Range hood

Abstract

The application relates to the field of kitchen appliances, and provides a range hood, which comprises a smoke collecting cavity provided with a smoke suction port; a wind curtain device, which is arranged at the top of the smoke collecting cavity and located at the smoke inlet side of the smoke collecting cavity; the wind curtain device comprises a wind curtain fan, the wind curtain fan comprises a first air inlet, the first air inlet is arranged at the side of the wind curtain fan close to the smoke suction port, and the air outlet direction of the wind curtain device faces the smoke suction port. The range hood provided by the application plays an auxiliary smoke suction effect through the arrangement of the wind curtain device, and the air inlet direction of the wind curtain device faces downward, so that the structure of the range hood is more compact.

Description

Technical Field

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

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It is usually installed above the stove and is used to quickly remove the waste from the stove and the harmful fumes produced during cooking and exhaust them outdoors.

[0003] To further improve the performance and user experience of range hoods, air curtain devices are often installed to assist in smoke extraction and prevent cooking fumes from harming the user. However, the structural space of range hoods is often quite compact, and the placement of the air curtain device often affects the installation of other components, such as lighting and control components. This necessitates that the design of the air curtain component take these factors into account, resulting in different shapes, structures, and arrangements. Summary of the Invention

[0004] This application provides a range hood that uses an air curtain device to assist in smoke extraction. The downward orientation of the air curtain device's air inlet makes the range hood's structure more compact. This not only provides sufficient installation space for lighting, control, and other components, but also reduces the noise generated by the air curtain fan, which is directly transmitted through the air curtain inlet on the range hood, thus reducing the overall operating noise to a certain extent.

[0005] To solve the above-mentioned technical problems, this application provides a range hood, including: a smoke collection chamber with a smoke inlet; an air curtain device disposed at the top of the smoke collection chamber and located on the smoke inlet side of the smoke collection chamber; the air curtain device includes an air curtain fan, the air curtain fan includes a first air inlet, the first air inlet is disposed on the side of the air curtain fan near the smoke inlet, and the air outlet direction of the air curtain device is towards the smoke inlet.

[0006] In some embodiments, the air curtain device includes an air curtain duct, comprising a second air outlet, an upper cover plate, and a lower cover plate. The upper cover plate is disposed on the side of the air curtain duct away from the smoke inlet, and the lower cover plate is disposed on the side of the air curtain duct closer to the smoke inlet. The upper cover plate and the lower cover plate form the air cavity of the air curtain duct. The first angle between the first arc tangent of the upper cover plate at the second air outlet and the horizontal direction is 0-70°, and the second angle between the second arc tangent of the lower cover plate at the second air outlet and the horizontal direction is 0-45°.

[0007] In some embodiments, the third included angle between the first arc tangent and the second arc tangent is 0-20°.

[0008] In some embodiments, the first air inlet and the second air outlet are connected to the outside of the range hood; the air curtain duct further includes a second air inlet, which is located at the end of the air curtain duct away from the second air outlet; the air curtain fan further includes a first air outlet, which is connected to the second air inlet.

[0009] In some embodiments, the distance between the upper cover and the lower cover gradually decreases along the direction from the second air inlet to the second air outlet, and the distance between the upper cover and the lower cover at the second air outlet is 2mm-8mm.

[0010] In some embodiments, the smoke collection chamber includes: an upper top plate disposed on the side of the smoke collection chamber away from the smoke inlet; a lower top plate disposed on the side of the smoke collection chamber near the smoke inlet; side plates disposed on both sides of the smoke collection chamber, the side plates connecting the upper top plate and the lower top plate; a front side plate disposed on the top of the smoke collection chamber near the smoke inlet, and connecting the upper top plate, the lower top plate, and the side plates respectively; an isolation section disposed between the upper top plate and the lower top plate, and disposed opposite to the side plates and the front side plate; and an air curtain fan disposed in the space formed by the upper top plate, the lower top plate, the side plates, the front side plate, and the isolation section.

[0011] In some embodiments, the isolation section includes: a first isolation plate and a second isolation plate, wherein the first isolation plate is disposed on the side of the air curtain fan away from the front side plate, and the second isolation plate is disposed on the side of the air curtain fan away from the side plate.

[0012] In some embodiments, the first air inlet faces the lower top plate, and the distance between the first air inlet and the lower top plate is not less than 6 mm.

