Installation structure of air curtain assembly and range hood

Abstract

The utility model discloses a mounting structure of an air curtain assembly and a range hood. The mounting structure of the air curtain assembly comprises a top plate and the air curtain assembly, an air curtain air outlet is formed in the top plate, and at least the surface, provided with the air curtain air outlet, of the top plate protrudes upwards relative to other parts of the top plate to form a protruding part; the air curtain assembly comprises an air curtain support, a cyclone seat and an air curtain fan, an avoiding opening is formed in the air curtain support, the air curtain support is arranged on the top plate, the avoiding opening avoids the protruding part, the cyclone seat is arranged on the air curtain support, an air outlet channel communicated with the air curtain air outlet is formed in the cyclone seat, the air curtain fan is arranged on the cyclone seat, and the air outlet end of the air curtain fan faces the air outlet channel. According to the installation structure of the air curtain assembly, the avoiding opening is formed in the air curtain support, the influence of the protruding part on the top plate on installation of the air curtain support can be avoided, and therefore the overall installation convenience of the air curtain assembly can be improved.

Description

Technical Field

[0001] This utility model relates to the field of smoke machine technology, specifically to an installation structure for an air curtain assembly and a smoke machine. Background Technology

[0002] An air curtain assembly is installed above the top panel of the range hood. This assembly directs airflow downwards through air curtain vents on the top panel, creating an air curtain below the panel to reduce the escape of cooking fumes. In existing technology, to reduce the adhesion of cooking fumes to the air curtain assembly, a cavity is created on the lower surface of the top panel, with the air curtain vents located within this cavity. However, this cavity creates a corresponding bulge on the upper surface of the top panel, affecting the installation of the air curtain assembly. Utility Model Content

[0003] The purpose of this utility model is to provide an installation structure for an air curtain assembly, which solves the above-mentioned technical problems.

[0004] The installation structure of the air curtain assembly proposed in this utility model is used for a smoke machine, including a top plate and an air curtain assembly; the top plate is provided with an air curtain outlet, and the surface of the top plate with at least the air curtain outlet is raised upward relative to the other parts of the top plate to form a raised part; the air curtain assembly includes an air curtain bracket, a cyclone seat and an air curtain fan, the air curtain bracket is provided with a clearance opening, the air curtain bracket is located on the top plate, the clearance opening avoids the raised part, the cyclone seat is located on the air curtain bracket, the cyclone seat is provided with an air outlet channel communicating with the air curtain outlet, the air curtain fan is located on the cyclone seat, and the air outlet end of the air curtain fan faces the air outlet channel.

[0005] According to one embodiment of the present invention, the length of the raised portion in the left-right direction is not less than the length of the clearance opening on the air curtain support, and the clearance opening passes through one end of the air curtain support along the length direction of the air curtain support to avoid the raised portion.

[0006] According to one embodiment of the present invention, the end of the air curtain support through which the clearance opening is penetrated is provided with a support part, the support part arches upward and avoids the raised part, and the corresponding end of the cyclone seat is provided with a connecting part, which is connected to the support part.

[0007] According to one embodiment of the present invention, the two sides of the clearance opening of the air curtain support are provided with vertical walls, and a snap-fit ​​plate extending to the opposite side is provided on the vertical wall near the end of the air curtain support that is not penetrated by the clearance opening. The bottom of the cyclone seat is provided with a first buckle that is adapted to the snap-fit ​​plate, and the first buckle snaps into the snap-fit ​​plate.

[0008] According to one embodiment of the present invention, the snap-fit ​​plate forms an angle α with the horizontal plane, where 0° < α < 10°.

[0009] According to one embodiment of the present invention, the width of one end of the snap-fit ​​plate facing the first snap-fit ​​to which it snaps is a, and the width of the other end is b, where 0 < a < b.

[0010] According to one embodiment of the present invention, two sets of first buckles are mirror-imagely provided at the left and right ends of the bottom of the cyclone seat, so that the air curtain bracket and the cyclone seat of the two sets of air curtain components are common parts.

