Range hood
The connection design between the main smoke deflector and the side smoke deflector and the pressure stabilizing chamber structure solves the problems of unstable movement of the side smoke deflector and poor oil smoke inhalation, achieving better oil smoke absorption effect and reduction of oil pollution.
Patent Information
- Application Number
- CN202421376723.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-17
AI Technical Summary
The side smoke shield of the existing range hood is not freely controlled when opened, causing the smoke to rise and condense excessive oil on the front smoke shield, forming a downward bulge at the bottom that affects the air intake and has a poor smoke extraction effect.
A range hood is designed, in which a main smoke shield is connected to multiple side smoke shields, and the side smoke shields are hinged to the main smoke shield to form an upwardly concave bottom structure, forming an ultra-wide-angle air inlet shape, and forming a pressure-stabilizing cavity between the side smoke shields to ensure the movement stability of the side smoke shields and the downward shift of the negative pressure area.
The movement stability of the side smoke shield is improved, and the negative pressure area moves downward to envelop and surround the oil smoke, reducing the accumulation of condensed oil and dirt, improving the oil smoke absorption effect and maintaining an ultra-thin shape.
Smart Images
Figure CN222761000U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an oil fume purification device, in particular to an oil fume extractor. Background Art
[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It can quickly extract stove burnt waste and fumes generated during cooking and discharge them outdoors, reducing pollution and purifying the air.
[0003] For example, a range hood disclosed in a Chinese utility model patent with application number 202320194794.4 includes a smoke hood, a smoke shield and a motion mechanism for driving the smoke shield to move. The smoke hood has a front face with an air inlet formed on the front face. The front face of the smoke hood is provided with a first area and a second area below the first area. The second area is open to form the air inlet. The lower edge of the smoke shield is lower than the bottom surface of the smoke hood. The smoke shield has a first state and a second state under the drive of the motion mechanism. In the first state, the smoke shield covers at least a portion of the first area and the second area. In the second state, the smoke shield exposes the first area and the air inlet.
[0004] At present, there are many thin and light range hoods on the market, such as a range hood disclosed in the Chinese patent with application number 202221531491.9 of the applicant, including: a shell; at least two adjacent side smoke baffles, namely a first side smoke baffle and a second side smoke baffle, the two side smoke baffles are opposite to each other and are arranged side by side at the smoke inlet in a left and right manner, the tops of both can be constrained to rotate back and forth around a rotation axis extending in the left and right directions to the shell, the bottom edge of the second side smoke baffle is an arc edge extending along its own rotation direction, and a sliding member is provided at the rear of the first side smoke baffle, which can move along the arc edge of the second side smoke baffle and the moving path is located between the two ends of the arc edge; a driving device, whose output end is connected to the first side smoke baffle, and can drive the first side smoke baffle to rotate forward to the front side of the smoke inlet until the sliding member abuts against the limiting structure on the front end of the arc edge, and then pushes the second side smoke baffle to rotate forward to the front side of the smoke inlet.
[0005] However, the side smoke baffles of this range hood are constrained by the shell. When the number of side baffles is greater than or equal to 3, the degree of freedom is not 1, and the opening position of the side smoke baffles is uncontrolled; after rising, the oil smoke is easy to approach or stick to the front smoke baffle, resulting in excessive condensation of oil on the inside of the front smoke baffle, and may even drip downward; the bottom edge of each side smoke baffle is an arc edge, so when opened, the bottom of each side smoke baffle forms a downwardly convex arc, which is not conducive to air intake. Utility Model Content
[0006] The first technical problem to be solved by the utility model is to provide a range hood to improve the movement stability of the side smoke baffle in view of the deficiencies in the above-mentioned prior art.
[0007] The second technical problem to be solved by the present invention is to provide a range hood in view of the deficiencies in the above-mentioned prior art, so that the negative pressure zone moves downward, surrounds the oil smoke, and improves the oil smoke extraction effect.
[0008] The third technical problem to be solved by the present invention is to provide a range hood to reduce the accumulation of condensed oil on the smoke shield and form a larger pressure stabilizing chamber in view of the deficiencies in the above-mentioned prior art.
