CN211481250U - Brewing control integrated chip of coffee machine - Google Patents
Brewing control integrated chip of coffee machine Download PDFInfo
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- CN211481250U CN211481250U CN202020271877.5U CN202020271877U CN211481250U CN 211481250 U CN211481250 U CN 211481250U CN 202020271877 U CN202020271877 U CN 202020271877U CN 211481250 U CN211481250 U CN 211481250U
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Abstract
The utility model discloses a coffee machine's control integrated chip that boils, the relay control unit includes supply voltage detection circuitry and relay control circuit, supply voltage detection circuitry includes first triode Q12 and the first stabilivolt Z2 of the first triode Q12 break-make of control, relay control circuit includes series connection's second triode Q1 and third triode Q4, and control the second respectively, the fourth triode Q3 and the fifth triode Q9 of third triode break-make, temperature controller control circuit includes sixth triode Q13 and seventh triode Q14, steady voltage current-limiting circuit includes first operational amplifier U1 and second operational amplifier U2. The utility model uses the combination of the operational amplifier, the reference source and the power tube to replace the voltage stabilizing tube, thereby improving the voltage precision and the product power; the current limiting mode is adopted to limit the current during voltage conversion, prevent the power tube inside the chip from being damaged and improve the integral anti-interference capability of the product; the IN port is connected with the filter circuit, so that the anti-pulse interference capability of the chip is enhanced greatly.
Description
Technical Field
The utility model relates to the field of communication technology, concretely relates to coffee machine's control integrated chip that boils.
Background
The drip coffee machine is a classic drip filter, has the advantages of simplicity, high efficiency and reliability, and is most suitable for families, offices and dormitories.
The invention relates to a dripping coffee machine, which comprises a single chip microcomputer, a voltage stabilizing circuit, a relay drive circuit, a temperature controller detection circuit and a voltage detection circuit, wherein the single chip microcomputer or various circuits are separated electronic components on the electronic board of the existing dripping coffee machine, Chinese invention patent CN 105807691B discloses a dripping coffee machine control circuit and an integrated MCU, the dripping coffee machine control circuit comprises an integrated internal voltage detection unit 1, a relay drive unit 2, a temperature controller detection unit 3, a voltage stabilizing unit 4 and a zero-crossing detection unit 5, the dripping coffee machine control circuit comprises an integrated relay drive unit 2 and an integrated internal voltage detection unit 1, when the relay drive unit inputs high level and the internal voltage detection unit detects that the power supply voltage reaches a preset voltage, controlling the relay to be sucked; when the relay driving unit inputs low level, the relay is controlled to be switched off. There still remain some disadvantages, such as:
(1) the voltage stabilizing unit is internally provided with a voltage stabilizing tube, so that the voltage precision is not high, and ghost images are easily generated on an LCD display product;
(2) the NPN bipolar transistor in the internal voltage detection unit adopts resistance current limiting to bring impact on resistance, and the anti-interference performance of the circuit is poor.
In view of the above, there is a need to improve the brewing control integrated chip of the existing coffee machine so as to improve the voltage stabilization performance of the power supply, improve the product performance, and improve the control capability.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the control integrated chip voltage precision of boiling of current coffee machine is not high, and circuit interference immunity is not good, can produce the problem that the property ability is low.