[0011] According to one embodiment of the present invention, the cyclone seat is provided with a first connecting hole on the front side and a second buckle on the rear side. The air curtain fan is a cross-flow fan. The cross-flow fan's volute base plate is provided with a second connecting hole on the front side. The cross-flow fan's volute base plate is placed on the cyclone seat, and its rear side is engaged with the second buckle. The second connecting hole on its front side is aligned with the first connecting hole and connected by screws.

[0012] This utility model also proposes a smoke hood that adopts the air curtain assembly installation structure described above. The smoke hood includes a housing and an air collecting box assembly. The housing has a cover plate with an installation port on the cover plate. The air collecting box assembly is installed inside the housing and extends out of the housing from the installation port. The portion of the housing between the cover plate and the top plate forms an electrical control cavity. The air curtain assembly is located inside the electrical control cavity. There is a first gap between the air collecting box assembly and the installation port, and the first gap communicates with the electrical control cavity. When the air curtain assembly is working, external air enters the electrical control cavity through the first gap between the air collecting box assembly and the installation port, and is then discharged by the air curtain assembly through the air curtain outlet.

[0013] According to one embodiment of the present invention, the smoke hood also includes a surrounding plate, a cover plate having a support groove around the mounting opening, the surrounding plate being installed in the support groove, the surrounding plate being arranged around the air collecting box assembly, and a second gap being formed between the surrounding plate and the outer wall of the air collecting box assembly, through which external air enters the first gap.

[0014] Compared with the prior art, the installation structure of the air curtain assembly of this utility model has the following advantages:

[0015] The installation structure of the air curtain assembly of this utility model has a raised portion on the top plate with at least one air curtain outlet, which is raised upward relative to the other parts of the top plate. This is to meet the new appearance requirements of the range hood. In order to adapt to the requirements of the new appearance, the air curtain bracket is provided with a clearance opening to avoid the raised portion, so that the air curtain bracket can be installed at the air curtain outlet on the top plate. This avoids the raised portion on the top plate from affecting the installation of the air curtain bracket, thereby improving the overall installation convenience of the air curtain assembly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation structure of the air curtain assembly of this utility model;

[0017] Figure 2 This is a schematic diagram of the installation structure of the air curtain component of this utility model from another direction;

[0018] Figure 3 This is an exploded view of the structure of the air curtain component in this utility model;

[0019] Figure 4 for Figure 3 A magnified view of a section at point A in the middle;

[0020] Figure 5 This is a schematic diagram showing the connection relationship between the wind curtain support and the top plate in this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the smoke hood of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the smoke hood of this utility model from another direction;

[0023] Figure 8 This is a schematic diagram of the structure of the smoke hood of this utility model after the surrounding panel has been removed;

[0024] Figure 9 This is a structural cross-sectional view of the smoke hood of this utility model;

[0025] Figure 10 for Figure 9 A magnified view of a section at point B in the middle;

[0026] Figure 11 This is a structural cross-sectional view of another embodiment of the smoke hood of this utility model.

[0027] In the diagram: a. First gap, b. Second gap, 01. Main body of the smoke machine, 02. Air collection box assembly, 03. Enclosure, 1. Top plate, 11. Air curtain outlet, 12. Raised part, 2. Air curtain assembly, 21. Air curtain bracket, 211. Clearance opening, 212. Vertical wall, 213. Clip plate, 214. Support part, 22. Cyclone seat, 221. Air outlet channel, 222. First buckle, 223. Connecting part, 224. First connecting hole, 225. Second buckle, 23. Air curtain fan, 231. Second connecting hole, 3. Cover plate, 31. Support groove.

