Oil net device for range hood and range hood

Abstract

The present application relates to a kind of oil screen device and range hood for range hood, oil screen device includes the guide locking module being arranged in the back of first oil screen, the guide locking module includes the first locating seat with first slide and the sliding member being slidably arranged in first slide, the sliding direction of sliding member relative to first locating seat is parallel with first direction, sliding member has the first connecting end for being connected with second oil screen, sliding member and first locating seat between being provided with press type elastic self-locking structure, the press type elastic self-locking structure is configured as: sliding member is pressed by external force and can be moved between the locking position and the unlocking position of first direction at a certain distance relative to first locating seat.The operator does not need to additionally exert the force acting on second oil screen laterally, so that second oil screen can be quickly separated from first oil screen, improve dismounting efficiency, facilitate user to clean each part of oil screen device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular to an oil screen device for range hood and range hood. BACKGROUND

[0002] The range hood is a kind of kitchen appliance for purifying kitchen environment. The oil screen of the traditional range hood is a fixed integrated screen. When the user cooks on one side, the air volume of the range hood cannot be effectively utilized for effective suction of oil fume, which leads to the fact that the range hood is prone to smoke when cooking on one side at a small gear, and the noise of the range hood is too large when cooking on one side at a large gear, so that the range hood cannot be efficiently and quietly sucked. A range hood is disclosed in Chinese Patent Application No. 202010058463.9.

[0003] In order to reasonably distribute the air inlet volume of the air inlet area of the range hood and effectively utilize the air volume of the range hood for effective suction of oil fume, Chinese Utility Model Patent Application No. CN202120687387.8 (authorized publication number: CN215570676U) discloses an air inlet assembly and a range hood applying the same. The air inlet assembly comprises a panel, and a first oil screen is arranged at the air inlet of the panel. The first oil screen has two first oil screens, one end of each of the two first oil screens is close to each other, and the other end of each of the two first oil screens is away from each other. The air inlet assembly further comprises a second oil screen, each first oil screen corresponds to a second oil screen, and the second oil screen can move away from or close to the other second oil screen. Each second oil screen can be in a first position and a second position. When in the first position, the second oil screen cooperates with the first oil screen to be in an air inlet state in which the air inlet is completely opened. When in the second position, the second oil screen cooperates with the first oil screen to be in a state in which the air inlet is partially opened. The adjustment of the position of the oil screen is also reset by a compression spring assembly. The body of each compression spring assembly is fixed on the side of the first oil screen facing the inside of the shell, and the pressure head of each compression spring assembly abuts against the end of each second oil screen away from each other. When the transmission rod drives the cam to rotate in a certain direction, the second oil screen at the corresponding position slides to the corresponding elastic member, so that the elastic member is compressed under stress. When the transmission rod reversely rotates, the force of the cam on the stop block on the second oil screen disappears, and then the second oil screen slides to the middle under the action of the restoring force of the elastic member. Limiting guide rails are arranged on the flanges of the first oil screen, and inserts are formed at the upper and lower ends of the second oil screen and slide with the limiting guide rails. The limiting guide rails play the role of sliding guide and limiting for the second oil screen. Limiting guide grooves extending left and right are formed on the limiting guide rails, the limiting guide grooves penetrate through one end of the limiting guide rail of the corresponding first oil screen away from the other first oil screen, and the penetrated end constitutes the entrance of the limiting guide groove.

[0004] However, the air inlet assembly in the above patent application still has certain deficiencies. The compression spring assembly and the limiting guide rail in the above patent application are fixed on the first oil screen. When the inner oil screen is installed and disassembled, the inner oil screen can only be moved to the extreme position laterally. In the process of disassembling and assembling the inner oil screen, the operator needs to always exert a lateral force on the inner oil screen. This makes the inner oil screen very laborious to install and disassemble, and the disassembly efficiency is not high.

[0005] Therefore, the oil screen device of the existing range hood still needs to be further improved. SUMMARY

[0006] The first technical problem to be solved by the present application is to provide an oil screen device for a range hood, which can make the disassembly and assembly process of each component of the oil screen more labor-saving and easy to operate.

[0007] The second technical problem to be solved by the present application is to provide a range hood applying the above oil screen device.

[0008] The technical scheme adopted by the present application to solve the first technical problem is:

[0009] An oil screen device for a range hood is arranged at an air inlet of the range hood, comprising a first oil screen and a second oil screen arranged in sequence along the airflow direction at the air inlet. The first oil screen is provided with a first air inlet hole, and the second oil screen is provided with a second air inlet hole. 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 of the second air inlet hole on the second oil screen and the first air inlet hole on the first oil screen.

[0010] Further comprising a guide locking module arranged on the back of the first oil screen. The guide locking module comprises a first positioning seat with a first sliding channel and a sliding member slidingly arranged in the first sliding channel. The sliding direction of the sliding member relative to the first positioning seat is parallel to the first direction. The sliding member has a first connecting end extending out of the first positioning seat and connected with the second oil screen. A pressing type elastic self-locking structure is arranged between the sliding member and the first positioning seat. The pressing type elastic self-locking structure is configured such that the sliding member can move between a locking position and an unlocking position at a distance in the first direction relative to the first positioning seat under the pressing of an external force.

[0011] As an improvement, in the moving direction of the second oil screen, the second oil screen has opposite first and second side edges, and the driving mechanism is arranged adjacent to the first side edge. When the sliding member moves to the locking position, the sliding member is away from the driving mechanism. When the sliding member moves to the unlocking position, the sliding member is close to the driving mechanism.

