Filter circuit for solving interference of anion product on other equipment

Abstract

The utility model discloses a filter circuit for solving interference of anion products on other equipment, and belongs to the technical field of anions. The filter circuit provided by the utility model comprises the common-mode signal filter and the differential-mode signal filter, the filter circuit is connected between the negative ion equipment and the power supply, and common-mode interference and differential-mode interference generated by a negative ion product in the use process are respectively filtered by the common-mode signal filter and the differential-mode signal filter in the filter circuit. The influence of interference signals on other electric appliances connected to the same power supply through the power supply is avoided, the damage to equipment is reduced, and the use safety of the negative ion electric appliance is improved.

Description

Technical Field

[0001] The utility model relates to a filter circuit for solving the interference of negative ion products on other equipment, belonging to the technical field of negative ions. Background Art

[0002] It is widely recognized that negative ions have the functions of air purification and health care. With people's demand for health, negative oxygen ion products are favored by people. However, negative ion devices have high-voltage circuits, which can easily cause interference to other devices, especially when using the same power system. This interference can cause other devices to work abnormally or even damage other devices. If negative ion devices are used in cars, they can interfere with the car's electronic equipment and affect the safe driving of the car. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a filter circuit to solve the interference of negative ion products on other devices. The technical solution is as follows:

[0004] The filtering circuit comprises: a common mode signal filter and a differential mode signal filter;

[0005] The common mode signal filter comprises: a variable resistor RV, a common mode inductor T1, a first resistor R1 and a second resistor R2;

[0006] The differential mode signal filter comprises: an inductor L1, a first transient suppression diode TVS1, a second transient suppression diode TVS2 and a capacitor C1;

[0007] The two ends of the variable resistor RV are respectively connected to the two ends of the negative ion module; the input end of the common-mode inductor T1 is connected in parallel with the variable resistor RV; the first resistor R1 and the second resistor R2 are connected in series, and one end connected to each other is grounded, and both ends are connected in parallel with the output end of the common-mode inductor T1; the anodes of the first transient suppression diode TVS1 and the second transient suppression diode TVS2 are connected, and the inductor L1 is connected between the cathode of the first transient suppression diode TVS1 and the first resistor R1; the capacitor C1 is connected across the cathodes of the first transient suppression diode TVS1 and the second transient suppression diode TVS2.

[0008] In one embodiment, the filter circuit is connected between the negative ion module and the power supply.

[0009] In one embodiment, the power supply includes: a DC power supply and an AC power supply. The AC power supply is converted into the DC power supply by a power conversion circuit to power the negative ion module. The AC power supply is also connected to other electrical devices.

[0010] In one implementation, the power conversion circuit includes: a power adapter.

[0011] In one embodiment, the negative ion module is a negative ion electrical appliance, including: a negative ion hair dryer, a negative ion air purifier.

[0012] Advantages of the utility model:

[0013] The utility model provides a filtering circuit for solving the problem of interference of negative ion products on other devices. A filtering module is connected between the negative ion device and the power supply. The common-mode signal filter and the differential-mode signal filter in the filtering module respectively filter out the common-mode interference and differential-mode interference generated by the negative ion product during use, thereby avoiding the influence of the high-voltage circuit of the negative ion device on other electrical appliances connected to the same power supply through the power supply, reducing damage to the equipment, and improving the safety of the use of negative ion appliances. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the utility model of the present invention.

[0015] Figure 2 This is a circuit structure diagram of the filter module of the utility model of the present invention. DETAILED DESCRIPTION

[0016] The following is a specific description of the utility model.

[0017] This embodiment provides a filter circuit for solving the interference of negative ion products on other devices.

[0018] like Figure 1 The figure shows the overall circuit connection diagram of the negative ion device, which includes: a negative ion module, a filter module, a DC power supply, an AC power supply and other devices in the circuit.

[0019] The power supply of the negative ion module is converted from the AC power supply of the mains into a DC power supply (such as a power adapter) through a power conversion circuit, and then provided to it after passing through the filter module. When the negative ion module is working, the existence of high voltage will cause common mode interference to the negative ion module itself. If there is no filter module, the common mode interference signal will interfere with other devices on the same power supply through the connection between the DC power supply and the AC power supply.

