CN215983036U - Panel device and exhaust fan that opens and shuts - Google Patents

Abstract

The utility model discloses a panel opening and closing device and an exhaust fan, wherein the panel opening and closing device comprises a first panel, a rotating disc, a driving assembly and a second panel, the first panel is used for being connected with a main machine of the exhaust fan, and the first panel is provided with an air inlet; the rotating disc is arranged on the first panel; the driving assembly is arranged on the first panel and is used for driving the rotating disc to rotate; the second panel with the rolling disc is connected, the rolling disc is used for driving the second panel move relative to the first panel, so that the second panel is closed or opened the air inlet can better protect the internal parts of the exhaust fan, and is favorable for ensuring a good use effect.

Description

Panel device and exhaust fan that opens and shuts

Technical Field

The utility model relates to the technical field of exhaust fans, in particular to a panel opening and closing device and an exhaust fan.

Background

The exhaust fan is a kind of air conditioning appliance, also called as a ventilating fan, in which a motor drives blades to rotate to drive airflow so as to exchange indoor air and outdoor air. The purpose of the air exhaust is mainly to remove indoor dirty air, thereby achieving the effect of adjusting temperature and humidity. Fix the exhaust fan in ceiling or wall body usually, the spare part of exhaust fan need with external intercommunication, make the air can be inhaled the exhaust fan, the exhaust fan of correlation technique is through setting up air inlet grille in panel department, can play certain effect of blockking to the great foreign matter of volume, but the spare part of exhaust fan exposes outside for a long time, can not avoid having inside little volume foreign matter entering exhaust fan such as dust, the while still has the temperature, humidity, environmental factor influences such as illumination, cause the consume to inside spare part easily, speed that the spare part is ageing with higher speed, influence the result of use of exhaust fan.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the panel opening and closing device and the exhaust fan, which can better protect internal parts of the exhaust fan and are beneficial to ensuring good use effect.

In a first aspect, an embodiment of the present invention provides a panel opening and closing device, including a first panel, a rotating disc, a driving assembly, and a second panel, where the first panel is used for being connected with an exhaust fan host, and the first panel is provided with an air inlet; the rotating disc is arranged on the first panel; the driving assembly is arranged on the first panel and is used for driving the rotating disc to rotate; the second panel is connected with the rotating disc, and the rotating disc is used for driving the second panel to move relative to the first panel, so that the second panel closes or opens the air inlet.

The panel opening and closing device provided by the utility model at least has the following beneficial effects: the first panel is arranged and can be used for installing the exhaust fan host machine, the exhaust fan host machine is convenient to fix on a ceiling or a wall, the driving assembly and the rotating disc are arranged on the first panel, the driving assembly can output power to drive the rotating disc to rotate, the second panel is connected with the rotating disc, the second panel can move relative to the first panel along with the rotation of the rotating disc, so that the effect of closing or opening the air inlet is achieved, when the exhaust fan normally works, an air inlet channel is formed between the first panel and the second panel, air can be sucked into the air inlet through the air inlet channel, so that the air can enter the interior of the exhaust fan, a good air exchange effect is ensured, when the exhaust fan is stopped, the first panel and the second panel are tightly connected together, the air inlet channel cannot be formed, foreign matters such as dust or insect bodies can be prevented from entering the interior of the exhaust fan through the closed air inlet of the second panel, and the damage to parts is avoided, simultaneously can make the inner space of exhaust fan be in relative inclosed state, reduce the influence of environmental factor, avoid accelerating ageing, can protect the inside spare part of exhaust fan better, be favorable to prolonging the life of exhaust fan, be favorable to guaranteeing good result of use, also can block foreign matter such as dust or polypide simultaneously and get into indoorly, guarantee the cleanness of indoor environment.

According to some embodiments of the utility model, the drive assembly comprises a drive motor and a gear, an output shaft of the drive motor is connected with the gear, the rotary disc is provided with a rack, and the gear and the rack are meshed with each other. The driving motor outputs power to drive the gear to rotate, and the gear and the rack are meshed with each other through the rotating disc, so that transmission connection can be realized, and the rotating disc can perform reciprocating rotation.

