Oil screen device and range hood

Abstract

The invention relates to an oil screen device and a range hood, the oil screen device is arranged at an air inlet of the range hood and comprises a first oil screen and a second oil screen which are sequentially arranged in the airflow direction of the air inlet, and the elastic reset assembly comprises a fixed seat, a first oil screen and a second oil screen, the elastic supporting component is arranged on the fixed seat and comprises two elastic supporting arms which are arranged at an included angle; the elastic retaining component is arranged on the fixed seat in a manner of being capable of linearly moving relative to the fixed seat, and comprises a connecting part used for being connected with the first oil screen and two limiting support arms, the two limiting support arms are oppositely arranged, and the distance between the two limiting support arms is gradually reduced in the first direction; the two elastic supporting arms of the elastic supporting component abut against the inner sides of the two limiting supporting arms of the elastic maintaining component respectively and can move in the length direction of the limiting supporting arms in a sliding fit or rolling fit mode. The oil screen device has the advantages of being convenient and fast to disassemble and assemble and easy to clean.

Description

Technical Field

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

[0002] A range hood is a kitchen appliance for purifying the kitchen environment. Range hoods generally include top-suction range hoods and side-suction range hoods. The side-suction range hood uses the principle of eddy current wind pressure to absorb most of the oil fumes close to the cooking range in an arc shape, which can reduce the adverse effects on human health. Moreover, since the power source is close to the cooking range, the suction effect of the power source is basically not reduced. The oil mesh device is an important component of the range hood and is used for filtering oil stains. The traditional oil meshes of range hoods are mostly fixed integrated meshes. When the user cooks on one side, the effective suction of the oil fumes cannot be achieved by effectively using the air volume of the range hood, resulting in the problem that the oil fumes are likely to escape during one-sided cooking at a low gear of the range hood, while the noise is too loud at a high gear of the range hood, and efficient and quiet suction cannot be achieved.

[0003] In order to reasonably distribute the air intake volume of the air intake area of ​​the range hood and effectively utilize the air volume of the range hood to effectively extract oil smoke, a Chinese utility model patent application with application number CN202120687387.8 (authorization announcement number: CN215570676U) discloses an air intake component and a range hood using the air intake component, the air intake component includes a panel, and a first oil net is arranged at the air inlet of the panel, the first oil net has two, one end of each of the two first oil nets is close to each other, and the other end of each of the two first oil nets is far away from each other, the air intake component also includes a second oil net, each first oil net corresponds to a second oil net, the second oil net can move in a direction away from or close to another second oil net, and each second oil net can be in a first position and a second position respectively. In the first position, the second oil net cooperates with the first oil net and is in an air intake state that makes the air inlet fully open as a whole. In the second position, the second oil net cooperates with the first oil net and is in a state of partially opening the air inlet as a whole. The adjustment of the oil net position is also reset by the compression spring assembly. The body of each compression spring assembly is fixed on the side of the first oil net facing the inner side of the shell, and the pressure head of each compression spring assembly is respectively in contact with the ends of the two second oil nets that are far away from each other. When the transmission rod drives the cam to rotate in a certain direction, the second oil net at the corresponding position slides toward the corresponding elastic member, so that the elastic member is compressed. When the transmission rod rotates in the opposite direction, the force of the cam on the block on the second oil net disappears, and the second oil net slides to the middle and resets under the action of the restoring force of the elastic member. A limit guide rail is set on the flange of the first oil net, and the upper and lower ends of the second oil net are respectively formed with inserts that slide with the limit guide rail, which play a role of sliding guidance and limiting the second oil net. A limit guide groove extending left and right is formed on the limit guide rail, and the limit guide groove passes through one end of the limit guide rail of the corresponding first oil net away from the other first oil net, and the end that passes through constitutes the entrance of the limit guide groove.

