Air inlet device and range hood

Abstract

The utility model provides an air inlet device and a range hood, and relates to the technical field of kitchen appliances, the air inlet device comprises a smoke collecting cavity and an air curtain generating assembly; the smoke collecting cavity is provided with an air inlet; the air curtain generating assembly is arranged on the rear side of the air inlet and can form wall-attached airflow on the surface of the smoke collecting cavity on the rear side of the air inlet. Due to the fact that wall-attached airflow flows along the surface of the smoke collecting cavity on the rear side of the air inlet in a wall-attached mode, the wall-attached airflow is not prone to being captured by the air inlet under the action of negative pressure of the air inlet, and partition flowing of the wall-attached airflow and airflow at the air inlet is achieved. Due to the fact that the airflow adhering to the wall and the airflow at the air inlet flow in the partitioned mode, the flowing area at the air inlet is distributed in a fan shape and moves forwards, and the smoke suction effect is improved. The smoking effect is improved through the wall-attached airflow on the rear side of the air inlet, the air volume does not need to be increased, noise can be lowered, and user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to an air intake device and a range hood. Background Art

[0002] A range hood is a kitchen appliance that absorbs cooking fumes. A centrifugal fan creates negative pressure at the smoke inlet, which absorbs the smoke.

[0003] In order to improve the smoking effect, a method of moving the flow area at the smoking port forward is usually adopted. In the prior art, the flow area at the smoking port is usually moved forward by increasing the air volume.

[0004] However, increasing the air volume will increase the noise of the range hood and provide a poor user experience. Utility Model Content

[0005] The purpose of the utility model is to provide an air inlet device to solve the technical problem in the prior art of relying on increasing the air volume to achieve forward movement of the flow area at the smoking port.

[0006] The air inlet device provided by the utility model includes a smoke collecting chamber and an air curtain generating component;

[0007] The smoke collecting chamber is provided with an air inlet;

[0008] The wind curtain generating assembly is arranged at the rear side of the air inlet, and the wind curtain generating assembly can form a wall-adhering airflow on the surface of the smoke collecting cavity at the rear side of the air inlet.

[0009] Further, the smoke collecting chamber includes a first wall surface;

[0010] The air inlet and the wind curtain generating assembly are both arranged on the first wall surface, and the wind curtain generating assembly can form a wall-adhering airflow on the lower surface of the first wall surface.

[0011] Furthermore, the smoke collecting chamber includes a bottom wall and a flow guide;

[0012] The guide member and the bottom wall are sequentially arranged at the rear side of the air inlet; one end of the guide member is connected to the front edge of the bottom wall, and the other end of the guide member is inclined toward the top of the bottom wall;

[0013] The wind curtain generating assembly is arranged on the top of the air guide member, and the wind curtain generating assembly can form a wall-adhering airflow on the lower surface of the air guide member.

[0014] Furthermore, the air inlet device further includes an oil guide member;

[0015] The lower surface of the bottom wall is arranged in a horizontal direction;

[0016] The oil guide member is arranged above the bottom wall and the flow guide member, and the upper surface of the oil guide member is arranged to be inclined with respect to the horizontal plane.

[0017] Furthermore, the wind curtain generating assembly includes a wind curtain generating module and a wall attaching module;

[0018] The air curtain generating module is used to blow out air flow;

[0019] The lower surface of the wall-adhering module is a curved surface, and the airflow blown out by the wind curtain generating module can form a wall-adhering airflow on the lower surface of the wall-adhering module;

[0020] The airflow blown out by the wind curtain generating module is tangent to one end of the lower surface of the wall-attached module, and the other end of the lower surface of the wall-attached module is tangent to the surface of the smoke collecting cavity behind the air inlet.

[0021] Furthermore, the lower surface of the wall-attached module includes a first curved surface and a second curved surface connected to each other, the first curved surface is tangent to the second curved surface, and the first curved surface and the second curved surface have opposite convex directions;

[0022] One end of the first arc surface is tangent to the airflow blown out by the wind curtain generating module, and one end of the second arc surface is tangent to the surface of the smoke collecting cavity behind the air inlet.

[0023] Furthermore, the air outlet speed of the wind curtain generating module is V1, 1m / s<V1<3m / s;

[0024] The distance between the two ends of the wall-attached module is L1, L1 < 120 mm;

[0025] The wind curtain generating module includes an air outlet, and the distance between the top edge of the air outlet and the bottom edge of the air outlet is d1, and d1 is ≥5mm.

