Flue check valve control circuit and method
By designing a circuit for flue check valve control, and using the power detection module and control module to control the relay, the problem of untimely closing of the traditional flue check valve controller is solved, the valve closing sensitivity and power monitoring accuracy are improved, and user health is protected.
Patent Information
- Application Number
- CN202510150860.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-05-13
AI Technical Summary
The traditional electric flue check valve controller closes the valve through the flue gas pressure, which has poor sensitivity, resulting in untimely closing the valve, causing indoor environment pollution and endangering user health.
A flue check valve control circuit is designed, including a current acquisition module, a voltage acquisition module, a power detection module, a control module and a relay. By detecting the power between the live wire and the neutral wire, the relay is controlled to improve the valve closing sensitivity.
It improves the timeliness and sensitivity of the flue check valve, prevents the return of smoke from flowing into the room, protects the health of users, and improves the accuracy of power monitoring.
Smart Images
Figure CN119987244A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of flue check valve control circuits, and in particular, to a flue check valve control circuit and method. Background Art
[0002] The flue check valve controller is a check valve controller based on the electrical detection technology of current and voltage monitoring. It has been widely used in flue check valves on the market due to its advantages of high detection sensitivity, high response speed, and wide detection power range. In the flue check valve, the flue check valve controller is one of the core components, and its performance is directly related to the power monitoring sensitivity, power monitoring signal-to-noise ratio, power monitoring lower limit and other important parameters of the flue check valve.
[0003] However, the traditional electric flue check valve controller uses the pressure generated by the flue gas in the pipeline to close the electric flue check valve, which has poor sensitivity. If the flue check valve is not closed in time, it is easy to cause indoor environmental pollution, thereby endangering the health of users.
[0004] Therefore, the inability to close the flue check valve in time is a problem that needs to be solved urgently. Summary of the invention
[0005] In view of this, an object of the present invention is to provide a flue check valve control circuit and method to solve the above-mentioned problems and improve the timeliness and sensitivity of the flue check valve closing.
[0006] In a first aspect, the present application provides a flue check valve control circuit, the circuit comprising: a current acquisition module, a voltage acquisition module, a power detection module, a control module and a relay; The first output end of the current acquisition module is connected to the first input end of the power detection module, the second output end of the current acquisition module is connected to the second input end of the power detection module, the first input end of the current acquisition module is connected to the zero line input end, and the second input end of the current acquisition module is connected to the zero line output end; The first output terminal of the voltage acquisition module is connected to the third input terminal of the power detection module, and the first input terminal of the voltage acquisition module is connected to the live wire; The first control signal output terminal of the power detection module is connected to the first input terminal of the control module; The first contact of the relay is connected to the neutral line output terminal, the second contact is connected to the live line, and the third contact is connected to the first end of the flue check valve control motor; The second end of the flue check valve control motor is connected to the zero line output end, and the third end is connected to the zero line input end; The control module is used to control the winding of the relay to lose power if the sampled power is less than the preset power threshold; wherein, when the winding of the relay loses power, the second contact of the relay is connected to the third contact of the relay, and when the second contact of the relay is connected to the third contact of the relay, the flue check valve control motor drives the flue check valve to close.
[0007] Preferably, the control module is also used to control the winding of the relay to be energized if the sampled power is greater than or equal to the preset power threshold; wherein, when the winding of the relay is energized, the first contact of the relay is connected to the second contact of the relay, and when the first contact of the relay is connected to the second contact of the relay, the flue check valve control motor drives the flue check valve to open.
[0008] Preferably, the circuit further comprises: a first switch element, a first resistor, a fourth resistor, a third resistor, a first diode, a second resistor and a first light emitting diode; The control end of the control module is connected to the first end of the first resistor and the first end of the fourth resistor, and the second end of the first resistor is connected to the control end of the first switch element and the first end of the third resistor respectively; The first end of the first switch element is respectively connected to the anode of the first diode, the first end of the second resistor and the first end of the winding of the relay; The cathode of the first diode is respectively connected to the anode of the first light emitting diode, the first power supply voltage and the second end of the winding of the relay, and the second end of the second resistor is connected to the cathode of the first light emitting diode; The second end of the first switch element and the second end of the third resistor are commonly connected to the zero line input end.
[0009] Preferably, the voltage acquisition module further includes: a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor and a fourth voltage-dividing resistor, a voltage sampling resistor and a first capacitor; The input end of the voltage acquisition module is connected to the output end of the voltage acquisition module through a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor and a fourth voltage-dividing resistor in sequence; The first end of the voltage sampling resistor, the first end of the first capacitor, and the first end of the fourth voltage-dividing resistor are commonly connected to the first output end of the voltage acquisition module; The second end of the voltage sampling resistor and the second end of the first capacitor are commonly connected to the zero line input end.
