Negative ion generating circuit and device based on air conditioning system

Abstract

The utility model provides a kind of negative ion generating circuit and device based on air conditioning system, comprising: filter circuit, rectifier circuit, switching power supply and piezoelectric transformer;Filter circuit is connected with live wire, zero line respectively;Rectifier circuit is connected with live wire, zero line and switching power supply respectively;Switching power supply is connected with piezoelectric transformer, and the output end of piezoelectric transformer is connected with the external negative ion guiding device;The high voltage electric field connecting end of negative ion guiding device is connected with the output end of piezoelectric transformer, and the reference ground connecting end of negative ion guiding device is connected with the signal ground end of switching power supply, and reference ground connecting end is also connected to ground end or the power ground end of rectifier circuit by high voltage resistance.The utility model optimizes the circuit design in the scheme of installing negative ion generating device based on air conditioning system, and can reduce leakage current.

Description

Technical Field

[0001] This utility model relates to the field of air purification technology, and in particular to a negative ion generating circuit and device based on an air conditioning system. Background Technology

[0002] Adding a negative ion generator to the existing air conditioning system to purify the air and decompose odor molecules is an effective renovation solution to improve indoor air quality.

[0003] In related circuit designs, the negative ion generator is usually directly connected to the ground wire. While this simplifies the wiring layout, it presents significant electrical safety and functional defects. For example, when a negative ion generator is working, it produces an electric field and ion flow of a certain intensity. Direct grounding may lead to current leakage, unstable operation of the device, and other problems. This not only affects the release efficiency of negative ions but may also cause electrical faults, posing potential safety risks. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a negative ion generating circuit and device based on an air conditioning system. It solves the problem that existing air conditioning system retrofit schemes directly connect the negative ion guiding end to the ground wire in the circuit design, which has electrical safety and functional defects.

[0005] According to an embodiment of the present invention, a negative ion generating circuit based on an air conditioning system includes: a filter circuit, a rectifier circuit, a switching power supply, and a piezoelectric transformer.

[0006] The filter circuit is connected to the live wire and the neutral wire respectively; the rectifier circuit is connected to the live wire, the neutral wire and the switching power supply respectively; the switching power supply is connected to the piezoelectric transformer, and the output terminal of the piezoelectric transformer is connected to an external negative ion guiding device; an external power supply is connected between the live wire and the neutral wire.

[0007] The filter circuit, rectifier circuit, and switching power supply are integrated on the air conditioning system main board.

[0008] The negative ion guiding device includes a reference ground connection terminal and a high-voltage electric field connection terminal. The high-voltage electric field connection terminal is connected to the output terminal of the piezoelectric transformer, and the reference ground connection terminal is connected to the signal ground terminal of the switching power supply. The reference ground connection terminal is also connected to the ground terminal or the power ground terminal of the rectifier circuit through a high-voltage resistor.

[0009] Optionally, the filter circuit includes a first capacitor and a second capacitor;

[0010] One end of the first capacitor is connected to the live wire, one end of the second capacitor is connected to the neutral wire, and the other ends of the first capacitor and the other ends of the second capacitor are connected to the ground.

[0011] Optionally, the rectifier circuit includes a rectifier bridge composed of a first diode, a second diode, a third diode, and a fourth diode;

[0012] The cathodes of the first diode and the second diode are the voltage output terminals of the rectifier circuit, and the anodes of the third diode and the fourth diode are the power ground terminals of the rectifier circuit; the anode of the first diode and the cathode of the fourth diode are connected to the neutral wire, and the anode of the second diode and the cathode of the third diode are connected to the live wire.

[0013] Optionally, the switching power supply includes a first inductor and a second inductor coupled to each other;

[0014] The two ends of the first inductor are connected to the voltage output terminal and the power ground terminal of the rectifier circuit, respectively. One end of the second inductor is the voltage output terminal of the switching power supply, and the other end of the second inductor is the signal ground terminal of the switching power supply.

[0015] Optionally, the reference ground connection terminal is connected to one end of the high-voltage resistor, and the other end of the high-voltage resistor is connected to the ground terminal.

[0016] Optionally, the reference ground connection terminal is connected to one end of the high-voltage resistor, and the other end of the high-voltage resistor is connected to the power ground terminal of the rectifier circuit.

[0017] Optionally, the voltage transformer is a ROSEN piezoelectric transformer.

[0018] On the other hand, according to an embodiment of the present invention, a negative ion generating device based on an air conditioning system is also provided, including a negative ion guiding device and a negative ion generating circuit as described above.

