Electric non-return air door capable of detecting air pressure

Abstract

The utility model discloses an electric non-return air door capable of detecting air pressure. The electric non-return air door comprises an air duct assembly, two non-return pieces symmetrically arranged in the air duct assembly, a driving device, a control circuit board and a backup battery charging and discharging assembly. The air duct assembly comprises a panel and an air duct arranged in a center hole of the panel in a penetrating mode. The two ends of the air duct are provided with an air inlet used for being communicated with a range hood exhaust pipe and an air outlet used for being communicated with a flue correspondingly. The two non-return sheets are rotatably mounted in the air duct through rotating shafts respectively and used for opening or closing the air duct together; the driving device comprises a shell, a driving motor used for driving the non-return piece to turn over and a transmission gear set used for synchronously transmitting power to the non-return piece. The shell is fixed on the outer wall of the air duct; the control circuit board comprises a driving control unit used for controlling the driving motor to operate, a charging and discharging unit used for charging and discharging the backup battery charging and discharging assembly, and a power supply detection unit used for detecting whether the power adapter supplies power normally or not.

Description

Technical Field

[0001] The utility model relates to an electric anti-reverse air door capable of detecting air pressure, belonging to the technical field of range hoods. Background Art

[0002] The anti-return damper is a device used at the connection between the exhaust duct of the range hood and the flue. Its function is to remove the oil smoke from the range hood and prevent the oil smoke in the flue from returning to the range hood.

[0003] The existing check dampers are divided into two types: mechanical and electric. The mechanical check damper relies on wind pressure to open the check plate. When the wind pressure decreases or negative pressure occurs, the check plate closes. The mechanical check damper has a small exhaust cross-section, and after long-term use, the check effect weakens, causing the oil fume gas in the flue to flow back into the kitchen. The electric check damper relies on the power of the motor to open and close the check plate. Compared with the mechanical check damper, this type of check damper opens more fully and closes more tightly, which greatly improves the exhaust effect and check effect. However, the electric check damper requires an input signal for control. The electric check dampers on the market have two control modes: manual control and range hood linkage control. For manual control, manual intervention is required, which will bring additional workload, and there may be a situation where the check valve loses its function due to forgetting to operate. For the range hood linkage control method, a check valve matching the range hood is required, and a wired or wireless communication method is required, which brings inconvenience in installation and lack of compatibility. Utility Model Content

[0004] In order to solve the above-mentioned technical problems existing in the prior art, the utility model provides an electric check damper which can detect air pressure. The utility model determines whether the range hood is working by the air pressure value, and can operate independently of the range hood. It does not need to be operated by manual switch, wiring or considering compatibility with the range hood.

[0005] The technical solution adopted by the utility model is:

[0006] An electric check damper capable of detecting air pressure, characterized in that it comprises an air duct assembly, two check plates symmetrically arranged in the air duct assembly, a driving device, a control circuit board and a backup battery charging and discharging assembly; wherein:

[0007] The air duct assembly includes a panel and an air duct passing through a central hole of the panel, and the two ends of the air duct are respectively provided with an air inlet for connecting with the exhaust pipe of the range hood and an air outlet for connecting with the flue;

[0008] The two anti-return plates are rotatably installed in the air duct through rotating shafts respectively, so as to open or close the air duct together;

[0009] The driving device comprises a housing, a driving motor for driving the anti-return plate to flip, and a transmission gear set for synchronously transmitting power to the anti-return plate; the housing is fixed to the outer wall of the air duct; the driving motor, the transmission gear set and the control circuit board are all installed in the housing; the transmission gear set comprises a first transmission gear and a second transmission gear, the output end of the driving motor is connected to the first transmission gear, the first transmission gear and the second transmission gear are respectively installed at the ends of the two rotating shafts, and the first transmission gear and the second transmission gear are meshed to realize the synchronous flipping of the two anti-return plates;

[0010] The control circuit board includes a drive control unit for controlling the operation of the drive motor, a charge and discharge unit for charging and discharging a backup battery charge and discharge assembly, and a power supply detection unit for detecting whether a power adapter is supplying power normally. The signal output end of the drive control unit is electrically connected to the signal input end of the drive motor.