[0004] However, the air inlet assembly in the above patent application still has certain shortcomings. First, a horizontal driving mechanism is usually set in the central area of ​​the left and right oil screens to push the inner oil screen to move horizontally. In order to save installation space, the horizontal driving mechanism usually adopts a rotating cam or a lever structure to act on the inner side, and the elastic member used to reset the second oil screen usually adopts a compression spring assembly. Figure 1From the perspective of force analysis, during the circular motion of the lever, the force F exerted by the lever on the inner oil screen can be decomposed into a horizontal force F1 and a vertical force F2. The horizontal force F1 drives the inner oil screen to move linearly, while the vertical force F2 causes the inner oil screen to shift during movement, increasing the possibility of contact between the inner and outer oil screens and resulting in movement jamming. For a conventional compression spring reset structure, since there is no structure to suppress or counteract the vertical force F2, this vertical shift cannot be avoided. To solve this problem, it is necessary to additionally set corresponding linear guides for guiding the lateral movement of the inner and outer oil screens. However, the setting of the guide rail assembly makes the assembly and disassembly process of the inner and outer oil screens complex. In particular, there are cleaning dead corners at the installation position of the upper guide rail assembly of the oil screen, making it difficult to clean. Secondly, the elastic member for resetting and the inner and outer oil screens are both in the air inlet and the oil path, and are easily contaminated with oil stains. For a conventional compression spring reset structure, it is easy to accumulate oil stains in the spring, resulting in incomplete or ineffective reset. For example, if the user uses the left oil screen to suck and exhaust oil fumes, while closing the right oil screen (the spring on the right is in the extended state), and sets this state for a long time, such as within a one-month cooking cycle, whether the machine is turned on or off, the inner and outer oil screens on both sides are in this state. When the user cooks in this state, the spring is easily contaminated and accumulates oil stains. When the user wants to use the right side to suck and exhaust oil fumes (spring reset), when closing the left side, it is possible that the spring on the right cannot be fully reset due to the obstruction of oil stains, the air inlet on the right cannot be fully opened, and the structure fails, causing trouble to the user's cooking experience. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide an oil screen device that is convenient and quick to disassemble and assemble and easy to clean in view of the current situation of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide an oil screen device that can effectively avoid the failure of the oil screen reset caused by oil stain accumulation in view of the current situation of the prior art.

[0007] The third technical problem to be solved by the present invention is to provide a range hood applying the above oil screen device in view of the current situation of the prior art.

[0008] The technical solutions adopted by the present invention to solve the first and second technical problems are as follows: An oil screen device is arranged at the air inlet of a range hood, and includes a first oil screen and a second oil screen arranged in sequence along the air flow direction at the air inlet. The first oil screen is provided with first air inlet holes, and the second oil screen is provided with second air inlet holes. The second oil screen is driven by a driving mechanism to move linearly relative to the first oil screen in a first direction, so as to change the relative position between the second air inlet holes on the second oil screen and the first air inlet holes on the first oil screen;

[0009] It further includes an elastic reset component that can act on the second oil screen to enable the second oil screen to linearly move relative to the first oil screen along a second direction. The second direction and the first direction are two opposite directions. The elastic reset component includes:

[0010] A fixed seat, fixed relative to the second oil screen;

[0011] An elastic support member, provided on the fixed seat, which includes two elastic support arms arranged at an angle;

[0012] An elastic holding member, provided on the fixed seat in a manner that can linearly move relative to the fixed seat, which includes a connecting portion for connecting with the first oil screen and two limiting support arms. The two limiting support arms are arranged oppositely, and the distance between the two gradually decreases along the first direction;

[0013] The two elastic support arms of the elastic support member respectively abut against the inner sides of the two limiting support arms of the elastic holding member, and can move along the length direction of the limiting support arms in a manner of sliding fit or rolling fit.

[0014] During the process of the second oil screen moving relative to the first oil screen along the first direction, the two elastic support arms of the elastic support member slide relative to the two limiting support arms of the elastic holding member and are squeezed by the two limiting support arms to accumulate elastic potential energy; after the driving mechanism releases the force applied to the second oil screen, the two elastic support arms of the elastic support member release the elastic potential and slide in the opposite direction relative to the two limiting support arms of the elastic holding member, thereby driving the second oil screen to move relative to the first oil screen along the second direction. The second direction and the first direction are two opposite directions.

[0015] The oil screen device of the present invention realizes the reset of the second oil screen by using an elastic reset component, which includes an elastic support member and an elastic holding member. Among them, the two elastic support arms of the elastic support member respectively abut against the inner sides of the two limiting support arms of the elastic holding member, and can move along the length direction of the limiting support arms in a manner of sliding fit or rolling fit. During the process of the two elastic support arms of the elastic support member moving along the length direction of the limiting support arms and being gradually compressed, the component force generated by the driving mechanism (such as using a lever or a cam to drive) acting on the second oil screen and inconsistent with the first direction can be effectively inhibited or offset by the two limiting support arms of the elastic holding member, thereby reducing or eliminating the offset influence caused by the component force. On the other hand, by using an elastic holding member with two elastic support arms and cooperating with the elastic holding member in a sliding or rolling manner to realize elastic reset, it is not easy to have the problem of the oil screen reset failure caused by oil stain accumulation, and the service life of the elastic reset component is prolonged.

[0016] Considering that the direct sliding contact fit may cause jamming problems, resulting in hysteresis in the reset of the elastic support member, roller sleeves, ball bearings or rollers that can respectively roll on the inner sides of the two limiting arms of the elastic holding member are provided at the ends of the two elastic arms. With the above rolling fit structure design, the frictional resistance can be effectively reduced, ensuring that the elastic potential energy of the elastic holding member can be effectively converted.

