Oil screen device and range hood

Abstract

The oil screen device comprises a first oil screen and a second oil screen which are sequentially arranged in the airflow direction of an air inlet, first air inlet holes are formed in the first oil screen, second air inlet holes are formed in the second oil screen, and the second oil screen is driven by a driving mechanism to linearly move relative to the first oil screen in the first direction. Therefore, the relative positions of the second air inlet holes in the second oil net and the first air inlet holes in the first oil net are changed; the device further comprises a first elastic piece and a second elastic piece, the first elastic piece acts on the second oil screen and enables the second oil screen to have the trend of moving in the second direction all the time, the second elastic piece acts on the second oil screen and enables the second oil screen to have the trend of moving in the first direction all the time, and the first direction is opposite to the second direction. The first oil screen and the second oil screen are parallel in the extending direction. The device has the advantages that the relative movement process of the oil screen is stable and reliable, and the problem of jamming is not easy to occur.

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 component in the above-mentioned patent application still has some shortcomings. The spring assembly for resetting in the above-mentioned patent application is only arranged at one end of the two second oil screens that are far apart from each other. This single elastic element arrangement method is prone to causing the second oil screen to get stuck during the resetting movement, resulting in unstable movement and relatively low reliability.

[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 mesh device that provides a smooth and reliable oil mesh movement process and is less prone to jamming, 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: 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 in 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.

[0010] It also includes a first elastic element and a second elastic element. The first elastic element acts on the second oil mesh and causes the second oil mesh to always have a tendency to move along a second direction. The second elastic element acts on the second oil mesh and causes the second oil mesh to always have a tendency to move along a first direction. The first direction is opposite to the second direction and is parallel to the direction of movement of the second oil mesh.

[0011] In order to make a reasonable selection of the initial position of the second oil mesh, the elastic coefficient of the first elastic element is greater than that of the second elastic element.

[0012] In order to achieve smooth movement of the second oil mesh relative to the first oil mesh, the back of the first oil mesh is provided with a first positioning seat and a first guide rod. 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 out of the first slide rail as a first connecting end connected to the second oil mesh. The first elastic member abuts against the first guide rod.

[0013] The back of the first oil mesh is also provided with a second positioning seat and a second guide rod. The second positioning seat has a second slide rail extending along the moving direction of the second oil mesh. The second guide rod is axially slidably limited in the second slide rail, and one end protrudes out of the second slide rail as a second connecting end connected to the second oil mesh. The second elastic member abuts against the second guide rod.

[0014] The first elastic element and the second elastic element mentioned above can adopt various existing technologies, including various elastic elements such as compression springs, torsion springs, and leaf springs. However, in order to better cooperate with the first guide rod and the second guide rod, the first guide rod has a first limiting stop portion that protrudes radially outward. The first elastic element is a first spring, which is disposed in the first slide and abuts against the first limiting stop portion of the first guide rod.

[0015] The second guide rod has a second limiting stop that protrudes radially outward, and the second elastic element is a second spring, which is disposed in the second slide and abuts against the second limiting stop of the second guide rod.

[0016] In order to connect the second oil mesh with the first guide rod and the second guide rod mentioned above, the second oil mesh has a first arm and a second arm that are spaced apart along the moving direction of the second oil mesh and extend outward from the side. The first arm is connected to the first connecting end of the first guide rod, and the second arm is connected to the second connecting end of the second guide rod.

[0017] As an improvement, 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, and the first support arm and the second support arm are provided at both the first side and the second side.

[0018] To facilitate the assembly and disassembly of the second oil filter and the guide rod, the first connecting end of the first support arm and the first guide rod are detachably connected, and the second connecting end of the second support arm and the second guide rod are detachably connected.

[0019] In order to be adapted and installed with the corresponding guide rod connection end, the end of the first support arm is formed with a first rolled flange, and a first bushing is provided in the first rolled flange for the first connection end of the first guide rod to pass through. The end of the second support arm is formed with a second rolled flange, and a second bushing is provided in the second rolled flange for the second connection end of the second guide rod to pass through.

