CN201601468U - A New Type Overvoltage Protector - Google Patents

Abstract

The utility model relates to a domestic appliance technical field refers in particular to a suitable domestic novel overvoltage protector. The overvoltage protector is provided with an insulating shell, an overvoltage protection circuit board is arranged in the overvoltage protector, and an overvoltage detector, an electronic switch, a relay, a delayer and a rectification power supply are arranged on the overvoltage protection circuit board; and the overvoltage protector also comprises an input plug connected with the input end of the overvoltage protection circuit board and an output jack connected with the output end of the overvoltage protection circuit board. After the structure of the oil-water separator is adopted, will during the use the utility model discloses overvoltage protector's input plug inserts alternating current socket, inserts domestic appliance's plug the utility model discloses an output jack can, consequently the utility model discloses it is very convenient to install and use, can implement multiple protections such as contact protection, the overvoltage protection in the use, the low-voltage protection in the use, the time delay protection after having a power failure to domestic appliance.

Description

A New Type Overvoltage Protector

Technical field:

The utility model relates to the technical field of protector equipment for household appliances, in particular to a novel overvoltage protector suitable for household use.

Background technique:

In household power grids, most of them are powered by a three-phase four-wire system. Often due to poor contact of the zero line of the distribution transformer, wrong connection between the zero line and the phase line, or accidental disconnection of the zero line, etc., the grid voltage is too high and thus Damage to household appliances; In addition, lightning strikes, surge voltage, etc. will also cause damage to household appliances. In order to avoid such damage, the overvoltage protection of household appliances is very important. Although most electronic and electrical products have such a protection design, they are not perfect or the protection is relatively single, and they cannot achieve the protective effect of the application. Although there are many similar electronic products on the market, most of the structural designs are relatively complicated and costly. High, not suitable for home use.

Utility model content:

The purpose of the utility model is to overcome the above-mentioned shortcomings of the existing products and provide a novel overvoltage protector with perfect functions and convenient use.

The technical solution adopted by the utility model to achieve its purpose is: a new type of overvoltage protector, the overvoltage protector has an insulating shell, and an overvoltage protection circuit board is arranged inside the overvoltage protection circuit board. voltage detector, electronic switch, relay, delayer and rectifier power supply; and the overvoltage protector also includes an input plug connected to the input end of the overvoltage protection circuit board and an output plug connected to the output end of the overvoltage protection circuit board hole.

The delayer is also connected with a reset switch, and the reset switch is arranged on the panel of the insulating shell.

There are three green, red and yellow LEDs connected to the overvoltage protection circuit board on the top of the insulating shell panel, wherein the green LED is connected between the relay and the output terminal, and the red LED is connected between the electronic switch and the relay. The yellow LED is connected between the delayer and the relay.

After adopting the above structure, when in use, insert the input plug of the overvoltage protector of the present utility model into the AC socket, and insert the plug of the household appliance into the output jack of the utility model, so the utility model is very convenient to install and use, and can be used for household The electrical appliance implements multiple protections such as contact protection, over-voltage protection during use, low-voltage protection during use, and time-delay protection after power failure.

Description of drawings:

Fig. 1 is a schematic diagram of the external structure of the utility model;

Fig. 2 is the circuit block diagram of the internal overvoltage protection circuit board of the present utility model;

Detailed ways:

Below in conjunction with specific embodiment and accompanying drawing, the utility model is further described.

As shown in Figures 1 and 2, the overvoltage protector of the utility model has an insulating shell 1, and an overvoltage protection circuit board 2 inside, and the overvoltage protection circuit board 2 is provided with an overvoltage detection device 21, electronic switch 22, relay 23, delayer 24 and rectifier power supply 25; The output terminal is connected to the output jack 12. The delayer 24 is also connected with a reset switch 241 , and the reset switch 241 is arranged on the panel of the insulating casing 1 .

The top of the panel of the insulating case 1 is respectively provided with three green, red and yellow LEDs 3, 4 and 5 connected to the overvoltage protection circuit board 2, wherein the green LED 3 is connected between the relay 23 and the output terminal 12, and the red LED 4 is connected to the output terminal 12. Between the electronic switch 22 and the relay 23 , the yellow LED 5 is connected between the delayer 24 and the relay 23 .

