CN220107819U - Switch power supply circuit of anion generator - Google Patents
Switch power supply circuit of anion generator Download PDFInfo
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- CN220107819U CN220107819U CN202320222948.6U CN202320222948U CN220107819U CN 220107819 U CN220107819 U CN 220107819U CN 202320222948 U CN202320222948 U CN 202320222948U CN 220107819 U CN220107819 U CN 220107819U
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- 150000001450 anions Chemical class 0.000 title claims description 5
- 230000003068 static effect Effects 0.000 claims abstract description 58
- 230000005611 electricity Effects 0.000 claims abstract description 38
- 238000001914 filtration Methods 0.000 claims abstract description 35
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 238000003079 width control Methods 0.000 claims abstract description 16
- 150000002500 ions Chemical class 0.000 claims description 53
- 239000003990 capacitor Substances 0.000 claims description 32
- 238000004804 winding Methods 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000000670 limiting effect Effects 0.000 claims description 8
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 230000002829 reductive effect Effects 0.000 description 5
- 239000003985 ceramic capacitor Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
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Abstract
The utility model discloses a switching power supply circuit of a negative ion generator, and relates to the technical field of switching power supplies; the switching power supply comprises a lightning protection unit, an EMI circuit, a primary side rectifying and filtering circuit, a power conversion circuit, a secondary side rectifying and filtering circuit, a voltage sampling circuit, a voltage feedback circuit, a PWM pulse width control circuit and a positive and negative static bleeder circuit; the accumulated static electricity on the secondary side is led out through the static electricity discharge circuit, so that the switching power supply is prevented from being damaged by static discharge caused by excessively high static voltage, the stable long-time operation of the switching power supply of the negative ion generator can be realized, and a reliable switching power supply is provided for the stable operation of the negative ion generator. Because the bleeder circuit exists, the safety accident caused by electrostatic discharge is avoided, and therefore, the switch power supply of the negative ion generator has higher safety.
Description
Technical Field
The utility model discloses a switching power supply circuit of a negative ion generator, and relates to the technical field of switching power supplies.
Background
Most of the negative ion generators in the current market are direct current input, and a proper direct current power supply is needed to be provided for the negative ion generators. However, the negative high voltage terminal of the negative ion generator may adsorb positive charges generated by ionized air to form positive static electricity (single electrode mode, fig. 1) or the GND terminal may adsorb negative ions generated by the negative high voltage ionized air to generate negative static electricity (positive and negative electrode mode, fig. 2) during operation, thereby introducing the positive and negative static electricity to a switching power supply connected to the negative ion generator. The inside of the switching power supply generally adopts a transformer to step down the rectified 310V of the primary side to the direct-current voltage of the required secondary side, thereby bringing about electrical isolation between the primary side and the secondary side. The secondary side of the switch power supply, which is electrically connected with the positive and negative static electricity generated by the negative ion generator, cannot be led out to the primary side due to the electrical isolation of the transformer, so that the positive and negative static electricity is accumulated on the secondary side all the time, and after a certain degree, the welding spots with the closer distance of the secondary side can generate static discharge to generate instant heavy current to burn out electronic components on the secondary side. Therefore, the switch power supply is unstable due to electrostatic discharge, and the problem of easy burnout is the technical problem that the switch power supply corresponding to the negative ion generator cannot be ignored at present.
Therefore, the utility model provides a switching power supply circuit of a negative ion generator to solve the problems.
Disclosure of Invention
Aiming at the problems in the prior art, the utility model provides a switching power supply circuit of a negative ion generator, which adopts the following technical scheme:
the switching power supply circuit of the negative ion generator comprises a lightning protection unit, an EMI circuit, a primary side rectifying and filtering circuit, a power conversion circuit, a secondary side rectifying and filtering circuit, a voltage sampling circuit, a voltage feedback circuit, a PWM pulse width control circuit and a positive and negative static discharge circuit;
the voltage sampling circuit is connected with the PWM pulse width control circuit through the voltage feedback circuit, the output end of the PWM pulse width control circuit is connected with the input end of the power conversion circuit, and the output end of the voltage feedback circuit is connected with the input end of the PWM pulse width control circuit;
the lightning protection unit is connected with the power conversion circuit through the EMI circuit and the primary side rectifying and filtering circuit in sequence, and the power conversion circuit is connected with the lightning protection unit through the positive and negative static discharge circuit;
the power conversion circuit is connected with the negative ion generator and the voltage sampling circuit through the secondary side rectifying and filtering circuit, and the input end of the voltage sampling circuit is connected with the output end of the secondary side rectifying and filtering circuit;
the positive and negative static electricity bleeder circuit is connected with the secondary side rectifying and filtering circuit in parallel.