[0009] 8. The smoke shield of claim 7, wherein the at least one lateral movement of the smoke shield is configured to move the smoke shield away from the at least one lateral movement of the smoke shield. The smoke shield is configured to move the smoke shield away from the at least one lateral movement of the smoke shield. The smoke shield is configured to move the smoke shield away from the at least one lateral movement of the smoke shield.
[0010] When the main smoke deflector is opened, each first side smoke deflector is gradually unfolded forward to the front side of the air inlet, and each second side smoke deflector is also gradually unfolded forward to the front side of the air inlet;
[0011] When the main smoke baffle is closed, the first side smoke baffle and the second side smoke baffle are both retracted.
[0012] By connecting the side smoke shields to the main smoke shield, even if there are a large number of side smoke shields, each side smoke shield can be constrained by the main smoke shield and the free end is 1, so that each side smoke shield can move reliably and stably when unfolded.
[0013] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: when the main smoke baffle is opened, the bottom formed by the first side smoke baffles is in an upward concave shape, and the bottom formed by the second side smoke baffles is in an upward concave shape.
[0014] By making the bottom formed by the smoke shields on each side concave upward, an ultra-wide-angle air inlet shape is formed, which can move the negative pressure area downward, envelop and surround the oil smoke as it rises, promote the inhalation of the oil smoke, and improve the oil fume absorption effect.
[0015] To ensure that each side smoke shield forms the required air intake shape, the top of each of the first side smoke shield and the second side smoke shield is hinged to the main smoke shield respectively. When the main smoke shield is opened, from back to front, the length of the front edge of each first side smoke shield is L1, L2...Ln respectively, and the length of the front edge of each second side smoke shield is also L1, L2...Ln respectively. The distance between the rear end of the top of the first side smoke shield located at the rearmost side and the hinge point between itself and the main smoke shield is B1, and the distances between the hinge points of the remaining adjacent first side smoke shields and the main smoke shield are B2...Bn respectively. The distance between the rear end of the top of the second side smoke shield located at the rearmost side and the hinge point between itself and the main smoke shield is B1, and the distances between the hinge points of the remaining adjacent second side smoke shields and the main smoke shield are B1, B2...Bn respectively.
[0016] Where n is the number of the first-side smoke baffles, and L1>L2>...Ln and B1<L1, B2<L2...Bn<Ln are satisfied.
[0017] To ensure the movement track of the smoke shields on each side, the bottoms of the adjacent first side smoke shields are slidably matched with each other, and the bottoms of the adjacent second side smoke shields are slidably matched with each other.
[0018] The technical solution adopted by the utility model to solve the third technical problem is as follows: the air inlet assembly includes a first plate frame and a second plate frame arranged outside the first plate frame, the first plate frame includes a first plate body arranged transversely and second plates respectively arranged on the left and right sides of the first plate body, the second plate frame includes a third plate body arranged transversely and fourth plates respectively arranged on the left and right sides of the third plate body, the second plate body and the fourth plate body located on the left side respectively constitute the first side smoke baffle, the second plate body and the fourth plate body located on the right side respectively constitute the second side smoke baffle, the first plate frame and the second plate frame are gradually unfolded toward the front side of the air inlet as the main smoke baffle is opened, and when the main smoke baffle is opened, the second plate body is located in front of the fourth plate body;
[0019] A fifth plate body is also arranged between the two fourth plate bodies, and the fifth plate body is correspondingly arranged above the bottom of the air inlet, and a pressure stabilizing chamber is formed between the first plate body and the fourth plate body.
[0020] By forming a pressure-stabilizing chamber between the second plate body and the fifth plate body, the oil smoke can be prevented from flowing along the main smoke baffle when it rises, thereby reducing the accumulation of oil on the back of the main smoke baffle, while achieving better smoke trapping and exhaust, ensuring that the ultra-thin range hood still has a good oil fume absorption effect.
[0021] Preferably, the bottom of the first plate is in a shape that gradually slopes upward from the left and right sides to the middle, which can promote the concentration of oil smoke from the two sides to the middle, and at the same time guide the oil to the left and right sides for collection.
