A range hood

Abstract

This utility model discloses a range hood, comprising: an upper housing assembly; an air inlet body, which is movable relative to the upper housing assembly and has a first hidden state and a second exposed state, and has a smoke inlet formed thereon; a smoke baffle assembly, which can open and close the smoke inlet; a wire; and a motion mechanism, which includes a drive mechanism and a transmission mechanism that transmits the output of the drive mechanism to the air inlet body and the smoke baffle assembly; the transmission mechanism includes a crank, which is fixed to the smoke baffle assembly and rotatably connected to the upper housing assembly. The crank has two cranks and is respectively arranged on the left and right sides of the smoke baffle assembly. One crank is provided with a first wire cover. The wire is led out from a first wire outlet hole provided on the smoke baffle assembly and passes through the space formed by the first wire cover and the crank to enter the upper housing assembly.

Description

Technical Field

[0001] This utility model relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a fan system installed inside to draw in cooking fumes and filtering out some grease particles with a filter. The fan system is typically a centrifugal fan, consisting of a casing, an impeller housed within the casing, and a motor that drives the impeller. When the impeller rotates, a negative pressure suction is generated at the center of the fan, drawing the cooking fumes from below into the fan. After being accelerated by the fan, the fumes are collected by the casing and guided outwards.

[0003] Side-draft range hoods are widely popular due to their low risk of head bumps and effective smoke extraction. Examples include a concealed range hood disclosed in Chinese Patent Application No. 202310591483.6, a range hood with a movable smoke hood disclosed in Chinese Patent Application No. 201821250086.3, and a range hood disclosed in this applicant's Chinese Patent Application No. 202322823659.4.

[0004] The aforementioned type of range hood, with its retractable casing when turned off, saves countertop space, is easy to clean, and boasts a high-tech feel, making it increasingly popular in the market. This type of range hood typically places the switch on the back of the smoke baffle, which also features a display window. A back panel is installed behind the smoke baffle, and the switch assembly is fixed to the back panel. The control board above the fan is connected to the switch assembly via wires; the upper end of the wire connects to the control board, and the lower end passes through the casing and connects to the switch assembly on the back panel. Since both the air intake and the smoke baffle are moving parts, how to achieve reasonable wiring to avoid friction, scratches, and exposed wires is a pressing issue that needs to be addressed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a range hood in which the wires are adapted to the moving air intake body and the smoke baffle.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0007] Upper housing assembly;

[0008] The air inlet body can move relative to the upper housing assembly and has a first state and a second state, and a smoke inlet is formed on it;

[0009] When the air inlet is in the first state, the air inlet is housed inside the upper housing assembly, and the smoke baffle assembly is closed at the bottom of the upper housing assembly, thus closing the smoke inlet. When the air inlet is in the second state, the air inlet is at least partially exposed outside the upper housing assembly, and the smoke inlet is lower than the bottom of the upper housing assembly and exposed outside the upper housing assembly. The smoke baffle assembly is open, forming a smoke collection chamber between itself and the front side of the air inlet.

[0010] The wires electrically connect the switch assembly housed within the smoke baffle assembly to the electrical box located on top of the upper housing assembly; and

[0011] The motion mechanism includes a drive mechanism and a transmission mechanism that transmits the output of the drive mechanism to the air inlet and the smoke baffle assembly.

[0012] Its features are:

[0013] The transmission mechanism includes a crank, which is fixed to the smoke baffle assembly and rotatably connected to the upper housing assembly. There are two cranks, which are respectively arranged on the left and right sides of the smoke baffle assembly. One of the cranks is provided with a first wire cover. The wire is led out from the first wire outlet hole provided on the smoke baffle assembly and passes through the space formed by the first wire cover and the crank to enter the upper housing assembly.

[0014] By setting a first wire cover on the crank, the wires led out from the smoke baffle assembly can enter the upper housing assembly through the crank, making the wires suitable for range hoods where both the air inlet and the smoke baffle move. This allows for wiring from the smoke baffle assembly to the upper housing assembly without drilling holes in the upper housing assembly.

[0015] Furthermore, the first wire shielding cover includes a bottom cover, the bottom cover including a bottom plate, a first side and a second side, the bottom plate having a first end and a second end along its length direction, the wire passing through the bottom cover from the first end, the second end forming a second outlet hole for the wire to pass through, the first side and the second side being respectively disposed on opposite sides of the bottom plate, each side extending along the length direction of the bottom plate, the crank being closed at the ends of the two sides away from the bottom plate, thereby forming a space for the wire to pass through between the crank and the first wire shielding cover.

[0016] Furthermore, to facilitate fixing the position and direction of the wire within the first wire cover, a wire-holding groove is formed on the side of the base plate facing the crank, through which the wire passes.