According to some embodiments of the present invention, the second panel is provided with a limiting assembly, the limiting assembly includes a limiting block and a fixing column, the rotating disc is provided with a sliding groove, the limiting block is connected with the fixing column, the limiting block abuts against the sliding groove, the first panel is provided with a plurality of positioning portions, and the limiting assembly is inserted into the positioning portions. Through setting up spacing subassembly, the fixed column is fixed to be set up at the second panel and link together with the stopper, through set up the sliding tray at the rolling disc, the stopper offsets with the sliding tray, rotate to different positions when the rolling disc, the stopper also moves the different positions of sliding tray, simultaneously under the limiting displacement of location portion, spacing subassembly can remove for location portion, thereby hide in first panel or stretch out first panel, make the second panel can move for first panel, thereby realize the effect that the second panel is closed or opens the air intake.

According to some embodiments of the present invention, the first panel is provided with a first frame, the plurality of positioning portions are provided on the first frame, the rotating disc is sleeved on the first frame, and the air inlet is provided on the first frame. Through setting up first framework, and set up a plurality of location portions at first framework, can play spacing effect to spacing subassembly, guarantee that spacing subassembly only removes for location portion, locate first framework with the rolling disc cover simultaneously, be convenient for realize being connected of spacing subassembly and sliding tray, be favorable to realizing that the second panel moves for first panel.

According to some embodiments of the utility model, the stopper is provided with a convex portion, the convex portion is connected with the sliding groove, the positioning portion is provided with a slot, and the convex portion is arranged in the slot in a penetrating manner. Through setting up the convex part, at the continuous rotatory in-process of rolling disc, the convex part can slide to different positions along the movable groove, can guarantee the stopper and be connected with the rolling disc, does not influence reciprocating of spacing part again, is provided with the fluting in location portion simultaneously, and the fluting is worn to locate by the convex part, can guarantee that spacing part can be for first panel relative movement, and then realizes the change of second panel and first panel relative position.

According to some embodiments of the utility model, the rotating disc comprises a first rotating disc and a second rotating disc, a lower surface of the first rotating disc is attached to an upper surface of the second rotating disc, the first rotating disc is provided with a first connecting portion, the second rotating disc is provided with a second connecting portion, and the sliding groove is located between the first connecting portion and the second connecting portion. Through setting up first carousel and second carousel, through the lower surface with first carousel and the laminating of the upper surface of second carousel in the assembly, can realize the equipment of rolling disc, set up first connecting portion simultaneously at first carousel, the second carousel is provided with the second connecting portion, first carousel and the mutual matching equipment of second carousel are accomplished, the sliding tray is formed between first connecting portion and second connecting portion promptly, need not to design the fluting in addition, simplify the production processes greatly.

According to some embodiments of the utility model, the first turntable is further provided with a third connecting portion, the second turntable is further provided with a fourth connecting portion, and the third connecting portion is matched with the fourth connecting portion. Through set up third connecting portion and set up fourth connecting portion at the second carousel at first carousel, third connecting portion and fourth connecting portion all are the stair structure of relative setting, and when third connecting portion and fourth connecting portion butt joint, can match each other, structural design is reasonable, assembles simple and conveniently more.

According to some embodiments of the utility model, the fixing column is provided with a detent, and the limiting block is provided with a slot matched with the detent. Through setting up screens and draw-in groove, can realize the fixed connection of fixed column and stopper, easy dismounting can effectively reduce the loaded down with trivial details step of installation.

According to some embodiments of the utility model, the second panel is provided with a second frame, and the first panel is provided with a mounting plate matched with the second frame. Set up bellied second framework through the edge at the second panel, first panel is provided with simultaneously with second framework assorted mounting panel, when the panel device that opens and shuts is in the closed condition, the mounting panel is located between the second framework, first panel and second panel connection are inseparabler to sealed effect has been improved greatly.

In a second aspect, an embodiment of the present invention provides an exhaust fan, including the panel opening and closing device of the first aspect and an exhaust fan main unit, where the exhaust fan main unit is disposed on the first panel.

