Range hood

Abstract

The utility model discloses a range hood which comprises a box body and a smoke baffle assembly, the smoke baffle assembly comprises a first smoke baffle and a second smoke baffle, the first smoke baffle covers the front face of the box body and covers at least part of an air inlet when being located at a first position, and a first included angle alpha is formed between the first smoke baffle and the front face of the box body when being located at a second position; the second smoke baffle covers the front face of the box body when being located at the third position and is arranged below the first smoke baffle, and a second included angle beta is formed between the second smoke baffle and the front face of the box body when being located at the fourth position; in the second state, the first smoke barrier, the second smoke barrier and the front face of the box body form a smoke gathering cavity, the smoke gathering cavity comprises a first part between the first smoke barrier and the front face of the box body and a second part between the second smoke barrier and the front face of the box body, the opening width of the first part is d1, and the opening width of the second part is d2; all the parameters meet the following relations: beta is greater than alpha, and d2 is greater than d1; at least 5% of the total area of the air inlets corresponds to the second portion.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. A range hood generally includes a housing, a fan system, and a smoke baffle. For example, a range hood disclosed in Chinese patent application number 202020176183.3 includes a housing provided with a main air inlet, an air suction device installed on the housing, and an oil cup arranged at the bottom of the housing. The housing is also provided with an auxiliary air inlet spaced apart from the main air inlet, and a panel capable of opening and closing the auxiliary air inlet is pivotally connected to the housing. The auxiliary air inlet includes a plurality of second mesh holes arranged in an array. In order to enable the air inlet to cover a larger area, the entire front panel is designed to be flippable to form a thin range hood with a light and thin appearance. However, this type of range hood has the following problems: 1. In order to prevent the panel from blocking the view when the range hood is working and to avoid the problem of pot hitting, the panel needs to be flipped open at a certain angle. However, controlling the flipping angle will result in a smaller smoke collection area of the range hood and a poor oil fume extraction effect; 2. In order to improve the oil fume extraction effect, when the flipping angle of the panel is increased, the distance between the smoke shield and the person becomes smaller, which blocks the view and gives the customer a sense of oppression.

[0003] In order to solve the above technical problems, the Chinese utility model patent application with application number CN202121082332.0 (authorization announcement number: CN215863591U) discloses a range hood, comprising a housing, an air inlet formed on the front side of the housing, and a smoke baffle assembly capable of opening or closing the air inlet provided on the front side of the housing, characterized in that the smoke baffle assembly comprises a first smoke baffle and a second smoke baffle arranged up and down, the first smoke baffle being rotatably connected to the housing and the second smoke baffle respectively, and the rotation axes of the first smoke baffle and the second smoke baffle extending in the left and right directions. By providing two smoke baffles rotatably connected to each other, the movement trajectory of oil smoke after entering the smoke collection area can be effectively improved. While increasing the smoke collection area, the curve of oil smoke entering the air inlet is made smoother, which can effectively improve the oil smoke extraction effect. After the range hood is turned on, the distance between the overall unit and the user becomes larger, and the risk of blocking the line of sight becomes smaller.

[0004] However, the above-mentioned range hood with a two-stage smoke baffle assembly still has certain shortcomings. After the smoke baffle assembly is finally opened, its second smoke baffle is basically in a vertical state or has a relatively small tilt angle. In this way, although the problem of hitting the pot and blocking the view is avoided, when the oil smoke rises rapidly, the purpose of collecting the smoke cannot be achieved due to the excessively small opening tilt angle of the second smoke baffle, resulting in the problem of oil smoke escaping in some cooking scenarios. For example, when the food or water is just put into the pot, the amount of oil smoke is large and rises quickly. Since the smoke collection area is relatively small, the rising oil smoke on the edge of the pot away from the wall will easily escape in a short time after the food is put into the pot. For example, when the wok is lifted away from the stove, the pot is away from the center of the stove, and the edge of the pot away from the wall will exceed the lower edge of the second smoke baffle. When the suction power of the range hood is insufficient, smoke is also likely to escape.

[0005] Therefore, existing range hoods also need further improvement. Utility Model Content

[0006] The technical problem to be solved by the present invention is to provide a range hood in view of the deficiencies in the above-mentioned prior art, which can increase the smoke collecting area as much as possible when the smoke baffle assembly is in the open state, thereby reducing the escape of oil smoke.

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

[0008] A box body, a fan system is arranged inside the box body, the box body has a front face, and the front face of the box body has an air inlet; and

[0009] A smoke shield assembly having a first state and a second state; the smoke shield assembly includes a first smoke shield and a second smoke shield, wherein in the first state, the first smoke shield is located in a first position and the second smoke shield is located in a third position; and in the second state, the first smoke shield is located in a second position and the second smoke shield is located in a fourth position.

[0010] The first smoke shield is connected to the box body. When in the first position, the first smoke shield covers the front of the box body and covers at least a portion of the air inlet. When in the second position, the first smoke shield is open relative to the box body and forms a first angle α with the front of the box body.

