Range hood
By introducing air curtain components and multi-layer air intake structures into the range hood, the problem of oil fume escape is solved, achieving more efficient oil fume purification and improving user experience.
Patent Information
- Application Number
- CN202422950255.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing side-suction range hoods generate oil smoke quickly when stir-frying, resulting in the oil smoke not being sucked out in time and escaping upward along the suction panel, affecting the purification effect and reducing the user experience.
A range hood is designed, including a range hood main body, an air curtain assembly and a lighting assembly. The air curtain assembly forms an air curtain in front of the front panel. An air curtain outlet and an air inlet are provided between the top plate and the cover plate. The top air suction port cooperates with the side air suction port to form a smoke-collecting structure, thereby increasing the residence time of oil smoke and preventing the oil smoke from escaping through multiple air suction ports and side baffles.
It effectively reduces the escape of oil smoke, improves the oil smoke suction effect, and improves the user experience. Through the air curtain assembly and multi-layer air suction port structure, it ensures that the oil smoke is fully sucked into the smoke collection chamber, thereby improving the purification capacity of the range hood.
Smart Images
Figure CN223448444U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to kitchen appliance technical field, specifically, relate to a range hood. BACKGROUND
[0002] When the user carries out cooking operation, a large amount of oil fume is generated, and the oil fume diffused in the cooking space will pollute the cooking space, and the cooking personnel working in the environment full of oil fume will inhale the oil fume for a long time, and the health will be harmed. The range hood is an electric appliance for discharging the oil fume generated by the user cooking out of the kitchen, and the range hood is located above the stove, and when the user carries out cooking operation, the oil fume generated by cooking is discharged out of the kitchen, and a healthy cooking environment is provided for the user. The existing side suction type range hood is provided with a side suction port on the air suction panel, the side suction port is closer to the stove, and the oil fume can be discharged out of the kitchen faster, but when the user performs explosive frying, the generation speed of the oil fume is relatively fast, and a large amount of oil fume rushes to the side suction port, and the oil fume that cannot be sucked by the side suction port will escape upward along the air suction panel, which affects the purification effect of the range hood on the oil fume and reduces the user experience. SUMMARY
[0003] The utility model aims at providing a range hood, which is used to solve the above technical problems.
[0004] The range hood provided by the utility model comprises a range hood main body and an air curtain assembly, the range hood main body has a front panel, a top plate and a cover plate, a first cavity is arranged on the front panel, a first suction port is arranged in the first cavity, the top plate and the cover plate are provided with a mounting cavity, the top plate is provided with an air curtain air outlet, and the cover plate is provided with an air curtain air inlet; the air curtain assembly is arranged in the mounting cavity, the air inlet of the air curtain assembly is aligned with the air curtain air inlet, the air outlet of the air curtain assembly is aligned with the air curtain air outlet, the air curtain assembly sucks air through the air curtain air inlet and discharges air through the air curtain air outlet.
[0005] According to an embodiment of the utility model, the range hood further comprises a lighting assembly, and the lighting assembly is installed on the top plate.
[0006] According to an embodiment of the utility model, the range hood further comprises a lighting assembly, and the lighting assembly is installed in the mounting cavity between the top plate and the cover plate, the top plate is provided with a lighting window corresponding to the lighting assembly, and the light-emitting side of the lighting assembly faces the lighting window.
[0007] According to an embodiment of the utility model, two air curtain assemblies are symmetrically arranged in the mounting cavity, the number of air curtain air outlets on the top plate and the number of air curtain air inlets on the cover plate are matched with the air curtain assemblies, and the lighting window is arranged between the two air curtain air outlets.
[0008] According to an embodiment of the utility model, the two sides of top plate are equipped with top suction air inlets, the distance between the left side edge of the top suction air inlet on the left side and the right side edge of the top suction air inlet on the right side is greater than the width of the first suction air inlet, and the distance between the right side edge of the top suction air inlet on the left side and the left side edge of the top suction air inlet on the right side is not greater than the width of the first suction air inlet.