[0011] Furthermore, it also includes an air pressure detection module, the data output end of the air pressure detection module is electrically connected to the data input end of the drive control unit, and the air pressure detection module is electrically connected to the control circuit board; the air pressure detection module is located in a shell between the control circuit board and the check valve air duct, and a ventilation hole is opened on the shell between the air pressure detection module and the air duct to ensure the transmission of air pressure.

[0012] The air pressure detection module is used to detect the air pressure in the air duct. When the air pressure sensor detects that the air pressure is greater than a certain value, the control board determines that the range hood starts working, that is, the output signal opens the blades of the check valve; when the air pressure sensor detects that the air pressure is less than a certain value, the control board determines that the range hood stops working, that is, the output signal closes the blades of the check valve, thereby achieving the effect of air non-return.

[0013] Furthermore, the backup battery charge and discharge assembly is arranged in the shell, and the charge and discharge port of the backup battery charge and discharge assembly is electrically connected to the charge and discharge connection port of the drive control unit through the charge and discharge unit; when the drive control unit determines that the external power adapter is powered on, the backup battery charge and discharge assembly is in a charging state; when the drive control unit determines that the external power adapter is powered on, the backup battery charge and discharge assembly is in a discharging state.

[0014] Furthermore, it also includes a manual shift lever, a support shaft for resisting the manual shift lever is provided in the shell; the manual shift lever is a bent rod that rotates circumferentially around the support shaft, the first end of the manual shift lever and the output end of the drive motor are commonly fixedly connected to the end of the same rotating shaft, and the second end of the manual shift lever extends out of the shell to form a shifting end.

[0015] Furthermore, it also includes a check piece position detection device for detecting whether the check piece is normally opened or closed. The check piece position detection device is arranged on the control circuit board, and the signal input end of the check piece position detection device is electrically connected to the corresponding signal input end of the drive control circuit.

[0016] Furthermore, a rubber seal is provided on the outer edge of the anti-return plate.

[0017] Furthermore, the air pressure detection module is an air pressure sensor, and the control circuit board is connected to the air pressure sensor via a connecting line.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The anti-reverse plate of the anti-reverse damper of the utility model can be fully opened, and basically does not occupy the cross-sectional area of ​​the air duct, so that the air duct is unobstructed, the smoke exhaust effect is enhanced, and the fan power of the range hood is also reduced, making the fan operation more energy-efficient;

[0020] 2. The anti-reverse damper of the utility model determines whether the range hood is working by the air pressure value, and can operate independently of the range hood, without the need for manual switch operation, wiring or consideration of compatibility with the range hood;

[0021] 3. When the anti-return damper of the utility model is closed, the anti-return plate is driven by the motor to close. Compared with the anti-return plate closed by gravity and spring, the closing effect is tighter, which can prevent the possibility of oil smoke in the flue from seeping back into the range hood;

[0022] 4. The anti-reverse damper of the utility model is equipped with a power supply detection circuit and a backup battery assembly. When the anti-reverse damper is in the open state and a power outage occurs, the control circuit board will switch to the backup battery assembly for power supply and close the anti-reverse damper to prevent the oil smoke gas in the flue from entering the kitchen. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the principle of the utility model.

[0024] Figure 2 The structure of the utility model Figure 1 .

[0025] Figure 3 The structure of the utility model Figure 2 .

[0026] Figure 4 The structure of the utility model Figure 3 .

[0027] Figure 5a , 5bThey are respectively the position structure diagrams of the air pressure detection module of the present utility model.

[0028] Figure 6 It is a control flow chart of the utility model. DETAILED DESCRIPTION

[0029] The specific implementation of the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in combination with exemplary embodiments.

[0032] refer to Figures 1 to 6 The utility model is an electric anti-reverse damper capable of detecting air pressure, comprising an air duct assembly 1, two anti-reverse plates 2 symmetrically arranged in the air duct assembly, a driving device 3, a control circuit board 4 and a backup battery charging and discharging assembly 6; wherein:

[0033] The air duct assembly 1 comprises a panel 11 and an air duct 12 passing through a central hole of the panel, and the two ends of the air duct 12 are respectively provided with an air inlet for communicating with the exhaust pipe of the range hood and an air outlet for communicating with the flue;

[0034] The two anti-return plates 2 are rotatably installed in the air duct 12 through rotating shafts, so as to open or close the air duct 12 together;

