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 baffle is driven by a first driving mechanism to rotate around a first axis extending left and right to be connected to the machine shell and can open and close the air inlet; an auxiliary connecting arm is arranged on the back surface of the smoke barrier; the range hood further comprises an auxiliary locking device, the auxiliary locking device comprises a second driving mechanism and a driving rod connected with the power output end of the second driving mechanism, and when the smoke barrier closes the air inlet, the driving rod is driven by the second driving mechanism to act on the auxiliary connecting arm. And the smoke baffle has the tendency of rotating in the direction of closing the air inlet. The smoke barrier has the advantage that the problem that the product fineness is affected due to untight closing of the smoke barrier can be effectively solved.

Description

Technical Field

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

[0002] The range hood is a commonly used kitchen appliance. Its main function is to draw in the fumes generated when the user cooks through the rotation of the fan system's impeller, filter the fumes through the inlet filter and impeller, and discharge the filtered fumes through the outlet, thereby completing the purification of the kitchen environment. The smoke baffle is a key component that controls whether the range hood's air inlet can be opened, and its working status has a significant impact on the fume extraction effect.

[0003] Existing range hoods typically feature an air inlet on the panel. To prevent the air inlet from being exposed when the range hood is not in use, which would be unsightly, and to increase the smoke trapping area, a smoke baffle is installed at the air inlet. For example, Chinese utility model patent application number CN201320529723.1 discloses such a range hood. The smoke baffle of a traditional close-suction range hood has a driving end at one end and a driven end at the other. The driving end and the driven end are arranged on either side of each other, and the driving end is driven by a driving mechanism to rotate the smoke baffle. Due to the inherent gravity of the smoke baffle, many range hoods experience loose closing of the driven end after the smoke baffle is closed, resulting in uneven gaps between the smoke baffle and the side panels. Some approaches have also positioned the driving end, which drives the deflection of the smoke baffle, in the middle of the smoke baffle in the left-right direction to address this loose closing issue. However, placing the driving end in the middle of the smoke baffle inevitably interferes with the installation of other components within the housing, creating interference issues.

[0004] Therefore, the existing close-suction range hood also needs further improvement. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a range hood that can effectively improve the problem of the product refinement being affected by the loose closure of the smoke baffle plate in response to the current status of the existing technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a range hood comprising:

[0007] The casing has an air inlet on its front side wall;

[0008] A smoke baffle is driven by a first driving mechanism to rotate about a first axis extending left and right and connected to the housing, and is capable of opening and closing the air inlet;

[0009] An auxiliary connecting arm is provided on the back of the smoke baffle;

[0010] It also includes an auxiliary locking device, which includes a second driving mechanism and a driving rod connected to the power output end of the second driving mechanism. When the smoke shield closes the air inlet, the driving rod is driven by the second driving mechanism to act on the auxiliary connecting arm, and makes the smoke shield tend to rotate in the direction of closing the air inlet.

[0011] The second driving mechanism can be a linear motion mechanism that drives the driving rod to move linearly, or it can be a rotational motion mechanism for driving the driving rod to rotate. Preferably, in order to better give way to the auxiliary connecting arm and reduce the occupied space, the second driving mechanism is a driving motor, and the first end of the driving rod is connected to the output shaft of the driving motor, and can be driven by the driving motor to rotate between the first position and the second position around the second axis extending left and right. When the driving rod is in the first position, the second end of the driving rod acts on the auxiliary connecting arm, and makes the smoke shield have a tendency to rotate in the direction of closing the air inlet. When the driving rod is in the second position, the second end of the driving rod releases the pressure on the auxiliary connecting arm and moves out of the rotation path of the auxiliary connecting arm, allowing the smoke shield to open the air inlet.

[0012] In order to better cooperate with the second end of the driving rod, the auxiliary connecting arm extends toward the side away from the smoke shield, and an actuating end that cooperates with the second end of the driving rod is formed at the end. When the driving rod is in the first position, the second end of the driving rod acts on the actuating end of the auxiliary connecting arm and applies a force to the actuating end to rotate the smoke shield in the direction of closing the air inlet.

