Range hood

Abstract

The range hood comprises a shell and a smoke barrier, an air inlet is formed in the shell, a rotating shaft is arranged on the smoke barrier, the smoke barrier comprises a first smoke barrier part and a second smoke barrier part which are located on the two sides of the rotating shaft correspondingly, the smoke barrier is rotationally installed at the air inlet around the rotating shaft, and when the smoke barrier rotates to the closing position, the air inlet is closed; when the smoke baffle rotates to the balance position, the air inlet is opened, the first smoke baffle part and the edge of one side of the air inlet are arranged at an interval and form a first inlet in a surrounding mode, and the second smoke baffle part and the edge of the other side of the air inlet are arranged at an interval and form a second inlet in a surrounding mode; the smoke barrier is obliquely arranged relative to the height direction X of the extractor hood, the height of the second smoke barrier part is larger than that of the first smoke barrier part, and the inclination degree of the smoke barrier relative to the height direction X of the extractor hood is gradually increased along with switching of the smoke barrier from the closed position to the balance position. The range hood provided by the invention can prevent the smoke baffle from blocking the sight of a user and can reduce outward escape of oil smoke.

Description

[0001] Related Applications

[0002] This application claims priority to Chinese patent application filed on July 12, 2024, with application number 2024109359795 and invention name “Ranger Hood”, the contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of range hoods, and in particular to a range hood. Background Art

[0004] For side-suction range hoods commonly seen on the market, a common fan placement method is that the fan smoke inlet is parallel to the wall on which the range hood is placed, and the front and rear sides of the fan can achieve double-sided air intake. In order to better match the front and rear double-sided air intake method of the fan, a feasible method is to set two front and rear air inlets on the lower side smoke collecting hood, and a rotatable smoke baffle is provided to block the air inlet when the range hood is turned off. The conventional smoke baffle setting method is to set the rotating shaft at the outermost side of the air inlet, such as Chinese patent CN218583239U. When the range hood is working, the smoke baffle is flipped outward and opened. A problem with this is that the flipped-open smoke baffle is easy to block the user's line of sight and interfere with the user's operation during cooking, causing great inconvenience to the user. However, if no smoke baffle is provided here, on the one hand, when the range hood is turned off, the air inlet is not blocked and the aesthetics is poor. On the other hand, the oil smoke here is very easy to escape when the range hood is working. Summary of the invention

[0005] Based on this, it is necessary to provide a range hood that can facilitate opening or closing the air inlet while preventing the smoke baffle from blocking the user's view or interfering with the user's cooking experience, and can reduce the escape of oil smoke.

[0006] A range hood, the range hood comprises a shell and a smoke shield, the shell is provided with an air inlet, the smoke shield is provided with a rotating shaft, and the smoke shield comprises a first smoke shield part and a second smoke shield part respectively located on both sides of the rotating shaft, the smoke shield is rotatably installed at the air inlet around the rotating shaft, and the smoke shield has a closed position and a balanced position, wherein, when the smoke shield is rotated to the closed position, the air inlet is closed; when the smoke shield is rotated to the balanced position, the air inlet is opened, and the first smoke shield part is flipped toward the inside of the shell relative to the air inlet to be spaced and surrounded with one side edge of the air inlet to form a first inlet, and the second smoke shield part is flipped toward the outside of the shell relative to the air inlet to be spaced and surrounded with the other side edge of the air inlet to form a second inlet; the smoke shield is tilted relative to a height direction X of the range hood, and the height of the second smoke shield part is greater than that of the first smoke shield part, and as the smoke shield switches from the closed position to the balanced position, the inclination degree of the smoke shield relative to the height direction X of the range hood gradually increases.

[0007] In one embodiment, the housing is provided with an air guide plate, which extends from an edge of one side of the air inlet close to the second smoke shield toward the outside of the housing and expands outward relative to the air inlet, and is used to guide the oil smoke into the second inlet. It is understandable that, in this arrangement, the air guide plate can play the effect of gathering the oil smoke toward the second inlet.

[0008] In one embodiment, the housing further comprises an extension plate, which is slidably connected to the air guide plate along the extension direction of the air guide plate, and has a retracted position and an extended position. When the extension plate is in the retracted position, the extension plate is located on the surface of the air guide plate; when the extension plate is in the extended position, the extension plate can extend out of the end of the air guide plate away from the air inlet. It can be understood that, in such a configuration, when the extension plate is in the extended position, the extension plate can play the role of extending the air guide plate.

