A smoke baffle drive mechanism, a range hood

Abstract

The present invention relates to a smoke baffle driving mechanism, which includes a motor, a driving disk fixed on the driving shaft of the motor, and a driving arm connected to the driving disk and the smoke baffle; a first member provided on the driving arm and having an installation cavity inside; a movable block disposed in the installation cavity and capable of reciprocatingly moving in a direction away from and close to the driving disk; a driving assembly linked to the movable block to drive the movable block to reciprocate relative to the driving disk; a retaining pin connected to the movable block, and the retaining pin respectively passes through the cavity wall of the installation cavity and the driving arm and is limited on the driving disk; a first card hole for the retaining pin to be inserted is provided on the driving disk at a position corresponding to the driving assembly for closing the smoke baffle, and a second card hole for the retaining pin to be inserted is provided on the driving disk at a position corresponding to the driving assembly for opening the smoke baffle. This smoke baffle driving mechanism can help the smoke baffle to open to ensure the normal use of the range hood when the motor fails or the smoke baffle is stuck. The present invention also relates to a range hood applying this smoke baffle driving mechanism.

Description

Technical Field

[0001] The present invention relates to a smoke baffle driving mechanism, and also relates to a range hood applying the smoke baffle driving mechanism. Background Art

[0002] A range hood is a commonly used kitchen appliance. Its main function is to rotate the impeller of the fan system to suck the cooking fumes generated by the user from the air inlet, filter the fumes by using the air inlet filter screen and the impeller, and discharge the filtered fumes from the air outlet, thereby completing the purification work of the kitchen environment. The smoke baffle is a key component for controlling whether the air inlet of the range hood can be opened, and its working state has an important impact on the fume suction effect.

[0003] At present, most of the range hoods with an active opening and closing structure at the air inlet on the market are driven by a motor. The motor provides power, and the smoke baffle at the air inlet is opened through a motion mechanism. Since the range hood is basically a closed cavity when the smoke baffle is not opened, when the driving motor is damaged and cannot provide power, the smoke baffle cannot be opened. Although the internal fan works normally, the whole machine cannot work properly because the air inlet is not opened. Moreover, even if the motor is not damaged, but the output function decreases or the smoke baffle is adhered to the box body due to oil stains, it will still cause the problem that the smoke baffle cannot be opened and the whole machine cannot work. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a smoke baffle driving mechanism for the above-mentioned existing technology, which can help the smoke baffle to open to ensure the normal use of the range hood when the motor fails or the smoke baffle is stuck.

[0005] The second technical problem to be solved by the present invention is to provide a range hood applying the aforementioned smoke baffle driving mechanism for the above-mentioned existing technology, which can avoid the range hood from being unable to work properly due to the smoke baffle being locked when the motor fails.

[0006] The technical solution adopted by the present invention to solve the above first technical problem is: a smoke baffle driving mechanism, including a motor, a driving disk fixedly connected to the driving shaft of the motor, and a driving arm connected to the driving disk and the smoke baffle;

[0007] Characterized in that: it further includes

[0008] a first component, which is arranged on the driving arm and has an installation cavity inside;

[0009] a movable block, which is arranged in the installation cavity and can reciprocate in a direction away from and close to the driving disk;

[0010] a driving assembly, which is linked with the movable block to drive the movable block to reciprocate relative to the driving disk;

[0011] The latch pin is connected to the movable block, and the latch pin passes through the cavity wall of the installation cavity and the driving arm respectively and is limited on the driving disk;

[0012] On the driving disk, a first card hole for the latch pin to be inserted is provided at a position corresponding to the driving component closing the smoke baffle, and a second card hole for the latch pin to be inserted is provided at a position corresponding to the driving component opening the smoke baffle.

[0013] In order to keep the relative limiting relationship between the latch pin and the driving disk under non-essential conditions and avoid abnormal states such as the smoke baffle being unable to close, a first elastic member is provided in the installation cavity, and the first elastic member has a tendency to elastically press the movable block towards the driving disk.

[0014] Simply structured, the first elastic member is sleeved on the outer periphery of the movable block, and the first elastic member is arranged on the side of the movable block away from the driving disk.

[0015] In order to be able to give an effective reminder when the smoke baffle cannot be opened, a ventilation port communicating with the outside air and generating sound based on air flow is opened on the installation cavity.

[0016] In order to make the user operation simpler and more labor-saving, the driving component includes a second member and a ventilation switch;

[0017] On the second member, a first air port facing the blower and a second air port communicating with the first air port are provided; on the side wall of the first member away from the driving disk, a third air port communicating with the installation cavity is provided; the ventilation switch is respectively connected to the second air port and the third air port to conduct and close the gas communication between the second air port and the third air port.

