CN211017633U

CN211017633U - Power line with filter

Info

Publication number: CN211017633U
Application number: CN201921408452.8U
Authority: CN
Inventors: 崔星星; 杨顺梅
Original assignee: Guangdong Zhongrunzhi Medical Equipment Co ltd
Current assignee: Guangdong Zhongrunzhi Medical Equipment Co ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-07-14
Anticipated expiration: 2029-08-28

Abstract

The utility model relates to a power cord with wave filter, including power plug, wave filter and output plug, power plug, wave filter and output plug pass through the power cord and connect, the inside filter circuit module that is equipped with of wave filter. The utility model relates to a rationally, simple structure establishes the wave filter through adding on the power cord to make the wave filter break away from the product is inside, prevent that the inside electromagnetic interference of electronic product from influencing the filter effect, the filter circuit module of two-stage makes the filter effect better.

Description

Power line with filter

Technical Field

The utility model relates to a power filter field especially relates to a power cord of band filter.

Background

The filter is a filter circuit consisting of a capacitor, an inductor and a resistor. The filter can effectively filter the frequency point of the specific frequency in the power line or the frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency. However, the existing power filter is installed inside product equipment, when the filter is placed inside a product, due to the fact that the space layout and the electrical appliance characteristics cannot well filter out interference, and compared with the situation that the space inside a compact product is insufficient, electromagnetic interference of an electronic product is caused after installation, and the influence on detection through EMC is great.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a power cord with a filter, for installing the filter inside the product equipment, the power cord with the filter is more practical, the effect is better, can effectually prevent the electromagnetic interference of electronic product itself.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a power cord with wave filter, includes power plug, wave filter and output plug, power plug, wave filter and output plug pass through the power cord and connect, the inside filter circuit module that is equipped with of wave filter.

By adopting the technical scheme, the power plug is externally connected with the power supply of the AC220V and is filtered by the filter, so that the effect of attenuating interference signals is achieved, the interference between a power line and the ground is eliminated, and the filtered power signal is connected with product equipment through the output plug. The utility model discloses an ingenious design installs the wave filter on the power cord, prevents that the wave filter from receiving the inside electromagnetic interference of electronic product, can more effective interference signal of elimination to through EMC's detection.

Preferably, the number of the filters is two, the two filters are respectively a first filter and a second filter, a first filter circuit module is arranged in the first filter, a second filter circuit module is arranged in the second filter, and the first filter and the second filter are connected through a wire.

By adopting the technical scheme, the working principles of the first filter circuit module and the second filter circuit module in the first filter and the second filter are the same, and the two filters are arranged, so that a better filtering effect is achieved, and interference signals can be reduced to the minimum under the double filtering effect.

Preferably, the first filter circuit module includes a capacitor C3, a common mode choke L1, a capacitor CC1 and a capacitor CC5, the capacitor C3 and the common mode choke L1 are connected in series, the common mode choke L1 is connected in series with the capacitor CC1 and the capacitor CC5, the second filter circuit module includes a capacitor CC4, a common mode choke L3, a capacitor CC2, a capacitor CC6 and a resistor R1, the capacitor CC4 is connected in series with the common mode choke L3, the common mode choke L3 is connected in series with the capacitor CC2 and the capacitor CC6, the capacitor CC2, the capacitor CC6 and the resistor R1 are in hybrid, and the first filter circuit module is connected in hybrid with the second filter circuit module.

By adopting the technical scheme, in the first filter circuit module, the capacitor C3 is used for filtering the interference between the power lines, the common mode choke L1 is used for common mode interference current, the magnetic fields generated by the two coils are in the same direction, the common mode choke presents larger impedance, so that the effect of attenuating interference signals is achieved, the capacitor CC1 and the capacitor CC2 are common mode capacitors and used for eliminating the interference between the power lines and the ground, the working principle of the second filter circuit module is the same as that of the first circuit module, and the two filter circuit modules are used for achieving a better effect.

Preferably, the power plug is a delta-shaped power plug.

By adopting the technical scheme, the three-plug delta-shaped power plug is connected with an external power supply to provide power for the electronic product.

Preferably, a wire protecting sleeve is arranged between the power plug, the output plug and the power line, and a plurality of reinforcing ribs are arranged on the wire protecting sleeve.

By adopting the technical scheme, the wire inside the power line can not be broken for bending through the wire protecting sleeve, and the I-shaped reinforcing rib ensures that the power line can still ensure that the power supply of the internal wire is normal under the twisted condition.

