Range hood

Abstract

The utility model discloses a range hood which comprises an upper box body, a lower box body at least partially located below the upper box body and a fan system arranged in the upper box body, the range hood further comprises a movement mechanism used for driving the lower box body to ascend and descend relative to the upper box body, and the movement mechanism comprises a driving mechanism in a linear driving module form. The driving mechanism comprises a lead screw capable of rotating along the axis of the lead screw, the lead screw extends up and down on the inner side of the rear portion of the upper box body, the movement mechanism further comprises a connecting plate enabling the driving mechanism to be isolated from oil smoke in the upper box body, and the lead screw is arranged on the inner side of the connecting plate. The movement mechanism further comprises a support used for supporting the bottom of the lead screw and a screw used for connecting the support and the connecting plate, the screw comprises an exposed part which is partially exposed out of the side, facing the inner side of the upper box body, of the connecting plate, and the extractor hood further comprises a flow guiding piece capable of receiving and guiding oil dripping from the exposed part.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] A range hood is a kitchen appliance for purifying the kitchen environment. It can quickly extract and discharge the waste generated by stove combustion and the oil fume generated during cooking outdoors, reduce pollution, and purify the air.

[0003] For example, a range hood disclosed in a Chinese utility model patent with the application number 202120687386.3 includes an air outlet body, an air inlet body at least partially located below the air outlet body, and a motion mechanism. The air outlet body includes a fan frame and a fan outer cover arranged outside the fan frame. The fan outer cover covers the left, right, and front three sides of the fan frame. The range hood further includes a motion mechanism for driving the air inlet body to move up and down. The motion mechanism includes a driving mechanism, a transmission mechanism, and a guiding mechanism. Among them, the driving mechanism is a motor, which is arranged on the air outlet plate. The transmission mechanism includes a vertically extending lead screw and a nut arranged on the lead screw. The motor can be connected to the lead screw through structures such as a worm and a worm gear, or directly connected to the lead screw, so as to drive the lead screw to rotate around its own axis. The nut is sleeved on the outer periphery of the lead screw and is threadedly connected to the lead screw. Therefore, when the lead screw rotates, the nut can be driven to move up and down along the lead screw.

[0004] To improve the reliability of the lead screw, the lead screw usually cannot be contacted by the oil fume inside the range hood. The lead screw is isolated from the inside of the fan frame by a connecting plate in the shape of a "ji" character. To make the worm firmly positioned, the bottom of the connecting plate is positioned by a support seat at the bottom of the lead screw. The left and right ends of the support seat are fixed to the connecting plate by screws. The screws extend from the outside of the connecting plate into the inside of the fan frame, and part of the screws will be exposed. When the range hood is working, the oil fume enters the fan assembly through the air inlet channel, and the oil liquid will condense and drip on the exposed screws, posing a risk of dripping downward to the lower part of the range hood. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a range hood aiming at the deficiencies existing in the above-mentioned prior art, which can receive and guide the oil liquid dripping from the part of the screw of the fixed support seat exposed inside the upper box body, and prevent the oil liquid from dripping downward to the lower part of the range hood.

[0006] The technical solution adopted by the present utility model to solve the above technical problems is as follows: An oil fume extractor includes an upper box body, a lower box body at least partially located below the upper box body, and a fan system disposed in the upper box body. The oil fume extractor further includes a motion mechanism for driving the lower box body to move up and down relative to the upper box body. The motion mechanism includes a driving mechanism in the form of a linear driving module. The driving mechanism includes a lead screw capable of rotating along its own axis. The lead screw is vertically extended and arranged inside the rear part of the upper box body. The motion mechanism further includes a connecting plate for isolating the driving mechanism from the oil fume inside the upper box body. The lead screw is disposed inside the connecting plate. The motion mechanism further includes a support for supporting the bottom of the lead screw and a screw for connecting the support and the connecting plate. The screw includes an exposed portion partially exposed on one side of the connecting plate facing the inside of the upper box body. It is characterized in that: The oil fume extractor further includes a diversion member capable of receiving and guiding the oil droplets dripping from the exposed portion.

