Oil screen device and range hood

Abstract

The present application discloses an oil screen device and a range hood. The oil screen device includes an oil screen bracket and a filter screen. The oil screen bracket is provided with a first ventilation hole. The filter screen is provided with a second ventilation hole. The second ventilation hole is smaller than the first ventilation hole. The filter screen and the oil screen bracket are movably connected to have a first state and a second state relative to the oil screen bracket. In the first state, the filter screen covers the first ventilation hole so that oil smoke passes through the first ventilation hole and the second ventilation hole in sequence. In the second state, the filter screen opens the first ventilation hole so that oil smoke passes through the first ventilation hole and the second ventilation hole respectively. The technical solution of the present application is provided with an oil screen bracket and a filter screen. The filter screen and the oil screen bracket are movably connected to have a first state and a second state. In the normal exhaust mode of the range hood, the filter screen can be switched to the first state, where the filter screen covers the first ventilation hole to improve the filtering effect of the oil smoke. In the strong exhaust mode of the range hood, the filter screen can be switched to the second state to increase the exhaust speed.

Description

Technical Field

[0001] The present application relates to the technical field of range hoods, and in particular to an oil screen device and a range hood. Background Art

[0002] The range hood is equipped with a filter to separate oil smoke. Generally speaking, if the mesh of the filter is fine and dense, it can effectively separate the oil smoke, but it will affect the exhaust volume. If the mesh of the filter is large and sparse, it can ensure a large exhaust volume, but it cannot separate the oil smoke well. Summary of the Invention

[0003] The present application aims to solve the technical problems in the related art at least to a certain extent. To this end, the present application proposes an oil screen device, which can well adapt to different smoke exhaust requirements when applied to a range hood.

[0004] To achieve the above-mentioned purpose, the present application discloses an oil net device suitable for installation on the smoke exhaust path of a range hood, the oil net device comprising:

[0005] An oil screen bracket is provided with a first ventilation hole; and

[0006] The filter is provided with a second ventilation hole, which is smaller than the first ventilation hole. The filter is movably connected to the oil net bracket to have a first state and a second state relative to the oil net bracket. In the first state, the filter covers the first ventilation hole to allow oil smoke to pass through the first ventilation hole and the second ventilation hole in sequence. In the second state, the filter opens the first ventilation hole to allow oil smoke to pass through the first ventilation hole and the second ventilation hole respectively.

[0007] In some embodiments of the present application, the filter screen forms a cover-like structure, or the filter screen forms a cover-like structure in the second state.

[0008] In some embodiments of the present application, the filter screen and the oil screen bracket are slidably connected to switch between the first state and the second state.

[0009] In some embodiments of the present application, the filter screen includes a panel and a first enclosure provided around the panel, and the panel is provided with the second ventilation hole;

[0010] The oil net bracket is provided with a second enclosure plate around the first ventilation hole. One of the first enclosure plate and the second enclosure plate is provided with a slider, and the other is provided with a slide rail. The slider and the slide rail are slidably connected.

[0011] In some embodiments of the present application, one of the sliding block and the sliding rail is provided on a side of the second enclosure facing away from the second ventilation hole.

[0012] In some embodiments of the present application, the oil net device also includes a third ventilation hole, the second ventilation hole is smaller than the third ventilation hole, the third ventilation hole is arranged between the first enclosure, the second enclosure and / or the oil net bracket and the filter, and the third ventilation hole is connected with the first ventilation hole in the second state, and is not connected with the first ventilation hole in the first state.

[0013] In some embodiments of the present application, the filter includes a first filter and a second filter that are rotatably connected, the first filter and the second filter are respectively slidably connected to the oil screen bracket, and the first filter and the second filter form an inverted V-shaped structure in the second state.

[0014] In some embodiments of the present application, the oil screen bracket is provided with a first slide groove and a second slide groove, the first filter screen is provided with a first slide protrusion that can be slidably arranged in the first slide groove, and the second filter screen is provided with a second slide protrusion that can be slidably arranged in the second slide groove, and the first slide groove and the second slide groove extend obliquely toward each other so that the filter screen is lifted away from the oil screen bracket in the second state.

