CN215186445U

CN215186445U - AC power supply for ozone generator

Info

Publication number: CN215186445U
Application number: CN202121151005.6U
Authority: CN
Inventors: 刘湘安
Original assignee: Guangzhou Qili Environmental Equipment Co ltd
Current assignee: Guangzhou Qili Environmental Equipment Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-12-14
Anticipated expiration: 2031-05-26

Abstract

The application discloses alternating current power supply that ozone generator used relates to the power technology, includes: the driving board is used for driving the primary circuit and comprises a first PCB, a patch component and a first connector, wherein the patch component is mounted on the first PCB and used for realizing the function of the driving board; the second PCB is used for installing the alternating current-direct current conversion module and the power output circuit, devices in the alternating current-direct current conversion module and devices in the power output circuit are all achieved through direct insertion type elements, a second connector is arranged on the second PCB, the second connector is used for being installed in a matched mode with the first connector, so that the driving board is fixed on the second PCB and connected with the power output circuit, and the first PCB is perpendicular to the second PCB. The volume of the high-voltage alternating-current power supply can be reduced.

Description

AC power supply for ozone generator

Technical Field

The application relates to a power supply technology, in particular to an alternating current power supply for an ozone generator.

Background

In some disinfection plants, ozone is produced, and therefore an ozone generator is provided, which is used to produce ozone gas (O)₃) The apparatus of (1). Ozone is easy to decompose and cannot be stored, and the ozone needs to be prepared on site for use (the ozone can be stored for a short time under special conditions), so that an ozone generator is needed to be used in all places where the ozone can be used. The ozone generator is widely applied to the fields of drinking water, sewage, industrial oxidation, food processing and fresh keeping, medicine synthesis, space sterilization and the like.

The ozone generator needs to generate high voltage when preparing ozone, a high-voltage power supply needs to adopt a radiator, a capacitor and other devices with larger volume, and the power supply has larger volume.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application aims to: an AC power supply for an ozone generator is provided which can reduce the unit volume.

The embodiment of the application provides:

an alternating current power supply for an ozone generator comprising:

the alternating current-direct current conversion module is used for converting commercial power into direct current;

the power output circuit comprises a primary circuit and a secondary circuit, the primary circuit and the secondary circuit are isolated through a transformer, the primary circuit is used for controlling the secondary circuit, and the secondary circuit obtains power from the direct current output by the alternating current-direct current conversion module;

the driving board is used for driving the primary circuit and comprises a first PCB, a chip component and a first connector, wherein the chip component is installed on the first PCB and used for realizing the function of the driving board;

the second PCB is used for installing the alternating current-direct current conversion module and the power output circuit, devices in the alternating current-direct current conversion module and devices in the power output circuit are all achieved through direct insertion type elements, a second connector is arranged on the second PCB, the second connector is used for being installed in a matched mode with the first connector, so that the driving board is fixed on the second PCB and connected with the power output circuit, and the first PCB is perpendicular to the second PCB.

In some embodiments, the drive plate further comprises an insulating housing removably sleeved over the drive plate.

In some embodiments, the number of the first connector and the second connector is at least two;

the first connector is a pin header and the second connector is a pin header, or the first connector is a pin header and the second connector is a pin header.

In some embodiments, the drive board further comprises an auxiliary power supply for providing one or more of 3.3V, 5V, 9V, 12V, 15V dc power, the auxiliary power supply being for supplying power to the drive board.

In some embodiments, the ac-dc conversion module includes an anti-surge unit and a rectifying and filtering unit, an input end of the anti-surge unit is used for accessing ac power, an output end of the anti-surge unit is connected with an input end of the rectifying and filtering unit, and an output end of the rectifying and filtering unit is used for outputting dc power;

the anti-surge unit comprises a negative temperature coefficient thermistor and a normally open relay, wherein a controlled end of the normally open relay is opened in a non-power-on state, a controlled end of the normally open relay is closed in a power-on state, the controlled end of the normally open relay is connected with the negative temperature coefficient thermistor in parallel, and the negative temperature coefficient thermistor is connected between an input end and an output end of the anti-surge unit;

the auxiliary power supply is used for supplying power to the normally open relay, and the auxiliary power supply obtains electricity through alternating current input of the alternating current-direct current conversion module.