[0017] In order to achieve stable and reliable installation of the roller sleeve, the ends of the two elastic arms have bent hooks, and a freely rotatable roller sleeve is provided on the bent hooks.

[0018] In order to ensure that the two limiting arms of the elastic holding member can provide good guiding effects, the two limiting arms of the elastic holding member are both plate-shaped, and the roller sleeves on the two elastic arms are respectively in rolling fit with the opposite inner side surfaces of the two limiting arms. The plate-shaped limiting arms can provide a stable guiding plane, ensuring stable movement of the ends of the elastic arms of the elastic support member.

[0019] Generally speaking, the elastic support member can refer to a mechanical element with elastic deformation ability, such as a torsion spring, a disc spring, a spring steel sheet, etc. Considering cost reduction, the elastic support member is a torsion spring with two arms, and a positioning shaft for the main body of the torsion spring to rotate and sleeve thereon is provided on the fixed seat. The two arms of the torsion spring are the two elastic arms mentioned above. Standardized torsion springs can effectively reduce the manufacturing cost.

[0020] In order to ensure the cooperation between the elastic arms of the elastic support member and the elastic holding member and avoid interference problems, there is a gap between the ends of the two limiting arms, and the ends of the two elastic arms pass through this gap and extend into the interior of the elastic holding member. It can be imagined that the ends of the two limiting arms of the elastic holding member can also be directly connected and fixed (that is, no gap is provided), and the elastic arms of the elastic holding member adopt a bent design structure to solve the interference problem.

[0021] In order to ensure the structural strength and facilitate the quick-release connection between the elastic holding member and the first oil screen, the elastic holding member further includes a connecting plate for connecting with the second oil screen. The ends of the two limiting arms are connected to the connecting plate, and a clamping buckle for detachably connecting with the first oil screen is provided on the connecting plate as the connecting part.

[0022] In order to ensure the reliability of the connection between the elastic retaining member and the first oil net, especially to avoid the problem of the elastic retaining member swinging or shaking left and right, the side of the first oil net has a first flange folded toward the back, and the extension direction of the first flange is perpendicular to the moving direction of the second oil net. The fixing seat is arranged on the back of the side of the second oil net opposite to the first flange, and when the connecting plate is clamped on the first flange by the clamping buckle, the connecting plate and the first flange are in contact with each other. The structural design of the surface contact between the connecting plate and the first flange can effectively avoid the problem of the elastic retaining member swinging or shaking left and right.

[0023] In order to avoid lateral slippage of the elastic retaining component and further ensure the reliability of the connection between the elastic retaining component and the first oil net, the first flange is provided with a limiting boss protruding toward the middle area of ​​the first oil net, and the connecting plate is defined with a first limiting groove for the limiting boss to be inserted into.

[0024] In order to play a good protective role and reduce the contamination of internal components by oil, the fixing seat is a shell, the elastic supporting member and the elastic retaining member are both arranged in the shell, and the side of the shell is provided with a clearance opening for the elastic retaining member to enter and exit.

[0025] In order to further ensure the stability of the relative movement process of the first oil net and the second oil net, the two side portions of the first oil net parallel to the moving direction of the second oil net both have second flanges folded toward the back side, and the end edges of the two second flanges both have limit ribs bent toward the middle area of ​​the first oil net, and a limit groove is defined between each limit rib and the corresponding second flange and the main body of the first oil net, and the two side portions of the second oil net parallel to its moving direction are correspondingly limited in the above-mentioned two limit grooves.

[0026] In order to facilitate the installation of the second oil net on the back side of the first oil net, at least one side of the second oil net opposite to the limiting rib has an installation notch recessed toward the middle area of ​​the second oil net for the corresponding limiting rib to pass through.

[0027] In order to reduce the friction contact area and ensure the flexibility of the movement of the second oil net, the two side portions of the second oil net parallel to the moving direction of the second oil net have a third flange folded toward the back side, and the third flange of the second oil net and one of the second flanges of the first oil net have a supporting protrusion protruding toward the other flange.

[0028] 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, a first air inlet area and a second air inlet area are arranged in sequence along the moving direction of the second oil net on the first oil net, and the first air inlet holes are evenly distributed in both areas. There are two second oil nets, which are also arranged in sequence along the moving direction of the second oil net. One of the second oil nets is opposite to the first air inlet area of the first oil net, and the other second oil net is opposite to the second air inlet area of the first oil net. The elastic reset components on the two second oil nets are correspondingly arranged on two side parts of the two second oil nets that are close to or away from each other.

[0029] Generally, the two air inlet areas on the first oil net can be two areas on an integrated oil net, or can be the air inlet areas corresponding to two independent sub-oil nets. Preferably, the first oil net includes two sub-oil nets arranged in sequence along the moving direction of the second oil net, and the two sub-oil nets respectively correspond to the first air inlet area and the second air inlet area of the first oil net.