In order to solve the technical problem, the utility model provides a coffee machine boil control integrated chip, include:
the relay control unit comprises a power supply voltage detection circuit and a relay control circuit, wherein the power supply voltage detection circuit comprises a first triode Q12 and a first voltage-regulator tube Z2 for controlling the on-off of the first triode Q12, a collector of the first triode Q12 and a cathode of the first voltage-regulator tube Z2 are respectively connected to a power supply voltage input pin VCC, an anode of the first voltage-regulator tube Z2 is connected to a base of the first triode Q12, and an emitter of the first triode Q12 is grounded; the relay control circuit comprises a second triode Q1 and a third triode Q4 which are connected IN series, and a fourth triode Q3 and a fifth triode Q9 which respectively control the on-off of the second triode and the third triode, wherein the base electrode of the fourth triode Q3 is connected to a brewing signal input pin IN of the coffee machine, the collector electrode of the fourth triode Q3 is connected with a resistor R1 and the base electrode of the second triode Q1, the base electrode of the third triode Q4 is respectively connected with the collector electrode of the fifth triode Q9 and VCC, and the emitter electrode of the second triode Q1 is connected with a relay output signal pin SWO;
the temperature controller control circuit comprises a sixth triode Q13 and a seventh triode Q14, the base electrode of the seventh triode Q14 is connected with the collector electrode of the sixth triode Q13, the collector electrode of the seventh triode Q14 is connected with the output pin WO of the temperature controller, 5V voltage is respectively connected with the collector electrode and the base electrode of the seventh triode Q14 through a resistor R23 and a resistor R25, the emitting electrode of the seventh triode Q14 is grounded, and the base electrode of the sixth triode Q13 is connected with the input pin WI of the temperature controller;
the voltage-stabilizing current-limiting circuit comprises a first operational amplifier U1 and a second operational amplifier U2, wherein the positive input end of the first operational amplifier U1 is grounded and a VCC pin respectively, the reverse input end of the first operational amplifier U1 is connected with one end of a resistor R4 and one end of a resistor R7, the first operational amplifier U is also connected with the cathode of a first clamping diode Z1, and 12V voltage clamping is carried out through a first clamping diode Z1; the positive input end of the second operational amplifier U2 is respectively connected with a resistor R13 and a resistor R9, the other end of the resistor R13 is respectively connected with the ground and the positive electrode of a first clamping diode Z1, the reverse input end of the resistor R13 is connected with the negative electrode of a second clamping diode Z3, the positive electrode of the second clamping diode Z3 is connected with VCC, 5V voltage clamping is carried out through the second clamping diode Z3, the output end of the first operational amplifier U1 is connected with the base electrode of an eighth triode Q6, the emitter electrode of the eighth triode Q6 is connected with a VCC pin, the collector electrode of the eighth triode Q6 is connected with a VDD pin, the output end of the second operational amplifier U2 is connected with the base electrode of a ninth triode Q10, the emitter electrode of the ninth triode Q10 is.
In the above scheme, the signal shaping circuit further comprises a thirteenth triode Q8 and an eleventh triode Q11, wherein the collector of the eleventh triode Q11 is connected to pin CL, the emitter is grounded, the base and the emitter of the thirteenth triode Q8 are connected to the collector of the eleventh triode Q11 through a resistor R15, and the collector is connected to 5V. After CL input, the peak output is clipped.
In the above scheme, the emitter of the second triode Q1 is connected to the collector of the twelfth triode Q2, the emitter of the twelfth triode Q2 is connected to the ground line, and the base is connected to 12V. Q2 protects Q1.
IN the above scheme, the relay control circuit further includes a fourteenth triode Q7, a base and an emitter of the fourteenth triode Q7 are connected to the brewing signal input pin IN of the coffee maker through a capacitor C2, a collector is connected to a base of the thirteenth triode Q5, a collector of the thirteenth triode Q5 is connected to VCC, and an emitter is grounded. The input terminal of the first operational amplifier U1 outputs a high voltage, and the eighth transistor Q6 is turned on.
In the scheme, the filter circuit comprises a first diode D1 and a second diode D2, the anodes of the first diode D1 and the second diode D2 are connected with a first pull-down resistor R12, the cathode of the first diode D1 is connected with a resistor R5, the other end of the resistor R5 is connected with a capacitor C1, and the other end of the capacitor C1 is connected with the ground wire; the cathode of the second diode D2 is connected with a resistor R8, the other end of the resistor R8 is connected with a capacitor C2, and the other end of the capacitor C2 is connected with the ground wire.