The exhaust fan provided by the utility model at least has the following beneficial effects: the panel opening and closing device is arranged on the exhaust fan, the panel opening and closing device is provided with the first panel and can be used for installing the exhaust fan host machine and is convenient to fix on a ceiling or a wall, the driving assembly and the rotating disc are arranged on the first panel, the driving assembly can output power so as to drive the rotating disc to rotate, the second panel is connected with the rotating disc, the second panel can move relative to the first panel along with the rotation of the rotating disc so as to play a role of closing or opening the air inlet, when the exhaust fan normally works, an air inlet channel is formed between the first panel and the second panel, air can be sucked into the air inlet through the air inlet channel so as to enter the interior of the exhaust fan, a good ventilation effect is ensured, when the exhaust fan is stopped, the first panel and the second panel are tightly connected together, the air inlet channel cannot be formed, the air inlet is closed through the second panel, and foreign matters such as dust or insect bodies can be prevented from entering the interior of the exhaust fan, avoid causing the damage to spare part, can make the inner space of exhaust fan be in relative airtight state simultaneously, reduce the influence of environmental factor, avoid accelerating ageing, can protect the inside spare part of exhaust fan better, be favorable to prolonging the life of exhaust fan, be favorable to guaranteeing good result of use.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an exploded view of a panel opening and closing apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a panel opening and closing device according to another embodiment of the present invention in a closed state;

fig. 3 is a schematic structural view of a panel opening and closing device according to another embodiment of the present invention in an open state;

FIG. 4 is a partial schematic view of a panel opening and closing device according to another embodiment of the present invention;

FIG. 5 is a top view of a panel opening and closing device according to another embodiment of the present invention in a closed state;

FIG. 6 is a partial schematic view of a panel opening and closing device according to another embodiment of the present invention in a closed state;

FIG. 7 is a top view of a panel opening and closing device in an open state according to another embodiment of the present invention;

FIG. 8 is a partial schematic view of a panel opening and closing device according to another embodiment of the present invention in an open state;

FIG. 9 is a schematic structural view of a rotary disk according to another embodiment of the present invention;

FIG. 10 is an exploded view of a rotating disk according to another embodiment of the present invention;

FIG. 11 is an exploded view of a rotating disk according to another embodiment of the present invention;

FIG. 12 is an exploded view of a stop assembly according to another embodiment of the present invention;

FIG. 13 is an exploded view of a stop assembly according to another embodiment of the present invention;

fig. 14 is a schematic structural view of a panel opening and closing device according to another embodiment of the present invention in an open state;

fig. 15 is a schematic structural diagram of an exhaust fan according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

It will be understood that references to an orientation description, such as an upper, lower, front, rear, left, right, etc., indicate an orientation or positional relationship based on that shown in the drawings or relative to a reference, are only for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be taken as limiting the present invention. Unless otherwise expressly limited, the terms set, mounted, connected and the like are to be construed broadly, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in consideration of the technical details.

In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The embodiments of the present invention will be further explained with reference to the drawings.

Referring to fig. 1 to 3, a first embodiment of the present invention provides a panel opening and closing device 100, including a first panel 200, a rotating disc 300, a driving assembly 400, and a second panel 500, wherein the first panel 200 is used for connecting with a main unit 800 of an exhaust fan, and the first panel 200 is provided with an air inlet 110; the rotary disk 300 is disposed on the first panel 200; the driving assembly 400 is disposed on the first panel 200 and is used for driving the rotating disc 300 to rotate; the second panel 500 is connected to the rotary disk 300, and the rotary disk 300 is used for driving the second panel 500 to move relative to the first panel 200, so that the second panel 500 closes or opens the air inlet 110.

By arranging the first panel 200, the exhaust fan host 800 can be used for being installed, and is convenient to be fixed on a ceiling or a wall, by arranging the driving assembly 400 and the rotary disc 300 on the first panel 200, the driving assembly 400 can output power to drive the rotary disc 300 to rotate, the second panel 500 is connected with the rotary disc 300, along with the rotation of the rotary disc 300, the second panel 500 can move relative to the first panel 200, thereby playing a role of closing or opening the air inlet 110, when the exhaust fan normally works, the air inlet channel 120 is formed between the first panel 200 and the second panel 500, air can be sucked into the air inlet 110 through the air inlet channel 120, thereby entering the interior of the exhaust fan, and ensuring good ventilation effect, when the exhaust fan is stopped, the first panel 200 and the second panel 500 are tightly connected together, the air inlet channel 120 cannot be formed, the air inlet 110 is closed through the second panel 500, can block foreign matter such as dust or polypide and get into inside the exhaust fan, avoid causing the damage to spare part, can make the inner space of exhaust fan be in relative inclosed state simultaneously, reduce the influence of environmental factor, avoid accelerating ageing, can protect the inside spare part of exhaust fan better, be favorable to prolonging the life of exhaust fan, be favorable to guaranteeing good result of use, also can block foreign matter such as dust or polypide simultaneously and get into indoorly, guarantee the cleanness of indoor environment.