[0022] Preferably, the air inlet assembly also includes a third plate frame arranged between the first plate frame and the second plate frame, the third plate frame includes a sixth plate body arranged horizontally and a seventh plate body respectively arranged on the left and right sides of the third plate body, the front end of the third plate frame is rotatably connected to the side of the main smoke baffle plate facing the air inlet, the rotation center of the third plate frame is located between the rotation center of the first plate frame and the rotation center of the second plate frame, the seventh plate body located on the left side also constitutes the first side smoke baffle plate, and the seventh plate body located on the right side also constitutes the second side smoke baffle plate.
[0023] Preferably, to facilitate the connection of each plate body, a first rotating shaft is provided at the front end of the two second plate bodies, and a first shaft seat that is rotationally adapted to the first rotating shaft is provided on the main smoke deflector plate; a second rotating shaft is provided at the front end of the two fourth plate bodies, and a second shaft seat that is rotationally adapted to the second rotating shaft is provided on the main smoke deflector plate; a third rotating shaft is provided at the front end of the two seventh plate bodies, and a third shaft seat that is rotationally adapted to the third rotating shaft is provided on the main smoke deflector plate.
[0024] Preferably, in order to facilitate constraining the position of the bottom of each plate body, the front sides of the two fourth plate bodies are each provided with a longitudinally arranged first sliding hole, the bottoms of the two seventh plate bodies are each provided with a first sliding block slidably connected to the first sliding hole on the corresponding side, the front sides of the two seventh plate bodies are each provided with a longitudinally arranged second sliding hole, and the bottoms of the two second plate bodies are each provided with a second sliding block slidably connected to the second sliding hole on the corresponding side.
[0025] To facilitate the connection of the fourth plate bodies, the two fourth plate bodies are each provided with a fourth rotating shaft, and the two fourth rotating shafts are rotatably connected to the shell parts on the corresponding sides constituting the left and right sides of the air inlet.
[0026] Compared with the prior art, the advantages of the utility model are: by connecting the side smoke baffles with the main smoke baffle, even if there are a large number of side smoke baffles, each side smoke baffle can be constrained by the main smoke baffle and the free end is 1, and the movement of each side smoke baffle when unfolded is reliable and stable; by making the bottom jointly formed by the side smoke baffles in an upward concave shape, an ultra-wide-angle air inlet shape is formed, which can make the negative pressure area move downward, and the oil smoke is enveloped and surrounded when it rises, thereby promoting the inhalation of the oil smoke and improving the oil fume extraction effect; by forming a pressure-stabilizing chamber between the second plate body and the fifth plate body, the oil smoke is prevented from flowing close to the main smoke baffle when it rises, reducing the accumulation of oil and liquid on the back of the main smoke baffle, and at the same time achieving better smoke trapping and exhaust, ensuring that the ultra-thin range hood still has a good oil fume extraction effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of a range hood according to an embodiment of the utility model when the smoke baffle is closed;
[0028] Figure 2 This is a schematic diagram of a range hood according to an embodiment of the utility model after the smoke baffle is hidden;
[0029] Figure 3 This is a schematic diagram of a range hood according to an embodiment of the utility model when the smoke baffle is opened;
[0030] Figure 4 for Figure 3 Enlarged view of part I;
[0031] Figure 5 It is a schematic diagram of the air inlet assembly of the range hood according to the embodiment of the utility model when it is folded;
[0032] Figure 6 This is a schematic diagram of the air inlet assembly of the range hood according to an embodiment of the utility model when it is unfolded. DETAILED DESCRIPTION
[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0034] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration 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. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.
[0035] See also Figure 1 and Figure 3 A range hood comprises a shell 1 and a main smoke baffle 2. An air inlet 11 is provided on the front side of the shell 1. The main smoke baffle 2 can be turned back and forth around a rotation axis extending in the left and right directions and is arranged at the air inlet 11. It has a connecting end (upper end) and a free end (lower end). The connecting end can be connected only to the output end of its motion mechanism and can also be connected to the shell 1, while the free end is not connected to the shell 1 or other components.
