Range hood

Abstract

The invention relates to the field of kitchen household appliances, and provides a range hood which comprises a first cavity, a second cavity, a first fan and a second fan. The air curtain device is arranged at the top of the first cavity and located on the smoke suction side of the smoke inlet hole, the air outlet direction of the air curtain device corresponds to the smoke inlet hole, and air enters the air curtain device from the side face of the top of the first cavity. Therefore, when a user installs wall cupboards on the two sides of the second cavity of the extractor hood, the air inlet holes corresponding to the second air inlets of the air curtain device are shielded by the wall cupboards, normal work of the air curtain device is affected, the air curtain device cannot eject enough airflow, the smoke suction effect of the extractor hood is reduced, and meanwhile the auxiliary smoke suction effect of the air curtain device is reduced.

Description

Technical Field

[0001] The present application relates to the field of kitchen appliances, and in particular to a range hood. Background Art

[0002] In order to improve the user experience, more and more research has been conducted on air curtain devices in the field of kitchen appliances. Among them, the arrangement of air curtain devices in range hood products can improve the smoke extraction effect of the range hood or prevent the oil smoke from contacting the user's body.

[0003] However, in current range hood products, the air inlet of the air curtain device is often arranged at the top cover of the first cavity of the range hood. This structure affects the aesthetics of the range hood to a certain extent. On the other hand, when the user installs wall cabinets on both sides of the second cavity of the range hood, the air inlet of the air curtain device is easily blocked by the wall cabinets, thereby affecting the normal operation of the air curtain device, reducing the auxiliary smoke extraction effect of the air curtain device, and further affecting the smoke extraction effect of the range hood. Summary of the invention

[0004] The present application provides a range hood, which can prevent the air inlet of the air curtain device from being blocked by the wall cabinets when the user installs wall cabinets on both sides of the second cavity of the range hood, thereby affecting the normal operation of the air curtain device and further affecting the smoke extraction effect of the range hood.

[0005] To solve the above-mentioned technical problems, the present application provides a range hood, comprising: a first cavity, provided with a smoke inlet hole; an air curtain device, arranged at the top of the first cavity and located on the inhalation side of the smoke inlet hole, the air outlet direction of the air curtain device corresponds to the smoke inlet hole, and the air curtain device takes in air from the side of the top of the first cavity.

[0006] In some embodiments, the first cavity includes a first sub-cavity and a second sub-cavity, the second sub-cavity extends forward from the top of the first sub-cavity, the smoke inlet is arranged at the front side of the first sub-cavity, and the air curtain device is arranged in the second sub-cavity.

[0007] In some embodiments, the wind curtain device includes: an air outlet channel, including a first air outlet, a top cover and a bottom cover, the top cover is arranged on the side of the air outlet channel away from the smoke inlet hole, and the bottom cover is arranged on the side of the air outlet channel close to the smoke inlet hole; the top cover and the bottom cover form an air cavity of the air outlet channel, and the first angle between the first arc tangent of the top cover at the first air outlet and the horizontal direction is 0-70°, and the second angle between the second arc tangent of the bottom cover at the first air outlet and the horizontal direction is 0-45°.

[0008] In some embodiments, a third angle between the first arc tangent and the second arc tangent is 0-20°.

[0009] In some embodiments, the air outlet channel also includes: a first air inlet, arranged on the side of the air outlet channel away from the first air outlet; the distance between the top cover and the bottom cover gradually decreases along the direction from the first air inlet to the first air outlet, and the width of the top cover and the bottom cover at the first air outlet is 2mm-8mm.

[0010] In some embodiments, the wind curtain device also includes: an wind curtain fan, including a second air inlet and a second air outlet, the second air inlet is connected to the outside of the top side of the first cavity, and the second air outlet is connected to the first air inlet.

[0011] In some embodiments, the first cavity includes: a first top plate, arranged on a side of the first cavity away from the smoke inlet hole; a second top plate, arranged on a side of the first cavity close to the smoke inlet hole; a side plate, connecting the first top plate and the second top plate, and the side plate is provided with a plurality of air inlet holes; the first top plate, the second top plate and the side plate form the second sub-cavity, and the air curtain device is arranged in the second sub-cavity.

[0012] In some embodiments, the total area of ​​the plurality of air inlet holes is greater than 0.5 times the area of ​​the second air inlet.

[0013] In some embodiments, the distance between the side panel and the side of the air curtain fan close to the side panel is greater than 6 mm.

[0014] In some embodiments, the second air inlet faces the first top plate, and the distance between the second air inlet and the first top plate is not less than 6 mm.

[0015] In some embodiments, the first cavity further includes: a front side plate, which is arranged at the top of the first cavity near the smoking side of the smoke inlet and is respectively connected to the first top plate and the second top plate; an isolation portion, including a first isolation plate and a second isolation plate, the first isolation plate is arranged on the side of the air curtain fan away from the front side plate, and the second isolation plate is arranged on the side of the air curtain fan away from the side plate; the air curtain fan is arranged in the space formed by the first top plate, the second top plate, the side plate, the front side plate and the isolation portion.

