CN219674331U - Fume exhaust fan - Google Patents

Abstract

The utility model discloses a range hood, which comprises a hood body and a fan curtain device, wherein the hood body comprises a fan cover and a fume collecting hood connected below the fan cover, the hood body is provided with a fume exhaust duct extending in the fume collecting hood and the fan cover, the fume collecting hood is provided with a fume exhaust port communicated with the fume exhaust duct, the fume collecting hood is provided with an air outlet independent of the fume exhaust port, the fan curtain device comprises a fan and a fan cavity seat, the fan is connected to the outer surface of the fan cover, the fan cavity seat comprises an air inlet and an air outlet, the air inlet is communicated with an air outlet of the fan, the air outlet is communicated with the air outlet, the outside air flows out of the air curtain air flow towards the lower direction through the air outlet and the air outlet under the driving of the fan, and the air curtain air flow is at least partially positioned in front of the fume exhaust port. The technical scheme of the utility model can effectively reduce the risk of sucking the oil smoke in the use process of the cooker hood.

Description

Fume exhaust fan

Technical Field

The utility model relates to the technical field of kitchen appliances, in particular to a range hood.

Background

In the cooking process, when the oil smoke rises, partial oil smoke can surge towards the front of the range hood, namely towards the direction of a cooker, so that the cooker can suck the oil smoke in the cooking process, the cooking experience of the cooker can be affected, and the health of the cooker can be affected for a long time.

Disclosure of Invention

The embodiment of the utility model provides a range hood, which can effectively reduce the risk of sucking oil smoke in the use process of the range hood for a cooking person.

In an embodiment of the present utility model, the range hood includes:

the smoke exhaust device comprises a smoke exhaust machine body, a smoke exhaust machine cover and a smoke exhaust machine cover, wherein the smoke exhaust machine body comprises a fan cover and a smoke collecting cover connected below the fan cover, the smoke exhaust machine body is provided with a smoke exhaust duct extending in the smoke collecting cover and the fan cover, the smoke collecting cover is provided with a smoke exhaust port communicated with the smoke exhaust duct, and the smoke collecting cover is provided with an air outlet independent of the smoke exhaust port; and

the air curtain device comprises a fan and an air cavity seat, the fan is connected to the outer surface of the fan cover, the air cavity seat comprises an air inlet and an air supply outlet, the air inlet is communicated with an air outlet of the fan, the air supply outlet is communicated with the air outlet, external air flows are blown out towards the air curtain air flow below through the air supply outlet and the air outlet under the driving of the fan, and the air curtain air flow is at least partially positioned in front of the smoking opening.

According to the range hood provided by the embodiment of the utility model, the air curtain device is adopted to form the air curtain airflow, and the air curtain airflow is used for blocking the oil smoke, so that the health influence on a cooker caused by the fact that the cooker sucks the oil smoke is avoided. The fan of the air curtain device can be connected to the outer surface of the fan cover, so that the fan can be installed outside the fan cover, the inner space of the fan cover is prevented from being occupied, the fan is installed, meanwhile, the air outlet can be arranged on the fume collecting hood, the air curtain airflow towards the lower side is directly blown out from the air supply outlet and the air outlet, the blown air curtain airflow can be located in front of the smoking opening, the air curtain airflow is formed rapidly, and the use experience of a cooking person on the air curtain device is improved.

In some embodiments, the wind cavity seat comprises a main body part and a transition part which are communicated, wherein an included angle is formed between the extending direction of the main body part and the extending direction of the transition part;

the air inlet is formed in the transition portion, the main body portion extends in the left-right direction of the fume collecting hood, the air supply opening is formed in one side, far away from the transition portion, of the main body portion, and the air supply opening and the air outlet extend in the extending direction of the main body portion.

In some embodiments, the transition portion has opposite first and second sidewalls in a left-right direction of the fume collecting hood, the first and second sidewalls being disposed at an angle therebetween;

defining an included angle between the first side wall and the vertical direction as alpha, and defining an included angle between the first side wall and the second side wall as beta, wherein the included angle satisfies the following conditions: alpha+beta is less than or equal to 50 degrees;

and define the height of transition portion in vertical direction to be L1, the height of main part in vertical direction is L2, satisfies the condition: l1: l2 is more than or equal to 1.5.

In some of these embodiments, the α satisfies the condition: alpha is more than or equal to 10 degrees and less than or equal to 30 degrees;

alternatively, the β satisfies the condition: beta is more than or equal to 10 degrees and less than or equal to 30 degrees.

In some embodiments, the wind cavity seat further comprises a first diversion portion, wherein the first diversion portion is arranged in the transition portion;

the first flow guiding part extends along the extending direction of the transition part, and is used for guiding the airflow of the transition part into the main body part.