[0019] Optionally, it also includes a negative ion shield; the negative ion shield is used to house the negative ion guiding device.

[0020] Optionally, the negative ion guiding device is a high-voltage carbon brush.

[0021] The technical principle of this utility model is as follows: a weak leakage current will flow through the signal ground terminal of the switching power supply after the reference ground connection terminal of the negative ion guiding device, and then through the high voltage resistor to the ground terminal or the power ground terminal of the rectifier circuit, thereby forming a reference ground with it. Then, an uneven electric field will be formed between the high voltage electric field connection terminal of the negative ion guiding device and the reference ground connection terminal of the negative ion guiding device, causing air ionization and generating negative ions.

[0022] Compared to existing technologies, this invention offers the following advantages: Firstly, it provides a solution for directly connecting the reference ground connection terminal of the negative ion guiding device to the ground terminal, reducing the need for external ground wires. Secondly, it provides a solution for connecting the reference ground connection terminal of the negative ion guiding device to the power ground terminal of the rectifier circuit, facilitating the layout design of the air conditioner mainboard. Simultaneously, the introduction of a high-voltage, high-resistance resistor reduces leakage current. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the negative ion generating circuit based on an air conditioning system according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the circuit structure of the negative ion generating circuit based on the air conditioning system according to an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the circuit structure of the negative ion generating circuit based on the air conditioning system according to an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram illustrating the practical application of the negative ion generator based on an air conditioning system, according to an embodiment of this utility model.

[0027] In the above attached diagram: 10, filter circuit; 20, rectifier circuit; 30, switching power supply; 40, piezoelectric transformer; 50, negative ion guiding device; 60, negative ion cover. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0029] like Figure 1 As shown, this utility model embodiment proposes a negative ion generating circuit based on an air conditioning system, which is a modification scheme based on an air conditioning system. It includes a filter circuit 10, a rectifier circuit 20, a switching power supply 30, and a piezoelectric transformer 40. Furthermore, the filter circuit 10, the rectifier circuit 20, and the switching power supply 30 are integrated on the main board of the air conditioning system.

[0030] The connection relationships of the above components are as follows: the filter circuit 10 is connected to the live wire L, the neutral wire N, and the rectifier circuit 20; the rectifier circuit 20 is connected to the live wire L, the neutral wire N, and the switching power supply 30; the switching power supply 30 is connected to the piezoelectric transformer 40, and the output terminal of the piezoelectric transformer 40 is connected to the external negative ion guiding device 50; an external 220V power supply is connected between the live wire L and the neutral wire N. Figure 2 and Figure 3As shown, the detailed connection relationship between the negative ion guiding device 50 and the negative ion generating circuit is as follows: the negative ion guiding device 50 includes a reference ground connection terminal VGND and a high-voltage electric field connection terminal HV. The high-voltage electric field connection terminal HV is connected to the output terminal of the piezoelectric transformer 40, and the reference ground connection terminal VGND is connected to the signal ground terminal SGND of the switching power supply 30, and as shown... Figure 2 As shown, the reference ground connection terminal VGND is also connected to the ground terminal GND through a high-voltage resistor R, as follows. Figure 3 As shown, the reference ground connection terminal VGND is also connected to the power ground terminal PGND of the rectifier circuit 20 through a high-voltage resistor R.

[0031] After the negative ion generating circuit based on the air conditioning system provided in this embodiment of the invention is connected to the negative ion guiding device 50, a weak leakage current will flow through the signal ground terminal SGND of the switching power supply 30 via the reference ground connection terminal VGND of the negative ion guiding device 50, and through the high-voltage resistor R to the ground terminal GND or the power ground terminal PGND of the rectifier circuit 20, thus forming a reference ground with it. A non-uniform electric field will then be formed between the high-voltage electric field connection terminal HV of the negative ion guiding device 50 and the reference ground connection terminal VGND of the negative ion guiding device 50, causing air ionization and generating negative ions. Therefore, based on the negative ion generating circuit based on the air conditioning system provided in this embodiment of the invention, on the one hand, a scheme is provided for directly connecting the reference ground connection terminal VGND of the negative ion guiding device 50 to the ground terminal GND, reducing the need for an external ground wire; on the other hand, a scheme is provided for connecting the reference ground connection terminal VGND of the negative ion guiding device 50 to the power ground terminal PGND of the rectifier circuit 20, facilitating the layout design of the air conditioning mainboard. Simultaneously, the introduction of a high-voltage, high-resistance resistor reduces the leakage current.