[0026] Furthermore, the distance between the two ends of the wall-attached module is L1, 3d1<L1<120mm.

[0027] Furthermore, the radius of the first arc surface is R1, the radius of the second arc surface is R2, and 0.4R1<R2.

[0028] The purpose of the present utility model is also to provide a range hood, including the air inlet device provided by the present utility model.

[0029] The air intake device provided by the present invention includes a smoke collecting chamber and an air curtain generating assembly; the smoke collecting chamber is provided with an air inlet; the air curtain generating assembly is arranged at the rear side of the air inlet, and the air curtain generating assembly can form a wall-adhering airflow on the surface of the smoke collecting chamber at the rear side of the air inlet. Since the wall-adhering airflow flows along the surface of the smoke collecting chamber at the rear side of the air inlet and adheres to the wall, under the action of the negative pressure of the air inlet, the wall-adhering airflow is not easily captured by the air inlet, thereby realizing the partitioned flow of the wall-adhering airflow and the airflow at the air inlet. Since the wall-adhering airflow and the airflow at the air inlet flow in partitioned ways, and the wall-adhering airflow is located at the rear side of the air inlet, the wall-adhering airflow occupies the flow area originally distributed in a semicircular shape at the air inlet, making the flow area at the air inlet fan-shaped, and at the same time making the flow area at the air inlet move to the front side, thereby improving the smoking effect. The air intake device provided by this embodiment improves the smoking effect by the wall-adhering airflow at the rear side of the air inlet, does not require increasing the air volume, can reduce noise, and improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a schematic structural diagram of the air inlet device provided by an embodiment of the present utility model;

[0032] Figure 2 This is a diagram showing the state of use of the air intake device provided by an embodiment of the present utility model;

[0033] Figure 3 This is a structural diagram of the air curtain generating assembly of the air inlet device provided by an embodiment of the present utility model;

[0034] Figure 4 This is a state diagram of the air flow blown out by the air curtain generating module of the air inlet device provided by an embodiment of the utility model being sucked back into the air inlet;

[0035] Figure 5 This is a diagram showing the dripping state of condensed oil in the air inlet device provided by an embodiment of the present utility model;

[0036] Figure 6 This is a diagram of a flat plate circular hole air intake model provided by an embodiment of the utility model;

[0037] Figure 7 This is a model diagram of the airflow wall effect provided by an embodiment of the present utility model;

[0038] Figure 8 Schematic diagram of the airflow wall effect provided by an embodiment of the present utility model;

[0039] Figure 9 This is a schematic diagram of the flow area at the air inlet provided by an embodiment of the present invention without the air curtain generating assembly;

[0040] Figure 10 This is a schematic diagram of the flow area at the air inlet where the air curtain generating assembly is provided in an embodiment of the present utility model;

[0041] Figure 11 This is a structural diagram of a fully embedded European-style range hood provided by an embodiment of the present utility model;

[0042] Figure 12 This is a structural diagram of a side-suction range hood provided by an embodiment of the present utility model;

[0043] Figure 13 It is a structural schematic diagram of a small-sized ultra-thin range hood provided by an embodiment of the utility model.

[0044] Icons: 1-decorative cover; 2-display panel; 3-flip glass; 4-wind curtain generating assembly; 41-wind curtain generating module; 411-top edge of air outlet; 412-bottom edge of air outlet; 42-wall-attached module; 421-first curved surface; 422-second curved surface; 5-bottom wall; 51-air inlet; 52-through hole; 6-oil cup; 7-flow guide; 71-connecting part; 8-oil guide; 81-fitting part; 9-wall-attached airflow; 10-oil smoke; 11-airflow blown out by the wind curtain generating module; 12-condensed oil; 13-flat plate; 14-round hole; 15-curved surface; 16-airflow; 17-first wall. DETAILED DESCRIPTION

[0045] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0046] The present invention provides an air intake device and a range hood. The air intake device and the range hood provided by the present invention are described in detail below with reference to a plurality of embodiments.