[0016] In some embodiments, the second cavity is connected to the first cavity, and the main fan of the range hood is arranged in the second cavity; the width of the second cavity is smaller than the width of the first cavity, and the range hood includes two air curtain devices, which are symmetrically arranged on both sides of the first cavity relative to the second cavity.

[0017] In some embodiments, the width of the first air outlet perpendicular to the air outlet direction is 180-450 mm; and the total width of the air curtains emitted by the two air curtain devices is greater than 450 mm.

[0018] In some embodiments, the range hood further comprises: a condensation plate, arranged on the side of the smoke inlet away from the range hood, an upper smoke inlet is arranged on the side of the condensation plate close to the wind curtain device, and the air outlet direction of the first air outlet is toward the upper smoke inlet.

[0019] In some embodiments, the distance between the condensation plate and the smoke inlet hole is greater than 40 mm.

[0020] The present application provides a range hood, comprising: a first cavity, provided with a smoke inlet hole; an air curtain device, provided at the top of the first cavity and located at the smoke-intake side of the smoke inlet hole, the air outlet direction of the air curtain device corresponding to the smoke inlet hole, and the air inlet of the air curtain device from the side of the top of the first cavity. This can prevent the air inlet hole corresponding to the second air inlet of the air curtain device from being blocked by the wall cabinet when the user installs wall cabinets on both sides of the second cavity of the range hood, thereby affecting the normal operation of the air curtain device, making it impossible for the air curtain device to emit sufficient airflow, reducing the smoke-intake effect of the range hood, and reducing the auxiliary smoke-intake effect of the air curtain device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them: Figure 1 A schematic diagram of the structure of a range hood provided in some embodiments of the present application; Figure 2 An exploded view of the range hood provided in the first embodiment of the present application; Figure 3 A side cross-sectional view of a range hood provided in some embodiments of the present application; Figure 4 A schematic diagram of the structure of the air curtain device provided in Embodiment 1 and Embodiment 2 of the present application; Figure 5 A side cross-sectional view of the air outlet channel provided in Embodiment 1 and Embodiment 2 of the present application; Figure 6 A bottom view of the single-side air outlet channel provided in Embodiment 1 and Embodiment 2 of the present application; Figure 7 A cross-sectional view of a partial structure of a range hood provided in Embodiment 1 of the present application; Figure 8 A schematic diagram of the structure of a condensation plate provided in some embodiments of the present application; Fig. 9 A three-dimensional diagram of a range hood provided in Embodiment 2 of the present application; Fig.10 A schematic diagram of a portion of the structure of a range hood provided in Embodiment 2 of the present application; Fig.11 A three-dimensional diagram of a partial structure of a range hood provided in Embodiment 3 of the present application; Fig.12 A cross-sectional view of a partial structure of a range hood provided in Embodiment 3 of the present application; Fig.13 A front view of a single-side air outlet channel provided in Embodiment 3 of the present application; Fig.14 This is a side sectional view of the air outlet duct provided in the third embodiment of the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] The terms "first" and "second" in this application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] All directional indications in the embodiments of the present application (such as up, down, left, right, front, back, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0026] Unless otherwise defined, the term “substantially” mentioned in this application, with respect to numerical quantities or quantitative relationships, can be understood as a range of approximately ±15% of a certain numerical value.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] With current range hoods, when the amount of oil smoke is large or the air intake of the range hood is small, the oil smoke that is not sucked away in time will quickly rise to the vicinity of the front edge of the range hood, and then leak into the room, causing air pollution.

[0029] Implementation method 1: In order to solve the above technical problems, the present application provides a range hood. Figure 1-Figure 2 , Figure 1 A schematic diagram of the structure of a range hood provided in some embodiments of the present application; Figure 2 This is an exploded view of the range hood provided in the first embodiment of the present application.

[0030] The range hood 100 includes a first cavity 110 and a second cavity 120. The first cavity 110 includes a smoke inlet plate 111, and the smoke inlet plate 111 is provided with a smoke inlet hole 1111. The second cavity 120 is connected to the first cavity 110, and the width of the second cavity 120 in the horizontal direction is smaller than the width of the first cavity 110 in the horizontal direction. The range hood 100 is fixedly installed on the wall through the second cavity 120. In some embodiments, the range hood 100 can also be installed with the first cavity 110 as low as possible, so that the smoke inlet hole 1111 is located closer to the pot, so as to improve the smoking effect. The second cavity 120 is provided with a main fan 121, so that the range hood 100 generates negative pressure in the cavity of the range hood 100 through the main fan 121, and sucks in oil smoke through the smoke inlet hole 1111. In some embodiments, in order to increase the air intake area, reduce the air intake wind resistance, and improve the smoking effect, the horizontal projection area of ​​the smoke inlet 1111 is set to be no less than 1 / 4 of the horizontal projection area of ​​the first cavity 110. In some embodiments, in order to improve the strength of the first cavity 110, reduce the deformation and vibration of the first cavity 110, and also to improve the smoking capacity at the smoke inlet 1111, the smoke inlet 1111 is set to be recessed into the interior of the first cavity 110. Further, in some embodiments, the range hood 100 is provided with an oil net 1112 at the smoke inlet 1111, thereby preventing large foreign objects from being sucked into the fan, and at the same time, condensing the oil stains, thereby intercepting the oil stains and reducing the pollution of the inner cavity of the range hood 100 by the oil stains.

