Range hood

Abstract

The utility model relates to a range hood, which comprises a casing, an air inlet, an air outlet and a fan, the smoke blocking curtain is vertically arranged at the bottom of the machine shell, and the upper portion of the smoke blocking curtain is connected with the machine shell in a sliding mode through a sliding rail assembly; the driving device is connected with the top of the smoke blocking curtain so as to drive the smoke blocking curtain to move in the circumferential direction of the machine shell; the smoke blocking curtain is a curtain body piece which is arranged along the peripheral edge of the bottom of the machine shell in an extending mode and cannot be folded under the driving of the driving device, and the curtain body piece defines a smoke gathering space with an opening in the side portion at the bottom of the machine shell. The smoke blocking device has the advantages that the smoke blocking curtain moves more stably, and the problem of jamming is not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a range hood. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. The range hood can exhaust oil smoke, thereby solving the problem of kitchen air quality and improving people's quality of life. Today, as users have increasingly stringent requirements on appearance, when the size of the range hood tends to be smaller and the installation position gradually moves closer to the upper cabinet, the oil smoke suction port on the range hood is bound to move upward at the same time, which directly leads to the oil smoke generated in the pot during cooking. It takes a longer path to reach the oil smoke suction port on the range hood and be sucked in by it, which will increase the possibility of oil smoke escaping, resulting in a decrease in the oil smoke suction effect of the range hood.

[0003] To this end, the Chinese utility model patent application with application number CN201920169141.4 (authorization announcement number: CN209744462U) discloses a smoke curtain for a range hood and a range hood having the smoke curtain, wherein the smoke curtain for a range hood comprises: a smoke curtain body, which is vertically connected to the outer periphery of the air inlet of the range hood, and a smoke collecting cavity is formed inside the smoke curtain body; a first movable fitting is provided at the upper end of the smoke curtain body, and the first movable fitting is used to form a movable fitting structure with a second movable fitting arranged at the outer periphery of the air inlet, and the smoke curtain body can reciprocate along the outer periphery through the movable fitting structure and can be stored and folded during the movement. The first movable fitting is a plurality of hanging rings connected to the upper end of the smoke curtain body and arranged at intervals, and the plurality of hanging rings can be slidably sleeved on the second movable fitting as a slide rail, and the hanging rings slidably arranged on the slide rail drive the smoke curtain body to unfold or store.

[0004] However, the above-mentioned smoke curtain for range hoods still has certain shortcomings in actual use. The smoke curtain is a foldable curtain structure, and adopts a sliding cooperation method of a plurality of hanging rings and a slide rail. For the straight section of the slide rail, the smoke curtain can basically be opened relatively smoothly, but for the curved section of the slide rail, especially when it moves to the rounded corner position of the slide rail, when the smoke curtain is unfolded from the folded state, the hanging ring will swing left and right, resulting in unstable movement. It is also easy to get stuck due to the interference between the shape and the slide rail, and the noise generated by the collision between the hanging ring and the slide rail is also relatively obvious.

[0005] Therefore, existing range hoods need further improvement. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a range hood with a smoke screen that has a smoother moving process and is less prone to jamming, in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising:

[0008] The casing has an air inlet at the bottom;

[0009] A smoke curtain is vertically arranged at the bottom of the housing, and the upper part of the smoke curtain is slidably connected to the housing through a slide rail assembly;

[0010] A driving device connected to the top of the smoke curtain, thereby driving the smoke curtain to move along the circumference of the housing;

[0011] The smoke barrier curtain is a curtain body member which is arranged along the outer peripheral edge of the bottom of the housing and cannot be folded when driven by the driving device. The curtain body member defines a smoke-collecting space with open sides at the bottom of the housing.

[0012] In order to simplify the structure of the slide rail assembly and to be suitable for connection with the smoke curtain, the slide rail assembly includes:

[0013] A slide rail, fixed relative to the housing and arranged along the outer peripheral edge of the housing;

[0014] There are at least two sliding members, which are arranged in sequence along the length direction of the slide rail, each of which is connected to the upper part of the smoke barrier curtain, and at least one of the sliding members located at the end of the smoke barrier curtain is connected to the driving device.

[0015] In order to achieve sliding cooperation between the sliding member and the sliding rail, the sliding rail includes an annular sliding rail body and a limit stop strip extending upward from the middle position of the top of the sliding rail body, so that the top of the sliding rail forms two step portions on the left and right sides of the limit stop strip. The sliding member is U-shaped as a whole, and has two opposite support arms. The two opposite support arms of the sliding member have relatively extended support columns, and the two support columns are provided with freely rotatable rolling rings, and the two rolling rings are correspondingly placed on the two step portions of the sliding rail.

[0016] In order to reduce the noise generated during the movement of the sliding part and achieve the purpose of silence, the rolling ring is a rubber part.

