Air curtain range hood

Abstract

The utility model discloses an air curtain range hood which comprises an exhaust fume collecting hood and a blocking piece, a cavity is formed in the exhaust fume collecting hood, and the blocking piece divides the cavity into an exhaust fume collecting cavity section and an air curtain cavity section which are isolated from each other; a smoke inlet and an air outlet are formed in the bottom end of the smoke collecting hood, the air outlet is formed in the side portion of the smoke inlet, the smoke inlet is communicated with the smoke collecting cavity section, the smoke collecting cavity section is used for adsorbing oil smoke, the air outlet is communicated with the air curtain cavity section, and an air curtain is formed on one side of the smoke inlet. According to the range hood, the smoke collecting cavity section and the air curtain cavity section in the smoke collecting hood are isolated through the blocking piece, so that airflow of the two cavity sections runs independently, and the situation that the local airflow direction is disordered when airflow in two different directions converges in the smoke collecting hood is avoided.

Description

Technical Field

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

[0002] Currently, air curtain range hoods use an internal motor to drive a fan, generating suction to draw cooking fumes from the bottom of the hood into the interior and then exhaust them outdoors through a fume extraction channel. Simultaneously, other fans create an air curtain between the fume extraction area and the outside space. This air curtain prevents the fumes from spreading outwards, concentrating them within the extraction area for more efficient absorption.

[0003] However, in existing air curtain range hoods, the main suction duct and the air curtain circulation duct are often not completely separated. When the main suction duct is working, it generates a strong suction inside the range hood, while the air curtain circulation duct blows airflow out of the range hood. This causes the two airflows in different directions to converge inside the range hood, which in turn causes local airflow turbulence. As a result, the fumes cannot be effectively sucked into the main suction duct in the intended direction, reducing the range hood's efficiency in capturing fumes. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the present invention provides an air curtain range hood, which isolates the smoke collection chamber and the air curtain chamber by setting a barrier in the smoke collection hood, ensuring that the airflow of the two chambers runs independently, and avoiding the problem that the range hood's adsorption force for oil fumes is reduced or the air curtain effect is worse when two airflows in different directions converge in the smoke collection hood.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] A range hood with an air curtain includes a smoke collection hood and a barrier. The smoke collection hood has a cavity, and the barrier divides the cavity into a smoke collection chamber section and an air curtain chamber section that are isolated from each other. The bottom end of the smoke collection hood has a smoke inlet and an air outlet. The air outlet is located on the side of the smoke inlet. The smoke inlet is connected to the smoke collection chamber section, which is used to absorb cooking fumes. The air outlet is connected to the air curtain chamber section and forms an air curtain on one side of the smoke inlet.

[0007] Furthermore, the barrier includes a barrier plate, with its two sides connected to the two side walls of the cavity, and its two ends connected to the upper and lower end walls of the cavity.

[0008] Furthermore, the barrier plate is an arc-shaped plate, and the side of the arc-shaped plate facing the air curtain cavity section has a guiding arc surface.

[0009] Further, the barrier plate is a flat plate, and a shape of a longitudinal section of the flat plate is matched with a shape of a longitudinal section of the cavity.

[0010] Further, the barrier plate is integrally formed on the smoke collecting hood.

[0011] Further, the cavity is provided with a groove, and a peripheral edge of the barrier plate is provided with a protruding edge, the protruding edge is inserted into the groove, so that the barrier plate is detachably connected to the cavity.

[0012] Further, an outer periphery of the barrier plate is provided with an elastic pad, the elastic pad is used for being extruded and deformed when the barrier plate is assembled with the cavity, so as to seal a gap between the barrier plate and the cavity.

[0013] Further, the barrier plate is an elastic plate.