[0009] In one embodiment, when the extension plate is in the maximum extension position, the extension plate and the air guide plate are connected without a gap. It is understandable that such a configuration can prevent oil smoke from escaping from the gap between the extension plate and the air guide plate, thereby affecting the oil smoke absorption effect.

[0010] In one embodiment, the range hood further comprises a connecting structure, the connecting structure connecting the second smoke shield and the extension plate; wherein, as the smoke shield rotates around the rotation axis, the second smoke shield can drive the extension plate to slide relative to the air guide plate through the connecting structure. It can be understood that such a configuration enables the second smoke shield to be linked with the extension plate, thereby eliminating the need to separately provide a driving mechanism to drive the extension plate to slide relative to the air guide plate.

[0011] In one embodiment, the connection structure includes a connecting rod and a slider, one end of the connecting rod is hinged to the second smoke barrier, and the other end is hinged to the extension plate; the slider is fixedly mounted on the extension plate, the air guide plate is provided with a guide rail, and the slider is slidably connected to the guide rail.

[0012] In one embodiment, the air guide plate is provided with a through hole, the guide rail is located on the side of the air guide plate away from the extension plate, and is provided with a slide slot, the slide slot is connected to the through hole through its opening, and a limiting step is provided at the opening of the slide slot; one end of the slider is slidably installed in the slide slot and stopped at the limiting step, and the other end extends out of the through hole and is fixedly connected to the extension plate. It can be understood that in such a configuration, the limiting step is used to prevent the slider from escaping from the slide slot through the opening. Among them, the hinge seat and the slider are respectively connected to the two sides of the extension plate that are away from each other.

[0013] In one embodiment, when the smoke shield is rotated to the equilibrium position, the second smoke shield does not extend out of the air guide plate along the thickness direction Y of the range hood. It can be understood that, in this arrangement, the air guide plate can also prevent the oil smoke inside the housing from escaping from the second inlet to the outside of the housing.

[0014] In one embodiment, the range hood further includes a fan, which is installed inside the shell, the surface area of ​​the first smoke barrier is larger than the surface area of ​​the second smoke barrier, and the center of gravity of the smoke barrier is located at the first smoke barrier; when the smoke barrier is in a closed position and the fan provides suction wind force toward the inside of the shell, the smoke barrier can rotate around the shaft to a balanced position and stop rotating at the balanced position to keep the air inlet open, and when the suction wind force disappears, the smoke barrier can fall back to the closed position under the action of its own gravity. It can be understood that, with such a configuration, the smoke barrier can automatically open or close the air inlet by utilizing the suction wind force provided by the fan without the need for an additional drive device, and the cost is relatively low.

[0015] In one embodiment, a first limit plate and a second limit plate are respectively provided at opposite ends of the air inlet, and when the smoke shield is in the closed position, along the height direction X of the range hood, the first limit plate stops below the first smoke shield, and the second limit plate stops above the second smoke shield. It can be understood that such a configuration enables the smoke shield to remain in the closed position without rotating around the rotating shaft under the action of its own gravity.

[0016] Compared with the form in which the smoke shield is flipped around one side edge of itself toward the outside of the shell in the related structure, the range hood provided by the present application, as the smoke shield rotates from the closed position to the balanced position, the first smoke shield part flips around the rotation axis toward the inside of the shell, and the second smoke shield part flips around the rotation axis toward the outside of the shell, that is, only the second smoke shield part extends out of the air inlet, so that the volume of the smoke shield extending out of the air inlet is relatively small, which is conducive to avoiding the extended smoke shield from blocking the user's line of sight or interfering with the user's cooking. In addition, along the height direction X of the range hood, when the oil smoke rises from the bottom to the outer surface of the smoke shield, it will be divided into two paths along the outer surface of the smoke shield, wherein one path of oil smoke enters the inside of the shell through the first inlet, and the other path of oil smoke enters the inside of the shell through the second inlet. That is, the smoke shield has the function of rectification and buffering, which is conducive to improving the oil smoke absorption effect. Furthermore, as the smoke baffle switches from the closed position to the balanced position, the inclination of the smoke baffle relative to the range hood height direction X gradually increases, that is, as the smoke baffle switches from the closed position to the balanced position, the slope of the smoke baffle becomes smaller and becomes more gentle. This will weaken the wall-attached guide effect of the smoke baffle on the oil smoke entering the shell from the first inlet, making it difficult for this part of the oil smoke to flow upward along the smoke baffle and escape from the second inlet to the outside of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 An axonometric view of the range hood provided for this application;

