Range hood

Abstract

The utility model relates to a range hood which comprises a smoke box, the outer wall of the smoke box is provided with a smoke inlet face and a smoke box back plate used for being connected with a wall surface, and the smoke inlet face is located on the right side of the smoke box back plate and is obliquely arranged relative to the smoke box back plate; a guide surface is arranged on the outer wall of the convex edge, and the convex edge is arranged at the edge of the top of the smoke inlet surface, so that the edge of the guide surface is connected with the edge of the top of the smoke inlet surface; the fan frame is mounted at the top of the smoke box, and a fan frame back plate used for being connected with a wall surface is arranged on the edge of the left side of the fan frame; the smoke baffle is provided with a first rotating axis, and the first rotating axis is located in the protruding edge and is coplanar with the smoke inlet face.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil stain cleaning, especially relates to a range hood. BACKGROUND

[0002] For some oil fume exhausters with rotatable baffle, the rotation shaft of the baffle is located at the top edge of the baffle and the top edge of the smoke suction surface. When the baffle is closed, the baffle is attached to the smoke suction surface to achieve the shielding of the smoke suction surface. When the baffle is opened, the smoke suction surface and the baffle form a smoke suction area, and the smoke is sucked into the smoke box through the smoke suction area and then discharged from the fan frame at the top of the smoke box.

[0003] The smoke box is fixed to the wall surface through the smoke box back plate, and the fan frame is fixed to the wall surface through the fan frame back plate. In order to ensure the smoke suction range, the bottom edge of the baffle needs to be located on the side away from the wall surface of the fan frame when the baffle is opened.

[0004] On the other hand, the lightness and thinness of the oil fume exhauster is a main research and development direction at present, that is, to reduce the distance between the top edge of the smoke suction surface and the smoke box back plate. With the aggravation of the lightness and thinness of the oil fume exhauster, the bottom edge of the baffle is also closer and closer to the smoke box back plate when the baffle is opened, resulting in the reduction of the effective smoke suction range of the oil fume exhauster. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide an oil fume exhauster for the problem that the lightness and thinness of the oil fume exhauster and the effective smoke suction range cannot be considered.

[0006] An oil fume exhauster comprises:

[0007] A smoke box, wherein an outer wall of the smoke box is provided with a smoke inlet surface and a smoke box back plate for connecting to a wall surface, the smoke inlet surface is located on the right side of the smoke box back plate and is inclined relative to the smoke box back plate, the distance between the bottom edge of the smoke inlet surface and the smoke box back plate is L2, and the distance between the top edge of the smoke inlet surface and the smoke box back plate is L3;

[0008] A convex edge, wherein an outer wall of the convex edge is provided with a guide surface, the convex edge is arranged at the top edge of the smoke inlet surface, so that the edge of the guide surface is connected to the top edge of the smoke inlet surface, and the included angle between the guide surface and the smoke box back plate is α;

[0009] A fan frame, wherein the fan frame is installed at the top of the smoke box, the left side edge of the fan frame is provided with a fan frame back plate for connecting to a wall surface, and the distance between the right side edge of the fan frame and the fan frame back plate is L1, wherein L1>L3; and

[0010] A smoke baffle, a width of the smoke baffle is L, the smoke baffle has a first rotation axis, the first rotation axis is located in the convex edge and is coplanar with the smoke inlet face, a spacing between the first rotation axis and a top edge of the smoke inlet face is r, the smoke baffle is arranged on the smoke box by rotating around the first rotation axis to switch between a shielding state and an unfolded state;

[0011] When the smoke baffle is in the shielding state, the smoke baffle is attached to the smoke inlet face, and a top edge of the smoke baffle is located at a top edge of the smoke inlet face;

[0012] When the smoke baffle is in the unfolded state, the top edge of the smoke baffle is in contact with a middle of the guide face to form a guide space surrounded by the smoke inlet face, the guide face and the smoke baffle, and an included angle between the smoke baffle and the smoke inlet face is θ;

[0013] Wherein, L2+2×(r+L)×sin(θ / 2)×sinα>L1.

