Range hood

Abstract

The invention relates to a range hood. The range hood comprises a housing; the oil cup is arranged at the bottom of the machine shell; the oil cup further comprises a movement mechanism arranged at the bottom of the machine shell, and the oil cup is connected with the movement mechanism and can be driven by the movement mechanism to have a folded state of being folded at the bottom of the machine shell and a display state of being moved to the lower front portion of the machine shell. When the oil quantity in the oil cup needs to be checked, the oil cup can be driven by the movement mechanism to be delivered to the front lower part of the machine shell, so that the oil quantity in the oil cup can be clearly and intuitively observed, and the oil cup is also convenient to disassemble and assemble. Meanwhile, when the oil quantity in the oil cup does not need to be checked or the oil cup does not need to be dismounted, the oil cup is driven by the movement mechanism to be folded and hidden at the bottom of the machine shell, and the overall attractiveness of the range hood is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen appliances, and in particular to a range hood. Background Art

[0002] The range hood is a commonly used kitchen appliance. The range hood works based on the principle of fluid dynamics. The centrifugal fan installed inside the range hood generates negative pressure suction, sucking the oil smoke under the range hood into the centrifugal fan, which is then accelerated by the fan and discharged outdoors, thereby purifying the kitchen environment. In the process of the range hood discharging the oil smoke, most of the grease will be separated, so an oil collection cup is often installed at the bottom of the range hood to collect the separated grease.

[0003] Currently, there are several ways to check the amount of oil in the oil cup of a range hood, but all have their own shortcomings: One is to directly remove the oil cup for viewing, which is extremely inconvenient. The second is to set a transparent plastic area in the middle of the oil cup for users to view. Since the display effect is not obvious, users need to tilt their heads and necks to view it. Secondly, the transparent plastic in the middle is prone to yellowing and darkening after long-term contact with oil stains, affecting the user's judgment. The third method is to add a sensor to the oil cup to detect whether the oil level 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 smoke, which is not only easy to cause recognition errors, but also may be damaged over a long period of time. For example, the "An oil cup structure and a range hood using the oil cup structure" with application number 202222494762.4 discloses this.

[0004] Therefore, existing range hoods need further improvement. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a range hood which allows a user to clearly and intuitively check the amount of oil in the oil cup in view of the current state of the prior art.

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

[0007] chassis;

[0008] An oil cup, disposed at the bottom of the casing;

[0009] It also includes a motion mechanism arranged at the bottom of the housing, the oil cup is connected to the motion mechanism, and can be driven by the motion mechanism to have a folded state at the bottom of the housing and a display state moved to the front lower part of the housing.

[0010] As an improvement, the motion mechanism includes a drive motor and a four-bar linkage assembly, the output shaft of the drive motor is transmission-connected to the power input end of the four-bar linkage assembly, and the oil cup is detachably connected to the power output end of the four-bar linkage assembly.

[0011] As a further improvement, when the oil cup is in the retracted state, the four-bar linkage assembly is in a folded state, and when the oil cup is in the displayed state, the four-bar linkage assembly is in a state of extending forward and downward.

[0012] As an improvement, the four-link assembly includes a first link, a second link and a third link. The first end of the first link and the first end of the second link are both rotatably connected to the bottom of the casing, the second end of the first link and the second end of the second link are both rotatably connected to the third link, and the output shaft of the drive motor is transmission-connected to the first end of the first link or the first end of the second link, thereby driving the corresponding first link or second link to swing back and forth, and the oil cup is detachably connected to the third link.

[0013] In order to realize the folding and unfolding action of the four-link assembly, the third link includes a straight mounting section and an inclined connecting section arranged at an angle to the straight mounting section, the second end of the first link and the second end of the second link are both rotatably connected to the inclined connecting section of the third link, and the oil cup is detachably connected to the straight mounting section of the third link.

[0014] In order to further ensure the stability and reliability of the four-link telescopic action, the first connecting rods are provided in two parallel positions on the left and right sides, and the first ends of the two first connecting rods are rotatably connected to the bottom of the housing through the same pin shaft extending in the left and right directions, and the second connecting rods are provided in two parallel positions on the left and right sides, and the second ends of the two second connecting rods are also rotatably connected to the bottom of the housing through the same pin shaft extending in the left and right directions;

[0015] The straight mounting section of the third connecting rod is a horizontally extending plate body, and the third connecting rod has two inclined connecting sections arranged side by side on the left and right. When the oil cup is in the display state, the two inclined connecting sections are bent and extended backward and upward from the plate body, and the second ends of the two first connecting rods are rotatably connected to the two inclined connecting sections of the third connecting rod through the same pin shaft extending in the left and right directions, and the second ends of the two second connecting rods are rotatably connected to the two inclined connecting sections of the third connecting rod through the same pin shaft extending in the left and right directions.

