Range hood

Abstract

The utility model provides a range hood, which relates to the field of household appliances and comprises a shell, a fixed filter screen mounted at an air inlet of the shell, a rotating shaft and a drawing mechanism, the rotating shaft is used for mounting filter rolls; the drawing mechanism is arranged on the opposite side of the rotating shaft along the plane where the fixed filter screen is located and comprises a rotating shaft and a pressing part which are in friction fit, and the rotating shaft is parallel to the rotating shaft; under the condition that the filter disc roll is mounted on the rotating shaft, the filter disc on the outermost layer of the filter disc roll is laid on the surface of one side of the fixed filter screen, and the free end, far away from the rotating shaft, of the filter disc on the outermost layer penetrates through a gap between the pressing part and the rotating shaft; the shell is provided with a filter disc outlet communicated with a gap between the rotating shaft and the pressing part or a filter disc containing cavity provided with a reel. The technical problems that in the prior art, an extractor hood is insufficient in oil smoke adsorption capacity, a fixed filter screen needs to be frequently disassembled and assembled, reliability is damaged, and user experience is poor are solved.

Description

Technical Field

[0001] The utility model relates to the field of household appliances, and in particular to a range hood. Background Art

[0002] As an essential household appliance in modern society, the range hood is widely used in the cooking area. With the progress of the times, some portable tabletop range hoods have also emerged and are applied to cooking places outside the kitchen such as restaurants or outdoors.

[0003] The existing range hood mainly relies on a fixed filter installed at the air inlet of its housing to filter part of the oil fume, so as to adsorb the oil fume, protect the fan unit inside the range hood, and keep the range hood running efficiently. Therefore, the existing range hood has at least the following problems:

[0004] (1) The amount of oil fume that can be adsorbed by relying solely on the fixed filter is small, and the oil fume adsorption effect needs to be improved;

[0005] (2) After the fixed filter adsorbs the oil fume, it needs to be cleaned, that is, the fixed filter needs to be repeatedly disassembled and replaced; however, frequent disassembly and assembly of the fixed filter will affect the reliability of the fixed filter, resulting in a decline in product performance, and frequent disassembly and assembly operations will reduce the user experience. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a range hood to alleviate the above technical problems existing in the prior art.

[0007] To achieve the above purpose, the embodiments of the utility model adopt the following technical solutions:

[0008] The embodiments of the utility model provide a range hood, which includes a housing and a fixed filter installed at the air inlet of the housing. The range hood further includes a rotating shaft and a pulling mechanism. The rotating shaft is used to install a filter sheet roll; the pulling mechanism is arranged on the opposite side of the rotating shaft along the plane where the fixed filter is located, and includes a rotating shaft and a pressing part that are in frictional cooperation, and the rotating shaft is parallel to the rotating shaft; when a filter sheet roll is installed on the rotating shaft, the outermost filter sheet of the filter sheet roll is laid on one side surface of the fixed filter, and the free end of the outermost filter sheet away from the rotating shaft passes through the gap between the pressing part and the rotating shaft. The housing has a filter sheet outlet communicating with the gap between the rotating shaft and the pressing part or a filter sheet receiving cavity equipped with a reel.

[0009] The range hood provided by the utility model can at least achieve the following beneficial effects:

[0010] During use, a filter sheet roll is sleeved on the rotating shaft. The outermost filter sheet of the filter sheet roll is laid on one side surface of the fixed filter screen, and the free end of the outermost filter sheet away from the rotating shaft passes through the gap between the pressing part and the rotating shaft of the pulling mechanism. At this time, the free end of the outermost filter sheet away from the rotating shaft is in frictional engagement with the pressing part and the rotating shaft.

[0011] Among them, the outermost filter sheet of the filter sheet roll can be laid on the air inlet side surface of the fixed filter screen or on the air outlet side surface of the fixed filter screen. Taking the filter sheet roll laid on the air inlet side surface of the fixed filter screen as an example, under the suction of the fan unit inside the housing of the range hood, the oil fume is sucked into the housing through the filter sheet at the air inlet of the housing and the fixed filter screen, and then discharged from the air outlet of the housing. During the process, the oil fume is filtered and adsorbed on the filter sheet and the fixed filter screen by the filter sheet and the fixed filter screen, which can greatly reduce the oil fume in the cooking environment, and reduce the oil fume entering the fan unit inside the range hood. After single use or reaching the usage times, just replace the filter sheet in time.