[0032] Furthermore, it should be noted that in this embodiment of the present invention, the high-voltage resistor R refers to a withstand voltage of 3.5KV or higher, and for example, the resistance value of the high-voltage resistor R is 10MΩ. It can be understood that the creepage distance between the two ends of the high-voltage resistor R meets the safety requirements, thereby ensuring the normal operation of the circuit and reducing leakage current.

[0033] like Figure 2 and Figure 3 As shown, this utility model embodiment also provides detailed circuit implementations of the above-mentioned components.

[0034] In a preferred implementation, the filter circuit 10 includes a first capacitor C1 and a second capacitor C2; wherein one end of the first capacitor C1 is connected to the live wire L, one end of the second capacitor C2 is connected to the neutral wire N, and the other ends of the first capacitor C1 and the other ends of the second capacitor C2 are connected to the ground terminal GND.

[0035] In a preferred implementation, the rectifier circuit 20 includes a rectifier bridge composed of a first diode D1, a second diode D2, a third diode D3, and a fourth diode D4; wherein, the common cathode of the first diode D1 and the second diode D2 is the voltage output terminal DC310V of the rectifier circuit 20, and the anode of the third diode D3 and the fourth diode D4 is the power ground terminal PGND of the rectifier circuit 20; the anode of the first diode D1 is connected to the cathode of the fourth diode D4 and connected to the neutral line N, and the anode of the second diode D2 and the cathode of the third diode D3 are connected to the live line L.

[0036] In a preferred implementation, the switching power supply 30 includes a first inductor L1 and a second inductor L2 coupled to each other; wherein, the two ends of the first inductor L1 are connected to the voltage output terminal of the rectifier circuit 20 and the power ground terminal PGND of the rectifier circuit 20, respectively, one end of the second inductor L2 is the voltage output terminal DC12V of the switching power supply 30, and the other end of the second inductor L2 is the signal ground terminal SGND of the switching power supply 30.

[0037] In this embodiment of the invention, the reference ground connection terminal VGND of the negative ion guiding device 50 is not directly connected to the ground terminal GND or the power ground terminal PGND of the rectifier circuit 20, and also includes a high-voltage resistor R. Therefore, firstly, the reference ground connection terminal VGND is connected to the signal ground terminal SGND of the switching power supply 30. Secondly, in one embodiment, such as... Figure 2 As shown, the reference ground connection terminal VGND is connected to one end of the high-voltage resistor R, and the other end of the high-voltage resistor R is connected to the ground terminal GND; it should be noted that, based on Figure 2 A small leakage current flows through the signal ground of the switching power supply 30 output terminal from the reference ground VGND of the negative ion carbon brush, and then directly to the ground terminal GND through the high-voltage resistor R, forming a reference ground with the ground. In another embodiment, such as Figure 3 As shown, the reference ground connection terminal VGND is connected to one end of the high-voltage resistor R, and the other end of the high-voltage resistor R is connected to the power ground terminal PGND of the rectifier circuit 20. It should be noted that, based on... Figure 3 A weak leakage current flows from the reference ground connection terminal VGND of the negative ion guiding device 50 through the signal ground terminal SGND of the switching power supply 30, through the high voltage resistor R to the power ground terminal PGND of the rectifier circuit 20, and then back to the input neutral line N through the rectifier circuit 20. It then flows to the ground terminal GND through the capacitor or varistor in the filter circuit 10, forming a reference ground with the ground.

[0038] Based on the above Figure 2 and Figure 3 The negative ion generating circuit based on the air conditioning system provided by this utility model has a compact circuit structure, small size, light weight, and is easy to install and maintain.

[0039] In a preferred implementation, the negative ion generating circuit based on an air conditioning system provided in this embodiment of the invention is as described above. Figure 1 , Figure 2 as well as Figure 3 The voltage transformer is a ROSEN piezoelectric transformer. In specific applications, the ROSEN transformer employs sinusoidal wave control technology to ensure efficient and stable operation at its resonant frequency. When an ion generator, such as a carbon brush, is accidentally touched, an additional electrical connection is created. This additional connection disrupts the original circuit balance, causing a change in the ROSEN transformer's resonant conditions. The control components in the ROSEN transformer circuit, such as the MCU and oscillation circuit, will readjust their operating points to adapt to the new resonant conditions. During this adjustment process, the high-voltage output drops rapidly, thereby reducing the risk of potential harm to the human body.

[0040] Another embodiment of this utility model provides a negative ion generating device based on an air conditioning system, including a negative ion guiding device 50 and the negative ion generating circuit in the above embodiment.