[0014] The smoke exhaustor further comprises a lighting lamp, the lighting lamp is arranged at the guide face, and when the smoke baffle is in the unfolded state, the lighting lamp is at least partially located in the guide space.

[0015] The guide face is provided with a avoiding slot, and the lighting lamp is located in the avoiding slot.

[0016] The outer wall of the avoiding slot opening and the guide face are located in the same plane.

[0017] A partition plate is arranged between the bottom wall of the avoiding slot and the lighting lamp.

[0018] The smoke exhaustor satisfies 70°≤α≤85°.

[0019] The spacing between the top edge and the bottom edge of the smoke inlet face is equal to the width of the smoke baffle.

[0020] The included angle between the back plate of the smoke box and the smoke inlet face is 30°-60°.

[0021] When the smoke baffle is in the unfolded state, the bottom edge of the smoke baffle is higher than the bottom edge of the smoke inlet face.

[0022] The smoke exhaustor satisfies L3+2×r×sin(θ / 2)×sinα>L1.

[0023] The smoke exhaustor has the following beneficial effects:

[0024] 1. The distance between the right side edge of the fan frame and the back plate of the fan frame is L1, and the distance between the top edge of the smoke inlet surface and the back plate of the smoke box is L3. By setting L1 to be greater than L3, the requirements of the range hood for thinning are met.

[0025] 2. By setting a convex edge on the top of the smoke inlet surface and setting the first rotation axis of the smoke baffle within the convex edge, the horizontal displacement of the smoke baffle during rotation is expanded, thereby increasing the range of the guide space.

[0026] 3. The projection distance between the back plate of the smoke box and the back plate of the fan frame in the left-right direction is small or zero. Under the condition of L2+2×(r+L)×sin(θ / 2)×sinα>L1, the bottom edge of the smoke baffle is located on the side of the fan frame away from the wall in the unfolded state. In addition, the outer wall between the bottom edge of the smoke inlet surface and the back plate of the smoke box can also guide the flue gas into the guide space. Therefore, compared with the traditional thin range hood, the range hood of the utility model has sufficient flue gas suction range. The increase of the flue gas suction range can reduce the air flow rate per unit area, thereby reducing the working noise of the range hood. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a perspective view of the range hood in Embodiment 1 of the utility model (the smoke baffle is in the shielding state);

[0028] Figure 2 FIG. 2 is a front view of the range hood in Embodiment 1 of the utility model (the smoke baffle is in the shielding state);

[0029] Figure 3 FIG. 3 is a front view of the range hood in Embodiment 1 of the utility model (the smoke baffle is in the shielding state);

[0030] Figure 4 FIG. 4 is a partial enlarged view of the range hood in Embodiment 1 of the utility model; Figure 3

[0031] Figure 5 FIG. 5 is a front view of the range hood in Embodiment 1 of the utility model (the smoke baffle is in the unfolded state);

[0032] Figure 6 FIG. 6 is a front view of the range hood in Embodiment 1 of the utility model (the smoke baffle is in the unfolded state);

[0033] Figure 7 FIG. 7 is a partial enlarged view of the range hood in Embodiment 1 of the utility model; Figure 6

[0034] Figure 8 FIG. 8 is a perspective view of the range hood in Embodiment 1 of the utility model (the smoke baffle is in the unfolded state).​​

[0035] Reference signs:

[0036] 100, guide space; 1, smoke box; 11, smoke inlet surface; 12, air outlet surface; 13, smoke box back plate; 2, convex edge; 21, guide surface; 211, avoiding groove; 3, smoke baffle; 4, lighting lamp; 5, fan frame; 51, fan frame back plate. DETAILED DESCRIPTION

[0037] In order to make the above objectives, characteristics and advantages of the present application more apparent, concrete embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a comprehensive understanding of the present application. However, the present application can be implemented in many other different ways than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0040] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and are not the only embodiment.

[0043] Embodiment 1:

[0044] Referring to Figures 1-8 The present embodiment provides a range hood, comprising a smoke box 1, a convex edge 2, a fan frame 5 and a smoke baffle 3.