[0016] In order to facilitate the installation and removal of the oil cup, the top of the oil cup has an insert extending forward and backward, and the straight installation section of the third connecting rod has a slot extending forward and backward. The insert of the oil cup is detachably installed in the slot.

[0017] In order to ensure the stability of the oil cup during the movement driven by the motion mechanism and to facilitate the removal of the oil cup, the plug of the oil cup is movably arranged in the slot of the third connecting rod through a press-type elastic self-locking mechanism. The press-type elastic self-locking mechanism includes a sliding member, and the sliding member has a locking portion. When the plug is pressed by an external force to be inserted into or withdrawn from the slot, the sliding member can move between a locked position and an unlocked position at a certain distance in the front-to-back direction relative to the third connecting rod;

[0018] When the sliding member moves to the locking position, the locking portion of the sliding member moves toward the locking position of the plug and forms a locking fit with the locking position to restrict the plug from coming out of the slot;

[0019] When the sliding member moves to the unlocking position, the locking portion of the sliding member moves away from the locking position of the plug-in piece, releasing the locking of the locking position and allowing the plug-in piece to escape from the slot.

[0020] As an improvement, the straight installation section of the third connecting rod includes an upper plate body and a lower plate body 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 member and the plug piece during the forward and backward sliding process, the plug piece is provided with a bayonet as the locking position. The sliding member includes a slider body and an elastic support arm connected to the slider body and capable of swinging toward the side. The elastic support arm has a hook protruding toward the side as the locking portion. A pressing inclined surface that can slidably cooperate with the main body or hook of the elastic support arm is provided on the lower plate body at a position corresponding to the elastic support arm. When the sliding member moves to the unlocking position, the elastic support arm is pressed by the pressing inclined surface so that its hook portion disengages from the bayonet of the plug piece. When the sliding member moves to the locking position, the elastic support arm is reset to the initial position and its hook portion is engaged with the bayonet of the plug piece.

[0022] As an improvement, the elastic support arm extends forward from the slider body, the hook portion of the elastic support arm protrudes upward, the main body or hook portion of the elastic support arm has a convex column extending to the left or right, the pressing inclined surface on the lower plate body gradually tilts downward from the back to the front, and the convex column slides and fits at the bottom of the pressing inclined surface. It is conceivable that the hook portion of the elastic support 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 push-type elastic self-locking mechanism, the push-type elastic self-locking mechanism includes a pull rod and an elastic member in addition to the sliding member. The slider body is provided with an annular track groove, and the track groove has a stopper. The first end of the pull rod is swingably connected to the lower plate body, and the second end of the pull rod has a limiting convex portion. During the forward and backward movement of the sliding member relative to the lower plate body, the limiting convex portion is unidirectionally slidably constrained in the track groove. The elastic member acts on the sliding member and makes the sliding member always have a tendency to move forward.

[0024] When the insert is inserted into the slot, the second end of the pull rod abuts against the stopper of the sliding member, so that the sliding member is kept in the locked position;

[0025] When the insert piece is withdrawn from the slot, the second end of the pull rod is disengaged from the stop portion of the sliding member, and the sliding member moves to the unlocking 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 includes a first guide section, a second guide section, a third guide section and a fourth guide section which are connected in a circular manner in sequence, the first guide section extends from rear to front, the fourth guide section extends from front to rear, the first guide section and the fourth guide section also have a limiting protrusion for blocking the limiting rod from returning from the first guide section to the first limiting step in the fourth guide section at the joint position, the second guide section extends from front to rear, the first guide section and the second guide section have a limiting protrusion for blocking the limiting rod at the joint position Returning from the second guide section to the second limiting step in the first guide section, the third guide section extends from back to front, the engaging 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 also have a limiting protrusion at the engaging position for blocking the limiting rod from returning from the third guide section to the third limiting step in the second guide section, and the engaging position between the third guide section and the second guide section has a limiting protrusion for blocking the limiting rod from returning from the fourth guide section to the fourth limiting step in the third guide section.