In some embodiments, the first flow guiding parts are at least two, and the at least two first flow guiding parts are arranged at intervals along the left-right direction of the fume collecting hood;

and/or, in the extending direction of the transition part, defining the length of the first diversion part as L3, and the distance between the air outlet of the fan and the air supply outlet as L4, so as to satisfy the following conditions:

in some of these embodiments, the transition has opposing first and second sidewalls in a left-to-right direction of the fume collection hood, the first sidewall being parallel to the second sidewall;

the wind cavity seat further comprises a second flow guiding part, wherein the second flow guiding part is arranged in the transition part and forms an included angle with the vertical direction, the second flow guiding part extends along the direction towards the second side wall, and the second flow guiding part is used for guiding the airflow of the transition part into the main body part.

In some embodiments, the second flow guiding parts are at least two, and the at least two second flow guiding parts are arranged at intervals along the left-right direction of the fume collecting hood;

and/or, in the extending direction of the transition portion, defining the length of the second diversion portion as L5, and the distance between the air outlet of the fan and the air supply outlet as L6, so as to satisfy the following conditions:

in some of these embodiments, the air curtain device is located directly in front of the fan housing.

In some embodiments, the part of the main body extends out of the air outlet and defines the air supply outlet, and defines an included angle between the direction of the air supply outlet and the vertical direction as γ, so as to satisfy the condition: gamma is more than or equal to 30 degrees and less than or equal to 75 degrees.

In some embodiments, the air curtain device is provided with at least two, and the air outlet is provided with at least two;

at least two air curtain devices are arranged at intervals along the left-right direction of the fume collecting hood, at least two air cavity seats of the air curtain devices are arranged at intervals along the left-right direction of the fume collecting hood, and at least two air outlets are in one-to-one correspondence with at least two main body parts.

In some embodiments, the air outlet is adapted to the air supply outlet, and a distance between two adjacent air supply outlets is defined as L7, so as to satisfy the following conditions: l7 is more than or equal to 90mm and less than or equal to 110mm.

In some embodiments, the width of the air supply port in the thickness direction of the air cavity seat is defined as W, and the condition is satisfied: w is more than or equal to 2mm and less than or equal to 4mm.

In some embodiments, the air supply port includes a plurality of sub air supply ports, and the plurality of sub air supply ports are arranged at intervals along the left-right direction of the fume collecting hood, and each sub air supply port is communicated with the air outlet.

In some embodiments, in the extending direction of the main body portion, the widths of two adjacent sub-air outlets gradually increase.

In some embodiments, the smoke machine main body further comprises a decoration cover, at least part of the fan cover, the fan and the fan cavity seat are arranged in the decoration cover, the smoke collecting cover is connected below the decoration cover, and the decoration cover is provided with an air inlet communicated with the fan in a butt joint mode.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of an embodiment of a range hood according to the present utility model;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

fig. 3 is a schematic structural view of another embodiment of the range hood according to the present utility model;

fig. 4 is a schematic structural view of an embodiment of an air curtain device of the range hood shown in fig. 1;

fig. 5 is a schematic view of another embodiment of an air curtain device of the range hood shown in fig. 1;

FIG. 6 is a schematic view of an embodiment of a chamber seat of the air curtain device shown in FIG. 4;

FIG. 7 is a schematic view of another embodiment of an air chamber seat of the air curtain device shown in FIG. 4;

FIG. 8 is a schematic view of an embodiment of a chamber seat of the air curtain device shown in FIG. 4;

FIG. 9 is a schematic diagram of an embodiment of a chamber seat of the air curtain device shown in FIG. 2.

Reference numerals illustrate:

100. a range hood; 10. a tobacco machine main body; 11. a fan cover; 13. a fume collecting hood; 13a, a smoking mouth; 13b, an air outlet; 15. a decorative cover; 15a, an air inlet; 30. an air curtain device; 31. a blower; 31a, an air outlet; 33. a wind cavity seat; 331. a main body portion; 3311. an air supply port; 3311a, child air supply opening; 333. a transition section; 333a, air inlet; 3331. a first sidewall; 3333. a second sidewall; 335. a first flow guiding part; 337. and a second diversion part.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings.

When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with some aspects of the utility model as detailed in the accompanying claims.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description presented herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, in an embodiment of the present utility model, a range hood 100 is provided, the range hood 100 includes a hood body 10 and a fan curtain device 30, the hood body 10 includes a fan housing 11 and a smoke collecting hood 13 connected below the fan housing 11, the hood body 10 is formed with a smoke exhaust duct extending in the smoke collecting hood 13 and the fan housing 11, the smoke collecting hood 13 is provided with a smoke exhaust port 13a communicating with the smoke exhaust duct, the smoke collecting hood 13 is provided with an air outlet 13b independent of the smoke exhaust port 13a, the fan curtain device 30 includes a fan 31 and a fan chamber seat 33, the fan 31 is connected to an outer surface of the fan housing 11, the fan chamber seat 33 includes an air inlet 333a and an air outlet 3311, the air inlet 333a is communicated with the air outlet 31a of the fan 31, the air outlet 3311 is communicated with the air outlet 13b, the outside air is blown out toward the air curtain in the lower direction via the air outlet 3311 and the air outlet 13b under the driving of the fan 31, and the air curtain air flow is at least partially located in front of the smoke exhaust port 13 a.