[0012] To achieve the general purpose, the pressing type elastic self-locking structure can adopt the existing cantilever pressing buckle, ball head-slot pressing buckle, bilateral symmetric pressing buckle, etc. However, in order to adapt to the movement process of the second oil screen, preferably, the guiding locking module further comprises a pull rod and an elastic reset member, the sliding member comprises a sliding block body and a first guiding rod connected with the sliding block body, the sliding block body is slidingly limited in the first sliding channel, the extending direction of the first guiding rod is parallel to the first direction, the first guiding rod is exposed to the first positioning seat, and the end of the exposed part of the first positioning seat is connected with the second oil screen, the sliding block body is provided with a track groove in the shape of a ring, the track groove is provided with a stop portion, the first end of the pull rod is swingably connected with the first positioning seat, the second end of the pull rod is provided with a limiting protrusion, during the movement of the sliding member relative to the first positioning seat, the limiting protrusion is unidirectionally slidably constrained in the track groove, the elastic reset member acts on the sliding member, and the sliding member always has a tendency to move in the second direction, the above-mentioned second direction is opposite to the first direction, when the sliding member is in the locking position, the second end of the pull rod abuts against the stop portion of the sliding member, and when the sliding member is in the unlocking position, the second end of the pull rod is separated from the stop portion of the sliding member.

[0013] As an improvement, the side of the track groove adjacent to the driving mechanism has a part with an internal recess of the track groove as the stop portion.

[0014] In order to achieve the unidirectional movement of the limiting protrusion of the pull rod along the track groove, the track groove comprises a first guiding section, a second guiding section, a third guiding section and a fourth guiding section connected in sequence, the first guiding section and the fourth guiding section further have a first limiting step at the joint position for blocking the limiting protrusion of the pull rod from returning from the first guiding section to the fourth guiding section, the first guiding section and the second guiding section have a second limiting step at the joint position for blocking the limiting protrusion of the pull rod from returning from the second guiding section to the first guiding section, the joint position of the second guiding section and the third guiding section is arranged at an angle to define the stop portion, the second guiding section and the third guiding section further have a third limiting step at the joint position for blocking the limiting protrusion of the pull rod from returning from the third guiding section to the second guiding section, and the joint position between the third guiding section and the second guiding section has a fourth limiting step for blocking the limiting protrusion of the pull rod from returning from the fourth guiding section to the third guiding section.

[0015] In order to achieve the air volume adjustment of the oil screen device on the basis of the pressing movement path of the second oil screen, the sliding member further has an intermediate position with a change of movement direction during the movement of the sliding member from the unlocking position to the locking position or from the locking position to the unlocking position.

[0016] When the sliding member is in the unlocking position, the second air inlet holes of the second oil screen are misaligned with the first air inlet holes on the first oil screen, so that the oil screen device is in a closed state;

[0017] When the sliding member is in the locking position, the wall of the first oil screen blocks part of the second air inlet holes of the second oil screen, and the wall of the second oil screen blocks part of the first air inlet holes of the first oil screen;

[0018] When the sliding member is in the intermediate position, the first air inlet holes of the first oil screen are opposite to the second air inlet holes of the second oil screen, so that the oil screen device is in a maximum open state.

[0019] The "change of moving direction" in the "intermediate position of change of moving direction" can be understood as the position where the sliding member first moves in the first direction and then changes to move in the second direction, or the position where the sliding member first moves in the second direction and then changes to move in the first direction.

[0020] The elastic return member can adopt various existing technologies, and can include various elastic elements such as compression springs, torsion springs, and spring sheets. In order to better cooperate with the sliding member, the elastic return member is a compression spring, which is arranged in the first sliding channel and abuts between the sliding member and the inner wall of the first sliding channel of the first positioning seat.

[0021] In order to facilitate the disassembly of the second oil screen, the second oil screen has a first branch arm extending outward at a side parallel to the moving direction of the second oil screen, and the first branch arm is detachably connected with the first guide rod.

[0022] In order to further facilitate the installation and disassembly of the second oil cup and the first guide rod, the end of the first branch arm is formed with a first roll-flange, the first roll-flange is internally provided with a first shaft sleeve for the end of the first guide rod to pass through, and the outer peripheral wall of the first guide rod is further provided with a first limiting step for abutting against the end of the first shaft sleeve.

[0023] In order to realize the connection between the first shaft sleeve and the first roll-flange, the first shaft sleeve includes a first shaft sleeve body and at least two first elastic arms arranged in sequence and spaced apart along the circumference of the first shaft sleeve body and extending in the axial direction, each of the first elastic arms has a first positioning protrusion protruding outward in the radial direction at an end away from the first shaft sleeve body, the end of the first shaft sleeve body has a first limiting flange protruding outward in the radial direction, and the end of the first roll-flange is further provided with a first limiting notch, in the installed state of the first shaft sleeve in the first roll-flange, the first limiting flange abuts against the end of the first roll-flange, and the first positioning protrusion of each of the first elastic arms is clamped into the first limiting notch.

[0024] In order to ensure the stability of the movement of the second oil screen, the second oil screen has opposite third and fourth side edges, the extending directions of the third and fourth side edges are parallel to the movement direction of the second oil screen, two first arms extending outward are arranged at the third and fourth side edges, and the guide locking module has two sliding members, and the two first arms are connected with the first connecting ends of the two sliding members, respectively.

[0025] In order to realize the quick disassembly and assembly of the guide locking module relative to the first oil screen, the first oil screen has a third folding edge and a fourth folding edge respectively at positions corresponding to the third and fourth side edges of the second oil screen, the third and fourth folding edges are folded towards the side where the second oil screen is located, and the guide locking module is arranged on the back surface of the first oil screen and is fixed through the first mounting frame.