[0045] The outer wall of the smoke box 1 is provided with a smoke box back plate 13 and a smoke inlet surface 11. The smoke box back plate 13 is perpendicular to the horizontal plane to be fixed with the wall surface. The smoke inlet surface 11 is located on the right side of the smoke box back plate 13 and is inclined relative to the smoke box back plate 13. Commonly, the included angle between the smoke box back plate 13 and the smoke inlet surface 11 is 30°-60°. The distance between the top edge of the smoke inlet surface 11 and the smoke box back plate 13 is L3, and the distance between the bottom edge of the smoke inlet surface 11 and the smoke box back plate 13 is L2, wherein L3>L2.

[0046] A fan is arranged in the smoke box 1, and the smoke inlet surface 11 and the fan are communicated. The top of the smoke box 1 is provided with an air outlet surface 12, which is generally parallel to the horizontal plane. The fan frame 5 is arranged on the air outlet surface 12, and the fan frame 5 is communicated with the inside of the smoke box 1 to blow air upward at the fan frame 5. The left side edge of the fan frame 5 is provided with a fan frame back plate 51 for connecting the wall surface, and the fan frame back plate 51 is parallel to the smoke box back plate 13 or located in the same plane. If the fan frame back plate 51 is parallel to the smoke box back plate 13, the projection distance between the two in the left-right direction is very small. The distance between the right side edge of the fan frame 5 and the fan frame back plate 51 is L1, wherein L1>L3, so as to meet the requirement of thinning of the smoke box 1.

[0047] The outer wall of the convex edge 2 is provided with a guide surface 21, and the convex edge 2 is arranged at the top edge of the smoke inlet surface 11, so that the edge of the guide surface 21 is connected with the top edge of the smoke inlet surface 11. The guide surface 21 is a plane, and the guide surface 21 is arranged obliquely relative to the smoke inlet surface 11. The included angle between the guide surface 21 and the back plate 13 of the smoke box is α, and the right edge of the guide surface 21 is higher than the left edge. Generally, 70°≤α≤85°.

[0048] The smoke baffle 3 has a shielding state and an unfolded state, and the smoke baffle 3 also has a first rotation axis. The smoke baffle 3 is arranged on the smoke box 1 by rotating around the first rotation axis to switch between the shielding state and the unfolded state. As shown in Figure 7 , the first rotation axis is located in the convex edge 2 and is coplanar with the smoke inlet surface 11. In addition, the first rotation axis passes through point A and is parallel to the back plate 13 of the smoke box. The distance between the first rotation axis and the top edge of the smoke inlet surface 11 is r.

[0049] Referring to Figures 1-4 , when the smoke baffle 3 is in the shielding state, the fan in the smoke box 1 stops working at this time. The smoke baffle 3 is attached to the smoke inlet surface 11, and the top edge of the smoke baffle 3 is located at the top edge of the smoke inlet surface 11. The bottom edge of the smoke baffle 3 is located at the bottom edge of the smoke inlet surface 11. The distance between the top edge and the bottom edge of the smoke inlet surface 11 is equal to the width L of the smoke baffle 3, so that the smoke baffle 3 fully shields the smoke inlet surface 11, and also avoids the waste of the smoke baffle 3. After the smoke baffle 3 is attached to the smoke inlet surface 11, it can avoid the smoke baffle 3 occupying too much space.