[0036] See also Figure 2 to Figure 5 The range hood further comprises an air inlet assembly arranged at the air inlet 11. The air inlet assembly comprises a first plate frame 31, a second plate frame 32 and a third plate frame 34. The first plate frame 31 is arranged on the inner side of the second plate frame 32, and the third plate frame 34 is arranged between the first plate frame 31 and the second plate frame 32.
[0037] The first plate frame 31 includes a first plate body 311 disposed transversely and a second plate body 312 disposed on the left and right sides of the first plate body 311. The second plate frame 32 includes a third plate body 321 disposed transversely, a fourth plate body 322 disposed transversely, and a fifth plate body 323. The third plate body 321 and the fifth plate body 323 are disposed vertically and spaced apart. The fourth plate body 322 has two, and the two fourth plate bodies 322 are disposed on the left and right sides of the third plate body 321 and the fifth plate body 323. The third plate frame 34 includes a sixth plate body 341 disposed transversely and a seventh plate body 342 disposed on the left and right sides of the third plate body 321.
[0038] The front end of the first frame 31, the front end of the second frame 32, and the top front end of the third frame 34 are all rotatably connected (hinged) to the side of the main smoke baffle 2 facing the air inlet 11. The rotation axes of the front end of the first frame 31, the front end of the second frame 32, and the front end of the third frame 34 on the main smoke baffle 2 are all in the left-right direction. The rotation center of the second frame 32 is located between the rotation center of the main smoke baffle 2 and the rotation center of the first frame 31, and the rotation center of the third frame 34 is located between the rotation centers of the first frame 31 and the second frame 32.
[0039] The front ends of the two second plates 312 are each provided with a first rotating shaft 3122, and the main smoke baffle 2 is provided with a first shaft seat 21 that is rotatably matched with the first rotating shaft 3122. The front ends of the two fourth plates 322 are each provided with a second rotating shaft 3222, and the main smoke baffle 2 is provided with a second shaft seat 22 that is rotatably matched with the second rotating shaft 3222. The front ends of the two seventh plates 342 are each provided with a third rotating shaft 3423, and the main smoke baffle 2 is provided with a third shaft seat 23 that is rotatably matched with the third rotating shaft 3423. The two fourth plates 322 are each provided with a fourth rotating shaft 3223, and the two fourth rotating shafts 3223 are rotatably connected to the parts of the housing 1 that constitute the corresponding sides of the left and right sides of the air inlet 11.
[0040] The front sides of the two fourth plates 322 are each provided with a longitudinally arranged first sliding hole 3221, and the bottoms of the two seventh plates 342 are each provided with a first sliding block 3421 slidably connected to the first sliding hole 3221 on the corresponding side. The front sides of the two seventh plates 342 are each provided with a longitudinally arranged second sliding hole 3422, and the bottoms of the two second plates 312 are each provided with a second sliding block 3121 slidably connected to the second sliding hole 3422 on the corresponding side.
[0041] The fourth plate 322, the seventh plate 342 and the second plate 312 on the left are respectively configured as first side smoke deflectors, and the connection positions of the respective plates with the main smoke deflector 2 are arranged at intervals between the connection end and the free end, so that when the main smoke deflector 2 is flipped forward and opened, the respective first side smoke deflectors can be gradually unfolded forward; the fourth plate 322, the seventh plate 342 and the second plate 312 on the right are respectively configured as second side smoke deflectors, and the connection positions of the respective plates with the main smoke deflector 2 are arranged at intervals between the connection end and the free end, so that when the main smoke deflector 2 is flipped forward and opened, the respective second side smoke deflectors can be gradually unfolded forward. Figure 3 and Figure 6 When the main smoke baffle 2 is opened, the main smoke baffle 2 can sequentially bring out the first plate frame 31, the third plate frame 34 and the second plate frame 32 toward the front side. The bottom of the first plate body 311 is in a shape that gradually tilts upward from the left and right sides to the middle, and a pressure stabilizing chamber 33 is formed between the first plate body 311 and the fifth plate body 323. From back to front, the lengths of the front edge lines of each first side smoke baffle are L1, L2...Ln, and the lengths of the front edge lines of each second side smoke baffle are also L1, L2...Ln, and n is the number of first side smoke baffles. The distances between the hinge points of the adjacent first side smoke baffles and the main smoke baffle 2 are B2...Bn, respectively, and the distances between the adjacent second side smoke baffles and the hinge points of the main smoke baffle 2 are B2...Bn, respectively, wherein the distance between the rear end of the top of the first side smoke baffle located on the rearmost side and the hinge point between itself and the main smoke baffle 2 is B1, and the distance between the rear end of the top of the first side smoke baffle located on the rearmost side and the hinge point between itself and the main smoke baffle 2 is B1, and B1<L1, B2<L2...Bn<Ln are satisfied. In this way, the bottom formed by the first side smoke baffles together is in an upwardly concave shape, and the bottom formed by the second side smoke baffles together is in an upwardly concave shape. This form of multiple plate frames can construct a wide-angle air inlet channel composed of multiple segments of lines, so that the air inlet is lower and the negative pressure is fully moved downward. And the formed pressure stabilizing chamber 33 can achieve better smoke trapping and exhaust, ensuring that the ultra-thin range hood still has a good fume extraction effect.
