Range hood

Abstract

The present application relates to a kind of range hood, comprising: casing;Oil cup, is located in the bottom of the casing;Further comprising the movement mechanism being located in the bottom of the casing, the oil cup is connected with the movement mechanism, and can be driven by the movement mechanism and have the folding state of folding in the bottom of casing and the display state of moving to the front lower side of the casing.When the oil amount in the oil cup needs to be viewed, the oil cup can be presented to the front lower side of the casing by the movement mechanism, so that the oil amount in the oil cup is clearly and intuitively observed, and the disassembly and installation of the oil cup are also facilitated.At the same time, when the oil amount in the oil cup does not need to be viewed or the oil cup is disassembled, the oil cup is driven by the movement mechanism to hide in the bottom of the casing, which ensures the overall appearance of the range hood.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a range hood. BACKGROUND

[0002] A range hood is a common kitchen appliance. The range hood works by using the principle of fluid dynamics. It generates a negative pressure suction force through a centrifugal fan installed inside the range hood, which sucks the oil fume below the range hood into the centrifugal fan, accelerates it, and then guides it to be discharged outdoors, thereby purifying the kitchen environment. During the process of discharging the oil fume flow, most of the oil is separated out, so an oil collecting cup is usually installed at the bottom of the smoke collecting hood of the range hood to collect the separated oil.

[0003] Currently, there are several ways to check the oil amount in the oil cup of the range hood, but each has its own shortcomings: one is to directly disassemble the oil cup to check, which is very inconvenient. The second is to set a transparent plastic area in the middle of the oil cup for users to check, but the display effect is not obvious, users need to tilt their heads and necks to check, and the transparent plastic in the middle is in contact with oil stains for a long time, which can easily turn yellow and dark, affecting the user's judgment. The third is to add a sensor to the oil cup to detect whether the oil amount has reached the warning line, but the addition of the sensor increases the production cost, on the other hand, the sensor is contaminated by oil fume, which not only easily causes recognition errors, but also has the risk of damage over time. For example, the oil cup structure and the range hood applying the same disclosed in application No. 202222494762.4.

[0004] Therefore, the existing range hood still needs to be further improved. SUMMARY

[0005] The present application solves the technical problem of the prior art by providing a range hood that allows users to clearly and intuitively check the oil amount in the oil cup.

[0006] The technical solution adopted by the present application to solve the technical problem is as follows: a range hood, comprising:

[0007] a casing;

[0008] an oil cup arranged at the bottom of the casing;

[0009] further comprising a movement mechanism arranged at the bottom of the casing, the oil cup being connected to the movement mechanism and being capable of being driven by the movement mechanism to have a folded state in which it is folded at the bottom of the casing and a display state in which it is moved to the front lower side of the casing.

[0010] As an improvement, the moving mechanism comprises a driving motor and a four-bar linkage assembly, an output shaft of the driving motor is in transmission connection with a power input end of the four-bar linkage assembly, and the oil cup is detachably connected to a power output end of the four-bar linkage assembly.

[0011] As a further improvement, the four-bar linkage assembly is in a folded state when the oil cup is in the collapsed state, and the four-bar linkage assembly is in a forward and downward stretching state when the oil cup is in the display state.

[0012] As an improvement, the four-bar linkage assembly comprises a first connecting rod, a second connecting rod and a third connecting rod, a first end of the first connecting rod and a first end of the second connecting rod are both rotationally connected to the bottom of the casing, a second end of the first connecting rod and a second end of the second connecting rod are both rotationally connected to the third connecting rod, an output shaft of the driving motor is in transmission connection with the first end of the first connecting rod or the first end of the second connecting rod, thereby driving the corresponding first connecting rod or second connecting rod to swing forward and backward, and the oil cup is detachably connected to the third connecting rod.

[0013] In order to realize the folding and unfolding actions of the four-bar linkage assembly, the third connecting rod comprises a flat mounting section and an inclined connecting section arranged at an angle with the flat mounting section, the second end of the first connecting rod and the second end of the second connecting rod are both rotationally connected to the inclined connecting section of the third connecting rod, and the oil cup is detachably connected to the flat mounting section of the third connecting rod.

[0014] In order to further ensure the stability and reliability of the four-bar linkage stretching and retracting actions, the first connecting rod has two left and right parallel rods, the first ends of the two first connecting rods are rotationally connected to the bottom of the casing by the same pin shaft extending in the left and right directions, the second connecting rod has two left and right parallel rods, and the second ends of the two second connecting rods are also rotationally connected to the bottom of the casing by the same pin shaft extending in the left and right directions.

[0015] The flat mounting section of the third connecting rod is a horizontally extending plate body, the inclined connecting section of the third connecting rod has two left and right parallel rods, when the oil cup is in the display state, the two inclined connecting sections are both curved and extended rearward and upward from the plate body, the second ends of the two first connecting rods are rotationally connected to the two inclined connecting sections of the third connecting rod by the same pin shaft extending in the left and right directions, and the second ends of the two second connecting rods are rotationally connected to the two inclined connecting sections of the third connecting rod by the same pin shaft extending in the left and right directions.