[0013] In order to more securely lock the smoke shield in a closed state and prevent the auxiliary connecting arm of the smoke shield from detaching from the drive rod, the actuating end has a mating surface that is in sliding contact with the second end of the drive rod, and the mating surface has a locking area close to the above-mentioned first axis and a transition area away from the above-mentioned first axis. When the smoke shield is in a closed state or a state close to the closed state, the distance between the position of the transition area and the above-mentioned second axis is recorded as the first distance, and the distance between the position of the locking area and the above-mentioned second axis is recorded as the second distance. The first distance is greater than the second distance.

[0014] In order to avoid the auxiliary locking device from getting stuck when acting on the actuating end of the auxiliary connecting arm, the contour surface on the mating surface of the actuating end, at least between the transition area and the locking area, is constructed as a smoothly transitioned curved surface structure.

[0015] In order to make a more reasonable spatial layout of the auxiliary locking device in the casing and avoid interference with other components of the casing, the rotation axis of the first end of the driving rod is located in the front and above the rotation axis of the smoke baffle relative to the casing. When the smoke baffle is in a closed state or a nearly closed state, the actuating end of the auxiliary connecting arm is located between the vertical plane where the first axis is located and the vertical plane where the second axis is located, and the second end of the driving rod acts on the rear side of the auxiliary connecting arm.

[0016] In order to make the sliding cooperation between the driving rod and the auxiliary connecting arm smoother, the second end of the driving rod is provided with a roller that can rotate freely around a third axis extending left and right, and the roller is in rolling contact with the actuating end of the auxiliary connecting arm.

[0017] The roller can adopt a ball structure or a roller structure. In order to simplify the roller structure at the second end of the driving rod, the second end of the driving rod is provided with a pin extending outward from the side of the main body of the driving rod in the left and right directions. The pin is outerly provided with a freely rotatable sleeve, and the sleeve constitutes the roller.

[0018] The auxiliary connecting arm on the smoke deflector can be an independent component separately provided on the back of the smoke deflector in addition to conventional rocker and other components, or the built-in rocker can be used as an auxiliary connecting arm to reduce the number of parts. Preferably, the smoke deflector is connected to the casing through a rocker rotation, and the main body of the rocker is constructed with an arm extending toward the side away from the smoke deflector and capable of cooperating with the drive rod. The rocker constitutes the auxiliary connecting arm.

[0019] As an improvement, the left and right sides of the smoke baffle are rotatably connected to the casing through the rocker, and the first driving mechanism and the auxiliary locking device are respectively arranged on the left and right sides of the casing and cooperate with the two rockers accordingly.

[0020] Compared with the existing technology, the advantages of the utility model are: an auxiliary locking device is provided in the casing, and the auxiliary locking device drives the drive rod to move through the second driving mechanism, and applies a force to the auxiliary connecting arm on the smoke damper to deflect in the direction of closing the air inlet when the smoke damper is closed, ensuring that the smoke damper can be firmly closed at the air inlet when it is close to the closed state, avoiding the problem of one side of the smoke damper tilting, making the closed states of the left and right sides tend to be consistent, and improving the sophistication of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of a range hood according to an embodiment of the present utility model;

[0022] Figure 2This is a right side view of the smoke hood of the embodiment of the utility model (the right side wall of the smoke hood is omitted, and the smoke baffle is in an unlocked state);

[0023] Figure 3 This is a right side view of the smoke hood of the embodiment of the present utility model (the right side wall of the smoke hood is omitted, and the smoke baffle is in a closed state);

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the smoke collection hood of the embodiment of the utility model after omitting the right side wall;

