Charging anti-sparking system of sweeper

Abstract

The utility model relates to the technical field of sweepers, in particular to a charging anti-sparking system of a sweeper, which comprises a charging current detection module used for detecting whether charging current exists or not and feeding back the charging current to an MCU (Microprogrammed Control Unit) controller of the sweeper; when the charging current detection module detects the current, the first switch module is switched on by a signal sent by an MCU (Microprogrammed Control Unit) of the sweeping robot; the NTC pre-charging module provides a buffer function at the moment of charging contact and outputs access current when the first switch module is switched on; and the charging output module is connected with the charging current detection module and the NTC pre-charging module and outputs charging current. According to the utility model, the phenomenon of sparking generated at the moment of contact on the charging seat of the sweeper is solved, the stability of the sweeper during charging is improved, and the service life of the sweeper is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of sweeping machines, and in particular to a fire prevention system for the charging of sweeping machines. Background Technology

[0002] With economic development and the faster pace of life, people are more willing to use technology to free their hands and reduce stress, leading to a surge in demand for technological products such as robot vacuum cleaners.

[0003] In existing technology, robotic vacuum cleaners use electrical energy to power their mechanical operation and achieve the function of sweeping. Currently, when robotic vacuum cleaners on the market are charging, the impact of the current can cause sparks between the charging contacts, which can affect the lifespan of both the dust collection base / charging station and the robotic vacuum cleaner.

[0004] Therefore, there is an urgent need to provide a fire prevention system for the charging of sweeping machines to overcome the above-mentioned defects. Utility Model Content

[0005] The main purpose of this invention is to provide a spark prevention system for the charging of a sweeping machine, which solves the problem of sparking at the moment of contact on the charging base of the sweeping machine, improves the stability of the sweeping machine during charging, and extends the service life of the sweeping machine.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The anti-sparking system for the robot vacuum cleaner's charging circuit includes:

[0008] The charging current detection module is used to detect whether there is a charging current and feed it back to the MCU controller of the sweeper;

[0009] The first switch module is activated when the charging current detection module detects current, by a signal sent by the MCU controller of the sweeping robot.

[0010] The NTC pre-charge module provides a buffer function at the moment of charging contact and outputs the input current when the first switch module is turned on; and

[0011] The charging output module is connected to the charging current detection module and the NTC pre-charging module and outputs the charging current.

[0012] Preferably, the NTC pre-charge module includes: a MOSFET switch that is turned on when the first switch module is turned on, and a charging buffer connected to the MOSFET switch.

[0013] Preferably, the charging buffer is a thermistor.

[0014] Preferably, the first switching module includes: a transistor Q2 whose base is connected to the MCU controller for sending signals via resistor R22; the collector of transistor Q2 is connected to the power supply via resistors R17 and R16, and the emitter is grounded; a resistor R23 is connected between resistor R22 and transistor Q2, and the other end of resistor R23 is grounded; the connection point between resistor R16 and resistor R17 is connected to the NTC precharge module.

[0015] Preferably, the transistor Q2 is an NPN transistor.

[0016] Preferably, the charging output module includes: a charging output interface connected to the charging current detection module, and a protector connected to the charging interface, wherein the protector is connected to the NTC pre-charging module.

[0017] Preferably, the protector is a fuse.

[0018] Preferably, the charging current detection module includes: a shunt unit through which current is received via resistor R15, a diode D2 connected to the shunt unit and a transformer, the negative terminal of the diode D2 being grounded, the diode D2 being connected in parallel with the transformer, and the transformer being connected to the charging output module.

[0019] Preferably, the shunt unit includes: a resistor R18 and a capacitor C19 connected in parallel, one end of the resistor R18 being connected to the resistor R15, the positive terminal of the diode D2 and the transformer, and the other end being grounded; one end of the capacitor C19 being connected to the resistor R15, the positive terminal of the diode D2 and the transformer, and the other end being grounded.

[0020] This utility model discloses a fire prevention system for the charging of a sweeping robot. The system includes an NTC pre-charging module. When the charging current detection module detects charging current, the MCU controller sends a signal to activate the first switch module. The NTC pre-charging module eliminates current surges when the first switch module is closed, and activates the charging output module to output charging current when the first switch module is on. This solves the problem of sparking at the moment of contact on the sweeping robot's charging dock, improves the stability of the sweeping robot during charging, and extends the service life of the sweeping robot. Attached Figure Description

[0021] Figure 1 This is a block diagram of the charging and anti-sparking system for the sweeper of this utility model.

[0022] Figure 2 This is a circuit diagram of the anti-sparking charging system for the sweeper of this utility model.

[0023] Explanation of icon numbers in the instruction manual:

[0024] 1-Current detection module, 2-First switch module, 3-NTC pre-charge module, 4-Charging output module. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] It should be noted that when a component is referred to as "connected to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] Please see Figure 1 and Figure 2The anti-sparking charging system for the robot vacuum cleaner in this embodiment includes: a charging current detection module 1, a first switch module 2, an NTC pre-charging module 3, and a charging output module 4. The charging current detection module 1 is used to detect whether there is a charging current and feed it back to the MCU controller of the robot vacuum cleaner. When the charging current detection module 1 detects the current, the first switch module 2 is activated by a signal sent by the MCU controller of the robot vacuum cleaner. The NTC pre-charging module 3 provides a buffer function at the moment of charging contact and outputs the input current when the first switch module 2 is activated. The charging output module 4 is connected to the charging current detection module 1 and the NTC pre-charging module 3 and outputs the charging current.

