A fireproof door electric door closer electromagnet detection circuit

Abstract

The utility model discloses a fireproof door electric door closer electromagnet detection circuit, including power supply circuit, relay control circuit, singlechip, capacitor circuit, bridge circuit for controlling current diversion and detection feedback circuit, one output of power supply circuit is through relay control circuit with the input of capacitor circuit electricity is connected, another output of power supply circuit with the power supply end electricity of singlechip is connected, the output of capacitor circuit with the input of bridge circuit electricity is connected, through MCU to the bridge -type circuit of two -way MOS pipe composition, realizes the control to electromagnet current direction, to realize the test of control electromagnet, and avoided the problem that the detection was not accurate through mechanical structure control test. The fireproof door electric door closer electromagnet detection circuit provided by the utility model has the effect that the current diversion is automatically controlled, and the electromagnet is tested efficiently.

Description

Technical Field

[0001] This utility model relates to the field of electric door closer technology, and in particular to an electromagnet detection circuit for an electric door closer for fireproof doors. Background Technology

[0002] The electric door closer for fireproof doors is the terminal actuator of a fire alarm linkage control system. The electromagnet is a valve control device in the electric door closer that automatically opens and closes the door. This device directly determines whether the door closer can automatically close, making the quality testing of the electromagnet valve particularly important. A current electromagnet valve testing device consists of a toggle switch, an electrolytic capacitor, two tactile switches, a 24V power supply, a power input connector, and a electromagnet valve connection socket. The working principle of the entire testing device is as follows: The worker turns the toggle switch to 24V, connects the capacitor to the 24V power supply to charge the capacitor, and then disconnects the 24V power supply and the capacitor by turning the toggle switch back. Pressing the "Release" button once connects the positive and negative terminals of the capacitor to the two input lines of the solenoid valve, causing the capacitor to discharge through the solenoid valve, thus triggering the "Release" action of the solenoid valve. Then, the "Release" button is released, and turning the toggle switch again connects the 24V power supply to the two terminals of the capacitor to charge the capacitor. After the capacitor is fully charged, the toggle switch is turned off again to disconnect the 24V power supply from the capacitor. Then, pressing the "Attract" button connects the positive and negative terminals of the power supply to the two terminals of the electromagnet (this connection of the capacitor's positive and negative terminals is reversed compared to when the "Release" button was pressed), causing the electromagnet to attract. The two "Release" and "Attract" actions of the electromagnet are used as the standard to judge whether the electromagnet is qualified. During this process, the toggle switch is a mechanical contact device. In use, poor contact between the toggle switch contacts can easily occur. This can prevent the capacitor from being fully charged, thus failing to drive the electromagnet to "release" and "attract" accurately, making it impossible to determine whether the electromagnet is good or bad. Utility Model Content

[0003] To address the aforementioned issues, a detection circuit for the electromagnet of an electric door closer for fire doors is provided, aiming to resolve the problems existing in the prior art.

[0004] The specific technical solution is as follows:

[0005] An electromagnet detection circuit for an electric door closer in a fireproof door includes a power supply circuit, a relay control circuit, a microcontroller, a capacitor circuit, a bridge circuit for controlling current direction, and a detection feedback circuit. One output terminal of the power supply circuit is electrically connected to the input terminal of the capacitor circuit through the relay control circuit. The other output terminal of the power supply circuit is electrically connected to the power supply terminal of the microcontroller. The output terminal of the capacitor circuit is electrically connected to the input terminal of the bridge circuit. The control terminal of the bridge circuit is electrically connected to the control signal output terminal of the microcontroller. The output terminal of the bridge circuit is electrically connected to an external solenoid valve interface. The detection feedback circuit collects the detection signal and transmits it to the microcontroller. The microcontroller outputs a corresponding feedback signal based on the detection signal, which is then output externally via the detection feedback circuit.