[0020] To simplify the installation structure of the bushing and the rolled flange, the first bushing includes a first bushing body and at least two first elastic arms that are arranged sequentially at intervals along the circumference of the first bushing body and extend axially. Each first elastic arm has a first protrusion that protrudes radially outward at a section away from the first bushing body. The end of the first bushing body has a first limiting edge that protrudes radially outward. The end of the first rolled flange is also provided with a first limiting recess. When the first bushing is installed in the first rolled flange, the first limiting edge abuts against the end of the first rolled flange, and the first protrusion of each first elastic arm is engaged in the first limiting recess.

[0021] The second bushing includes a second bushing body and at least two second spring arms arranged sequentially at intervals along the circumference of the second bushing body and extending axially. Each second spring arm has a second protrusion that protrudes radially outward at a section away from the second bushing body. The end of the second bushing body has a second limiting stop that protrudes radially outward. The end of the second rolled flange is also provided with a second limiting recess. When the second bushing is installed in the second rolled flange, the second limiting stop abuts against the end of the second rolled flange, and the second protrusion of each second spring arm is engaged in the second limiting recess.

[0022] To facilitate the installation of the second oil mesh, the first connecting end of the first guide rod and the second connecting end of the second guide rod are respectively located on two adjacent ends of the two.

[0023] In order to adjust the air intake volume on the left and right sides of the air inlet to adapt to different cooking conditions on the left and right sides, the first oil mesh has a first air intake area and a second air intake area arranged sequentially along the first direction and both having first air intake holes. There are two second oil meshes arranged sequentially along the first direction. One second oil mesh is opposite to the first air intake area of ​​the first oil mesh, and the other second oil mesh is opposite to the second air intake area of ​​the first oil mesh. The two 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.

[0024] Generally, the two air inlet zones on the first oil mesh can be two areas on an integrated oil mesh, or they can be air inlet zones corresponding to two independent sub-oil meshes. Preferably, the first oil mesh includes two sub-oil meshes arranged sequentially along a first direction, and the two sub-oil meshes correspond to the first air inlet zone and the second air inlet zone of the first oil mesh, respectively.

[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 existing technologies, the advantages of this invention are as follows: The oil mesh device uses a first elastic element and a second elastic element with opposite directions of reset elasticity to act on the second oil mesh. Thus, during the movement of the second oil mesh, neither the first nor the second elastic element deforms, ensuring that the second oil mesh can move and reset smoothly and accurately, avoiding jamming and guaranteeing the reliability of the mechanism. In particular, by changing the elastic coefficients of the two elastic elements, the initial position of the second oil mesh can also be adjusted, improving the flexibility of oil mesh airflow regulation. Attached Figure Description

[0027] Figure 1This 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 in Embodiment 1 of this utility model. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0035] 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.

[0036] 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.

[0037] Figure 1 and Figure 2 The 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.

[0038] 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).

[0039] 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 folded towards the side where the second oil mesh 20 is located. The length extension direction of the two first folded edges 12 is perpendicular to the first direction. The first oil mesh 10 also has two opposite sides in a direction perpendicular to the first direction. Each of these two sides of the first oil mesh 10 has a second folded edge 13 folded towards the side where the second oil mesh 20 is located. The length extension direction of the two second folded edges 13 is parallel to the first direction.

[0040] 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.

[0041] 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.

[0042] 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 return 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 return 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 return 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 movement direction of the second oil mesh 20.

[0043] 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 4130. 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 and the second limiting sleeve 43 of the second guide rod 42. 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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 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.

[0048] 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.

[0049] The installation process of the combined structure of the oil mesh device in this embodiment is as follows:

[0050] 1. Install the corresponding bushings in the four rolled edges of the second oil mesh 20.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 5. The entire oil mesh device assembly structure is now installed.