In some embodiments, the power output circuit is a push-pull output circuit.

In some embodiments, the secondary circuit further comprises an overcurrent detection unit, wherein the overcurrent detection unit is used for detecting the output current of the secondary circuit, and when overcurrent protection is generated by the overcurrent detection circuit, a first level is output;

the driving plate is provided with a shutdown detection pin, and the shutdown detection pin is triggered by a first level;

and the output end of the over-current detection unit is connected with the shutdown detection pin.

In some embodiments, the over-current detection unit includes a sampling circuit, a comparison circuit, and an over-current signal output circuit;

the sampling circuit comprises a current transformer, a rectifier bridge and a filter capacitor, wherein the current transformer is used for sensing the output current of the secondary circuit and inputting an alternating current signal to the input end of the rectifier bridge, and the filter capacitor is connected to the output end of the rectifier bridge;

the comparison circuit is used for comparing the voltage on the filter capacitor with the reference voltage so as to control the output level of the overcurrent signal output circuit.

In some embodiments, the overcurrent signal output circuit includes a thyristor, a current-limiting resistor, an indicator light, and an isolation diode, the positive electrode of the thyristor is connected to a high level, the negative electrode of the thyristor is connected to the positive electrode of the indicator light through the current-limiting resistor, the negative electrode of the indicator light is grounded, the gate electrode of the thyristor is connected to the output terminal of the comparison circuit, the positive electrode of the isolation diode is connected to the negative electrode of the thyristor, and the negative electrode of the isolation diode is connected to the shutdown detection pin.

In some embodiments, the system further comprises a buzzer alarm circuit, a control end of the buzzer alarm circuit is connected with the shutdown detection pin, and the buzzer alarm circuit is triggered by the first level.

In the embodiment of the application, the patch type device of the driving board is arranged on the first PCB, and the alternating current-direct current conversion module and the power output circuit are both realized by the direct insertion type element due to the requirement of higher voltage resistance and current characteristics and are arranged on the second PCB, so that the direct insertion type element and the patch type element can be separated, the welding process is convenient to implement, the mixed use of different welding processes is realized, and the volume of a power supply is reduced; meanwhile, the first PCB and the second PCB are mounted in a vertical mode, and the size of the power supply is further reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a block diagram of an AC power supply for an ozone generator according to an embodiment of the present invention;

FIG. 2 is a schematic view of a partial structure (in front view) of an AC power supply for an ozone generator according to an embodiment of the present invention;

FIG. 3 is a schematic view (in a plan view) of another partial structure of an AC power supply for an ozone generator according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a driving board, a power output circuit and a sampling circuit provided in an embodiment of the present application;

FIG. 5 is a schematic diagram of a comparison circuit, an over-current signal output circuit and a pulse width control circuit provided in the embodiment of the present application;

fig. 6 is a schematic diagram of an ac-dc conversion module and an auxiliary power supply according to an embodiment of the present disclosure;

fig. 7 is a schematic diagram of a buzzer alarm circuit provided in an embodiment of the present application.

Detailed Description

In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below through embodiments with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1, 2 and 3, the present embodiment discloses an ac power supply for an ozone generator, comprising:

the driving board is used for driving the primary circuit, and comprises a first PCB 110, a chip component 111 mounted on the first PCB 110 and used for realizing the function of the driving board, and a first connector 112;

the second PCB 120 is configured to mount the ac-dc converter module and the power output circuit, the ac-dc converter module and the power output circuit are implemented by directly-inserted components (such as a capacitor 122 and a heat sink 123 in fig. 3), a second connector is disposed on the second PCB 120, the second connector 121 is configured to be mounted in cooperation with the first connector 112, so that the driving board is fixed on the second PCB 120 and connected to the power output circuit, and the first PCB 110 is perpendicular to the second PCB 120.

