Oil screen device and range hood

Abstract

The utility model relates to an oil screen device and a range hood, the oil screen device comprises a first oil screen and a second oil screen which are sequentially arranged along the airflow direction at an air inlet, and the second oil screen is driven by a driving mechanism to do linear movement relative to the first oil screen along a first direction; the first guide module is detachably connected to the back face of the first oil screen and comprises a first positioning seat, a first guide rod and a first reset spring, the first positioning seat is provided with a first sliding way extending in the moving direction of the second oil screen, and the first guide rod axially slides and is limited in the first sliding way; one end of the first guide rod is exposed out of the first slide way and serves as a first connecting end connected with the second oil screen, the first reset spring is arranged in the first slide way and acts on the first guide rod, so that the first guide rod always has the trend of moving in the second direction, and the first direction is opposite to the second direction and is parallel to the extending direction of the second oil screen. The device has the advantages of convenience and rapidness in disassembly and assembly and easiness in cleaning.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to an oil filter device and a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Range hoods typically include top-mounted and side-mounted types. Side-mounted range hoods utilize the principle of vortex air pressure to absorb most of the cooking fumes close to the stove in an arc shape, reducing adverse effects on human health. Moreover, since the power source is closer to the stove, it does not significantly reduce the suction efficiency of the power source.

[0003] Traditional range hoods typically use a fixed, integrated oil filter. When cooking on one side of the kitchen, the airflow cannot be effectively utilized to extract the fumes. This results in smoke escaping easily when cooking on a low setting, while the range hood becomes too noisy at high settings, failing to achieve efficient and quiet extraction. A similar range hood is disclosed in Chinese invention patent application number 202010058463.9.

[0004] To rationally allocate the air intake volume of a range hood and effectively utilize its airflow for fume extraction, Chinese utility model patent application CN202120687387.8 (authorization announcement number CN215570676U) discloses an air intake component and a range hood using the same component. The air intake component includes a panel with a first oil filter at the air inlet. Two first oil filters are present, with one end of each filter close to the other and the other end far apart. The component also includes a second oil filter, with each first oil filter corresponding to one second oil filter. The second oil filters can move away from or towards the other second oil filter. Each second oil filter can be in a first position and a second position. In the first position, the second oil filter cooperates with the first oil filter to fully open the air inlet. In the second position, the second oil filter cooperates with the first oil filter to partially open the air inlet. The position of the oil mesh is adjusted and reset via spring assemblies. The body of each spring assembly is fixed to the side of the first oil mesh facing inwards from the housing, and the pressure head of each spring assembly abuts against the opposite ends of the two second oil meshes. When the transmission rod drives the cam to rotate in a certain direction, the corresponding second oil mesh slides towards the corresponding elastic element, causing the elastic element to be compressed. When the transmission rod rotates in the opposite direction, the force of the cam on the stop on the second oil mesh disappears, and the second oil mesh slides back to its original position under the restoring force of the elastic element. A limiting guide rail is provided on the flange of the first oil mesh, and inserts that slide and engage with the limiting guide rail are formed at the upper and lower ends of the second oil mesh. The limiting guide rail serves to guide and limit the sliding of the second oil mesh. A limiting guide groove extending left and right is formed on the limiting guide rail, penetrating the end of the limiting guide rail of the corresponding first oil mesh away from the other first oil mesh; the penetrating end constitutes the entrance of the limiting guide groove.

[0005] However, the air intake components in the aforementioned patent applications still have certain shortcomings. The spring assembly and the limiting guide rail in the aforementioned patent applications are both fixed to the first oil screen. The inner oil screen can only be moved laterally during installation and disassembly. However, since the side operating space of the oil screen device is relatively small, it is very laborious to install and disassemble the inner oil screen, resulting in low efficiency. On the other hand, since the spring assembly and the limiting guide rail are both fixed to the first oil screen, it is also easy to make the oil screen very inconvenient to clean, resulting in dead corners for hygiene.

[0006] Therefore, the existing oil filter devices in range hoods still need further improvement. Utility Model Content

[0007] The first technical problem to be solved by this utility model is to provide an oil filter device that is easy to assemble and disassemble and easy to clean, in light of the current state of the technology.

[0008] The second technical problem to be solved by this utility model is to provide a range hood that uses the above-mentioned oil mesh device, in view of the current state of the prior art.

[0009] The technical solution adopted by this utility model to solve the first technical problem is as follows:

[0010] An oil mesh device is arranged at the air inlet of a range hood, including a first oil mesh and a second oil mesh arranged sequentially along the airflow direction at the air inlet. The first oil mesh is provided with a first air inlet hole, and the second oil mesh is provided with a second air inlet hole. The second oil mesh is driven by a driving mechanism and can move linearly relative to the first oil mesh along a first direction, thereby changing the relative position of the second air inlet hole on the second oil mesh and the first air inlet hole on the first oil mesh.