[0017] Furthermore, to facilitate the guidance of the wire to the desired direction in the open and closed positions of the smoke baffle assembly, the first wire shield also includes a guide plate. The guide plate is disposed on the side of the base plate facing the crank and is close to the second wire outlet. The guide plate is formed by extending into the bottom cover from the position of the second side corresponding to the second end of the base plate. The wire passes between the first side and the guide plate.

[0018] Preferably, the guide plate is arc-shaped and protrudes towards the first side to smoothly guide the wire.

[0019] Furthermore, to facilitate the fixing of the first wire shield and the crank, the first wire shield also includes a screw post disposed on the base plate. The crank has a through hole at the position corresponding to the screw post, and the screw post passes through the through hole so that the first wire shield and the crank can be fixed by screws.

[0020] Furthermore, a stepped portion is formed at the end of the screw post near the crank, and the surface of the crank facing the base plate abuts against the stepped portion. The vertical distance between the surface of the crank away from the base plate and the end face of the screw post that penetrates the through hole is h, and h ≥ 0.5 mm, thereby providing preload force when the crank and the first wire cover are fixed.

[0021] Furthermore, to facilitate the connection between the wire and the switch assembly, the smoke baffle assembly includes a smoke baffle and a back plate disposed on the back of the smoke baffle. The back plate has a protrusion that protrudes away from the smoke baffle. A space for arranging the switch assembly is formed between the protrusion and the smoke baffle. The first wire outlet hole is disposed on the side of the protrusion facing the first wire cover.

[0022] Furthermore, to avoid exposing the wires on the back of the smoke baffle assembly and to ensure that the smoke baffle assembly is easy to clean, the smoke baffle assembly also includes a second wire shielding cover. The second wire shielding cover is disposed between the first wire outlet hole and the first wire shielding cover. The second wire shielding cover covers the first wire outlet hole. The end of the first wire shielding cover cooperates with the back plate to form a snap-fit. The wire passes through the first wire outlet hole and enters the snap-fit, and then enters the space between the first wire shielding cover and the crank.

[0023] Furthermore, to facilitate the disassembly of the wires and switch assembly, the side of the second wire shield away from the crank is fixed to the back plate with screws. The portion of the back plate located between the first wire outlet and the crank also forms a slot. The second wire shield includes a first buckle, which can slide along the length of the smoke baffle to achieve engagement or disengagement between the first buckle and the slot.

[0024] Furthermore, to facilitate the disassembly and installation of the second wire shield, the second wire shield also includes a second buckle, which can slide along the length of the smoke baffle so that the second buckle can be engaged into or disengaged from the buckle.

[0025] Furthermore, to facilitate the connection or disconnection of the wire and the switch assembly, the wire has a connection terminal that is electrically connected to the switch assembly, and the first outlet hole is not smaller than the size of the connection terminal so that the connection terminal can pass through.

[0026] Furthermore, the upper housing assembly includes a fixed panel located at its bottom. When the smoke baffle assembly is open, the upper end of the smoke baffle assembly is located below the fixed panel. When the smoke baffle assembly is closed, the smoke baffle assembly is located behind the fixed panel. The connection between the crank and the upper housing assembly is located above the fixed panel. Since the fixed panel is usually made of glass, it cannot be perforated. The wire enters the upper housing assembly from the crank, which can be well adapted to this type of range hood.

[0027] Furthermore, the upper housing assembly also includes an outer housing, side plates disposed inside the outer housing, and a fan frame disposed on the outer housing. A fan is housed within the fan frame. Two side plates are provided, one near the left side and the other near the right side of the outer housing. Each side plate extends in the front-rear direction of the outer housing, and the space between the two side plates communicates with the smoke inlet. The crank corresponds to the space on the side plate and the corresponding side of the outer housing. A wiring hole is provided on the side plate on the same side as the first wire shielding cover for wires to pass through. Thus, wires can be threaded through and guided upwards to the fan frame.

[0028] Furthermore, to avoid the wires rubbing against the air inlet, the wiring hole is positioned higher than the air inlet in the first state, so that the wires pass through the wiring hole from the outside of the side plate and run from above the air inlet.

[0029] Furthermore, to limit the routing direction of the wires within the outer casing, a bracket is provided on the outer side of the side plate with the wiring hole. The bracket is arranged adjacent to the wiring hole, and a notch is formed at the rear end of the bracket. The notch is located behind the wiring hole, and the wire extends from the first wire cover, passes around the notch, and then enters the wiring hole.

[0030] Furthermore, to prevent the wires from rubbing against the crank, the horizontal distance between the bracket and the wire hole in the left-right direction of the range hood must be greater than the thickness of the crank.

[0031] Furthermore, to facilitate the fixing of the wires and the bracket in the vertical direction, the bracket is also provided with fixing holes to facilitate the fixing of the wires and the bracket by wire ties.