[0019] Figure 2 A front view of the range hood provided for this application;

[0020] Figure 3 for Figure 2 A cross-sectional view of the range hood at AA when the smoke baffle is in a closed position;

[0021] Figure 4 for Figure 2 A cross-sectional view of the range hood at AA when the smoke baffle is in an open position;

[0022] Figure 5 for Figure 4 A partial schematic diagram from another perspective;

[0023] Figure 6 for Figure 4 A partial schematic diagram from another perspective.

[0024] 1. The range hood is provided with a plurality of air inlets, a plurality of air inlets and a plurality of air inlets as defined in the present invention. The plurality of air inlets are provided with a plurality of air inlets as defined in the present invention. The plurality of air inlets are provided with a plurality of air inlets as defined in the present invention. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0030] See also Figures 1 to 4The present application provides a range hood 100, which includes a housing 10 and a smoke shield 20. The housing 10 is provided with an air inlet 11. A rotating shaft 30 is provided on the smoke shield 20, and the smoke shield 20 includes a first smoke shield portion 21 and a second smoke shield portion 22 respectively located on both sides of the rotating shaft 30. The smoke shield 20 is rotatably installed on the air inlet 11 around the rotating shaft 30, and the smoke shield 20 has a closed position and a balanced position, wherein when the smoke shield 20 is rotated to the closed position, the air inlet 11 is closed; when the smoke shield 20 is rotated to the balanced position, the air inlet 11 is opened, and the first smoke shield portion 21 is turned toward the inside of the housing 10 relative to the air inlet 11 to be spaced and surrounded by one side edge of the air inlet 11 to form a first inlet 113, and the second smoke shield portion 22 is turned toward the outside of the housing 10 relative to the air inlet 11 to be spaced and surrounded by the other side edge of the air inlet 11 to form a second inlet 114. The smoke baffle 20 is inclined relative to the height direction X of the range hood 100, and the height of the second smoke baffle 22 is greater than the height of the first smoke baffle 21. As the smoke baffle 20 switches from the closed position to the balanced position, the inclination of the smoke baffle 20 relative to the height direction X of the range hood 100 gradually increases.

[0031] It can be understood that, compared with the form in which the smoke baffle 20 is turned around one side edge of itself toward the outside of the shell 10 and opened in the related structure, the range hood 100 provided by the present application, as the smoke baffle 20 rotates from the closed position to the balanced position, the first smoke baffle 21 turns around the rotating shaft 30 toward the inside of the shell 10, and the second smoke baffle 22 turns around the rotating shaft 30 toward the outside of the shell 10, that is, only the second smoke baffle 22 extends out of the air inlet 11, so that the volume of the smoke baffle 20 extending out of the air inlet 11 is relatively small, which is conducive to avoiding the smoke baffle 20 from blocking the user's sight or interfering with the user's cooking operation. In addition, along the height direction X of the range hood, when the oil smoke rises from the bottom to the outer surface of the smoke baffle 20, it will be divided into two paths along the outer surface of the smoke baffle 20, one of which enters the inside of the shell 10 through the first inlet 113, and the other enters the inside of the shell 10 through the second inlet 114. That is, the smoke baffle 20 has the function of rectifying and buffering, which is conducive to improving the oil smoke absorption effect. Furthermore, as the smoke baffle 20 switches from the closed position to the balanced position, the inclination of the smoke baffle 20 relative to the height direction X of the range hood 100 gradually increases, that is, as the smoke baffle 20 switches from the closed position to the balanced position, the slope of the smoke baffle 20 becomes smaller and becomes more gentle. This will weaken the wall-attachment diversion effect of the smoke baffle 20 on the oil smoke entering the interior of the shell 10 from the first inlet 113, making it difficult for this part of the oil smoke to flow upward along the smoke baffle 20 and escape from the second inlet 114 to the outside of the shell 10.

