CN213846225U - Timing and temperature-fixing leakage protection plug circuit - Google Patents
Timing and temperature-fixing leakage protection plug circuit Download PDFInfo
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- CN213846225U CN213846225U CN202022161853.7U CN202022161853U CN213846225U CN 213846225 U CN213846225 U CN 213846225U CN 202022161853 U CN202022161853 U CN 202022161853U CN 213846225 U CN213846225 U CN 213846225U
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Abstract
The utility model provides a regularly decide temperature earth leakage protection plug circuit, including K relay control module, silicon controlled rectifier control module, current detection module, zero cross detection module, steady voltage module, button module, single chip microcomputer control module, the electrified detection module of ground wire, display module, overheated detection module, short circuit detection module and temperature detection module. The utility model provides a pair of timing constant temperature earth leakage protection plug circuit has timing constant temperature the control unit through setting up at the earth leakage protection plug to replace the control unit in the current firing equipment, and provide earth leakage protection function, short circuit detection protect function, overcurrent protection function, temperature abnormity protect function and ground wire electrified protect function etc. and then guaranteeing firing equipment safety work, effectual saving cost when the guarantee user is safe in utilization.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a timing constant temperature earth leakage protection plug circuit.
Background
At present, for safety, the devices such as a heating towel rack, a heating table, a foot warmer and the like which are frequently contacted by a human body need to be additionally provided with an earth leakage protection plug, and most of the heating devices need a temperature control unit for temperature control.
However, in practice, it is found that most of common heating devices on the market at present are designed to be of an integrated structure with a temperature control unit and a heating device, and then are externally connected with an electric leakage protection plug, but when the temperature control unit breaks down, the temperature control unit in the heating device is difficult to maintain in time, and the electric leakage protection plug is difficult to perform timely on-off work, so that the safe work of the heating device cannot be ensured, and the use safety of users is guaranteed.
Therefore, it is desirable to provide a leakage protection plug circuit with a timing and temperature control function to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a timing and temperature setting earth leakage protection plug circuit, solved present heating equipment because of mostly with the control temperature unit with the heating equipment design be integrated structure when the control temperature unit breaks down, be difficult to in time maintain the control temperature unit in the heating equipment, and carry out the problem of timely switching on and switching off work to the earth leakage protection plug, have timing and temperature setting control unit through setting up at the earth leakage protection plug, with the control unit in replacing present heating equipment, and provide earth leakage protection function, short-circuit detection protect function, overcurrent protection function, temperature anomaly protect function and earth wire live protection function etc, and then guarantee the safe work of heating equipment, effectual saving cost when the guarantee user is safe in utilization.
In order to solve the technical problem, one technical solution adopted by the present invention is to provide a timing and temperature leakage protection plug circuit, which comprises a K1 relay control module (1), a K2 relay control module (2), a thyristor control module (3), a current detection module (4), a zero-crossing detection module (5), a voltage stabilization module (6), a key module (7), a single-chip microcomputer control module (8), a ground wire live detection module (9), a display module (10), an overheat detection module (11), a short-circuit detection module (12) and a temperature detection module (13); wherein the K2 relay control module (2), the SCR control module (3), the current detection module (4), the zero-cross detection module (5), the voltage stabilization module (6), the key module (7), the display module (10), the overheat detection module (11), the short-circuit detection module (12) and the temperature detection module (13) are respectively and electrically connected with the single-chip microcomputer control module (8), the K1 relay control module (1) is respectively and electrically connected with the K2 relay control module (2), the current detection module (4) and the zero-cross detection module (5), the K2 relay control module (2) is respectively and electrically connected with the SCR control module (3) and the current detection module (4), and the current detection module (4) is respectively and electrically connected with the SCR control module (3) and the ground wire live detection module (9), the voltage stabilizing module (6) is electrically connected between the K1 relay control module (1) and the K2 relay control module (2).
In the examples, it is preferred that:
the single-chip microcomputer control module (8) at least comprises a single-chip microcomputer chip (U3) with the model number of 89F1232, a capacitor (C4), a resistor (R14), a resistor (R15), a resistor (R16), a resistor (R17), a resistor (R18), a resistor (R19) and a resistor (R20);
the key module (7) at least comprises a resistor (R21), a resistor (R22), a resistor (R23), a key switch (S1), a key switch (S2) and a key switch (S3);
the display module (10) at least comprises a three-position nixie tube (LED 1);
the overheat detection module (11) at least comprises a resistor (R24) and a thermistor (RT 1);
the temperature detection module (13) at least comprises a resistor (R11), a thermistor (RT2) and a capacitor (C6);
wherein, the 1 st pin of the single chip (U3) is connected with one end of the capacitor (C4) and is grounded simultaneously, the 2 nd pin is connected with the 11 th pin of the three-position nixie tube (LED1) through the resistor (R14), the 3 rd pin is connected with the 5 th pin of the three-position nixie tube (LED1) through the resistor (R15), the 4 th pin is connected with the 4 th pin of the three-position nixie tube (LED1) through the resistor (R16), the 5 th pin is connected with the 2 nd pin of the three-position nixie tube (LED1) through the resistor (R17), the 6 th pin is connected with the 1 st pin of the three-position nixie tube (LED1) through the resistor (R18), the 7 th pin is connected with the 10 th pin of the three-position nixie tube (LED1) through the resistor (R19), the 8 th pin is connected with the 7 th pin of the three-position nixie tube (LED1) through the resistor (R20), the 9 th pin is connected with the third pin of the LED 3942) and the third pin (LED1) is connected with the third pin of the third pin (LED1) through the resistor (R20), The 11 th pin is connected with the 8 th pin of the three-position nixie tube (LED1), the 12 th pin is connected with one end of the resistor (R11), the 13 th pin is connected with the zero-crossing detection module (5), the 14 th pin is connected with the controlled silicon control module (3), the 15 th pin is connected with the K2 relay control module (2), and the 16 th pin is connected with the other end of the capacitor (C4) and is grounded simultaneously;
the No-load of the No. 3 pin and the No. 6 pin of the three-position nixie tube (LED 1);
one end of the resistor (R21), one end of the resistor (R22) and one end of the resistor (R23) are respectively connected with a pin 5, a pin 3 and a pin 4 of the singlechip chip (U3), and the other ends of the resistor (R21), the resistor (R22) and the resistor (R23) are respectively grounded through the key switch (S1), the key switch (S2) and the key switch (S3);
one end of the resistor (R24) and one end of the thermistor (RT1) are connected with the 6 th pin of the singlechip chip (U3), and the other ends of the resistor (R24) and the thermistor (RT1) are grounded;
thermistor (RT2) with the parallel circuit one end of electric capacity (C6) and the one end of resistance (R11) connects the 12 th foot of singlechip chip (U3), thermistor (RT2) with the parallel circuit other end of electric capacity (C6) and the other end ground connection of resistance (R11).