The smoke exhaust port 13a of the smoke exhaust duct communicates indoors and is generally suspended above a kitchen range so as to suck the smoke into the smoke exhaust duct, and the smoke exhaust port of the smoke exhaust duct communicates outdoors so as to exhaust the smoke outdoors. Of course, a smoke exhaust fan is arranged in the smoke exhaust duct to enable air flow to flow from the smoke exhaust port 13a to the smoke exhaust port. It will be appreciated that the range hood body 10 functions as a conventional range hood 100.

The fan 31 may be a centrifugal fan 31 or an axial fan 31, when the fan 31 is an axial fan, an included angle is formed between an axis where an air inlet 333a of the fan 31 is located and an axis where an air outlet 31a of the fan 31 is located, so that air flows from the air inlet 333a to the air outlet 31a to turn, the pressure when the air flows into the air cavity seat 33 is improved, the air flow distribution in the cavity of the air cavity seat 33 is more uniform, and compared with the axial fan 31, the centrifugal fan 31 can reduce the installation space of the smoke ventilator body 10 occupied by the air curtain device 30.

The air chamber seat 33 may be made of plastic or metal, and when made of plastic, the air chamber seat 33 is relatively light and difficult to rust, and can be manufactured in an integral injection molding manner, so that the air chamber seat 33 is convenient to manufacture, and the material of the air chamber seat 33 is not specifically limited. The wind cavity seat 33 may be installed on the fan housing 11 indirectly by being in butt-joint communication with the fan 31 on one side, or may be in butt-joint communication with the fan 31 on one side and be directly connected with the fan housing 11. Further, the air cavity seat 33 may include a seat body and a cover plate, the seat body is provided with an opening, the cover plate covers the opening and encloses with the seat body to form an air cavity, the air inlet 333a may be provided on the seat body, the air outlet 3311 may be provided on the seat body, and the cover plate and the seat body may be movably connected to shield or expose the opening through the movable connection therebetween, so that the operation of the staff is facilitated.

It will be appreciated that the kitchen range will generate a smoke area when in operation, the air curtain airflow may be located between the smoke area and the cookers to block the smoke in the smoke area, and in a specific manner, the air curtain airflow may be located in front of the smoke suction opening 13a, that is, located between the smoke suction opening 13a and the cookers and closer to the cookers, so as to achieve partial blocking, and the air curtain device 30 is disposed on the front surface of the fan housing 11; it is also possible that the air curtain airflow can surround the cooking fume area and be closer to one side of the cooking person to achieve annular blocking, and the air curtain device 30 is disposed on both side surfaces of the fan housing 11 in addition to the front surface of the fan housing 11. The generation principle of the air curtain airflow is as follows: under the driving of the fan 31, the air flow in the kitchen can flow from the air outlet 31a of the fan 31 to the air inlet 333a of the air cavity seat 33 and then flow from the air cavity of the air cavity seat 33 to the air supply outlet 3311 of the air cavity seat 33, so that the air curtain air flow facing downwards can be blown out from the air supply outlet 3311 and the air outlet 13b, and at least part of the air curtain air flow is positioned in front of the smoking opening 13a, so that the air curtain air flow can block the oil smoke, and the oil smoke is prevented from approaching the face of a user, so that the health influence caused by the oil smoke sucked by the user is prevented.

According to the technical scheme, the air curtain device 30 is adopted to form air curtain air flow, and the air curtain air flow is used for blocking oil smoke, so that the health influence on a cooker caused by the fact that the cooker sucks the oil smoke is avoided. The fan 31 of the air curtain device 30 can be connected to the outer surface of the fan cover 11, so that the fan 31 can be mounted outside the fan cover 11, the inner space of the fan cover 11 is prevented from being occupied to mount the fan 31, meanwhile, the air outlet 13b can be arranged on the fume collecting hood 13, and the air curtain airflow facing downwards is directly blown out by the air supply outlet 3311 and the air outlet 13b, so that the blown air curtain airflow can be positioned in front of the smoking opening 13a to quickly form the air curtain airflow, and the use experience of a cooking person on the air curtain device 30 is improved.

Further, referring to fig. 4 to 5, in order to avoid excessive pressure loss of the airflow flowing through the air chamber seat 33, the air chamber seat 33 includes a main body 331 and a transition portion 333, the extending direction of the main body 331 and the extending direction of the transition portion 333 are disposed at an included angle, an air inlet 333a is disposed at the transition portion 333, the main body 331 extends along the left-right direction of the fume collecting hood 13, an air supply port 3311 is disposed at one side of the main body 331 away from the transition portion 333, and the air supply port 3311 and an air outlet 13b extend along the extending direction of the main body 331. Since the main body 331 is extended in the right-left direction in order to improve the uniformity of the air flow in the right-left direction, if the air flow directly enters the main body 331 through the air outlet 31a, the air flow turns too hard, and excessive pressure is lost. Therefore, by providing the transition portion 333, the air flow can flow through the transition portion 333 before flowing into the main body 331 under the guidance of the transition portion 333, so that the pressure loss of the air flow flowing in the air cavity seat 33 can be reduced, and the uniformity of the air outlet 13b can be improved.

