CN210515053U - Brewing equipment and control circuit thereof - Google Patents
Brewing equipment and control circuit thereof Download PDFInfo
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- CN210515053U CN210515053U CN201922100491.8U CN201922100491U CN210515053U CN 210515053 U CN210515053 U CN 210515053U CN 201922100491 U CN201922100491 U CN 201922100491U CN 210515053 U CN210515053 U CN 210515053U
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Abstract
The embodiment of the utility model provides a brewing device and a control circuit thereof, wherein the control circuit comprises a controller, a power supply circuit, a relay drive circuit, a heating circuit and a sampling circuit; the heating circuit comprises a heater, a first temperature control switch, a second temperature control switch and a steam switch, the heater is connected with an alternating current power supply through a relay control circuit, the heater, the first temperature control switch and the second temperature control switch are sequentially connected in series to form a loop, the steam switch is connected with the second temperature control switch in parallel, and the action temperature of the first temperature control switch is higher than that of the second temperature control switch; the sampling circuit is respectively connected with the heating circuit and the controller and is used for collecting the potential between the first temperature control switch and the second temperature control switch and the current flowing through the second temperature control switch; the controller is connected with the power supply circuit and used for receiving the sampling signal of the sampling circuit to judge the state of the steam switch, the on-off operation of the steam switch can be identified, the structure is simple, and the cost is low.
Description
Technical Field
The embodiment of the utility model provides a relate to domestic appliance technical field, especially relate to a dash and steep equipment and control circuit thereof.
Background
The existing automatic brewing equipment can automatically brew and brew drinks, and due to the accurate control of parameters such as temperature, pressure, brewing time and the like, the brewing quality is generally good and popular. Taking the coffee machine as an example, the coffee machine can realize the brewing processes of grinding, pressing, filling, removing residues by the brewing machine and the like, and has higher automation degree. However, the control circuit of the original brewing equipment cannot automatically identify the key operation of a user, has no standby state with lower power consumption, and can still maintain higher power consumption even if the brewing equipment is not used for a long time after being connected with a power supply. For example, chinese utility model patent with publication number CN207624628 discloses a high frequency drive relay control circuit, which comprises a rectifier filter circuit, a voltage regulator circuit, a relay drive circuit and a controller. However, the brewing device has high overall power consumption and is not beneficial to energy conservation and environmental protection.
In order to reduce the power consumption of the brewing device and improve the energy consumption level of the brewing device and meet the requirements of European environmental protection and energy conservation standards (ErP), the pressure type brewing device using a mechanical switch to directly connect a temperature control switch and a heating device in series needs to have the function of detecting any key operation. In order to meet the rule of ERP, a control circuit of the brewing device in the prior art is generally shown in fig. 1, and 2 relays and a plurality of voltage-regulator tubes are adopted, so that the function of identifying any key operation can be realized, but the control circuit needs a power supply with matching current exceeding 70mA, and the whole control circuit has more electronic components and higher generation cost.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned problem that exists among the prior art, the embodiment of the utility model provides a dash bubble equipment of bubble equipment's control circuit and applied this control circuit makes it can discern switching on operation and disconnection operation that the user carried out steam switch, and simple structure, and manufacturing cost is lower.
In order to solve the above problem, the embodiment of the present invention provides a technical solution:
a control circuit of brewing equipment comprises a controller, a power supply circuit, a relay driving circuit, a heating circuit and a sampling circuit, wherein the power supply circuit is used for converting an alternating current power supply into a direct current power supply with a first preset voltage;
the heating circuit comprises a heater, a first temperature control switch, a second temperature control switch and a steam switch, the heater is connected with an alternating current power supply through the relay control circuit, the heater, the first temperature control switch and the second temperature control switch are sequentially connected in series to form a loop, the steam switch is connected with the second temperature control switch in parallel, and the action temperature of the first temperature control switch is higher than that of the second temperature control switch;
the sampling circuit is respectively connected with the heating circuit and the controller and is used for collecting the electric potential between the first temperature control switch and the second temperature control switch and the current flowing through the second temperature control switch;
the controller is connected with the power supply circuit and used for receiving the sampling signal of the sampling circuit to judge the state of the steam switch. The control circuit can determine the on operation and the off operation executed by the steam switch based on the judgment of the steam switch state, and has the advantages of simple structure and lower production cost.
