A range hood for improving the efficiency of extracting oil smoke

Abstract

The present invention discloses a range hood for improving the efficiency of oil fume absorption, comprising: a main channel housing provided with a passage opening, an air suction system connected with the main channel housing, and an air inlet housing provided with an air inlet and an air outlet; in front of the main channel housing, a plurality of air inlet housings are movably connected with the main channel housing, and each air inlet housing can rotate around the main channel housing from a stowed position to a use position; when the air inlet housing is in the use position, it corresponds to a burner of a gas stove located below it, and the air outlet is connected with the passage opening. By correspondingly arranging the air inlet housing above each burner of the gas stove, when the range hood is used, the air inlet housing is in the use position, and the oil fume can be absorbed in a targeted manner for the burner used for cooking, and the negative pressure area formed by the air inlet housing can cover the range of oil fume diffusion, thereby improving the extraction efficiency and effectively preventing the oil fume from escaping from the edge of the range hood to the kitchen space.

Description

Technical Field

[0001] The invention relates to a range hood capable of improving the efficiency of absorbing oil fumes. Background Art

[0002] The existing top-suction and side-suction range hoods, and range hoods of integrated stoves, have their smoking areas mostly concentrated in the middle above the stove. For example, an existing household gas stove generally includes two burners on the left and right, and the air intake is located above the middle of the two burners. This causes the negative pressure intensity of the negative pressure zone to gradually weaken from the middle to both sides. When cooking with one burner, the farther away from the air intake, the worse the oil fume absorption effect is, thereby reducing the smoke extraction efficiency of the range hood; the oil fume is easily diffused from both sides of the range hood into the kitchen space, affecting the air quality in the kitchen and thus affecting the health of users.

[0003] In order to solve the above problems, most of the existing solutions are to increase the size of the smoke collecting chamber, thereby forming a negative pressure zone with higher negative pressure intensity, thereby enhancing the oil fume absorption effect on the left and right sides of the range hood. However, simply increasing the size of the smoke collecting chamber, on the one hand, the degree of enhancement of the smoke absorption effect is limited, and on the other hand, the range hood is large in size, occupies a large kitchen space, is not easy to cooperate with the cabinet, and also brings inconvenience to the user when cooking. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a range hood with improved oil fume absorption efficiency, which can absorb oil fume corresponding to each burner of the gas stove and improve the oil fume absorption effect of each burner in use.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A range hood for improving oil fume extraction efficiency, comprising: a main channel shell with a passage opening, an air suction system connected to the main channel shell, and an air inlet shell with an air inlet and an air outlet; in front of the main channel shell, a plurality of the air inlet shells are movably connected to the main channel shell, and each of the air inlet shells can be rotated around the main channel shell from a stowed position to a use position; when the air inlet shell is in the use position, it corresponds to a burner of a gas stove located below it, and the air outlet is connected to the channel opening.

[0007] Furthermore, a receiving cavity having the same shape as that of the air inlet housing is provided on the main flow channel housing, and when the air inlet housing is located at the retracted position, the air inlet housing is located in the receiving cavity.

[0008] Furthermore, the range hood with improved fume extraction efficiency also includes an automatic control device, which connects the main channel housing and the air inlet housing and is used to control the air inlet housing to switch between the retracted position and the use position.

[0009] Furthermore, the air inlet shell is an annular shell with a notch, an air outlet is arranged on each end face of the notch, the air inlet is arranged on the annular inner wall of the air inlet shell, a mesh cover is arranged on the air inlet, and the mesh holes of the mesh cover are elongated holes, waist-shaped holes, diamond-shaped holes or round holes.

[0010] Furthermore, the automatic control device includes a push rod motor, a push rod and a servo motor, two extending shafts, two connecting members, and a hollow slider, wherein two slider air inlets are provided on the slider corresponding to the air outlet on each end face respectively, the servo motor is installed in the slider, one end of each of the extending shafts is fixedly connected to the output shaft on one side of the servo motor, and the other end of the extending shaft extends into the slider air outlet, and the connecting end of each of the connecting members is inserted into one of the slider air inlets and fixedly installed on one of the extending shafts at the same time; the end face of the fixed end of the connecting member is fixedly connected to the end face of the air inlet housing where the air outlet is provided, wherein a through hole connecting the air outlet and the channel opening is provided on the connecting member; the push rod motor is installed in the main channel housing, one end of the push rod is connected to the push rod motor, and the other end of the push rod is fixed to the rear end face of the slider; when the push rod pushes the slider to push the air inlet housing out of the accommodating cavity, the slider air outlet provided above the slider corresponds to the channel opening.