[0016] In order to facilitate the installation and disassembly of the oil cup, the top of the oil cup has front and rear extending inserts, the flat mounting section of the third connecting rod has front and rear extending slots, and the inserts of the oil cup are detachably installed in the slots.

[0017] In order to ensure the stability of the oil cup during the movement of the mechanism and facilitate the disassembly of the oil cup, the plug of the oil cup is movably arranged in the slot of the third connecting rod by a pressing type elastic self-locking mechanism, the pressing type elastic self-locking mechanism comprises a sliding piece, the sliding piece is provided with a locking portion, and during the process that the plug is pressed into or out of the slot by external force, the sliding piece can move between the locking position and the unlocking position which are spaced apart in the front and back directions of the third connecting rod.

[0018] When the sliding piece moves to the locking position, the locking portion of the sliding piece moves towards the locking position of the plug and forms a locking fit with the locking position to limit the plug from being pulled out of the slot.

[0019] When the sliding piece moves to the unlocking position, the locking portion of the sliding piece is away from the locking position of the plug to release the locking of the locking position and allow the plug to be pulled out of the slot.

[0020] As an improvement, the flat mounting section of the third connecting rod comprises an upper plate body and a lower plate body which is detachably connected to the bottom of the upper plate body, and the slot is defined between the upper plate body and the lower plate body.

[0021] In order to ensure the flexibility and reliability of the locking and locking action between the sliding piece and the plug during the forward and backward sliding of the sliding piece, the plug is provided with a bayonet as the locking position, the sliding piece comprises a sliding block body and an elastic supporting arm which is connected to the sliding block body and can swing to the side, the elastic supporting arm has a hook portion protruding to the side as the locking portion, the lower plate body is provided with a pressing inclined surface corresponding to the elastic supporting arm at a position, the pressing inclined surface can slide with the main body or the hook portion of the elastic supporting arm, when the sliding piece moves to the unlocking position, the hook portion of the elastic supporting arm is pulled out of the bayonet of the plug under the pressing of the pressing inclined surface, when the sliding piece moves to the locking position, the elastic supporting arm is reset to the initial position and the hook portion is inserted into the bayonet of the plug.

[0022] As an improvement, the elastic supporting arm extends forward from the sliding block body, the hook portion of the elastic supporting arm protrudes upward, the main body or the hook portion of the elastic supporting arm is provided with a protruding column extending to the left or to the right, and the pressing inclined surface on the lower plate body gradually inclines downward from back to front, and the protruding column is slide-fitted at the bottom of the pressing inclined surface. It is conceivable that the hook portion of the elastic supporting arm can also protrude downward, to the left or to the right, and the pressing inclined surface on the lower plate body can be designed to be inclined accordingly.

[0023] In order to simplify the structure of the pressing type elastic self-locking mechanism, the pressing type elastic self-locking mechanism comprises a pull rod and an elastic member in addition to the sliding piece, the sliding piece 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 to the lower plate body, the second end of the pull rod is provided with a limiting protrusion, during the forward and backward movement of the sliding piece relative to the lower plate body, the limiting protrusion is unidirectionally slidably constrained in the track groove, and the elastic member acts on the sliding piece and makes the sliding piece always have a tendency to move forward.

[0024] When the plug is loaded into the slot, the second end of the pull rod abuts against the stop portion of the sliding piece, so that the sliding piece is kept in the locked position state.

[0025] When the plug is unloaded from the slot, the second end of the pull rod is separated from the stop portion of the sliding piece, and the sliding piece is moved to the unlocked position under the action of the elastic member.

[0026] In order to realize the unidirectional movement of the limiting protrusion of the pull rod along the track groove, the track groove comprises a first guide section, a second guide section, a third guide section and a fourth guide section which are connected in sequence, the first guide section extends from back to front, the fourth guide section extends from front to back, the first guide section and the fourth guide section are further provided with a first limiting step at the joint position for blocking the limiting protrusion of the pull rod from returning from the first guide section to the fourth guide section, the second guide section extends from front to back, the first guide section and the second guide section are provided with a second limiting step at the joint position for blocking the limiting protrusion of the pull rod from returning from the second guide section to the first guide section, the third guide section extends from back to front, the joint position of the second guide section and the third guide section is arranged at an angle to define the stop portion, the second guide section and the third guide section are further provided with a third limiting step at the joint position for blocking the limiting protrusion of the pull rod from returning from the third guide section to the second guide section, and the joint position between the third guide section and the second guide section is provided with a fourth limiting step for blocking the limiting protrusion of the pull rod from returning from the fourth guide section to the third guide section.

[0027] In order to adapt to the shell of the range hood, better to receive oil, the oil cup is long strip, the bottom of the shell is provided with mounting frame on both sides, the four-bar linkage assembly is arranged in two groups, two groups of four-bar linkage assembly is arranged on two mounting frame, the drive motor is arranged on one of the mounting frame, the length direction of the oil cup is connected to the power output end of two four-bar linkage assembly, the power output end of two four-bar linkage assembly is connected through linkage rod. The power output end of two four-bar linkage assembly is connected through linkage rod, which can ensure the synchronization of the action of two four-bar linkage assembly, so that the moving process of the oil cup is more stable.