It should be understood that the PCB board of the present embodiment includes a board body and a printed circuit. In this embodiment, the structure of the power supply is mainly improved, and therefore, the specific structure of the driving board is not limited. In the present application, the main function of the driving board is to send a driving signal to the primary circuit, so that the secondary circuit chops or inverts the high-voltage direct current output by the ac-dc conversion module based on the electromagnetic signal of the primary circuit, thereby outputting the high-voltage alternating current. Therefore, the driving board only needs to have the functions of outputting PWM waves, stopping according to feedback signals and adjusting pulse widths according to the feedback signals, the functions can be realized by the conventional power control chip and peripheral circuits thereof, and the specific circuit of the driving board belongs to the prior art.

The first connector and the second connector referred to in the present embodiment may be common connectors such as a plug, a socket, a pin header, and the like. An easily pluggable connector is preferred, which facilitates replacement of the drive board.

In order to avoid the generation of high-voltage arcs and break down the non-voltage-withstanding chip device, in some embodiments, the chip device further comprises an insulating shell, and the insulating shell is detachably sleeved on the driving plate.

In order to make the driving board more firmly mounted on the power supply, in some embodiments, the number of the first connector and the second connector is at least two. The first connector is a pin header and the second connector is a pin header, or the first connector is a pin header and the second connector is a pin header. For example, two pin header seats can be arranged at two ends of one side of the first PCB, so that stress points can be increased, and the stability is improved.

On one hand, the pin header and the pin header seat have small volume and are easy to install; on the other hand, the mode of adopting a plurality of connectors can increase the firm degree of drive plate.

In the following embodiments, a specific circuit configuration of the above ac power supply is disclosed. In the embodiment, the driving board, the auxiliary power supply, the alternating current/direct current conversion unit, the buzzer alarm circuit, the power output circuit and the like are involved.

The auxiliary power supply is used for providing one or more of 3.3V, 5V, 9V, 12V and 15V direct current power supplies, and the auxiliary power supply is used for supplying power to the driving plate. Referring to fig. 6, in the present embodiment, the auxiliary power supply U5 supplies 15V power and is then converted into 12V dc power through the regulator chip U2. The embodiment adopts multi-voltage power supply, and can meet the power consumption requirements of different parts.

the anti-surge unit comprises a negative temperature coefficient thermistor NTC1 and a normally open relay K1, wherein a controlled end (namely pins 2 and 5 of K1) of the normally open relay K1 is opened in a non-power-on state, a controlled end of the normally open relay K1 is closed in a power-on state, a controlled end of the normally open relay K1 is connected in parallel with the negative temperature coefficient thermistor NTC1, and the negative temperature coefficient thermistor NTC1 is connected between an input end and an output end of the anti-surge unit;

Referring to fig. 4, in the present embodiment, the primary circuit is formed by the primary side of the transformer T1, and the secondary circuit is formed by the secondary side of the transformer T1, the resistor R5, the resistor R6, the voltage regulators D3 to D6, the resistor R28, the resistor R29, the power transistor Q1, and the power transistor Q2. In the embodiment, the power output circuit is a push-pull output circuit.

And the drive board U1 is used for driving the primary circuit, and is provided with a halt detection pin BJ which is triggered by a first level. Referring to fig. 4, in the present embodiment, U1 is a driving board for outputting a driving signal between OUT _ a and OUT _ B to drive the power transistor Q1 and the power transistor Q2 to operate, thereby outputting power to a subsequent circuit. Under the action of the driving plate, the power tube Q1 and the power tube Q2 work alternately to output alternating current waveforms. The present embodiment uses a push-pull output circuit to increase power, and the transformer T1 is used to isolate the high voltage from the low voltage.

And the overcurrent detection unit is used for detecting the output current of the secondary circuit, the output end of the overcurrent detection unit is connected with the stop detection pin, and the overcurrent detection circuit outputs a first level (high level or low level) when overcurrent protection is generated.