[0032] Compared with the prior art, the advantages of this utility model are as follows: by setting a first wire cover on the crank, the wire led out from the smoke baffle assembly can enter the upper housing assembly through the crank, making the wire suitable for the form of a range hood where both the air inlet and the smoke baffle move, and the wiring can be routed from the smoke baffle assembly to the upper housing assembly without drilling holes in the upper housing assembly; by setting a second wire cover on the back of the smoke baffle, the wire is completely not exposed on the back of the smoke baffle assembly, which makes it easy to clean the back of the smoke baffle assembly. The structure is simple and easy for users to maintain. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the range hood in the open state according to an embodiment of the present utility model;

[0034] Figure 2 This is a cross-sectional view of the range hood in the open state according to an embodiment of the present utility model;

[0035] Figure 3 This is a cross-sectional view (section and cross-section) of the range hood in the open state according to an embodiment of the present invention. Figure 2 parallel);

[0036] Figure 4 This is a cross-sectional view of the smoke baffle assembly, wire, and first wire shielding cover of the range hood according to an embodiment of the present utility model;

[0037] Figure 5 This is a schematic diagram of the first wire shielding cover of the range hood according to an embodiment of the present utility model;

[0038] Figure 6 This is a cross-sectional view of the first wire shield and crank of the range hood according to an embodiment of the present utility model;

[0039] Figure 7 for Figure 6 A magnified schematic diagram of part I;

[0040] Figure 8 This is a schematic diagram of the smoke baffle assembly, wire, crank, and first wire shielding cover of the range hood according to an embodiment of the present utility model;

[0041] Figure 9 This is an exploded structural diagram of the smoke baffle assembly, wires, and crank of the range hood according to an embodiment of the present utility model;

[0042] Figure 10 This is a schematic diagram of the back plate of the smoke baffle assembly of the range hood according to an embodiment of the present utility model;

[0043] Figure 11 This is a schematic diagram of the second wire shielding cover of the smoke baffle assembly of the range hood according to an embodiment of the present utility model;

[0044] Figure 12This is a schematic diagram of the transmission mechanism of the moving mechanism of the range hood according to an embodiment of the present utility model;

[0045] Figure 13 This is a schematic diagram of the open state of the upper housing assembly of the hidden part of the range hood according to an embodiment of the present utility model;

[0046] Figure 14 This is a cross-sectional view (section and cross-section) of the range hood in the open state according to an embodiment of the present invention. Figure 2 parallel);

[0047] Figure 15 This is a schematic diagram of the closed state of the range hood according to an embodiment of the present utility model (the oil cup is not shown; the oil cup is exposed in the smoke baffle assembly);

[0048] Figure 16 This is a cross-sectional view of the range hood in the closed state according to an embodiment of the present utility model. Detailed Implementation

[0049] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0050] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0051] See Figure 1 , Figure 2 , Figure 14 and Figure 15 A range hood includes an upper housing assembly 1, an air inlet 2, a smoke baffle assembly 3, and an oil cup 4.

[0052] The upper housing assembly 1 houses the fan 8. The air inlet 2 has a smoke inlet 21 on its front side, which can move relative to the upper housing assembly 1, thus having a first state and a second state. When the air inlet 2 is in the first state, it is housed within the upper housing assembly 1 and located below the fan 8, thus concealing the air inlet 2. When the air inlet 2 is in the second state, it is at least partially exposed above the upper housing assembly 1, ensuring that the smoke inlet 21 is below the bottom of the upper housing assembly 1 and exposed above it.

[0053] The smoke baffle assembly 3 is installed at the bottom of the upper housing assembly 1, and it can be in the third and fourth states, see [link / reference]. Figure 1 and Figure 2 When the air inlet 2 is in the second state, the smoke baffle assembly 3 is in the third state, and a smoke-collecting cavity Q is formed between the smoke baffle assembly 3 and the front side of the air inlet 2, realizing the downward movement of the smoke inlet 21 and the increase of the smoke-collecting area, ensuring a better oil fume extraction effect in the working state; when the air inlet 2 is in the first state, the smoke baffle assembly 3 is in the fourth state, see Figure 15 The smoke baffle assembly 3 is enclosed at the bottom of the upper housing assembly 1. It can extend horizontally and be flush with the bottom of the upper housing assembly 1 to achieve a completely flat closed state. At the same time, it closes the smoke inlet 21 of the air inlet 2, minimizing the overall size of the unit.

[0054] The oil cup 4 is located at the bottom rear side of the air inlet 2.