[0006] The aforementioned electromagnetic detection circuit for the electric door closer of a fire door also has the following features: the power supply circuit includes a 24V power supply and a DC-DC circuit; one output terminal of the 24V power supply is electrically connected to the output terminal of the capacitor circuit through the relay control circuit; and the other output terminal of the 24V power supply supplies power to the microcontroller through the DC-DC circuit.

[0007] The aforementioned electromagnetic detection circuit for the electric door closer of a fire door also has the following characteristics: the relay control circuit includes a relay JQ1, a diode D2, a resistor R30, a transistor Q1, a resistor R1, and a capacitor C1. The normally open input terminal of the relay JQ1 is electrically connected to the 24V power supply. The normally open output terminal of the relay JQ1 is grounded after passing through the resistor R1 and the capacitor C1 in sequence. The common terminal of the resistor R1 and the capacitor C1 serves as the output terminal VCC and is electrically connected to the capacitor circuit. One end of the coil of the relay JQ1 is electrically connected to the external 5V power supply. The other end of the coil of the relay JQ1 is electrically connected to the anode of the diode D2. The cathode of the diode D2 is electrically connected to one end of the coil of the relay JQ1. The other end of the coil of the relay JQ1 is electrically connected to the collector of the transistor Q1. The base of the transistor Q1 is electrically connected to the microcontroller through the resistor R30. The emitter of the transistor Q1 is grounded.

[0008] The aforementioned electromagnetic detection circuit for the electric door closer of a fire door also has the following feature: the bridge circuit includes an electromagnet driving circuit and a MOS transistor driving circuit. The MOS transistor driving circuit receives the control signal output by the microcontroller and then outputs a control signal to the electromagnet driving circuit to control the electromagnet driving circuit to conduct in the forward or reverse direction.

[0009] The aforementioned electromagnetic detection circuit for the electric door closer of a fire door also has the following features: the MOS transistor driving circuit includes a forward driving module and a reverse driving module. The forward driving module includes a resistor R11, an optocoupler U4, and a resistor R9. The anode of the optocoupler U4 is electrically connected to an external 3.3V power supply through the resistor R11, the cathode of the optocoupler U4 is electrically connected to the microcontroller, the collector of the optocoupler U4 is electrically connected to the VCC power supply, the emitter of the optocoupler U4 is grounded through the resistor R9, and the emitter of the optocoupler U4 also serves as a control output terminal electrically connected to the forward conduction control terminal of the electromagnetic driving circuit.

[0010] The reverse drive module includes a resistor R10, an optocoupler U3, and a resistor R8. The anode of the optocoupler U3 is electrically connected to an external 3.3V power supply through the resistor R10. The cathode of the optocoupler U3 is electrically connected to the microcontroller. The collector of the optocoupler U3 is electrically connected to the VCC power supply. The emitter of the optocoupler U3 is grounded through the resistor R8. The emitter of the optocoupler U3 also serves as a control output terminal and is electrically connected to the reverse conduction control terminal of the electromagnet drive circuit.

[0011] The aforementioned electromagnetic detection circuit for the electric door closer of a fire door also has the following features: the electromagnetic drive circuit includes a resistor R6, a transistor Q2, a resistor R2, a MOSFET Q8, a MOSFET Q9, a resistor R3, a transistor Q3, a resistor R7, a MOSFET Q6, a MOSFET Q7, and a solenoid valve connector J2. One end of the resistor R6 is electrically connected to the control output terminal of the forward drive module, and the other end of the resistor R6 is electrically connected to the base of the transistor Q2. The emitter of the transistor Q2 is grounded. The collector of the transistor Q2 is electrically connected to the source of the MOSFET Q8 through the resistor R2. The gate of the MOSFET Q8 is electrically connected to the collector of the transistor Q2. The drain of the MOSFET Q8 is electrically connected to the drain of the MOSFET Q6. The source of the MOSFET Q6 is grounded. The gate of the MOSFET Q6 is electrically connected to the control output terminal of the reverse drive module. The source of the MOSFET Q8 is also electrically connected to the VCC power supply.