[0028] The implementation and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] To further understand the content, features, and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings:

[0033] This utility model discloses an installation structure for an air curtain assembly used in a smoke hood. Please refer to [link / reference]. Figures 1 to 5 The installation structure of the air curtain assembly proposed in this utility model includes a top plate 1 and an air curtain assembly 2. The top plate 1 is provided with an air curtain outlet 11. The surface of the top plate 1 with at least the air curtain outlet 11 is raised upward relative to the other parts of the top plate 1 to form a raised part 12. The air curtain assembly 2 includes an air curtain bracket 21, a cyclone seat 22 and an air curtain fan 23. The air curtain bracket 21 is provided with a clearance opening 211. The air curtain bracket 21 is located on the top plate 1. The clearance opening 211 avoids the raised part 12. The cyclone seat 22 is located on the air curtain bracket 21. The cyclone seat 22 is provided with an air outlet channel 221 that communicates with the air curtain outlet 11. The air curtain fan 23 is located on the cyclone seat 22. The air outlet end of the air curtain fan 23 faces the air outlet channel 221. The installation structure of the air curtain assembly of this utility model has a raised portion 12 formed by the surface of the top plate 1 having at least an air curtain outlet 11 that is raised upward relative to the other parts of the top plate 1. This is to meet the new appearance requirements of the range hood. In order to adapt to the new appearance requirements, the air curtain bracket 21 is provided with a clearance opening 211 to avoid the raised portion 12, so that the air curtain bracket 21 can be installed at the air curtain outlet 11 of the top plate 1. This avoids the raised portion 12 on the top plate 1 from affecting the installation of the air curtain bracket 21, thereby improving the overall installation convenience of the air curtain assembly 2.

[0034] In this embodiment, the raised portion 12 is formed on the upper surface of the top plate 1, and the lower surface of the top plate 1 is recessed with a cavity corresponding to the raised portion 12. The air curtain outlet 11 is disposed in the cavity, and the air curtain outlet 11 penetrates through the upper and lower surfaces of the top plate 1. The air curtain assembly 2 is installed on the upper surface of the top plate 1 and located at the air curtain outlet 11. The air curtain bracket 21 is used to support the cyclone seat 22 and the air curtain fan 23 above the air curtain outlet 11. The air curtain bracket 21 is connected to the surface of the top plate 1 around the raised portion 12, which is located within the clearance opening 211. Thus, the air curtain bracket 21 can bypass the raised portion 12 through the clearance opening 211 and connect to the top plate 1, achieving stable installation of the air curtain bracket 21 on the top plate 1. After the air curtain bracket 21 is connected to the top plate 1, the cyclone seat 22 is installed on the air curtain bracket 21, and then the air curtain fan 23 is installed on the cyclone seat 22, thereby achieving stable installation of the entire air curtain assembly 2 on the top plate 1. The clearance opening 211 also connects the air outlet channel 221 of the cyclone seat 22 to the air curtain outlet 11, allowing the airflow blown by the air curtain fan 23 towards the air outlet channel 221 to flow through the clearance opening 211 to the air curtain outlet 11, and then flow down the top plate 1 to form an air curtain. By setting an avoidance opening 211 on the air curtain bracket 21, the protrusion 12 on the top plate 1 can be prevented from affecting the installation of the air curtain bracket 21, thereby improving the overall installation convenience of the air curtain assembly 2.

[0035] Please refer to Figures 1 to 4 In the installation structure of the air curtain assembly of this utility model, the length of the raised part 12 in the left and right direction is not less than the length of the avoidance opening 211 on the air curtain bracket 21. The avoidance opening 211 passes through one end of the air curtain bracket 21 along the length direction of the air curtain bracket 21 to avoid the raised part 12.

[0036] The raised portion 12 extends along the length of the top plate 1, and the lower surface of the top plate 1 forms a long, narrow cavity corresponding to the raised portion 12. There can be two air curtain outlets 11, both of which are located within the cavity and spaced apart along its length. There are two sets of air curtain components 2, each corresponding to one of the two air curtain outlets 11, mounted on the top plate 1. Taking a left-right arrangement of the two sets of air curtain components 2 on the top plate 1 as an example, the two sets of air curtain components 2 can be defined as the first air curtain component and the second air curtain component, respectively. The air curtain support of the first air curtain component is defined as the first air curtain support, and the air curtain support of the second air curtain component is defined as the second air curtain support. Both the first and second air curtain supports have clearance openings 211. The clearance opening 211 of the first air curtain support penetrates through the right end of the first air curtain support, and the clearance opening 211 of the second air curtain support penetrates through the left end of the second air curtain support. The left end of the clearance opening 211 of the first air curtain support corresponds to the left end of the clearance 12, the right end of the clearance opening 211 of the second air curtain support corresponds to the right end of the clearance 12, and the right end of the first air curtain support and the left end of the second air curtain support both avoid the middle part of the clearance 12.