[0047] Example 1

[0048] The air inlet device provided in this embodiment is as follows: Figures 1 to 13 As shown, it includes a smoke collecting chamber and an air curtain generating assembly 4; the smoke collecting chamber is provided with an air inlet 51; the air curtain generating assembly 4 is arranged behind the air inlet 51, and the air curtain generating assembly 4 can form a wall-adhering airflow 9 on the surface of the smoke collecting chamber behind the air inlet 51.

[0049] Along the front-to-back direction, the wind curtain generating assembly 4 is arranged at the rear side of the air inlet 51 , and the wind curtain generating assembly 4 forms a wall-adhering airflow 9 on the surface of the smoke collecting chamber at the rear side of the air inlet 51 , and the wall-adhering airflow 9 flows toward the rear side of the air inlet 51 .

[0050] Since the wall-adhering airflow 9 flows along the surface of the smoke collecting chamber behind the air inlet 51, under the action of the negative pressure of the air inlet 51, the wall-adhering airflow 9 is not easily captured by the air inlet 51, thus realizing the partitioned flow of the wall-adhering airflow 9 and the airflow at the air inlet 51. Figures 9 and 10 As shown, due to the partitioned flow of the wall-adhering airflow 9 and the airflow at the air inlet 51, and the location of the wall-adhering airflow 9 behind the air inlet 51, the wall-adhering airflow 9 occupies the original semicircular flow area at the air inlet 51, giving the flow area at the air inlet 51 a fan-shaped distribution. This also shifts the flow area at the air inlet 51 forward, thereby improving the smoking effect. The air inlet device provided in this embodiment improves the smoking effect through the wall-adhering airflow 9 behind the air inlet 51, without increasing the air volume, reducing noise, and improving the user experience.

[0051] In addition, the wall-adhering airflow 9 flows through the surface of the smoke collecting chamber behind the air inlet 51 , which can isolate the adhesion of the oil smoke 10 and reduce the oil adhesion on the surface of the smoke collecting chamber behind the air inlet 51 .

[0052] The rear side of the air inlet 51 refers to the side of the air inlet 51 away from the front end surface of the smoke collecting chamber.

[0053] The principle of forward movement of the flow area is explained by taking the flat plate 13 and circular hole 14 as the air intake model. A circular hole 14 is opened on the flat plate 13, and a fan system is set above the circular hole 14. When the fan is turned on, a negative pressure is generated at the circular hole 14. Under the condition of uniform gas density, a negative pressure is generated around the circular hole 14. Figure 6 The velocity distribution cloud shown is a concentric semicircular velocity distribution. This is because under isothermal conditions, the gas density is consistent, and the forces acting on the gas in areas of equal radius are consistent, resulting in a flow area distribution similar to a concentric circle distribution.

[0054] If the semicircular flow distribution can be changed to a fan-shaped distribution, the flow area will move forward along the centerline of the fan according to the law of energy conservation, thus achieving forward movement of the flow area. Since the stove has two smoke sources, their positions are relatively fixed relative to the front and rear directions of the range hood. If the center of the fan-shaped flow area is aligned as closely as possible with the smoke source, the extraction effect can be improved.

[0055] Furthermore, the smoke collecting chamber includes a first wall 17 ; the air inlet 51 and the wind curtain generating assembly 4 are both arranged on the first wall 17 , and the wind curtain generating assembly 4 can form a wall-adhering airflow 9 on the lower surface of the first wall 17 .

[0056] The smoke collecting chamber includes a first wall surface 17 , an air inlet 51 is opened on the first wall surface 17 , and the wind curtain generating assembly 4 is arranged at the rear side of the air inlet 51 , and the wind curtain generating assembly 4 is fixed on the first wall surface 17 .

[0057] The air inlet device provided in this embodiment has high versatility and can be applied to various types of range hoods.

[0058] When the range hood is a fully embedded European style range hood, Figure 11 As shown, the first wall 17 is horizontally arranged. The first wall 17 is located at the bottom of the smoke collecting chamber. Along the front-to-back direction, the air curtain generating assembly 4 is arranged at the rear side of the air inlet 51.

[0059] When the range hood is a side suction range hood or a small-sized ultra-thin range hood, Figures 12 to 13 As shown, the first wall 17 is arranged at an inclination with respect to the horizontal plane. Along the front-to-back direction, the wind curtain generating assembly 4 is arranged behind the air inlet 51 , and along the vertical direction, the wind curtain generating assembly is arranged below the air inlet 51 .