[0042] In this embodiment, n=3, that is, the front edge length of the fourth plate 322 is L1, the front edge length of the second plate 322 is L3, the front edge length of the seventh plate 342 is L2, and L1>L2>…Ln is satisfied.
[0043] When the panels are unfolded, adjacent first side smoke shields at least partially overlap, and adjacent second side smoke shields at least partially overlap, so as to avoid pressure release caused by gaps between adjacent first side smoke shields or between adjacent second side smoke shields.
[0044] See also Figure 2 and Figure 5When the main smoke baffle 2 is closed, the first plate frame 31 can be folded inside the third plate frame 34 , the third plate frame 34 can be folded inside the second plate frame 32 , and the entire air inlet assembly is folded inside the shell 1 .
Claims
1. A range hood, comprising a housing (1) and a main smoke baffle (2), wherein an air inlet (11) is provided on the front side of the housing (1), and the main smoke baffle (2) is arranged at the air inlet (11) so as to be capable of being turned forward and backward around a rotation axis extending in the left-right direction, and the main smoke baffle (2) has a connecting end connected to the housing (1) and a free end opposite to the connecting end; the characteristics are as follows: The range hood further comprises an air inlet assembly arranged at the air inlet (11), the air inlet assembly comprising a first side smoke baffle arranged on the left side of the air inlet (11) and a second side smoke baffle arranged on the right side of the air inlet (11), the first side smoke baffle having at least two tops each of which can be constrained to rotate forward and backward on the main smoke baffle (2) around a rotation axis extending in the left-right direction, the second side smoke baffle having at least two tops each of which can be constrained to rotate forward and backward on the main smoke baffle (2) around a rotation axis extending in the left-right direction, the connection position of each first side smoke baffle to the main smoke baffle (2) is arranged at intervals between the connection end and the free end of the main smoke baffle (2), and the connection position of each second side smoke baffle to the main smoke baffle (2) is arranged at intervals between the connection end and the free end of the main smoke baffle (2); When the main smoke deflector (2) is opened, each first side smoke deflector is gradually unfolded forward to the front side of the air inlet (11), and each second side smoke deflector is also gradually unfolded forward to the front side of the air inlet (11); When the main smoke baffle (2) is closed, the first side smoke baffle and the second side smoke baffle are both retracted.
2. The range hood according to claim 1, characterized in that: When the main smoke baffle (2) is in an open state, the bottom formed by the first side smoke baffles together is in an upwardly concave shape, and the bottom formed by the second side smoke baffles together is in an upwardly concave shape.
3. The range hood according to claim 2, characterized in that: The first side smoke shield and the second side smoke shield are respectively hinged to the main smoke shield (2); when the main smoke shield (2) is in an open state, from back to front, the lengths of the front edge lines of the first side smoke shields are respectively L1, L2, ..., Ln; the lengths of the front edge lines of the second side smoke shields are also respectively L1, L2, ..., Ln; the distances between the hinge points of adjacent first side smoke shields and the main smoke shield (2) are respectively B1, B2, ..., Bn; and the distances between the hinge points of adjacent second side smoke shields and the main smoke shield (2) are respectively B1, B2, ..., Bn; Where n is the number of the first-side smoke baffles, and L1>L2>...Ln and B1<L1, B2<L2...Bn<Ln are satisfied.