[0055] See also Figure 2 , Figure 12 , Figure 14 and Figure 15 The air inlet 2 can move up and down or rotate around a fixed axis relative to the upper housing assembly 1, as described in the background art, or it can rotate around a non-fixed axis relative to the upper housing assembly 1. The range hood also includes a motion mechanism, which includes a drive mechanism 51 and a transmission mechanism. In this embodiment, the air inlet 2 rotates around a non-fixed axis. In this embodiment, the drive mechanism 51 is an electric push rod, which is rotatably installed inside the upper housing assembly 1, and its output end is connected to the air inlet 2 through a transmission connection, thereby driving the air inlet 2 to move relative to the upper housing assembly 1. In this embodiment, its output end is directly connected to the rear bottom of the air inlet 2, and it is a rotatable connection. The rotation axes of the upper and lower mounting positions of the drive mechanism 51 both extend in the left-right direction of the range hood. The air inlet 2 is movably connected to the upper housing assembly 1, so that it can rotate around a non-fixed axis relative to the upper housing assembly 1 when the drive mechanism 51 is activated.

[0056] The transmission mechanism has two sets, arranged on the left and right sides of the upper housing assembly 1 respectively. These transmission mechanisms connect the air inlet 2, the smoke baffle assembly 3, and the oil cup 4, allowing for stable movement of the left and right sides of the air inlet 2 and the smoke baffle assembly 3. Each transmission mechanism includes a first connecting rod 521, a second connecting rod 522, a third connecting rod 523, a crank 525, and a rocker arm 526. The upper housing assembly 1 serves as the frame of the entire transmission mechanism. One end of the crank 525 is rotatably connected to the interior of the upper housing assembly 1, while the other end is fixed to the smoke baffle assembly 3. The connection point between the crank 525 and the upper housing assembly 1 is denoted as the first hinge point A (a hinge point is any point on the axis of the hinge shaft). The connection point between the crank 525 and the upper housing assembly 1 is located inside the upper housing assembly 1, and the first hinge point A is located above the fixed panel 11. The second connecting rod 522 is fixed to the air inlet body 2. It can extend along the outer side (left and right sides) of the smoke inlet 21 inside the air inlet body 2 and extend out of the air inlet body 2 to be rotatably connected to the crank 525. This rotatable connection point is denoted as the second hinge point B. The second hinge point B does not coincide with the first hinge point A. One end of the first connecting rod 521 is rotatably connected to the crank 525 (the connection point is denoted as the third hinge point C), and the other end is rotatably connected to one end of the rocker arm 526 (the connection point is denoted as the fourth hinge point D). The second hinge point B is located between the first hinge point A and the third hinge point C. The other end of the rocker arm 526 is rotatably connected to the inside of the upper housing assembly 1 (the connection point is denoted as the sixth hinge point F). The connection point between the rocker arm 526 and the upper housing assembly 1 is close to the rear side of the upper housing assembly 1 and higher than any of the aforementioned hinge points. One end of the third link 523 is rotatably connected to the rear end of the second link 522 located inside the air inlet 2 (the connection point is denoted as the seventh hinge point G), and the other end is rotatably connected to the rocker arm 526 (the connection point is denoted as the fifth hinge point E). The fifth hinge point E is located between the fourth hinge point D and the sixth hinge point F.

[0057] The rotation axes of all the above-mentioned rotating connections extend along the left-right direction of the range hood.

[0058] Therefore, when the start-up drive mechanism 51 is activated, it pushes the air intake 2 downward. The air intake 2 then rotates around the first hinge point A via the second connecting rod 522, and through its cooperation with the first connecting rod 521, the third connecting rod 523, and the rocker arm 526 (achieving a movable connection between the air intake 2 and the upper housing assembly 1), it achieves downward flipping and backward movement against the wall (a compound motion of the air intake 2). The same principle applies when the air intake 2 retracts and hides inside the upper housing assembly 1. This motion mechanism ensures that the air intake 2 does not stray far from the wall during its movement and in its final state, thus ensuring effective fume extraction. The movement of the air intake 2, via the second connecting rod 522, causes the crank 525 to rotate around the first hinge point A (the rotation of the crank 525 achieves a non-fixed-axis rotation of the second connecting rod 522), thereby realizing the opening and closing motion of the smoke baffle assembly 3.

[0059] The smoke baffle assembly 3 includes a smoke baffle 31 and a back plate 32 disposed on the back of the smoke baffle 31. The back refers to the side of the smoke baffle assembly 3 away from the user when it is in the third state (i.e., the side facing the air inlet 2 when it is in the fourth state). A switch assembly (not shown) is provided between the smoke baffle 31 and the back plate 32. The back plate 32 is made of high-strength sheet metal and is glued to the smoke baffle 31 to enhance the rigidity of the smoke baffle 31 and prevent it from deforming. The method of setting the switch assembly in the smoke baffle assembly 3 is the same as in the prior art and will not be described again here. An electrical box 6 is provided on the top of the upper housing assembly 1. The switch assembly and the electrical box 6 are electrically connected by wires 7 to realize the electrical control and power supply of the switch assembly.