[0027] In order to match the housing of the range hood and better receive the oil, the oil cup is in the shape of a long strip, and mounting brackets are provided on both sides of the bottom of the housing. The four-bar linkage assembly has two groups arranged at intervals on the left and right, and the two groups of four-bar linkage assemblies are correspondingly arranged on the two mounting brackets. The drive motor is arranged on one of the mounting brackets. The two ends of the oil cup in the length direction are respectively connected to the power output ends of the two groups of four-bar linkage assemblies, and the power output ends of the two four-bar linkage assemblies are also connected by a linkage rod. The power output ends of the two four-bar linkage assemblies are connected by a linkage rod, which can ensure the synchronization of the actions of the left and right four-bar linkage assemblies, making the movement process of the oil cup smoother.

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

[0029] Compared with the prior art, the advantages of the present invention are as follows: when it is necessary to check the amount of oil in the oil cup, the oil cup can be driven by the motion mechanism to be presented to the front lower part of the casing, so that the amount of oil inside the oil cup can be clearly and intuitively observed, and the removal and installation of the oil cup is also convenient. At the same time, when it is not necessary to check the amount of oil in the oil cup or to disassemble and assemble the oil cup, the oil cup is folded and hidden at the bottom of the casing by the motion mechanism, thereby ensuring the overall aesthetics of the range hood. In the preferred embodiment, the insert of the oil cup is movably arranged in the slot of the bracket through a push-type elastic self-locking mechanism. When the user presses the oil cup, the sliding piece can switch between the locked position and the unlocked position. When the sliding piece is in the locked position, the locking portion of the sliding piece is locked with the locking position of the insert piece, locking the oil cup so that it will not fall out forward from the slot, thereby ensuring the reliability of the installation of the oil cup. When the sliding member is in the unlocked position, the locking portion of the sliding member is away from the locking position of the insert, and the lock on the locking position is released, and the insert can be easily and labor-savingly removed from the slot, and oil stains will not be spilled due to excessive force when removing the oil cup, which improves the user's usage experience. Under the action of the elastic member of the push-type elastic self-locking mechanism, the sliding member moves forward, and the insert of the oil cup also moves forward a part, which is convenient for the user to take the oil cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of a range hood according to an embodiment of the present invention;

[0031] Figure 2It is a left side view of the range hood according to the embodiment of the present invention (the oil cup is in a folded state);

[0032] Figure 3 It is a left side view of the range hood according to the embodiment of the present invention (the oil cup is in the display state);

[0033] Figure 4 It is a left side view of the range hood according to the embodiment of the present invention (the oil cup is removed);

[0034] Figure 5 Schematic diagram of the three-dimensional structure of the range hood according to the embodiment of the present invention (the oil cup is omitted);

[0035] Figure 6 It is a three-dimensional structural schematic diagram of the motion mechanism of the oil cup according to an embodiment of the present invention;

[0036] Figure 7 An exploded view of the left four-bar linkage assembly of the motion mechanism of the oil cup according to an embodiment of the present invention;

[0037] Figure 8 is a schematic diagram of the three-dimensional structure of a sliding member according to an embodiment of the present invention;

[0038] Fig. 9 It is a schematic diagram of the three-dimensional structure of the lower plate body of an embodiment of the present invention;

[0039] Fig.10 It is a schematic diagram of the three-dimensional structure of the oil cup according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below with reference to the accompanying drawings.

[0041] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0042] Figure 1-Figure 10A preferred embodiment of the range hood of the present invention is shown. The range hood includes a casing 10 and a centrifugal fan arranged in the casing 10. The casing 10 generally includes a fan frame 11 and a fume hood 12 arranged at the bottom of the fan frame 11. The inner cavity of the fan frame 11 is connected to the inner cavity of the fume hood 12. An air inlet is provided on the front side wall of the fume hood 12, and external smoke can enter the fume hood 12 through the air inlet. The centrifugal fan is arranged in the fan frame 11. When the centrifugal fan is running, negative pressure is generated, and external oil smoke can be sucked into the fume hood 12 through the air inlet. An oil net is also provided at the air inlet of the fume hood 12 for filtering oil smoke. An oil cup 15 is provided at the bottom of the fume hood 12. The oil cup 15 is in the shape of a long strip extending left and right, and is used to receive oil stains flowing down from the fume hood 12. The front part of the smoke hood 12 is also provided with a smoke shield 14 that can be deflected forward and backward relative to the smoke hood 12. The smoke shield 14 is connected to the main body of the smoke hood 12 through a hinge motion mechanism, and can be deflected forward to open the above-mentioned air inlet and deflected backward to block and close the above-mentioned air inlet. The hinge motion mechanism used to drive the smoke shield 14 to deflect can adopt a conventional hinge motion mechanism in the prior art, which will not be described in detail here.