[0018] As an improvement, the ventilation switch includes

[0019] A base with a slideway cavity inside, and a first air hole and a second air hole respectively communicating with the slideway cavity and opposite are provided on the base;

[0020] A core column is slidably and reciprocally arranged in the slideway cavity, and an air passage that can be docked with the first air hole and the second air hole based on sliding is provided on the core column;

[0021] A driving member is arranged in the slideway cavity and is linked with the core column.

[0022] Optionally, the driving member is a coil, a magnetic member interacting with the coil is provided in the core column, and a second elastic member is provided between the coil and the core column, and the second elastic member has a tendency to drive the core column in a direction deviating from the first air hole and the second air hole from the air passage; and / or

[0023] The driving member is an operating member facing the core column and partially protruding out of the base. A third elastic member is arranged between the operating member and the core column, and the third elastic member has a tendency to drive the core column away from the first air hole and the second air hole towards the air duct.

[0024] In order to provide guidance for the rotation of the latch pin equivalent to the driving disc when the smoke baffle rotates, a guiding groove is provided along the circumference of the driving disc, and the first engaging hole and the second engaging hole are opened in the guiding groove.

[0025] For the convenience of assembly, two sets of first engaging holes and second engaging holes are correspondingly provided on the driving disc.

[0026] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is as follows: An oil fume extractor includes a casing having an air inlet, a smoke baffle covering the air inlet, and a blower arranged in the casing, and is characterized in that: it further includes the smoke baffle driving mechanism as described above.

[0027] Compared with the prior art, the advantages of the present invention are as follows: In the smoke baffle driving mechanism of the present invention, during use, if a motor failure occurs and the motor cannot operate, the user can make the latch pin disengage from the driving disc by operating the movable block, so that the driving arm can operate, and then open the smoke baffle, avoiding the situation that the oil fume extractor cannot be used this time, and ensuring the normal operation of the oil fume extractor before the motor is repaired.

[0028] The oil fume extractor applying the smoke baffle driving mechanism can avoid the situation that the smoke baffle is locked when the motor fails, resulting in the oil fume extractor being unable to be used normally, and improves the user-friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is an internal view of the smoke baffle driving mechanism in an embodiment of the present invention.

[0030] Figure 2 It is an internal structure diagram of the oil fume extractor in an embodiment of the present invention.

[0031] Figure 3 It is a partial exploded view of the smoke baffle driving mechanism in an embodiment of the present invention.

[0032] Figure 4 It is a cross-sectional view of the first component in an embodiment of the present invention.

[0033] Figure 5 It is a three-dimensional view of the ventilation switch in an embodiment of the present invention.

[0034] Figure 6 It is a cross-sectional view of the ventilation switch in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] The smoke baffle driving mechanism in this embodiment can be applied to a range hood and cooperate with the smoke baffle 10 of the range hood to work. This smoke baffle driving mechanism can be applied to various range hoods. In this embodiment, a range hood is taken as an example to describe in detail the smoke baffle driving mechanism and the range hood.

[0037] As Figure 1 and Figure 2 shown, a range hood includes a casing 8 having an air inlet 81, a smoke baffle 10 covering the air inlet 81, a blower 9 provided in the casing 8, and a smoke baffle driving mechanism connected to the smoke baffle 10 to drive the smoke baffle 10 to act. The range hood provided with the smoke baffle 10 is usually a side suction range hood, and the smoke baffle 10 is in an inclined state and is basically in the same plane as the front side of the casing 8. The upper side edge of the smoke baffle 10 is rotatably connected to the casing 8, and the smoke baffle 10 swings downward to open the air inlet 81, so that the range hood can perform the operation of sucking cooking fumes. After the range hood stops working, the smoke baffle 10 swings upward to close the air inlet 81.

[0038] As Figures 1 to 3 shown, the smoke baffle driving mechanism in this embodiment includes a motor 1, a driving disk 2 fixedly connected to the driving shaft of the motor 1, and a driving arm 3 connected to the driving disk 2 and the smoke baffle 10. During normal use, the motor 1 works, the driving shaft of the motor 1 rotates to drive the driving disk 2 to rotate, and the driving disk 2 drives the driving arm 3 to act, thereby realizing the opening and closing actions of the smoke baffle 10. In the prior art, the driving disk 2 and the driving arm 3 are directly connected. In this way, when the motor 1 fails, the driving disk 2 cannot rotate, and further the limiting driving arm 3 cannot act. When the range hood needs to be used, the smoke baffle 10 cannot be opened, and the cooking fumes cannot enter the range hood, resulting in the range hood being unable to work.

