CN218678852U - Power supply circuit board of coffee machine - Google Patents
Power supply circuit board of coffee machine Download PDFInfo
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- CN218678852U CN218678852U CN202223201111.8U CN202223201111U CN218678852U CN 218678852 U CN218678852 U CN 218678852U CN 202223201111 U CN202223201111 U CN 202223201111U CN 218678852 U CN218678852 U CN 218678852U
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Abstract
The utility model relates to a power supply circuit board of a coffee machine, which comprises a PCB board, wherein the PCB board is provided with a first insurance module, a second insurance module, a first filtering module, a second filtering module, a rectifying and filtering module, a plurality of photoelectric isolation modules and a plurality of silicon controlled switches; one end of the first insurance module is connected with an external power supply, and the other end of the first insurance module is respectively and electrically connected with the silicon controlled switches through the first filtering module; one end of the second safety module is connected with an external power supply, and the other end of the second safety module is sequentially connected with the second filtering module and the rectifying and filtering module in series; the 12V voltage output end is respectively connected with a plurality of photoelectric isolation modules, and the photoelectric isolation modules are correspondingly connected with a plurality of silicon controlled switches one by one. The coffee machine has the advantages that the number of parts and wiring wires can be reduced, the occupied space is reduced, the working procedures are simplified, the overall cost of the power circuit board is reduced, meanwhile, the interference among different circuit modules can be effectively isolated, the stability of output voltage is ensured, the stable control of the on-off of a load can be realized, and the stability and the reliability of the overall work of the coffee machine are further improved.
Description
Technical Field
The disclosure relates to the technical field of power supply circuits of coffee machines, in particular to a power supply circuit board of a coffee machine.
Background
At present, along with the diversification of coffee machine functions, the power supply demand is increased, the number of corresponding power modules is correspondingly increased, and the circuit modules have the advantages of large number of parts, scattered distribution, large occupied space, multiple wiring wires, complex process and high cost.
Moreover, a current power module of the coffee machine, such as a standardized power board of the coffee machine disclosed in patent CN209625033U, includes a circuit board, on which a main chip circuit, an AC-DC module, a driving load circuit, a temperature detection circuit, and a buzzer are integrated, and the main chip circuit is electrically connected with the AC-DC module, the driving load circuit, the temperature detection circuit, and the buzzer; the AC-DC module converts commercial power into 12V direct current for power supply; the built-in 5 v's of main chip circuit LDO output, built-in AD, the general output input GPIO port of PWM, built-in UART communication port, through the external key display board of UART communication port, for the key display board power supply, receive key display board's control instruction simultaneously, drive or close load output and buzzer output, because lack modules such as isolation between power and the load, filtering, lead to there being mutual interference between the part, influence output voltage's stability, also can influence load on-off control's stability simultaneously, influence coffee machine job stabilization nature and reliability.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the present disclosure is directed to a power circuit board of a coffee maker. This openly with each circuit module integration on a PCB board, reducible part quantity and wiring wire rod reduce occupation space, the simplified process reduces power supply circuit board overall cost, simultaneously through setting up filtering module, optoelectronic isolation module, can effectively keep apart the interference between the different circuit module, ensure that output voltage is stable to through silicon controlled rectifier switch, can realize the stable control of load break-make, and then improve coffee machine whole job stabilization nature and reliability.
The power supply circuit board of the coffee machine comprises a PCB, wherein a first insurance module, a second insurance module, a first filtering module, a second filtering module, a rectifying and filtering module, a plurality of photoelectric isolation modules and a plurality of silicon controlled switches are arranged on the PCB;
one end of the first insurance module is connected with an external power supply, and the other end of the first insurance module is respectively and electrically connected with the silicon controlled switches through the first filtering module;
one end of the second safety module is connected with an external power supply, and the other end of the second safety module is sequentially connected with the second filtering module and the rectifying and filtering module in series to form a 12V voltage output end and a 24V voltage output end;
the 12V voltage output end is respectively connected with the plurality of photoelectric isolation modules, the plurality of photoelectric isolation modules are correspondingly connected with the plurality of silicon controlled switches one by one, and the silicon controlled switches are used for being connected to a power supply end of a load.
Preferably, the first safety module is a 15A safety circuit, and the second safety module is a 4A safety circuit.
Preferably, the first filtering module and the second filtering module are both EMI \ EMC filtering circuits.
