Air curtain device and extractor hood

Abstract

The utility model belongs to electric appliance technical field, specifically discloses a kind of air curtain device and range hood.Wind curtain device includes air outlet pedestal and air curtain fan.Air outlet pedestal has two first air outlet sections, each first air outlet section is provided with first air outlet passage, and the air outlet port of first air outlet passage is set back and is inclined to air outlet middle longitudinal surface, to make the air outlet of the first air outlet passage of two first air outlet sections converge in air outlet pedestal rear side to form protection area;Air curtain fan is installed on the upside of air outlet pedestal, and the air inlet port of all first air outlet passage is communicated with the fan air outlet of air curtain fan.Range hood includes smoke collecting hood, temperature sensing component and air curtain device.Temperature sensing module and air curtain device are installed in the smoke gathering top of smoke collecting hood, and in left-right direction, temperature sensing module is located between two first air outlet sections.The utility model can form airflow protection to temperature sensing module by air curtain device, improve the detection reliability and detection accuracy of temperature sensing module.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to an air curtain device and a range hood. Background Technology

[0002] Range hoods are common kitchen appliances in modern homes. They use internal fans to extract kitchen fumes, purify the kitchen environment, and enhance the cooking experience.

[0003] Existing technology provides a range hood, which includes a smoke collection hood, a fan module mounted on top of the smoke collection hood, and a temperature sensing module mounted on the smoke collection hood. The temperature sensing module is mounted on the top of the smoke collection hood and located in the middle of the hood along the left-right direction. When the range hood is running, the temperature sensing module detects the temperature of the cooktop downwards and transmits the detection result to the range hood's controller. The controller controls the operation of the fan based on the temperature detected by the temperature sensing module, thereby matching the amount of smoke with the airflow.

[0004] Existing technology for range hoods often fails to completely remove cooking fumes, especially for those with smoke inlets at the top of the hood. As the fumes rise, they flow towards the temperature sensing module, causing grease to adhere to it. This affects the sensitivity and accuracy of the temperature sensor, ultimately reducing the range hood's fume extraction performance and impacting the long-term user experience. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide an air curtain device that can effectively solve the problem of oil fumes adhering to the temperature sensing module in existing range hoods, causing a decrease in the detection sensitivity and accuracy of the temperature sensing module.

[0006] The second technical problem solved by this utility model is to provide a range hood that can effectively solve the problem of oil fumes adhering to the temperature sensing module, causing a decrease in the detection sensitivity and accuracy of the temperature sensing module.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] An air curtain device, comprising:

[0009] An air outlet base has two first air outlet sections arranged side by side in the left-right direction. Each first air outlet section is provided with a first air outlet channel. The air outlet port of the first air outlet channel is arranged rearward and inclined towards the air outlet longitudinal surface, so that the air outlets of the first air outlet channels of the two first air outlet sections converge at the rear side of the air outlet base to form a protective area. The air outlet longitudinal surface is located between the two first air outlet sections and is perpendicular to the left-right direction.

[0010] An air curtain fan is installed on the upper side of the air outlet base, and the air inlet ports of all the first air outlet channels are connected to the air outlet of the air curtain fan.

[0011] Compared with the prior art, the air curtain device of this utility model has the following advantages: by setting two first air outlet sections with a first air outlet channel, and the airflow from the two first air outlet sections can converge at the rear side of the air outlet base to form a protective area, the airflow from the two first air outlet sections impacts each other when the air curtain device is running, which can better disperse the oil fumes near the protective area and prevent the fumes from flowing into the protective area, thereby providing better oil fume protection for the structure installed in the protective area.

[0012] In one embodiment, each first air outlet section includes a plurality of first air outlet channels arranged separately along the left-right direction, and the first air outlet channels of the two first air outlet sections are arranged in a one-to-one correspondence.

[0013] In one first air outlet section, the air outlets of multiple first air outlet channels arranged sequentially along the direction away from the longitudinal surface of the air outlet are arranged from front to back at the intersection points of the air outlets of the corresponding first air outlet channels of another first air outlet section.

[0014] In one embodiment, the two first air outlet sections are symmetrically arranged relative to the longitudinal direction of the air outlet;

[0015] And / or, the length of the air outlet port of the first air outlet channel in the left-right direction is W, 10mm≤W≤15mm.

[0016] In one embodiment, each first air outlet section includes at least two rows of first channel groups, and each row of first channel groups includes multiple first air outlet channels arranged in the left-right direction. In the same first air outlet section, the air outlet ports of multiple rows of first channel groups are arranged separately from top to bottom.

[0017] In one embodiment, in two adjacent first channel groups of the same first air outlet section, the air outlet port of the first air outlet channel of the lower first channel group is located in front of the air inlet port of the first air outlet channel of the other first channel group.

[0018] And / or, in the same first air outlet section, the vertical distance between the air outlet ports of two adjacent first air outlet channels of two adjacent channel groups is d1, 0.5mm≤d1≤2mm;

[0019] And / or, the first air outlet channel is an arc-shaped channel, and the opening of the arc-shaped channel is arranged facing backward and upward.

[0020] In one embodiment, the angle between the air outlet direction corresponding to the first air outlet channel and the longitudinal plane of the air outlet is the air outlet tilt angle. The air outlet tilt angles of all the first air outlet channels located in the same first air outlet segment are the same, or, in the same first air outlet segment, the air outlet tilt angles of multiple first air outlet channels arranged sequentially away from the longitudinal plane of the air outlet gradually increase.

[0021] In one embodiment, the width of the first air outlet channel in the left-right direction gradually decreases from the air inlet port to the air outlet port;

[0022] And / or, for multiple first air outlet channels located in the same first air outlet section, the width of the air outlet port of the first air outlet channel in the left-right direction gradually decreases in the direction away from the longitudinal surface of the air outlet.

[0023] In one embodiment, the air outlet base is provided with two second air outlet sections spaced apart in the left-right direction, and the two first air outlet sections are located between the two second air outlet sections. Each second air outlet section has a plurality of second air outlet channels spaced apart in the left-right direction. The air outlet of the second air outlet channel is arranged facing backward or downward, and the air inlet of the second air outlet channel is connected to the air outlet of the fan.

[0024] In one embodiment, two air curtain fans are arranged at intervals along the left and right direction, and the air outlet of each air curtain fan is connected to the air inlet of the first air outlet channel and the second air outlet channel located on the same side of the longitudinal plane of the air outlet.

[0025] In one embodiment, the air curtain fan is a long strip structure extending along the left-right direction, and the fan outlet covers the upper ends of the first air outlet section and the second air outlet section on the corresponding side.

