Valve control circuit

Abstract

The utility model discloses a valve control circuit, which comprises a pressure acquisition circuit with an input end connected with a pressure sensor and an output end connected with a master control circuit; the output end of the main control circuit is connected with the output circuit and the driving circuit; the output end of the output circuit is connected with the pressure release valve; and the output end of the driving circuit is connected with the slag discharge valve. The internal pressure of the boiler of the coffee machine can be detected in real time, and when the pressure is too large, real-time pressure relief treatment is performed by controlling the pressure relief valve, so that the coffee machine is relatively convenient to use, and the use efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve control, in particular to a valve control circuit. Background Art

[0002] A boiler for boiling water is usually provided inside the coffee machine, and the pressure inside the boiler is directly related to the safety of the coffee machine. If the pressure inside the boiler is too high, pressure relief is usually required to balance the pressure inside the boiler. In the prior art, the excessive pressure inside the boiler is usually dealt with by manual pressure relief, which makes the coffee machine inconvenient to use and reduces its efficiency. Utility Model Content

[0003] Based on this, it is necessary to propose a valve control circuit to address the above problems.

[0004] A valve control circuit, comprising:

[0005] A pressure acquisition circuit, the input end of which is connected to the pressure sensor, and the output end of which is connected to the main control circuit, for receiving the pressure parameters acquired by the sensor and outputting the pressure parameters to the main control circuit;

[0006] The main control circuit, whose output end is connected to the output circuit and the drive circuit, is used to receive the pressure parameter and output a first control signal to the output circuit; and receive an external instruction and output a second control signal to the drive circuit;

[0007] The output circuit, whose output end is connected to the pressure relief valve, is used to receive the first control signal and control the action of the pressure relief valve;

[0008] The output end of the driving circuit is connected to the slag discharge valve, and is used to receive the second control signal and control the action of the slag discharge valve.

[0009] In one embodiment, the main control circuit includes:

[0010] A conversion circuit, whose input end is used to receive the external instruction, and whose output end is connected to the input end of the control circuit, and is used to convert the high level corresponding to the external instruction into a low level and then output it to the control circuit;

[0011] The control circuit, whose input end is also connected to the input end of the pressure acquisition circuit, is used to receive the pressure parameter and output the first control signal to the output circuit; and receive the low-level external instruction and output the second control signal to the drive circuit.

[0012] In one embodiment, the pressure acquisition circuit includes: a first resistor, a second resistor and a first transistor;

[0013] One end of the first resistor is connected to the pressure sensor, and the other end of the first resistor is connected to one end of the second resistor and the base of the first transistor;

[0014] The other end of the second resistor is connected to the emitter of the first transistor and is grounded;

[0015] The collector of the first transistor is connected to the main control circuit.

[0016] In one embodiment, the output circuit includes: a third resistor, a fourth resistor, a fifth resistor, a first diode and a MOS tube;

[0017] One end of the third resistor and the cathode of the first diode are both connected to an external power source, and the other end of the third resistor is connected to the anode of the first diode and the control end of the pressure relief valve;

[0018] The drain of the MOS tube is connected to the anode of the first diode, the source of the MOS tube is grounded, and the gate of the MOS tube is connected to one end of the fourth resistor;

[0019] The other end of the fourth resistor is connected to one end of the fifth resistor and the output end of the main control circuit;

[0020] The other end of the fifth resistor is grounded.

[0021] In one embodiment, the output circuit further includes: an indicator light;

[0022] The anode of the indicator light is connected to an end of the third resistor away from the external power supply, and the cathode of the indicator light is connected to the anode of the first diode.

[0023] In one embodiment, the conversion circuit includes: a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor and a second transistor;

[0024] One end of the sixth resistor is used to receive the external instruction, and the other end of the sixth resistor is connected to one end of the seventh resistor and one end of the first capacitor;

[0025] The other end of the seventh resistor is connected to an external power supply;

[0026] The other end of the first capacitor is grounded;

[0027] One end of the eighth resistor is connected to the external power supply, and the other end is connected to the collector of the second transistor;

[0028] The collector of the second transistor is connected to the control circuit, the base of the second transistor is connected to the other end of the sixth resistor, and the emitter of the second transistor is grounded.

[0029] In one embodiment, the control circuit includes: a main control chip;

[0030] The first output terminal of the main control chip is connected to the input terminal of the output circuit;

[0031] The first input terminal of the main control chip is connected to the output terminal of the pressure collection circuit;

[0032] The second input terminal of the main control chip is connected to the output terminal of the conversion circuit;

[0033] The communication output terminal, the communication input terminal, the reset output terminal, the sleep output terminal, the step output terminal and the drive output terminal of the main control chip are all connected to the drive circuit.