In some implementations, the lightning protection unit includes a 1A voltage-resistant fuse (F1), a varistor (MOV 1), and a thermistor (TH 1):
the voltage dependent resistor is connected in parallel between the live wire L and the zero line N, the 1A voltage resistant fuse is connected in series with the live wire L, and the thermistor is connected in series with the zero line N.
In some implementations, the EMI circuit includes a common mode inductance (LF 1), a pair of safety Y capacitors (CY 1 and CY 2) and an X capacitor (CX 1), and a bleed resistor:
the safety Y capacitors (CY 1 and CY 2) are connected in parallel in pairs between the zero line and the live line;
the X capacitor (CX 1) and the bleeder resistor are connected in parallel between the zero line and the live line.
The common mode inductors (LF 1) are connected in series in pairs between the zero line and the live line.
In some implementations, the primary side rectifying and filtering circuit includes a rectifying bridge circuit BD1 and a capacitive-inductive pi-type filtering circuit (LC pi-type).
In some implementations, the power conversion circuit includes a spike voltage absorption loop and a three-winding transformer:
the peak voltage absorbing circuit comprises a peak voltage absorbing circuit of a primary side and a peak voltage absorbing circuit of a secondary side.
In some implementations, the voltage sampling circuit includes a pull-down divider resistor R12 (2K) and an adjustable divider resistor RT1 (5K), and pull-up divider resistors R10 (100R) and R11 (15K).
In some implementations, the voltage feedback circuit includes a voltage stabilizing control chip U4 (AZ 431), a compensation capacitor C12 (104) and a bleeder resistor R15 (10K), and a photo coupler U3 (EL 1019).
In some implementations, the PWM pulse width control circuit includes a switching power supply master control chip U2 (DK 124/24W) and a start capacitor C10 (10 UF).
In some implementations, the positive and negative electrostatic discharge circuit includes a safety capacitor CY4 (102), a varistor MOV2 (7 d 471) and a current limiting resistor R16 (10M).
In some implementations, the positive and negative static discharge circuit includes a bidirectional forward voltage suppression diode TVS1 (SMF 30 CA), a safety Y-capacitor CY4 (102) and a current limiting resistor R16 (10M).
One or more embodiments of the present utility model can provide at least the following advantages:
the accumulated static electricity on the secondary side is led out through the static electricity discharge circuit, so that the switching power supply is prevented from being damaged by static discharge caused by excessively high static voltage, the stable long-time operation of the switching power supply of the negative ion generator can be realized, and a reliable switching power supply is provided for the stable operation of the negative ion generator. Because the bleeder circuit exists, the safety accident caused by electrostatic discharge is avoided, and therefore, the switch power supply of the negative ion generator has higher safety.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the positive static electricity generation of the secondary side of a negative ion generator single electrode mode switching power supply in an embodiment of the present utility model;
FIG. 2 is a schematic diagram of positive and negative static electricity generation on the secondary side of a negative electrode mode switching power supply of a negative ion generator in an embodiment of the present utility model;
fig. 3 is a schematic diagram of a switching power supply of a TVS-R-C type negative ion generator according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a switching power supply of an MOV-R-C type negative ion generator according to an embodiment of the present utility model;
fig. 5 is a schematic circuit block diagram of a switching power supply of a negative ion generator according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a switching power supply of an MOV-R-C type negative ion generator according to an embodiment of the present utility model;
fig. 7 is a schematic diagram of a switching power supply of a VS-R-C type negative ion generator according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
The utility model provides a switching power supply circuit of a negative ion generator, which overcomes the technical defect that the normal function of the switching power supply is destroyed by destroying electronic elements due to strong electrostatic discharge in the existing switching power supply of the negative ion generator, can realize the stable long-time operation of the switching power supply of the negative ion generator, and provides the switching power supply of the stable negative ion generator.