[0035] The driving device 3 includes a housing, a driving motor for driving the anti-return plate to flip, and a transmission gear set for synchronously transmitting power to the anti-return plate; the housing is fixed to the outer wall of the air duct; the driving motor, the transmission gear set and the control circuit board are all installed in the housing; the transmission gear set includes a first transmission gear 31 and a second transmission gear 32, the output end of the driving motor is connected to the first transmission gear, the first transmission gear and the second transmission gear are respectively installed at the ends of the two rotating shafts, and the first transmission gear and the second transmission gear are meshed to achieve the synchronous flipping of the two anti-return plates;

[0036] The control circuit board 4 includes a drive control unit for controlling the operation of the drive motor, a charge and discharge unit for charging and discharging a backup battery charge and discharge assembly, and a power supply detection unit for detecting whether a power adapter is supplying power normally. The signal output end of the drive control unit is electrically connected to the signal input end of the drive motor.

[0037] In one embodiment, it also includes an air pressure detection module 5, wherein a data output end of the air pressure detection module is electrically connected to a data input end of the drive control unit, and the air pressure detection module is electrically connected to the control circuit board; the air pressure detection module is located in a housing between the control circuit board and the check valve air duct, and a ventilation hole is provided on the housing between the air pressure detection module and the air duct to ensure the transmission of air pressure.

[0038] In one embodiment, the backup battery charge and discharge component 6 is arranged in the shell, and the charge and discharge port of the backup battery charge and discharge component is electrically connected to the charge and discharge connection port of the drive control unit through the charge and discharge unit; when the drive control unit determines that the external power adapter is powered on, the backup battery charge and discharge component is in a charging state; when the drive control unit determines that the external power adapter is powered on, the backup battery charge and discharge component is in a discharging state.

[0039] In one embodiment, it also includes a manual shift lever 7, and a support shaft for resisting the manual shift lever is provided in the shell; the manual shift lever 7 is a bent rod that rotates circumferentially around the support shaft, the first end of the manual shift lever and the output end of the drive motor are commonly fixedly connected to the end of the same rotating shaft, and the second end of the manual shift lever extends out of the shell to form a shifting end.

[0040] In one embodiment, it also includes a check piece position detection device for detecting whether the check piece is normally opened or closed. The check piece position detection device is arranged on the control circuit board, and the signal input end of the check piece position detection device is electrically connected to the corresponding signal input end of the drive control circuit.

[0041] In one embodiment, a rubber seal is provided on the outer edge of the anti-return plate 2.

[0042] In one embodiment, the air pressure detection module 5 is an air pressure sensor, and the control circuit board is connected to the air pressure sensor via a connecting line.

[0043] Specifically, when the air pressure sensor detects that the air pressure is greater than a certain value, the control board determines that the range hood starts working, that is, the output signal opens the blade of the check valve. When the air pressure sensor detects that the air pressure is less than a certain value, the control board determines that the range hood stops working, that is, the output signal closes the blade of the check valve, achieving the effect of air non-return.

[0044] In the present invention, when the control circuit board 4 reads the value of the air pressure detection module 5 and determines that the value reaches the high wind pressure range, the drive motor is controlled to rotate and the anti-return plate 2 is rotated to a fully open angle, so that the oil smoke can be smoothly discharged into the flue. When the range hood stops working and the value in the flue drops to a low wind pressure range, the drive motor completely closes the anti-return plate 2, so that the air duct of the range hood is separated from the flue of the building, which plays a role of anti-return.

[0045] Under normal circumstances, the anti-reverse damper is powered by the adapter power supply. When the power adapter is powered off, the power supply of the anti-reverse damper is switched to the backup battery assembly 6 for power supply. If the anti-reverse damper is in an open state at this time, the control circuit board 4 will control the drive motor to close the anti-reverse damper. When the adapter power supply is restored, the backup battery will be in a charging state.

[0046] The electric anti-reverse damper of the utility model is provided with two power supply systems: one is powered by an external power adapter and serves as the normal power supply system of the electric anti-reverse damper; and the other is a backup power supply system. If the normal power supply system fails to supply power, the backup power supply system is started to supply power to the electric anti-reverse damper.

