A smoke exhaust check valve

Abstract

The utility model relates to a kind of exhaust valve technical field, specifically speaking, a kind of exhaust valve, including valve body, blade is equipped in valve body, the side wall of valve body is equipped with fault indicating box, the pivot of blade is from the side wall of valve body and is inserted into fault indicating box, pivot end side wall is equipped with pressure rod;Fault indicating box is equipped with touch switch, touch switch is connected with indicating lamp and power supply;Valve body works, blade rotates and drives pressure rod to rotate, pressure rod is pressed to touch switch, makes circuit intercommunication, indicating lamp is bright.Exhaust valve is located outside the whole range hood, when needing maintenance, without disassembling range hood.Just the upper ventilation pipe is unloaded, after maintenance, it can be sealed with adhesive tape again.Exhaust valve is started by the turning of blade, indicating lamp reacts the working state of blade, and reflects the emergence of fault at any time.Indicating lamp is only lighted when range hood works, and power is saved.Compared with the cost of cleaning range hood, the cost of installing the product of the application is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically a smoke exhaust check valve, which is mainly used in the smoke exhaust pipe of a range hood. Background Technology

[0002] Modern household range hoods typically have backflow preventers installed inside the air outlet. Over time, a large amount of sticky grease accumulates on the valve blades. If the range hood is not used for a period of time (such as during a holiday trip), the valve blades may stick to the body and fail to open freely. When the fan is operating normally, it cannot effectively exhaust smoke, and the sucked-in fumes are blown back through the air inlet, causing widespread pollution in the kitchen and surrounding area. When faced with this problem, most people choose to hire someone to clean the range hood. However, they don't realize that the problem lies solely with the backflow preventer. Cleaning the entire range hood solves the problem, but the real issue lies with the valve itself.

[0003] When the power and electronic systems of the range hood are functioning normally, the malfunction of the check valve is the biggest problem for users. Summary of the Invention

[0004] To address the problem in existing technologies where it is impossible to distinguish whether a check valve is stuck together and therefore cannot be opened freely, this utility model provides a smoke exhaust check valve.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a smoke exhaust check valve, including a valve body, a blade provided inside the valve body, a fault indicator box provided on the side wall of the valve body, the rotating shaft of the blade passing through the side wall of the valve body and extending into the fault indicator box, and a pressure rod installed on the side wall of the end of the rotating shaft; The fault indicator box is equipped with a touch switch, which is connected to the indicator light and the power supply. When the valve body is working, the vane rotates, which drives the pressure rod to rotate. The pressure rod applies pressure to the touch switch, connecting the circuit and illuminating the indicator light.

[0006] Furthermore, valve seats are provided on both radial sides of the valve body for mounting blades.

[0007] Furthermore, the fault indicator box is equipped with a partition for installing a touch switch.

[0008] Furthermore, the blade's rotation axis is located on one side of the partition. The touch switch includes a contact and a metal spring sheet, which are mounted on the side wall of the partition. The metal spring sheet is pressed by a pressure rod to make it contact the contact.

[0009] Furthermore, there are two blades, and a torsion spring is provided between the two blades, with the end of the torsion spring abutting against the back of the blade.

[0010] Furthermore, the blade's rotation axis is located on both sides of the partition. The touch switch includes contacts and metal spring sheets. A pair of contacts and metal spring sheets are provided on both sides of the partition. The metal spring sheets are pressed by the pressure rod to make them contact the contacts.

[0011] Furthermore, the touch switch is a reset switch.

[0012] Furthermore, there are two touch switches, which are connected in parallel or in series.

[0013] Compared with existing technologies, the advantages of this invention are as follows: the exhaust backflow preventer valve is located outside the range hood, eliminating the need to disassemble the range hood for maintenance. Simply remove the upper ventilation pipe, maintain it, and then reconnect it, sealing it with tape. The switch is activated by the movement of the blades, with indicator lights reflecting the blades' working status and promptly indicating any malfunctions. The indicator lights only illuminate when the range hood is operating, saving energy. Compared to the cost of cleaning a range hood, the cost of installing this product is significantly reduced. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the smoke exhaust check valve provided by this utility model; Figure 2 An external schematic diagram of the smoke exhaust check valve provided by this utility model; Figure 3 A schematic diagram of the internal structure of the fault indicator box of the flue gas anti-reverse valve provided by this utility model; Figure 4 A schematic diagram of the internal connection of the fault indicator box of the flue gas anti-reverse valve provided by this utility model; Figure 5 The fault indicator box of the flue gas anti-backflow valve provided in another embodiment of this utility model is internally connected to... See the diagram below; The components include: blade 1, fault indicator box 2, rotating shaft 3, pressure rod 4, indicator light 5, power supply 6, valve seat 7, partition 8, contact 9, metal spring plate 10, and torsion spring 11. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figures 1-5As shown, this embodiment provides a smoke exhaust check valve, which is an external device of the range hood. Its purpose is to replace the internal check valve and achieve the same working effect as the internal check valve. It has functions such as universality for various range hoods, convenient installation, replaceable blades, and fault indication. The valve body is a PVC cylindrical die-cast part, which can adopt the common valve body structure on the market. One side of the valve body is connected to the air outlet of the range hood, and the other side is connected to the ventilation pipe. In order to meet the connection of exhaust pipes of different diameters, the outlet of the valve body is equipped with a multi-diameter connector. The valve body is equipped with a blade 1, and the side wall of the valve body is equipped with a fault indicator box 2, which is used to indicate the working status of the check valve blade 1. The rotating shaft 3 of the blade 1 extends from the side wall of the valve body into the fault indicator box 2, and a pressure rod 4 is installed on the side wall of the end of the rotating shaft 3. The fault indicator box 2 is equipped with a touch switch, which is connected to the indicator light 5 and the power supply 6. In this embodiment, the touch switch is a reset switch, which automatically disconnects after the lever 4 is removed. The power supply 6 is a battery box, which can be equipped with commercially available alkaline batteries. When the range hood is started, the valve body operates. As the blade 1 gradually opens, it drives the pressure rod 4 to rotate. The pressure rod 4 applies pressure to the touch switch, connecting the circuit. The power supply 6 supplies power to the indicator light 5, and the indicator light 5 illuminates, indicating that the blade is working normally. If there is a lot of oil on the blade 1, it cannot open or the opening angle is insufficient. The pressure rod 4 cannot apply pressure to the touch switch, and the indicator light 5 does not illuminate. The user can then know that there is a lot of oil in the exhaust check valve, and the blade 1 needs to be disassembled for cleaning or replaced with a new blade 1.