[0031] See also Figure 2-Figure 3 , Figure 3 A side cross-sectional view of a range hood provided for some embodiments of the present application. The second cavity 120 further includes: a first back plate 122, a frame 123 and a front cover plate 124. When the range hood 100 is fixedly installed on the wall, the first back plate 122 is arranged close to the wall, the main fan 121 is arranged on the frame 123, the main air inlet 1211 of the main fan 121 faces the first back plate 122, and a certain distance is arranged between the main air inlet 1211 and the first back plate 122. In some embodiments, the distance between the main air inlet 1211 and the first back plate 122 is not less than 80 mm, so that the resistance to gas flow between the main air inlet 1211 and the smoke inlet 1111 is smaller, the path is shorter, and the smoke extraction capacity of the range hood 100 is stronger.

[0032] See also Figure 1 and Figure 2The first cavity 110 includes a first sub-cavity 110a and a second sub-cavity 110b. The second sub-cavity 110b extends forward from the top of the first sub-cavity 110a. The smoke inlet 1111 is arranged at the front side of the first sub-cavity 110a. The air curtain device 115 is arranged at the second sub-cavity 110b. The first cavity 110 further includes a second back plate 112, a first top plate 113, a second top plate 114 and an air curtain device 115. When the range hood 100 is fixedly installed on the wall, the second back plate 112 is arranged close to the wall, and the first top plate 113 is arranged on the side of the first cavity 110 close to the second cavity 120. In some embodiments, the first cavity 110 and the second cavity 120 are fixedly connected by the flange 1132 on the first top plate 113. The second top plate 114 is arranged on the side of the first cavity 110 away from the second cavity 120, and the second top plate 114 is connected to the smoke inlet plate 111. The first top plate 113 and the second top plate 114 form a second sub-cavity 110 b , and the air curtain device 115 is disposed in the second sub-cavity 110 b .

[0033] See also Figure 4 , Figure 4 A schematic diagram of the structure of the air curtain device provided in Embodiment 1 and Embodiment 2 of the present application. The air curtain device 115 is arranged at the top of the first cavity 110 and is located on the smoke inlet side of the smoke inlet plate 111. The air curtain device 115 includes an air curtain fan 1151 and an air outlet channel 1152, the air curtain fan 1151 includes a second air inlet 11511 and a second air outlet 11512, the air outlet channel 1152 includes a first air inlet 11521 and a first air outlet 11522, the second air inlet 11511 and the first air outlet 11522 are respectively connected to the outside of the range hood 100, the second air outlet 11512 is directly connected to the first air inlet 11521, and the first air outlet 11522 faces the smoke inlet hole 1111, that is, the direction of the air curtain airflow blown out from the first air outlet 11522 faces the smoke inlet hole 1111. As a result, the rising and leaking oil smoke can be promptly carried to the smoke inlet 1111 by the air curtain airflow blown out by the air curtain device 115, and then sucked away and discharged by the range hood 100, thereby avoiding partial oil smoke leakage and improving the smoke extraction effect. Furthermore, in the air curtain device 115 provided by the present application, the second air outlet 11512 of the air curtain fan 1151 is directly connected to the first air inlet 11521 of the air outlet channel 1152, which reduces the path of the air curtain airflow and does not require the provision of additional connecting pipes or fixing devices, thereby simplifying the structure of the air curtain device 115. Figure 1-Figure 3As shown, in this embodiment, the range hood 100 is a side-suction range hood, so compared with range hoods with other cavity structures, such as European-style range hoods, the smoke inlet 1111 of the range hood 100 provided in this application is closer to the pot mouth, so that the oil smoke below can be directly sucked into the smoke inlet 1111. The air curtain device 115 is arranged on the top of the range hood 100 and is located on the smoke intake side of the smoke inlet plate 111, so that the oil smoke that is not sucked in in time can be carried to the smoke inlet 1111 by the air curtain device 115 during the rising process, and then sucked and discharged by the range hood 100.