[0030] In order to further reduce the frictional contact area between the back surface of the first oil net and the front surface of the second oil net and prevent them from separating, a plurality of support members for spacing the front side surface of the second oil net from the back surface of the first oil net are also provided on the first oil net or the second oil net. The first oil net and the second oil net are also adsorbed together by magnetic members.

[0031] The technical solution adopted by the present invention to solve the third technical problem is as follows: An oil fume exhaust machine includes a housing, an air inlet is provided on the housing, and an oil net is provided at the air inlet, and the oil net adopts the above-mentioned oil net device.

[0032] Compared with the prior art, the advantages of the present invention are as follows: The oil net device of the present invention uses an elastic reset component to realize the reset of the second oil net, which includes an elastic support member and an elastic holding member. Among them, the two elastic arms of the elastic support member respectively abut against the inner sides of the two limit arms of the elastic holding member, and can move along the length direction of the limit arm by means of sliding fit or rolling fit. During the process that the two elastic arms of the elastic support member move along the length direction of the limit arm and are gradually compressed, the component force acting on the second oil net by the driving mechanism (such as using a lever or a cam to drive) that is inconsistent with the first direction can be effectively inhibited or offset by the two limit arms of the elastic holding member, thereby reducing or eliminating the offset influence caused by the component force. On the other hand, an elastic holding member with two elastic arms is adopted, and elastic reset is realized by means of sliding or rolling cooperation with the elastic holding member, and it is not easy to have the problem that the oil net reset fails due to oil stain accumulation, and the service life of the elastic reset component is prolonged. Description of the Drawings

[0033] Figure 1Schematic diagram of the force analysis during the movement of the inner oil screen (second oil screen) of the oil screen device;

[0034] Figure 2 Schematic perspective view of the oil screen device according to an embodiment of the present invention;

[0035] Figure 3 Another perspective schematic perspective view of the oil screen device according to an embodiment of the present invention;

[0036] Figure 4 Exploded view of the oil screen device according to an embodiment of the present invention;

[0037] Figure 5 Schematic perspective view of the elastic reset device according to an embodiment of the present invention;

[0038] Figure 6 Exploded view of the elastic reset device according to an embodiment of the present invention;

[0039] Figure 7 Schematic perspective view of the oil screen device according to an embodiment of the present invention (the torsion spring is in a compressed state);

[0040] Figure 8 Schematic perspective view of the oil screen device according to an embodiment of the present invention after removing the first oil screen (the housing body of the fixed seat is in a separated state);

[0041] Figure 9 Schematic perspective view of the oil screen device according to an embodiment of the present invention (the second oil screen is in a state during the installation process and is not in contact with the back surface of the first oil screen);

[0042] Figure 10 Schematic perspective view of the elastic reset device according to an embodiment of the present invention after removing the cover body;

[0043] Figure 11 Perspective sectional view of the oil screen device according to an embodiment of the present invention taken along its width direction. Detailed implementation manners

[0044] The present invention will be further described in detail below in conjunction with the embodiments with reference to the accompanying drawings.

[0045] In the description and claims of the present invention, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention. However, these terms are used only for the purpose of convenience in description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0046] Figures 1-11 A preferred embodiment of the oil screen device of the present invention and a range hood using the oil screen device is shown. The range hood includes a housing and a centrifugal fan disposed inside the housing. The housing generally includes a fan frame and a smoke collecting hood disposed at the bottom of the fan frame. The inner cavity of the fan frame is communicated with the inner cavity of the smoke collecting hood. An air inlet is formed on the front side wall of the smoke collecting hood, and external smoke can enter the smoke collecting hood through the air inlet. The centrifugal fan is disposed inside the fan frame. When the centrifugal fan operates, a negative pressure is generated, and external cooking fumes can be sucked into the smoke collecting hood through the air inlet. An oil screen device is further disposed at the air inlet of the smoke collecting hood for filtering cooking fumes.

[0047] The three-dimensional structural schematic diagrams of the front and back angles of the oil screen device of this embodiment are respectively as Figure 2 and Figure 3 shown. The oil screen device includes a first oil screen 21 and a second oil screen 31 disposed on the back of the first oil screen 21, and the two are arranged in sequence along the air flow direction at the air inlet. First air inlet holes 210 are arranged on the first oil screen 21, and second air inlet holes 310 are arranged on the second oil screen 31. The air inlet holes of both are strip-shaped holes with the same extending direction.