[0009] According to an embodiment of the utility model, the top suction air inlet comprises a second suction air inlet and a third suction air inlet, the second suction air inlet is located at the back side of the third suction air inlet, and the length of the second suction air inlet is less than the length of the third suction air inlet.
[0010] According to an embodiment of the utility model, the top suction air inlet comprises a plurality of second suction air inlets, the second suction air inlets in the top suction air inlet on the same side are arranged into a plurality of rows along the front-back direction of the top plate, and the top suction air inlets on the two sides are symmetrically arranged.
[0011] According to an embodiment of the utility model, a second cavity is arranged on the top plate, and the top suction air inlet is arranged in the second cavity.
[0012] According to an embodiment of the utility model, the smoke machine body is further provided with side baffles, and the side baffles are arranged on the left and right sides of the smoke machine body.
[0013] According to an embodiment of the utility model, the air curtain assembly comprises a fan, an air duct and an air outlet seat, the fan and the air duct are arranged on the top plate, the air inlet side of the fan faces the air curtain air inlet, the air outlet side of the fan faces the air inlet of the air duct, the air outlet of the air duct is connected with the air outlet seat, the air outlet seat is arranged on the top plate, the air outlet seat is aligned with the air curtain air outlet, and a plurality of uniform air holes are uniformly arranged on the air outlet seat.
[0014] Compared with the prior art, the smoke machine has the following advantages:
[0015] The two side walls of the first cavity can form a smoke gathering structure, when the smoke machine works, negative pressure adsorption of oil fume is generated at the first suction air inlet, when the generation speed of oil fume is relatively fast, the oil fume that is not sucked by the first suction air inlet in time is gathered by the smoke gathering structure, thereby preventing the oil fume from easily escaping to the two sides, prolonging the stay time of the oil fume near the front panel, and enabling the oil fume to be more fully sucked into the smoke collecting cavity by the first suction air inlet; in addition, the air curtain assembly can form an air curtain in front of the front panel, and block the oil fume from diffusing and escaping to the front side of the front panel. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a structural schematic view of the smoke machine of the utility model.
[0017] Figure 2 Figure 3 is a structural schematic view of the range hood in another direction of the utility model;
[0018] Figure 3 Figure 4 is a structural schematic view of the range hood in yet another direction of the utility model;
[0019] Figure 4 Figure 5 is a structural schematic view of another embodiment of the range hood of the utility model;
[0020] Figure 5 Figure 6 is a structural schematic view of yet another embodiment of the range hood of the utility model.
[0021] In the figure: 1, range hood main body; 11, front panel; 12, top plate; 13, cover plate; 111, first cavity; 112, first air suction port; 121, air curtain air outlet; 131, air curtain air inlet; 2, air curtain assembly; 3, lighting assembly; 122, second air suction port; 123, third air suction port; 124, second cavity; 14, side baffle; 21, fan; 22, air duct; 23, air outlet seat.
[0022] The function realization and advantages of the utility model will be further explained in combination with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0023] In the following, multiple embodiments of the utility model will be disclosed with reference to the drawings. For clear illustration, 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 the utility model. That is, in some embodiments of the utility model, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be drawn in a simple schematic manner in the drawings.
[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.
[0025] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and does not mean to particularly indicate the order or sequence, nor to limit the present application, which is only to distinguish the components or operations described by the same technical terms, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.
[0026] In order to further understand the content, characteristics and effects of the present application, the following examples are given, and the details are described as follows with reference to the drawings:
[0027] Please refer to Figure 1 The utility model discloses a range hood, the utility model discloses a range hood includes range hood main body 1 and air curtain subassembly 2, range hood main body 1 has front panel 11, top plate 12 and cover plate 13, be equipped with first type cavity 111 on front panel 11, be equipped with first air inlet 112 in first type cavity 111, top plate 12 and cover plate 13 between have installation cavity, be equipped with air curtain air outlet 121 on top plate 12, be equipped with air curtain air inlet 131 on cover plate 13, air curtain subassembly 2 is located in installation cavity, the air inlet of air curtain subassembly 2 is in alignment with air curtain air inlet 131, the air outlet of air curtain subassembly 2 is in alignment with air curtain air outlet 121, air curtain subassembly 2 passes through air curtain air inlet 131 and inhales, and passes through air curtain air outlet 121 and exhausts.