[0028] As an improvement, the linkage rod includes a bracket body extending left and right and connecting arms extending downward from both ends of the bracket body, the two connecting arms are connected to the power output ends of the two four-bar linkage assemblies, and the oil cup is accommodated in the range defined by the bracket body and the two connecting arms. The linkage rod adopts the above structure design, which not only ensures the synchronization of the movement of the two four-bar linkage mechanisms, but also plays a limiting and bearing role during the installation of the oil cup, ensuring the safety of the user during the installation and disassembly of the oil cup.

[0029] Compared with the prior art, the advantages of the present application are: when the oil amount in the oil cup needs to be checked, the oil cup can be presented to the front lower part of the shell by the movement mechanism, so that the oil amount in the oil cup can be clearly and intuitively observed, and the disassembly and installation of the oil cup are also facilitated. At the same time, when the oil amount in the oil cup does not need to be checked or the oil cup does not need to be disassembled, the oil cup is hidden in the bottom of the shell by the movement mechanism, which ensures the overall appearance of the range hood. In the preferred embodiment, the plug of the oil cup is movably arranged in the slot of the hanging bracket through the press-type elastic self-locking mechanism. When the user presses the oil cup, the sliding piece can be switched between the locked position and the unlocked position. When the sliding piece is in the locked position, the locking part of the sliding piece is locked with the locking position of the plug, so that the oil cup is locked and cannot be pulled out of the slot, ensuring the stability of the installation of the oil cup. When the sliding piece is in the unlocked position, the locking part of the sliding piece is away from the locking position of the plug, so that the locking of the locking position is released, and the plug can be easily and labor-savingly pulled out of the slot, so that the oil spill caused by excessive force when taking out the oil cup is avoided, and the user experience is improved. Under the action of the elastic element of the press-type elastic self-locking mechanism, the sliding piece moves forward, and the plug of the oil cup also moves forward by a part, which is convenient for the user to take the oil cup. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the range hood of the embodiment of the present application.

[0031] Figure 2Figure 6 is a left view of the range hood of the embodiment of the present application (the oil cup is in the collapsed state);

[0032] Figure 3 Figure 7 is a left view of the range hood of the embodiment of the present application (the oil cup is in the display state);

[0033] Figure 4 Figure 8 is a left view of the range hood of the embodiment of the present application (the oil cup is in the removed state);

[0034] Figure 5 Figure 9 is a perspective view of the range hood of the embodiment of the present application (the oil cup is omitted);

[0035] Figure 6 Figure 10 is a perspective view of the movement mechanism of the oil cup of the embodiment of the present application;

[0036] Figure 7 Figure 11 is an exploded view of the left four-bar linkage assembly of the movement mechanism of the oil cup of the embodiment of the present application;

[0037] Figure 8 Figure 12 is a perspective view of the sliding member of the embodiment of the present application;

[0038] Figure 9 Figure 13 is a perspective view of the lower plate body of the embodiment of the present application;

[0039] Figure 10 Figure 14 is a perspective view of the oil cup of the embodiment of the present application. DETAILED DESCRIPTION

[0040] The present application will be further described below in conjunction with the embodiments of the drawings.

[0041] In the specification and claims of the present application, directional terms are used, such as "front", "back", "up", "down", "left", "right", "side", "top", "bottom", etc., to describe various example structural parts and elements of the present application. These directional terms are used herein only for the purpose of convenience 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 directional terms should not be considered as limiting, such as "up" and "down" are not necessarily limited to the direction opposite or consistent with the direction of gravity.

[0042] Figures 1-10A preferred embodiment of the present application is shown. The range hood comprises a housing 10 and a centrifugal fan arranged in the housing 10. The housing 10 generally comprises a fan frame 11 and a hood 12 arranged at the bottom of the fan frame 11. The inner cavity of the fan frame 11 is in communication with the inner cavity of the hood 12. The front side wall of the hood 12 is provided with an air inlet. External smoke can enter the hood 12 through the air inlet. The centrifugal fan is arranged in the fan frame 11. The centrifugal fan generates negative pressure when it operates. External oil fume can be sucked into the hood 12 through the air inlet. The air inlet of the hood 12 is further provided with an oil screen for filtering oil fume. The bottom of the hood 12 is provided with an oil cup 15. The oil cup 15 is a long strip extending left and right, and is used to receive oil stains flowing down from the hood 12. The front part of the hood 12 is further provided with a smoke baffle 14 which can deflect forward and backward relative to the hood 12. The smoke baffle 14 is connected to the main body of the hood 12 by a hinge movement mechanism. Specifically, the smoke baffle 14 can deflect forward to open the air inlet and deflect backward to block the air inlet. The hinge movement mechanism for driving the smoke baffle 14 to deflect can adopt a conventional hinge movement mechanism in the prior art, which will not be described here.