[0043] The top of the oil cup 15 is open and is detachably arranged at the bottom of the housing 10. A motion mechanism is provided at the bottom of the housing 10, and the oil cup 15 can be driven by the motion mechanism to have a folded state at the bottom of the housing 10 and a display state at the front lower part of the housing 10. Specifically, mounting frames 23 are provided on both the left and right sides of the bottom of the housing 10, and each mounting frame 23 is provided with a telescopic four-bar assembly 3, and the left and right ends of the oil cup 15 are correspondingly connected to the two four-bar assemblies 3. A driving motor 30 is also provided at the bottom of the housing 10, and the driving motor 30 is fixed relative to the housing 10. The output shaft of the driving motor 30 is connected to one of the four-bar assemblies 3, and the two four-bar assemblies 3 are connected by a linkage rod 24 extending left and right to ensure that the two four-bar assemblies 3 move synchronously.

[0044] The four-link assembly 3 includes 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 rotatably connected to the bottom of the housing 10, and the second end of the first link 31 and the second end of the second link 32 are both rotatably connected to the third link 33. The output shaft of the driving motor 30 is connected to the first end of the first link 31 or the first end of the second link 32, thereby driving the corresponding first link 31 or the second link 32 to swing forward and backward. The oil cup 15 is detachably connected to the third link 33. Both third links 33 have slots 200 opened in the front-to-back direction. Correspondingly, the top edges of the left and right sides of the oil cup 15 have inserts 151 folded toward the middle position of the oil cup 15. The two inserts 151 can be inserted into the two slots 200 from front to back to achieve the installation of the oil cup 15, and can be removed from the slots 200 to achieve the removal of the oil cup 15. To match the two inserts 151 of the oil cup 15 , the side openings of the slots 200 on the two third connecting rods 33 face opposite directions, that is, the side opening of the slot 200 on the left third connecting rod 33 faces left, and the side opening of the slot 200 on the right third connecting rod 33 faces right.

[0045] There are two first connecting rods 31 arranged side by side on the left and right sides, and the first ends of the two first connecting rods 31 are rotatably connected to the bottom of the housing 10 through the same pin extending in the left and right directions. There are two second connecting rods 32 arranged side by side on the left and right sides, and the second ends of the two second connecting rods 32 are also rotatably connected to the bottom of the housing 10 through the same pin extending in the left and right directions. The straight installation section 332 of the third connecting rod 33 is a horizontally extending plate body, and there are two inclined connecting sections 331 of the third connecting rod 33 arranged side by side on the left and right sides. When the oil cup 15 is in the display state, the two inclined connecting sections 331 are bent and extended from the plate body to the rear and upward, and 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 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 extending in the left and right directions. The above-mentioned two first connecting rods 31 can be designed as an integral body, and the two second connecting rods 32 can also be designed as an integral body. The use of a double-link structure arranged side by side can further ensure the stability and reliability of the four-link telescopic action. When the oil cup 15 is in the folded state, the four-link assembly 3 is in the folded state, and when the oil cup 15 is in the displayed state, the four-link assembly 3 is in the state of extending forward and downward.

[0046] The third connecting rod 33 includes a straight mounting section 332 and an inclined connecting section 331 arranged at an angle to the straight mounting section 332. The second end of the first connecting rod 31 and the second end of the second connecting rod 32 are both rotatably connected to the inclined connecting section 331 of the third connecting rod 33. The straight mounting section 332 of the third connecting rod 33 has a slot 200. The insert 151 of the oil cup 15 is detachably connected to the straight mounting section 332 of the third connecting rod 33. The straight mounting section 332 of the third connecting rod 33 has a slot 200 extending forward and backward. More specifically, the straight mounting section 332 of the third connecting rod 33 includes an upper plate body 22 and a lower plate body 21 detachably connected to the bottom of the upper plate body 22. The above-mentioned slot 200 is defined between the upper plate body 22 and the lower plate body 21. Among them, the two inclined connecting sections 331 of the third connecting rod 33 are designed as an integral unit with the upper plate body 22, and the bottom rear side of the upper plate body 22 has a boss with a laterally extending mounting groove. The rear side edge of the lower plate body 21 can slide laterally into the mounting groove of the boss and then be fastened by screws.

[0047] The structural design of the four-link assembly 3 of this embodiment can ensure that the oil cup 15 always remains in a horizontal state in the folded state, the displayed state and during the movement, thereby avoiding the problem of tilting and overflowing oil.

