A range hood

Abstract

The utility model belongs to the electric appliance technical field, specifically discloses a kind of range hood. Range hood includes fume collecting cover, temperature sensing module and air curtain device. The fume collecting cover has the fume gathering top portion being set downward, temperature sensing module is installed in the fume gathering top portion and is used to detect temperature downward;Air curtain device is installed in the fume gathering top portion and is located in the front side of the temperature sensing module, the air curtain device includes air curtain fan and air outlet pedestal, the air outlet pedestal has with the temperature sensing module front and back opposite arrangement's protective air outlet section, the protective air outlet section has air outlet port towards the temperature sensing module arrangement's protective air outlet passage, the air curtain fan is used to send air to the protective air outlet passage. The utility model can improve the oil fume protection performance to temperature sensing module, improve the detection sensitivity and reliability of temperature sensing module, improve the use experience of range hood.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, and in particular to 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] The technical problem solved by this utility model is to provide a range hood that can effectively solve the problem of reduced detection sensitivity and accuracy of the temperature sensing module caused by oil fumes adhering to it in existing range hoods.

[0006] The above-mentioned technical problems are solved by the following technical solutions:

[0007] A range hood includes a smoke collection hood having a downward-facing smoke-gathering top; the range hood further includes:

[0008] A temperature sensing module is installed on the top of the smoke collector and is used to detect the temperature downwards.

[0009] An air curtain device is installed on the top of the smoke collector and located in front of the temperature sensing module. The air curtain device includes an air curtain fan and an air outlet base. The air outlet base has a protective air outlet section that is directly opposite the front and rear of the temperature sensing module. The protective air outlet section has a protective air outlet channel with an air outlet port facing the temperature sensing module. The air curtain fan is used to deliver air to the protective air outlet channel.

[0010] Compared with the prior art, the range hood described in this utility model has the following advantages: by installing the temperature sensing module and the air curtain device on the top of the smoke collection and placing the air curtain device in front of the temperature sensing module, the airflow flowing out from the protective air outlet channel blows backward toward the temperature sensing module, thereby forming an airflow protection at the temperature sensing module and driving away the oil fumes near the temperature sensing module. This prevents oil fumes from adhering to the temperature sensing module and causing a decrease in the detection sensitivity and accuracy of the temperature sensing module, thus improving the user experience of the range hood.

[0011] In one embodiment, multiple protective air outlet channels are spaced apart along the left and right direction, and the air inlet of each protective air outlet channel is connected to the air outlet of the air curtain fan. The coverage area of ​​the multiple protective air outlet channels in the left and right direction covers the temperature sensing module.

[0012] And / or, the protective air outlet channel is an arc-shaped channel, the opening of the arc-shaped channel faces upward and backward, and the air inlet of the arc-shaped channel extends through the upper side of the air outlet base.

[0013] In one embodiment, the protective air outlet section includes a first channel group and two second channel groups respectively disposed on the left and right sides of the first channel group. Both the first channel group and the second channel group include a plurality of protective air outlet channels arranged side by side at intervals along the left and right direction.

[0014] The protective air outlet channel located in the second channel group is inclined from front to back in a direction away from the first channel group, and the air outlet direction of the protective air outlet channel located in the first channel group is perpendicular to the left and right direction.

[0015] In one embodiment, the protective air outlet section has at least two rows of air outlet channels, each row of air outlet channels includes multiple protective air outlet channels arranged in a left-right direction, and the air outlet ports of the multiple rows of air outlet channels are arranged sequentially from top to bottom.

[0016] In one embodiment, the distance between the two adjacent protective air outlet channels of two adjacent air outlet channel groups is d2, where 1mm≤d2≤5mm.

[0017] In one embodiment, the temperature sensing module is installed in the middle of the smoke hood in the left-right direction, the air outlet base includes two side air outlet sections, the protective air outlet section is located between the two side air outlet sections, each side air outlet section includes a side air outlet channel, the air inlet of the side air outlet channel is connected to the air outlet of the air curtain fan, and the air outlet of the side air outlet channel is arranged facing backward or downward.

[0018] In one embodiment, the air inlet of the side air outlet channel extends through the upper side of the air outlet base, the air outlet of the side air outlet channel is arranged downward, and the side air outlet channel extends forward at an angle from top to bottom.

[0019] In one embodiment, the top of the smoke collection is provided with a top smoke inlet, and two top smoke inlets are arranged side by side in the left-right direction. In the left-right direction, the two side air outlets are respectively arranged directly opposite the two top smoke inlets.

