Charging management circuit of a cleaning system

Abstract

The utility model relates to a kind of charging management circuit of cleaning system, and the circuit includes current-limiting module, switching circuit, sampling module and microcontroller;The positive output end of workstation is connected with the positive input end of host computer through current-limiting module, switching circuit respectively, the resistance value of current-limiting module is greater than the equivalent resistance value of switching circuit, and switching circuit includes on state and cut-off state, when switching circuit is in on state, workstation carries out high-power charging to host computer;The negative output end of workstation is connected with the negative input end of host computer through sampling module, and sampling module is used to obtain circuit parameter signal of the negative input end of host computer, and microcontroller is used to control the working state of switching circuit according to circuit parameter signal.The application is based on the cooperation of current-limiting module and sampling module, the connection condition of host computer and workstation is monitored in real time, and the working state of switching circuit is controlled according to circuit parameter signal of the negative input end of host computer by microcontroller, to realize that host computer charging is safe and controllable.

Description

Technical Field

[0001] This utility model relates to the field of cleaning robot technology, and in particular to a charging management circuit for a cleaning system. Background Technology

[0002] One of the main functions of existing smart robotic vacuum cleaners on the market is automatic charging technology. Currently, most models locate their workstation by receiving infrared signals. The workstation continuously emits infrared signals, and the robotic vacuum cleaner determines its own position based on the received infrared signal area, thus guiding itself back to the charging dock. However, when the robot returns to the charging dock and contacts the charging electrodes, sparking can occur. This sparking damages the coating on the electrode surface, affecting the conductivity of the electrode contact and causing charging failure, preventing the robot from replenishing its power. Utility Model Content

[0003] Therefore, it is necessary to provide a charging management circuit for a cleaning system to address the above-mentioned problems.

[0004] This application provides a charging management circuit for a cleaning system, the cleaning system including a host and a workstation for charging the host, the circuit including a current limiting module, a switching circuit, a sampling module and a microcontroller;

[0005] The positive output terminal of the workstation is connected to the positive input terminal of the host through the current limiting module and the switching circuit. The resistance of the current limiting module is greater than the equivalent resistance of the switching circuit. The switching circuit includes a conducting state and a cut-off state. When the switching circuit is in the conducting state, the workstation charges the host at high power.

[0006] The negative output terminal of the workstation is connected to the negative input terminal of the host through the sampling module. The sampling module is used to acquire the circuit parameter signal of the negative input terminal of the host. The microcontroller is used to control the working state of the switching circuit according to the circuit parameter signal.

[0007] In one embodiment, the circuit parameter signals include voltage signals and / or current signals.

[0008] In one embodiment, the current limiting module includes a first resistor, and the switching circuit includes a second resistor, a third resistor, a fourth resistor, a first switching transistor, and a second switching transistor. The first end of the first resistor is connected to the first end of the second resistor and the first end of the first switching transistor. The second end of the second resistor is connected to the second end of the first switching transistor. The second end of the second resistor is connected to the first end of the third resistor and the control terminal of the first switching transistor. The second end of the third resistor is connected to the first end of the second switching transistor. The second end of the second switching transistor is grounded. The control terminal of the second switching transistor is connected to the microcontroller through the fourth resistor.

[0009] In one embodiment, the first switching transistor is a MOSFET, and the second switching transistor is a bipolar transistor.

[0010] In one embodiment, the switching circuit further includes a fifth resistor, the first end of which is connected to the control terminal of the second switching transistor and the second end of the fourth resistor.

[0011] In some embodiments, the sampling module includes a first diode, a sixth resistor, and a seventh resistor. The negative output terminal of the workstation is connected to the negative input terminal of the host through the first diode. The second terminal of the sixth resistor is connected to the first terminal of the seventh resistor and the positive terminal of the first diode. The second terminal of the seventh resistor is grounded. The first terminal of the sixth resistor is connected to the microcontroller to output a sampling signal.

[0012] In some embodiments, a recharge guidance circuit is further included, which is connected to the microcontroller. The recharge guidance circuit is used to send a guidance signal to guide the host back to the workstation. The microcontroller controls whether the recharge guidance circuit sends the guidance signal according to the circuit parameter signal or the operating state of the switching circuit.