[0026] In one embodiment, each second air outlet section is provided with at least two rows of second channel groups, and each row of second channel groups includes multiple second air outlet channels spaced apart in the left-right direction. In the same second air outlet section, the air outlet ports of multiple rows of second channel groups are separated in the vertical direction.

[0027] The second technical problem mentioned above is solved by the following technical solution:

[0028] A range hood includes a smoke collection hood with a downward-facing smoke-gathering top. The range hood also includes a temperature-sensing module and an air curtain device as described above. Both the temperature-sensing module and the air curtain device are mounted on the smoke-gathering top, and the air outlet base is located in front of the temperature-sensing module. In the left-right direction, the temperature-sensing module is located between two first air outlet sections and is located within the protected area.

[0029] Compared with the prior art, the range hood of this utility model has the following advantages: by adopting the above-mentioned air curtain device, the airflow flowing out of the first air outlet channel can form a fume protection at the temperature sensing module, reducing the probability of fume adhering to the temperature sensing module and improving the detection sensitivity and accuracy of the temperature sensing module; at the same time, this setting can also stop the fume from escaping forward through the airflow of the first air outlet channel, reducing the probability of fume escaping forward and improving the fume extraction performance of the range hood.

[0030] In one embodiment, a mounting base is connected to the rear side of the air outlet base, and the temperature sensing module is detachably mounted on the mounting base;

[0031] And / or, the top of the smoke collector has a temperature sensor mounting hole and an air curtain mounting hole, the air outlet base is installed in the air curtain mounting hole and the air curtain fan is located inside the smoke hood, the smoke hood has an air inlet, the temperature sensor module is installed in the temperature sensor mounting hole, the upper end of the temperature sensor module is located inside the smoke hood and the detection end is exposed through the temperature sensor mounting hole.

[0032] In one embodiment, the smoke hood is provided with an oil-separating cavity above the top of the smoke collection hood. The oil-separating cavity is separated from the smoke collection cavity of the smoke hood by an oil-separating plate inside the smoke hood. The upper end of the temperature sensing module and the air curtain fan are both located in the oil-separating cavity. An air inlet is provided on the upper side or left and right side walls of the oil-separating cavity. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of a range hood provided in an embodiment of the present invention from one perspective;

[0034] Figure 2 A schematic diagram of the structure of the range hood provided in this embodiment of the present invention from another perspective;

[0035] Figure 3 A schematic diagram showing the disassembled structure of a range hood provided in an embodiment of this utility model;

[0036] Figure 4 This is a partial structural cross-sectional view of a range hood provided in an embodiment of the present utility model;

[0037] Figure 5 for Figure 4 A magnified view of a section at point I;

[0038] Figure 6 A schematic diagram of the partial flow of air curtain airflow and smoke airflow in a range hood provided in an embodiment of this utility model;

[0039] Figure 7A schematic diagram of the structure of the air curtain device and temperature sensing module provided in the embodiments of this utility model;

[0040] Figure 8 for Figure 7 A magnified view of a section at point J;

[0041] Figure 9 A top view of the air outlet base provided in an embodiment of this utility model;

[0042] Figure 10 A partial structural diagram and an airflow direction diagram of the air outlet base provided in this embodiment of the utility model;

[0043] Figure 11 A partial structural schematic diagram of the air outlet base provided in this embodiment of the utility model;

[0044] Figure 12 A cross-sectional view of the air outlet base provided in an embodiment of this utility model;

[0045] Figure 13 A schematic diagram of the disassembled structure of the air curtain device provided in this embodiment of the utility model;

[0046] Figure 14 A cross-sectional view of the air curtain fan provided in an embodiment of this utility model.

[0047] Label Explanation:

[0048] 100. Air curtain device; 200. Temperature sensing module; 201. Main housing; 2011. Main cylinder section; 2012. Flange section; 202. End cap; 203. Temperature sensing component; 204. Locking ring; 205. Locking gasket; 300. Smoke hood; 301. Smoke collection top; 3011. Temperature sensing mounting hole; 3012. Air curtain mounting hole; 302. Top smoke inlet; 303. Side smoke inlet; 304. Smoke collection chamber; 305. Oil separator plate; 306. Oil separator chamber; 307. Air inlet; 400. Lighting module; 500. Exhaust module;

[0049] 1. Air outlet base; 1a. First air outlet section; 1b. Second air outlet section; 11. Seat plate; 12. Air guide plate; 13. Divider plate; 13a. First divider plate; 13b. Second divider plate; 13c. Section divider plate; 14. Air outlet duct; 14a. First air outlet duct; 14b. Second air outlet duct;

[0050] 2. Air curtain fan; 21. Fan cover; 211. Side wall; 212. End plate; 213. Fixed side plate; 214. Air cavity; 215. Fan inlet; 216. Fan outlet; 22. Impeller; 23. Drive motor; 3. Mounting base; 31. Mounting through hole. Detailed Implementation

[0051] 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 skilled in the art without creative effort are within the scope of protection of this application.

[0052] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0053] The terms "first" and "second" 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 one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] like Figures 1 to 6 , Figure 9 and Figure 10 As shown, this embodiment provides a range hood that can reduce the damage of oil fumes to the temperature sensing module 200, better ensure the detection sensitivity and accuracy of the temperature sensing module 200, and improve the user experience of the range hood.

[0056] The range hood includes a smoke collection hood 300, an exhaust module 500, a temperature sensing module 200, and a controller. The smoke collection hood 300 has a smoke collection chamber 304 and a smoke inlet. The exhaust module 500 is installed on the smoke collection hood 300 and includes an exhaust fan. The exhaust fan operates at the smoke inlet to create negative pressure, allowing external fumes to enter the smoke collection chamber 304 through the smoke inlet. The smoke collection hood 300 has a downward-facing smoke-gathering top 301. The temperature sensing module 200 is installed on the smoke-gathering top 301 and is used to detect the temperature of the cooktop. The controller is communicatively connected to both the temperature sensing module 200 and the exhaust fan, allowing the controller to control the operation of the exhaust fan based on the detection results from the temperature sensing module 200.

[0057] In this embodiment, the range hood also includes an air curtain device 100, which includes an air outlet base 1 and an air curtain fan 2. The air outlet base 1 has two first air outlet sections 1a arranged side by side in the left-right direction. Each first air outlet section 1a is provided with a first air outlet channel 14a. The air outlet port of the first air outlet channel 14a is arranged rearward and inclined towards the longitudinal surface of the air outlet, so that the air outlets of the first air outlet channels 14a of the two first air outlet sections 1a converge at the rear side of the air outlet base 1 to form a protective area. The longitudinal surface of the air outlet is located between the two first air outlet sections 1a and is perpendicular to the left-right direction. The air curtain fan 2 is installed on the upper side of the air outlet base 1, and the air inlet ports of all the first air outlet channels 14a are connected to the fan outlet 216 of the air curtain fan 2.

