Range hood and filter screen thereof
By introducing a plug-in protrusion and a guide channel into the range hood filter, the problem of grease seepage is solved, achieving better grease removal and cleaning performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-03-10
AI Technical Summary
The filters in existing range hoods are prone to causing grease to seep out from the seams, which is a nuisance for users.
Design a filter screen including an oil filter element fixed together and a plug-in protrusion. The plug-in protrusion is inserted into the mounting hole of the range hood. The free end of the oil discharge channel is located inside the mounting hole. Combined with the oil-blocking fold and the flow guide channel, the effective collection and discharge of grease can be achieved.
It effectively prevents grease from seeping out from the seams, improves the grease drainage effect, facilitates cleaning, and ensures that grease can be smoothly collected and drained into the grease cup.
Smart Images
Figure CN223985228U_ABST
Abstract
Description
[Technical Field]
[0001] This application relates to the field of range hoods, and more particularly to the filters of range hoods. [Background Technology]
[0002] In Asia, the traditional cooking method of stir-frying results in fumes with a particularly high oil content. Therefore, range hoods, used to extract cooking fumes, have become an essential household appliance. As people's demands for quality of life continue to rise, range hoods are constantly being upgraded and improved.
[0003] Range hoods are generally equipped with filters. These filters are used to filter out grease from the cooking fumes as they are extracted by the range hood, and then drain the grease into the grease cup inside the hood. Most existing range hood filters have grease drainage holes (9) to facilitate grease discharge. Figure 1 As shown. Figure 1 There are two oil leakage holes 9 in total, both of which are located at the edge of the body of the range hood. As a result, the grease discharged from the oil leakage holes 9 can easily seep out from the gap of the overlap, causing trouble for the user.
[0004] Unless there is sufficient evidence to support it, the prior art described herein does not imply an admission that such prior art was known to a person skilled in the art prior to the filing date of this application. [Summary of the Invention]
[0005] One objective of this application is to provide an improved range hood and its filter, addressing at least one of the above-mentioned technical problems and / or other possible technical problems not mentioned in this application.
[0006] According to a first aspect of this application, embodiments of this application provide a filter screen for a range hood. The filter screen includes an oil-filtering element and a plug-in protrusion fixed together. The plug-in protrusion is provided with an oil-draining channel suitable for discharging grease adhering to the oil-filtering element. The plug-in protrusion is configured to be inserted into a mounting hole of the range hood to fix the filter screen to the range hood, wherein the end face of the free end of the oil-draining channel is located inside the mounting hole. Therefore, the filter screen has good oil-draining effect and can, to a certain extent, prevent grease from seeping out from the overlapping gaps.
[0007] In one or more embodiments, the end face of the free end of the oil drain channel is U-shaped.
[0008] In one or more embodiments, the oil filter element has an upwardly extending oil-blocking flange at its edge; the oil-blocking flange has a notch, and the edge of the notch extends outward to form the insertion protrusion; the oil discharge channel passes through the notch.
[0009] In one or more embodiments, the oil-blocking flange surrounds the oil filter element. This helps to improve the oil-blocking effect of the oil-blocking flange and facilitates the guidance of grease to converge into the oil drainage channel.
[0010] In one or more embodiments, the oil filter element is generally in the shape of a square plate; the insertion protrusion extends along the width direction of the oil filter element.
[0011] In one or more embodiments, the number of the insertion protrusions is two; the two insertion protrusions are disposed on the same side of the oil filter element and are spaced apart by a certain distance.
[0012] In one or more embodiments, the oil filter element is provided with a plurality of elongated air inlets; the air inlets extend along the width direction of the oil filter element; the edges of the air inlets are provided with oil-blocking flanges; adjacent oil-blocking flanges are spaced apart to form a flow guide channel; the flow guide channel is configured to guide the grease filtered by the oil filter element to converge into the oil discharge channel.
[0013] In one or more embodiments, the oil filter element and the insertion protrusion are formed as a single piece; and / or
[0014] The filter screen is made by stamping from a single metal sheet; and / or
[0015] The insertion protrusion is made by bending a metal sheet.