[0013] In one embodiment, a power conversion circuit is further included, the input terminal of which is connected to the positive output terminal and the negative output terminal of the workstation, respectively, and the output terminal of which is connected to the power supply terminal of the microcontroller.

[0014] In one embodiment, the power conversion circuit includes an eighth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a voltage regulator chip. The positive output terminal of the workstation is connected to the input terminal of the voltage regulator chip through the eighth resistor. The input terminal of the voltage regulator chip is also connected to the first terminal of the first capacitor and the first terminal of the second capacitor. The ground terminal of the voltage regulator chip is grounded together with the second terminal of the first capacitor and the second terminal of the second capacitor. The second terminals of the third capacitor, the fourth capacitor, and the fifth capacitor are all grounded together. The output terminal of the voltage regulator chip is connected together with the first terminals of the third capacitor, the fourth capacitor, and the fifth capacitor to output the operating voltage of the microcontroller.

[0015] In one embodiment, at least one of the host and the workstation is provided with an alarm module, the alarm module is connected to the microcontroller, and the microcontroller triggers the alarm module to output a prompt signal according to the circuit parameter signal or the working state of the switching circuit.

[0016] The charging management circuit of the cleaning system in the above embodiments has at least the following advantages:

[0017] This application relates to a charging management circuit for a cleaning system. The positive output terminal of the workstation is connected to the positive input terminal of the host computer via a current-limiting module and a switching circuit. The negative output terminal of the workstation is connected to the negative input terminal of the host computer via a sampling module. When the electrode plates of the host computer and the workstation are stably connected, the positive output terminal of the workstation is connected to the positive input terminal of the host computer via the current-limiting module, and the negative input terminal of the host computer is connected to the negative output terminal of the workstation, forming a complete power supply circuit. Because the current-limiting module has a large resistance, the current output from the current-limiting module to the host computer is small, preventing contact between the electrode plates. The phenomenon of arcing occurs. The sampling module detects the circuit parameter signal at the negative input terminal of the host in real time and transmits it to the microcontroller. The microcontroller determines whether the electrode plates of the host and the workstation are reliably connected based on the received circuit parameter signal. When the microcontroller determines that the electrode plates of the host and the workstation are reliably connected, it outputs a control signal to control the switching circuit to be in the conducting state. Since the equivalent resistance of the switching circuit is less than the resistance of the current limiting module, most of the current output from the positive output terminal of the workstation is distributed to the switching circuit and then output to the host for high-power charging. This application, based on the cooperation of the current limiting module and the sampling module, monitors the connection status of the electrode plates of the host and the workstation in real time, and controls the working state of the switching circuit according to the circuit parameter signal at the negative input terminal of the host, thereby achieving the purpose of safe and controllable charging of the host. Attached Figure Description

[0018] Figure 1This is a schematic block diagram of the charging management circuit of a cleaning system in one embodiment;

[0019] Figure 2 This is a circuit diagram of the current limiting module and the switching circuit in one embodiment;

[0020] Figure 3 This is a circuit diagram of a power conversion circuit in one embodiment;

[0021] Figure 4 This is a circuit diagram of a recharge pilot circuit in one embodiment.

[0022] The correspondence between the reference numerals and the component names is as follows:

[0023] 10 current limiting modules, 20 switching circuits, 30 sampling modules, 40 microcontrollers;

[0024] R1 is the first resistor, R2 is the second resistor, R3 is the third resistor, R4 is the fourth resistor, R5 is the fifth resistor, R6 is the sixth resistor, R7 is the seventh resistor, R8 is the eighth resistor, R9 is the ninth resistor, and R10 is the tenth resistor.

[0025] C1 is the first capacitor, C2 is the second capacitor, C3 is the third capacitor, C4 is the fourth capacitor, C5 is the fifth capacitor, C6 is the sixth capacitor, and C7 is the seventh capacitor.

[0026] Q1 is the first switching transistor, Q2 is the second switching transistor, Q3 is the third switching transistor, and Q4 is the fourth switching transistor;

[0027] D1 is the first diode, IR1 is the first light-emitting diode, and U1 is the voltage regulator chip. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0030] The charging management circuit of a cleaning system according to some embodiments of the present invention is described below with reference to the accompanying drawings.

[0031] like Figure 1 As shown, this embodiment discloses a charging management circuit for a cleaning system. The cleaning system includes a host and a workstation for charging the host. The circuit includes a current limiting module 10, a switching circuit 20, a sampling module 30, and a microcontroller 40.

