Air flow guiding assembly and range hood

Abstract

The present invention relates to an air diversion assembly and a range hood. By arranging a first inclined diversion surface and an inclined second diversion surface on the upper part of the front of the opening of the housing, there is a connecting section in the horizontal direction between the two diversion surfaces, thereby forming a first stepped portion, and a third diversion surface extends backward from the second diversion surface to form a second stepped portion. Thus, when the range hood is working, the external air flow forms a downward pressing vortex air flow along the first diversion surface at the first stepped portion, and further strengthens this vortex air flow at the second stepped portion, thereby playing a role in blocking the rising flue gas in the smoke collecting hood of the range hood, preventing overflow, enabling as much flue gas as possible to enter the suction port of the range hood, while increasing the suction volume of the range hood, avoiding the flue gas from entering the user's respiratory tract and causing discomfort to the user, and improving the user experience.

Description

Technical Field

[0001] The present invention relates to an air diversion assembly and a range hood, belonging to the technical field of range hoods. Background Art

[0002] Currently, range hood devices are generally divided into Chinese-style and European-style. The Chinese-style range hood is provided with a smoke suction hood with a downward opening, which can better absorb oil fumes compared to the planar smoke suction part of the European-style one, so as to meet the demand of Chinese families for more oil fumes during cooking. However, the smoke suction hood of the Chinese-style range hood is large in volume. If a relatively good smoke suction effect is required, it needs to be installed at a lower position, which is likely to block the user's view of the cooking range. And even with such installation, its smoke suction effect still cannot meet the needs of some scenarios with a lot of smoke or irritating gases. For example, when frying spicy ingredients, irritating gases are still easily generated, causing discomfort to the user, thus affecting the user experience. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to solve the problem that the existing Chinese-style range hood cannot meet the user's demand for oil fume suction effect.

[0004] The present invention first proposes an air diversion assembly for a range hood, including a housing. The housing has a top wall and an air outlet provided on the top wall.

[0005] A first diversion surface and an inclined second diversion surface are inclinedly provided on the upper part of the front surface of the housing. There is a connecting section in the horizontal direction between the two diversion surfaces. The second diversion surface extends backward to form a third diversion surface. The angle between the second diversion surface and the horizontal direction is smaller than the angle between the third diversion surface and the horizontal direction.

[0006] Optionally, the angle between the first diversion surface and the horizontal plane ranges from 91 degrees to 131 degrees; the length of the connecting section is n times the length of the first diversion surface, where the range of n is from 0.3 to 0.6; the distance between the connecting section and the top wall is M, and the length of the connecting section is L. The ratio of L to M ranges from 0.3 to 0.5.

[0007] Optionally, the first diversion surface is planar, and its free end extending downward exceeds the connecting section. The inner surface of the exceeding part forms a first eddy current area with the connecting section and the second diversion surface; the second diversion surface is connected to the third diversion surface. The free end of the second diversion surface extending downward exceeds the connection part of the third diversion surface. The inner surface of the exceeding part forms a second eddy current area with the third diversion section.

[0008] Optionally, long strip exhaust outlets are provided on the left and right sides of the third guide surface, and the exhaust outlets are arranged parallel to the first guide surface, and the non-air supply area is between the two exhaust outlets; the high-speed downward air outlet of the exhaust outlet forms a negative pressure drainage area, so that the airflow entering the third guide surface moves downward along the downward air outlet.

[0009] Optionally, it includes a bilaterally symmetrical exhaust air path, with an air inlet arranged on the top wall. The incoming air passes through the electrically controlled heat dissipation end and is pressurized by a fan before being discharged from the exhaust port. A guide member is arranged at the exhaust port, and the guide member is used to ensure that the exhaust air at each location has the same outlet direction.

[0010] Optionally, the fan is an axial flow fan arranged near a non-air supply area, with air outlet at one end of the exhaust port blowing toward the other end of the exhaust port. An exhaust cavity is formed on the exhaust port. When the two fans exhaust air, high-speed air supply areas are formed on both sides.

[0011] Optionally, the shell includes baffles arranged on both sides, the end faces of the baffles are on both sides of the first guide surface, and the side projections thereof are consistent with the first guide surface, and the baffles are on both sides of the second guide surface, and the side projections thereof are consistent with the second guide surface, so as to limit the airflow on the left and right sides; the baffles on both sides extend downward at the projection of the third guide surface.

[0012] The present invention also proposes a smoke extractor, comprising the above-mentioned air guide assembly, characterized in that: the shell forms a smoke collecting hood, the inner wall surface of the smoke collecting hood is a concave third guide surface, the projection of its front elevation forms a strip-shaped first air suction port at more than 1 / 3, and the air suction port forms a negative pressure area located at the concave part.

[0013] Optionally, the concave third guide surface extends downward, and a second air suction port is formed at the lower end of the front facade, and the second air suction port includes a receiving section that exceeds the third guide surface, and the receiving section and the lower end of the third guide surface form a circuitous air inlet duct portion.

[0014] Optionally, the lower end of the baffle continues to extend downward corresponding to the projection of the side of the second air suction port, and the lower end of the baffle is horizontally arranged, and the side edge of the baffle is formed to extend obliquely from the outside to the inside and connect to the horizontally arranged lower end.

[0015] The air diversion component for a range hood according to the present invention is provided with a first diversion surface and an inclined second diversion surface on the upper part of the front of the opening of the housing. There is a connecting section in the horizontal direction between the two diversion surfaces, thereby forming a first stepped portion, and a third diversion surface extends backward from the second diversion surface to form a second stepped portion. When the range hood is operating, the external air flow forms a downward-pressing vortex air flow at the first stepped portion along the first diversion surface, and further strengthens this vortex air flow at the second stepped portion, thus playing a role in blocking the rising flue gas in the smoke collecting hood of the range hood, preventing overflow, enabling as much flue gas as possible to enter the suction port of the range hood, improving the suction volume of the range hood while avoiding the flue gas from entering the user's respiratory tract and causing discomfort to the user, enhancing the user experience. Moreover, due to the blocking area formed by the vortex air flow, the smoke collecting hood of the range hood can be opened towards the user, different from the traditional range hood with a downward opening, so that the housing of the smoke collecting hood does not block the user's line of sight, facilitating the user's cooking and further enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the range hood according to an embodiment of the present invention;

[0017] Figure 2 is a front view of the range hood according to an embodiment of the present invention;

[0018] Figure 3 is Figure 2 a cross-sectional view taken along the line A-A in

[0019] Figure 4 is Figure 3 an enlarged view of A in

[0020] Figure 5 is a schematic diagram of the range hood according to an embodiment of the present invention forming a vortex air flow and a downward exhaust air flow;