[0048] The linkage rod 24 of this embodiment includes a bracket body extending left and right and connecting arms 241 extending downward from the two ends of the bracket 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 stored in the range defined by the bracket body and the two connecting arms 241. The linkage rod 24 adopts the above structural design, which not only ensures the synchronization of the movement of the four-bar linkage mechanism on both sides, but also, the linkage rod 24 of the above structure can also play the role of limiting and bearing during the installation of the oil cup 15, ensuring the safety of the user during the installation and removal of the oil cup 15.

[0049] The bottom wall of the slot 200 (i.e., the top of the lower plate 21) also has a wave-shaped limiting protrusion 201 protruding toward the slot 200. The limiting protrusion 201 extends in the left-right direction, and its cross section (vertical section cut in the front-back direction) is an arc-shaped structure that gradually protrudes upward from the front and back sides to the middle. After the plug 151 of the oil cup 15 is inserted into the slot 200, the limiting protrusion 201 abuts against the bottom wall of the plug 151 to ensure the reliability of the plug 151 of the oil cup 15 to prevent shaking or easy detachment from the slot 200. The setting of the wave-shaped limiting protrusion 201 can make the plug 151 of the oil cup 15 more tightly stuck, while also reducing friction, making the push and pull of the oil cup 15 more labor-saving.

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

[0051] See also Figure 7-Figure 10 The push-type elastic self-locking mechanism includes a sliding member 40 , a pull rod 43 and an elastic member 44 .

[0052] When the insert 151 is pressed by external force to be inserted into or removed from the slot 200, the sliding member 40 can move between a locked position and an unlocked position at a certain distance in the front-to-back direction relative to the third connecting rod 33. The sliding member 40 has a locking portion 421, and the insert 151 of the oil cup 15 has a locking position 1510. When the sliding member 40 moves to the locked position, the locking portion 421 of the sliding member 40 moves toward the locking position 1510 of the insert 151 and forms a locking fit with the locking position 1510 to restrict the insert 151 from escaping from the slot 200; when the sliding member 40 moves to the unlocked position, the locking portion 421 of the sliding member 40 moves away from the locking position 1510 of the insert 151 to release the locking of the locking position 1510 and allow the insert 151 to escaping from the slot 200.

[0053] The sliding member 40 includes a slider body 41 and an elastic arm 42 connected to the slider body 41 and capable of swinging to the side. The elastic arm 42 has a hook portion protruding to the side as a locking portion 421. The insert 151 has a bayonet as a locking position 1510. The bayonet is a closed hole or a semi-closed opening.

[0054] One of the sliding member 40 and the hanging bracket is provided with a limiting rib 211 extending forward and backward, and the other is provided with a limiting groove 400 extending forward and backward. Figure 8 and Fig. 9 The lower plate 21 has a limiting rib 211 protruding upward, and the bottom of the slider body 41 has a limiting groove 400 recessed upward. The limiting rib 211 is slidably arranged in the limiting groove 400, thereby ensuring the smooth sliding of the sliding member 40 relative to the bracket.

[0055] Continue to see Figure 8, the upper part of the slider body 41 is provided with an annular track groove 410, and the front part of the track groove 410 has a portion that is recessed backward from both sides to the middle as a stopper 419. The first end of the pull rod 43 is swingably connected to the lower plate body 21, and the second end of the pull rod 43 has a limiting protrusion 431. Specifically, both ends of the pull rod 43 have a downwardly bent hook, and the hook at the first end is rotatably 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 sliding member 40 relative to the lower plate body 21, the second end of the pull rod 43 can slide unidirectionally along the track groove 410. More specifically, the track groove 410 includes a first guide section 411, a second guide section 412, a third guide section 413 and a fourth guide section 414 that are cyclically connected in sequence. The first guide section 411 extends from rear to front, and the fourth guide section 414 extends from front to rear. The first guide section 411 and the fourth guide section 414 are provided at the joint position with a first limiting step 415 for blocking the limiting rod from returning from the first guide section 411 to the fourth guide section 414. The second guide section 412 extends from front to rear, and the first guide section 411 and the second guide section 412 are provided at the joint position with a second limiting step 416 for blocking the limiting rod from returning from the second guide section 412 to the first guide section 411. The third guide section 413 extends from the back to the front, and the second guide section 412 and the third guide section 413 are arranged at an angle at the joint position to define the above-mentioned stopper 419. The second guide section 412 and the third guide section 413 also have a third limit step 417 in the joint position for blocking the limit rod from returning from the third guide section 413 to the second guide section 412. The joint position between the third guide section 413 and the second guide section 412 has a fourth limit step 418 in the joint position for blocking the limit rod from returning from the fourth guide section 414 to the third guide section 413. The bottom surface of the first guide section 411 of the track groove 410 gradually rises toward the second guide section 412, the bottom surface of the second guide section 412 of the track groove 410 gradually rises toward the third guide section 413, the bottom surface of the third guide section 413 of the track groove 410 gradually rises toward the fourth guide section 414, and the bottom surface of the fourth guide section 414 of the track groove 410 gradually rises toward the first guide section 411.