[0026] In order to further ensure the stability of the movement of the second oil screen relative to the first oil screen, a guide module detachably connected to the back surface of the first oil screen is further arranged, the guide module comprises a second positioning seat, a second guide rod and a second elastic member, the second positioning seat has a second sliding groove extending along the movement direction of the second oil screen, the second guide rod is axially slidably limited in the second sliding groove, and one end of the second guide rod is exposed outside the second sliding groove as a second connecting end connected with the second oil screen, and the second elastic member is arranged in the second sliding groove and acts on the second guide rod, so that the second guide rod always has a tendency to move in the direction opposite to the first direction.

[0027] As an improvement, the second oil screen further has a second arm extending outward at the side edge parallel to the movement direction of the second oil screen, and the second arm is detachably connected with the second guide rod.

[0028] Further improvement, the end of the second arm is formed with a second round folding edge, the second round folding edge is provided with a second shaft sleeve for the end of the second guide rod to pass through, and the outer peripheral wall of the second guide rod further has a second stop step for abutting against the end of the second shaft sleeve.

[0029] Further improvement, the second oil screen has opposite third and fourth side edges, the extending directions of the third and fourth side edges are parallel to the movement direction of the second oil screen, two second arms extending outward are arranged at the third and fourth side edges, and the guide module has two second guide rods, and the two second arms are connected with the second guide rods of the two guide modules, respectively.

[0030] Further improvement, the first oil screen has third and fourth flanges respectively folded towards the side where the second oil screen is located at the corresponding positions of the third and fourth sides of the second oil screen, and the third and fourth flanges are respectively provided with detachable second mounting frames, and the guide module is attached to the back of the first oil screen and fixed through the second mounting frames.

[0031] In order to adapt to the left and right two burners of the bottom of the range hood, and to facilitate the targeted air volume adjustment according to the cooking conditions on the left and right sides, the first oil screen has a first air inlet area and a second air inlet area arranged in sequence along a first direction and both distributed with first air inlet holes, and the second oil screen has two and is arranged in sequence along the first direction, wherein one of the second oil screens is opposite to the first air inlet area of the first oil screen, and the other second oil screen is opposite to the second air inlet area of the first oil screen, and the two second oil screens are driven by the same driving mechanism and can move relative to the first oil screen, so as to change the air inlet state of the air inlet area on the side where the second oil screen is located. The two air inlet areas (i.e. the first air inlet area and the second air inlet area) on the first oil screen can be two regions on an integrated oil screen, or air inlet areas corresponding to two independent sub-oil screens.

[0032] The technical scheme adopted by the present application to solve the second technical problem is:

[0033] A range hood, comprising a housing, an air inlet is formed on the housing, and an oil screen is arranged at the air inlet, wherein the oil screen adopts the oil screen device for the range hood.

[0034] Compared with the prior art, the advantages of the present application are: the second oil screen of the oil screen device is connected with the first oil cup through the guide locking module, and during the movement of the second oil screen, the function of flow distribution of the range hood can be realized, the cooking experience of the user can be optimized according to the actual cooking condition, and on this basis, the press-type elastic locking structure is arranged between the second oil screen and the first oil screen, the second oil screen can be kept in the locked state, so that the operator does not need to exert a lateral force on the second oil screen, the second oil screen can be quickly separated from the first oil screen, the disassembly efficiency is improved, and the user can clean each part of the oil screen device separately. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 It is a front perspective view of the oil screen device of the embodiment of the present application;

[0036] Figure 2 It is a rear view of the oil screen device of the embodiment of the present application;

[0037] Figure 3 It is a perspective view of the right side part of the oil screen device of the embodiment of the present application;

[0038] Figure 4 exploded view of the right side portion of the oil screen device of an embodiment of the present application;

[0039] Figure 5 rear view of the partial structure of the right side portion of the oil screen device of an embodiment of the present application (the slider is in the unlocked position);

[0040] Figure 6 rear view of the partial structure of the right side portion of the oil screen device of an embodiment of the present application (the slider is in the intermediate position);

[0041] Figure 7 rear view of the partial structure of the right side portion of the oil screen device of an embodiment of the present application (the slider is in the locked position);

[0042] Figure 8 exploded view of the guide locking module of an embodiment of the present application;

[0043] Figure 9 perspective view of the slider of the guide locking module of an embodiment of the present application;

[0044] Figure 10 exploded view of the guide module of an embodiment of the present application. DETAILED DESCRIPTION

[0045] The present application will be further described by the following embodiments with reference to the drawings.

[0046] In the specification and claims of the present application, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present application, but these terms are used herein only for the purpose of convenience of explanation and are determined based on the example orientation shown in the drawings. Since the disclosed embodiments of the present application can be arranged in different directions, these terms indicating directions are only for illustration and should not be considered as limiting, such as "upper" and "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

[0047] Figures 1-10An oil screen device for a range hood and a preferred embodiment of the range hood are shown. The range hood comprises a housing and a centrifugal fan arranged in the housing. The housing generally comprises a fan frame and a hood arranged at the bottom of the fan frame. The inner cavity of the fan frame is connected with the inner cavity of the hood. An air inlet is arranged on the front side wall of the hood. External smoke can enter the hood through the air inlet. The centrifugal fan is arranged in the fan frame. The centrifugal fan generates negative pressure when it operates. External oil fume can be sucked into the hood through the air inlet. The oil screen device is arranged at the air inlet of the hood for filtering oil fume. An oil cup is arranged at the bottom of the hood. The oil cup is in the shape of a long strip extending left and right. The oil cup is used for receiving oil stains flowing down from the hood.