[0048] See Figure 2 , the first oil screen 21 has two air inlet areas arranged in sequence, namely a first air inlet area 211 and a second air inlet area 212, and first air inlet holes 210 are distributed on both air inlet areas. There are two second oil screens 31, which are arranged along the first direction A1. One corresponds to the first air inlet area 211 of the first oil screen 21, and the other corresponds to the second air inlet area 212. Specifically, the first oil screen 21 includes two sub-oil screens 21a, and these two sub-oil screens 21a respectively form the first air inlet area 211 and the second air inlet area 212. The second oil screen 31 can move linearly relative to the first oil screen 21 along the first direction A1 through a driving mechanism, so that the overlapping area of the second air inlet holes 310 and the first air inlet holes 210 changes, thereby realizing the adjustment of the air inlet volume.

[0049] Each sub-oil screen 21a of the first oil screen 21 is combined with the corresponding second oil screen 31 to form an oil screen unit. In this embodiment, two symmetrically arranged oil screen units are adopted and spliced to form an integral device. The second oil screens 31 of the two oil screen units can move independently to adapt to different cooking conditions on the left and right sides of the range hood. The driving mechanism is usually arranged in the joint area of the two oil screen units, and the motion control can be realized by using the existing technology of a driving motor and a lever or a cam drive.

[0050] See Figure 7 , taking a single oil screen unit as an example, both the first oil screen 21 and the second oil screen 31 are square structures, and the size of the second oil screen 31 is slightly smaller than that of the first oil screen 21. Among them, the sub-oil screen 21a of the first oil screen 21 is provided with first flanges 221 that are folded towards the second oil screen 31 on both sides in the first direction A1, and the extending direction thereof is perpendicular to the first direction A1; while on both sides perpendicular to the first direction A1, second flanges 222 are provided, and the extending direction thereof is parallel to the first direction A1. The end edges of the two second flanges 222 both have limiting edges 223 that are bent towards the middle area of the first oil screen 21. Each limiting edge 223 defines a limiting groove 220 between the corresponding second flange 222 and the main body of the first oil screen 21, and the two side parts of the second oil screen 31 parallel to its moving direction are correspondingly limited in the above two limiting grooves 220. This structural design helps to enhance the support and diversion functions of the oil screen, and at the same time ensures the stable movement of the second oil screen 31 on the back. The outer peripheral edge of the second oil screen 31 also has a third flange 33 that is folded towards the back. The inner side of the second flange 222 of the first oil screen 21 (that is, the side facing the third flange 33 of the second oil screen 31) has support protrusions 24 that protrude towards the second oil screen 31. The support protrusions 24 are arranged in sequence along the length direction of the second flange 222, and the surface structure is an arc-shaped curved surface structure. The outer side surface of the third flange 33 of the second oil screen 31 contacts the support protrusions 24 on the second flange 222 of the first oil screen 21, reducing the frictional contact area between the two oil screen flanges and ensuring the flexibility of the movement of the second oil screen 31.

[0051] See Figure 9 , in order to facilitate the installation of the second oil screen 31 on the back of the first oil screen 21, at least one side part of the second oil screen 31 opposite to the limiting edge 223 has an installation notch 32 that is recessed towards the middle area of the second oil screen 31 for the corresponding limiting edge to pass through.

[0052] One of the two side parts of the second oil screen 31 in the moving direction of the second oil screen can cooperate with the driving mechanism, and the other side part is provided with an elastic reset assembly 4. The elastic reset assembly 4 includes a fixed seat 41, an elastic support member 42, and an elastic holding member 43.

