Range hood

Abstract

The utility model relates to a range hood, which comprises: a housing, the interior of which is hollow to form a chamber with an air inlet and an air outlet; the fan system is arranged in the shell and is used for driving external oil fume to be sucked into the cavity from the air inlet and discharged from the air outlet; the electric appliance box is arranged in the machine shell, and a circuit board in the electric appliance box is electrically connected with the fan system; the electric appliance box is provided with a box body and a box cover arranged at an opening of the box body, the box cover can move to an opening position relatively far away from the box body under the action of a driving mechanism, at the moment, the opening of the box body is opened, and the space in the box body is communicated with the outside; and at the moment, the box cover covers the opening of the box body to close the opening. The heat dissipation performance of the circuit board can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a range hood. Background Technology

[0002] Existing range hoods rely on the operation of an internal fan system to create a negative pressure zone, and the oil fumes in the kitchen are exhausted outdoors after passing through the range hood under atmospheric pressure.

[0003] With the improvement of performance indicators such as maximum air volume and maximum static pressure, the power of existing range hoods is getting higher and higher. During operation, the temperature of the power board is getting higher and higher, and excessive temperature rise of the power board can cause abnormal operation of the range hood.

[0004] In current range hood designs, the power supply board is usually protected by a metal electrical box and is fixed to the range hood casing. Although this provides a high level of safety, it also results in poor heat dissipation. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a range hood that can improve the heat dissipation performance of the circuit board, based on the current state of the technology.

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

[0007] The casing is hollow inside, forming a chamber with an air inlet and an air outlet;

[0008] A fan system is installed inside the casing to drive external oil fumes into the chamber through the air inlet and out through the air outlet.

[0009] An electrical box is located inside the housing, and the circuit board inside the electrical box is electrically connected to the fan system;

[0010] Its features are:

[0011] The electrical box has a box body and a lid located at the opening of the box body. The lid can be moved to the following position under the action of a driving mechanism:

[0012] At a position relatively far from the box, the box is open, and the space inside the box connects to the outside.

[0013] The lid is positioned relatively close to the closed position of the box body, at which point it covers the open part of the box body and closes the opening.

[0014] Thus, when the circuit board temperature is too high, the drive mechanism can drive the cover to the open position. At this time, the box opening is open, and the space inside the box is connected to the outside, allowing the electrical box to dissipate heat. When the circuit board temperature drops, the drive mechanism can drive the cover to the closed position and close the box opening.

[0015] Preferably, the casing has an opening on its wall, and the box body is located inside the opening. When in the open position, the box lid is located outside the opening. In this way, the box body can be opened to the outside through the opening.

[0016] Preferably, the side of the lid facing the box body is designated as the back side. This back side has an annular baffle extending towards the box body and equipped with ventilation holes. In the closed position, the annular baffle is retracted within the box body. In the open position, at least the portion of the annular baffle near the lid extends beyond the opening. At this time, the ventilation holes on the annular baffle connect the outside world with the space inside the box body. The annular baffle with ventilation holes ensures heat dissipation from the electrical box while also acting as a shield to prevent foreign objects from entering the electrical box.

[0017] Preferably, there are multiple heat dissipation holes, which are spaced apart on the annular baffle.

[0018] Preferably, in the open position, the annular baffle is located within the opening, at least at the edge of the lid. This ensures that the annular baffle completely covers the area between the lid and the opening.

[0019] In the above scheme, preferably, the opening is located on the top wall of the housing, the box body is located below the top wall of the housing with the opening facing upwards, and the box cover can move up and down relative to the box body to the open position or the closed position under the action of the driving mechanism, and the box cover is located above the top wall of the housing when it is in the open position.

[0020] Furthermore, a portion of the top wall of the housing is recessed downwards to form a cavity, and the aforementioned opening is provided in the center of the bottom wall of the cavity;

[0021] When closed, the lid is supported on the outer periphery of the bottom wall of the cavity, and the edge of the lid is located outside the edge of the opening.