[0013] In some embodiments, the side plate is provided with a plurality of first air inlets, the air curtain device draws air from the side of the smoke collection chamber, the distance between the side plate and the side of the air curtain fan closest to the side plate is greater than 6 mm, and the total area of ​​the plurality of first air inlets is greater than 0.5 times the area of ​​the first air inlet.

[0014] In some embodiments, the top plate is provided with a plurality of second air inlets, and the air curtain device draws air from the top of the smoke collection chamber. The total area of ​​the plurality of second air inlets is greater than 0.5 times the area of ​​the first air inlet.

[0015] In some embodiments, the smoke exhaust chamber is connected to the smoke collection chamber, and the main fan of the range hood is disposed in the smoke exhaust chamber; the width of the smoke exhaust chamber is smaller than the width of the smoke collection chamber, and the range hood includes two air curtain devices, which are symmetrically disposed on both sides of the smoke collection chamber relative to the smoke exhaust chamber.

[0016] In some embodiments, the width of the second air outlet perpendicular to the air outlet direction is 180-450mm; the total width of the air curtain emitted by the two air curtain devices is greater than 450mm.

[0017] In some embodiments, a condenser plate is disposed on the side of the smoke inlet away from the range hood, and an upper smoke inlet is provided on the side of the condenser plate near the air curtain device, with the air outlet direction of the air curtain device corresponding to the upper smoke inlet.

[0018] In some embodiments, the distance between the condenser plate and the smoke inlet is greater than 40 mm.

[0019] This application provides a range hood, including: a smoke collection chamber with a smoke inlet; and an air curtain device disposed at the top of the smoke collection chamber and on the smoke inlet side of the chamber. The air curtain device includes an air curtain fan with a first air inlet located near the smoke inlet, and the air outlet of the air curtain device faces the smoke inlet. The range hood provided by this application uses an air curtain device to assist in smoke extraction. Furthermore, the downward orientation of the air inlet of the air curtain device makes the range hood more compact, providing sufficient installation space for lighting, control, and other components. It also reduces the noise generated by the air curtain fan, which is directly transmitted through the air curtain inlet on the range hood, thus lowering the overall operating noise to some extent. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a schematic diagram of the structure of a range hood provided in some embodiments of this application;

[0022] Figure 2 Exploded views of range hoods provided in some embodiments of this application;

[0023] Figure 3 This is a schematic diagram of the structure of a range hood after removing the top plate, provided in some embodiments of this application;

[0024] Figure 4 This is a schematic diagram of the structure of an air curtain device provided in some embodiments of this application;

[0025] Figure 5 This is a cross-sectional view of a partial structure of a range hood provided in some embodiments of this application;

[0026] Figure 6 A side sectional view of an air curtain duct provided for some embodiments of this application;

[0027] Figure 7 A bottom view of a single-sided air curtain duct provided in some embodiments of this application;

[0028] Figure 8 This is a cross-sectional view of a portion of the structure of a range hood provided in another embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the structure of a condenser plate provided in some embodiments of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0031] The terms "first" and "second" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, all directional indicators (such as up, down, left, right, front, back, top, bottom, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0034] Unless otherwise defined, the term “approximately” as used in this application can be understood, in relation to numerical quantities or quantitative relationships, as a range of approximately ±15% of a given value.

[0035] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] Currently, installing air curtain devices in range hoods often affects the installation of other components, resulting in larger and less aesthetically pleasing range hoods.

[0037] To solve the above-mentioned technical problems, this application provides a range hood 100. See also... Figures 1-3 , Figure 1 This is a schematic diagram of the structure of a range hood provided in some embodiments of this application; Figure 2 Exploded views of range hoods provided in some embodiments of this application; Figure 3 This is a schematic diagram of the structure of a range hood after removing the top plate, as provided in some embodiments of this application.

[0038] The range hood 100 includes a smoke collection chamber 110, and the smoke collection chamber 110 is provided with a smoke inlet 1111. In some embodiments, the smoke collection chamber 110 includes a smoke collection plate 111, which is disposed on the side of the smoke collection chamber 110 away from the wall after installation, and the smoke inlet 1111 is disposed on the smoke collection plate 111. In some embodiments, in order to increase the air intake area, reduce the air intake resistance, and improve the smoke extraction effect, the projected area of ​​the smoke inlet 1111 in the horizontal direction is not less than 1 / 4 of the projected area of ​​the smoke collection chamber 110 in the horizontal direction. In some embodiments, in order to improve the strength of the smoke collection chamber 110, reduce the deformation and vibration of the smoke collection chamber 110, and also to improve the smoke extraction capacity at the smoke inlet 1111, the smoke inlet 1111 is recessed into the interior of the smoke collection chamber 110.