[0048] Figure 1 and Figure 2 The structure of the front and back angles of the oil screen device is shown. The oil screen device comprises a first oil screen 10 and a second oil screen 20 arranged at the back of the first oil screen 10. That is, the first oil screen 10 and the second oil screen 20 are arranged in sequence along the airflow direction at the air inlet. The first oil screen 10 is provided with first air inlets 100, and the second oil screen 20 is provided with second air inlets 200. The first air inlets 100 and the second air inlets 200 are both strip-shaped holes with the same extension direction. The first oil screen 10 has a first air inlet area 101 and a second air inlet area 102 arranged in sequence along a first direction A1 and both distributed with the first air inlets 100. The second oil screen 20 has two second oil screens arranged in sequence along the first direction A1. One of the second oil screens is opposite to the first air inlet area 101 of the first oil screen 10, and the other second oil screen is opposite to the second air inlet area 102 of the first oil screen 10. Specifically, the first oil screen 10 comprises two sub-oil screens 11 arranged in sequence along the first direction A1. The two sub-oil screens 11 constitute the first air inlet area 101 and the second air inlet area 102 of the first oil screen 10. The second oil screen 20 can be driven by a driving mechanism to move linearly relative to the first oil screen 10 along the first direction A1. The first direction A1 is parallel to the extension direction of the first oil screen 10. When the second oil screen 20 moves relative to the first oil screen 10, the relative positions of the second air inlets 200 on the second oil screen 20 and the first air inlets 100 on the first oil screen 10 change. In this way, the overlapping area of the first air inlets 100 and the second air inlets 200 in the flow direction at the air inlet changes, achieving the purpose of adjusting the air inlet flow rate.

[0049] One of the sub-oil nets 11 of the first oil net 10 and the corresponding second oil net 20 constitute an oil net unit. The oil net device of the embodiment includes two oil net units that are sequentially spliced and symmetrically arranged. The moving actions of the second oil nets 20 of the two oil net units are independent of each other, and the adjustment of the air inlet volume is also independent of each other, so as to adapt to the cooking conditions on the left and right sides of the range hood. The two second oil nets 20 of the embodiment are driven by the same driving mechanism (not shown) to move relative to the first oil net 10 (the corresponding sub-oil net 11), so as to change the air inlet state of the air inlet area on the side where the second oil net 20 is located. The driving mechanism is generally arranged at the position where the two oil net units are connected, and the driving mechanism for driving the second oil net 20 to move can adopt various motion mechanisms formed by the cooperation of a driving motor and a swing arm or a cam transmission in the prior art, such as the motion mechanism of the Chinese utility model patent application with the application number CN202120687387.8 (the authorization announcement number is CN215570676U).

[0050] Referring to Figure 3 and Figure 4 Taking one of the sub-oil nets 11 of the first oil net 10 and the corresponding second oil net 20 as an example, the first oil net 10 (the sub-oil net 11) has two opposite sides in the first direction, and each of the two sides has a folded edge extending towards the side where the second oil net 20 is located. The two folded edges are respectively a first folded edge 12 and a second folded edge 13. The extension directions of the first folded edge 12 and the second folded edge 13 are perpendicular to the first direction A1. The first oil net 10 also has two opposite sides in the direction perpendicular to the first direction A1, and each of the two sides of the first oil net 10 has a folded edge extending towards the side where the second oil net 20 is located. The two folded edges are respectively a third folded edge 14 and a fourth folded edge 15, and the extension directions of the third folded edge 14 and the fourth folded edge 15 are parallel to the first direction. The corresponding side edges of the second oil net and the four folded edges of the first oil net are respectively a first side edge 201, a second side edge 202, a third side edge 203, and a fourth side edge 204. Among them, the extension directions of the first side edge 201 and the second side edge 202 are perpendicular to the first direction, and the extension directions of the third side edge 203 and the fourth side edge 204 are parallel to the first direction.

[0051] The four corner positions or positions adjacent to the four corners of the back surface of the first oil net 10 are provided with guide modules and guide locking modules. Among them, two guide modules 40 are arranged at the positions of the two corner regions away from the driving mechanism, and two guide locking modules 30 are arranged at the positions of the two corner regions adjacent to the driving mechanism.

[0052] The guide modules 40 and the guide locking modules 30 are detachably connected to the back of the first oil screen 10. The third side edge 203 and the fourth side edge 204 of the second oil screen 20 are respectively provided with a first branch arm 21 and a second branch arm 22 which are spaced apart along the moving direction of the second oil screen 20 and extend outwardly from the side edges. The two first branch arms 21 of the second oil screen 20 are respectively connected to the two guide locking modules 30, and the two second branch arms 22 are respectively connected to the two guide modules 40.

[0053] The guide locking module 30 comprises a first positioning seat 31, a sliding piece 33, an elastic reset piece 333 and a pull rod 334. The first positioning seat 31 is a long square structure, comprising a first seat body 314 and a first cover body 313. The first cover body 313 is connected to the first seat body 314 by a plurality of extended elastic buckles 3130, and the first cover body 313 and the first seat body 314 cooperatively define a first sliding channel 310 extending along the first direction A1. The sliding piece 33 comprises a sliding block body 331 and a first guide rod 32 extending from the sliding block body 331 along the first direction A1. The sliding block body 331 of the sliding piece 33 is axially slidingly limited in the first sliding channel 310, and one end of the first guide rod 32 of the sliding piece 33 is exposed outside the first sliding channel 310 as a first connecting end connected to the first branch arm 21 of the second oil screen 20. The elastic reset piece 333 is preferably a first reset spring which is arranged in the first sliding channel 310 and specifically abuts between the sliding block body 331 and the inner wall of the limiting sliding channel 310 of the first positioning seat 31. Under the action of the first reset spring, the first guide rod 32 (i.e. the sliding piece 33) always has a tendency to move along the second direction A2 which is opposite to the first direction A1 and parallel to the extending direction of the second oil screen 20.