[0032] The positive output terminal of the workstation is connected to the positive input terminal of the host through the current limiting module 10 and the switching circuit 20 respectively. The resistance of the current limiting module 10 is greater than the equivalent resistance of the switching circuit 20. The switching circuit 20 includes a conducting state and a cut-off state. When the switching circuit 20 is in the conducting state, the workstation charges the host at high power.

[0033] The negative output terminal of the workstation is connected to the negative input terminal of the host through the sampling module 30. The sampling module 30 is used to acquire the circuit parameter signal of the negative input terminal of the host. The microcontroller 40 is used to control the working state of the switching circuit 20 according to the circuit parameter signal.

[0034] The charging management circuit of the cleaning system in this application connects the positive output terminal of the workstation to the positive input terminal of the host via a current limiting module 10 and a switching circuit 20. The negative output terminal of the workstation is connected to the negative input terminal of the host via a sampling module 30. When the electrode plates of the host and the workstation are stably connected, the positive output terminal of the workstation is connected to the positive input terminal of the host via the current limiting module 10, and the negative input terminal of the host is connected to the negative output terminal of the workstation, forming a complete power supply circuit. Because the resistance of the current limiting module 10 is relatively large, the current output from the current limiting module 10 to the host is small, preventing contact damage between the electrode plates. The phenomenon of fire is observed. The sampling module 30 detects the circuit parameter signal at the negative input terminal of the host in real time and transmits it to the microcontroller 40. The microcontroller 40 determines whether the electrode plates of the host are reliably connected to the electrode plates of the workstation based on the received circuit parameter signal. When the microcontroller 40 determines that the electrode plates of the host are reliably connected to the electrode plates of the workstation, it outputs a control signal to control the switching circuit 20 to be in the conducting state. Since the equivalent resistance value of the switching circuit 20 is less than the resistance value of the current limiting module 10, most of the current output from the positive output terminal of the workstation is distributed to the switching circuit 20 and output to the host for high-power charging. This application, based on the cooperation of the current limiting module 10 and the sampling module 30, monitors the connection status of the electrode plates of the host and the electrode plates of the workstation in real time, and controls the working state of the switching circuit 20 according to the circuit parameter signal at the negative input terminal of the host, thereby achieving the purpose of safe and controllable charging of the host.

[0035] The main unit can be a robot vacuum cleaner or a window cleaning robot.

[0036] The workstation may include a power adapter, which converts received external power signals into a first voltage signal that can be used to charge the host computer. The external power signal can be 220V AC, and the first voltage signal can be determined based on the host computer's rated charging voltage; for example, the first voltage signal can be 24V DC.

[0037] The positive output terminal of the workstation can be connected to the positive input terminal of the host through the current limiting module 10 and the switching circuit 20, respectively. The negative output terminal of the workstation can be connected to the negative input terminal of the host through the sampling module 30. Since the switching circuit 20 has a conducting state and a cutoff state, and the resistance of the current limiting module 10 is greater than the equivalent resistance of the switching circuit 20, when the switching circuit 20 is in the cutoff state, the workstation forms a loop with the host only through the current limiting module 10. Due to the large resistance in the current limiting module 10, the current output from the current limiting module 10 is very small. When the switching circuit 20 is in the conducting state, the switching circuit 20 and the current limiting module 10 form a parallel relationship. Due to the small equivalent resistance of the switching circuit 20, most of the current output from the positive output terminal of the workstation is distributed to the switching circuit 20 and output to the host for charging.

[0038] The sampling module 30 can be used to acquire circuit parameter signals at the negative input terminal of the host. The circuit parameter signals can be one or a combination of current signals and voltage signals. For example, the sampling module 30 can acquire the voltage signal at the negative input terminal of the host and transmit the acquired voltage signal to the microcontroller 40.