[0016] According to a second aspect of this application, embodiments of this application provide a range hood, including a body, an oil cup, and a filter screen as described in any of the above claims; both the oil cup and the filter screen are disposed in the body; the body has an oil channel and a mounting hole; the oil channel is located inside the mounting hole; a plug-in protrusion is inserted into the mounting hole to fix the filter screen to the body, at which time the end face of the free end of the oil channel is located inside the mounting hole; the filter screen is arranged at an angle, and the end face of the free end of the oil channel is located at the lowest point of the filter screen; the oil cup is adapted to collect grease dripping from the end face of the free end of the oil channel. This facilitates the guidance of grease to converge into the oil channel, improves the oil drainage effect of the filter screen, and to a certain extent prevents grease from seeping out from the overlapping gaps.
[0017] In one or more embodiments, the filter screen is arranged at an angle downwards from front to back; the oil cup is located below the insertion protrusion. This facilitates the guidance of grease towards the oil discharge channel, and then discharges it into the oil cup.
[0018] In one or more embodiments, the filter screen is provided with a connector; when the insertion protrusion is inserted into the mounting hole, the connector is adapted to be detachably fixed to the body, thereby fixing the filter screen to the body.
[0019] It should be noted that, unless otherwise specified, the directional expressions such as "upward", "downward", "lowest point", and "arranged tilted downward from front to back" appearing in this application are based on the usual usage state of the range hood.
[0020] It should be noted that the terms "first" and "second" appearing in this specification are for descriptive purposes only and are not used to indicate relative importance; moreover, they do not define the number of features they define; furthermore, they do not define the logical or sequential relationship between the features they define.
[0021] The above-described technical solutions in this application are not intended to describe all possible implementations of this application. Throughout the application, numerous examples are provided to offer guidance, and these examples can be used in various feasible combinations. [Attached Image Description]
[0022] The following figures are for illustrative purposes only and do not limit the scope of this application, wherein:
[0023] Figure 1 This is a schematic diagram of the structure of an existing filter screen used in range hoods;
[0024] Figure 2 This is a schematic diagram of the structure of an embodiment of a filter screen for a range hood according to this application;
[0025] Figure 3 yes Figure 2 The assembly effect diagram of the filter screen embodiment shown is shown.
[0026] Figure 4 yes Figure 3 A magnified view of a portion of the structure shown.
[0027] Figure label:
[0028] 1-Oil filter, 2-Plug-in protrusion, 3-Oil drain channel, 4-Oil baffle, 5-Air inlet, 6-Connector, 7-Handle hole, 8-Mounting hole, 9-Oil leak hole.
Detailed Implementation Methods
[0029] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this application clearer, the following will provide a more detailed description of this application in conjunction with the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit the scope of protection of this application. Various embodiments may share the same view or multiple views for description, but not all features appearing in the same view should be interpreted as features that an embodiment must possess. Instead, they can be combined in any suitable manner as long as they are not technically mutually exclusive. Moreover, for the sake of brevity, different embodiments of different aspects may be presented in the same specific design; however, such presentation does not mean that embodiments of these aspects should appear together. The disassembly and / or combination of all possible embodiments and / or technical features should also take into account the description in the specification and what a person skilled in the art can directly and unambiguously determine based on the description in the specification.
[0030] This application proposes an embodiment of a filter screen for a range hood, including an oil filter element 1 and a plug-in protrusion 2 fixed together, such as... Figure 2 As shown. The insertion protrusion 2 is provided with an oil drain channel 3 suitable for the grease adhering to the oil filter element 1 to be discharged through it. In other words, when this filter is installed in a range hood, the grease adhering to the oil filter element 1 will be discharged along the oil drain channel 3 under the action of gravity, and then flow into the oil cup of the range hood.
[0031] The insertion protrusion 2 is configured to be inserted into the mounting hole 8 of the range hood to fix the filter screen to the range hood. At this time, the end face of the free end of the oil drain channel 3 is located inside the mounting hole 8. In other words, when the insertion protrusion 2 is inserted into the mounting hole 8 of the range hood to fix the filter screen to the range hood, the end face of the free end of the oil drain channel 3 is located inside the mounting hole 8. Figure 3 As shown. Specifically, during the installation of the filter screen to the range hood, the free end face of the oil drain channel 3 moves from the outside of the mounting hole 8 towards the mounting hole 8, then passes through the mounting hole 8 until the free end face of the oil drain channel 3 moves to the inside of the mounting hole 8. At this point, the insertion protrusion 2 is installed in place. It should be noted that the free end face of the oil drain channel 3 of the insertion protrusion 2 is located inside the mounting hole 8, resulting in better oil drainage and, to a certain extent, preventing grease from seeping out from the overlap gap.