In the examples, it is preferred that:
the K1 relay control module (1) at least comprises a diode (D1), a relay coil (K1), a controlled silicon (Q1), a capacitor (C3) and a resistor (R25);
the current detection module (4) at least comprises a current detection chip (U1) with the model of GRS54123, a resistor (R1), a resistor (R2), a resistor (R3), a resistor (R5), a resistor (R6), a resistor (R7), a capacitor (C1), a capacitor (C2), a mutual inductor (L2) and a mutual inductor (L3);
the zero-crossing detection module (5) at least comprises a resistor (R8), a resistor (R28) and a resistor (R30);
the ground wire live detection module (9) at least comprises a resistor (R26), a resistor (R27), a resistor (R31), a triode (Q5) and a diode (D6);
the 1 st pin of the current detection chip (U1) is connected between the resistor (R5) and the resistor (R6), the 2 nd pin is connected with one end of the resistor (R7), the 3 rd pin and the 4 th pin are grounded, the 5 th pin is grounded through the capacitor (C2), the 6 th pin is unloaded, the 7 th pin is connected with one end of the resistor (R25), and the 8 th pin is connected with one end of the capacitor (C1);
the mutual inductor (L2) is sleeved on the zero line and the live line, the mutual inductor (L3) is sleeved on the live line, the head end of the mutual inductor (L2) is connected with the resistor (R6), the tail end is connected with the head end of the mutual inductor (L3), the tail end of the mutual inductor (L3) is connected with the resistor (R5), the resistor (R5) is connected with the resistor (R6), one end of a series circuit of the resistor (R1) and the resistor (R3) is connected between the head end of the transformer (L2) and the resistor (R6), the other end of the series circuit is connected between the tail end of the transformer (L3) and the resistor (R5), the other end of the resistor (R7) is connected with the head end of the mutual inductor (L3) through the resistor (R1) and the resistor (R3), one end of the resistor (R2) is connected between the pin 8 of the current detection chip (U1) and the capacitor (C1);
the anode of the diode (D1) is connected with the zero line, the relay coil (K1) is connected between the cathode of the diode (D1) and the anode of the thyristor (Q1), the control pole of the thyristor (Q1) is connected with the 7 th pin of the current detection chip (U1) through the resistor (R25), the cathode of the thyristor (Q1) is grounded, the capacitor (C3) is connected between the cathode and the control pole of the thyristor (Q1) in parallel, and the other end of the capacitor (C1) is connected with the cathode of the thyristor (Q1);
one end of a series circuit of the resistor (R8), the resistor (R28) and the resistor (R30) is grounded, and the other end of the series circuit passes through the other end of the resistor (R2) and is arranged between the relay coil (K1) and the anode of the thyristor (Q1);
the collector and the emitter of triode (Q5) pass through respectively resistance (R31) with the series circuit of resistance (R26) and resistance (R27) connect the base of triode (Q5), and the one end of resistance (R4) connects simultaneously resistance (R26) with zero line, the other end pass through key switch (S1) ground connection, the negative pole of diode (D6) connect in resistance (R27) with between resistance (R4), positive pole ground connection.
In the examples, it is preferred that:
the K2 relay control module (2) at least comprises a triode (Q2), a relay coil (K2), a resistor (R12), a resistor (R29) and a diode (D5);
the silicon controlled rectifier control module (3) at least comprises a silicon controlled rectifier (Q3), a resistor (R13) and a resistor (R41);
the base electrode of the triode (Q2) is connected with the 15 th pin of the singlechip chip (U3) through the resistor (R12), the emitter electrode of the triode (Q2) is connected between the base electrode of the triode (Q2) and the resistor (R12) through the resistor (R29) and is simultaneously grounded, one end of a parallel circuit of the diode (D5) and the relay coil (K2) is connected with the collector electrode of the triode (Q2), and the other end of the parallel circuit is grounded;
one end of a series circuit of the resistor (R13) and the resistor (R41) is connected with a control electrode of the controlled silicon (Q3), the other end of the series circuit is connected with a 14 th pin of the singlechip chip (U3), and a cathode and an anode of the controlled silicon (Q3) are connected with the live wire and are connected with the relay coil (K2) in parallel.