[0022] The aforementioned drive mechanism can employ existing telescopic mechanisms such as electric cylinders and hydraulic cylinders. Preferably, the drive mechanism includes:

[0023] At least two vertically arranged support bars are spaced apart circumferentially around the periphery of the opening. The upper end of each support bar is connected to the box cover, and the lower end of each support bar passes through the top wall of the housing and is located inside the housing.

[0024] The power component is used to drive the support bars to move up and down synchronously.

[0025] In order to drive each support bar to move up and down synchronously, the support bar is further defined as a first rack with multiple teeth in the length direction, and each first rack is provided with a matching first gear.

[0026] The power component includes a motor, the motor shaft extends horizontally and is connected to one of the first gears, and the motor shaft is connected to the other first gears through a transmission component.

[0027] Furthermore, there are four support bars arranged in a rectangular array, and they are arranged in pairs on the front and rear sides of the opening; the first gears corresponding to the two support bars in the first group are connected by a first rotating shaft extending left and right, and the first gears corresponding to the two support bars in the second group are connected by a second rotating shaft extending left and right. The first rotating shaft is the aforementioned motor rotating shaft, and the motor rotating shaft and the second rotating shaft are connected by a transmission component having a second rack and a second gear. The second rack extends front and rear, and there are two second gears, which are respectively located on their respective first rotating shafts and second rotating shafts and mesh with the second rack.

[0028] Compared with the prior art, the advantages of this utility model are as follows: when the circuit board temperature is too high, the drive mechanism can drive the box cover to move to the open position. At this time, the box opening is open, and the space inside the box is connected to the outside, so that the electrical box can dissipate heat; when the circuit board temperature drops, the drive mechanism can drive the box cover to move to the closed position and close the box opening. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of the present utility model (with the lid in the closed position);

[0030] Figure 2 for Figure 1 Longitudinal sectional view of a center-draft range hood;

[0031] Figure 3 This is a schematic diagram of the drive mechanism and the lid of the box according to an embodiment of the present utility model (the lid is in the closed position);

[0032] Figure 4 for Figure 3 A partial structural diagram of the central drive mechanism and the box cover (the first and second protective sleeves are omitted);

[0033] Figure 5 This is a schematic diagram of the structure of a range hood according to an embodiment of the present utility model (the lid is in the open position);

[0034] Figure 6 for Figure 5 Longitudinal sectional view of a center-draft range hood;

[0035] Figure 7 for Figure 6Enlarged view of part A in the middle. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] like Figures 1-7 As shown, this is a preferred embodiment of a range hood according to the present invention. The range hood includes a housing 1, a fan system 2, an electrical box 3, and a drive mechanism 4.

[0038] With the side of the range hood facing the user as the front side, the interior of the casing 1 is hollow, forming a chamber 10. The front wall of the chamber 10 slopes forward from bottom to top and has an air inlet 10a for external cooking fumes to enter. The top wall of the chamber 10 has an air outlet 10b. A centrifugal fan is installed inside the chamber 10 as a fan system 2, used to drive external cooking fumes into the chamber 10 through the air inlet 10a and out through the air outlet 10b. In this embodiment, a rectangular cavity 12 is formed by a partial downward recess in the top wall of the chamber 10, and a rectangular opening 11 through which a pipe penetrates the wall thickness is provided in the center of the bottom wall of the cavity 12.

[0039] Electrical box 3 is located inside housing 1, and circuit board 30 inside electrical box 3 is electrically connected to fan system 2. Electrical box 3 has a box body 31 with an open top and a box cover 32 located at the opening of box body 31. Box body 31 is located below the top wall of chamber 10, and the opening of box body 31 is opposite to opening 11. Box cover 32 is located above opening 11, and the back (i.e., lower surface) of box cover 32 has an annular baffle 33 extending downward toward box body 31 and having heat dissipation holes 330. The shape formed by the annular baffle 33 is rectangular, consistent with the shape of opening 11. There are multiple heat dissipation holes 330, which are spaced apart on the annular baffle 33. Under the action of drive mechanism 4, box cover 32 can move up and down relative to box body 31.