Preferably, the rectification filter module comprises a first power management unit, a second power management unit, a first driving circuit, a second driving circuit, a 12V high-frequency transformation circuit, a 24V high-frequency transformation circuit, a first filter circuit and a second filter circuit;
the second filter module is connected with the 12V voltage output end after being sequentially connected with the first power management unit, the first driving circuit, the 12V high-frequency voltage transformation circuit and the first filter circuit in series;
the second filtering module is connected with the second power management unit, the second driving circuit, the 24V high-frequency voltage transformation circuit and the second filtering circuit in series in sequence and then connected with the 24V voltage output end.
Preferably, the first power management unit and the second power management unit are both LD7575 power management units.
Preferably, the first driving circuit and the second driving circuit are both MOS transistor driving circuits.
Preferably, the first filter circuit and the second filter circuit are both LC filter circuits.
Preferably, the 12V voltage output end is connected with the plurality of optoelectronic isolation modules through a pin socket.
The power supply circuit board of the coffee machine has the advantages that:
1. according to the power supply circuit board, the circuit modules are integrated on the PCB, so that the number of circuit components and wiring wires can be reduced, the occupied space for installation is reduced, the wiring process is simplified, and the overall cost of the power supply circuit board is reduced;
2. this is openly through setting up filtering module and optoelectronic isolation module, can effectively keep apart between the different circuit module, and handles through rectification filtering, can provide stable output voltage to through silicon controlled switch, utilize silicon controlled switch response fast, reliability and the high characteristics of stability, can realize stable, the high-efficient control to the load break-make, and then improve coffee machine whole job stabilization nature and reliability.
Drawings
FIG. 1 is a block diagram of a power circuit board of a coffee maker according to the present embodiment;
fig. 2 is a circuit diagram of a power circuit board of the coffee maker according to the embodiment.
Description of reference numerals: 1-an external power supply, 2-a first insurance module, 3-a second insurance module, 4-a first filtering module, 5-a second filtering module, 6-a rectifying and filtering module, 61-a first power management unit, 62-a second power management unit, 63-a first driving circuit, 64-a second driving circuit, 65-12V high-frequency voltage transformation circuit, 66-24V high-frequency voltage transformation circuit, 67-a first filtering circuit, 68-a second filtering circuit, 7-a photoelectric isolation module, 8-a silicon controlled switch and 9-a pin socket.
Detailed Description
As shown in fig. 1, the power circuit board of the coffee maker according to the present disclosure includes a PCB, and a first safety module 2, a second safety module 3, a first filtering module 4, a second filtering module 5, a rectifying and filtering module 6, a plurality of photoelectric isolation modules 7, and a plurality of silicon controlled switches 8 are disposed on the PCB.
One end of the first insurance module 2 is connected with an external power supply 1, generally 110V-220V mains supply input, and the other end is respectively electrically connected with the plurality of silicon controlled switches 8 through the first filtering module 4, so as to filter the input voltage through the first filtering module 4, and provide a stable switching power supply for the silicon controlled switches 8.
One end of the second safety module 3 is connected with an external power supply 1, generally 110V-220V mains supply input, the other end of the second safety module is sequentially connected with the second filtering module 5 in series, and a 12V voltage output end and a 24V voltage output end are formed after the rectifying and filtering module 6 filters the external voltage input for the first time through the second filtering module 5, and the external voltage input is input into the rectifying and filtering module 6 for rectifying and filtering, and two paths of output voltages with overcurrent and overvoltage protection, anti-interference and stability are respectively 12V and 24V, so that the power consumption requirements of different types of loads of the coffee machine are met.
The 12V voltage output end is connected with a plurality of photoelectric isolation modules 7 respectively, and the photoelectric isolation modules 7 are photoelectric isolators or photoelectric couplers, can effectively realize isolation between the input end and the output end, and have good electric insulation and anti-interference capability.
A plurality of optoelectronic isolation modules 7 are connected with a plurality of silicon controlled switches 8 in a one-to-one correspondence manner, silicon controlled switch 8 is connected to the power end of a load, for a coffee machine, a grinder, a boiler, a plunger pump and the like are commonly used for loading, namely, a 12V voltage output end is connected with the load through silicon controlled switch 8 after being isolated by optoelectronic isolation modules 7, when silicon controlled switch 8 is switched on, the 12V voltage output end is switched on with the load, the 12V voltage output end supplies power for the load, the load works, when silicon controlled switch 8 is switched off, the 12V voltage output end is switched off with the load, the load is connected without voltage, and the coffee machine is shut down when power is cut off. The controllable silicon switch 8 can be used for stably and reliably controlling the power on and power off of the load.