[0034] In one embodiment, the driving circuit includes: a driving chip, a second capacitor and a third capacitor;

[0035] The communication input terminal of the driving chip is connected to the communication output terminal of the main control chip;

[0036] The communication output terminal of the driving chip is connected to the communication input terminal of the main control chip;

[0037] The reset terminal of the driving chip is connected to the reset output terminal of the main control chip;

[0038] The sleep terminal of the driving chip is connected to the sleep output terminal of the main control chip;

[0039] The stepping end of the driving chip is connected to the stepping output end of the main control chip;

[0040] The driving end of the driving chip is connected to the driving output end of the main control chip;

[0041] One end of the second capacitor is connected to the first power supply terminal of the driving chip, and the other end is grounded;

[0042] The third capacitor is connected in parallel with the second capacitor.

[0043] In one embodiment, the driving circuit further includes: a fourth capacitor and a fifth capacitor;

[0044] One end of the fourth capacitor is connected to the second power supply terminal of the driving chip, and the other end is grounded;

[0045] The fifth capacitor is connected in parallel with the fourth capacitor.

[0046] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0047] The present application receives the pressure parameters collected by the sensor through the pressure collection circuit, and outputs the pressure parameters to the main control circuit; the main control circuit receives the pressure parameters and outputs a first control signal to the output circuit; and receives an external instruction and outputs a second control signal to the drive circuit; the output circuit receives the first control signal and controls the action of the pressure relief valve; the drive circuit receives the second control signal and controls the action of the slag discharge valve. The present application enables the internal pressure of the boiler of the coffee machine to be detected in real time, and when the pressure is too high, the pressure relief process is performed in real time by controlling the pressure relief valve, making the use of the coffee machine more convenient and improving the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] in:

[0050] Figure 1 is a structural block diagram of a valve control circuit in one embodiment;

[0051] Figure 2 is a circuit diagram of a pressure acquisition circuit and an output circuit in one embodiment;

[0052] Figure 3 is a circuit diagram of a conversion circuit in one embodiment;

[0053] Figure 4 is a circuit diagram of a control circuit in one embodiment;

[0054] Figure 5 FIG. 4 is a circuit diagram of a driving circuit in one embodiment. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0056] A boiler for boiling water is usually set inside the coffee machine, and the size of the internal pressure of the boiler is directly related to the safety of the coffee machine. If the internal pressure of the boiler is too high, it is usually necessary to release the pressure to balance the internal pressure of the boiler. In the prior art, the excessive internal pressure of the boiler is usually handled by manual pressure relief, which makes the use of the coffee machine inconvenient and reduces the efficiency. In order to solve the above technical problems, the present application provides a valve control circuit, such as Figure 1 As shown, it includes: a pressure acquisition circuit 10, a main control circuit 30, an output circuit 20 and a drive circuit 40, wherein the input end of the pressure acquisition circuit 10 is connected to the pressure sensor, and the output end is connected to the main control circuit 30, for receiving the pressure parameters acquired by the sensor and outputting the pressure parameters to the main control circuit 30; the output end of the main control circuit 30 is connected to the output circuit 20 and the drive circuit 40, for receiving the pressure parameters and outputting a first control signal to the output circuit 20; and receiving an external instruction and outputting a second control signal to the drive circuit 40; the output end of the output circuit 20 is connected to the pressure relief valve, for receiving the first control signal and controlling the action of the pressure relief valve; the output end of the drive circuit 40 is connected to the slag discharge valve, for receiving the second control signal and controlling the action of the slag discharge valve. The present application receives the pressure parameters collected by the sensor through the pressure collection circuit, and outputs the pressure parameters to the main control circuit; the main control circuit receives the pressure parameters and outputs a first control signal to the output circuit; and receives an external instruction and outputs a second control signal to the drive circuit; the output circuit receives the first control signal and controls the action of the pressure relief valve; the drive circuit receives the second control signal and controls the action of the slag discharge valve. The present application enables the internal pressure of the boiler of the coffee machine to be detected in real time, and when the pressure is too high, the pressure relief process is performed in real time by controlling the pressure relief valve, making the use of the coffee machine more convenient and improving the use efficiency.

[0057] In one embodiment, Figure 3 and Figure 4 As shown, the main control circuit 30 includes: a conversion circuit 301 and a control circuit 302, wherein the input end of the real-time conversion circuit 301 is used to receive the external instruction, and the output end is connected to the input end of the control circuit 302, and is used to convert the high level corresponding to the external instruction into a low level and output it to the control circuit 302; the input end of the control circuit 302 is also connected to the input end of the pressure acquisition circuit 10, and is used to receive the pressure parameter and output the first control signal to the output circuit 20; and receive the low-level external instruction and output the second control signal to the drive circuit 40.