[0012] When replacing the filter sheet, by rotating the rotating shaft, under the action of friction, the rotating shaft can gradually send out the outermost filter sheet of the filter sheet roll from the filter sheet outlet or send it into the filter sheet receiving cavity and wind it around the reel. In this way, the filter sheet that has adsorbed oil is removed and a clean filter sheet is replaced at the same time. Before the filter sheet roll is used up, the filter sheet can be replaced without opening the front cover of the housing, and the process is simple and convenient. After the filter sheet roll is used up, just open the front cover of the housing and replace a new filter sheet roll.

[0013] Thus, first, the fixed filter screen can be used to support the outermost filter sheet of the filter sheet roll, so that the outermost filter sheet and the fixed filter screen cooperate to form a double-layer filter screen structure to improve the oil fume adsorption effect; second, after the filter sheet roll is used up, just open it and replace a new filter sheet roll, which can effectively reduce the number of disassembly and assembly required for replacing the filter screen, reduce the impact of user disassembly and assembly on the reliability of the filter screen structure, and improve the user experience. Among them, when installing, the outermost filter sheet of the filter sheet roll is preferably but not limited to being laid on the air inlet side surface of the fixed filter screen.

[0014] In some embodiments of the range hood provided in this embodiment:

[0015] Optionally, along the thickness direction of the fixed filter screen, the rotating shaft and the rotating axis are arranged on both sides of the fixed filter screen.

[0016] Optionally, a filter sheet limiting groove is provided on the inner wall of the housing; and / or, a rotating shaft driving part and a stopping part cooperating with the rotating shaft driving part are further provided outside the housing.

[0017] Optionally, the housing has a filter sheet roll installation cavity, and the rotating shaft is installed in the filter sheet roll installation cavity.

[0018] Optionally, the pulling mechanism further includes a rotating shaft driving part, and the rotating shaft driving part is at least installed at one end of the rotating shaft to drive the rotating shaft to rotate.

[0019] Optionally, the rotating shaft driving member includes a driving motor and a motor controller; the motor controller has a stroke control unit for controlling the driving motor to rotate a preset stroke once; and / or, the motor controller has a stroke counting unit and an alarm unit, and the stroke counting unit triggers the alarm unit to send an alarm signal when the rotation stroke of the driving motor reaches the preset rotation stroke.

[0020] Optionally, a filter sheet margin alarm device is provided at the position on the housing where the rotating shaft is installed, and the filter sheet margin alarm device can send an alarm signal when the filter sheet roll reaches or is less than the preset margin.

[0021] Optionally, the housing has a filter sheet outlet, and a filter sheet cutting portion is provided at the filter sheet outlet.

[0022] Optionally, the range hood further includes a matching filter sheet roll, and the filter sheet roll is provided with a plurality of replacement units according to the single-laying length, and a break-type seam is provided between adjacent two replacement units.

[0023] Optionally, the pressing portion of the pulling mechanism is a convex block provided on the outer wall of the housing.

[0024] Particularly, in the content of the present utility model, the above "and / or" means that the structural features before "and / or" and the structural features after "and / or" are configured simultaneously or selectively. Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is the front view of the overall structure of the range hood provided by the present utility model when the filter screen sheet roll is installed;

[0027] Figure 2 For Figure 1 It is the schematic diagram of the overall structure for fixing the filter screen in

[0028] Figure 3 It is the top view of the range hood provided by the embodiment of the present utility model when the filter sheet roll is installed and the front cover of the housing is in the open state;

[0029] Figure 4 It is the axonometric view of the range hood provided by the embodiment of the present utility model when the filter sheet roll is installed and the front cover of the housing is in the open state;

[0030] Figure 5In some alternative embodiments of the range hood provided by the embodiments of the present utility model, it is a schematic diagram of the winding manner of the scroll for winding the filter sheet;

[0031] Figure 6 In some alternative embodiments of the range hood provided by the embodiments of the present utility model, it is a schematic diagram of the structure of the filter sheet cutting part;

[0032] Figure 7 For Figure 6 it is a partial enlarged view of part A in

[0033] Reference numerals: 100 - filter sheet roll; 110 - filter sheet; 1 - front shell cover; 2 - fixed filter screen; 3 - fan unit; 4 - rotating shaft; 5 - rotating axle; 6 - driving motor; 7 - pressing part; 8 - filter sheet cutting part; 9 - scroll. Specific embodiments

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model claimed, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0036] It should be noted that: like reference numerals and letters denote like items in the accompanying drawings. Therefore, once an item is defined in one of the accompanying drawings, it does not need to be further defined and explained in the subsequent accompanying drawings.