[0039] Based on this, the driving arm 3 in this embodiment is relatively limitedly installed with the driving disk 2. In this way, when the motor 1 fails and the smoke baffle 10 cannot be opened, the driving arm 3 can be disengaged from the limit with the driving disk 2 through the following structure, and then can move to open the smoke baffle 10, so that the range hood can work normally.

[0040] As Figure 4As shown in the figure, the smoke baffle driving mechanism in this embodiment further includes a first member 4, a movable block 5, a driving assembly, and a retaining pin 7. The first member 4 is provided on the driving arm 3 and has an installation cavity 41 inside. The movable block 5 is arranged in the installation cavity 41 and can reciprocate in a direction away from and close to the driving disk 2. The driving assembly is linked with the movable block 5 to drive the movable block 5 to reciprocate relative to the driving disk 2. The retaining pin 7 is connected to the movable block 5. The retaining pin 7 passes through the cavity wall of the installation cavity 41 and the driving arm 3 respectively and is limited on the driving disk 2. A first card hole 21 for the retaining pin 7 to be inserted is provided on the driving disk 2 corresponding to the position where the driving assembly closes the smoke baffle 10. A second card hole 22 for the retaining pin 7 to be inserted is provided on the driving disk 2 corresponding to the position where the driving assembly opens the smoke baffle 10. For the convenience of assembly, two groups of first card holes 21 and second card holes 22 are correspondingly provided on the driving disk 2. When the motor 1 fails and the smoke baffle 10 cannot be automatically opened, the user can operate the driving assembly to make the movable block 5 move away from the driving disk 2, and then drive the retaining pin 7 to drive away from the first card hole 21 on the driving disk 2. Then, the driving arm 3 and the driving disk 2 are in a relatively disengaged state. At this time, the smoke baffle 10 can be based on its own weight or the user manually swings the smoke baffle 10, and then opens the smoke baffle 10 so that the oil fume can enter the interior of the range hood from the smoke inlet. When the smoke baffle 10 is opened in place, the position where the retaining pin 7 is located corresponds to the position of the second card hole 22. The driving assembly then drives the retaining pin 7 to move in a direction close to the driving disk 2, so that the retaining pin 7 is inserted into the second card hole 22 of the driving disk 2, thereby realizing the relative limit between the driving arm 3 and the driving disk 2. At this time, the smoke baffle 10 will not move anymore, ensuring a stable open state of the smoke baffle 10. When the smoke baffle 10 rotates, in order to better limit the stability of the swing of the smoke baffle 10, a guiding groove 23 is provided on the driving disk 2 along the circumferential direction. The first card hole 21 and the second card hole 22 are opened in the guiding groove 23. Thus, when the retaining pin 7 disengages from the first card hole 21 and moves with the opening of the smoke baffle 10, the retaining pin 7 is located in the guiding groove 23. The relative limit of the guiding groove 23 on the retaining pin 7 ensures the stability of the rotation of the smoke baffle 10.

[0041] In order to make the bayonet 7 automatically snap into the second snap hole 22 when it reaches the position aligned with the second snap hole 22, so that the user's operation is simpler, in this embodiment, a first elastic member 411 is provided in the installation cavity 41, and the first elastic member 411 has a tendency to press the movable block 5 toward the direction close to the driving disk 2. Specifically, the first elastic member 411 is arranged on the side of the movable block 5 away from the driving disk 2. In this way, after the bayonet 7 is separated from the first snap hole 21, during the process of opening the smoke shield 10, the bayonet 7 moves along the direction of the guide groove 23. When the bayonet 7 reaches the position of the second snap hole 22, the movable block 5 moves toward the direction close to the driving disk 2 under the spring pressure of the first elastic member 411, and then drives the bayonet 7 to snap into the second snap hole 22, so as to achieve relative limit between the driving arm 3 and the driving disk 2, so that the smoke shield 10 is stably opened. When the smoke baffle 10 needs to be closed, the movable block 5 is driven by the driving assembly to move the movable block 5 away from the driving disk 2, thereby causing the latch 7 to disengage from the second latch hole 22. Then the smoke baffle 10 can be closed manually. When closing the smoke baffle 10, the latch 7 rotates in the guide. When it rotates to the position of the first latch hole 21, based on the spring-pressing effect of the first elastic member 411 on the movable block 5, the latch 7 is latched into the first latch hole 21. At this time, the driving wall and the driving disk 2 are relatively limited, and the smoke baffle 10 no longer moves. At this time, the smoke baffle 10 just closes the smoke inlet.

