A range hood

Abstract

The utility model discloses a kind of range hood, comprising: upper box body assembly;Air inlet body, which is movably connected with upper box body assembly and can move relative to upper box body assembly, the air inlet body can be at least partially lower than the bottom of upper box body assembly and exposed to the state of upper box body assembly;And movement mechanism, the movement mechanism includes first drive mechanism, the first drive mechanism is electric push rod, the output end of the first drive mechanism can be up and down telescopic and connect with the rear side end of air inlet body;The range hood further includes a roller for wall surface fitting with the range hood installation, the roller at least partially exceeds the rear side of air inlet body, the rotary axis of the roller extends along the left-right direction of range hood.

Description

Technical Field

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

[0002] Chinese cooking produces a lot of oil fumes. To maintain a clean kitchen environment and protect human health, range hoods have become an indispensable appliance in modern family kitchens. As the usage rate of range hoods increases, people are paying more and more attention to their fume extraction efficiency. If the distance between the range hood's air inlet and the area where the fumes are generated is large, the fume extraction path is longer, and the extraction time is increased, making it easier for fumes to escape during cooking. On the other hand, if the installation height of the range hood is lowered and the air inlet is placed as close to the source of the fumes as possible, the negative pressure will expand downwards, which can improve the fume extraction efficiency, but it will result in a smaller cooking space. The cook's head may accidentally hit the fume hood. In addition, a lower installation height will also affect the view and the overall appearance of the kitchen.

[0003] To address this, a lift-type range hood has been invented, where the air intake can be raised and lowered; it descends when the hood is on and rises when it is off. For example, Chinese Patent Application No. 201821250086.3 discloses a range hood with a movable smoke hood, which includes a main smoke hood and a movable smoke hood. The main smoke hood has a main smoke chamber inside, and the upper part of the movable smoke hood extends into the main smoke hood. The movable smoke hood has a movable smoke chamber communicating with the main smoke chamber, and a movable smoke outlet is provided on the outer surface of the movable smoke hood, communicating with the movable smoke chamber. The movable smoke hood and the main smoke hood move up and down and swing in coordination.

[0004] This type of range hood features a rotating and lifting movable smoke hood, with the hinge point between the movable smoke collection hood and the main smoke hood sliding along a groove. During operation, the movable smoke collection hood, driven by an electric push rod, remains in contact with the wall due to its own weight. However, this type of movement has the following problems:

[0005] 1. The center of gravity of the mobile smoke hood is constantly changing during the movement. The horizontal component of the force it exerts on the wall causes the electric push rod to bear radial force, which may lead to increased wear on the push rod, abnormal noise, and reduced service life.

[0006] 2. The movable smoke hood is in constant hard contact with the wall, and the damping fluctuation during the movement will be large, which may cause the movement speed to be uneven, the opening and closing to be incomplete, or even damage to the wall.

[0007] Therefore, further improvements are needed. Utility Model Content

[0008] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a range hood that improves the radial force on the electric push rod, extends its service life, reduces the friction between the moving air intake and the wall, and improves the stability of movement.

[0009] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0010] Upper housing assembly;

[0011] An air inlet body, which is movably connected to the upper housing assembly and can move relative to the upper housing assembly, wherein the air inlet body can be positioned at least partially below the bottom of the upper housing assembly and exposed above the upper housing assembly; and

[0012] The motion mechanism includes a first drive mechanism, which is an electric push rod. The output end of the first drive mechanism can extend and retract vertically and is connected to the rear end of the air inlet.

[0013] Its features are:

[0014] The range hood also includes rollers for mounting to the wall, the rollers extending at least partially beyond the rear side of the air inlet body, and the axis of rotation of the rollers extending in the left-right direction of the range hood.

[0015] By incorporating rollers, even if the air intake unit experiences radial force on the electric push rod due to changes in its center of gravity during movement, the rollers contact the wall where the range hood is installed, thus offsetting the radial force generated during the air intake unit's movement. The electric push rod remains vertical throughout its extension and retraction, eliminating potential radial force issues. Furthermore, the rollers prevent direct hard contact between the air intake unit and the wall, resulting in less damping fluctuations during movement and preventing issues such as large speed variations, incomplete opening and closing, abnormal noises, or even wall damage.

[0016] Furthermore, the output end of the first drive mechanism is connected to the bottom of the air inlet body, and the roller is located at the bottom of the air inlet body. This allows the roller to play a role throughout the entire movement of the air inlet body.