[0020] In one embodiment, a mounting base is connected to the rear side of the protective air outlet section, and the temperature sensing module is detachably mounted on the mounting base;

[0021] 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.

[0022] In one embodiment, an oil separator is provided inside the smoke hood, which divides the inner cavity of the smoke hood into an oil separator chamber and a smoke collection chamber. The air inlet is connected to the oil separator chamber, and the upper end of the temperature sensing module and the air curtain fan are both located inside the oil separator chamber. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the range hood provided in Embodiment 1 of the present invention from one perspective;

[0024] Figure 2 This is a structural schematic diagram of the range hood provided in Embodiment 1 of this utility model from another perspective;

[0025] Figure 3 This is a schematic diagram of the disassembled structure of the range hood provided in Embodiment 1 of this utility model;

[0026] Figure 4 This is a partial structural cross-sectional view of the range hood provided in Embodiment 1 of this utility model;

[0027] Figure 5 for Figure 4 A magnified view of a section at point I;

[0028] Figure 6 This is a partial structural cross-sectional view of the range hood provided in Embodiment 1 of this utility model from another cross-section.

[0029] Figure 7 A schematic diagram of the flow of flue gas and air curtain provided in Embodiment 1 of this utility model;

[0030] Figure 8 This is a schematic diagram of the air curtain device provided in Embodiment 1 of the present invention;

[0031] Figure 9 for Figure 8 A magnified view of a section at point J;

[0032] Figure 10 This is a rear view of the air curtain device provided in Embodiment 1 of the present utility model;

[0033] Figure 11 for Figure 10 A schematic diagram of the local structure in the middle;

[0034] Figure 12 This is a schematic diagram of the air outlet base provided in Embodiment 1 of the present invention from one perspective.

[0035] Figure 13 for Figure 12 A magnified view of a section at point K;

[0036] Figure 14 A schematic diagram of the air outlet base provided in Embodiment 1 of this utility model from another perspective;

[0037] Figure 15 This is a cross-sectional view of the air curtain fan provided in Embodiment 1 of this utility model.

[0038] Label Explanation:

[0039] 100. Air curtain device; 200. Temperature sensing module; 201. Main housing; 2011. Main cylinder section; 2012. Flange section; 202. End cap; 203. Temperature sensor probe; 204. Locking ring; 205. Locking gasket; 300. Smoke hood; 301. Smoke collection top; 3011. Temperature sensor 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; 501. Exhaust fan; 502. Air box;

[0040] 1. Air outlet base; 11. Protective air outlet section; 111. Protective air outlet duct; 111. First air outlet duct; 111b. Second air outlet duct; 112. First base plate; 113. Air guide plate; 114. First partition plate; 114a. Middle partition plate; 114b. Side partition plate; 12. Side air outlet section; 121. Side air outlet duct; 122. Second base plate; 123. Second partition plate;

[0041] 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; 217. Cavity partition; 22. Impeller; 23. Drive motor;

[0042] 3. Mounting base; 31. Mounting through hole. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] like Figures 1 to 5 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.

[0048] 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 501. The exhaust fan 501 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 501, allowing the controller to control the fan's operation based on the detection results from the temperature sensing module 200.

[0049] In this embodiment, the range hood also includes an air curtain device 100, which is installed on the top of the smoke collection 301 and located in front of the temperature sensing module 200. The air curtain device 100 includes an air outlet base 1 and an air curtain fan 2. The air outlet base 1 has a protective air outlet section 11 that is directly opposite the temperature sensing module 200. The protective air outlet section 11 has a protective air outlet channel 111 with the air outlet port facing the temperature sensing module 200. The air curtain fan 2 is used to send air to the protective air outlet channel 111.

[0050] The range hood provided in this embodiment, by installing the temperature sensing module 200 and the air curtain device 100 on the smoke collection top 301 and placing the air curtain device 100 in front of the temperature sensing module 200, causes the airflow flowing out from the protective air outlet 111 to blow backward toward the temperature sensing module 200, thereby forming an airflow protection at the temperature sensing module 200, driving away the oil fumes near the temperature sensing module 200, thus preventing the oil fumes from adhering to the temperature sensing module 200 and causing a decrease in the detection sensitivity and accuracy of the temperature sensing module 200, and improving the user experience of the range hood.