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

[0057] A limiting slideway 214 extending forward and backward and penetrating upward and downward is provided on the lower plate 21 at a position corresponding to the elastic support arm 42, and a side corresponding to the limiting slideway 214 is provided with a pressing inclined surface 210 that can be slidably matched with the main body or hook portion of the elastic support arm 42. Specifically, the elastic support arm 42 extends forward from the slider body 41, the hook portion of the elastic support arm 42 protrudes upward, and the main body or hook portion of the elastic support arm 42 is provided with a convex column 422 extending leftward or rightward, and the pressing inclined surface 210 of the lower plate 21 gradually tilts downward from the back to the front, and the convex column 422 is slidably matched at the bottom of the pressing inclined surface 210.

[0058] When the user presses the left or right side of the oil cup 15 and releases it, the insert 151 of the oil cup 15 first drives the sliding member 40 to move backward, and then moves forward a certain distance under the action of the elastic member 44, and the second end of the pull rod 43 corresponds to the first guide section 411 and the second guide section 412 along the track groove 410 and moves unidirectionally to the stop portion 419. At this time, the sliding member 40 is in a locked position. At the same time, the boss 422 of the elastic support arm 42 of the sliding member 40 also moves backward along the pressing slope 210, wherein the elastic support arm 42 is reset upward to the initial position, and the hook of the elastic support arm 42 is inserted into the bayonet of the insert 151 to achieve locking of the insert 151 of the oil cup 15. When the user presses the left or right side of the oil cup 15 again and releases it, the insert 151 of the oil cup 15 first drives the sliding member 40 to move backward, and then moves forward under the action of the elastic member 44, and the second end of the pull rod 43 disengages from the stopper 419, and then moves unidirectionally along the third guide section 413 and the fourth guide section 414 of the track groove 410. When the sliding member 40 moves forward to the limit position, it is in the unlocked position. At the same time, in this process, the boss 422 of the elastic support arm 42 of the sliding member 40 also moves forward along the pressing inclined surface 210, and the elastic support arm 42 overcomes its own elastic force and swings downward until the hook of the elastic support arm 42 disengages from the snap-in of the insert 151, thereby releasing the lock of the hook of the elastic support arm 42 on the insert 151 of the oil cup 15, and the spring piece of the oil cup 15 automatically pops forward a distance, making it convenient for the user to take the oil cup 15.

[0059] When it is necessary to check the amount of oil in the oil cup 15, the oil cup 15 can be driven by the motion mechanism to be presented to the front and lower part of the housing 10, so that the amount of oil in the oil cup 15 can be clearly and intuitively observed, and the removal and installation of the oil cup 15 are also convenient. At the same time, when it is not necessary to check the amount of oil in the oil cup 15 or to disassemble and install the oil cup 15, the oil cup 15 is driven by the motion mechanism to be folded 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 arranged in the slot 200 of the hanger through 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 position and the unlocked position. When the sliding member 40 is in the locked position, the locking portion 421 of the sliding member 40 is locked with the locking position 1510 of the insert 151, locking the oil cup 15 so that it will not fall out forward from the slot 200, ensuring the reliability of the installation of the oil cup 15. When the sliding member 40 is in the unlocked position, the locking portion 421 of the sliding member 40 is away from the locking position 1510 of the insert 151, and the lock on the locking position 1510 is released. The insert 151 can be easily and labor-savingly removed from the slot 200, and oil stains will not be spilled due to excessive force when taking out the oil cup 15, which provides a better user experience. Under the action of the elastic member 44 of the push-type elastic self-locking mechanism, the sliding member 40 moves forward, and the insert 151 of the oil cup 15 also moves forward a part, which is convenient for the user to take the oil cup 15. At the same time, since the linkage rod 24 is supported at the bottom, the oil cup 15 will not fall in the unlocked state. The user only needs to gently pull the oil cup 15 forward to a suitable position. This position is for the user to grab the oil cup 15 with both hands without interference from the linkage rod 24. At this time, the user holds both sides of the oil cup 15 with both hands, and the oil cup 15 can be easily removed. Figure 4 The oil cup 15 is shown as being separated from the housing 10. When the user has checked the oil level or assembled the oil cup 15, the drive motor 30 rotates in the opposite direction, and the oil cup 15 is driven to move backward and upward through the four-link assembly 3, and is retracted and hidden at the bottom of the housing 10. In particular, the four-link assembly can only move when the range hood is not working and the smoke baffle 14 is closed. Firstly, the risk of the oil cup 15 moving and causing the oil in the smoke collecting chamber to drip onto the stovetop can be avoided when the range hood is working; secondly, when the smoke baffle 14 is closed, the user can have the best view to observe the oil level in the oil cup 15, avoiding the risk of the open smoke baffle 14 affecting the user's view of the oil level in the oil cup 15 and causing misjudgment.