[0011] The second smoke shield is connected to the first smoke shield. When in the third position, the second smoke shield covers the front of the box and is arranged below the first smoke shield. When in the fourth position, a second angle β is formed between the second smoke shield and the front of the box.

[0012] In the second state, the first smoke shield, the second smoke shield, and the front of the box form a smoke-collecting cavity, the smoke-collecting cavity including a first portion formed between the first smoke shield and the front of the box, and a second portion formed between the second smoke shield and the front of the box, the opening width of the lower end of the first portion being d1, and the opening width of the lower end of the second portion being d2;

[0013] Its characteristics are:

[0014] The above α and β satisfy the following relationship: β>α, and the above d1 and d2 satisfy the following relationship: d2>d1;

[0015] At least 5% of the total area of the air inlet corresponds to the second portion.

[0016] When the smoke baffle assembly is in the open state, the opening angle β of the second smoke baffle is greater than the opening angle α of the first smoke baffle, and the lower edge of the second smoke baffle can extend forward as far as possible, thereby increasing the smoke collection range and reducing the problem of oil smoke escape; and because the opening angle of the second smoke baffle is large, the second part of the smoke collection cavity formed between it and the front of the box body provides a larger smoke collection space, and at least 5% of the total area of the air inlet corresponds to the second part. The corresponding part can generate negative pressure in the second part and make the second part have a larger opening width, thereby allowing most of the rising oil smoke to be collected in the second part, further reducing the escape of oil smoke.

[0017] Preferably, in order to further enable the second portion to provide a larger smoke-collecting range, the above-mentioned d1 and d2 also satisfy the following relationship: d2≥2d1.

[0018] Preferably, in order to further enable the second portion to provide a larger smoke-collecting range, the above-mentioned α and β also satisfy the following relationship: α>20°, β>75°.

[0019] Furthermore, the length of the first smoke shield is L1, the length of the second smoke shield is L2, and L1≥1.5L2, and L2≥0.3L1;

[0020] When the smoke baffle assembly is in its second state, when projected onto a vertical plane, the projected height of the first smoke baffle is L3, and the projected height of the second smoke baffle is L4, with L4 / L3 ≤ 0.2. Thus, L2 meets a certain length, allowing the lower portion of the smoke-collecting cavity, i.e., the portion corresponding to the second smoke baffle, to have a larger smoke-collecting space to accommodate more smoke and reduce smoke escape. When the smoke baffle assembly is in its second, open state, the height space it occupies is smaller, making it less likely to cause a pot-smashing problem. Furthermore, the projected height is controlled within a reasonable range, ensuring that the second portion corresponding to the second smoke baffle provides a larger smoke-collecting range.

[0021] Furthermore, the housing has a bottom, on which a guide surface is disposed. When the smoke baffle assembly is in the second state, the guide surface extends within the range of the second smoke baffle. Thus, compared to solutions in which the guide surface extends below the smoke collection chamber, the guide surface of this solution guides the smoke into the second portion of the smoke collection chamber. Since the second portion has negative pressure, this negative pressure can be used to draw the smoke in, thereby reducing the escape of the smoke.

[0022] Furthermore, the second smoke deflector is divided into a first section and a second section of equal length. When the smoke deflector assembly is in the second state, the second section is located further outward, and the guide surface, when projected onto the plane of the second smoke deflector, falls within the range defined by the second section. The second section of the second smoke deflector is positioned further outward and downward, primarily serving to trap smoke. The space formed by the second section and the front of the housing is larger than the space formed by the first section and the front of the housing. Therefore, the flow velocity in the space corresponding to the second section is lower than the flow velocity in the space corresponding to the first section. The guide surface directs the oil smoke into the space corresponding to the second section, minimizing the impact of airflow counteraction and reducing flow losses.

[0023] Furthermore, an oil cup is provided at the bottom of the box body, and an inclined surface is provided at a position adjacent to the oil cup and the guide surface. The inclined surface and the guide surface extend in the same direction. Thus, the oil cup can also be used to constitute a part of the guide to form a larger surface for guiding the flow of oil smoke, thereby improving the guide effect and allowing it to better enter the corresponding space of the second section.

[0024] Preferably, when the smoke shield assembly is in the second state, when projected onto a vertical plane, the projected height of the first portion is H1, the projected height of the air inlet within the first portion is H2, and H2 / H1 is greater than 0.5, 0.55, 0.6, or 0.65. The projected height of the air inlet occupies a significant portion of the projected height of the first portion, providing direct suction to a majority of the area along the height direction of the first portion, thereby prompting oil smoke in this area to be drawn into the air inlet as quickly as possible, thereby improving the oil smoke extraction effect.

[0025] Preferably, when the smoke shield assembly is projected onto a vertical plane, the vertical distance from the upper end point of the air inlet to the upper end point of the first portion is H3, and the ratio H3 / H1 is less than 0.3, 0.25, or 0.2. This reduces the smoke-collecting space above the upper end of the air inlet, thereby reducing the accumulation of smoke in this space and preventing the formation of vortices that interfere with the inhalation of smoke. Furthermore, at this smaller distance, smoke above the upper end of the air inlet is more easily drawn into the air inlet.