Further, referring to fig. 4 to 5, in order to further reduce the pressure loss of the airflow flowing through the air chamber seat 33, the transition portion 333 has a first side wall 3331 and a second side wall 3333 opposite to each other in the left-right direction of the fume collecting hood 13, the first side wall 3331 and the second side wall 3333 form an included angle, the included angle between the first side wall 3331 and the vertical direction is defined as α, the included angle between the first side wall 3331 and the second side wall 3333 is defined as β, and the following conditions are satisfied: α+β is equal to or less than 50 °, and defines the height of the transition portion 333 in the vertical direction as L1, and the height of the main body portion 331 in the vertical direction as L2, satisfying the condition: l1: l2 is more than or equal to 1.5. In this way, the cross-sectional area of the transition portion 333 can be prevented from expanding too much, so that the pressure loss of the air flow can be reduced when the air flow flows through the transition portion 333, and the air curtain air flow is more uniform when the air outlet 13b is out. It should be emphasized that the angle value of α+β and the ratio of L1 to L2 are in a mutually matched relationship, and if the angle value of α+β is larger, the ratio of L1 to L2 needs to be reduced at this time; if the ratio of L1 to L2 is smaller, the angle value of α+β needs to be reduced; this prevents the cross-sectional area of the transition 333 from becoming excessively large, so as to reduce the pressure loss of the air flow. Here, the angle value of α+β is specifically set to 10 °, 20 °, 30 °, 40 °, or 50 °, etc., and the ratio between L1 and L2 may be specifically set to 1.5, 1.7, 1.9, 2.1, 2.3, or 2.5, etc., and the cross-sectional area expansion of the transition portion 333 may be avoided from being excessively large without limitation.

In addition, as shown in fig. 4 to 5, the direction of the dotted arrow in fig. 4 and 5 is the direction of the driving airflow of the fan 31, in some embodiments, when the direction of the driving airflow of the fan 31 is counterclockwise, the airflow discharged from the air outlet 31a flows in the counterclockwise direction, and at this time, the airflow flows toward the second side wall 3333, and the second side wall 3333 guides the airflow to the portion of the main body 331 along the extending direction thereof, so as to achieve the uniformity of the air curtain airflow blown out by the air outlet 3311 and the air outlet 13b.

Further, referring to fig. 6, the range value of the angle α of the first sidewall 3331 with respect to the vertical direction may be set to 10 ° or more α or less than 30 °. In this way, on the one hand, the too small included angle between the first side wall 3331 and the vertical direction can be avoided, so that the ratio of L1 to L2 is avoided to be too large, so as to prevent the too large volume of the wind cavity seat 33 caused by the too large height of the transition section, or prevent the too small height of the main body 331 so as to influence the uniformity of the air outlet; on the other hand, the included angle between the first side wall 3331 and the vertical direction can be avoided from being too large, so that the ratio of L1 to L2 is avoided from being too small, the transition effect can not be achieved due to the too small height of the transition section, or the volume of the wind cavity seat 33 is too large due to the too large height of the main body 331. The angle value of α may be set to 10 °, 15 °, 20 °, 25 °, 30 °, or the like.

Alternatively, the range value of the angle β between the first side wall 3331 and the second side wall 3333 may be set to 10+.ltoreq.β.ltoreq.30 °. In this way, on the one hand, the included angle between the first side wall 3331 and the second side wall 3333 is too small, so as to avoid the excessively large ratio of L1 to L2, so as to prevent the excessively large volume of the air chamber seat 33 caused by excessively large height of the transition section, or prevent the excessively small height of the main body 331 so as to affect the uniformity of the air outlet; on the other hand, the too large included angle between the first side wall 3331 and the second side wall 3333 can be avoided, so that the ratio of L1 to L2 is avoided to be too small, so that the transition effect cannot be achieved due to too small height of the transition section, or the volume of the wind cavity seat 33 is too large due to too large height of the main body 331. The angle value of β may be set to 10 °, 15 °, 20 °, 25 °, 30 °, or the like.

It should be noted that α and β need to satisfy α+β being equal to or less than 50 °, i.e., in some exemplary embodiments, when α is 30 °, the angle value of β needs to be equal to or less than 20 °; in other exemplary embodiments, the angle value of α is required to be less than or equal to 25 ° when β is 25 °.

With continued reference to fig. 7, in an embodiment, the wind chamber seat 33 further includes a first guiding portion 335, the first guiding portion 335 is disposed in the transition portion 333, the first guiding portion 335 extends along an extending direction of the transition portion 333, and the first guiding portion 335 is configured to guide the airflow of the transition portion 333 into the main portion 331.

In this embodiment, in order to further improve the uniformity of the air curtain during the air blowing, the first guiding portion 335 is provided, and the partially disturbed air at the air outlet 31a is better guided into the main body 331 by the first guiding portion 335, so as to improve the air outlet uniformity of the air curtain. The specific structural form of the first flow guiding portion 335 may be a form of a flow guiding rib, a flow guiding strip, or a flow guiding plate, and the connection form of the first flow guiding portion 335 in the air cavity seat 33 may be an integral structure, for example, the connection of the two may be achieved by an integral injection molding mode, or a split structure, for example, an adhesive, a fastening mode, or a threaded connection, which are not limited herein.