[0014] Further, a bottom of the smoke collecting hood is provided with an oil fume collecting area, the smoke inlet is communicated with the oil fume collecting area and the smoke collecting cavity section; the air curtain cavity section is arranged on both sides of the smoke collecting cavity section, the air outlet is arranged at the bottom of both sides of the smoke collecting hood, the smoke collecting hood is further provided with an air inlet, and the air curtain fan is arranged in the air curtain cavity section, and is used for guiding air flow to enter the air inlet and be discharged through the air outlet to form an air curtain on both sides of the oil fume collecting area.

[0015] Further, a top end of the smoke collecting hood is provided with a smoke discharging hood, the smoke discharging hood is provided with a smoke discharging cavity, and the smoke discharging cavity is communicated with the smoke collecting cavity section; the smoke discharging fan is arranged in the smoke discharging cavity, and is used for guiding the oil fume in the oil fume collecting area to enter the smoke collecting cavity section and be discharged through the smoke discharging cavity.

[0016] In summary, the air curtain oil fume exhauster has the following technical effects:

[0017] The barrier piece is used for isolating the smoke collecting cavity section and the air curtain cavity section in the smoke collecting hood, so that the air flows in the two cavity sections are independently operated, and the air flows in two different directions are prevented from converging in the smoke collecting hood, so that the problems, such as that the adsorption force of the oil fume exhauster on the oil fume is small or the air curtain effect is poor, are avoided. The air flow in the smoke collecting cavity section can stably flow and is not disturbed by the air curtain flow, so that the strong and stable adsorption capacity on the oil fume is ensured. The air curtain cavity section forms the air curtain on at least one side of the smoke inlet through the air outlet, so that the oil fume is better blocked from spreading around. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic view of a smoke collecting hood of an embodiment of the present utility model;

[0019] Figure 2 FIG. 2 is a longitudinal sectional view of the smoke collecting hood of the embodiment of the present utility model.

[0020] Figure 3 The top view of the smoke collecting hood of the embodiment of the utility model;

[0021] Figure 4 The longitudinal section view of the smoke collecting hood of the embodiment of the utility model at the position of the blocking piece;

[0022] Figure 5 The overall structure schematic view of the air curtain range hood of the embodiment of the utility model;

[0023] Figure 6 The longitudinal section view of the air curtain range hood of the embodiment of the utility model;

[0024] Figure 7 The structure schematic view of the air curtain range hood of the embodiment of the utility model after hiding the back plate.

[0025] Among them, the meaning of the reference signs is as follows:

[0026] 1, smoke collecting hood; 10, cavity; 11, air curtain cavity section; 12, smoke collecting cavity section; 13, smoke inlet; 14, air outlet; 15, air inlet; 16, oil fume suction area; 2, blocking piece; 21, air curtain fan; 22, mounting seat; 23, fan; 3, smoke exhaust hood; 31, smoke exhaust cavity; 32, smoke exhaust fan. DETAILED DESCRIPTION

[0027] In order to better understand and implement, the technical scheme in the embodiment of the utility model will be clearly and completely described below in combination with the drawings in the embodiment of the utility model.

[0028] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.

[0030] Referring to Figures 1 to 7 The utility model discloses an air curtain range hood, which comprises a smoke collecting hood 1 and a blocking piece 2. Figure 1 andFigure 2 The smoke hood 1 is provided with a cavity 10, and the blocking piece 2 separates the cavity 10 into a smoke collecting cavity section 12 and a wind curtain cavity section 11 which are isolated from each other. Figure 5 The bottom end of the smoke hood 1 is provided with a smoke inlet 13 and an air outlet 14, wherein the air outlet 14 is arranged at the side of the smoke inlet 13, the smoke inlet 13 is communicated with the smoke collecting cavity section 12, and the smoke collecting cavity section 12 is used for adsorbing oil fume. In addition, the air outlet 14 is communicated with the wind curtain cavity section 11 and forms a wind curtain at the side of the smoke inlet 13.