[0010] Preferably, the current acquisition module further includes: a current sampling resistor, a seventh voltage-dividing resistor, a first filter capacitor, an eighth voltage-dividing resistor and a second filter capacitor; The first end of the current sampling resistor and the first end of the seventh voltage-dividing resistor are commonly connected to the first input end of the current acquisition module, and the second end of the seventh voltage-dividing resistor and the first end of the first filter capacitor are commonly connected to the first output end of the current acquisition module; The second end of the current sampling resistor and the first end of the eighth voltage-dividing resistor are commonly connected to the second input end of the current acquisition module, and the second end of the eighth voltage-dividing resistor and the first end of the second filter capacitor are commonly connected to the second output end of the current acquisition module; The second end of the first filter capacitor and the second end of the second filter capacitor are commonly connected to the neutral line input end.
[0011] Preferably, the power detection module further includes: a bypass capacitor; the control module further includes: a pull-up resistor; The voltage input terminal of the power detection module is respectively connected to the second supply voltage and the first terminal of the bypass capacitor, and the second terminal of the bypass capacitor and the ground terminal of the power detection module are commonly connected to the neutral line input terminal; The second control signal output terminal of the power detection module is connected to the second input terminal of the control module; The third input terminal and the fourth input terminal of the control module are commonly connected to the second supply voltage; The fifth input terminal of the control module is connected to the second supply voltage through a pull-up resistor; The ground terminal of the control module is connected to the neutral line input terminal.
[0012] Preferably, the circuit further comprises: a rectifier module, a second capacitor, a fifth resistor, a third capacitor, a fourth capacitor, a second diode and a sixth resistor; The live wire is connected to the first input terminal of the rectifier module through a second capacitor, and the neutral wire input terminal is connected to the second input terminal of the rectifier module through a fuse; The first output end of the rectifier module is connected to the first end of the fifth resistor and the first end of the third capacitor, and the second end of the third capacitor and the second output end of the rectifier module are commonly connected to the zero line input end; The second end of the fifth resistor, the first end of the fourth capacitor and the cathode of the second diode are commonly connected to the first supply voltage; The second end of the fourth capacitor, the anode of the second diode and the second output end of the rectifier module are commonly connected to the neutral line input end; The first end of the second capacitor is connected to the live wire and the first end of the sixth resistor respectively, and the second end of the second capacitor is connected to the second end of the sixth resistor and the first input end of the rectifier module respectively.
[0013] Preferably, the circuit further comprises: a first current limiting resistor, a voltage reduction module, a fifth capacitor, a sixth capacitor, a seventh resistor and a second light emitting diode; A first end of the first current limiting resistor is connected to the first supply voltage, and a second end is connected to an input end of the step-down module; The output end of the step-down module, the first end of the fifth capacitor, the first end of the sixth capacitor, and the first end of the seventh resistor are commonly connected to the second supply voltage; The second end of the fifth capacitor, the ground end of the step-down module, the second end of the sixth capacitor, and the cathode of the second light-emitting diode are connected to the zero line input end; The anode of the second light emitting diode is connected to the second end of the seventh resistor.
[0014] Preferably, the first end of the first switch element is a collector, the second end of the first switch element is an emitter, and the control end of the first switch element is a base.
[0015] It can be seen from the above technical solution that the present application has at least the following beneficial effects: In the flue check valve control circuit provided by the present application, the power between the live wire and the neutral wire input terminal is detected by the power detection module, and the control module generates a low-level signal or a high-level signal according to the sampled power, and controls the first switch element according to the low-level signal or the high-level signal, and then controls the relay to control the opening and closing of the flue check valve. The circuit improves the accuracy of power monitoring and the sensitivity of the flue check valve closure, and avoids indoor air pollution caused by smoke reflux into the room due to the untimely closure of the flue check valve, which affects the health of users.
[0016] In a second aspect, the present application provides a flue check valve control method, which is applied to a flue check valve control circuit, wherein the flue check valve control circuit comprises: a current acquisition module, a voltage acquisition module, a power detection module, a control module and a relay; the first output end of the current acquisition module is connected to the first input end of the power detection module, the second output end of the current acquisition module is connected to the second input end of the power detection module, the first input end of the current acquisition module is connected to the zero line input end, and the second input end of the current acquisition module is connected to the zero line output end; the first output end of the voltage acquisition module is connected to the third input end of the power detection module, and the first input end of the voltage acquisition module is connected to the live wire; the first control signal output end of the power detection module is connected to the first input end of the control module; the first contact of the relay is connected to the zero line output end, the second contact is connected to the live wire, and the third contact is connected to the first end of the flue check valve control motor; the second end of the flue check valve control motor is connected to the zero line output end, and the third end is connected to the zero line input end; the method comprises: The control module obtains the sampled power sent by the power detection module; If the sampled power is less than the preset power threshold, the control module controls the winding of the relay to lose power; wherein, when the winding of the relay loses power, the second contact of the relay is connected to the third contact of the relay, and when the second contact of the relay is connected to the third contact of the relay, the flue check valve control motor drives the flue check valve to close.