[0032] like Figure 3As shown, the housing 10 is provided with an air guide plate 12, which extends from an edge of one side of the air inlet 11 close to the second smoke shield 22 toward the outside of the housing 10, and is outwardly expanded relative to the air inlet 11. Preferably, the air guide plate 12 is arranged at an obtuse angle with the surface where the air inlet 11 is located, such as 135 degrees, and the air guide plate 12 is used to guide the oil smoke into the second inlet 114. That is, the air guide plate 12 can play the effect of gathering the oil smoke toward the second inlet 114.

[0033] Among them, Figure 4 As shown, when the smoke shield 20 rotates to the equilibrium position, along the thickness direction Y of the range hood, the second smoke shield 22 does not extend out of the air guide plate 12. Combined with the fact that the air guide plate 12 extends from the side edge of the air inlet 11 close to the second smoke shield 22 toward the outside of the housing 10 and expands outward relative to the air inlet 11, it can be seen that the air guide plate 12 can also prevent the oil smoke inside the housing 10 from escaping from the second inlet 114 to the outside of the housing 10.

[0034] Furthermore, if Figure 3 and Figure 4 As shown, the housing 10 further includes an extension plate 13, which is slidably connected to the air guide plate 12 along the extension direction of the air guide plate 12, and the extension plate 13 has a retracted position and an extended position. When the extension plate 13 is in the retracted position, the extension plate 13 is located on the surface of the air guide plate 12; when the extension plate 13 is in the extended position, the extension plate 13 can extend out of the end of the air guide plate 12 away from the air inlet 11. When the extension plate 13 is in the maximum extended position, the extension plate 13 is seamlessly connected to the air guide plate 12, that is, the extension plate 13 is seamlessly spliced ​​with the air guide plate 12 in the extension direction of the air guide plate 12, thereby preventing oil smoke from escaping from the gap between the extension plate 13 and the air guide plate 12, affecting the oil smoke absorption effect. It is understandable that when the extension plate 13 is in the extended position, the extension plate 13 can extend the air guide plate 12, thereby improving the effect of gathering the oil smoke toward the second inlet 114, and further blocking the oil smoke inside the shell 10 from escaping from the second inlet 114 to the outside of the shell 10.

[0035] See also Figures 3 to 5 The range hood further comprises a connecting structure 40, which connects the second smoke shield 22 and the extension plate 13; wherein, as the smoke shield 20 rotates around the rotating shaft 30, the second smoke shield 22 can drive the extension plate 13 to slide relative to the air guide plate 12 through the connecting structure 40. By providing the connecting structure 40, the second smoke shield 22 can be linked with the extension plate 13, so that there is no need to separately provide a driving mechanism to drive the extension plate 13 to slide relative to the air guide plate 12.

[0036] Specifically, when the smoke shield 20 is in the closed position, the extension plate 13 is in the retracted position; when the smoke shield 20 is in the balanced position, the extension plate 13 is in the extended position. In this way, when the second inlet 114 is opened, the extension plate 13 is extended, and when the second inlet 114 is closed, the extension plate 13 is hidden under the wind guide plate 12.

[0037] The connecting structure 40 includes a connecting rod 41 and a slider 42. One end of the connecting rod 41 is hinged to the second smoke shield 22, and the other end is hinged to the extension plate 13. The slider 42 is fixedly installed on the extension plate 13. The wind guide plate 12 is provided with a guide rail 131. The slider 42 is slidably connected to the guide rail 131.

[0038] A hinge seat 43 is respectively provided on the second smoke shielding portion 22 and the extension plate 13 , and two ends of the connecting rod 41 are respectively hinged to two corresponding hinge seats 43 .

[0039] Furthermore, if Figure 6 As shown, the air guide plate 12 is provided with a through hole 121, and the guide rail 131 is located on the side of the air guide plate 12 away from the extension plate 13, and is provided with a slide groove 132, the slide groove 132 is connected to the through hole 121 through its own opening 133, and a limiting step 134 is provided at the opening 133 of the slide groove 132; one end of the slider 42 is slidably installed in the slide groove 132, and is stopped at the limiting step 134, and the other end extends out of the through hole 121 and is fixedly connected to the extension plate 13. The limiting step 134 is used to prevent the slider 42 from escaping from the slide groove 132 through the opening 133. Among them, the hinge seat 43 and the slider 42 are respectively connected to the two sides of the extension plate 13 that are away from each other.