[0058] The air curtain device 100 is installed on the top of the smoke collection 301, and the air outlet base 1 is located in front of the temperature sensing module 200. In the left and right direction, the temperature sensing module 200 is located between the two first air outlet sections 1a, and the temperature sensing module 200 is located within the protected area.

[0059] The air curtain device 100 and range hood provided in this embodiment, by setting two first air outlet sections 1a with a first air outlet channel 14a, and the airflow from the two first air outlet sections 1a can converge at the rear side of the air outlet base 1 to form a protective area, so that when the air curtain device 100 is running, the airflow from the two first air outlet sections 1a impacts each other, which can effectively disperse the oil fumes near the protective area and prevent the fumes from flowing into the protective area. This provides better oil fume protection for the temperature sensing module 200 installed in the protective area, reduces the probability of oil fumes adhering to the temperature sensing module 200, and improves the detection sensitivity and detection accuracy of the temperature sensing module 200. At the same time, this setting can also prevent the oil fumes from escaping forward through the airflow from the first air outlet channel 14a, reduce the probability of oil fumes escaping forward, and improve the oil fume extraction performance of the range hood.

[0060] like Figures 1 to 3As shown, in one embodiment, the smoke collection hood 300 is arranged in a "7" shape, that is, it includes a smoke collection side section and a smoke collection horizontal section. The upper end of the smoke collection side section is connected to the rear end of the smoke collection horizontal section, and the extraction module 500 is installed on the top of the smoke collection hood 300. Both the smoke collection side section and the smoke collection horizontal section have smoke inlets to improve the smoke collection effect, thereby improving the smoke extraction effect. The smoke inlet located in the smoke collection horizontal section is a top smoke inlet 302, and the smoke inlet located in the side section is a side smoke inlet 303. The lower side of the smoke collection horizontal section forms a smoke collection top 301, and the top smoke inlet 302 is located behind the temperature sensing module 200.

[0061] In other embodiments, the range hood may also be a top-mounted range hood, i.e., the smoke collection hood 300 is provided with a smoke inlet only at the top, and the smoke inlet is located behind the temperature sensing module 200.

[0062] In one embodiment, the temperature sensing module 200 is installed in the middle of the fume hood 300 along the left-right direction, and the temperature sensing module 200 can detect the temperature of both the left and right burners of the stove. Specifically, the temperature sensing module 200 is fixedly installed in the fume hood 300, and the detection area formed by the temperature sensing module 200 on the stove covers both burners; or, the temperature sensing module 200 can be rotated and installed in the fume hood 300 to sway left and right, so that the detection area of ​​the temperature sensing module 200 can selectively cover the left burner or the right burner through the left-right sway of the temperature sensing module 200.

[0063] In other embodiments, two temperature sensing modules 200 may be arranged at intervals along the left-right direction, and the two temperature sensing modules 200 respectively detect the temperature of the two burners. An air curtain device 100 may be arranged in a one-to-one correspondence with each temperature sensing module 200, so that the airflow generated by each air curtain device 100 protects the corresponding temperature sensing module 200; only one air curtain device 100 may be provided, and each air curtain device 100 may have two sets of first air outlet sections 1a, with each set of first air outlet sections 1a corresponding to the two temperature sensing modules 200, and each set of first air outlet sections 1a includes two first air outlet sections 1a whose airflow converges.

[0064] To improve the smoke extraction effect of the range hood, it also includes two side baffles located on both sides of the smoke collection hood 300. The two side baffles are positioned opposite each other and protrude forward from the front side of the smoke collection section. The side baffles prevent cooking fumes from escaping to the left and right, thereby improving the smoke extraction effect.

[0065] In one embodiment, the range hood further includes a lighting module 400, which is mounted on the smoke collection top 301 to provide illumination for the user's cooking. The lighting module 400 is mounted behind the temperature sensing module 200 and extends in the left-right direction to increase the lighting area. Positioning the lighting module 400 behind the temperature sensing module 200 ensures that it does not interfere with the air curtain device 100. Simultaneously, the airflow from the air curtain device 100 can disperse the cooking fumes near the lighting module 400, reducing the probability of cooking fumes adhering to the lighting device.

[0066] In other embodiments, the lighting module 400 may also be disposed on the front side of the smoke collection top 301, and two are spaced apart in the left-right direction, with the two lighting modules 400 located on the left and right sides of the air curtain device 100 respectively. In this configuration, the air curtain device 100 is only disposed in the middle area of ​​the smoke collection top 301, providing airflow protection for the temperature sensing module 200.

[0067] It is worth noting that the specific structures of the exhaust module 500, the smoke hood 300, and the lighting device can all be set with reference to the existing technology. This is not the focus of this utility model, and this utility model does not limit or elaborate on it.

[0068] like Figures 1 to 5 As shown, to improve the installation convenience of the air curtain device 100 and the temperature sensing module 200, the smoke collection top 301 has a temperature sensing mounting hole 3011 and an air curtain mounting hole 3012. The air outlet base 1 is installed in the air curtain mounting hole 3012, and the air curtain fan 2 is located inside the smoke collection hood 300. The smoke collection hood 300 has an air inlet 307, which is installed in the temperature sensing mounting hole 3011 along with the temperature sensing module 200. The upper end of the temperature sensing module 200 is located inside the smoke collection hood 300, and the detection end is exposed through the temperature sensing mounting hole 3011. By setting the air curtain mounting hole 3012 and the temperature sensing mounting hole 3011, positioning can be provided for the installation of the temperature sensing module 200 and the air curtain device 100. The air curtain mounting hole 3012 is a long strip-shaped hole structure.

[0069] In one embodiment, the top interior of the smoke hood 300 has an oil-separating chamber 306 separated from the smoke collection chamber 304. The upper end of the temperature sensing module 200 and the air curtain fan 2 are both installed in the oil-separating chamber 306. Air inlets 307 communicating with the oil-separating chamber 306 are provided on the left and right sides or the top of the smoke hood 300. Thus, when the air curtain device 100 is running, air from the sides or top of the smoke hood 300 enters the oil-separating chamber 306 through the air inlets 307 and is sent to the first air outlet channel 14a. The oil-separating chamber 306 prevents oil fumes from entering the oil-separating chamber 306 and causing the airflow flowing out of the first air outlet channel 14a to carry grease, ensuring the cleanliness of the airflow blown by the air curtain device 100. Furthermore, the upper part of the lighting module 400 is located inside the oil-separating chamber 306.

[0070] Air inlets 307 are preferably located at the top of the fume hood 300 to prevent grease from accumulating in the air on both sides of the hood 300 when fumes escape to the sides. Positioning the air inlets 307 at the top of the hood also improves the overall aesthetics of the range hood. Multiple air inlets 307 are preferably provided to ensure sufficient airflow while minimizing the size of each individual inlet, thereby preventing external dust, impurities, or small animals from entering the grease trap 306.

