Cleaning system, charging dock, and anti-sparking module

Abstract

This application discloses a cleaning system, a charging base, and a spark-proof module. The cleaning system includes at least a spark-proof module, a cleaning device, and a charging base for placing the cleaning device. The cleaning device includes a first conductive element electrically connected to a battery pack inside the cleaning device. The charging base includes a charging element electrically connected to an external power source. The charging element is used to contact the first conductive element to form a current path, allowing the external power source to supply power to the battery pack through the current path. The spark-proof module is disposed in the current path and reduces the current fluctuation amplitude in the current path by adjusting the resistance value in the current path. This application can prevent sparks from occurring between the physical connection interfaces of the charging structure.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment, and in particular to a cleaning system, a charging base, and a fireproof module. Background Technology

[0002] Existing cleaning equipment (such as robotic vacuum cleaners and floor scrubbers) typically consists of two parts: a base station and a main unit. The main unit cleans the floor, while the base station is responsible for charging, filling, and draining the main unit. The base station usually has a dedicated charging port, while the main unit has a charging plug that matches the charging port. Once the charging plug is inserted into the charging port, an electrical connection is established, allowing the base station to charge the main unit.

[0003] However, at the instantaneous moment the charging plug contacts the charging interface, the instantaneous current changes rapidly, easily triggering a momentary high voltage. This high voltage can break down the air between the charging plug and the charging interface, causing arcing and discharge between the contact points of the charging structure. When an electric spark occurs, it generates high temperature and high energy, which can cause some damage to the charging structure. If the number of electric sparks is too high or the sparks are too large, it can lead to burnout of the charging structure or a circuit break, ultimately causing the product to lose its charging function. Summary of the Invention

[0004] The purpose of this application is to provide a cleaning system, a charging base, and an anti-sparking module that can prevent sparks from being generated between the physical connection interfaces of the charging structure.

[0005] To achieve the above objectives, this application provides a cleaning system, which includes at least a fireproof module, a cleaning device, and a charging base for placing the cleaning device. The cleaning device includes a first conductive element electrically connected to a battery pack inside the cleaning device. The charging base includes a charging element electrically connected to an external power source. The charging element contacts the first conductive element to form a current path, allowing the external power source to supply power to the battery pack through the current path. The fireproof module is disposed in the current path, and by adjusting the resistance value in the current path, the fireproof module reduces the current fluctuation amplitude in the current path.

[0006] To achieve the above objectives, this application also provides a charging base, which includes a charging component and an anti-sparking module. The charging component is electrically connected to an external power source and is used to contact a first conductive component in a cleaning device to form a current path, so that the external power source provides electrical energy to the first conductive component through the current path. The anti-sparking module is disposed in the current path, and the anti-sparking module reduces the current fluctuation amplitude in the current path by adjusting the resistance value in the current path.

[0007] To achieve the above objectives, this application also provides an anti-sparking module, which is disposed in the current path formed by the first conductive element and the charging element. The anti-sparking module reduces the current fluctuation amplitude in the current path by adjusting the resistance value in the current path. The charging element is electrically connected to an external power source and is used to contact the first conductive element to form a current path, so that the external power source provides electrical energy to the first conductive element through the current path.

[0008] Therefore, the cleaning system provided in this application consists of an ignition device, a cleaning device, and a charging base. The cleaning device is equipped with a first conductive element, which is electrically connected to a battery pack located inside the cleaning device. The charging base is equipped with a charging element. The first conductive element and the charging element constitute a charging structure. When the cleaning device is placed on the charging base, the charging element can contact the first conductive element to form a current path, allowing external power to charge the battery pack through this current path. Simultaneously, an anti-sparking module is installed in the current path. When the charging element contacts the first conductive element, the anti-sparking module can gradually adjust the resistance value in the current path using a gradual adjustment method, ensuring a smooth change in current and avoiding sudden current changes. This prevents instantaneous high voltage between the charging element and the first conductive element, ultimately avoiding sparking and discharge between them. In the solution of this application, the anti-sparking module has a resistance gradient function, which allows the charging current to smoothly transition from a very small value to the rated value when the charging component and the first conductive component are in contact. This eliminates the possibility of electric sparks being generated between the physical connection interfaces of the charging structure, thereby effectively protecting the charging structure and greatly improving the user experience. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a partial structural cross-sectional view of the cleaning device and the charging base after docking in one embodiment provided in this application;

