Radiation-free power adapter with phase conversion

Abstract

The invention discloses a non-radiative power adapter with phase conversion. The non-radiative power adapter is composed of a switching power supply circuit (1), a radiation detection circuit (2), a radiation elimination conversion circuit (3) and a plastic shell (4). When a hand touches the touch piece CMP, if the light-emitting indicating lamp ND emits light, the switch K needs to be switched to another position, and only when the touch piece CMP is touched, the light-emitting indicating lamp ND does not emit light, the electromagnetic radiation in the direct-current output power line DC of the switching power supply circuit (1) can be eliminated, so that the supplied electrical equipment has no electromagnetic radiation.

Description

Technical Field

[0001] The invention relates to a power conversion circuit of a power adapter, in particular to a radiation-free power adapter with phase conversion. Background Art

[0002] Practice has proved that all small appliances such as desk lamps and mobile phones that are powered by power adapters have electromagnetic radiation. The electromagnetic radiation of these small appliances comes from the power adapter. In order to eliminate the electromagnetic radiation of the power adapter, I have applied for and obtained the "Automatic Radiation Elimination Device for a Power Adapter" 202120893783.6 patent. This patent uses the power neutral wire to eliminate the electromagnetic radiation of the power adapter. However, the neutral wire and the live wire of the AC power supply cannot be distinguished without tool detection. In order to distinguish the neutral wire and the live wire, this patent adopts the principle of an electric tester. When the touch sheet is touched, if the neon light is on, it proves that the connected wire is the live wire of the power supply. At this time, the input power phase must be reversed to change the position of the neutral wire and the live wire. Although this method is feasible, it is very troublesome.

[0003] Note: Using the authorized patented technology "An automatic radiation elimination device for a power adapter" with the patent number: 202120893783.6, we have produced radiation-free power adapter products and have put them on the market. The effect of eliminating electromagnetic radiation has passed the test of Shenzhen Yuancetong Testing Technology Co., Ltd. The test report number is YCT-E20200525001, and the electromagnetic radiation elimination rate is 99.5%. The power adapter we produce has passed the national 3C certification, number 2020010907304228. Summary of the invention

[0004] In order to solve the problem of needing to switch the positions of the neutral wire and the live wire at the power input end to select the neutral wire and the live wire, the technical solution provided by the present invention is to use a power switching switch to replace the manual switching of the neutral wire and the live wire at the power input end to select the neutral wire and the live wire, and then use the principle of the electric tester to easily find the neutral wire of the power supply. According to the above principle, the present invention provides a radiation-free power adapter with a switching switch. Using this technical solution is not only simple in method and low in cost, but also can effectively select the neutral wire of the power supply through the device to eliminate electromagnetic radiation.

[0005] A radiation-free power adapter with phase conversion, composed of a switching power supply circuit, a radiation detection circuit, a radiation elimination conversion circuit and a plastic shell, wherein the switching power supply circuit, the radiation detection circuit and the radiation elimination conversion circuit are installed in the plastic shell, the radiation elimination conversion circuit includes a switch, a capacitor C1 and a capacitor C2, the radiation detection circuit includes a capacitor C3, a neon lamp and a touch sheet, and is characterized in that: the A1 and A2 lines at the input end of the switching power supply circuit are connected to an AC 220V power supply, the positive and negative poles at the output end of the switching power supply circuit are DC output power supplies, the 1 foot of the switch in the radiation elimination conversion circuit is electrically connected to one end of the capacitor C1, the other end of the capacitor C1 is electrically connected to the A2 line of the AC input power line, the 3 foot of the switch in the radiation elimination conversion circuit is electrically connected to one end of the capacitor C2, the other end of the capacitor C2 is electrically connected to the A1 line of the AC input power line, the 2 foot of the switch in the radiation elimination conversion circuit is electrically connected to one end of the capacitor C3 and one end of the neon lamp in the radiation detection circuit, the other end of the capacitor C3 is electrically connected to the negative pole of the DC output power line of the switching power supply circuit, and the other end of the neon lamp is electrically connected to the touch sheet.