[0032] It is evident that the insertion protrusion 2 serves two functions: firstly, to fix the filter screen; and secondly, to drain the grease adhering to the oil filter element 1. This integrates two functions and represents a breakthrough from the conventional function of the insertion protrusion 2 as "fixing the filter screen," proposing a novel inventive concept that combines the fixing pin and the oil drain channel 3 into one.
[0033] Oil filter element 1 is generally square plate-shaped, such as...Figure 2 As shown; specifically, the oil filter element 1 is generally rectangular in shape. The insertion protrusion 2 extends along the width direction of the oil filter element 1. "Width direction of the oil filter element 1" refers to... Figure 2 As indicated by the double-headed arrow W, the oil filter element 1 and the insert protrusion 2 are formed as a single piece. The filter screen is made by stamping from a single metal sheet; both the oil filter element 1 and the insert protrusion 2 are made by stamping from the same metal sheet; thus, there are fewer seams, making cleaning easier.
[0034] The insertion protrusion 2 is made of bent metal sheet and is shaped like a duckbill. The end face of the free end of the oil drain channel 3 is U-shaped, as shown in the image. Figures 2 to 4 As shown. The insertion protrusion 2 is designed in this way to facilitate the discharge of grease through the oil drain channel 3 and to help ensure the filter screen is properly secured.
[0035] Oil drain channel 3 is a U-shaped guide channel formed by bending a flat metal sheet twice. Oil drain channel 3 has open ends and an open top, with each open end being connected sequentially.
[0036] The number of insertion protrusions 2 is two, such as Figure 2 and 3 As shown, two insertion protrusions 2 are located on the same side of the oil filter element 1 and are spaced a certain distance apart. This helps to improve the fixation effect of the filter screen and, on the other hand, helps to improve the discharge efficiency of grease adhering to the oil filter element 1.
[0037] The oil filter element 1 has an upwardly extending oil-blocking flange 4 at its edge, such as... Figure 2 As shown. An oil-blocking flange 4 surrounds the oil filter element 1. The oil-blocking flange 4 is generally square-shaped. The oil-blocking flange 4 is formed by bending the edge of the "metal plate formed into a filter screen by stamping"; specifically, the oil-blocking flange 4 is formed by bending the edge of the "metal plate formed into a filter screen" upwards at approximately 90°. The oil-blocking flange 4 is designed to prevent grease adhering to the oil filter element 1 from overflowing and to guide the grease adhering to the oil filter element 1 towards the oil drain channel 3.
[0038] The oil-blocking flange 4 has a notch, and the edge of the notch extends outward to form an insertion protrusion 2. The oil drain channel 3 passes through the corresponding notch; in other words, the oil drain channel 3 is connected to the corresponding notch; thus, the grease flowing out of the notch will directly flow into the oil drain channel 3 and then be discharged.
[0039] The oil-blocking fold 4 is adapted to guide the grease adhering to the inner surface of the oil filter 1 to converge towards the notch. The grease that converges to the notch is adapted to pass through the notch and then flow into the oil drain channel 3, and then drip from the end face of the free end of the oil drain channel 3, and finally flow into the oil cup of the range hood.
[0040] Oil filter element 1 is provided with several elongated air inlets 5, such asFigure 2 As shown, the air inlets 5 are parallel to each other. Each air inlet 5 extends along the width direction of the oil filter element 1. "Width direction of the oil filter element 1" is as follows: Figure 2 The double-headed arrow W is shown in the diagram.
[0041] The edge of the air intake 5 is provided with an upward-extending oil baffle, such as... Figures 2 to 4 As shown, the oil-blocking flange is annular, surrounding the corresponding air inlet 5. Specifically, the corresponding oil-blocking flange is integrally formed at the same time as the air inlet 5 is formed during stamping.