[0026] Preferably, when the smoke shield assembly is in the second state, when projected onto a vertical plane, the projected height of the second portion is H4, the projected height of the air inlet within the second portion is H5, and H5 / H4 is greater than 0.1. The air inlet portion within the second portion occupies a certain height ratio, providing direct suction to the area of the second portion facing the depth of the range hood, thereby improving the range hood extraction effect.

[0027] The second technical solution adopted by the present invention to solve the above technical problems is: a range hood, characterized in that it includes:

[0028] A box body, a fan system is arranged inside the box body, the box body has a front face, and the front face of the box body is provided with an air inlet; and

[0029] A smoke shield assembly having a first state and a second state; the smoke shield assembly includes a first smoke shield and a second smoke shield, wherein in the first state, the first smoke shield is located in a first position and the second smoke shield is located in a third position; and in the second state, the first smoke shield is located in a second position and the second smoke shield is located in a fourth position.

[0030] The first smoke shield is connected to the box body. When in the first position, the first smoke shield covers the front of the box body and covers at least a portion of the air inlet. When in the second position, the first smoke shield is open relative to the box body and forms a first angle α with the front of the box body.

[0031] The second smoke shield is connected to the first smoke shield. When in the third position, the second smoke shield covers the front of the box and is arranged below the first smoke shield. When in the fourth position, a second angle β is formed between the second smoke shield and the front of the box.

[0032] In the second state, the first smoke shield, the second smoke shield, and the front of the box form a smoke-collecting cavity, the smoke-collecting cavity including a first portion formed between the first smoke shield and the front of the box, and a second portion formed between the second smoke shield and the front of the box, the opening width of the lower end of the first portion being d1, and the opening width of the lower end of the second portion being d2;

[0033] The above α and β satisfy the following relationship: β>α, and the above d1 and d2 satisfy the following relationship: d2>d1;

[0034] at least 5% of the total area of the air inlet corresponds to the second portion;

[0035] The above d1 and d2 also satisfy the following relationship: d2 ≥ 2d1;

[0036] The above α and β also satisfy the following relationship: α>20°, β>75°;

[0037] The length of the first smoke shield is L1, the length of the second smoke shield is L2, and L1 ≥ 1.5L2, and L2 ≥ 0.3L1;

[0038] When the smoke shield assembly is in the second state, when the smoke shield assembly is projected onto a vertical plane, the projected height of the first smoke shield is L3, the projected height of the second smoke shield is L4, and L4 / L3≤0.2 is satisfied;

[0039] The box body has a bottom, and a guide surface is provided on the bottom. When the smoke baffle assembly is in the second state, the extension direction of the guide surface falls within the range of the second smoke baffle;

[0040] The second smoke shield is divided into a first section and a second section of equal length. When the smoke shield assembly is in the second state, the second section is located further outward, and when the guide surface is projected onto the plane where the second smoke shield is located, it falls within the range defined by the second section.

[0041] When the smoke shield assembly is in the second state, when the smoke shield assembly is projected onto a vertical plane, the projected height of the first portion is H1, the projected height of the air inlet located in the first portion is H2, and H2 / H1 is greater than 0.5, 0.55, 0.6 or 0.65;

[0042] When the smoke baffle assembly is projected onto a vertical plane, a vertical distance from the upper end point of the air inlet to the upper end point of the first part is H3, and a ratio of H3 / H1 is less than 0.3, 0.25 or 0.2.

[0043] An oil cup is provided at the bottom of the box body, and an inclined surface is provided at a position adjacent to the oil cup and the guide surface. The inclined surface and the guide surface extend in the same direction. Therefore, the oil cup can also be used to constitute a part of the guide to form a larger surface for guiding the flow of oil smoke, thereby improving the guide effect and allowing it to better enter the space corresponding to the second section.

[0044] When the smoke shield assembly is in its second position, when projected onto a vertical plane, the projected height of the second portion is H4, and the projected height of the air inlet within the second portion is H5, with H5 / H4 being greater than 0.1. The air inlet portion within the second portion occupies a certain height ratio, providing direct suction to the area of the second portion facing the depth of the range hood, thereby improving the range hood extraction effect.

[0045] Compared with the prior art, the advantages of the present invention are:

[0046] 1) When the smoke baffle assembly is in the open state, the opening angle β of the second smoke baffle is greater than the opening angle α of the first smoke baffle, and the lower edge of the second smoke baffle can extend forward as far as possible, thereby increasing the smoke collection range and reducing the problem of oil smoke escape; and because the opening angle of the second smoke baffle is large, the second part of the smoke collection cavity formed between it and the front of the box body provides a larger smoke collection space, and at least 5% of the total area of the air inlet corresponds to the second part. The corresponding part can generate negative pressure in the second part, and the second part has a larger opening width, thereby most of the rising oil smoke can be collected in the second part, further reducing the escape of oil smoke.