[0006] The principle of the present invention is described as follows: the switching power supply circuit in the power adapter of the prior art will generate electromagnetic radiation of a certain frequency when working, and the radiation can be transmitted to the powered product through the output DC power line, causing the product to generate electromagnetic radiation. The present invention couples the electromagnetic radiation in the DC power line to the power neutral line through the capacitor C3 for elimination. In order to correctly select the power neutral line, the device adds a radiation detection circuit and a radiation elimination conversion circuit.

[0007] When you touch the touch piece on the plastic shell with your hand, if the neon lamp on the radiation detection circuit lights up, it proves that pin 2 of the switch in the radiation elimination conversion circuit is connected to the live wire of the power supply. You need to switch the switch to another position to connect the neutral wire of the power supply to eliminate the electromagnetic radiation in the DC output power line, thereby eliminating the electromagnetic radiation of the powered appliance.

[0008] The radiation detection circuit is provided with a through hole at the position of the plastic shell corresponding to the neon lamp to observe whether the neon lamp is emitting light.

[0009] The touch sheet in the radiation detection circuit is made of conductive metal material and is mounted on the outer surface of the plastic shell for touch.

[0010] The switching power supply circuit is a universal switching power supply circuit device which inputs 220V alternating current power supply AC and outputs direct current power supply DC.

[0011] The switch in the radiation elimination conversion circuit is a universal double-throw switch with a withstand voltage greater than 250V. The toggle handle of the switch is exposed from the outer surface of the plastic shell for toggling.

[0012] The beneficial effects of the present invention are as follows: utilizing the technical solution is not only simple in method and low in cost, but can also effectively solve the problem of switching between the neutral line and the live line of the power adapter, and conveniently solve the problem of electromagnetic radiation of the output power of the power adapter. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a schematic diagram of the principle of the present invention.

[0015] Figure 2 It is a schematic diagram of the structure of an embodiment of the present invention.

[0016] Markings in the figure: 1. Switching power supply circuit, 2. Radiation detection circuit, 3. Radiation elimination conversion circuit, 4. Plastic shell, neon lamp ND, touch piece CMP, AC power supply AC, DC power supply DC, positive pole +, negative pole -, switch K, capacitor C1, C2, C3, A1, A2, SR, SC, 220V, 1, 2, 3. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the principle schematic diagram and structural schematic diagram in the accompanying drawings: The accompanying drawing is a schematic diagram of a radiation-free power adapter with phase conversion, which mainly includes: a switching power supply circuit 1, a radiation detection circuit 2, a radiation elimination conversion circuit 3 and a plastic shell 4, wherein the switching power supply circuit 1, the radiation detection circuit 2, and the radiation elimination conversion circuit 3 are installed in the plastic shell 4, the radiation detection circuit 2 includes a capacitor C3, a neon lamp ND and a touch sheet CMP, and the radiation elimination conversion circuit 3 includes a switch K, a capacitor C1 and a capacitor C2, and is characterized in that: the A1 and A2 lines of the input terminal SR of the switching power supply circuit 1 are connected to an AC 220V power supply, and the positive electrode + and the negative electrode - of the output terminal SC of the switching power supply circuit 1 are direct DC output power, pin 1 of switch K in the radiation elimination conversion circuit 3 is electrically connected to one end of capacitor C1, the other end of capacitor C1 is electrically connected to line A2 of the AC input power line, pin 3 of switch K in the radiation elimination conversion circuit 3 is electrically connected to one end of capacitor C2, the other end of capacitor C2 is electrically connected to line A1 of the AC input power line, pin 2 of switch K in the radiation elimination conversion circuit 3 is electrically connected to one end of capacitor C3 and one end of neon lamp ND in the radiation detection circuit 2, the other end of capacitor C3 is electrically connected to the negative pole - of the DC output power line of the switching power supply circuit 1, and the other end of the neon lamp ND is electrically connected to the touch sheet CMP.