[0043] The top of the oil cup 15 is open and is arranged on the bottom of the housing 10 in a detachable manner. The bottom of the housing 10 is provided with a movement mechanism. The oil cup 15 can be driven by the movement mechanism to have a folding state of being folded on the bottom of the housing 10 and a display state of being moved to the front and below of the housing 10. Specifically, the bottom of the housing 10 is provided with mounting frames 23 on both left and right sides. Each mounting frame 23 is provided with a four-bar linkage assembly 3 which can extend and retract. The left and right two ends of the oil cup 15 are connected to the two four-bar linkage assemblies 3 correspondingly. The bottom of the housing 10 is further provided with a driving motor 30 which is fixed relative to the housing 10. The output shaft of the driving motor 30 is connected to one of the four-bar linkage assemblies 3. The two four-bar linkage assemblies 3 are connected by a left and right extending linkage rod 24 to ensure that the two four-bar linkage assemblies 3 operate synchronously.

[0044] The four-bar linkage assembly 3 comprises a first link 31, a second link 32 and a third link 33. The first end of the first link 31 and the first end of the second link 32 are both rotationally connected to the bottom of the casing 10, the second end of the first link 31 and the second end of the second link 32 are both rotationally connected to the third link 33, the output shaft of the driving motor 30 is in transmission connection with the first end of the first link 31 or the first end of the second link 32, so as to drive the corresponding first link 31 or the second link 32 to swing back and forth. The oil cup 15 is detachably connected to the third link 33. The third link 33 has a slot 200 opened in the front-rear direction. Correspondingly, the top edge of the left and right sides of the oil cup 15 has a tab 151 folded towards the middle position of the oil cup 15, the two tabs 151 can be inserted into the two slots 200 from front to back, realizing the installation of the oil cup 15, and can be detached from the slots 200 to the front to realize the disassembly of the oil cup 15. The side openings of the slots 200 on the two third links 33 are opposite, that is, the side openings of the slots 200 on the left third link 33 are to the left, and the side openings of the slots 200 on the right third link 33 are to the right.

[0045] The first link 31 has two left and right parallel arrangements, the first ends of the two first links 31 are rotationally connected to the bottom of the casing 10 through the same pin shaft extending in the left-right direction. The second link 32 has two left and right parallel arrangements, the second ends of the two second links 32 are also rotationally connected to the bottom of the casing 10 through the same pin shaft extending in the left-right direction. The flat mounting section 332 of the third link 33 is a horizontally extending plate body, the inclined connecting section 331 of the third link 33 has two left and right parallel arrangements, when the oil cup 15 is in the display state, the two inclined connecting sections 331 are curved and extended upward from the plate body, the second ends of the two first links 31 are rotationally connected to the two inclined connecting sections 331 of the third link 33 through the same pin shaft extending in the left-right direction, and the second ends of the two second links 32 are rotationally connected to the two inclined connecting sections 331 of the third link 33 through the same pin shaft extending in the left-right direction. The above-mentioned two first links 31 can be designed as one body, and the two second links 32 can also be designed as one body. The double-link structure arranged in parallel can further ensure the stability and reliability of the four-bar linkage stretching and retracting action. When the oil cup 15 is in the folded state, the four-bar linkage assembly 3 is in the folded state, and when the oil cup 15 is in the display state, the four-bar linkage assembly 3 is in the state of stretching forward and downward.

[0046] The third connecting rod 33 comprises a flat mounting segment 332 and an inclined connecting segment 331 arranged at an angle with the flat mounting segment 332, and the second end of the first connecting rod 31 and the second end of the second connecting rod 32 are both rotationally connected to the inclined connecting segment 331 of the third connecting rod 33. The flat mounting segment 332 of the third connecting rod 33 is provided with a slot 200, and the insertion piece 151 of the oil cup 15 is detachably connected to the flat mounting segment 332 of the third connecting rod 33. The flat mounting segment 332 of the third connecting rod 33 is provided with a slot 200 extending frontward and rearward. In particular, the flat mounting segment 332 of the third connecting rod 33 comprises an upper plate body 22 and a lower plate body 21 detachably connected to the bottom of the upper plate body 22, and the slot 200 is defined between the upper plate body 22 and the lower plate body 21. The two inclined connecting segments 331 of the third connecting rod 33 are integrally designed with the upper plate body 22, and the bottom rear side of the upper plate body 22 is provided with a boss having a transversely extending mounting groove, and the rear side of the lower plate body 21 can be slid laterally into the mounting groove of the boss, and then fastened by screws.

[0047] The four-bar linkage assembly 3 of the present embodiment is designed to ensure that the oil cup 15 is always kept in a horizontal state in the folded state, the display state and the movement process, thereby avoiding the problem of tilting and spilling oil.