[0040] Alternatively, if Figure 6 As shown, along the height direction X of the range hood, the extension plate 13 and the air guide plate 12 are spaced apart and surrounded to form a small assembly gap 14. That is, the extension plate 13 and the air guide plate 12 do not contact each other, thereby avoiding friction resistance between the extension plate 13 and the air guide plate 12.

[0041] like Figure 3 and Figure 4 As shown, the range hood 100 also includes a fan 50, which is installed inside the shell 10, the surface area of ​​the first smoke barrier 21 is greater than the surface area of ​​the second smoke barrier 22, and the center of gravity of the smoke barrier 20 is located at the first smoke barrier 21; when the smoke barrier 20 is in a closed position and the fan 50 provides a suction wind force toward the inside of the shell 10, the smoke barrier 20 can rotate around the rotating shaft 30 to a balanced position and stop rotating at the balanced position to keep the air inlet 11 open, and when the suction wind force disappears, the smoke barrier 20 can fall back to the closed position under the action of its own gravity.

[0042] It is understandable that when the smoke shield 20 is in the closed position and the fan 50 provides suction wind force toward the inside of the housing 10, the pressure inside the smoke shield 20 is less than the pressure outside, so that the first smoke shield 21 and the second smoke shield 22 are both subjected to pressure directed to the inside of the housing 10. Since the surface area of ​​the first smoke shield 21 is larger than the surface area of ​​the second smoke shield 22, the pressure F1 on the first smoke shield 21 is greater than the pressure F2 on the second smoke shield 22. Under the pressure difference between the first smoke shield 21 and the second smoke shield 22, the smoke shield 20 rotates around the rotation axis 30, thereby opening the air inlet 11. Specifically, the first smoke shield 21 rotates around the rotation axis 30 toward the inside of the housing 10, and the second smoke shield 22 rotates around the rotation axis 30 toward the outside of the housing 10. Until the smoke shield 20 rotates to the equilibrium position, at this time, the torque of the first smoke shield 21 subjected to the pressure F1, the second smoke shield 22 subjected to the pressure F2 and the smoke shield 20's own gravity G is balanced, so that the smoke shield 20 can stop rotating at the equilibrium position and keep the air inlet 11 open. When the suction wind force disappears, the smoke shield 20 falls back to the closed position under its own gravity and closes the air inlet again. In this way, the smoke shield 20 can automatically open or close the air inlet 11 by using the suction wind force provided by the fan, without the need for an additional drive device, and the cost is relatively low.

[0043] The housing 10 includes a fan frame 101 and a smoke collecting hood 102 . The fan is installed on the fan frame 101 . The air inlet 11 is opened in the smoke collecting hood 102 . The air guide plate 12 is arranged in the smoke collecting hood 102 .

[0044] Furthermore, a first limiting plate 111 and a second limiting plate 112 are respectively provided at opposite ends of the air inlet 11. When the smoke barrier 20 is in the closed position, along the height direction X of the range hood, the first limiting plate 111 stops below the first smoke barrier 21, and the second limiting plate 112 stops above the second smoke barrier 22. The first limiting plate 111 is used to limit the first smoke barrier 21, and the second limiting plate 112 limits the second smoke barrier 22, so that the smoke barrier 20 can be kept in the closed position and will not rotate around the rotating shaft 30 under the action of its own gravity. In this way, when the smoke barrier 20 is in the balanced position, a first inlet 113 is formed between the first smoke barrier 21 and the first limiting plate 111, and a second inlet 114 is formed between the second smoke barrier 22 and the second limiting plate 112.

[0045] Furthermore, if Figure 6 As shown, the second limiting plate 112 is provided with an avoidance groove 112 a, and the avoidance groove 112 a is used to avoid the connecting rod 41 to avoid interference between the second limiting plate 112 and the connecting rod 41 .

[0046] See also Figure 1 and Figure 5The shell 10 has a mating surface 15 disposed toward the first smoke barrier 21. The mating surface 15 is spaced apart from the first smoke barrier 21 and is used to form a first air inlet channel 16 together with the first smoke barrier 21. As the smoke barrier 20 switches between the closed position and the balanced position, the air inlet cross-sectional area of ​​the first air inlet channel 16 remains unchanged.

