Electric flue check valve

Abstract

The utility model relates to the technical field of check valves, in particular to a flue electric check valve which comprises an air door assembly, a check valve element is arranged on the periphery of the air door assembly, a base is connected to the bottom of the check valve element in a clamped mode, a first variable-diameter ring is connected to the top of the check valve element in a clamped mode, and a second variable-diameter ring is connected to the top of the check valve element in a clamped mode. The second variable-diameter ring is positioned in the first variable-diameter ring; according to the electric check valve for the flue, the air door assembly is mainly arranged, the phenomenon that an air door leaf plate cannot be opened or cannot be completely closed after being used for a period of time can be effectively avoided, a traditional air door leaf plate is replaced with the integrated sealing plate, the sealing performance is better, and the sealing effect is better. And the situations of odor pouring and odor tainting caused by a gap at the closed part are avoided.

Description

Technical Field

[0001] The utility model relates to the field of check valves, in particular to an electric flue check valve. Background Technique

[0002] The electric flue check valve is an intelligent device that combines the functions of a motor and a check valve, aiming to prevent the backflow of oil fumes and ensure the normal operation of the flue system. When the range hood is working, the motor drives the check valve to open, ensuring the smooth discharge of oil fumes; after the range hood stops, the check valve automatically closes under the action of a spring, effectively blocking the backflow of oil fumes and ensuring fresh air in the kitchen. In addition, the electric flue check valve also has fire prevention performance and can automatically close the valve under specific conditions to prevent the spread of fire, providing additional protection for household safety. This product is widely used in modern residential construction and has become an important part of improving the living quality.

[0003] Most of the existing electric check valves adopt traditional air door leaf plates. After long-term use, the air door leaf plates are prone to the phenomenon that they cannot be opened or cannot be completely closed when opened. There is a lack of corresponding structures in this regard and improvement and optimization are needed. Content of the Utility Model

[0004] The purpose of the utility model is to provide an electric flue check valve to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An electric flue check valve includes an air door assembly. A check valve core is arranged on the periphery of the air door assembly. A base is clamped at the bottom of the check valve core. A first reduced-diameter ring is clamped at the top of the check valve core. A second reduced-diameter ring is clamped at the top of the check valve core, and the second reduced-diameter ring is located inside the first reduced-diameter ring.

[0006] Preferably, a valve core motor is threadedly connected to the circumferential surface of the check valve core. A motor cover is threadedly connected to the circumferential surface of the check valve core, and the valve core motor is located inside the motor cover. The valve core motor is electrically connected to a power box socket, and the power box socket is electrically connected to a power plug. A lower fixed shaft seal cover is threadedly connected to the circumferential surface of the check valve core.

[0007] Preferably, the air door assembly includes a circular air door, an upper positioning rotating shaft of the air door, a lower fixed shaft for the rotation of the air door, and sealing silica gel. The circular air door is sleeved inside the check valve core. The bottom end of the circular air door is threadedly connected to the upper positioning rotating shaft of the air door, and the upper positioning rotating shaft of the air door is electrically connected to the valve core motor. The bottom end of the circular air door is threadedly connected to the lower fixed shaft for the rotation of the air door. Sealing silica gel is arranged on the circumferential surface of the circular air door.

[0008] Preferably, the circular air damper is correspondingly arranged with the check valve core and used in cooperation. The positioning rotating shaft on the air damper penetrates through the check valve core and extends into the interior of the motor cover, and the rotating lower fixed shaft of the air damper penetrates through the check valve core and extends into the interior of the lower fixed shaft seal cover.

[0009] Preferably, the positioning rotating shaft on the air damper and the rotating lower fixed shaft of the air damper are correspondingly arranged and used in cooperation. The sealing silica gel is provided with three layers and has a certain compression amount.

[0010] Preferably, mounting holes are provided at the corners of the base. The number of the mounting holes is four, and they are symmetrically arranged at the corners of the base. The bottom end of the base is threadedly connected with adjustable spring mounting brackets. The number of the adjustable spring mounting brackets is two, and they are symmetrically arranged at the bottom end of the base.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] A flue electric check valve proposed by the present utility model mainly effectively avoids the phenomenon that the air damper leaf plate cannot be opened or cannot be fully closed after a period of use through the setting of the air damper assembly. The integrated sealing plate replaces the traditional air damper leaf plate and has better sealing performance, avoiding the situation of odor inversion and smell mixing due to gaps at the closing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a structural schematic diagram of a flue electric check valve;

[0014] Figure 2 is a bottom structural schematic diagram of a flue electric check valve;

[0015] Figure 3 is a structural schematic diagram of the air damper assembly of a flue electric check valve;

[0016] Figure 4 is a structural schematic diagram of the motor cover of a flue electric check valve.