[0017] In another embodiment of this application, valve seats 7 are provided on both radial sides of the valve body for mounting blades 1.

[0018] In another embodiment of this application, reference is made to Figure 4 and Figure 5 The fault indicator box 2 is equipped with a partition 8 for installing a touch switch. Due to the position of the rotating shaft 3, the touch switch cannot be directly fixed to the outer wall of the valve body. Therefore, the partition 8 is fixed to the valve body and the touch switch is fixed to the side wall of the partition 8. The blade 1 rotates, which drives the pressure rod 4 to rotate, applying pressure to the touch switch and connecting the circuit.

[0019] In another embodiment of this application, when the smoke exhaust check valve adopts a single blade 1 structure, the rotating shaft 3 of the blade 1 is located on one side of the partition 8. The touch switch includes a contact 9 and a metal spring plate 10. The contact 9 and the metal spring plate 10 are installed on the side wall of the partition 8. When the smoke exhaust check valve is working, the rotating shaft 3 rotates to drive the pressure rod 4 to apply pressure to the metal spring plate 10 so that the metal spring plate 10 contacts the contact 9, and the indicator light 5 lights up.

[0020] In another embodiment of this application, there are two blades 1, and a torsion spring 11 is provided between the two blades 1, with the end of the torsion spring 11 abutting against the back of the blade 1.

[0021] In another embodiment of this application, when the smoke exhaust check valve adopts a structure with two blades 1, the rotating shaft 3 of the blade 1 is located on both sides 8 of the partition plate. The touch switch includes a contact 9 and a metal spring plate 10. A pair of contacts 9 and metal spring plates 10 are provided on both sides of the partition plate 8. When the smoke exhaust check valve is working, the rotating shaft 3 rotates and drives the pressure rod 4 to apply pressure to the metal spring plate 10 so that the metal spring plate 10 contacts the contact 9, and the indicator light 5 lights up.

[0022] In another embodiment of this application, when the smoke exhaust check valve adopts a structure with two blades 1, any malfunction of either blade 1 requires indication by an indicator light 5. This necessitates two touch switches, which can be connected in parallel or in series. When connected in series, refer to... Figure 4 If any blade fails to open or opens to an insufficient angle, the indicator light will not illuminate; when connected in parallel, refer to... Figure 5 The operating status of the two blades is indicated separately.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smoke exhaust check valve, comprising a valve body, wherein a blade (1) is provided within the valve body, characterized in that: The valve body sidewall is provided with a fault indicator box (2), and the rotating shaft (3) of the blade (1) extends through the valve body sidewall and into the fault indicator box (2). A pressure rod (4) is installed on the sidewall of the end of the rotating shaft (3). A touch switch is installed inside the fault indicator box (2), and the touch switch is connected to the indicator light (5) and the power supply (6); When the valve body is working, the blade (1) rotates, which drives the pressure rod (4) to rotate. The pressure rod (4) applies pressure to the touch switch, so that the circuit is connected and the indicator light (5) lights up.

2. The smoke exhaust check valve according to claim 1, characterized in that: The valve body is provided with valve seats (7) on both radial sides for mounting blades (1).

3. The smoke exhaust check valve according to claim 1, characterized in that: The fault indicator box (2) is equipped with a partition (8) for installing a touch switch.

4. The smoke exhaust check valve according to claim 3, characterized in that: The rotating shaft (3) of the blade (1) is located on one side of the partition (8). The touch switch includes a contact (9) and a metal spring sheet (10). The contact (9) and the metal spring sheet (10) are installed on the side wall of the partition (8). The metal spring sheet (10) is pressed by the pressure rod (4) so ​​that the metal spring sheet (10) contacts the contact (9).

5. The smoke exhaust check valve according to claim 3, characterized in that: There are two blades (1), and a torsion spring (11) is provided between the two blades (1). The end of the torsion spring (11) abuts against the back of the blade (1).

6. The smoke exhaust check valve according to claim 5, characterized in that: The rotating shaft (3) of the blade (1) is located on both sides of the partition (8). The touch switch includes a contact (9) and a metal spring sheet (10). A pair of contacts (9) and a metal spring sheet (10) are provided on both sides of the partition (8). The metal spring sheet (10) is pressed by the pressure rod (4) so ​​that the metal spring sheet (10) contacts the contact (9).

7. The smoke exhaust check valve according to claim 1, characterized in that: The touch switch is a reset switch.

8. The smoke exhaust check valve according to claim 1, characterized in that: The number of touch switches is two, and the two touch switches are connected in parallel or in series.

Images