[0039] See Figure 3 and Figure 4 , Figure 4This is a schematic diagram of the air curtain device provided in some embodiments of this application. The range hood 100 further includes an air curtain device 115, which is disposed at the top of the smoke collection chamber 110 and located on the smoke inlet side of the smoke collection chamber 110. The air outlet direction of the air curtain device 115 is towards the smoke inlet 1111, thereby allowing rising and leaking fumes to be carried by the air curtain airflow blown out by the air curtain device 115 to the smoke inlet 1111 and then sucked away and discharged by the range hood 100, thus preventing some fumes from leaking and improving the smoke extraction effect. Furthermore, the air curtain device 115 includes an air curtain fan 1151 and an air curtain duct 1152. The air curtain fan 1151 includes a first air inlet 11511 and a first air outlet 11512. The first air inlet 11511 is located on the side of the air curtain fan 1151 near the smoke inlet 1111, that is, the first air inlet 11511 of the air curtain fan 1151 faces downward. The air curtain duct 1152 includes a second air inlet 11521 and a second air outlet 11522. The first air inlet 11511 and the second air outlet 11522 are respectively connected to the outside of the range hood 100. The first air outlet 11512 is directly connected to the second air inlet 11521, and the second air outlet 11522 faces the smoke inlet 1111, that is, the direction of the air curtain airflow blown out from the second air outlet 11522 is towards the smoke inlet 1111.

[0040] See Figures 1-3The smoke collection chamber 110 further includes a first back plate 112, an upper top plate 113, a lower top plate 114, a side plate 119, a front side plate 1193, and an isolation section 117. When the range hood 100 is fixedly installed on the wall, the first back plate 112 is positioned close to the wall, the upper top plate 113 is positioned on the side of the smoke collection chamber 110 near the smoke inlet 1111, and the lower top plate 114 is positioned on the side of the smoke collection chamber 110 away from the smoke inlet 1111, and the lower top plate 114 is connected to the smoke collection plate 111. The side plates 119 are positioned on both sides of the range hood 100. The side plates 119 include a first side plate 1191 and a second side plate 1192. The first side plate 1191 is vertically connected to the upper top plate 113 and the lower top plate 114 of the smoke collection chamber 110, and the second side plate 1192 is connected to the smoke collection plate 111 of the smoke collection chamber 110. The front side plate 1193 is located at the top of the smoke collection chamber 110 near the smoking side of the smoke collection plate 111, and the front side plate 1193 is connected to the upper top plate 113 and the lower top plate 114 respectively. The isolation section 117 includes a first isolation plate 1171 and a second isolation plate 1172. The first isolation plate 1171 is located on the side of the air curtain fan 1151 away from the front side plate 1193 and is connected to the first side plate 1191. The second isolation plate 1172 is located on the side of the air curtain fan 1151 away from the first side plate 1191 and is connected to the front side plate 1193. The end of the first isolation plate 1171 away from the first side plate 1191 is connected to the end of the second isolation plate 2172 away from the front side plate 2193. Therefore, the air curtain fan 1151 is installed in the space formed by the upper top plate 113, the lower top plate 114, the front side plate 1193 and the isolation part 117, so that the air curtain fan 1151 is isolated from the internal space of the range hood 100. This ensures that the air curtain fan 1151 can only draw in air from the external space and will not draw in air containing a large amount of oil fumes from the inside of the range hood 100, thereby preventing the air curtain device 115 from being contaminated by oil fumes and reducing its service life.