[0031] In a preferred embodiment, the charging current detection module 1 includes: a shunt unit that receives current through a resistor R15, a diode D2 connected to the shunt unit and a transformer, the negative terminal of the diode D2 being grounded, the diode D2 and the transformer being connected in parallel, and the transformer being connected to the charging output module 4. The shunt unit includes: a resistor R18 and a capacitor C19 connected in parallel, one end of the resistor R18 being connected to the resistor R15, the positive terminal of the diode D2 and the transformer, and the other end being grounded; one end of the capacitor C19 being connected to the resistor R15, the positive terminal of the diode D2 and the transformer, and the other end being grounded.

[0032] The first switching module 2 includes: a transistor Q2 whose base is connected to the MCU controller for sending signals via resistor R22; the collector of transistor Q2 is connected to the power supply via resistors R17 and R16, and the emitter is grounded; a resistor R23 is connected between resistor R22 and transistor Q2, and the other end of resistor R23 is grounded; the connection point between resistor R16 and resistor R17 is connected to the NTC pre-charge module 3, and transistor Q2 is an NPN transistor.

[0033] The NTC pre-charging module 3 includes: a MOSFET that is turned on when the first switch module 2 is turned on, and a charging buffer connected to the MOSFET, wherein the charging buffer is a thermistor NTC1. Specifically, when the system is connected to charging and the first switch module 2 is turned off, the charging buffer buffers the incoming current, overcoming the arcing phenomenon during charging of the sweeping robot in the prior art.

[0034] The charging output module 4 includes: a charging output interface connected to the charging current detection module 1, and a protector connected to the charging interface. The protector is connected to the NTC pre-charging module 3, and the protector is a fuse. More specifically, the fuse is a surface mount fuse PTC1.

[0035] The working principle of this utility model is as follows: At the instant charging is connected, the transistor Q2 of the first switching module 2 is cut off, and current enters the current detection module 1. Simultaneously, the thermistor NTC1 of the NTC pre-charging module 3 acts as a buffer to eliminate current surges. At this time, the current detection module 1 feeds back a signal to the MCU controller, which then sends information to transistor Q2 to turn it on. At this point, the MOS switch U4 connected to transistor Q2 is turned on, and the incoming current is output through the charging output module 4, completing the charging function. It should be noted that the MCU controller is a built-in function module of the sweeping robot, which is existing technology and therefore not described in detail here.

[0036] The NTC pre-charging module 3 of this utility model provides a pre-charging function at the moment of charging contact. The buffering effect of the thermistor NTC1 solves the problem of arcing at the moment of contact on the sweeper charging base, improves the stability of the sweeper during charging, and extends the service life of the sweeper.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fire prevention system for charging a sweeping robot, characterized in that, include: The charging current detection module is used to detect whether there is a charging current and feed it back to the MCU controller of the sweeper; The first switch module is activated when the charging current detection module detects current, by a signal sent by the MCU controller of the sweeping robot. The NTC pre-charge module provides a buffer function at the moment of charging contact and outputs the input current when the first switch module is turned on; and The charging output module is connected to the charging current detection module and the NTC pre-charging module and outputs the charging current.

2. The anti-sparking charging system for a sweeper as described in claim 1, characterized in that, The NTC pre-charge module includes: a MOSFET switch that is turned on when the first switch module is turned on, and a charging buffer connected to the MOSFET switch.

3. The anti-sparking charging system for the sweeper as described in claim 2, characterized in that, The charging buffer is a thermistor.

4. The anti-sparking charging system for the sweeper as described in claim 1, characterized in that, The first switching module includes: a transistor Q2 whose base is connected to the MCU controller for sending signals via resistor R22; the collector of transistor Q2 is connected to the power supply via resistors R17 and R16, and the emitter is grounded; a resistor R23 is connected between resistor R22 and transistor Q2, and the other end of resistor R23 is grounded; the connection point between resistor R16 and resistor R17 is connected to the NTC precharge module.

5. The anti-sparking charging system for a sweeper as described in claim 4, characterized in that, The transistor Q2 is an NPN transistor.

6. The anti-sparking charging system for a sweeper as described in claim 1, characterized in that, The charging output module includes: a charging output interface connected to the charging current detection module, and a protector connected to the charging output interface, wherein the protector is connected to the NTC pre-charging module.

7. The anti-sparking charging system for a sweeper as described in claim 6, characterized in that, The protector is a fuse.

8. The anti-sparking charging system for a sweeper as described in claim 1, characterized in that, The charging current detection module includes: a current shunt unit that receives current through resistor R15, a diode D2 connected to the current shunt unit and a transformer, the negative terminal of the diode D2 being grounded, the diode D2 being connected in parallel with the transformer, and the transformer being connected to the charging output module.

9. The anti-sparking charging system for a sweeper as described in claim 8, characterized in that, The current shunt unit includes a resistor R18 and a capacitor C19 connected in parallel. One end of the resistor R18 is connected to the resistor R15, the positive terminal of the diode D2 and the transformer, and the other end is grounded. One end of the capacitor C19 is connected to the resistor R15, the positive terminal of the diode D2 and the transformer, and the other end is grounded.

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