In some embodiments, the sampling circuit comprises;
one side of the first sampling branch is connected between the first temperature control switch and the second temperature control switch, and the other side of the first sampling branch is connected with the controller and used for collecting the potential between the first temperature control switch and the second temperature control switch;
and one side of the second sampling branch circuit is connected with the second temperature control switch, and the other side of the second sampling branch circuit is connected with the controller and is used for collecting the current flowing through the second temperature control switch.
In some embodiments, the controller instructs its internal timer to re-count when the state of the steam switch changes. The controller may instruct its internal timer to restart timing to recalculate the time that the brewing device is not operating.
In some embodiments, the control circuit further comprises a resistive load circuit connected to the power supply circuit and the controller, respectively;
when the timing time of the timer is accumulated to a first time threshold value, the controller sends a first conduction signal to the resistive load circuit to conduct the resistive load circuit, so that the voltage of the power supply circuit is reduced to a second preset voltage. The voltage of the power supply circuit is reduced through the resistance load circuit, and the overall power consumption of the brewing equipment can be reduced, so that a standby mode with low power consumption is formed, and the energy conservation and environmental protection are facilitated.
In some embodiments, the resistive load circuit includes a first resistance unit and a first switch unit connected in series, the first resistance unit is connected to the power supply circuit, the first switch unit is connected to the controller and grounded, and the first switch unit receives the first turn-on signal and is turned on, so that the power supply circuit is grounded through the first resistance unit.
In some embodiments, the control circuit further comprises:
a motor circuit connected in parallel with the heating circuit, the motor circuit including a motor switch and a motor connected in series.
In some embodiments, the motor circuit further comprises:
the third sampling branch is respectively connected with the motor circuit and the controller and used for collecting the potential of the motor circuit;
the controller is used for receiving the sampling signal of the third sampling branch circuit to judge the state of the motor switch. The state of the motor switch is determined through the third sampling branch, so that the controller can identify the operation of a user on the motor switch.
In some embodiments, the relay driving circuit includes a relay, a second switching unit, a first diode, and a first capacitor, the heating circuit is connected to an ac power source through a switch of the relay, coils of the relay are connected to the power supply circuit and the second switching unit, respectively, the second switching unit is connected to the controller and is grounded, and the first diode and the first capacitor are connected in parallel to the coil of the relay. Through setting up the first electric capacity parallelly connected with the coil of relay, can improve this relay drive circuit's interference killing feature, first diode is as freewheeling diode, can widen the power range of the coil of relay, and the coil of relay produces sudden change voltage and destroys other electronic components when avoiding the disconnection of second switch unit.
In some embodiments, the control circuit further comprises:
one side of the power switch is respectively connected with the power supply circuit and the controller, the other side of the power switch is grounded, and the power switch sends a second conduction signal to the controller when being switched on;
and the controller receives the second conduction signal and sends a third conduction signal to the relay driving circuit so as to enable the relay to conduct the heating circuit and the alternating current power supply.
In some embodiments, the control circuit further comprises at least one of:
the first indicating circuit is connected with the heating circuit in parallel and used for outputting an indicating signal when the heating circuit is powered on;
the second indicating circuit is connected with the first temperature control switch in parallel and is used for outputting an indicating signal when the first temperature control switch is disconnected;
and the third indicating circuit is connected with the second temperature control switch in parallel and is used for outputting an indicating signal when the second temperature control switch and the steam switch are both disconnected. Through setting up first indicating circuit, second indicating circuit and third indicating circuit, can make the user know heating circuit's state in real time to and whether the temperature reaches the required temperature of specific brewing mode, convenience of customers uses, can improve user experience.
A brewing device comprising a control circuit as described above.
Compared with the prior art, the utility model discloses beneficial effect lies in:
the utility model discloses dash brewing equipment's control circuit detects the electric potential between first temperature detect switch and the second temperature detect switch and the electric current of the second temperature detect switch of flowing through the sampling motor, just can realize discerning the user and to the operation of switching on and the disconnection operation of steam switch execution, simple structure, and manufacturing cost is lower.
Drawings
Fig. 1 is a schematic diagram of a control circuit of a brewing device according to an embodiment of the present invention.
Description of reference numerals:
110-a resistance-capacitance step-down circuit; 120-voltage stabilizing circuit; 200-a relay drive circuit; 300-a heating circuit; 301-a first temperature controlled switch; 302-a second temperature controlled switch; 303-steam switch; 310-a first indication circuit; 320-a second indication circuit; 330-a third indication circuit; 410-a first sampling branch; 420-a second sampling branch; 500-a resistive load circuit; 601-power switch; 700-a motor circuit; 701-a motor; 702-a motor switch; 710-third sampling branch.