[0050] Referring to Figures 5-7When the smoke baffle 3 is in the unfolded state, the top edge of the smoke baffle 3 is in contact with the middle of the guide surface 21 (including any of the middle, the left middle, and the right middle), and the distance between the top edge of the smoke baffle 3 and the back plate 13 of the smoke box is smaller than the distance between the bottom edge of the smoke baffle 3 and the back plate 13 of the smoke box. Thus, the guide space 100 is formed by the smoke inlet surface 11, the guide surface 21, and the smoke baffle 3, and the angle between the smoke baffle 3 and the smoke inlet surface 11 is θ. Since the smoke baffle 3 rotates around the first rotation axis, the distance between the first rotation axis and the bottom edge of the smoke baffle 3 is a constant value L+r. Thus, when the smoke baffle 3 is in the unfolded state, the distance between the top edge of the smoke baffle 3 and the first rotation axis is also r, that is, the first rotation axis, the top edge of the smoke inlet surface 11, and the top edge of the smoke baffle 3 form an isosceles triangle with an apex angle θ, and the first rotation axis, the bottom edge of the smoke inlet surface 11, and the bottom edge of the smoke baffle 3 also form an isosceles triangle with an apex angle θ. The two isosceles triangles are similar, and thus the plane formed by the bottom edge of the smoke inlet surface 11 and the bottom edge of the smoke baffle 3 is parallel to the guide surface 21. Correspondingly, the angle between the plane formed by the bottom edge of the smoke inlet surface 11 and the bottom edge of the smoke baffle 3 and the back plate 13 of the smoke box is also α. The distance between the top edge of the smoke inlet surface 11 and the top edge of the smoke baffle 3 is 2×r×sin(θ / 2), and according to the similarity of the two isosceles triangles, the distance between the bottom edge of the smoke inlet surface 11 and the bottom edge of the smoke baffle 3 is L5=2×(r+L)×sin(θ / 2), and correspondingly, the projection distance of the bottom edge of the smoke inlet surface 11 and the bottom edge of the smoke baffle 3 in the left-right direction is L4=2×(r+L)×sin(θ / 2)×sinα. It can be easily understood that the outer wall between the bottom edge of the smoke inlet surface 11 and the back plate 13 of the smoke box can guide the smoke into the guide space 100, and thus the projection distance of the effective guiding range of the smoke in the left-right direction is actually L2+L4. As long as L2+L4>L1, that is, L2+2×(r+L)×sin(θ / 2)×sinα>L1, the smoke box 1 can absorb the smoke in a large enough range.

[0051] When the smoke baffle 3 is in the unfolded state, the projection distance of the top edge of the smoke inlet surface 11 and the top edge of the smoke baffle 3 in the left-right direction is L6=2×r×sin(θ / 2)×sinα. In order to further improve the space of the guide space 100, L3+L6>L1, that is, L3+2×r×sin(θ / 2)×sinα>L1.

[0052] When the smoke baffle 3 is in the unfolded state, the bottom edge of the smoke baffle 3 is higher than the bottom edge of the smoke inlet surface 11, thereby reducing the obstruction of the smoke baffle 3 to the line of sight.

[0053] The fan power is constant, so the total air flow per unit time at the smoke inlet surface 11 is constant. The improvement of the smoke suction range can not only improve the performance of the range hood in removing oil fume, but also reduce the air flow rate per unit area, thereby reducing the noise of the range hood.

[0054] The range hood also comprises a lighting lamp 4, which is arranged at the guide surface 21. When the smoke baffle 3 is in the shielding state, the smoke baffle 3 can avoid the lighting lamp 4, and the lighting lamp 4 can normally illuminate the cooking bench. When the smoke baffle 3 is in the unfolded state, the lighting lamp 4 is at least partially located in the guide space 100, and the smoke baffle 3 can also at least partially avoid the lighting lamp 4, thereby allowing the lighting lamp 4 to illuminate the cooking bench below the guide space 100.

[0055] In addition, when the smoke baffle 3 is in the unfolded state, the smoke inlet surface 11 is located between the cooking bench and the lighting lamp 4 in the vertical direction of the horizontal plane. Therefore, most of the smoke in the guide space 100 is directly absorbed by the smoke inlet surface 11 before reaching the lighting lamp 4, and only a small part of the smoke reaches the lighting lamp 4 and then flows to the smoke inlet surface 11 for secondary absorption. As can be seen, the accumulation of oil stains at the lighting lamp 4 in the embodiment is low, and the lighting lamp 4 can maintain good illumination effect for a long time.

[0056] Preferably, the guide surface 21 is provided with an avoidance groove 211, and the lighting lamp 4 is located in the avoidance groove 211, so as to avoid the lighting lamp 4 protruding outward from the guide surface 21, thereby preventing the lighting lamp 4 from interfering with the top edge of the smoke baffle 3 during the rotation of the smoke baffle 3, and allowing the smoke baffle 3 to smoothly switch between the unfolded state and the shielding state.