[0037] Thus, by using two sets of air curtain components 2 and two air curtain outlets 11, the number of air curtains below the top plate 1 can be increased to improve the effect of preventing the escape of oil fumes. By having the two air curtain outlets 11 located on the same raised portion 12, only one raised portion 12 needs to be formed during the fabrication of the top plate 1, thus simplifying the fabrication process. By extending the clearance opening 211 through one end of the air curtain bracket 21, the clearance opening 211 can avoid raised portions 12 whose length is greater than the length of the air curtain bracket 21, ensuring that both air curtain brackets 21 can be easily installed on the top plate 1.

[0038] Please refer to Figure 3 and Figure 4 The installation structure of the air curtain assembly of this utility model includes a support portion 214 at one end of the air curtain bracket 21 through which the clearance opening 211 passes. The support portion 214 arches upward and avoids the raised portion 12. The corresponding end of the cyclone seat 22 has a connecting portion 223, which is connected to the support portion 214. The support portion 214 is located above the raised portion 12, and the connecting portion 223 overlaps the upper surface of the support portion 214. The support portion 214 can have a connecting hole, and the connecting portion 223 has a corresponding through hole. The through hole and the connecting hole are connected by fasteners to achieve a fixed connection between the connecting portion 223 and the support portion 214.

[0039] Please refer to Figure 3 and Figure 4The installation structure of the air curtain assembly of this utility model has vertical walls 212 on both sides of the clearance opening 211 of the air curtain bracket 21. On the vertical wall 212 near the end of the air curtain bracket 21 that is not penetrated by the clearance opening 211, there is a snap-fit ​​plate 213 extending to the opposite side. The bottom of the cyclone seat 22 is provided with a first buckle 222 that is adapted to the snap-fit ​​plate 213. The first buckle 222 snaps into the snap-fit ​​plate 213.

[0040] The bottom side of the vertical wall 212 is connected to the two long side edges of the clearance opening 211, and the snap-fit ​​plate 213 is connected to the top side of the vertical wall 212. The snap-fit ​​plate 213 is close to the end of the air curtain bracket 21 that is not penetrated by the clearance opening 211. The two snap-fit ​​plates 213 are arranged side by side. The number and position of the first buckles 222 correspond to the snap-fit ​​plates 213. The two first buckles 222 are snapped into the two snap-fit ​​plates 213 respectively, so that the cyclone seat 22 and the air curtain bracket 21 can be snapped and fixed.

[0041] Please refer to Figure 4 In the installation structure of the air curtain assembly of this utility model, the snap-fit ​​plate 213 forms an angle α with the horizontal plane, where 0° < α < 10°. The distance between the two snap-fit ​​plates 213 and the upper surface of the top plate 1 decreases from the sides of the two snap-fit ​​plates 213 that are close to each other to the sides that are far apart from each other, so that the sides of the two snap-fit ​​plates 213 that are close to each other can be slightly tilted upwards, thereby guiding the first buckle 222 and enabling the first buckle 222 to be snapped and fixed with the snap-fit ​​plate 213 more quickly and conveniently.

[0042] Please refer to Figure 4 In the installation structure of the air curtain assembly of this utility model, the width of one end of the snap-fit ​​plate 213 facing the first snap-fit ​​222 that snaps into it is a, and the width of the other end is b, where 0 < a < b.