The utility model has the advantages that: the utility model relates to a rationally, simple structure establishes the wave filter through adding on the power cord to make the wave filter break away from the product is inside, prevent that the inside electromagnetic interference of electronic product from influencing the filter effect, the filter circuit module of two-stage makes the filter effect better.

Drawings

Fig. 1 is a schematic diagram of a power line structure with a filter according to the present invention;

fig. 2 is a circuit diagram of a power line with a filter according to the present invention.

Shown in the figure: 1-power plug; 21-a first filter; 211-a first filter circuit module; 22-a second filter; 221-a second filter circuit module; 3-a power line; 4-output plug; 5-wire sheath; 51-reinforcing ribs.

Detailed Description

As shown in fig. 1, an embodiment of the present invention provides a power line with a filter, including power plug 1, filter and output plug 4, power plug 1, filter and output plug 4 are combined through a power line 3 integral type structure, and power plug 1, filter and output plug 4 are connected to each other through power line 3 internal wires.

The filter has two, and two filters are first filter 21 and second filter 22 respectively, are equipped with first filter circuit module 211 in first filter 21, and second filter circuit module 221 is equipped with in second filter 22, pass through power cord 3 and connect between first filter 21 and the second filter 22.

As shown in fig. 2, the first filter circuit module 211 includes a capacitor C3, a common mode choke L1, a capacitor CC1, and a capacitor CC5, the capacitor C3 is connected in series with the common mode choke L1, the common mode choke L1 is connected in series with the capacitor CC1 and the capacitor CC5, the second filter circuit module 221 includes a capacitor CC4, a common mode choke L3, a capacitor CC2, a capacitor CC6, and a resistor R1, the capacitor CC4 is connected in series with the common mode choke L3, the common mode choke L3 is connected in series with the capacitor CC2 and the capacitor CC6, the capacitor CC2, the capacitor CC6, and the resistor R1 are connected in series, the first filter circuit module 211 is connected in series with the second filter circuit module 221, the first filter circuit module 211 is connected with a power supply, and the second filter circuit module 221 is connected with a product device.

In one embodiment, the power plug 1 is a delta-shaped power plug 1.

In one embodiment, a wire sheath 5 is disposed between the power plug 1, the output plug 4 and the wires, and a plurality of i-shaped reinforcing ribs 51 are disposed on the wire sheath 5.

The utility model discloses an operating principle, power through the external AC220V of power plug 1, the electric current filters through first wave filter 21 and second wave filter 22, thereby play the effect of decay interference signal and eliminate the interference between power cord 3 and the ground, power signal after through the filtering is connected with product equipment through output plug 4, C3 is arranged in filtering out the interference between power cord 3 in the first filter circuit module 211, common mode choke L1 plays the effect of decay interference signal, electric capacity CC1 and electric capacity CC2 are common mode electric capacity, be used for eliminating the interference between power cord 3 and the ground, second filter circuit module 221 is the same with first filter circuit module 211 theory of operation, it can reach better filter effect to set up two filter circuit modules.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A power cord with a filter, characterized in that: including power plug, wave filter and output plug, power plug, wave filter and output plug pass through the power cord and connect, the inside filter circuit module that is equipped with of wave filter, the wave filter has two, two the wave filter is first wave filter and second wave filter respectively, the inside first filter circuit module that is equipped with of first wave filter, the inside second filter circuit module that is equipped with of second wave filter, first wave filter with the second wave filter passes through the power cord and connects.

2. The power line with a filter as claimed in claim 1, wherein the first filter circuit module comprises a capacitor C3, a common mode choke L1, a capacitor CC1 and a capacitor CC5, the capacitor C3 is connected in series with the common mode choke L1, the common mode choke L1 is connected in series with the capacitor CC1 and the capacitor CC5, the second filter circuit module comprises a capacitor CC4, a common mode choke L3, a capacitor CC2, a capacitor CC6 and a resistor R1, the capacitor CC4 is connected in series with the common mode choke L3, the common mode choke L3 is connected in series with the capacitor CC2 and the capacitor CC6, the capacitor CC2, the capacitor CC6 and the resistor R1 are connected in series, and the first filter circuit module is connected in series with the second filter circuit module.

3. A filtered power supply line as claimed in claim 1, characterized in that: the power plug is a delta-shaped power plug.

4. A filtered power supply line as claimed in claim 1, characterized in that: and a wire protecting sleeve is arranged among the power plug, the output plug and the power line, and a plurality of reinforcing ribs are arranged on the wire protecting sleeve.