In the examples, it is preferred that:
the voltage stabilizing module (6) at least comprises a voltage stabilizing chip (U2) with the model number of BP2902, a resistor (R9), a resistor (R10), an electrolytic capacitor (E1), an electrolytic capacitor (E2), a capacitor (C5), a diode (D2), a diode (D3), a diode (D4) and an inductor (L1);
the 1 st pin of the voltage stabilizing chip (U2) is connected with the cathode of the diode (D4), the 2 nd pin and the 3 rd pin are grounded, the 4 th pin is connected with one end of the resistor (R9), and the 5 th pin and the 6 th pin are connected with the cathode of the diode (D2);
the capacitor (C5) is connected between the 1 st pin and the 3 rd pin of the voltage stabilization chip (U2), the resistor (R9) is connected between the 3 rd pin and the 4 th pin of the voltage stabilization chip (U2), the cathode of the diode (D3) is connected with the other end of the resistor (R9), the anode of the diode (D4) is connected with one end of the resistor (R10), one end of the inductor (L1) is connected between the resistor (R9) and the cathode of the diode (D3), the other end of the inductor is connected with the ground and is simultaneously connected between the resistor (R10) and the anode of the diode (D4), one end of the electrolytic capacitor (E2) is connected with the ground, the other end of the capacitor (L1), the anode of the diode (D2) is connected with the zero line through a fuse wire (FR1), and one end of the electrolytic capacitor (E1) is connected between the cathode of the diode (D2) and the first pin of the voltage stabilization chip (U2) 6, The other end of the voltage-dependent Resistor (RV) is grounded and is connected with the live wire, one end of the voltage-dependent Resistor (RV) is connected between the live wire and the electrolytic capacitor (E1), and the other end of the voltage-dependent Resistor (RV) is connected between the zero line and the fuse (FR 1).
In the examples, it is preferred that:
the short circuit detection module (12) at least comprises a resistor (R32), a resistor (R34), a resistor (R35), a resistor (R36), a resistor (R37), a resistor (R38), a resistor (R39), a resistor (R40), a capacitor (C7), a diode (D8), a diode (D9), a diode (D10), a triode (Q6) and a triode (Q7);
wherein, the emitter of the triode (Q6) is connected with the zero line through the resistor (R34), the base is connected with the live line through the series circuit of the resistor (R36) and the diode (D8), the collector is connected with the ground through the diode (D10), the resistor (R39) and the capacitor (C7), the emitter of the triode (Q7) is grounded, the base is connected between the resistor (R39) and the capacitor (C7) through the resistor (R40), the collector is grounded through the resistor (R38), one end of the series circuit of the diode (D9), the resistor (R35) and the resistor (R37) is connected with the live line, and the other end is grounded;
the emitter of triode (Q4) is connected with the 7 th pin of current detection chip (U1) through resistance (R33) with between resistance (R25), base ground, collecting electrode connect with between resistance (R32) and diode (D7), one end of resistance (R32) connect with between the collecting electrode of triode (Q7) and resistance (R38), another end connects the positive pole of diode (D7), the negative pole of diode (D7) connects the 9 th pin of singlechip chip (U3).
In the examples, it is preferred that:
the transistor (Q2), the transistor (Q4), the transistor (Q5), the transistor (Q6) and the transistor (Q7) are PNP transistors.
The utility model has the advantages that: the utility model provides a pair of timing and temperature setting earth leakage protection plug circuit, solved present heating equipment because of the most control temperature unit and heating equipment design be integrated structure and when the control temperature unit breaks down, be difficult to in time maintain the control temperature unit in the heating equipment, and carry out the problem of timely circular telegram outage work to the earth leakage protection plug, have timing and temperature setting the control unit through setting up at the earth leakage protection plug, with replace the control unit in the current heating equipment, and provide the earth leakage protection function, short-circuit detection protect function, overcurrent protection function, temperature anomaly protect function and ground wire live protection function etc., and then ensure heating equipment safety work, effectual saving cost when the guarantee user is safe in utilization.
Drawings
Fig. 1 is a schematic block diagram of a circuit structure of a first preferred embodiment of a timing and temperature setting earth leakage protection plug circuit of the present invention;
fig. 2 is a schematic circuit diagram of a timing and temperature earth leakage protection plug circuit according to a first preferred embodiment of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the drawings.
Referring to fig. 1, a timing and temperature-setting leakage protection plug circuit of the present embodiment includes a K1 relay control module (1), a K2 relay control module (2), a thyristor control module (3), a current detection module (4), a zero-cross detection module (5), a voltage stabilization module (6), a key module (7), a single-chip microcomputer control module (8), a ground wire live detection module (9), a display module (10), an overheat detection module (11), a short-circuit detection module (12), and a temperature detection module (13); wherein the K2 relay control module (2), the SCR control module (3), the current detection module (4), the zero-cross detection module (5), the voltage stabilization module (6), the key module (7), the display module (10), the overheat detection module (11), the short-circuit detection module (12) and the temperature detection module (13) are respectively and electrically connected with the single-chip microcomputer control module (8), the K1 relay control module (1) is respectively and electrically connected with the K2 relay control module (2), the current detection module (4) and the zero-cross detection module (5), the K2 relay control module (2) is respectively and electrically connected with the SCR control module (3) and the current detection module (4), and the current detection module (4) is respectively and electrically connected with the SCR control module (3) and the ground wire live detection module (9), the voltage stabilizing module (6) is electrically connected between the K1 relay control module (1) and the K2 relay control module (2).
In the embodiment, the timing and temperature-fixing controller is integrated into the leakage protection plug, the timing and heating temperature can be set through the keys of the key module (7), the display is carried out through the display module (10) and the nixie tube display screen, the temperature of the heater is collected through the singlechip of the singlechip control module (8), the heating temperature is intelligently adjusted through the silicon controlled rectifier of the silicon controlled rectifier control module (3), and the temperature is kept constant according to a set value;
meanwhile, whether the equipment has the abnormalities such as electric leakage, overcurrent and short circuit detection, electrified ground wires and failure of a temperature probe can be monitored by the aid of the current detection module (4), the zero-crossing detection module (5), the ground wire electrification detection module (9), the overheat detection module (11), the short circuit detection module (12) and the temperature detection module (13), and if the abnormalities exist, the relay can be controlled to be immediately disconnected and output by the aid of the abnormal K1 relay control module (1) and the K2 relay control module (2), so that use safety of the equipment is guaranteed.