[0034] See also Figure 5 , Figure 5 A side cross-sectional view of the air outlet channel provided in Embodiment 1 and Embodiment 2 of the present application. In some embodiments, the air outlet channel 1152 includes a top cover 11523 and a bottom cover 11524, the top cover 11523 is arranged on the side of the air outlet channel 1152 away from the smoke inlet hole 1111, and the bottom cover 11524 is arranged on the side of the air outlet channel 1152 close to the smoke inlet hole 1111, and the top cover 11523 and the bottom cover 11524 form a wind cavity of the air outlet channel 1152. In some embodiments, in order to make the air curtain flow more smoothly in the air outlet channel 1152, the top cover 11523 and the bottom cover 11524 are configured to be arc-shaped near the first air outlet 11522, wherein the first angle θ between the first arc tangent a of the top cover 11523 at the first air outlet 11522 and the horizontal direction is in the range of 0-70°, and the second angle β between the second arc tangent b of the bottom cover 11524 at the first air outlet 11522 and the horizontal direction is in the range of 0-45°. Further, in some embodiments, the third angle α between the first arc tangent a and the second arc tangent b is in the range of 0-20°, thereby ensuring that the air curtain airflow emitted from the first air outlet 11522 of the air curtain device 115 is directed toward the smoke inlet 1111, thereby carrying the rising oil smoke to the smoke inlet 1111 in time, and preventing the air curtain airflow emitted from the first air outlet 11522 from spreading too much, thereby affecting the induced effect. Preferably, the first angle θ between the first arc tangent a of the top cover 11523 at the first air outlet 11522 and the horizontal direction is in the range of 0-65°, the second angle β between the second arc tangent b of the bottom cover 11524 at the first air outlet 11522 and the horizontal direction is in the range of 0-40°, and the third angle α between the first arc tangent a and the second arc tangent b is in the range of 0-15°. In some embodiments, the first angle θ, the second angle β and the third angle α can also be set to other angles according to different cavity structures of the range hood 100, as long as the air curtain airflow emitted from the first air outlet 11522 is ensured to be directed toward the smoke inlet 1111.

[0035] See also Figure 5 and Figure 6 , Figure 6Bottom view of the single-sided air outlet channel provided for Embodiment 1 and Embodiment 2 of the present application. In some embodiments, in order to ensure the pressurization effect of the air outlet channel 1152 and the speed of the wind curtain airflow ejected from the first air outlet 11522, the thickness of the air outlet channel 1152 (that is, the farthest distance between the top cover 11523 and the bottom cover 11524) gradually decreases in the direction from the first air inlet 11521 to the first air outlet 11522. The thickness of the air outlet channel 1152 at the first air inlet 11521 is adapted to the size of the second air outlet 11512, and the thickness of the air outlet channel 1152 at the first air outlet 11522, that is, the minimum thickness of the air outlet channel 1152 is 2mm-8mm. In some embodiments, in order to ensure the structural stability of the air outlet channel 1152 at the first air outlet 11522, the air outlet channel 1152 is provided with at least one support portion 11525 at the first air outlet 11522, and the support portion 11525 vertically connects the top cover 11523 and the bottom cover 11524. Figure 6 As shown, in some embodiments, the air outlet channel 1152 is evenly provided with three support portions 11525 at the first air outlet 11522. In other embodiments, the air outlet channel 1152 may also be provided with other numbers of support portions 11525, such as 4 or 5, as long as it is ensured that the normal ejection of the air curtain airflow is not affected. In some embodiments, in order to ensure the uniformity of the wind curtain airflow emitted from the first air outlet 11522 in a direction perpendicular to the air outlet direction, that is, to ensure the uniformity of the wind curtain airflow emitted from the first air outlet 11522 in the left and right width direction of the range hood 100 when the range hood 100 is hung, and at the same time reduce the size of the wind curtain fan 1151 and the air outlet channel 1152, the range hood 100 is provided with two wind curtain devices 115 in a direction perpendicular to the air outlet direction of the first air outlet 11522, and the total width of the wind curtain airflow emitted by the two wind curtain devices 115 is greater than 450 mm in a direction perpendicular to the air outlet direction, that is, in the left and right width direction of the range hood 100 when the range hood 100 is hung. Preferably, the total width of the wind curtain airflow emitted by the two wind curtain devices 115 is 500 mm-850 mm. In some embodiments, the length of the first air outlet 11522 of the single-sided air curtain device 115, that is, the width of the first air outlet 11522 in the direction perpendicular to the air outlet direction is 180mm-450mm, that is, when the range hood 100 is mounted, the width of the first air outlet 11522 in the left and right width direction facing the range hood 100 is 180mm-450mm. Preferably, the width of the first air outlet 11522 in the direction perpendicular to the air outlet direction is 200mm-370mm. In some embodiments, in order to further improve the uniformity of the air curtain airflow emitted from the air outlet channel 1152 in the direction perpendicular to the air outlet direction, the length of the air outlet channel 1152 in the air inlet direction can be extended according to the specific structure of the range hood 100. See. Figure 5In some embodiments, in order to facilitate the installation of the air outlet channel 1152 on the range hood 100, the air outlet channel 1152 is further provided with a mounting portion 11526, and the mounting portion 11526 is arranged on the side of the bottom cover 11524 away from the top cover 11523. Figure 6 As shown, in some embodiments, a plurality of mounting portions 11526 are respectively provided corresponding to a plurality of supporting portions 11525. In other embodiments, the mounting portion 11526 may also be provided at other positions of the air outlet channel 1152 according to different structures of the range hood 100 and the position of the air outlet channel 1152.