[0053] The fixing base 41 can be fixed to the back surface of the second oil screen 31 by screws. The fixing base 41 is a cubic-shaped housing, which includes a housing body 411 with an opening and a cover body 412. The cover body 412 is connected to the opening of the housing body 411 through a snap structure. The above-mentioned torsion spring and the elastic holding member 43 are both arranged inside the housing. A relief opening 410 is formed on the wall surface of one side of the housing facing the first flanging 221 of the first oil screen 21, and the elastic holding member 43 can enter and exit the housing through the relief opening 410. The elastic support member 42 adopts a standardized double-arm torsion spring, the main body of which is sleeved on the positioning shaft 413 on the fixing base 41. The two arms are arranged at a V-shaped angle, and a bent hook 4210 is provided at the end. A freely rotatable roller sleeve 422 is installed on the bent hook 4210. The extending direction of the positioning shaft 413 on the fixing base 41 is substantially perpendicular to the plane where the second oil screen 31 or the first oil screen 21 is located, that is, the plane formed by the swinging path of the torsion spring is substantially parallel to the first oil screen 21 or the second oil screen 31. The setting of the roller sleeve 422 on the arm of the torsion spring is used to keep the balance on both sides of the torsion spring and reduce the friction between the torsion spring and the limiting arm 431 of the elastic holding member 43 during the movement of the second oil screen 31. The elastic holding member 43 includes a connecting plate 432 and two limiting arms 431. The limiting arms 431 are plate-shaped structures, and the distance between them gradually decreases along the first direction A1. The two ends of the connecting plate 432 are connected to the ends of the two limiting arms 431. The extending direction of the connecting plate 432 is parallel to the first flanging 221 of the first oil screen 21. A clamping buckle 433 is provided in the middle area of the length direction of the connecting plate 432 for detachably connecting with the first flanging 221 of the first oil screen 21. The connecting plate 432 is in abutment with the first flanging 221. A limiting boss 23 protruding (protruding towards the middle area of the first oil screen 21) is provided in the middle of the first flanging 221, and a first limiting groove 434 is correspondingly formed on the connecting plate 432. A clamping groove is correspondingly formed at the position of the limiting boss 23 on the first flanging 221, which can be formed by stamping. The clamping buckle 433 of the connecting plate 432 is correspondingly clamped at the position of the limiting boss 23 of the first flanging 221. When the clamping buckle 433 of the connecting plate 432 is in the clamped state on the first flanging 221, the clamping buckle 433 is correspondingly received in the clamping groove and will not protrude too much relative to the outer wall surface of the first flanging 221. At the same time, the limiting boss 23 of the first flanging 221 is inserted into the first limiting groove 434 of the connecting plate 432 to achieve the limit in the width direction of the oil screen (that is, the length direction of the first flanging 221).

[0054] To ensure the cooperation between the elastic arms 421 of the elastic support member 42 and the elastic retaining member 43 and avoid interference problems, there is a gap 4310 between the ends of the two limiting arms 431. The ends of the two elastic arms 421 pass through this gap 4310 and extend into the interior of the elastic retaining member 43. During installation, the inner sides of the two limiting arms 431 of the elastic retaining member 43 are in rolling contact with the roller sleeve 422 of the torsion spring. When the driving mechanism (such as a lever) pushes the second oil screen 31 to move in the first direction A1, the roller sleeve 422 rolls along the limiting arm 431, and the two arms of the torsion spring are compressed to accumulate elastic potential energy. At the same time, the limiting arm 431 inhibits the vertical component force to prevent the second oil screen 31 from shifting. After the driving mechanism releases the force applied to the second oil screen 31, the torsion spring releases its potential energy and drives the second oil screen 31 to reset.

[0055] Near the position where the main body of the torsion spring is located inside the fixed seat 41, there is also a first limiting block 414 for restricting the rotation of the torsion spring around the positioning shaft 413. The first limiting block 414 is composed of two split limiting blocks, which respectively abut against the roots of the two elastic arms 421 of the torsion spring. Of course, the first limiting block can also be an integral part, with a corresponding V-shaped notch defined thereon. The two sides of the V-shaped notch abut against the roots of the two elastic arms 421 of the torsion spring to restrict the rotation of the torsion spring. Inside the fixed seat 41, there is also a second limiting block 415. There can be two second limiting blocks arranged at intervals. In the state where the elastic retaining member 43 retracts into the fixed seat 41 (i.e., the storage state), the two sides of the ends of the two limiting arms 431 of the elastic retaining member 43 facing away from each other respectively abut against the two second limiting blocks, so that the elastic retaining member 43 remains in a relatively stable state.

[0056] The elastic reset assembly 4 cooperates with the rolling contact and the limiting arm 431 to effectively inhibit the vertical component force generated during the process of the driving mechanism driving the second oil screen 31 to move, and avoid the problem of the second oil screen 31 shifting and jamming. Standardized components such as torsion springs and spring steel sheets reduce costs, and structures such as roller sleeves 422 and ball bearings reduce frictional resistance. The cooperation between the clamping buckle 433 and the limiting boss 23 realizes the quick-release function, which is convenient for cleaning. The double-oil-screen partition design adapts to different cooking scenarios and improves the oil fume extraction efficiency. Those skilled in the art can adjust the material of the elastic support member 42, the inclination angle of the limiting arm 431 according to the above embodiments, in combination with specific processes, or adopt other driving methods (such as direct drive by a motor), all of which fall within the protection scope of the present invention.

[0057] See Figure 11 , on the second oil screen 31, there are also provided a plurality of support members 34 for spacing the front side of the second oil screen 31 from the back side of the first oil screen 21. The support members 34 can be integrally formed with the second oil screen 31 by hot melting. As Figure 3As shown, two upper and lower rows of support members 34 are placed between the second oil screen 31 and the first oil screen 21, with 4 support members 34 in each row. The first oil screen 21 and the second oil screen 31 are also adsorbed together by a magnetic member 35. Specifically, two of the support members 34 in a row (such as the upper row in Figure 3 ) adjacent to the side of the second oil screen 31 where its installation notch 32 is located are additionally provided with magnets for adsorbing the first oil screen 21. As Figure 3 shown, magnets are additionally provided at the positions of the upper left and upper right support members 34 of the second oil screen 31 to adsorb the upper end of the second oil screen 31. The lower end of the second oil screen 31 is limited by the limiting edge 223 of the first oil screen 21, solving the risk of falling off due to the absence of a magnet at the lower end.