[0051] 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, with the upper end of the smoke collection side section connected to the rear end of the smoke collection horizontal section; the extraction module 500 includes a wind box 502 and an extraction fan 501 installed in the wind box 502, and the wind box 502 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 oil fume extraction effect. The smoke inlet located in the smoke collection horizontal section is a top smoke inlet 302, the smoke collection side section has 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.

[0052] In other embodiments, the range hood can also be a top-mounted range hood; that is, the smoke collection hood 300 only has a smoke inlet at the top, located behind the temperature sensing module 200; in another embodiment, the range hood can also be a side-mounted range hood. In yet another embodiment, the range hood can also be a combined range hood and cooktop unit or other device capable of extracting and exhausting cooking fumes.

[0053] It is worth noting that this utility model uses a 7-shaped range hood as an example to illustrate the setting of the temperature sensing module 200 and the air curtain device 100 on the range hood. However, it is understood that the setting of the temperature sensing module 200 and the air curtain device 100 on other models of range hoods can refer to the setting of this utility model. This utility model will not list them one by one.

[0054] 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.

[0055] 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 protective air outlet sections 11, with the two sets of protective air outlet sections 11 corresponding to the two temperature sensing modules 200.

[0056] 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.

[0057] 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.

[0058] It is worth noting that the specific structures of the exhaust module 500, the smoke hood 300, and the lighting module 400 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.

[0059] like Figures 3 to 5 As shown, to improve the ease of installation 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 temperature sensing module 200 is installed in the temperature sensing mounting hole 3011, with its upper end located inside the smoke collection hood 300 and its detection end exposed through the temperature sensing mounting hole 3011. By providing 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 has a long, strip-shaped hole structure.

[0060] 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 wall 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 protective air outlet channel 111. The oil-separating chamber 306 prevents oil fumes from entering the oil-separating chamber 306 and causing the airflow flowing out of the protective air outlet channel 111 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.

[0061] 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.

[0062] 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.

[0063] The temperature sensing module 200 includes a mounting housing and a temperature sensing probe 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 probe 203 is installed inside the mounting housing, and the detection head of the temperature sensing probe 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 probe 203.

[0064] It is worth noting that the temperature sensor 203 employs a non-contact temperature detection principle, such as infrared thermometry. The temperature sensor 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 sensor 203.

[0065] To facilitate the installation and removal of the temperature sensor 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 mounted 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 sensor mounting hole 3011.

[0066] In one embodiment, a mounting base 3 is connected to the rear side of the protective air outlet section 11, 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 protective air outlet channel 111, ensuring the protective effect of the airflow from the protective air outlet channel 111 on the temperature sensing module 200. In other embodiments, the temperature sensing module 200 and the air curtain device 100 can also be separately configured and installed on the smoke hood 300.

[0067] 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.

[0068] 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 probe 203 is passed through the temperature sensing mounting hole 3011 and the mounting through hole 31 from bottom to top until the flange 2012 is in contact with 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.

[0069] 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 and is provided with a fixing ear. The fixing ear is detachably connected to the mounting base 3, which also allows the temperature sensing module 200 to be fixed on the mounting base 3.

[0070] 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.

[0071] like Figures 5 to 7 As shown, in one embodiment, the air outlet base 1 includes two side air outlet sections 12, and the protective air outlet section 11 is located between the two side air outlet sections 12. Each side air outlet section 12 includes a side air outlet channel 121. The air inlet of the side air outlet channel 121 is connected to the fan outlet 216 of the air curtain fan 2. The air outlet of the side air outlet channel 121 is arranged facing backward or downward.

[0072] By setting a side air outlet section 12 with a side air outlet channel 121, if the air outlet port of the side air outlet channel 121 is set downward, an air curtain can be formed in front of the user through the downward air outlet of the side air outlet channel 121, preventing the oil fumes from escaping forward to the user's front, and at the same time, it is conducive to driving the oil fumes to the smoke inlet, improving the smoke collection effect; if the air outlet port of the side air outlet channel 121 is set backward, the airflow from the side air outlet channel 121 flows backward, which can cut off the oil fumes flowing forward, so that the oil 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 oil fumes from escaping.

[0073] like Figure 5 , Figure 10 and Figure 11 As shown, to improve the protection performance against temperature sensors, multiple protective air outlet channels 111 are spaced apart along the left and right directions. The air inlet of each protective air outlet channel 111 is connected to the air outlet 216 of the air curtain fan 2. The coverage area of ​​the multiple protective air outlet channels 111 in the left and right directions covers the temperature sensor module 200. By setting multiple protective air outlet channels 111, it is possible to ensure that the air outlet coverage area of ​​the protective air outlet section 11 can cover the temperature sensor module 200, while improving the uniformity of air outlet in the left and right directions, and avoiding the problem of insufficient air outlet in some areas, resulting in large gaps in the airflow protection layer.