[0039] The microcontroller 40 can control the operating state of the switching circuit 20 based on the received circuit parameter signals. Specifically, when the electrode plates on the host and the workstation are in contact, the positive output terminal of the workstation is connected to the positive input terminal of the host via the current limiting module 10, and the negative input terminal of the host is connected to the negative output terminal of the workstation, forming a complete power supply circuit. At this time, the sampling module 30 collects the voltage signal of the negative input terminal of the host. The microcontroller 40 compares the voltage signal transmitted by the sampling module 30 with the set voltage range. If the condition is met, the microcontroller 40 considers that the electrode plates on the host and the workstation are stably connected, and outputs a control signal to control the switching circuit 20 to switch from the off state to the on state, thereby charging the host. It should be noted that when the contact between the electrode plates on the host and the workstation is unstable, the sampling module 30 cannot obtain the voltage signal of the negative input terminal of the host or the sampled voltage signal is unstable.

[0040] In addition to the features of the above embodiments, this embodiment further defines that the circuit parameter signals include voltage signals and / or current signals.

[0041] The circuit parameter signal can be one or a combination of voltage signal and circuit signal. In this embodiment, the circuit parameter signal is a voltage signal. The sampling module 30 detects the voltage signal at the negative input terminal of the host in real time and feeds it back to the microcontroller 40. The microcontroller 40 determines whether the electrode plates of the host and the electrode plates of the workstation are reliably connected based on the changes in the voltage signal at the negative input terminal of the host.

[0042] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the current limiting module 10 includes a first resistor R1, the switching circuit 20 includes a second resistor R2, a third resistor R3, a fourth resistor R4, a first switching transistor Q1, and a second switching transistor Q2. The first end of the first resistor R1 is connected to the first end of the second resistor R2 and the first end of the first switching transistor Q1. The second end of the second resistor R2 is connected to the second end of the first switching transistor Q1. The second end of the second resistor R2 is connected to the first end of the third resistor R3 and the control end of the first switching transistor Q1. The second end of the third resistor R3 is connected to the first end of the second switching transistor Q2. The second end of the second switching transistor Q2 is grounded. The control end of the second switching transistor Q2 is connected to the microcontroller 40 through the fourth resistor R4.

[0043] In this circuit, one end of the first resistor R1 is connected to the first terminal of the first switch Q1, and the other end is connected to the second terminal of the first switch Q1. The first resistor R1 forms a complete circuit with the host when the first switch Q1 is not conducting, allowing the sampling module 30 to sample the voltage signal. The first terminal of the first switch Q1 is connected to the positive output terminal of the workstation, and the second terminal is connected to the positive input terminal of the host. The control terminal is connected together with the voltage divider resistors R2 and R3. Its function is to provide high-power charging to the host using this branch of the switching circuit 20 when the first switch Q1 is conducting. The first terminal of the second switch Q2 is connected to the first terminal of the first switch Q1 through the third resistor R3 and the second resistor R2. The second terminal of the second switch Q2 is grounded. The control terminal of the second switch Q2 is connected to the microcontroller 40. Its function is to control the conduction or cutoff of the second switch Q2 according to the control signal output by the microcontroller 40, such as a high or low level signal, thereby controlling the conduction or cutoff of the first switch Q1.

[0044] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the first switch Q1 is a MOSFET and the second switch Q2 is a transistor.

[0045] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the switching circuit 20 also includes a fifth resistor R5, the first end of the fifth resistor R5 is connected to the control terminal of the second switching transistor Q2 and the second end of the fourth resistor R4.

[0046] The fifth resistor R5 can be used to increase the switching speed of the second switch Q2, thereby improving the sensitivity of the response.

[0047] like Figure 2As shown, in addition to the features of the above embodiments, this embodiment further specifies that the sampling module 30 includes a first diode D1, a sixth resistor R6 and a seventh resistor R7. The negative output terminal of the workstation is connected to the negative input terminal of the host through the first diode D1. The second terminal of the sixth resistor R6 is connected to the first terminal of the seventh resistor R7 and the positive terminal of the first diode D1. The second terminal of the seventh resistor R7 is grounded. The first terminal of the sixth resistor R6 is connected to the microcontroller 40 to output a sampling signal.

[0048] Among them, the first diode D1 can generate a voltage difference between the negative input terminal of the host and the negative output terminal of the workstation, the sixth resistor R6 can be used for series protection, and the seventh resistor R7 can be used to transmit the voltage level generated by the voltage divider to the microcontroller 40.

[0049] like Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further includes a recharge guide circuit, which is connected to the microcontroller 40. The recharge guide circuit is used to send a guide signal to guide the host back to the workstation. The microcontroller 40 controls whether the recharge guide circuit sends a guide signal according to the circuit parameter signal or the working state of the switch circuit 20.