According to the power supply circuit board, the circuit modules are integrated on the PCB, so that the number of circuit parts and wiring wires can be reduced, the occupied space for installation is reduced, the wiring process is simplified, and the overall cost of the power supply circuit board is reduced;
this is disclosed through setting up filtering module and optoelectronic isolation module 7, can effectively keep apart between the different circuit module, and handles through rectification filtering, can provide stable output voltage to through silicon controlled switch 8, utilize silicon controlled switch 8 response fast, reliability and the high characteristics of stability, can realize stable, the high-efficient control to the load break-make, and then improve coffee machine whole job stabilization nature and reliability.
Further, in this embodiment, please refer to fig. 2 in detail, the first fuse module 2 is a 15A fuse, specifically a 15A fuse, the second fuse module 3 is a 4A fuse, specifically a 4A fuse, the first fuse module 2 and the second fuse module 3 are respectively connected to the front ends of the first filter module 4 and the second filter module 5 for performing over-current protection, and when the branch current exceeds the current value of the fuse, the fuse is fused to cut off the power, thereby avoiding the over-current of the circuit.
Furthermore, in this embodiment, the first filtering module 4 and the second filtering module 5 are both EMI/EMC filtering circuits, the EMC filtering circuits can use conventional EMC filters to eliminate inductive load-through of the subsequent devices, and the EMI filtering circuits can greatly attenuate EMI signals transmitted by the power supply, thereby protecting the load devices from damage and effectively filtering interference signals in the input voltage of the power supply.
Further, in the present embodiment, the rectification filter module 6 includes a first power management unit 61, a second power management unit 62, a first driving circuit 63, a second driving circuit 64, a 12V high-frequency transformation circuit 65, a 24V high-frequency transformation circuit 66, a first filter circuit 67, and a second filter circuit 68;
specifically, the rectification filter module 6 has two branches, which correspond to a 12V voltage output end and a 24V voltage output end respectively;
the second filtering module 5 is connected with the 12V voltage output end after being sequentially connected with the first power management unit 61, the first driving circuit 63, the 12V high-frequency voltage transformation circuit 65 and the first filtering circuit 67 in series, after the input voltage is primarily filtered by the second filtering module 5, the input voltage is managed by the first power management unit 61 in the branch, is driven by the first driving circuit 63, is transformed to 12V voltage by the 12V high-frequency voltage transformation circuit 65, and is rectified and filtered by the first filtering circuit 67 to form stable 12V voltage output.
The second filtering module 5 is connected in series with the second power management unit 62, the second driving circuit 64, the 24V high-frequency transforming circuit 66 and the second filtering circuit 68 in sequence and then connected to the 24V voltage output end, similarly, the second power management unit 62 is used for performing power management on the 24V power, the second driving circuit 64 is used for driving and starting according to the output signal of the second power management unit 62, the 24V high-frequency transforming circuit 66 is used for transforming the input voltage to 24V, and the second filtering circuit 68 is used for performing rectification filtering and finally outputting the stable 24V voltage.
The rectifying and filtering signal can rectify and filter the input voltage to form stable 12V and 24V voltage outputs so as to meet the power consumption requirements of different loads of the coffee machine, and meanwhile, the supply voltage is stable and less in interference.
Further, in this embodiment, the first power management unit 61 and the second power management unit 62 are both LD7575 power management units, and the LD7575 power management unit can implement reliable power management, has overvoltage and overload protection functions, and is suitable for this embodiment.
Further, in this embodiment, the first driving circuit 63 and the second driving circuit 64 are both MOS transistor driving circuits, and the MOS transistor driving circuits have the advantages of fast response and stable driving.
Further, in this embodiment, the first filter circuit 67 and the second filter circuit 68 are both LC filter circuits, and the LC filter circuits have the advantages of large inductance to alternating current and good filtering effect.
Further, in this embodiment, 12V voltage output end and a plurality of optoelectronic isolation module 7 are connected through pin socket 9, and pin socket 9 has a plurality of output interface, can be respectively with a plurality of optoelectronic isolation module 7 electricity be connected, can make the integrated degree of circuit high, the circuit is small, the wiring of being convenient for.
The working principle of the power circuit board of the embodiment is as follows:
an external power supply 1, such as a 110V-220V mains supply input, is divided into two paths, one path provides a switching power supply meeting EMI/EMC requirements for the silicon controlled switch 8 through the first insurance module 2 and the first filtering module 4, so that the silicon controlled switch 8 can work stably.