[0074] In one embodiment, the length L2 of the protective air outlet section 11 is 80mm ≤ L2 ≤ 300mm. This setting ensures that the airflow from the two protective air outlet sections 11 can effectively protect the temperature sensing module 200 while also effectively blocking the flow of oil fumes between the two top smoke inlets 302, guiding the fumes between the two top smoke inlets 302 to the top smoke inlets 302. At the same time, setting L2 to be less than or equal to avoid the protective air outlet section 11 being too long, which would reduce the length of the side air outlet section 12 and weaken the effect of the air curtain device 100 in preventing the lateral escape of oil fumes.

[0075] Furthermore, 80mm≤L2≤150mm is used to increase the length of the two protective air outlet sections 11 while ensuring the protection effect on the temperature sensing module 200. L2 can be, but is not limited to, 80mm, 83mm, 85mm, 87mm, 90mm, 93mm, 95mm, 97mm, 100mm, 105mm, 110mm, 115mm, 120mm, 130mm, 140mm, or 150mm.

[0076] The total air outlet length L0 of the air curtain device 100 is 600mm to 800mm, 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 and right direction, the smoke inlets are located between the two ends of the air outlet area of ​​the air curtain device 100. This allows 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 L0 of the air curtain device 100 can be, but is not limited to, 600mm, 620mm, 640mm, 660mm, 680mm, 700mm, 720mm, 730mm, 740mm, 750mm, 760mm, 770mm, 780mm, 790mm, or 800mm.

[0077] In one embodiment, the protective air outlet section 11 includes a first channel group and two second channel groups respectively disposed on the left and right sides of the first channel group. Both the first channel group and the second channel group include a plurality of protective air outlet channels 111 arranged side by side at intervals along the left and right direction. The protective air outlet channel 111 located in the second channel group is inclined from front to back along the direction away from the first channel group, and the air outlet direction of the protective air outlet channel 111 located in the first channel group is perpendicular to the left and right direction.

[0078] For ease of description, the protective air outlet channel 111 located in the first channel group is referred to as the first air outlet channel 111a, and the protective air outlet channel 111 located in the second channel group is referred to as the second air outlet channel 111b. The air outlet direction of the first air outlet channel 111a is perpendicular to the left and right direction, and the air outlet direction of the second air outlet channel 111b is set at an angle to the vertical plane. By setting up the first air outlet channel 111a, the air outlet of the first air outlet channel 111a can blow directly towards the temperature sensing module 200 in the front-to-back direction, thereby facilitating the enclosure of the temperature sensing module 200 and forming a protective airflow at the temperature sensing module 200. By setting up the second air outlet channel 111b, and the air outlet direction of the second air outlet channel 111b is blown away from the temperature sensing module 200 from front to back, the airflow blown out by the second air outlet channels 111b of the two second channel groups can drive away the smoke flowing towards the temperature sensing module 200 from the left and right sides, and drive the smoke to the smoke inlets on the left and right sides, thereby improving the oil fume isolation effect.

[0079] In one embodiment, the coverage length of the first channel group in the left-right direction is L1, where 20mm ≤ L1 ≤ 50mm. This ensures that the air outlet range of the first channel group can cover the temperature sensing module 200, thereby guaranteeing that the air outlet of the protective air outlet channel 111 of the first channel group can effectively form airflow protection at the temperature sensing module 200. It also avoids the situation where the length L is too large, leading to a mismatch between the airflow and the fume removal effect, resulting in wasted airflow. Specifically, L1 can be, but is not limited to, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, or 50mm.

[0080] It is worth noting that, in one embodiment, adjacent protective air outlet channels 111 are separated by partition plates. The partition plates on both sides of the first air outlet channel 111a are perpendicular to the left and right directions. The second air outlet channel 111b adjacent to the first air outlet channel 111a shares a partition plate with the first air outlet channel 111a. That is, one side of the channel wall of the second air outlet channel 111b adjacent to the first air outlet channel 111a can be perpendicular to the left and right directions, while the other side of the channel wall is formed by a partition plate that is inclined relative to the left and right directions. The other two opposite channel walls of the second air outlet channel 111b are also formed by partition plates that are inclined relative to the left and right directions. However, it can be understood that the partition plate located between the first air outlet channel 111a and the second air outlet channel 111b can have one side closer to the first air outlet channel 111a that is perpendicular to the left and right directions, and one side closer to the second air outlet channel 111b that is inclined relative to the left and right directions.