[0071] An oil separator 305 is provided inside the top of the smoke hood 300. The oil separator 305 extends in the left and right direction and its two ends are connected to the inner walls of the left and right sides of the smoke hood 300 respectively. The oil separator 305 divides the upper space of the smoke hood 300 into an oil separator chamber 306 and a part of the smoke collection chamber 304. The top smoke inlet 302 is located on the rear side of the oil separator 305.

[0072] The temperature sensing module 200 includes a mounting housing and a temperature sensing component 203. The mounting housing has a closed mounting cavity, and a light-transmitting hole communicating with the mounting cavity is opened at the first end of the mounting housing. The temperature sensing component 203 is installed inside the mounting housing, and the detection head of the temperature sensing component 203 is inserted into the light-transmitting hole. The mounting housing is detachably installed at the temperature sensing mounting hole 3011. The mounting housing facilitates the overall assembly and disassembly of the temperature sensing module 200 and provides protection for the temperature sensing component 203.

[0073] It is worth noting that the temperature sensing component 203 adopts a non-contact temperature detection principle, such as infrared temperature measurement. The temperature sensing module 200 can, but is not limited to, using existing devices capable of non-contact temperature detection, such as infrared temperature sensors. This embodiment does not limit or elaborate on the specific structure and detection principle of the temperature sensing component 203.

[0074] To facilitate the installation and removal of the temperature sensing component 203, the mounting housing includes a detachably connected main housing 201 and an end cap 202. The main housing 201 has a mounting groove with one open end. The end cap 202 is detachably disposed at the open end of the mounting groove to close it. The main housing 201 and the end cap 202 together form a mounting cavity. A light-transmitting hole is provided at the end of the main housing 201 away from the end cap 202 and is installed in the temperature sensing mounting hole 3011.

[0075] In one embodiment, a mounting base 3 is connected to the rear side of the air outlet base 1, and the temperature sensing module 200 is detachably mounted on the mounting base 3. This arrangement ensures the reliability of the relative position of the temperature sensing module 200 and the air curtain device 100, and allows the temperature sensing module 200 and the air curtain device 100 to be assembled into a modular unit for overall installation and disassembly, simplifying the installation of the temperature sensing module 200 and the air curtain device 100 on the smoke hood 300. It also facilitates the control of the distance between the temperature sensing module 200 and the first air outlet channel 14a, ensuring the protective effect of the airflow from the first air outlet channel 14a on the temperature sensing module 200. In other embodiments, the temperature sensing module 200 and the air curtain device 100 can also be separately arranged and installed on the smoke hood 300 respectively.

[0076] In one embodiment, the mounting shell passes through the mounting base 3 and the temperature sensing mounting hole 3011. The first end of the mounting shell has a flange portion 2012 protruding outward, and the smoke collection top 301 is sandwiched between the flange portion 2012 and the mounting base 3. This arrangement can prevent the temperature sensing module 200 from falling out of the mounting hole, ensuring the stability and reliability of the temperature sensing module 200.

[0077] Specifically, the mounting base 3 has a mounting through hole 31. When assembling the air curtain device 100 and the temperature sensing module 200, the air curtain device 100 is first installed inside the smoke collection hood 300. Then, the mounting shell with the temperature sensing component 203 is passed through the temperature sensing mounting hole 3011 and the mounting through hole 31 from bottom to top until the flange 2012 abuts against the outer surface of the smoke collection top 301. Then, the mounting shell and the mounting base 3 are tightened to fix the temperature sensing module 200. This makes the installation and disassembly of the temperature sensing module 200 more convenient, and there is no need to set other structures on the smoke collection hood 300 for fixing the temperature sensing module 200, reducing the number of parts and reducing the assembly difficulty of the smoke collection hood 300.

[0078] In one embodiment, the main cylinder portion 2011 is provided with external threads, and the temperature sensing module 200 also includes a locking ring 204. The locking ring 204 is screwed onto the main cylinder portion 2011 and presses against the side of the mounting base 3 away from the flange portion 2012. This secures the mounting base 3 and the temperature sensing module 200. The locking ring 204 can be screwed onto the main cylinder portion 2011 to adjust the pressure of the locking ring 204 on the mounting base 3, ensuring installation reliability and effectively improving the assembly stability and reliability of the mounting shell, mounting base 3, and smoke collection top 301. In other embodiments, the mounting shell protrudes outwards with a fixing ear, which is detachably connected to the mounting base 3, similarly enabling the temperature sensing module 200 to be fixed on the mounting base 3.

[0079] In one embodiment, the range hood further includes a locking gasket 205, which is sleeved on the outside of the mounting shell and sandwiched between the mounting base 3 and the locking ring 204. This allows the locking ring 204 to compress the locking gasket 205, thereby pressing the mounting base 3 against the top of the smoke 301, reducing the gap between them, and thus reducing the probability of oil fumes entering the oil separator 306.

[0080] like Figure 2 , Figures 7 to 9 As shown, in one embodiment, the air curtain device 100 further includes two second air outlet sections 1b spaced apart in the left-right direction, with two first air outlet sections 1a located between the two second air outlet sections 1b. In the left-right direction, the two second air outlet sections 1b are respectively arranged corresponding to two top smoke inlets 302, and each second air outlet section 1b has a rearward-facing second air outlet channel 14b. When the fumes rise to the top of the smoke collection 301, some of the fumes may flow forward along the top of the smoke collection 301. By setting the second air outlet channel 14b, the airflow flowing out of the second air outlet channel 14b flows backward, which can cut off the forward-flowing fumes. Thus, the fumes flow to the top smoke inlet 302 under the swirling action of the air curtain airflow and are sucked into the top smoke inlet 302, which can effectively prevent the fumes from escaping.

[0081] In other embodiments, the air curtain device 100 may have two second air outlet sections 1b, each having a second air outlet channel 14b. The air outlets of the second air outlet channels 14b are arranged downwards to form an air curtain in front of the user, preventing the oil fumes from flowing forward to the user, reducing the probability of the oil fumes escaping forward, and reducing the harm of the oil fumes to the user.

[0082] In one embodiment, such as Figure 9 As shown, the sum of the lengths of the two first air outlet sections 1a in the left and right directions is L1, where 60mm≤L1≤250mm. This setting ensures that the airflow from the two first air outlet sections 1a can effectively protect the temperature sensing module 200 while also effectively blocking the flow of oil fumes between the two top smoke inlets 302 and guiding the fumes between the two top smoke inlets 302 to the top smoke inlets 302. At the same time, setting L1 to be less than or equal to 250mm can prevent the length of the first air outlet section 1a from being too large, which would reduce the length of the second air outlet section 1b and weaken the effect of the air curtain device 100 in preventing the lateral escape of oil fumes.