It can be seen that, implementing a timing and temperature setting earth leakage protection plug circuit described in fig. 1, when the control temperature unit fails due to the fact that most of the heating devices are designed as an integrated structure with the heating devices, it is difficult to timely maintain the control temperature unit in the heating devices, and timely power on/off operation is performed on the earth leakage protection plug, the timing and temperature setting control unit is provided in the earth leakage protection plug to replace the control unit in the existing heating devices, and an earth leakage protection function, a short circuit detection protection function, an overcurrent protection function, a temperature abnormality protection function, an earth wire live protection function and the like are provided, so that safe operation of the heating devices is ensured, and cost is effectively saved while use safety of users is ensured.
In addition, the timing and temperature setting leakage protection plug circuit described in the figure 1 can be used for immediately tripping and disconnecting output after the equipment is abnormal, so that the electric equipment is safer and more reliable, and safety guarantee is added to the electric equipment for people.
Referring to fig. 2, in the embodiment of the present invention, it is preferable that:
the single-chip microcomputer control module (8) at least comprises a single-chip microcomputer chip (U3) with the model number of 89F1232, a capacitor (C4), a resistor (R14), a resistor (R15), a resistor (R16), a resistor (R17), a resistor (R18), a resistor (R19) and a resistor (R20);
the key module (7) at least comprises a resistor (R21), a resistor (R22), a resistor (R23), a key switch (S1), a key switch (S2) and a key switch (S3);
the display module (10) at least comprises a three-position nixie tube (LED 1);
the overheat detection module (11) at least comprises a resistor (R24) and a thermistor (RT 1);
the temperature detection module (13) at least comprises a resistor (R11), a thermistor (RT2) and a capacitor (C6);
wherein, the 1 st pin of the single chip (U3) is connected with one end of the capacitor (C4) and is grounded simultaneously, the 2 nd pin is connected with the 11 th pin of the three-position nixie tube (LED1) through the resistor (R14), the 3 rd pin is connected with the 5 th pin of the three-position nixie tube (LED1) through the resistor (R15), the 4 th pin is connected with the 4 th pin of the three-position nixie tube (LED1) through the resistor (R16), the 5 th pin is connected with the 2 nd pin of the three-position nixie tube (LED1) through the resistor (R17), the 6 th pin is connected with the 1 st pin of the three-position nixie tube (LED1) through the resistor (R18), the 7 th pin is connected with the 10 th pin of the three-position nixie tube (LED1) through the resistor (R19), the 8 th pin is connected with the 7 th pin of the three-position nixie tube (LED1) through the resistor (R20), the 9 th pin is connected with the 10 th pin of the three-position nixie tube (LED1), and the third pin (LED1) is connected with the third pin (LED 6778) through the resistor (R20), The 11 th pin is connected with the 8 th pin of the three-position nixie tube (LED1), the 12 th pin is connected with one end of the resistor (R11), the 13 th pin is connected with the zero-crossing detection module (5), the 14 th pin is connected with the controlled silicon control module (3), the 15 th pin is connected with the K2 relay control module (2), and the 16 th pin is connected with the other end of the capacitor (C4) and is grounded simultaneously;
the No-load of the No. 3 pin and the No. 6 pin of the three-position nixie tube (LED 1);
one end of the resistor (R21), one end of the resistor (R22) and one end of the resistor (R23) are respectively connected with a pin 5, a pin 3 and a pin 4 of the singlechip chip (U3), and the other ends of the resistor (R21), the resistor (R22) and the resistor (R23) are respectively grounded through the key switch (S1), the key switch (S2) and the key switch (S3);
one end of the resistor (R24) and one end of the thermistor (RT1) are connected with the 6 th pin of the singlechip chip (U3), and the other ends of the resistor (R24) and the thermistor (RT1) are grounded;
thermistor (RT2) with the parallel circuit one end of electric capacity (C6) and the one end of resistance (R11) connects the 12 th foot of singlechip chip (U3), thermistor (RT2) with the parallel circuit other end of electric capacity (C6) and the other end ground connection of resistance (R11).