[0043] The first latch 222 is latched onto the latching plate 213 from one end along its length. The width of the latching plate 213 increases from the end that latches onto the first latch 222 toward the end that moves away from the first latch 222. This makes the distance between the two latching plates 213 decrease from the end that latches onto the first latch 222 toward the end that moves away from the first latch 222. This guides the part of the cyclone seat 22 that is latched between the two latching plates 213, improving the ease of fitting between the cyclone seat 22 and the two latching plates 213.

[0044] Please refer to Figure 3 The installation structure of the air curtain assembly of this utility model has two sets of first buckles 222 mirrored at the bottom left and right ends of the cyclone seat 22, making the air curtain bracket 21 and the cyclone seat 22 of the two sets of air curtain assemblies 2 universal components.

[0045] Based on the above embodiments of the first and second air curtain components, the cyclone seat of the first air curtain component is defined as the first cyclone seat, and the cyclone seat of the second air curtain component is defined as the second cyclone seat. The first air curtain support and the second air curtain support have the same structure, and the first cyclone seat and the second cyclone seat also have the same structure.

[0046] When installing the left air curtain assembly, any air curtain bracket 21 can be selected as the first air curtain bracket and installed at the left air curtain outlet 11. The left end of the clearance opening 211 of the first air curtain bracket corresponds to the left end of the clearance protrusion 12, and the clearance opening 211 of the first air curtain bracket penetrates the right end of the first air curtain bracket.

[0047] When installing the right-side air curtain assembly, any air curtain bracket 21 can be selected as the second air curtain bracket and installed at the right-side air curtain outlet 11. At this time, the two ends of the second air curtain bracket need to be reversed relative to the first air curtain bracket, that is, the right end of the clearance opening 211 of the second air curtain bracket corresponds to the right end of the clearance protrusion 12, and the clearance opening 211 of the second air curtain bracket penetrates the left end of the second air curtain bracket.

[0048] After the first air curtain bracket on the left is installed, the snap-fit ​​plate 213 on the first air curtain bracket is located near the left end of the first air curtain bracket. After the second air curtain bracket on the right is installed, the snap-fit ​​plate 213 on the second air curtain bracket is located near the right end of the second air curtain bracket.

[0049] When installing the left cyclone seat, any cyclone seat 22 can be selected as the first cyclone seat. Since the bottom left and right ends of the cyclone seat 22 are mirrored with two sets of first buckles 222, the left and right ends of the cyclone seat 22 can arbitrarily correspond to the left and right ends of the air curtain bracket 21. When the first cyclone seat is installed on the first air curtain bracket, it is fixed by the first buckle 222 on the left end to the snap-fit ​​plate 213 on the first air curtain bracket.

[0050] When installing the right-side cyclone seat, any cyclone seat 22 can be selected as the second cyclone seat. Since the bottom left and right ends of the cyclone seat 22 are mirrored with two sets of first buckles 222, the left and right ends of the second cyclone seat do not need to be reversed relative to the left and right ends of the first cyclone seat. When the second cyclone seat is installed on the second air curtain bracket, it is secured by the first buckle 222 on the right end to the snap-fit ​​plate 213 on the second air curtain bracket.

[0051] By setting the air curtain bracket 21 and the cyclone seat 22 as universal parts, operators do not need to distinguish between the parts when installing the left and right air curtain components 2. They only need to make simple distinctions between the left and right ends of the air curtain bracket 21 when installing the air curtain bracket 21, which simplifies the installation process of the air curtain component 2 and improves the ease of installation.

[0052] Please refer to Figure 3The installation structure of the air curtain assembly of this utility model has a first connecting hole 224 on the front side of the cyclone seat 22 and a second buckle 225 on the rear side. The air curtain fan 23 is a cross-flow fan. The front side of the volute base plate of the cross-flow fan has a second connecting hole 231. The volute base plate of the cross-flow fan is placed on the cyclone seat 22, and its rear side is engaged with the second buckle 225. The second connecting hole 231 on its front side is aligned with the first connecting hole 224 and connected by screws.