[0040] At a position relatively far from the open position of the housing 31, the lid 32 is located above the top wall of the casing 1, the upper part of the annular baffle 33 extends upwards to the outside of the opening 11, and the lower edge of the annular baffle 33 is located inside the opening 11. At this time, the housing 31 is open, and the heat dissipation holes 330 on the annular baffle 33 connect the outside to the space inside the housing 31; please refer to [link / reference] for details. Figures 5-7 It helps dissipate heat from the electrical box;

[0041] At a position relatively close to the closed position of the box body 31, the lid 32 is supported on the outer periphery of the bottom wall of the recess 12, with the edge of the lid 32 located outside the edge of the opening 11. The lid 32 closes the top opening of the box body 31, and the annular baffle 33 is retracted inside the box body 31. Please refer to [link / reference] for details. Figure 1 , 2 .

[0042] like Figure 3 , 4 As shown, in order to drive the lid 32 to move up and down, the drive mechanism 4 includes:

[0043] Four vertically arranged support bars 41, each of which is a first rack with multiple teeth along its length, and each first rack is equipped with a matching first gear 42; the four support bars 41 are arranged in a rectangular array, with two support bars 41 arranged in pairs on the front and rear sides of the periphery of the opening 11, and the first gears 42 corresponding to the two support bars 41 in the first group are connected by a first rotating shaft 44 extending left and right, and the first gears 42 corresponding to the two support bars 41 in the second group are connected by a second rotating shaft 45 extending left and right. The first rotating shaft 44 and the second rotating shaft 45 are connected by a transmission component with a second rack 46 and a second gear 47. The second rack 46 extends front and back and is located outside the box body 31, and there are two second gears 47, which are coaxially arranged on their respective first rotating shaft 44 and second rotating shaft 45 and mesh with the second rack 46; at the same time, the upper end of each support bar 41 is connected to the box cover 32, and the lower end of each support bar 41 passes through the outer periphery of the bottom wall of the cavity 12 and is located inside the casing 1 and outside the box body 31;

[0044] A power component, namely a motor 43, drives each support bar 41 to move up and down synchronously. The motor 43's shaft is the aforementioned first shaft 44. When the motor 43's shaft rotates, it sequentially passes through the second gear 47 on the motor 43's shaft, the second rack 46, and the second gear 47 on the second shaft 45, causing the second shaft 45 to rotate synchronously with the motor 43's shaft. This, in turn, causes the first gear 42 on the first and second shafts to rotate synchronously, driving the four support bars 41 to move synchronously. Since the upper ends of the four support bars 41 support the four corners of the cover 32, the cover 32, along with the annular baffle 33, can move up and down stably.

[0045] In this embodiment, as Figure 2 , 3 As shown in Figure 7, to further improve structural stability, each first gear 42 is provided with a first protective sleeve 48 on its outer periphery. The first protective sleeve 48 is fixed relative to the housing 1. The first protective sleeve 48 is provided with a first through hole for the corresponding first rotating shaft 44 or second rotating shaft 45 to pass through and a second through hole 481 for the corresponding support bar 41 to pass through. Each second gear 47 is provided with a second protective sleeve 49 on its outer periphery. The second protective sleeve 49 is fixed relative to the housing 1. The second protective sleeve 49 is provided with a through hole for the corresponding first rotating shaft 44 or second rotating shaft 45 to pass through.

[0046] Meanwhile, in this embodiment, the circuit board 30 inside the housing 31 is integrated with an existing temperature detection device to detect temperature changes and control the operation of the drive mechanism 4.

[0047] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only 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.