Further, as shown in fig. 7, at least two first diversion portions 335 are disposed at intervals along the left-right direction of the fume collecting hood 13, so that the guiding effect on the partially disturbed airflow is further improved in the left-right direction, and the air outlet uniformity of the air curtain airflow is improved, wherein the first diversion portions 335 may be disposed with two, three or four, etc., and the number of the first diversion portions 335 may be selected according to the specific space inside the transition portion 333 and the required diversion effect;

and/or, in the extending direction of the transition portion 333, the length of the first guiding portion 335 is defined as L3, the distance between the air outlet 31a of the fan 31 and the air supply port 3311 is L4, and the following conditions are satisfied:thus, while ensuring the guiding effect on the air flow, the situation that the air flow is blocked due to the overlong length of the first guiding portion 335, so that the air flow discharged from the air outlet 31a cannot uniformly flow in the left-right direction of the main body portion 331 is avoided.

Referring to fig. 8, in an embodiment, the transition portion 333 has a first side wall 3331 and a second side wall 3333 opposite to each other in the left-right direction of the fume collecting hood 13, and the first side wall 3331 is parallel to the second side wall 3333;

the air chamber seat 33 further includes a second guiding portion 337, where the second guiding portion 337 is disposed in the transition portion 333 and forms an included angle with the vertical direction, the second guiding portion 337 extends along a direction towards the second side wall 3333, and the second guiding portion 337 is used for guiding the airflow of the transition portion 333 into the main body 331.

In this embodiment, when the first side wall 3331 and the second side wall 3333 of the fan 31 are parallel, and the transition portion 333 is disposed vertically with the main body portion 331, the second side wall 3333 cannot better guide the air flow discharged from the air outlet 31a into the main body portion 331 when the direction of the driving air flow is counterclockwise, i.e. the direction of the dashed arrow shown in fig. 4, so the second guiding portion 337 is provided to guide the air flow, thereby improving the uniformity of the air curtain air flow in the air outlet. In addition, when the transition portion 333 is disposed vertically to the main body portion 331, the overall volume of the air chamber seat 33 can be reduced, thereby reducing the space occupied by the air curtain device 30 in the hood main body 10.

The specific structural form of the second guiding portion 337 may be a guiding rib, a guiding strip, or a guiding plate, and the connection form of the second guiding portion 337 in the wind cavity seat 33 may be an integral structure, for example, the connection between the two structures is achieved by an integral injection molding mode, or a split structure, for example, an adhesive, a fastening mode, or a threaded connection, which are not limited herein.

Further, at least two second guiding portions 337 are provided, and at least two second guiding portions 337 are arranged at intervals along the left-right direction of the fume collecting hood 13, so that the guiding effect on the partially disturbed air flow is further improved in the left-right direction, and the air outlet uniformity of the air curtain air flow is improved, wherein the second guiding portions 337 can be provided with two, three or four, etc., and the number of the second guiding portions 337 can be selected according to the specific space inside the transition portion 333 and the required guiding effect;

and/or, in the extending direction of the transition portion 333, the length of the second guiding portion 337 is defined as L5, and the distance between the air outlet 31a of the fan 31 and the air supply port 3311 is defined as L6, which satisfies the condition:so as to prevent the air flow from being blocked due to the overlong length of the second flow guiding part 337 while ensuring the guiding effect on the air flow, so that the air outletThe airflow discharged from the main body 331 a cannot uniformly flow in the left-right direction.

Referring to fig. 1-2, in one embodiment, the air curtain apparatus 30 is positioned directly in front of the fan guard 11.

In this embodiment, in order to avoid excessive occupation of the cabinet space on both sides of the range hood 100 when the range hood 100 is installed in a kitchen, the air curtain device 30 is disposed directly in front of the fan housing 11, so that the fan 31 and the air cavity seat 33 are disposed directly in front of the fan housing 11, and excessive occupation of the cabinet space on both sides of the range hood 100 can be avoided. In addition, the air outlet 13b may be disposed directly in front of the fume collecting hood 13, so that when the air curtain device 30 is also located directly in front of the fan housing 11, the structure of the air chamber seat 33 for guiding the air flow to the air outlet 13b is simpler, so that the structure of the air curtain device 30 is more compact. In addition, when the range hood 100 is mounted to a kitchen cabinet, if the air curtain devices 30 are located at both sides of the fan housing 11, it may be inconvenient for a worker to disassemble and assemble the air curtain devices 30 because of limited cabinet space at both sides, and when the air curtain devices 30 are located right in front of the fan housing 11, the worker can directly face the air curtain devices 30 to facilitate the operation, thereby improving the work efficiency of the worker.

Further, referring to fig. 1, the projection of the fan 31 on the fan housing 11 is located in the fan housing 11, so that the fan 31 can be prevented from occupying the space of the range hood 100 in the left-right direction, and the range hood 100 can be prevented from occupying too much cabinet space on both sides when being installed in a kitchen.