[0060] The upper housing assembly 1 includes a fixed panel 11 located at its bottom, typically a glass panel. When the smoke baffle assembly 3 is in the third state, its upper end is located below the fixed panel 11; when the smoke baffle assembly 3 is in the fourth state, it is located behind the fixed panel 11. Therefore, the wire 7 cannot enter the upper housing assembly 1 by drilling holes in the fixed panel 11. Furthermore, the routing of the wire 7 must accommodate the movement of the air inlet 2. Therefore, in this embodiment, the routing of the wire 7 utilizes the motion mechanism and the specific structure of the upper housing assembly 1.

[0061] For details, see Figures 2 to 11 The range hood also includes a first wire shielding cover 9 and a second wire shielding cover 33, the second wire shielding cover 33 being part of the smoke baffle assembly 3. The back plate 32 has a protrusion 321 that protrudes away from the smoke baffle 31. A switch assembly (not shown) is positioned corresponding to the protrusion 321 and located between the back plate 32 and the smoke baffle 31. An opening can be made at the position corresponding to the switch assembly on the protrusion 321, and a removable switch back plate 34 can be provided. A first wire outlet hole 322 is formed between the left or right side of the protrusion 321 and the smoke baffle 31. The first wire outlet hole 322 should be no smaller than the size of the connection terminal 71 at the end of the wire 7, allowing the connection terminal 71 to pass through. After the switch assembly is positioned and fixed to the back plate 32, the connecting wire from the switch assembly is connected (electrically connected) to the connection terminal 71 of the wire 7. The connection terminal 71 is inserted from the first wire outlet hole 322 between the back plate 32 and the smoke baffle 31. The portion of the wire 7 outside the first outlet hole 322 is exposed. To facilitate future maintenance of the switch assembly and disassembly of the connection terminal 71, a second wire cover 33 is provided adjacent to the first outlet hole 322.

[0062] The first wire shielding cover 9 is fixed to the crank 525 of one of the transmission mechanisms. The first wire outlet hole 322 is located on the side adjacent to the crank 525. In this embodiment, the first wire shielding cover 9 is located on the left crank 525. The first wire shielding cover 9 is not higher than the third hinge point C. The crank 525 has a sheet-like structure, while the first wire shielding cover 9 is a cover with a side opening. The crank 525 is closed on the opening side of the first wire shielding cover 9. The specific structure of the first wire shielding cover 9 will be described in detail below. The aforementioned second wire shielding cover 33 is located between the first wire outlet hole 322 and the first wire shielding cover 9. The first wire shielding cover 9 is located on the side of the crank 525 away from the second wire shielding cover 33. The second wire shielding cover 33 needs to cover the first wire outlet hole 322. The end of the first wire shielding cover 9 cooperates with the back plate 32 to form a bayonet 91, allowing the wire 7 to enter the bayonet 91 from the second wire shielding cover 33 and then enter the space between the first wire shielding cover 9 and the crank 525. Alternatively, the first wire shielding cover 9 can be positioned on the side of the crank 525 facing the second wire shielding cover 33. The side of the second wire shielding cover 33 away from the crank 525 is fixed to the back plate 32 with screws. The portion of the back plate 32 located between the first wire outlet hole 322 and the crank 525 also forms a slot 323. The second wire shielding cover 33 includes a first snap fastener 331, which can be located on the upper side of the second wire shielding cover 33 as a whole. It cooperates with the slot 323 to allow the second wire shielding cover 33 to be snapped and fixed to the back plate 32. The slot 323 is preferably horizontally L-shaped, so that the second wire shielding cover 33 can slide along the length direction of the smoke baffle 31 (i.e., the left-right direction of the range hood) to achieve snapping and release. The second wire shielding cover 33 also includes a second snap fastener 332, which can slide along the length direction of the smoke baffle 31 (i.e., the left-right direction of the range hood) to snap into or release from the slot 91.

[0063] After the wire 7 is connected to the switch assembly, its portion on the back of the smoke baffle 31 is covered by the back plate 32 and the second wire cover 33, ensuring that the wire 7 on the back of the smoke baffle 31 is completely concealed and not exposed, achieving a safer and easier-to-clean purpose. When the switch assembly needs maintenance, the screws on the second wire cover 33 are removed, and the second wire cover 33 is slid away from the first wire cover 9. Figure 8 As shown, sliding to the left causes the first latch 331 on the second wire cover 33 to disengage from the back plate 32 and the second latch 332 to disengage from the first wire cover 9, thereby separating the second wire cover 33. Then, the wire 7 (including the connecting terminal 71, which is separated from the switch assembly when removed) can be taken out from the first wire outlet hole 322. Then, the switch back plate 34 on the back plate 32 is opened, and the switch assembly is released, allowing the switch assembly to be removed for repair or replacement.