[0011] It also includes a first guide module detachably connected to the back of the first oil mesh. The first guide module includes a first positioning seat, a first guide rod, and a first return spring. The first positioning seat has a first slide rail extending along the moving direction of the second oil mesh. The first guide rod is axially slidably limited in the first slide rail, and one end protrudes outside the first slide rail as a first connection end connected to the second oil mesh. The first return spring is disposed in the first slide rail and acts on the first guide rod, so that the first guide rod always has a tendency to move along the second direction. The first direction is opposite to the second direction and is parallel to the extending direction of the second oil mesh.

[0012] To simplify the detachable connection structure between the first guide module and the first oil mesh, the first guide module is magnetically connected to the back of the first oil mesh, and the back of the first oil mesh is also provided with a first limiting stop to restrict the movement of the first guide module along a first direction. The aforementioned first limiting stop restricts the first guide module in the extending direction of the back of the first oil mesh, preventing slippage on the back of the first oil mesh due to insufficient magnetic attraction.

[0013] As an improvement, the first guide module is arranged adjacent to the side edge of the first oil mesh, and the side edge of the first oil mesh has a first folded edge that folds and extends toward the side where the second oil mesh is located. The first positioning seat abuts against the first folded edge, and the first folded edge constitutes the first limiting stop.

[0014] As an improvement, the first positioning seat is provided with a first magnetic element for adsorbing the first oil mesh.

[0015] To prevent the first elastic element, the first magnetic element, and the first guide post from being contaminated by oil and affecting their normal operation, the first positioning seat includes a first seat body and a first cover covering the first seat body. The first cover and the first seat body together define the first slide and the first mounting cavity for placing the first magnetic element.

[0016] In order to limit the first oil mesh and the second oil mesh in the front-back direction, the first oil mesh also has two second folded edges that are opposite each other and both folded and extend toward the side where the second oil mesh is located. One of the second folded edges has a first opening groove extending along the length direction of the second folded edge. There are two first guide modules, which are respectively arranged on the upper and lower sides of the back of the first oil mesh. The first positioning seat of one of the first guide modules has a first insert that extends outward and can be movably limited in the first opening groove.

[0017] To ensure the stability of the movement of the second oil mesh relative to the first oil mesh, a second guide module is also included, which is detachably connected to the back of the first oil mesh. The second guide module is magnetically connected to the back of the first oil mesh. The second guide module includes a second positioning seat and a second guide rod. The second positioning seat has a second slide rail extending along the movement direction of the second oil mesh. The second guide rod is axially slidably limited in the second slide rail, and one end protrudes outside the second slide rail as a second connecting end connected to the second oil mesh. The second connecting end of the second guide rod and the first connecting end of the first guide rod are two ends that are close to each other. The back of the first oil mesh is also provided with a second limiting stop for restricting the movement of the second guide module along the second direction.

[0018] To ensure the secure installation of the second oil mesh, the first oil mesh has two opposite side edges in the direction of movement of the first oil mesh. Each of these two side edges has a first folded edge extending towards the side where the second oil mesh is located. When the second oil mesh, the first guide module, and the second guide module are in the installed position, the first positioning seat abuts against one of the first folded edges, the second positioning seat abuts against the other first folded edge, and the first return spring is in a compressed state.

[0019] To further ensure the secure installation of the second oil mesh, the second guide module also includes a second return spring. The second return spring is located within the second slide rail and acts on the second guide rod, ensuring that the second guide rod always tends to move along the first direction. The elastic coefficient of the second return spring is less than that of the first return spring. By having the first and second return springs, with opposite return forces, act together on the second oil mesh, neither the first nor the second return spring deforms during the movement of the second oil mesh. This ensures that the second oil mesh can move and return smoothly and accurately, avoiding jamming and guaranteeing the reliability of the mechanism. In particular, by changing the elastic coefficients of the two return springs, the initial position of the second oil mesh can also be adjusted, improving the flexibility of oil mesh airflow regulation.

[0020] As an improvement, the second positioning seat is provided with a second magnetic element for adsorbing the first oil mesh.

[0021] To prevent the second elastic element, the second magnetic element, and the second guide post from being contaminated by oil and affecting their normal operation, the second positioning seat includes a second seat body and a second cover that covers the second seat body. The second cover and the second seat body together define the second slide and the second mounting cavity for accommodating the second magnetic element.

[0022] As an improvement, the first oil mesh also has two upper and lower opposing second folded edges that extend towards the side where the second oil mesh is located. One of the second folded edges has a second opening groove extending along the length direction of the second folded edge. There are two second guide modules, which are respectively arranged on the upper and lower sides of the back of the first oil mesh. One of the second guide modules has a second insert extending outward and movable in the second opening groove on its second positioning seat.

[0023] To facilitate connection with the corresponding guide rods, the second oil mesh has a first side and a second side that are opposite to each other and parallel to the direction of movement of the second oil mesh. The first side and the second side are provided with a first arm and a second arm that are spaced apart along the direction of movement of the second oil mesh and extend outward from the side. There are two first guide modules, which are also arranged on the upper and lower sides of the back of the first oil mesh. The first connecting ends of the two first arms and the two first guide rods are detachably connected, and the second connecting ends of the two second arms and the two second guide rods are detachably connected.