[0047] It is understandable that, without providing the matching surface 15, when the suction wind force provided by the fan is increased, the first smoke shield 21 further rotates toward the inside of the smoke hood 102, and the opening of the first inlet 113 is further increased. However, the wind speed may decrease because the flow cross-sectional area increases after the oil smoke enters the inside of the smoke hood 102. In other words, although the suction wind force provided by the fan is increased, the wind speed and air flow rate of the first inlet 113 may not increase as expected due to the influence of the flow cross-sectional area. By providing the matching surface 15, the size of the air inlet cross-sectional area of ​​the first air inlet channel 16 remains unchanged. When the suction wind force provided by the fan is increased, the first smoke shield 21 further rotates toward the inside of the smoke hood 102, the opening of the first inlet 113 is further increased, and the size of the air inlet cross-sectional area of ​​the first air inlet channel 16 remains unchanged. Therefore, the wind speed and air flow rate of the air inlet 11 can be increased as expected. That is, by providing the matching surface 15, it is possible to avoid interference with the wind speed due to changes in the flow cross-sectional area. Furthermore, the mating surface 15 can also guide the oil smoke entering the smoke collecting hood 102, which is conducive to the oil smoke being quickly sucked out by the fan. Specifically, the mating surface 15 is configured as an arc surface, and the mating surface 15 is parallel to the rotation track of the first smoke shielding part 21.

[0048] The first smoke shield 21 is provided with a smoke sensor probe 60, which is used to detect the oil smoke concentration in the first air inlet channel 16; and the fan is configured to increase the suction wind force provided by the fan when the smoke sensor probe 60 detects that the oil smoke concentration in the first air inlet channel 16 is greater than the target value. In this way, the suction wind force of the fan can be adjusted according to the oil smoke concentration in the first air inlet channel 16 detected by the smoke sensor probe 60, so that the oil smoke absorption capacity of the range hood 100 is matched with the oil smoke concentration.

[0049] Furthermore, a reflective groove 151 is provided on the mating surface 15 corresponding to the smoke sensor probe 60, and the extension direction of the reflective groove 151 is arranged parallel to the rotation track of the smoke sensor probe 60. In this way, the smoke sensor probe 60 can detect the oil fume concentration in the reflective groove 151. It can be understood that since the flow rate of oil fume entering the smoke hood 102 is relatively fast, it is easy to form turbulence. By providing the reflective groove 151, the reflective groove 151 can guide the oil fume, so that the oil fume flowing along the reflective groove 151 is more stable. Therefore, the smoke sensor probe 60 detects the oil fume concentration in the reflective groove 151 more accurately.

[0050] Furthermore, a convex portion 152 is provided on the mating surface 15, and the reflective groove 151 is opened on the convex portion 152. Along the gravity direction, a notch 153 connected to the reflective groove 151 is opened at the bottom of the convex portion 152, and the notch 153 is used to allow the oil droplets to flow out of the reflective groove 151 under the force of their own gravity. In this way, the convex portion 152 can prevent the oil droplets formed in the first air inlet channel 16 from entering the reflective groove 151, and by providing the notch 153, the oil droplets formed in the reflective groove 151 can be discharged under their own gravity, thereby preventing the oil droplets from gathering in the reflective groove 151 and interfering with the smoke sensor probe 60 detecting the oil smoke concentration in the reflective groove 151.

[0051] The range hood 100 further includes a damping rod 70, which is located in the housing 10, and one end of the damping rod 70 is connected to the first smoke barrier 21, and the other end is connected to the inner wall of the housing 10. The damping rod 70 can absorb the impact during the opening and closing of the smoke barrier 20, thereby reducing the shaking of the smoke barrier 20, and making the smoke barrier 20 stable at the equilibrium position. Specifically, one end of the damping rod 70 is hingedly connected to the first smoke barrier 21, and the other end is hingedly connected to the inner wall of the housing 10. The number of damping rods 70 can also be configured as multiple.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A range hood, characterized in that: The range hood (100) comprises: A housing (10), wherein the housing (10) is provided with an air inlet (11); A smoke shield (20), wherein a rotating shaft (30) is provided on the smoke shield (20), and the smoke shield (20) comprises a first smoke shield portion (21) and a second smoke shield portion (22) respectively located on both sides of the rotating shaft (30), the smoke shield (20) is rotatably mounted on the air inlet (11) around the rotating shaft (30), and the smoke shield (20) has a closed position and a balanced position, wherein when the smoke shield (20) is rotated to the closed position, the air inlet (11) is closed; when the smoke shield (20) is rotated to the closed position, the air inlet (11) is closed; When the plate (20) rotates to the equilibrium position, the air inlet (11) is opened, and the first smoke shielding portion (21) is turned relative to the air inlet (11) toward the inside of the shell (10) to be spaced apart from and surrounded by an edge of one side of the air inlet (11) to form a first inlet (113), and the second smoke shielding portion (22) is turned relative to the air inlet (11) toward the outside of the shell (10) to be spaced apart from and surrounded by an edge of the other side of the air inlet (11) to form a second inlet (114); The smoke shield (20) is arranged to be inclined relative to the range hood (100) in the height direction X, and the height of the second smoke shield (22) is greater than the height of the first smoke shield (21); as the smoke shield (20) switches from a closed position to a balanced position, the degree of inclination of the smoke shield (20) relative to the range hood (100) in the height direction X gradually increases.