Referring to fig. 2, in the embodiment of the present invention, it is preferable that:
the K1 relay control module (1) at least comprises a diode (D1), a relay coil (K1), a controlled silicon (Q1), a capacitor (C3) and a resistor (R25);
the current detection module (4) at least comprises a current detection chip (U1) with the model of GRS54123, a resistor (R1), a resistor (R2), a resistor (R3), a resistor (R5), a resistor (R6), a resistor (R7), a capacitor (C1), a capacitor (C2), a mutual inductor (L2) and a mutual inductor (L3);
the zero-crossing detection module (5) at least comprises a resistor (R8), a resistor (R28) and a resistor (R30);
the ground wire live detection module (9) at least comprises a resistor (R26), a resistor (R27), a resistor (R31), a triode (Q5) and a diode (D6);
the 1 st pin of the current detection chip (U1) is connected between the resistor (R5) and the resistor (R6), the 2 nd pin is connected with one end of the resistor (R7), the 3 rd pin and the 4 th pin are grounded, the 5 th pin is grounded through the capacitor (C2), the 6 th pin is unloaded, the 7 th pin is connected with one end of the resistor (R25), and the 8 th pin is connected with one end of the capacitor (C1);
the mutual inductor (L2) is sleeved on the zero line and the live line, the mutual inductor (L3) is sleeved on the live line, the head end of the mutual inductor (L2) is connected with the resistor (R6), the tail end is connected with the head end of the mutual inductor (L3), the tail end of the mutual inductor (L3) is connected with the resistor (R5), the resistor (R5) is connected with the resistor (R6), one end of a series circuit of the resistor (R1) and the resistor (R3) is connected between the head end of the transformer (L2) and the resistor (R6), the other end of the series circuit is connected between the tail end of the transformer (L3) and the resistor (R5), the other end of the resistor (R7) is connected with the head end of the mutual inductor (L3) through the resistor (R1) and the resistor (R3), one end of the resistor (R2) is connected between the pin 8 of the current detection chip (U1) and the capacitor (C1);
the anode of the diode (D1) is connected with the zero line, the relay coil (K1) is connected between the cathode of the diode (D1) and the anode of the thyristor (Q1), the control pole of the thyristor (Q1) is connected with the 7 th pin of the current detection chip (U1) through the resistor (R25), the cathode of the thyristor (Q1) is grounded, the capacitor (C3) is connected between the cathode and the control pole of the thyristor (Q1) in parallel, and the other end of the capacitor (C1) is connected with the cathode of the thyristor (Q1);
one end of a series circuit of the resistor (R8), the resistor (R28) and the resistor (R30) is grounded, and the other end of the series circuit passes through the other end of the resistor (R2) and is arranged between the relay coil (K1) and the anode of the thyristor (Q1);
the collector and the emitter of triode (Q5) pass through respectively resistance (R31) with the series circuit of resistance (R26) and resistance (R27) connect the base of triode (Q5), and the one end of resistance (R4) connects simultaneously resistance (R26) with zero line, the other end pass through key switch (S1) ground connection, the negative pole of diode (D6) connect in resistance (R27) with between resistance (R4), positive pole ground connection.
Referring to fig. 2, in the embodiment of the present invention, it is preferable that:
the K2 relay control module (2) at least comprises a triode (Q2), a relay coil (K2), a resistor (R12), a resistor (R29) and a diode (D5);
the silicon controlled rectifier control module (3) at least comprises a silicon controlled rectifier (Q3), a resistor (R13) and a resistor (R41);
the base electrode of the triode (Q2) is connected with the 15 th pin of the singlechip chip (U3) through the resistor (R12), the emitter electrode of the triode (Q2) is connected between the base electrode of the triode (Q2) and the resistor (R12) through the resistor (R29) and is simultaneously grounded, one end of a parallel circuit of the diode (D5) and the relay coil (K2) is connected with the collector electrode of the triode (Q2), and the other end of the parallel circuit is grounded;
one end of a series circuit of the resistor (R13) and the resistor (R41) is connected with a control electrode of the controlled silicon (Q3), the other end of the series circuit is connected with a 14 th pin of the singlechip chip (U3), and a cathode and an anode of the controlled silicon (Q3) are connected with the live wire and are connected with the relay coil (K2) in parallel.
Referring to fig. 2, in the embodiment of the present invention, it is preferable that:
the voltage stabilizing module (6) at least comprises a voltage stabilizing chip (U2) with the model number of BP2902, a resistor (R9), a resistor (R10), an electrolytic capacitor (E1), an electrolytic capacitor (E2), a capacitor (C5), a diode (D2), a diode (D3), a diode (D4) and an inductor (L1);
the 1 st pin of the voltage stabilizing chip (U2) is connected with the cathode of the diode (D4), the 2 nd pin and the 3 rd pin are grounded, the 4 th pin is connected with one end of the resistor (R9), and the 5 th pin and the 6 th pin are connected with the cathode of the diode (D2);
the capacitor (C5) is connected between the 1 st pin and the 3 rd pin of the voltage stabilization chip (U2), the resistor (R9) is connected between the 3 rd pin and the 4 th pin of the voltage stabilization chip (U2), the cathode of the diode (D3) is connected with the other end of the resistor (R9), the anode of the diode (D4) is connected with one end of the resistor (R10), one end of the inductor (L1) is connected between the resistor (R9) and the cathode of the diode (D3), the other end of the inductor is connected with the ground and is simultaneously connected between the resistor (R10) and the anode of the diode (D4), one end of the electrolytic capacitor (E2) is connected with the ground, the other end of the capacitor (L1), the anode of the diode (D2) is connected with the zero line through a fuse wire (FR1), and one end of the electrolytic capacitor (E1) is connected between the cathode of the diode (D2) and the first pin of the voltage stabilization chip (U2) 6, The other end of the voltage-dependent Resistor (RV) is grounded and is connected with the live wire, one end of the voltage-dependent Resistor (RV) is connected between the live wire and the electrolytic capacitor (E1), and the other end of the voltage-dependent Resistor (RV) is connected between the zero line and the fuse (FR 1).
Referring to fig. 2, in the embodiment of the present invention, it is preferable that:
the short circuit detection module (12) at least comprises a resistor (R32), a resistor (R34), a resistor (R35), a resistor (R36), a resistor (R37), a resistor (R38), a resistor (R39), a resistor (R40), a capacitor (C7), a diode (D8), a diode (D9), a diode (D10), a triode (Q6) and a triode (Q7);
wherein, the emitter of the triode (Q6) is connected with the zero line through the resistor (R34), the base is connected with the live line through the series circuit of the resistor (R36) and the diode (D8), the collector is connected with the ground through the diode (D10), the resistor (R39) and the capacitor (C7), the emitter of the triode (Q7) is grounded, the base is connected between the resistor (R39) and the capacitor (C7) through the resistor (R40), the collector is grounded through the resistor (R38), one end of the series circuit of the diode (D9), the resistor (R35) and the resistor (R37) is connected with the live line, and the other end is grounded;
the emitter of triode (Q4) is connected with the 7 th pin of current detection chip (U1) through resistance (R33) with between resistance (R25), base ground, collecting electrode connect with between resistance (R32) and diode (D7), one end of resistance (R32) connect with between the collecting electrode of triode (Q7) and resistance (R38), another end connects the positive pole of diode (D7), the negative pole of diode (D7) connects the 9 th pin of singlechip chip (U3).