[0047] 2) The length of the second smoke damper is smaller than that of the first smoke damper. When the smoke damper assembly is in the second open state, the projected height of the second smoke damper is much smaller than that of the first smoke damper. The height space occupied by the second smoke damper is smaller, so the problem of hitting the pot is less likely to occur. The projected height is controlled within a reasonable range to ensure that the second part corresponding to the second smoke damper provides a larger smoke-collecting range. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a schematic diagram of the three-dimensional structure of the range hood according to the first embodiment of the present invention (the smoke baffle assembly is in the open state);

[0049] Figure 2 This is a left side view of the range hood of the first embodiment of the present utility model (the smoke baffle assembly is in a state of opening, the first smoke baffle and the second smoke baffle are opened at the same angle, and part of the housing is hidden);

[0050] Figure 3 This is a left side view of the range hood of the first embodiment of the utility model (the smoke baffle assembly is in the open state, hiding part of the box);

[0051] Figure 4 This is a schematic diagram of the three-dimensional structure of the range hood according to the first embodiment of the present utility model (the smoke baffle assembly is in the open state, partially hiding the housing);

[0052] Figure 5 This is a right side view of the range hood according to the first embodiment of the present utility model (the smoke baffle assembly is in the open state);

[0053] Figure 6 This is a front view of a hidden smoke baffle assembly of a range hood according to a first embodiment of the utility model;

[0054] Figure 7 This is a front view of the range hood according to the first embodiment of the present invention (the smoke baffle assembly is in a closed state);

[0055] Figure 8This is a side view of the range hood according to the first embodiment of the present invention (the smoke baffle assembly is in a closed state);

[0056] Figure 9 This is a front view of a range hood according to a second embodiment of the present invention (the smoke baffle assembly is in a closed state);

[0057] Figure 10 This is a schematic diagram of the three-dimensional structure of a range hood according to a second embodiment of the present invention (the smoke baffle assembly is in an open state);

[0058] Figure 11 This is a right side view of the range hood according to the second embodiment of the present invention (the smoke baffle assembly is in the open state);

[0059] Figure 12 This is a right side sectional view of the range hood according to the second embodiment of the present invention (the smoke baffle assembly is in the open state). DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the embodiments described are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this utility model.

[0061] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or server that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0062] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0063] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0064] The term "and / or" herein simply describes an association relationship between associated objects, indicating that three relationships can exist. For example, "A and / or B" can represent the existence of three situations: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" herein refers to any combination of at least two of any one or more of a plurality of items. For example, "at least one of A, B, and C" can represent any one or more elements selected from the set consisting of A, B, and C.

[0065] The specific angles, heights, widths and other values given in the specific embodiments below are all measured accordingly with respect to the specific drawings.

[0066] In addition, numerous specific details are provided in the following detailed description to better illustrate the present disclosure. Those skilled in the art will appreciate that the present disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main points of the present disclosure.

[0067] Example 1

[0068] Figures 1 to 8 A preferred embodiment of the present invention is shown, in which the range hood includes a housing 10, a fan system 60 and a smoke baffle assembly. The fan system 60 is arranged in the housing 10, and generally adopts a centrifugal fan. The housing 10 includes a front panel 11, a rear side wall 12, a left side wall (not shown), a right side wall (not shown), a bottom plate (not shown) and a top plate 13, and the front panel 11 and the rear side wall 12 are opposite in the front-to-back direction. The front panel 11 is basically arranged vertically, and an air inlet 110 is opened on it, and an air inlet port 601 of the fan system 60 arranged in the housing 10 (not shown in this embodiment, for this feature, please refer to the second embodiment) Figure 12 ) is opposite to the air inlet 110 on the front panel 11. The plane where the periphery of the front side surface of the front panel 11 is located is defined as the front face 111 of the housing 10. The front face 111 is a vertical plane (in a normal installation state), and the air inlet 110 is provided on the front face 111.

[0069] The housing 10 has a bottom with a guide surface 14 disposed thereon. The guide surface 14 is located at the front of the entire bottom and gradually slopes downward from front to back. The rear side of the bottom plate of the housing 10 is also provided with an oil cup 61 extending left and right. The oil cup 61 is used to collect oil stains dripping from the housing. The rear end of the guide surface 14 is located above the oil cup 61 so that the oil stains on the guide surface 14 can enter the oil cup 61. The guide surface 14 is used to guide the oil smoke upward. The oil cup 61 is provided with an inclined surface 611, which is located at the front of the entire oil cup 61 and adjacent to the guide surface 14. The inclined surface 611 and the guide surface 14 extend in the same direction, that is, they both slope gradually downward from front to back. The same direction here means that the angle between the inclined surface 611 and the guide surface 14 is less than 5°, so that the inclined surface 611 cooperates with the guide surface 14 to form a larger guide area.