[0083] Furthermore, 80mm≤L1≤120mm is used to increase the length of the two second air outlet sections 1b while ensuring the protection effect of the temperature sensing module 200. L1 can be, but is not limited to, 80mm, 83mm, 85mm, 87mm, 90mm, 93mm, 95mm, 97mm, 100mm, 105mm, 110mm, 115mm or 120mm.

[0084] The total air outlet length L0 of the air curtain device 100 in the left-right direction is 600mm to 750mm, meaning that both ends of the air curtain device 100 extend to the left and right sides of the smoke collection hood 300. In the left-right direction, both top smoke inlets 302 are located between the two ends of the air outlet area of ​​the air curtain device 100, thereby allowing the air outlet area of ​​the air curtain device 100 to cover the two top smoke inlets 302, enabling the air outlet of the air curtain device 100 to effectively prevent the lateral escape of oil fumes. The total air outlet length of the air curtain device 100 can be, but is not limited to, 600mm, 620mm, 640mm, 660mm, 680mm, 700mm, 720mm, 730mm, 740mm, or 750mm.

[0085] The air outlet base 1 has four air outlet sections along its length. Each air outlet section is provided with an air outlet channel 14. The air inlet of the air outlet channel 14 is connected to the air outlet 216 of the air curtain fan 2. The two middle air outlet sections are the first air outlet sections 1a, and their air outlet channels 14 are the first air outlet channels 14a. The two air outlet sections on both sides are the second air outlet sections 1b, and their air outlet channels 14 are the second air outlet channels 14b.

[0086] like Figure 9 and Figure 10 As shown, to improve the uniformity and effectiveness of the airflow from the air curtain device 100, in one embodiment, each air outlet section includes multiple air outlet channels 14 arranged separately in the left-right direction, enhancing the air curtain's effect on blocking oil fumes. The first air outlet channels 14a of the two first air outlet sections 1a are arranged in a one-to-one correspondence; for one first air outlet section 1a, the airflow from multiple first air outlet channels 14a arranged sequentially in the direction away from the longitudinal surface of the airflow intersects with the corresponding first air outlet channel 14a of the other first air outlet section 1a, arranged sequentially from front to back. This arrangement provides multi-layered cross-protection for the temperature sensing module 200, improving the effect of the protective airflow in driving away oil fumes and enhancing the oil fume protection performance of the temperature sensing module 200. In other embodiments, the first air outlet section 1a and / or the second air outlet section 1b may be provided with one air outlet channel 14, the air outlet channel 14 having a certain length in the left-right direction.

[0087] like Figure 7 and Figure 10As shown, two adjacent air outlet channels 14 are separated by partition plates 13. The partition plate 13 located in the first air outlet section 1a is the first partition plate 13a, and the partition plate 13 located in the second air outlet channel 14b is the second partition plate 13b. Each first partition plate 13a in the first air outlet section 1a is inclined from front to back towards the longitudinal direction of the air outlet, so that the first air outlet channel 14a between the two first partition plates 13a is also inclined from front to back towards the longitudinal direction of the air outlet, allowing the first air outlet channels 14a on both sides of the longitudinal direction of the air outlet to intersect. By separating the air outlet channels 14 with partition plates 13, the structure of the air outlet base 1 is simplified, and the inclination angle of the first air outlet channel 14a relative to the longitudinal direction of the air outlet can be controlled by adjusting the inclination angle of the first partition plate 13a relative to the longitudinal direction of the air outlet, thereby controlling the intersection position of the two corresponding first air outlet channels 14a.

[0088] In one embodiment, the second partition plate 13b is perpendicular to the left-right direction, that is, the direction of the second air outlet channel 14b formed by two adjacent second partition plates 13b is parallel to the longitudinal surface of the air outlet, so that the air outlet of the second air outlet channel 14b can blow directly towards the top smoke inlet 302 in the front-back direction, thereby improving the blocking effect on the forward dispersion of oil fumes and improving the oil fume extraction effect.

[0089] The two first air outlet sections 1a are symmetrically arranged relative to each other in the longitudinal direction of the air outlet. That is, the multiple first air outlet channels 14a within the two first air outlet sections 1a are symmetrically arranged relative to each other in the longitudinal direction of the air outlet. This arrangement reduces the processing difficulty of the air outlet base 1 and facilitates better control of the convergence position of the airflow. Furthermore, the two second air outlet sections 1b are symmetrically arranged relative to each other in the longitudinal direction of the air outlet. For example... Figures 10 to 12 As shown, the angle between the air outlet direction of the first air outlet channel 14a and the longitudinal plane of the air outlet is the air outlet tilt angle, which is denoted by A. In one embodiment, 8°≤A≤45°. The larger the air outlet tilt angle, the smaller the distance between the intersection of the two corresponding first air outlet channels 14a and the air outlet base 1. The airflow from the first air outlet channel 14a moves faster in the left-right direction and has less momentum in the front-back direction. Correspondingly, the collision between the two airflows formed by the two first air outlet channels 14a is more obvious, which increases the blocking effect of oil fumes near the temperature sensing module 200, but reduces the effect of guiding and driving oil fumes to the top air inlet. Furthermore, the total airflow protection area formed by the two first air outlet sections 1a has a smaller coverage area in the front-back direction. Therefore, setting the air outlet tilt angle to be greater than or equal to 8° can avoid the problem that the confluence point of the two airflows is too far from the temperature sensing module 200 due to a small air outlet tilt angle, which would result in a low effect on removing oil fumes near the temperature sensing module 200; setting the air outlet tilt angle to be less than or equal to 45° can avoid the problem that the effect of guiding oil fumes to the top air inlet is weak due to an excessively large air outlet tilt angle.

[0090] In one embodiment, the outlet tilt angle is greater than or equal to 10° and less than or equal to 25°. The outlet tilt angle may be, but is not limited to, 10°, 13°, 15°, 17°, 20°, 23°, 25°, etc.

[0091] In one embodiment, the air outlet tilt angle corresponding to each first air outlet channel 14a is the same, that is, the first air outlet channels 14a in the same air outlet section are parallel and spaced apart, so as to reduce the processing difficulty of the air outlet base 1.

[0092] In other embodiments, within the same air outlet section, the air outlet tilt angles corresponding to multiple first air outlet channels 14a gradually increase along the direction away from the longitudinal plane of the air outlet. This arrangement ensures that while the air outlet convergence points of multiple pairs of first air outlet channels 14a are arranged from front to back, the spacing between these convergence points gradually decreases from front to back. This causes the air outlet convergence points of multiple pairs of first air outlet channels 14a to move closer to the temperature sensing module 200, enhancing the airflow from the air curtain device 100's airflow and its ability to block oil fumes at the temperature sensing module 200, thus improving the user experience. In other embodiments, all air outlet tilt angles can be set identically.