[0054] Referring to Figures 5-9The sliding piece 33 of the guiding locking module 30 and the first positioning seat 31 are provided with a press-type elastic self-locking structure configured to allow the sliding piece 33 to move between a locked position and an unlocked position at a distance in the first direction A1 under the press of an external force. A driving mechanism for moving the second oil screen 20 is arranged adjacent to the first side edge 201. Specifically, the inner side of the first side edge 201 of the second oil screen 20 is provided with an inwardly folded pressing plate 26, and the power output end of the driving mechanism can act on the pressing plate 26 to drive the second oil screen 20 to move in the first direction A1. When the sliding piece 33 moves to the locked position, the sliding piece 33 (which can also be understood as the first side edge 201 of the second oil cup) is away from the driving mechanism, and when the sliding piece 33 moves to the unlocked position, the sliding piece 33 is close to the driving mechanism. More specifically, when the sliding piece 33 is in the locked position, the distance between the end of the first guiding rod 32 and the first flange 12 of the first oil screen 10 is large enough to allow the first shaft sleeve 23 of the second oil screen 20 to be installed on the end of the first guiding rod 32, that is, in this state, the distance L1 between the end of the first guiding rod 32 and the first flange 12 of the first oil screen 10 is greater than the distance L2 from the end of the first shaft sleeve 23 of the second oil screen 20 away from the first flange 12 to the first flange 12, which can also be understood as that when the first side edge 201 of the second oil screen 20 abuts against the first flange 12 of the first oil screen 10, the end of the first shaft sleeve 23 of the second oil screen 20 away from the first flange 12 is located to the left of the end of the first guiding rod 32 (i.e., close to the side of the first flange 12).

[0055] The sliding block body 331 of the sliding piece 33 is provided with a track groove 332 in the shape of a ring, and the track groove 332 is provided with a stop portion 3320. The first end and the second end of the pull rod 334 are both provided with a bent hook portion, the hook portion of the first end of the pull rod 334 is swingably connected in the insertion hole of the first positioning seat 31, the hook portion of the second end of the pull rod 334 is a limiting protrusion 3340, and the limiting protrusion 3340 is unidirectionally slidably constrained in the track groove 332 during the movement of the sliding piece 33 relative to the first positioning seat 31. The side portion of the track groove 332 adjacent to the driving mechanism is provided with a portion of the track groove 332 that is internally recessed as the stop portion 3320. In order to realize the unidirectional movement of the limiting protrusion 3340 of the pull rod 334 along the track groove 332, the track groove 332 comprises a first guide segment 3321, a second guide segment 3322, a third guide segment 3323 and a fourth guide segment 3324 that are sequentially and circularly connected, the first guide segment 3321 and the fourth guide segment 3324 are further provided with a first limiting step 3325 at the joint position for blocking the limiting protrusion 3340 of the pull rod from returning from the first guide segment 3321 to the fourth guide segment 3324, the first guide segment 3321 and the second guide segment 3322 are provided with a second limiting step 3326 at the joint position for blocking the limiting protrusion 3340 of the pull rod from returning from the second guide segment 3322 to the first guide segment 3321, the joint position of the second guide segment 3322 and the third guide segment 3323 is arranged at an angle to define the stop portion 3320, the second guide segment 3322 and the third guide segment 3323 are further provided with a third limiting step 3327 at the joint position for blocking the limiting protrusion 3340 of the pull rod from returning from the third guide segment 3323 to the second guide segment 3322, and the joint position between the third guide segment 3323 and the second guide segment 3322 is provided with a fourth limiting step 3328 for blocking the limiting protrusion 3340 of the pull rod from returning from the fourth guide segment 3324 to the third guide segment 3323. When the sliding piece 33 is in the locked position, the second end of the pull rod 334 abuts against the stop portion 3320 of the sliding piece 33, and when the sliding piece 33 is in the unlocked position, the second end of the pull rod 334 is separated from the stop portion 3320 of the sliding piece 33. More specifically, there is an intermediate position with a change in the direction of movement during the movement of the sliding piece 33 from the unlocked position to the locked position or from the locked position to the unlocked position; when the sliding piece 33 is in the unlocked position, the second air inlet hole 200 of the second oil screen 20 is misaligned with the first air inlet hole 100 on the first oil screen 10, so that the oil screen device is in a closed state; when the sliding piece 33 is in the locked position, the wall of the first oil screen 10 blocks part of the area of each second air inlet hole of the second oil screen 20, and the wall of the second oil screen 20 blocks part of the first air inlet hole 100 of the first oil screen 10; when the sliding piece 33 is in the intermediate position, each first air inlet hole 100 of the first oil screen 10 is opposite to each second air inlet hole 200 of the second oil screen 20, so that the oil screen device is in a maximum open state.The structure design can not only realize the function of flow distribution of the range hood during the movement of the second oil screen 20, but also optimize the cooking experience of the user according to the actual cooking condition. On this basis, the press-type elastic locking structure is arranged between the second oil screen 20 and the first oil screen 10, and the second oil screen 20 can be stopped in the locked state. Therefore, the operator does not need to exert a lateral force on the second oil screen 20, so that the second oil screen 20 can be quickly separated from the first oil screen 10, the disassembly and assembly efficiency is improved, and the user can clean each part of the oil screen device separately.

[0056] The first oil screen 10 is provided with a detachable first mounting frame 161 at a position corresponding to the two guide locking modules 30 of the second oil screen 20. The two first mounting frames 161 are respectively connected to the inner sides of the third flange 14 and the fourth flange 15 of the first oil screen 10 through fasteners. The two guide locking modules 30 are attached to the back of the first oil screen 10 and are fixed through the first mounting frame 161. The first oil screen 10 is provided with a detachable second mounting frame 162 at a position corresponding to the two guide modules 40 of the second oil screen 20. One of the second mounting frames 162 is connected to the inner sides of the third flange 14 and the second flange 13 of the first oil screen 10 through a fastener, and the other second mounting frame 162 is connected to the inner sides of the fourth flange 15 and the second flange 13 of the first oil screen 10 through a fastener. The two guide modules 40 are attached to the back of the first oil screen 10 and are fixed through the first mounting frame 161.