[0015] In some embodiments of the present application, in the second state, a third ventilation hole is formed between the first filter and the second filter and the oil net bracket respectively, and a third ventilation hole is formed between the first filter, the second filter and the oil net bracket, the third ventilation hole is larger than the second ventilation hole, and the third ventilation hole is connected to the first ventilation hole.

[0016] In some embodiments of the present application, the filter is configured to switch between the first state and the second state under the action of smoke exhaust pressure and gravity.

[0017] The present application also discloses a range hood, which includes the above-mentioned oil net device.

[0018] The technical solution of the present application is to set an oil screen bracket and a filter screen, and the filter screen and the oil screen bracket can be movably connected to have a first state and a second state. In the normal smoke exhaust mode of the range hood, it can be switched to the first state, the filter screen covers the first ventilation hole, and the oil smoke needs to be discharged through the first ventilation hole and the second ventilation hole in sequence, thereby improving the filtering effect of the oil smoke. In the strong smoke exhaust mode of the range hood, it can be switched to the second state, the filter screen opens the first ventilation hole, and the oil smoke is discharged through both the second ventilation hole and the first ventilation hole, thereby improving the smoke exhaust speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 the structures shown in these drawings without paying any creative work.

[0020] Figure 1 A partial schematic diagram of a range hood in some embodiments;

[0021] Figure 2 Schematic diagram of an oil screen device in some embodiments;

[0022] Figure 3 Schematic diagram of the oil screen bracket in some embodiments;

[0023] Figure 4 Schematic diagram of the filter in some embodiments;

[0024] Figure 5 for Figure 1 Middle AA cross-sectional view (filter in the first state);

[0025] Figure 6 A schematic diagram of the filter in some embodiments in a second state;

[0026] Figure 7 Schematic diagram of the oil screen device in some embodiments (the filter screen is in the second state);

[0027] Figure 8 Schematic diagram of the oil screen device in some embodiments (the filter screen is in the first state).

[0028] Description of Figure Numbers:

[0029] Oil net bracket 1000, first ventilation hole 1100, second enclosure 1200, slide rail 1210, first slide groove 1230, second slide groove 1240;

[0030] Filter 2000, panel 2100, second ventilation hole 2110, first enclosure 2200, slider 2210, first filter 2001, first sliding protrusion 2002, second filter 2003, second sliding protrusion 2004;

[0031] third ventilation hole 3000;

[0032] Flue 4000.

[0033] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0038] The present application discloses an oil net device, which is suitable for installation on a smoke exhaust path. The oil net device will be described in detail below in conjunction with a range hood. It can be understood that in addition to being applied to range hoods, the oil net device can also be applied to other smoke exhaust devices that require filtering.

[0039] Combine Figure 1 、 Figure 2 、 Figure 5 and Figure 6As shown, in some embodiments of the present application, the oil net device includes an oil net bracket 1000 and a filter 2000, and the filter 2000 is movably connected to the oil net bracket 1000, so that the filter 2000 has two states relative to the oil net bracket 1000, one of which is suitable for use at low smoke exhaust volume, and the other is suitable for use at high smoke exhaust volume.

[0040] Specifically, the oil screen assembly is mounted on the smoke exhaust path, which is the path that oil smoke travels from generation to exhaust outdoors. For example, a range hood has a flue 4000, which can constitute the smoke exhaust path. The oil screen bracket 1000 serves as a supporting framework for mounting the filter 2000. The oil screen bracket 1000 is fixedly attached when the range hood is installed. For example, the oil screen assembly is fixed to the lower air inlet of the flue 4000 via the oil screen bracket 1000.

[0041] The oil screen support 1000 is provided with a first ventilation hole 1100. The filter 2000 and the oil screen support 1000 are movably connected to each other so as to have two positions relative to the oil screen support 1000: a first position and a second position. In the first position, the filter 2000 covers the first ventilation hole 1100, and in the second position, the filter 2000 opens the first ventilation hole 1100. It is understood that the movably connected filter 2000 and the oil screen support 1000 can be implemented in a variety of ways, as long as the position of the filter 2000 relative to the oil screen support 1000 can be changed to switch between the first and second positions. For example, the filter 2000 and the oil screen support 1000 can be relatively rotatable, relatively slidable, or stretchably deformable relative to each other.