[0048] The linkage rod 24 of the present embodiment comprises a bracket main body extending leftward and rightward, and two connecting arms 241 extending downward from both ends of the bracket main body, and the two connecting arms 241 are respectively connected to the power output ends of the two four-bar linkage assemblies 3. The oil cup 15 is accommodated within the range defined by the bracket main body and the two connecting arms 241. The linkage rod 24 is designed as described above, which not only ensures the synchronization of the movement of the two four-bar linkage assemblies, but also functions as a limiting and bearing device during the installation of the oil cup 15, thereby ensuring the safety of the user during the installation and disassembly of the oil cup 15.

[0049] The bottom wall of the slot 200 (i.e. the top of the lower plate body 21) is further provided with a wave-shaped limiting protrusion 201 protruding inwardly into the slot 200, which extends along the left-right direction and has an arc-shaped structure gradually protruding upwardly from the front and rear sides to the middle portion in the vertical cross section (i.e. the cross section cut along the front-rear direction). After the insertion piece 151 of the oil cup 15 is inserted into the slot 200, the limiting protrusion 201 abuts against the bottom wall of the insertion piece 151, so as to ensure the firmness of the insertion and installation of the insertion piece 151 of the oil cup 15 and avoid the problem of shaking or easily coming out of the slot 200. The wave-shaped limiting protrusion 201 can make the insertion piece 151 of the oil cup 15 be clamped more tightly, and also reduce the friction, so that the oil cup 15 is easier to push and pull.

[0050] In the preferred embodiment, the tab 151 of the oil cup 15 is movably arranged in the slot 200 of the third link 33 by a press-type elastic self-locking mechanism, that is, the user can lock the tab 151 by pressing the side of the oil cup 15, and can unlock the tab 151 and pop the oil cup 15 forward by pressing the side of the oil cup 15 again.

[0051] Referring to Figures 7-10 , the press-type elastic self-locking mechanism comprises a sliding piece 40, a pull rod 43 and an elastic piece 44.

[0052] During the process of pressing the tab 151 into or out of the slot 200 by external force, the sliding piece 40 can move between the locked position and the unlocked position at a certain distance in the front and back direction relative to the third link 33. The sliding piece 40 has a locking portion 421, and the tab 151 of the oil cup 15 has a locking position 1510. When the sliding piece 40 moves to the locked position, the locking portion 421 of the sliding piece 40 moves towards the locking position 1510 of the tab 151 and forms a locking fit with the locking position 1510 to limit the tab 151 from being pulled out of the slot 200; when the sliding piece 40 moves to the unlocked position, the locking portion 421 of the sliding piece 40 moves away from the locking position 1510 of the tab 151 to release the locking of the locking position 1510 and allow the tab 151 to be pulled out of the slot 200.

[0053] The sliding piece 40 comprises a sliding block body 41 and an elastic support arm 42 connected to the sliding block body 41 and capable of swinging to the side, and the elastic support arm 42 has a hook portion protruding to the side as the locking portion 421, and the tab 151 has a bayonet as the locking position 1510, which is a closed hole or a semi-closed opening.

[0054] The sliding piece 40 is provided with a front and back extending limiting rib 211 on one of the hangers, and a front and back extending limiting groove 400 on the other, specifically referring to Figure 8 and Figure 9 , the lower plate body 21 has a limiting rib 211 protruding upward, and the bottom of the sliding block body 41 has a limiting groove 400 recessed upward, and the limiting rib 211 is slidingly arranged in the limiting groove 400, thereby ensuring the smooth sliding of the sliding piece 40 relative to the hanger.

[0055] Continuing to refer to Figure 8The upper portion of the slider body 41 is provided with a track groove 410 in the shape of a ring, the front portion of the track groove 410 has a portion recessed from both sides to the middle as a stop portion 419. The first end of the pull rod 43 is swingably connected to the lower plate body 21, the second end of the pull rod 43 is provided with a limiting protrusion 431, specifically, both ends of the pull rod 43 are provided with downwardly bent hooks, the hook at the first end is arranged in the insertion hole 213 of the lower plate body 21, and the hook at the second end is constrained in the track groove 410, wherein, during the forward and backward movement of the slider 40 relative to the lower plate body 21, the second end of the pull rod 43 can slide in one direction along the track groove 410. More specifically, the track groove 410 comprises a first guide segment 411, a second guide segment 412, a third guide segment 413 and a fourth guide segment 414 connected in sequence. The first guide segment 411 extends from back to front, the fourth guide segment 414 extends from front to back, and the first guide segment 411 and the fourth guide segment 414 further have a first limiting step 415 at the joint position for blocking the limiting protrusion 431 of the pull rod from returning from the first guide segment 411 to the fourth guide segment 414. The second guide segment 412 extends from front to back, and the first guide segment 411 and the second guide segment 412 have a second limiting step 416 at the joint position for blocking the limiting protrusion 431 of the pull rod from returning from the second guide segment 412 to the first guide segment 411. The third guide segment 413 extends from back to front, and the joint position of the second guide segment 412 and the third guide segment 413 is arranged at an angle to define the above-mentioned stop portion 419. The second guide segment 412 and the third guide segment 413 further have a third limiting step 417 at the joint position for blocking the limiting protrusion 431 of the pull rod from returning from the third guide segment 413 to the second guide segment 412. The joint position between the third guide segment 413 and the second guide segment 412 has a fourth limiting step 418 for blocking the limiting protrusion 431 of the pull rod from returning from the fourth guide segment 414 to the third guide segment 413. The bottom surface of the first guide segment 411 of the track groove 410 gradually rises towards the second guide segment 412, the bottom surface of the second guide segment 412 of the track groove 410 gradually rises towards the third guide segment 413, the bottom surface of the third guide segment 413 of the track groove 410 gradually rises towards the fourth guide segment 414, and the bottom surface of the fourth guide segment 414 of the track groove 410 gradually rises towards the first guide segment 411.