[0017] In order to connect the smoke barrier curtain to the sliding member, a mounting groove is provided at the bottom of each sliding member for the upper side edge of the smoke barrier curtain to be inserted therein.

[0018] In order to ensure the reliability of the connection between the smoke curtain and the sliding member, the upper side of the smoke curtain is inserted into the installation groove of each sliding member and fixed to the sliding member by glue.

[0019] In order to ensure the stability of the smoke curtain driven by the driving device, the driving device includes:

[0020] At least four sprockets are rotatably disposed at four corners of the housing, and the rotation axes of the sprockets extend vertically;

[0021] A transmission chain is wound around the above-mentioned sprockets and cooperates with the sprockets in transmission;

[0022] The output shaft of the driving motor is connected to one of the sprockets, thereby driving the sprocket to rotate.

[0023] As an improvement, one section of the transmission chain has a first connecting plate that is folded and extended downward, and the first connecting plate is directly or indirectly connected to the smoke barrier curtain.

[0024] Generally speaking, the driving device is hidden in the casing. In order to adapt to this and achieve connection with the smoke curtain, the bottom of the casing is also provided with a clearance opening extending along the circumference of the casing near its outer peripheral edge. The upper part of the smoke curtain is connected to the slide rail assembly through the clearance opening.

[0025] In order to adapt to different cooking states and the shutdown state of the range hood, the smoke curtain has at least the following first state, second state, third state and fourth state as its moving position changes:

[0026] In the first state, the side opening of the smoke curtain faces forward;

[0027] In the second state, the side opening of the smoke curtain faces right;

[0028] In the third state, the side opening of the smoke curtain faces backward;

[0029] In the fourth state, the side opening of the smoke curtain faces leftward.

[0030] In the first state, it can reduce the escape of oil smoke from the left and right sides, and at the same time can be used as a relative position in a non-working state to release a certain amount of kitchen space.

[0031] In the second state, the smoke curtain forms a semi-enclosed structure on the left side, which has a strong ability to collect smoke on the left side and is suitable for the situation where a single stove is used on the left side.

[0032] In the third state, the smoke curtain and the wall form a relatively sealed space with the strongest smoke-collecting ability, which is suitable for situations where a large amount of oil smoke is generated, such as stir-frying.

[0033] In the fourth state, the smoke curtain forms a semi-enclosed structure on the right side, which has a strong ability to collect smoke on the right side and is suitable for the situation where a single stove is used on the right side.

[0034] Compared with the prior art, the utility model has the following advantages: the smoke curtain is a curtain body member extending along the outer peripheral edge of the bottom of the housing and cannot be folded under the drive of the driving device. In this way, the curtain body member can slide smoothly through the guide rail assembly under the drive of the driving device, and is not prone to the problem of jamming caused by the left and right shaking of the retaining ring as in the prior art folding curtain body member. In the preferred embodiment, the smoke curtain is driven by the transmission chain and sprocket in conjunction with the driving device to run more smoothly, and the noise generated is relatively small, which provides users with a quiet and comfortable use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the utility model (the smoke curtain is in the first state);

[0036] Figure 2 This is a three-dimensional structural schematic diagram of a range hood according to an embodiment of the utility model (the smoke screen is in the second state);

[0037] Figure 3 This is a three-dimensional structural schematic diagram of a range hood according to an embodiment of the utility model (the smoke screen is in the third state);

[0038] Figure 4 This is a schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the utility model (the smoke curtain is in the fourth state);

[0039] Figure 5 It is a schematic diagram of the three-dimensional structure of the top of the smoke collecting hood of the range hood according to the embodiment of the utility model;

[0040] Figure 6 A top view of a smoke collecting hood of a range hood according to an embodiment of the utility model;

[0041] Figure 7 for Figure 6 A sectional stereogram cut along the AA direction;

[0042] Figure 8 It is a partial structural schematic diagram of the driving device of an embodiment of the utility model;

[0043] Fig. 9 This is an exploded view of the smoke hood and the driving device of the embodiment of the utility model;

[0044] Fig.10 It is a schematic diagram of the three-dimensional structure of the sliding member according to an embodiment of the utility model. DETAILED DESCRIPTION

[0045] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0046] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0047] Figure 1-Figure 10 A preferred embodiment of the range hood of the utility model is shown. The range hood includes a casing 10 and a centrifugal fan arranged in the casing 10. The casing 10 generally includes a fan frame 11 and a fume hood 12 arranged at the bottom of the fan frame 11. The inner cavity of the fan frame 11 is connected to the inner cavity of the fume hood 12. An air inlet (not shown) is provided at the bottom of the fume hood 12, and external smoke can enter the fume hood 12 through the air inlet. The centrifugal fan is arranged in the fan frame 11. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood 12 through the air inlet. An oil net is also provided at the air inlet of the fume hood 12 for filtering oil smoke.