[0064] The first wire-blocking cover 9 includes a bottom cover 92 and a wire-locking groove 93 disposed on the bottom cover 92. The bottom cover 92 includes a base plate 921, a first side 9221, and a second side 9222. The shape of the base plate 921 is the same as the corresponding part of the crank 525, such as... Figure 2 As shown, when the smoke baffle assembly 3 is in the third state, the base plate 921 has a generally downwardly convex arc shape. The base plate 921 has a first end and a second end along its length. The first end is close to the smoke baffle assembly 3, and the second end forms a second outlet hole 923 for the wire 7 to pass through. The base plate 921 is located on the outside of the crank 525, where "outer" refers to the side of the crank 525 away from the other crank 525, i.e., the left side of the left crank 525 shown in this embodiment. The first side 9221 and the second side 9222 are respectively disposed on opposite sides of the base plate 921, each side extending along the length of the base plate 921, so that the bottom cover 92 has an overall open-sided shape. The crank 525 is disposed at the opening of the bottom cover 92, i.e., the crank 525 is closed at the ends of the two sides away from the base plate 921. When the smoke baffle assembly 3 is in the third state, the first side 9221 is located above the second side 9222, and the aforementioned slot 91 is formed by the first side 9221 engaging with the back plate 32 of the smoke baffle assembly 3 at a position corresponding to the first end of the base plate 921.

[0065] A wire-holding groove 93 is formed on the side of the base plate 921 facing the crank 525. After the wire 7 passes between the first wire shield 9 and the crank 525, it passes through the wire-holding groove 93, thereby fixing the position and direction of the wire 7. In this embodiment, there are two wire-holding grooves 93 arranged at intervals along the length of the base plate 921, one of which is close to the smoke baffle assembly 3, while the other is relatively far away from the smoke baffle assembly 3.

[0066] The first wire shield 9 also includes a guide plate 94, which is also disposed on the side of the base plate 921 facing the crank 525, see [reference]. Figure 4 and Figure 5 The guide plate 94 is located near the second cable outlet 923. It is formed by extending into the bottom cover 92 from the position corresponding to the second end of the bottom plate 921 on the second side 9222. The guide plate 94 may be arc-shaped, protruding towards the first side 9221. The end of the guide plate 94 inside the bottom cover 92 may be located between the cable retaining groove 93 and the second side 9222. The wire 7 passes between the first side 9221 and the guide plate 94. When the smoke baffle assembly 3 is in the third state, the guide plate 94 is located below the wire 7. See [reference needed]. Figure 16When the smoke baffle assembly 3 is in the fourth state, due to the rotation of the crank 525, the second cable outlet 923 moves to the front side near the upper housing assembly 1, located above the fixed panel 11. At this time, the guide plate 94 is located above the wire 7. Thus, the guide plate 7 plays the role of moving the wire 7 to a set side when the smoke baffle assembly 3 is closed. That is to say, after the range hood is turned off, the drive mechanism 51 pulls the air inlet 2 upward, and the transmission mechanism causes the smoke baffle assembly 3 to close. The guide plate 94 on the first cable cover 9 pushes the wire 7 to bend towards the front of the range hood, preventing the wire 7 from rubbing against the transmission mechanism at the rear.

[0067] See also Figures 5-7 The first wire cover 9 also includes a screw post 95 disposed on the base plate 921. The end of the screw post 95 near the crank 525 has a stepped portion 951. A through hole 5251 is provided at the position corresponding to the crank 525 and the screw post 95. The screw post 95 can pass through the through hole 5251. The surface of the crank 525 facing the base plate 921 abuts against the stepped portion 951. The vertical distance (height difference) between the surface of the crank 525 away from the base plate 921 and the end face of the screw post 95 that passes through the through hole 5251 is h, and satisfies h≥0.5mm. Thus, when the crank 525 and the screw post 95 are connected by screws, the height difference can provide preload.