[0056] The elastic member 44 is a tension spring, the first end of the tension spring is connected to the lower plate body 21, and the second end is connected to the slider 40. Specifically, the tension spring is located on the front side of the slider body 41, the front portion of the slider body 41 is provided with a first connecting column 401 for hanging the first end of the tension spring, and the lower plate body 21 is provided with a second connecting column 212 for hanging the second end of the spring. Under the action of the elastic force of the tension spring, the slider 40 always has a tendency to move forward.

[0057] The lower plate body 21 is provided with a front and rear extending and upper and lower through limiting slide 214 at the position corresponding to the elastic support arm 42, and has a pressing inclined surface 210 corresponding to one side of the limiting slide 214, which can slide with the main body or hook of the elastic support arm 42. Specifically, the elastic support arm 42 extends forward from the sliding block body 41, the hook of the elastic support arm 42 protrudes upward, the main body or hook of the elastic support arm 42 has a protruding column 422 extending left or right, and the pressing inclined surface 210 of the lower plate body 21 gradually inclines downward from back to front, and the protruding column 422 is slide-fitted at the bottom of the pressing inclined surface 210.

[0058] During the process that the user presses the left side or the right side of the oil cup 15 and releases, the plug 151 of the oil cup 15 first drives the sliding piece 40 to move backward, and then moves a certain distance forward under the action of the elastic member 44, the second end of the pull rod 43 is unidirectionally moved to the stop portion 419 corresponding to the first guide segment 411 and the second guide segment 412 of the track groove 410, at this time, the sliding piece 40 is in the locked position state, and the protruding column 422 of the elastic support arm 42 of the sliding piece 40 also moves backward along the pressing inclined surface 210, wherein the elastic support arm 42 is reset upward to the initial position, the hook of the elastic support arm 42 is clamped into the socket of the plug 151, and the locking of the plug 151 of the oil cup 15 is realized. During the process that the user presses the left side or the right side of the oil cup 15 again and releases, the plug 151 of the oil cup 15 first drives the sliding piece 40 to move backward, and then moves forward under the action of the elastic member 44, the second end of the pull rod 43 is unidirectionally moved corresponding to the third guide segment 413 and the fourth guide segment 414 of the track groove 410, and the sliding piece 40 moves to the limit position, that is, in the unlocked position state, and during the process, the protruding column 422 of the elastic support arm 42 of the sliding piece 40 also moves forward along the pressing inclined surface 210, the elastic support arm 42 overcomes the elastic force to swing downward until the hook of the elastic support arm 42 is separated from the socket of the plug 151, the locking of the plug 151 of the oil cup 15 by the hook of the elastic support arm 42 is released, the plug of the oil cup 15 automatically pops out a distance forward, and the user can easily take the oil cup 15.

[0059] When it is necessary to check the oil level in the oil cup 15, the movement mechanism can move the oil cup 15 to the lower front of the housing 10, making the oil level inside the oil cup 15 clearly and intuitively visible, and also facilitating the disassembly and installation of the oil cup 15. Simultaneously, when it is not necessary to check the oil level in the oil cup 15 or disassemble the oil cup 15, the oil cup 15 is retracted by the movement mechanism and hidden at the bottom of the housing 10, ensuring the overall aesthetics of the range hood. Since the insert 151 of the oil cup 15 is movably mounted in the slot 200 of the bracket via a press-type elastic self-locking mechanism, when the oil cup 15 is in the display state, the user presses the oil cup 15, and the sliding member 40 can switch between the locked and unlocked positions. When the sliding member 40 is in the locked position, the locking part 421 of the sliding member 40 locks with the locking position 1510 of the insert 151, locking the oil cup 15 securely and preventing it from coming forward out of the slot 200, ensuring the reliable installation of the oil cup 15. When the slider 40 is in the unlocked position, the locking part 421 of the slider 40 moves away from the locking position 1510 of the insert 151, thus releasing the lock on the locking position 1510. The insert 151 can then be easily and effortlessly removed from the slot 200, preventing oil spillage due to excessive force when removing the oil cup 15, thus improving the user experience. Under the action of the elastic element 44 of the press-type elastic self-locking mechanism, the slider 40 moves forward, and the insert 151 of the oil cup 15 also moves forward a portion, making it easier for the user to pick up the oil cup 15. At the same time, since the linkage rod 24 is supported at the bottom, there is no risk of the oil cup 15 falling in the unlocked state. The user only needs to gently pull the oil cup 15 forward to a suitable position, where the user's hands can grip the oil cup 15 without interference from the linkage rod 24. At this point, the user can easily remove the oil cup 15 by holding both sides of the oil cup 15. Figure 4 The image shows the oil cup 15 separated from the casing 10. After the user checks the oil level or reassembles the oil cup 15, the drive motor 30 rotates in the opposite direction, causing the oil cup 15 to move backward and upward via the four-bar linkage 3, retracting and hiding at the bottom of the casing 10. Specifically, the four-bar linkage can only move when the range hood is not operating and the baffle 14 is closed. This firstly avoids the risk of oil dripping from the smoke collection chamber onto the stovetop when the range hood is operating; secondly, with the baffle 14 closed, the user has the best view to observe the oil level in the oil cup 15, avoiding the risk of misjudgment caused by the open baffle 14 obstructing the view.