[0011] Furthermore, the main channel housing is provided with channel openings on both sides corresponding to the air outlets on both sides of the air inlet housing.

[0012] Furthermore, the outer accommodating surface of the accommodating cavity and the inner accommodating surface below are both concave arc-shaped surfaces that cooperate with the rotation of the air inlet shell; a concave arc-shaped net is arranged on the air inlet of the air inlet shell, and the mesh holes of the arc-shaped net are elongated holes, waist-shaped holes, diamond-shaped holes or round holes.

[0013] Furthermore, the automatic control device includes a servo motor, two extending shafts and two connecting parts, the servo motor is installed in the main channel housing, one end of each of the extending shafts is fixedly connected to the output shaft on one side of the servo motor, the other end of the extending shaft extends into the channel opening, the connecting end of each connecting part is inserted into the channel opening on one side, and is fixedly installed on one of the extending shafts; the end face of the fixed end of the connecting part is fixedly connected to the end face of the air inlet housing where the air outlet is set, wherein a through hole connecting the air outlet and the channel opening is provided on the connecting part.

[0014] Furthermore, the air suction system includes a fan and a casing, a suction port is opened on the main channel casing above the channel opening, and the fan is closed and fixed between the casing and the suction port, wherein the impeller of the fan corresponds to the suction port.

[0015] Furthermore, a baffle is provided on the air inlet housing, and when the air inlet housing is in the use position, the baffle is located on the top of the air inlet housing.

[0016] The range hood of the present invention improves the oil fume extraction efficiency by correspondingly arranging an air inlet housing above each burner of the gas stove. When the range hood is in use, the air inlet housing is in the use position, and can absorb the oil fume of the burner for cooking in a targeted manner. The negative pressure area formed by the air inlet housing can cover the range of oil fume diffusion, thereby improving the extraction efficiency and effectively preventing the oil fume from escaping from the edge of the range hood to the kitchen space. In addition, when the range hood is not in use, the air inlet housing can be rotated to the retracted position to save space.

[0017] In the preferred technical solution of the present invention, a accommodating cavity for accommodating an air inlet shell is provided on the main channel shell. When the range hood is not in use, the air inlet shell is retracted into the accommodating cavity, which not only does not occupy kitchen space but also is neat and beautiful and easy to clean. The air inlet shell and the main channel shell have good integrity.

[0018] In another preferred technical solution of the present invention, a baffle is provided on the air inlet shell. When the air inlet shell is in the use position, the baffle is located at the top of the air inlet shell. For the stove head that is cooking, it is equivalent to forming a smoke collection chamber. The baffle can prevent the oil smoke from escaping from the top of the air inlet shell and gather the oil smoke so that the oil smoke can be sucked into the air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an exploded view of embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0021] Figure 3 This is a schematic diagram of the use of Example 1 of the present invention;

[0022] Figure 4 This is a schematic diagram of the air inlet housing in the retracted state according to Embodiment 1 of the present invention;

[0023] Figure 5 This is a schematic structural diagram of an air inlet housing according to Embodiment 1 of the present invention;

[0024] Figure 6 This is a schematic diagram of the installation of the servo motor, the extension shaft, the connecting piece, the slider and the air inlet housing in Example 1 of the present invention;

[0025] Figure 7 for Figure 6 A schematic diagram of the structure of the connecting parts;

[0026] Figure 8It is a schematic diagram of the installation structure of the sliding block and the main channel housing when the sliding block is retracted in Embodiment 1 of the present invention;

[0027] Fig. 9 for Figure 8 Schematic cross-sectional view of ;

[0028] Fig.10 It is a schematic diagram of the installation structure of the slider and the main channel housing when the slider slides out in Example 1 of the present invention;

[0029] Fig.11 for Fig.10 Schematic cross-sectional view of ;