4. The range hood according to claim 2, characterized in that: The bottoms of the adjacent first-side smoke baffles are slidably matched with each other, and the bottoms of the adjacent second-side smoke baffles are slidably matched with each other.
5. The range hood according to any one of claims 1 to 4, characterized in that: The air inlet assembly comprises a first plate frame (31) and a second plate frame (32) arranged outside the first plate frame (31); the first plate frame (31) comprises a first plate body (311) arranged transversely and a second plate body (312) respectively arranged on the left and right sides of the first plate body (311); the second plate frame (32) comprises a third plate body (321) arranged transversely and a fourth plate body (322) respectively arranged on the left and right sides of the third plate body (321); the second plate body (312) and the fourth plate body (322) located on the left side constitute the first side smoke baffle, and the second plate body (312) and the fourth plate body (322) located on the right side constitute the second side smoke baffle; the first plate frame (31) and the second plate frame (32) are gradually unfolded toward the front side of the air inlet (11) as the main smoke baffle (2) is opened; when the main smoke baffle (2) is opened, the second plate body (312) is located in front of the fourth plate body (322); A fifth plate body (323) is also arranged between the two fourth plate bodies (322), and the fifth plate body (323) is correspondingly arranged on the bottom of the air inlet (11), and the first plate body (311) and the fourth plate body (322) form an air inlet of the pressure stabilizing chamber (33).
6. The range hood according to claim 5, characterized in that: The bottom of the first plate (311) is in a shape that gradually slopes upward from the left and right sides to the middle.
7. The range hood according to claim 5, characterized in that: The air inlet assembly also includes a third plate frame (34) arranged between the first plate frame (31) and the second plate frame (32), the third plate frame (34) including a sixth plate body (341) arranged transversely and a seventh plate body (342) respectively arranged on the left and right sides of the third plate body (321), the front end of the third plate frame (34) is rotatably connected to the main smoke baffle (2) toward the air inlet (11), the rotation center of the third plate frame (34) is located between the rotation center of the first plate frame (31) and the rotation center of the second plate frame (32), the seventh plate body (342) located on the left side constitutes the first side smoke baffle, and the seventh plate body (342) located on the right side constitutes the second side smoke baffle.
8. The range hood according to claim 7, characterized in that: The front ends of the two second plate bodies (312) are each provided with a first rotating shaft (3122), and the main smoke shield (2) is provided with a first shaft seat (21) that is rotationally compatible with the first rotating shaft (3122). The front ends of the two fourth plate bodies (322) are each provided with a second rotating shaft (3222), and the main smoke shield (2) is provided with a second shaft seat (22) that is rotationally compatible with the second rotating shaft (3222). The front ends of the two seventh plate bodies (342) are each provided with a third rotating shaft (3423), and the main smoke shield (2) is provided with a third shaft seat (23) that is rotationally compatible with the third rotating shaft (3423).
9. The range hood according to claim 7, characterized in that: The front sides of the two fourth plates (322) are each provided with a first sliding hole (3221) arranged longitudinally, the bottoms of the two seventh plates (342) are each provided with a first sliding block (3421) slidably connected to the first sliding hole (3221) on the corresponding side, the front sides of the two seventh plates (342) are each provided with a second sliding hole (3422) arranged longitudinally, and the bottoms of the two second plates (312) are each provided with a second sliding block (3121) slidably connected to the second sliding hole (3422) on the corresponding side.
10. The range hood according to claim 5, characterized in that: The two fourth plates (322) are each provided with a fourth rotating shaft (3223), and the two fourth rotating shafts (3223) are rotatably connected to the shell (1) parts on the corresponding sides forming the left and right sides of the air inlet (11).
Citation Information
Patent Citations
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CN218096107U
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CN219868028U
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