[0021] Figure 6 is Figure 2 a cross-sectional view taken along the line B-B in

[0022] Figure 7 is Figure 6 an enlarged view of B in

[0023] Figure 8 is Figure 2 a cross-sectional view taken along the line C-C in

[0024] Figure 9 is Figure 8 an enlarged view of C in

[0025] Figure 10 is a perspective view of the range hood according to an embodiment of the present invention with a part of the upper part of the blower box removed;

[0026] Figure 11 Partial exploded view of the range hood according to an embodiment of the present invention;

[0027] Figure 12 Partial exploded view of the display component according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] Fan box 100, exhaust cavity 110, housing 200, smoke collecting hood 210, exhaust port 211, smoking port 212, second suction port 213, front panel 214, top wall 220, first guiding surface 221, connecting section 222, second guiding surface 223, third guiding surface 224, baffle 230, exhaust component 240, guiding net 241, pressing plate 242, axial flow fan 243, enclosing plate 250, air inlet section 261, narrow air duct section 262, expanding section 263, display part 270, panel sheet metal part 280, hole to be connected 281, recessed part 282, mounting hole 283, electric control box 300, radiator 310, oil sump 400, smoking fan 500, volute 600, display component 700, glass display panel 710, electric control component 720, touch control part 721, display unit 722, cover body 723, mounting post 730, elastic claw 740, pressing force receiving section 741, pulling force receiving section 742, fixing connecting piece 743. Detailed implementation manners

[0030] It should be noted that, on the premise that there is no conflict in structure or function, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below according to examples.

[0031] The present invention provides an air guiding component for a range hood, as Figures 1 to 7 shown, including a housing 200, the housing 200 has a top wall 220, and an exhaust port 211 provided on the top wall 220. A first guiding surface 221 is inclinedly arranged on the upper part of the front surface of the housing 200, and an inclined second guiding surface 223. There is a connecting section 222 in the horizontal direction between the two guiding surfaces. The second guiding surface 223 extends backward to have a third guiding surface 224, wherein the included angle between the second guiding surface 223 and the horizontal direction is smaller than the included angle between the third guiding surface 224 and the horizontal direction.

[0032] Among them, the housing 200 of the range hood faces the user, and the surface of the housing 200 facing the user forms a front panel 214. The front panel forms a smoke collecting hood 210, which is different from the smoke collecting hood 210 of the traditional Chinese range hood whose opening faces downward. A first guiding surface 221 is arranged on the upper end surface of the opening. A smoke suction port 212 is arranged in the smoke collecting hood 210. Both the first guiding surface 221 and the second guiding surface 223 are inclined inward. The first guiding surface 221, the second guiding surface 223 and the connecting section 222 in the horizontal direction connecting the two form a first step portion, and the second guiding surface 223 and the third guiding surface 224 form a second step portion. When the range hood is working, the fan inside the range hood rotates at a high speed, thereby forming a negative pressure in the opening area of the surface of the smoke collecting hood 210. A large amount of external air flow is sucked into the smoke collecting hood 210. Part of the external air flow is guided along the inclined downward first guiding surface 221, and the step surface of the first step portion formed at the connecting section 222 causes the air flow to flip, thereby forming a vortex air flow air1 as shown in Figure 5 When it enters the second step portion where the third guiding surface 224 is located, this vortex air flow is further strengthened. This vortex air flow forms an air flow blocking area to block the fumes from rising and overflowing along the inner wall surface of the smoke collecting hood 210 during the user's cooking, and also avoids the fumes reaching the user's head area and entering the user's respiratory tract, causing discomfort to the user. It makes the cooking fumes enter the smoke suction port 212 as much as possible after entering from below the smoke collecting hood 210 and will not overflow to the area where the user is located. The air outlet 211 on the top wall 220 outputs a downward blowing wind, which can further strengthen the negative pressure in the area where the first guiding surface 221 is located and guide the air flow in this area downward, so that more air flow enters downward along the first guiding surface 221 to form more vortex air flows, thereby playing a better role in preventing the rising fumes from overflowing. Moreover, the downward blowing wind also forms a downward barrier to a certain extent, further preventing the above-mentioned fumes from overflowing.

[0033] With the air diversion assembly for a range hood according to the present invention, a first diversion surface 221 and an inclined second diversion surface 223 are disposed obliquely at the upper front of the opening of the housing 200. There is a connecting section 222 in the horizontal direction between the two diversion surfaces, thereby forming a first step portion. And a third diversion surface 224 extends backward from the second diversion surface 223 to form a second step portion. Thus, when the range hood is operating, the external air flow forms a downward pressing vortex air flow along the first diversion surface 221 at the first step portion, and further strengthens this vortex air flow at the second step portion, thereby playing a role in blocking the rising flue gas in the smoke collecting hood 210 of the range hood, preventing overflow, and enabling as much flue gas as possible to enter the suction port 212 of the range hood. While increasing the smoke suction amount of the range hood, it avoids the flue gas entering the user's respiratory tract and causing discomfort to the user, improving the user experience. Moreover, due to the blocking area formed by the vortex air flow, the smoke collecting hood 210 of the range hood can face the user and open, different from the traditional range hood that opens downward, so that the housing 200 of the smoke collecting hood 210 does not block the user's line of sight, facilitating the user's cooking and further improving the user experience.

[0034] In some embodiments of the present invention, as Figure 4 shown, the angle a1 between the first diversion surface 221 and the horizontal plane ranges from 91 degrees to 131 degrees, specifically, it can be these values such as 91 degrees, 95 degrees, 101 degrees, 109 degrees, 111 degrees, 121 degrees, and 131 degrees; the length L2 of the connecting section 222 is 0.3 to 0.6 times the length L1 of the first diversion surface 221, specifically, it can be these values such as 0.3, 0.4, 0.5, 0.6; the distance between the connecting section 222 and the top wall 220 is H, and the ratio of L2 to H ranges from 0.3 to 0.5, specifically, it can be these values such as 0.3, 0.35, 0.43, 0.46, 0.5, so as to enable the external air flow to better form a vortex air flow between the first step portions after being guided along the first diversion surface 221.

[0035] In some embodiments of the present invention, the first diversion surface 221 is planar, and its free end extending downward exceeds the connecting section 222, and the inner surface of the exceeding part and the connecting section 222 and the second diversion surface 223 form a first vortex region. As Figure 5As shown, the planar first air guiding surface 221 inclines inward, and its free end extends beyond the part where the connecting section 222 is connected to the first air guiding surface 221. When the air flow flows downward along the first air guiding surface 221, due to the wall-attaching effect of the air flow, the direction changes at the connection between the free end and the connecting section 222, and then continues to advance along the surface of the connecting section 222. The air flow direction changes again at the connection between the connecting section 222 and the second air guiding surface 223 and advances along the second air guiding surface 223. In this way, the direction of the air flow bends twice, thus forming a vortex air flow air1. Moreover, the free end of the first air guiding surface 221 extends beyond the part where the connecting section 222 is connected to the first air guiding surface 221, so that there are plate surfaces extending in the same direction with bends at both ends of the connecting section 222. The first plate surface is the part where the free end of the first air guiding surface 221 extends beyond the part where the connecting section 222 is connected to the first air guiding surface 221, and the second plate surface is the second air guiding surface 223. Thus, the air flow is guided inward in the U-shaped cavity formed by the first plate surface, the connecting section 222, and the second plate surface, further strengthening the formation of the vortex air flow.