[0024] To accommodate the two burners at the bottom of the range hood and facilitate targeted airflow adjustment based on cooking conditions on both sides, the first oil mesh has a first air intake area and a second air intake area, each with a first air intake hole arranged sequentially along a first direction. There are two second oil meshes arranged sequentially along the first direction. One second oil mesh faces the first air intake area of ​​the first oil mesh, and the other faces the second air intake area of ​​the first oil mesh. Both second oil meshes are driven by the same drive mechanism and can move relative to the first oil mesh, thereby changing the air intake state of the air intake area on the side where the second oil mesh is located. The two air intake areas on the first oil mesh (i.e., the first air intake area and the second air intake area) can be two areas on a single integrated oil mesh, or they can be air intake areas corresponding to two independent sub-oil meshes.

[0025] The technical solution adopted by this utility model to solve the second technical problem is: a range hood, including a housing, an air inlet on the housing, and an oil screen at the air inlet, wherein the oil screen adopts the above-mentioned oil screen device.

[0026] Compared with the prior art, the advantages of this utility model are: the first guide module for realizing the linear movement of the second oil mesh relative to the first oil mesh is detachably connected to the back of the first oil mesh. When disassembling the second oil mesh, the first guide module can also be detached from the first oil mesh. This simplifies the frame structure of the first oil mesh, facilitates the cleaning of the first oil mesh, and eliminates cleaning dead zones. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of the oil mesh device according to Embodiment 1 of this utility model;

[0028] Figure 2 This is a three-dimensional structural schematic diagram of the oil mesh device according to Embodiment 1 of this utility model;

[0029] Figure 3 This is a three-dimensional structural diagram of the oil mesh device according to Embodiment 1 of this utility model;

[0030] Figure 4 for Figure 3 An exploded view of the oil mesh device shown;

[0031] Figure 5 for Figure 3 A further exploded view of the oil mesh device shown;

[0032] Figure 6 This is an exploded view of the first guide module of the oil mesh device according to Embodiment 1 of this utility model;

[0033] Figure 7 This is an exploded view of the second guide module of the oil mesh device according to Embodiment 1 of this utility model;

[0034] Figure 8 This is a three-dimensional structural diagram of the oil mesh device according to Embodiment 2 of this utility model;

[0035] Figure 9 This is an exploded view of the oil mesh device of Embodiment 2 of this utility model. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0038] Example 1

[0039] Figures 1-7 This illustration shows a preferred embodiment of the oil filter device and range hood of this utility model. The range hood includes a housing and a centrifugal fan disposed within the housing. The housing generally includes a fan frame and a smoke collection hood disposed at the bottom of the fan frame, with the inner cavity of the fan frame communicating with the inner cavity of the smoke collection hood. An air inlet is provided on the front side wall of the smoke collection hood, allowing external fumes to enter the hood. The centrifugal fan is disposed within the fan frame; during operation, the centrifugal fan generates negative pressure, drawing external fumes into the smoke collection hood through the air inlet. An oil filter device is also provided at the air inlet of the smoke collection hood for filtering fumes. An oil cup, which is an elongated strip extending laterally, is provided at the bottom of the smoke collection hood to collect oil stains flowing down from the hood.

[0040] Figure 1 and Figure 2The diagrams show the three-dimensional structure of the oil mesh device from the front and back angles of this embodiment. The oil mesh device includes a first oil mesh 10 and a second oil mesh 20 disposed on the back of the first oil mesh 10, that is, the first oil mesh 10 and the second oil mesh 20 are arranged sequentially along the airflow direction at the air inlet. The first oil mesh 10 is provided with a first air inlet hole 100, and the second oil mesh 20 is provided with a second air inlet hole 200, wherein both the first air inlet hole 100 and the second air inlet hole 200 are strip-shaped holes with the same extension direction. The first oil mesh 10 has a first air inlet area 101 and a second air inlet area 102, which are arranged sequentially along the first direction A1 and each has a first air inlet hole 100 distributed thereon. There are two second oil meshes 20, which are also arranged sequentially along the first direction A1. One second oil mesh 20 is opposite to the first air inlet area 101 of the first oil mesh 10, and the other second oil mesh 20 is opposite to the second air inlet area 102 of the first oil mesh 10. More specifically, the first oil mesh 10 includes two sub-oil meshes 11 arranged sequentially along the first direction A1, which together constitute the first air inlet area 101 and the second air inlet area 102 of the first oil mesh 10. The second oil mesh 20 can be driven by a drive mechanism to move linearly relative to the first oil mesh 10 along the first direction A1, wherein the first direction A1 is parallel to the extension direction of the first oil mesh 10. When the second oil mesh 20 moves relative to the first oil mesh 10, the relative position of the second air inlet 200 on the second oil mesh 20 and the first air inlet 100 on the first oil mesh 10 changes. As a result, the area of ​​overlap between the first air inlet 100 and the second air inlet 200 in the flow direction of the air inlet changes, thereby achieving the purpose of regulating the air intake volume.