[0030] Fig.12 It is a structural schematic diagram of the front shell of the main channel housing of Example 2 of the present invention;

[0031] Fig.13 This is a schematic diagram of the movement state of the main channel housing and the air inlet housing after installation according to Embodiment 2 of the present invention;

[0032] Fig.14 for Fig.13 Schematic cross-sectional view of ;

[0033] Fig.15 It is a cross-sectional schematic diagram of another motion state after the main flow channel housing and the air inlet housing of Embodiment 2 of the present invention are installed;

[0034] Fig.16 for Fig.15 Schematic cross-sectional view of ;

[0035] Fig.17 This is a schematic diagram of the main channel housing and the air inlet housing in the use state of embodiment 3 of the present invention;

[0036] Fig.18 for Fig.17 Another schematic diagram of the posture structure;

[0037] In the figure:

[0038] 1—fan; 2—housing;

[0039] 3—air inlet housing; 301—air inlet; 302—air outlet; 303—baffle; 304—cover plate;

[0040] 4—main channel housing; 401—air inlet; 402—front housing; 403—rear housing; 404—accommodation cavity; 405—channel opening

[0041] 5—slider; 501—slider air inlet; 502—slider cover; 503—slider air outlet;

[0042] 6—connector; 601—socket; 602—connection end; 603—fixed end; 604—through hole;

[0043] 7—push rod motor assembly; 701—push rod motor; 702—push rod;

[0044] 8—servo motor assembly; 801—servo motor; 802—extending shaft. DETAILED DESCRIPTION

[0045] In order to clearly illustrate the design concept of the present invention, the present invention is described below in conjunction with examples.

[0046] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention is clearly and completely described below in conjunction with the drawings in the examples of the present invention. Obviously, the described examples are only part of the examples of the present invention, not all of the examples. Based on the examples in the present invention, all other implementation methods obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of the present invention.

[0047] In the description of this embodiment, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0048] An example of the present invention provides a range hood for improving the efficiency of extracting oil fumes, comprising: a main channel shell with a passage opening, an air suction system connected to the main channel shell, and an air inlet shell with an air inlet and an air outlet; in front of the main channel shell, a plurality of air inlet shells are movably connected to the main channel shell, and the air inlet shells can be rotated around the main channel shell from a stowed position to a use position; when each air inlet shell is in the use position, it corresponds to a burner of a gas stove located below it, and the air outlet is connected to the channel opening.

[0049] In this example, the range hood that improves the efficiency of oil fume extraction is provided with an air inlet housing above each burner of the gas stove. When the range hood is in use, the air inlet housing is in the use position, and can absorb the oil fume of the burner in a targeted manner. The negative pressure area formed by the air inlet housing can cover the range of oil fume diffusion, improve the extraction efficiency, and effectively prevent the oil fume from escaping from the edge of the range hood into the kitchen space. In addition, when the range hood is not in use, the air inlet housing can be rotated to the retracted position to save space.

[0050] In this example, the oil fume path is: the oil fume enters the cavity of the air inlet shell from the air inlet of the air inlet shell, enters the channel opening of the main channel shell from the air outlet of the air inlet shell, and then enters the main channel shell, and is discharged to the outside through the fan system connected to the main channel shell.

[0051] In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. In order to more clearly explain the technical solution in the present invention, the present invention will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

[0052] Example 1

[0053] like Figure 1-10 As shown in FIG. 1 , a first embodiment of a range hood for improving the efficiency of extracting oil smoke of the present invention is shown. The range hood comprises: a main channel housing 4 provided with a channel opening 405, an air suction system connected to the main channel housing 4, and an air inlet housing 3 provided with an air inlet 301 and an air outlet 302; wherein, as Figure 8 and Fig.10 As shown, the main channel housing 4 is assembled from a front housing 402 and a rear housing 403, and the front housing 402 and the rear housing 403 can be connected by threads. In front of the front housing 402 of the main channel housing 4, a plurality of air inlet housings 3 are movably connected to the front housing 402 of the main channel housing 4, and the air inlet housings 3 can rotate around the front housing 402 of the main channel housing 4 from a stowed position to a use position; the range hood of this embodiment includes two symmetrical air inlet housings 3, such as Figure 3 As shown, when each air inlet housing 3 is in the use position, it corresponds to a burner of the gas stove located below it, and the air outlet 302 is connected to the channel opening 405.