[0017] Furthermore, the output end of the first drive mechanism is connected to the middle position of the air inlet body along the left-right direction of the range hood, and the rollers are two in number and respectively located near the left and right sides of the air inlet body. This allows the left and right sides of the air inlet body to move smoothly.

[0018] Furthermore, regarding the movable connection between the air inlet body and the upper housing assembly, preferably, the motion mechanism further includes a first transmission mechanism. The first transmission mechanism includes a connector disposed on the air inlet body and a slide groove disposed within the upper housing assembly. The connector engages with the slide groove, allowing the connector to slide back and forth along the slide groove and to rotate relative to the slide groove. The axis of rotation of the connector extends along the left-right direction of the range hood. By restricting the trajectory of the air inlet body through the slide groove, the operation of the air inlet body can be made smooth.

[0019] Furthermore, the bottom surface of the upper housing assembly is provided with an opening for the air inlet to enter and exit, the connector is located at the front end of the air inlet, and the sliding groove is located above the opening. This allows the air inlet to be completely retracted into the upper housing assembly when the range hood is turned off.

[0020] Furthermore, to better capture smoke, the range hood also includes a smoke baffle, which is installed at the bottom of the upper housing assembly and can be flipped relative to the upper housing assembly.

[0021] Furthermore, to facilitate the rotation of the smoke baffle, the motion mechanism also includes a second drive mechanism and a second transmission mechanism. The second transmission mechanism includes a first link, a second link, and a third link. The first link is driven to rotate by the second drive mechanism. One end of the second link is rotatably connected to the first link, and the other end of the second link is rotatably connected to the third link. The third link is rotatably connected to the inner side of the bottom surface of the upper housing assembly and is also fixed to the smoke baffle. The rotation axes at the rotational connections of the first link, the second link, and the third link all extend along the left-right direction of the range hood.

[0022] Furthermore, the second drive mechanism is a motor, which is mounted inside the upper housing assembly via a mounting bracket. The output end of the second drive mechanism passes through the mounting bracket and connects to the first connecting rod. This stabilizes the position of the output end of the second drive mechanism, enabling it to drive the first connecting rod.

[0023] Furthermore, a first smoke inlet is formed on the front of the air inlet body, which is exposed on the bottom surface of the upper housing assembly; the bottom surface of the upper housing assembly is provided with an opening for the air inlet body to enter and exit, and a second smoke inlet, the second smoke inlet being located in front of the opening, and the baffle plate can open and close the second smoke inlet. This allows for full utilization of the bottom surface of the upper housing assembly and the front of the air inlet body when the range hood is turned on, creating a larger air intake area.

[0024] Preferably, the bottom surface of the upper housing assembly is provided with an opening for the air inlet to enter and exit.

[0025] Compared with existing technologies, the advantages of this invention are as follows: By incorporating rollers, even if the air intake body experiences radial force on the electric push rod due to changes in its center of gravity during movement, the rollers can contact the wall where the range hood is installed, thus offsetting the radial force generated during the air intake body's movement. The electric push rod remains vertical throughout its extension and retraction, eliminating the potential radial force problem. Furthermore, the rollers prevent direct hard contact between the air intake body and the wall, resulting in less damping fluctuations during movement and preventing large speed changes, incomplete opening and closing, abnormal noises, or even wall damage. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the range hood in the off state according to an embodiment of the present utility model;

[0027] Figure 2 This is a schematic diagram of the closed state of the range hood according to an embodiment of the present utility model (viewed from back to front);

[0028] Figure 3 This is a cross-sectional view of the range hood in the closed state according to an embodiment of the present utility model;

[0029] Figure 4 This is a schematic diagram of the concealed air inlet and part of the upper housing assembly of the range hood according to an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram of the air inlet, smoke baffle, and their movement mechanism of the range hood according to an embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram of the range hood in the open state according to an embodiment of the present utility model;

[0032] Figure 7 This is a cross-sectional view of the range hood in the open state according to an embodiment of the present utility model. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0035] See Figures 1 to 7 A range hood includes an upper housing assembly 1, an air inlet 2, and a smoke baffle 3.

[0036] The upper housing assembly 1 includes an outer housing 11 and a fan frame 12 connected to the outer housing 11. The lower end of the fan frame 12 may be partially located inside the outer housing 11, and the fan frame 12 is used to house a fan (not shown).

