A type of range hood

Abstract

A range hood includes: a housing with a hollow interior forming a chamber with a smoke inlet and a smoke outlet; the housing has a rear side facing the wall to be installed; and an oil drain hole on the bottom wall of the housing. An oil cup is located below the bottom wall of the housing and has an oil receiving cavity with a top opening to collect oil from the drain hole within the housing; the oil cup has a back side facing the wall to be installed. The oil cup is rotatable about a first axis extending left and right, and has two states: an inclined state where the top opening of the oil cup is tilted forward and still opposite the oil drain hole, and the back side of the oil cup is tilted backward from top to bottom and protrudes relative to the rear side of the housing, so that the lower edge of the back side of the oil cup can be adjacent to or in contact with the wall to be installed; and an initial state where the top opening of the oil cup is facing upward and opposite the oil drain hole, and the back side of the oil cup extends vertically and is retracted relative to the rear side of the housing. This invention prevents oil fumes from entering the gap between the rear side of the range hood and the wall to be installed.

Description

Technical Field

[0001] This invention 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, allowing the kitchen fumes to escape outdoors under atmospheric pressure. To prevent fumes from escaping, a movable baffle is typically installed at the fumes inlet. A specific example is the Chinese invention patent application (application number 202310804283.4, publication number CN116734301A) entitled "Baffle Driving System, Baffle Driving Method, Range Hood, Storage Medium," which describes a baffle driving system connected to the baffle, including a motor; a transmission mechanism connected between the motor and the baffle, capable of converting the motor's rotational motion into a swinging motion of the baffle; and a hydraulic system connected to the transmission mechanism, used to provide resistance to the transmission mechanism to adjust the driving speed of the baffle.

[0003] The design of the smoke baffle effectively intercepts rising cooking fumes, reducing the risk of fumes escaping. However, existing grease cups are mostly installed at the bottom of the range hood, and the movement of the smoke baffle involves rotation. During the opening and closing process, there is a risk of collision between the smoke baffle and the grease cup. Therefore, a certain gap is left between the grease cup and the smoke baffle in the design to avoid interference. However, after the range hood has been used for a period of time, grease will accumulate on the surface of the smoke baffle. The gap prevents the grease on the smoke baffle from flowing into the grease cup and causes it to drip onto the stovetop, affecting the user experience.

[0004] Additionally, when a range hood is installed in a cabinet or on a wall, a gap is usually left between the back of the range hood casing and the wall surface. When the range hood is working, some of the rising fumes can enter this gap, causing grease to accumulate on the wall surface. Summary of the Invention

[0005] The first technical problem to be solved by the present invention is to provide a range hood that can prevent oil fumes from entering the gap between the rear side of the range hood and the wall to be installed, in light of the current state of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide a range hood that can collect oil in the oil cup while avoiding interference with the rotation of the smoke baffle.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood, comprising:

[0008] The housing has a hollow interior forming a chamber with a smoke inlet and a smoke outlet, and the housing has a rear side facing the wall to be installed on, and the bottom wall of the housing has an oil leakage hole.

[0009] A fan system, located inside the casing, is used to drive the oil fume airflow into the chamber through the smoke inlet and out through the smoke outlet;

[0010] An oil cup is located below the bottom wall of the housing and has an oil receiving cavity with a top opening to receive oil from the oil drain hole inside the housing, and the oil cup has a back side facing the wall to be installed.

[0011] Its features are:

[0012] The oil cup is configured to rotate about a first axis extending to the left and right, and has the following two states:

[0013] The top opening of the oil cup is tilted forward and still opposite the oil leakage hole. The back of the oil cup is tilted backward from top to bottom and protrudes relative to the rear side of the housing, so that the lower edge of the back of the oil cup can be adjacent to or in contact with the wall surface to be installed.

[0014] The oil cup is initially positioned with its top opening facing upwards and opposite the oil drain hole, while the back of the oil cup extends vertically and converges relative to the rear side of the housing.