[0031] On the basis of the structure, when the wind curtain range hood is used, the wind curtain range hood is started first, the smoke collecting cavity section 12 starts to work and generates suction near the smoke inlet 13. The oil fume generated by the stove is quickly sucked into the smoke inlet 13 under the action of the suction of the smoke collecting cavity section 12 and flows to the inside along the channel of the smoke collecting cavity section 12. At the same time, the wind curtain cavity section 11 also starts to work, blows out the air in the wind curtain cavity section 11 from the air outlet 14 at the side of the smoke inlet 13 at a certain speed and angle, and forms a continuous wind curtain.

[0032] The air outlet 14 can be arranged at one side or both sides of the smoke inlet 13 and forms a wind curtain at one side or both sides of the smoke inlet 13. When the oil fume rises, the wind curtain blocks the oil fume from spreading to other areas of the kitchen, so that the oil fume can only move towards the smoke collecting cavity section 12, thereby increasing the efficiency of the oil fume being sucked into the smoke collecting cavity section 12.

[0033] It should be noted that if the smoke collecting cavity section 12 and the wind curtain cavity section 11 are not separated and isolated from each other, the smoke collecting cavity section 12 will generate strong suction when working, and the surrounding air and oil fume will be sucked into the inside of the smoke hood 1 together. The wind curtain cavity section 11 blows out the air flow to the outside of the smoke hood 1, and the blown air flow has a certain direction and speed. When the air flows in two different directions meet in the smoke hood 1, the local air flow direction will be disordered, and the fan needs to overcome the additional resistance caused by the mutual interference of the air flows when working, which will cause the adsorption force of the smoke collecting cavity section 12 to be small, and the wind curtain effect of the wind curtain cavity section 11 to be poor.

[0034] Therefore, the smoke collecting cavity section 12 and the wind curtain cavity section 11 are isolated by the blocking piece 2, so that the air flows of the two cavity sections run independently, the fan does not need to overcome the additional resistance caused by the mutual interference of the air flows when working, and a greater suction force and wind curtain effect can be generated. The air flow in the smoke collecting cavity section 12 can stably flow and is not disturbed by the wind curtain air flow, thereby ensuring the strong and stable adsorption capacity of the oil fume.

[0035] Further, referring to Figure 4 and Figure 7The barrier 2 comprises a barrier plate, and two sides of the barrier plate are connected to the two side walls of the cavity 10 respectively, and two ends of the barrier plate are connected to the upper and lower end walls of the cavity 10 respectively.

[0036] Thus, the barrier plate separates the cavity 10 into the smoke collecting cavity section 12 and the air curtain cavity section 11 which are isolated from each other, so that the air flows in the two cavity sections can run independently. The air flow in the smoke collecting cavity section 12 is driven by the negative pressure of the oil fume suction, and the direction is from the smoke inlet 13 to the air outlet. The air flow in the air curtain cavity section 11 is blown out by the fan, and forms an air curtain on at least one side of the smoke inlet 13 through the air outlet 14. This separation ensures that the air flow of the oil fume suction does not interfere with the air flow of the air curtain.

[0037] Since the air flow of the oil fume suction does not interfere, the air flow blown out by the air curtain cavity section 11 is more stable and uniform. The air blown out from the air outlet 14 can form a continuous and effective air curtain on at least one side of the smoke inlet 13, which better blocks the spread of oil fume to the surrounding.

[0038] In some embodiments, the barrier plate is an arc-shaped plate, and the arc-shaped plate has a guide arc surface on the side facing the air curtain cavity section 11.

[0039] Referring to Figure 2 The air inlet 15 of the air curtain cavity section 11 is arranged on the side of the smoke hood 1, and the air outlet 14 is arranged on the bottom of the smoke hood 1. In this embodiment, the arc-shaped plate is arranged as the barrier plate, and the arc-shaped plate has a guide arc surface on the side facing the air curtain cavity section 11. When the air curtain range hood is started, the external air begins to enter the air curtain cavity section 11 through the air inlet 15 arranged on the side of the smoke hood 1. The entering air flow has a certain initial direction and speed. Due to the presence of the arc-shaped plate, the air flow will contact the guide arc surface on the side of the arc-shaped plate facing the air curtain cavity section 11. As the air flow flows along the guide arc surface, the direction of the originally entering air flow from the side begins to gradually turn downward, and finally makes the air flow flow toward the air outlet 14 on the bottom of the smoke hood 1.