Detailed Description
For better understanding of the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic diagram of a control circuit of a brewing apparatus according to an embodiment of the present invention, and as shown in fig. 1, the control circuit of the brewing apparatus according to the embodiment of the present invention includes: the device comprises a controller U1, a power supply circuit, a relay driving circuit 200, a heating circuit 300 and a sampling circuit, wherein the power supply circuit is used for converting an alternating current power supply into a direct current power supply with a first preset voltage so as to meet the power supply requirements of the direct current power supply of the controller U1 and other circuits; the heating circuit 300 is connected with an alternating current power supply through the relay driving circuit 200, and the relay driving circuit 200 is connected with the controller U1 to turn on or off the connection between the heating circuit 300 and the alternating current power supply under the control of the controller U1; the heating circuit 300 comprises a heater HEAT1, a first temperature control switch 301, a second temperature control switch 302 and a steam switch 303, the heater HEAT1 is connected with an alternating current power supply through a relay control circuit, the heater HEAT1, the first temperature control switch 301 and the second temperature control switch 302 are sequentially connected in series to form a loop, and the steam switch 303 is connected with the second temperature control switch 302 in parallel, wherein the action temperature of the first temperature control switch 301 is higher than that of the second temperature control switch 302, for example, the action temperature of the first temperature control switch 301 can be 130 ℃, and the action temperature of the second temperature control switch 302 can be 115 ℃; the sampling circuit is respectively connected with the heating circuit 300 and the controller U1 and is used for collecting the potential between the first temperature control switch 301 and the second temperature control switch 302 and the current flowing through the second temperature control switch 302; the controller U1 is connected with the power supply circuit and is used for receiving the sampling signal of the sampling circuit to judge the state of the steam switch 303, so that the on-off operation of the steam switch 303 of the brewing device can be identified, and the control circuit of the brewing device has the advantages of simple structure, low production cost and contribution to improving the market competitiveness of the brewing device.
In some embodiments, the sampling circuit may include a first sampling branch 410 and a second sampling branch 420, one side of the first sampling branch 410 is connected between the first temperature-controlled switch 301 and the second temperature-controlled switch 302, and the other side of the first sampling branch 410 is connected with the controller U1 for collecting the electric potential between the first temperature-controlled switch 301 and the second temperature-controlled switch 302; one side of the second sampling branch 420 is connected to the second temperature control switch 302, and the other side of the second sampling branch 420 is connected to the controller U1, for collecting the current flowing through the second temperature control switch 302. Therefore, the two branches are used for respectively collecting the electric potential between the two temperature control switches and the current flowing through the second temperature control switch 302, so that the accuracy of the sampling result is guaranteed.
Specifically, the heating circuit 300 may further include a resistor R19, and the second temperature controlled switch 302 may be grounded through a resistor R19, where the resistor R19 may be a constantan wire resistor. The first sampling branch 410 may include a diode D6, a resistor R13, and a resistor R14 connected in series in sequence, the resistor R14 is connected to the controller U1, the second sampling branch 420 may include a resistor R17 and a diode D4, one side of the resistor R17 is connected between the second temperature-controlled switch 302 and the resistor R19, the other side of the resistor R17 is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to the controller U1.
In a specific implementation process, when the first temperature control switch 301, the second temperature control switch 302 and the steam switch 303 are in different states, the sampling result of the first sampling branch 410 and the sampling signal state of the second sampling branch 420 can be as shown in table 1.
TABLE 1
Note: since the operating temperature of the second temperature control switch 302 is lower than the operating temperature of the first temperature control switch 301, in the non-failure state, there is no state where the first temperature control switch 301 is off and the second temperature control switch 302 is on.
As can be seen from table 1, when the sampling signals transmitted by the first sampling branch 410 and the second sampling branch 420 received by the controller U1 are in the states 1 and 3, it may be determined that the steam switch 303 is in the open state, when the sampling signals transmitted by the first sampling branch 410 and the second sampling branch 420 received by the controller U1 are in the state 2, it may be determined that the steam switch 303 is in the closed state, and if a change from the state 1 or the state 3 to the state 2 occurs, or a change from the state 2 to the state 1 or the state 3 occurs, it may be determined that the user performs an on operation or an off operation on the steam switch 303.