[0036] In some embodiments of the present invention, as Figure 5 shown, the second air guiding surface 223 is planar, and its free end extending downward extends beyond the connection of the third air guiding surface 224. The inner surface of the extended part forms a second vortex area with the third air guiding surface 224. As Figure X shown in X, the part where the free end of the second air guiding surface 223 extends beyond the third air guiding surface 224 forms a bent area with the third air guiding surface 224. When the air flow enters this bent area along the second air guiding surface 223, its direction changes inward again, thus forming another vortex air flow air2, so as to form an inner and outer double vortex air flow with the vortex air flow formed by the connecting section 222 part, playing a better role in blocking the overflow of the rising flue gas.

[0037] In some embodiments of the present invention, as Figure 5 and Figure 7 shown, strip-shaped air outlets 211 are arranged on the left and right sides of the third air guiding surface 224. The air outlets 211 are arranged parallel to the first air guiding surface 221, and the non-air supply area is between the two air outlets 211; the high-speed downward air outlet air3 of the air outlets 211 forms a negative pressure drainage area, so that the air flow entering the third air guiding surface 224 flows downward along this downward air outlet. The air outlets 211 are arranged on the inner side of the third air guiding surface 224 relative to the second air guiding surface 223, and the strip-shaped arrangement direction of the air outlets 211 is parallel to the first air guiding surface 221. Thus, negative pressure areas are formed on the left and right sides close to the second air guiding surface 223, so that the vortex air flow formed at the connecting section 222 is attracted and pressed downward along this downward air outlet, thus accelerating the movement speed of the vortex air flow, strengthening the formation of a blocking area for the rising flue gas, and better playing a role in blocking the overflow of the flue gas.

[0038] In some embodiments of the present invention, there is also a left-right symmetric exhaust air path. The air inlet is provided on the top wall 220. The incoming air passes through the electric control heat dissipation end, and after being pressurized by the fan, it is discharged from the air outlet 211. A guiding member is provided at the air outlet 211, and this guiding member is used to make the exhaust air in each place have the same air outlet direction. As Figure 3 shown, a fan box 100 for installing a volute 600 is provided at the upper part of the housing 200 of the range hood. A smoking fan 500 is installed in the volute 600. An installation chamber is formed in the fan box 100. The housing 200 is connected to the smoke collecting hood 210 below. An electric control box 300 is installed at the top of the fan box 100, and an exposed radiator 310 is provided on the electric control box 300 to dissipate heat from the power devices of the motor driving the smoking fan 500. An air inlet is provided at the position where the electric control box 300 is installed at the top of the fan box 100. An independent air guiding chamber is provided from the air inlet to the air outlet 211 to be isolated from the volute 600 to avoid interference with the incoming air of the smoking fan 500. The radiator 310 is arranged on the incoming air path close to the air inlet, so that the cold air at the air inlet first exchanges heat with the radiator 310 and is discharged from the air outlet 211 in the incoming air guiding chamber, thereby achieving good heat exchange for the radiator 310. The air outlets 211 are symmetrically distributed on both sides of the third guiding surface 224 relative to the center line of the smoke collecting hood 210. A guiding member is provided at the air outlets 211 to make the air outlet direction vertically downward. For example, the guiding member can specifically be a honeycomb-shaped guiding net 241, and the guiding net 241 forms a certain thickness in the vertically downward direction, thereby playing a guiding role for the air outlet.

[0039] In some embodiments of the present invention, the fan is an axial flow fan 243 provided near the non-air supply area, blowing from one end air outlet of the air outlet 211 to the other end of the air outlet 211. An exhaust air chamber 110 is formed on the air outlet 211. When the two fans exhaust air, high-speed air supply areas are formed on both sides. As Figure 4 and Figure 7As shown, exhaust chambers 110 formed by a housing 200 are provided on both upper sides of a smoke collecting hood 210. The exhaust chambers 110 are arranged in a long strip shape. An exhaust assembly 240 is provided in the exhaust chambers 110, including a guiding net 241, a pressing plate 242, etc. An axial flow fan 243 is arranged at one end of the exhaust chamber 110 close to the non-air supply area. The length of the exhaust chamber 110 is the same as the length of the air outlet 211. A long strip-shaped guiding net 241 is provided at the lower part of the exhaust chamber 110, which has a certain thickness to form an air outlet guiding effect. A pressing plate 242 is further provided above the guiding net 241 to fix the guiding net 241 to the pressing plate 242 and the outer wall surface of the smoke collecting hood 210. The axial flow fan 243 is fixed between the housing 200 and the pressing plate 242. A long strip-shaped air inlet is formed on the pressing plate 242. The horizontally blown air from the axial flow fan 243 forms a vertically downward air supply in the exhaust chamber 110 through the air inlet and the guiding net 241. It can be easily known from the air supply characteristics of the axial flow fan 243 that the air volume is large on the side of the air outlet 211 far from the axial flow fan 243, while the air volume is small at the position closer to the axial flow fan 243. Therefore, the air volume discharged from the strip-shaped air outlet 211 is inconsistent in size in its length direction, that is, the farther away from the non-air supply area in the middle, the larger the air volume, thereby reducing the interference of the air supply on the non-air supply area.

[0040] In some embodiments of the present invention, the housing 200 includes baffles 230 provided on both sides. The end faces of the baffles 230 are on both sides of the first guiding surface 221, and the projection of its side surface coincides with the first guiding surface 221. The baffles 230 are on both sides of the second guiding surface 223, and the projection of its side surface coincides with the second guiding surface 223 to define the air flow on both left and right sides; the two side baffles 230 extend downward at the projection of the third guiding surface 224. The two side baffles 230 form two side plates of the smoke collecting hood 210. The shapes of both ends of the stepped portion formed by the first guiding surface 221, the connecting section 222, and the second guiding surface 223 cooperate with the end faces of the baffles 230, so that the baffles 230 and the stepped portion achieve an overall appearance fit. And the lower end of the baffle 230 should extend beyond the lower end of the third guiding surface 224. The space of the extended part is used to install an oil sump 400, so that the appearance of the oil sump 400, the third guiding surface, and the two side plates is consistent as a whole.