[0017] The flue check valve control method provided in the present application has the same technical features as the above-mentioned flue check valve control circuit, so it can also solve the same technical problems and achieve the same technical effects.
[0018] It should be understood that the description of technical features, technical solutions, beneficial effects or similar language in this application does not imply that all features and advantages can be realized in any single embodiment. On the contrary, it is understood that the description of features or beneficial effects means that specific technical features, technical solutions or beneficial effects are included in at least one embodiment. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in the present embodiment can also be combined in any appropriate manner. Those skilled in the art will understand that the embodiment can be realized without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in a specific embodiment that does not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic diagram of a circuit flue check valve control circuit structure provided in an embodiment of the present application; Figure 2 A schematic diagram of another circuit flue check valve control circuit structure provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a rectifier circuit provided in an embodiment of the present application; Figure 4 A schematic diagram of the buck circuit structure provided in an embodiment of the present application. DETAILED DESCRIPTION
[0020] The terms "first", "second", "third", etc. in the specification of this application and the accompanying drawings are used to distinguish different objects rather than to limit a specific order.
[0021] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.
[0022] The embodiment of the present invention provides a flue check valve control circuit, such as Figure 1 As shown, Figure 1 A circuit diagram of a flue check valve control circuit structure provided in an embodiment of the present application. The circuit includes: a current acquisition module 100, a voltage acquisition module 300, a power detection module 200, a control module 400 and a relay K1; the first output end of the current acquisition module 100 is connected to the first input end of the power detection module 200, the second output end of the current acquisition module 100 is connected to the second input end of the power detection module 200, the first input end of the current acquisition module 100 is connected to the zero line input end N, and the second input end of the current acquisition module 100 is connected to the zero line output end NO; the first output end of the voltage acquisition module 300 is connected to the third input end of the power detection module 200, and the first input end of the voltage acquisition module 300 is connected to the live line L; the first control signal output end of the power detection module 200 is connected to the control signal output end. The first input end of the control module 400 is connected; the first contact of the relay K1 is connected to the neutral line output terminal NO, the second contact is connected to the live wire L, and the third contact is connected to the first end NC of the flue check valve control motor 700; the second end of the flue check valve control motor 700 is connected to the neutral line output terminal NO, and the third end is connected to the neutral line input terminal N; the control module 400 is used to control the winding of the relay K1 to lose power if the sampled power is less than the preset power threshold; wherein, in the case that the winding of the relay K1 loses power, the second contact of the relay K1 is connected to the third contact of the relay K1, and in the case that the second contact of the relay K1 is connected to the third contact of the relay K1, the flue check valve control motor 700 drives the flue check valve to close. Among them, the first end of the flue check valve control motor 700 is connected to the first end of the phase-shifting capacitor C9, the second end of the phase-shifting capacitor C9 is respectively connected to the second end of the flue check valve control motor 700 and the first end of the first inductor L1, the second end of the first inductor L1 and the first end of the second inductor L2 are commonly connected to the third end of the flue check valve control motor 700, and the second end of the second inductor L2 is connected to the first end of the flue check valve control motor 700.
[0023] Specifically, Figure 2 As shown, Figure 2Another schematic diagram of the structure of a flue check valve control circuit provided in an embodiment of the present application. The circuit also includes: a first switch element Q1, a first resistor R16, a fourth resistor R17, a third resistor R6, a first diode D1, a second resistor R2 and a first light-emitting diode LED1; the control end of the control module 400 is connected to the first end of the first resistor R16 and the first end of the fourth resistor R17, and the second end of the first resistor R16 is respectively connected to the control end of the first switch element Q1 and the first end of the third resistor R6; the first end of the first switch element Q1 is respectively connected to the anode of the first diode D1, the first end of the second resistor R2 and the first end of the winding of the relay K1; the cathode of the first diode D1 is respectively connected to the anode of the first light-emitting diode LED1, the first power supply voltage U1 and the second end of the winding of the relay K1, and the second end of the second resistor R2 is connected to the cathode of the first light-emitting diode LED1; the second end of the first switch element Q1 and the second end of the third resistor R6 are commonly connected to the zero line input end N.