[0025] Figure 5 Schematic diagram of the three-dimensional structure of the rocker according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0027] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0028] Figure 1-Figure 5A preferred embodiment of the range hood of the present invention is shown. The range hood includes a housing 10 and a centrifugal fan disposed within the housing 10. The housing 10 generally includes a fan frame 11 and a fume hood 12 disposed at the bottom of the fan frame 11. The interior of the fan frame 11 is connected to the interior of the fume hood 12. The front sidewall of the fume hood 12 slopes backward from top to bottom and is provided with an air inlet 120, through which external smoke can enter the fume hood 12. A centrifugal fan (not shown) is disposed within the fan frame 11. When the centrifugal fan is in operation, it generates negative pressure, allowing external oil smoke to be drawn into the fume hood 12 through the air inlet 120. An oil screen is also provided at the air inlet 120 of the fume hood 12 to filter the oil smoke. An oil cup 14 is provided at the bottom of the fume hood 12. The oil cup 14 is a long strip extending from side to side and is used to collect oily dirt flowing down from the fume hood 12. The front portion of the smoke hood 12 is further provided with a smoke deflector 13 that can be deflected forward and backward relative to the smoke hood 12. The left and right sides of the smoke deflector 13 are rotatably connected to the main body of the smoke hood 12 via rocker arms 15. Specifically, the smoke deflector 13 is driven by a first drive mechanism to deflect forward to open the aforementioned air inlet 120 and deflect backward to block and close the aforementioned air inlet 120. The first drive mechanism for driving the deflection of the smoke deflector 13 can be a conventional motor and connecting rod assembly kinematic mechanism in the prior art, and will not be described in detail here.

[0029] The first end of the rocker 15 is rotatably connected to the smoke hood 12 via a pin 231 extending left and right, and the axis of the pin 231 is the first axis. The second end of the rocker 15 is connected to the smoke plate bracket 130 on the back of the smoke baffle 13.

[0030] The above-mentioned first driving mechanism is generally provided on one of the left and right sides of the smoke hood 12, wherein the side connected to the first driving mechanism on the left and right sides (both ends) of the smoke baffle 13 is the driving end, and the other end is the driven end. Due to the gravity of the smoke baffle 13 itself, the driven end may not be tightly closed after the smoke baffle 13 is closed. For this reason, the smoke hood 12 of the range hood of this embodiment is provided with an auxiliary locking device on the side corresponding to the above-mentioned driven end. In order to cooperate with the above-mentioned auxiliary locking device, a support arm 151 extending toward the side away from the smoke baffle 13 is constructed on the main body of the rocker arm 15 on the side where the driven end of the smoke baffle 13 is located. The support arm 151 can assist the driving rod 22 of the locking device to form a locking fit. The above-mentioned rocker arm 15 is also the auxiliary connecting arm of this embodiment.

[0031] The auxiliary locking device includes a second drive mechanism and a drive rod 22 connected to the power output of the second drive mechanism. In a preferred embodiment, the second drive mechanism is a drive motor 21. The first end of the drive rod 22 is connected to the output shaft of the drive motor 21 and is driven by the drive motor 21 to rotate about a second axis extending horizontally between a first position and a second position. When the drive rod 22 is in the first position, the second end of the drive rod 22 acts on the arm 151 of the rocker 15 of the smoke damper 13, causing the smoke damper 13 to rotate in a direction that closes the air inlet 120. When the drive rod 22 is in the second position, the second end of the drive rod 22 releases the pressure on the arm 151 of the rocker 15 of the smoke damper 13 and moves out of the rotation path of the rocker 15 and its arm 151 (to avoid interference), allowing the smoke damper 13 to open the air inlet 120.