[0037] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this utility model is usually placed when in use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0038] In addition, the terms "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0041] This embodiment provides a range hood. Referring to Figures 1 to 7 , the range hood includes a housing and a fixed filter screen 2 installed at the air inlet of the housing. The range hood further includes a rotating shaft 4 and a pulling mechanism; the rotating shaft 4 is used for installing a filter sheet roll 100; the pulling mechanism is arranged on the opposite side of the rotating shaft 4 along the plane where the fixed filter screen 2 is located, and includes a rotating shaft 5 and a pressing part 7 that are in frictional cooperation, and the rotating shaft 5 is parallel to the rotating shaft 4; when the filter sheet roll 100 is installed on the rotating shaft 4, the outermost filter sheet 110 of the filter sheet roll 100 is laid on one side surface of the fixed filter screen 2, and the free end of the outermost filter sheet 110 away from the rotating shaft 4 passes through the gap between the pressing part 7 and the rotating shaft 5; the housing has a filter sheet outlet communicating with the gap between the rotating shaft 5 and the pressing part 7 or a filter sheet receiving cavity installed with a reel 9.

[0042] The range hood provided by this embodiment can at least achieve the following beneficial effects:

[0043] During use, the filter sheet roll 100 is sleeved on the rotating shaft 4, the outermost filter sheet 110 of the filter sheet roll 100 is laid on one side surface of the fixed filter screen 2, and the free end of the outermost filter sheet 110 away from the rotating shaft 4 passes through the gap between the pressing part 7 and the rotating shaft 5 of the pulling mechanism. At this time, the free end of the outermost filter sheet 110 away from the rotating shaft 4 is in frictional cooperation with the pressing part 7 and the rotating shaft 5.

[0044] Among them, the outermost filter sheet 110 of the filter sheet roll 100 can be laid on the air inlet side surface of the fixed filter net 2, or can be laid on the air outlet side surface of the fixed filter net 2. Taking the filter sheet roll 100 laid on the air inlet side surface of the fixed filter net 2 as an example, under the suction of the fan unit 3 inside the range hood housing, the cooking fumes are inhaled into the housing through the filter sheet 110 at the housing air inlet and the fixed filter net 2, and then discharged from the air outlet of the housing. During this process, the cooking fumes are filtered and adsorbed on the filter sheet 110 and the fixed filter net 2 through the filter sheet 110 and the fixed filter net 2, which can greatly reduce the cooking fumes in the cooking environment, and also reduce the cooking fumes entering the fan unit 3 inside the range hood. After single use or reaching the usage times, just replace the filter sheet 110 in time.

[0045] When replacing the filter sheet 110, by rotating the rotating shaft 5, under the action of friction, the rotating shaft 5 can gradually send out the outermost filter sheet 110 of the filter sheet roll 100 from the filter sheet outlet or send it into the filter sheet receiving cavity as shown in Figure 5 and wind it around the reel 9. In this way, while removing the filter sheet 110 that has adsorbed oil stains, a clean filter sheet 110 is replaced. Before the filter sheet roll 100 is used up, the filter sheet 110 can be replaced without opening the front cover 1 of the housing. The process is simple and convenient. After the filter sheet roll 100 is used up, just open the front cover 1 of the housing and replace it with a new filter sheet roll 100.

[0046] Therefore, first, the fixed filter net 2 can be used to support the outermost filter sheet 110 of the filter sheet roll 100, so that the outermost filter sheet 110 and the fixed filter net 2 cooperate to form a double-layer filter net structure to improve the oil fume adsorption effect; second, after the filter sheet roll 100 is used up, just open the front cover 1 of the housing and replace it with a new filter sheet roll 100, which can effectively reduce the number of disassembly and assembly required for replacing the filter net, reduce the impact of user disassembly and assembly on the reliability of the filter net structure, and improve the user experience. Among them, when installing, the outermost layer of the filter sheet roll 100 is preferably but not limited to being laid on the air inlet side surface of the fixed filter net 2.