[0024] More specifically, the power detection module 200 can detect the power between the live wire L and the neutral wire input terminal N of the circuit, that is, the sampling power. When the motor of the smoke exhaust system stops working, the current and voltage of the circuit are within the preset range, and then the power between the live wire L and the neutral wire input terminal N of the circuit is less than the preset power threshold. The sampling power enters the control module 400 through the first input terminal of the control module 400. After the control module 400 receives the sampling power, the control module 400 compares the sampling power with the preset power threshold. If the power (sampling power) between the live wire L and the neutral wire input terminal N is less than the preset power threshold, the control terminal of the control module 400 outputs a low level signal. The low-level signal controls the first switch element Q1 to be turned off. At this time, the winding of the relay K1 loses power, and the second contact of the relay K1 is connected to the third contact of the relay K1, that is, the live wire L is connected to the first end NC of the flue check valve control motor 700, and the rotating shaft of the flue check valve control motor 700 rotates counterclockwise, thereby driving the flue check valve to rotate counterclockwise, that is, the flue check valve is closed. Among them, the first resistor R16 and the fourth resistor R17 are used for voltage division, the third resistor R6 is a pull-down resistor, the first switch element Q1 is a first switch element, and the relay K1 is a relay.
[0025] The current acquisition module 100 and the voltage acquisition module 300 in the circuit are easy to design and manufacture. The control module 400 has dual data pointers and a high-speed core, a large operating voltage range, a large temperature detection range, and low power consumption. The relay K1 (relay) has high reliability, and the first diode D1 can suppress the back electromotive force of the relay K1 (relay). Compared with the prior art, in which the flue check valve is closed by the pressure generated by the flue gas, the circuit detects the power (sampling power) between the live wire L and the neutral line input terminal N through the power detection module 200, and the control module 400 generates a low-level signal or a high-level signal according to the sampling power, and controls the first switch element Q1 according to the low-level signal or the high-level signal, thereby controlling the relay K1 to control the flue check valve to close. The circuit adopts a high-performance sampling unit (current acquisition module 100 and voltage acquisition module 300), improves the accuracy of power monitoring, improves the sensitivity of the flue check valve closure, and avoids the indoor air pollution caused by the flue check valve not closing in time and the flue gas flowing back into the room, which affects the health of the user. The circuit can realize high-precision power monitoring, simplify the installation process, and provide effective safety protection in the event of a fire. The circuit is easy to install and does not require on-site calibration, which reduces the difficulty of operation for installers and improves installation efficiency. The integrated design reduces the impact of the external environment on the circuit, improves the stability of the flue check valve control circuit, and has strong fireproof performance. The added fire detection function module (temperature sensor) can respond quickly in the event of a fire and automatically close the flue check valve to effectively prevent the spread of fire. The control algorithm in the control module 400 in the circuit provides overload protection and short-circuit protection functions. When the circuit detects excessive current, the circuit automatically powers off.
[0026] In addition, the control module 400 verifies the stability and accuracy of the power detection module 200 under different environmental conditions and makes corrections by comparing the actual power of the smoke exhaust system with the power reading output by the serial port (not shown) of the control module 400, thereby ensuring the long-term operation reliability of the power detection module 200 and determining whether the power of the smoke exhaust system is abnormal, and then determining whether it needs to be repaired or cleaned. The circuit is also equipped with a temperature sensor to verify the response speed and effectiveness (whether it is a false alarm) of the fire alarm protection program in a simulated fire scene.
[0027] In one embodiment, Figure 2 As shown, Figure 2Another schematic diagram of the structure of a flue check valve control circuit provided in an embodiment of the present application. The control module 400 is further used to control the winding of the relay K1 to be energized if the sampled power is greater than or equal to a preset power threshold; wherein, when the winding of the relay K1 is energized, the first contact of the relay K1 is connected to the second contact of the relay K1, and when the first contact of the relay K1 is connected to the second contact of the relay K1, the flue check valve control motor 700 drives the flue check valve to open.
[0028] Specifically, the sampled power enters the control module 400 through the first input terminal of the control module 400. After receiving the sampled power, the control module 400 compares the sampled power with the preset power. If the power between the live wire L and the neutral wire input terminal N, that is, the sampled power is greater than or equal to the preset power threshold, it indicates that the smoke exhaust system needs to exhaust smoke, and the motor of the smoke exhaust system starts to start. At this time, the control terminal of the control module 400 outputs a high-level signal. The high-level signal controls the first switch element Q1 to turn on. At this time, the winding of the relay K1 is energized, and the first contact of the relay K1 is connected to the second contact of the relay K1, that is, the live wire L is connected to the neutral wire output terminal NO, and the rotating shaft of the flue check valve control motor 700 rotates clockwise, thereby driving the flue check valve to rotate clockwise, that is, the flue check valve is opened.
[0029] With such arrangement, the circuit improves the accuracy of power monitoring and the sensitivity of the flue check valve opening, thereby avoiding indoor air pollution caused by the flue check valve not opening in time and smoke not being discharged in time, thereby affecting the health of users.