[0032] In this embodiment, the support arm 151 of the rocker arm 15 forms an actuating end at its end distal from the smoke deflector 13, which mates with the second end of the drive rod 22. When the drive rod 22 is in the first position, the second end of the drive rod 22 acts on the actuating end of the auxiliary connecting arm, applying a force to the actuating end that rotates the smoke deflector 13 in the direction of closing the air inlet 120. Specifically, the actuating end of the rocker arm 15 has a mating surface that slidably contacts the second end of the drive rod 22. This mating surface includes a locking region 1502 proximal to the first axis and a transition region 1501 distal to the first axis. To prevent the auxiliary locking device from becoming stuck when acting on the actuating end of the auxiliary connecting arm, at least the contoured surface of the actuating end between the transition region 1501 and the locking region 1502 is configured as a smoothly transitioned curved surface. When the smoke baffle 13 is in a closed state or nearly closed state, the distance between the transition area 1501 and the second axis is recorded as the first distance L1, and the distance between the locking area 1502 and the second axis is recorded as the second distance L2. The first distance L1 is greater than the second distance L2. Generally, in order to make the sliding fit between the second end of the driving rod 22 and the mating surface of the actuating end of the rocker 15 more stable and effortless, the first distance L1 can be selected to be slightly larger than the second distance L2. Figure 2 The figure shows a state in which the second end of the driving rod 22 is about to contact the transition area 1501 of the mating surface of the rocker 15 during the rotation process. In this state, a gap 3 is formed between the driven end side of the smoke baffle 13 and the front side wall of the housing 10. Figure 3 The figure shows a state in which the second end of the driving rod 22 passes through the transition area 1501 of the mating surface with the rocker 15 and is stably engaged in the locking area 1502 during the rotation process. In this state, Figure 2 The gap 3 between the driven end side of the smoke baffle 13 and the front side wall of the casing 10 is eliminated.

[0033] The second end of the drive rod 22 is provided with a roller that can freely rotate about a third axis extending horizontally. The roller can be a ball bearing structure or a roller structure. To simplify the roller structure at the second end of the drive rod 22, in a preferred embodiment, the second end of the drive rod 22 is provided with a pin 231 extending outwardly from the side of the main body of the drive rod 22 in the horizontal direction. The pin 231 is covered with a freely rotating sleeve 232, which constitutes the aforementioned roller. The use of the roller at the second end of the drive rod 22 to mate with the actuating end of the rocker 15 can ensure smooth sliding engagement between the two and reduce the risk of jamming.

[0034] The rotation axis of the first end of the driving rod 22 of this embodiment is located in the front and upper part of the rotation axis of the smoke damper 13 relative to the casing 10. When the smoke damper 13 is in a closed state or a nearly closed state, the actuating end of the auxiliary connecting arm is located between the vertical plane where the first axis is located and the vertical plane where the second axis is located, and the second end of the driving rod 22 acts on the rear side of the support arm 151 of the rocker 15 (that is, the side away from the second axis).

[0035] An auxiliary locking device is provided in the casing 10 of this embodiment, and the auxiliary locking device drives the driving rod 22 to move through the second driving mechanism. When the smoke deflector 13 is closed, a force is applied to the auxiliary connecting arm on the smoke deflector 13 to deflect the air inlet 120 in the direction of closing the smoke deflector 13, ensuring that the smoke deflector 13 can be securely closed at the air inlet 120 when it is close to the closed state, avoiding the problem of one side of the smoke deflector 13 tilting, making the closed states of the left and right sides tend to be consistent, thereby improving the sophistication of the product.

[0036] Based on the above embodiments, other embodiments can be obtained by replacing or improving relevant technical features. For example, the auxiliary connecting arm on the smoke deflector 13 can be a separate component provided on the back of the smoke deflector 13, in addition to conventional components such as the rocker 15, and is not limited to the rocker 15 in the above embodiment. For another example, the second drive mechanism does not utilize the aforementioned rotary motion mechanism of the drive motor 21 and the drive rod 22, but can instead utilize a linear motion mechanism that drives the drive rod / component in linear motion.

