Signal driving circuit and waterway switching device

Abstract

The utility model discloses a signal driving circuit and a waterway switching device, which are characterized in that the signal driving circuit comprises a voltage division circuit, the input end of which is connected with the output end of a main control circuit, and the output end of which is connected with one end of an isolation circuit; the other end of the isolating circuit is connected with the input end of the switching circuit; the output end of the switching circuit is connected with the input end of the interlocking circuit; and the output end of the interlocking circuit is connected with the valve interface and the motor interface. According to the control signal, the valve switches the waterway according to the control signal, that is, the hot water waterway is switched to the cold water waterway, and then the motor controls the make-up pump according to the control signal to lead cold water in the cold water waterway into the coffee cup so as to reduce the temperature of coffee; a user does not need to wait for natural cooling of coffee and waste a large amount of time, the purpose of cooling can be achieved by directly introducing cold water into the coffee through the signal driving circuit, and the using feeling of the coffee machine used by the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of signal driving, in particular to a signal driving circuit and a waterway switching device. Background Art

[0002] Coffee is beloved by consumers for its unique flavor. Using a coffee machine is not only convenient but also ensures high quality, leading to its widespread use. The water temperature used in coffee machines is typically between 85 and 95 degrees Celsius, with some even initially set to a higher temperature of 92 to 96 degrees Celsius. This is because water temperature directly affects the extraction rate of various coffee components, thus affecting the flavor. Therefore, to achieve optimal coffee taste, water is typically set around 90 degrees Celsius when brewing. In actual coffee machine usage, individual users have varying preferences for coffee temperature. Since brewing typically requires water around 90 degrees Celsius, the temperature of coffee brewed by a coffee machine is typically fixed (i.e., around 90 degrees Celsius). If a user desires coffee at a specific temperature, they must wait for the brewed coffee to cool naturally to their desired temperature. The coffee machine cannot adjust the temperature to suit individual preferences, resulting in a poor user experience. Summary of the Invention

[0003] Based on this, it is necessary to propose a signal driving circuit and a water channel switching device to address the above problems.

[0004] A signal driving circuit, comprising:

[0005] a voltage divider circuit, the input end of which is connected to the output end of the main control circuit, and the output end of which is connected to one end of the isolation circuit, for receiving the PWM signal output by the main control circuit, dividing the PWM signal, and outputting it to the isolation circuit;

[0006] The isolation circuit has its other end connected to the input end of the switch circuit, and is used to receive the divided PWM signal and output it to the switch circuit after isolation;

[0007] The switch circuit, whose output end is connected to the input end of the interlock circuit, is used to receive the isolated PWM signal and output a control signal to the interlock circuit;

[0008] The interlocking circuit has an output end connected to the valve interface and the motor interface, and is used to receive the control signal and output the control signal to the valve interface or the motor interface to drive the valve connected to the valve interface or the motor connected to the motor interface to operate.

[0009] In one embodiment, the voltage divider circuit includes: a first resistor, a second resistor, and a third resistor;

[0010] Both ends of the first resistor are connected to the output end of the main control circuit;

[0011] One end of the third resistor is connected to the output end of the main control circuit, and the other end is connected to one end of the second resistor and one end of the isolation circuit;

[0012] The other end of the second resistor is connected to one end of the isolation circuit.

[0013] In one embodiment, the isolation circuit includes: an optocoupler isolator;

[0014] The anode and cathode of the optocoupler are connected to the two ends of the second resistor respectively, the emitter of the optocoupler is connected to the input end of the switch circuit; and the collector of the optocoupler is connected to an external power supply.

[0015] In one embodiment, the switch circuit includes: a fourth resistor, a fifth resistor, a first diode and a MOS transistor;

[0016] One end of the fourth resistor is connected to the other end of the optocoupler isolator, and the other end of the fourth resistor is connected to one end of the fifth resistor and the cathode of the first diode;

[0017] The other end of the fifth resistor is connected to the anode of the first diode;

[0018] The source of the MOS transistor is connected to the anode of the first diode, the gate of the MOS transistor is connected to one end of the fifth resistor, and the drain of the MOS transistor is connected to the input end of the interlock circuit.

[0019] In one embodiment, the interlock circuit includes: a second diode and a sixth resistor;

[0020] The cathode of the second diode is connected to the output end of the switch circuit and the valve interface, and the anode of the second diode is connected to the motor interface;

[0021] One end of the sixth resistor is connected to the cathode of the second diode, and the other end is connected to the valve interface.