[0040] Thus, by guiding the air flow entering through the air inlet 15 to change direction through the guide arc surface, it can ensure that the air flow is blown out from the air outlet 14 on the bottom of the smoke hood 1 in the expected direction, and further forms an air curtain on at least one side of the smoke inlet 13. The fan of the air curtain cavity section 11 does not need to consume too much additional energy to overcome the resistance brought by the change of the direction of the air flow, so that a better air curtain effect can be formed under the same energy consumption.

[0041] Further, the barrier plate is a flat plate, referring to Figure 3 The shape of the longitudinal section of the flat plate is matched with the shape of the longitudinal section of the cavity 10.

[0042] Therefore, the longitudinal section shape of the flat plate is matched with the longitudinal section shape of the cavity 10, that is, the flat plate can reasonably divide the cavity 10 into two cavity sections according to the specific shape inside the smoke hood 1, without causing space waste or airflow dead angle due to shape mismatch.

[0043] Further, the blocking plate is integrally formed on the smoke hood 1.

[0044] Specifically, when the smoke hood 1 is made of metal materials such as stainless steel and aluminum alloy, the blocking plate can be integrally formed on the smoke hood 1 by stamping forming. Specifically, a stamping die is used to stamp the metal plate into the shape of the smoke hood 1 by strong pressure, and the blocking plate is formed at the corresponding position.

[0045] In addition, when the smoke hood 1 is made of plastic material, the integrally formed blocking plate and smoke hood 1 can be achieved by injection molding process.

[0046] Therefore, the integrally formed blocking plate and smoke hood 1 become a coherent whole structure without connection gaps or weak links. Since there is no connection gap, the problem of oil fume leakage or airflow interference is avoided.

[0047] Further, the cavity 10 is provided with a groove, and the periphery of the blocking plate is provided with a protruding edge, wherein the protruding edge is inserted into the groove, so that the blocking plate can be detachably connected to the cavity 10.

[0048] On the basis of this structure, the groove is continuously arranged on the two side walls and the upper and lower end walls of the cavity 10. In the assembly of the air curtain range hood, the protruding edge of the blocking plate is aligned with the grooves on the two side walls and the upper and lower end walls of the cavity 10. First, one end of the protruding edge is inserted into the starting position of the groove, and then the entire protruding edge is gradually inserted into the groove along the path of the groove, so that the blocking plate is firmly installed in the cavity 10, and the blocking plate divides the cavity 10 into the smoke collecting cavity section 12 and the air curtain cavity section 11. When cleaning or maintaining the range hood, the user can pull out the blocking plate from the groove.

[0049] Therefore, the detachable arrangement of the blocking plate greatly facilitates the cleaning work of the range hood. Since the oil fume is mainly concentrated in the smoke collecting cavity section 12, a large amount of oil stains will accumulate after long-term use. By detaching the blocking plate, the corners inside the smoke collecting cavity section 12 can be cleaned more directly.

[0050] In addition, during the operation of the range hood, either the suction force of the smoke collecting cavity section 12 or the air pressure of the air curtain cavity section 11 can act on the blocking plate. The close fit of the protruding edge and the groove can effectively resist these forces and prevent the blocking plate from shifting during operation, ensuring the stable separation of the smoke collecting cavity section 12 and the air curtain cavity section 11. The fit of the continuous groove and the protruding edge also provides good sealing, effectively preventing oil fumes from entering the air curtain cavity section 11 from the smoke collecting cavity section 12.

[0051] Further, the outer periphery of the blocking plate is provided with an elastic pad, and the elastic pad is used to be deformed by being squeezed when the blocking plate is assembled with the cavity 10, so as to seal the gap between the blocking plate and the cavity 10.