[0081] In one embodiment, the angle between the air outlet direction of the protective air outlet 111 in the second channel group and the vertical plane perpendicular to the left and right directions is A, where 10°≤A≤45°, that is, the angle between the second air outlet 111b and the vertical plane is A. By setting A to be greater than or equal to 10°, it is beneficial to achieve the tilted air outlet of the second air outlet 111b to the rear and left and right corresponding sides, thereby facilitating the lateral driving of the smoke. At the same time, setting A to be less than or equal to 45° can avoid the problem that the air outlet angle of the second air outlet 111b is too large, resulting in a large momentum in the left and right directions and a small momentum in the front and back directions. This would cause the air outlet of the second air outlet 111b to be concentrated on the top front side of the smoke collection hood 300, making it difficult to drive the smoke to the rear smoke inlet, thus resulting in a poor smoke isolation and driving effect. For example, A may be, but is not limited to, 10°, 15°, 20°, 25°, 30°, 35°, 40° or 45°.

[0082] In one embodiment, the width of each protective air outlet channel 111 is W, 10mm≤W≤15mm, so as to improve the uniformity of the airflow in the left and right directions while avoiding the problem of increased processing difficulty and processing cost due to the excessively small width of the protective air outlet channel 111. W can be, but is not limited to, 10mm, 11mm, 12mm, 13mm, 14mm or 15mm.

[0083] The distance between two adjacent protective air outlet channels 111 in the left and right directions is d1, 0.5mm≤d1≤4mm. This setting can avoid the problem that d1 is too small, which would make it difficult to process and form the first air outlet section. At the same time, it can also avoid the problem that d1 is too large, which would cause a large separation in the left and right directions of the air outlets of adjacent protective air outlet channels 111, thus causing the flue gas to pass between the two air outlets and act on the temperature sensing module 200.

[0084] On a projection plane perpendicular to the preset longitudinal plane, each protective air outlet channel 111 is an arc-shaped channel. The arc-shaped opening of the protective 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 protective air outlet channel 111 roughly 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 design of the protective air outlet channel 111 can improve the smoothness of airflow within the outlet channel.

[0085] In one embodiment, the protective air outlet channel 111 has a rectangular cross-section, meaning that both the air inlet and outlet of the protective air outlet channel 111 are rectangular. This reduces the processing difficulty of the protective air outlet channel 111 and improves the smoothness of airflow. In other embodiments, the cross-section of the protective air outlet channel 111 can be circular, elliptical, or polygonal, etc.

[0086] In one embodiment, the width of each protective air outlet channel 111 in the left-right direction is approximately the same from the air inlet to the air outlet, thereby reducing the processing difficulty of the protective air outlet channel 111. In other embodiments, the width of the protective air outlet channel 111 in the left-right direction can gradually decrease from the air inlet to the air outlet, thereby accelerating the airflow exiting the protective air outlet channel 111, increasing the airflow momentum of the protective air outlet channel 111, and thus improving the obstruction and guidance effect of the protective air outlet channel 111 on the flue gas.

[0087] In one embodiment, the protective air outlet section 11 has at least two rows of air outlet channels. Each row of air outlet channels includes multiple protective air outlet channels 111 arranged separately in the left-right direction. The air outlet ports of the protective air outlet channels 111 in the multiple rows of air outlet channels are arranged sequentially from top to bottom. This arrangement allows the protective air outlet section 11 to form multi-layer air outlets, thereby increasing the coverage of the airflow in the height direction of the protective air outlet section 11, improving the blocking and diversion effect of the protective air outlet section 11 on the flow of flue gas, and thus improving the protection effect of the air outlet of the protective air outlet section 11 on the temperature sensing module 200. The protective air outlet channels 111 corresponding to the multiple rows of air outlet channels are arranged one-to-one to reduce the processing difficulty of the protective air outlet section 11.

[0088] The air inlet ports of the multiple air outlet channels arranged from top to bottom all pass through the air outlet base 1 and are arranged from front to back. That is, in two adjacent air outlet channels, the air inlet port of the upper air outlet channel is located behind the air inlet port of the other air outlet channel. This arrangement makes it easier to process and shape the air outlet base 1, improves the convenience of setting up the air outlet channels, reduces the probability of mutual interference between air outlet channels, and improves the convenience of connecting the air outlet channels with the fan outlet 216.