[0022] In one embodiment, the signal driving circuit further includes: a first light emitting diode;

[0023] The anode of the first light emitting diode is connected to the output end of the main control circuit, and the cathode of the first light emitting diode is connected to one end of the first resistor.

[0024] In one embodiment, the signal driving circuit further includes: a second light emitting diode;

[0025] The cathode of the second light emitting diode is connected to one end of the sixth resistor away from the second diode, and the anode of the second light emitting diode is connected to the other end of the isolation circuit.

[0026] In one embodiment, the signal driving circuit further includes: a third diode;

[0027] The cathode of the third diode is connected to the other end of the isolation circuit, and the anode of the third diode is connected to the cathode of the second diode.

[0028] In one embodiment, the signal driving circuit further includes: a fourth diode;

[0029] The anode of the fourth diode is connected to the anode of the second diode, and the cathode of the fourth diode is connected to the other end of the isolation circuit.

[0030] A water channel switching device comprises the signal drive circuit, a valve and a motor as described above; the output end of the signal drive circuit is connected to the valve and the motor.

[0031] The implementation of the present invention will have the following beneficial effects:

[0032] In the present application, a voltage divider circuit receives a PWM signal output by the main control circuit, divides the PWM signal, and outputs it to the isolation circuit. The isolation circuit receives the divided PWM signal, isolates it, and outputs it to the switch circuit. The switch circuit receives the isolated PWM signal and outputs a control signal to the interlock circuit. The interlock circuit receives the control signal and outputs it to the valve interface or the motor interface to drive the valve connected to the valve interface or the motor connected to the motor interface. The valve switches the water path according to the control signal, i.e., switches the hot water path to the cold water path. The motor then controls the water supply pump according to the control signal to direct cold water from the cold water path to the coffee cup to reduce the coffee temperature. This eliminates the need for the user to wait for the coffee to cool naturally, which wastes a lot of time. The coffee can be cooled by directly introducing cold water into the coffee through the signal drive circuit, thereby improving the user experience of the coffee machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] in:

[0035] Figure 1 is a structural block diagram of a signal driving circuit in one embodiment;

[0036] Figure 2 FIG. 4 is a circuit diagram of a signal driving circuit in one embodiment. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Coffee is beloved by consumers for its unique flavor. Using a coffee machine is not only convenient but also ensures high quality, leading to its widespread use. The water temperature used in coffee machines is typically between 85 and 95 degrees Celsius, with some even initially set to a higher temperature of 92 to 96 degrees Celsius. This is because water temperature directly affects the extraction rate of various coffee components, thus affecting the flavor. Therefore, to achieve optimal coffee taste, water is typically set around 90 degrees Celsius when brewing. In actual coffee machine usage, individual users have varying preferences for coffee temperature. Since brewing typically requires water around 90 degrees Celsius, the temperature of coffee brewed by a coffee machine is typically fixed (i.e., around 90 degrees Celsius). If a user desires coffee at a specific temperature, they must wait for the brewed coffee to cool naturally to their desired temperature. The coffee machine cannot adjust the temperature to suit individual preferences, resulting in a poor user experience. In order to solve the above technical problems, the present application provides a signal driving circuit, referring to Figure 1, including: a voltage divider circuit 10, an isolation circuit 20, a switch circuit 30 and an interlock circuit 40; wherein, the input end of the voltage divider circuit 10 is connected to the output end of the main control circuit, and the output end is connected to one end of the isolation circuit 20, for receiving the PWM signal output by the main control circuit, and outputting the PWM signal to the isolation circuit 20 after voltage division; the other end of the isolation circuit 20 is connected to the input end of the switch circuit 30, for receiving the divided PWM signal, and outputting it to the switch circuit 30 after isolation; the output end of the switch circuit 30 is connected to the input end of the interlock circuit 40, for receiving the isolated PWM signal, and outputting a control signal to the interlock circuit 40; the output end of the interlock circuit 40 is connected to the valve interface and the motor interface, for receiving the control signal, and outputting the control signal to the valve interface or the motor interface to drive the valve connected to the valve interface or the motor connected to the motor interface to operate. In the present application, a voltage divider circuit receives a PWM signal output by the main control circuit, divides the PWM signal, and outputs it to the isolation circuit. The isolation circuit receives the divided PWM signal, isolates it, and outputs it to the switch circuit. The switch circuit receives the isolated PWM signal and outputs a control signal to the interlock circuit. The interlock circuit receives the control signal and outputs it to the valve interface or the motor interface to drive the valve connected to the valve interface or the motor connected to the motor interface. The valve switches the water path according to the control signal, i.e., switches the hot water path to the cold water path. The motor then controls the water supply pump according to the control signal to direct cold water from the cold water path to the coffee cup to reduce the coffee temperature. This eliminates the need for the user to wait for the coffee to cool naturally, which wastes a lot of time. The coffee can be cooled by directly introducing cold water into the coffee through the signal drive circuit, thereby improving the user experience of the coffee machine.