[0070] See also Figure 1 and Figure 7 The smoke damper assembly is disposed at the front of the housing 10 and specifically includes a first smoke damper 21 and a second smoke damper 22, arranged sequentially from top to bottom. The first smoke damper 21 is connected to the housing 10, such that its top is pivotally connected to the housing 10, while the second smoke damper 22 is pivotally connected to the lower portion of the first smoke damper 21. Specifically, the first smoke damper 21 is pivotally connected to the top plate 13 of the housing 10 about an axis extending left and right as its rotational center, while the second smoke damper 22 is connected to the first smoke damper 21, such that its upper edge is pivotally connected to the lower edge of the first smoke damper 21. When the smoke damper assembly is in the closed state, the first smoke damper 21 and the second smoke damper 22 both extend vertically, thereby forming a complete smoke damper that covers the front panel 11 of the housing 10 and simultaneously closes the air inlet 110 on the front panel 11.

[0071] See also Figure 3 A third mounting bracket 33 is provided on the bottom wall of the top plate 13 of the housing 10 (i.e., the side wall facing the interior of the housing 10). A generally arcuate connecting arm 36 is provided on the back of the first smoke deflector 21, adjacent to its upper edge. The first end of this connecting arm is connected to the back of the first smoke deflector 21, and the second end is rotatably connected to the third mounting bracket 33 via pins extending left and right. Specifically, a first mounting bracket 31 is provided on the back of the first smoke deflector 21, and the first end of this connecting arm is connected to the first mounting bracket 31.

[0072] A fourth mounting bracket 34 is also provided on the back of the first smoke deflector 21. This fourth mounting bracket 34 has a first connecting plate extending to the lower edge of the first smoke deflector 21. A fifth mounting bracket 35 is also provided on the back of the second smoke deflector 22. This fifth mounting bracket 35 has a second connecting plate extending to the upper edge of the second smoke deflector 22. The first connecting plate and the second connecting plate are pivotally connected via pins extending left and right, and the position of the pivotal connection between the two corresponds to the position where the lower edge of the first smoke deflector 21 and the upper edge of the second smoke deflector 22 meet. Furthermore, to ensure the reliability of the pivotal connection between the first and second smoke deflectors 21, 22, this embodiment includes two fourth mounting brackets 34, and two fifth mounting brackets 35, respectively, arranged in the left and right directions.

[0073] The housing 10 is also equipped with an electric push rod 40 (also known as a driving member). Driven by the electric push rod 40, the smoke damper assembly moves closer to and further from the front panel 11 of the housing 10, thereby opening the air inlet 110 on the front panel 11. The main body of the electric push rod 40 is mounted to the rear side wall 12 of the housing 10 via a hinged seat 42, allowing it to be deflected upward or downward. The electric push rod 40 includes a telescopic rod 41 that can move linearly. This telescopic rod 41 passes through the front panel 11 and is pivotally connected to the back of the second smoke damper 22. Specifically, the electric push rod 40 is mounted on the housing 10 to the left or right to avoid interference with the main air inlet area of the front smoke damper.

[0074] A second mounting bracket 32 is further provided on the back of the second smoke baffle 22 , wherein the end of the telescopic rod 41 of the electric push rod 40 is rotatably connected to the second mounting bracket 32 , and the axis of relative rotation between the two extends in the left-right direction.

[0075] A stopper is also provided between the housing 10 and the first smoke deflector 21 to limit the opening angle of the first smoke deflector 21 relative to the housing 10. Specifically, the stopper includes a first connecting rod 51 and a second connecting rod 52. The first end of the first connecting rod 51 is pivotally connected to the bottom wall of the top plate 13 of the housing 10, and the second end is pivotally connected to the first end of the second connecting rod 52. The second end of the second connecting rod 52 is pivotally connected to the first mounting bracket 31. The rotation axes of the first connecting rod 51 relative to the housing 10, the first connecting rod 51 relative to the second connecting rod 52, and the second connecting rod 52 relative to the first smoke deflector 21 all extend in the left-right direction. To simplify the installation structure, the second connecting rod 52 is pivotally connected to a pin that pivotally connects the fourth mounting bracket 34 of the first smoke deflector 21 and the fifth mounting bracket 35 of the second smoke deflector 22.

[0076] A damper is provided between the first and second smoke deflectors 21, 22. Specifically, the damper is preferably a spring 70, the first end of which is connected to the first mounting bracket 31 on the back of the first smoke deflector 21, and the second end to the second mounting bracket 32 on the back of the second smoke deflector 22. When the smoke deflector assembly is in the closed position with the front panel 11 of the housing 10 closed, the first and second smoke deflectors 21, 22 extend in the same plane. At this point, the spring 70 is in a natural or slightly stretched state. Thus, driven by the driver, the first and second smoke deflectors 21, 22 can deflect forward together at the same angle.