[0055] The disassembly process of the combined structure of the oil mesh device in this embodiment is as follows:

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

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 elastic element (34) and a second elastic element (44). The first elastic element (34) acts on the second oil mesh (20) and makes the second oil mesh (20) always have a tendency to move along the second direction. The second elastic element (44) acts on the second oil mesh (20) and makes the second oil mesh (20) always have a tendency to move along the first direction. The first direction is opposite to the second direction and is parallel to the direction of movement of the second oil mesh (20).

2. The oil mesh device according to claim 1, characterized in that: The elastic coefficient of the first elastic element (34) is greater than that of the second elastic element (44).

3. The oil mesh device according to claim 1, characterized in that: The back of the first oil mesh (10) is provided with a first positioning seat (31) and a first guide rod (32). 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 connecting end (321) connected to the second oil mesh (20). The first elastic member (34) abuts against the first guide rod (32). The back of the first oil mesh (10) is also provided with 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 elastic member (44) abuts against the second guide rod (42).

4. The oil mesh device according to claim 3, characterized in that: The first guide rod (32) has a first limiting stop (320) that protrudes radially outward, and the first elastic element (34) is a first spring. The first spring is disposed in the first slide (310) and abuts against the first limiting stop (320) of the first guide rod (32). The second guide rod (42) has a second limiting stop (420) that protrudes radially outward, and the second elastic member (44) is a second spring. The second spring is disposed in the second slide (410) and abuts against the second limiting stop (420) of the second guide rod (42).

5. The oil mesh device according to claim 3, characterized in that: The second oil mesh (20) has 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. The first arm (21) is connected to the first connecting end (321) of the first guide rod (32), and the second arm (22) is connected to the second connecting end (421) of the second guide rod (42).

6. The oil mesh device according to claim 5, 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 direction of movement of the second oil mesh (20). The first support arm (21) and the second support arm (22) are provided at the first side and the second side.

7. The oil mesh device according to claim 5, characterized in that: The first support arm (21) and the first connecting end (321) of the first guide rod (32) are detachably connected, and the second support arm (22) and the second connecting end (421) of the second guide rod (42) are detachably connected.

8. The oil mesh device according to claim 7, characterized in that: The end of the first support arm (21) is formed with a first rolled flange (211), and a first bushing (23) is provided in the first rolled flange (211) for the first connecting end (321) of the first guide rod (32) to pass through. The end of the second support arm (22) is formed with a second rolled flange (221), and a second bushing (24) is provided in the second rolled flange (221) for the second connecting end (421) of the second guide rod (42) to pass through.

9. The oil mesh device according to claim 8, characterized in that: The first bushing (23) includes a first bushing body (231) and at least two first spring arms (232) arranged sequentially at intervals along the circumference of the first bushing body (231) and extending axially. Each first spring arm (232) 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 stop edge (233) that protrudes radially outward. The end of the first rolled flange (211) is also provided with a first limiting recess (2110). When the first bushing (23) is installed in the first rolled flange (211), the first limiting stop edge (233) abuts against the end of the first rolled flange (211), and the first protrusion (2320) of each first spring arm (232) is inserted into the first limiting recess (2110). 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. Each second spring arm (242) 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 stop (243) that protrudes radially outward. The end of the second rolled flange (221) is also provided with a second limiting recess (2210). When the second bushing (24) is 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 protrusion (2420) of each second spring arm (242) is inserted into the second limiting recess (2210).

10. The oil mesh device according to claim 3, characterized in that: The first connecting end (321) of the first guide rod (32) and the second connecting end (421) of the second guide rod (42) are located on two adjacent ends of each other.

11. The oil mesh device according to any one of claims 1 to 10, 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.

12. The oil mesh device according to claim 11, characterized in that: The first oil mesh (10) includes two sub-oil meshes (11) arranged sequentially along a first direction. The two sub-oil meshes (11) correspond to the first air intake area (101) and the second air intake area (102) of the first oil mesh (10), respectively.

13. 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 12.

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