When in normal use, the green indicator light is on, and when an abnormal overvoltage occurs, the red indicator light is on when the overvoltage detector of the present invention detects an overvoltage, and at the same time the electronic switch releases the relay and cuts off the AC power, thereby effectively protecting the electrical appliances.

The working process of the utility model is as follows: when the power supply is just switched on, the yellow LED 5 on the panel of the insulating shell 1 is on, indicating that it is in a delayed working state. Or manually press the reset switch 241 to turn the green LED3 on, the yellow LED5 off, and the output terminal has a normal voltage output. When the AC (commercial power) voltage rises to 280V, the green LED3 is off and the red LED4 is on. At this time, there is no voltage output at the output terminal. When the AC voltage returns to the normal state below 265V, the red LED4 is off and the yellow LED5 is on. Same as power on. The utility model also has low-voltage protection. When the AC voltage is lower than 60V, the red LED4 is on, the green LED3 is off, and the output terminal has no voltage output. When the AC voltage recovers to above 70V, the red LED4 is off, and the yellow LED5 is on. The utility model is in the time-delay working state. Now, the reset switch 241 can be manually pressed or automatically delayed for three minutes to allow the yellow LED5 to go out and the green LED3 to be bright, and the output normal voltage is used for electrical appliances.

Concrete protection of the utility model is manifested in the following aspects:

1. Contact protection when the electrical appliance is just plugged in, because when the electrical appliance is just plugged in, the utility model is in a delay state, and there is no AC output in this state, and the voltage output will only be available after three minutes or after the reset switch is manually pressed, so It effectively avoids the damage to the electrical appliances caused by the sharp pulse during insertion;

2. Overvoltage protection in use. When the AC voltage is higher than 280V, the utility model will automatically cut off the AC power to protect electrical appliances from overvoltage damage. When the AC voltage returns to normal, the power supply will be restored automatically or manually after three minutes. ;

3. Low-voltage protection in use. When the AC voltage is lower than 70V, the utility model will automatically cut off the AC power to protect electrical appliances from low-voltage damage. When the AC voltage returns to normal, the process is the same as the above 2;

4. The protection of power-on after power-off, when power-off and power-on again, the utility model will output AC voltage after a delay of three minutes, which has a good protective effect on air conditioners, refrigerators and other electrical appliances with air compressors, because Powering on the air compressor immediately after power failure will have a great impact on service life and performance.

Of course, the above descriptions are only preferred embodiments of the present utility model, and are not used to limit the protection scope of the present utility model. All equivalent modifications or changes are made according to the structural principles of the present utility model, such as input plugs, output jacks Changes in number and position, color changes of LED lamps or light emission by other indicator lights, etc., should be included in the scope of protection of the present utility model.

Claims (3)

1. A novel overvoltage protector, characterized in that: the overvoltage protector has an insulating shell (1), and an overvoltage protection circuit board (2) is arranged inside it, and on the overvoltage protection circuit board (2) An overvoltage detector (21), an electronic switch (22), a relay (23), a delayer (24) and a rectified power supply (25) are provided; and the overvoltage protector also includes an overvoltage protection circuit board ( 2) The input plug (11) connected to the input terminal and the output jack (12) connected to the output terminal of the overvoltage protection circuit board (2). 2. A new type of overvoltage protector according to claim 1, characterized in that: the delayer (24) is also connected to a reset switch (241), and the reset switch (241) is arranged in an insulating shell (1) On the panel. 3. A new type of overvoltage protector according to claim 1, characterized in that: green, red, and yellow switches connected to the overvoltage protection circuit board (2) are respectively provided above the panel of the insulating case (1). Three LEDs (3, 4, 5), wherein the green LED (3) is connected between the relay (23) and the output terminal (12), and the red LED (4) is connected between the electronic switch (22) and the relay (23) Between, yellow LED (5) is connected between delayer (24) and relay (23).

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