[0041] One of the sub-oil meshes 11 of the first oil mesh 10 and the corresponding second oil mesh 20 constitute an oil mesh unit. The oil mesh device in this embodiment includes two oil mesh units sequentially spliced ​​together, arranged symmetrically. The movement of the second oil meshes 20 in the two oil mesh units is independent, and the adjustment of the air intake volume is also independent, thus adapting to the cooking conditions on both sides of the range hood. In this embodiment, the two second oil meshes 20 are driven by the same drive mechanism and can move relative to the first oil mesh 10 (corresponding sub-oil mesh 11), thereby changing the air intake state of the air intake area on the side where the second oil mesh 20 is located. The drive mechanism is generally located at the junction of the two oil mesh units. The drive mechanism for moving the second oil mesh 20 can adopt various motion mechanisms formed by the cooperation of a drive motor and a swing arm or cam transmission, such as the motion mechanism of Chinese utility model patent application number CN202120687387.8 (authorization announcement number: CN215570676U).

[0042] Taking an oil mesh unit formed by the cooperation of one of the sub-oil meshes 11 of the first oil mesh 10 and the corresponding second oil mesh 20 as an example, the first oil mesh 10 (sub-oil mesh 11) has two opposite sides in a first direction. Each of these two sides has a first folded edge 12 extending towards the side where the second oil mesh 20 is located. The extension direction of the two first folded edges 12 is perpendicular to the first direction. These two first folded edges 12 respectively constitute a first limiting stop for restricting the movement of the first positioning seat in the first direction and a second limiting stop for restricting the movement of the second positioning seat in the second direction.

[0043] The first oil mesh 10 also has two opposite sides in a direction perpendicular to the first direction. Each of the two sides of the first oil mesh 10 has a second folded edge 13 that extends toward the side where the second oil mesh 20 is located. The extension direction of the two second folded edges 13 is parallel to the first direction.

[0044] The first oil mesh 10 has guide modules at the four corners of its back side. The guide modules at the two corners away from the drive mechanism are referred to as the first guide modules 30, and the guide modules at the two corners adjacent to the drive mechanism are referred to as the second guide modules 40.

[0045] The back of the first oil mesh 10, where both the first guide module 30 and the second guide module 40 are detachably connected. The second oil mesh 20 has a first side and a second side that are vertically opposite each other and parallel to the direction of movement of the second oil mesh 20. Each of the first and second sides has a first arm 21 and a second arm 22 that are spaced apart along the direction of movement of the second oil mesh 20 and extend outward from that side. The two first arms 21 on the second oil mesh 20 are respectively connected to the two first guide modules 30, and the two second arms 22 are respectively connected to the two second guide modules 40.

[0046] See Figure 5 and Figure 6The first guide module 30 includes a first positioning seat 31, a first guide rod 32, and a first elastic element 34. The first positioning seat 31 is an elongated cuboid structure, including a first seat body 314 and a first cover 313. The first cover 313 is connected to the first seat body 314 by multiple extending elastic buckles 3130. After the first cover 313 and the first seat body 314 are engaged, they define a first slide 310 extending along the first direction A1. The first slide 310 is a stepped channel structure with a large diameter in the middle and small diameters on the left and right sides (having two steps). The first guide rod 32 is axially slidably limited in the first slide 310, and one end protrudes outside the first slide 310 to serve as a first connecting end 321 connected to the first support arm 21 of the second oil mesh 20. The first elastic element 34 is preferably a first return spring, which is located in the middle section of the first slide 310, specifically sleeved outside the first guide rod 32. The first guide rod 32 has a first limiting stop 320 that protrudes radially outward. The first guide rod 32 is also fitted with a first limiting sleeve 33 (preferably a metal sleeve with a certain strength). The first limiting sleeve 33 is also located in the middle section of the first slide rail 310. The outer diameter of the first limiting sleeve 33 is larger than the diameter of the small hole section of the first slide rail 310. Thus, the first limiting sleeve 33 can abut against one step of the first slide rail 310, while the first limiting stop 320 of the first guide rod 32 can abut against another step of the first slide rail 310. The first reset spring is located between the first limiting stop 320 and the first limiting sleeve 33 of the first guide rod 32. That is, one end of the first reset spring abuts against the first limiting stop 320 of the first guide rod 32, and the other end abuts against the first limiting sleeve 33. Under the action of the first reset spring, the first guide rod 32 always has the tendency to move along the second direction A2. The second direction A2 is opposite to the first direction A1 and is parallel to the extension direction of the second oil mesh 20.