[0041] like Figure 4 As shown, in a specific application, the aforementioned negative ion generator based on an air conditioning system further includes a negative ion cover 60; the negative ion cover 60 is used to house the negative ion guiding device 50. The negative ion cover 60 is positioned outside the negative ion guiding device 50 to prevent human touch and improve safety. Figure 4 For example, the negative ion generator based on the air conditioning system includes two sets of negative ion guiding devices 50 and a negative ion cover 60, with the negative ion cover 60 disposed on both sides of the air conditioner outlet. The two sets of negative ion guiding devices are respectively installed on the left and right sides of the air conditioner outlet, increasing the amount of negative ions generated while making the negative ions more evenly distributed in the room.

[0042] In a preferred implementation, the negative ion guiding device 50 is a high-voltage carbon brush. It should be noted that when the negative ion generator based on the air conditioning system includes two sets of negative ion guiding devices 50 and a negative ion cover 60, the two high-voltage carbon brushes located at the reference ground connection terminal VGND and the two high-voltage carbon brushes located at the high-voltage electric field connection terminal HV are connected in parallel inside the negative ion high-voltage pack.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A negative ion generating circuit based on an air conditioning system, characterized in that, include: Filtering circuits, rectifier circuits, switching power supplies, and piezoelectric transformers; The filter circuit is connected to the live wire and the neutral wire respectively; The rectifier circuit is connected to the live wire, the neutral wire, and the switching power supply respectively; the switching power supply is connected to the piezoelectric transformer, and the output terminal of the piezoelectric transformer is connected to an external negative ion guiding device. An external power source is connected between the live wire and the neutral wire; The filter circuit, rectifier circuit, and switching power supply are integrated on the air conditioning system main board. The negative ion guiding device includes a reference ground connection terminal and a high-voltage electric field connection terminal. The high-voltage electric field connection terminal is connected to the output terminal of the piezoelectric transformer, and the reference ground connection terminal is connected to the signal ground terminal of the switching power supply. The reference ground connection terminal is also connected to the ground terminal or the power ground terminal of the rectifier circuit through a high-voltage resistor.

2. The negative ion generating circuit based on an air conditioning system as described in claim 1, characterized in that, The filter circuit includes a first capacitor and a second capacitor; One end of the first capacitor is connected to the live wire, one end of the second capacitor is connected to the neutral wire, and the other ends of the first capacitor and the other ends of the second capacitor are connected to the ground.

3. The negative ion generating circuit based on an air conditioning system as described in claim 2, characterized in that, The rectifier circuit includes a rectifier bridge composed of a first diode, a second diode, a third diode, and a fourth diode; The cathodes of the first diode and the second diode are the voltage output terminals of the rectifier circuit, and the anodes of the third diode and the fourth diode are the power ground terminals of the rectifier circuit; the anode of the first diode and the cathode of the fourth diode are connected to the neutral wire, and the anode of the second diode and the cathode of the third diode are connected to the live wire.

4. The negative ion generating circuit based on an air conditioning system as described in claim 3, characterized in that, The switching power supply includes a first inductor and a second inductor that are coupled to each other. The two ends of the first inductor are connected to the voltage output terminal and the power ground terminal of the rectifier circuit, respectively. One end of the second inductor is the voltage output terminal of the switching power supply, and the other end of the second inductor is the signal ground terminal of the switching power supply.

5. The negative ion generating circuit based on an air conditioning system as described in claim 4, characterized in that, The reference ground connection terminal is connected to one end of the high-voltage resistor, and the other end of the high-voltage resistor is connected to the ground terminal.

6. The negative ion generating circuit based on an air conditioning system as described in claim 4, characterized in that, The reference ground connection terminal is connected to one end of the high-voltage resistor, and the other end of the high-voltage resistor is connected to the power ground terminal of the rectifier circuit.

7. The negative ion generating circuit based on an air conditioning system as described in any one of claims 1 to 6, characterized in that, The piezoelectric transformer is a ROSEN piezoelectric transformer.

8. A negative ion generator based on an air conditioning system, characterized in that, It includes a negative ion guiding device and a negative ion generating circuit as described in any one of claims 1 to 7.

9. The negative ion generator based on an air conditioning system as described in claim 8, characterized in that, It also includes a negative ion shield; the negative ion shield is used to house the negative ion guiding device.

10. The negative ion generator based on an air conditioning system as described in claim 9, characterized in that, The negative ion guiding device is a high-voltage carbon brush.

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