[0007] By providing the diversion member, it is possible to receive and divert the oil droplets dripping from the exposed portion of the screw for fixing the lead screw of the motion mechanism, preventing the oil droplets from dripping downward towards the oil fume extractor.

[0008] In order to be able to receive and divert the oil droplets dripping from the exposed portion of the screw, the diversion member includes a vertical front plate and a bottom plate that gradually inclines downward from front to back. The bottom of the front plate and the front part of the bottom plate are directly or indirectly connected. The front plate is located on the front side of the exposed portion and has a height higher than the exposed portion. The bottom plate is located below the exposed portion to be able to receive the oil droplets dripping from the exposed portion and divert the oil droplets.

[0009] In order to make the oil droplets at the connection between the front plate and the bottom plate not easily condense, the diversion member further includes a transition plate for the smooth transition between the front plate and the bottom plate. The transition plate is in the shape of an arc curved towards the front side.

[0010] In order to be able to better receive the oil droplets, the width of the diversion member is greater than the width of the connecting plate. In the horizontal plane projection, the diversion member covers the connecting plate in the width direction.

[0011] In order to realize the connection between the diversion member and the connecting plate, a countersunk screw hole for setting a countersunk screw for connecting the diversion member and the connecting plate is formed on the front plate.

[0012] According to one aspect of the present utility model, in order to be able to discharge the oil droplets on the diversion member and facilitate the setting of the diversion member, the oil fume extractor further includes a grille for receiving the dripping oil droplets inside the upper box body. The grille includes a filter screen body disposed below the fan system and a filter screen rear plate extending upward from the rear end of the filter screen body. The diversion member is disposed on the filter screen rear plate and extends forward. The rear end of the bottom plate of the diversion member is angularly connected to the filter screen rear plate. A notch for oil leakage is formed between the bottom plate and the filter screen rear plate.

[0013] To reduce the number of components, preferably, the flow guide is integrally formed with the filter screen rear plate.

[0014] According to one aspect of the present utility model, in order to be able to receive and divert the oil dripping from the exposed part of the screw, and to facilitate the assembly of the flow guide, a support plate for supporting the bottom of the connecting plate is provided at the rear side of the upper box body. The support plate extends forward, the flow guide is arranged on the support plate, and the flow guide is correspondingly arranged below the exposed part.

[0015] In order to prevent oil from accumulating at the flanging and to guide the oil to the left and right sides of the connecting plate, there are two screws which are arranged at intervals in the left - right direction. The flow guide includes a first flanging corresponding to the left - hand screw and a second flanging corresponding to the right - hand screw. Both the first flanging and the second flanging are formed by flanging forward from the front side of the support plate. The first flanging gradually inclines downward from front to back and gradually inclines upward from left to right. The second flanging gradually inclines downward from front to back and gradually inclines upward from right to left.

[0016] In order to be able to better receive the oil, the lengths of the first flanging and the second flanging in the front - back direction are longer than the exposed part.

[0017] Preferably, the inclination angles of the first flanging and the second flanging relative to the horizontal plane in the front - back direction are α, and α > 12°. The inclination angles of the first flanging and the second flanging relative to the horizontal plane in the left - right direction are β, and β > 8°. Thus, the oil can be guided to the left and right sides of the connecting plate, so that the oil flows backward along the left and right sides of the connecting plate to the rear side wall of the upper box body.

[0018] To reduce the number of components and further facilitate the assembly of the flow guide, preferably, the flow guide is integrally formed with the support plate.