[0077] The working process of the smoke baffle assembly of the range hood of this embodiment is as follows:

[0078] The electric push rod 40 is started and the telescopic rod 41 is extended. Under the action of the damping member, the first smoke deflector 21 and the second smoke deflector 22 can be deflected forward together. After the two are deflected to the set angle, the first smoke deflector 21 can be maintained at the set angle under the action of the limit member (that is, it cannot continue to open forward), and the second smoke deflector 22 can continue to deflect forward and open to a larger deflection angle relative to the first smoke deflector 21 under the drive of the electric push rod 40. Since the first smoke deflector 21 is limited to a relatively small opening angle, during the process of the second smoke deflector 22 continuing to open, the rotation radius of its lower edge is relatively small (the entire smoke deflector in the prior art) and is away from the cookware, so that the problem of hitting the cookware will not occur. On this basis, the lower edge of the second smoke deflector 22 can also be extended forward as much as possible, thereby increasing the smoke collection area and reducing the problem of oil smoke escape.

[0079] As can be seen from the above, the smoke shield assembly has a first state and a second state. In the first state (closed state), see Figure 7 and Figure 8 , the first smoke baffle 21 is in the first position, the second smoke baffle 22 is in the third position, in the second state (open state), see Figure 5 , the first smoke shield 21 is located at the second position, and the second smoke shield 22 is located at the fourth position. Figure 7 and Figure 8 When the first smoke shield 21 is in the first position, it covers the front face 111 of the box body 10 and covers at least a portion of the air inlet 110. At the same time, the second smoke shield 21 is in the third position, it covers the front face 111 of the box body 10 and is disposed below the first smoke shield 21. Figure 5When the first smoke baffle 21 is in the second position, it is open relative to the housing 10 and forms a first angle α with the front face 111 of the housing 10 (when measuring, the angle between the front or back face of the first smoke baffle 21 and the front face 111 of the housing 10 is measured on the side view of the range hood). Meanwhile, when the second smoke baffle 22 is in the fourth position, it is open relative to the housing 10 and forms a second angle β with the front face 111 of the housing 10 (when measuring, the angle between the front or back face of the second smoke baffle 22 and the front face 111 of the housing 10 is measured on the side view of the range hood), and β>α is satisfied. Optionally, α>20° and β>75°.

[0080] In the second state, the first smoke baffle 21, the second smoke baffle 22 and the front face 111 of the box body 10 form a smoke collecting chamber, which includes a first portion Q1 formed between the first smoke baffle 21 and the front face 111 of the box body 10 and a second portion Q2 formed between the second smoke baffle 22 and the front face 111 of the box body 10, and at least 5% of the total area of the air inlet 110 corresponds to the second portion Q2.

[0081] Example 2

[0082] Figures 9 to 12 Another preferred embodiment of the present invention is shown. This embodiment differs from the first embodiment in that the length of the first smoke baffle 21 is L1, and the length of the second smoke baffle 22 is L2, satisfying the conditions L1 ≥ 1.5L2 and L2 ≥ 0.3L1. The length here refers to the vertical distance between the upper and lower ends of each smoke baffle. L2 meets a certain length, allowing the lower portion of the smoke-collecting cavity, corresponding to the second smoke baffle 22, to have a larger smoke-collecting space, thereby accommodating more oil smoke and reducing oil smoke escape.

[0083] See also Figure 11 and Figure 12 The following description will be made in conjunction with the side view of the second state. In the second state, the first smoke deflector 21, when projected horizontally onto a vertical surface (in any vertical direction, preferably the front surface 111), has a projected height of L3. The second smoke deflector 22, when projected horizontally onto the same vertical surface, has a projected height of L4, and the relationship L4 / L3 ≤ 0.2 is satisfied. Therefore, in the second state, the second smoke deflector 22 occupies a small height space, is less likely to cause damage, and provides a relatively large smoke-collecting range.

[0084] The opening width at the lower end of the first portion Q1 (the horizontal distance between the lower end of the first smoke baffle 21 and the front face 111 of the housing 10) is d1, and the opening width at the lower end of the second portion Q2 (the horizontal distance between the lower end of the second smoke baffle 22 and the front face 111 of the housing 10) is d2, satisfying d2>d1. More preferably, d2≥2d1. Because β>α, the second portion Q2 provides a larger smoke-collecting space. By ensuring that at least 5% of the area of the air inlet 110 corresponds to the second portion Q2, a negative pressure is generated in the second portion Q2. This prevents smoke from escaping easily when the second portion Q2 has a larger opening width. Similarly, in the second state, the projection height of the first part Q1 projected horizontally onto a vertical plane (a vertical plane in any direction, preferably the front side 111) is H1, and the projection height of the air inlet 110 in the first part Q1 on the same vertical plane is H2, and H2 / H1 is greater than 0.5, 0.55, 0.6 or 0.65. This can provide direct suction to most areas in the height direction of the first part Q1, thereby improving the oil fume absorption effect. On the projection of a vertical plane (a vertical plane in any direction, preferably the front side 111), the vertical distance from the upper end point of the air inlet 110 (if there is only one air inlet 110, the upper end point 110 is the highest point or the highest point of this air inlet 110; if the air inlet 110 is composed of multiple openings, the highest point or the highest point of the opening constitutes the upper end point 110) to the upper end point of the first part Q1 is H3, and H3 / H1 is less than 0.3, 0.25 or 0.2. Therefore, the upper end of the air inlet 110 has a smaller distance from the upper end of the first part Q1, and the smoke gathering space above the upper end of the air inlet 110 is reduced, thereby reducing the gathering of oil smoke in this area, and at this smaller distance, the oil smoke above is also more easily inhaled by the air inlet 110. On the projection of a vertical plane (a vertical plane in any direction, preferably the front side 111), the projection height of the second part Q2 is H4, and the projection height of the air inlet 110 located in the second part Q2 is H5. H5 / H4 is greater than 0.1, which can provide direct suction to the area of the second part Q2 toward the depth direction of the range hood (the projection direction of the second part Q2), thereby improving the oil fume extraction effect.