[0050] The recharge guidance circuit provides infrared signals to the host computer to guide it back to the workstation for charging. For example, the recharge guidance circuit includes four loops controlling infrared diodes. The infrared light signals emitted by the four diodes guide the host computer to move in four different directions. Taking the control branch that sends a leftward driving command as an example, it includes a ninth resistor R9, a tenth resistor, a third switch Q3, a fourth switch Q4, and a first light-emitting diode IR1. The first end of the ninth resistor R9 is connected to the microcontroller 40. The second end of the ninth resistor R9 is connected to the control terminal of the third switch Q3 and the first end of the fourth switch Q4. The second end of the third switch Q3 is also connected to the control terminal of the fourth switch Q4 and the first end of the tenth resistor. The second end of the fourth switch Q4 and the second end of the tenth resistor are grounded. The first end of the third switch Q3 is connected to the anode of the first light-emitting diode IR1. The cathode of the first light-emitting diode IR1 is connected to the first end of the sixth capacitor C6 and the first end of the seventh capacitor C7. The second ends of the sixth capacitor C6 and the seventh capacitor C7 are grounded.

[0051] It should be noted that when the microcontroller 40 determines that the electrode plates of the host and the electrode plates of the workstation are reliably connected according to the circuit parameter signals, the microcontroller 40 controls the switching circuit 20 to conduct, thereby charging the host at high power. At the same time, the microcontroller 40 can control the recharge guide circuit to shut down to save energy.

[0052] In addition to the features of the above embodiments, this embodiment further includes a power conversion circuit, the input terminal of which is connected to the positive output terminal and the negative output terminal of the workstation, respectively, and the output terminal of which is connected to the power supply terminal of the microcontroller 40.

[0053] The power conversion circuit can be used to convert the first voltage output by the workstation to obtain a second voltage. For example, the power conversion circuit can step down the DC 24V voltage output by the workstation to obtain a DC 5V voltage and transmit it to the microcontroller 40 to power the microcontroller 40. In some embodiments, the power conversion circuit can also step down or step up the first voltage to output a third voltage to power the recharge boot circuit.

[0054] like Figure 3 As shown, in addition to the features of the above embodiments, this embodiment further defines: the power conversion circuit includes an eighth resistor R8, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a voltage regulator chip U1. The positive output terminal of the workstation is connected to the input terminal of the voltage regulator chip U1 through the eighth resistor R8. The input terminal of the voltage regulator chip U1 is also connected to the first terminal of the first capacitor C1 and the first terminal of the second capacitor C2. The ground terminal of the voltage regulator chip U1 is grounded together with the second terminal of the first capacitor C1 and the second terminal of the second capacitor C2. The second terminal of the third capacitor C3, the second terminal of the fourth capacitor C4, and the second terminal of the fifth capacitor C5 are grounded together. The output terminal of the voltage regulator chip U1 is connected together with the first terminal of the third capacitor C3, the first terminal of the fourth capacitor C4, and the first terminal of the fifth capacitor C5 to output the operating voltage of the microcontroller 40.

[0055] Among them, the eighth resistor R8 is used for current limiting, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are all used for filtering, and the voltage regulator chip U1 is used for voltage reduction or boost.

[0056] In addition to the features of the above embodiments, this embodiment further specifies that: at least one of the host and the workstation is provided with an alarm module, the alarm module is connected to the microcontroller 40, and the microcontroller 40 triggers the alarm module to output a prompt signal according to the circuit parameter signal or the working state of the switch circuit 20.

[0057] The charging management circuit of the cleaning system in the above embodiment, by setting an alarm module, can be controlled by the microcontroller 40 to output a prompt signal when an abnormal connection occurs between the electrode plate of the host and the electrode plate of the workstation, so as to remind the user to perform an abnormality check.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A charging management circuit for a cleaning system, the cleaning system comprising a main unit and a workstation for charging the main unit, characterized in that, It includes a current limiting module (10), a switching circuit (20), a sampling module (30), and a microcontroller (40); The positive output terminal of the workstation is connected to the positive input terminal of the host through the current limiting module (10) and the switching circuit (20), respectively. The resistance of the current limiting module (10) is greater than the equivalent resistance of the switching circuit (20). The switching circuit (20) includes a conducting state and a cut-off state. When the switching circuit (20) is in the conducting state, the workstation charges the host with high power. The negative output terminal of the workstation is connected to the negative input terminal of the host through the sampling module (30). The sampling module (30) is used to acquire the circuit parameter signal of the negative input terminal of the host. The microcontroller (40) is used to control the working state of the switching circuit (20) according to the circuit parameter signal.