[0042] The intervals between adjacent oil baffle flanges form a flow channel, such as Figures 2 to 4 As shown, the flow channel is configured to guide the grease filtered by the oil filter element 1 towards the oil discharge channel 3. In other words, when this filter is installed in a range hood, the grease adhering to the oil filter element 1 will flow along the flow channel under gravity and converge towards the oil discharge channel 3, then be discharged from the oil discharge channel 3 and flow into the oil cup of the range hood. Specifically, some flow channels guide the grease filtered by the oil filter element 1 directly to the oil discharge channel 3; others guide the grease filtered by the oil filter element 1 directly to the oil-blocking flange 4, which then guides the grease further towards the oil discharge channel 3.
[0043] This application also proposes an embodiment of a range hood, including a body, an oil cup, and the aforementioned filter embodiment. The body has an air duct. A fan is installed within the air duct; preferably, the fan is a centrifugal fan. The filter is also installed within the air duct. The filter is located below the fan.
[0044] When the range hood is turned on to extract the cooking fumes produced by the stove below, the fan operates, generating negative pressure and creating an airflow of cooking fumes. The filter is located upstream of the fan, following the direction of this airflow. In other words, when the fan is operating to extract the fumes, the airflow first passes through the filter and then flows towards the fan.
[0045] The oil cup and filter screen are both located within the main body. The main body has a grease channel and a mounting hole 8. The grease channel is located inside the mounting hole 8. The oil filter element 1 is located outside the mounting hole 8. Specifically, the oil filter element 1 is located at the air inlet of the range hood, such as... Figure 3 As shown.
[0046] The filter screen is arranged at an angle, with the insertion protrusion 2 located at the lowest point of the filter screen. Specifically, the filter screen is arranged at an angle downwards from front to back, as shown below. Figure 3As shown, the end face of the free end of the oil drain channel 3 is located at the lowest point of the filter screen. The grease filtered by the oil filter element 1 flows downward under the action of gravity. Due to the guidance of the oil-blocking fold 4, the grease gathers towards the gap. The grease that gathers at the gap passes through the gap and then flows into the oil drain channel 3. Then it drips from the end face of the free end of the oil drain channel 3 and flows into the oil cup of the range hood.
[0047] The oil cup is a recessed shape with its opening facing upwards. When the insertion protrusion 2 is inserted into the mounting hole 8, the oil cup is positioned below the insertion protrusion 2. The oil cup is suitable for collecting grease dripping from the grease channel.
[0048] The filter screen is equipped with a connector 6 and a handle hole 7, such as Figure 2 As shown. When the insertion protrusion 2 is inserted into the mounting hole 8, the connector 6 is adapted to be detachably fixed to the body of the range hood, thus fixing the filter screen to the range hood. In other words, the filter screen is fixed to the range hood through the combined action of the insertion protrusion 2 and the connector 6. Specifically, the connector 6 includes a permanent magnet, adapted to be attracted and fixed to the body. The handle hole 7 allows the user to hold the filter screen when removing or installing it.
[0049] There are two filters. The two filters are joined together, as shown below. Figure 3 As shown, the individual filter screens are small in size, making them easy to place in a dishwasher for automatic cleaning.
[0050] When the fan is running, it creates negative pressure, generating a stream of oily fumes. The oily fumes first flow through the filter, then through the fan, and then out of the range hood, flowing through the exhaust pipe and into the public flue.
[0051] As an example, in another embodiment of the range hood proposed in this application, the connector 6 includes a snap-fit structure. This embodiment focuses on illustrating the differences from the above embodiments; for the same or similar parts of this embodiment, please refer to the above embodiments.
[0052] In another embodiment of the range hood proposed in this application, the oil filter 1 and the insertion protrusion 2 are manufactured separately and then assembled together. Specifically, the separately manufactured oil filter 1 and the insertion protrusion 2 are assembled together by welding, riveting, bonding, bolting and / or screwing. This embodiment focuses on illustrating the differences from the above embodiments; the same or similar parts of this embodiment can be referred to in the above embodiments.