[0068] See also Figure 2 , Figure 3 , Figures 13-15 The upper housing assembly 1 also includes an outer housing 12, side plates 13 disposed inside the outer housing 12, and a fan frame 14 disposed on the outer housing 12. The aforementioned fan 8 is disposed within the fan frame 14. There are two side plates 13, respectively located near the left and right sides of the outer housing 12, extending in the front-rear direction of the outer housing 12, forming a relatively enclosed space between the side plates 13 and the corresponding sides of the outer housing 12 (only the wiring hole 131 described below communicates with the space between the two side plates 13). The space between the two side plates 13 communicates with the smoke inlet 21. Thus, through the arrangement of the side plates 13, the transmission mechanism can be disposed within the enclosed space on the corresponding side to avoid contamination and interference from oil fumes, and the wire 7 can also avoid contamination from oil fumes. A wiring hole 131 is provided on the side plate 13 on the same side as the first wire shield 9 (in this embodiment, the left side plate 13), allowing the wire 7 to pass through the wiring hole 131 and enter the space between the two side plates 13 within the outer housing 12. The wiring hole 131 is positioned higher than the air inlet 2 in the first state, thereby allowing the wire 7 to pass through the wiring hole 131 from the outside of the side plate 13 (the outside refers to the side facing the corresponding side of the outer casing 12, i.e., the outside of the left side plate 13 is the left side of the side plate 13) and run from above the air inlet 2.

[0069] A bracket 15 is provided on the outer side of the side plate 13. The bracket 15 is adjacent to the wiring hole 131. A notch 151 is formed at the rear end of the bracket 15. The notch 151 is located behind the wiring hole 131. The wire 7 extends from the first wire cover 9, passes around the notch 151, and then enters the wiring hole 131. The horizontal distance between the bracket 15 and the wiring hole 131 in the left-right direction of the range hood must be greater than the thickness of the crank 525 (the dimension along the left-right direction of the range hood) to prevent the wire 7 from rubbing against the crank 525 when the transmission mechanism moves. The bracket 15 is also provided with a fixing hole 152 to facilitate the fixing of the wire 7 and the bracket 15 with wire ties.

[0070] The fan frame 14 includes a frame body 141 and a front cover plate 142 located on the front side of the frame body 141. The frame body 141 is a cuboid with an open front side, and the front cover plate 142 is located at the open front side of the frame body 141. When the fan 8 needs to be inspected, the front cover plate 142 can be removed. The wire 7 passes above the air inlet body 2, bends and enters the space at the connection between the frame body 141 and the front cover plate 142, and then connects upwards to the electrical box 6. The wiring method here is the same as that of existing top-mounted range hoods, and will not be described in detail here.

Claims

1. A range hood, comprising: Upper housing assembly (1); The air inlet (2) can move relative to the upper housing assembly (1) and has a first state and a second state, and a smoke inlet (21) is formed thereon; When the air inlet (2) is in the first state, the air inlet (2) is housed in the upper housing assembly (1), and the smoke baffle assembly (3) is closed at the bottom of the upper housing assembly (1) to close the smoke inlet (21); when the air inlet (2) is in the second state, the air inlet (2) is at least partially exposed in the upper housing assembly (1), and the smoke inlet (21) is lower than the bottom of the upper housing assembly (1) and exposed in the upper housing assembly (1), and the smoke baffle assembly (3) is open to form a smoke collection chamber (Q) between itself and the front side of the air inlet (2); The wire (7) electrically connects the switch assembly located inside the smoke baffle assembly (3) and the electrical box (6) located on top of the upper housing assembly (1); and The motion mechanism includes a drive mechanism (51) and a transmission mechanism that transmits the output of the drive mechanism (51) to the air intake (2) and the smoke baffle assembly (3); Its features are: The transmission mechanism includes a crank (525), which is fixed to the smoke baffle assembly (3) and rotatably connected to the upper housing assembly (1). There are two cranks (525) and they are respectively arranged on the left and right sides of the smoke baffle assembly (3). One of the cranks (525) is provided with a first wire cover (9). The wire (7) is led out from the first wire outlet hole (322) provided on the smoke baffle assembly (3) and passes through the space formed by the first wire cover (9) and the crank (525) to enter the upper housing assembly (1).

2. The hood according to claim 1, characterized in that: The first wire shield (9) includes a bottom cover (92), the bottom cover (92) includes a bottom plate (921), a first side (9221) and a second side (9222), the bottom plate (921) has a first end and a second end along its length direction, the wire (7) passes through the bottom cover (92) from the first end, and the second end forms a second wire outlet hole (923) for the wire (7) to pass through. The first side (9221) and the second side (9222) are respectively provided on opposite sides of the bottom plate (921), each side extending along the length direction of the bottom plate (921), and the crank (525) is closed at the ends of the two sides away from the bottom plate (921).

3. The hood according to claim 2, characterized in that: The base plate (921) has a wire-holding groove (93) formed on the side facing the crank (525), through which the wire (7) passes.

4. The hood according to claim 3, characterized in that: The first wire cover (9) also includes a guide plate (94), which is disposed on the side of the base plate (921) facing the crank (525). The guide plate (94) is close to the second wire outlet (923). The guide plate (94) is formed by extending into the bottom cover (92) from the position of the second side (9222) corresponding to the second end of the base plate (921). The wire (7) passes between the first side (9221) and the guide plate (94).