[0085] In addition, in the second state, the extension direction of the guide surface 14 falls within the range of the second smoke baffle 22, that is, the plane where the guide surface 14 is located intersects with the second smoke baffle 22 (see Figure 12 The dotted line N in the figure shows the plane where the guide surface 14 is located. The oil smoke guided by the guide surface 14 can enter the second part Q2 of the smoke collecting chamber. Since the second part Q2 has a negative pressure, the oil smoke can be reduced from escaping. The second smoke baffle 22 is divided into a first section 221 and a second section 222 of equal length ( Figure 11(Bounded by the dotted line M in the middle), in the second state, the second section 222 is located at a further outer side (further away from the front face 111), and when the guide surface 14 is projected onto the plane where the second smoke baffle 22 is located, it falls within the range defined by the second section 222. The second section 222 mainly plays the role of gathering smoke, and the space formed by the second section 222 and the front face 111 of the box body 10 has a flow rate smaller than that formed by the first section 221 and the front face 111. The guide surface 14 guides the air here, and the airflow counter-attack has a smaller impact, thereby reducing flow losses.

[0086] The "fluid communication" referred to in the present invention refers to the spatial positional relationship between two components or parts (hereinafter collectively referred to as the first part and the second part), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path and / or be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A range hood comprising: A box (10) is provided with a fan system (60) therein, the box (10) has a front face (111), and an air inlet (110) is provided on the front face (111) of the box (10); and A smoke shield assembly has a first state and a second state; the smoke shield assembly comprises a first smoke shield (21) and a second smoke shield (22); in the first state, the first smoke shield (21) is located at a first position, and the second smoke shield (22) is located at a third position; in the second state, the first smoke shield (21) is located at a second position, and the second smoke shield (22) is located at a fourth position; The first smoke shield (21) is connected to the box body (10). When in the first position, the first smoke shield (21) covers the front surface (111) of the box body (10) and covers at least a portion of the air inlet (110). When in the second position, the first smoke shield (21) is open relative to the box body (10) and forms a first angle α with the front surface (111) of the box body (10). The second smoke shield (22) is connected to the first smoke shield (21). When in the third position, the second smoke shield (22) covers the front surface (111) of the box body (10) and is arranged below the first smoke shield (21). When in the fourth position, a second angle β is formed between the second smoke shield (22) and the front surface (111) of the box body (10). In the second state, the first smoke shield (21), the second smoke shield (22) and the front surface (111) of the box body (10) form a smoke collecting chamber, the smoke collecting chamber comprising a first portion (Q1) formed between the first smoke shield (21) and the front surface (111) of the box body (10) and a second portion (Q2) formed between the second smoke shield (22) and the front surface (111) of the box body (10), the opening width of the lower end of the first portion (Q1) being d1, and the opening width of the lower end of the second portion (Q2) being d2; Its characteristics are: The above α and β satisfy the following relationship: β>α, and the above d1 and d2 satisfy the following relationship: d2>d1; At least 5% of the total area of the air inlet (110) corresponds to the second portion (Q2).

2. The range hood according to claim 1, characterized in that: The above d1 and d2 also satisfy the following relationship: d2≥2d1.

3. The range hood according to claim 1, wherein: The above-mentioned α and β also satisfy the following relationship: α>20°, β>75°.

4. The range hood according to claim 1, wherein: The length of the first smoke shield (21) is L1, the length of the second smoke shield (22) is L2, and L1≥1.5L2, and L2≥0.3L1; When the smoke shield assembly is in the second state, when the smoke shield assembly is projected onto a vertical plane, the projection height of the first smoke shield (21) is L3, the projection height of the second smoke shield (22) is L4, and L4 / L3≤0.2 is satisfied.

5. The range hood according to claim 1, characterized in that: The box body (10) has a bottom, and a guide surface (14) is provided on the bottom. When the smoke baffle assembly is in the second state, the extension direction of the guide surface (14) falls within the range of the second smoke baffle (22).

6. The range hood according to claim 5, characterized in that: The second smoke baffle (22) is divided into a first section (221) and a second section (222) of equal length. When the smoke baffle assembly is in the second state, the second section (222) is located further outward, and when the guide surface (14) is projected onto the plane where the second smoke baffle (22) is located, it falls within the range defined by the second section (222).