[0093] In one embodiment, the length of the first air outlet channel 14a and / or the second air outlet channel 14b in the lateral direction can gradually decrease from the air inlet end to the air outlet end. This accelerates the airflow exiting the air outlet channel 14, increases the airflow momentum of the air outlet channel 14, and thus enhances the obstruction and guidance effect of the air outlet channel 14 on the flue gas. That is, as Figure 12 As shown, the length of the air outlet port of the air outlet channel 14 in the left-right direction is w1, and the length of the air inlet port of the air outlet channel 14 in the left-right direction is w2, where w1 < w2.

[0094] In other embodiments, the width of each air outlet 14 in the left-right direction is approximately the same from the air inlet to the air outlet, so as to reduce the processing difficulty of the air outlet 14 and thus reduce the processing difficulty of the air outlet 14.

[0095] It is worth noting that the length of the two air outlet channels 14 can be controlled by changing the thickness of the partition plate 13.

[0096] In one embodiment, the length of the air outlet port of each air outlet duct 14 is consistent in the left-right direction, thereby enabling the air outlet ducts 14 to discharge air approximately evenly and reducing the difficulty of setting up the air outlet ducts 14. In another embodiment, in the same first air outlet section 1a, the length of the air outlet ports of the multiple first air outlet ducts 14a arranged sequentially away from the longitudinal surface of the air outlet gradually decreases, thereby making the width of the air outlet ducts 14 further away from the longitudinal surface of the air outlet smaller in the same air outlet section 1a, resulting in a greater airflow velocity, which in turn increases the effect of the side airflow on driving away the smoke, and thus improves the oil fume isolation effect of the temperature sensing module 200.

[0097] like Figure 12 As shown, in one embodiment, each air outlet section includes at least two rows of channel groups, and each row of channel groups includes multiple air outlet channels 14 arranged left and right. The air outlet ports of the multiple rows of channel groups are arranged sequentially from top to bottom, and the air inlet of all air outlet channels 14 is connected to the air outlet 216 of the air curtain fan 2. This arrangement allows each air outlet section to form multi-layer air outlets, thereby increasing the coverage of the airflow in the height direction of the air outlet section, improving the blocking and diversion effect of the air outlet section on the flow of flue gas, thereby improving the protection effect of the air outlet of the first air outlet section 1a on the temperature sensing module 200, and improving the effect of the second air outlet section 1b in blocking the oil fumes from escaping forward and to the sides. The multiple air outlet channels 14 of the multiple rows of channel groups are arranged correspondingly to simplify the structure of the air outlet base 1 and reduce the processing difficulty of the air outlet base 1.

[0098] That is, each first air outlet section 1a includes at least two rows of first channel groups, and each row of first channel groups includes multiple first air outlet channels 14a arranged in the left-right direction. The air outlet ports of the multiple rows of first channel groups are arranged separately from top to bottom. Each second air outlet section 1b is provided with at least two rows of second channel groups, and each row of second channel groups includes multiple second air outlet channels 14b arranged at intervals in the left-right direction. The air outlet ports of the multiple rows of second channel groups are arranged separately in the vertical direction. The air outlet channels 14 of all channel groups in the same air outlet section 1a are arranged facing each other in the left-right direction to simplify the structure of the air outlet base 1 and reduce the processing difficulty of the air outlet base 1.

[0099] In other embodiments, only the first air outlet section 1a may be provided with multiple rows of first channel groups, or only the second air outlet section 1b may be provided with multiple rows of second channel groups.

[0100] In each air outlet section, the air inlet ports of multiple channel groups arranged sequentially from top to bottom all pass through the air outlet base 1 and are arranged sequentially from back to front. That is, in the air outlet channels 14 of two adjacent channel groups, the air inlet port of the air outlet channel 14 of the upper channel group is located behind the air inlet port of the air outlet channel 14 of the other channel group. This arrangement makes it easier to process and shape the air outlet base 1, improves the convenience of setting the air outlet channels 14, reduces the probability of mutual interference between the air outlet channels 14, and improves the convenience of connecting the air outlet channels 14 with the fan outlet 216.

[0101] In one embodiment, each air outlet section is provided with two channel groups. The air outlet channels 14 of the two channel groups are an upper air outlet channel and a lower air outlet channel, respectively. The air outlet port of the upper air outlet channel is located above the air outlet port of the adjacent lower air outlet channel, and the air inlet port of the upper air outlet channel is located behind the air inlet port of the connected lower air outlet channel.

[0102] The vertical spacing between the outlet ends of two adjacent air outlet channels 14 in two adjacent channel groups is d1, where 0.5mm ≤ d1 ≤ 2mm. This arrangement avoids the situation where the spacing between the outlet ports of two adjacent air outlet channels 14 is too small, resulting in a reduced overall vertical coverage area and making it difficult to achieve the enhanced protection effect of multi-layer air outlets. It also avoids the problem of oil fumes entering between the outlets of two adjacent air outlet channels 14 due to excessively large spacing, which could lead to complete stratification of the air outlets. d1 can be, but is not limited to, 0.5mm, 0.8mm, 1mm, 1.3mm, 1.5mm, 1.7mm, or 2mm.

[0103] The width of each air outlet duct 14 is W, 10mm ≤ W ≤ 15mm, to improve the uniformity of airflow in the left-right direction while avoiding increased processing difficulty and cost due to excessively small width of the air outlet duct 14. W can be, but is not limited to, 10mm, 11mm, 12mm, 13mm, 14mm, or 15mm. Figure 11 As shown, the distance between two adjacent air outlet channels 14 in the left and right directions is d2, where 2mm≤d2≤4mm.

[0104] On the projection plane perpendicular to the longitudinal plane of the air outlet, each air outlet channel 14 is an arc-shaped channel. The arc-shaped opening of the arc-shaped channel faces upward and backward, and the tangent of the air outlet end of the arc-shaped channel is set horizontally. This makes the airflow direction of the air outlet channel 14 approximately parallel to the front-back direction, allowing the airflow to flow better along the top of the smoke collector 301. At the same time, the arc-shaped air outlet channel 14 can improve the smoothness of airflow within the air outlet channel 14.