[0017] In the figure: 1, base; 2, check valve core; 3, air damper assembly; 301, circular air damper; 302, positioning rotating shaft on the air damper; 303, rotating lower fixed shaft of the air damper; 304, sealing silica gel; 4, motor cover; 5, lower fixed shaft seal cover; 6, power supply box socket; 7, power plug; 8, first reducing ring; 9, second reducing ring; 10, adjustable spring mounting bracket; 11, valve core motor; 12, mounting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to clearly and completely describe the purpose, technical solution of the present utility model and make the advantages more clearly understood, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present utility model, rather than all of the embodiments, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1 - 4 , the present utility model provides embodiments of the following four preferred solutions:

[0020] Embodiment 1: An electric flue check valve includes a damper assembly 3. A check valve core 2 is arranged around the damper assembly 3. A base 1 is clamped at the bottom of the check valve core 2. A first reduced diameter ring 8 is clamped at the top of the check valve core 2. A second reduced diameter ring 9 is clamped at the top of the check valve core 2, and the second reduced diameter ring 9 is located inside the first reduced diameter ring 8. A convex groove is designed at the connecting outer diameter of the check valve core 2 with the first reduced diameter ring 8 and the second reduced diameter ring 9. The tight mating and insertion connection of the check valve core 2 with the groove can effectively solve the problems of smoke leakage, odor mixing or detachment caused by wind resistance of the product.

[0021] Embodiment 2: On the basis of Embodiment 1, a valve core motor 11 is threadedly connected to the circumferential surface of the check valve core 2. A motor cover 4 is threadedly connected to the circumferential surface of the check valve core 2, and the valve core motor 11 is located inside the motor cover 4. The valve core motor 11 is electrically connected to a power supply box socket 6. An electronic control board is arranged inside the power supply box socket 6. An AC current transformer and a single-chip microcomputer are arranged on the electronic control board. The power supply box socket 6 is electrically connected to a power plug 7. The power plug 7 accesses the indoor 220V power supply, and its power supplies the power supply box socket 6. The AC current transformer is connected to the single-chip microcomputer, the control line of the single-chip microcomputer is connected to the valve core motor 11, the rotating shaft of the valve core motor 11 drives the upper positioning rotating shaft 302 of the circular damper 301 of the circular damper, the upper positioning rotating shaft 302 drives the circular damper 301 to rotate, and the circular damper 301 is controlled by the single-chip microcomputer to drive the valve core motor 11 to perform the opening and closing actions. A lower fixed shaft sealing cover 5 is threadedly connected to the circumferential surface of the check valve core 2.

[0022] Embodiment 3: On the basis of Embodiment 1, the air damper assembly 3 includes a circular air damper 301, an upper positioning rotating shaft 302 of the air damper, a lower fixed rotating shaft 303 of the air damper rotation, and a sealing silica gel 304. The circular air damper 301 is sleeved inside the check valve core 2. The circular air damper 301 is correspondingly arranged with the check valve core 2 and used in cooperation. The bottom end of the circular air damper 301 is threadedly connected with the upper positioning rotating shaft 302 of the air damper. The upper positioning rotating shaft 302 of the air damper penetrates through the check valve core 2 and extends into the interior of the motor cover 4. The upper positioning rotating shaft 302 of the air damper is electrically connected to the valve core motor 11. The bottom end of the circular air damper 301 is threadedly connected with the lower fixed rotating shaft 303 of the air damper rotation. The lower fixed rotating shaft 303 of the air damper rotation penetrates through the check valve core 2 and extends into the interior of the lower fixed shaft sealing cover 5. The upper positioning rotating shaft 302 of the air damper and the lower fixed rotating shaft 303 of the air damper rotation are correspondingly arranged and used in cooperation. The sealing silica gel 304 is arranged on the circumferential surface of the circular air damper 301. The sealing silica gel 304 is provided with three layers and has a certain compression amount, with good sealing performance, which can effectively solve the problem of smoke leakage and odor mixing caused by the gap between the edge of the circular air damper 301 and the check valve core 2.