[0058] Taking the right oil screen unit as an example, the operation process of installing the second oil screen 31 onto the first oil screen 21 is as follows: First, insert the lower end of the second oil screen 31 obliquely downward into the lower end of the first oil screen 21, and then make the rightmost side of the second oil screen 31 abut against the first flanging 221 of the first oil screen 21; flip the second oil screen 31 downward (the flipping direction is shown as the S direction in Figure 9 ), and the upper end of the second oil screen 31 is adsorbed to the first oil screen 21 through a magnet. The clamping buckle 433 of the elastic reset assembly 4 is buckled into the first flanging 221 of the first oil screen 21 during the flipping process of the second oil screen 31. At this time, the second oil screen 31 and the first oil screen 21 are fixedly installed. The operation method for disassembling the second oil screen 31 from the first oil screen 21 is opposite to the above: The user grabs the upper end of the second oil screen 31 and lifts it upward, so that the magnet at the upper end of the second oil screen 31 is separated from the first oil screen 21; during the upward flipping process of the second oil screen 31, the clamping buckle 433 of the reset assembly leaves the first flanging, so that the second oil screen 31 is separated from the first oil screen 21. Then take out the second oil screen 31 obliquely upward, and the disassembly is completed.

[0059] On the basis of the above embodiments, other embodiments can be obtained by replacing and improving relevant technical features. For example, the elastic support member 42 is not limited to a torsion spring. For example, elastic shrapnel with elastic reset ability can be used, such as two elastic support arms 421 made of steel sheets or spring steel sheets, with balls installed at the ends. A guide groove is provided inside the limit support arm 431 of the elastic holding member 43, and the balls are embedded in the groove and roll to reduce the frictional resistance. The driving mechanism adopts a cam structure. When the cam rotates, it pushes the second oil screen 31 to move. The spring steel sheet is deformed under pressure, and when the cam resets, the spring steel sheet drives the second oil screen 31 to move in the reverse direction. Again, the setting position of the support protrusion 24 can be interchanged between the second flange 222 of the first oil screen 21 and the third flange 33 of the second oil screen 31. That is, a support protrusion 24 is provided on the third flange 33 of the second oil screen 31 and is in sliding contact with the second flange 222 of the first oil screen 21 to reduce the friction area and improve the smoothness of movement. For another example, the support member 34 and the magnet can also be provided on the first oil screen 21, not limited to being provided on the second oil screen 31.

Claims

1. An oil net device, arranged at the air inlet of a range hood, comprising a first oil net (21) and a second oil net (31) arranged in sequence along the air flow direction at the air inlet, wherein the first oil net (21) is provided with a first air inlet hole (210), and the second oil net (31) is provided with a second air inlet hole (310), and the second oil net (31) is driven by a driving mechanism to move linearly along a first direction (A1) relative to the first oil net (21), thereby changing the relative position of the second air inlet hole (310) on the second oil net (31) and the first air inlet hole (210) on the first oil net (21); Features It also includes an elastic reset component (4) capable of acting on the second oil net (31) to make the second oil net (31) move linearly relative to the first oil net (21) along a second direction (A2), wherein the second direction (A2) and the first direction (A1) are opposite directions, and the elastic reset component includes: A fixing seat (41) fixed relative to the second oil net (31); An elastic support member (42) is disposed on the fixing seat (41), and comprises two elastic support arms (421) arranged at an angle; An elastic retaining member (43) is disposed on the fixing seat (41) in a manner capable of linear movement relative to the fixing seat (41), and comprises a connecting portion for connecting to the first oil net (21) and two limiting arms (431), wherein the two limiting arms (431) are arranged opposite to each other, and a distance between the two arms gradually decreases along a first direction (A1); The two elastic arms (421) of the elastic supporting member (42) respectively abut against the inner sides of the two limiting arms (431) of the elastic retaining member (43), and can move along the length direction of the limiting arms (431) by means of sliding fit or rolling fit.

2. The oil screen device according to claim 1, characterized in that: The ends of the two elastic support arms (421) are provided with roller sleeves (422), balls or rollers which can respectively roll in contact with the inner sides of the two limiting support arms (431) of the elastic retaining member (43).

3. The oil screen device according to claim 2, characterized in that: The ends of the two elastic supporting arms (421) are provided with bending hooks (4210), and the bending hooks (4210) are provided with freely rotatable roller sleeves (422).