[0030] The voltage acquisition module 300 is introduced below. Figure 2 As shown, Figure 2 Another schematic diagram of the structure of a flue check valve control circuit provided in an embodiment of the present application. The voltage acquisition module 300 also includes: a first voltage-dividing resistor R7, a second voltage-dividing resistor R10, a third voltage-dividing resistor R11, a fourth voltage-dividing resistor R8, a voltage sampling resistor R9, and a first capacitor C4; the input end of the voltage acquisition module 300 is connected to the output end of the voltage acquisition module 300 through the first voltage-dividing resistor R7, the second voltage-dividing resistor R10, the third voltage-dividing resistor R11, and the fourth voltage-dividing resistor R8 in sequence; the first end of the voltage sampling resistor R9, the first end of the first capacitor C4, and the first end of the fourth voltage-dividing resistor R8 are commonly connected to the first output end of the voltage acquisition module 300; the second end of the voltage sampling resistor R9 and the second end of the first capacitor C4 are commonly connected to the zero line input end N.
[0031] Specifically, the resistance values of the first voltage-dividing resistor R7, the second voltage-dividing resistor R10, the third voltage-dividing resistor R11 and the fourth voltage-dividing resistor R8 are all 470KΩ, which are used to divide the 220V AC voltage according to a preset ratio, that is, to reduce the 220V voltage to a sampling voltage according to a preset ratio. The resistance value of the voltage sampling resistor R9 is 1KΩ, and the voltage coefficient is 1.88.
[0032] The first voltage-dividing resistor R7, the second voltage-dividing resistor R10, the third voltage-dividing resistor R11 and the fourth voltage-dividing resistor R8 in the voltage acquisition module 300 can increase the creepage distance and reduce the 220V AC voltage according to a preset ratio to avoid excessive voltage from damaging the power detection module 200.
[0033] The current acquisition module 100 is introduced below. The current acquisition module 100 also includes: a current sampling resistor R3, a seventh voltage-dividing resistor R1, a first filter capacitor C2, an eighth voltage-dividing resistor R4, and a second filter capacitor C3; the first end of the current sampling resistor R3 and the first end of the seventh voltage-dividing resistor R1 are commonly connected to the first input end of the current acquisition module 100, and the second end of the seventh voltage-dividing resistor R1 and the first end of the first filter capacitor C2 are commonly connected to the first output end of the current acquisition module 300; the second end of the current sampling resistor R3 and the first end of the eighth voltage-dividing resistor R4 are commonly connected to the second input end of the current acquisition module 300, and the second end of the eighth voltage-dividing resistor R4 and the first end of the second filter capacitor C3 are commonly connected to the second output end of the current acquisition module 300; the second end of the first filter capacitor C2 and the second end of the second filter capacitor C3 are commonly connected to the zero line input end N.
[0034] Specifically, the resistance of the current sampling resistor R3 is 2mΩ, the current coefficient is 0.5, and the rated current carrying value is 10A. The seventh voltage-dividing resistor R1 and the first filter capacitor C2 form a first low-pass filter, and the eighth voltage-dividing resistor R4 and the second filter capacitor C3 form a second low-pass filter. Among them, the resistance of the seventh voltage-dividing resistor R1 and the eighth voltage-dividing resistor R4 is 1KΩ, and the capacitance of the first filter capacitor C2 and the second filter capacitor C3 is 33nF.
[0035] The current sampling resistor R3 in the current acquisition module 100 is a low-temperature resistor with a resistance of 2 mΩ, which can meet the requirements of high-precision power sampling and detection of the power detection module 200.
[0036] The power detection module 200 and the control module 400 are introduced below. Figure 2 As shown, Figure 2Another schematic diagram of the structure of a flue check valve control circuit provided in an embodiment of the present application. The power detection module 200 further includes: a bypass capacitor C1; the control module 400 further includes: a pull-up resistor R18; the voltage input terminal of the power detection module 400 is respectively connected to the second power supply voltage U2 and the first end of the bypass capacitor C1, and the second end of the bypass capacitor C1 and the grounding terminal of the power detection module 200 are commonly connected to the zero line input terminal N; the second control signal output terminal of the power detection module 200 is connected to the second input terminal of the control module 400; the third input terminal and the fourth input terminal of the control module 400 are commonly connected to the second power supply voltage U2; the fifth input terminal of the control module 400 is connected to the second power supply voltage U2 through the pull-up resistor R18; the grounding terminal of the control module 400 is connected to the zero line input terminal N.