[0042] The driving assembly in this embodiment can be an operating rod connected to the movable block 5 and operable by the user. However, in order to simplify the operation, the driving assembly in this embodiment adopts a pneumatically driven structure. Specifically, Figure 2 , Figure 5 and Figure 6 As shown, the drive assembly includes a second component 61 and a ventilation switch 62. The second component 61 is provided with a first air port 611 facing the fan 9 and a second air port 612 connected to the first air port 611. A third air port 42 connected to the mounting cavity 41 is provided on the side wall of the first component 4 away from the driving disc 2. The ventilation switch 62 is respectively connected to the second air port 612 and the third air port 42 to open and close the gas communication between the second air port 612 and the third air port 42. When the fan 9 in the range hood is turned on, if the smoke baffle 10 cannot be opened due to a fault in the motor 1, the ventilation switch 62 is operated to connect the gas between the second air port 612 and the third air port 42, so that the third air port 42 is in a negative pressure state, and the movable block 5 moves toward the third air port 42, so that the latch 7 moves away from the drive disk 2 and enters the disengagement from the drive disk 2. At this time, the drive arm 3 is relatively disengaged from the drive disk 2, and the smoke baffle 10 can be opened based on its own weight or the manual movement of the user. As mentioned above, when the latch 7 is moved to the position aligned with the second latch hole 22, the latch 7 pops into the second latch hole 22, and the smoke baffle 10 opens in place.

[0043] The ventilation switch 62 can be set as an electronic device, such as a switching valve. In order to reduce costs, the ventilation switch 62 can also adopt a mechanical structure. The ventilation switch 62 in this embodiment adopts a mechanical structure. Specifically, the ventilation switch 62 includes a base 621 with a slideway cavity 6211 inside. First air holes 6212 and second air holes 6213 that are respectively connected to the slideway cavity 6211 and are opposite to each other are formed on the base 621; a core column 622 is slidably and reciprocally arranged in the slideway cavity 6211, and an air passage 6221 that can be docked with the first air holes 6212 and the second air holes 6213 based on sliding is formed on the core column 622; a driving member is arranged in the slideway cavity 6211 and is linked with the core column 622.

[0044] The driving member can adopt at least one of the following structures. One is a coil 623. A magnetic member 6222 that interacts with the coil 623 is arranged inside the core column 622. A second elastic member 624 is arranged between the coil 623 and the core column 622. The second elastic member 624 has a tendency to drive the core column 622 in a direction deviating from the first air holes 6212 and the second air holes 6213 towards the air passage 6221. Another driving member is an operating member 625 that faces the core column 622 and partially extends out of the base 621. A third elastic member 626 is arranged between the operating member 625 and the core column 622. The third elastic member 626 has a tendency to drive the core column 622 in a direction deviating from the first air holes 6212 and the second air holes 6213 towards the air passage 6221. When using the coil 623 to drive the core column 622, the coil 623 can be powered on. Based on the magnetic attraction between the coil 623 and the magnetic member 6222, the core column 622 is driven to move, and then the core column 622 moves to a position opposite to the first air holes 6212 and the second air holes 6213, thereby realizing the ventilation connection between the second air port 612 and the third air port 42. When the coil 623 loses power, the core column 622 resets, and the first air holes 6212 and the second air holes 6213 are in a non-conducting state, and the corresponding second air port 612 and the second air port 612 are disconnected. When the driving member is the operating member 625, it is usually set as a button. When the user manually presses the button, the operating member 625 will drive the core column 622 to move and conduct the first air holes 6212 and the second air holes 6213. When the user releases it, the core column 622 resets based on the third elastic member 626, and the first air holes 6212 and the second air holes 6213 are disconnected.

[0045] As Figure 4 shown, in addition, a ventilation port 412 that is connected to the outside air and generates sound based on the airflow is formed on the installation cavity 41. When the fan 9 is turned on and the motor 1 cannot work, the ventilation port 412 can emit a buzzing sound based on the airflow, thereby prompting the situation that the smoke baffle 10 is not opened.

[0046] When the range hood in this embodiment is in use, the user turns on the range hood, and the corresponding fan 9 starts to work. The motor 1 works to drive the smoke baffle 10 to open. If the smoke baffle 10 fails to open, it is determined that the motor 1 is faulty. At this time, the user can operate the aforementioned drive assembly to open the smoke baffle 10, ensuring the normal use of the range hood this time. At the same time, the user can contact the service technician for repairing the motor 1 as needed.