Referring to fig. 4 and 5, in the present embodiment, the over-current detection unit includes a sampling circuit, a comparison circuit, and an over-current signal output circuit;

the sampling circuit comprises a current transformer T3, a rectifier bridge (composed of diodes D11-D14) and a filter capacitor C12, in this embodiment, the current transformer is further connected with a resistor R16, the current transformer T3 is used for sensing the output current of the secondary circuit and inputting an alternating current signal to the input end of the rectifier bridge, and the filter capacitor is connected to the output end of the rectifier bridge; since the secondary circuit outputs alternating current, the output signal of the current transformer T3 needs to be rectified, and after passing through the filter capacitor C12, the current detected by the current transformer T3 is converted into voltage, i.e., voltage of the point ZDK _ V to ground.

The comparison circuit is used for comparing the voltage on the filter capacitor with the reference voltage so as to control the output level of the overcurrent signal output circuit. IN the present embodiment, after the voltage of the point ZDK _ V to ground is divided by the resistor R15 and the resistor R17, the voltage is compared by the first operational amplifier (involving the 1IN-, 1IN +, and 1OUT pins) IN the dual operational amplifier U3 with the reference voltage generated by the adjustable resistor RP3, so that the comparison result is output through the 1OUT pin of the dual operational amplifier U3.

In this embodiment, the overcurrent signal output circuit includes a thyristor Q5, a current-limiting resistor R20, a resistor R27, an indicator light LED5, and an isolation diode D15, the positive electrode of the thyristor Q5 is connected to a high level (12V in this embodiment), the negative electrode of the thyristor Q5 is connected to the positive electrode of the indicator light LED5 through the current-limiting resistor R20, the negative electrode of the indicator light LED5 is grounded, the gate of the thyristor Q5 is connected to the output terminal of the comparison circuit, the positive electrode of the isolation diode D15 is connected to the negative electrode of the thyristor Q5, and the negative electrode of the isolation diode D15 is connected to the stop detection pin BJ.

It can be seen that, IN this embodiment, when the output current of the secondary circuit is too large, the voltage of ZDK _ V is increased, and further the voltage of the 1IN + pin of the dual operational amplifier U3 is greater than the voltage of the 1 IN-pin, so that the 1OUT pin is changed from a low level to an output high level, and the thyristor Q5 is enabled to be turned on, the indicator light LED5 is turned on, the shutdown detection pin BJ is at a high level, and the driver board is triggered to shutdown.

Referring to fig. 4 and 5, IN some embodiments, the pulse width adjusting circuit is further included, and the pulse width adjusting circuit is composed of an optical coupler U4, a resistor R19, an adjustable resistor RP4 and a capacitor C13, wherein the adjustable resistor RP4 is used for dividing ZDK _ V, the second operational amplifier (involving pins 2IN +, 2IN-, and 2 OUT) of the dual operational amplifier U3 forms a voltage follower, when the voltage of ZDK _ V to ground is increased, the primary voltage of the optical coupler is increased, the resistance of the secondary is decreased, the point CORE _ TK is connected to pin 7 of the driving board U1, and the driving board U1 changes the pulse width of the output driving signals (the driving signals of OUT _ a and OUT _ B) according to the magnitude of the external resistor of pin 7. In the embodiment, an adjustable resistor PR1, a socket J12 for accessing the adjustable resistor TK2 and a resistor R8 are connected to the 7 th pin of the driving board U1, and as can be seen, a series-parallel circuit of the adjustable resistor PR1, the adjustable resistor TK2 and the resistor R8 is connected in parallel with the resistor of the secondary side of the optical coupler to form an external resistor of the 7 th pin of the driving board U1. A group closed loop control can be formed by the above arrangement.