[0058] In one embodiment, Figure 2As shown, the pressure acquisition circuit 10 includes: a first resistor R7, a second resistor R28 and a first transistor Q3; wherein, one end of the first resistor R7 is connected to the pressure sensor, and the other end of the first resistor R7 is connected to one end of the second resistor R28 and the base of the first transistor Q3; the other end of the second resistor R28 is connected to the emitter of the first transistor Q3 and grounded; the collector of the first transistor Q3 is connected to the main control circuit 30.

[0059] In one embodiment, Figure 2 As shown, the output circuit 20 includes: a third resistor R8, a fourth resistor R29, a fifth resistor R30, a first diode VD1 and a MOS transistor Q6; wherein one end of the third resistor R8 and the cathode of the first diode VD1 are both connected to an external power supply, and the other end of the third resistor R8 is connected to the anode of the first diode VD1 and the control end of the pressure relief valve; the drain of the MOS transistor Q6 is connected to the anode of the first diode VD1, the source of the MOS transistor Q6 is grounded, and the gate of the MOS transistor Q6 is connected to one end of the fourth resistor R29; the other end of the fourth resistor R29 is connected to one end of the fifth resistor R30 and the output end of the main control circuit 30; the other end of the fifth resistor R30 is grounded.

[0060] In one embodiment, the output circuit 20 further includes: an indicator light LED3; wherein an anode of the indicator light LED3 is connected to an end of the third resistor R8 away from the external power supply, and a cathode of the indicator light LED3 is connected to an anode of the first diode VD1.

[0061] In one embodiment, Figure 3 As shown, the conversion circuit 301 includes: a sixth resistor R17, a seventh resistor R10, an eighth resistor R11, a first capacitor C13 and a second transistor Q1; wherein, one end of the sixth resistor R17 is used to receive the external instruction, and the other end of the sixth resistor R17 is connected to one end of the seventh resistor R10 and one end of the first capacitor C13; the other end of the seventh resistor R10 is connected to an external power supply; the other end of the first capacitor C13 is grounded; one end of the eighth resistor R11 is connected to the external power supply, and the other end is connected to the collector of the second transistor Q1; the collector of the second transistor Q1 is connected to the control circuit 302, the base of the second transistor Q1 is connected to the other end of the sixth resistor R17, and the emitter of the second transistor Q1 is grounded.

[0062] In one embodiment, Figure 3As shown, the control circuit 302 includes: a main control chip U3; wherein, the first output terminal P1.2 of the main control chip U3 is connected to the input terminal of the output circuit 20; the first input terminal P1.5 of the main control chip U3 is connected to the output terminal of the pressure acquisition circuit 10; the second input terminal P1.7 of the main control chip U3 is connected to the output terminal of the conversion circuit 301; the communication output terminal P1.1, communication input terminal P1.0, reset output terminal P3.6, sleep output terminal P3.5, step output terminal P3.4, and drive output terminal P3.3 of the main control chip U3 are all connected to the drive circuit 40.

[0063] In one embodiment, Figure 5 As shown, the driving circuit 40 includes: a driving chip U2, a second capacitor C11 and a third capacitor C12; wherein, the communication input terminal MS1 of the driving chip U2 is connected to the communication output terminal P1.1 of the main control chip U3; the communication output terminal MS2 of the driving chip U2 is connected to the communication input terminal P1.0 of the main control chip U3; the reset terminal RST of the driving chip U2 is connected to the reset output terminal P3.6 of the main control chip U3; the sleep terminal SLEEP of the driving chip U2 is connected to the sleep output terminal P3.5 of the main control chip U3; the stepping terminal STEP of the driving chip U2 is connected to the stepping output terminal P3.4 of the main control chip U3; the driving terminal DIR of the driving chip U2 is connected to the driving output terminal P3.3 of the main control chip U3; one end of the second capacitor C11 is connected to the first power supply terminal VBB1 of the driving chip U2, and the other end is grounded; the third capacitor C12 is connected in parallel with the second capacitor C11.

[0064] In one embodiment, Figure 5 As shown, the driving circuit 40 also includes: a fourth capacitor C16 and a fifth capacitor C18; wherein one end of the fourth capacitor C16 is connected to the second power supply terminal VBB2 of the driving chip U2, and the other end is grounded; the fifth capacitor C18 is connected in parallel with the fourth capacitor C16. The present application receives the pressure parameter collected by the sensor through the pressure acquisition circuit, and outputs the pressure parameter to the main control circuit; the main control circuit receives the pressure parameter and outputs a first control signal to the output circuit; and receives an external instruction and outputs a second control signal to the driving circuit; the output circuit receives the first control signal and controls the action of the pressure relief valve; the driving circuit receives the second control signal and controls the action of the slag discharge valve. The present application enables the internal pressure of the boiler of the coffee machine to be detected in real time, and when the pressure is too high, the pressure relief process is performed in real time by controlling the pressure relief valve, so that the use of the coffee machine is more convenient and the use efficiency is improved.