[0048] The range hood of this embodiment further includes a smoke curtain 21 and a driving device. The smoke curtain 21 is vertically arranged at the bottom of the smoke hood 12, and its material can be a synthetic material that is resistant to high temperatures and grease. The upper part of the smoke curtain 21 is slidably connected to the smoke hood 12 through a slide rail 22 assembly, ensuring that the smoke curtain 21 can move smoothly along the circumference of the smoke hood 12 under the drive of the driving device.

[0049] The driving device and the slide rail 22 assembly are arranged in the smoke hood 12. The bottom of the smoke hood 12 is a square structure. The bottom of the smoke hood 12 is provided with an annular clearance opening 120 at a position adjacent to the outer peripheral edge thereof. The upper part of the smoke curtain 21 passes through the clearance opening 120 and is connected to the slide rail 22 assembly. The slide rail 22 assembly includes a slide rail 22 and a sliding member 23. The slide rail 22 is an annular structure and is fixedly arranged along the outer peripheral edge of the casing 10. The slide rail 22 is sequentially provided with a plurality of upwardly extending connecting brackets 223 in the length direction thereof, which can be used to be fixed to the casing 10. The entirety of the slide rail 22 is vertically opposite to the annular clearance opening 120 of the casing 10, so as to facilitate the natural hanging of the smoke curtain 21.

[0050] The slide rail 22 includes an annular slide rail body 221 and a limit stop bar 222 extending upward from the middle position of the top of the slide rail body 221. Figure 7As shown, the cross section of the slide rail 22 is an inverted T-shape, that is, the top of the slide rail 22 forms two step portions 220 on the left and right sides of the limit stop bar 222. To match it, the sliding member 23 is a U-shaped structure with two opposite arms 231, and the arms 231 are provided with support columns 232 extending laterally toward each other, and the two support columns 232 are both sleeved with freely rotatable roller rings 233. After the slide rail 22 and the slide member 23 are assembled together, the two support columns 232 and the corresponding roller rings 233 of the slide member 23 are placed on the two step portions 220 of the slide rail 22, and can slide along the length direction of the slide rail 22. The roller ring 233 is made of rubber material, which can reduce the noise when the slide member 23 moves.

[0051] In order to ensure a firm connection between the smoke curtain 21 and the sliding member 23 , a mounting groove 234 is provided at the bottom of each sliding member 23 , into which the upper side of the smoke curtain 21 is inserted and fixed with glue.

[0052] See also Figure 5 and Figure 8 The driving device includes four sprockets 31, a transmission chain 32 and a driving motor 34. The sprockets 31 are rotatably arranged at the four corners of the housing 10, and the axis of each sprocket 31 extends vertically. The transmission chain 32 is wound around the four sprockets 31 to form a linkage, and the rotation of the sprockets 31 can drive the transmission chain 32 to move circumferentially. A first connecting plate 33 that is folded and extended downward is provided on one section of the transmission chain 32. Correspondingly, a second connecting plate 235 extending upward is provided on the sliding member 23 (specifically, it can be the sliding member 23 located at the end position of the length direction of the smoke curtain 21), and the first connecting plate 33 and the second connecting plate 235 can be connected by screws or other connecting members. The output shaft of the driving motor 34 is connected to a sprocket 31, and the rotation of the sprocket 31 drives the transmission chain 32 to move and then drives the smoke curtain 21 to move to different positions. It can be imagined that each sliding member 23 of the slide rail 22 assembly can be connected to the different positions of the transmission chain 32, thereby ensuring that the movement of the smoke curtain 21 is synchronized with the transmission of the chain.

[0053] The range hood is generally also provided with a state detection device (not shown) for detecting the cooking status on the left and right sides, such as a fume concentration sensor or a visual detection device that can identify the amount of fume on the left and right sides. The state detection device and the drive device for driving the smoke curtain 21 to move can be electrically connected to the controller of the range hood, so that the controller can control the action of the drive device according to the cooking status signal transmitted by the state detection device, thereby driving the smoke curtain 21 to move to a position that matches the cooking status. Specifically, in order to adapt to different cooking states and the shutdown state of the range hood, the smoke curtain 21 has at least the following first state, second state, third state and fourth state as its moving position changes:

[0054] like Figure 1 As shown, in the first state: the side opening of the smoke curtain faces forward. In this state, the smoke curtain 21 mainly plays the role of blocking the escape of oil smoke from the left and right sides, and can also be used as a setting position in the non-working state to release a certain amount of kitchen space.

[0055] like Figure 2 As shown, in the second state: the side opening of the smoke curtain faces right. In this state, the smoke curtain 21 forms a semi-enclosed structure on the left side, which has a strong smoke-collecting ability for the left side oil smoke, and is suitable for the situation where a single stove on the left side is used.

