CN210426926U

CN210426926U - Alternating current water leakage detection circuit and alternating current socket

Info

Publication number: CN210426926U
Application number: CN201921807242.6U
Authority: CN
Inventors: 管彩灵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-04-28
Anticipated expiration: 2029-10-25

Abstract

The utility model provides an alternating current detection circuitry and alternating current socket that leaks. Alternating current detection circuitry that leaks includes: the water leakage protection device comprises a single chip microcomputer, a first water leakage probe pin, a second water leakage probe pin, an isolation circuit and a normally closed relay, wherein an interruption pin of the single chip microcomputer is connected with the first water leakage probe pin and the second water leakage probe pin through the isolation circuit, a first output pin of the single chip microcomputer is connected with a control coil of the relay through a driving circuit, and a working end of the relay is connected with an alternating current terminal. The utility model discloses an isolating circuit has played and has prevented that the high-voltage forceful electric power that takes in the aquatic from directly getting into the singlechip pin, damages the problem of singlechip, makes the utility model discloses both can be applied to uncharged detection of leaking, also can be applied to electrified in the detection of leaking.

Description

Alternating current water leakage detection circuit and alternating current socket

Technical Field

The utility model relates to a detection area leaks, in particular to alternating current detection circuitry and alternating current socket that leaks.

Background

The conventional leakage detecting device is damaged by high voltage under the action of high voltage strong electricity carried by water when the conventional leakage detecting device in the prior art directly detects the leakage.

SUMMERY OF THE UTILITY MODEL

The utility model provides an alternating current detection circuitry and alternating current socket that leaks to solve at least one above-mentioned technical problem.

In order to solve the above problem, as an aspect of the present invention, there is provided an ac water leakage detection circuit, including: the water leakage protection device comprises a single chip microcomputer, a first water leakage probe pin, a second water leakage probe pin, an isolation circuit and a normally closed relay, wherein an interruption pin of the single chip microcomputer is connected with the first water leakage probe pin and the second water leakage probe pin through the isolation circuit, a first output pin of the single chip microcomputer is connected with a control coil of the relay through a driving circuit, and a working end of the relay is connected with an alternating current terminal.

Preferably, the isolation circuit includes a first diode, a second diode, a first triode, a capacitor, and a first resistor, the interrupt pin is connected with the anode of the first diode, the cathode of the first diode is connected with the first water leakage probe pin, the cathode of the first diode is connected with the cathode of the second diode, the anode of the second diode is grounded through the first resistor, the second water leakage probe pin is connected with the anode of the second diode, the cathode of the first diode is connected with the base of the first triode through the capacitor, the collector of the first triode is connected with the interrupt pin, and the emitter of the first triode is grounded.

Preferably, the driving circuit is a second triode.

Preferably, the first output pin is connected with a base of the second triode, one end of a control coil of the relay is connected with a direct-current power supply, and the other end of the control coil of the relay is connected with a collector of the second triode.

Preferably, the alternating current water leakage detection circuit further comprises an alarm, and a second output pin of the single chip microcomputer is connected with the alarm.

Preferably, the alarm is a buzzer.

Preferably, a second output pin of the single chip microcomputer is connected with the alarm through a third triode.

Preferably, the cathode of the second diode is connected to the first water leakage probe pin through a second resistor, and the anode of the second diode is connected to the second water leakage probe pin through a third resistor.

The utility model also provides an AC socket, including the probe and the foretell alternating current that leak the detection circuitry that leaks of leaking, the probe that leaks with alternating current leaks the detection circuitry's first probe pin that leaks, second and leak the probe pin and connect.

In the technical scheme, the utility model discloses an isolation circuit has played and has prevented that the high-voltage forceful electric power that takes in the aquatic from directly getting into the singlechip pin, damages the problem of singlechip, makes the utility model discloses both can be applied to uncharged detection of leaking, also can be applied to among the electrified detection of leaking.

Drawings

Fig. 1 schematically shows a schematic diagram of a single chip module of the present invention;

FIG. 2 schematically illustrates a schematic diagram of a probe input module;

FIG. 3 schematically illustrates a schematic diagram of an alarm module;

fig. 4 schematically shows a schematic diagram of a relay control module.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

The utility model discloses an aspect provides an alternating current detection circuitry that leaks, include: the water leakage protection device comprises a single chip microcomputer U1, a first water leakage probe pin TZ1, a second water leakage probe pin TZ2, an isolation circuit and a normally closed relay, wherein an interruption pin of the single chip microcomputer U1 is connected with a first water leakage probe pin TZ1 and a second water leakage probe pin TZ2 through the isolation circuit, a first output pin of the single chip microcomputer U1 is connected with a control coil of the relay through a driving circuit, and the working end of the relay is connected with an alternating current terminal. In fig. 1 to 4, the same circuit networks are denoted by the same network reference numerals, which belongs to the common general knowledge in the field of circuit schematic diagram drawing, and indicate that the networks are connected with each other, and the description thereof is omitted. The specific type of the singlechip U1 is not limited, and any conventional singlechip in the field can be adopted.

During operation, the probe is connected with first probe pin TZ1 that leaks, second probe pin TZ2 that leaks, when leaking, forms the short circuit to make singlechip U1's interruption pin ground connection become the low level, in order to trigger the singlechip to export the high level to first output pin, thereby make the relay outage, the alternating current circuit of disconnection external connection to the relay plays the guard action. IN a preferred embodiment, the neutral line N _ IN is connected to the neutral line N _ OUT via a first relay K1, and the live line L _ IN is connected to the live line L _ OUT via a second relay K2.