[0037] Specifically, after the first input terminal and the second input terminal of the power detection module 200 obtain the differential voltage between the first output terminal and the second output terminal of the current acquisition module 100 (the voltage after the seventh voltage-dividing resistor R1 and the eighth voltage-dividing resistor R4 divide the voltage between the zero line input terminal N and the zero line output terminal NO), the sampling current is obtained according to the ratio of the seventh voltage-dividing resistor R1 and the eighth voltage-dividing resistor R4. The voltage input terminal of the power detection module 200 obtains the sampling voltage, that is, the voltage after the voltage of the live line L is divided by the first voltage-dividing resistor R7, the second voltage-dividing resistor R10, the third voltage-dividing resistor R11 and the fourth voltage-dividing resistor R8. The power detection module 200 obtains the sampling power according to the sampling current and the sampling voltage, and converts the sampling power into a high-level signal or a low-level signal. The control module 400 obtains the high-level signal or the low-level signal generated by the power detection module 200, and controls the conduction or cutoff of the first switching element Q1 according to the high-level signal or the low-level signal.
[0038] The control module 400 can generate a high level signal or a low level signal according to the sampled power obtained from the power detection module 200, and can realize high-precision power monitoring. In addition, the control module 400 and the power detection module 200 do not need to be calibrated on site, and workers only need to make simple connections according to the instructions, which simplifies the installation steps.
[0039] In one embodiment, if Figure 3 As shown, Figure 3Schematic diagram of the rectifier circuit structure provided in the embodiment of the present application. The circuit also includes: a rectifier module 500, a second capacitor C5, a fifth resistor R13, a third capacitor CE1, a fourth capacitor C6, a second diode DZ1 and a sixth resistor R12; the live wire L is connected to the first input terminal of the rectifier module 500 through the second capacitor C5, and the neutral line input terminal N is connected to the second input terminal of the rectifier module 500 through the fuse F1; the first output terminal of the rectifier module 500 is connected to the first end of the fifth resistor R13 and the first end of the third capacitor CE1, and the second end of the third capacitor CE1 is connected to the second input terminal of the rectifier module 500. The output end is commonly connected to the neutral line input terminal N; the second end of the fifth resistor R13, the first end of the fourth capacitor C6 and the cathode of the second diode DZ1 are commonly connected to the first supply voltage U1; the second end of the fourth capacitor C6, the anode of the second diode DZ1 and the second output end of the rectifier module 500 are commonly connected to the neutral line input terminal N; the first end of the second capacitor C5 is respectively connected to the live wire L and the first end of the sixth resistor R12, and the second end of the second capacitor C5 is respectively connected to the second end of the sixth resistor R12 and the first input end of the rectifier module 500.
[0040] Specifically, since the relay K1 requires a 24V DC voltage (first power supply voltage U1) for power supply, the rectifier module 500 is required to convert the 220V AC power into a 24V DC voltage, that is, the first power supply voltage U1. Among them, the sixth resistor R12 is selected as a step-down resistor to step down the 220V AC power. The resistance of the sixth resistor R12 is 270KΩ and the rated power is 2W. The second capacitor C5 is selected as a step-down capacitor. The capacitance of the second capacitor C5 is 1uF and the rated voltage is 400V. The loss angle of the second capacitor C5 is small and the withstand voltage is high. The third capacitor CE1 is selected as a filter capacitor (electrolytic capacitor). The capacitance of the third capacitor CE1 is 220uF and the rated voltage is 50V. The second diode DZ1 is a Schottky diode with a dissipation power greater than 1.1W and a reverse breakdown voltage of 24V, which is used as a voltage regulator diode in this circuit.
[0041] The above-mentioned rectifier module 500 can realize efficient conversion of AC power to DC power, has high power utilization rate, has excellent stability, can maintain stable performance in various harsh environments, and provide stable and reliable power supply support for relay K1 (relay).
[0042] In one embodiment, if Figure 4 As shown, Figure 4A schematic diagram of the buck circuit structure provided in an embodiment of the present application. The circuit also includes: a first current limiting resistor R14, a buck module 600, a fifth capacitor C7, a sixth capacitor C8, a seventh resistor R5, and a second light-emitting diode LED2; the first end of the first current limiting resistor R14 is connected to the first power supply voltage U1, and the second end is connected to the input end of the buck module 600; the output end of the buck module 600 and the first end of the fifth capacitor C7, the first end of the sixth capacitor C8, and the first end of the seventh resistor R5 are commonly connected to the second power supply voltage U2; the second end of the fifth capacitor C7 and the ground end of the buck module 600, the second end of the sixth capacitor C8, and the cathode of the second light-emitting diode LED2 are commonly connected to the zero line input end N; the anode of the second light-emitting diode LED2 is connected to the second end of the seventh resistor R5.
[0043] Specifically, since the power detection module 200 and the control module 400 require a 5V DC voltage (the second power supply voltage U2) for power supply, the step-down module 600 is required to convert the 24V DC voltage into a 5V DC voltage, ie, the second power supply voltage U2.