[0054] like Figure 1 , Fig. 9 , Fig.11 As shown, the air suction system of this embodiment includes a fan 1 and a housing 2, a suction port 401 is provided on a front shell 402 of a main channel housing 4 above a channel opening 405, and the fan 1 is sealed and fixed between the housing 2 and the suction port 401, wherein the impeller of the fan 1 corresponds to the suction port 401. Through the rotation of the fan 1, negative pressure is generated in the main channel housing 4, so that the air inlet 301 of the air inlet housing 3 can absorb oil smoke.

[0055] like Figure 5 As shown, the air inlet housing 3 is an annular housing with a notch, and an air outlet 302 is arranged on each end face of the notch, and an air inlet 301 is arranged on the annular inner wall of the air inlet housing, and the air inlet housing 3 includes a cover plate 304 buckled on the upper part thereof, so as to facilitate the split molding of the air inlet housing 3. The cover plate 304 in this embodiment is a flat plate with the same shape as the air inlet housing 3, and a mesh cover is arranged on the air inlet of the air inlet housing 3, and the mesh holes of the mesh cover can be elongated holes, waist-shaped holes, diamond-shaped holes or round holes.

[0056] A receiving cavity 404 having the same shape as the air inlet housing 3 is disposed on the front shell 402 of the main channel housing 4 . When the air inlet housing 3 is located at the retracted position, the air inlet housing 3 is located in the receiving cavity 404 .

[0057] The range hood in this embodiment further includes an automatic control device, which connects the front shell 402 of the main channel shell 4 and the air inlet shell 3, and is used to control the air inlet shell 3 to switch between the retracted position and the use position. Figure 2 and Figure 4 As shown, the automatic control device includes a push rod motor 701, a push rod 702 and a servo motor 801, two extension shafts 802, two connecting pieces 6, and a hollow slider 5, wherein the motor 701 and the push rod 702 form a push rod motor assembly 7, and the servo motor 801 and the extension shaft 802 form a servo motor assembly 8. Figure 8-11 As shown, the slider 5 includes a slider cover plate 502 which is buckled on its upper end surface to facilitate the split molding of the slider 5. Based on the consideration of facilitating the split molding, the slider cover plate 502 can also be set on other end surfaces, but when it is set on the upper end surface of the slider 5, it is not easy to fall off, and it can prevent the slider cover plate 5 from having a covering gap, thereby preventing the oil smoke from escaping from the gap; two slider air inlets 501 corresponding to the air outlets 302 on each end surface of the air inlet shell 3 are set on the slider 5, and the servo motor 801 is installed in the slider 5, and one end of each protruding shaft 802 is fixedly connected to the output shaft on one side of the servo motor 801, and the connecting end 602 of each connecting member 6 is inserted into a slider air inlet 501 and fixedly installed on a protruding shaft 802; the end surface of the fixed end 603 of the connecting member 6 is fixedly connected to the end surface of the air inlet shell 3 where the air outlet 302 is set, wherein the connecting member 6 is provided with a through hole 604 connecting the air outlet 302 and the channel opening 405; specifically, as Figure 6-7 As shown, the cross-section of the extending shaft 802 is rectangular, and accordingly, a rectangular socket 601 that cooperates with the extending shaft 802 is opened in the middle of the connecting member 6, the air inlet 501 of the slider is a circular opening, the connecting end 602 of the connecting member 6 is cylindrical, the fixed end 603 of the connecting member 6 is a rectangular platform, and the area of ​​the end face of the fixed end 603 is larger than the area of ​​the end face of the connecting end 602, the connecting end 602 is integrally connected with the fixed end 603, the end face of the fixed end 603 and the end face of the air inlet shell 3 where the air outlet 302 is set can be connected by welding or by screws, and four through holes 604 are symmetrically arranged on the connecting member 6, and the connecting plate between adjacent through holes 604 is used to connect the socket 601, and the connecting plate also provides support for the connection between the connecting end 602 and the fixed end 603.