[0041] See Figure 5 and Figure 6 , Figure 5 This is a cross-sectional view of a partial structure of a range hood provided in some embodiments of this application; Figure 6 This is a side cross-sectional view of an air curtain duct provided in some embodiments of this application. To ensure that the second air outlet 11522 of the air curtain duct 1152 faces the smoke inlet 1111, in some embodiments, the air curtain duct 1152 is configured to bend towards the smoke inlet 1111. Furthermore, since the first air outlet 11512 is directly connected to the second air inlet 11521, and the first air inlet 11511 of the air curtain fan 1151 faces downwards, an installation space 116 is formed between the air curtain device 115 and the lower top plate 114. This allows other components of the range hood 100, such as lighting components, to be installed in the installation space 116, resulting in a more compact structure for the range hood 100. In some embodiments, the distance between the first air inlet 11511 and the lower top plate 114 is not less than 6 mm.

[0042] See also Figure 6 In some embodiments, the air curtain duct 1152 includes an upper cover plate 11523 and a lower cover plate 11524. The upper cover plate 11523 is disposed on the side of the air curtain duct 1152 away from the smoke inlet 1111, and the lower cover plate 11524 is disposed on the side of the air curtain duct 1152 close to the smoke inlet 1111. The upper cover plate 11523 and the lower cover plate 11524 form the air cavity of the air curtain duct 1152. In some embodiments, to ensure smoother airflow within the air curtain duct 1152, the upper cover plate 11523 and the lower cover plate 11524 are configured with an arc shape near the second air outlet 11522. Specifically, the first angle θ between the first arc tangent a of the upper cover plate 11523 at the second air outlet 11522 and the horizontal direction ranges from 0 to 70°, and the second angle β between the second arc tangent b of the lower cover plate 11524 at the second air outlet 11522 and the horizontal direction ranges from 0 to 45°. Further, in some embodiments, the third angle α between the first arc tangent a and the second arc tangent b ranges from 0 to 20°. This ensures that the airflow emitted from the second air outlet 11522 by the air curtain device 115 is directed towards the smoke inlet 1111, thereby promptly carrying the rising fumes to the smoke inlet 1111, while preventing the airflow emitted from the second air outlet 11522 from diffusing too much and affecting the extraction effect. Preferably, the first angle θ between the first arc tangent a at the second air outlet 11522 and the horizontal direction of the upper cover 11523 is in the range of 0-65°, the second angle β between the second arc tangent b at the second air outlet 11522 and the horizontal direction of the lower cover 11524 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 second air outlet 11522 is directed towards the smoke inlet 1111.

[0043] See Figure 6 and Figure 7 , Figure 7This is a bottom view of a single-sided air curtain duct provided in some embodiments of this application. In some embodiments, to ensure the pressurization effect of the air curtain duct 1152 and the velocity of the air curtain airflow ejected from the second air outlet 11522, the thickness of the air curtain duct 1152 (i.e., the furthest distance between the upper cover plate 11523 and the lower cover plate 11524) gradually decreases in the direction from the second air inlet 11521 to the second air outlet 11522. The thickness of the air curtain duct 1152 at the second air inlet 11521 is adapted to the size of the first air outlet 11512, and the thickness of the air curtain duct 1152 at the second air outlet 11522, i.e., the minimum thickness of the air curtain duct 1152, is 2mm-8mm. In some embodiments, to ensure the structural stability of the air curtain duct 1152 at the second air outlet 11522, the air curtain duct 1152 is provided with at least one support portion 11525 at the second air outlet 11522, and the support portion 11525 is vertically connected to the upper cover plate 11523 and the lower cover plate 11524. For example... Figure 6 As shown, in some embodiments, the air curtain duct 1152 has three support portions 11525 evenly arranged at the second air outlet 11522. In other embodiments, the air curtain duct 1152 may also have other numbers of support portions 11525, such as four or five, as long as it does not affect the normal ejection of the air curtain airflow. In some embodiments, to facilitate the installation of the air curtain duct 1152 on the range hood 100, the air curtain duct 1152 is also provided with a mounting portion 11526, which is located on the side of the lower cover plate 11524 away from the upper cover plate 11523. Figure 6 As shown, in some embodiments, multiple mounting portions 11526 are respectively provided corresponding to multiple support portions 11525. In other embodiments, the mounting portions 11526 may be provided at other positions of the air curtain duct 1152, depending on the different structures of the range hood 100 and the location of the air curtain duct 1152.