It should be noted that the sampling circuit is not limited to the above configuration, and as long as the potential between the first temperature control switch 301 and the second temperature control switch 302 and the current flowing through the second temperature control switch 302 can be acquired, the state of the steam switch 303 can be determined based on the determination logic in table 1, and further, the operation of the steam switch 303 by the user can be recognized based on the state change of the steam switch 303.
In some preferred embodiments, the first sampling branch 410 may further include a first filtering branch, which may include a resistor R21 and a capacitor C4 connected in parallel, one side of the resistor R21 is connected to a side of the resistor R14 away from the resistor R13, and the other side of the resistor R21 is grounded. The second sampling branch 420 may further include a second filtering branch, which may include a resistor R20 and a capacitor C6 connected in parallel, one side of the resistor R20 may be connected to the cathode of the diode D4, and the other side of the resistor R20 is grounded. By providing the filtering branches in the first sampling branch 410 and the second sampling branch 420, ground source noise can be filtered out, and the influence of the ground source noise on the sampling result can be avoided. Further, the second sampling branch 420 may further include a protection branch, and the protection branch may include a diode D5, the anode of the diode D5 is grounded, and the cathode of the diode D5 is connected to the anode of the diode D4, so as to prevent the reverse voltage from being too high and impacting the second sampling branch 420.
In some embodiments, the controller U1 instructs its internal timer to restart when the state of the steam switch 303 changes. For example, when the steam switch 303 is switched from state 1 or state 3 to state 2, indicating that the user performed an operation to close the steam switch 303, and when the steam switch 303 is switched from state 2 to state 1 or state 3, indicating that the user performed an operation to open the steam switch 303, the controller U1 may instruct its internal timer to restart timing to recalculate the time when the brewing device is not operating.
In some embodiments, the control circuit further includes a resistive load circuit 500 connected to the power supply circuit and the controller U1, respectively; when the timer counts up the time to the first time threshold, the controller U1 sends a first turn-on signal to the resistive load circuit 500 to turn on the resistive load circuit 500, so that the voltage of the power supply circuit is reduced to a second preset voltage. The first time threshold may be set according to actual needs, for example, may be set to 29 minutes, and when the timer counts up to 29 minutes, the controller U1 sends a first turn-on signal to the resistive load circuit 500 to turn on the resistive load circuit 500, so that the voltage of the time power supply circuit decreases from, for example, 70V or more to 35V or less. At the same time or before the controller U1 sends the first on signal to the resistive load circuit 500, the controller U1 may further control the relay driving circuit 200 to disconnect the heating circuit 300 from the ac power source, thereby achieving that the voltage of the power supply circuit is reduced while heating is stopped, so as to form a standby mode, in which the overall power consumption of the brewing apparatus is small, for example, less than 0.5W.
In some embodiments, the resistive load circuit 500 may include a first resistance unit and a first switch unit connected in series, the first resistance unit is connected to the power supply circuit, the first switch unit is connected to the controller U1 and grounded, the first switch unit receives the first turn-on signal and is turned on, so that the power supply circuit is grounded through the first resistance unit, so as to reduce the voltage of the power supply circuit to the second preset voltage. Specifically, the first resistor unit may include a resistor R4 and a resistor R5, the first switch unit may include a transistor Q1 and a resistor R6, a base of the transistor Q1 may be connected to the controller U1 through a resistor R6, a collector of the transistor Q1 may be connected to the power supply circuit through a resistor R4 and a resistor R5 connected in series, and an emitter of the transistor Q1 is grounded, so that the controller U1 may control the transistor Q1 to be turned on or off by sending a signal thereto.