[0039] In one embodiment, Figure 2 The voltage divider circuit 10 includes: a first resistor R2, a second resistor R3 and a third resistor R4; wherein both ends of the first resistor R2 are connected to the output end of the main control circuit; one end of the third resistor R4 is connected to the output end of the main control circuit, and the other end is connected to one end of the second resistor R3 and one end of the isolation circuit 20; the other end of the second resistor R3 is connected to one end of the isolation circuit 20.

[0040] In one embodiment, Figure 2The isolation circuit 20 includes an optocoupler isolator U1. The anode and cathode of the optocoupler isolator U1 are respectively connected to the two ends of the second resistor R3, the emitter of the optocoupler isolator U1 is connected to the input end of the switch circuit 30, and the collector of the optocoupler isolator U1 is connected to an external power supply. The optocoupler isolator U1 can isolate the circuits connected to its front and back ends to ensure circuit safety.

[0041] In one embodiment, Figure 2 The switching circuit 30 includes: a fourth resistor R5, a fifth resistor R6, a first diode D4 and a MOS transistor FET1; wherein one end of the fourth resistor R5 is connected to the other end of the optocoupler isolator U1, and the other end of the fourth resistor R5 is connected to one end of the fifth resistor R6 and the cathode of the first diode D4; the other end of the fifth resistor R6 is connected to the anode of the first diode D4; the source of the MOS transistor FET1 is connected to the anode of the first diode D4, the gate of the MOS transistor FET1 is connected to one end of the fifth resistor R6, and the drain of the MOS transistor FET1 is connected to the input end of the interlock circuit 40.

[0042] In one embodiment, Figure 2 The interlock circuit 40 includes a second diode D3 and a sixth resistor R1. The cathode of the second diode D3 is connected to the output of the switch circuit 30 and the valve interface, and the anode of the second diode D3 is connected to the motor interface. One end of the sixth resistor R1 is connected to the cathode of the second diode D3, and the other end is connected to the valve interface. This interlock circuit 40 can prevent the motor from starting when the valve is activated, or prevent the valve from starting when the motor is activated, thereby achieving the purpose of interlocking the valve and motor.

[0043] In one embodiment, Figure 2 The signal driving circuit further includes a first light-emitting diode (LED2); wherein the anode of the first light-emitting diode (LED2) is connected to the output terminal of the main control circuit, and the cathode of the first light-emitting diode (LED2) is connected to one end of the first resistor (R2). The first light-emitting diode (LED2) is used to instruct the main control circuit to output a PWM signal to the signal driving circuit.

[0044] In one embodiment, Figure 2 The signal driving circuit further includes a second light-emitting diode LED1; wherein the cathode of the second light-emitting diode LED1 is connected to the end of the sixth resistor R1 away from the second diode D3, and the anode of the second light-emitting diode LED1 is connected to the other end of the isolation circuit 20. The second light-emitting diode LED1 is used to indicate whether the valve is open.

[0045] In one embodiment, Figure 2 The signal driving circuit further includes a third diode D1, wherein the cathode of the third diode D1 is connected to the other end of the isolation circuit 20, and the anode of the third diode D1 is connected to the cathode of the second diode D3. The third diode D1 serves to prevent reverse connection.

[0046] In one embodiment, Figure 2 The signal driving circuit further includes a fourth diode D2, wherein the anode of the fourth diode D2 is connected to the anode of the second diode D3, and the cathode of the fourth diode D2 is connected to the other end of the isolation circuit 20. The fourth diode D2 serves to prevent reverse connection.

[0047] The present application also provides a water channel switching device, comprising the signal drive circuit, valve and motor as described above; the output end of the signal drive circuit is connected to the valve and the motor.

