Anti-electromagnetic-disturbance negative ion generating circuit and negative ion generator
阅读说明：本技术 一种防电磁骚扰的负离子发生电路及负离子发生器 (Anti-electromagnetic-disturbance negative ion generating circuit and negative ion generator ) 是由 李一峰 刘子宽 刘佳林 于 2019-11-13 设计创作，主要内容包括：本发明公开一种防电磁骚扰的负离子发生电路及负离子发生器。该负离子发生电路包括正极与市电火线相连的整流二极管D1、负极与市电零线相连的整流二极管D2、分别与整流二极管D1及整流二极管D2串接的电阻R6和电阻R5、高压变压器T1及与高压变压器T1的一次侧线圈的第一端相连的电容CX2以及与电容CX2并联的振荡电阻、连接在电阻R6与电阻R5之间的放电管DZ以及与放电管DZ反向并联的二极管D3,高压变压器T1的一次侧线圈的第二端与二极管D3的正极相连。本发明使用放电管代替可控硅,具有电磁骚扰较弱的特点,不仅符合EMI规范也简化了产品的整体结构并降低了产品的实现成本。(The invention discloses an electromagnetic disturbance prevention negative ion generating circuit and a negative ion generator. The negative ion generating circuit comprises a rectifying diode D1 with the anode connected with a live wire of a commercial power, a rectifying diode D2 with the cathode connected with a zero wire of the commercial power, a resistor R6 and a resistor R5 which are respectively connected with the rectifying diode D1 and the rectifying diode D2 in series, a high-voltage transformer T1, a capacitor CX2 connected with the first end of a primary side coil of the high-voltage transformer T1, an oscillating resistor connected with the capacitor CX2 in parallel, a discharge tube DZ connected between the resistor R6 and the resistor R5, and a diode D3 connected with the discharge tube DZ in inverse parallel, wherein the second end of the primary side coil of the high-voltage transformer T1 is connected with the anode of the diode D3. The invention uses the discharge tube to replace the controlled silicon, has the characteristic of weaker electromagnetic disturbance, not only accords with the EMI specification, but also simplifies the integral structure of the product and reduces the realization cost of the product.)
1. An electromagnetic disturbance prevention negative ion generating circuit comprising: the high-voltage transformer comprises a rectifier diode D1 with the anode connected with a live wire of a mains supply, a rectifier diode D2 with the cathode connected with a zero line of the mains supply, a resistor R6 and a resistor R5 which are respectively connected with a rectifier diode D1 and a rectifier diode D2 in series, a high-voltage transformer T1, a capacitor CX2 connected with a first end of a primary side coil of the high-voltage transformer T1, and an oscillation resistor connected with the capacitor CX2 in parallel, and is characterized by further comprising a discharge tube DZ connected between the resistor R6 and the resistor R5 and a diode D3 connected with the discharge tube DZ in reverse parallel, wherein the second end of the primary side coil of the high-voltage transformer T1 is connected with the anode of the diode.
2. The circuit of claim 1, wherein the oscillating resistor comprises a resistor R3 and a resistor R4 connected in series.
3. An electromagnetic disturbance prevention anion generating circuit as claimed in claim 1, wherein an electromagnetic absorption circuit is further provided at a second end of the primary side coil of the high voltage transformer T1.
4. The anion generating circuit for preventing electromagnetic disturbance according to claim 3, wherein the electromagnetic absorption circuit comprises a capacitor CX3 connected between the second end of the primary coil of the high voltage transformer T1 and the ground, and a resistor R7 connected in parallel with the capacitor CX 3.
5. An anion generator comprising a housing, a circuit board provided in the housing, and a pair of discharge cells, wherein the circuit board has the anion generating circuit for preventing electromagnetic disturbance according to any one of claims 1 to 4, and the pair of discharge cells are connected to the first terminal OUT1 and the second terminal OUT2 of the secondary side coil of the high voltage transformer T1, respectively.
6. The ionizer of claim 5 wherein a reverse rectifying diode is connected in series with the first terminal OUT1 of the secondary winding of the high voltage transformer T1.
7. The ionizer according to claim 5, wherein two discharge monoliths are oppositely disposed at a predetermined distance.
8. The negative ion generator of claim 5, wherein the discharge single sheet is a discharge needle or a discharge electrode sheet.
9. The anion generator as claimed in claim 5, 6, 7 or 8, wherein a surrounding copper tape is provided on the circuit board at the periphery of the region where the anion generating circuit is distributed on the circuit board, and the capacitor CX3 is electrically connected to the ground through the surrounding copper tape.
10. The anion generator as claimed in claim 9, wherein a plurality of copper-clad tips extending to both sides of the surrounding copper-clad tape are provided at intervals on the surrounding copper-clad tape.
Technical Field
The invention relates to the technical field of anion generation, in particular to an electromagnetic disturbance prevention anion generating circuit and an anion generator.