[0041] The present invention also provides a range hood, such as Figures 1 to 7As shown, it includes a shell 200 forming a smoke hood 210 and a fan box 100 arranged at the upper end of the smoke hood 210 and equipped with a smoke exhaust fan 500, and the air guide component of the above-mentioned embodiment is arranged on the smoke hood 210, wherein a display unit 270 is also arranged on the inner side of the first guide surface 221, and the display unit 270 is provided with a display device and a button component, and the panel of the first guide surface 221 is transparent or translucent for the area of ​​the display device, so that the display of the display device is projected from the panel of the first guide surface 221, and a touch button component can also be arranged on the panel to control the operation of the smoke extractor. The inner wall of the smoke hood 210 is a concave third guide surface 224, and the baffles 230 on both sides form the side walls of the smoke hood 210. A first strip-shaped air inlet, i.e., the smoking port 212 in the above embodiment, is formed at more than 1 / 3 of the projection of the front elevation of the smoke hood 210. The first air inlet forms a negative pressure area located at the concave part, and the first air inlet is the smoking port 212 mentioned in the above embodiment. Since the air guide assembly is located at the protruding part of the upper part of the smoke hood 210, a downward vortex airflow is formed in this area, thereby forming a blocking area, and a negative pressure area of ​​the smoking area is formed between the blocking area and the inner wall of the smoke hood 210. When the user is cooking, the smoke generated by the stove installed under the range hood is sucked up by the negative pressure zone and enters the first air intake port, and a part of the smoke continues to rise to the area above the first air intake port in the smoke hood 210. Due to the obstruction of the vortex airflow and the vertical downward airflow from the exhaust port 211, the smoke will not overflow to the outside of the smoke hood 210, but will temporarily gather in the area above the negative pressure zone and then be sucked up by the first air intake port, thereby effectively improving the smoke extraction efficiency.

[0042] In some embodiments of the present invention, the concave third guide surface 224 extends downward, and a second air inlet 213 is formed at the lower end of the front elevation, and the second air inlet 213 includes a receiving section that exceeds the third guide surface 224, and the receiving section and the lower end of the third guide surface 224 form a circuitous air inlet duct. The second air inlet 213 is located at the lower end portion of the third guide surface 224 extending downward, and the air inlet duct is also connected to the first air inlet, and the second air inlet 213 can further absorb the smoke generated in the cookware when it diffuses to a lower position, thereby further improving the efficiency of smoking.

[0043] In some embodiments of the present invention, the outer end faces of the two baffles 230 are fitted with the two ends of the first air guiding surface 221 and the second air guiding surface 223 of the air guiding assembly in the above embodiments, and the outer end faces are inclined inwards from top to bottom. The end face at the lower end of the baffle 230 is horizontally arranged, so as to form a smoke collecting hood 210 with an upper protrusion and gradually concave inwards from top to bottom with the third air guiding surface 224. The air guiding assembly is arranged at the upper protruding position. Thus, when the range hood is working, a downward pressing vortex air flow is formed at the protruding position. A negative pressure area for smoking is formed between the vortex air flow and the concave wall surface of the third air guiding surface 224. And a blocking area for the flue gas is formed through the vortex air flow and the air supply vertically downward from the air outlet 211, preventing the upward flue gas from overflowing. By providing a range hood with a smoke collecting hood 210 whose opening faces the user side in the above shape, compared with the traditional range hood with a smoke collecting hood 210 whose opening faces downward, it will not block the user's line of sight towards the cookware, which is convenient for the user to use. Moreover, the upward flue gas is blocked by the downward pressing vortex air flow of the air guiding assembly and the air supply vertically downward from the air outlet 211, avoiding the upward flue gas from overflowing through the opening area facing the user. In this way, the smoking efficiency of the range hood is improved.

[0044] The present invention provides an air duct assembly for a range hood, as Figures 1 to 5 , Figures 8 to 9 shown, which includes a top wall 220, a surrounding plate 250 and a front panel 214. The top wall 220, the surrounding plate 250 and the front panel 214 jointly enclose an air duct section. An air outlet 211 and an axial flow fan 243 arranged on one side of the air outlet 211 are provided on the front panel 214. The air outlet 211 is arranged at one end of the air duct section. The air flow enters from the other end of the air duct section, passes through the inner cavity of the air duct section, and is discharged from the air outlet 211 after being pressurized by the axial flow fan 243. The front panel 214 forms the smoke collecting hood 210 of the range hood. Since the air inlet of the air duct section is arranged at the position where the top wall 220 is located, that is, at the high position of the installation of the range hood, the air inhaled from the top wall 220 is the air without mixed oil fume at the high position in the kitchen space. Thus, a relatively clean fresh air enters the air duct section and is discharged downward from the front air outlet 211. By forming a downward fresh air supply, a fresh air area is formed below the outside of the smoke collecting hood 210, which effectively blocks the overflow of the upward flue gas in the smoke collecting hood 210. Moreover, a negative pressure area is formed outside the fresh air area, thereby attracting more external air flow to enter the flue gas space where the smoke collecting hood 210 is located from the lower part of the smoke collecting hood 210, forming a pushing effect on the flue gas, which helps more flue gas to enter the smoke inlet in the smoke collecting hood 210, thereby improving the smoking efficiency of the range hood.

[0045] In some embodiments of the present invention, the air duct section includes a narrow air duct section 262 formed by the close proximity of the vertical surface of the surrounding plate 250 and the top wall 220, an air inlet section 261 located upstream of the narrow air duct section 262, and an expansion section 263 located downstream of the narrow air duct section 262 and surrounded by the front panel 214, the horizontal section of the top wall 220, and the surrounding plate 250. As Figure 9 shown, the front panel 214 forms the smoke collecting hood 210 of the range hood. At the upper end of the smoke collecting hood 210, there is a blower box 100 for installing the blower of the range hood. Its outer shell is formed by the top wall 220. A narrow air duct section 262 is formed on the vertical surface of the top wall 220. The narrow air duct section 262 is arranged around the blower box 100, so that the volume of the blower box 100 does not increase too much due to the setting of the narrow air duct section 262. Since the blower box 100 is located at the top of the range hood during installation and generally needs to be adapted to other furniture, the installation space in this part is narrow. Therefore, it is convenient for the installation of the blower box 100. The expansion section 263 is surrounded by the front panel 214, the horizontal section at the top, and the surrounding plate 250 inside the smoke collecting hood 210. It extends horizontally on both sides above the smoke collecting hood 210, thereby forming a uniform air flow collection cavity, which helps the fresh air sent from the air outlet 211 to form a large-area air curtain in the horizontal direction and better plays the role of blocking the smoke in the smoke collecting hood 210.