[0060] When a small-sized ultra-thin range hood is applied with the air inlet device provided in this embodiment, the height can be reduced to 350 mm and the thickness can be reduced to 100 mm, which can effectively alleviate the problem of pot collision.

[0061] In order to make the air curtain component 4 play a better role, it is possible to match the back pressure of the range hood by setting sensors and software control. Take the range hood high-speed operation as an example:

[0062] When the back pressure of the rear pipe network is less than 300Pa, the air curtain generating assembly 4 operates at a low gear, so that the wall-adhering airflow 9 isolates the oil smoke and reduces the oil on the surface of the smoke collecting cavity behind the air inlet 51;

[0063] When the back pressure of the rear-end pipe network is ≥300Pa, the air curtain generating assembly 4 operates at a high level, and the flow area at the air inlet 51 is distributed in a fan shape, while the flow area at the air inlet 51 moves toward the front side.

[0064] Furthermore, the smoke collecting chamber includes a bottom wall 5 and a flow guide 7; the flow guide 7 and the bottom wall 5 are arranged in sequence on the rear side of the air inlet 51; one end of the flow guide 7 is connected to the front edge of the bottom wall 5, and the other end of the flow guide 7 is inclined toward the top of the bottom wall 5; the wind curtain generating assembly 4 is arranged at the top of the flow guide 7, and the wind curtain generating assembly 4 can form a wall-adhering airflow 9 on the lower surface of the flow guide 7.

[0065] The guide member 7 is arranged at the rear side of the air inlet 51, and the bottom wall is arranged at the rear side of the guide member 7. The wind curtain generating assembly 4 is arranged at the top end of the guide member 7, that is, the end of the guide member 7 away from the bottom wall 5, and the wind curtain generating assembly 4 is arranged on the lower surface of the guide member 7.

[0066] Under the action of negative pressure, the oil smoke 10 is sucked into the smoke collecting chamber through the air inlet 51. During the rising process, the oil smoke 10 will pass through the lower surface of the guide member 7. Since the wind curtain generating assembly 4 can form a wall-adhering airflow 9 on the lower surface of the guide member 7, the wall-adhering airflow 9 can isolate the adhesion of the oil smoke 10, so that the lower surface of the guide member 7 is not easy to be oiled. Moreover, the wall-adhering airflow 9 occupies the flow area that was originally distributed in a semicircular shape at the air inlet 51, so that the flow area at the air inlet 51 is distributed in a fan shape, and at the same time, the flow area at the air inlet 51 moves to the front side, thereby improving the smoking effect.

[0067] Furthermore, the air inlet device also includes an oil guide member 8; the lower surface of the bottom wall 5 is arranged in the horizontal direction; the oil guide member 8 is arranged above the bottom wall 5 and the flow guide member 7, and the upper surface of the oil guide member 8 is arranged at an angle to the horizontal plane.

[0068] Under the action of negative pressure, the oil smoke 10 is sucked into the smoke collecting chamber through the air inlet 51. During the rising process, the oil smoke 10 will pass through the lower surface of the guide member 7. Since the wind curtain generating assembly 4 can form a wall-adhering airflow 9 on the lower surface of the guide member 7, the wall-adhering airflow 9 can isolate the adhesion of the oil smoke 10, making it difficult for the lower surface of the guide member 7 to be stained with oil, and the oil guide member 8 is arranged above the bottom wall 5 and the guide member 7. The condensed oil 12 will gather on the upper surface of the oil guide member 8 and be introduced into the oil cup 6 through the upper surface of the oil guide member 8, so that the lower surface of the bottom wall 5 is arranged in a horizontal direction. The condensed oil 12 can also be introduced into the oil cup 6, and the lower surface of the guide member 7 is not arranged in a horizontal direction. The horizontal arrangement of the lower surface of the bottom wall 5 can reduce the volume of the bottom of the smoke collecting chamber, so that the smoke collecting chamber can be embedded in the wall cabinet as a whole, preventing the smoke collecting chamber from hitting the user and improving the user experience.

[0069] Specifically, along the front-to-back direction, the flip glass 3 is provided in front of the air inlet 51, and the air guide 7 is provided at the rear of the air inlet 51. One end of the air guide 7 is provided with a connecting portion 71, which is attached to and fixedly connected to the upper surface of the bottom wall 5, so that one end of the air guide 7 is connected to the bottom wall 5. Figure 1 、 Figure 11 、 Figure 12 and Figure 13 The directions indicated by arrows ab.