Background
Fig. 1 is a schematic circuit diagram of a negative ion generating circuit in the prior art. The commercial power is rectified by a diode D1 and then charges a capacitor CX1, the commercial power is divided by voltage dividing resistors R1 and R2 and then charges a capacitor C3, when a capacitor C3 is charged until a starting silicon controlled rectifier SCR is conducted, a capacitor CX1, a primary side coil of a high-voltage transformer T1 and the silicon controlled rectifier SCR form a discharge loop, a secondary side coil of the high-voltage transformer T1 induces and boosts the voltage to a high voltage of thousands of volts or even about ten thousand of volts, two ends OUT1 and OUT2 of the secondary side coil of the high-voltage transformer T1 are respectively connected with a pair of discharge heads with a certain distance, so that the 2 discharge heads ionize air under the action of high voltage to generate negative ions and ozone, and the negative ions enable the air to generate fresh air and enable people to feel.
Because above-mentioned anion generating circuit lets silicon controlled rectifier SCR trigger repeatedly to switch on and turn-off through the repeated charge-discharge of electric capacity CX1, and control silicon controlled rectifier SCR break-make is the "chopper" method that has adopted pure hardware, and the electromagnetism that produces harass is comparatively serious, for this reason, prior art adopts multiple mode to combine to reduce the electromagnetism harass in order to accord with EMI standard requirement: firstly, as shown in fig. 2, the high-voltage transformer T1 is placed as a high-voltage circuit package 1 in an
In summary, the prior art has at least the following disadvantages: the negative ion generating circuit uses the silicon controlled rectifier as the switching element of break-make repeatedly, and the great needs of silicon controlled rectifier occupy great space, and the inconvenient machine automated production that is unfavorable for of the foot shaping of silicon controlled rectifier with high costs and silicon controlled rectifier, and the key is that the silicon controlled rectifier utilizes the control mode of pure hardware repeated switch to be difficult to satisfy the EMI requirement, needs reduce the electromagnetism disturbance through setting up modes such as electromagnetic shield cover even metal pad pasting in the aspect of handling EMI, and the structure is complicated and the realization cost is higher.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an anti-electromagnetic-disturbance negative ion generating circuit and a negative ion generator, wherein the negative ion generating circuit uses a discharge tube to replace a silicon controlled rectifier so as to simplify the circuit structure and obtain better anti-electromagnetic-disturbance performance.
The invention provides an anti-electromagnetic disturbance anion generating circuit, which comprises: a rectifier diode D1 with the anode connected with the live wire of the commercial power, a rectifier diode D2 with the cathode connected with the zero line of the commercial power, a resistor R6 and a resistor R5 respectively connected with the rectifier diode D1 and the rectifier diode D2 in series, a high-voltage transformer T1, a capacitor CX2 connected with the first end of the primary side coil of the high-voltage transformer T1, an oscillating resistor connected with the capacitor CX2 in parallel, a discharge tube DZ connected between the resistor R6 and the resistor R5, and a diode D3 connected with the discharge tube DZ in reverse parallel, wherein the second end of the primary side coil of the high-voltage transformer T1 is connected with the anode of a diode D3.
The oscillating resistor comprises a resistor R3 and a resistor R4 which are connected in series.
An electromagnetic absorption circuit is further provided at a second end of the primary coil of the high-voltage transformer T1.
The electromagnetic absorption circuit comprises a capacitor CX3 connected between the second end of the primary side coil of the high-voltage transformer T1 and the ground, and a resistor R7 connected in parallel with the
Correspondingly, the invention discloses a negative ion generator which comprises a shell, a circuit board arranged in the shell and a pair of discharging units, wherein the circuit board is provided with the negative ion generating circuit for preventing electromagnetic disturbance, and the pair of discharging units are respectively connected with a first end OUT1 and a second end OUT2 of a secondary side coil of a high-voltage transformer T1.
Wherein, a reverse rectifying diode is connected in series with a first terminal OUT1 of a secondary side coil of the high voltage transformer T1.
Wherein, two discharge single chips are oppositely arranged with a preset distance.
Wherein, the discharge single sheet is a discharge needle or a discharge electrode plate.
Wherein, a surrounding copper tape is arranged on the circuit board and at the periphery of the area where the negative ion generating circuit is distributed on the circuit board, and the capacitor CX3 is electrically connected with the ground through the surrounding copper tape.
Wherein, a plurality of copper coating tips extending to two sides of the surrounding copper coating belt are arranged on the surrounding copper coating belt at intervals.
Compared with the prior art, the invention has the following beneficial effects:
the invention uses the discharge tube to replace the silicon controlled rectifier in the prior art as the control switch in the negative ion generating circuit, thereby not only simplifying the circuit structure, but also reducing the electromagnetic disturbance signal generated by the silicon controlled rectifier using pure hardware to repeatedly conduct and stop, so that the negative ion generating circuit does not need to separately add an electromagnetic shielding cover to the high-voltage transformer, and does not need to additionally add a metal film to the inner side of the shell of the used product to block the electromagnetic radiation disturbance, and the invention not only accords with the EMI specification due to weaker electromagnetic disturbance, but also simplifies the whole structure of the product and reduces the realization cost of the product. In addition, the discharge tube is fixedly arranged on the circuit board, so that the discharge tube is convenient to produce and process compared with the silicon controlled rectifier, the processing cost is reduced, and the production efficiency is improved.