[0012] The base of transistor Q3 is electrically connected to the control output terminal of the reverse drive module through resistor R7. The emitter of transistor Q3 is grounded. The collector of transistor Q3 is electrically connected to the source of MOSFET Q9 through resistor R3. The source of MOSFET Q9 is electrically connected to the source of MOSFET Q8. The drain of MOSFET Q9 is electrically connected to the drain of MOSFET Q7. The source of MOSFET Q7 is electrically connected to the source of MOSFET Q6. The drain of MOSFET Q7 is electrically connected to one input terminal of solenoid valve connector J2. The drain of MOSFET Q6 is electrically connected to the other input terminal of solenoid valve connector J2. The output terminal of solenoid valve connector J2 is electrically connected to the electromagnet under test.

[0013] The aforementioned electromagnetic detection circuit for the electric door closer of a fire door also includes a capacitor voltage detection circuit. This capacitor voltage detection circuit includes resistors R26 and R28, and capacitor C29. One end of resistor R26 is electrically connected to the power supply VCC, and the other end of resistor R26 is grounded through resistor R28. The common terminal of resistors R26 and R28 is grounded through capacitor C29. The common terminal of resistors R26 and R28 is also used as an output terminal and electrically connected to the microcontroller.

[0014] In summary, the beneficial effects of this scheme are:

[0015] The electromagnet detection circuit for electric fire door closers provided by this utility model uses an MCU to control the direction of the electromagnet current through a bridge circuit composed of two MOSFETs, thereby controlling the electromagnet testing and avoiding the inaccurate testing caused by mechanical structure control. The electromagnet detection circuit for electric fire door closers provided by this utility model has the effect of automatically controlling the current direction and efficiently testing the electromagnet. Attached Figure Description

[0016] Figure 1 This is a system block diagram of the electromagnet detection circuit for the electric door closer of the fire door according to this utility model.

[0017] Figure 2 This is a schematic diagram of the relay control circuit of the electromagnet detection circuit of the fire door electric door closer of this utility model.

[0018] Figure 3 This is a schematic diagram of the MOS transistor drive circuit of the electromagnet detection circuit for the electric door closer of the fire door according to this utility model.

[0019] Figure 4 This is a schematic diagram of the electromagnet drive circuit of the electromagnet detection circuit of the electric door closer for fire doors of this utility model.

[0020] Figure 5 This is a schematic diagram of the capacitor voltage detection circuit of the electromagnet detection circuit for the electric door closer of the present invention. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0023] The present invention will be further described below with reference to specific embodiments, but this is not intended to limit the present invention.

[0024] Figure 1 This is a system block diagram of the electromagnet detection circuit for the electric door closer of the fire door according to this utility model. Figure 2 This is a schematic diagram of the relay control circuit of the electromagnet detection circuit for the electric door closer of the fire door according to this utility model. Figure 3 This is a schematic diagram of the MOS transistor drive circuit of the electromagnet detection circuit for the electric door closer of this utility model. Figure 4 This is a schematic diagram of the electromagnet drive circuit of the electromagnet detection circuit for the electric door closer of this utility model. Figure 5 This is a schematic diagram of the capacitor voltage detection circuit of the electromagnet detection circuit for the electric door closer of this utility model. Figures 1-5 As shown, the electromagnet detection circuit for the electric door closer provided in this embodiment includes a power supply circuit, a relay control circuit, a microcontroller, a capacitor circuit, a bridge circuit for controlling current direction, and a detection feedback circuit. One output terminal of the power supply circuit is electrically connected to the input terminal of the capacitor circuit through the relay control circuit, and the other output terminal of the power supply circuit is electrically connected to the power supply terminal of the microcontroller. The output terminal of the capacitor circuit is electrically connected to the input terminal of the bridge circuit. The control terminal of the bridge circuit is electrically connected to the control signal output terminal of the microcontroller. The output terminal of the bridge circuit is electrically connected to the external solenoid valve interface. After the detection feedback circuit collects the detection signal, it transmits it to the microcontroller. The microcontroller outputs the corresponding feedback signal according to the detection signal and outputs it externally through the detection feedback circuit.