[0018] When you touch the touch piece CMP on the plastic shell 4 with your hand, if the neon lamp ND on the radiation detection circuit 2 lights up, it proves that the 2nd foot of the switch K in the radiation elimination conversion circuit 3 is connected to the live wire of the power supply. Then you need to switch the switch K in the radiation elimination conversion circuit 3 to another position so that the 2nd foot of the switch K is connected to the 3rd foot. At this time, the electromagnetic radiation in the DC output power line can be eliminated, and the electromagnetic radiation of the powered appliance is also eliminated.

[0019] The radiation detection circuit 2 is provided with a through hole at the position of the plastic housing 4 corresponding to the neon lamp ND, so as to observe whether the neon lamp ND is emitting light.

[0020] The touch pad CMP of the radiation detection circuit 2 is made of conductive metal material and is mounted on the outer surface of the plastic housing 4 for touch.

[0021] The switching power supply circuit 1 is a universal switching power supply circuit device which inputs a 220V alternating current power supply AC and outputs a direct current power supply DC.

[0022] The switch K in the radiation elimination conversion circuit 3 is a universal double-throw switch with a withstand voltage greater than 250V. The toggle handle of the switch K is exposed from the outer surface of the plastic housing 4 for toggling.

[0023] The beneficial effects of the present invention are as follows: utilizing the technical solution is not only simple in method and low in cost, but can also effectively solve the problem of switching between the neutral line and the live line of the power adapter, and conveniently solve the problem of electromagnetic radiation of the output power of the power adapter.

Claims

1. A radiation-free power adapter with phase conversion, comprising a switching power supply circuit (1), a radiation detection circuit (2), a radiation elimination conversion circuit (3) and a plastic housing (4), wherein the switching power supply circuit (1), the radiation detection circuit (2) and the radiation elimination conversion circuit (3) are installed in the plastic housing (4), the radiation detection circuit (2) comprises a capacitor C3, a neon lamp ND and a touch sheet CMP, and the radiation elimination conversion circuit (3) comprises a switch K, a capacitor C1 and a capacitor C2, and is characterized in that: The A1 and A2 lines of the input terminal SR of the switching power supply circuit (1) are connected to an AC 220V power supply, the positive electrode + and the negative electrode - of the output terminal SC of the switching power supply circuit (1) are DC output power supplies, the 1st foot of the switch K in the radiation elimination conversion circuit (3) is electrically connected to one end of the capacitor C1, the other end of the capacitor C1 is electrically connected to the A2 line of the AC input power line, the 3rd foot of the switch K in the radiation elimination conversion circuit (3) is electrically connected to one end of the capacitor C2, the other end of the capacitor C2 is electrically connected to the A1 line of the AC input power line, the 2nd foot of the switch K in the radiation elimination conversion circuit (3) is electrically connected to one end of the capacitor C3 and one end of the neon lamp ND in the radiation detection circuit (2), the other end of the capacitor C3 is electrically connected to the negative electrode - of the DC output power line of the switching power supply circuit (1), and the other end of the neon lamp ND is electrically connected to the touch panel CMP.

2. The radiation-free power adapter with phase conversion according to claim 1, characterized in that: The radiation detection circuit (2) is provided with a through hole at a position of the plastic housing (4) corresponding to the neon lamp ND.

3. The radiation-free power adapter with phase conversion according to claim 1, characterized in that: The touch pad CMP in the radiation detection circuit (2) is made of conductive metal material and is mounted on the outer surface of the plastic housing (4).

4. The radiation-free power adapter with phase conversion according to claim 1, characterized in that: The switching power supply circuit (1) is a universal switching power supply circuit device which inputs (220V) alternating current power (AC) and outputs direct current power (DC).

5. The radiation-free power adapter with phase conversion according to claim 1, characterized in that: The switch K in the radiation elimination conversion circuit (3) is a universal double-throw switch with a withstand voltage greater than 250V, and the toggle handle of the switch K is exposed from the outer surface of the plastic housing (4).

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