[0042] Filter 2000 is provided with a second ventilation hole 2110, which is smaller than first ventilation hole 1100. Here, "second ventilation hole 2110 is smaller than first ventilation hole 1100" means that the airflow area of ​​second ventilation hole 2110 is smaller than that of first ventilation hole 1100. When filter 2000 is in the first state, i.e., covering first ventilation hole 1100, oil smoke cannot be discharged directly through first ventilation hole 1100 alone, but must pass through first ventilation hole 1100 and second ventilation hole 2110 in sequence. When oil smoke passes through second ventilation hole 2110, oil mist particles in the oil smoke are intercepted by filter 2000, ensuring the effective filtration of oil smoke. When the filter 2000 is in the second state, that is, the state of opening the first ventilation hole 1100, the oil smoke can be discharged directly through the first ventilation hole 1100, and can also be discharged after being filtered through the second ventilation hole 2110. Since the first ventilation hole 1100 is set larger, most of the oil smoke will be discharged through the first ventilation hole 1100, and a small part of the oil smoke will be discharged through the second ventilation hole 2110. In this case, the exhaust volume and efficiency can be improved.

[0043] For example, when the user is cooking on low heat, the oil smoke generated is relatively small. At this time, the range hood can be in the general exhaust mode, the filter 2000 is in the first state, and the oil smoke needs to be discharged through the second ventilation hole 2110. Therefore, the filter 2000 can form a better filtration for the oil smoke and meet the requirements for oil smoke filtration and exhaust volume.

[0044] When the user is cooking with a high fire, relatively more oil smoke is generated. At this time, the range hood can be in a strong exhaust mode, and the filter 2000 is in the second state. Most of the oil smoke is discharged through the first ventilation hole 1100, and a small amount of oil smoke is filtered and discharged through the second ventilation hole 2110, ensuring that a large amount of oil smoke generated in the kitchen can be discharged in time.

[0045] It is understood that there are various ways to switch the filter 2000 between the first state and the second state, such as by providing a drive mechanism to achieve movement of the filter 2000, which drives the filter 2000 to switch between the first state and the second state. Alternatively, the filter 2000 can switch between the first state and the second state under the action of pressure difference and gravity (which will be described in detail below).

[0046] The technical solution of the present application is to set an oil net bracket 1000 and a filter 2000. The filter 2000 and the oil net bracket 1000 can be movably connected to have a first state and a second state. In the normal smoke exhaust mode of the range hood, it can be switched to the first state, the filter 2000 covers the first ventilation hole 1100, and the oil smoke needs to be discharged through the first ventilation hole 1100 and the second ventilation hole 2110 in sequence, thereby improving the filtering effect of the oil smoke. In the strong smoke exhaust mode of the range hood, it can be switched to the second state, the filter 2000 opens the first ventilation hole 1100, and the oil smoke is discharged through the second ventilation hole 2110 and directly discharged through the first ventilation hole 1100, thereby improving the smoke exhaust speed.

[0047] As mentioned above, when the filter 2000 is in the second state, that is, when the first ventilation hole 1100 is opened, since the first ventilation hole 1100 is larger, most of the oil smoke is discharged through the first ventilation hole 1100. In order to filter the oil smoke discharged through the first ventilation hole 1100, the oil smoke is discharged through the first ventilation hole 1100. Figure 4 and Figure 7 As shown, in some embodiments of the present application, the filter 2000 is configured as a hood-like structure. That is, the filter 2000 is not a flat plate. When the filter 2000 is configured as a hood-like structure, it encloses a certain accommodation space. When the filter 2000 opens the first ventilation hole 1100, the oil smoke is blocked by the filter 2000 during its flow and changes direction. As a result, most of the oil smoke is directly discharged through the first ventilation hole 1100, while a small amount of oil smoke still flows out through the second ventilation hole 2110. The amount of oil smoke flowing out through the second ventilation hole 2110 is equivalent to the maximum ventilation volume when the filter 2000 closes the first ventilation hole 1100 (that is, this maximum ventilation volume is the ventilation volume when the filter 2000 is about to be lifted up). Since the filter 2000 has a hood-like structure, it has a certain wind-gathering effect on the oil smoke. The oil mist particles in the oil smoke will collide with the filter 2000 under the action of inertia and adhere to the filter 2000. This can reduce the oil mist particle content of the oil smoke directly discharged from the first ventilation hole 1100, thereby ensuring a large exhaust volume requirement and achieving a certain filtering effect.