Referring to fig. 2, in the embodiment of the present invention, it is preferable that:
the transistor (Q2), the transistor (Q4), the transistor (Q5), the transistor (Q6) and the transistor (Q7) are PNP transistors.
In the embodiment, for the K1 relay control module (1), current can reach the controlled silicon (Q1) after being rectified by the diode (D1) and the relay coil (K1), the control pin of the controlled silicon (Q1) is connected to the output pin of the current detection chip (U1) through the resistor (R25), if the current detection chip (U1) detects a preset current value, a high level is output to trigger the controlled silicon (Q1) to be switched on, and then the relay coil (K1) is tripped to be disconnected for output, so that the function of overcurrent protection is achieved;
for the K2 relay control module (2), the triode Q2 is controlled to be switched on and off through the pin 15 of the single chip (U3), namely the pin 15 of the single chip (U3) pulls down the control pin of the triode Q2 through the resistor R12, so that the triode Q2 is switched on and flows through the relay coil (K2), the relay coil (K2) is electrified, attracted and switched on, if the pin 15 of the single chip (U3) gives a high-level resistor R12, the triode Q2Q2 is switched off, the relay coil (K2) loses current, and the relay is switched off;
and for the silicon controlled control module (3), the triode Q2 can be controlled by the single chip microcomputer chip (U3) to be switched on and off, the single chip microcomputer chip (U3) pulls down the control pin of the single chip microcomputer chip (U3) through the resistor R12, the single chip microcomputer chip (U3) is switched on and flows through the relay coil (K2), the relay coil (K2) is electrified, attracted and switched on, if the single chip microcomputer chip (U3) gives the high-level relay coil (K2), the triode Q2 is switched off, the relay coil (K2) loses current, and the relay is switched off;
and, as for the current detection module (4), can be divided into leakage current detection and overcurrent detection;
and after the leakage current detection is induced to the leakage current through a mutual inductor (L2), an induced current value is set through a resistor R1, and a voltage value is obtained and is input to a pin 1 and a pin 2 of a current detection chip (U1) through a resistor R6 and a resistor R7; the current detection chip (U1) amplifies a signal to latch and output, and controls the conduction of the controlled silicon (Q1) through a resistor R25;
and the overcurrent detection is that after the current leakage is induced by the mutual inductor (L2), an induced current value is set through the resistor R3, and a voltage value is obtained and is input to the pin 1 and the pin 2 of the current detection chip (U1) through the resistor R5 and the resistor R7; the current detection chip (U1) amplifies a signal to latch and output, and controls the conduction of the controlled silicon (Q1) through a resistor R25;
for the zero-crossing detection module (5), the voltage is rectified by a diode D1 and then is input to a pin 13 of a singlechip chip (U3) through the voltage division of a resistor R30, a resistor R28 and a resistor R8;
and, regarding the voltage stabilizing module (6), see through the fuse FR1 wire winding resistance through diode D2 rectification to the voltage stabilizing chip (U2);
and, as for the key module (7), connect to pin 5 of the single-chip computer chip (U3) through resistance R21 and resistance R17 by the key switch (S2); the key switch S3 is connected to the pin 3 of the single chip microcomputer chip (U3) through a resistor R22 and a resistor R15; the key switch S4 is connected to the pin 4 of the single chip microcomputer chip (U3) through a resistor R23 and a resistor R16;
and for the ground wire live detection module (9), it is made up of diode D6, triode Q5, resistance R26, resistance R27 and resistance R31, if the ground wire PE point is electrified, after diode D6 rectification and resistance R27 and resistance R26 voltage division, can make triode Q5 conduct, and the electric current forms the parallel connection and conducts through resistance R31 and resistance R4, and then pass mutual-inductor L2, produce the drain current, and then disconnect the output;
and, for the overheat detection module (11), consisting of a resistor R24 and a thermistor RT 1; one end of the thermistor RT1 is connected to a pin 6 of the singlechip chip (U3) through a resistor R18, and when the temperature exceeds a set value, the singlechip chip (U3) can perform corresponding power-off protection.
It can be seen that, implementing a timing and temperature setting earth leakage protection plug circuit described in fig. 2, when the control temperature unit fails due to the fact that most of the heating devices are designed as an integrated structure with the heating devices, it is difficult to timely maintain the control temperature unit in the heating devices, and timely power on/off operation is performed on the earth leakage protection plug, the timing and temperature setting control unit is provided in the earth leakage protection plug to replace the control unit in the existing heating devices, and an earth leakage protection function, a short circuit detection protection function, an overcurrent protection function, a temperature abnormality protection function, an earth wire live protection function and the like are provided, so that safe operation of the heating devices is ensured, and cost is effectively saved while use safety of users is ensured.
The above is only the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same reason as the protection scope of the present invention.
