TWM651310U - Home type power automatic switch - Google Patents

Abstract

A household automatic power switching switch has a casing, and a first circuit board and a second circuit board arranged in the casing and electrically connected to each other. A switching device is provided on the first circuit board, and the switching device includes a A first relay, a second relay, a first control unit and a second control unit. When the mains power is supplied normally, the mains current passes through the first control unit to keep the second relay open, so that the first relay supplies mains power. ; When the mains power supply is interrupted, the backup power flows through the second control unit and controls the second relay to act, so that the second relay controls the first relay to switch to the supply of backup power, and the second circuit board is provided with a plurality of operation indicator lights , each action indicator light is exposed on the outer peripheral surface of the upper cover, and the working status of the power supply side and load side of the switching device can be displayed in real time through each action indicator light.

Description

Household automatic power transfer switch

This invention relates to a household automatic power supply switch, and particularly refers to an automatic switch that can switch to another backup power supply when the mains power supply is interrupted.

Modern society, from small households to large industrial plants, requires electricity all the time. However, once the largest source of power supply (i.e., mains power) is interrupted, it will cause inconvenience in life and even economic losses. Therefore, backup power supply must be prepared in advance. To cope with emergency situations of power outage. The mains power supply and the backup power supply are switched by a power switch. The commonly used power switch is mechanical. Specifically, it uses a combination of a switching handle and a fuseless switch to pull the handle after the mains power is interrupted. And switch the power supply to the backup power supply.

The disadvantages of the above-mentioned conventional devices are that they are large in size and require other circuit configurations, resulting in excessive space occupied and inconvenience in configuration and installation.

In view of this, how to improve the above problems is the primary issue that this creation aims to solve.

The main purpose of this invention is to provide a household automatic power switching switch that can be commonly used in the installation of electrical boxes on the market. The switching device uses two relays to control the switching between power supplies, and uses two control circuit units to control the action of the relays. , to reduce the space occupied by components.

In order to achieve the aforementioned purpose, this invention provides a household automatic power switching switch, which includes:

A shell is composed of a base and an upper cover butted to each other, and a receiving space is formed inside the shell;

A first circuit board is provided on the base and located in the accommodation space. The first circuit board is provided with a first socket and a switching device. The switching device includes a first relay, a second relay, a first A control unit and a second control unit, wherein the first relay is used to connect to external load equipment, and the first relay is switchably conductive to the mains or a backup power supply, and the second relay is electrically connected to the third A relay is electrically connected to the first control unit and the second control unit, wherein the first control unit and the second control unit are respectively connected to the mains power and the backup power supply; when the mains power is supplied normally, the mains current passes through The first control unit keeps the second relay open circuit so that the first relay supplies mains power; when the mains supply is interrupted, the backup power flows through the second control unit and simultaneously controls the second relay to act, causing the second relay to control the first relay to switch to the supply of backup power; and

A second circuit board is provided on the upper cover and is located in the accommodation space. The second circuit board is provided with a second socket and a plurality of operation indicator lights. Each of the operation indicator lights is respectively exposed on the outer peripheral surface of the upper cover, And the second circuit board uses a wire to connect the first socket and the second socket at the same time, so that the second circuit board and the first circuit board are electrically connected to each other, and the action indicator lights are used to instantly display the Switch the working status of the power side and load side of the device.

The above-mentioned purposes and advantages of the present invention can be easily understood from the detailed description and drawings of the selected embodiments below.

Please refer to Figures 1 to 4, which show a household automatic power transfer switch provided by this invention, which is mainly composed of a housing 1, a first circuit board 2 and a second circuit board 3. in:

The housing 1 is composed of a base 11 and an upper cover 12 butting together, and an accommodating space 13 is formed inside the housing 1 .

The first circuit board 2 is provided on the base 11 and located in the accommodating space 13. The first circuit board 2 is provided with a first socket 21 and a switching device 22. The switching device 22 includes a first relay 23 , a second relay 24, a first control unit 25 and a second control unit 26, wherein the first relay 23 is used to connect to external load equipment, and the first relay 23 can be switched to the mains or a backup power supply, and the second relay 24 is electrically connected to the first relay 23, and is further electrically connected to the first control unit 25 and the second control unit 26, wherein the first control unit 25 and the second control unit 26 are respectively connected to the mains power and the backup power supply; when the mains power is supplied normally, the mains current passes through the first control unit 25 to keep the second relay 24 open, so that the first relay 23 supplies mains power; when the mains power supply is interrupted At this time, the backup power flows through the second control unit 26 and simultaneously controls the second relay 24 to act, so that the second relay 24 controls the first relay 23 to switch to the supply of backup power. Furthermore, the first control unit 25 and the second control unit 26 are respectively provided with a voltage drop circuit 27, whereby the voltage of the mains or backup power supply can be reduced to 6.8 volts and then input into the first control unit 25 respectively. or the second control unit 26 .

The second circuit board 3 is provided on the upper cover 12 and located in the accommodation space 13. The second circuit board 3 is provided with a second socket 31 and a plurality of operation indicator lights 32. Each of the operation indicator lights 32 is exposed respectively. On the outer peripheral surface of the upper cover 12, the second circuit board 3 is connected to the first socket 21 and the second socket 31 at the same time with a wire 33, so that the second circuit board 3 and the first circuit board 2 are mutually connected. Electrically connected, and the operating status of the power side and the load side of the switching device 22 is instantly displayed through each operation indicator light 32; in addition, an overload protection device 28 is further provided on the first circuit board 2 to protect the load equipment. , and the overload protection device 28 has an overload indication button 281. The overload indication button 281 protrudes outward through the accommodation space 13 and is exposed on the outer peripheral surface of the upper cover 12 to facilitate user operation. Furthermore, the second circuit board 3 is further provided with a start switch 34 exposed on the outer peripheral surface of the upper cover 12. The start switch 34 is used to control whether the mains power and the backup power supply in the switching device 22 are automatically switched or Manual switching.