[0048] It should be understood that since the filter 2000 has two states relative to the oil screen support 1000, the hood-like structure can only be formed when the filter 2000 switches from the first state to the second state. In other words, in the second state, the filter 2000 forms a hood-like structure, while in the first state, the filter 2000 may not form a hood-like structure. For example, the filter 2000 mentioned below includes a first filter 2001 and a second filter 2003. The hood-like structure is formed by forming a V-shaped structure with the first filter 2001 and the second filter 2003. This makes the oil screen device suitable for different products and installation environments.

[0049] In some embodiments, the filter 2000 is slidably connected to the oil net bracket 1000 to switch between the first state and the second state. It is through the slidable connection that the filter 2000 can be lifted and lowered as a whole relative to the oil net bracket 1000. In this way, the hood-like structure formed by the filter 2000 can be oriented towards the direction of smoke exhaust to the maximum extent, so that more oil mist particles in the smoke directly discharged through the first ventilation hole 1100 can adhere to the filter 2000 under the action of inertia.

[0050] Optionally, in order to facilitate switching of the filter 2000 between the first state and the second state, that is, to facilitate switching the filter 2000 from the first state to the second state, and vice versa, in some embodiments of the present application, the filter 2000 is configured to switch between the first state and the second state under the action of smoke exhaust pressure and gravity. In this way, the filter 2000 switches states in response to changes in smoke exhaust requirements, without the need for an additional drive mechanism, thereby reducing structural complexity.

[0051] Specifically, it can be understood that a fan will be provided in the range hood, and the fan will be connected to the motor drive. The fan will rotate under the action of the motor. When the fan rotates, a negative pressure will be formed inside the range hood. When the ambient pressure is greater than the negative pressure inside the range hood, the range hood can absorb the fumes in the kitchen environment.

[0052] When a user is cooking over high heat and generating a large amount of oil smoke, the range hood can be put into a strong exhaust mode. For example, the motor speed is increased to create a greater negative pressure, that is, a greater suction force. Under the action of the pressure differential, the filter 2000 moves relative to the oil screen bracket 1000, switching from the first state to the second state. In other words, at this time, the pressure differential is greater than the gravity acting on the filter 2000 itself, and the filter 2000 can automatically open the first ventilation hole 1100 in response to the strong exhaust of the range hood. It is understood that the range hood can switch to the strong exhaust mode manually or automatically by the range hood.

[0053] When the user is cooking on low heat and the amount of oil smoke generated is small, the range hood can be in the general smoke exhaust mode, that is, the suction force generated by the rotation of the fan wheel is relatively small. At this time, the pressure difference borne by the filter 2000 is less than the gravity it itself bears, so the filter 2000 will re-cover the first ventilation hole 1100 under the action of gravity.

[0054] Combine Figure 3 and Figure 4As shown, in some embodiments of the present application, the filter 2000 includes a panel 2100 and a first enclosing plate 2200. The panel 2100 is provided with a second ventilation hole 2110. The first enclosing plate 2200 is arranged around the panel 2100 and extends downward, thereby forming a cover-like structure with the panel 2100. The oil screen support 1000 is provided with a second enclosing plate 1200. The second enclosing plate 1200 is arranged around the first ventilation hole 1100 and extends upward. One of the first enclosing plate 2200 and the second enclosing plate 1200 is provided with a slider 2210, and the other is provided with a slide rail 1210. The slider 2210 and the slide rail 1210 cooperate to achieve a sliding connection between the filter 2000 and the oil screen support 1000.