[0057] Taking the right oil screen unit of the oil screen device as an example, the installation process is as follows:

[0058] 1. Place the guide locking module 30 on the left side of the first oil screen 10 corresponding to the position, and position and install it through the first mounting frame 161. The guide module 40 on the right side is installed through the second mounting frame 162.

[0059] 2. Press the end of the first guide rod 32 of the guide locking module 30, and push the sliding piece 33 of the guide locking module 30 to the right. The pull rod 334 moves along the track groove 332 of the sliding piece 33 until it hooks the stop portion 3320 of the track groove 332. At this time, the end of the first guide rod 32 of the guide locking module 30 is relatively far away from the first flange 12 of the first oil screen 10, which can facilitate the installation of the second oil screen 20.

[0060] 3. The second roll-round flange 221 on the right second arm 22 of the second oil screen 20 is inserted into the second guide rod 42 of the corresponding guide module 40, and the oil screen is pushed to move right; then the first roll-round flange 211 on the left side of the second oil screen 20 is inserted into the first guide rod 32 of the corresponding locking guide module 40, and the oil screen is pushed to move right and then released, the locking pull rod 334 moves along the track groove 332 and is separated from the stop portion 3320, then the sliding piece 33 moves left under the action of the elastic return piece 333 until the second ventilation hole of the second oil screen 20 and the first ventilation hole of the first oil screen 10 are completely misaligned or completely overlapped, at this time, the right oil screen unit of the oil screen device is installed.

[0061] The user can choose to only remove the second oil screen 20 each time for cleaning, that is, to clean the second oil screen 20 and the first oil screen 10 with the guide modules 40 and the guide locking modules 30 separately, if the user wants to clean the oil screen device and the guide modules 40 and the guide locking modules 30 deeply, only the corresponding first mounting frame 161 and the second mounting frame 162 need to be additionally removed.

[0062] The guide module 40 comprises a second positioning seat 41, a second guide rod 42 and a second elastic piece 43. The second positioning seat 41 is a long square structure, comprising a second seat body 412 and a second cover body 411, the second cover body 411 is connected with the second seat body 412 through a plurality of extended elastic buckles, and the second cover body 411 and the second seat body 412 cooperate to define a second sliding channel 410 extending in the first direction, wherein the second sliding channel 410 is a stepped hole structure (having two steps) with a large diameter in the middle and small diameters on the left and right sides. The second guide rod 42 is axially slidingly limited in the second sliding channel 410, and one end thereof is exposed outside the second sliding channel 410 as a second connecting end connected with the second arm 22 of the second oil screen 20. The second elastic piece 43 is preferably a second return spring, which is arranged in a middle section of the second sliding channel 410 and is sleeved outside the second guide rod 42. The second guide rod 42 has a second limiting stop portion protruding radially outward. The second return spring is abutted between the second limiting stop portion 420 of the second guide rod 42 and the inner wall of the second sliding channel 410, and under the action of the second return spring, the second guide rod 42 always has a tendency to move in the second direction.

[0063] The first connecting end of the two first guide rods 32 and the first arm 21 of the second oil screen 20 are connected in a detachable manner, and the second connecting end of the two second guide rods 42 and the two second arms 22 of the second oil screen 20 are connected in a detachable manner.

[0064] The end of the first supporting arm 21 is formed with a first roll flange 211, and the end of the first roll flange 211 is also provided with a first limiting notch 2110. Due to the machining precision, the first roll flange 211 cannot be directly inserted into the end of the first guide rod 32, otherwise, the first roll flange 211 is prone to shaking. Therefore, the first roll flange 211 is internally provided with a first shaft sleeve 23 (preferably made of plastic) for penetrating the first connecting end of the first guide rod 32. The first shaft sleeve 23 comprises a first shaft sleeve body 231 and at least two first elastic arms 232 which are sequentially and spaced apart along the circumference of the first shaft sleeve body 231 and extend in the axial direction. Since the first elastic arms 232 can swing, the internal space surrounded by the first elastic arms 232 can also shrink or expand in the radial direction. Each first elastic arm 232 has a first protruding portion 2320 which protrudes outward in the radial direction at a distance away from the first shaft sleeve body 231. The end of the first shaft sleeve body 231 has a first limiting block 233 which protrudes outward in the radial direction. In the installed state of the first shaft sleeve 23 in the first roll flange 211, the first limiting block 233 abuts against the end of the first roll flange 211, and the first protruding portion 2320 of each first elastic arm 232 is correspondingly clamped into each first limiting notch 2110 of the first roll flange 211, so that the first roll flange 211 can limit the first shaft sleeve 23 in the axial and circumferential directions. When the guide locking module 30 is installed, the first connecting end of the first guide rod 32 can be directly inserted into the first shaft sleeve 23. Similarly, the end of the second supporting arm 22 is formed with a second roll flange 221, and the end of the second roll flange 221 is also provided with a second limiting notch 2210. The second roll flange 221 is internally provided with a second shaft sleeve 25 (preferably made of plastic) for penetrating the second connecting end of the second guide rod 42. The second shaft sleeve 25 comprises a second shaft sleeve body 251 and at least two second elastic arms 252 which are sequentially and spaced apart along the circumference of the second shaft sleeve body 251 and extend in the axial direction. Since the second elastic arms 252 can swing, the internal space surrounded by the second elastic arms 252 can also shrink or expand in the radial direction. Each second elastic arm 252 has a second protruding portion 2520 which protrudes outward in the radial direction at a distance away from the second shaft sleeve body 251. The end of the second shaft sleeve body 241 has a second limiting block 253 which protrudes outward in the radial direction. In the installed state of the second shaft sleeve 25 in the second roll flange 221, the second limiting block 253 abuts against the end of the second roll flange 221, and the second protruding portion 2520 of each second elastic arm 252 is correspondingly clamped into each second limiting notch 2210 of the second roll flange 221, so that the second roll flange 221 can limit the second shaft sleeve 25 in the axial and circumferential directions. When the guide module 40 is installed, the second connecting end of the second guide rod 42 can be directly inserted into the second shaft sleeve 25.