[0060] The opening and closing actions of the movement mechanism of the oil cup 15 of the present embodiment can be realized by function keys on the touch panel on the housing 10, or by gesture recognition such as waving sensing.

Claims

1. A range hood, comprising: Housing (10); An oil cup (15) is arranged at the bottom of the casing (10); The invention is characterized in that it also includes a moving mechanism arranged at the bottom of the casing (10), the oil cup (15) is connected to the moving mechanism, and can be driven by the moving mechanism to have a folded state at the bottom of the casing (10) and a display state moved to the front lower part of the casing (10).

2. The range hood according to claim 1, characterized in that: The motion mechanism comprises a drive motor (30) and a four-bar linkage assembly (3); the output shaft of the drive motor (30) is transmission-connected to the power input end of the four-bar linkage assembly (3); and the oil cup (15) is detachably connected to the power output end of the four-bar linkage assembly (3).

3. The range hood according to claim 2, characterized in that: When the oil cup (15) is in the folded state, the four-bar linkage assembly (3) is in a folded state, and when the oil cup (15) is in the displayed state, the four-bar linkage assembly (3) is in a state of extending forward and downward.

4. The range hood according to claim 3, characterized in that: The four-link 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 rotatably connected to the bottom of the housing (10); the second end of the first link (31) and the second end of the second link (32) are both rotatably connected to the third link (33); the output shaft of the drive motor (30) is transmission-connected to the first end of the first link (31) or the first end of the second link (32), thereby driving the corresponding first link (31) or the second link (32) to swing back and forth; and the oil cup (15) is detachably connected to the third link (33).

5. The range hood according to claim 4, characterized in that: The third connecting rod (33) comprises a straight mounting section (332) and an inclined connecting section (331) arranged at an angle to the straight mounting section (332); the second end of the first connecting rod (31) and the second end of the second connecting rod (32) are both rotatably connected to the inclined connecting section (331) of the third connecting rod (33); and the oil cup (15) is detachably connected to the straight mounting section (332) of the third connecting rod (33).

6. The range hood according to claim 5, characterized in that: There are two first connecting rods (31) arranged side by side on the left and right, and the first ends of the two first connecting rods (31) are rotatably connected to the bottom of the housing (10) through the same pin shaft extending in the left and right directions; there are two second connecting rods (32) arranged side by side on the left and right, and the second ends of the two second connecting rods (32) are also rotatably connected to the bottom of the housing (10) through the same pin shaft extending in the left and right directions; The straight mounting section (332) of the third connecting rod (33) is a horizontally extending plate body, and the third connecting rod (33) has two inclined connecting sections (331) arranged side by side on the left and right. When the oil cup (15) is in the display state, the two inclined connecting sections (331) are bent and extended from the plate body to the rear and upward, and 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.

7. The range hood according to claim 6, characterized in that: The top of the oil cup (15) is provided with an insert (151) extending forward and backward, the straight mounting section (332) of the third connecting rod (33) is provided with a slot (200) extending forward and backward, and the insert (151) of the oil cup (15) is detachably mounted in the slot (200).

8. The range hood according to claim 7, characterized in that: The inserting piece (151) of the oil cup (15) is movably arranged in the slot (200) of the third connecting rod (33) through a push-type elastic self-locking mechanism, the push-type elastic self-locking mechanism comprises a sliding member (40), the sliding member (40) has a locking portion (421), when the inserting piece (151) is pressed by an external force to be inserted into or withdrawn from the slot (200), the sliding member (40) can move between a locking position and an unlocking position at a certain distance in the front-rear direction relative to the third connecting rod (33); When the sliding member (40) moves to the locked position, the locking portion (421) of the sliding member (40) moves toward the locking position (1510) of the inserting piece (151) and forms a locking fit with the locking position (1510) to restrict the inserting piece (151) from coming out of the slot (200); When the sliding member (40) moves to the unlocking position, the locking portion (421) of the sliding member (40) moves away from the locking position (1510) of the inserting piece (151), unlocking the locking position (1510) and allowing the inserting piece (151) to escape from the slot (200).