[0053] It should be noted that when installing the cyclone seat 22, the installation orientation of the left cyclone seat 22 and the right cyclone seat 22 is the same, that is, the first connecting hole 224 should be in front and the second buckle 225 should be in the back. Therefore, when installing the cyclone seat 22, the operator also needs to make a simple distinction between the front and back sides of the cyclone seat 22.

[0054] After the cyclone base 22 is installed, when installing the cross-flow fan, the rear side of the volute base plate of the cross-flow fan can be inserted into the second clip 225 to achieve pre-fixation between the cross-flow fan and the cyclone base 22. After the rear side of the volute base plate of the cross-flow fan is engaged with the second clip 225, the second connecting hole 231 on its front side is aligned with the first connecting hole 224 on the cyclone base 22. At this time, the first connecting hole 224 and the second connecting hole 231 can be connected by screws to achieve a fixed connection between the cross-flow fan and the cyclone base 22.

[0055] It should be noted that when installing cross-flow fans, the motor of the left cross-flow fan needs to be located at the right end, and the motor of the right cross-flow fan needs to be located at the left end. Therefore, the operator needs to make a simple distinction between the two cross-flow fans when installing them.

[0056] Please refer to Figures 6 to 11 This utility model also proposes a smoke hood, which adopts the air curtain assembly installation structure described above. The smoke hood includes a housing 01 and an air collecting box assembly 02. The housing 01 has a cover plate 3, and the cover plate 3 of the housing 01 is provided with an installation port. The air collecting box assembly 02 is installed inside the housing 01 and extends out of the housing 01 from the installation port. The part of the housing 01 located between the cover plate 3 and the top plate 1 forms an electrical control cavity. The air curtain assembly 2 is located in the electrical control cavity. There is a first gap a between the air collecting box assembly 02 and the installation port. The first gap a communicates with the electrical control cavity. When the air curtain assembly 2 is working, the outside air enters the electrical control cavity through the first gap a between the air collecting box assembly 02 and the installation port, and is then discharged by the air curtain assembly 2 through the air curtain outlet 11.

[0057] The electrical control cavity is located on the front side of the mounting port, that is, on the front side of the air collecting box assembly 02 and the first gap a. The first gap a is formed between the front edge of the air collecting box assembly 02 and the mounting port. When the air curtain assembly 2 is working, the outside air enters the electrical control cavity through the first gap a, and is then discharged by the air curtain assembly 2 through the air curtain outlet 11. In this way, it is not necessary to open an air inlet on the top plate 1 to communicate with the electrical control cavity, thereby simplifying the structure of the cover plate 3 and preventing external dust and other debris from easily falling into the electrical control cavity.

[0058] Please refer to Figures 6 to 11 The smoke hood of this utility model also includes a surrounding plate 03. The cover plate 3 is provided with a support groove 31 around the mounting opening. The surrounding plate 03 is installed in the support groove 31. The surrounding plate 03 is arranged around the air collecting box assembly 02. There is a second gap b between the surrounding plate 03 and the outer wall surface of the air collecting box assembly 02. External air enters the first gap a through the second gap b.

[0059] The enclosure 03 conceals and protects the air collecting box assembly 02 and the second gap b, preventing the first gap a from being directly exposed to the user's view, thus serving a decorative purpose for the range hood. The second gap b extends along the height of the air collecting box assembly 02. The top part of the second gap b communicates with the outside air, and the bottom part of the second gap b communicates with the first gap a. When the air curtain assembly 2 is working, outside air enters the second gap b from the top of the air collecting box assembly 02 and the enclosure 03, then enters the first gap a through the second gap b, and then enters the electrical control cavity through the first gap a, before being discharged by the air curtain assembly 2 through the air curtain outlet 11.