[0020] As can be seen from the figure, this structure sets the negative ion module as the output system (interference output), and the corresponding DC power supply, AC power supply and other devices are the input system. Its structure is opposite to the working process of the usual structure.

[0021] like Figure 2 As shown, it is a specific circuit diagram of the filtering module, and the circuit includes a common-mode signal filter and a differential-mode signal filter.

[0022] The common mode signal filter includes: a variable resistor RV, a common mode inductor T1, a resistor R1 and a resistor R2, and the differential mode signal filter includes: an inductor L1, a transient suppression diode TVS1, a transient suppression diode TVS2 and a capacitor C1.

[0023] The two ends of the variable resistor RV are respectively connected to the two ends of the negative ion module, the input end of the common mode inductor T1 is connected in parallel with the variable resistor RV, the resistor R1 and the resistor R2 are connected in series and grounded in the middle, and the two ends are connected in parallel with the output end of the common mode inductor T1.

[0024] One end of the resistor R1 and the resistor R2 connected to each other is grounded.

[0025] One end of the inductor L1 is connected to the resistor R1 , and the other end of the inductor L1 is connected to the cathode of the transient voltage suppressor diode TVS1 .

[0026] Anodes of the transient suppression diode TVS1 and the transient suppression diode TVS2 are connected to each other, and both ends of the capacitor C1 are connected across the cathodes of TVS1 and TVS2.

[0027] The working principle of this utility model:

[0028] 1. When the negative ion module is working, the high-voltage circuit generates a common-mode interference signal to the system (the high-voltage electric field generates static electricity), and the signal is introduced into the earth GND through the common-mode filter composed of RV, T1, R1, and R2.

[0029] 2. L1, TVS1, TVS2, and C1 form a differential signal filter. The differential signal is caused by the interference of negative ion appliances, which forms a voltage difference between the positive and negative ends of the power supply. If it is not processed, it is easy to cause damage to other equipment. The voltage difference can be eliminated through the differential signal filter.

[0030] Although the present invention has been disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A filter circuit for solving the interference of negative ion products on other equipment, characterized in that: The filtering circuit comprises: a common mode signal filter and a differential mode signal filter; The common mode signal filter comprises: a variable resistor (RV), a common mode inductor (T1), a first resistor (R1) and a second resistor (R2); The differential mode signal filter comprises: an inductor (L1), a first transient voltage suppressor diode (TVS1), a second transient voltage suppressor diode (TVS2) and a capacitor (C1); The two ends of the variable resistor (RV) are respectively connected to the two ends of the negative ion module; the input end of the common mode inductor (T1) is connected in parallel with the variable resistor (RV); the first resistor (R1) and the second resistor (R2) are connected in series, and one end connected to each other is grounded, and the two ends are connected in parallel with the output end of the common mode inductor (T1); the anodes of the first transient suppression diode (TVS1) and the second transient suppression diode (TVS2) are connected, and the inductor (L1) is connected between the cathode of the first transient suppression diode (TVS1) and the first resistor (R1); the capacitor (C1) is connected across the cathodes of the first transient suppression diode (TVS1) and the second transient suppression diode (TVS2).

2. The filter circuit for solving the interference of negative ion products on other equipment according to claim 1 is characterized in that: The filter circuit is connected between the negative ion module and the power supply.

3. The filter circuit for solving the interference of negative ion products to other equipment according to claim 2 is characterized in that: The power supply includes: a DC power supply and an AC power supply. The AC power supply is converted into the DC power supply by a power conversion circuit to supply power to the negative ion module. The AC power supply is also connected to other electrical equipment.

4. The filter circuit for solving the interference of negative ion products to other equipment according to claim 3 is characterized in that: The power conversion circuit includes: a power adapter.

5. The filter circuit for solving the interference of negative ion products to other equipment according to claim 2, characterized in that: The negative ion module is a negative ion electrical appliance, including: a negative ion hair dryer and a negative ion air purifier.

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