CN219801879U - Circuit capable of switching off when meeting water - Google Patents

Abstract

The utility model belongs to the technical field of leakage protection, and discloses a water-meeting power-off circuit which comprises a power supply module, a wading sensor, a relay and a logic module, wherein the wading sensor is connected with the power supply module; the output end of the power supply module is respectively connected with the power input end of the wading sensor and the power input end of the relay, the WHILE of the wading sensor is connected with the R2 end of the logic module, the control end of the relay is connected with the Q1 end of the logic module, and the relay is connected with the power output module; and outputting a signal to a logic module after the wading sensor wades, wherein the logic module controls the relay to disconnect an output power supply. The water-contacting power-off circuit provided by the utility model can judge whether the electric equipment has a water-soaking short circuit or not in advance, and timely disconnect the power supply, and the power supply is disconnected only when the equipment does not need to be soaked, and the short circuit generates a large current.

Description

Circuit capable of switching off when meeting water

Technical Field

The utility model belongs to the technical field of leakage protection, and particularly relates to a water-contacting power-off circuit.

Background

At present, most power-off protection circuits in the market adopt a mode of adding fuses in the circuits, the break-point time of the circuits is limited by the parameter performance of the fuses, the influence of the environment is larger, the power-off performance is greatly reduced under some more severe use scenes, the power-off protection circuits are passive, the power supply can be disconnected only when the current needs to reach a certain degree, the power supply cannot be disconnected in advance, and the power-off protection circuits have certain hidden danger for safety.

Disclosure of Invention

The present utility model aims to solve the above technical problems at least to some extent. Therefore, the utility model aims to provide a water-contacting power-off circuit.

The technical scheme adopted by the utility model is as follows:

a water-meeting power-off circuit comprises a power supply module, a wading sensor, a relay and a logic module; the output end of the power supply module is respectively connected with the power input end of the wading sensor and the power input end of the relay, the WHILE of the wading sensor is connected with the R2 end of the logic module, the control end of the relay is connected with the Q1 end of the logic module, and the relay is connected with the power output module; and outputting a signal to a logic module after the wading sensor wades, wherein the logic module controls the relay to disconnect an output power supply.

Preferably, the logic module includes a field effect transistor Q1 and a resistor R2, and a capacitor C1 and a resistor R1 are disposed on a connection circuit between the field effect transistor Q1 and the resistor R2.

Preferably, the logic module, the relay and the power output module are sequentially connected and provided with multiple paths.

The beneficial effects of the utility model are as follows:

the water-contacting power-off circuit provided by the utility model can judge whether the electric equipment has a water-soaking short circuit or not in advance, and timely disconnect the power supply, and the power supply is disconnected only when the equipment does not need to be soaked, and the short circuit generates a large current.

The water-meeting power-off circuit has good ESD protection, and can still normally power off even if being interfered by external signals; the water-meeting power-off circuit belongs to a logic control circuit, the control effect depends on the circuit, and the influence of the environment is small.

Drawings

FIG. 1 is a schematic diagram of a water-powered down circuit of the present utility model.

Fig. 2 is a schematic diagram of a power supply module of the present utility model.

FIG. 3 is a schematic diagram of a wading sensor of the present utility model.

Fig. 4 is a schematic diagram of one of the logic modules, relays, and power output modules of the present utility model.

Fig. 5 is a schematic diagram of another logic module, relay and power output module of the present utility model.

Fig. 6 is a schematic diagram of another logic module, relay and power output module of the present utility model.

Detailed Description

The utility model will be further illustrated with reference to specific examples. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

As shown in fig. 1 to 4, a water-meeting power-off circuit of the present embodiment includes a power supply module, a wading sensor, a power output module, a relay and a logic module. The output end of the power supply module is respectively connected with the power input end of the wading sensor and the power input end of the relay, the WHILE of the wading sensor is connected with the R2 end of the logic module, the control end of the relay is connected with the Q1 end of the logic module, the relay is connected with the power output module, and the power output module is connected with electric equipment; when the wading sensor wades, an output signal is given to the logic module, and after the logic module judges, the relay is controlled to cut off an output power supply, and the power supply output module stops outputting. When the wading sensor is not immersed in water, the power supply is normally output through the power supply output module. The water-contacting power-off circuit can judge whether the electric equipment has a water-soaking short circuit or not in advance, and timely disconnect the power supply, so that the equipment does not need to be soaked, and the short circuit generates a large current to disconnect.

As shown in fig. 4, the logic module includes a field effect transistor Q1 and a resistor R2, and a capacitor C1 and a resistor R1 are disposed on a connection circuit between the field effect transistor Q1 and the resistor R2.

As shown in fig. 4, 5 and 6, the logic module, the relay and the power output module are sequentially connected and are provided with multiple paths, each path protects one electric device, in this embodiment, the logic module, the relay and the power output module are provided with three paths, so that three electric devices can be protected at one time, and the power-off speed is high.

The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.

Claims (3)

1. The utility model provides a meet water outage circuit which characterized in that: the device comprises a power supply module, a wading sensor, a relay and a logic module; the output end of the power supply module is respectively connected with the power input end of the wading sensor and the power input end of the relay, the WHILE of the wading sensor is connected with the R2 end of the logic module, the control end of the relay is connected with the Q1 end of the logic module, and the relay is connected with the power output module.

2. The water-break circuit of claim 1, wherein: the logic module comprises a field effect tube Q1 and a resistor R2, and a capacitor C1 and a resistor R1 are arranged on a connecting circuit between the field effect tube Q1 and the resistor R2.

3. The water-break circuit of claim 1, wherein: the logic module, the relay and the power output module are sequentially connected and are provided with multiple paths.