In the above scheme, the anode of the first regulator tube Z2 and the base of the first transistor Q12 are connected to a second pull-down resistor R22 through a resistor R20.
In the scheme, the output end of the first operational amplifier U1 is connected with the base electrode of the eighth triode Q6 through a resistor R6,
in the above scheme, the output terminal of the second operational amplifier U2 is connected to the base of the ninth transistor Q10 through a resistor R14.
Compared with the prior art, the utility model provides a pair of coffee machine's control integrated chip that boils has following advantage:
(1) the operational amplifier, the reference source and the power tube are combined to replace a voltage stabilizing tube, so that the voltage precision and the product power are improved;
(2) the current limiting mode is adopted to limit the current during voltage conversion, prevent the power tube inside the chip from being damaged and improve the integral anti-interference capability of the product;
(3) the IN port is connected with the filter circuit, so that the anti-pulse interference capability of the chip is enhanced greatly.
Drawings
Fig. 1 is a circuit connection diagram of a brewing control ic chip of the coffee machine of the present invention.
Detailed Description
The utility model provides a control integrated chip that boils of coffee machine can improve power voltage stabilization performance, improves and produces property ability, has improved the control ability. The invention is described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1, the utility model provides a brewing control integrated chip of coffee machine includes:
the relay control unit comprises a power supply voltage detection circuit and a relay control circuit, wherein the power supply voltage detection circuit comprises a first triode Q12, a first voltage regulator tube Z2, a resistor R16, a resistor R20 and a second pull-down resistor R22, the first voltage regulator tube Z2 is used for controlling the on-off of a first triode Q12, a collector electrode of the first triode Q12 and a negative electrode of the first voltage regulator tube Z2 are respectively connected to a power supply voltage input pin VCC, a base electrode of the first triode Q12 is respectively connected with the resistor R20 and the resistor R22, then the base electrode of the first triode Q2 is connected to the positive electrode of the first voltage regulator tube Z2, and an emitting electrode of the first triode is. The emitter of the second triode Q1 is connected with the collector of the twelfth triode Q2, the emitter of the twelfth triode Q2 is connected with the ground wire, the base is connected with 12V voltage, and the twelfth triode Q2 is used for protecting the second triode Q1.
The relay control circuit comprises a second triode Q1, a third triode Q4, a fourth triode Q3, a fifth triode Q9, a first diode D1, a second diode D2, a resistor R1, a resistor R5, a resistor R8, a resistor R11, a first pull-down resistor R12, a capacitor C1, a capacitor C2, a twelfth triode Q2 and a fourteenth triode Q7, wherein the second triode Q1 and the third triode Q4 are connected in series; the base electrode of the fourth triode Q3 is connected to a brewing signal input pin IN of the coffee machine, the power generation electrode is grounded, the collector electrode is connected with a resistor R1 and the base electrode of the second triode Q1, the base electrode of the third triode Q4 is respectively connected with the collector electrode of the fifth triode Q9 and VCC, and the emitter electrode of the second triode Q1 is connected with a relay output signal pin SWO; the anode of the first regulator tube Z2 and the base of the first transistor Q12 are connected to a second pull-down resistor R22 through a resistor R20.
The temperature controller control circuit comprises a sixth triode Q13 and a seventh triode Q14, and further comprises a resistor R23, a resistor R24 and a resistor R25, wherein the base electrode of the seventh triode Q14 is connected with the collector electrode of the sixth triode Q13, the collector electrode of the seventh triode Q14 is connected with an output pin WO of the temperature controller, 5V voltage is respectively connected with the collector electrode and the base electrode of the seventh triode Q14 of the relay control unit through a resistor R23 and a resistor R25, the emitter electrode of the seventh triode Q14 is grounded, and the base electrode of the sixth triode Q13 is connected with a temperature controller input pin WI.