[0053] In another embodiment of the range hood proposed in this application, when the insertion protrusion 2 is inserted into the mounting hole 8, the end face of the free end of the oil drain channel 3 is located at the opening of the grooved oil cup with the opening facing upwards. This embodiment focuses on illustrating the differences from the above embodiments; for the same or similar parts of this embodiment, please refer to the above embodiments.
[0054] In another embodiment of the range hood proposed in this application, an airflow inlet is provided at the bottom of the grease channel. Thus, the grease channel serves not only to transport grease but also as a channel for the flow of cooking fumes. This embodiment focuses on illustrating the differences from the above embodiments; similar or identical parts of this embodiment can be referred to in the above embodiments.
[0055] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of this application, even when only a single embodiment is described with respect to a particular feature. The feature examples provided in this application are intended to be illustrative and not limiting, unless explicitly stated otherwise. In practice, multiple features can be combined with each other where technically feasible and according to actual needs. Various substitutions, modifications, and alterations are also conceived without departing from the spirit and scope of this application.
Claims
1. A filter screen for a range hood, characterized in that: the filter screen comprises a filter element (1) and a plug-in protrusion (2) fixed together; the plug-in protrusion (2) is provided with an oil discharge channel (3) adapted for discharging oil adhering to the filter element (1) therefrom; and the plug-in protrusion (2) is adapted to be inserted into a mounting hole (8) of the range hood to fix the filter screen to the range hood, with the end face of the free end of the oil discharge channel (3) located inside the mounting hole (8).
2. The filter screen according to claim 1, characterized in that: the end face of the free end of the oil discharge channel (3) is U-shaped.
3. The filter screen according to claim 1 or 2, characterized in that: the filter element (1) is provided with an oil-blocking folded edge (4) extending upward at the edge thereof; the oil-blocking folded edge (4) is provided with a notch, with the edge of the notch extending outward to form the plug-in protrusion (2); and the oil discharge channel (3) penetrates the notch.
4. The filter screen according to claim 3, characterized in that: the oil-blocking folded edge (4) surrounds the filter element (1) in a circle.
5. The filter screen according to claim 3, characterized in that: the filter element (1) is in the shape of a square plate as a whole; and the plug-in protrusion (2) extends along the width direction of the filter element (1).
6. The filter screen according to claim 5, characterized in that: the number of the plug-in protrusions (2) is two; and the two plug-in protrusions (2) are located at the same side of the filter element (1) and are spaced apart by a certain distance.
7. The filter screen according to claim 5, characterized in that: the filter element (1) is provided with a plurality of strip-shaped air inlet holes (5); the air inlet holes (5) extend along the width direction of the filter element (1); the edges of the air inlet holes (5) are provided with oil-blocking flanges; adjacent oil-blocking flanges are spaced apart to form a flow guide channel; and the flow guide channel is adapted to guide the oil filtered out by the filter element (1) to converge to the oil discharge channel (3).
8. The filter screen according to claim 1 or 2, characterized in that: the filter element (1) and the plug-in protrusion (2) are formed as an integral piece; and / or the filter screen is made of a piece of metal plate punched and formed; and / or the plug-in protrusion (2) is made of a piece of metal sheet bent and formed.
9. A range hood, characterized in that: it comprises a machine body, an oil cup and a filter screen according to any one of the preceding claims; the oil cup and the filter screen are both arranged on the machine body; the machine body is provided with an oil channel and a mounting hole (8); the oil channel is located inside the mounting hole (8); the plug-in protrusion (2) is inserted into the mounting hole (8) to fix the filter screen to the machine body, with the end face of the free end of the oil discharge channel (3) located inside the mounting hole (8); the filter screen is arranged obliquely, with the end face of the free end of the oil discharge channel (3) located at the lowest point of the filter screen; and the oil cup is adapted to receive oil dripping from the end face of the free end of the oil discharge channel (3). 10. The extractor hood according to claim 9, characterized in that: - the filter grid is arranged inclined downward from front to back; - the oil cup is arranged below the plug-in protrusion (2).
11. The extractor hood according to claim 9, characterized in that: - the filter grid is provided with a coupling element (6); - the coupling element (6) is adapted to be detachably fixed to the housing when the plug-in protrusion (2) is inserted into the mounting hole (8) and to fix the filter grid to the housing.