In some embodiments, the power supply circuit may include a RC buck circuit 110 and a regulator circuit 120, wherein, the rc voltage-reducing circuit 110 may include a capacitor CX1, a capacitor CX2, a resistor RX1, a resistor RX2, a diode D1, a diode D2, a resistor R1, a resistor R2, a capacitor EC2, and a capacitor EC3, one end of the capacitor CX2 may be connected to a live wire end of an ac power supply, the other end of the capacitor CX2 is grounded, the resistor RX1 and the resistor RX2 are connected in series, the capacitor CX2 and the capacitor EC3 are connected in parallel, one end of the capacitor CX1 is connected with a live wire end of an alternating current power supply, the other end of the capacitor CX1 is connected with an anode of the diode D1 and a cathode of the diode D2 respectively, an anode of the diode D2 is grounded, one end of the capacitor EC2 is connected with a cathode of the diode D1, the other end of the capacitor EC2 is grounded, the capacitor EC3 is connected with the capacitor EC2 in parallel, the resistor R1 is connected with the resistor R2 in series, and the capacitor CX1 and the resistor EC 8652 are connected in parallel. The voltage stabilizing circuit 120 may include a resistor R23, a resistor R3, a capacitor EC1, a zener diode DZ1 and a capacitor C1, one end of the resistor R23 is connected to a cathode of the diode D1, the resistor R23, the resistor R3 and the zener diode DZ1 are connected in series, an anode of the zener diode DZ1 is grounded, the capacitor EC1 and the capacitor C1 are connected in parallel to the zener diode DZ1, and the controller U1 is connected in parallel to the zener diode DZ1, so that the power supply circuit can provide a dc power supply with a voltage of 5V to the controller U1 through the voltage stabilizing circuit 120. In a specific implementation, both the relay driver circuit 200 and the resistor load circuit 500 may be connected between the rc buck circuit 110 and the regulator circuit 120, i.e., between the diode D1 and the resistor R23, such as one end of the resistor R4 of the resistor load circuit 500 being connected to the cathode of the diode D1.
In some embodiments, the control circuit may further include a power switch 601, one side of the power switch 601 is connected to the power supply circuit and the controller U1, the other side of the power switch 601 is grounded, when the power switch 601 is turned on, the controller U1 transmits a second turn-on signal, the controller U1 receives the second turn-on signal and transmits a third turn-on signal to the relay driving circuit 200, so that the relay RYL1 turns on the heating circuit 300 and the ac power supply, and the heater HEAT1 is powered on. Of course, when the power switch 601 is turned off, the first off signal is sent to the controller U1, and the relay is controlled to disconnect the heating circuit 300 from the ac power supply and to turn off the heating circuit 300 by receiving the first off signal and sending the second off signal to the relay driving circuit 200. In one implementation, the power switch 601 may be connected in series with a resistor R12, and both may also be connected in parallel with a zener diode DZ1, and the controller U1 may be connected between the power switch 601 and the resistor R12 through a resistor R22, such that the controller U1 may receive a high signal when the power switch 601 is off and the controller U1 may receive a low signal when the power switch 601 is on. The controller U1 may also instruct its internal timer to count back up when the state of the power switch 601 changes to recalculate the time that the brewing device is not operating.
In some embodiments, the control circuit may further comprise a motor circuit 700, the motor circuit 700 being connected in parallel with the heating circuit 300, the motor circuit 700 comprising a motor switch 702 and a motor 701 connected in series. The user can start or stop the brewing device from brewing the beverage by performing an on operation or an off operation on the motor switch 702 to turn on the motor 701 or turn off the motor 701. As a preferred embodiment, the motor circuit 700 may further include: the third sampling branch 710 is respectively connected with the motor circuit 700 and the controller U1, and is used for collecting the potential of the motor circuit 700; the controller U1 is used for receiving the sampling signal of the third sampling branch 710 to determine the state of the motor switch 702 for the purpose of identifying the operation of the motor switch 702 by the user, and the controller U1 can also instruct the timer inside thereof to count again when the state of the motor switch 702 changes, so as to recalculate the time when the brewing apparatus is not operating. Specifically, the third sampling branch 710 may include a resistor R16 and a resistor R15, the controller U1 may be connected to the motor circuit 700 through the resistor R16 and the resistor R15 connected in series, when the motor switch 702 is turned on, the third sampling branch 710 may collect the pulse signal, and when the motor switch 702 is turned off, the third sampling branch may not collect the pulse signal. Further, the third sampling branch 710 may further include a third filtering branch, where the third filtering branch may include a resistor R18 and a capacitor C5, one end of the resistor R18 is connected between the resistor R15 and the controller U1, the other end of the resistor R18 is grounded, and the capacitor C5 is connected in parallel with the resistor R18, so as to improve the anti-interference capability of the third sampling branch 710 and avoid the sampling result from being affected by ground source noise.