[0055] For example, in the case where the first enclosure 2200 is provided with a slider 2210 and the second enclosure 1200 is provided with a slide rail 1210, the first enclosure 2200 is connected to the slide rail 1210 of the second enclosure 1200 via the slider 2210, so that the filter 2000 can move relative to the oil screen support 1000. When the filter 2000 is lifted relative to the oil screen support 1000, for example, when the filter 2000 is lifted due to a pressure differential, the filter 2000 opens the first ventilation hole 1100. When the filter 2000 is lowered relative to the oil screen support 1000, for example, when the filter 2000 is subjected to a greater gravity force, the filter 2000 lowers and covers the first ventilation hole 1100. The slide rail 1210 has a certain length, which provides a certain travel distance to prevent the filter 2000 from sliding excessively relative to the oil screen support 1000 and separating. In addition, through the cooperation between the slide rail 1210 and the slider 2210, the oil accumulated therein can lubricate the slide rail 1210 and the slider 2210, so that the oil screen device can work stably and smoothly for a long time. Optionally, in order to make the sliding of the filter 2000 more stable, the slide rail 1210 includes two symmetrically arranged ones.

[0056] The first enclosure 2200 is provided with a third ventilation hole 3000, which is larger than the second ventilation hole 2110. When the filter 2000 is in the first state, i.e., covering the first ventilation hole 1100, the third ventilation hole 3000 is not connected to the first ventilation hole 1100, and the oil smoke can only be discharged through the second ventilation hole 2110 of the filter 2000. For example, the third ventilation hole 3000 can be blocked by the second enclosure 1200. When the filter 2000 is in the second state, i.e., opening the first ventilation hole 1100, the third ventilation hole 3000 is not blocked and is connected to the first ventilation hole 1100, and the oil smoke can be discharged through the third ventilation hole 3000.

[0057] Of course, the first enclosure 2200 may not be provided with the third ventilation hole 3000, and the third ventilation hole 3000 may be provided on the second enclosure 1200, which is similar to the provision of the third ventilation hole 3000 on the first enclosure 2200, and will not be repeated.

[0058] Alternatively, the first enclosure 2200 and the second enclosure 1200 are not provided with the third ventilation hole 3000, but when the filter 2000 opens the first ventilation hole 1100, the third ventilation hole 3000 is formed between the filter 2000 and the oil net bracket 1000, so that the passage of oil smoke can also be achieved.

[0059] Optionally, combined Figure 3 As shown, in some embodiments of the present application, one of a slider 2210 and a slide rail 1210 is provided on the side of the second enclosing plate 1200 facing away from the second ventilation hole 2110. Taking the provision of the slide rail 1210 on the second enclosing plate 1200 as an example, the slide rail 1210 is provided on the side of the second enclosing plate 1200 facing away from the second ventilation hole 2110. Since the filter screen 2000 forms a cover-like structure through the panel 2100 and the first enclosing plate 2200, when the filter screen 2000 is connected to the slide rail 1210 via the slider 2210, the filter screen 2000 can cover the first ventilation hole 1100, and the second enclosing plate 1200 is located within the covering range of the filter screen 2000. This can improve the effectiveness of the filter screen 2000 in covering the first ventilation hole 1100 and prevent oil smoke from flowing through the gap between the first enclosing plate 2200 and the second enclosing plate 1200.

[0060] Combine Figure 7 and Figure 8 As shown, in some embodiments of this embodiment, the filter 2000 includes a first filter 2001 and a second filter 2003 that are rotatably connected, and the first filter 2001 and the second filter 2003 are respectively slidably connected to the oil net bracket 1000, and the first filter 2001 and the second filter 2003 form an inverted V-shaped structure in the second state.