2. The range hood according to claim 1, characterized in that: The shell (10) is provided with an air guide plate (12), the air guide plate (12) extending from a side edge of the air inlet (11) close to the second smoke shield (22) toward the outside of the shell (10), and expanding outward relative to the air inlet (11), the air guide plate (12) being used to guide oil smoke into the second inlet (114).

3. The range hood according to claim 2, characterized in that: The housing (10) further comprises an extension plate (13), wherein the extension plate (13) is slidably connected to the air guide plate (12) along an extension direction of the air guide plate (12), and the extension plate (13) has a retracted position and an extended position; When the extension plate (13) is in a retracted position, the extension plate (13) is located on the surface of the air guide plate (12); when the extension plate (13) is in an extended position, the extension plate (13) can extend out of the end of the air guide plate (12) away from the air inlet (11).

4. The range hood according to claim 3, characterized in that: When the extension plate (13) is in the maximum extended position, the extension plate (13) and the air guide plate (12) are seamlessly connected.

5. The range hood according to claim 3, characterized in that: The range hood further comprises a connecting structure (40), wherein the connecting structure (40) connects the second smoke shielding portion (22) and the extension plate (13); Wherein, as the smoke shield plate (20) rotates around the rotating shaft (30), the second smoke shield portion (22) can drive the extension plate (13) to slide relative to the air guide plate (12) through the connecting structure (40).

6. The range hood according to claim 5, characterized in that: The connecting structure (40) comprises a connecting rod (41) and a sliding block (42); one end of the connecting rod (41) is hinged to the second smoke blocking portion (22), and the other end is hinged to the extension plate (13); The sliding block (42) is fixedly mounted on the extension plate (13); the wind guide plate (12) is provided with a guide rail (131); and the sliding block (42) is slidably connected to the guide rail (131).

7. The range hood according to claim 6, characterized in that: The air guide plate (12) is provided with a through hole (121); the guide rail (131) is located on a side of the air guide plate (12) away from the extension plate (13) and is provided with a slide groove (132); the slide groove (132) is connected to the through hole (121) through its own opening (133); and a limiting step (134) is provided at the opening (133) of the slide groove (132); One end of the sliding block (42) is slidably mounted in the sliding groove (132) and is stopped at the limiting step (134), and the other end extends out of the through hole (121) and is fixedly connected to the extension plate (13).

8. The range hood according to claim 2, characterized in that: When the smoke shield (20) is rotated to a balanced position, along the thickness direction Y of the range hood, the second smoke shield (22) does not extend out of the air guide plate (12).

9. The range hood according to any one of claims 1 to 8, characterized in that: The range hood further comprises a fan (50), wherein the fan (50) is installed inside the housing (10), the surface area of ​​the first smoke barrier (21) is greater than the surface area of ​​the second smoke barrier (22), and the center of gravity of the smoke barrier plate (20) is located at the first smoke barrier (21); When the smoke baffle (20) is in a closed position and the fan (50) provides a suction wind force toward the interior of the shell (10), the smoke baffle (20) can rotate around the rotating shaft (30) to a balanced position and stop rotating at the balanced position so that the air inlet (11) remains open. When the suction wind force disappears, the smoke baffle (20) can fall back to the closed position under the action of its own gravity.

10. The range hood according to claim 9, characterized in that: A first limit plate (111) and a second limit plate (112) are respectively provided at opposite ends of the air inlet (11); when the smoke shield (20) is in a closed position, along a height direction X of the range hood, the first limit plate (111) stops below the first smoke shield (21), and the second limit plate (112) stops above the second smoke shield (22).

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