2. The charging management circuit of the cleaning system according to claim 1, characterized in that, The circuit parameter signals include voltage signals and / or current signals.

3. The charging management circuit of the cleaning system according to claim 1, characterized in that, The current limiting module (10) includes a first resistor (R1), and the switching circuit (20) includes a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a first switching transistor (Q1), and a second switching transistor (Q2). The first end of the first resistor (R1) is connected to the first end of the second resistor (R2) and the first end of the first switching transistor (Q1). The second end of the second resistor (R2) is connected to the second end of the first switching transistor (Q1). The second end of the second resistor (R2) is connected to the first end of the third resistor (R3) and the control end of the first switching transistor (Q1). The second end of the third resistor (R3) is connected to the first end of the second switching transistor (Q2). The second end of the second switching transistor (Q2) is grounded. The control end of the second switching transistor (Q2) is connected to the microcontroller (40) through the fourth resistor (R4).

4. The charging management circuit of the cleaning system according to claim 3, characterized in that, The first switch (Q1) is a MOSFET, and the second switch (Q2) is a transistor.

5. The charging management circuit of the cleaning system according to claim 3, characterized in that, The switching circuit (20) also includes a fifth resistor (R5), the first end of which is connected to the control terminal of the second switching transistor (Q2) and the second end of the fourth resistor (R4).

6. The charging management circuit of the cleaning system according to claim 1, characterized in that, The sampling module (30) includes a first diode (D1), a sixth resistor (R6), and a seventh resistor (R7). The negative output terminal of the workstation is connected to the negative input terminal of the host through the first diode (D1). The second end of the sixth resistor (R6) is connected to the first end of the seventh resistor (R7) and the positive terminal of the first diode (D1). The second end of the seventh resistor (R7) is grounded. The first end of the sixth resistor (R6) is connected to the microcontroller (40) to output a sampling signal.

7. The charging management circuit of the cleaning system according to claim 1, characterized in that, It also includes a recharge guidance circuit, which is connected to the microcontroller (40). The recharge guidance circuit is used to send a guidance signal to guide the host back to the workstation. The microcontroller (40) controls whether the recharge guidance circuit sends the guidance signal according to the circuit parameter signal or the working state of the switch circuit (20).

8. The charging management circuit of the cleaning system according to claim 1, characterized in that, It also includes a power conversion circuit, the input terminal of which is connected to the positive output terminal and the negative output terminal of the workstation, respectively, and the output terminal of which is connected to the power supply terminal of the microcontroller (40).

9. The charging management circuit of the cleaning system according to claim 8, characterized in that, The power conversion circuit includes an eighth resistor (R8), a first capacitor (C1), a second capacitor (C2), a third capacitor (C3), a fourth capacitor (C4), a fifth capacitor (C5), and a voltage regulator chip (U1). The positive output terminal of the workstation is connected to the input terminal of the voltage regulator chip (U1) through the eighth resistor (R8). The input terminal of the voltage regulator chip (U1) is also connected to the first terminal of the first capacitor (C1) and the first terminal of the second capacitor (C2). The ground terminal of the voltage regulator chip (U1) is grounded together with the second terminal of the first capacitor (C1) and the second terminal of the second capacitor (C2). The second terminal of the third capacitor (C3), the second terminal of the fourth capacitor (C4), and the second terminal of the fifth capacitor (C5) are all grounded together. The output terminal of the voltage regulator chip (U1) is connected together with the first terminal of the third capacitor (C3), the first terminal of the fourth capacitor (C4), and the first terminal of the fifth capacitor (C5) to output the operating voltage of the microcontroller (40).

10. The charging management circuit of the cleaning system according to claim 1, characterized in that, At least one of the host and the workstation is equipped with an alarm module, which is connected to the microcontroller (40). The microcontroller (40) triggers the alarm module to output a prompt signal according to the circuit parameter signal or the working state of the switch circuit (20).

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