[0047] See Figure 7The second guide module 40 includes a second positioning seat 41, a second guide rod 42, and a second elastic element 44. The second positioning seat 41 is an elongated cuboid structure, including a second seat body 414 and a second cover 413. The second cover 413 is connected to the second seat body 414 by multiple extending elastic buckles. After the second cover 413 and the second seat body 414 are engaged, they define a second slide 410 extending in a first direction. The second slide 410 is a stepped channel structure with a large diameter in the middle and small diameters on the left and right sides (having two steps). The second guide rod 42 is axially slidably limited in the second slide 410, and one end protrudes outside the second slide 410 to serve as a second connecting end 421 connected to the second support arm 22 of the second oil mesh 20. The second elastic element 44 is preferably a second return spring, which is located in the middle section of the second slide 410, specifically sleeved outside the second guide rod 42. The second guide rod 42 has a radially outwardly protruding second limiting stop 420. A second limiting sleeve 43 (preferably a metal sleeve with a certain strength) is also fitted onto the second guide rod 42. This second limiting sleeve 43 is also located within the middle section of the second slide rail 410. The outer diameter of the second limiting sleeve 43 is larger than the diameter of the small hole section of the second slide rail 410. Therefore, the second limiting sleeve 43 can abut against one step of the second slide rail 410, while the second limiting stop 420 of the second guide rod 42 can abut against another step of the second slide rail 410. The aforementioned second return spring is located between the second limiting stop 420 of the second guide rod 42 and the second limiting sleeve 43. That is, one end of the second return spring abuts against the second limiting stop 420 of the second guide rod 42, and the other end abuts against the second limiting sleeve 43. Under the action of the second return spring, the second guide rod 42 always has a tendency to move along the first direction.

[0048] The first connecting end 321 of the first guide rod 32 of the first guide module 30 and the second connecting end 421 of the second guide rod 42 of the second guide module 40 are arranged adjacent to each other. That is, the first guide module 30 and the second guide module 40 are basically symmetrically arranged about the center line L of the sub-oil mesh 11 of the first oil mesh 10.

[0049] The first arm 21 of the second oil mesh 20 is detachably connected to the first connecting ends 321 of the two first guide rods 32, and the two second arms 22 of the second oil mesh 20 are detachably connected to the second connecting ends 421 of the two second guide rods 42.

[0050] The end of the first arm 21 has a first rolled flange 211, and the end of the first rolled flange 211 also has a first limiting notch 2110. Due to the limitation of processing precision, the first rolled flange 211 cannot be directly inserted into the end of the first guide rod 32, otherwise there will be a problem of shaking. Therefore, the first rolled flange 211 is provided with a first bushing 23 (preferably made of plastic) for the first connecting end 321 of the first guide rod 32 to pass through. The first bushing 23 includes a first bushing body 231 and at least two first elastic arms 232 arranged sequentially at intervals along the circumference of the first bushing body 231 and extending axially. Since the first elastic arms 232 can swing, the internal space enclosed by each first elastic arm 232 can also contract or expand radially. Each first elastic arm 232 also has a first protrusion 2320 that protrudes radially outward at a section away from the first bushing body 231. The end of the first bushing body 231 has a first limiting flange 233 that protrudes radially outward. When the first bushing 23 is installed in the first rolled flange 211, the first limiting flange 233 abuts against the end of the first rolled flange 211, and the first protrusions 2320 of each first spring arm 232 are correspondingly engaged in the first limiting recesses 2110 of the first rolled flange 211, thereby achieving axial and circumferential limiting of the first bushing 23 by the first rolled flange 211. When installing the first guide module 30, the first connecting end 321 of the first guide rod 32 can be directly inserted into the first bushing 23. Similarly, the end of the second support arm 22 has a second rolled flange 221, and the end of the second rolled flange 221 is also provided with a second limiting recess 2210. The second rolled flange 221 contains a second bushing 24 (preferably made of plastic) through which the second connecting end 421 of the second guide rod 42 passes. The second bushing 24 includes a second bushing body 241 and at least two second spring arms 242 arranged sequentially at intervals along the circumference of the second bushing body 241 and extending axially. Since the second spring arms 242 can swing, the internal space enclosed by each second spring arm 242 can also contract or expand radially. Each second spring arm 242 also has a second protrusion 2420 that protrudes radially outward at a section away from the second bushing body 241. The end of the second bushing body 241 has a second limiting flange 243 that protrudes radially outward. With the second bushing 24 installed in the second rolled flange 221, the second limiting stop 243 abuts against the end of the second rolled flange 221, and the second protrusions 2420 of each second spring arm 242 are correspondingly engaged into the second limiting recesses 2210 of the second rolled flange 221. This allows the second rolled flange 221 to limit the second bushing 24 in both the axial and circumferential directions. When installing the second guide module 40, the second connecting end 421 of the second guide rod 42 can be directly inserted into the second bushing 24.