[0019] Compared with the prior art, the advantages of the present utility model are as follows: By providing the flow guide, the oil dripping from the exposed part of the screw can be received and diverted, preventing the oil from dripping downward towards the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the range hood according to the first embodiment of the present utility model;

[0021] Figure 2 It is a partial rear view of the range hood according to the first embodiment of the present utility model;

[0022] Figure 3 It is a side cross - sectional view of the range hood according to the first embodiment of the present utility model;

[0023] Figure 4For Figure 3 Enlarged view of part I;

[0024] Figure 5 Top cross-sectional view of some components of the range hood according to the first embodiment of the present utility model;

[0025] Figure 6 Schematic diagram of the width of the connecting plate and the width of the flow guide member of the range hood according to the first embodiment of the present utility model;

[0026] Figure 7 Exploded view of the range hood according to the first embodiment of the present utility model;

[0027] Figure 8 Schematic diagram of the inner filter of the range hood according to the first embodiment of the present utility model;

[0028] Figure 9 Schematic diagram of the connecting plate, support plate and flow guide member of the range hood according to the second embodiment of the present utility model;

[0029] Figure 10 Schematic diagram of the inclination angle of the flow guide member of the range hood in the left-right direction according to the second embodiment of the present utility model;

[0030] Figure 11 Schematic diagram of the inclination angle of the flow guide member of the range hood in the front-back direction according to the second embodiment of the present utility model. Detailed implementation manners

[0031] The present utility model will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0032] In the description of the present 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", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It 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 by the present utility model can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0033] Embodiment 1

[0034] See Figures 1 to 3, An oil fume extractor, comprising an upper box body 1, a lower box body 2 at least partially located below the upper box body 1, and a fan system 3 arranged in the upper box body 1.

[0035] See Figures 1 to 8 , The oil fume extractor further comprises a motion mechanism for driving the lower box body 2 to move up and down relative to the upper box body 1. The motion mechanism comprises a driving mechanism in the form of a linear driving module. The driving mechanism comprises a lead screw 41 capable of rotating along its own axis. The motion mechanism further comprises a connecting plate 42 for isolating the driving mechanism from the oil fume inside the upper box body 1. The cross-section of the connecting plate 42 is in a shape of a capital "J". The lead screw 41 is arranged vertically inside the connecting plate 42. A relief hole 12 for placing the connecting plate 42 is formed at the rear side of the upper box body 1.

[0036] The motion mechanism further comprises a support 43 for supporting the bottom of the lead screw 41 and a screw 44 for connecting the support 43 and the connecting plate 42. The screw 44 comprises an exposed part 441 partially exposed on the side of the connecting plate 42 facing the inside of the upper box body 1. There are two screws 44 spaced apart in the left-right direction. A support plate 11 for supporting the bottom of the connecting plate 42 is arranged at the rear side of the upper box body 1, and the support plate 11 extends forward.

[0037] The oil fume extractor further comprises a diversion member 5 capable of receiving and diverting the oil droplets dripping from the exposed part 441. The diversion member 5 comprises a vertical front plate 51 and a bottom plate 52 gradually inclined downward from front to back. Preferably, the inclination angle of the bottom plate 52 is 12°. The bottom of the front plate 51 and the front part of the bottom plate 52 are directly or indirectly connected. The front plate 51 is located in front of the exposed part 441 and has a height higher than that of the exposed part 441. The bottom plate 52 is located below the exposed part 441 to receive the oil droplets dripping from the exposed part 441 and divert the oil droplets. A countersunk screw hole 511 for arranging a countersunk screw connecting the diversion member 5 and the connecting plate 42 is formed on the front plate 51.

[0038] See Figure 4 , In order to make the oil at the connection between the front plate 51 and the bottom plate 52 of the diversion member 5 not easily condense, the diversion member 5 further comprises a transition plate 53 for the smooth transition between the front plate 51 and the bottom plate 52. The transition plate 53 is in an arc shape curved forward. The R value of the transition plate 53 is greater than 10 mm.

[0039] See Figure 6 , The width of the diversion member 5 is greater than the width of the connecting plate 42. The width of the connecting plate 42 is L1, and the width of the diversion member 5 is L2. In order to make the diversion member 5 receive the oil on the connecting plate 42, L2 > L1. Also, in order to make the diversion member 5 block less of the air intake area at the bottom of the oil fume extractor, 0 < L2 - L1 < 5 mm.