[0046] In some embodiments of the present invention, as Figure 10 shown, the horizontal cross-section of the narrow air duct section 262 is U-shaped. The inner wall surface of the narrow air duct section 262 has a spacing of 5 to 40 mm between the horizontals. The ratio of the perimeter in the horizontal direction of the narrow air duct section 262 to the spacing is 20 to 60. Among them, the narrow air duct section 262 is distributed on the front and both sides of the blower box 100, thereby forming a U-shaped horizontal cross-section. Its air inlet section 261 can be connected to both the front part and the side parts of the narrow air duct section 262 at the same time, so that the horizontal cross-section of its air inlet section 261 is also U-shaped; or the air inlet section 261 is only connected to one or two sides. For example, due to structural limitations, the air inlet section 261 is only arranged at the top of both sides of the blower box 100, so that it is only connected to the side parts of the narrow air duct section 262, or the air inlet section 261 is only arranged at the top of one side of the blower box 100 or only arranged at the top of the front. By setting the horizontal cross-section of the narrow air duct section 262 as U-shaped, it is convenient for the flexible structure of the air inlet section 261, because the position where the air inlet section 261 is located may interfere with other structures, so its setting structure is restricted. As in Figure 8 the structure shown, the electronic control box 300 is arranged at the top of the front of the blower box 100. Therefore, its air inlet section 261 is mainly distributed at the top of both sides of the blower box 100.

[0047] In some embodiments of the present invention, a necking is provided at the connection between the narrow air duct section 262 and the expansion section 263, and the free section of the necking extends towards the center of the narrow air duct section 262. As Figure 7As shown, at the connection position between the narrow air duct section 262 and the expansion section on the front part of the top wall 220, a part of the top wall 220 extends inward towards the center of the narrow air duct, causing the air flow passage at the end of the narrow air duct to become smaller and form a constriction. In this way, when the air flow in the narrow air duct passes through this constriction, its flow velocity increases and is discharged into the expansion section 263, which can increase the air flow density in the expansion section 263, form a relatively large air pressure, and contribute to the increase in the discharge speed of the air flow at the air discharge port 211 of the expansion section 263. Thus, an air curtain with a high air flow velocity is formed, which can better block the flue gas.

[0048] In some embodiments of the present invention, the air discharge port 211 is arranged on the horizontal plane section or the inclined plane section of the front panel 214. The included angle between the inclined plane section and the vertical plane is 71.5 degrees to 95.5 degrees. A guiding member is arranged at the air discharge port 211 so that the air supply direction of the air discharge port 211 has a downward component. Specifically, the guiding member can be a honeycomb-shaped guiding net 241. The guiding net 241 forms a certain thickness in the vertically downward direction to play a guiding role in air outlet. If the air discharge port 211 is arranged at the horizontal plane end of the front panel 214, the air flow discharged from the air discharge port 211 is vertically downward; if it is arranged at the inclined section, since the inclined section inclines towards the inner side of the smoke collecting hood 210, the air flow direction sent out by the air discharge port 211 inclines towards the outer side of the smoke collecting hood 210. By setting the included angle between the inclined plane section and the vertical plane to an appropriate angle, the degree of the air flow at the air discharge port 211 inclining outward is formed. The outward-inclined exhaust air flow can expand the volume of the smoke gathering area in the smoke collecting hood 210, thereby attracting more flue gas into the smoke intake port 212 of the smoke collecting hood 210.

[0049] In some embodiments of the present invention, the guiding member is provided with a rotating shaft (not shown in the figure) so that the air guiding direction of the guiding member has a first air supply direction and a second air supply direction. Compared with the fixed air guiding of the guiding member in the previous embodiment, a controllable rotating shaft is added to the guiding member in this embodiment. The rotating shaft is linked with the air guiding blades in the guiding member, so that the air flow supply direction of the guiding member can be changed, which is convenient for users to adjust a suitable air supply angle according to personal needs during use.

[0050] In some embodiments of the present invention, an electric control device is provided in the air inlet section 261. The electric control device is provided with an exposed radiator 310. There are heat dissipation fins (not shown in the figure) on the radiator 310. The air in the air inlet section 261 flows towards the heat dissipation fins 311 and absorbs heat. The electric control rotating shaft may include an electric control box 300 assembly. A control circuit board for driving the fan of the range hood to work is provided in the electric control box 300. Power devices are provided on its electric control board to control the rotation speed of the fan of the range hood. To facilitate the heat dissipation of the power devices, a metal radiator 310 is also provided in the electric control box 300 to dissipate heat from the power devices. The metal radiator 310, such as an aluminum radiator 310, is distributed with heat dissipation fins to increase the heat dissipation area. The radiator 310 is exposed from the electric control box 300. As Figure 9 shown, the radiator 310 is arranged in the air inlet section 261. When the air flow in the air inlet section 261 passes by, it first exchanges heat with the radiator 310, then enters the expansion section 263 through the narrow air duct section 262, and finally is discharged from the air outlet 211. Since the air inlet section 261 is located at the top of the range hood, far away from the cooking stove and the smoke collecting hood 210, the air temperature in this area is relatively low. Therefore, the air flow in the air inlet section 261 can effectively reduce the temperature of the radiator 310, so that the temperature of the power devices is maintained normal, ensuring the reliability of the operation of the range hood.

[0051] The present invention also proposes a range hood, such as Figures 1 to 5 、 Figures 8 to 9As shown in the figure, it includes a housing 200 forming a smoke collecting hood 210 and a blower box 100 provided at the upper end of the smoke collecting hood 210 for installing a smoking fan 500. The air duct assembly mentioned in the above embodiment is provided in the housing 200 of the range hood and the blower box 100. Inside the first guide surface 221, a display part 270 is further provided. The display part 270 is provided with a display device and a button component. The panel of the first guide surface 221 is transparent or semi-transparent in the area for the display device, so that the display of the display device projects out from the panel of the first guide surface 221, and a touch button component can also be provided on this panel to control the operation of the range hood. The inner wall surface of the smoke collecting hood 210 is an inwardly concave third guide surface 224. The baffles 230 on both sides form the side walls of the smoke collecting hood 210. A strip-shaped first air suction port, that is, the smoke suction port 212 in the above embodiment, is formed in more than 1 / 3 of the projection of the front elevation of the smoke collecting hood 210. The first air suction port forms a negative pressure area at the concave part. The first air suction port is the smoke suction port 212 mentioned in the above embodiment. Since the air guide assembly is located at the protruding part above the smoke collecting hood 210, a downward pressing vortex air flow is formed in this area to form a blocking area, and a negative pressure area of the smoking area is formed between the blocking area and the inner wall surface of the smoke collecting hood 210. When the user is cooking, the fumes generated by the cooking appliance installed below the range hood are attracted by the negative pressure area and rise, entering the first air suction port. And a part of the above-mentioned fumes continues to rise to the area above the first air suction port in the smoke collecting hood 210. Due to the blocking of the vortex air flow and the air flow vertically downward from the air discharge port 211, it will not overflow outside the smoke collecting hood 210, but is temporarily gathered in the area above the negative pressure area, and then is sucked by the first air suction port, thus effectively improving the smoking efficiency.