[0028] In the embodiment, range hood main body 1 is equipped with the smoke collecting cavity, and the smoke collecting cavity is communicated with the first air inlet 112. The smoke exhaust fan 21 is installed in the smoke collecting cavity. When the smoke exhaust fan 21 operates, the negative pressure can be generated in the first air inlet 112. The oil fume generated during cooking can be sucked into the smoke collecting cavity through the first air inlet 112 and finally be exhausted by the smoke exhaust fan 21. When the oil fume is sucked by the first air inlet 112, the oil fume is first flowed to the first type cavity 111. The side wall of the first type cavity 111 can form a smoke gathering structure. Therefore, even if the amount of oil fume is too large, the oil fume that cannot be sucked into the smoke collecting cavity by the first air inlet 112 can also be gathered in the first type cavity 111, so as to prevent the oil fume from easily diffusing and escaping in the direction away from the range hood main body 1. The air curtain air outlet 121 is close to the front edge of the top plate 12. When the air curtain subassembly 2 works, the airflow above the cover plate 13 can be sucked into the air curtain air inlet 131 and then be blown to the lower side of the top plate 12 through the air curtain air outlet 121. In this way, the air curtain can be formed in front of the front panel 11. The air curtain can prevent the oil fume from escaping to the front side of the front panel 11, so as to further improve the suction effect of the oil fume.
[0029] The smoke machine of the utility model, the two side wall surfaces of the first cavity 111 can form a smoke gathering structure, when the smoke machine is working, negative pressure adsorption oil fume will be generated at the first air inlet 112, when the generation speed of the oil fume is relatively fast, the oil fume that is not sucked by the first air inlet 112 in time will be gathered by the smoke gathering structure, thereby preventing the oil fume from escaping to the two sides easily, prolonging the stay time of the oil fume near the front panel 11, and enabling the oil fume to be sucked into the smoke collecting cavity by the first air inlet 112 more fully, in addition, the air curtain assembly 2 can form an air curtain in front of the front panel 11, and the air curtain assembly 2 can block the oil fume from diffusing and escaping to the front side of the front panel 11.
[0030] The smoke machine of the utility model, as shown in the drawings, Figure 4 The smoke machine further comprises an illumination assembly 3, and the illumination assembly 3 is installed on the top plate 12. The light emitted by the illumination assembly 3 can irradiate downwards towards the bottom of the top plate 12, thereby illuminating the area below the top plate 12, that is, illuminating the cooking area where the user is located, so as to play an auxiliary lighting role on the cooking process of the user, thereby improving the use effect of the smoke machine.
[0031] In another embodiment, as shown in the drawings, Figure 1 、 Figure 3 and Figure 5 The smoke machine further comprises an illumination assembly 3, and the illumination assembly 3 is installed in the mounting cavity between the top plate 12 and the cover plate 13. The top plate 12 is provided with an illumination window corresponding to the illumination assembly 3, and the light-emitting side of the illumination assembly 3 faces the illumination window. The illumination window is arranged downwards, the light emitted by the illumination assembly 3 can irradiate downwards through the illumination window, thereby illuminating the area below the top plate 12, that is, illuminating the cooking area where the user is located, so as to play an auxiliary lighting role on the cooking process of the user, thereby improving the use effect of the smoke machine.
[0032] In the embodiments shown in the drawings, Figure 1 、 Figure 3 and Figure 5 Two air curtain assemblies 2 are symmetrically arranged in the mounting cavity. The number of air curtain outlets 121 on the top plate 12 and the number of air curtain inlets 131 on the cover plate 13 are matched with the air curtain assemblies 2, and the illumination window is arranged between the two air curtain outlets 121. In the corresponding embodiment, each air curtain assembly 2 corresponds to a burner of a cooking appliance, the air curtain formed by the air curtain assembly 2 can avoid oil fume escaping, and the illumination assembly 3 is installed between the two air curtain assemblies 2, which can not only improve the utilization rate of the space, but also avoid the oil fume polluting the illumination assembly 3 when the air curtain assembly 2 blocks the oil fume from escaping outward.