[0025] In the above embodiment, the power supply circuit includes a 24V power supply and a DC-DC circuit. One output terminal of the 24V power supply is electrically connected to the output terminal of the capacitor circuit through a relay control circuit, and the other output terminal of the 24V power supply supplies power to the microcontroller through the DC-DC circuit.

[0026] In the above embodiment, the relay control circuit includes a relay JQ1, a diode D2, a resistor R30, a transistor Q1, a resistor R1, and a capacitor C1. The normally open input terminal of the relay JQ1 is electrically connected to a 24V power supply. The normally open output terminal of the relay JQ1 is grounded after passing through a resistor R1 and a capacitor C1 in sequence. The common terminal of the resistor R1 and the capacitor C1 serves as the output terminal VCC and is electrically connected to the capacitor circuit. One end of the coil of the relay JQ1 is electrically connected to an external 5V power supply. The other end of the coil of the relay JQ1 is electrically connected to the anode of the diode D2. The cathode of the diode D2 is electrically connected to one end of the coil of the relay JQ1. The other end of the coil of the relay JQ1 is electrically connected to the collector of the transistor Q1. The base of the transistor Q1 is electrically connected to the microcontroller through a resistor R30. The emitter of the transistor Q1 is grounded.

[0027] In the above embodiments, the bridge circuit includes an electromagnet driving circuit and a MOSFET driving circuit. The MOSFET driving circuit receives the control signal output by the microcontroller and then outputs a control signal to the electromagnet driving circuit to control the electromagnet driving circuit to conduct in the forward or reverse direction.

[0028] In the above embodiments, the MOS transistor driving circuit includes a forward driving module and a reverse driving module. The forward driving module includes a resistor R11, an optocoupler U4, and a resistor R9. The anode of the optocoupler U4 is electrically connected to an external 3.3V power supply through the resistor R11, the cathode of the optocoupler U4 is electrically connected to a microcontroller, the collector of the optocoupler U4 is electrically connected to the VCC power supply, the emitter of the optocoupler U4 is grounded through the resistor R9, and the emitter of the optocoupler U4 also serves as a control output terminal and is electrically connected to the forward conduction control terminal of the electromagnet driving circuit.

[0029] The reverse drive module includes resistor R10, optocoupler U3, and resistor R8. The anode of optocoupler U3 is electrically connected to an external 3.3V power supply through resistor R10, the cathode of optocoupler U3 is electrically connected to a microcontroller, the collector of optocoupler U3 is electrically connected to the VCC power supply, and the emitter of optocoupler U3 is grounded through resistor R8. The emitter of optocoupler U3 also serves as a control output terminal and is electrically connected to the reverse conduction control terminal of the electromagnet drive circuit.

[0030] In the above embodiment, the electromagnet drive circuit includes resistor R6, transistor Q2, resistor R2, MOSFET Q8, MOSFET Q9, resistor R3, transistor Q3, resistor R7, MOSFET Q6, MOSFET Q7, and solenoid valve connector J2. One end of resistor R6 is electrically connected to the control output terminal of the forward drive module, and the other end of resistor R6 is electrically connected to the base of transistor Q2. The emitter of transistor Q2 is grounded. The collector of transistor Q2 is electrically connected to the source of MOSFET Q8 through resistor R2. The gate of MOSFET Q8 is electrically connected to the collector of transistor Q2. The drain of MOSFET Q8 is electrically connected to the drain of MOSFET Q6. The source of MOSFET Q6 is grounded. The gate of MOSFET Q6 is electrically connected to the control output terminal of the reverse drive module. The source of MOSFET Q8 is also electrically connected to the VCC power supply.