In some embodiments, the relay driving circuit 200 includes a relay RYL1, a second switching unit, a first diode, and a first capacitor, the heating circuit 300 is connected to an ac power source through a switch of the relay RYL1, a coil of the relay RYL1 is connected to the power supply circuit and the second switching unit, respectively, the second switching unit is connected to the controller U1 and grounded, and the first diode and the first capacitor are connected in parallel to a coil of the relay RYL 1. Through setting up the first electric capacity parallelly connected with relay RYL 1's coil, can improve this relay drive circuit 200's interference killing feature, the power scope of relay RYL 1's coil can be widened as freewheeling diode to first diode, and the coil of relay RYL1 produces the sudden change voltage and destroys other electronic components when avoiding the disconnection of second switch unit. Specifically, in the embodiment of the present invention, the first capacitor is a capacitor C2, the first diode is a diode D3, the second switch unit may include a transistor Q2, a resistor R7 and a resistor R9, the base of the transistor Q2 is connected to the controller U1 through a resistor R7, the collector of the transistor Q2 is connected to the negative electrode of the diode D1 of the power supply circuit through the coil of the relay RYL1, and the emitter of the transistor Q2 is grounded through the resistor R9. When the voltage of the power supply circuit of the power supply rises to be above 70V, namely the voltage of the cathode of the diode D1 rises to be above 70V, the controller U1 can output a pulse signal with a duty ratio of 1/3 above 28KHz to the triode Q2 so as to conduct the triode Q2, electrify the coil of the relay RYL1 and attract the switch of the relay RYL1, further conduct the alternating-current power supply and the heating circuit 300, and enable the heater HEAT1 to start heating.
In some embodiments, the control circuit may further include at least one of the first indicator circuit 310, the second indicator circuit 320, and the third indicator circuit 330. The first indicator circuit 310 is connected in parallel to the heating circuit 300, and when the relay drive circuit 200 turns on the ac power supply and the heating circuit 300, the heater HEAT1 is powered on, and the first indicator circuit 310 outputs an indicator signal. Specifically, the first indicator circuit 310 may include a resistor RX1, a diode D7, and an indicator LED3 connected in series, wherein the indicator LED3 lights up when the heater HEAT1 powers up.
The second indicating circuit 320 is connected in parallel with the first temperature control switch 301, when the user selects the steam brewing mode, the steam switch 303 is manually closed, after the heater HEAT1 is powered on, the water is heated to 115 ℃ for example through the heater HEAT1, the second temperature control switch 302 is turned off, however, as the steam switch 303 is closed, the heating circuit 300 is still in a conducting state and continues to HEAT the water, until 130 ℃ is reached for example, the first temperature control switch 301 is turned off, at this time, the heating circuit 300 is turned off, the second indicating circuit 320 outputs an indicating signal to indicate the water temperature of the user to reach the temperature required by the steam brewing mode, and the motor 701 can be turned on to brew coffee for example. Specifically, the second indicating circuit 320 may include a resistor RX2, a diode D8, and an indicator LED1 connected in series, and the indicator LED1 lights up when the first temperature controlled switch 301 is turned off.
The third indicating circuit 330 is connected in parallel with the second temperature control switch 302, when the user selects the hot water brewing mode, the steam switch 303 is manually turned off, when the heater HEAT1 is powered on to HEAT the water to 115 ℃, the second temperature control switch 302 is turned off, the heating circuit 300 is powered off, the second indicating circuit 320 outputs an indicating signal to prompt the user that the water temperature reaches the temperature required by the hot water brewing mode, and the motor 701 can be turned on to brew coffee. Specifically, the third indicator circuit 330 may include a resistor RX3, a diode D9, and an indicator LED2 connected in series, and the indicator LED2 lights up when the second temperature switch 302 and the steam switch 303 are both off.
Through setting up first indicating circuit 310, second indicating circuit 320 and third indicating circuit 330, can make the user know the state of heating circuit 300 in real time to and whether the temperature reaches the required temperature of specific brewing mode, convenience of customers uses, can improve user experience.
The embodiment of the utility model also provides a brewing device, and the brewing device comprises the control circuit of any one of the above embodiments. The brewing equipment has the advantages of simple structure, low production cost, low overall power consumption and high energy consumption level.