[0047] In the range hood provided in this embodiment, to ensure that the filter sheet 110 has the largest adsorption area, preferably but not limited to, along the thickness direction of the fixed filter net 2, the rotating shaft 4 and the rotating shaft 5 are arranged on both sides of the fixed filter net 2. Thus, when the rotating shaft 5 is rotated, the filter sheet 110 can be drawn out closely against the fixed filter net 2, so that after the filter sheet 110 is drawn out, it is flat and attached to the surface of the fixed filter net 2, achieving the best filtering area and ensuring the oil fume adsorption effect of the filter sheet 110.

[0048] To further ensure the filtering effect of the filter sheet 110 and prevent wrinkles from occurring on the surface of the fixed filter screen 2 after the filter sheet 110 is laid, in some alternative embodiments of this embodiment, a filter sheet limiting groove is provided on the inner wall of the housing, so that the outermost filter sheet 110 of the filter sheet roll 100 is embedded in the limiting groove and slides along the limiting groove during pulling, thereby ensuring that the filter sheet 110 does not curl or wrinkle. In addition, a rotating shaft driving part and a stopping part cooperating with the rotating shaft driving part can be provided outside the housing. After the filter sheet 110 is laid by rotating the rotating shaft 5, the rotating shaft 4 is rotated through the rotating shaft driving part to further finely adjust the filter sheet 110 so that the filter sheet 110 fits more flatly on the fixed filter screen 2. Then, the rotating shaft 4 is fixed to the housing by using the stopping part to further ensure the filtering effect. The rotating shaft driving part can be optionally a driving rod connected to the end of the rotating shaft 4 and extending outside the housing or other structures that can operate the rotating shaft 4 to rotate outside the housing. The stopping part can be optionally but not limited to a snap structure.

[0049] In this embodiment, the housing of the range hood has a filter sheet roll installation cavity, the rotating shaft 4 is installed in the filter sheet roll installation cavity, and the housing front cover 1 is covered on the filter sheet roll installation cavity.

[0050] In this embodiment, for the pressing part 7 of the pulling mechanism, it can be optionally but not limited to a protrusion provided on the outer wall of the housing, an elastic member, or other structures that frictionally cooperate with the rotating shaft 5.

[0051] For the rotating shaft 5 of the pulling mechanism, its rotation can be driven when pulling the filter sheet 110, or can be driven by another driving member. For example but not limited to, the pulling mechanism further includes a rotating shaft driving member, and the rotating shaft driving member is at least installed at one end of the rotating shaft 5 to drive the rotating shaft 5 to rotate. Among them, preferably but not limited to, the rotating shaft driving member includes a driving motor 6 and a motor controller, and the motor controller has a stroke control unit for controlling the driving motor 6 to rotate a preset stroke each time, and the preset stroke is preset according to the length of the filter sheet 110 that needs to be pulled out each time to achieve the function of automatically replacing the filter sheet 110.

[0052] When the rotating shaft driving member includes a driving motor 6 and a motor controller, the motor controller can have a stroke counting unit and an alarm unit. When the rotation stroke of the driving motor 6 reaches the preset rotation stroke, the stroke counting unit triggers the alarm unit to send an alarm signal. The preset rotation stroke is determined according to the total length that the filter sheet roll 100 can supply the filter sheet 110 to be pulled out, so as to monitor whether the filter sheet roll 100 reaches the remaining amount that needs to be replaced. If it reaches, an alarm is sent to remind the user to replace the filter sheet roll 100.

[0053] In addition, in this embodiment, a filter sheet margin alarm device may be provided at the position on the housing where the rotating shaft 4 is installed. The filter sheet margin alarm device can emit an alarm signal when the filter sheet roll 100 reaches or is less than a preset margin. The filter sheet margin alarm device may optionally but is not limited to using a photoelectric sensor and an alarm. When the margin of the filter sheet roll 100 is greater than the preset margin, the photoelectric sensor is blocked, and the alarm does not alarm. When the margin of the filter sheet roll 100 reaches or is less than the preset margin, its thickness can no longer block the photoelectric sensor. The receiving end of the photoelectric sensor receives the optical signal emitted by the transmitting end and transmits it to the alarm, and the alarm emits an alarm signal. The margin alarm device may be provided simultaneously or selectively with the above-mentioned rotating shaft driving member including the driving motor 6 and the motor controller, and the motor controller has a stroke counting unit and an alarm unit.