[0047] The control circuit board is equipped with a position detection device for the check piece, which can detect whether the check piece is opened and closed normally. The power supply detection circuit on the control circuit board can detect whether the power supply of the power adapter is normal. If the power supply of the power adapter is normal, the control circuit board can not only control the drive motor normally, but also charge the backup battery through the drive control circuit; if the power supply of the power adapter stops, the backup battery is enabled to supply power, and detect whether the check damper is closed. If it is not closed, the drive motor is controlled to close the check damper.

[0048] The backup battery charging and discharging assembly is an energy supply device that provides power to the anti-reverse damper after the power supply of the power adapter is disconnected, and includes energy storage devices such as batteries and capacitors.

[0049] In the description of the present invention, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An electric check damper capable of detecting air pressure, characterized in that: It includes an air duct assembly, two anti-return plates symmetrically arranged in the air duct assembly, a driving device, a control circuit board and a backup battery charging and discharging assembly; wherein: The air duct assembly includes a panel and an air duct passing through a central hole of the panel, and the two ends of the air duct are respectively provided with an air inlet for connecting with the exhaust pipe of the range hood and an air outlet for connecting with the flue; The two anti-return plates are rotatably installed in the air duct through rotating shafts respectively, so as to open or close the air duct together; The driving device comprises a housing, a driving motor for driving the anti-return plate to flip, and a transmission gear set for synchronously transmitting power to the anti-return plate; the housing is fixed to the outer wall of the air duct; the driving motor, the transmission gear set and the control circuit board are all installed in the housing; the transmission gear set comprises a first transmission gear and a second transmission gear, the output end of the driving motor is connected to the first transmission gear, the first transmission gear and the second transmission gear are respectively installed at the ends of the two rotating shafts, and the first transmission gear and the second transmission gear are meshed to realize the synchronous flipping of the two anti-return plates; The control circuit board includes a drive control unit for controlling the operation of the drive motor, a charge and discharge unit for charging and discharging the backup battery charge and discharge assembly, and a power supply detection unit for detecting whether the power adapter is supplying power normally, and the signal output end of the drive control unit is electrically connected to the signal input end of the drive motor; It also includes an air pressure detection module, the data output end of the air pressure detection module is electrically connected to the data input end of the drive control unit, and the air pressure detection module is electrically connected to the control circuit board; the air pressure detection module is located in a housing between the control circuit board and the check valve air duct, and a ventilation hole is provided on the housing between the air pressure detection module and the air duct to ensure the transmission of air pressure; The air pressure detection module is used to detect the air pressure in the air duct. When the air pressure sensor detects that the air pressure is greater than a certain value, the control board determines that the range hood starts working, that is, the output signal opens the blades of the check valve; when the air pressure sensor detects that the air pressure is less than a certain value, the control board determines that the range hood stops working, that is, the output signal closes the blades of the check valve, thereby achieving the effect of air non-return.

2. The electric check damper capable of detecting air pressure as claimed in claim 1, characterized in that: The backup battery charging and discharging assembly is arranged in the housing, and the charging and discharging port of the backup battery charging and discharging assembly is electrically connected to the charging and discharging connection port of the driving control unit through the charging and discharging unit; when the driving control unit determines that the external power adapter is powered on, the backup battery charging and discharging assembly is in a charging state; When the driving control unit determines that the power supply of the external power adapter is disconnected, the backup battery charging and discharging assembly is in a discharging state.

3. The electric check damper capable of detecting air pressure as claimed in claim 1, characterized in that: It also includes a manual shift lever, a support shaft for resisting the manual shift lever is provided in the shell; the manual shift lever is a bent rod that rotates circumferentially around the support shaft, the first end of the manual shift lever and the output end of the drive motor are fixedly connected to the end of the same rotating shaft, and the second end of the manual shift lever extends out of the shell to form a shifting end.

4. The electric check damper capable of detecting air pressure as claimed in claim 1, characterized in that: It also includes a check piece position detection device for detecting whether the check piece is normally opened or closed. The check piece position detection device is arranged on the control circuit board, and the signal input end of the check piece position detection device is electrically connected to the corresponding signal input end of the control circuit board.

5. The electric check damper capable of detecting air pressure as claimed in claim 1, characterized in that: The outer edge of the anti-return plate is sleeved with a rubber sealing piece.

6. The electric check damper capable of detecting air pressure as claimed in claim 1, characterized in that: The air pressure detection module is an air pressure sensor, and the control circuit board is connected to the air pressure sensor via a connecting line.

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