Referring to fig. 2, in an embodiment, a part of the main body 331 extends out of the air outlet 13b and defines an air outlet 3311, and an included angle between the direction of the air outlet 3311 and the vertical direction is defined as γ, which satisfies the following conditions: gamma is more than or equal to 30 degrees and less than or equal to 75 degrees.

In this embodiment, if γ is smaller than 30 °, the air supply port 3311 will be directed towards the kitchen range, so that the oil smoke generated by the kitchen range will be dispersed by the air curtain air flow, and part of the dispersed oil smoke will enter the body of the cooker to cause the health effect of the cooker; if γ is greater than 75 °, the air curtain airflow cannot be formed between the cooker and the smoke suction opening 13a due to the lower height of some cookers, i.e. the oil smoke will directly enter the experience of the cooker from below the air curtain airflow. Therefore, when the range value of gamma is set to be 30-75 degrees, the blown air curtain airflow can well block the oil smoke in the oil smoke area, and the range value of gamma is suitable for cooking persons with different heights, so that the range value of gamma is better in universality. Specifically, the value of γ may be specifically set to 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, 70 °, 75 °, or the like, without limitation.

Further, the range of γ can be set to 45 ° to 75 °, so that the air curtain airflow sent out by the air supply port 3311 can be further avoided to blow away the oil smoke, so that the blown air curtain airflow can better block the oil smoke in the oil smoke area, and the use experience of a cooking person on the range hood 100 is further improved. Specifically, the value of γ may be specifically set to 45 °, 50 °, 60 °, 70 °, 75 °, or the like, without limitation.

Referring to fig. 1, in an embodiment, the air curtain device 30 is provided with at least two air outlets 13b, the at least two air curtain devices 30 are arranged at intervals along the left-right direction of the fume collecting hood 13, the air cavity seats 33 of the at least two air curtain devices 30 are arranged at intervals along the left-right direction of the fume collecting hood 13, and the at least two air outlets 13b are in one-to-one correspondence with the at least two main body portions 331.

In this embodiment, in order to reduce the volume of the air curtain device 30, at least two air curtain devices 30 are provided, that is, at least two fans 31 and at least two fan 31 seats are provided, and the air volume achieved by the at least two fans 31 is equal to or better than the air volume achieved by the larger-sized fans 31 under the combined action of the at least two fans 31, so that at least two smaller-sized fans 31 can be selected to replace one larger-sized fan 31, particularly, the size of the air curtain device 30 is reduced in the thickness direction of the fan 31, so that the air curtain device 30 is more exquisite, and the installation space required by the air curtain device 30 on the main body 10 of the cigarette machine is reduced.

In some exemplary embodiments, when the number of air curtain devices 30 is two, the following may be used: as shown in fig. 4, one of the air chamber seats 33 of the air curtain device 30 is located at the left side in the left-right direction, the first side wall 3331 and the second side wall 3333 are disposed at an included angle, and the air chamber seat 33 of the air curtain device 30 is located at the right side, the first side wall 3331 and the second side wall 3333 are parallel; as shown in fig. 5, another air curtain device 30 located on the left side and air curtain device 30 located on the right side in the left-right direction are arranged in such a way that the first side wall 3331 of each air curtain device is disposed at an angle with the corresponding second side wall 3333; in addition, in the left-right direction, the air curtain device 30 on the left side and the air curtain device 30 on the right side are both parallel to the corresponding second side wall 3333 on the first side wall 3331.

The two air curtain devices 30 are arranged at intervals along the left-right direction, and one air cavity seat 33 extends along the direction away from the other air cavity seat 33, so as to avoid mutual interference between the two air cavity seats 33 and ensure uniformity of air flow out of the air curtain, however, the number of the air curtain devices 30 can be three, four, five or six, and the like, and the air curtain devices are not limited herein.

Further, referring to fig. 4 and 5, the air outlet 13b is adapted to the air outlets 3311, and defines a distance L7 between two adjacent air outlets 3311, which satisfies the following conditions: in fig. 4 and 5, when the flow direction of the air flow driven by the fan 31 of the air curtain device 30 located at the left side is counterclockwise, the air curtain air flow still flows partially in the counterclockwise direction when blown out, and the air flow of the air curtain device 30 located at the right side is interfered, so that the air flow is disturbed, and therefore, the range value of the interval between the two air supply outlets 3311 is set between 90mm and 110mm, the interference of the air curtain air flow between the two adjacent air supply outlets 3311 can be avoided, and the generation effect of the air curtain air flow is improved. Specifically, the specific value of L7 may be 90mm, 95mm, 100mm, 105mm or 110mm, etc., so as to avoid interference of air curtain air flow between two adjacent air inlets 3311. The air outlet 13b is adapted to the air outlet 3311, that is, the size and shape between the air outlet 13b and the air outlet 3311 are adapted, wherein one mode may be that a part of the structure of the main body 331 provided with the air outlet 3311 does not extend out of the air outlet 13b, at this time, airflow sequentially flows through the air outlet 3311 and the air outlet 13b and then flows to the outside, and another mode may be that a part of the structure of the main body 331 extends out of the air outlet 13b to define the air outlet 3311, at this time, the air outlet 13b plays a role of avoiding, and airflow can directly flow through the air outlet 3311 and then flows to the outside.