[0089] In one embodiment, the protective air outlet section 11 is provided with two rows of air outlet channels. The air outlet end of the upper air outlet channel is located above the air outlet end of the lower air outlet channel, and the air inlet end of the upper air outlet channel is located in front of the air inlet end of the lower air outlet channel. In other embodiments, the number of rows of the protective air outlet channel 111 can be set to other quantities as needed, such as three or more rows.

[0090] The vertical distance between the two adjacent protective air outlets of two adjacent rows of air outlet ducts is d2, where 2mm ≤ d2 ≤ 4mm. This arrangement avoids the situation where the distance between the outlet ports of two adjacent rows of protective air outlet ducts 111 is too small, resulting in a reduced overall vertical coverage area and making it difficult to achieve the effect of multi-layered air outlets for enhanced protection. It also avoids the problem of oil fumes entering between the outlets of two layers of protective air outlet ducts 111 due to excessively large distances. d2 can be, but is not limited to, 2mm, 2.3mm, 2.5mm, 2.7mm, 3mm, 3.3mm, 3.5mm, 3.7mm, and 4mm.

[0091] like Figure 13 and Figure 14As shown, to better realize the setting of multiple air ducts, the protective air outlet section 11 includes a first base plate 112 and at least two air guide plates 113. The first base plate 112 has a vertically penetrating first opening. Multiple air guide plates 113 are arranged at intervals from front to back, and each air guide plate 113 extends from top to bottom and back. The upper end of the air guide plate 113 located at the frontmost side is connected to the front edge of the first opening, and the upper ends of the remaining air guide plates 113 are inserted into the first opening and connected to the left and right side walls of the first opening at both ends. Multiple first partition plates 114 are arranged at intervals along the length direction on the upper side of each air guide plate 113. The rear side of the first partition plate 114 located in the last row is connected to the rear side wall of the first opening, and the rear side of the first partition plates 114 in the remaining rows is connected to the adjacent air guide plate 113. Two adjacent first partition plates 114 and the corresponding air guide plate 113 form a protective air outlet channel 111.

[0092] By setting multiple air guide plates 113 to separate multiple air outlet channels, it is beneficial to reduce the processing difficulty of the protective air outlet section 11, and the airflow direction of the protective air outlet channel 111 can be controlled by the shape of the air guide plates 113; by setting the first partition plate 114 to separate the air outlet channels, the structure of the air outlet base 1 can be simplified, and the tilt angle of the protective air outlet channel 111 relative to the preset longitudinal plane can be controlled by the tilt angle of the first partition plate 114a relative to the vertical plane perpendicular to the left and right directions.

[0093] For example, there are two air guide plate sections 113, 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 first opening. The upper end of the rear air guide plate section is located inside the first opening and its left and right ends are respectively connected to the left and right side walls of the first opening. A first partition plate 114 is provided protruding from the upper side of the front air guide plate section, and multiple first partition plates 114 are spaced apart along the length direction. The rear side of the first partition plate 114 is connected to the front edge of the first opening and the extended edge of the front edge. A first partition plate 114 is provided protruding from the upper side of the rear air guide plate section, and the rear side of the first partition plate 114 is connected to the front air guide plate section.

[0094] Of the multiple first partitions 114, the first partition 114 located in the middle portion in the left-right direction is the central partition 114a, and the first partitions 114 located on both sides in the left-right direction are the side partitions 114b. The protective air outlet channel 111 between two adjacent central partitions 114a is the first air outlet channel 111a, the protective air outlet channel 111 between two adjacent side partitions 114b is the second air outlet channel 111b, and the protective air outlet channel 111 between adjacent side partitions 114b and central partition 114a is the second air outlet channel 111b. The central partition 114a is perpendicular to the left-right direction, and the side partitions 114b are inclined from front to back in a direction away from the central partition 114a.

[0095] like Figure 6 , Figure 13 and Figure 14 As shown, in one embodiment, the air inlet of the side air outlet duct 121 extends through the upper side of the air outlet base 1, the air outlet of the side air outlet duct 121 is set downward, and the side air outlet duct 121 extends forward at an angle from top to bottom. This arrangement allows the air outlet of the side air outlet duct 121 to form an air curtain in front of the user, preventing the oil fumes from escaping forward; at the same time, by extending the side air outlet duct 121 at an angle from top to bottom, the airflow blown out by the side air outlet duct 121 has a forward motion component when it flows out. Since the air outlet of the side air outlet duct 121 will move backward under the negative pressure generated during the oil fume extraction process, setting the air outlet direction of the side air outlet duct 121 to be tilted forward can compensate for the backward movement of the air curtain under the negative pressure, thereby expanding the coverage range of the air outlet of the side air outlet duct 121 in the front-to-back direction.