During operation of the negative ion generator (single electrode mode) (as shown in fig. 1), air is ionized, and positive and negative ions are generated; the negative ions generate an ion wind principle high-voltage end under the action of negative high-voltage electric field force; positive charges are absorbed by the negative high-voltage end to form positive static electricity, and the positive static electricity is led into the secondary side of the switching power supply transformer through electric connection. The secondary side and the primary side are electrically isolated by the transformer, so that static electricity of the secondary side is accumulated, static electricity is discharged adjacent to welding spots to a certain extent, electronic elements are damaged, a switching power supply is disabled, and the operation of the negative ion generator is stopped.
During operation of the negative ion generator (positive and negative electrode mode) (as shown in fig. 2), air is ionized, and positive and negative ions are generated; the negative ions migrate to the ground end GND under the action of negative high-voltage electric field force and are adsorbed to form negative static electricity; positive charges are absorbed by the negative high-voltage end to form positive static electricity, and the positive static electricity is led into the secondary side of the switching power supply transformer through electric connection. The secondary side and the primary side are electrically isolated by the transformer, so that static electricity of the secondary side is accumulated, static electricity is discharged adjacent to welding spots to a certain extent, electronic elements are damaged, a switching power supply is disabled, and the operation of the negative ion generator is stopped.
The switching power supply of the negative ion generator needs to additionally design an electrostatic discharge circuit to realize the elimination of static electricity so as to ensure that the switching power supply works stably.
The utility model discloses anion generator's switching power supply provides two kinds of bleeder circuits, and an embodiment is as shown in fig. 3 and is TVS-R-C static bleeder circuit scheme, and the high pressure that the static of secondary side formed makes in order the work of voltage diode TVS in breakdown zone, switches on the bleeder circuit, makes the static of secondary side through the primary side release to electric wire netting ground or electric wire netting in.
Another embodiment is shown in fig. 4, which is a MOV-R-C electrostatic discharge circuit scheme, where the high voltage formed by the static electricity on the secondary side reduces the resistance of the varistor, and the discharge loop is conducted, so that the static electricity on the secondary side is discharged to the ground or the grid through the primary side.
Embodiment one:
fig. 5 shows a schematic circuit block diagram of a switching power supply of a negative ion generator, and as shown in fig. 5, the switching power supply of a negative ion generator provided in this embodiment includes:
the switching power supply comprises a lightning protection unit, an EMI circuit, a primary side rectifying and filtering circuit, a power conversion circuit, a secondary side rectifying and filtering circuit, a voltage sampling circuit, a voltage feedback circuit, a PWM pulse width control circuit and a positive and negative static discharge circuit;
the voltage sampling circuit is connected with the PWM pulse width control circuit through the voltage feedback circuit, the output end of the PWM pulse width control circuit is connected with the input end of the power conversion circuit, and the output end of the voltage feedback circuit is connected with the input end of the PWM pulse width control circuit;
the lightning protection unit is connected with the power conversion circuit through the EMI circuit and the primary side rectifying and filtering circuit in sequence, and the power conversion circuit is connected with the lightning protection unit through the positive and negative static discharge circuit;
the power conversion circuit is connected with the negative ion generator and the voltage sampling circuit through the secondary side rectifying and filtering circuit, and the input end of the voltage sampling circuit is connected with the output end of the secondary side rectifying and filtering circuit;
the positive and negative static electricity bleeder circuit is connected with the secondary side rectifying and filtering circuit in parallel;
when the novel power switch is used, 220V alternating current mains supply is protected by the lightning protection unit and filtered by the EMI circuit, and then 310V direct current voltage is formed by the rectifying and filtering circuit and enters the primary end of the three-winding transformer.
After passing through the power conversion circuit, one secondary winding output is low-voltage alternating voltage, and after being rectified by the secondary side rectifying and filtering circuit, the direct current 12V low voltage is output for the negative ion generator. The other secondary winding is also rectified and filtered and is stabilized by a stabilizing tube to output low-power 12V direct-current voltage.
Two paths of signals are led out from the power supply end of the negative ion generator, one path is used for supplying power to the sampling resistor, and the sampling voltage is changed along with the change of the output voltage so as to influence the input voltage of the voltage stabilizing control chip. The other path is the power supply of the light diode and the voltage stabilizing control chip of the photoelectric coupler. When the input voltage of the voltage stabilizing control chip is increased along with the increase of the switching voltage, the output voltage of the voltage stabilizing control chip is increased, and then the current of the light emitting diode is reduced, so that the light emitting quantity of the light emitting diode is reduced. The receiving end of the optocoupler reduces the conduction quantity of the corresponding triode due to the reduction of luminous flux, and the voltage fed back to the PWM chip increases, so that the chip can reduce the PWM pulse width, thereby reducing the input voltage of the power conversion circuit and further reducing the output voltage of the switching power supply, so that the fluctuation of the voltage of the output end is weakened, and the output voltage of the switching power supply is stabilized.