7. The range hood according to claim 5, characterized in that: An oil cup (61) is provided at the bottom of the box body (10), and a slope (611) is provided at a position adjacent to the guide surface (14) of the oil cup (61), and the slope (611) and the guide surface (14) extend in the same direction.

8. The range hood according to claim 1, characterized in that: When the smoke shield assembly is in the second state, when the smoke shield assembly is projected onto a vertical plane, the projected height of the first portion (Q1) is H1, the projected height of the air inlet (110) located in the first portion (Q1) is H2, and H2 / H1 is greater than 0.5, 0.55, 0.6 or 0.

65.

9. The range hood according to claim 8, characterized in that: When the smoke shield assembly is projected onto a vertical plane, the vertical distance from the upper end point of the air inlet (110) to the upper end point of the first part (Q1) is H3, and the ratio H3 / H1 is less than 0.3, 0.25 or 0.

2.

10. The range hood according to claim 1, characterized in that: When the smoke shield assembly is in the second state, when the smoke shield assembly is projected onto a vertical plane, the projected height of the second portion (Q2) is H4, the projected height of the air inlet (110) located in the second portion (Q2) is H5, and H5 / H4 is greater than 0.

1.

11. A range hood, characterized in that: include: A box (10) is provided with a fan system (60) therein, the box (10) has a front face (111), and an air inlet (110) is provided on the front face of the box; and A smoke shield assembly has a first state and a second state; the smoke shield assembly comprises a first smoke shield (21) and a second smoke shield (22); in the first state, the first smoke shield (21) is located at a first position, and the second smoke shield (22) is located at a third position; in the second state, the first smoke shield (21) is located at a second position, and the second smoke shield (22) is located at a fourth position; The first smoke shield (21) is connected to the box body (10). When in the first position, the first smoke shield (21) covers the front surface (111) of the box body (10) and covers at least a portion of the air inlet (110). When in the second position, the first smoke shield (21) is open relative to the box body (10) and forms a first angle α with the front surface (111) of the box body (10). The second smoke shield (22) is connected to the first smoke shield (21). When in the third position, the second smoke shield (22) covers the front surface (111) of the box body (10) and is arranged below the first smoke shield (21). When in the fourth position, a second angle β is formed between the second smoke shield (22) and the front surface (111) of the box body (10). In the second state, the first smoke shield (21), the second smoke shield (22) and the front surface (111) of the box body (10) form a smoke collecting chamber, the smoke collecting chamber comprising a first portion (Q1) formed between the first smoke shield (21) and the front surface (111) of the box body (10) and a second portion (Q2) formed between the second smoke shield (22) and the front surface (111) of the box body (10), the opening width of the lower end of the first portion (Q1) being d1, and the opening width of the lower end of the second portion (Q2) being d2; The above α and β satisfy the following relationship: β>α, and the above d1 and d2 satisfy the following relationship: d2>d1; At least 5% of the total area of the air inlet (110) corresponds to the second portion (Q2); The above d1 and d2 also satisfy the following relationship: d2 ≥ 2d1; The above α and β also satisfy the following relationship: α>20°, β>75°; The length of the first smoke shield (21) is L1, the length of the second smoke shield (22) is L2, and L1≥1.5L2, and L2≥0.3L1; When the smoke shield assembly is in the second state, when the smoke shield assembly is projected onto a vertical plane, the projected height of the first smoke shield (21) is L3, the projected height of the second smoke shield (22) is L4, and L4 / L3≤0.2 is satisfied; The box body (10) has a bottom, a guide surface (14) is provided on the bottom, and when the smoke baffle assembly is in the second state, the extension direction of the guide surface (14) falls within the range of the second smoke baffle (22); The second smoke shield (22) is divided into a first section (221) and a second section (222) of equal length; when the smoke shield assembly is in the second state, the second section (222) is located further outward; and when the guide surface (14) is projected onto the plane where the second smoke shield (22) is located, it falls within the range defined by the second section (222); When the smoke shield assembly is in the second state, when the smoke shield assembly is projected onto a vertical plane, the projected height of the first portion (Q1) is H1, the projected height of the air inlet (110) located in the first portion (Q1) is H2, and H2 / H1 is greater than 0.5, 0.55, 0.6 or 0.65; When the smoke shield assembly is projected onto a vertical plane, the vertical distance from the upper end point of the air inlet (110) to the upper end point of the first part (Q1) is H3, and the ratio H3 / H1 is less than 0.3, 0.25 or 0.

2.

12. The range hood according to claim 11, characterized in that: An oil cup (61) is provided at the bottom of the box body (10), and a slope (611) is provided at a position adjacent to the guide surface (14) of the oil cup (61), and the slope (611) and the guide surface (14) extend in the same direction.

13. The range hood according to claim 11, characterized in that: When the smoke shield assembly is in the second state, when the smoke shield assembly is projected onto a vertical plane, the projected height of the second portion (Q2) is H4, the projected height of the air inlet (110) located in the second portion (Q2) is H5, and H5 / H4 is greater than 0.1.

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