[0070] The oil guide member 8 is arranged above the bottom wall 5 and the flow guide member 7. The oil guide member 8 can cover the bottom wall 5 and the flow guide member 7, so that the condensed oil 12 drips onto the oil guide member 8 and prevents the condensed oil 12 from dripping onto the bottom wall 5 and the flow guide member 7.

[0071] The flow guide 7 can be in the shape of a plate or a block, etc. The oil guide 8 can be in the shape of a plate or a block, etc.

[0072] Furthermore, the wind curtain generating assembly 4 includes a wind curtain generating module 41 and a wall-attached module 42; the wind curtain generating module 41 is used to blow out airflow; the lower surface of the wall-attached module 42 is an arc surface, and the airflow 11 blown out by the wind curtain generating module can form a wall-attached airflow 9 on the lower surface of the wall-attached module 42; the airflow 11 blown out by the wind curtain generating module is tangent to one end of the lower surface of the wall-attached module 42, and the other end of the lower surface of the wall-attached module 42 is tangent to the surface of the smoke collecting chamber behind the air inlet 51.

[0073] When the air inlet 51 and the wind curtain generating assembly 4 are both arranged on the first wall 17, the other end of the lower surface of the wall-attached module 42 is tangent to the lower surface of the first wall 17 behind the air inlet 51; when the air inlet 51 is arranged on the bottom wall 5 and the wind curtain generating assembly 4 is arranged on the guide member 7, the other end of the lower surface of the wall-attached module 42 is tangent to the lower surface of the guide member 7.

[0074] Taking the example where the other end of the lower surface of the wall-attached module 42 is tangent to the lower surface of the guide member 7, the airflow 11 blown out by the wind curtain generating module is tangent to one end of the lower surface of the wall-attached module 42, so that the airflow flows into the lower surface of the wall-attached module 42 along the tangent direction of the lower surface of the wall-attached module 42. The airflow 11 blown out by the wind curtain generating module can form a wall-attached airflow 9 on the lower surface of the wall-attached module 42, and then flow into the lower surface of the guide member 7 along the tangent direction of the lower surface of the guide member 7, thereby forming a wall-attached airflow 9 on the lower surface of the guide member 7.

[0075] The airflow 11 blown out by the wind curtain generating module can form a wall-adhering airflow 9 on the lower surface of the wall-adhering module 42. The arc surface can be formed by one arc surface or by multiple arc surfaces connected to each other, and the two adjacent arc surfaces are tangent to each other, and the convex directions of the two adjacent arc surfaces are opposite.

[0076] In this embodiment, the lower surface of the wall-attached module 42 includes a first curved surface 421 and a second curved surface 422 connected to each other, the first curved surface 421 is tangent to the second curved surface 422, and the protrusion directions of the first curved surface 421 and the second curved surface 422 are opposite; one end of the first curved surface 421 is tangent to the airflow 11 blown out by the wind curtain generating module, and one end of the second curved surface 422 is tangent to the surface of the smoke collecting chamber behind the air inlet 51.

[0077] Taking the example of one end of the second curved surface 422 being tangent to the lower surface of the guide member 7, the airflow 11 blown out by the wind curtain generating module is tangent to one end of the first curved surface 421, so that the airflow flows into the first curved surface 421 along the tangent direction of the first curved surface 421, and the airflow flows along the first curved surface 421 and the second curved surface 422 along the wall, and flows from one end of the second curved surface 422 along the tangent direction of the lower surface of the guide member 7 into the lower surface of the guide member 7, thereby forming a wall-adhering airflow 9 on the lower surface of the guide member 7.

[0078] To better illustrate the principle of the airflow wall effect of this embodiment, a flat plate 13 and a curved surface 15 are used as an example. One end of the flat plate 13 is tangent to the curved surface 15. Point A is the intersection of the flat plate 13 and the curved surface 15. Airflow 16 enters the flat plate 13, and the direction of airflow 16 is parallel to the extension direction of the flat plate 13. Airflow 16 flows along the wall of the flat plate 13. After airflow 16 passes point A, due to inertia, airflow 16 will maintain its flow parallel to the extension direction of the flat plate 13. Figure 8 The air in area B will be carried away from the original area by the viscosity of the bottom airflow 16. In addition, the isolation effect of the airflow 16 prevents the atmosphere from replenishing the air in area B, which will cause area B to form an area below atmospheric pressure. In contrast, in the corresponding area C, although there will be a temporary local low pressure due to the viscosity of the upper airflow 16, area C can maintain atmospheric pressure because it is connected to the atmosphere. This will make the air pressure P B <P C , at air pressure P C Under the "squeezing" effect, the airflow 16 will "turn" and flow along the curved surface 15, thereby achieving wall-adhering flow.