[0052] In some embodiments of the present invention, the inwardly concave third guide surface 224 extends downward, and a second air suction port 213 is further formed at the lower end of the front elevation. The second air suction port 213 includes a receiving section that extends beyond the third guide surface 224. The receiving section and the lower end of the third guide surface 224 form a circuitous air inlet duct section. The second air suction port 213 is located at the lower end of the downward extension of the third guide surface 224. The air inlet duct is also communicated with the first air suction port. Through the second air suction port 213, the absorption of the fumes generated in the cookware when diffusing to a lower position can be further enhanced, thereby further improving the smoking efficiency.

[0053] In some embodiments of the present invention, the outer end faces of the two baffles 230 cooperate with the two ends of the first air guiding surface 221 and the second air guiding surface 223 of the air guiding assembly in the above embodiments, and the outer end faces are inclined inwards from top to bottom. The end face at the lower end of the baffle 230 is horizontally arranged, so as to form a smoke collecting hood 210 with an upper protrusion and gradually concave inwards from top to bottom with the third air guiding surface 224. The air guiding assembly is arranged at the upper protruding position. Thus, when the range hood is working, a downward pressing vortex air flow is formed at the protruding position. A negative pressure area for smoking is formed between the vortex air flow and the concave wall surface of the third air guiding surface 224, and a blocking area for the flue gas is formed through the vortex air flow and the air supply vertically downward from the air outlet 211, preventing the overflow of the rising flue gas. By providing a range hood with a smoke collecting hood 210 whose opening faces the user side in the above shape, compared with a traditional range hood with a downward opening smoke collecting hood 210, it does not block the user's line of sight towards the cookware, which is convenient for the user to use. Moreover, the downward pressing vortex air flow of the air guiding assembly and the air supply vertically downward from the air outlet 211 form a block for the rising flue gas, avoiding the overflow of the rising flue gas through the opening area facing the user, thereby improving the smoking efficiency of the range hood.

[0054] The present invention provides a display assembly, such as Figure 1 , Figure 11 and Figure 12As shown, the display component 700 can be installed on an electrical device, such as a household appliance like a range hood, for displaying operating status information. The display component 700 includes a glass display panel 710 and also includes an electronic control component 720. The electronic control component 720 includes a touch control part 721 that abuts against the inner wall of the glass display panel 710, and a display unit 722 that is attached to the inner wall of the glass display panel 710. The electronic control component 720 includes a PCB board, and a connecting wire with a connector is connected to the PCB board (not shown in the figure); the display component 700 also includes a detachable connection part, which is arranged on the inner wall surface of the glass display panel 710 and is fixed by applying a force towards the inner wall surface. In this embodiment, the display component 700 is first fixed to the glass display panel 710, and then the glass display panel 710 is fixed to the electrical device through the detachable connection part. Taking the electrical device as a range hood as an example, the glass display panel 710 is long strip-shaped, and the length of the electronic control component 720 is relatively shorter than that of the glass display panel 710. For example, it is arranged at the middle position of the glass display panel 710, and its length is about 1 / 3 of the glass display panel 710. The electronic control component 720 is provided with a touch control part 721 and a display unit 722, so that display and button functions can be performed through the glass display panel 710. Since the electronic control component 720 needs to be closely attached and fixed to the glass display panel 710 to meet the requirements of the display state and touch sensitivity, and the outer surface of the glass display panel 710 generally does not have through holes on the surface to fix the glass panel with fixing parts such as screws to meet the appearance requirements. In order to stably and reliably fix such a long strip-shaped glass display panel 710 on the housing of the range hood and achieve good display and touch button functions, the electronic control component 720 is first fixed to the inner side of the glass display panel 710 so that the electronic control component 720 is closely attached to the glass display panel 710, and then it is fixed to the housing of the range hood through the detachable connection part arranged on the inner side of the glass display panel 710. In this way, the detachable of the glass display panel 710 relative to the housing can be realized, which is convenient for the later maintenance of the electronic control component 720, and the electronic control group realizes the display and touch button functions on the surface of the glass display panel 710. If the electronic control component 720 is first fixed to the housing and then the glass display panel 710 is fixed to the electronic control component 720, since it is difficult to closely attach the long strip-shaped glass display panel 710 to the two, unless a plurality of screw holes are provided on the surface of the glass display panel 710, which will significantly reduce the overall appearance of the entire glass display panel 710.

[0055] Therefore, in the display component 700 according to the embodiment of the present invention, the electric control component 720 including the touch control part 721 and the display unit 722 is first fixed to the inner wall of the glass display panel 710, and a detachable connection part is arranged on the inner wall surface of the glass display panel 710, so that the electric control component 720 is tightly attached and fixed to the glass display panel 710, thereby realizing stable and reliable display and touch control button functions on the outer surface of the glass display panel 710, and realizing detachable fixation of the glass display panel 710 to the electrical equipment through the detachable connection part, facilitating the maintenance of the electric control component 720 in the later stage, and this solution does not require a fixed through hole to be opened in the glass display panel 710, thus ensuring the overall consistency of the outer surface of the glass display panel 710 and improving its appearance beauty.

[0056] In some embodiments of the present invention, such as Figure 11 and Figure 12 shown, the glass display panel 710 is strip-shaped, the electric control component 720 is arranged in the middle of the glass display panel 710, and at least one detachable connection part is arranged on each side of the electric control component 720. The electric control component 720 includes a cover body 723 which covers the electric control component 720, and the touch control part 721 is made of an elastic and electrically conductive material. In this embodiment, the glass display panel 710 is strip-shaped, the electric control component 720 is installed on the back of the glass display panel 710, approximately occupying 1 / 3 of the length of the glass display panel 710. The display unit 722 of the electric control component 720 can be arranged in the middle position of the electric control component 720, and the touch control part 721 is distributed on both sides of the display unit 722. The touch control part 721 can be a component made of an electrically conductive material such as a conductive spring or a conductive sponge. One end of it abuts against the back of the glass panel, and the other end is electrically connected to the touch detection line corresponding to the PCB of the touch control part 721, and the touch detection line is then connected to the corresponding touch detection circuit. A silk screen of a button is arranged at the position of the touch control part 721 on the front surface of the glass panel, which can indicate the name lamp of the button, so as to realize that when a finger touches the front surface of the glass display panel 710, the induction signal of the finger is detected by the touch detection circuit through the conduction of the touch control part 721. The cover body 723 covers the back of the electric control component 720. On the one hand, it plays a role in protecting the electric control component 720 from being damaged by being touched by foreign objects during installation. On the other hand, it can also be fixed to the back of the glass display panel 710 through the cover body 723 to form an installation chamber, so as to install the electric control component 720 in this installation chamber. Specifically, as Figure 12 shown, an installation post 730 is fixed on the back of the glass display panel 710, and a through hole is arranged thereon. A through hole is arranged on the cover body 723, so that the cover body 723 is fixed to the glass display panel 710 through a fixing member such as a screw passing through the through hole and the through hole. At least one detachable connection part is arranged on both sides of the electric control component 720, so that Figure 12As shown, since the glass display panel 710 is relatively long, in order to reliably fix the glass display panel 710 to the housing 200, two detachable connection parts are provided on each side of the electronic control component 720.