[0060] The opening and closing action of the motion mechanism of the oil cup 15 in this embodiment can be achieved by the function buttons on the touch panel on the housing 10, or by gesture recognition such as hand gesture sensing.

Claims

1. A range hood comprising: a casing (10); an oil cup (15) arranged at the bottom of the casing (10); characterized in that it further comprises a moving mechanism arranged at the bottom of the casing (10), the oil cup (15) being connected to the moving mechanism and being capable of being driven by the moving mechanism to have a retracted state of being retracted at the bottom of the casing (10) and a display state of being moved to the front lower side of the casing (10); the moving mechanism comprising a driving motor (30) and a four-link assembly (3), the output shaft of the driving motor (30) being in driving connection with the power input end of the four-link assembly (3), and the oil cup (15) being detachably connected to the power output end of the four-link assembly (3); when the oil cup (15) is in the retracted state, the four-link assembly (3) is in a folded state, and when the oil cup (15) is in the display state, the four-link assembly (3) is in an unfolded state extending forward and downward; the four-link assembly (3) comprising a first link (31), a second link (32) and a third link (33), the first end of the first link (31) and the first end of the second link (32) being rotatably connected to the bottom of the casing (10), the second end of the first link (31) and the second end of the second link (32) being rotatably connected to the third link (33), the output shaft of the driving motor (30) being in driving connection with the first end of the first link (31) or the first end of the second link (32) so as to drive the corresponding first link (31) or second link (32) to swing forward and backward, and the oil cup (15) being detachably connected to the third link (33); the third link (33) comprising a flat mounting section (332) and an inclined connecting section (331) arranged at an angle with the flat mounting section (332), the second end of the first link (31) and the second end of the second link (32) being rotatably connected to the inclined connecting section (331) of the third link (33), and the oil cup (15) being detachably connected to the flat mounting section (332) of the third link (33); the first link (31) having two left and right parallel links, the first ends of the two first links (31) being rotatably connected to the bottom of the casing (10) by means of the same pin shaft extending in the left-right direction, and the second link (32) also having two left and right parallel links, the second ends of the two second links (32) being rotatably connected to the bottom of the casing (10) by means of the same pin shaft extending in the left-right direction. The flat mounting section (332) of the third connecting rod (33) is a horizontally extending plate body, the two left and right parallel arranged inclined connecting sections (331) of the third connecting rod (33) are both curved and extended upward and backward from the plate body when the oil cup (15) is in the display state, the second ends of the two first connecting rods (31) are rotatably connected to the two inclined connecting sections (331) of the third connecting rod (33) through the same pin shaft extending in the left and right directions, and the second ends of the two second connecting rods (32) are rotatably connected to the two inclined connecting sections (331) of the third connecting rod (33) through the same pin shaft extending in the left and right directions.

2. The hood according to claim 1, characterized in that: The top of the oil cup (15) is provided with a front and rear extending insertion piece (151), the flat mounting section (332) of the third connecting rod (33) is provided with a front and rear extending insertion slot (200), and the insertion piece (151) of the oil cup (15) is detachably mounted in the insertion slot (200).

3. The hood according to claim 2, characterized in that: The insertion piece (151) of the oil cup (15) is movably arranged in the insertion slot (200) of the third connecting rod (33) through a press type elastic self-locking mechanism, the press type elastic self-locking mechanism comprises a sliding piece (40), the sliding piece (40) is provided with a locking portion (421), and the sliding piece (40) can move between a locking position and an unlocking position at a certain distance apart in the front and rear directions relative to the third connecting rod (33) during the process that the insertion piece (151) is pressed and mounted or withdrawn from the insertion slot (200) by external force; When the sliding piece (40) moves to the locking position state, the locking portion (421) of the sliding piece (40) moves towards the locking position (1510) of the insertion piece (151) and forms a locking fit with the locking position (1510) to limit the withdrawal of the insertion piece (151) from the insertion slot (200); When the sliding piece (40) moves to the unlocking position state, the locking portion (421) of the sliding piece (40) is away from the locking position (1510) of the insertion piece (151) and releases the locking of the locking position (1510) to allow the withdrawal of the insertion piece (151) from the insertion slot (200).