Claims

1. A range hood, comprising: The housing (1) has a hollow interior forming a chamber (10) with an air inlet (10a) and an air outlet (10b); A fan system (2) is installed inside the casing (1) and is used to drive external oil fumes into the chamber (10) through the air inlet (10a) and out through the air outlet (10b). An electrical box (3) is located inside the housing (1), and the circuit board (30) inside the electrical box (3) is electrically connected to the fan system (2); Its features are: The electrical box (3) has a box body (31) and a box cover (32) located at the opening of the box body (31). The box cover (32) can be moved to the following position under the action of the drive mechanism (4): At a position relatively far from the box (31), the box (31) is open, and the space inside the box (31) is connected to the outside. At a position relatively close to the closed position of the box body (31), the lid (32) covers the open part of the box body (31) and closes the opening.

2. The range hood according to claim 1, characterized in that: The casing (1) has an opening (11) on its wall, and the box body (31) is located inside the opening (11). When the box is in the open position, the box cover (32) is located outside the opening (11).

3. The range hood according to claim 2, characterized in that: The side of the box cover (32) facing the box body (31) is called the back side. The back side is provided with an annular baffle (33) extending towards the box body (31) and having heat dissipation holes (330). When closed, the annular baffle (33) is retracted into the box body (31). When open, at least the part of the annular baffle (33) near the box cover (32) extends out of the opening (11). At this time, the heat dissipation holes (330) on the annular baffle (33) connect the outside world with the space inside the box body (31).

4. The range hood according to claim 3, characterized in that: There are multiple heat dissipation holes (330), which are spaced apart on the annular baffle (33).

5. The range hood according to claim 3, characterized in that: When in the open position, the annular baffle (33) is located at least at the edge of the cover (32) within the opening (11).

6. The range hood according to claim 2, characterized in that: The opening (11) is located on the top wall of the housing (1), the box body (31) is open and located below the top wall of the housing (1), and the box cover (32) can move up and down relative to the box body (31) to the open position or the closed position under the action of the drive mechanism (4), and the box cover (32) in the open position is located above the top wall of the housing (1).

7. The range hood according to claim 6, characterized in that: The top wall of the housing (1) is partially recessed downward to form a cavity (12), and the bottom wall of the cavity (12) is provided with the above-mentioned opening (11). When closed, the lid (32) is supported on the outer periphery of the bottom wall of the cavity (12), and the edge of the lid (32) is located outside the edge of the opening (11).

8. The range hood according to claim 6, characterized in that: The drive mechanism (4) includes: At least two vertically arranged support bars (41) are spaced apart around the opening (11) in the circumferential direction. The upper end of each support bar (41) is connected to the box cover (32), and the lower end of each support bar (41) passes through the top wall of the housing (1) and is located inside the housing (1). The power component is used to drive each support bar (41) to move up and down synchronously.

9. The range hood according to claim 8, characterized in that: The support bar (41) is a first rack with multiple teeth in the length direction, and each first rack is provided with a matching first gear (42); The power component includes a motor (43), the motor (43) shaft extends horizontally and is connected to one of the first gears (42), and the motor (43) shaft is connected to the other first gears (42) through a transmission component.

10. The range hood according to claim 9, characterized in that: There are four support bars (41), arranged in a rectangular array, and arranged in pairs on the front and rear sides of the opening (11); the first gears (42) corresponding to the two support bars (41) in the first group are connected by the first rotating shaft (44) extending left and right, and the first gears (42) corresponding to the two support bars (41) in the second group are connected by the second rotating shaft (45) extending left and right. The first rotating shaft (44) is the rotating shaft of the motor (43) mentioned above, and the rotating shaft of the motor (43) and the second rotating shaft (45) are connected by a transmission component with a second rack (46) and a second gear (47). The second rack (46) extends back and forth, and there are two second gears (47) respectively located on their respective first rotating shaft (44) and second rotating shaft (45), and they mesh with the second rack (46).

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