It should be emphasized that, referring to fig. 5, in this embodiment, in order to avoid interference of the air curtain flows from the adjacent two air inlets 3311, the ratio of the length of the air inlet 3311 in the extending direction of the main body 331 to the extending length of the main body 331 of the air curtain device 30 located on the right side in the left-right direction needs to be smaller than the ratio of the length of the air inlet 3311 of the air curtain device 30 located on the left side in the extending direction of the main body 331 to the extending length of the main body 331, so that the adjacent two air inlets 3311 have the distance L7, and the air curtain flows of the adjacent two air inlets 3311 are prevented from interfering with each other.

Referring to fig. 9, in an embodiment, a width W of the air outlet 3311 in a thickness direction of the air chamber seat 33 is defined to satisfy the following conditions: w is more than or equal to 2mm and less than or equal to 4mm.

In this embodiment, when the width range of the air supply opening 3311 is set within 2mm to 4mm, the application range of the air curtain airflow can be ensured, and meanwhile, the flow speed of the air curtain airflow is made to be appropriate to ensure the formation of the air curtain airflow. Specifically, the specific value of W may be 2mm, 2.5mm, 3mm, 3.5mm, 4mm, or the like, without limitation.

Further, referring to fig. 9, the air supply port 3311 includes a plurality of sub air supply ports 3311a, and the plurality of sub air supply ports 3311a are arranged at intervals along the left-right direction of the fume collecting hood 13, and each sub air supply port 3311a is communicated with the air outlet 13b. Under the interval setting of a plurality of supply-air outlets 3311, can be formed with the strengthening rib between two adjacent supply-air outlets 3311, so can improve the intensity of the structure that main part 331 was equipped with supply-air outlet 3311 department through the strengthening rib, avoid main part 331 to take place to warp.

Further, since the air volume of the sub-air-supply port 3311a closer to the blower 31 is larger than the air volume of the sub-air-supply port distant from the blower 31, the widths of the adjacent two sub-air-supply ports 3311a in the extending direction of the main body 331 are gradually increased, and the air volume of each sub-air-supply port 3311a is uniform by providing different sizes for the sub-air-supply ports 3311a at different positions, so that the uniformity of the air curtain air flow is improved.

Referring to fig. 3, in an embodiment, the main body 10 of the cigarette machine further includes a decoration cover 15, at least part of the fan cover 11, the fan 31 and the air cavity seat 33 are disposed in the decoration cover 15, the smoke collecting hood 13 is connected below the decoration cover 15, and the decoration cover 15 is provided with an air inlet 15a in butt joint communication with the fan 31.

In the present embodiment, under the shielding of the fan housing 11, the fan 31 and the air chamber seat 33 by the decorative cover 15, when a cooking person looks at the outside, the external aesthetic property of the whole range hood 100 can be ensured, and at the same time, at least part of the fan housing 11, the fan 31 and the air chamber seat 33 can be protected. Meanwhile, the decoration cover 15 is provided with an air inlet 15a which is in butt joint communication with the fan 31, so that when the fan 31 works, external air flow can enter the fan 31 through the air inlet 15a of the decoration cover 15, and then the air flow sequentially passes through the subsequent air inlets to generate air curtain air flow under the driving of the fan 31.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (16)

1. A range hood (100), comprising:

the smoke ventilator comprises a smoke ventilator body (10), wherein the smoke ventilator body (10) comprises a fan cover (11) and a smoke collecting cover (13) connected below the fan cover (11), the smoke ventilator body (10) is provided with a smoke exhaust air duct extending in the smoke collecting cover (13) and the fan cover (11), the smoke collecting cover (13) is provided with a smoke exhaust opening (13 a) communicated with the smoke exhaust air duct, and the smoke collecting cover (13) is provided with an air outlet (13 b) independent of the smoke exhaust opening (13 a); and

air curtain device (30), air curtain device (30) include fan (31) and wind chamber seat (33), fan (31) connect in the surface of fan housing (11), wind chamber seat (33) are including income wind gap (333 a) and supply-air outlet (3311), go into wind gap (333 a) with air exit (31 a) intercommunication of fan (31), supply-air outlet (3311) with air outlet (13 b) intercommunication under the drive of fan (31), external air current is via supply-air outlet (3311) and air outlet (13 b) blowout air curtain air current towards below, just air curtain air current is at least partly located the place ahead of smoking mouth (13 a).

2. The range hood (100) according to claim 1, wherein the air chamber seat (33) comprises a main body portion (331) and a transition portion (333) which are communicated, and an included angle is formed between an extending direction of the main body portion (331) and an extending direction of the transition portion (333);

the air inlet (333 a) is formed in the transition portion (333), the main body portion (331) extends along the left-right direction of the fume collecting hood (13), the air supply opening (3311) is formed in one side, away from the transition portion (333), of the main body portion (331), and the air supply opening (3311) and the air outlet (13 b) extend along the extending direction of the main body portion (331).