The positive and negative static electricity absorbed during the working period of the negative ion generator enters a secondary side circuit of the switching power supply through electrical connection; the first scheme is that the TVS diode connected across the secondary side circuit GND and the zero line end breaks down positively/reversely due to the fact that the electrostatic voltage exceeds a threshold value, the voltage changes, and positive/negative static electricity is discharged. The current limiting resistor is used for limiting the value of the discharge current to be below the safety regulation value; and in the scheme II, the piezoresistor connected across the secondary side circuit GND and the zero line end reduces the resistance value due to extremely high positive/negative static voltage, and opens a release passage.
Static electricity discharged to the zero line end is equivalent to discharging to the whole power grid. Since the grid is similarly a very powerful capacitor, low power static electricity is insignificant for its carrying capacity. If optional, the bleed is preferentially to the ground of the grid.
In some implementations, the lightning protection unit includes a 1A voltage-resistant fuse (F1), a varistor (MOV 1), and a thermistor (TH 1):
the voltage dependent resistor is connected between the live wire L and the zero line N in parallel, the 1A voltage resistant fuse is connected on the live wire L in series, and the thermistor is connected on the zero line N in series;
preferably, the preferred model of the piezoresistor is 7d471, and the preferred model of the thermistor is NTC2R55.
In some implementations, the EMI circuit includes a common mode inductance (LF 1), a pair of safety Y capacitors (CY 1 and CY 2) and an X capacitor (CX 1), and a bleed resistor:
the safety Y capacitors (CY 1 and CY 2) are connected in parallel in pairs between the zero line and the live line;
the X capacitor (CX 1) and the bleeder resistor are connected in parallel between the zero line and the live line.
The common mode inductors (LF 1) are connected in series between the zero line and the live line in pairs;
the safety Y capacitors are preferably 102 in type and are connected in parallel between the zero line and the live line in pairs. The X capacitor is preferably 0.1U and is connected in parallel between the zero line and the live line. The bleeder resistor is preferably 650K. The common mode inductance is preferably 5mH.
In some implementations, the primary side rectifying and filtering circuit includes a rectifying bridge circuit BD1 and a capacitive-inductive pi-type filtering circuit (LC pi-type).
Preferably, the type of the rectifier bridge is ABS210, the filter capacitor is 10UF, and the inductance is 1mH.
In some implementations, the power conversion circuit includes a spike voltage absorption loop and a three-winding transformer:
the peak voltage absorbing circuit comprises a peak voltage absorbing circuit of a primary side and a peak voltage absorbing circuit of a secondary side; preferably, the three-winding transformer is preferably of the type PQ2620;
the primary side peak voltage absorption circuit is formed by connecting resistors R3 and R2 (100K) and a high-voltage ceramic capacitor C3 (220/1 KV) in parallel and then connecting the resistors with the two ends of a primary side winding in series, and the secondary side peak voltage absorption circuit is formed by connecting a resistor R7 (20R) and a ceramic capacitor C7 (471/200V) in series and then connecting the resistor R7 (20R) and the ceramic capacitor C7 in parallel with a filter diode D3. The secondary side rectifying and filtering circuit comprises a half-bridge filtering diode D3 (SS 310), and a capacitive-inductive pi-type filtering circuit (LC pi-type). The filter capacitor in the LC pi-type filter circuit is preferably 680UF, and the inductance is preferably 1mH.
In some implementations, the voltage sampling circuit includes a pull-down divider resistor R12 (2K) and an adjustable divider resistor RT1 (5K), and pull-up divider resistors R10 (100R) and R11 (15K).
In some implementations, the voltage feedback circuit includes a voltage stabilizing control chip U4 (AZ 431), a compensation capacitor C12 (104) and a bleeder resistor R15 (10K), and a photo coupler U3 (EL 1019).
In some implementations, the PWM pulse width control circuit includes a switching power supply master control chip U2 (DK 124/24W) and a start capacitor C10 (10 UF).