[0065] On the basis of the above embodiments, other embodiments can be obtained by replacing and improving the related technical features. For example, the above-mentioned guide module can be replaced by a guide locking module, that is, four corner portions of the first oil screen are provided with guide locking modules. Of course, one of the two guide locking modules described above can also be replaced by a guide module, that is, one guide locking module and three guide modules are arranged on the four corner portions of the first oil screen.

Claims

1. An oil screen device for a range hood, arranged at an air inlet of the range hood, comprising a first oil screen (10) and a second oil screen (20) arranged in sequence along a direction of air flow at the air inlet, the first oil screen (10) being provided with first air inlet holes (100), the second oil screen (20) being provided with second air inlet holes (200), the second oil screen (20) being driven by a driving mechanism to move linearly relative to the first oil screen (10) in a first direction (A1) so as to change a relative position of the second air inlet holes (200) on the second oil screen (20) and the first air inlet holes (100) on the first oil screen (10); characterized in that further comprising a guide locking module (30) arranged on a back surface of the first oil screen (10), the guide locking module (30) comprising a first positioning seat (31) provided with a first slide (310) and a sliding member (33) slidingly arranged in the first slide (310), a sliding direction of the sliding member (33) relative to the first positioning seat (31) being parallel to the first direction (A1), the sliding member (33) having a first connecting end extending out of the first positioning seat (31) and connected to the second oil screen (20), a pressing type elastic self-locking structure being arranged between the sliding member (33) and the first positioning seat (31), the pressing type elastic self-locking structure being configured such that the sliding member (33) is pressed by an external force to move between a locked position and an unlocked position of the sliding member (33) relative to the first positioning seat (31) in the first direction (A1) by a certain distance; further comprising a guide module (40) detachably connected to the back surface of the first oil screen (10), the guide module (40) comprising a second positioning seat (41), a second guide rod (42) and a second elastic member (43), the second positioning seat (41) being provided with a second slide (410) extending in a moving direction of the second oil screen (20), the second guide rod (42) being axially slidingly positioned in the second slide (410) and having one end extending out of the second slide (410) as a second connecting end connected to the second oil screen (20), the second elastic member (43) being arranged in the second slide (410) and acting on the second guide rod (42) so that the second guide rod (42) always has a tendency to move in a direction opposite to the first direction (A1).

2. The oil mist filter device for a range hood according to claim 1, characterized by: In the moving direction of the second oil screen (20), the second oil screen (20) has a first side edge (201) and a second side edge (202) opposite to each other, the driving mechanism being arranged adjacent to the first side edge (201), the sliding member (33) being away from the driving mechanism when the sliding member (33) moves to the locked position, the sliding member (33) being close to the driving mechanism when the sliding member (33) moves to the unlocked position.

3. The oil mist filter device for a range hood according to claim 2, characterized in that: The guiding and locking module (30) further comprises a pull rod (334) and an elastic reset member (333), the sliding member (33) comprises a sliding block body (331) and a first guiding rod connected with the sliding block body (331), the sliding block body is slidingly limited in the first slide (310), the extending direction of the first guiding rod (32) is parallel to the first direction (A1), the first guiding rod (32) is exposed to the first positioning seat (31), and the end of the exposed part of the first positioning seat (31) is connected with the second oil screen (20), the sliding block body (331) is provided with an annular track groove (332), the track groove (332) is provided with a stop portion (3320), the first end of the pull rod (334) is swingably connected with the first positioning seat (31), the second end of the pull rod (334) is provided with a limiting protrusion (3340), during the movement of the sliding member (33) relative to the first positioning seat (31), the limiting protrusion (3340) is unidirectionally and slidingly constrained in the track groove (332), the elastic reset member (333) acts on the sliding member (33) and makes the sliding member (33) always have a moving tendency along the second direction (A2), the second direction (A2) is opposite to the first direction (A1), when the sliding member (33) is in the locking position, the second end of the pull rod (334) abuts against the stop portion (3320) of the sliding member (33), when the sliding member (33) is in the unlocking position, the second end of the pull rod (334) is separated from the stop portion (3320) of the sliding member (33).

4. The oil mist filter device for a range hood according to claim 3, characterized in that: The side of the track groove (332) adjacent to the driving mechanism is provided with a part, which is recessed in the track groove (332), as the stop portion (3320).

5. The oil mist filter device for a range hood according to claim 4, characterized in that: The track groove (332) comprises a first guide section (3321), a second guide section (3322), a third guide section (3323) and a fourth guide section (3324) connected in sequence, the first guide section (3321) and the fourth guide section (3324) are further provided with a first limiting step (3325) for blocking the limiting protrusion (3340) of the pull rod from returning from the first guide section (3321) to the fourth guide section (3324) at the joint position, the first guide section (3321) and the second guide section (3322) are further provided with a second limiting step (3326) for blocking the limiting protrusion (3340) of the pull rod from returning from the second guide section (3322) to the first guide section (3321) at the joint position, the joint position of the second guide section (3322) and the third guide section (3323) is arranged at an angle to define the stop portion (3320), the second guide section (3322) and the third guide section (3323) are further provided with a third limiting step (3327) for blocking the limiting protrusion (3340) of the pull rod from returning from the third guide section (3323) to the second guide section (3322) at the joint position, and the joint position between the third guide section (3323) and the fourth guide section (3324) is provided with a fourth limiting step (3328) for blocking the limiting protrusion (3340) of the pull rod from returning from the fourth guide section (3324) to the third guide section (3323).