When this invention is actually used, when the mains power is supplied normally and the mains current passes through the first control unit 25, the second relay 24 will continue to remain open, so that the first relay 23 will continue to supply mains power. In practical applications, the first control unit 25 and the second control unit 26 are composed of a combination of optical coupling elements and oscillators, so that the first control unit 25 and the second control unit can be controlled by this technology. When the unit 26 is switched, when the first control unit 25 has mains power passing through it and is in an operating state, the second control unit 26 is controlled by it and does not act, so that the first relay 23 remains the supply of mains power. lines.

On the contrary, when the supply of mains power is interrupted, the first control unit 25 stops operating because no current flows. At this time, the backup power will flow through the second control unit 26 and generate a signal to control the second relay 24. The second relay 24 then controls the first relay 23 to switch to the supply line of the backup power to maintain the load. Power supply to the device.

Furthermore, this invention can also further provide a delayed power supply function, which only needs to be provided with an adjustable resistor (not shown in the figure) on the power input side of the first control unit 25 and the second control unit 26 respectively. , whereby when the mains power is generated or restored, the second relay 24 can be delayed for a period of time before switching, and the length of time can be adjusted by an adjustable resistor.

The advantage of this invention is that the above structure is entirely composed of electronic components and circuit design, instead of using mechanical components, thereby reducing the size of the switch; and further reducing the complexity of the relevant wiring connected to the switch, and also It helps to reduce the space occupied by the overall power box. In addition to being easy to assemble, the operation indicator light 32, the start switch 34 and the overload indication button 281 exposed on the upper cover 12 are not only convenient for the user to operate, but also can be easily operated by the user. Keep the appearance beautiful.

However, the disclosure of the above embodiments is only for illustrating the present invention and is not intended to limit the present invention. All substitutions of equivalent components shall still fall within the scope of the present invention.

To sum up, those skilled in the art can understand that this invention can indeed achieve the aforementioned purpose and is in compliance with the provisions of the Patent Law, so the application can be filed in accordance with the law.

1: Shell 11: Base 12: Upper cover 13: Accommodation space 2: First circuit board 21:First socket 22:Switching device 23:First relay 24:Second relay 25:First control unit 26: Second control unit 27:Voltage drop circuit 28: Overload protection device 281: Overload indication button 3: Second circuit board 31:Second socket 32: Action indicator light 33:Wire 34: Start switch

Picture 1 is an exploded view of this creation. Figure 2 is a schematic diagram of the connection between the first circuit board and the second circuit board of this creation. Figure 3 is a schematic diagram of the structural block of this creation. Figure 4 is a schematic diagram of the three-dimensional appearance of this creation after assembly.

1: Shell

11: Base

12: Upper cover

13: Accommodation space

2: First circuit board

21:First socket

22:Switching device

28: Overload protection device

281: Overload indication button

3: Second circuit board

31:Second socket

32: Action indicator light

33:Wire

34: Start switch

Claims (5)

A household automatic power switch, including: A shell is composed of a base and an upper cover butted to each other, and a receiving space is formed inside the shell; A first circuit board is provided on the base and located in the accommodation space. The first circuit board is provided with a first socket and a switching device. The switching device includes a first relay, a second relay, a first A control unit and a second control unit, wherein the first relay is used to connect to external load equipment, and the first relay is switchably conductive to the mains or a backup power supply, and the second relay is electrically connected to the third A relay is electrically connected to the first control unit and the second control unit, wherein the first control unit and the second control unit are respectively connected to the mains power and the backup power supply; when the mains power is supplied normally, the mains current passes through The first control unit keeps the second relay open circuit so that the first relay supplies mains power; when the mains supply is interrupted, the backup power flows through the second control unit and simultaneously controls the second relay to act, causing the second relay to control the first relay to switch to the supply of backup power; A second circuit board is provided on the upper cover and is located in the accommodation space. The second circuit board is provided with a second socket and a plurality of operation indicator lights. Each of the operation indicator lights is respectively exposed on the outer peripheral surface of the upper cover, And the second circuit board uses a wire to connect the first socket and the second socket at the same time, so that the second circuit board and the first circuit board are electrically connected to each other, and the action indicator lights are used to instantly display the Switch the working status of the power side and load side of the device. The household automatic power transfer switch according to claim 1, wherein the first control unit and the second control unit further include a voltage drop circuit. As claimed in claim 1, the household automatic power supply switch, wherein the second circuit board is further provided with a start switch exposed on the outer peripheral surface of the upper cover. The start switch is used to control the mains power and the power supply in the switching device. Whether the backup power supply switches automatically or manually. The household automatic power transfer switch as described in claim 1, wherein an adjustable resistor is electrically connected to the power input side of the first control unit and the second control unit respectively, so that it can be controlled by the adjustable resistor. The second relay acts with or without delay. The household automatic power switch as claimed in claim 1, wherein the first circuit board is further provided with an overload protection device, the overload protection device has an overload indication button, and the overload indication button is connected through the accommodation space. It protrudes outward and is exposed on the outer peripheral surface of the upper cover.

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