[0052] The elastic pad can be a sponge pad, a silica gel pad, etc., which is specifically arranged on the outer periphery of the protruding edge, or the elastic pad is formed as the protruding edge.

[0053] Therefore, after the protruding edge of the blocking plate is inserted into the groove in the cavity 10, the elastic pad is deformed by being squeezed and fills the gap between the blocking plate and the side wall and the upper and lower end wall of the cavity 10. Since the elastic pad closely fits the contact surface between the blocking plate and the cavity 10, it can prevent oil fumes or air from leaking from the gap.

[0054] In addition, the elastic pad not only seals the gap, but also has the functions of buffering and shock absorption. When the range hood is operating, the vibration of the fan can be transmitted through the smoke hood 1, causing noise. The elastic pad can absorb part of the vibration and reduce the transmission of vibration between the blocking plate and the cavity 10, thereby reducing the noise caused by vibration.

[0055] Further, the blocking plate is an elastic plate.

[0056] Specifically, the elastic plate can be a silica gel plate, a rubber plate, etc., which can better adapt to various assembly conditions when cooperating with the cavity 10. Even if there is a slight error in the size of the cavity 10 or the size changes due to factors such as temperature change, slight deformation, etc. during use, the elastic plate can closely fit the cavity 10 through its elastic deformation, ensuring the isolation effect of the smoke collecting cavity section 12 and the air curtain cavity section 11.

[0057] In addition, during the use of the range hood, it may be subjected to some accidental impact, such as accidental collision during cleaning or accidental impact of other objects in the kitchen. The elastic property of the elastic plate enables it to withstand a certain degree of impact without being easily damaged or deformed. Compared with the rigid blocking plate, the elastic plate can disperse the impact force through elastic deformation when impacted, avoiding excessive local stress that can cause rupture or permanent deformation.

[0058] Further, referring to Figure 6, the bottom of the smoke collecting hood 1 is provided with an oil fume suction area 16, and the smoke inlet 13 is communicated with the oil fume suction area 16 and the smoke collecting cavity section 12. Among them, the air curtain cavity section 11 is arranged on both sides of the smoke collecting cavity section 12, at the same time, the air outlet 14 is arranged at the bottom end of both sides of the smoke collecting hood 1, and the smoke collecting hood 1 is also provided with the air inlet 15. In addition, the air curtain cavity section 11 is provided with an air curtain fan 21, and the air curtain fan 21 is used for guiding the airflow to enter the air inlet 15 and be guided out through the air outlet 14 to form an air curtain on both sides of the oil fume suction area 16.

[0059] Among them, the air curtain fan 21 includes a mounting seat 22 and a fan 23, and the fan 23 is installed in the air curtain cavity section 11 through the mounting seat 22. When maintenance or cleaning is carried out, the air curtain fan 21 can be disassembled as a whole through the disassembly of the mounting seat 22 and operated in a wider place.

[0060] Therefore, the air curtain cavity section 11 and the smoke collecting cavity section 12 are isolated by the barrier 2, and the air curtain fan 21 guides the airflow to form an air curtain on both sides of the oil fume suction area 16, which can effectively limit the diffusion range of the oil fume. The oil fume is limited in the space between the air curtain and the oil fume suction area 16, and can only move towards the direction of the smoke inlet 13. The smoke collecting cavity section 12 fan generates a negative pressure for sucking oil fume, which greatly improves the collection rate of the oil fume. Even if a large amount of oil fume is generated during cooking or external airflow interference, the air curtain can prevent the oil fume from escaping to the side, and the effect of sucking oil fume is ensured.

[0061] Further, the top end of the smoke collecting hood 1 is provided with a smoke exhaust hood 3, the smoke exhaust hood 3 is provided with a smoke exhaust cavity 31, and the smoke exhaust cavity 31 is communicated with the smoke collecting cavity section 12. Among them, the smoke exhaust cavity 31 is provided with a smoke exhaust fan 32, and the smoke exhaust fan 32 is used for guiding the oil fume of the oil fume suction area 16 to enter the smoke collecting cavity section 12 and be discharged through the smoke exhaust cavity 31.