Claims (7)
1. The utility model provides a timing temperature earth leakage protection plug circuit which characterized in that: the device comprises a K1 relay control module (1), a K2 relay control module (2), a silicon controlled rectifier control module (3), a current detection module (4), a zero-crossing detection module (5), a voltage stabilizing module (6), a key module (7), a single-chip microcomputer control module (8), a ground wire live detection module (9), a display module (10), an overheating detection module (11), a short-circuit detection module (12) and a temperature detection module (13); wherein the K2 relay control module (2), the SCR control module (3), the current detection module (4), the zero-cross detection module (5), the voltage stabilization module (6), the key module (7), the display module (10), the overheat detection module (11), the short-circuit detection module (12) and the temperature detection module (13) are respectively and electrically connected with the single-chip microcomputer control module (8), the K1 relay control module (1) is respectively and electrically connected with the K2 relay control module (2), the current detection module (4) and the zero-cross detection module (5), the K2 relay control module (2) is respectively and electrically connected with the SCR control module (3) and the current detection module (4), and the current detection module (4) is respectively and electrically connected with the SCR control module (3) and the ground wire live detection module (9), the voltage stabilizing module (6) is electrically connected between the K1 relay control module (1) and the K2 relay control module (2).
2. A leakage protection plug circuit according to claim 1, wherein:
the single-chip microcomputer control module (8) at least comprises a single-chip microcomputer chip U3 with the model number of 89F1232, a capacitor C4, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, a resistor R19 and a resistor R20;
the key module (7) at least comprises a resistor R21, a resistor R22, a resistor R23, a key switch S1, a key switch S2 and a key switch S3;
the display module (10) at least comprises a three-position nixie tube LED 1;
the overheat detection module (11) at least comprises a resistor R24 and a thermistor RT 1;
the temperature detection module (13) at least comprises a resistor R11, a thermistor RT2 and a capacitor C6;
wherein, the 1 st pin of the single chip U3 is connected with one end of the capacitor C4 and is grounded simultaneously, the 2 nd pin is connected with the 11 th pin of the three-position nixie tube LED1 through the resistor R14, the 3 rd pin is connected with the 5 th pin of the three-position nixie tube LED1 through the resistor R15, the 4 th pin is connected with the 4 th pin of the three-position nixie tube LED1 through the resistor R16, the 5 th pin is connected with the 2 nd pin of the three-position nixie tube LED1 through the resistor R17, the 6 th pin is connected with the 1 st pin of the three-position nixie tube LED1 through the resistor R18, the 7 th pin is connected with the 10 th pin of the three-position nixie tube LED1 through the resistor R19, the 8 th pin is connected with the 7 th pin of the three-position nixie tube LED1 through the resistor R20, the 9 th pin is connected with the 12 th pin of the three-position nixie tube LED1, the 10 th pin is connected with the 9 th pin of the three-position nixie tube LED1, the 11 th pin is connected with the third pin R1, the resistor R11 is connected with the 9 th pin of the third pin, The 13 th pin is connected with the zero-crossing detection module (5), the 14 th pin is connected with the controllable silicon control module (3), the 15 th pin is connected with the K2 relay control module (2), and the 16 th pin is connected with the other end of the capacitor C4 and is grounded simultaneously;
the No-load of the No-load 3 rd pin and the No-load 6 th pin of the three-position nixie tube LED 1;
one end of the resistor R21, one end of the resistor R22, and one end of the resistor R23 are respectively connected to the 5 th pin, the 3 rd pin, and the 4 th pin of the monolithic chip U3, and the other ends of the resistor R21, the resistor R22, and the resistor R23 are respectively grounded through the key switch S1, the key switch S2, and the key switch S3;
one end of the resistor R24 and one end of the thermistor RT1 are connected with the 6 th pin of the singlechip chip U3, and the other ends of the resistor R24 and the thermistor RT1 are grounded;
thermistor RT2 with the parallel circuit one end of electric capacity C6 and one end of resistance R11 connect the 12 th foot of singlechip chip U3, thermistor RT2 with the parallel circuit other end of electric capacity C6 and the other end ground connection of resistance R11.
3. A leakage protection plug circuit according to claim 2, wherein:
the K1 relay control module (1) at least comprises a diode D1, a relay coil K1, a controllable silicon Q1, a capacitor C3 and a resistor R25;
the current detection module (4) at least comprises a current detection chip U1 with the model number of GRS54123, a resistor R1, a resistor R2, a resistor R3, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a capacitor C2, a mutual inductor L2 and a mutual inductor L3;
the zero-crossing detection module (5) at least comprises a resistor R8, a resistor R28 and a resistor R30;
the ground wire live detection module (9) at least comprises a resistor R26, a resistor R27, a resistor R31, a triode Q5 and a diode D6;
the 1 st pin of the current detection chip U1 is connected between the resistor R5 and the resistor R6, the 2 nd pin is connected with one end of the resistor R7, the 3 rd pin and the 4 th pin are grounded, the 5 th pin is grounded through the capacitor C2, the 6 th pin is unloaded, the 7 th pin is connected with one end of the resistor R25, and the 8 th pin is connected with one end of the capacitor C1;
the transformer L2 is sleeved on a neutral wire and a live wire, the transformer L3 is sleeved on the live wire, the head end of the transformer L2 is connected with the resistor R6, the tail end of the transformer L3 is connected with the head end of the transformer L3, the tail end of the transformer L3 is connected with the resistor R5, the resistor R5 is connected with the resistor R6, one end of a series circuit of the resistor R1 and the resistor R3 is connected between the head end of the transformer L2 and the resistor R6, the other end of the series circuit is connected between the tail end of the transformer L3 and the resistor R5, the other end of the resistor R7 is connected between the resistor R1 and the resistor R3 with the head end of the transformer L3, and one end of the resistor R2 is connected between the 8 th pin of the current detection chip U1 and the capacitor C1;
the anode of the diode D1 is connected with the zero line, the relay coil K1 is connected between the cathode of the diode D1 and the anode of the controlled silicon Q1, the control electrode of the controlled silicon Q1 is connected with the 7 th pin of the current detection chip U1 through the resistor R25, the cathode of the controlled silicon Q1 is grounded, the capacitor C3 is connected between the cathode and the control electrode of the controlled silicon Q1 in parallel, and the other end of the capacitor C1 is connected with the cathode of the controlled silicon Q1;
one end of a series circuit of the resistor R8, the resistor R28 and the resistor R30 is grounded, and the other end of the series circuit passes through the other end of the resistor R2 and is arranged between the relay coil K1 and the anode of the controllable silicon Q1;
the collector and the emitter of the triode Q5 are respectively connected with the base of the triode Q5 through the series circuit of the resistor R31 and the resistor R26 and the resistor R27, one end of the resistor R4 is connected with the resistor R26 and the zero line at the same time, the other end of the resistor R4 is grounded through a key switch S1, the cathode of the diode D6 is connected between the resistor R27 and the resistor R4, and the anode of the diode D6 is grounded.