[0057] In some embodiments of the present invention, the display unit 722 includes at least one lighting unit for illuminating the glass display panel 710; the lighting unit is a display screen, and the pattern is displayed through the glass display panel 710 by displaying the pattern on the display screen; or the lighting unit is an LED lamp, and a pattern is provided at the position corresponding to the LED lamp, and the pattern is provided on the inner side or the outer side of the glass display panel 710. As Figure 11 and Figure 12 shown, the display unit 722 is an LED digital display screen, and the display glass panel is made of a translucent material. The body of the LED digital tube cannot be seen from the front, but when the LED digital tube is lit, the light it emits passes through the glass display panel 710 and is thus observed by the user. Further, a key indicator light is also provided at the position of the touch part 721, and a silk screen is provided at the corresponding position on the front surface of the glass display panel 710. When a finger touches a key such as the power-on key to turn on the machine, the key indicator light of the power-on key is lit, so as to better prompt the user that the machine is currently in the power-on state. When the power-on key is touched again, the key indicator light goes out, thus facilitating the user's touch operation.

[0058] In some embodiments of the present invention, the connection line with a connector has a redundant portion (not shown in the figure). When the display component 700 is removed and pulled out, the redundant portion is straightened so that the connector can be pulled out. The display component 700 has a base portion, which is fixed to the inner side of the glass display panel 710. The PCB board is fixed on the base portion, and the cover body 723 is fixed on the base portion. In this embodiment, one end of the connection line is electrically connected to the display component 700, and the other end is electrically connected to the main control board of a device such as a range hood. In this way, the processor of the main control board can obtain the touch button signal of the display component 700, and the display component 700 that transmits the display signal controls the display unit 722 to display. Since the glass display panel 710 is detachable from the housing, for the convenience of installation and maintenance, its connection line can be provided with a redundant portion for buffering, so that after the glass display panel 710 is disassembled, its connection to the main control board retains a certain buffer, without affecting the disassembly. Further, a detachable connection terminal can be provided in the middle of the connection line. In this way, after the glass display panel 710 is disassembled, the connection terminal is disassembled to completely separate the glass display panel 710 from the housing. The display unit 722 is fixed and electrically connected to the PCB board to form a display circuit board. The display circuit board is then fixed to the base portion, and then the base portion is fixed to the inner side (i.e., the back) of the glass display panel 710. The fixing method can be, for example, the scheme of setting fixing posts on the glass display panel 710 as mentioned in the above embodiments, and then fixing it through the through holes on the cover body 723 by fixing parts; or the base portion is adhesively bonded to the back of the glass display panel 710 with strong glue, and then the cover body 723 is fixed on the base portion, and the cover body 723 is further fixed to the glass display panel 710. In this way, the display unit 722 is closely attached to the back of the glass display panel 710 by bonding, which helps to improve the light transmission of the display unit 722 and the sensitivity of touch button detection.

[0059] In some embodiments of the present invention, such as Figures 2 to 7 , Figure 11 and Figure 12 shown, the detachable connection portion includes a clamping member and a connection hole to be connected 281, wherein the clamping member is fixed to the glass panel, and the connection hole to be connected 281 is provided on the housing of the electrical device. The clamping member has elastic claws 740. When the elastic claws 740 are not stressed, the elastic claws 740 extend, and the connection hole to be connected 281 and the pulling force receiving section 742 define the movement of the glass display panel 710 in the direction perpendicular to the glass display panel 710. The elastic claws 740 have a pressing force receiving section 741. When the display component 700 is pressed towards the connection hole to be connected 281, the pressing force receiving section 741 is stressed, causing the elastic claws 740 to deform towards the center, so that the elastic claws 740 enter the connection hole to be connected 281. The elastic claws 740 have a pulling force receiving section 742. When the display component 700 is pulled away from the connection hole to be connected 281, the pulling force receiving section 742 is stressed, causing the elastic claws 740 to deform towards the center, so that the elastic claws 740 move out of the connection hole to be connected 281. Specifically, asFigure 4 , Figure 7 and Figure 12 As shown in Figure 4 , Figure 7 and Figure 12 , when the elastic claw 740 is not installed in the connection hole 281 to be connected, it has a petal-shaped deformation part that expands around. The petal-shaped deformation part forms a pressure receiving force section 741, and the petal-shaped deformation part extends and tapers towards the bottom of the elastic claw 740 to form a tension receiving force section 742. The pressure receiving force section 741 is connected to the tension receiving force section 742 at the bottom of the elastic claw 740. When the pressure receiving force section 741 is in the uninstalled state, the cross-sectional area at the maximum in the length direction is larger than the aperture of the connection hole 281 to be connected, such as 2 to 3 times the aperture of the connection hole 281. Thus, when the pressure receiving force section 741 is snapped into the connection hole 281 to be connected, its deformation part generates a bending deformation and extends into the connection hole 281 from the connection hole 281. And the maximum cross-sectional area in the length direction of the tension receiving force section 742 is slightly larger than the aperture of the connection hole 281 to be connected. The tension receiving force section 742 is snap-fitted in the connection hole 281 to form an interference fit, thereby being reliably fixed in the connection hole 281, so as to realize the reliable fixation of the glass panel on the housing.

[0060] Specifically, as shown in Figure 4 and Figure 7 , the pressure receiving force section 741 includes 2 to 6 elastic claws 740. The elastic claws 740 are evenly and symmetrically distributed around the central position, and the fixed ends of the elastic claws 740 are fixedly connected to the glass display panel 710. The elastic claws 740 are arc-shaped, and there are odd points in the middle from the fixed end to the free end. At the odd points of each elastic claw 740, the area surrounded by the outer wall surface is the largest; and this area is larger than the aperture of the connection hole 281 to be connected; the area surrounded by the outer wall surface at the fixed end is smaller than the area of the connection hole 281 to be connected; the area surrounded by the outer wall surface at the free end is smaller than the area of the connection hole 281 to be connected. This odd point is the connection part between the pressure receiving force section 741 and the tension receiving force section 742. Thus, when the elastic claw 740 contacts the wall surface of the connection hole 281 at the odd point, its petal-shaped deformation part is in or close to the natural expanded state around when not installed, so as to be reliably fixed in the connection hole 281 in the up and down direction.

[0061] In some embodiments of the present invention, as shown in Figure 12 , the detachable connection part includes a fixed connection member 743. The fixed connection member 743 is adhesively bonded to the back surface of the glass display panel 710, and the fixed connection member 743 is integrally connected to the snap connection member. The fixed connection member 743 has a planar connection piece, and the connection piece is connected to the tension receiving force section 742 of the snap connection member. The area of the connection piece can be larger than the maximum cross-sectional area in the length direction of the receiving force section. The connection piece is adhesively bonded to the back surface of the glass display panel 710 through a strong adhesive such as double-sided tape, so as to fix the snap connection member on the glass display panel 710. Or in another embodiment, the fixed connection member 743 and the snap connection member are connected through a fastener.