Referring to fig. 6, in this embodiment, since the auxiliary power supply and the surge protection unit both take power from the same ac power, only when the auxiliary power supply enters the operating state, the relay is switched on when the auxiliary power supply wants to supply power, thereby realizing delayed switching. And the negative temperature coefficient thermistor NTC1 can play the role of preventing surge, and avoid overlarge instantaneous current. When the relay is closed, the negative temperature coefficient thermistor NTC1 is short-circuited, and the power consumption is reduced. Further, as can be seen from fig. 6, the anti-surge circuit further includes a diode D7, a resistor R9, a thyristor Q3, a resistor R10, an indicator LED1, a resistor R11, and a capacitor C4.

The alternating current-direct current conversion module further comprises a rectifying and filtering unit, wherein the rectifying and filtering unit comprises safety capacitors C9 and C10, a conjugate inductor L1, a rectifier bridge D1, a capacitor C2, a capacitor C3, a capacitor C8 and a resistor R1. The alternating current-direct current conversion module converts 220V alternating current into 308V direct current. It is understood that the present embodiment includes, for example, a fuse F1, ac access terminals J1, J10, and the like.

Referring to fig. 7, in some embodiments, the apparatus further includes a buzzer alarm circuit, a control terminal of the buzzer alarm circuit is connected to the shutdown detection pin, and the buzzer alarm circuit is triggered by the first level.

In this embodiment, the BUZZER alarm circuit mainly includes a resistor R22, a resistor R23, a capacitor C14, a resistor R21, a triode Q4, and a BUZZER 1. In this embodiment, when the BUZZER alarm circuit is connected to the stop detection pin BJ, i.e., when the stop is triggered, the transistor Q4 is turned on, and the BUZZER1 generates a sound.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. An alternating current power supply for an ozone generator, comprising:

the driving board is used for driving the primary circuit and comprises a first PCB, a first connector and a chip component mounted on the first PCB;

2. The alternating current power supply for the ozone generator as claimed in claim 1, further comprising an insulating housing detachably sleeved on the driving plate.

3. The ac power supply for an ozone generator as claimed in claim 1, wherein the number of said first connector and said second connector is at least two;

4. An AC power supply for an ozone generator as claimed in claim 1 further comprising an auxiliary power supply for providing one or more of 3.3V, 5V, 9V, 12V, 15V DC power, said auxiliary power supply for supplying power to said drive plate.

5. The alternating current power supply for the ozone generator as claimed in claim 4, wherein the alternating current-direct current conversion module comprises an anti-surge unit and a rectifying and filtering unit, an input end of the anti-surge unit is used for connecting alternating current, an output end of the anti-surge unit is connected with an input end of the rectifying and filtering unit, and an output end of the rectifying and filtering unit is used for outputting direct current;

6. An AC power supply for an ozone generator as claimed in claim 1 wherein the power output circuit is a push-pull output circuit.

7. The ac power supply for an ozone generator as claimed in claim 1, further comprising an overcurrent detecting unit for detecting an output current of the secondary circuit, wherein the overcurrent detecting circuit outputs a first level when overcurrent protection is generated;

8. The alternating current power supply for the ozone generator as claimed in claim 7, wherein the over current detection unit comprises a sampling circuit, a comparison circuit and an over current signal output circuit;

9. The ac power supply for ozone generator as claimed in claim 8, wherein said over-current signal output circuit comprises a thyristor, a current-limiting resistor, an indicator light and an isolating diode, wherein the positive pole of said thyristor is connected to high level, the negative pole of said thyristor is connected to the positive pole of said indicator light through said current-limiting resistor, the negative pole of said indicator light is grounded, the gate pole of said thyristor is connected to the output terminal of said comparison circuit, the positive pole of said isolating diode is connected to the negative pole of said thyristor, and the negative pole of said isolating diode is connected to said shutdown detection pin.

10. The alternating current power supply for the ozone generator as claimed in claim 9, further comprising a buzzer alarm circuit, wherein a control terminal of the buzzer alarm circuit is connected to the shutdown detection pin, and the buzzer alarm circuit is triggered by a first level.