[0051] The first oil mesh 10 is a metal mesh that can be attracted by a magnetic component. A first positioning seat 31 is provided with a first magnetic component 35 for attracting the first oil mesh 10. Specifically, the first magnetic component 35 is disposed within the first positioning seat 31, and the first positioning seat 31 has a first mounting cavity 311 for mounting the first magnetic component 35. A second positioning seat 41 is provided with a second magnetic component 45 for attracting the first oil mesh 10. Specifically, the second magnetic component is disposed within the second positioning seat 41, and the second positioning seat 41 has a second mounting cavity 411 for mounting the second magnetic component.

[0052] A first opening groove 131 and a second opening groove 132 are provided on the second folded edge 13 on the lower side of the first oil mesh 10. The first opening groove 131 corresponds to the installation position of the first guide module 30, and the second opening groove 132 corresponds to the installation position of the second guide module 40. Both the first opening groove 131 and the second opening groove 132 extend along the length direction of the second folded edge 13. The first positioning seat 31 of the first guide module 30 located on the lower side has an outwardly extending first insert 312, and the second positioning seat 41 of the second guide module 40 located on the lower side has an outwardly extending second insert 412. After the first guide module 30 is installed in place, the first insert 312 can be movably limited in the first opening groove 131 along the length direction of the second folded edge 13. After the second guide module 40 is installed in place, the second insert 412 can be movably limited in the second opening groove 132 along the length direction of the second folded edge 13. This achieves the limitation of the second oil mesh 20 by the first oil mesh 10 in the front-back direction.

[0053] The installation process of the combined structure of the oil mesh device in this embodiment is as follows:

[0054] 1. Install the corresponding bushings in the four rolled edges of the second oil mesh 20.

[0055] 2. Insert the first connecting end 321 of the first guide rod 32 of the first guide module 30 and the second connecting end 421 of the second guide rod 42 of the second guide module 40 into the corresponding bushing in the rolled flange.

[0056] 3. First, apply force to the lower first guide module 30 and second guide module 40 in the direction that the corresponding return spring is compressed, and place them between the two lower first folded edges 12 of the first oil mesh 10 (sub-oil mesh 11). Remove the force, and the first guide module 30 and second guide module 40 will abut against the inner side of the first folded edges 12 on the left and right sides of the first oil mesh 10 under the restoring force of the return spring. At this time, the first insert 312 on the first guide module 30 and the second insert 412 on the second guide module 40 will be locked in the corresponding opening slots on the lower second folded edge 13 of the first oil mesh 10. The lower first guide module 30 and second guide module 40 are now positioned and installed.

[0057] 4. Flip the second oil mesh 20, and at the same time apply force to the upper first guide module 30 and second guide module 40 in the direction that the return spring is compressed. Under the action of the corresponding magnetic components, the first guide module 30 and second guide module 40 are attracted to the inner side of the first oil mesh 10. Remove the force, and the upper first guide module 30 and second guide module 40 abut against the inner side of the first folded edge 12 on the left and right sides of the first oil mesh 10 respectively under the restoring force of the return spring. The upper first guide module 30 and second guide module 40 are thus positioned and installed.

[0058] 5. The entire oil mesh device assembly structure is now installed.

[0059] The disassembly process of the combined structure of the oil mesh device in this embodiment is as follows:

[0060] 1. The user holds the first guide module 30 and the second guide module 40 on the upper side with both hands and lifts them upwards away from the first oil mesh 10. The force of the corresponding magnetic components no longer acts on the first oil mesh 10.

[0061] 2. Pull the entire second oil mesh 20 diagonally upwards, and the second oil mesh 20 and the corresponding guide module will separate from the first oil mesh 10.

[0062] 3. Users can choose to disassemble each guide module to facilitate cleaning of the first oil screen 10, the second oil screen 20, and each guide module.

[0063] Taking the left oil mesh unit of the oil mesh device as an example, the movement process of the second oil mesh 20 is explained. The elastic coefficient k1 of the first return spring of the first guide module 30 is greater than the elastic coefficient of the second return spring of the second guide module 40. After the second oil mesh 20 and the corresponding guide module are installed, both the first spring and the second spring are in a compressed state. The force generated by the compression of the first spring is F1, and the force generated by the compression of the second spring is F2. F1 > F2. At this time, it can be ensured that the force applied by the two springs to the left second oil mesh 20 is horizontal to the right. Therefore, the initial position of the left second oil mesh 20 is that its rightmost side abuts against the rightmost end of the first oil mesh 10. At this time, the second air inlet 200 of the second oil mesh 20 and the first air inlet 100 of the first air inlet area 101 of the first oil mesh 10 are completely overlapped, and the air inlet area is the largest.