[0033] The smoke machine of the utility model, as shown in the drawings, Figure 1As shown, the two sides of the top plate 12 are provided with top air suction ports, the distance between the left side edge of the top air suction port on the left side and the right side edge of the top air suction port on the right side is greater than the width of the first air suction port 112, and the distance between the right side edge of the top air suction port on the left side and the left side edge of the top air suction port on the right side is not greater than the width of the first air suction port 112. The width direction air suction range formed by the top air suction port and the first air suction port 112 is greater than the width of the first air suction port 112, and the part of the top air suction port on the left side exceeding the first air suction port 112 and the part of the top air suction port on the right side exceeding the first air suction port 112 are used to capture the oil fume escaping from the two sides of the first air suction port 112, thereby improving the suction effect of the range hood on the oil fume.
[0034] The top air suction port also communicates with the smoke collecting cavity, and negative pressure can be generated at the top air suction port when the exhaust fan 21 is running. The first air suction port 112 is closer to the cooking appliance than the top air suction port. When the generation speed of the oil fume is relatively fast, a large amount of oil fume flows to the first air suction port 112, and part of the oil fume is sucked into the smoke collecting cavity of the range hood by the first air suction port 112. The oil fume that cannot be sucked by the first air suction port 112 in time will flow upward along the front panel 11. When the amount of oil fume is too large to be completely gathered in the first cavity 111, part of the oil fume flowing out of the first cavity 111 will flow forward under the blocking effect of the top plate 12. The oil fume flowing forward will be sucked into the smoke collecting cavity by the top air suction port, thereby reducing the escape of oil fume and improving the suction effect of the range hood on the oil fume.
[0035] The number of top air suction ports is two and arranged along the left-right direction of the top plate 12. The two top air suction ports can be defined as a first top air suction port on the left side and a second top air suction port on the right side. The distance between the left end of the first top air suction port and the right end of the second top air suction port is greater than the width of the first air suction port 112. In this way, the oil fume flowing upward after passing through the two sides of the first air suction port 112 can be sucked into the smoke collecting cavity by the two top air suction ports. The distance between the right end of the first top air suction port and the left end of the second top air suction port is less than or equal to the width of the first air suction port 112. In this way, it can be ensured that the two top air suction ports and the first air suction port 112 have overlapping parts in the flow path of the oil fume, so that the oil fume that cannot be sucked into the smoke collecting cavity by the first air suction port 112 can be sucked by the two top air suction ports after flowing to the top plate 12, thereby further reducing the escape of oil fume and improving the suction effect of the range hood on the oil fume.
[0036] In another embodiment, as shown in Figure 1 The top air suction port includes a second air suction port 122 and a third air suction port 123. The second air suction port 122 is located at the rear side of the third air suction port 123, and the length of the second air suction port 122 is less than the length of the third air suction port 123. The left side edge of the second air suction port 122 of the top air suction port on the left side is aligned with the left side edge of the third air suction port 123, and the right side edge of the second air suction port 122 of the top air suction port on the right side is aligned with the right side edge of the third air suction port 123.