[0023] Embodiment 4: On the basis of Embodiment 1, mounting holes 12 are provided at the corners of the base 1. The number of the mounting holes 12 is four, and they are symmetrically arranged at the corners of the base 1. The bottom end of the base 1 is threadedly connected with an adjustable spring mounting bracket 10. The adjustable spring mounting bracket 10 can effectively solve the inconvenience in installation caused by different hole sizes, which is convenient for the master to fix effectively and quickly during installation. The number of the adjustable spring mounting brackets 10 is two, and they are symmetrically arranged at the bottom end of the base 1. The double ports of the base 1 are tightly paired and inserted for sealed connection, which can effectively solve the problems of smoke leakage, odor mixing or detachment caused by wind resistance when the products are inserted.

[0024] During actual use, when the fan of the range hood is turned on, the fan starts to work. Then, an AC current transformer connected to the range hood fan is used to detect whether the range hood fan is running. The valve core motor 11 is controlled by a single-chip microcomputer to open or close the circular air damper 301 to achieve fully automatic intelligent operation. The AC current transformer converts the weak current signal into a voltage signal and feeds it back to the single-chip microcomputer. After receiving the signal, the single-chip microcomputer determines that the fan has started working, and then issues an operation instruction to the valve core motor 11. The valve core motor 11 drives the circular air damper 301 to rotate through the upper positioning rotating shaft 302 of the circular air damper 301. When the circular air damper 301 rotates to the maximum angle greater than 90 degrees and the upper positioning rotating shaft 302 is rotated to the set limit position, the circular air damper 301 is completely opened to discharge waste gas.

[0025] When the range hood stops working, the AC current transformer detects a decrease in current, and the voltage fed back to the single-chip microcomputer also decreases accordingly. The single-chip microcomputer determines that the range hood has stopped working and sends a signal to the valve core motor 11 to close the circular air damper 301. At this time, when the circular air damper 301 receives the closing signal, it will delay for 15 seconds and then close automatically after the exhaust gas is exhausted.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue electric check valve, characterized in that: The invention comprises a damper assembly (3), wherein a check valve core (2) is arranged on the periphery of the damper assembly (3), a base (1) is clamped on the bottom of the check valve core (2), a first reducing ring (8) is clamped on the top of the check valve core (2), a second reducing ring (9) is clamped on the top of the check valve core (2), and the second reducing ring (9) is located inside the first reducing ring (8).

2. The flue electric check valve according to claim 1, characterized in that: A valve core motor (11) is threadedly connected to the circumferential surface of the check valve core (2), a motor cover (4) is threadedly connected to the circumferential surface of the check valve core (2), and the valve core motor (11) is located inside the motor cover (4), the valve core motor (11) is electrically connected to a power box socket (6), the power box socket (6) is electrically connected to a power plug (7), and a lower fixed shaft sealing cover (5) is threadedly connected to the circumferential surface of the check valve core (2).

3. The flue electric check valve according to claim 1, characterized in that: The damper assembly (3) comprises a circular damper (301), a damper upper positioning shaft (302), a damper rotating lower fixed shaft (303) and a sealing silicone (304); the circular damper (301) is sleeved inside the check valve core (2); the bottom end of the circular damper (301) is threadedly connected to the damper upper positioning shaft (302); the damper upper positioning shaft (302) is electrically connected to the valve core motor (11); the bottom end of the circular damper (301) is threadedly connected to the damper rotating lower fixed shaft (303); and the sealing silicone (304) is provided on the circumferential surface of the circular damper (301).

4. The flue electric check valve according to claim 3, characterized in that: The circular damper (301) is arranged correspondingly to the check valve core (2) and is used in conjunction with the damper. The damper upper positioning shaft (302) penetrates the check valve core (2) and extends to the interior of the motor cover (4). The damper rotating lower fixed shaft (303) penetrates the check valve core (2) and extends to the interior of the lower fixed shaft sealing cover (5).

5. The flue electric check valve according to claim 3, characterized in that: The damper upper positioning shaft (302) and the damper rotating lower fixed shaft (303) are arranged correspondingly and used in conjunction with each other. The sealing silica gel (304) is provided with three layers and has a certain compression amount.

6. The flue electric check valve according to claim 1, characterized in that: The corners of the base (1) are provided with mounting holes (12), the number of the mounting holes (12) being four and symmetrically arranged at the corners of the base (1), the bottom end of the base (1) being threadedly connected with an adjustable spring mounting bracket (10), the number of the adjustable spring mounting bracket (10) being two and symmetrically arranged at the bottom end of the base (1).

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