3. The range hood (100) according to claim 2, wherein the transition (333) has opposite first and second side walls (3331, 3333) in the left-right direction of the fume collecting hood (13), the first and second side walls (3331, 3333) being disposed at an angle therebetween;

defining an included angle between the first side wall (3331) and the vertical direction as alpha, and defining an included angle between the first side wall (3331) and the second side wall (3333) as beta, wherein the included angle satisfies the following conditions: alpha+beta is less than or equal to 50 degrees;

and defining the height of the transition part (333) in the vertical direction as L1, and the height of the main body part (331) in the vertical direction as L2, satisfying the condition: l1: l2 is more than or equal to 1.5.

4. A range hood (100) according to claim 3, wherein said α satisfies the condition: alpha is more than or equal to 10 degrees and less than or equal to 30 degrees;

alternatively, the β satisfies the condition: beta is more than or equal to 10 degrees and less than or equal to 30 degrees.

5. A range hood (100) according to claim 3, wherein the air chamber seat (33) further comprises a first flow guiding portion (335), the first flow guiding portion (335) being provided in the transition portion (333);

the first flow guiding portion (335) extends along the extending direction of the transition portion (333), and the first flow guiding portion (335) is used for guiding the airflow of the transition portion (333) into the main body portion (331).

6. The range hood (100) according to claim 5, wherein at least two first diversion portions (335) are provided, and at least two first diversion portions (335) are arranged at intervals along the left-right direction of the fume collecting hood (13);

and/or, in the extending direction of the transition portion (333), defining the length of the first flow guiding portion (335) as L3, and the distance between the air outlet (31 a) of the fan (31) and the air supply port (3311) as L4, which satisfies the condition:

7. the range hood (100) according to claim 2, wherein the transition (333) has opposite first (3331) and second (3333) side walls in the left-right direction of the fume collecting hood (13), the first side wall (3331) being parallel to the second side wall (3333);

the wind cavity seat (33) further comprises a second flow guiding part (337), the second flow guiding part (337) is arranged in the transition part (333) and is arranged at an included angle with the vertical direction, the second flow guiding part (337) extends along the direction towards the second side wall (3333), and the second flow guiding part (337) is used for guiding the airflow of the transition part (333) into the main body part (331).

8. The range hood (100) according to claim 7, wherein at least two second flow guiding portions (337) are provided, and at least two second flow guiding portions (337) are arranged at intervals along the left-right direction of the fume collecting hood (13);

and/or, in the extending direction of the transition portion (333), defining the length of the second flow guiding portion (337) as L5, and the distance between the air outlet (31 a) of the fan (31) and the air supply port (3311) as L6, which satisfies the condition:

9. the range hood (100) of claim 1, wherein the air curtain device (30) is located directly in front of the fan housing (11).

10. The range hood (100) according to claim 2, wherein the partial structure of the main body portion (331) extends out of the air outlet (13 b) and defines the air outlet (3311), and defines an included angle between the direction of the air outlet (3311) and the vertical direction as γ, which satisfies the condition: gamma is more than or equal to 30 degrees and less than or equal to 75 degrees.

11. The range hood (100) according to claim 2, 3, 4, 5, 6, 7, 8 or 10, wherein at least two air curtain devices (30) are provided and at least two air outlets (13 b) are provided;

at least two air curtain devices (30) are arranged at intervals along the left-right direction of the fume collecting hood (13), air cavity seats (33) of the at least two air curtain devices (30) are arranged at intervals along the left-right direction of the fume collecting hood (13), and at least two air outlets (13 b) are in one-to-one correspondence with at least two main body parts (331).

12. The range hood (100) according to claim 11, wherein the air outlet (13 b) is adapted to the air supply openings (3311), and a distance between two adjacent air supply openings (3311) is defined as L7, which satisfies the condition: l7 is more than or equal to 90mm and less than or equal to 110mm.

13. The range hood (100) according to claim 2, 3, 4, 5, 6, 7, 8 or 10, wherein a width of the air supply opening (3311) in a thickness direction of the air chamber seat (33) is defined as W, satisfying the condition: w is more than or equal to 2mm and less than or equal to 4mm.

14. The range hood (100) according to claim 13, wherein the air supply port (3311) includes a plurality of sub air supply ports (3311 a), the plurality of sub air supply ports (3311 a) are arranged at intervals along the left-right direction of the fume collecting hood (13), and each sub air supply port (3311 a) is communicated with the air outlet port (13 b).

15. The range hood (100) according to claim 14, wherein the widths of two adjacent sub-air outlets (3311 a) in the extending direction of the main body portion (331) are gradually increased.

16. The range hood (100) according to any one of claims 1 to 10, wherein the range hood body (10) further comprises a decorative cover (15), at least part of the fan cover (11), the fan (31) and the air chamber seat (33) are arranged in the decorative cover (15), the fume collecting hood (13) is connected below the decorative cover (15), and the decorative cover (15) is provided with an air inlet (15 a) in butt joint communication with the fan (31).