[0096] In one embodiment, the angle between the extension direction of the side air outlet duct 121 and the vertical direction is 5°≤B≤20°. This arrangement avoids the situation where the angle between the air outlet direction of the side air outlet duct 121 and the vertical direction is too small, which would prevent it from effectively widening the air outlet coverage of the side air outlet section 12. It also avoids the problem of the airflow potentially blowing directly onto the user and causing a poor user experience due to the extension direction of the side air outlet duct 121 being too large relative to the vertical direction. For example, B can be, but is not limited to, 5°, 8°, 10°, 13°, 15°, 18°, or 20°.

[0097] In one embodiment, for each side air outlet section 12, multiple rows of side air outlet channels 121 are arranged at intervals along the front-to-back direction. Each row includes multiple side air outlet channels 121 arranged at intervals along the left-to-right direction. The multiple rows of side air outlet channels 121 in the same side air outlet section 12 are arranged in a one-to-one correspondence, and the side air outlet channels 121 in each side air outlet section 12 are arranged in an array. This arrangement enables the side air outlet section 12 to form a multi-layer air curtain, increasing the thickness of the air curtain formed by the side air outlet section 12 and improving the protective performance of the air curtain against oil fumes.

[0098] To simplify the structure of the side air outlet section 12, the side air outlet section 12 includes a second base plate portion 122, and a first base plate portion 112 is connected between the two second base plate portions 122. The second base plate portion 122 has a second opening that extends vertically through it. A plurality of crisscrossing second partition plates 123 are provided in the second opening to divide the second opening into a plurality of side air outlet channels 121. Among them, the second partition plates 123 extending in the left-right direction are horizontal partition plates, and the partition plates extending in the front-back direction are vertical partition plates. The horizontal partition plates are inclined forward from top to bottom to control the inclination direction of the side air outlet channels 121 between two adjacent horizontal partition plates.

[0099] like Figure 8 , Figure 9 and Figure 15 As shown, in one embodiment, the upper surfaces of the first base plate 112 and the second base plate 122 are flush, and the first base plate 112 and the two second base plates 122 are integrally formed to form the top plate of the air outlet base 1. The air curtain fan 2 is installed on the top plate to simplify the connection structure between the air curtain fan 2 and the air outlet base 1.

[0100] In one embodiment, the air outlet 216 of the air curtain fan 2 extends in the left and right direction and covers the air inlet ports of all protective air outlet channels 111 and side air outlet channels 121, thereby improving the air outlet uniformity of each side air outlet channel 121 and protective air outlet channel 111.

[0101] In another embodiment, the protective air outlet section 11 and the two side air outlet sections 12 may each be equipped with an air curtain fan 2. In yet another embodiment, an air cavity 214 may be provided at the upper end of the air outlet base 1, and the air inlet end of each air outlet channel is connected to the air cavity 214. The upper cavity wall of the air cavity 214 is provided with multiple ventilation openings, which are spaced apart along the length direction. The air curtain fan 2 is a small axial flow fan or a centrifugal fan, and the air curtain fan 2 is arranged in a one-to-one correspondence with the multiple ventilation openings to meet the requirements of air outlet uniformity.

[0102] 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 extends in the left-right direction and is rotatably installed inside the fan cover 21. The drive motor 23 is installed on the outer side 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 external 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.

[0103] 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 a wind 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 drive motor 23 is mounted on the outside of one end plate 212.

[0104] In one embodiment, the air chamber 214 is divided into multiple sub-air chambers by multiple cavity partitions 217. Multiple impellers 22 are coaxially arranged side-by-side, with each impeller 22 corresponding to one of the multiple sub-air chambers. The shafts of all impellers 22 are coaxially connected to achieve synchronous rotation. Both ends of each impeller 22 are rotatably supported on the opposite side walls of the sub-air chamber. A drive motor 23 is connected to the shaft of one of the impellers 22. This reduces the length of each impeller 22, lowering the manufacturing difficulty; it also avoids the problem of insufficient overall structural strength and rigidity caused by a long fan shroud 21.