[0048] In the present application, a voltage divider circuit receives a PWM signal output by the main control circuit, divides the PWM signal, and outputs it to the isolation circuit. The isolation circuit receives the divided PWM signal, isolates it, and outputs it to the switch circuit. The switch circuit receives the isolated PWM signal and outputs a control signal to the interlock circuit. The interlock circuit receives the control signal and outputs it to the valve interface or the motor interface to drive the valve connected to the valve interface or the motor connected to the motor interface. The valve switches the water path according to the control signal, i.e., switches the hot water path to the cold water path. The motor then controls the water supply pump according to the control signal to direct cold water from the cold water path to the coffee cup to reduce the coffee temperature. This eliminates the need for the user to wait for the coffee to cool naturally, which wastes a lot of time. The coffee can be cooled by directly introducing cold water into the coffee through the signal drive circuit, thereby improving the user experience of the coffee machine.

[0049] 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 signal driving circuit, characterized in that: include: a voltage divider circuit, the input end of which is connected to the output end of the main control circuit, and the output end of which is connected to one end of the isolation circuit, for receiving the PWM signal output by the main control circuit, dividing the PWM signal, and outputting it to the isolation circuit; The isolation circuit has its other end connected to the input end of the switch circuit, and is used to receive the divided PWM signal and output it to the switch circuit after isolation; The switch circuit, whose output end is connected to the input end of the interlock circuit, is used to receive the isolated PWM signal and output a control signal to the interlock circuit; The interlocking circuit has an output end connected to the valve interface and the motor interface, and is used to receive the control signal and output the control signal to the valve interface or the motor interface to drive the valve connected to the valve interface or the motor connected to the motor interface to operate.

2. The signal driving circuit according to claim 1, wherein: The voltage divider circuit includes: a first resistor, a second resistor and a third resistor; Both ends of the first resistor are connected to the output end of the main control circuit; One end of the third resistor is connected to the output end of the main control circuit, and the other end is connected to one end of the second resistor and one end of the isolation circuit; The other end of the second resistor is connected to one end of the isolation circuit.

3. The signal driving circuit according to claim 2, wherein: The isolation circuit includes: an optocoupler isolator; The anode and cathode of the optocoupler are connected to the two ends of the second resistor respectively, the emitter of the optocoupler is connected to the input end of the switch circuit; and the collector of the optocoupler is connected to an external power supply.

4. The signal driving circuit according to claim 3, wherein: The switch circuit includes: a fourth resistor, a fifth resistor, a first diode and a MOS tube; One end of the fourth resistor is connected to the other end of the optocoupler isolator, and the other end of the fourth resistor is connected to one end of the fifth resistor and the cathode of the first diode; The other end of the fifth resistor is connected to the anode of the first diode; The source of the MOS transistor is connected to the anode of the first diode, the gate of the MOS transistor is connected to one end of the fifth resistor, and the drain of the MOS transistor is connected to the input end of the interlock circuit.

5. The signal driving circuit according to claim 1, wherein: The interlock circuit includes: a second diode and a sixth resistor; The cathode of the second diode is connected to the output end of the switch circuit and the valve interface, and the anode of the second diode is connected to the motor interface; One end of the sixth resistor is connected to the cathode of the second diode, and the other end is connected to the valve interface.

6. The signal driving circuit according to claim 2, wherein: Also includes: a first light emitting diode; The anode of the first light emitting diode is connected to the output end of the main control circuit, and the cathode of the first light emitting diode is connected to one end of the first resistor.

7. The signal driving circuit according to claim 5, wherein: Also includes: a second light emitting diode; The cathode of the second light emitting diode is connected to one end of the sixth resistor away from the second diode, and the anode of the second light emitting diode is connected to the other end of the isolation circuit.

8. The signal driving circuit according to claim 5, wherein: Also includes: The third diode; The cathode of the third diode is connected to the other end of the isolation circuit, and the anode of the third diode is connected to the cathode of the second diode.

9. The signal driving circuit according to claim 5, wherein: Also includes: a fourth diode; An anode of the fourth diode is connected to an anode of the second diode, and a cathode of the fourth diode is connected to the other end of the isolation circuit.

10. A waterway switching device, characterized in that: It comprises the signal driving circuit, valve and motor according to any one of claims 1 to 9; the output end of the signal driving circuit is connected to the valve and the motor.

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