4. The hood according to claim 3, characterized in that: The flat mounting section (332) of the third connecting rod (33) comprises an upper plate body (22) and a lower plate body (21) which is detachably connected to the bottom of the upper plate body (22), and the insertion slot (200) is defined between the upper plate body (22) and the lower plate body (21).

5. The hood according to claim 4, characterized in that: The insert piece (151) has a notch as the locking position (1510), the sliding member (40) comprises a sliding block body (41) and an elastic supporting arm (42) connected to the sliding block body (41) and capable of swinging to the side, the elastic supporting arm (42) has a hook portion protruding to the side as the locking portion (421), the lower plate body (21) is provided with a pressing inclined surface (210) capable of slidingly matching the main body or the hook portion of the elastic supporting arm (42) at a position corresponding to the elastic supporting arm (42), when the sliding member (40) moves to the unlocking position, the hook portion of the elastic supporting arm (42) is pressed by the pressing inclined surface (210) to disengage from the notch of the insert piece (151), when the sliding member (40) moves to the locking position, the elastic supporting arm (42) is reset to the initial position and the hook portion is engaged into the notch of the insert piece (151).

6. The hood according to claim 5, characterized in that: The elastic supporting arm (42) extends forward from the sliding block body (41), the hook portion of the elastic supporting arm (42) protrudes upward, the main body or the hook portion of the elastic supporting arm (42) has a protruding column (422) extending to the left or the right, and the pressing inclined surface (210) on the lower plate body (21) gradually inclines downward from back to front, and the protruding column (422) is slidingly matched at the bottom of the pressing inclined surface (210).

7. The hood according to claim 5, characterized in that: The pressing type elastic self-locking mechanism further comprises a pull rod (43) and an elastic member (44) besides the sliding member (40), the sliding block body (41) is provided with a track groove (410) in the shape of a ring, the track groove (410) has a stop portion (419), the first end of the pull rod (43) is swingably connected to the lower plate body (21), the second end of the pull rod (43) has a limiting protruding portion (431), during the forward and backward movement of the sliding member (40) relative to the lower plate body (21), the limiting protruding portion (431) is unidirectionally slidingly constrained in the track groove (410), and the elastic member (44) acts on the sliding member (40) and makes the sliding member (40) always have a tendency to move forward; When the insert piece (151) is loaded into the insertion groove (200), the second end of the pull rod (43) abuts against the stop portion (419) of the sliding member (40), so that the sliding member (40) is kept in the locking position; When the insert piece (151) is unloaded from the insertion groove (200), the second end of the pull rod (43) is disengaged from the stop portion (419) of the sliding member (40), and the sliding member (40) moves to the unlocking position under the action of the elastic member (44).

8. The hood according to claim 7, characterized in that: The track groove (410) comprises a first guide section (411), a second guide section (412), a third guide section (413) and a fourth guide section (414) connected in sequence and circularly, the first guide section (411) extends from back to front, the fourth guide section (414) extends from front to back, the first guide section (411) and the fourth guide section (414) have a first limiting step (415) for blocking the limiting protrusion (431) of the pull rod from returning from the first guide section (411) to the fourth guide section (414) at the joint position, the second guide section (412) extends from front to back, the first guide section (411) and the second guide section (412) have a second limiting step (416) for blocking the limiting protrusion (431) of the pull rod from returning from the second guide section (412) to the first guide section (411) at the joint position, the third guide section (413) extends from back to front, the joint position of the second guide section (412) and the third guide section (413) is arranged at an angle to define the stop portion (419), the second guide section (412) and the third guide section (413) have a third limiting step (417) for blocking the limiting protrusion (431) of the pull rod from returning from the third guide section (413) to the second guide section (412) at the joint position, and the joint position between the third guide section (413) and the second guide section (412) has a fourth limiting step (418) for blocking the limiting protrusion (431) of the pull rod from returning from the fourth guide section (414) to the third guide section (413).

9. The hood according to any one of claims 1-8, characterized in that: The oil cup (15) is in a strip shape, the bottom of the shell (10) is provided with mounting racks (23) on both sides, the four-bar linkage assemblies (3) are arranged in two groups and are spaced apart left and right, the two groups of four-bar linkage assemblies (3) are arranged on the two mounting racks (23), the driving motor (30) is arranged on one of the mounting racks (23), and the oil cup (15) is connected to the power output ends of the two groups of four-bar linkage assemblies (3) in the length direction.

10. The hood according to claim 9, characterized in that: The linkage rod (24) comprises a bracket main body extending left and right and connecting arms (241) extending downward from both ends of the bracket main body, the two connecting arms (241) are connected to the power output ends of the two four-bar linkage assemblies (3) respectively, and the oil cup (15) is accommodated in the range defined by the bracket main body and the two connecting arms (241).

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