[0037] The upper housing assembly 1 can be installed inside the kitchen cabinet. Since the width of the fan frame 12 usually needs to be compatible with the width of the fan, the fan frame 12 does not need to be large. However, the air inlet 2 needs to be larger to accommodate a standard household double burner. For these reasons, the upper housing assembly 1 is divided into an outer housing 11 and a fan frame 12. If the optimization of air intake efficiency is not considered, an integrated upper housing assembly 1 can also be used.

[0038] The air inlet 2 has a first smoke inlet 21 formed on its front side, which is movable relative to the upper housing assembly 1, thus having a first state and a second state. See also Figure 1 and Figure 3 When the air inlet 2 is in the first state, at least part of the air inlet 2, such as at least the front end, is hidden and housed within the upper housing assembly 1, and is located below the fan. In this embodiment, the air inlet 2 is completely housed within the upper housing assembly 1 at this time; see also Figure 6 and Figure 7When the air inlet 2 is in the second state, the air inlet 2 is at least partially below the bottom of the upper housing assembly 1 and exposed above the upper housing assembly 1, and the first smoke inlet 21 is below the bottom surface of the upper housing assembly 1 and exposed above the upper housing assembly 1. In this embodiment, the first smoke inlet 21 is almost completely exposed. The "front" of the air inlet 2 mentioned above refers to the side of the air inlet 2 facing the user when it is in the second state.

[0039] Alternatively, the air inlet 2 can also be a plate, which, in the second state, is at least partially located below the upper housing assembly 1, so that the fumes can surround the periphery of the air inlet 2 or rise from the front side of the air inlet 2 and enter the interior of the upper housing assembly 1 through the opening 13 at the bottom of the upper housing assembly 1 as described below.

[0040] The bottom surface of the upper housing assembly 1 gradually slopes downward from front to back, and the bottom surface has an opening 13 for the air inlet 2 to enter and exit. The bottom surface may also have a second smoke inlet 14, which is located in front of the opening 13. When the air inlet 2 is in the first state, the front of the air inlet 2 can be flush with the edge of the opening 13. When the air inlet 2 is in the second state, the front of the air inlet 2 is exposed in the opening 13, and there can be a certain gap between its front end and the front edge of the opening 13.

[0041] The smoke baffle 3 is installed at the bottom of the upper housing assembly 1 (outer housing 11) and can be rotated relative to the upper housing assembly 1. See also Figure 6 and Figure 7 When the range hood is turned on, and the air inlet 2 is in its second state, the smoke baffle 3 opens the second smoke inlet 14, forming a smoke-collecting chamber Q between the smoke baffle 3 and the front side of the air inlet 2. This allows the first smoke inlet 21 to move downwards and the smoke-collecting area to increase, ensuring better smoke extraction during operation. (See also...) Figure 1 and Figure 3 When the range hood is turned off, and the air inlet 2 is in the first state, the baffle 3 covers the second smoke inlet 14 and closes the second smoke inlet 14. Optionally, the baffle 3 can be lengthened so that the first smoke inlet 21 of the air inlet 2 can also be closed when the second smoke inlet 14 is closed.

[0042] The range hood also includes a motion mechanism, comprising a first drive mechanism 41, a second drive mechanism 42, a first transmission mechanism, and a second transmission mechanism. In this embodiment, the first drive mechanism 41 is an electric push rod, installed inside the upper housing assembly 1, with its output end connected to the air inlet 2, thereby driving the air inlet 2 to move relative to the upper housing assembly 1. In this embodiment, the second drive mechanism 42 is a motor, installed inside the upper housing assembly 1 (outer housing 11), with its output end connected to the smoke baffle 3, thereby driving the smoke baffle 3 to rotate relative to the upper housing assembly 1. When moving from a closed state to an open state, the smoke baffle 3 rotates forward.

[0043] The first transmission mechanism includes a connector 431 disposed on the air inlet body 2 and a slide groove 432 disposed within the upper housing assembly 1. Preferably, the slide groove 432 is disposed within the outer housing 11, and may be located above the opening 13, so that the air inlet body 2 can be completely housed within the upper housing assembly 1. Furthermore, preferably, the inclined direction is consistent with the bottom surface of the upper housing assembly 1. The connector 431 cooperates with the slide groove 432, so that the connector 431 can slide along the slide groove 432 and rotate relative to the slide groove 432. The first transmission mechanism may have two sets, respectively disposed on the left and right sides of the air inlet body 2. The connector 431 may be an integral part of the air inlet body 2 or an independent part fixed to the air inlet body 2. The rotation axis of the connector 431 extends along the left-right direction of the range hood.