The utility 220V is input to the primary side of the switching power supply via the CON1 terminal. The lightning protection unit comprises a 1A fuse F1 and has a current protection function. The inductance of the primary side just powered on can generate extremely high reverse voltage, the current in the circuit is small at the moment, the resistance value of the thermistor TH1 is large, the thermistor TH1 can serve as an energy absorption resistor, and the magnetic energy of the inductance is converted into resistance heat, so that the absorption function of the instantaneous spike voltage of the power on is realized.
Meanwhile, the piezoresistor MOV1 can also play a role in absorbing instantaneous spike voltage and has a lightning stroke protection function. The mains supply forms preliminary filtering through a common mode inductor LF1, a pair of parallel safety Y capacitors (CY 1 and CY 2) and a safety X capacitor, and differential mode and common mode interference signals in the mains supply are filtered. After passing through the rectifier bridge BD1, the voltage signal is changed into a direct current 310V voltage signal, and then the direct current 310V voltage signal is subjected to primary side LC pi filtering to generate a stable direct current voltage signal, and the stable direct current voltage signal is input to a primary side input end of a three-winding transformer T1 (PQ 2620).
The primary side 310V voltage is introduced into a PWM control chip U2 (DK 124/24W) to enable the chip to start and output PWM signals, and the primary side transformer winding is conducted discontinuously, so that alternating low-voltage signals are generated on the secondary side.
The stable low-voltage direct current signal is formed through rectification of a secondary side (half-wave rectification D2, peak voltage absorption capacitor C4 and bleeder resistor R4) and LC pi-type filtering.
In order to prevent static electricity generated by the negative ion generator from being led into other electronic control circuits, the power supply of the other control circuits is electrically isolated from the negative ion generator, so that another secondary side winding is needed to provide stable low-voltage power supply. Therefore, the low voltage of the other winding generates stable +12V voltage power supply after being stabilized by the voltage stabilizing U1 (7812) and the filter capacitor C6, and is connected to the terminal CON 2. R6 is the bleeder resistance of C6.
The CON3 terminal is used for supplying power to the anion generator, and the corresponding secondary winding voltage is led out to two paths after rectification and filtration, and one path of sampling resistor R12 and adjustable sampling resistor RT1 are used for supplying power. The sampling partial pressure can be regulated by 2.2-3.8V.
When the supply voltage of the negative ion generator is lower than 12V, the sampling voltage is reduced, the voltage stabilizing control chip U4 (AZ 431) is controlled to reduce the output voltage so that the light flux of the light diode of the optical coupler U3 (EL 1019) is reduced, the load of the FB end of the switching power supply main control chip U2 is increased, the voltage of the rear FB side is reduced, the pulse width of PWM is increased by U2, and therefore the primary measured input voltage of the transformer T1 is improved, and then the value of the secondary output voltage is improved, so that the voltage stable output of the CON3 end is realized.
The positive and negative static electricity input by the negative ion generator at the CON3 end generates static high voltage at the secondary side to enable the forward voltage diode TVS1 to work in a breakdown area to conduct a static electricity discharge circuit, so that static electricity at the secondary side of the CON3 is led into a ground end or a power grid.
Embodiment two:
fig. 6 shows a schematic diagram of a switching power supply circuit of an MOV-R-C type negative ion generator, and as shown in fig. 6, the positive and negative static discharge circuit includes a safety capacitor CY4 (102), a varistor MOV2 (7 d 471) and a current-limiting resistor R16 (10M) on the basis of the first embodiment.
The MOV2 is connected with the R16 in series and then connected with the CY4 in parallel, and is connected with the ground section of the input source of the negative ion generator and the zero line end of 220V mains supply in a bridging manner;
because positive and negative static electricity absorbed during the working period of the negative ion generator enters the secondary side circuit of the switching power supply through electric connection, TVS diodes connected across the secondary side circuit GND and the zero line end break down positively/reversely due to the fact that the static voltage exceeds a threshold value, the voltage keeps changing, and the positive/negative static electricity is discharged. The current limiting resistor acts to limit the value of the bleed current below the safety value.
Embodiment III:
fig. 7 shows a schematic diagram of a switching power supply circuit of a VS-R-C type negative ion generator, and as shown in fig. 7, the positive and negative static electricity discharge circuit includes a bidirectional forward voltage suppression diode TVS1 (SMF 30 CA), a safety Y capacitor CY4 (102) and a current limiting resistor R16 (10M) on the basis of the first embodiment.
The TVS1 is connected with the R16 in series and then connected with the CY4 in parallel, and is connected with the ground end of the input source of the negative ion generator and the zero line end of 220V mains supply (or the ground end of the mains supply).