[0015] When the range hood is turned on, the grease cup can be rotated to a tilted position. At this time, the grease inside the casing will collect in the grease cup through the drain hole. Simultaneously, the back of the grease cup tilts backward from top to bottom, protruding relative to the rear side of the casing. This allows the lower edge of the grease cup's back to be close to or in contact with the wall surface, effectively preventing grease from rising and entering the gap between the rear side of the range hood and the wall. When the range hood is turned off, the grease cup can be rotated back to its initial position to better preserve the collected grease.

[0016] Preferably, the first axis is located above the oil cup, corresponding to the center position in the front-back direction of the oil cup.

[0017] Preferably, it also includes a driving mechanism that acts on the oil cup to drive the oil cup to rotate to an inclined state or an initial state.

[0018] In order to better collect oil stains into the oil cup, the front side wall of the housing is further inclined from top to bottom and rearward, and is provided with the above-mentioned smoke inlet;

[0019] It also includes a smoke baffle plate, which is mounted at the smoke inlet in a manner that allows it to flip back and forth around a second axis extending left and right, thus opening and closing the smoke inlet. The second axis is adjacent to the upper edge of the smoke baffle plate and away from its lower edge. When the smoke inlet is closed, the smoke baffle plate tilts backward from top to bottom, and its lower edge extends above and opposite the top opening of the oil cup in its initial state. In this way, when the smoke inlet is closed, some oil can flow downward through the surface of the smoke baffle plate and collect in the oil cup.

[0020] The aforementioned positional relationship between the smoke baffle and the oil cup may cause the oil cup to interfere with the rotation of the smoke baffle. For example, when the smoke baffle is open, the lower edge of the smoke baffle may hit the oil cup. Therefore, to further solve the second technical problem mentioned above, preferably, the driving mechanism acts on the smoke baffle simultaneously, and the oil cup is in an inclined state when the smoke baffle opens the smoke inlet; the oil cup is in its initial state when the smoke baffle closes the smoke inlet. The inclined oil cup can avoid the rotation trajectory of the lower edge of the smoke baffle, preventing oil fumes from interfering with the rotation of the smoke baffle. The oil cup in its initial state can better collect and retain the oil stains flowing down from the surface of the smoke baffle.

[0021] Furthermore, the smoke baffle and the oil cup move synchronously under the action of the driving mechanism. Of course, they can also move sequentially, such as the oil cup rotating to an inclined state before the smoke baffle opens and then rotating back to the initial state after the smoke baffle closes.

[0022] Furthermore, the drive mechanism includes:

[0023] The electric actuator has its rear end rotatably connected inside the housing, and its rotation axis extends to the left and right, while its front end is the power output end.

[0024] A hinge component connects the smoke baffle to the power output end of the electric push rod, so as to convert the forward and backward extension force of the power output end into a force that causes the smoke baffle to flip back and forth.

[0025] The transmission rod has its front end rotatably connected to the power output end of the electric push rod, and its rotation axis extends to the left and right.

[0026] The push rod has its upper end rotatably connected to the rear end of the transmission rod and its rotation axis extends left and right. Its lower end is provided with a drive gear, and the central axis of the drive gear extends left and right.

[0027] The bottom of the housing is provided with a mounting base for installing an oil cup. The mounting base is provided with a driven gear that meshes with the driving gear. The central axis of the driven gear is the first axis.

[0028] Preferably, the mounting base has a slot, the oil cup is provided with a insert that can be inserted into the slot from front to back, and the mounting base is provided with a limiting member to prevent the insert from moving forward and disengaging from the slot. This facilitates the installation and removal of the oil cup and ensures that the oil cup is stably installed on the mounting base.

[0029] Furthermore, the limiting member includes a limiting block, which is constrained above the insert by springs extending vertically, and always tends to press downward against the insert under the action of the springs.