[0044] That is, the air inlet 2 swings up and down relative to the upper housing assembly 1. Thus, the first drive mechanism 41 is rotatably connected to the mounting point of the upper housing assembly 1, and the output end of the first drive mechanism 41 is rotatably connected to the air inlet 2. The axes of rotation are both along the left-right direction of the range hood (the left-right direction is the width direction of the range hood; in the normal installation state, when the user faces the range hood, the width direction is the left-right direction for the user). Furthermore, the output end of the first drive mechanism 41 is connected to the rear end of the air inlet 2, and preferably to the bottom of the air inlet 2, at the middle position of the left and right sides (allowing for certain errors due to manufacturing and assembly). The connector 431 is connected to the front end of the air inlet 2. The front and rear ends of the slide 432 are closed to restrict the position of the connector 431 and prevent it from falling out of the slide 432.

[0045] Therefore, when the output end of the first drive mechanism 41 extends downward, the rear end of the air inlet 2 moves downward, the front end of the air inlet 2 moves backward, and the air inlet 2 as a whole flips backward. When the output end of the first drive mechanism 41 retracts upward, the rear end of the air inlet 2 moves upward, the front end of the air inlet 2 moves forward, and the air inlet 2 as a whole flips forward.

[0046] To ensure that the rear side of the air inlet 2 remains flush with the wall after opening, the vertical cross-section of the air inlet 2 can be approximately triangular.

[0047] During the aforementioned movement, the center of gravity of the air intake 2 is constantly changing, and the first drive mechanism 41 will bear radial force. Therefore, rollers 5 are provided on the air intake 2, with the axis of rotation of the rollers 5 extending along the left-right direction of the range hood. The rollers 5 extend at least partially beyond the rear side of the air intake 2, allowing them to contact the wall where the range hood is installed, thereby counteracting the radial force generated during the movement of the air intake 2. The first drive mechanism 41 remains vertical during extension and retraction, eliminating the potential radial force problem it may bear. Furthermore, by providing rollers 5, direct hard contact between the air intake 2 and the wall is avoided, resulting in less damping fluctuation during the movement of the air intake 2, preventing large speed changes, incomplete opening and closing, abnormal noises, or even wall damage.

[0048] Preferably, the rollers 5 are located at the bottom of the air inlet body 2, so that the air inlet body 2 remains in contact with the wall throughout its movement. Preferably, there are two rollers 5, respectively located near the left and right sides of the air inlet body 2, so that the air inlet body 2 is stable on both sides during operation.

[0049] The air inlet 2 can also be connected to the upper housing assembly 1 without using the sliding groove 432 and connecting piece 431. Other movable connection methods can be used, such as the non-fixed-axis rotation disclosed in Chinese Patent Application No. 202510702608.7; or a non-linear sliding groove such as an arc-shaped sliding groove. Alternatively, a vertical sliding connection can be used, where the air inlet 2 moves vertically up and down. However, this may result in unstable movement, causing a shift in the center of gravity and applying radial force to the electric push rod.

[0050] The second drive mechanism 42, as described above, employs a motor and is mounted inside the upper housing assembly 1 via a mounting base 444. The second transmission mechanism includes a first connecting rod 441, a second connecting rod 442, and a third connecting rod 443. The output end of the second drive mechanism 42 can pass through the mounting base 444 and connect to the first connecting rod 441, thereby driving the first connecting rod 441 to rotate. One end of the second connecting rod 442 is rotatably connected to the first connecting rod 441, and the other end is rotatably connected to the third connecting rod 443. The third connecting rod 443 can be rotatably connected to the inner side of the bottom surface of the upper housing assembly 1, and is also fixed to the smoke baffle 3. The rotation axes of the rotating connections of the first connecting rod 441, the second connecting rod 442, and the third connecting rod 443 all extend along the left-right direction of the range hood. The third connecting rod 443 is in the form of a crank, and there can be two of them, respectively disposed on the left and right sides of the smoke baffle 3, to ensure smooth operation of both sides of the smoke baffle 3. Therefore, when the first connecting rod 441 rotates, it can drive the second connecting rod 442 to rotate non-fixed-axis, which in turn drives the third connecting rod 443 to rotate fixed-axis, causing the smoke baffle 3 to flip relative to the upper housing assembly 1. In this embodiment, the third connecting rod 443 is in the form of a crank.