[0064] When the drive mechanism (not shown in the figure) acts on the right side of the second oil mesh 20 on the left and pushes it to move to the left, the two rolled flanges on the right side of the second oil mesh 20 respectively push the second guide rods 42 of the two second guide modules 40 to move to the left. At this time, under the action of the restoring force F2 of the second spring, the two second guide modules 40 move to the left synchronously with the second oil mesh 20. When the second oil mesh 20 moves one stroke, that is, the distance of one grid, the second air inlet 200 of the second oil mesh 20 (or the first air inlet 100 of the first oil mesh 10) is completely closed. At this time, the first spring is compressed to its maximum value, and its output... The force generated is F1', F1'>F1, the second spring is compressed to its minimum value, and the force it generates is 0≤F2'<F2. When the drive mechanism moves in the opposite direction (that is, after the pressure on the second oil mesh 20 is released), the second oil mesh 20 moves to the right under the restoring force of the first spring. At the same time, the second oil mesh 20 pushes the first guide rods 32 of the two first guide modules 30 to move to the right. The force generated by the first spring gradually decreases, and the force generated by the second spring gradually increases. When the force of the first spring decreases to F1 and the force of the second spring increases to F2, the second oil mesh 20 moves back to its initial position, at which time the air intake area is at its maximum.

[0065] In this embodiment, the oil mesh device utilizes the combined action of a first elastic element 34 and a second elastic element 44 with opposite resetting elastic forces on the second oil mesh 20. This ensures that neither the first elastic element 34 nor the second elastic element 44 deforms during the movement of the second oil mesh 20, guaranteeing smooth and precise movement and resetting, preventing jamming, and ensuring the reliability of the mechanism. Furthermore, by changing the elastic coefficients of the two elastic elements, the initial position of the second oil mesh 20 can be adjusted, improving the flexibility of oil mesh airflow regulation.

[0066] In this embodiment, the inner and outer oil filters (second oil filter 20 and first oil filter 10) achieve two main functions: detachability and mobility, through corresponding guide modules. The detachable function allows for quick separation of the inner and outer oil filters, facilitating individual cleaning of each part. The mobility function enables the range hood to distribute airflow, optimizing the user's cooking experience based on actual cooking conditions. The four guide modules are independent, allowing for complete and quick detachment of the guide modules, first oil filter 10, and second oil filter 20. The guide modules integrate various components (guide rods, return springs, etc.), ensuring the simplicity and reliability of the frame structure. The sealing of the guide modules reduces oil contamination of the guide rods, return springs, and other components, ensuring the reliability of the second oil filter 20's movement along the guide rods. The second oil filter 20, through the guide modules, not only achieves quick installation and disassembly but also reciprocates relative to the first oil filter 10, thereby changing the air intake area of ​​the oil filter device, achieving airflow distribution, and optimizing the user's cooking experience.

[0067] Example 2

[0068] Figure 8 and Figure 9 This paper illustrates another preferred embodiment of the oil filter device and range hood of this utility model. The difference between this embodiment and Embodiment 1 is that the structure of the two second guide modules 40 is simplified. Specifically, the second limiting sleeve 43 and the second spring in the second guide module 40 are omitted. The second connecting end 421 of the second guide rod 42 is provided with a threaded rod structure with external threads and equipped with a nut. This integrates the second rolled flange 221 of the second oil filter 20 with the second guide rod 42, thus allowing the second guide rod 42 to move left and right via the second rolled flange 221 of the second oil filter 20, achieving the same movement effect as Embodiment 1. In particular, the first guide rod 32 of the two first guide modules 30 may or may not have a nut. Compared with Embodiment 1, this embodiment reduces the number of parts, simplifies the structure, and achieves the same effect.

Claims

1. An oil mesh device, arranged at the air inlet of a range hood, comprising a first oil mesh (10) and a second oil mesh (20) arranged sequentially along the airflow direction at the air inlet, wherein the first oil mesh (10) is provided with a first air inlet hole (100), and the second oil mesh (20) is provided with a second air inlet hole (200), wherein the second oil mesh (20) is driven by a driving mechanism to move linearly relative to the first oil mesh (10) in a first direction, thereby changing the relative position of the second air inlet hole (200) on the second oil mesh (20) and the first air inlet hole (100) on the first oil mesh (10); Its features are: It also includes a first guide module (30) detachably connected to the back of the first oil mesh (10). The first guide module (30) includes a first positioning seat (31), a first guide rod (32) and a first return spring. The first positioning seat (31) has a first slide rail (310) extending along the moving direction of the second oil mesh (20). The first guide rod (32) is axially slidably limited in the first slide rail (310), and one end protrudes outside the first slide rail (310) as a first connection end (321) connected to the second oil mesh (20). The first return spring is provided in the first slide rail (310) and acts on the first guide rod (32), so that the first guide rod (32) always has a tendency to move along the second direction. The first direction is opposite to the second direction and is parallel to the extending direction of the second oil mesh (20). The first guide module (30) is magnetically connected to the back of the first oil mesh (10), and the back of the first oil mesh (10) is also provided with a first limiting stop for restricting the first guide module (30) from moving along the first direction.

2. The oil mesh device according to claim 1, characterized in that: The first guide module (30) is arranged adjacent to the side edge of the first oil mesh (10), and the side edge of the first oil mesh (10) has a first folded edge (12) extending towards the side where the second oil mesh (20) is located. The first positioning seat (31) abuts against the first folded edge (12), and the first folded edge (12) constitutes the first limiting stop.

