet member 4 is arranged at the lower edge of the back side of the smoke shield 2, and the air outlet 40 of the air outlet member 4 faces the upper edge of the back side of the smoke shield 2, so that the airflow can flow upward along the back side of the smoke shield 2 to form a wind curtain. Specifically, the air outlet member 4 is in the shape of a strip extending left and right along the lower edge of the back side of the smoke shield 2, and a plurality of air outlets 40 are arranged on the air outlet member 4 at intervals along the length direction. The two ends of the air outlet member 4 are respectively folded and extended to form a barrier strip 41 arranged corresponding to the left and right edges of the smoke shield 2.

[0061] The guide strip 5 extends left and right and is arranged at the upper edge of the back of the smoke baffle 2 so as 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 is horizontally blocked between the back of the smoke baffle 2 and the front side wall of the smoke hood 1, and the lower surface 51 of the guide strip 5 and the back of the smoke baffle 2 and the front side wall of the smoke hood 1 are arranged at an obtuse angle. At the same time, the rear edge of the lower surface 51 of the guide strip 5 is opposite to, adjacent to or in contact with the lower edge of the notch of the groove 100. When the smoke baffle 2 is in the closed state, the guide strip 5 extends into the groove 100 to achieve folding.

[0062] In this way, when the range hood is working, the oil smoke will be carried upward and backward by the wind curtain blown out by the air outlet 4 before it hits the smoke baffle 2, and then flow along the lower surface of the guide strip 5 to the vicinity of the smoke inlet, and finally be sucked into the smoke hood 1 from the smoke inlet 10a. During the whole process, the oil smoke can be prevented from contacting the back of the smoke baffle 2, and can be driven to flow upward and backward and be sucked from the smoke inlet 10a of the range hood, thereby improving the oil smoke suction effect and preventing the oil smoke from escaping.

[0063] The flow direction is Figure 3 As indicated by the arrow in .

[0064] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A range hood, comprising: A smoke collecting hood (1) having a hollow interior forming a smoke collecting chamber (10), and a front side wall of the smoke collecting hood (1) is provided with a smoke inlet (10a) for allowing external smoke to enter the smoke collecting chamber (10); A smoke baffle (2) is disposed at the smoke inlet (10a) and can be flipped forward and backward 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 collecting hood (1); Features Also included are: A projection optical system (3) is arranged on the smoke collecting hood (1) and above the smoke baffle (2), and has an output end for outputting graphics; At the same time, the smoke shield (2) in the open state is made of a transparent material and is arranged to reflect the graphics output by the output end of the projection optical system (3) to the position of the human eye above the smoke shield (2), so that the user can see the virtual image of the graphics below the smoke shield (2) through the smoke shield (2).

2. The range hood according to claim 1, characterized in that: The projection optical system (3) comprises: An image generation unit (31) for generating graphics; The curved mirror (32) serves as the output end of the projection optical system (3) and is used to receive the image generated by the image generation unit (31), and to amplify the image and reflect it to the smoke shield (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 forward and one above the other; The projection optical system (3) also includes a reflecting mirror (33) disposed on the front side of the image generating unit (31) and used for reflecting the image generated by the image generating unit (31) to the curved mirror (32).

4. The range hood according to claim 3, characterized in that: The curved mirror (32) is arranged in a manner that it can rotate forward and backward around an axis (320) extending left and right.

5. The range hood according to claim 1, characterized in that: The projection optical system (3) is arranged on the smoke collecting hood (1) in a manner capable of being moved leftward and rightward.

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 end of the distance sensor, wherein the output end of the controller is electrically connected to a driving member 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 side wall of the smoke collecting hood (1) is inclined forward from bottom to top; the output end of the projection optical system (3) is inclined forward and downward; and 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 member (4) which is arranged on the back side of the smoke shield (2) and is used to form an air curtain flowing along the back side of the smoke shield (2).

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

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

11. The range hood according to claim 10, characterized in that: The two ends of the air outlet member (4) are respectively folded and extended to form blocking strips (41) arranged corresponding to the left and right side edges of the smoke baffle plate (2).

12. The range hood according to claim 9, characterized in that: A guide strip (5) extending leftward and rightward and fixed relative to the smoke shield (2) is provided at the upper edge of the back side of the smoke shield (2); the guide strip (5) is located above the smoke inlet (10a); and when the smoke shield (2) is in an open state, the lower surface (51) of the guide strip (5) is horizontally blocked between the back side of the smoke shield (2) and the front side wall of the smoke collecting hood (1); The front side wall of the smoke collecting hood (1) is partially recessed above the smoke inlet (10a) to form a groove (100) for the guide strip (5) on the smoke baffle (2) in a closed state to be inserted.

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

14. The range hood according to claim 12, characterized in that: The front side wall of the smoke collecting hood (1) has the following components arranged in sequence from top to bottom: A first area (11) partially recessed backwards to form a cavity (110) for arranging the projection optical system (3) therein; The second area (12) is provided with the above-mentioned groove (100); a third region (13), wherein the inclination angle of the third region (13) relative to the vertical plane is greater than the inclination angle of the first region (11) relative to the vertical plane, and the third region (13) is provided with the above-mentioned smoke inlet (10a), and the upper edge of the third region (13) is the lower edge of the notch of the groove (100); When the smoke baffle (2) is in an open state, the rear edge of the lower surface (51) of the guide strip (5) is opposite to, adjacent to or in contact with the lower edge of the notch of the groove (100).

15. The range hood according to claim 14, characterized in that: Each smoke inlet (10a) is in the shape of a vertical bar and is arranged at intervals in the left-right direction.

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