[0036] See also Figure 7 , Figure 7 A cross-sectional view of a partial structure of a range hood provided in Embodiment 1 of the present application. The two air curtain devices 115 of the range hood 100 are symmetrically arranged on both sides of the first cavity 110 relative to the second cavity 120. In some embodiments, the first top plate 113 is provided with a plurality of air inlet holes 1131 at positions corresponding to the second air inlet 11511, and the setting range of the plurality of air inlet holes 1131 is adapted to the air inlet area of ​​the second air inlet 11511, so that the second air inlet 11511 is connected to the outside of the range hood 100. Figure 7 As shown, in this embodiment, in order to increase the air intake volume of the air curtain fan 1151 at the second air inlet 11511 and improve the aesthetics of the range hood 100, the shape of the air inlet hole 1131 is set to a regular hexagon. In other embodiments, the air inlet hole 1131 can also be set to other shapes according to different needs. Further, in order to improve the air suction efficiency of the air curtain fan 1151 at the second air inlet 11511, the range hood 100 also includes a sealing gasket 117, which is arranged between the first top plate 113 and the air curtain fan 1151, and the sealing gasket 117 is arranged around the second air inlet 11511 and the periphery of the plurality of air inlet holes 1131. Figure 1 In some embodiments, an air outlet 1141 is provided at a position of the second top plate 114 corresponding to the first air outlet 11522 , and the shape and size of the air outlet 1141 are adapted to the shape and size of the first air outlet 11522 so that the first air outlet 11522 is connected to the outside of the range hood 100 .

[0037] See also Figure 1-Figure 3 and Figure 8 , Figure 8A schematic diagram of the structure of the condensation plate provided for some embodiments of the present application. In some embodiments, the range hood 100 further includes a condensation plate 130, which is disposed on the side of the smoke inlet plate 111 away from the range hood 100, that is, the condensation plate 130 is disposed on the smoke inlet side of the smoke inlet plate 111, and the condensation plate 130 covers the smoke inlet hole 1111. The condensation plate 130 includes a plurality of upper smoke inlet holes 131 and a plurality of lower smoke inlet holes 132. In some embodiments, the air outlet direction of the first air outlet 11522 is toward the upper smoke inlet hole 131, that is, the first angle θ, the second angle β and the third angle α need to be set to be smaller, thereby, part of the oil smoke can enter the smoke inlet hole 1111 from the lower smoke inlet hole 132 to be sucked in and discharged by the range hood 100, and the remaining oil smoke can be carried to the upper smoke inlet hole 131 through the air curtain device 115, thereby entering the smoke inlet hole 1111 from the upper smoke inlet hole 131 to be sucked in and discharged by the range hood 100. See. Figure 1 , the condensation plate 130 is installed on the smoke inlet plate 111 through the installation assembly 133. In some embodiments, the condensation plate 130 can be fixedly installed on the smoke inlet plate 111, and in other embodiments, the condensation plate 130 can also rotate relative to the smoke inlet plate 111. At the same time, the condensation plate 130 can be set parallel to the smoke inlet plate 111 according to different usage scenarios, or the condensation plate 130 can be set at a certain angle to the smoke inlet plate 111. Figure 3 In some embodiments, in order to prevent the condensation plate 130 from blocking the smoke inlet hole 1111, thereby reducing the smoke extraction capacity of the range hood 100, the distance between the condensation plate 130 and the smoke inlet plate 111 is set to be greater than 40 mm. Preferably, the distance between the condensation plate 130 and the smoke inlet plate 111 is set to be not less than 50 mm.

[0038] See also Figure 2 In some embodiments, the range hood 100 further includes an electric control module 140 and a check valve 150. The electric control module 140 is disposed on the side of the second cavity 120 away from the first cavity 110, and the electric control module 140 is electrically connected to the main fan 121 and the air curtain fan 1151, respectively, for controlling the operation of the range hood 100; the check valve 150 is connected to the main air outlet 1212 of the main fan 121. Further, in order to improve the aesthetics of the range hood 100, the range hood 100 further includes a decorative cover 160, which is disposed around the side of the front cover plate 124 and the frame 123. See Figure 1-Figure 3 In some embodiments, the first cavity 110 further includes an oil cup 118, which is disposed on the side of the smoke inlet plate 111 away from the second top plate 114, and is used to collect oil condensed on the oil net 1112 or the condensation plate 130 to prevent the oil from dripping into the pot or onto the stove.