[0044] The step-down module 600 can output a stable 5V voltage (first power supply voltage U1), which is not affected by the fluctuation of the 24V input voltage (second power supply voltage U2), and provides stable and reliable power supply support for the power detection module 200 and the control module 400, thereby improving energy utilization.
[0045] On the basis of the above method embodiment, the embodiment of the present invention further provides a flue check valve control method, which is applied to a flue check valve control circuit, wherein the flue check valve control circuit comprises: a current acquisition module, a voltage acquisition module, a power detection module, a control module and a relay; the first output end of the current acquisition module is connected to the first input end of the power detection module, the second output end of the current acquisition module is connected to the second input end of the power detection module, the first input end of the current acquisition module is connected to the zero line input end, and the second input end of the current acquisition module is connected to the zero line output end; the first output end of the voltage acquisition module is connected to the third input end of the power detection module, and the first input end of the voltage acquisition module is connected to the live wire; the first control signal output end of the power detection module is connected to the first input end of the control module; the first contact of the relay is connected to the zero line output end, the second contact is connected to the live wire, and the third contact is connected to the first end of the flue check valve control motor; the second end of the flue check valve control motor is connected to the zero line output end, and the third end is connected to the zero line input end; the method comprises: The control module obtains the sampled power sent by the power detection module; If the sampled power is less than the preset power threshold, the control module controls the winding of the relay to lose power; wherein, when the winding of the relay loses power, the second contact of the relay is connected to the third contact of the relay, and when the second contact of the relay is connected to the third contact of the relay, the flue check valve control motor drives the flue check valve to close.
[0046] The flue check valve control method provided in the embodiment of the present invention has the same technical features as the flue check valve control circuit provided in the above embodiment, and can therefore solve the same technical problems and achieve the same technical effects.
[0047] The descriptions of the structures corresponding to the above-mentioned figures have different emphases. For parts not described in detail in a certain structure, reference can be made to the relevant descriptions of other structures.
[0048] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application.
Claims
1. A flue check valve control circuit, characterized in that: The circuit comprises: a current acquisition module, a voltage acquisition module, a power detection module, a control module and a relay; The first output end of the current acquisition module is connected to the first input end of the power detection module, the second output end of the current acquisition module is connected to the second input end of the power detection module, the first input end of the current acquisition module is connected to the zero line input end, and the second input end of the current acquisition module is connected to the zero line output end; The first output terminal of the voltage acquisition module is connected to the third input terminal of the power detection module, and the first input terminal of the voltage acquisition module is connected to the live wire; The first control signal output terminal of the power detection module is connected to the first input terminal of the control module; The first contact of the relay is connected to the neutral line output terminal, the second contact is connected to the live line, and the third contact is connected to the first end of the flue check valve control motor; The second end of the flue check valve control motor is connected to the zero line output end, and the third end is connected to the zero line input end; The control module is used to control the winding of the relay to lose power if the sampled power is less than the preset power threshold; wherein, when the winding of the relay loses power, the second contact of the relay is connected to the third contact of the relay, and when the second contact of the relay is connected to the third contact of the relay, the flue check valve control motor drives the flue check valve to close.
2. The flue check valve control circuit according to claim 1, characterized in that: The control module is also used to control the winding of the relay to be energized if the sampled power is greater than or equal to the preset power threshold; wherein, when the winding of the relay is energized, the first contact of the relay is connected to the second contact of the relay, and when the first contact of the relay is connected to the second contact of the relay, the flue check valve control motor drives the flue check valve to open.
3. The flue check valve control circuit according to claim 1, characterized in that: The circuit further comprises: a first switch element, a first resistor, a fourth resistor, a third resistor, a first diode, a second resistor and a first light emitting diode; The control end of the control module is connected to the first end of the first resistor and the first end of the fourth resistor, and the second end of the first resistor is connected to the control end of the first switch element and the first end of the third resistor respectively; The first end of the first switch element is respectively connected to the anode of the first diode, the first end of the second resistor and the first end of the winding of the relay; The cathode of the first diode is respectively connected to the anode of the first light emitting diode, the first power supply voltage and the second end of the winding of the relay, and the second end of the second resistor is connected to the cathode of the first light emitting diode; The second end of the first switch element and the second end of the third resistor are commonly connected to the zero line input end.
4. The flue check valve control circuit according to claim 1, characterized in that: The voltage acquisition module further includes: a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor and a fourth voltage-dividing resistor, a voltage sampling resistor and a first capacitor; The input end of the voltage acquisition module is connected to the output end of the voltage acquisition module through a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor and a fourth voltage-dividing resistor in sequence; The first end of the voltage sampling resistor, the first end of the first capacitor, and the first end of the fourth voltage-dividing resistor are commonly connected to the first output end of the voltage acquisition module; The second end of the voltage sampling resistor and the second end of the first capacitor are commonly connected to the zero line input end.