Claims

1. A range hood comprising: The housing (10) has an air inlet (120) formed on its front side wall; A smoke baffle (13) is driven by a first driving mechanism to rotate about a first axis extending leftward and rightward and is connected to the housing (10), and is capable of opening and closing the air inlet (120); The feature is that an auxiliary connecting arm is provided on the back of the smoke baffle (13); The auxiliary locking device further comprises a second driving mechanism and a driving rod (22) connected to a power output end of the second driving mechanism. When the smoke shield (13) closes the air inlet (120), the driving rod (22) is driven by the second driving mechanism to act on the auxiliary connecting arm, and causes the smoke shield (13) to have a tendency to rotate in a direction of closing the air inlet (120); The second driving mechanism is a driving motor (21), and the first end of the driving rod (22) is connected to the output shaft of the driving motor (21), and can be driven by the driving motor (21) to rotate between a first position and a second position around a second axis extending left and right. When the driving rod (22) is in the first position, the second end of the driving rod (22) acts on the auxiliary connecting arm and makes the smoke shield (13) have a tendency to rotate in the direction of closing the air inlet (120). When the driving rod (22) is in the second position, the second end of the driving rod (22) releases the pressure on the auxiliary connecting arm and moves out of the rotation path of the auxiliary connecting arm, allowing the smoke shield (13) to open the air inlet (120).

2. The range hood according to claim 1, characterized in that: The auxiliary connecting arm extends toward a side away from the smoke shield (13), and an actuating end is formed at the end thereof to cooperate with the second end of the driving rod (22). When the driving rod (22) is in the first position, the second end of the driving rod (22) acts on the actuating end of the auxiliary connecting arm and applies a force to the actuating end to rotate the smoke shield (13) in the direction of closing the air inlet (120).

3. The range hood according to claim 2, characterized in that: The actuating end has a mating surface that is in sliding contact with the second end of the driving rod (22), and the mating surface has a locking area (1502) close to the above-mentioned first axis and a transition area (1501) away from the above-mentioned first axis. When the smoke shield (13) is in a closed state or a state close to the closed state, the distance between the position of the transition area (1501) and the above-mentioned second axis is recorded as the first distance, and the distance between the position of the locking area (1502) and the above-mentioned second axis is recorded as the second distance. The first distance is greater than the second distance.

4. The range hood according to claim 3, characterized in that: The contour surface on the mating surface of the actuating end, at least between the transition area (1501) and the locking area (1502), is constructed as a smoothly transitioned curved surface structure.

5. The range hood according to claim 2, characterized in that: The rotation axis of the first end of the driving rod (22) is located above and in front of the rotation axis of the smoke baffle (13) relative to the housing (10); when the smoke baffle (13) is in a closed state or a nearly closed state, the actuating end of the auxiliary connecting arm is located between the vertical plane where the first axis is located and the vertical plane where the second axis is located, and the second end of the driving rod (22) acts on the rear side of the auxiliary connecting arm.

6. The range hood according to any one of claims 2 to 5, characterized in that: The second end of the driving rod (22) is provided with a roller which can freely rotate around a third axis extending left and right, and the roller is in rolling contact with the actuating end of the auxiliary connecting arm.

7. The range hood according to claim 6, characterized in that: The second end of the driving rod (22) is provided with a pin shaft (231) extending outward in the left and right directions from the side of the main body of the driving rod (22), and the pin shaft (231) is provided with a freely rotatable shaft sleeve (232) on its outer shell, and the shaft sleeve (232) constitutes the roller.

8. The range hood according to any one of claims 1 to 5, characterized in that: The smoke shield (13) is rotatably connected to the housing (10) via a rocker (15). A support arm (151) is constructed on the main body of the rocker (15) and extends toward a side away from the smoke shield (13) and can cooperate with the driving rod (22). The rocker (15) constitutes the auxiliary connecting arm.

9. The range hood according to claim 8, characterized in that: The left and right sides of the smoke baffle (13) are rotatably connected to the housing (10) via the rocker (15); the first driving mechanism and the auxiliary locking device are respectively arranged on the left and right sides of the housing (10) and correspondingly cooperate with the two rockers (15).

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