The stabilized voltage current-limiting circuit comprises a first operational amplifier U1, a second operational amplifier U2, a thirteenth triode Q5, an eighth triode Q6, a ninth triode Q10, a resistor R2, a resistor R3, a resistor R4, a first current-limiting resistor R6, a resistor R7, a resistor R9, a resistor R10, a resistor R13, a resistor R14, a resistor R17, a resistor R18, a resistor R21, a first clamping diode Z1 and a second clamping diode Z3, and the relay control unit is protected from normal operation.
The positive input end of the first operational amplifier U1 is respectively grounded and a VCC pin, the reverse input end is connected with one end of a resistor R4 and one end of a resistor R7, and is also connected with the negative electrode of a first clamping diode Z1, and 12V voltage clamping is carried out through the first clamping diode Z1; the other end of the resistor R4 is connected with a 12V power supply, the other end of the resistor R7 is connected with one end of a resistor R10 and the negative electrode of a first clamping diode Z1, the other end of the resistor R10 is connected with the ground wire, the output end of the first operational amplifier U1 is connected with the base electrode of the eighth triode Q6 through a first current-limiting resistor R6, the collector electrode of the eighth triode Q6 is connected with a VCC pin, and the emitter electrode of the eighth triode Q6 is connected with a VDD pin.
The positive input end of a second operational amplifier U2 is respectively connected with a resistor R13 and a resistor R9, the other end of the resistor R13 is respectively grounded and the anode of a first clamping diode Z1, the reverse input end is connected with the cathode of a second clamping diode Z3, the anode of a second clamping diode Z3 is connected with VCC, 5V voltage clamping is carried out through the second clamping diode Z3, the cathode of the second clamping diode Z3 is respectively connected with one end of a resistor R18 and one end of a resistor R21, the other end of the resistor R18 is connected with the resistor R17, the other end of the resistor R17 is connected with the cathode of the first clamping diode Z2, the other end of the resistor R21 is connected with the ground wire, the output end is connected with the base of a ninth triode Q10 through a second current-limiting resistor R14, the emitter of the ninth triode Q10 is connected with a GNA.
The signal shaping circuit comprises a thirteenth triode Q8, an eleventh triode Q11, a sixth triode Q13, a seventh triode Q14, a resistor R15 and a resistor R19, and is used for detecting the connection and disconnection of the temperature controller to realize the control of the relay and the waterless detection; the collector of the eleventh triode Q11 is connected with the pin CL, the emitter is grounded, the base and the emitter of the thirteenth triode Q8 are connected with the collector of the eleventh triode Q11 through the resistor R15, the collector is connected with 5V voltage, and when CL is input, the peak output is cut off.
The working principle of the utility model is as follows:
(1) after the drip coffee machine is started, when the power supply voltage VCC cannot reach a preset voltage value, namely the breakdown voltage of the first tube Z2, the first voltage-regulator tube Z2 is cut off, and the first triode Q12 is cut off, so that the fifth triode Q9, the third triode Q4 and the second triode Q1 are cut off, no output signal exists at the output port SWO of the relay, and the relay is controlled to be switched off;
(2) when a low level signal is input into the IN port, the fourth triode Q3 and the second triode Q1 are cut off, the output port SWO of the relay has no output, and the relay is controlled to be disconnected;
(3) when a high-level signal is input into the IN port, the fourth triode Q3 and the second triode Q1 are conducted; the power supply VCC reaches a preset voltage value, so the first voltage regulator tube Z2 is conducted, the first triode Q12 is conducted, the fifth triode Q9, the third triode Q4 and the second triode Q1 are conducted, and the third triode Q4 and the second triode Q1 are both conducted, so that an output signal is provided at the output port SWO of the relay, and the attraction of the relay is controlled.
(4) When a high-level signal is input into the IN port, the fourteenth triode Q7 is turned on, the thirteenth triode Q5 is turned on, the collector of the thirteenth triode Q5 is connected with 12V voltage, and the emitter is grounded, so that the voltage of the negative input end of the first operational amplifier is 0, the voltage of the positive input end of the first operational amplifier U1 is 12V, the positive input voltage is greater than the negative input voltage, at this time, the output end of the first operational amplifier U1 outputs a high level, the eighth triode Q6 is turned on, and the voltage of the pin VCC is applied to the pin VDD.