[0105] like Figure 12 and Figure 13 As shown, to better realize the arrangement of multiple air ducts 14, the air outlet base 1 includes a base plate 11 and at least two air guide plates 12. The base plate 11 has a vertically penetrating upper opening. Multiple air guide plates 12 are arranged at intervals from front to back, and each air guide plate 12 extends from top to bottom and back. The upper end of the air guide plate 12 located at the frontmost side is connected to the front edge of the upper opening, and the upper ends of the remaining air guide plates 12 are inserted into the upper opening and connected to the left and right side walls of the upper opening at both ends. Multiple partition plates 13 are arranged at intervals along the length direction on the upper side of each air guide plate 12. The rear side of the partition plate 13 located in the last row is connected to the rear side wall of the upper opening, and the rear side of the partition plates 13 in the remaining rows is connected to the adjacent air guide plate 12. The two adjacent partition plates 13 on the left and right sides and the corresponding air guide plate 12 form an air outlet duct 14.

[0106] For example, two air guide plate sections 12 are provided, namely a front air guide plate section and a rear air guide plate section. The front air guide plate section is spaced apart in front of the rear air guide plate section and its upper end is connected to the front edge of the upper opening. The upper end of the rear air guide plate section is located inside the upper opening and its left and right ends are connected to the left and right side walls of the upper opening, respectively. A front partition plate 13 is provided protruding from the upper side of the front air guide plate section. Multiple front partition plates 13 are spaced apart along the length direction, and the rear side of the front partition plate 13 is connected to the front edge of the upper opening and the extended edge of the front edge. A rear partition plate 13 is provided protruding from the upper side of the rear air guide plate section, and the rear side of the rear partition plate 13 is connected to the front air guide plate section. A first air outlet channel 14a is formed between two adjacent front partition plates 13 and between two rear partition plates 13 located in the first air outlet section 1a. A second air outlet channel 14b is formed between two adjacent front partition plates 13 and between two adjacent rear partition plates 13 located in the second air outlet section 1b.

[0107] It is worth noting that the partition plate 13 located between the two first air outlet sections 1a and the partition plate 13 located between the first air outlet section 1a and the adjacent second air outlet are partition plates 13c. The thickness and shape of the partition plate 13c are different from the thickness of the first partition plate 13a and the second partition plate 13b, so as to facilitate the identification of different air outlet sections.

[0108] In one embodiment, two air curtain fans 2 are spaced apart along the left-right direction, and the air outlet 216 of each air curtain fan 2 is connected to the air inlet port of the first air outlet channel 14a and the second air outlet channel 14b located on the same side of the longitudinal surface of the air outlet. This arrangement can reduce the air volume required by a single air curtain fan 2, thereby reducing the size of a single air curtain fan 2; at the same time, this arrangement can control the two air curtain fans 2 separately according to the cooking state. For example, when only one burner is used, only the air curtain fan 2 on the corresponding side can be controlled to start operation, thereby ensuring the effect of the air curtain blocking the escape of oil fumes while reducing the energy consumption of the range hood.

[0109] In other embodiments, one air curtain fan 2 may also be provided. It is worth noting that when the area to be covered by the air curtain formed by the air curtain device 100 is small, such as when only the temperature sensing module 200 needs to be protected, the length of the air curtain device 100 in the left and right direction can be relatively short, and only one air curtain fan 2 may be provided; when the length of the air curtain device 100 in the left and right direction is long, only one air curtain fan 2 may be provided in the middle of the air outlet base 1, and an air guiding structure may be provided to guide part of the airflow generated by the air curtain fan 2 to the air outlet sections on both sides.

[0110] In one embodiment, the air curtain fan 2 is an elongated structure extending in the left-right direction, and the fan outlet 216 covers the upper ends of the first air outlet section 1a and the second air outlet section 1b on the corresponding side. This arrangement can increase the coverage range of the airflow from the air curtain fan 2 in the left-right direction, thereby improving the uniformity of airflow in each air outlet channel 14.

[0111] like Figures 8 to 14 As shown, in one embodiment, the air curtain fan 2 includes a fan cover 21, an impeller 22, and a drive motor 23. The fan cover 21 is detachably installed on the upper side of the air outlet base 1. The fan cover 21 is a long strip structure extending in the left-right direction and has an air cavity 214. A fan outlet 216 communicating with the air cavity 214 is opened on the lower side of the fan cover 21, and a fan inlet 215 communicating with the air cavity 214 is provided on the rear side of the fan cover 21. The impeller 22 is installed in the air cavity 214 and extends in the left-right direction. The two ends of the impeller 22 are rotatably installed on the left and right sides of the fan cover 21. The drive motor 23 is installed on the outside of the fan cover 21 and connected to one end of the impeller 22. The drive motor 23 drives the impeller 22 to rotate so that the outside air can sequentially pass through the air inlet 307, the oil separator 306, the fan inlet 215, the air cavity 214, and the fan outlet 216 into each air outlet channel 14.

[0112] In another embodiment, an air cavity 214 may be provided at the upper end of the air outlet base 1. The air inlet end of each air outlet channel 14 is connected to the air cavity 214. Multiple ventilation openings are provided on the upper side wall of the air cavity 214. The multiple ventilation openings are spaced apart along the length direction. The air curtain fan 2 adopts a small axial flow fan or a centrifugal fan, and the air curtain fan 2 is set in correspondence with the multiple ventilation openings to meet the requirements of air outlet uniformity.

[0113] The fan cover 21 includes an arc-shaped side wall 211 and two end plates 212 connected to both ends of the side wall 211. The side wall 211 extends in the left-right direction, and the side wall 211 and the two end plates 212 enclose an air cavity 214. A fan outlet 216 is provided on the lower side of the side wall 211, and a fan inlet 215 is provided on the rear side. The two end plates 212 of the two air curtain fans 2 are arranged opposite each other and abut against each other or have a small gap to ensure that the fan outlet 216 fully covers the corresponding air outlet channel 14 and reduces the distance between the two adjacent first air outlet channels 14a of the two adjacent first air outlet sections 1a. The drive motor 23 is installed on the outside of the end plate 212 of the fan cover 21 away from the other air curtain fan 2 to avoid interference between the drive motor 23 and the other air curtain fan 2.

[0114] To improve the ease of installation of the air curtain fan 2 on the air outlet base 1, fixed side plates 213 extend from the opposite sides of the fan outlet 216. The left and right ends of the fixed side plates are connected to two end plates 212 respectively. The fixed side plates 213 are fitted and securely fastened to the upper surface of the air outlet base 1. Specifically, the fixed side plates are securely connected to the air outlet base 1 using fasteners. Multiple fasteners are spaced apart along the left-right direction to ensure the stability of the fan cover 21 on the mounting base 3 on the air outlet base 1. The fixed side plates 213 of the fan cover 21 are fitted and securely fastened to the upper side of the base plate 11.