[0065] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A valve control circuit, characterized in that: include: A pressure acquisition circuit, the input end of which is connected to the pressure sensor, and the output end of which is connected to the main control circuit, for receiving the pressure parameters acquired by the sensor and outputting the pressure parameters to the main control circuit; The main control circuit, whose output end is connected to the output circuit and the drive circuit, is used to receive the pressure parameter and output a first control signal to the output circuit; and receive an external instruction and output a second control signal to the drive circuit; The output circuit, whose output end is connected to the pressure relief valve, is used to receive the first control signal and control the action of the pressure relief valve; The output end of the driving circuit is connected to the slag discharge valve, and is used to receive the second control signal and control the action of the slag discharge valve.

2. The valve control circuit according to claim 1, characterized in that: The main control circuit comprises: A conversion circuit, whose input end is used to receive the external instruction, and whose output end is connected to the input end of the control circuit, and is used to convert the high level corresponding to the external instruction into a low level and then output it to the control circuit; The control circuit, whose input end is also connected to the input end of the pressure acquisition circuit, is used to receive the pressure parameter and output the first control signal to the output circuit; and receive the low-level external instruction and output the second control signal to the drive circuit.

3. The valve control circuit according to claim 1, characterized in that: The pressure acquisition circuit comprises: a first resistor, a second resistor and a first transistor; One end of the first resistor is connected to the pressure sensor, and the other end of the first resistor is connected to one end of the second resistor and the base of the first transistor; The other end of the second resistor is connected to the emitter of the first transistor and is grounded; The collector of the first transistor is connected to the main control circuit.

4. The valve control circuit according to claim 1, characterized in that: The output circuit comprises: a third resistor, a fourth resistor, a fifth resistor, a first diode and a MOS tube; One end of the third resistor and the cathode of the first diode are both connected to an external power source, and the other end of the third resistor is connected to the anode of the first diode and the control end of the pressure relief valve; The drain of the MOS tube is connected to the anode of the first diode, the source of the MOS tube is grounded, and the gate of the MOS tube is connected to one end of the fourth resistor; The other end of the fourth resistor is connected to one end of the fifth resistor and the output end of the main control circuit; The other end of the fifth resistor is grounded.

5. The valve control circuit according to claim 4, characterized in that: The output circuit also includes: an indicator light; The anode of the indicator light is connected to an end of the third resistor away from the external power supply, and the cathode of the indicator light is connected to the anode of the first diode.

6. The valve control circuit according to claim 2, characterized in that: The conversion circuit comprises: a sixth resistor, a seventh resistor, an eighth resistor, a first capacitor and a second triode; One end of the sixth resistor is used to receive the external instruction, and the other end of the sixth resistor is connected to one end of the seventh resistor and one end of the first capacitor; The other end of the seventh resistor is connected to an external power supply; The other end of the first capacitor is grounded; One end of the eighth resistor is connected to the external power supply, and the other end is connected to the collector of the second transistor; The collector of the second transistor is connected to the control circuit, the base of the second transistor is connected to the other end of the sixth resistor, and the emitter of the second transistor is grounded.

7. The valve control circuit according to claim 2, characterized in that: The control circuit comprises: a main control chip; The first output terminal of the main control chip is connected to the input terminal of the output circuit; The first input terminal of the main control chip is connected to the output terminal of the pressure collection circuit; The second input terminal of the main control chip is connected to the output terminal of the conversion circuit; The communication output terminal, the communication input terminal, the reset output terminal, the sleep output terminal, the step output terminal and the drive output terminal of the main control chip are all connected to the drive circuit.

8. The valve control circuit according to claim 7, characterized in that: The driving circuit comprises: a driving chip, a second capacitor and a third capacitor; The communication input terminal of the driving chip is connected to the communication output terminal of the main control chip; The communication output terminal of the driving chip is connected to the communication input terminal of the main control chip; The reset terminal of the driving chip is connected to the reset output terminal of the main control chip; The sleep terminal of the driving chip is connected to the sleep output terminal of the main control chip; The stepping end of the driving chip is connected to the stepping output end of the main control chip; The driving end of the driving chip is connected to the driving output end of the main control chip; One end of the second capacitor is connected to the first power supply terminal of the driving chip, and the other end is grounded; The third capacitor is connected in parallel with the second capacitor.

9. The valve control circuit according to claim 8, characterized in that: The driving circuit further includes: a fourth capacitor and a fifth capacitor; One end of the fourth capacitor is connected to the second power supply terminal of the driving chip, and the other end is grounded; The fifth capacitor is connected in parallel with the fourth capacitor.

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