Drawings
Fig. 1 is a circuit schematic diagram of one kind of anion generating circuit in the prior art.
Fig. 2 is a schematic view of a mounting structure of a high-pressure bag in the prior art.
Fig. 3 is a schematic view of a structure of a housing of a related art anion generator.
Fig. 4 is a schematic circuit diagram of the disclosed negative ion generating circuit.
Fig. 5 is a schematic view of a circuit board of the disclosed anion generator.
Detailed Description
To further clarify the technical solutions and effects adopted by the present application to achieve the intended purpose, the following detailed description is given with reference to the accompanying drawings and preferred embodiments according to the present application. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As shown in fig. 4, the present invention discloses an electromagnetic disturbance prevention negative ion generating circuit, comprising: the high-voltage transformer T-1 comprises a rectifier diode D1 with the anode connected with a live line AC-L of a commercial power, a rectifier diode D2 with the cathode connected with a null line AC-N of the commercial power, a resistor R6 and a resistor R5 which are respectively connected with a rectifier diode D1 and a rectifier diode D2 in series, a discharge tube DZ connected between the resistor R6 and the resistor R5, a diode D3 which is connected with the discharge tube DZ in reverse parallel, a high-voltage transformer T1, a capacitor CX2 connected between the cathode of the diode D3 and the first end of the primary side coil of the high-voltage transformer T1, and an oscillating resistor connected with the capacitor CX2 in parallel, wherein the second end of the primary side coil of the high-voltage transformer T1 is connected.
The oscillating resistor comprises a resistor R3 and a resistor R4 which are connected in series. The oscillation frequency and the oscillation voltage of an RC oscillator formed by the oscillation resistor and the capacitor CX2 can be changed by adjusting the resistance value of the oscillation resistor through the resistor R3 or/and the resistor R4, and further, the trigger frequency for triggering the conduction of the discharge tube DZ and the output voltage of the secondary side coil of the high-voltage transformer T1 are changed.
An electromagnetic absorption circuit is further provided at the second end of the primary coil of the high-voltage transformer T1, the electromagnetic absorption circuit includes a capacitor CX3 connected between the second end of the primary coil of the high-voltage transformer T1 and ground and a resistor R7 connected in parallel with the capacitor CX3, and an RC oscillator is formed by the capacitor CX3 and the resistor R7. Electromagnetic disturbance generated in the working process of the primary side coil of the high-voltage transformer T1 is oscillated and digested by the electromagnetic absorption circuit, so that the electromagnetic disturbance generated by the negative ion generating circuit to the outside is reduced.
The working principle of the negative ion generating circuit disclosed by the invention is as follows: (1) the commercial power is rectified by a rectifier diode D1 and current-limited by a resistor R6, then the capacitor CX2 is charged, at the moment, the discharge tube DZ is in a disconnected state, and the voltage forms a loop through a primary side coil of a high-voltage transformer T1; (2) when the capacitor CX2 is charged to a voltage higher than the conduction voltage of the discharge tube DZ, the capacitor CX2 is in a discharge state, the voltage superposed at the two ends of the discharge tube DZ reaches or is higher than the conduction voltage at the time, the discharge tube DZ is in a conduction state, and the voltage does not pass through the primary side coil of the high-voltage transformer T1 any more; (3) when the voltage superposed across the discharge tube DZ is lower than the preset value with the discharge time of the capacitor CX2, the discharge tube DZ is again in the off state, i.e., the above-mentioned (1) and (2) are continuously repeated. Correspondingly, when a voltage passes through the primary winding of the high voltage transformer T1, a voltage up to thousands of volts or even tens of thousands of volts is induced between the two terminals OUT1 and OUT2 of the secondary winding of the high voltage transformer T1. In practical use, a reverse rectifier diode (not shown) is connected in series with the first end OUT1 of the secondary side coil of the high-voltage transformer T1 to rectify the voltage of the secondary side coil of the high-voltage transformer T1 into a direct-current voltage, and then the first end OUT1 and the second end OUT2 of the secondary side coil of the high-voltage transformer T1 are respectively connected with a discharge single chip, and the two discharge single chips are oppositely arranged at a preset distance, so that the two discharge single chips generate negative ions and ozone from air current under the action of high-voltage direct current. The discharge single sheet is generally a discharge needle or a discharge electrode plate.
Because the negative ion generating circuit does not use silicon controlled rectifier as on-off control any more, the electromagnetic disturbance signal generated correspondingly is greatly reduced, the high-voltage transformer T1 is not required to be packaged by an electromagnetic shielding cover, and a metal film for reducing electromagnetic radiation is not required to be attached to the inner side wall of the shell of the negative ion generator, so that the structure of a product is simplified, and the realization cost of the product is reduced. As shown in fig. 5, specifically, when the negative ion generating circuit is implemented in a negative ion generator, the negative ion generator includes a housing, a
In order to further reduce the electromagnetic conductive disturbance signals of the above-mentioned anion generating circuits on the circuit board, in the preferred embodiment shown in fig. 5, a
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
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