[0037] The number of the second air inlets 122 and the third air inlets 123 is two, the two second air inlets 122 are close to the left end and the right end of the top plate 12 respectively, the two third air inlets 123 are close to the left end and the right end of the top plate 12 respectively, and the second air inlets 122 are closer to the top plate 12 than the third air inlets 123. When the oil fume is generated at a relatively high speed, the oil fume that is not timely sucked by the first air inlet 112 flows upwards along the front plate 11, and after flowing to the top plate 12, part of the oil fume flows to the left and right sides under the flow blocking effect of the top plate 12, and part of the oil fume flows forward. The oil fume flowing to the left and right sides is sucked into the smoke collecting cavity by the second air inlets close to the left end and the right end of the front plate 11, and the oil fume flowing forward is sucked into the smoke collecting cavity by the third air inlets 123. In this way, the oil fume flowing through the top plate 12 can be fully sucked into the smoke collecting cavity, the escape of the oil fume is reduced, the suction effect of the range hood on the oil fume is improved, and the user experience is improved. The left end of one of the second air inlets 122 is flush with the left end of one of the third air inlets 123, and the right end of the other second air inlet 122 is flush with the right end of the other third air inlet 123. Since the length of the second air inlet 122 is less than the length of the third air inlet 123, the ends of the two third air inlets 123 close to each other can be close to the middle of the top plate 12. In this way, the appearance integrity of the top plate 12 can be improved, and the distribution positions of the second air inlets 122 and the third air inlets 123 can be reasonably arranged to ensure that the oil fume flowing to the top plate 12 is fully sucked into the smoke collecting cavity.
[0038] In another embodiment, as shown in Figure 5 The top air inlets include a plurality of second air inlets 122, the second air inlets 122 on the same side of the top air inlets are arranged into a plurality of rows in the front-rear direction of the top plate 12, and the top air inlets on the two sides are symmetrically arranged. The number of the second air inlets 122 can be six, and the six second air inlets 122 are distributed in two columns and three rows. During the process of the oil fume flowing forward, if part of the oil fume is not timely sucked into the rear second air inlets 122, the oil fume can be sucked into the front second air inlets 122 after continuing to flow forward. In this way, the appearance integrity of the top plate 12 can be improved, and the distribution positions of the second air inlets 122 can be reasonably arranged to ensure that the oil fume flowing to the top plate 12 is fully sucked into the smoke collecting cavity.
[0039] In the range hood of the utility model, as shown in Figure 1 The top plate 12 is provided with a second cavity 124, and the top air inlets are arranged in the second cavity 124. The second cavity 124 can play a gathering role on the oil fume flowing to the top plate 12, so as to increase the difficulty of the oil fume escaping from the top plate 12, prolong the flowing time of the oil fume along the top plate 12, and thus provide sufficient time for the top air inlets to fully suck the oil fume into the smoke collecting cavity.
[0040] In the range hood of the utility model, as shown in Figure 1 and Figure 2As shown, the smoke machine body 1 is also provided with side baffles 14 arranged on the left and right sides of the smoke machine body 1. The number of side baffles 14 is two, and the two side baffles 14 are arranged on the left and right sides of the smoke machine body 1, wherein the top side of the side baffle 14 is connected with the top plate 12, the rear side of the side baffle 14 is connected with the front panel 11, and the connection between the top side and the rear side of the side baffle 14 is connected with the connection between the front panel 11 and the top plate 12. The oil fume part that cannot be sucked into the first air inlet 112 will be shunted to the left and right sides of the front panel 11, and the oil fume flowing to the left and right sides will be blocked by the side baffle 14, avoiding the oil fume from easily spreading away from the smoke machine body 1, so as to prolong the residence time of the oil fume near the front panel 11 and the top plate 12, so that the oil fume can be more fully sucked into the smoke collecting cavity by the first air inlet 112. In this way, the oil fume escape can be reduced, so as to improve the suction effect of the smoke machine on the oil fume and improve the user experience.
[0041] In the smoke machine of the utility model, Figure 3 As shown, the air curtain assembly 2 comprises a fan 21, an air duct 22 and an air outlet seat 23, the fan 21 and the air duct 22 are arranged on the top plate 12, the air inlet side of the fan 21 faces the air curtain air inlet 131, the air outlet side of the fan 21 faces the air inlet of the air duct 22, the air outlet of the air duct 22 is connected with the air outlet seat 23, the air outlet seat 23 is arranged on the top plate 12, the air outlet seat 23 is aligned with the air curtain air outlet 121, and a plurality of uniform air holes are uniformly distributed on the air outlet seat 23.