[0047] In the smoke baffle drive mechanism of the present invention, during use, if the motor 1 fails and cannot operate, the user can make the latch 7 disengage from the drive disk 2 by operating the movable block 5, so that the drive arm 3 can operate, and then open the smoke baffle 10, avoiding the situation that the range hood cannot be used during that time, and ensuring the normal operation of the range hood before the repair of the motor 1 is completed.

[0048] The range hood applying this smoke baffle drive mechanism can avoid the situation that the range hood cannot be used normally due to the smoke baffle 10 being locked when the motor 1 fails, improving the user-friendliness.

Claims

1. A smoke baffle driving mechanism, comprising a motor (1), a driving disc (2) fixedly connected to the driving shaft of the motor (1), and a driving arm (3) connected to the driving disc (2) and the smoke baffle (10); It is characterized in that: It further comprises a first member (4) provided on the driving arm (3) and having an installation cavity (41) inside; a movable block (5) disposed in the installation cavity (41) and capable of reciprocatingly moving in a direction away from and towards the driving disc (2); a driving assembly that is linked with the movable block (5) to drive the movable block (5) to reciprocate relative to the driving disc (2); a retaining pin (7) connected to the movable block (5), and the retaining pin (7) passes through the cavity wall of the installation cavity (41) and the driving arm (3) respectively and is limited on the driving disc (2); A first card hole (21) for the retaining pin (7) to be inserted is provided on the driving disc (2) corresponding to the position where the driving assembly closes the smoke baffle (10), and a second card hole (22) for the retaining pin (7) to be inserted is provided on the driving disc (2) corresponding to the position where the driving assembly opens the smoke baffle (10).

2. The smoke baffle driving mechanism according to claim 1, characterized in that: A first elastic member (411) is provided in the installation cavity (41), and the first elastic member (411) has a tendency to elastically press the movable block (5) towards the driving disc (2).

3. The smoke baffle drive mechanism according to claim 2, characterized in that: The first elastic member (411) is disposed on the side of the movable block (5) away from the driving disc (2).

4. The smoke baffle driving mechanism according to claim 1, characterized in that: An air vent (412) that is connected to the outside air and generates sound based on air flow is provided on the installation cavity (41).

5. The smoke baffle driving mechanism according to any one of claims 1 to 4, characterized in that: The driving assembly includes a second member (61) and an air vent switch (62); A first air port (611) facing the fan (9) and a second air port (612) communicating with the first air port (611) are provided on the second member (61); A third air port (42) communicating with the installation cavity (41) is provided on the side wall of the first member (4) away from the driving disc (2); The air vent switch (62) is respectively connected to the second air port (612) and the third air port (42) to conduct and cut off the gas communication between the second air port (612) and the third air port (42).

6. The smoke baffle driving mechanism according to claim 5, wherein: The air vent switch (62) includes a base (621) having a slideway cavity (6211) inside, and a first air hole (6212) and a second air hole (6213) that are respectively communicated with the slideway cavity (6211) and are opposite to each other are provided on the base (621); a core column (622) slidably and reciprocatingly arranged in the slideway cavity (6211), and an air passage (6221) that can be docked with the first air hole (6212) and the second air hole (6213) based on sliding is provided on the core column (622); a driving member disposed in the slideway cavity (6211) and linked with the core column (622).

7. The smoke baffle driving mechanism according to claim 6, characterized in that: The driving member is a coil (623), a magnetic member (6222) interacting with the coil (623) is provided in the core column (622), a second elastic member (624) is provided between the coil (623) and the core column (622), and the second elastic member (624) has a tendency to drive the core column (622) in a direction deviating from the first air hole (6212) and the second air hole (6213) towards the air duct (6221); and / or The driving member is an operating member (625) arranged facing the core column (622) and partially protruding out of the base (621), a third elastic member (626) is arranged between the operating member (625) and the core column (622), and the third elastic member (626) has a tendency to drive the core column (622) in a direction deviating from the first air hole (6212) and the second air hole (6213) towards the air duct (6221).

8. The smoke baffle driving mechanism according to any one of claims 1 to 4, characterized in that: A guiding groove (23) is provided along the circumferential direction on the driving disc (2), and the first clamping hole (21) and the second clamping hole (22) are formed in the guiding groove (23).

9. The smoke baffle driving mechanism according to any one of claims 1 to 4, characterized in that: Two groups of first clamping holes (21) and second clamping holes (22) are correspondingly provided on the driving disc (2).

10. An oil fume suction machine, comprising a casing (8) having an air inlet (81), a smoke baffle (10) covering the air inlet (81), and a blower (9) disposed in the casing (8), characterized in that: It further includes a smoke baffle driving mechanism according to any one of claims 1 to 9.

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