5. The range hood according to claim 4, characterized in that: The guide plate (94) is arc-shaped and protrudes toward the first side (9221).

6. The range hood according to claim 2, characterized in that: The first wire shield (9) also includes a screw post (95) disposed on the base plate (921). The crank (525) has a through hole (5251) at the position corresponding to the screw post (95). The screw post (95) passes through the through hole (5251) so that the first wire shield (9) and the crank (525) can be fixed by screws.

7. The range hood according to claim 6, characterized in that: The end of the screw post (95) near the crank (525) has a stepped portion (951). The surface of the crank (525) facing the base plate (921) abuts against the stepped portion (951). The vertical distance between the surface of the crank (525) away from the base plate (921) and the end face of the screw post (95) that enters the through hole (5251) is h, and h ≥ 0.5 mm.

8. The range hood according to claim 1, characterized in that: The smoke baffle assembly (3) includes a smoke baffle (31) and a back plate (32) disposed on the back of the smoke baffle (31). The back plate (32) has a protrusion (321) that protrudes away from the smoke baffle (31). A space for arranging a switch assembly is formed between the protrusion (321) and the smoke baffle (31). The first wire outlet hole (322) is disposed on the side of the protrusion (321) facing the first wire cover (9).

9. The range hood according to claim 8, characterized in that: The smoke baffle assembly (3) further includes a second wire shield (33), which is disposed between the first wire outlet hole (322) and the first wire shield (9). The second wire shield (33) covers the first wire outlet hole (322). The end of the first wire shield (9) cooperates with the back plate (32) to form a bayonet (91). The wire (7) passes through the first wire outlet hole (322) and enters the bayonet (91), and then enters the space between the first wire shield (9) and the crank (525).

10. The range hood according to claim 9, characterized in that: The second wire shield (33) is fixed to the back plate (32) by screws on the side away from the crank (525). The portion of the back plate (32) located between the first wire outlet (322) and the crank (525) also forms a slot (323). The second wire shield (33) includes a first buckle (331). The second wire shield (33) can slide along the length direction of the smoke baffle (31) to achieve the first buckle (331) engaging and fixing with the slot (323) or disengaging.

11. The range hood according to claim 10, characterized in that: The second wire shield (33) also includes a second buckle (332), which can slide along the length of the smoke baffle (31) so that the second buckle (332) can be engaged into or disengaged from the slot (91).

12. The range hood according to claim 1, characterized in that: The wire (7) has a connection terminal (71) that is electrically connected to the switch assembly, and the first outlet hole (322) is not smaller than the size of the connection terminal (71) so that the connection terminal (71) can pass through.

13. The range hood according to claim 1, characterized in that: The upper housing assembly (1) includes a fixed panel (11) located at its bottom. When the smoke baffle assembly (3) is open, the upper end of the smoke baffle assembly (3) is located below the fixed panel (11). When the smoke baffle assembly (3) is closed, the smoke baffle assembly (3) is located behind the fixed panel (11). The connection between the crank (525) and the upper housing assembly (1) is located above the fixed panel (11).

14. The range hood according to claim 1, characterized in that: The upper housing assembly (1) also includes an outer housing (12), a side plate (13) disposed inside the outer housing (12), and a fan frame (14) disposed on the outer housing (12). A fan (8) is disposed inside the fan frame (14). The side plate (13) has two and is disposed close to the left and right sides of the outer housing (12), respectively. Each side plate (13) extends in the front-rear direction of the outer housing (12). The space between the two side plates (13) is connected to the smoke inlet (21). The crank (525) corresponds to the space on the corresponding side of the side plate (13) and the outer housing (12). The side plate (13) on the same side as the first wire cover (9) is provided with a wiring hole (131) for the wire (7) to pass through.

15. The range hood according to claim 14, characterized in that: The wiring hole (131) is positioned higher than the air inlet (2) in the first state, so that the wire (7) passes through the wiring hole (131) from the outside of the side plate (13) and runs from above the air inlet (2).

16. The range hood according to claim 14, characterized in that: A bracket (15) is provided on the outer side of the side plate (13) with a wiring hole (131). The bracket (15) is arranged adjacent to the wiring hole (131). A notch (151) is formed at the rear end of the bracket (15). The notch (151) is located on the rear side of the wiring hole (131). The wire (7) extends from the first wire cover (9), passes around the notch (151), and then enters the wiring hole (131).

17. The range hood according to claim 16, characterized in that: The horizontal distance between the bracket (15) and the wiring hole (131) in the left-right direction of the range hood needs to be greater than the thickness of the crank (525).

18. The range hood according to claim 16, characterized in that: The bracket (15) is also provided with fixing holes (152) to facilitate the fixing of the wire (7) and the bracket (15) through wire ties.

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