[0031] The base of transistor Q3 is electrically connected to the control output of the reverse drive module through resistor R7. The emitter of transistor Q3 is grounded. The collector of transistor Q3 is electrically connected to the source of MOSFET Q9 through resistor R3. The source of MOSFET Q9 is electrically connected to the source of MOSFET Q8. The drain of MOSFET Q9 is electrically connected to the drain of MOSFET Q7. The source of MOSFET Q7 is electrically connected to the source of MOSFET Q6. The drain of MOSFET Q7 is electrically connected to one input terminal of solenoid valve connector J2. The drain of MOSFET Q6 is electrically connected to the other input terminal of solenoid valve connector J2. The output terminal of solenoid valve connector J2 is electrically connected to the electromagnet under test.

[0032] In the above embodiment, a capacitor voltage detection circuit is also included. The capacitor voltage detection circuit includes resistor R26, resistor R28 and capacitor C29. One end of resistor R26 is electrically connected to the power supply VCC, and the other end of resistor R26 is grounded through resistor R28. The common terminal of resistor R26 and resistor R28 is grounded through capacitor C29. The common terminal of resistor R26 and resistor R28 is also used as an output terminal and electrically connected to the microcontroller.

[0033] It should be noted that the circuit also includes an LED circuit, a button trigger circuit, and a buzzer circuit. The LED circuit and the buzzer circuit are used to provide feedback alarm information, while the button trigger circuit is used to start the detection. Each solenoid valve only needs to be tested once by pressing the button trigger circuit.

[0034] In operation, a relay and a wire-wound resistor are used to charge the capacitor instead of a toggle switch. The input voltage and capacitor voltage are detected by the ADC of the microcontroller to determine whether the input voltage and capacitor charging voltage are normal. Four MOSFETs replace two tactile switches to control the "release" and "draw" of the solenoid valve. A start button enables the MCU to detect the solenoid valve.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the content of the present utility model specification should be included within the protection scope of the present utility model.

Claims

1. A detection circuit for an electromagnet in an electric door closer for fireproof doors, characterized in that: The system includes a power supply circuit, a relay control circuit, a microcontroller, a capacitor circuit, a bridge circuit for controlling current direction, and a detection feedback circuit. One output terminal of the power supply circuit is electrically connected to the input terminal of the capacitor circuit through the relay control circuit. The other output terminal of the power supply circuit is electrically connected to the power supply terminal of the microcontroller. The output terminal of the capacitor circuit is electrically connected to the input terminal of the bridge circuit. The control terminal of the bridge circuit is electrically connected to the control signal output terminal of the microcontroller. The output terminal of the bridge circuit is electrically connected to an external solenoid valve interface. The detection feedback circuit collects a detection signal and transmits it to the microcontroller. The microcontroller outputs a corresponding feedback signal based on the detection signal, which is then output externally via the detection feedback circuit.

2. The electromagnet detection circuit for an electric door closer according to claim 1, characterized in that: The power supply circuit includes a 24V power supply and a DC-DC circuit. One output terminal of the 24V power supply is electrically connected to the output terminal of the capacitor circuit through the relay control circuit, and the other output terminal of the 24V power supply supplies power to the microcontroller through the DC-DC circuit.

3. The electromagnet detection circuit for an electric door closer according to claim 2, characterized in that: The relay control circuit includes a relay JQ1, a diode D2, a resistor R30, a transistor Q1, a resistor R1, and a capacitor C1. The normally open input terminal of the relay JQ1 is electrically connected to the 24V power supply. The normally open output terminal of the relay JQ1 is grounded after passing through the resistor R1 and the capacitor C1 in sequence. The common terminal of the resistor R1 and the capacitor C1 serves as the output terminal VCC and is electrically connected to the capacitor circuit. One end of the coil of the relay JQ1 is electrically connected to the external 5V power supply. The other end of the coil of the relay JQ1 is electrically connected to the anode of the diode D2. The cathode of the diode D2 is electrically connected to one end of the coil of the relay JQ1. The other end of the coil of the relay JQ1 is electrically connected to the collector of the transistor Q1. The base of the transistor Q1 is electrically connected to the microcontroller through the resistor R30. The emitter of the transistor Q1 is grounded.