Compared with the prior art, the utility model provides a pair of coffee machine's control integrated chip that boils has following advantage:
(1) the operational amplifier, the reference source and the power tube are combined to replace a voltage stabilizing tube, so that the voltage precision and the product power are improved;
(2) the current limiting mode is adopted to limit the current during voltage conversion, prevent the power tube inside the chip from being damaged and improve the integral anti-interference capability of the product;
(3) the IN port is connected with the filter circuit, so that the anti-pulse interference capability of the chip is enhanced greatly.
The present invention is not limited to the above-mentioned best mode, and any person should learn the structural change made under the teaching of the present invention, all with the present invention has the same or similar technical solution, all fall into the protection scope of the present invention.
Claims (8)
1. A brewing control integrated chip of a coffee machine is characterized by comprising:
the relay control unit comprises a power supply voltage detection circuit and a relay control circuit, wherein the power supply voltage detection circuit comprises a first triode Q12 and a first voltage-regulator tube Z2 for controlling the on-off of the first triode Q12, a collector of the first triode Q12 and a cathode of the first voltage-regulator tube Z2 are respectively connected to a power supply voltage input pin VCC, an anode of the first voltage-regulator tube Z2 is connected to a base of the first triode Q12, and an emitter of the first triode Q12 is grounded; the relay control circuit comprises a second triode Q1 and a third triode Q4 which are connected IN series, and a fourth triode Q3 and a fifth triode Q9 which respectively control the on-off of the second triode and the third triode, wherein the base electrode of the fourth triode Q3 is connected to a brewing signal input pin IN of the coffee machine, the collector electrode of the fourth triode Q3 is connected with a resistor R1 and the base electrode of the second triode Q1, the base electrode of the third triode Q4 is respectively connected with the collector electrode of the fifth triode Q9 and VCC, and the emitter electrode of the second triode Q1 is connected with a relay output signal pin SWO;
the temperature controller control circuit comprises a sixth triode Q13 and a seventh triode Q14, the base electrode of the seventh triode Q14 is connected with the collector electrode of the sixth triode Q13, the collector electrode of the seventh triode Q14 is connected with the output pin WO of the temperature controller, 5V voltage is respectively connected with the collector electrode and the base electrode of the seventh triode Q14 through a resistor R23 and a resistor R25, the emitting electrode of the seventh triode Q14 is grounded, and the base electrode of the sixth triode Q13 is connected with the input pin WI of the temperature controller;
the voltage-stabilizing current-limiting circuit comprises a first operational amplifier U1 and a second operational amplifier U2, wherein the positive input end of the first operational amplifier U1 is grounded and a VCC pin respectively, the reverse input end of the first operational amplifier U1 is connected with one end of a resistor R4 and one end of a resistor R7, the first operational amplifier U is also connected with the cathode of a first clamping diode Z1, and 12V voltage clamping is carried out through a first clamping diode Z1; the positive input end of the second operational amplifier U2 is respectively connected with a resistor R13 and a resistor R9, the other end of the resistor R13 is respectively connected with the ground and the positive electrode of a first clamping diode Z1, the reverse input end of the resistor R13 is connected with the negative electrode of a second clamping diode Z3, the positive electrode of the second clamping diode Z3 is connected with VCC, 5V voltage clamping is carried out through the second clamping diode Z3, the output end of the first operational amplifier U1 is connected with the base electrode of an eighth triode Q6, the emitter electrode of the eighth triode Q6 is connected with a VCC pin, the collector electrode of the eighth triode Q6 is connected with a VDD pin, the output end of the second operational amplifier U2 is connected with the base electrode of a ninth triode Q10, the emitter electrode of the ninth triode Q10 is.