[0040] See Figure 5 and Figure 8, the range hood further includes an inner filter screen 6 for receiving the dripping oil from the upper housing 1 (correspondingly, an outer filter screen will be provided at the lower housing 2 or the smoke collecting hood below the lower housing 2). The inner filter screen 6 is arranged at the bottom of the upper housing 1 and includes a filter screen body 62 arranged below the fan system 3 and a filter screen rear plate 61 extending upward from the rear end of the filter screen body 62. The left and right sides and the front side of the filter screen body 61 can also extend upward with a filter screen side plate 63 and a filter screen front plate 64 respectively. The above-mentioned filter screen rear plate 61, filter screen side plate 63 and filter screen front plate 64 constitute the installation part of the filter screen body 62 for arranging the filter screen body 61 in a way that it sinks relative to the upper housing 1 (the filter screen body 61 is lower than the bottom of the upper housing 1). A filter screen rear plate flow guide 5 is formed on the filter screen rear plate 61. The flow guide 5 extends forward from the middle position at the top of the filter screen rear plate 61. The rear end of the bottom plate 52 of the flow guide 5 is angularly connected to the filter screen rear plate 61. Two gaps 7 for leaking oil are formed between the bottom plate 52 and the filter screen rear plate 61 and are opened left and right. The flow guide 5 and the filter screen rear plate 61 are integrally formed. The two left and right gaps 7 enable the oil to flow onto the inner filter screen 6, preventing the oil from accumulating at the inner root of the flow guide plate 5.

[0041] On the one hand, in this embodiment, the screw 44 of the fixed support 43 is isolated from the oil fume environment to a certain extent. On the other hand, even if there is dripping oil on the screw 44, it will drip onto the inner side of the inclined flow guide 5, thus solving the problem of oil dripping from the screw 44. At the same time, since the width of the flow guide 5 is greater than the width of the connecting plate 42, in the horizontal plane projection, the flow guide 5 covers the connecting plate 42 in the width direction, enabling the oil at the root of the connecting plate 42 to flow out along the gap 7 through the inner side of the flow guide 5. And because a large arc transition (transition plate 53) is provided at the root of the flow guide 5, it can also avoid condensed oil droplets by itself.

[0042] Embodiment Two

[0043] See Figures 9 to 11 , in this embodiment, the difference from the above Embodiment One is that the flow guide 5 is formed on the support plate 11, and the two are integrally formed, and the flow guide 5 is correspondingly arranged below the exposed part 441. The left and right sides of the support plate 11 correspond to the left and right sides of the connecting plate 42.

[0044] The flow guide 5 includes a first flanging 54 corresponding to the left screw 44 and a second flanging 55 corresponding to the right screw 44. Both the first flanging 54 and the second flanging 55 are flanged forward from the front side of the support plate 11. The length of the first flanging 54 and the second flanging 55 in the front-rear direction is longer than that of the exposed part 441, so as to be able to receive the oil dripping from the screw 44.

[0045] The first flanging 54 gradually inclines downward from front to back and gradually inclines upward from left to right. The second flanging 55 gradually inclines downward from front to back and gradually inclines upward from right to left. The inclination settings of the first flanging 54 and the second flanging 55 in the left-right direction enable the oil dripping from the screw 44 to flow out of the flanging along the inclination angle and not accumulate inside the flanging.

[0046] See Figures 10 to 11 , the inclination angles of the first flanging 54 and the second flanging 55 relative to the horizontal plane in the front-back direction are α, and preferably α > 12°. The inclination angles of the first flanging 54 and the second flanging 55 relative to the horizontal plane in the left-right direction are β, and β > 8°. Thus, the oil can be guided to the left and right sides of the connecting plate 42, so that the oil flows backward along the left and right sides of the connecting plate 42 to the rear side wall of the upper box body 1.