[0039] Implementation method 2: The air curtain device 115 provided in the first embodiment of the present application takes in air from the air inlet 1131 of the first top plate 113 of the first cavity 110. When the user installs wall cabinets on both sides of the second cavity 120, the air inlet 1131 is easily blocked by the wall cabinets, affecting the air intake of the air curtain device 115, so that it cannot emit sufficient airflow, reducing the auxiliary smoking effect of the air curtain device 115. Therefore, the present application also provides a range hood 200, see Fig. 9 and Fig.10 , Fig. 9 A three-dimensional diagram of a range hood provided in Embodiment 2 of the present application; Fig.10 This is a partial structural schematic diagram of a range hood provided in the second embodiment of the present application. The range hood 200 also includes a first cavity 210 and a second cavity 220. Among them, the first cavity 210 includes a side panel 219, and the side panel 219 is arranged on both sides of the range hood 200. The side panel 219 includes a first side panel 2191 and a second side panel 2192, the first side panel 2191 vertically connects the first top panel 213 and the second top panel 214 of the first cavity 210, and the second side panel 2192 connects the smoke inlet panel 211 of the first cavity 210. The air curtain device 215 is arranged in the second sub-cavity 210b formed by the first top panel 213, the second top panel 214 and the first side panel 2191, and the air curtain device 215 is also composed of an air curtain fan 2151 and an air outlet channel 2152. The structure of the air curtain device 215 provided in the second embodiment of the present application is the same as the structure of the air curtain device 115 provided in the first embodiment, and will not be described here. In some embodiments, the first side plate 2191 is provided with a plurality of air inlet holes 21911. Thus, the second air inlet 21511 of the air curtain device 215 is connected to the outside of the range hood 200, that is, the air curtain device 215 takes in air from the side of the top of the first cavity 210, so as to avoid blocking the air inlet holes 21911 when the user sets wall cabinets or other devices on both sides of the second cavity 220, so that the air curtain device 215 cannot emit sufficient airflow, thereby reducing the auxiliary smoking effect of the air curtain device 215.

[0040] Continue to see Fig. 9 and Fig.10In some embodiments, in order to increase the air intake of the air curtain device 215, multiple air inlet holes 21911 are arranged in parallel as multiple long strip-shaped air holes; in other embodiments, the air inlet holes 21911 may also be arranged in other shapes. In some embodiments, in order to further increase the air intake of the air curtain device 215, the total area of ​​the multiple air inlet holes 21911 is greater than 0.5 times the area of ​​the second air inlet 21511 of the air curtain fan 2151. Preferably, the total area of ​​the multiple air inlet holes 21911 is greater than 0.7 times the area of ​​the second air inlet 21511 of the air curtain fan 2151. In some embodiments, in order to prevent the air inlet holes 21911 from being blocked by the air curtain fan 2151 and to reduce the resistance of the air curtain fan 2151 to inhale air from the outside of the range hood 200, the distance between the first side plate 2191 and the side of the air curtain fan 2151 close to the first side plate 2191 is greater than 6 mm. Preferably, the distance between the first side plate 2191 and the side of the air curtain fan 2151 close to the first side plate 2191 is greater than 8 mm. Furthermore, to prevent the second air inlet 21511 of the air curtain fan 2151 from being blocked by the first top plate 213, the distance between the second air inlet 21511 and the first top plate 213 is not less than 6 mm.

[0041] See also Fig.10 The first cavity 210 is provided with a front side plate 2193, which is provided at the top of the first cavity 210 near the smoking side of the smoke inlet plate 211, and the front side plate 2193 is respectively connected to the first top plate 213 and the second top plate 214. In some embodiments, in order to improve the air suction efficiency of the air curtain fan 2151 at the second air inlet 21511, the first cavity 210 further includes an isolation portion 217, and the isolation portion 217 includes a first isolation plate 2171 and a second isolation plate 2172. The first isolation plate 2171 is provided on the side of the air curtain fan 2151 away from the front side plate 2193 and connected to the first side plate 2191, and the second isolation plate 2172 is provided on the side of the air curtain fan 2151 away from the first side plate 2191 and connected to the front side plate 2193. Fig.10 As shown, one end of the first isolation plate 2171 away from the first side plate 2191 is connected to one end of the second isolation plate 2172 away from the front side plate 2193. Thus, the air curtain fan 2151 is arranged in the space formed by the first top plate 213, the second top plate 214, the front side plate 2193 and the isolation portion 217, so that the air curtain fan 2151 is isolated from the internal space of the range hood 200, thereby ensuring that the air curtain fan 2151 can only inhale air from the external space, and will not inhale air containing a large amount of oil smoke from the inside of the range hood 200, thereby preventing the air curtain device 215 from being contaminated by oil smoke and reducing its service life.

[0042] The second cavity 220, the condensation plate 230 and other structures of the range hood 200 provided in the second embodiment of the present application are the same as the corresponding structures of the range hood 100 provided in the first embodiment, and will not be described again here.