4. A leakage protection plug circuit according to claim 3, wherein:
the K2 relay control module (2) at least comprises a triode Q2, a relay coil K2, a resistor R12, a resistor R29 and a diode D5;
the silicon controlled control module (3) at least comprises a silicon controlled transistor Q3, a resistor R13 and a resistor R41;
the base electrode of the triode Q2 is connected with the 15 th pin of the singlechip chip U3 through the resistor R12, the emitter electrode of the triode Q2 is connected between the base electrode of the triode Q2 and the resistor R12 through the resistor R29 and is grounded at the same time, one end of a parallel circuit of the diode D5 and the relay coil K2 is connected with the collector electrode of the triode Q2, and the other end of the parallel circuit is grounded;
one end of a series circuit of the resistor R13 and the resistor R41 is connected with a control electrode of the controlled silicon Q3, the other end of the series circuit is connected with a 14 th pin of the singlechip chip U3, and a cathode and an anode of the controlled silicon Q3 are connected with the live wire and are connected with the relay coil K2 in parallel.
5. A leakage protection plug circuit according to claim 4, wherein:
the voltage stabilizing module (6) at least comprises a voltage stabilizing chip U2 with the model number of BP2902, a resistor R9, a resistor R10, an electrolytic capacitor E1, an electrolytic capacitor E2, a capacitor C5, a diode D2, a diode D3, a diode D4 and an inductor L1;
the 1 st pin of the voltage stabilizing chip U2 is connected with the cathode of the diode D4, the 2 nd pin and the 3 rd pin are grounded, the 4 th pin is connected with one end of the resistor R9, and the 5 th pin and the 6 th pin are connected with the cathode of the diode D2;
the capacitor C5 is connected between the 1 st pin and the 3 rd pin of the voltage regulator chip U2, the resistor R9 is connected between the 3 rd pin and the 4 th pin of the voltage regulator chip U2, the cathode of the diode D3 is connected with the other end of the resistor R9, the anode of the diode D4 is connected with one end of the resistor R10, one end of the inductor L1 is connected between the resistor R9 and the cathode of the diode D3, the other end of the inductor L1 is grounded and is simultaneously connected between the resistor R10 and the anode of the diode D4, one end of the electrolytic capacitor E2 is grounded and the other end of the capacitor L1, the anode of the diode D2 is connected with the zero line through a fuse FR1, one end of the electrolytic capacitor E32 is connected between the cathode of the diode D2 and the 6 th pin of the voltage regulator chip U2, the other end of the electrolytic capacitor E1 is grounded and is connected with the live line, and one end of the live line of the live wire RV is connected between the live wire and the electrolytic capacitor E1, The other end is connected between the zero line and the fuse FR 1.
6. A leakage protection plug circuit according to claim 5, wherein:
the short circuit detection module (12) at least comprises a resistor R32, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, a resistor R39, a resistor R40, a capacitor C7, a diode D8, a diode D9, a diode D10, a triode Q6 and a triode Q7;
the emitter of the triode Q6 is connected with the zero line through the resistor R34, the base is connected with the live line through the series circuit of the resistor R36 and the diode D8, the collector is connected with the ground through the diode D10 and the resistor R39 and the capacitor C7, the emitter and the base of the triode Q7 are connected between the resistor R39 and the capacitor C7 through the resistor R40, the collector is connected with the ground through the resistor R38, and one end of the series circuit of the diode D9, the resistor R35 and the resistor R37 is connected with the live line and the other end of the series circuit is connected with the ground;
an emitter of the triode Q4 is connected between the 7 th pin of the current detection chip U1 and the resistor R25 through a resistor R33, a base is grounded, a collector is connected between the resistor R32 and a diode D7, one end of the resistor R32 is connected between the collector of the triode Q7 and the resistor R38, the other end of the resistor R32 is connected with an anode of the diode D7, and a cathode of the diode D7 is connected with the 9 th pin of the single chip U3.
7. A leakage protection plug circuit according to claim 6, wherein: the transistor Q2, the transistor Q4, the transistor Q5, the transistor Q6 and the transistor Q7 are PNP transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022161853.7U CN213846225U (en) | 2020-09-27 | 2020-09-27 | Timing and temperature-fixing leakage protection plug circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022161853.7U CN213846225U (en) | 2020-09-27 | 2020-09-27 | Timing and temperature-fixing leakage protection plug circuit |
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| Publication Number | Publication Date |
|---|---|
| CN213846225U true CN213846225U (en) | 2021-07-30 |
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|---|---|---|---|
| CN202022161853.7U Active CN213846225U (en) | 2020-09-27 | 2020-09-27 | Timing and temperature-fixing leakage protection plug circuit |
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| CN (1) | CN213846225U (en) |
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