[0058] The push rod motor 701 is installed in the main channel housing 4, one end of the push rod 702 is connected to the push rod motor 701, and the other end of the push rod 702 is fixed to the rear end surface of the slider 5; when the push rod 702 pushes the slider 5 to push the air inlet housing 3 out of the accommodating cavity 404, the slider air outlet 503 arranged above the slider 5 corresponds to the channel opening 405. The push rod 702 and the rear end surface of the slider 5 can be fixed by respectively opening threaded holes on the rear end surfaces of the push rod 702 and the slider 5, and fixing the push rod 702 and the slider 5 from the inner side of the rear end surface of the slider 5 by screws or bolts.

[0059] There are many steps for installing the automatic control device of this embodiment, and only one of them is provided here: open the slider cover 502, install the servo motor 801 into the slider 5, and in order to facilitate the installation and fixation of the servo motor 801, a fixing frame (not shown in the figure) can be set in the slider 5, and then the two extension shafts 802 are respectively fixed to the two ends of the output shaft of the servo motor 801, and the other end of the extension shaft 802 extends to the center of the slider air inlet 501, and the connector 6 is installed. After installing the air inlet housing 3, the connector The end face of the fixed end 603 of the connecting member 6 is fixedly connected to the end face of the air inlet housing 3 where the air outlet 302 is arranged, which is equivalent to the fixed connection between the connecting member 6 and the air inlet housing 3. Then, the connected slider 5 and the air inlet housing 3 are installed with the front shell 402 of the main channel housing 4, one end of the push rod 702 is fixedly connected to the push rod motor 701, and the other end of the push rod 702 is fixedly connected to the rear end face of the slider 5 installed in the front shell 402, and then the push rod motor 701 is installed in the rear shell 403, and finally the slider cover 502 is covered. In order to facilitate the installation of the push rod motor 701, an installation window can be opened on the rear shell 403. After the push rod motor 701 is installed, the rear shell 403 is closed by a thin plate matching the window.

[0060] In this embodiment, the process of the automatic control device controlling the air inlet housing 3 to switch between the use position and the retracted position is as follows: when the range hood is not in use, the air inlet housing 3 is located in the accommodating cavity 404 of the front shell 402 of the main channel housing 4; when the range hood needs to be used, a command is issued by the range hood control panel to control the push rod motor 701 to push the slider 5 and the air inlet housing 3 out of the accommodating cavity 404. Fig.11As shown, at this time, a part of the slider 5 slides out of the accommodating cavity 404, and the channel opening 405 is connected with the slider air outlet 503; the servo motor 801 drives the air inlet shell 3 to rotate, and when the air inlet shell 3 rotates to the use position, the use position in this embodiment is the position where the air inlet shell 3 is perpendicular to the accommodating cavity 404 of the front shell, the servo motor 801 stops rotating, the air inlet shell 3 corresponds to the gas stove burner head working below it, and the fan 1 of the range hood starts to rotate and work, and the oil smoke is sucked into the air inlet 301 of the air inlet shell 3, and the oil smoke passes through the air outlet 302, the slider air inlet 501, the slider air outlet 503, and the channel opening 405, and then enters the main channel shell 4, and finally, is discharged into the public flue. When the range hood is used up, the fan 1 is stopped, and the servo motor 801 drives the air inlet housing 3 to rotate. When the air inlet housing 3 rotates to the stowed position, in this embodiment, the air inlet housing 3 is parallel to the accommodating chamber 404, the servo motor 801 stops rotating, and the push rod motor 701 drives the slider 5 and the air inlet housing 3 to be pulled into the accommodating chamber 404. Fig. 9 As shown, the slider 5 is retracted, and the passage opening 405 is staggered with the slider air outlet 503 to prevent the oil smoke from flowing back into the room through the slider 5. The air inlet housing 3 and the slider 5 are both retracted, which not only does not occupy the kitchen space, but also is neat and beautiful, easy to clean, and the air inlet housing 3, the slider 5 and the main channel housing 4 have good integrity.

[0061] In this embodiment, the air inlet housings 3 on the left and right sides can be used simultaneously or separately, and the usage is flexible.