[0051] The aforementioned air inlet 2, smoke baffle 3, and fan can all be controlled by a voice module. A controller, a voice receiving module, and a voice parsing module can be installed on the range hood. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the corresponding drive mechanisms of the air inlet 2, smoke baffle 3, and fan to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

Claims

1. A range hood, comprising: Upper housing assembly (1); An air inlet (2) is movably connected to the upper housing assembly (1) and can move relative to the upper housing assembly (1). The air inlet (2) can be in a state where it is at least partially below the bottom of the upper housing assembly (1) and exposed above the upper housing assembly (1). as well as The motion mechanism includes a first drive mechanism (41), which is an electric push rod. The output end of the first drive mechanism (41) can extend and retract vertically and is connected to the rear end of the air inlet (2). Its features are: The range hood also includes rollers (5) for mounting to the wall, the rollers (5) extending at least partially beyond the rear side of the air inlet (2), and the axis of rotation of the rollers (5) extending in the left-right direction of the range hood.

2. The range hood according to claim 1, characterized in that: The output end of the first drive mechanism (41) is connected to the bottom of the air inlet (2), and the roller (5) is located at the bottom of the air inlet (2).

3. The range hood according to claim 1, characterized in that: The output end of the first drive mechanism (41) is connected to the middle position of the air inlet body (2) along the left and right direction of the range hood, and the rollers (5) are two in number and are respectively arranged near the left and right sides of the air inlet body (2).

4. The range hood according to any one of claims 1 to 3, characterized in that: The motion mechanism also includes a first transmission mechanism, which includes a connector (431) disposed on the air inlet body (2) and a slide groove (432) disposed in the upper housing assembly (1). The connector (431) cooperates with the slide groove (432), so that the connector (431) can slide back and forth along the slide groove (432) and can rotate relative to the slide groove (432). The rotation axis of the connector (431) extends along the left and right direction of the range hood.

5. The range hood according to claim 4, characterized in that: The bottom surface of the upper housing assembly (1) is provided with an opening (13) for the air inlet (2) to enter and exit. The connector (431) is provided at the front end of the air inlet (2), and the slide (432) is located above the opening (13).

6. The range hood according to any one of claims 1 to 3, characterized in that: The range hood also includes a smoke baffle (3), which is installed at the bottom of the upper housing assembly (1) and can be flipped relative to the upper housing assembly (1).

7. The range hood according to claim 6, characterized in that: The motion mechanism further includes a second drive mechanism (42) and a second transmission mechanism. The second transmission mechanism includes a first connecting rod (441), a second connecting rod (442), and a third connecting rod (443). The first connecting rod (441) is driven to rotate by the second drive mechanism (42). One end of the second connecting rod (442) is rotatably connected to the first connecting rod (441), and the other end of the second connecting rod (442) is rotatably connected to the third connecting rod (443). The third connecting rod (443) is rotatably connected to the inner side of the bottom surface of the upper housing assembly (1), and the third connecting rod (443) is also fixed to the smoke baffle (3). The rotation axes of the rotational connections of the first connecting rod (441), the second connecting rod (442), and the third connecting rod (443) all extend along the left and right direction of the range hood.

8. The range hood according to claim 7, characterized in that: The second drive mechanism (42) is a motor. The second drive mechanism (42) is installed in the upper housing assembly (1) through the mounting base (444). The output end of the second drive mechanism (42) passes through the mounting base (444) and is connected to the first connecting rod (441).

9. The range hood according to claim 6, characterized in that: The air inlet (2) has a first smoke inlet (21) formed on its front side, and the first smoke inlet (21) can be exposed on the bottom surface of the upper housing assembly (1); The bottom surface of the upper housing assembly (1) is provided with an opening (13) for the air inlet (2) to enter and exit, and a second smoke inlet (14). The second smoke inlet (14) is located in front of the opening (13), and the smoke baffle (3) can open and close the second smoke inlet (14).

10. The range hood according to any one of claims 1 to 3, characterized in that: The bottom surface of the upper housing assembly (1) is provided with an opening (13) for the air inlet (2) to enter and exit.

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