It should be noted that the panel opening and closing device 100 has two states of closing and opening, when in the closing state, the edges of the first panel 200 and the second panel 500 are mutually abutted or overlapped, the second panel 500 can shield the air inlet 110, and no obvious gap exists between the first panel 200 and the second panel 500, so that the inside of the exhaust fan is in a relatively closed space, the exhaust fan is prevented from being influenced by external factors when not in operation, and the safety of parts is effectively protected. In the opened state, the edges of the first panel 200 and the second panel 500 are separated from each other, and an air inlet passage 120 is formed, so that air can enter the inside of the exhaust fan from the air inlet 110, thereby achieving the air exchange function.

As shown in fig. 2 to 4, according to some embodiments of the present invention, the driving assembly 400 includes a driving motor 410 and a gear 420, an output shaft of the driving motor 410 is connected with the gear 420, the rotary disk 300 is provided with a rack 600, and the gear 420 and the rack 600 are engaged with each other. The driving motor 410 outputs power to drive the gear 420 to rotate, and the gear 420 and the rack 600 are meshed with each other through the arrangement of the rack 600 on the rotating disc 300, so that transmission connection can be realized, and the rotating disc 300 can perform reciprocating rotation.

It should be noted that, the driving motor 410 is a stepping motor, and has a characteristic of high accuracy of a rotation angle position, and can precisely control the rotation angle of the rotary plate 300, the rack 600 has a plurality of tooth segments, and the rotary plate 300 can rotate to different positions by constantly changing the meshing position of the gear 420 and the tooth segments.

In addition, the first panel 200 is further provided with a mounting part 240, and the driving motor 410 can be firmly fixed on the first panel 200 by connecting the driving motor 410 and the mounting part 240 together, so that the working stability of the driving motor 410 is ensured.

As shown in fig. 5 to 8, according to some embodiments of the present invention, the second panel 500 is provided with a limiting assembly 510, the limiting assembly 510 includes a limiting block 511 and a fixing column 512, the rotating disc 300 is provided with a sliding groove 700, the limiting block 511 is connected with the fixing column 512, the limiting block 511 abuts against the sliding groove 700, the first panel 200 is provided with a plurality of positioning portions 220, and the limiting assembly 510 is inserted into the positioning portions 220. Through setting up spacing subassembly 510, fixed column 512 is fixed to be set up at second panel 500 and link together with stopper 511, through set up sliding tray 700 at rolling disc 300, stopper 511 offsets with sliding tray 700, when rolling disc 300 rotates to different positions, stopper 511 also moves the different positions of sliding tray 700, simultaneously under the limiting displacement of location portion 220, spacing subassembly 510 can move for location portion 220, thereby hide in first panel 200 or stretch out first panel 200, make second panel 500 can move for first panel 200, thereby realize the effect that second panel 500 closed or opened air intake 110.

As shown in fig. 2, 3, 6 and 8, it should be noted that two ends of the sliding groove 700 are located at different height positions of the rotating disc 300, which are respectively a first end 710 and a second end 720, when the limiting block 511 moves to the first end 710, the limiting block 510 is hidden in the first panel 200, edges of the first panel 200 and the second panel 500 are abutted with each other, the air inlet 110 is in a closed state, when the limiting block 511 gradually moves from the first end 710 to the second end 720, the air inlet 110 is turned to an open state, the limiting block 510 gradually extends out of the first panel 200, a separation gap between the second panel 500 and the first panel 200 is also increased continuously until the limiting block 511 abuts against the second end 720, and an opening of the air inlet channel 120 is maximized, which is beneficial to ensuring that air can stably flow into the exhaust fan.

Along with the rotating disc 300 rotates to different positions, the connection position of the limiting component 510 and the rotating disc 300 changes continuously, so that the relative position of the first panel 200 and the second panel 500 changes, the panel opening and closing device 100 can be switched between the closed state and the open state, and the opening size of the air inlet channel 120 is controlled. When the exhaust fan normally works, the limiting component 510 extends out of the first panel 200, an air inlet channel 120 is formed between the first panel 200 and the second panel 500, the air inlet 110 is in an open state, so that air can be normally sucked into the exhaust fan, when the exhaust fan is stopped, the limiting component 510 is hidden in the first panel 200, the first panel 200 and the second panel 500 are tightly connected together, the air inlet 110 is in a closed state, and external foreign matters are effectively separated or the adverse effects of external environmental factors are weakened.