Claims

1. A range hood, comprising an upper housing (1), a lower housing (2) at least partially located below the upper housing (1), and a fan system (3) arranged in the upper housing (1), the range hood further comprising a motion mechanism for driving the lower housing (2) to rise and fall relative to the upper housing (1), the motion mechanism comprising a drive mechanism in the form of a linear drive module, the drive mechanism comprising a screw (41) capable of rotating along its own axis, the screw (41) extending up and down on the inner side of the rear portion of the upper housing (1) The motion mechanism further comprises a connecting plate (42) for isolating the driving mechanism from the oil smoke in the upper box body (1); the screw rod (41) is arranged on the inner side of the connecting plate (42); the motion mechanism further comprises a support (43) for supporting the bottom of the screw rod (41) and a screw (44) for connecting the support (43) and the connecting plate (42); the screw (44) comprises an exposed portion (441) partially exposed on the side of the connecting plate (42) facing the inner side of the upper box body (1); and the characteristics are: The range hood further comprises a guide member (5) capable of receiving and guiding oil liquid dripping from the exposed portion (441).

2. The range hood according to claim 1, characterized in that: The guide member (5) comprises a vertical front plate (51) and a bottom plate (52) which gradually tilts downward from front to rear, the bottom of the front plate (51) and the front of the bottom plate (52) are directly or indirectly connected, the front plate (51) is located at the front side of the exposed portion (441) and is higher than the exposed portion (441), and the bottom plate (52) is located below the exposed portion (441) and can receive oil dripping from the exposed portion (441) and guide the oil.

3. The range hood according to claim 2, characterized in that: The flow guide (5) further comprises a transition plate (53) for smooth transition between the front plate (51) and the bottom plate (52); the transition plate (53) is in the shape of an arc that bends toward the front side.

4. The range hood according to claim 2, characterized in that: The width of the flow guide (5) is greater than the width of the connecting plate (42); in horizontal plane projection, the flow guide (5) covers the connecting plate (42) in the width direction.

5. The range hood according to claim 2, characterized in that: The front plate (51) is formed with a countersunk screw hole (511) for arranging a countersunk screw for connecting the flow guide (5) and the connecting plate (42).

6. The range hood according to any one of claims 1 to 5, characterized in that: The range hood further comprises an inner filter (6) for receiving dripping oil from the interior of the upper housing (1); the inner filter (6) comprises a filter body (62) arranged below the fan system (3) and a filter rear plate (61) extending upward from the rear end of the filter body (62); the guide member (5) is arranged on the filter rear plate (61) and extends toward the front; the rear end of the bottom plate (52) of the guide member (5) is connected to the filter rear plate (61) at an angle; a notch (7) for oil leakage is formed between the bottom plate (52) and the filter rear plate (61).

7. The range hood according to claim 6, characterized in that: The flow guide (5) and the filter screen rear plate (61) are integrally formed.

8. The range hood according to claim 1, characterized in that: A support plate (11) for supporting the bottom of the connecting plate (42) is arranged on the rear side of the upper box body (1), and the support plate (11) extends toward the front side. The guide member (5) is arranged on the support plate (11), and the guide member (5) is correspondingly arranged below the exposed portion (441).

9. The range hood according to claim 1, characterized in that: The screws (44) are provided with two and are spaced apart in the left-right direction. The flow guide (5) comprises a first flange (54) provided corresponding to the screw (44) on the left side and a second flange (55) provided corresponding to the screw (44) on the right side. The first flange (54) and the second flange (55) are both formed by flanging the front side of the support plate (11) toward the front. The first flange (54) is gradually inclined downward from front to back, and the first flange (54) is gradually inclined upward from left to right. The second flange (55) is gradually inclined downward from front to back, and the second flange (55) is gradually inclined upward from right to left.

10. The range hood according to claim 9, characterized in that: The lengths of the first flange (54) and the second flange (55) in the front-to-back direction are longer than the exposed portion (441).

11. The range hood according to claim 9, characterized in that: The inclination angle of the first flange (54) and the second flange (55) relative to the horizontal plane in the front-to-back direction is α, and α>12°. The inclination angle of the first flange (54) and the second flange (55) relative to the horizontal plane in the left-to-right direction is β, and β>8°.

12. The range hood according to claim 9, characterized in that: The flow guide (5) and the support plate (11) are integrally formed.

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