The other path of the voltage is used for providing 12V or 24V working voltage for the load through the second insurance module 3, the second filtering module 5 and the rectifying and filtering module 6, and a photoelectric isolation module 7 and a silicon controlled switch 8 are connected to a power supply end of the load.
After the input voltage of the external power supply 1 is primarily filtered by the second filtering module 5, in the rectifying and filtering module 6, the output voltage is managed by the power management unit, the voltage is transformed into the corresponding voltage by the high-frequency voltage circuit, the stable output voltage with overvoltage overload protection is formed after filtering by the filtering circuit, the stable output voltage is photoelectrically isolated by the photoelectric isolation module 7 and is connected to the power end of a load by the silicon controlled switch 8, and when the silicon controlled switch 8 is switched on, the working voltage can be provided for the load.
This openly with each circuit module integration on a PCB board, reducible part quantity and wiring wire rod reduce occupation space, the simplified process reduces power supply circuit board overall cost, simultaneously through setting up filtering module, optoelectronic isolation module 7, can effectively keep apart the interference between the different circuit module, ensure that output voltage is stable to through silicon controlled switch 8, can realize the stable control of load break-make, and then improve coffee machine whole job stabilization nature and reliability.
In the description of the present disclosure, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience in describing and simplifying the present disclosure, and in the absence of a contrary explanation, these directional terms are not intended to indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present disclosure.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present disclosure.
Claims (8)
1. A power supply circuit board of a coffee machine comprises a PCB board, and is characterized in that a first insurance module, a second insurance module, a first filtering module, a second filtering module, a rectifying and filtering module, a plurality of photoelectric isolation modules and a plurality of silicon controlled switches are arranged on the PCB board;
one end of the first insurance module is connected with an external power supply, and the other end of the first insurance module is respectively and electrically connected with the silicon controlled switches through the first filtering module;
one end of the second safety module is connected with an external power supply, and the other end of the second safety module is sequentially connected with the second filtering module and the rectifying and filtering module in series to form a 12V voltage output end and a 24V voltage output end;
the 12V voltage output end is respectively connected with the plurality of photoelectric isolation modules, the plurality of photoelectric isolation modules are correspondingly connected with the plurality of silicon controlled switches one by one, and the silicon controlled switches are used for being connected to a power supply end of a load.
2. The power circuit board of claim 1, wherein the first safety module is a 15A safety circuit and the second safety module is a 4A safety circuit.
3. The power supply circuit board of the coffee machine of claim 1, wherein the first filtering module and the second filtering module are both EMI/EMC filtering circuits.
4. The power supply circuit board of the coffee machine as claimed in claim 1, wherein the rectification filter module comprises a first power supply management unit, a second power supply management unit, a first driving circuit, a second driving circuit, a 12V high-frequency transformation circuit, a 24V high-frequency transformation circuit, a first filter circuit and a second filter circuit;
the second filter module is connected with the 12V voltage output end after being sequentially connected with the first power management unit, the first driving circuit, the 12V high-frequency voltage transformation circuit and the first filter circuit in series;
the second filtering module is connected with the second power management unit, the second driving circuit, the 24V high-frequency voltage transformation circuit and the second filtering circuit in series in sequence and then connected with the 24V voltage output end.
5. The power circuit board of claim 4, wherein the first power management unit and the second power management unit are both LD7575 power management units.
6. The power circuit board of claim 4, wherein the first driving circuit and the second driving circuit are both MOS transistor driving circuits.
7. The power circuit board of claim 4, wherein the first filter circuit and the second filter circuit are both LC filter circuits.
8. The power supply circuit board of the coffee machine according to claim 1, characterized in that the 12V voltage output terminal is connected with the plurality of optoelectronic isolation modules through pin sockets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223201111.8U CN218678852U (en) | 2022-11-29 | 2022-11-29 | Power supply circuit board of coffee machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223201111.8U CN218678852U (en) | 2022-11-29 | 2022-11-29 | Power supply circuit board of coffee machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218678852U true CN218678852U (en) | 2023-03-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223201111.8U Active CN218678852U (en) | 2022-11-29 | 2022-11-29 | Power supply circuit board of coffee machine |
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| Country | Link |
|---|---|
| CN (1) | CN218678852U (en) |
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2022
- 2022-11-29 CN CN202223201111.8U patent/CN218678852U/en active Active
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