[0062] ​​​​​​The present invention also provides a range hood, as Figures 2 to 7 , Figure 11 and Figure 12 shown, which includes a panel sheet metal part 280, and also includes the display component 700 mentioned in the above embodiments. The display component 700 is installed on the panel sheet metal part 280. The panel sheet metal part 280 has an adaptively connected surface adapted to the inner wall surface of the glass display panel 710, which includes a mounting hole 283 for the electric control component 720 to pass through and be accommodated in the hole, and a connection hole to be connected 281 for clamping by a clamping part, so that the glass display panel 710 is fixed on the panel sheet metal part 280. The panel sheet metal part 280 is used as a part of the housing, and the housing forms a smoke collecting hood. A blower box 100 of a smoke extraction fan 500 is installed at the upper end of the smoke collecting hood. A volute 600 is installed in the blower box 100. An installation chamber is formed in the blower box 100. The housing 200 is connected to the lower smoke collecting hood 210. An electric control box 300 is installed at the top of the blower box 100, and the electric control box 300 is provided with an exposed radiator 310 to dissipate heat from the power devices of the motor driving the smoke extraction fan 500.

[0063] In some embodiments of the present invention, as Figure 11 shown, the aperture range of the connection hole to be connected 281 is 10 to 18 mm. The adaptively connected surface has a recessed part 282 adapted to the shape of the fixed connecting part 743. The area of the recessed part 282 is adapted to the area of the connecting piece of the fixed connecting part 743. The connection hole to be connected 281 is arranged in the central area of the recessed part 282. When the connection hole to be connected 281 and the pulling receiving force section 742 define the glass display panel 710, the top of the fixed connecting part 743 abuts against the top surface of the recessed part 282. Since the connecting piece has a certain thickness, when the connection hole to be connected 281 and the pulling receiving force section 742 define the glass display panel 710, the top of the fixed connecting part 743, that is, the connecting piece, is accommodated in the recessed part 282, so as not to protrude from the back surface of the glass display panel 710 to form interference, and the display component 700 is arranged in a fitting manner on the back surface of the glass display panel 710.

[0064] In some embodiments of the present invention, it further includes a main control board (not shown in the figure). The main control board is electrically connected with a docking head, and the docking head is detachably electrically connected with the main control board. One end of the docking head is connected with a connecting wire, and the other end of the connecting wire is connected with the display component 700. In this way, the detachable electrical connection between the display component 700 and the main control board is realized; or in another feasible solution, both ends of the connecting wire are fixedly electrically connected with the display board and the main control board, and a docking head is arranged at the middle position of the connecting wire, and the detachable electrical connection between the main control board and the display board is also realized.

[0065] Furthermore, two sealing parts are screwed on both sides of the panel sheet metal part 280 by screws to cover the gaps on both sides of the panel sheet metal part 280. In this way, the overall consistency between the panel sheet metal part 280 and the glass display panel 710 is realized.

[0066] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0067] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0068] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0069] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, unless otherwise clearly specified or limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate medium. Further, a first feature being "above", "over" and "on top of" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being "under", "below" and "beneath" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An air guiding assembly for a range hood, characterized in that, The invention comprises a shell having a top wall and an air outlet arranged on the top wall. The upper front part of the shell is provided with a first guide surface and an inclined second guide surface, a connecting section is provided between the two guide surfaces in the horizontal direction, a third guide surface is extended rearward from the second guide surface, wherein the angle between the second guide surface and the horizontal direction is smaller than the angle between the third guide surface and the horizontal direction, and the angle between the first guide surface and the horizontal plane ranges from 91 degrees to 131 degrees; The first guide surface is planar, and its free end extending downward exceeds the connecting section, and the inner surface of the exceeding part forms a first vortex zone with the connecting section and the second guide surface; the second guide surface is connected to the third guide surface, wherein the free end of the second guide surface extending downward exceeds the connection with the third guide surface, and the inner surface of the exceeding part forms a second vortex zone with the third guide surface.

2. The air flow guiding assembly according to claim 1, wherein, The length of the connecting section is n times the length of the first guide surface, where n ranges from 0.3 to 0.6; the distance between the connecting section and the top wall is H, the length of the connecting section is L, and the ratio of L to H ranges from 0.3 to 0.

5.

3. The air flow guiding assembly according to claim 1, characterized in that, Long strip-shaped air outlets are arranged on the left and right sides of the third guide surface, and the air outlets are arranged parallel to the first guide surface. The non-air supply area is between the air outlets on the left and right sides of the third guide surface; the high-speed downward air outlet of the air outlet forms a negative pressure drainage area, so that the airflow entering the third guide surface is downward along the downward air outlet.

4. The air guiding assembly according to claim 3, wherein It also includes a bilaterally symmetrical exhaust air path, with an air inlet arranged on the top wall. The incoming air passes through the electrically controlled heat dissipation end and is pressurized by the fan before being discharged from the exhaust port. A guide member is arranged at the exhaust port, and the guide member is used to ensure that the exhaust air at each location has the same outlet direction.

5. The air flow guiding assembly according to claim 4, wherein, The fan is an axial flow fan and is arranged near the non-air supply area. It blows air from the outlet at one end of the exhaust port to the other end of the exhaust port. An exhaust cavity is formed on the exhaust port. When the two fans exhaust air, high air supply speed areas are formed on both sides.

6. The air flow guiding assembly according to claim 5, characterized in that, The shell includes baffles arranged on both sides, the end faces of the baffles are on both sides of the first guide surface, and the projection of the side of the baffle is consistent with the first guide surface, the baffles are on both sides of the second guide surface, and the projection of the side is consistent with the second guide surface, so as to limit the airflow on the left and right sides; the baffle extends downward at the projection of the third guide surface.

7. A smoking machine, characterized in that, The invention comprises an air guide assembly as claimed in any one of claims 1 to 6, wherein the shell forms a smoke collecting hood, the inner wall surface of the smoke collecting hood is a concave third guide surface, the projection of the front elevation thereof forms a first strip-shaped air inlet over 1 / 3, and the first air inlet forms a negative pressure area located at the concave part.

8. The range hood according to claim 7, characterized in that, The concave third guide surface extends downward, and a second air suction port is formed at the lower end of the front facade. The second air suction port includes a receiving section that exceeds the third guide surface, and the receiving section and the lower end of the third guide surface form a circuitous air inlet duct portion.

9. The range hood according to claim 8, characterized in that, The lower end of the baffle in the air diversion assembly extends downward corresponding to the projection on the side of the second air suction port, and the lower end of the baffle is horizontally arranged. The side of the baffle forms an inclined extension from the outside to the inside and is connected to the horizontally arranged lower end.

Images