[0105] 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 213 are connected to two end plates 212 respectively, and the fixed side plates 213 are fitted and secured to the upper surface of the air outlet base 1. Specifically, the fixed side plates are securely connected to the air outlet base 1 by fasteners, and multiple fasteners are spaced apart along the left and right direction to ensure the installation stability of the fan cover 21 on the mounting base 3 on the air outlet base 1.

[0106] Furthermore, the upper end of the air outlet base 1 is provided with a fixing lug, and the two end plates 212 and the cavity partition 217 are provided with a connecting structure. The fixing lug and the connecting structure are detachably connected by fasteners to ensure the installation stability and reliability of the fan cover 21 on the air outlet base 1.

[0107] 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.

[0108] 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. A range hood, comprising a smoke collection hood (300), said smoke collection hood (300) having a downwardly facing smoke-gathering top (301), characterized in that, The range hood also includes: A temperature sensing module (200) is installed on the top of the smoke collector (301) and is used to detect the temperature downwards; An air curtain device (100) is installed on the top of the smoke collection unit (301) and located in front of the temperature sensing module (200). The air curtain device (100) includes an air curtain fan (2) and an air outlet base (1). The air outlet base (1) has a protective air outlet section (11) arranged directly opposite the front and rear of the temperature sensing module (200). The protective air outlet section (11) has a protective air outlet channel (111) with the air outlet port facing the temperature sensing module (200). The air curtain fan (2) is used to supply air to the protective air outlet channel (111).

2. The range hood according to claim 1, characterized in that, The protective air outlet channel (111) is provided in multiple intervals along the left and right direction. The air inlet of each protective air outlet channel (111) is connected to the air outlet (216) of the air curtain fan (2). The coverage of the multiple protective air outlet channels (111) in the left and right direction covers the temperature sensing module (200). And / or, the protective air outlet channel (111) is an arc-shaped channel with the opening of the arc-shaped channel facing upward and backward, and the air inlet of the arc-shaped channel penetrates the upper side of the air outlet base (1).

3. The range hood according to claim 2, characterized in that, The protective air outlet section (11) includes a first channel group and two second channel groups respectively arranged on the left and right sides of the first channel group. Both the first channel group and the second channel group include a plurality of protective air outlet channels (111) arranged side by side at intervals along the left and right direction. The protective air outlet channel (111) located in the second channel group is inclined from front to back in a direction away from the first channel group, and the air outlet direction of the protective air outlet channel (111) located in the first channel group is perpendicular to the left and right direction.

4. The range hood according to claim 2, characterized in that, The protective air outlet section (11) has at least two rows of air outlet channels. Each row of air outlet channels includes multiple protective air outlet channels (111) arranged in a left-right direction. The air outlet ports of the multiple rows of air outlet channels (111) are arranged sequentially from top to bottom.

5. The range hood according to claim 4, characterized in that, The distance between the two adjacent protective air outlet channels (111) of the two adjacent air outlet channel groups is d2, 1mm≤d2≤5mm.

6. The range hood according to any one of claims 1-5, characterized in that, The temperature sensing module (200) is installed in the middle of the smoke hood (300) along the left and right direction. The air outlet base (1) includes two side air outlet sections (12). The protective air outlet section (11) is located between the two side air outlet sections (12). Each side air outlet section (12) includes a side air outlet channel (121). The air inlet of the side air outlet channel (121) is connected to the fan outlet (216) of the air curtain fan (2). The air outlet of the side air outlet channel (121) is set to face backward or downward.

7. The range hood according to claim 6, characterized in that, The air inlet of the side air outlet channel (121) extends through the upper side of the air outlet base (1), the air outlet of the side air outlet channel (121) is set downward, and the side air outlet channel (121) extends forward at an angle from top to bottom.

8. The range hood according to claim 6, characterized in that, The top of the smoke collection point (301) is provided with a top smoke inlet (302). There are two top smoke inlets (302) arranged side by side in the left and right direction. In the left and right direction, the two side air outlet sections (12) are respectively arranged directly opposite the two top smoke inlets (302).

9. The range hood according to any one of claims 1-5, characterized in that, The rear side of the protective air outlet section (11) is connected to a 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).

10. The range hood according to claim 9, characterized in that, The smoke hood (300) is equipped with an oil separator (305) inside. The oil separator (305) divides the inner cavity of the smoke hood (300) into an oil separator chamber (306) and a smoke collection chamber (304). The air inlet (307) is connected to the oil separator chamber (306). The upper end of the temperature sensing module (200) and the air curtain fan (2) are both located in the oil separator chamber (306).

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