As shown in fig. 1 to 3, according to some embodiments of the present invention, the first panel 200 is provided with a first frame 210, a plurality of positioning portions 220 are provided on the first frame 210, the rotating disc 300 is sleeved on the first frame 210, and the air inlet 110 is provided on the first frame 210. Through setting up first framework 210, and set up a plurality of location portions 220 at first framework 210, can play spacing effect to spacing subassembly 510, guarantee that spacing subassembly 510 only removes for location portion 220, locate first framework 210 with rolling disc 300 cover simultaneously, be convenient for realize being connected of spacing subassembly 510 and sliding tray 700, be favorable to realizing that second panel 500 moves for first panel 200.

As shown in fig. 1, according to some embodiments of the present invention, the limiting block 511 is provided with a protrusion 5111, the protrusion 5111 is connected to the sliding groove 700, the positioning portion 220 is provided with a slot 221, and the protrusion 5111 is inserted into the slot 221. Through setting up convex part 5111, at the in-process that the rolling disc 300 constantly rotated, convex part 5111 can slide to different positions along the activity groove, can guarantee the connection of stopper 511 and rolling disc 300, does not influence the reciprocating of stop part again, is provided with fluting 221 at location portion 220 simultaneously, and convex part 5111 wears to locate fluting 221, can guarantee that stop part can be for first panel 200 relative movement, and then realizes the change of second panel 500 and first panel 200 relative position.

As shown in fig. 9 to 11, according to some embodiments of the present invention, the rotary disk 300 includes a first rotary disk 310 and a second rotary disk 320, a lower surface of the first rotary disk 310 is engaged with an upper surface of the second rotary disk 320, the first rotary disk 310 is provided with a first coupling portion 311, the second rotary disk 320 is provided with a second coupling portion 321, and the sliding groove 700 is located between the first coupling portion 311 and the second coupling portion 321. Through setting up first carousel 310 and second carousel 320, through the lower surface with first carousel 310 and the upper surface laminating of second carousel 320 in the assembly, can realize the equipment of carousel 300, set up first connecting portion 311 at first carousel 310 simultaneously, second carousel 320 is provided with second connecting portion 321, first carousel 310 matches the equipment each other with second carousel 320 and accomplishes, sliding tray 700 forms promptly between first connecting portion 311 and second connecting portion 321, need not to design fluting 221 in addition, the production processes is simplified greatly.

As shown in fig. 10 and 11, according to some embodiments of the present invention, the first rotating disk 310 is further provided with a third connecting portion 312, the second rotating disk 320 is further provided with a fourth connecting portion 322, and the third connecting portion 312 is matched with the fourth connecting portion 322. Through set up third connecting portion 312 and set up fourth connecting portion 322 at first carousel 310 at second carousel 320, third connecting portion 312 and fourth connecting portion 322 all are the step structure of relative setting, and when third connecting portion 312 and fourth connecting portion 322 butt joint, can match each other, structural design is reasonable, assembles simple and convenient more.

As shown in fig. 12 and 13, according to some embodiments of the present invention, the fixing column 512 is provided with a detent 5121, and the limiting block 511 is provided with a slot 5112 matching with the detent 5121. Through setting up screens 5121 and draw-in groove 5112, can realize fixed column 512 and stopper 511's fixed connection, easy dismounting can effectively reduce the loaded down with trivial details step of installation.

As shown in fig. 14, according to some embodiments of the present invention, the second panel 500 is provided with a second frame 520, and the first panel 200 is provided with a mounting plate 230 matched with the second frame 520. Through set up bellied second framework 520 at the edge of second panel 500, first panel 200 is provided with simultaneously with second framework 520 assorted mounting panel 230, when panel device 100 that opens and shuts is in the closure state, mounting panel 230 is located between the second framework 520, and first panel 200 and second panel 500 are connected inseparabler to sealed effect has been improved greatly.

As shown in fig. 1, it should be noted that the first panel 200 is further provided with a wire clamping groove 260 for fixing a power line of the exhaust fan, so that the position can be limited, and the power line is prevented from being loosened. In addition, the inner wall of the first panel 200 is further provided with a plurality of reinforcing ribs 250, which can greatly enhance the structural strength and stability of the first panel 200.