[0115] Furthermore, the upper end of the air outlet base 1 is provided with a fixing lug, and both end plates 212 are provided with connecting structures. The fixing lug and the connecting structure are detachably connected by fasteners to ensure the installation stability and reliability of both ends of the air outlet cover on the air outlet base 1. Among them, the front side of the two oppositely arranged end plates 212 is provided with a boss-shaped connecting structure, and the front and rear sides of the two back-to-back end plates 212 are folded with flanges, which form the connecting structure.

[0116] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0117] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An air curtain device, characterized in that, include: An air outlet base (1) has two first air outlet sections (1a) arranged side by side in the left-right direction. Each first air outlet section (1a) is provided with a first air outlet channel (14a). The air outlet port of the first air outlet channel (14a) is arranged rearward and inclined towards a central longitudinal surface of the air outlet, so that the air outlets of the first air outlet channels (14a) of the two first air outlet sections (1a) converge at the rear side of the air outlet base (1) to form a protective area. The central longitudinal surface of the air outlet is located between the two first air outlet sections (1a) and is perpendicular to the left-right direction. An air curtain fan (2) is installed on the upper side of the air outlet base (1), and the air inlet ports of all the first air outlet channels (14a) are connected to the air outlet (216) of the air curtain fan (2).

2. The air curtain device according to claim 1, characterized in that, Each of the first air outlet sections (1a) includes a plurality of first air outlet channels (14a) arranged separately along the left and right direction, and the first air outlet channels (14a) of the two first air outlet sections (1a) are arranged in a one-to-one correspondence; The air outlets of a plurality of first air outlet channels (14a) arranged in a direction away from the longitudinal surface of the air outlet are arranged from front to back at the intersection points of the air outlets of the first air outlet section (1a) and the corresponding first air outlet channel (14a) of another first air outlet section (1a).

3. The air curtain device according to claim 2, characterized in that, The two first air outlet sections (1a) are symmetrically arranged relative to the longitudinal direction of the air outlet; And / or, the length of the air outlet port of the first air outlet channel (14a) in the left-right direction is W, 10mm≤W≤15mm.

4. The air curtain device according to claim 2, characterized in that, Each of the first air outlet sections (1a) includes at least two rows of first channel groups, and each row of first channel groups includes multiple first air outlet channels (14a) arranged along the left and right directions. In the same first air outlet section (1a), the air outlet ports of multiple rows of first channel groups are arranged separately from top to bottom.

5. The air curtain device according to claim 4, characterized in that, In two adjacent first channel groups of the same first air outlet section (1a), the air outlet port of the first air outlet channel (14a) of the lower first channel group is located in front of the air inlet port of the first air outlet channel (14a) of the other first channel group. And / or, in the same first air outlet section (1a), the vertical distance between the air outlet ports of two adjacent first air outlet channels (14a) of two adjacent first channel groups is d1, 0.5mm≤d1≤2mm; And / or, the first air outlet channel (14a) is an arc-shaped channel, and the opening of the arc-shaped channel is arranged facing backward and upward.

6. The air curtain device according to claim 2, characterized in that, The angle between the air outlet direction corresponding to the first air outlet channel (14a) and the longitudinal surface of the air outlet is the air outlet tilt angle. The air outlet tilt angles of all the first air outlet channels (14a) located in the same first air outlet section (1a) are the same, or, in the same first air outlet section (1a), the air outlet tilt angles of multiple first air outlet channels (14a) arranged sequentially away from the longitudinal surface of the air outlet gradually increase.

7. The air curtain device according to claim 2, characterized in that, The width of the first air outlet duct (14a) in the left-right direction gradually decreases from the air inlet port to the air outlet port; And / or, for multiple first air outlet channels (14a) located in the same first air outlet section (1a), the width of the air outlet port of the first air outlet channel (14a) in the left-right direction gradually decreases in the direction away from the longitudinal surface of the air outlet.

8. The air curtain device according to any one of claims 1-7, characterized in that, The air outlet base (1) has two second air outlet sections (1b) spaced apart in the left-right direction. The two first air outlet sections (1a) are located between the two second air outlet sections (1b). Each second air outlet section (1b) has a plurality of second air outlet channels (14b) spaced apart in the left-right direction. The air outlet of the second air outlet channel (14b) is arranged facing backward or downward. The air inlet of the second air outlet channel (14b) is connected to the air outlet (216) of the fan.

9. The air curtain device according to claim 8, characterized in that, Two air curtain fans (2) are arranged at intervals along the left and right directions, and the air outlet (216) of each air curtain fan (2) is connected to the air inlet of the first air outlet channel (14a) and the second air outlet channel (14b) located on the same side of the air outlet longitudinal plane.

10. The air curtain device according to claim 9, characterized in that, The air curtain fan (2) is a long strip structure extending along the left and right direction, and the fan outlet (216) covers the upper ends of the first air outlet section (1a) and the second air outlet section (1b) on the corresponding side.

11. The air curtain device according to claim 8, characterized in that, Each second air outlet section (1b) is provided with at least two rows of second channel groups. Each row of second channel groups includes multiple second air outlet channels (14b) spaced apart along the left and right directions. In the same second air outlet section (1b), the air outlet ports of multiple rows of second channel groups are separated in the vertical direction.

12. A range hood, comprising a smoke collection hood (300) having a downwardly facing smoke-gathering top (301), characterized in that, The range hood further includes a temperature sensing module (200) and an air curtain device as described in any one of claims 1-11. The temperature sensing module (200) and the air curtain device are both installed on the smoke collection top (301) and the air outlet base (1) is located on the front side of the temperature sensing module (200). In the left-right direction, the temperature sensing module (200) is located between the two first air outlet sections (1a) and the temperature sensing module (200) is located within the protected area.

13. The range hood according to claim 12, characterized in that, The rear side of the air outlet base (1) is connected to the mounting base (3), and the temperature sensing module (200) can be detachably installed on the mounting base (3); And / or, the top of the smoke collection hood (301) has a temperature sensing mounting hole (3011) and an air curtain mounting hole (3012), the air outlet base (1) is installed in the air curtain mounting hole (3012) and the air curtain fan (2) is located inside the smoke collection hood (300), the smoke collection hood (300) has an air inlet (307), the temperature sensing module (200) is installed in the temperature sensing mounting hole (3011), the upper end of the temperature sensing module (200) is located inside the smoke collection hood (300) and the detection end is exposed through the temperature sensing mounting hole (3011).

14. The range hood according to claim 12 or 13, characterized in that, The smoke hood (300) is provided with an oil-separating cavity (306) above the smoke collection top (301). The oil-separating cavity (306) is separated from the smoke collection cavity (304) of the smoke hood (300) by an oil-separating plate (305) inside the smoke hood (300). The upper end of the temperature sensing module (200) and the air curtain fan (2) are both located in the oil-separating cavity (306). An air inlet (307) is provided on the upper side or left and right side walls of the oil-separating cavity (306).

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