Preferably, the isolation circuit includes a first diode D1, a second diode D2, a first triode Q7, a capacitor C10, and a first resistor R20, the interruption pin is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the first water leakage probe pin TZ1, the cathode of the first diode D1 is connected to the cathode of the second diode D2, the anode of the second diode D2 is grounded via the first resistor R20, the second water leakage probe pin TZ2 is connected to the anode of the second diode D2, the cathode of the first diode D1 is connected to the base of the first triode Q7 via the capacitor C10, the collector of the first triode Q7 is connected to the interruption pin, and the emitter of the first triode Q7 is grounded. When any one or two of the first water leakage probe pin TZ1 and the second water leakage probe pin TZ2 detects water with alternating current, the alternating current in the water acts on the base electrode of the first triode Q7 through the capacitor C10, so that the first triode Q7 is conducted, a low level is generated at the interrupt pin to trigger the single chip microcomputer to interrupt, and a corresponding circuit is disconnected, so that a protection effect is achieved. Meanwhile, the first diode D1 can avoid the problem that the high voltage generated by water flows to the interrupt pin of the singlechip, so that the digital circuit is damaged by the high voltage. The second diode D2 itself generates a voltage drop to avoid current backflow that could damage the single chip.

Preferably, a cathode of the second diode D2 is connected to the first water leakage probe pin TZ1 through a second resistor R22, and an anode of the second diode D2 is connected to the second water leakage probe pin TZ2 through a third resistor R21.

Preferably, the driving circuit is a second transistor Q1. Preferably, the first output pin is connected to a base of the second transistor Q1, one end of a control coil of the relay is connected to a dc power supply, and the other end of the control coil of the relay is connected to a collector of the second transistor Q1. When the DETA signal is high, the second transistor Q1 is turned on, thereby controlling the relay to be powered off.

Preferably, the alternating current water leakage detection circuit further comprises an alarm BZ, and a second output pin of the single chip microcomputer U1 is connected with the alarm BZ. Preferably, the alarm BZ is a buzzer. When the water leakage short circuit occurs, the second output pin of the singlechip U1 is triggered to output high level, so that the buzzer gives an alarm.

Preferably, a second output pin of the single chip microcomputer U1 is connected to the alarm BZ through a third triode Q2.

The utility model also provides an alternating current socket, including the probe and the foretell alternating current that leak the detection circuitry that leaks of leaking, the probe that leaks with alternating current leaks the detection circuitry's first probe pin TZ1 that leaks, second and leak probe pin TZ2 and connect.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An alternating current water leakage detection circuit, comprising: the water leakage protection device comprises a single chip microcomputer (U1), a first water leakage probe pin (TZ1), a second water leakage probe pin (TZ2), an isolation circuit and a normally closed relay, wherein an interruption pin of the single chip microcomputer (U1) is connected with the first water leakage probe pin (TZ1) and the second water leakage probe pin (TZ2) through the isolation circuit, a first output pin of the single chip microcomputer (U1) is connected with a control coil of the relay through a driving circuit, and a working end of the relay is connected with an alternating current terminal.

2. The AC water leakage detection circuit according to claim 1, wherein said isolation circuit comprises a first diode (D1), a second diode (D2), a first triode (Q7), a capacitor (C10), and a first resistor (R20), said interrupt pin is connected with the anode of said first diode (D1), the cathode of said first diode (D1) is connected with said first water leakage probe pin (TZ1), the cathode of said first diode (D1) is connected with the cathode of said second diode (D2), the anode of said second diode (D2) is grounded through said first resistor (R20), said second water leakage probe pin (TZ2) is connected with the anode of said second diode (D2), the cathode of said first diode (D1) is connected with the base of said first triode (Q7) through said capacitor (C10), the collector of the first transistor (Q7) is connected to the interrupt pin and the emitter of the first transistor (Q7) is grounded.

3. An ac leakage detection circuit according to claim 1, wherein said driving circuit is a second transistor (Q1).

4. An AC leakage detection circuit according to claim 3, wherein said first output pin is connected to the base of said second transistor (Q1), one end of the control coil of said relay is connected to the DC power supply, and the other end is connected to the collector of said second transistor (Q1).

5. The alternating current water leakage detection circuit according to claim 1, further comprising an alarm (BZ), wherein a second output pin of the single chip microcomputer (U1) is connected with the alarm (BZ).

6. An alternating current water leakage detection circuit according to claim 5, characterized in that said alarm (BZ) is a buzzer.

7. An alternating current water leakage detection circuit according to claim 5, characterized in that the second output pin of the single chip microcomputer (U1) is connected with the alarm (BZ) through a third triode (Q2).

8. An ac leakage detection circuit according to claim 2, wherein the cathode of the second diode (D2) is connected to the first leakage probe pin (TZ1) through a second resistor (R22), and the anode of the second diode (D2) is connected to the second leakage probe pin (TZ2) through a third resistor (R21).

9. An ac outlet comprising a water leakage probe and the ac water leakage detection circuit of any one of claims 1 to 8, wherein the water leakage probe is connected to a first water leakage probe pin (TZ1) and a second water leakage probe pin (TZ2) of the ac water leakage detection circuit.