The utility model discloses dash control circuit of bubble equipment detects the electric potential between first temperature detect switch 301 and the second temperature detect switch 302 and the electric current of second temperature detect switch 302 of flowing through sampling motor 701, just can realize discerning the user and to switch on the operation and the disconnection operation of steam switch 303 execution, simple structure, and manufacturing cost is lower.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the protection scope of the present invention is defined by the claims. Various modifications and equivalents of the invention can be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (11)
1. The control circuit of the brewing equipment is characterized by comprising a controller, a power supply circuit, a relay driving circuit, a heating circuit and a sampling circuit, wherein the power supply circuit is used for converting an alternating current power supply into a direct current power supply with a first preset voltage;
the heating circuit comprises a heater, a first temperature control switch, a second temperature control switch and a steam switch, the heater is connected with an alternating current power supply through the relay control circuit, the heater, the first temperature control switch and the second temperature control switch are sequentially connected in series to form a loop, the steam switch is connected with the second temperature control switch in parallel, and the action temperature of the first temperature control switch is higher than that of the second temperature control switch;
the sampling circuit is respectively connected with the heating circuit and the controller and is used for collecting the electric potential between the first temperature control switch and the second temperature control switch and the current flowing through the second temperature control switch;
the controller is connected with the power supply circuit and used for receiving the sampling signal of the sampling circuit to judge the state of the steam switch.
2. The control circuit of a brewing device according to claim 1, wherein the sampling circuit comprises;
one side of the first sampling branch is connected between the first temperature control switch and the second temperature control switch, and the other side of the first sampling branch is connected with the controller and used for collecting the potential between the first temperature control switch and the second temperature control switch;
and one side of the second sampling branch circuit is connected with the second temperature control switch, and the other side of the second sampling branch circuit is connected with the controller and is used for collecting the current flowing through the second temperature control switch.
3. The control circuit of a brewing device according to claim 1, wherein the controller instructs a timer inside the steam switch to re-time when the state of the steam switch changes.
4. The control circuit of the brewing device of claim 3, further comprising a resistive load circuit connected to the power supply circuit and the controller, respectively;
when the timing time of the timer is accumulated to a first time threshold value, the controller sends a first conduction signal to the resistive load circuit to conduct the resistive load circuit, so that the voltage of the power supply circuit is reduced to a second preset voltage.
5. The control circuit of the brewing device according to claim 4, wherein the resistive load circuit includes a first resistive unit and a first switching unit connected in series, the first resistive unit being connected to the power supply circuit, the first switching unit being connected to the controller and grounded, the first switching unit receiving the first turn-on signal and being turned on to ground the power supply circuit through the first resistive unit.
6. The control circuit of a brewing device according to claim 1, further comprising:
a motor circuit connected in parallel with the heating circuit, the motor circuit including a motor switch and a motor connected in series.
7. The control circuit of the brewing device of claim 6, wherein the motor circuit further comprises:
the third sampling branch is respectively connected with the motor circuit and the controller and used for collecting the potential of the motor circuit;
the controller is used for receiving the sampling signal of the third sampling branch circuit to judge the state of the motor switch.
8. The control circuit of the brewing apparatus according to claim 1, wherein the relay drive circuit comprises a relay, a second switch unit, a first diode and a first capacitor, the heating circuit is connected with an alternating current power supply through a switch of the relay, coils of the relay are respectively connected with the power supply circuit and the second switch unit, the second switch unit is connected with the controller and is grounded, and the first diode and the first capacitor are connected in parallel with the coils of the relay.
9. The control circuit of a brewing device according to claim 1, further comprising:
one side of the power switch is respectively connected with the power supply circuit and the controller, the other side of the power switch is grounded, and the power switch sends a second conduction signal to the controller when being switched on;
and the controller receives the second conduction signal and sends a third conduction signal to the relay driving circuit so as to enable the relay to conduct the heating circuit and the alternating current power supply.
10. The control circuit of a brewing device according to claim 1, further comprising at least one of the following circuits:
the first indicating circuit is connected with the heating circuit in parallel and used for outputting an indicating signal when the heating circuit is powered on;
the second indicating circuit is connected with the first temperature control switch in parallel and is used for outputting an indicating signal when the first temperature control switch is disconnected;
and the third indicating circuit is connected with the second temperature control switch in parallel and is used for outputting an indicating signal when the second temperature control switch and the steam switch are both disconnected.
11. A brewing device, characterized in that it comprises a control circuit according to any one of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922100491.8U CN210515053U (en) | 2019-11-28 | 2019-11-28 | Brewing equipment and control circuit thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113641234A (en) * | 2021-07-21 | 2021-11-12 | 深圳拓邦股份有限公司 | Power supply switching method, circuit, device and electrical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113641234A (en) * | 2021-07-21 | 2021-11-12 | 深圳拓邦股份有限公司 | Power supply switching method, circuit, device and electrical equipment |
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