[0044] See Figure 5 and Figure 8 , Figure 8 This is a cross-sectional view of a portion of the structure of a range hood provided in another embodiment of this application. (See attached image.) Figure 5As shown, in some embodiments, the first side panel 1191 of the range hood 100 is provided with a plurality of first air inlets 11911, and the air curtain device 115 draws air in from the side of the smoke collection chamber 110. To further increase the air intake of the air curtain device 115, the total area of ​​the plurality of first air inlets 11911 is greater than 0.5 times the area of ​​the first air inlet 11511 of the air curtain fan 1151. Preferably, the total area of ​​the plurality of first air inlets 11911 is greater than 0.7 times the area of ​​the first air inlet 11511 of the air curtain fan 1151. To prevent the first air inlets 11911 from being blocked by the air curtain fan 1151, and to reduce the resistance of the air curtain fan 1151 in drawing air from the outside of the range hood 100, the distance between the first side panel 1191 and the side of the air curtain fan 1151 closest to the first side panel 1191 is greater than 6 mm. Preferably, the distance between the first side plate 1191 and the side of the air curtain fan 1151 closest to the first side plate 1191 is greater than 8mm. The air curtain device 115 draws air from the side of the smoke collection chamber 110, which prevents the first air inlet 11911 from being blocked when the user installs a hanging cabinet or other device on top of the smoke collection chamber 110, thus ensuring the air curtain device 115 can deliver sufficient airflow and reducing its auxiliary smoke extraction effect. Or as... Figure 8 As shown, the top plate 113 of the range hood 100 is provided with multiple second air inlets 1131. The positions of the multiple second air inlets 1131 are adapted to the positions of the air curtain fan 1151 and the second partition plate 1172. The air curtain device 115 draws air from the top of the smoke collection chamber 110. Similarly, to further increase the air intake of the air curtain device 115, the total area of ​​the multiple second air inlets 1131 is greater than 0.5 times the area of ​​the first air inlet 11511 of the air curtain fan 1151. Preferably, the total area of ​​the multiple second air inlets 1131 is greater than 0.7 times the area of ​​the first air inlet 11511 of the air curtain fan 1151. In other embodiments, multiple first air inlets 11911 and multiple second air inlets 1131 can also be provided in the range hood 100 to meet different user scenarios. In some embodiments, the first air inlet 11911 is hexagonal in shape, and the second air inlet 1131 is elongated. In other embodiments, the first air inlet 11911 and the second air inlet 1131 may be other shapes according to different needs.

[0045] See Figures 1-3In some embodiments, the range hood 100 further includes an exhaust chamber 120, which communicates with a smoke collection chamber 110. The smoke collection chamber 110 and the exhaust chamber 120 are fixedly connected by a flanged flange 1132 on the upper top plate 113, and the width of the exhaust chamber 120 in the horizontal direction is smaller than the width of the smoke collection chamber 110 in the horizontal direction. The range hood 100 is fixedly installed on the wall through the exhaust chamber 120. In some embodiments, the smoke collection chamber 110 can also be positioned as low as possible during installation, so that the smoke inlet 1111 is located closer to the pot, in order to improve the smoke extraction effect. A main fan 121 is provided in the exhaust chamber 120, thereby generating negative pressure in the range hood 100 cavity through the main fan 121 and drawing in cooking fumes through the smoke inlet 1111. The exhaust chamber 120 further includes a second back plate 122, a frame 123, and a front cover 124. When the range hood 100 is fixedly installed on the wall, the second back plate 122 is positioned close to the wall, and the main fan 121 is mounted on the frame 123. The main air inlet 1211 of the main fan 121 faces the second back plate 122, and there is a certain distance between the main air inlet 1211 and the second back plate 122. In some embodiments, the distance between the main air inlet 1211 and the second back plate 122 is not less than 80mm, 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.

[0046] In some embodiments, to ensure the uniformity of the airflow from the second air outlet 11522 perpendicular to the air outlet direction—that is, the uniformity of the airflow from the second air outlet 11522 in the left-right width direction facing the range hood 100 after installation—and to reduce the size of the air curtain fan 1151 and the air curtain duct 1152, the range hood 100 includes two air curtain devices 115, which are symmetrically arranged on both sides of the smoke collection chamber 110 relative to the smoke exhaust chamber 120. In the direction perpendicular to the air outlet direction, i.e., in the left-right width direction facing the range hood 100 after installation, the total width of the airflow from the two air curtain devices 115 is greater than 450mm. Preferably, the total width of the airflow from the two air curtain devices 115 is 500mm-850mm. In some embodiments, the length of the second air outlet 11522 of the single-sided air curtain device 115, that is, the width of the second air outlet 11522 perpendicular to the air outlet direction, is 180mm-450mm. Specifically, when the range hood 100 is mounted, the width of the second air outlet 11522 facing the range hood 100 in the left-right width direction is 180mm-450mm. Preferably, the width of the second air outlet 11522 perpendicular to the air outlet direction is 200mm-370mm. In some embodiments, to further improve the uniformity of the airflow emitted from the air curtain duct 1152 perpendicular to the air outlet direction, the length of the air curtain duct 1152 in the air inlet direction can be extended according to the specific structure of the range hood 100.