3. The oil mesh device according to claim 1, characterized in that: The first positioning seat (31) is provided with a first magnetic element (35) for adsorbing the first oil mesh (10).

4. The oil mesh device according to claim 3, characterized in that: The first positioning seat (31) includes a first seat body and a first cover (313) covering the first seat body (314). The first cover (313) and the first seat body (314) together define the first slide (310) and a first mounting cavity (311) for mounting the first magnetic element (35).

5. The oil mesh device according to claim 1, characterized in that: The first oil mesh (10) also has two upper and lower opposite second folded edges (13) that are folded and extended toward the side where the second oil mesh (20) is located. One of the second folded edges (13) has a first opening groove (131) extending along the length direction of the second folded edge (13). There are two first guide modules (30), which are respectively arranged on the upper and lower sides of the back of the first oil mesh (10). The first positioning seat (31) of one of the first guide modules (30) has a first insert (312) that extends outward and can be movably limited in the first opening groove (131).

6. The oil mesh device according to claim 1, characterized in that: It also includes a second guide module (40) detachably connected to the back of the first oil mesh (10). The second guide module (40) is magnetically connected to the back of the first oil mesh (10). The second guide module (40) includes a second positioning seat (41) and a second guide rod (42). The second positioning seat (41) has a second slide rail (410) extending along the moving direction of the second oil mesh (20). The second guide rod (42) is axially slidably limited in the second slide rail (410), and one end protrudes outside the second slide rail (410) as a second connecting end (421) connected to the second oil mesh (20). The second connecting end (421) of the second guide rod (42) and the first connecting end (321) of the first guide rod (32) are two ends that are close to each other. The back of the first oil mesh (10) is also provided with a second limiting stop for restricting the movement of the second guide module (40) in the second direction.

7. The oil mesh device according to claim 6, characterized in that: The first oil mesh (10) has two opposite side edges in the direction of movement of the first oil mesh (10). Each of the two side edges has a first folded edge (12) that folds and extends toward the side where the second oil mesh (20) is located. When the second oil mesh (20), the first guide module (30) and the second guide module (40) are installed in place, the first positioning seat (31) abuts against one of the first folded edges (12), the second positioning seat (41) abuts against the other first folded edge (12), and the first return spring is in a compressed state.

8. The oil mesh device according to claim 7, characterized in that: The second guide module (40) further includes a second return spring, which is disposed in the second slide (410) and acts on the second guide rod (42), so that the second guide rod (42) always has the tendency to move along the first direction. The elastic coefficient of the second return spring is smaller than that of the first return spring.

9. The oil mesh device according to claim 6, characterized in that: The second positioning seat (41) is provided with a second magnetic element (45) for adsorbing the first oil mesh (10).

10. The oil mesh device according to claim 9, characterized in that: The second positioning seat (41) includes a second seat body (414) and a second cover (413) covering the second seat body (414). The second cover (413) and the second seat body (414) together define the second slide (410) and the second mounting cavity (411) for mounting the second magnetic element.

11. The oil mesh device according to claim 6, characterized in that: The first oil mesh (10) also has two upper and lower opposite second folded edges (13) that are folded and extended toward the side where the second oil mesh (20) is located. One of the second folded edges (13) has a second opening groove (132) extending along the length direction of the second folded edge (13). There are two second guide modules (40), which are respectively arranged on the upper and lower sides of the back of the first oil mesh (10). The second positioning seat (41) of one of the second guide modules (40) has a second insert (412) that extends outward and can be movably limited in the second opening groove (132).

12. The oil mesh device according to claim 11, characterized in that: The second oil mesh (20) has a first side and a second side that are opposite to each other and are parallel to the moving direction of the second oil mesh (20). The first side and the second side are provided with a first arm (21) and a second arm (22) that are spaced apart along the moving direction of the second oil mesh (20) and extend outward from the side. There are two first guide modules (30), which are also arranged on the upper and lower sides of the back of the first oil mesh (10). The two first arms (21) are detachably connected to the first connecting ends (321) of the two first guide rods (32). The two second arms (22) are detachably connected to the second connecting ends (421) of the two second guide rods (42).

13. The oil mesh device according to any one of claims 1 to 12, characterized in that: The first oil mesh (10) has a first air inlet area (101) and a second air inlet area (102) arranged sequentially along the first direction and each having a first air inlet hole (100). There are two second oil meshes (20), arranged sequentially along the first direction. One second oil mesh (20) is opposite to the first air inlet area (101) of the first oil mesh (10), and the other second oil mesh (20) is opposite to the second air inlet area (102) of the first oil mesh (10). The two second oil meshes (20) are driven by the same driving mechanism and can move relative to the first oil mesh (10), thereby changing the air inlet state of the air inlet area on the side where the second oil mesh (20) is located.

14. A range hood, comprising a housing, an air inlet on the housing, and an oil filter at the air inlet, characterized in that: The oil mesh is the oil mesh device according to any one of claims 1 to 13.

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