[0057] Further preferably, the outer wall of the lighting lamp 4 at the opening of the avoidance groove 211 and the guide surface 21 are located in the same plane, so as to avoid the formation of a step between the outer wall of the lighting lamp 4 at the opening of the avoidance groove 211 and the guide surface 21, and to reduce the accumulation of dirt.

[0058] The bottom wall of the avoidance groove 211 needs to be wired to supply power to the lighting lamp 4. In order to prevent oil stains from polluting the circuit, a partition is arranged between the bottom wall of the avoidance groove 211 and the lighting lamp 4.

[0059] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as within the scope of the present disclosure.

[0060] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A range hood characterized by, The range hood comprises: a smoke box (1) provided with a smoke inlet face (11) and a smoke box back plate (13) for connecting a wall, the smoke inlet face (11) being located at the right side of the smoke box back plate (13) and being obliquely arranged relative to the smoke box back plate (13), the distance between the bottom edge of the smoke inlet face (11) and the smoke box back plate (13) being L2, and the distance between the top edge of the smoke inlet face (11) and the smoke box back plate (13) being L3; a convex edge (2) provided with a guide face (21) at the outer wall thereof, the convex edge (2) being arranged at the top edge of the smoke inlet face (11) so that the edge of the guide face (21) is connected with the top edge of the smoke inlet face (11), and the included angle between the guide face (21) and the smoke box back plate (13) being α; a fan frame (5) mounted on the top of the smoke box (1), the left side edge of the fan frame (5) being provided with a fan frame back plate (51) for connecting a wall, and the distance between the right side edge of the fan frame (5) and the fan frame back plate (51) being L1, wherein L1>L3; and a smoke baffle (3) having a width of L, the smoke baffle (3) having a first rotation axis located in the convex edge (2) and being coplanar with the smoke inlet face (11), the distance between the first rotation axis and the top edge of the smoke inlet face (11) being r, the smoke baffle (3) being arranged on the smoke box (1) by rotating around the first rotation axis to switch between a shielding state and an unfolded state; when the smoke baffle (3) is in the shielding state, the smoke baffle (3) is attached to the smoke inlet face (11), and the top edge of the smoke baffle (3) is located at the top edge of the smoke inlet face (11); when the smoke baffle (3) is in the unfolded state, the top edge of the smoke baffle (3) is in contact with the middle of the guide face (21), so that the smoke inlet face (11), the guide face (21) and the smoke baffle (3) form a guide space (100), and the included angle between the smoke baffle (3) and the smoke inlet face (11) being θ; wherein L2+2×(r+L)×sin(θ / 2)×sinα>L1.

2. The hood according to claim 1, characterized in that, The range hood further comprises a lighting lamp (4) arranged at the guide face (21), when the smoke baffle (3) is in the unfolded state, the lighting lamp (4) is at least partially located in the guide space (100).

3. The hood according to claim 2, characterized in that, The guide face (21) is provided with a avoiding slot (211), and the lighting lamp (4) is located in the avoiding slot (211).

4. The hood according to claim 3, characterized in that, The outer wall of the avoiding slot (211) at the opening thereof and the guide face (21) are located in the same plane.

5. The hood according to claim 3, characterized in that, A partition plate is arranged between the bottom wall of the avoiding slot (211) and the lighting lamp (4).

6. The hood according to claim 1, characterized in that, 70°≤α≤85°。 7. The hood according to claim 1, characterized in that, The distance between the top edge and the bottom edge of the smoke inlet face (11) is equal to the width of the smoke baffle (3).

8. The hood according to claim 1, characterized in that, The angle between the smoke box back plate (13) and the smoke inlet face (11) is 30-60 degrees.

9. The hood according to claim 1, characterized in that, When the smoke baffle (3) is in the unfolded state, the bottom edge of the smoke baffle (3) is higher than the bottom edge of the smoke inlet face (11).

10. The hood according to claim 1, characterized in that, L3+2×r×sin(θ / 2)×sinα>L1.

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