[0062] Example 2

[0063] like Figure 12-16 As shown, it is a second embodiment of the range hood for improving the range hood extraction efficiency of the present invention. This embodiment is an improvement based on the embodiment 1, and the difference from the embodiment 1 is that:

[0064] like Fig.12 As shown, the front shell 402 of the main channel housing 4 is provided with channel openings 405 on both sides corresponding to the air outlets 302 on both sides of the air inlet housing 3 .

[0065] The automatic control device in this embodiment includes a servo motor 801, two extending shafts 802 and two connecting members 6, wherein the servo motor 801 and the extending shafts 802 constitute a servo motor assembly 8, the servo motor 801 is installed in the main channel housing, one end of each extending shaft 802 is fixedly connected to the output shaft on one side of the servo motor 801, and the other end of the extending shaft 802 extends into the channel opening 405, and the connecting end 602 of each connecting member 6 is inserted into the channel opening 405 on one side and fixedly installed on one extending shaft 802; the end face of the fixed end 603 of the connecting member 6 is fixedly connected to the end face of the air inlet housing 3 where the air outlet 302 is set, wherein a through hole 604 connecting the air outlet 302 and the channel opening 405 is opened on the connecting member 6.

[0066] The structure and installation method of the servo motor 801, the two extended shafts 802 and the two connecting members 6 in this embodiment are the same as those in the embodiment 1, except that the servo motor assembly 8 is directly installed in the front shell 402 of the main channel housing 4, and the connecting end 602 of the connecting member 6 is directly inserted into the channel opening 405. The axis of the channel opening 405 is perpendicular to the axis of the air suction port 401.

[0067] In this embodiment, the process of the automatic control device controlling the switching of the air inlet housing 3 between the use position and the stowed position is as follows: when the range hood is not in use, the air inlet housing 3 is located in the accommodating chamber 404 of the front shell 402 of the main channel housing 4; when the range hood needs to be used, a command is issued by the control panel of the range hood, and the servo motor 801 drives the air inlet housing 3 to rotate; when the air inlet housing 3 rotates to the use position, the use position in this embodiment is the position where the air inlet housing 3 is perpendicular to the accommodating chamber 404 of the front shell, the servo motor 801 stops rotating, the air inlet housing 3 corresponds to the gas stove burner head working below it, the fan 1 of the range hood starts to rotate, and the oil smoke is sucked in from the air inlet 301 of the air inlet housing 3, and the oil smoke passes through the air outlet 302, the slider air inlet 501, the slider air outlet 503, and the channel opening 405, and then enters the main channel housing 4, and finally, is discharged into the common flue. When the range hood is used up and the fan 1 is stopped, the servo motor 801 drives the air inlet housing 3 to rotate, and the air inlet housing 3 rotates to the stowed position. In the stowed position in this embodiment, the air inlet housing 3 is parallel to the accommodating chamber 404. The air inlet housing 3 is stowed in the accommodating chamber 404, which does not occupy the kitchen space, is neat and beautiful, and is easy to clean. The air inlet housing 3 and the main channel housing 4 have good integrity.

[0068] In order to achieve the above effect, it is necessary to prevent the air inlet housing 4 from interfering when rotating between the stowed position and the use position. Figure 13-16As shown, the outer accommodating surface of the accommodating cavity 404 and the inner accommodating surface below are both concave arc surfaces that cooperate with the rotation of the air inlet shell 3; similarly, a concave arc net is set on the air inlet 301 of the air inlet shell 3, and the mesh holes of the arc net can be long holes, waist-shaped holes, diamond holes or round holes.

[0069] Example 3

[0070] like Figure 17-18 As shown, it is a third embodiment of the range hood for improving the range hood extraction efficiency of the present invention. This embodiment is an improvement based on the embodiment 1 or the embodiment 2, and the difference from the embodiment 1 or the embodiment 2 is that:

[0071] The air inlet housing 3 is provided with a baffle 303, which is made integrally with the cover plate 304 in this embodiment. When the air inlet housing 3 is in the use position, the baffle 303 is located at the top of the air inlet housing 3. The baffle 303 provided on the air inlet housing 3 blocks the rise of oil smoke when the air inlet housing 3 is in the use position. For the stove head being cooked, it is equivalent to forming a smoke collecting cavity with the same shape as the air inlet housing 3. The baffle 303 can prevent the oil smoke from escaping from the top of the air inlet housing and gather the oil smoke so that the oil smoke is sucked from the air inlet 301.