[0042] When the air curtain assembly 2 works, the fan 21 is started, air flows into the air duct 22 from the air curtain air inlet 131, and then flows to the air outlet seat 23 from the air duct 22, and then flows out from the air curtain air outlet 121 after being shunted through the uniform air holes on the air outlet seat 23 to form an air curtain. The air duct 22 can fully guide the air flow flowing into the air curtain air inlet 131 to the air outlet seat 23, the uniform air holes on the air outlet seat 23 can shunt the air flow flowing to the air curtain air outlet 121, so that the air flow flowing out of the air curtain air outlet 121 is more uniform and stable, thereby improving the effect of the formed air curtain.
[0043] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement or improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A range hood, characterized in that: include: A range hood body (1), the range hood body (1) comprising a front panel (11), a top panel (12) and a cover panel (13); a first cavity (111) being provided on the front panel (11); a first air inlet (112) being provided in the first cavity (111); a mounting cavity being provided between the top panel (12) and the cover panel (13); an air curtain air outlet (121) being provided on the top panel (12); and an air curtain air inlet (131) being provided on the cover panel (13); An air curtain assembly (2) is arranged in the installation cavity, the air inlet of the air curtain assembly (2) is aligned with the air curtain air inlet (131), the air outlet of the air curtain assembly (2) is aligned with the air curtain air outlet (121), and the air curtain assembly (2) draws air through the air curtain air inlet (131) and exhausts air through the air curtain air outlet (121).
2. The range hood according to claim 1, characterized in that: It also includes a lighting assembly (3), which is installed on the top plate (12).
3. The range hood according to claim 1, characterized in that: The invention also includes a lighting assembly (3), wherein the lighting assembly (3) is installed in the installation cavity between the top plate (12) and the cover plate (13), and a lighting window corresponding to the lighting assembly (3) is provided on the top plate (12), and the light-emitting side of the lighting assembly (3) faces the lighting window.
4. The range hood according to claim 3, characterized in that: Two air curtain assemblies (2) are symmetrically arranged in the installation cavity, the number of air curtain air outlets (121) on the top plate (12) and the number of air curtain air inlets (131) on the cover plate (13) are adapted to the air curtain assemblies (2), and the lighting window is arranged between the two air curtain air outlets (121).
5. The range hood according to claim 1, characterized in that: Top air suction ports are provided on both sides of the top plate (12), the distance between the left edge of the top air suction port on the left and the right edge of the top air suction port on the right is greater than the width of the first air suction port (112), and the distance between the right edge of the top air suction port on the left and the left edge of the top air suction port on the right is not greater than the width of the first air suction port (112).
6. The range hood according to claim 5, characterized in that: The top suction port comprises a second suction port (122) and a third suction port (123), wherein the second suction port (122) is located at the rear side of the third suction port (123), and the length of the second suction port (122) is less than the length of the third suction port (123); the left side edge of the second suction port (122) of the top suction port on the left side is aligned with the left side edge of the third suction port (123), and the right side edge of the second suction port (122) of the top suction port on the right side is aligned with the right side edge of the third suction port (123).
7. The range hood according to claim 5, characterized in that: The top suction port includes a plurality of second suction ports (122), and the second suction ports (122) in the top suction ports on the same side are arranged in a plurality of rows along the front-to-back direction of the top plate (12), and the top suction ports on both sides are symmetrically arranged.
8. The range hood according to claim 5, characterized in that: A second cavity (124) is provided on the top plate (12), and the top suction port is provided in the second cavity (124).
9. The range hood according to claim 1, characterized in that: The range hood body (1) is further provided with side baffles (14), and the side baffles (14) are provided on the left and right sides of the range hood body (1).
10. The range hood according to claim 1, characterized in that: The wind curtain assembly (2) comprises a fan (21), an air duct (22) and an air outlet seat (23); the fan (21) and the air duct (22) are arranged on the top plate (12); the air inlet side of the fan (21) faces the air inlet (131) of the wind curtain; the air outlet side of the fan (21) faces the air inlet of the air duct (22); the air outlet of the air duct (22) is connected to the air outlet seat (23); the air outlet seat (23) is arranged on the top plate (12); the air outlet seat (23) is aligned with the air curtain outlet (121); and a plurality of air uniformity holes are evenly distributed on the air outlet seat (23).