9. The range hood according to claim 8, characterized in that: The straight installation section (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).

10. The range hood according to claim 9, characterized in that: The inserting piece (151) is provided with a bayonet as the locking position (1510); the sliding member (40) comprises a slider body (41) and an elastic support arm (42) connected to the slider body (41) and capable of swinging toward the side; the elastic support arm (42) has a hook portion protruding toward the side as the locking portion (421); a pressing inclined surface (210) capable of slidingly cooperating with the main body or the hook portion of the elastic support arm (42) is provided on the lower plate (21) at a position corresponding to the elastic support arm (42); when the sliding member (40) moves to the unlocking position, the elastic support arm (42) is pressed by the pressing inclined surface (210) so that its hook portion is separated from the bayonet of the inserting piece (151); when the sliding member (40) moves to the locking position, the elastic support arm (42) is reset to the initial position and its hook portion is snapped into the bayonet of the inserting piece (151).

11. The range hood according to claim 10, characterized in that: The elastic support arm (42) extends forward from the slider body (41), the hook portion of the elastic support arm (42) protrudes upward, the body or the hook portion of the elastic support arm (42) is provided with a convex column (422) extending leftward or rightward, the pressing inclined surface (210) on the lower plate body (21) gradually tilts downward from back to front, and the convex column (422) is slidably fitted at the bottom of the pressing inclined surface (210).

12. The range hood according to claim 10, characterized in that: In addition to the sliding member (40), the push-type elastic self-locking mechanism also includes a pull rod (43) and an elastic member (44); the slider body (41) is provided with an annular track groove (410), and the track groove (410) has a stopper (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 protrusion (431); when the sliding member (40) moves forward and backward relative to the lower plate body (21), the limiting protrusion (431) is unidirectionally slidably constrained in the track groove (410); 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 inserting piece (151) is inserted into the slot (200), the second end of the pull rod (43) abuts against the stopper (419) of the sliding member (40), thereby keeping the sliding member (40) in the locked position; When the insert (151) exits the slot (200), the second end of the pull rod (43) disengages 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).

13. The range hood according to claim 12, 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) which are cyclically connected in sequence. The first guide section (411) extends from rear to front, and the fourth guide section (414) extends from front to rear. The first guide section (411) and the fourth guide section (414) also have a first limiting step (415) in the joint position for blocking the limiting rod from returning from the first guide section (411) to the fourth guide section (414). The second guide section (412) extends from front to rear. The first guide section (411) and the second guide section (412) have a limiting step (415) in the joint position for blocking the limiting rod from returning from the second guide section (412) to the first guide section (414). A second limiting step (416) in a guide section (411), the third guide section (413) extends from back to front, the second guide section (412) and the third guide section (413) are arranged at an angle at the engagement position to define the stop portion (419), the second guide section (412) and the third guide section (413) also have a limiting protrusion (431) for blocking the limiting rod from returning from the third guide section (413) to the third limiting step (417) in the second guide section (412) at the engagement position, and the engagement position between the third guide section (413) and the second guide section (412) has a limiting protrusion (431) for blocking the limiting rod from returning from the fourth guide section (414) to the fourth limiting step (418) in the third guide section (413).

14. The range hood according to any one of claims 2 to 13, characterized in that: The oil cup (15) is in the shape of an elongated strip. Mounting frames (23) are respectively provided on both sides of the bottom of the housing (10). The four-bar linkage assembly (3) has two groups arranged at intervals on the left and right. The two groups of four-bar linkage assemblies (3) are correspondingly arranged on the two mounting frames (23). The drive motor (30) is arranged on one of the mounting frames (23). The two ends of the oil cup (15) in the length direction are respectively connected to the power output ends of the two groups of four-bar linkage assemblies (3). The power output ends of the two four-bar linkage assemblies (3) are also connected via a linkage rod (24).

15. The range hood according to claim 14, characterized in that: The linkage rod (24) comprises a bracket body extending left and right and connecting arms (241) extending downward from two ends of the bracket body, the two connecting arms (241) are respectively connected to the power output ends of the two four-bar linkage assemblies (3), and the oil cup (15) is accommodated within a range defined by the bracket body and the two connecting arms (241).

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