[0062] In use, the air curtain range hood is started, the smoke exhaust fan 32 starts to work and generates a negative pressure in the smoke exhaust cavity 31, the smoke collecting cavity section 12 and the oil fume suction area 16, and the oil fume generated during cooking is adsorbed into the smoke collecting cavity section 12 after rising to the oil fume suction area 16, and then enters the smoke exhaust cavity 31 along the flue of the smoke collecting cavity section 12, and then is discharged to the outdoor along the flue of the smoke exhaust cavity 31 under the work of the smoke exhaust fan 32.

[0063] The technical means disclosed in the utility model scheme is not only limited to the technical means disclosed in the above-mentioned embodiment, but also includes the technical scheme composed of any combination of the above technical features. It should be pointed out that for ordinary skilled persons in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the utility model.

Claims

1. A downdraught extractor characterised in that: The cooking fume hood comprises a fume collecting cover and a partition, the fume collecting cover is provided with a cavity, the partition separates the cavity into a fume collecting cavity section and an air curtain cavity section; the bottom end of the fume collecting cover is provided with a fume inlet and an air outlet, the air outlet is arranged at the side of the fume inlet, the fume inlet is communicated with the fume collecting cavity section, the fume collecting cavity section is used for adsorbing cooking fume, the air outlet is communicated with the air curtain cavity section and forms an air curtain at the side of the fume inlet.

2. The wind curtain hood as claimed in claim 1, wherein: The partition comprises a partition plate, the two sides of the partition plate are connected to the two side walls of the cavity, and the two ends of the partition plate are connected to the upper and lower end walls of the cavity.

3. The wind curtain hood as claimed in claim 2, wherein: The partition plate is an arc plate, and the side of the arc plate facing the air curtain cavity section has a guide arc surface.

4. The curta in hood according to claim 2, wherein: The partition plate is a flat plate, and the shape of the longitudinal section of the flat plate is matched with the shape of the longitudinal section of the cavity.

5. The down-draft range hood according to any one of claims 2-4, wherein: The partition plate is integrally formed on the fume collecting cover.

6. The down-draft range hood according to any one of claims 2-4, wherein: The cavity is provided with a groove, the periphery of the partition plate is provided with a protruding edge, the protruding edge is inserted into the groove, so that the partition plate can be detachably connected to the cavity.

7. The exhaust hood according to claim 6, characterized in that: The periphery of the partition plate is provided with an elastic pad, the elastic pad is used for being extruded and deformed when the partition plate and the cavity are assembled, so as to seal the gap between the partition plate and the cavity.

8. The exhaust hood as claimed in claim 6 wherein: The partition plate is an elastic plate.

9. The exhaust hood as claimed in claim 1 wherein: The bottom of the fume collecting cover is provided with a cooking fume suction area, the fume inlet communicates the cooking fume suction area with the fume collecting cavity section; the air curtain cavity section is arranged at the two sides of the fume collecting cavity section, the air outlet is arranged at the bottom end of the two sides of the fume collecting cover, the fume collecting cover is further provided with an air inlet, the air curtain cavity section is provided with an air curtain fan, the air curtain fan is used for guiding air flow to enter the air inlet and be discharged through the air outlet to form an air curtain at the two sides of the cooking fume suction area.

10. The down draft range hood according to claim 9, wherein: The top end of the fume collecting cover is provided with an exhaust cover, the exhaust cover is provided with an exhaust cavity, the exhaust cavity is communicated with the fume collecting cavity section; the exhaust cavity is provided with an exhaust fan, the exhaust fan is used for guiding cooking fume of the cooking fume suction area to enter the fume collecting cavity section and be discharged through the exhaust cavity.

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