[0072] The air inlet housing 3 in this embodiment can also be used independently. Figure 17-18 As shown, the air inlet housing 3 on the left is not in use, and the air inlet housing 3 on the right is in use.

[0073] It should be noted that, in addition to the specific examples given above, some of the structures may have different options. For example, the baffle may be made separately from the cover plate, so that the baffle can be removed when not in use, or when the air inlet housing is in the retracted position, the baffle may be buckled on the surface of the air inlet housing, so that the air inlet housing and the main channel housing still have good integrity, which is convenient for cleaning; etc., and these are all made by those skilled in the art based on their basic skills based on their understanding of the concept of the present invention, so they will not be listed here one by one.

[0074] Finally, it is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the principles and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A range hood for improving the efficiency of extracting oil fumes, characterized in that: include: A main channel housing (4) provided with a passage opening (405), an air suction system connected to the main channel housing (4), an air inlet housing (3) provided with an air inlet (301) and an air outlet (302), and an automatic control device; in front of the main channel housing (4), a plurality of the air inlet housings (3) are movably connected to the main channel housing (4), and each of the air inlet housings (3) can rotate around the main channel housing (4) from a stowed position to a use position; when the air inlet housing (3) is in the use position, it corresponds to a burner of a gas stove located below it, and the air outlet (302) is connected to the passage opening (405); The main flow channel housing (4) is provided with a receiving cavity (404) of the same shape as the air inlet housing; when the air inlet housing (3) is located at the retracted position, the air inlet housing (3) is located in the receiving cavity (404); the automatic control device connects the main flow channel housing (4) and the air inlet housing (3) and is used to control the air inlet housing (3) to switch between the retracted position and the use position; The air inlet housing (3) is an annular housing with a notch, and an air outlet (302) is arranged on each end face of the notch. The air inlet (301) is arranged on the annular inner wall of the air inlet housing. A mesh cover is arranged on the air inlet, and the mesh holes of the mesh cover are elongated holes, waist-shaped holes, diamond-shaped holes or round holes. The automatic control device comprises a push rod motor (701), a push rod (702) and a servo motor (801), two extending shafts (802), two connecting members (6), and a hollow slider (5). The slider (5) is provided with two slider air inlets (501) corresponding to the air outlets on each end face, respectively. The servo motor (801) is installed in the slider (5), and one end of each extending shaft (802) is fixedly connected to an output shaft on one side of the servo motor (801), and the other end of the extending shaft (802) extends into the slider air outlet (503). Each connecting member The connecting end (602) of the connecting member (6) is inserted into one of the slider air inlets (501) and is fixedly mounted on one of the extending shafts (802); the end face of the fixed end (603) of the connecting member (6) is fixedly connected to the end face of the air inlet housing (3) on which the air outlet (302) is arranged, wherein a through hole (604) is provided on the connecting member (6) to connect the air outlet (302) and the channel opening (405); the push rod motor (701) is installed in the main channel housing (4), one end of the push rod (702) is connected to the push rod motor (701), and the other end of the push rod (702) is fixed to the rear end face of the slider (5); when the push rod (702) pushes the slider to push the air inlet housing (3) out of the accommodating cavity (404), the slider air outlet (503) arranged above the slider (5) corresponds to the channel opening (405).

2. The range hood according to claim 1, characterized in that: The air suction system comprises a fan (1) and a housing (2); an air suction port (401) is provided on the main channel housing (4) above the channel opening (405); the fan (1) is sealed and fixed between the housing (2) and the air suction port (401), wherein an impeller of the fan corresponds to the air suction port (401).

3. The range hood according to claim 1, characterized in that: The air inlet housing (3) is provided with a baffle (303); when the air inlet housing (3) is in a use position, the baffle (303) is located at the top of the air inlet housing (3).

4. The range hood according to claim 1, characterized in that: The air inlet housing (3) comprises a cover plate (304) buckled over the upper portion thereof, wherein the cover plate (304) is a flat plate having the same shape as the air inlet housing (3).

5. The range hood according to claim 1, characterized in that: The slider (5) comprises a slider cover plate (502) buckled onto the upper end surface thereof.

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