6. The oil screen device for the range hood according to claim 5, characterized in that: The sliding member (33) further has an intermediate position with a change of moving direction during movement from the unlocking position to the locking position or from the locking position to the unlocking position. When the sliding member (33) is in the unlocking position, the second air inlet holes (200) of the second oil screen (20) are misaligned with the first air inlet holes (100) on the first oil screen (10), so that the oil screen device is in a closed state. When the sliding member (33) is in the locking position, the wall of the first oil screen (10) blocks part of the second air inlet holes of the second oil screen (20), and the wall of the second oil screen (20) blocks part of the first air inlet holes (100) of the first oil screen (10). When the sliding member (33) is in the intermediate position, each first air inlet hole (100) of the first oil screen (10) is opposite to each second air inlet hole (200) of the second oil screen (20), so that the oil screen device is in a maximum open state.

7. The oil mesh device for the range hood according to claim 3, characterized in that: The elastic reset member (333) is a compression spring arranged in the first sliding channel (310) and abutting between the sliding member (33) and the inner wall of the first sliding channel (310) of the first positioning seat (31).

8. The oil mesh device for the range hood according to claim 3, characterized in that: The second oil screen (20) is provided with a first supporting arm (21) extending outward at a side parallel to the moving direction of the second oil screen (20), and the first supporting arm (21) is detachably connected with the first guide rod.

9. The oil mist filter device for a range hood according to claim 8, characterized in that: The end of the first supporting arm (21) is formed with a first roll flange (211), and a first shaft sleeve (23) is arranged in the first roll flange (211) for the end of the first guide rod to pass through.

10. The oil screen device for the range hood according to claim 9, characterized in that: The first shaft sleeve (23) comprises a first shaft sleeve body (231) and at least two first elastic arms (232) arranged in sequence and spaced apart along the circumference of the first shaft sleeve body (231) and extending in the axial direction, and each first elastic arm (232) has a first positioning protrusion (2320) protruding outward in the radial direction at one end away from the first shaft sleeve body (231), and the end of the first shaft sleeve body (231) has a first limiting stop (233) protruding outward in the radial direction, and the end of the first roll flange (211) is also provided with a first limiting notch (2110), and in the installed state of the first shaft sleeve (23) in the first roll flange (211), the first limiting stop (233) abuts against the end of the first roll flange (211), and the first positioning protrusion (2320) of each first elastic arm (232) is clamped into the first limiting notch (2110).

11. The oil screen device for the range hood according to claim 8, characterized in that: The second oil screen (20) has opposite third and fourth side edges (203) and (204), and the extending directions of the third and fourth side edges (203) and (204) are parallel to the moving direction of the second oil screen (20), and each of the third and fourth side edges (203) and (204) is provided with two first supporting arms (21) extending outward, and the guide locking module (30) has two, and the two first supporting arms (21) are connected with the first connecting ends of the sliders (33) of the two guide locking modules (30) respectively.

12. The oil screen device for a range hood according to claim 11, characterized in that: The first oil screen (10) has third and fourth flanges (14) and (15) respectively folded towards the side where the second oil screen (20) is located at the positions corresponding to the third and fourth side edges (203) and (204) of the second oil screen (20), and each of the third and fourth flanges (14) and (15) is provided with a detachable first mounting bracket (161), and the guide locking module (30) abuts against the back of the first oil screen (10) and is fixed through the first mounting bracket (161).

13. The oil screen device for the range hood according to claim 1, characterized in that: The second oil screen (20) is also provided with second supporting arms (22) extending outward at the side edges parallel to the moving direction of the second oil screen (20), and the second supporting arms (22) are detachably connected with the second guide rods.

14. The oil screen device for a range hood according to claim 13, characterized in that: The end of the second supporting arm (22) is formed with a second roll flange (221), and a second shaft sleeve (25) is arranged in the second roll flange (221) for the end of the second guide rod to pass through, and the outer peripheral wall of the second guide rod is also provided with a second stop step (420) abutting against the end of the second shaft sleeve (25).

15. The oil screen device for a range hood according to claim 13, characterized in that: The second oil screen (20) has opposite third side (203) and fourth side (204), the extension direction of the third side (203) and the fourth side (204) are parallel to the moving direction of the second oil screen (20), the third side (203) and the fourth side (204) are provided with two second arms (22) extending outward, the guiding module (40) has two second guiding rods, and the two second arms (22) are connected with the two second guiding rods respectively.

16. The oil screen device for a range hood according to claim 15, characterized in that: The first oil screen (10) has third flanging (14) and fourth flanging (15) folded to the side of the second oil screen (20) at the corresponding position of the third side (203) and the fourth side (204) of the second oil screen (20), the third flanging (14) and the fourth flanging (15) are provided with detachable second mounting frame (162), the guiding module (40) is attached to the back of the first oil screen (10) and is fixed through the second mounting frame (162).

17. The oil screen device for the range hood according to any one of claims 1 to 16, characterized in that: The first oil screen (10) has first air inlet area (101) and second air inlet area (102) arranged in the first direction (A1) in sequence and distributed with first air inlet hole (100), the second oil screen (20) has two, and is arranged in the first direction (A1) in sequence, one of the second oil screen (20) is opposite to the first air inlet area (101) of the first oil screen (10), and the other second oil screen (20) is opposite to the second air inlet area (102) of the first oil screen (10), the two second oil screens (20) are driven by the same driving mechanism and can move relative to the first oil screen (10), so as to change the air inlet state of the air inlet area on the side of the second oil screen (20).

18. A range hood comprising a housing, an air inlet being formed in the housing, and an oil screen being arranged at the air inlet, characterized in that: The oil screen uses the oil screen device of the range hood in any one of claims 1-17.

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