4. The oil screen device according to claim 3, characterized in that: The two limiting support arms (431) of the elastic retaining component (43) are both plate-shaped, and the roller sleeves (422) on the two elastic support arms (421) are respectively rollingly fitted on the opposite inner side surfaces of the two limiting support arms (431).

5. The oil screen device according to claim 1, characterized in that: The elastic supporting member (42) is a torsion spring with two supporting arms. The fixing seat (41) is provided with a positioning shaft (413) on which the main body of the torsion spring is rotatably mounted. The two supporting arms of the torsion spring are the two elastic supporting arms (421).

6. The oil screen device according to claim 1, characterized in that: There is a gap (4310) between the ends of the two limiting arms (431), and the ends of the two elastic arms (421) pass through the gap (4310) and extend into the interior of the elastic retaining component (43).

7. The oil screen device according to claim 1, characterized in that: The elastic retaining member (43) further comprises a connecting plate (432) for connecting to the second oil net (31), the ends of the two limiting arms (431) being connected to the connecting plate (432), and the connecting plate (432) is provided with a clamping buckle (433) for detachably connecting to the first oil net (21) as the connecting portion.

8. The oil screen device according to claim 7, characterized in that: The side portion of the first oil net (21) has a first flange (221) folded toward the back, and the extension direction of the first flange (221) is perpendicular to the moving direction of the second oil net (31). The fixing seat (41) is arranged on the back side of the side portion of the second oil net (31) opposite to the first flange (221). When the connecting plate (432) is clamped on the first flange (221) by the clamping buckle (433), the connecting plate (432) and the first flange (221) are in contact with each other.

9. The oil net device according to claim 8, characterized in that: The first flange (221) is provided with a limiting boss (23) protruding toward the middle area of ​​the first oil net (21), and the connecting plate (432) defines a first limiting groove (434) for the limiting boss (23) to be inserted into.

10. The oil net device according to any one of claims 1 to 9, characterized in that: The fixing seat (41) is a shell, the elastic supporting member (42) and the elastic retaining member (43) are both arranged in the shell, and a side of the shell is provided with a clearance opening (410) for the elastic retaining member (43) to enter and exit.

11. The oil screen device according to any one of claims 1 to 9, characterized in that: The two side portions of the first oil net (21) parallel to the moving direction of the second oil net (31) both have second flanges (222) folded toward the back side, and the end edges of the two second flanges (222) both have limiting retaining edges (223) bent toward the middle area of ​​the first oil net (21), and a limiting groove (220) is defined between each limiting retaining edge (223) and the corresponding second flange (222) and the main body of the first oil net (21), and the two side portions of the second oil net (31) parallel to its moving direction are correspondingly limited in the above-mentioned two limiting grooves (220).

12. The oil screen device according to claim 11, characterized in that: At least one side portion of the second oil net (31) opposite to the limiting rib (223) has a mounting notch (32) recessed toward the middle region of the second oil net (31) for the corresponding limiting rib to pass through.

13. The oil screen device according to claim 11, characterized in that: Both side portions of the second oil net (31) parallel to the moving direction of the second oil net (31) have third flanges (33) folded toward the back side, and one of the third flange (33) of the second oil net (31) and the second flange (222) of the first oil net (21) has a supporting protrusion (24) protruding toward the other flange.

14. The oil screen device according to any one of claims 1 to 9, characterized in that: The first oil net (21) has a first air inlet area (211) and a second air inlet area (212) which are arranged in sequence along the moving direction of the second oil net and are evenly distributed with first air inlet holes (210); there are two second oil nets (31), which are also arranged in sequence along the moving direction of the second oil net, one of the second oil nets (31) is opposite to the first air inlet area (211) of the first oil net (21), and the other second oil net (31) is opposite to the second air inlet area (212) of the first oil net (21); the elastic reset components (4) on the two second oil nets (31) are correspondingly arranged on two side portions of the two second oil nets (31) which are close to or far away from each other.

15. The oil screen device according to claim 14, characterized in that: The first oil net (21) comprises two sub-oil nets (21a) arranged in sequence along the moving direction of the second oil net, and the two sub-oil nets (21a) respectively correspond to the first air inlet area (211) and the second air inlet area (212) of the first oil net (21).

16. The oil net device according to any one of claims 1 to 9, characterized in that: The first oil net (21) or the second oil net (31) is also provided with a plurality of supporting members (34) for separating the front side of the second oil net (31) from the back side of the first oil net (21); the first oil net (21) and the second oil net (31) are also adsorbed together by a magnetic member (35).

17. A range hood, comprising a housing, an air inlet is provided on the housing, an oil net is provided at the air inlet, and the features are: The oil net adopts the oil net device according to any one of claims 1 to 16.

Images