[0056] like Figure 3 As shown, in the third state: the side opening of the smoke curtain faces backward. In this state, the smoke curtain 21 and the wall form a relatively sealed space with the strongest smoke collection ability, which is suitable for situations where a large amount of oil smoke is generated, such as stir-frying.

[0057] like Figure 4 As shown, in the fourth state: the side opening of the smoke curtain faces left. In this state, the smoke curtain 21 forms a semi-enclosed structure on the right side, which has a strong smoke-collecting ability on the right side, and is suitable for the situation where a single stove on the right side is used.

[0058] The user can adjust the state of the smoke curtain 21 according to different cooking needs. For example, when stir-frying, the smoke curtain 21 can be adjusted to the third state to obtain the best smoke collection effect. In the non-working state, the smoke curtain 21 can be adjusted to the first state to free up kitchen space. Through the adjustment of the driving device, the user can easily switch the state of the smoke curtain 21 to meet different usage needs.

[0059] The range hood of this embodiment is uniquely designed. Through the ingenious design of the slide rail 22 assembly and the drive device, the multi-state adjustment of the smoke curtain 21 is realized, which improves the smoke collection effect and the convenience of use. At the same time, the rubber roller 233 reduces the noise during the sliding process and improves the user experience.

Claims

1. A range hood, comprising: The casing (10) has an air inlet at the bottom; A smoke curtain (21) is vertically arranged at the bottom of the housing (10), and the upper part of the smoke curtain (21) is slidably connected to the housing (10) via a slide rail (22) assembly; A driving device connected to the top of the smoke barrier curtain (21), thereby driving the smoke barrier curtain (21) to move along the circumferential direction of the housing (10); The characteristic is that the smoke barrier curtain (21) is a curtain body member which is arranged along the outer peripheral edge of the bottom of the casing (10) and cannot be folded when driven by the driving device. The curtain body member defines a smoke-collecting space with an open side at the bottom of the casing (10).

2. The range hood according to claim 1, characterized in that: The slide rail (22) assembly comprises: A slide rail (22) is fixed relative to the housing (10) and arranged along the outer peripheral edge of the housing (10); There are at least two sliding members (23) arranged in sequence along the length direction of the slide rail (22), each of the sliding members (23) is connected to the upper part of the smoke barrier curtain (21), and at least one of the sliding members (23) located at the end of the smoke barrier curtain (21) is connected to the driving device.

3. The range hood according to claim 2, characterized in that: The slide rail (22) comprises an annular slide rail body (221) and a limit stop bar (222) extending upward from the middle position of the top of the slide rail body (221), so that the top of the slide rail (22) forms two step portions (220) on the left and right sides of the limit stop bar (222); the sliding member (23) is U-shaped as a whole, and has two opposite support arms (231); the two opposite support arms (231) of the sliding member (23) have relatively extending support columns (232); the two support columns (232) are both provided with freely rotatable rolling rings (233); the two rolling rings (233) are correspondingly placed on the two step portions (220) of the slide rail (22).

4. The range hood according to claim 3, characterized in that: The rolling ring (233) is a rubber piece.

5. The range hood according to claim 2, characterized in that: The bottom of each sliding member (23) is provided with a mounting groove (234) for inserting the upper side edge of the smoke barrier curtain therein.

6. The range hood according to claim 5, characterized in that: After the upper side edge of the smoke barrier curtain is inserted into the mounting groove (234) of each sliding member (23), it is fixed to the sliding member (23) by glue.

7. The range hood according to any one of claims 1 to 6, characterized in that: The driving device comprises: At least four sprockets (31) are rotatably disposed at four corners of the housing (10), and the rotation axes of the sprockets (31) extend vertically; A transmission chain (32) is wound around the sprockets (31) and is in transmission cooperation with the sprockets (31); The output shaft of the driving motor (34) is drivingly connected to one of the sprockets (31), thereby driving the sprocket (31) to rotate.

8. The range hood according to claim 7, characterized in that: One section of the transmission chain (32) is provided with a first connecting plate (33) that is folded and extended downwards, and the first connecting plate (33) is directly or indirectly connected to the smoke barrier curtain (21).

9. The range hood according to any one of claims 1 to 6, characterized in that: The bottom of the casing (10) is provided with a clearance opening (120) extending along the periphery of the casing (10) adjacent to its outer peripheral edge, and the upper portion of the smoke barrier curtain (21) passes through the clearance opening (120) and is connected to the slide rail (22) assembly.

10. The range hood according to any one of claims 1 to 6, characterized in that: The smoke barrier curtain (21) has at least the following first state, second state, third state and fourth state as its moving position changes: In the first state, the side opening of the smoke curtain faces forward; In the second state, the side opening of the smoke curtain faces right; In the third state, the side opening of the smoke curtain faces backward; In the fourth state, the side opening of the smoke curtain faces leftward.

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