[0054] In some alternative embodiments of this embodiment, such as Figure 6 and Figure 7 shown, the housing has a filter sheet outlet, and a filter sheet cutting part 8 is provided at the filter sheet outlet. When the filter sheet 110 that has adsorbed cooking fumes is taken out, it can be cut by the filter sheet cutting part 8 without finding another tool to cut the filter sheet 110. In this embodiment, the pressing part 7 may optionally be a long strip-shaped pressing block, the filter sheet outlet is provided in the edge area of the long strip-shaped pressing block, and the filter sheet cutting part 8 may optionally but is not limited to adopting a serrated structure provided at the edge of the pressing part 7 as shown in Figure 6 and Figure 7 shown.

[0055] During production and manufacturing, the range hood may or may not include a supporting filter sheet roll 100. When including a supporting filter sheet roll 100, the structure of the supporting filter sheet roll 100 preferably has a plurality of replacement units according to the single-laying length, and a break-type seam is provided between adjacent two replacement units. In this structure, when the housing has a filter sheet outlet, the above-mentioned filter sheet cutting part 8 may not be provided, and the filter sheet 110 that has adsorbed cooking fumes can be directly torn off along the break-type seam.

[0056] This embodiment can be an ordinary kitchen range hood or a tabletop range hood.

[0057] Finally, it should be noted that the embodiments in this specification are all described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. The above embodiments in this specification are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A range hood, comprising a housing and a fixed filter (2) mounted on an air inlet of the housing, characterized in that: The range hood further comprises a rotating shaft (4) and a pulling mechanism; The rotating shaft (4) is used to install the filter roll (100); The pulling mechanism is arranged on the opposite side of the rotating shaft (4) along the plane where the fixed filter screen (2) is located, and comprises a friction-fitting rotating shaft (5) and a pressing portion (7), wherein the rotating shaft (5) and the rotating shaft (4) are parallel to each other; when a filter sheet roll (100) is installed on the rotating shaft (4), the outermost filter sheet (110) of the filter sheet roll (100) is laid on a side surface of the fixed filter screen (2), and the free end of the outermost filter sheet (110) away from the rotating shaft (4) passes through the gap between the pressing portion (7) and the rotating shaft (5); The housing has a filter outlet communicating with the gap between the rotating shaft (5) and the pressing portion (7) or a filter receiving chamber on which a reel (9) is installed.

2. The range hood according to claim 1, characterized in that: Along the thickness direction of the fixed filter screen (2), the rotating shaft (4) and the rotating shaft (5) are arranged on both sides of the fixed filter screen (2).

3. The range hood according to claim 1, characterized in that: The inner wall of the shell is provided with a filter disc limiting groove; and / or, the outer side of the shell is further provided with a rotating shaft driving part and a stopping part cooperating with the rotating shaft driving part.

4. The range hood according to claim 1, characterized in that: The housing has a filter roll installation cavity, and the rotating shaft (4) is installed in the filter roll installation cavity.

5. The range hood according to any one of claims 1 to 4, characterized in that: The pulling mechanism further comprises a rotating shaft driving member, wherein the rotating shaft driving member is mounted at least on one end of the rotating shaft (5) to drive the rotating shaft (5) to rotate.

6. The range hood according to claim 5, characterized in that: The rotating shaft driving member comprises a driving motor (6) and a motor controller; The motor controller has a stroke control unit for controlling the drive motor (6) to rotate a preset stroke in a single rotation; and / or the motor controller has a stroke counting unit and an alarm unit, wherein the stroke counting unit triggers the alarm unit to send an alarm signal when the rotation stroke of the drive motor (6) reaches a preset rotation stroke.

7. The range hood according to any one of claims 1 to 4, characterized in that: A filter residue alarm device is provided at the position on the housing where the rotating shaft (4) is mounted, and the filter residue alarm device can send out an alarm signal when the filter roll (100) reaches or falls short of a preset residue.

8. The range hood according to any one of claims 1 to 4, characterized in that: The housing has a filter outlet, and a filter cutting portion (8) is provided at the filter outlet.

9. The range hood according to any one of claims 1 to 4, characterized in that: The range hood further comprises a matching filter roll (100), wherein the filter roll (100) is provided with a plurality of replacement units according to a single laying length, and a breakpoint-type press-joint seam is provided between two adjacent replacement units.

10. The range hood according to any one of claims 1 to 4, characterized in that: The pressing portion (7) is a protrusion arranged on the outer wall of the shell (1).

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