[0043] Implementation method three: See also Fig.11 and Fig.12 , Fig.11 A three-dimensional diagram of a partial structure of a range hood provided in Embodiment 3 of the present application; Fig.12 A cross-sectional view of a partial structure of a range hood provided in Embodiment 3 of the present application. Embodiment 3 of the present application provides a range hood 300, which also includes a first cavity 310 and a second cavity 320. Among them, a smoke inlet hole 3111 is provided on the smoke inlet plate 311 of the first cavity 310; the second cavity 320 includes a first back plate 322, a frame 323 and a front cover plate 324. The decorative cover 360 is arranged around the side of the front cover plate 324 and the frame 323, and a certain distance is arranged between the decorative cover 360 and the front cover plate 324, so that the decorative cover 360 and the front cover plate 324 form an air curtain cavity 316. Part of the air curtain device 315 is arranged outside the side wall of the second cavity 320 on the same side as the smoke inlet hole 3111, that is, part of the air curtain device 315 is arranged in the air curtain cavity 316 formed by the front cover plate 324 and the decorative cover 360. Thus, the air curtain device 315 can take in air from the top of the range hood 300, that is, there is no need to set an air inlet corresponding to the air curtain device 315 on the outer surface of the range hood 300, which can improve the aesthetics of the range hood 300. Furthermore, the air curtain device 315 is partially arranged in the air curtain cavity 316 formed by the front cover plate 324 and the decorative cover 360, thereby reducing the space occupied by the air curtain device 315 in the range hood 300, thereby reducing the volume of the range hood 300.

[0044] Continue to see Fig.11 and Fig.12, the air curtain device 315 includes an air curtain fan 3151 and an air outlet channel 3152. The air curtain fan 3151 is arranged in the air curtain cavity 316, so that the air curtain device 315 takes in air from the decorative cover 360 of the range hood 300 and the top of the second cavity 320. The air curtain fan 3151 includes a second air inlet 31511 and a second air outlet 31512, and the second air inlet 31511 faces the decorative cover 360. In some embodiments, in order to prevent the second air inlet 31511 from being blocked by the decorative cover 360, thereby affecting the air curtain airflow emitted by the air curtain device 315, the distance between the second air inlet 31511 and the decorative cover 360 is set to be greater than 8 mm. Preferably, the distance between the second air inlet 31511 and the decorative cover 360 is set to be greater than 10 mm. In some embodiments, the range hood 300 includes two air curtain devices 315, which are symmetrically arranged at the front side of the range hood 300 in a direction perpendicular to the air inlet direction of the second air inlet 31511, that is, in the vertical direction. Part of the air outlet channel 3152 is arranged in the air curtain cavity 316, and the other part of the air outlet channel 3152 is arranged in the first cavity 310. The air outlet channel 3152 includes a first air inlet 31521 and a first air outlet 31522, and the first air inlet 31521 is directly connected to the second air outlet 31512 in the vertical direction. The width of the air outlet channel 3152 in the vertical direction of the air outlet direction of the first air outlet 31522 provided in the third embodiment of the present application is the same as the structure of the air outlet channel 1152 provided in the first embodiment, and will not be described here. In some embodiments, in order to facilitate the guidance of the airflow entering the air curtain fan 3151 and fill the entire air outlet channel 3152 along the left and right width direction of the range hood 300, and at the same time improve the uniformity of the air curtain airflow emitted from the air outlet channel 3152 along the left and right width direction of the range hood 300, the thickness of the air outlet channel 3152 is gradually increased from the first air inlet 31521 to the first air outlet 31522. In some embodiments, the decorative cover 360 is provided with an air inlet hole (not shown in the figure) at a position corresponding to the second air inlet 31511.

[0045] See also Fig.13 , Fig.13A front view of a single-sided air outlet channel provided for the third embodiment of the present application. In some embodiments, the air outlet channel 3152 includes an air inlet 31527 and an air outlet 31528, the air inlet 31527 is connected to the second air outlet 31512 through the first air inlet 31521, and the air inlet 31527 is arranged in the air curtain cavity 316, the air outlet 31528 is located at the front side of the first cavity 310 close to the second cavity 320, and the air outlet 31528 is arranged on the side of the air inlet 31527 away from the first air inlet 31521. In the vertical direction of the air inlet direction of the second air inlet 31511, that is, in the vertical direction, the height of the air outlet 31528 is adapted to the distance between the first top plate 313 and the second top plate 314 of the first cavity 310. In some embodiments, in order to reduce the loss of the airflow entering from the air curtain fan 3151 in the air outlet channel 3152, the total height of the air outlet channel 3152 is set to be greater than 3 times the height of the air outlet portion 31528 in the vertical direction. In some embodiments, in order to facilitate the pressurization of the airflow in the air outlet channel 3152, the height of the air outlet portion is set to be greater than 25 mm. Preferably, the height of the air outlet portion is set to be greater than 30 mm.

[0046] See also Fig.14 , Fig.14 This is a side cross-sectional view of the air outlet channel provided in the third embodiment of the present application. In some embodiments, the air outlet channel 3152 is formed by a top cover 31523 and a bottom cover 31524. The angle setting of the top cover 31523 and the bottom cover 31524 of the air outlet channel 3152 provided in the third embodiment of the present application at the first air outlet 31522 is the same as the structure of the air outlet channel 1152 provided in the first embodiment, and will not be described here. At the same time, the other structures of the first cavity 310, the second cavity 320, the condensation plate 330, etc. of the range hood 300 provided in the third embodiment of the present application are the same as the corresponding structures of the range hood 100 provided in the first embodiment, and will not be described here.