[0047] See Figure 1 , Figure 2 and Figure 9 , Figure 9This is a schematic diagram of the structure of the condenser plate provided in some embodiments of this application. In some embodiments, the range hood 100 further includes a condenser plate 130, which is disposed on the side of the smoke collection plate 111 away from the range hood 100, that is, the condenser plate 130 is disposed on the smoke collection side of the smoke collection plate 111, and the condenser plate 130 covers the smoke inlet 1111. The condenser plate 130 includes a plurality of upper smoke inlets 131 and a plurality of lower smoke inlets 132. In some embodiments, the air outlet 11522 is oriented towards the upper smoke inlets 131, that is, the angles of the first included angle θ, the second included angle β, and the third included angle α need to be smaller. Thus, some of the oil fumes can enter the smoke inlet 1111 through the lower smoke inlets 132 and be sucked in and discharged by the range hood 100. The remaining oil fumes can be carried to the upper smoke inlets 131 through the air curtain device 115, and then enter the smoke inlet 1111 through the upper smoke inlets 131 and be sucked in and discharged by the range hood 100. In some embodiments, the condenser plate 130 can be fixedly installed on the smoke collection plate 111. In other embodiments, the condenser plate 130 can also rotate relative to the smoke collection plate 111. Simultaneously, depending on different usage scenarios, the condenser plate 130 can be set to be parallel to the smoke collection plate 111, or the condenser plate 130 can be set to be at a certain angle to the smoke collection plate 111. In some embodiments, to prevent the condenser plate 130 from blocking the smoke inlet 1111 and causing a decrease in the smoke extraction capacity of the range hood 100, the distance between the condenser plate 130 and the smoke collection plate 111 is set to be greater than 40mm. Preferably, the distance between the condenser plate 130 and the smoke collection plate 111 is not less than 50mm.

[0048] See Figure 2 In some embodiments, the range hood 100 further includes an electronic control module 140 and a check valve 150. The electronic control module 140 is located on the side of the exhaust chamber 120 away from the smoke collection chamber 110, and is electrically connected to both the main fan 121 and the air curtain fan 1151 to control the operation of the range hood 100. The check valve 150 is connected to the main air outlet 1212 of the main fan 121. Furthermore, to improve the aesthetics of the range hood 100, it also includes a decorative cover (not shown in the figure), which surrounds the front cover 124 and the sides of the frame 123. See also... Figures 1-2 In some embodiments, the smoke collection chamber 110 also includes an oil cup 118, which is located on the side of the smoke collection plate 111 away from the lower top plate 114, and is used to collect the oil condensed on the smoke collection plate 111 or the condensation plate 130 to prevent the oil from dripping into the pot or the stove.

[0049] The range hood 100 provided in this application includes: a smoke collection chamber 110 with a smoke inlet 1111; an air curtain device 115, which is disposed at the top of the smoke collection chamber 110 and located on the smoke inlet side of the smoke collection chamber 110; the air curtain device 115 includes an air curtain fan 1151, which includes a first air inlet 11511, which is disposed on the side of the air curtain fan 1151 near the smoke inlet 1111, and the air outlet direction of the air curtain device 115 is towards the smoke inlet 1111. The range hood 100 provided in this application uses an air curtain device 115 to assist in smoke extraction. At the same time, the downward orientation of the air inlet of the air curtain device 115 makes the structure of the range hood 100 more compact. This not only provides sufficient installation space for lighting, control and other components, but also reduces the noise generated by the air curtain fan 1151 from being directly transmitted through the first air inlet 11911 or the second air inlet 1131, thereby reducing the operating noise of the range hood 100 to a certain extent.