4. The electromagnet detection circuit for an electric door closer according to claim 1, characterized in that: The bridge circuit includes an electromagnet driving circuit and a MOSFET driving circuit. The MOSFET driving circuit receives the control signal output by the microcontroller and then outputs a control signal to the electromagnet driving circuit to control the electromagnet driving circuit to conduct in the forward or reverse direction.

5. The electromagnet detection circuit for an electric door closer according to claim 4, characterized in that: The MOS transistor driving circuit includes a forward driving module and a reverse driving module. The forward driving module includes a resistor R11, an optocoupler U4, and a resistor R9. The anode of the optocoupler U4 is electrically connected to an external 3.3V power supply through the resistor R11. The cathode of the optocoupler U4 is electrically connected to the microcontroller. The collector of the optocoupler U4 is electrically connected to the VCC power supply. The emitter of the optocoupler U4 is grounded through the resistor R9. The emitter of the optocoupler U4 also serves as a control output terminal and is electrically connected to the forward conduction control terminal of the electromagnet driving circuit. The reverse drive module includes a resistor R10, an optocoupler U3, and a resistor R8. The anode of the optocoupler U3 is electrically connected to an external 3.3V power supply through the resistor R10. The cathode of the optocoupler U3 is electrically connected to the microcontroller. The collector of the optocoupler U3 is electrically connected to the VCC power supply. The emitter of the optocoupler U3 is grounded through the resistor R8. The emitter of the optocoupler U3 also serves as a control output terminal and is electrically connected to the reverse conduction control terminal of the electromagnet drive circuit.

6. The electromagnet detection circuit for an electric door closer according to claim 5, characterized in that: The electromagnet drive circuit includes resistor R6, transistor Q2, resistor R2, MOSFET Q8, MOSFET Q9, resistor R3, transistor Q3, resistor R7, MOSFET Q6, MOSFET Q7, and solenoid valve connector J2. One end of resistor R6 is electrically connected to the control output terminal of the forward drive module, and the other end of resistor R6 is electrically connected to the base of transistor Q2. The emitter of transistor Q2 is grounded. The collector of transistor Q2 is electrically connected to the source of MOSFET Q8 through resistor R2. The gate of MOSFET Q8 is electrically connected to the collector of transistor Q2. The drain of MOSFET Q8 is electrically connected to the drain of MOSFET Q6. The source of MOSFET Q6 is grounded. The gate of MOSFET Q6 is electrically connected to the control output terminal of the reverse drive module. The source of MOSFET Q8 is also electrically connected to the VCC power supply. The base of transistor Q3 is electrically connected to the control output terminal of the reverse drive module through resistor R7. The emitter of transistor Q3 is grounded. The collector of transistor Q3 is electrically connected to the source of MOSFET Q9 through resistor R3. The source of MOSFET Q9 is electrically connected to the source of MOSFET Q8. The drain of MOSFET Q9 is electrically connected to the drain of MOSFET Q7. The source of MOSFET Q7 is electrically connected to the source of MOSFET Q6. The drain of MOSFET Q7 is electrically connected to one input terminal of solenoid valve connector J2. The drain of MOSFET Q6 is electrically connected to the other input terminal of solenoid valve connector J2. The output terminal of solenoid valve connector J2 is electrically connected to the electromagnet under test.

7. The electromagnet detection circuit for an electric door closer according to any one of claims 1-6, characterized in that: It also includes a capacitor voltage detection circuit, which includes resistors R26 and R28 and capacitor C29. One end of resistor R26 is electrically connected to the power supply VCC, and the other end of resistor R26 is grounded through resistor R28. The common terminal of resistors R26 and R28 is grounded through capacitor C29. The common terminal of resistors R26 and R28 is also used as an output terminal and electrically connected to the microcontroller.

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