[0030] In the above embodiments, preferably, the oil cup in the initial state is located on the rotation path of the lower edge of the smoke baffle; the oil cup in the tilted state is located outside the rotation path of the lower edge of the smoke baffle.

[0031] Preferably, in the tilted state, the tilt angle of the back of the oil cup relative to the vertical plane is ≤5°. Limiting the tilt angle of the oil cup can prevent oil from spilling out of the oil cup, while also effectively blocking rising oil and preventing oil fumes from entering the gap between the rear side of the range hood and the wall to be installed.

[0032] Preferably, the oil cup is an elongated strip extending from left to right.

[0033] Compared with existing technologies, the advantages of this invention are as follows: When the range hood is turned on to extract fumes, the oil cup can be rotated to an inclined position. At this time, the grease inside the casing can be collected into the oil cup through the oil drain hole. Simultaneously, the back of the oil cup tilts backward from top to bottom, protruding relative to the rear side of the casing. This allows the lower edge of the back of the oil cup to be adjacent to or in contact with the wall surface to be installed, thereby preventing fumes from rising and entering the gap between the rear side of the range hood and the wall surface. When the range hood is turned off, the oil cup can be rotated back to its initial position to better preserve the collected grease. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention (the oil cup is in the initial state, and the smoke inlet is closed by the baffle plate);

[0035] Figure 2 for Figure 1 A partial sectional view of a central-range hood;

[0036] Figure 3 for Figure 1 A partial 3D exploded view of a center-draft range hood;

[0037] Figure 4 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention (the oil cup is tilted and the smoke inlet is open).

[0038] Figure 5 for Figure 4 Side view of a center-draft range hood;

[0039] Figure 6 for Figure 4 A partial sectional view of a central-range hood. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] like Figures 1-6 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, an oil cup 2, a drive mechanism 3, and a smoke baffle 4.

[0042] The housing 1 has a hollow interior forming a chamber 10. The front wall of the chamber 10 slopes backward from top to bottom and has a smoke inlet 10a. The bottom wall of the chamber 10 has an oil leakage hole. The rear wall of the chamber 10 extends vertically and has a rear side 11 facing the wall to be installed. The top wall of the chamber 10 has a smoke outlet.

[0043] The fan system is an existing centrifugal fan, which is located inside the casing 1 and is used to drive the oil fume airflow into the chamber 10 through the smoke inlet 10a and out through the smoke outlet.

[0044] The aforementioned smoke baffle 4 is disposed at the smoke inlet 10a in such a way that it can flip back and forth around the second axis that extends left and right, so as to open and close the smoke inlet 10a. The second axis is close to the upper edge of the smoke baffle 4 and away from the lower edge of the smoke baffle 4. When the smoke inlet 10a is closed, the smoke baffle 4 tilts backward from top to bottom; when the smoke inlet 10a is open, the smoke baffle 4 tilts forward from top to bottom.

[0045] The oil cup 2 is an elongated strip extending horizontally, located below the bottom wall of the housing 1, and has an oil receiving cavity with a top opening 20 to collect oil from the drain hole inside the housing 1. The oil cup 2 also has a back surface 21 facing the wall to be installed. Furthermore, the oil cup 2 is rotatable about a first horizontally extending axis, which is located above the oil cup 2 and corresponds to the center position in the front-rear direction. The oil cup 2 has the following two states:

[0046] The top opening 20 of the oil cup 2 is tilted forward and still opposite the oil drain hole. The back surface 21 of the oil cup 2 is tilted backward from top to bottom and protrudes relative to the rear side 11 of the housing 1, so that the lower edge of the back surface 21 of the oil cup 2 can be close to or in contact with the wall surface to be installed. In the tilted state, the tilt angle α of the back surface 21 of the oil cup 2 relative to the vertical plane is ≤5°. Please refer to [link to relevant documentation] for details. Figure 5 Furthermore, the tilted oil cup 2 is located outside the rotation path of the lower edge of the smoke baffle 4.