[0061] Specifically, when the filter screen 2000 is in the first state, the first filter screen 2001 and the second filter screen 2003 form a flat plate structure that covers the first ventilation hole 1100. In this case, the combination of the first filter screen 2001 and the second filter screen 2003 occupies less space. When the filter screen 2000 is in the second state, for example, when the first filter screen 2001 and the second filter screen 2003 are lifted by a greater pressure differential, the first filter screen 2001 and the second filter screen 2003 are rotatably connected to each other and are slidably connected to the oil screen bracket 1000. As a result, the first filter screen 2001 and the second filter screen 2003 gradually approach each other to form an inverted V-shaped structure, which is equivalent to a hood-like structure. When an inverted V-shaped structure is formed between the first filter 2001 and the second filter 2003, since the first filter 2001 and the second filter 2003 are lifted relative to the oil net bracket 1000, a third ventilation hole 3000 connected to the first ventilation hole 1100 is formed between the first filter 2001 and the oil net bracket 1000, and a third ventilation hole 3000 connected to the first ventilation hole 1100 is formed between the first filter 2001 and the second filter 2003 and the oil net bracket 1000. In this way, there is no need to separately set the third ventilation hole 3000 for the filter 2000 and the oil net bracket 1000, thereby reducing the structural complexity of the oil net device.

[0062] Optionally, in order to make it easier for the first filter screen 2001 and the second filter screen 2003 to form an inverted V-shaped structure in the second state, in some embodiments of the present application, the oil screen bracket 1000 is provided with a first slide groove 1230 and a second slide groove 1240, the first filter screen 2001 is provided with a first slide protrusion 2002 slidably arranged in the first slide groove 1230, and the second filter screen 2003 is provided with a second slide protrusion 2004 slidably arranged in the second slide groove 1240, and the first slide groove 1230 and the second slide groove 1240 extend obliquely toward each other, combined with Figure 8 As shown, the first chute 1230 and the second chute 1240 form an eight-shaped structure. When the first filter 2001 and the second filter 2003 are subjected to a pressure differential, the first filter 2001 and the second filter 2003 can move along the first chute 1230 and the second chute 1240, respectively, to move closer to each other and lift away from the oil screen bracket 1000, thus forming an inverted V-shaped structure. Optionally, to ensure smoother sliding of the filter 2000, the first chute 1230 includes two symmetrically arranged first chute 1240, and the second chute 1240 also includes two symmetrically arranged second chute 1240.

[0063] This application also discloses a range hood including the above-mentioned oil screen device. The structure of the oil screen device in this embodiment refers to the above-mentioned embodiment. Since the range hood of this embodiment adopts the technical solution of the above-mentioned embodiment, it at least has the beneficial effects brought by the technical solution of the above-mentioned embodiment, which will not be described in detail here.

[0064] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. An oil screen device, suitable for installation on the exhaust path of a range hood, characterized in that: The oil net device includes: An oil screen bracket is provided with a first ventilation hole; and a filter screen having a second ventilation hole, the second ventilation hole being smaller than the first ventilation hole; the filter screen being movably connected to the oil screen bracket to have a first state and a second state relative to the oil screen bracket; in the first state, the filter screen covers the first ventilation hole to allow oil smoke to pass through the first ventilation hole and the second ventilation hole in sequence; in the second state, the filter screen opens the first ventilation hole to allow oil smoke to pass through the first ventilation hole and the second ventilation hole respectively; the filter screen and the oil screen bracket are slidably connected to switch between the first state and the second state; The filter screen includes a first filter screen and a second filter screen that are rotatably connected, the first filter screen and the second filter screen are respectively slidably connected to the oil screen bracket, and the first filter screen and the second filter screen form an inverted V-shaped structure in the second state; The oil screen support is provided with a first sliding groove and a second sliding groove, the first filter screen is provided with a first sliding protrusion slidably arranged in the first sliding groove, and the second filter screen is provided with a second sliding protrusion slidably arranged in the second sliding groove, and the first sliding groove and the second sliding groove extend obliquely toward each other so that the filter screen is lifted off the oil screen support in the second state; In the second state, a third ventilation hole is formed between the first filter and the second filter and the oil net bracket respectively, and a third ventilation hole is formed between the first filter, the second filter and the oil net bracket. The third ventilation hole is larger than the second ventilation hole, and the third ventilation hole is connected to the first ventilation hole.

2. The oil screen device according to claim 1, wherein: The filter screen forms a cover-like structure, or the filter screen forms a cover-like structure in the second state.

3. The oil screen device according to claim 1, wherein: The filter is configured to switch between the first state and the second state under the action of smoke exhaust pressure and gravity.

4. A range hood, characterized in that: The range hood comprises the oil net device according to any one of claims 1 to 3.

Images