[0060] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An installation structure for an air curtain assembly, used in a smoke machine, characterized in that, include: A top plate (1) is provided with an air curtain outlet (11). The surface of the top plate (1) with at least the air curtain outlet (11) is raised upward relative to the other parts of the top plate (1) to form a raised part (12). An air curtain assembly (2) includes an air curtain support (21), a cyclone seat (22), and an air curtain fan (23). The air curtain support (21) is provided with a clearance opening (211). The air curtain support (21) is located on the top plate (1). The clearance opening (211) avoids the raised part (12). The cyclone seat (22) is located on the air curtain support (21). The cyclone seat (22) is provided with an air outlet channel (221) that communicates with the air curtain outlet (11). The air curtain fan (23) is located on the cyclone seat (22). The air outlet end of the air curtain fan (23) faces the air outlet channel (221).

2. The installation structure of the air curtain assembly according to claim 1, characterized in that, The length of the raised portion (12) in the left-right direction is not less than the length of the clearance opening (211) on the air curtain support (21). The clearance opening (211) passes through one end of the air curtain support (21) along the length direction of the air curtain support (21) to avoid the raised portion (12).

3. The installation structure of the air curtain assembly according to claim 2, characterized in that, The air curtain support (21) has a support part (214) at one end through which the avoidance opening (211) passes. The support part (214) arches upward and avoids the raised part (12). The corresponding end of the cyclone seat (22) has a connecting part (223) which is connected to the support part (214).

4. The installation structure of the air curtain assembly according to claim 1, characterized in that, The air curtain support (21) has vertical walls (212) on both sides of the clearance opening (211). The vertical wall (212) near the end of the air curtain support that is not penetrated by the clearance opening (211) has a snap-fit ​​plate (213) extending to the opposite side. The bottom of the cyclone seat (22) has a first buckle (222) that is adapted to the snap-fit ​​plate (213). The first buckle (222) snaps into the snap-fit ​​plate (213).

5. The installation structure of the air curtain assembly according to claim 4, characterized in that, The snap-fit ​​plate (213) forms an angle α with the horizontal plane, where 0° < α < 10°.

6. The installation structure of the air curtain assembly according to claim 4, characterized in that, The width of the snap-fit ​​plate (213) at one end facing the first snap-fit ​​(222) is a, and the width of the other end is b, where 0 < a < b.

7. The installation structure of the air curtain assembly according to claim 4, characterized in that, The bottom left and right ends of the cyclone seat (22) are provided with two sets of the first buckles (222), so that the air curtain bracket (21) and the cyclone seat (22) of the two sets of air curtain components (2) are common parts.

8. The installation structure of the air curtain assembly according to claim 1, characterized in that, The cyclone seat (22) has a first connecting hole (224) on the front side and a second buckle (225) on the rear side. The air curtain fan (23) is a cross-flow fan. The volute base plate of the cross-flow fan has a second connecting hole (231) on the front side. The volute base plate of the cross-flow fan is placed on the cyclone seat (22), and its rear side is engaged with the second buckle (225). The second connecting hole (231) on its front side is aligned with the first connecting hole (224) and connected by screws.

9. A smoke hood, employing the installation structure of the air curtain assembly as described in any one of claims 1 to 8, characterized in that, The device includes a housing (01) and an air collection box assembly (02). The housing (01) has a cover plate (3) with an installation port on the cover plate (3). The air collection box assembly (02) is installed inside the housing and extends out of the housing (01) from the installation port. The portion of the housing (01) between the cover plate (3) and the top plate (1) forms an electrical control cavity. The air curtain assembly (2) is located inside the electrical control cavity. The air collection box assembly (02) and the installation port have a first gap (a) that communicates with the electrical control cavity. When the air curtain assembly (2) is working, external air enters the electrical control cavity through the first gap (a) between the air collection box assembly (02) and the installation port, and is then discharged by the air curtain assembly (2) through the air curtain outlet (11).

10. The range hood according to claim 9, characterized in that, It also includes a surrounding plate (03), the cover plate (3) is provided with a support groove (31) around the mounting opening, the surrounding plate (03) is installed in the support groove (31), the surrounding plate (03) is arranged around the air collecting box assembly (02), and there is a second gap (b) between the surrounding plate (03) and the outer wall surface of the air collecting box assembly (02), through which external air enters the first gap (a).

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