The positive and negative static electricity absorbed during the working of the negative ion generator enters the secondary side circuit of the switching power supply through electric connection.
In the several embodiments provided in the embodiments of the present utility model, it should be understood that the disclosed system and method may be implemented in other manners. The system and method embodiments described above are merely illustrative.
It should be noted that, in this document, the terms "first," "second," and the like in the description and the claims of the present utility model and the above drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although the embodiments of the present utility model are described above, the embodiments are only used for facilitating understanding of the present utility model, and are not intended to limit the present utility model. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.
Claims (10)
1. The switching power supply circuit of the anion generator is characterized by comprising a lightning protection unit, an EMI circuit, a primary side rectifying and filtering circuit, a power conversion circuit, a secondary side rectifying and filtering circuit, a voltage sampling circuit, a voltage feedback circuit, a PWM pulse width control circuit and a positive and negative static discharge circuit;
the voltage sampling circuit is connected with the PWM pulse width control circuit through the voltage feedback circuit, the output end of the PWM pulse width control circuit is connected with the input end of the power conversion circuit, and the output end of the voltage feedback circuit is connected with the input end of the PWM pulse width control circuit;
the lightning protection unit is connected with the power conversion circuit through the EMI circuit and the primary side rectifying and filtering circuit in sequence, and the power conversion circuit is connected with the lightning protection unit through the positive and negative static discharge circuit;
the power conversion circuit is connected with the negative ion generator and the voltage sampling circuit through the secondary side rectifying and filtering circuit, and the input end of the voltage sampling circuit is connected with the output end of the secondary side rectifying and filtering circuit;
the positive and negative static electricity bleeder circuit is connected with the secondary side rectifying and filtering circuit in parallel.
2. The switching power supply circuit according to claim 1, wherein the lightning protection unit comprises a voltage-resistant fuse, a varistor, and a thermistor:
the voltage dependent resistor is connected in parallel between the live wire L and the zero line N, the voltage resistant fuse is connected in series on the live wire L, and the thermistor is connected in series on the zero line N.
3. The switching power supply circuit of claim 1 wherein said EMI circuit comprises a common mode inductance, a pair of safety Y and X capacitors and a bleed resistor:
the safety Y capacitors are connected in parallel between the zero line and the live line in pairs;
the X capacitor and the bleeder resistor are connected in parallel between the zero line and the live line,
the common mode inductors are connected in series in pairs between the zero line and the fire line.
4. The switching power supply circuit according to claim 1, wherein the primary side rectifying and filtering circuit comprises a rectifying bridge circuit BD1 and a capacitive-inductive pi-type filtering circuit.
5. The switching power supply circuit of claim 1 wherein said power conversion circuit comprises a spike voltage absorption loop and a three winding transformer:
the peak voltage absorbing circuit comprises a peak voltage absorbing circuit of a primary side and a peak voltage absorbing circuit of a secondary side.
6. The switching power supply circuit according to claim 1, wherein the voltage sampling circuit includes a pull-down voltage dividing resistor R12 and an adjustable voltage dividing resistor RT1, and a pull-up voltage dividing resistor.
7. The switching power supply circuit according to claim 1, wherein the voltage feedback circuit comprises a voltage stabilizing control chip, a compensation capacitor, a bleeder resistor and a photocoupler.
8. The switching power supply circuit according to claim 1, wherein the PWM pulse width control circuit comprises a switching power supply main control chip and a start capacitor.
9. The switching power supply circuit according to any one of claims 1 to 8, wherein the positive and negative electrostatic discharge circuits include a safety capacitor, a varistor and a current limiting resistor.
10. The switching power supply circuit according to any one of claims 1 to 8, wherein the positive and negative electrostatic discharge circuits include a bidirectional forward voltage suppressing diode, a ballast capacitor and a current limiting resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320222948.6U CN220107819U (en) | 2023-02-03 | 2023-02-03 | Switch power supply circuit of anion generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320222948.6U CN220107819U (en) | 2023-02-03 | 2023-02-03 | Switch power supply circuit of anion generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220107819U true CN220107819U (en) | 2023-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320222948.6U Active CN220107819U (en) | 2023-02-03 | 2023-02-03 | Switch power supply circuit of anion generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220107819U (en) |
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2023
- 2023-02-03 CN CN202320222948.6U patent/CN220107819U/en active Active
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