[0050] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A range hood, characterized in that, include: The smoke collection chamber is equipped with a smoke inlet; An air curtain device is provided at the top of the smoke collection chamber and located on the smoke inlet side of the smoke collection chamber; The air curtain device includes an air curtain fan, the air curtain fan includes a first air inlet, the first air inlet is located on the side of the air curtain fan near the smoke inlet, and the air outlet of the air curtain device is directed toward the smoke inlet.

2. The range hood according to claim 1, characterized in that, The air curtain device includes: An air curtain duct includes a second air outlet, an upper cover plate, and a lower cover plate. The upper cover plate is located on the side of the air curtain duct away from the smoke inlet, and the lower cover plate is located on the side of the air curtain duct closer to the smoke inlet. The upper cover plate and the lower cover plate form the air cavity of the air curtain duct. The first angle between the first arc tangent of the upper cover plate at the second air outlet and the horizontal direction is 0-70°, and the second angle between the second arc tangent of the lower cover plate at the second air outlet and the horizontal direction is 0-45°.

3. The range hood according to claim 2, characterized in that, The third included angle between the first tangent to the first arc and the second tangent to the second arc is 0-20°.

4. The range hood according to claim 2, characterized in that, The first air inlet and the second air outlet are connected to the outside of the range hood; The air curtain duct also includes a second air inlet, which is located at the end of the air curtain duct away from the second air outlet; The air curtain fan also includes a first air outlet, which is connected to the second air inlet.

5. The range hood according to claim 4, characterized in that, The distance between the upper cover plate and the lower cover plate gradually decreases along the direction from the second air inlet to the second air outlet, and the distance between the upper cover plate and the lower cover plate at the second air outlet is 2mm-8mm.

6. The range hood according to claim 5, characterized in that, The smoke collection chamber includes: The top plate is located on the side of the smoke collection chamber away from the smoke inlet. The lower top plate is located on the side of the smoke collection chamber near the smoke inlet; Side plates are disposed on both sides of the smoke collection chamber, and the side plates connect the upper top plate and the lower top plate; A front side plate is disposed at the top of the smoke collection chamber near the smoke inlet, and is connected to the upper top plate, the lower top plate, and the side plate respectively; An isolation section is disposed between the upper top plate and the lower top plate, and is disposed opposite to the side plate and the front side plate; The air curtain fan is disposed in the space formed by the upper top plate, the lower top plate, the side plate, the front side plate and the isolation section.

7. The range hood according to claim 6, characterized in that, The isolation unit includes: A first isolation plate and a second isolation plate, wherein the first isolation plate is disposed on the side of the air curtain fan away from the front side plate, and the second isolation plate is disposed on the side of the air curtain fan away from the side plate.

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

9. The range hood according to claim 8, characterized in that, The side plate is provided with a plurality of first air inlets, the air curtain device draws air from the side of the smoke collection chamber, the distance between the side plate and the side of the air curtain fan closest to the side plate is greater than 6 mm, and the total area of ​​the plurality of first air inlets is greater than 0.5 times the area of ​​the first air inlet.

10. The range hood according to claim 8, characterized in that, The top plate is provided with multiple second air inlets, and the air curtain device draws air from the top of the smoke collection chamber. The total area of ​​the multiple second air inlets is greater than 0.5 times the area of ​​the first air inlet.

11. The range hood according to claim 2, characterized in that, Also includes: The smoke exhaust chamber is connected to the smoke collection chamber, and the main fan of the range hood is located in the smoke exhaust chamber; The width of the exhaust chamber is smaller than the width of the smoke collection chamber. The range hood includes two air curtain devices, which are symmetrically arranged on both sides of the smoke collection chamber relative to the exhaust chamber.

12. The range hood according to claim 11, characterized in that, The width of the second air outlet perpendicular to the air outlet direction is 180-450mm; The total width of the air curtain emitted by the two air curtain devices is greater than 450 mm.

13. The range hood according to any one of claims 1-12, characterized in that, Also includes: A condenser plate is disposed on the side of the smoke inlet away from the range hood. The side of the condenser plate near the air curtain device has an upper smoke inlet hole, and the air outlet direction of the air curtain device corresponds to the upper smoke inlet hole.

14. The range hood according to claim 13, characterized in that, The distance between the condenser plate and the smoke inlet is greater than 40mm.

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