It should be noted that the first panel 200 and the second panel 500 are both square and are all provided with round corners around, corners of the first panel 200 and the second panel 500 are more rounded by setting the round corners, and the first panel and the second panel are not easy to scratch or bump a person during installation.

As shown in fig. 15, the second embodiment of the present invention provides a ventilator, comprising the panel opening and closing device 100 of the first aspect and a ventilator main unit 800, wherein the ventilator main unit 800 is disposed on the first panel 200. The panel opening and closing device 100 is arranged on the exhaust fan, the panel opening and closing device 100 is provided with the first panel 200 and can be used for installing the exhaust fan host 800, the exhaust fan host 800 is convenient to be fixed on a ceiling or a wall, the driving assembly 400 and the rotating disc 300 are arranged on the first panel 200, the driving assembly 400 can output power to drive the rotating disc 300 to rotate, the second panel 500 is connected with the rotating disc 300, along with the rotation of the rotating disc 300, the second panel 500 can move relative to the first panel 200 to play a role of closing or opening the air inlet 110, when the exhaust fan normally works, the air inlet channel 110 is formed between the first panel 200 and the second panel 500, air can be sucked into the air inlet 110 through the air inlet channel 110 and can enter the interior of the exhaust fan, a good air exchange effect is ensured, when the exhaust fan is stopped, the first panel 200 and the second panel 500 are tightly connected together, the air inlet channel 110 cannot be formed, through the closed air intake 110 of second panel 500, can block foreign matter such as dust or polypide and get into inside the exhaust fan, avoid causing the damage to spare part, can make the inner space of exhaust fan be in relative inclosed state simultaneously, reduce the influence of environmental factor, avoid accelerating ageing, can protect the inside spare part of exhaust fan better, be favorable to prolonging the life of exhaust fan, be favorable to guaranteeing good result of use, also can block foreign matter such as dust or polypide and get into indoorly simultaneously, guarantee indoor environment's cleanness.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims (10)

1. The utility model provides a panel device that opens and shuts sets up in the exhaust fan, its characterized in that includes:

the first panel is used for being connected with the exhaust fan host, and is provided with an air inlet;

a rotating disk disposed on the first panel;

the driving assembly is arranged on the first panel and is used for driving the rotating disc to rotate;

the second panel is connected with the rotating disc, and the rotating disc is used for driving the second panel to move relative to the first panel so as to enable the second panel to close or open the air inlet.

2. The panel opening and closing device according to claim 1, wherein the driving assembly comprises a driving motor and a gear, an output shaft of the driving motor is connected with the gear, the rotating disc is provided with a rack, and the gear and the rack are meshed with each other.

3. The panel opening and closing device according to claim 1, wherein the second panel is provided with a limiting assembly, the limiting assembly comprises a limiting block and a fixing column, the rotating disc is provided with a sliding groove, the limiting block is connected with the fixing column and abuts against the sliding groove, the first panel is provided with a plurality of positioning portions, and the limiting assembly penetrates through the positioning portions.

4. The panel opening and closing device according to claim 3, wherein the first panel is provided with a first frame body, the plurality of positioning portions are provided in the first frame body, the rotating disc is sleeved in the first frame body, and the air inlet is provided in the first frame body.

5. The panel opening and closing device according to claim 3, wherein the limiting block is provided with a convex portion connected with the sliding groove, the positioning portion is provided with a slot, and the convex portion is arranged in the slot in a penetrating manner.

6. The panel opening and closing device according to claim 3, wherein the rotating disc comprises a first rotating disc and a second rotating disc, the lower surface of the first rotating disc is attached to the upper surface of the second rotating disc, the first rotating disc is provided with a first connecting portion, the second rotating disc is provided with a second connecting portion, and the sliding groove is located between the first connecting portion and the second connecting portion.

7. The panel opening and closing device according to claim 6, wherein the first rotary disk is further provided with a third connecting portion, the second rotary disk is further provided with a fourth connecting portion, and the third connecting portion is matched with the fourth connecting portion.

8. The panel opening and closing device according to claim 3, wherein the fixing column is provided with a blocking position, and the limiting block is provided with a clamping groove matched with the blocking position.

9. The panel opening and closing apparatus according to claim 1, wherein the second panel is provided with a second frame body, and the first panel is provided with a mounting plate that is matched with the second frame body.

10. An exhaust fan, comprising the panel opening and closing device according to any one of claims 1 to 9 and an exhaust fan main unit, wherein the exhaust fan main unit is disposed on the first panel.

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