[0079] Furthermore, the air outlet speed of the air curtain generating module 41 is V1, 1 m / s<V1<3 m / s.

[0080] Due to the limitation of the wind curtain forming mechanism, the air outlet speed of the wind curtain generating module 41 is less than 3m / s. If the air outlet speed of the wind curtain generating module 41 exceeds 3m / s, the wind curtain generating module 41 will generate a sharp noise similar to howling, which will greatly affect the user experience.

[0081] If the air velocity of the wind curtain generating module 41 is too low, the wall-adhering effect will not be achieved. This is because the airflow 11 blown out of the wind curtain generating module will be sucked back into the air inlet 51. When 1 m / s < V1, the airflow 11 blown out of the wind curtain generating module is not easily sucked back into the air inlet 51.

[0082] Furthermore, the distance between the two ends of the wall-attached module 42 is L1, and L1 is less than 120 mm.

[0083] In order to miniaturize and modularize the wall-attached module 42 , based on the fact that the thickness of the smoke collecting chamber of an existing European range hood is no more than 120 mm, the limit L1 is less than 120 mm, so that the wall-attached module 42 can be easily arranged in the smoke collecting chamber.

[0084] Furthermore, the wind curtain generating module 41 includes an air outlet, and the distance between the top edge 411 of the air outlet and the bottom edge 412 of the air outlet is d1, and d1 ≥ 5 mm.

[0085] The extension direction of the top edge 411 of the air outlet is parallel to the extension direction of the bottom edge 412 of the air outlet, and the bottom edge 412 of the air outlet is parallel to the lower surface of the guide member 7. The smaller d1 is, the smaller the air outlet speed requirement of the corresponding wind curtain generating module 41 that produces howling is. However, there is a requirement for sticking to the wall at the same time, and d1 ≥ 5mm can meet the above requirements.

[0086] Furthermore, the distance between the two ends of the wall-attached module 42 is L1, 3d1<L1<120mm.

[0087] When 1m / s<V1<3m / s, L1<120mm, and d1≥5mm, 3d1<L1<120mm can make the wall-adhering module 42 have a good wall-adhering effect, is not prone to howling, and has a small size for easy layout.

[0088] Furthermore, the radius of the first arc surface 421 is R1, the radius of the second arc surface 422 is R2, and 0.4R1<R2.

[0089] When 1 m / s<V1<3 m / s, L1<120 mm, and d1≥5 mm, 0.4R1<R2, the wall-adhering module 42 can have a good wall-adhering effect and a small volume for easy arrangement.

[0090] Furthermore, the air inlet device also includes an oil cup 6; a fitting portion 81 is provided at one end of the oil guide 8, the fitting portion 81 is fitted with the upper surface of the bottom wall 5, and the bottom wall 5 outside the fitting portion 81 is provided with a through hole 52; the oil cup 6 is connected to the lower surface of the bottom wall 5, and the opening of the oil cup 6 is connected to the through hole 52.

[0091] The oil cup 6 is fixed to the lower surface of the bottom wall 5 so that the oil cup 6 is fixed below the bottom wall 5. After the condensed oil 12 drips onto the upper surface of the oil guide 8, it slides along the oil guide 8 to the contact portion 81 and flows from the contact portion 81 into the oil cup 6 through the through hole 52.

[0092] Example 2

[0093] The range hood provided in this embodiment includes the air intake device provided in Example 1. Since the wall-adhering airflow 9 flows along the surface of the smoke collecting chamber behind the air inlet 51, under the action of the negative pressure of the air inlet 51, the wall-adhering airflow 9 is not easily captured by the air inlet 51, thereby realizing the partitioned flow of the wall-adhering airflow 9 and the airflow at the air inlet 51. Since the wall-adhering airflow 9 and the airflow at the air inlet 51 flow in partitions, and the wall-adhering airflow 9 is located behind the air inlet 51, the wall-adhering airflow 9 occupies the flow area originally distributed in a semicircular shape at the air inlet 51, making the flow area at the air inlet 51 fan-shaped, and at the same time moving the flow area at the air inlet 51 to the front side, thereby improving the smoking effect. The air intake device provided in this embodiment improves the smoking effect through the wall-adhering airflow 9 behind the air inlet 51, does not need to increase the air volume, can reduce noise, and improve user experience.