[0047] In the initial state, with the top opening 20 of the oil cup 2 facing upwards and opposite the oil drain hole, the back side 21 of the oil cup 2 extends vertically and retracts relative to the rear side 11 of the housing 1. At this time, the lower edge of the baffle plate 4, which is in the closed smoke inlet 10a state, extends above the top opening 20 of the oil cup 2 in the initial state and is opposite to the top opening 20 of the oil cup 2. For details, please refer to [link / reference]. Figure 2 And initially, the oil cup 2 is located on the rotation path of the lower edge of the smoke baffle 4.

[0048] The aforementioned driving mechanism 3 acts simultaneously on the oil cup 2 and the smoke baffle 4 to drive the smoke baffle 4 and the oil cup 2 to rotate synchronously. When the smoke baffle 4 opens the smoke inlet 10a, the oil cup 2 is in an inclined state; when the smoke baffle 4 closes the smoke inlet 10a, the oil cup 2 is in the initial state. Specifically, the drive mechanism 3 includes an electric push rod 31, a hinge 32, a transmission rod 33, and a push rod 34. The rear end of the electric push rod 31 is rotatably connected inside the housing 1, and its rotation axis extends left and right. The front end of the electric push rod 31 is the power output end. The hinge 32 connects the smoke baffle 4 to the power output end of the electric push rod 31 to convert the forward and backward extension force of the power output end into a force that causes the smoke baffle 4 to flip back and forth. The front end of the transmission rod 33 is rotatably connected to the power output end of the electric push rod 31, and its rotation axis extends left and right. The upper end of the push rod 34 is rotatably connected to the rear end of the transmission rod 33, and its rotation axis extends left and right. The lower end of the push rod 34 is provided with a drive gear 35, and the central axis of the drive gear 35 extends left and right. The bottom of the housing 1 is provided with a mounting base 12 for installing the oil cup 2. The mounting base 12 is provided with a driven gear 36 that meshes with the drive gear 35. The central axis of the driven gear 36 is the first axis.

[0049] At the same time, such as Figure 2 , 3 As shown, the mounting base 12 in this embodiment has a slot 120. The oil cup 2 is provided with a insert 22 that can be inserted into the slot 120 from front to back. The mounting base 12 is provided with a limiting member to prevent the insert 22 from moving forward and disengaging from the slot 120. The limiting member includes a limiting block 13, which is constrained above the insert 22 by a spring 14 extending vertically, and under the action of the spring 14, it always tends to press downward against the insert 22. This facilitates the installation and removal of the oil cup 2 and ensures that the oil cup 2 is stably installed on the mounting base 12.

[0050] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0051] The term "vertical" is also used in the specification and claims of this invention, meaning basically along the up and down direction, and is not limited to just the vertical direction, but can also be slightly deviated from the vertical direction.

Claims

1. A range hood, comprising: The housing (1) has a hollow interior forming a chamber (10) with a smoke inlet (10a) and a smoke outlet, and the housing (1) has a rear side (11) facing the wall to be installed, and the bottom wall of the housing (1) is provided with an oil leakage hole. The fan system is located inside the casing (1) and is used to drive the oil fume airflow into the chamber (10) through the smoke inlet (10a) and out through the smoke outlet; An oil cup (2) is located below the bottom wall of the housing (1) and has an oil receiving cavity with a top opening (20) to receive oil stains output from the oil leakage hole inside the housing (1), and the oil cup (2) has a back side (21) facing the wall to be installed. Its features are: The oil cup (2) is configured to rotate about a first axis extending to the left and right, and has the following two states: The top opening (20) of the oil cup (2) is tilted forward and still opposite to the oil leakage hole. The back (21) of the oil cup (2) is tilted backward from top to bottom and protrudes relative to the rear side (11) of the housing (1), so that the lower edge of the back (21) of the oil cup (2) can be adjacent to or in contact with the wall surface to be installed. In the initial state, the top opening (20) of the oil cup (2) faces upward and is opposite to the oil leakage hole, and the back side (21) of the oil cup (2) extends vertically and is closed relative to the rear side (11) of the housing (1).