[0047] The present application provides a range hood 200, comprising: a first cavity 210, comprising a smoke inlet plate 111, the smoke inlet plate 111 being provided with a smoke inlet hole 1111; an air curtain device 215, arranged at the top of the first cavity 210 and located at the inhalation side of the smoke inlet plate 111, the air outlet direction of the air curtain device 215 corresponding to the smoke inlet hole 1111, and the air inlet of the air curtain device 215 from the side of the top of the first cavity 210. Thus, when the user installs wall cabinets on both sides of the second cavity 220 of the range hood 200, the air inlet hole 21911 corresponding to the second air inlet 21511 of the air curtain device 215 is prevented from being blocked by the wall cabinets, thereby affecting the normal operation of the air curtain device 215, making it impossible for the air curtain device to emit sufficient airflow, reducing the inhalation effect of the range hood, and reducing the auxiliary inhalation effect of the air curtain device.

[0048] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A range hood, characterized in that: include: The first cavity is provided with a smoke inlet hole; The air curtain device is arranged at the top of the first cavity and is located at the smoking side of the smoke inlet. The air outlet direction of the air curtain device is toward the smoke inlet. The air inlet of the air curtain device is from the side of the top of the first cavity.

2. The range hood according to claim 1, characterized in that: The first cavity includes a first sub-cavity and a second sub-cavity, the second sub-cavity is extended forward from the top of the first sub-cavity, the smoke inlet is arranged at the front side of the first sub-cavity, and the air curtain device is arranged in the second sub-cavity.

3. The range hood according to claim 1, characterized in that: The air curtain device comprises: An air outlet channel, comprising a first air outlet, a top cover and a bottom cover, wherein the top cover is arranged on a side of the air outlet channel away from the smoke inlet hole, and the bottom cover is arranged on a side of the air outlet channel close to the smoke inlet hole; The top cover and the bottom cover form an air cavity of the air outlet channel, a first angle between a first arc tangent of the top cover at the first air outlet and the horizontal direction is 0-70°, and a second angle between a second arc tangent of the bottom cover at the first air outlet and the horizontal direction is 0-45°.

4. The range hood according to claim 3, characterized in that: A third angle between the first arc tangent and the second arc tangent is 0-20°.

5. The range hood according to claim 3, characterized in that: The air outlet channel also includes: A first air inlet, arranged on a side of the air outlet channel away from the first air outlet; The distance between the top cover and the bottom cover gradually decreases along the direction from the first air inlet to the first air outlet, and the width of the top cover and the bottom cover at the first air outlet is 2mm-8mm.

6. The range hood according to claim 5, characterized in that: The air curtain device also includes: The air curtain fan comprises a second air inlet and a second air outlet, wherein the second air inlet is communicated with the outside of the top side of the first cavity, and the second air outlet is connected with the first air inlet.

7. The range hood according to claim 6, characterized in that: The first cavity comprises: A first top plate, arranged on a side of the first cavity away from the smoke inlet hole; A second top plate, disposed on a side of the first cavity close to the smoke inlet hole; A side plate, connecting the first top plate and the second top plate, the side plate being provided with a plurality of air inlet holes; The first top plate, the second top plate and the side plate form the second sub-cavity, and the air curtain device is arranged in the second sub-cavity.

8. The range hood according to claim 7, characterized in that: The total area of ​​the plurality of air inlet holes is greater than 0.5 times the area of ​​the second air inlet.

9. The range hood according to claim 8, characterized in that: The distance between the side plate and the side of the air curtain fan close to the side plate is greater than 6 mm.

10. The range hood according to claim 7, characterized in that: The second air inlet faces the first top plate, and the distance between the second air inlet and the first top plate is not less than 6 mm.

11. The range hood according to claim 7, characterized in that: The first cavity further comprises: A front side plate, arranged on the top of the first cavity and close to the smoke inlet, and connected to the first top plate and the second top plate respectively; The isolation part comprises a first isolation plate and a second isolation plate, wherein the first isolation plate is arranged on a side of the air curtain fan away from the front side plate, and the second isolation plate is arranged on a side of the air curtain fan away from the side plate; The air curtain fan is disposed in a space formed by the first top plate, the second top plate, the side plates, the front side plates, and the isolation portion.

12. The range hood according to claim 3, characterized in that: Also includes: a second cavity, connected to the first cavity, wherein a main fan of the range hood is arranged in the second cavity; The width of the second cavity is smaller than that of the first cavity. The range hood comprises two air curtain devices, which are symmetrically arranged on two sides of the first cavity relative to the second cavity.

13. The range hood according to claim 12, characterized in that: The width of the first air outlet perpendicular to the air outlet direction is 180 mm-450 mm; The total width of the air curtains emitted by the two air curtain devices is greater than 450 mm.

14. The range hood according to any one of claims 1 to 13, characterized in that: Also includes: A condensation plate is arranged on the side of the smoke inlet away from the range hood, an upper smoke inlet is arranged on the side of the condensation plate close to the air curtain device, and an air outlet direction of the first air outlet is toward the upper smoke inlet.

15. The range hood according to claim 14, characterized in that: The distance between the condensation plate and the smoke inlet hole is greater than 40 mm.

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