5. The flue check valve control circuit according to claim 1, characterized in that: The current acquisition module further includes: a current sampling resistor, a seventh voltage-dividing resistor, a first filter capacitor, an eighth voltage-dividing resistor, and a second filter capacitor; The first end of the current sampling resistor and the first end of the seventh voltage-dividing resistor are commonly connected to the first input end of the current acquisition module, and the second end of the seventh voltage-dividing resistor and the first end of the first filter capacitor are commonly connected to the first output end of the current acquisition module; The second end of the current sampling resistor and the first end of the eighth voltage-dividing resistor are commonly connected to the second input end of the current acquisition module, and the second end of the eighth voltage-dividing resistor and the first end of the second filter capacitor are commonly connected to the second output end of the current acquisition module; The second end of the first filter capacitor and the second end of the second filter capacitor are commonly connected to the neutral line input end.
6. The flue check valve control circuit according to claim 1, characterized in that: The power detection module further includes: a bypass capacitor; the control module further includes: a pull-up resistor; The voltage input terminal of the power detection module is respectively connected to the second supply voltage and the first terminal of the bypass capacitor, and the second terminal of the bypass capacitor and the ground terminal of the power detection module are commonly connected to the neutral line input terminal; The second control signal output terminal of the power detection module is connected to the second input terminal of the control module; The third input terminal and the fourth input terminal of the control module are commonly connected to the second supply voltage; The fifth input terminal of the control module is connected to the second supply voltage through a pull-up resistor; The ground terminal of the control module is connected to the neutral line input terminal.
7. The flue check valve control circuit according to claim 1, characterized in that: The circuit further includes: a rectifier module, a second capacitor, a fifth resistor, a third capacitor, a fourth capacitor, a second diode and a sixth resistor; The live wire is connected to the first input terminal of the rectifier module through a second capacitor, and the neutral wire input terminal is connected to the second input terminal of the rectifier module through a fuse; The first output end of the rectifier module is connected to the first end of the fifth resistor and the first end of the third capacitor, and the second end of the third capacitor and the second output end of the rectifier module are commonly connected to the zero line input end; The second end of the fifth resistor, the first end of the fourth capacitor and the cathode of the second diode are commonly connected to the first supply voltage; The second end of the fourth capacitor, the anode of the second diode and the second output end of the rectifier module are commonly connected to the neutral line input end; The first end of the second capacitor is respectively connected to the live wire and the first end of the sixth resistor, and the second end of the second capacitor is respectively connected to the second end of the sixth resistor and the first input end of the rectifier module.
8. The flue check valve control circuit according to claim 1, characterized in that: The circuit further includes: a first current limiting resistor, a voltage reduction module, a fifth capacitor, a sixth capacitor, a seventh resistor and a second light emitting diode; A first end of the first current limiting resistor is connected to the first supply voltage, and a second end is connected to an input end of the step-down module; The output end of the step-down module, the first end of the fifth capacitor, the first end of the sixth capacitor, and the first end of the seventh resistor are commonly connected to the second supply voltage; The second end of the fifth capacitor, the ground end of the step-down module, the second end of the sixth capacitor, and the cathode of the second light-emitting diode are connected to the zero line input end; The anode of the second light emitting diode is connected to the second end of the seventh resistor.
9. The flue check valve control circuit according to claim 1, characterized in that: The first end of the first switch element is a collector, the second end of the first switch element is an emitter, and the control end of the first switch element is a base.
10. A flue check valve control method, characterized in that: The invention is applied to a flue check valve control circuit, and the flue check valve control circuit comprises: a current acquisition module, a voltage acquisition module, a power detection module, a control module and a relay; the first output end of the current acquisition module is connected to the first input end of the power detection module, the second output end of the current acquisition module is connected to the second input end of the power detection module, the first input end of the current acquisition module is connected to the zero line input end, and the second input end of the current acquisition module is connected to the zero line output end; the first output end of the voltage acquisition module is connected to the third input end of the power detection module, and the first input end of the voltage acquisition module is connected to the live line; the first control signal output end of the power detection module is connected to the first input end of the control module; the first contact of the relay is connected to the zero line output end, the second contact is connected to the live line, and the third contact is connected to the first end of the flue check valve control motor; the second end of the flue check valve control motor is connected to the zero line output end, and the third end is connected to the zero line input end; the method comprises: The control module obtains the sampled power sent by the power detection module; If the sampled power is less than the preset power threshold, the control module controls the winding of the relay to lose power; wherein, when the winding of the relay loses power, the second contact of the relay is connected to the third contact of the relay, and when the second contact of the relay is connected to the third contact of the relay, the flue check valve control motor drives the flue check valve to close.