2. The range hood according to claim 1, characterized in that: The first axis is located above the oil cup (2), corresponding to the center position in the front-back direction of the oil cup (2).

3. The range hood according to claim 2, characterized in that: It also includes a drive mechanism (3) that acts on the oil cup (2) to drive the oil cup (2) to rotate to an inclined state or an initial state.

4. The range hood according to claim 3, characterized in that: The front side wall of the housing (1) slopes backward from top to bottom and is provided with the aforementioned smoke inlet (10a); It also includes a smoke baffle (4), which is disposed at the smoke inlet (10a) in a manner that can be flipped back and forth around a second axis that extends left and right, so as to open and close the smoke inlet (10a). The second axis is adjacent to the upper edge of the smoke baffle (4) and away from the lower edge of the smoke baffle (4). When the smoke inlet (10a) is closed, the smoke baffle (4) is tilted backward from top to bottom. The lower edge of the smoke baffle (4) extends to the top opening (20) of the oil cup (2) in the initial state and is opposite to the top opening (20) of the oil cup (2).

5. The range hood according to claim 4, characterized in that: The driving mechanism (3) acts on the smoke baffle (4) at the same time, and when the smoke baffle (4) opens the smoke inlet (10a), the oil cup (2) is in an inclined state; when the smoke baffle (4) closes the smoke inlet (10a), the oil cup (2) is in the initial state.

6. The range hood according to claim 5, characterized in that: The smoke baffle (4) and the oil cup (2) move synchronously under the action of the drive mechanism (3).

7. The range hood according to claim 6, characterized in that: The drive mechanism (3) includes: The electric push rod (31) has its rear end rotatably connected inside the housing (1) and its rotation axis extends to the left and right, and its front end is the power output end; The hinge (32) connects the smoke baffle (4) to the power output end of the electric push rod (31) to convert the forward and backward extension force of the power output end into a force that causes the smoke baffle (4) to flip forward and backward. The transmission rod (33) has its front end rotatably connected to the power output end of the electric push rod (31) and its rotation axis extends to the left and right. The push rod (34) has its upper end rotatably connected to the rear end of the transmission rod (33) and its rotation axis extends left and right. Its lower end is provided with a drive gear (35) and the central axis of the drive gear (35) extends left and right. The bottom of the housing (1) is provided with a mounting base (12) for installing an oil cup (2). The mounting base (12) is provided with a driven gear (36) that meshes with the driving gear (35). The central axis of the driven gear (36) is the first axis.

8. The range hood according to claim 7, characterized in that: The mounting base (12) has a slot (120), the oil cup (2) is provided with a insert (22) that can be inserted into the slot (120) from front to back, and the mounting base (12) is provided with a limiting member for restricting the insert (22) from moving forward and disengaging from the slot (120).

9. The range hood according to claim 8, characterized in that: The limiting member includes a limiting block (13), which is constrained above the insert (22) by a spring (14) extending vertically, and always tends to press downward against the insert (22) under the action of the spring (14).

10. The range hood according to any one of claims 4 to 9, characterized in that: The oil cup (2) in its initial state is located on the rotation path of the lower edge of the smoke baffle (4); the oil cup (2) in its tilted state is located outside the rotation path of the lower edge of the smoke baffle (4).

11. The range hood according to any one of claims 1 to 9, characterized in that: In the tilted state, the tilt angle of the back surface (21) of the oil cup (2) relative to the vertical plane is ≤5°.

12. The range hood according to any one of claims 1 to 9, characterized in that: The oil cup (2) is a long strip extending from left to right.

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