[0094] The range hood is further provided with a decorative cover 1 and a display panel 2. The decorative cover 1 is arranged above the smoke collecting chamber, and the display panel 2 is arranged on the front end surface of the smoke collecting chamber.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air inlet device, characterized in that: It includes a smoke collecting chamber and an air curtain generating assembly (4); The smoke collecting chamber is provided with an air inlet (51); The wind curtain generating assembly (4) is arranged at the rear side of the air inlet (51), and the wind curtain generating assembly (4) is capable of forming a wall-adhering airflow (9) on the surface of the smoke collecting cavity at the rear side of the air inlet (51).

2. The air inlet device according to claim 1, characterized in that: The smoke collecting chamber includes a first wall surface (17); The air inlet (51) and the wind curtain generating assembly (4) are both arranged on the first wall surface (17), and the wind curtain generating assembly (4) is capable of forming a wall-adhering airflow (9) on the lower surface of the first wall surface (17).

3. The air inlet device according to claim 1, characterized in that: The smoke collecting chamber comprises a bottom wall (5) and a flow guide (7); The guide member (7) and the bottom wall (5) are sequentially arranged on the rear side of the air inlet (51); one end of the guide member (7) is connected to the front edge of the bottom wall (5), and the other end of the guide member (7) is inclined toward the top of the bottom wall (5); The wind curtain generating assembly (4) is arranged at the top end of the flow guide (7), and the wind curtain generating assembly (4) is capable of forming a wall-adhering airflow (9) on the lower surface of the flow guide (7).

4. The air inlet device according to claim 3, characterized in that: The air inlet device further includes an oil guide member (8); The lower surface of the bottom wall (5) is arranged in a horizontal direction; The oil guide member (8) is arranged above the bottom wall (5) and the flow guide member (7), and the upper surface of the oil guide member (8) is arranged to be inclined with respect to the horizontal plane.

5. The air inlet device according to any one of claims 1 to 4, characterized in that: The wind curtain generating assembly (4) comprises a wind curtain generating module (41) and a wall-adhering module (42); The wind curtain generating module (41) is used to blow out airflow; The lower surface of the wall-adhering module (42) is a curved surface, and the airflow blown out by the wind curtain generating module (41) can form a wall-adhering airflow (9) on the lower surface of the wall-adhering module (42); The airflow blown out by the wind curtain generating module (41) is tangent to one end of the lower surface of the wall-adhering module (42), and the other end of the lower surface of the wall-adhering module (42) is tangent to the surface of the smoke collecting chamber behind the air inlet (51).

6. The air inlet device according to claim 5, characterized in that: The lower surface of the wall-adhering module (42) comprises a first curved surface (421) and a second curved surface (422) connected to each other, the first curved surface (421) and the second curved surface (422) are tangent to each other, and the first curved surface (421) and the second curved surface (422) have opposite convex directions; One end of the first curved surface (421) is tangent to the airflow blown out by the wind curtain generating module (41), and one end of the second curved surface (422) is tangent to the surface of the smoke collecting chamber behind the air inlet (51).

7. The air inlet device according to claim 6, characterized in that: The air outlet speed of the wind curtain generating module (41) is V1, 1m / s<V1<3m / s; The distance between the two ends of the wall-attached module (42) is L1, L1 < 120 mm; The wind curtain generating module (41) comprises an air outlet, and the distance between the top edge (411) of the air outlet and the bottom edge (412) of the air outlet is d1, and d1 is ≥ 5 mm.

8. The air inlet device according to claim 7, characterized in that: 3d1<L1<120mm.

9. The air inlet device according to claim 7, characterized in that: The radius of the first arc surface (421) is R1, the radius of the second arc surface (422) is R2, and 0.4R1<R2.

10. A range hood, characterized in that: The invention comprises the air inlet device according to any one of claims 1 to 9.

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