2. The integrated chip for controlling brewing of a coffee maker as claimed in claim 1, further comprising a signal shaping circuit, wherein the signal shaping circuit comprises a thirteenth transistor Q8 and an eleventh transistor Q11, a collector of the eleventh transistor Q11 is connected to the pin CL, an emitter of the eleventh transistor Q3526 is connected to the ground, a base and an emitter of the thirteenth transistor Q8 are connected to a collector of the eleventh transistor Q11 through a resistor R15, and the collector is connected to a voltage of 5V.
3. The integrated chip for controlling brewing of a coffee maker as claimed in claim 1, wherein an emitter of the second transistor Q1 is connected to a collector of a twelfth transistor Q2, an emitter of the twelfth transistor Q2 is connected to ground, and a base is connected to a voltage of 12V.
4. The integrated chip for controlling brewing of a coffee maker as claimed IN claim 1, wherein the relay control circuit further comprises a fourteenth transistor Q7, a base and an emitter of the fourteenth transistor Q7 are connected to the brewing signal input pin IN of the coffee maker through a capacitor C2, a collector of the fourteenth transistor Q7 is connected to the base of the thirteenth transistor Q5, a collector of the thirteenth transistor Q5 is connected to VCC, an emitter of the thirteenth transistor is connected to ground, an input of the first operational amplifier U1 outputs a high voltage, and the eighth transistor Q6 is turned on.
5. The integrated chip for controlling brewing of coffee maker as claimed in claim 1, further comprising a filter circuit, wherein the filter circuit comprises a first diode D1 and a second diode D2, the anodes of the first diode D1 and the second diode D2 are connected to a first pull-down resistor R12, the cathode of the first diode D1 is connected to a resistor R5, the other end of the resistor R5 is connected to a capacitor C1, and the other end of the capacitor C1 is connected to the ground; the cathode of the second diode D2 is connected with a resistor R8, the other end of the resistor R8 is connected with a capacitor C2, and the other end of the capacitor C2 is connected with the ground wire.
6. The integrated chip for controlling brewing of a coffee maker as claimed in claim 1, wherein the positive electrode of the first voltage regulator tube Z2 and the base of the first transistor Q12 are connected to a second pull-down resistor R22 through a resistor R20.
7. The integrated chip for controlling brewing of a coffee maker as claimed in claim 1, wherein the output terminal of the first operational amplifier U1 is connected to the base terminal of the eighth transistor Q6 through a first current limiting resistor R6.
8. The integrated chip for controlling brewing of a coffee maker as claimed in claim 1, wherein an output terminal of the second operational amplifier U2 is connected to a base terminal of the ninth transistor Q10 through a second current limiting resistor R14.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020271877.5U CN211481250U (en) | 2020-03-06 | 2020-03-06 | Brewing control integrated chip of coffee machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020271877.5U CN211481250U (en) | 2020-03-06 | 2020-03-06 | Brewing control integrated chip of coffee machine |
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| CN211481250U true CN211481250U (en) | 2020-09-11 |
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| CN202020271877.5U Active CN211481250U (en) | 2020-03-06 | 2020-03-06 | Brewing control integrated chip of coffee machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383987A (en) * | 2020-11-13 | 2021-02-19 | 山东旭程照明科技有限公司 | LED driving power supply and core parameter calculation method thereof |
| CN117492396A (en) * | 2023-11-03 | 2024-02-02 | 广州技诺智能设备有限公司 | Water supply control circuit and system of coffee machine |
-
2020
- 2020-03-06 CN CN202020271877.5U patent/CN211481250U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383987A (en) * | 2020-11-13 | 2021-02-19 | 山东旭程照明科技有限公司 | LED driving power supply and core parameter calculation method thereof |
| CN117492396A (en) * | 2023-11-03 | 2024-02-02 | 广州技诺智能设备有限公司 | Water supply control circuit and system of coffee machine |
| CN117492396B (en) * | 2023-11-03 | 2024-04-05 | 广州技诺智能设备有限公司 | Water supply control circuit and system of coffee machine |
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