[0011] Figure 2 yes Figure 1 An enlarged view of the structure of region A in the embodiment shown;

[0012] Figure 3 This is a schematic diagram of the structure of the charging base in one embodiment provided in this application;

[0013] Figure 4 This is a schematic diagram of the charging base in another embodiment provided in this application;

[0014] Figure 5 This is a schematic diagram of the cleaning device in one embodiment provided in this application;

[0015] Figure 6 This is a schematic diagram of the cleaning device in another embodiment provided in this application;

[0016] Figure 7 yes Figure 6 An enlarged view of the structure of region B in the illustrated embodiment;

[0017] Figure 8 This is a circuit connection diagram provided in this application;

[0018] Figure 9 This is another circuit connection diagram provided in this application;

[0019] Figure 10 This is another circuit connection diagram provided in this application;

[0020] Figure 11 This is another circuit connection diagram provided in this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. Terms used in this application to indicate spatial relative positions, such as “above,” “over,” “below,” “under,” “first end,” “second end,” “one end,” and “other end,” are used for ease of explanation to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms of spatial relative positions may be intended to include different orientations of the device in use or operation other than those shown in the figures. For example, if the device in the figures is flipped, a unit described as being “below” or “under” other units or features would be located “above” other units or features. Therefore, the exemplary term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptive terms used herein will be interpreted accordingly.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," "sliding connection," "fixed," and "sleeve connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] With the rapid development of technology, people's living standards have greatly improved, and more and more families are starting to use various cleaning equipment to reduce labor intensity and improve their quality of life. Cleaning equipment on the market (such as robot vacuums and floor scrubbers) usually consists of two parts: a base station and a main unit. The main unit is used to clean the floor, while the base station can charge the main unit, add water, and perform other operations.

[0024] In practical applications, base stations are typically equipped with dedicated charging interfaces, while the main unit is equipped with a charging plug. The charging plug and the charging interface are matched to form a charging structure. When the charging plug is plugged into the charging interface, an electrical connection is established between the charging plug and the charging interface, allowing the base station to charge the main unit.

[0025] However, existing charging structures lack current regulation devices. At the instant the charging plug contacts the charging interface, a full current is applied to the circuit. This rapid change in current results in a momentary high voltage, which can break down the air between the charging plug and the charging interface, causing sparking. When this spark occurs, it generates high temperature and high energy, causing damage to the charging structure. If the sparks occur too frequently or are too large, it can lead to burnout of the charging structure or a circuit break, causing the product to quickly lose its charging function.

[0026] Therefore, how to improve the charging structure to avoid electrical sparks between the contact points of the charging structure has become an urgent issue to be addressed in this field.

[0027] To address the aforementioned problems, this application provides a cleaning system, which you may refer to. Figures 1 to 8 The cleaning system includes at least a fireproof module 1, a cleaning device 2, and a charging base 3. The cleaning device 2 includes a body and a floor brush. The charging base 3 is equipped with a support structure such as a bracket and a tray. The cleaning device 2 can be placed on the charging base 3, and the charging base 3 can use the aforementioned support structure to fix the cleaning device 2 in place. It should be noted that the cleaning device 2 can be in the form of a robotic vacuum cleaner, a floor scrubber, a window cleaning robot, or other cleaning equipment.

[0028] The cleaning device 2 is internally equipped with a rechargeable battery pack (not shown), which provides the necessary energy for the operation of the cleaning device 2. The battery pack can be a lithium-ion battery pack, a nickel-metal hydride battery pack, a nickel-cadmium battery pack, etc. Furthermore, the cleaning device 2 is equipped with a first conductive element 21, which is electrically connected to the battery pack inside the cleaning device 2. This allows an external charging source to deliver electrical energy to the battery pack through the first conductive element 21 to charge the battery pack.

[0029] The charging base 3 is equipped with a charging component 31 and a power cord. One end of the power cord is connected to a plug 321, and the other end is connected to the charging component 31. The plug 321 is used to plug into a power strip or socket to electrically connect to an external power source, such as a DC power source (e.g., a battery pack, solar panel) or an AC power source (e.g., a city power grid). When the plug 321 is electrically connected to an external power source, the charging component 31 can be considered to be electrically connected to an external power source.

[0030] In this embodiment, the first conductive element 21 and the charging element 31 can serve as a physical connection interface between the charging structures. When the cleaning device 2 is placed on the charging base 3, the charging element 31 can contact the first conductive element 21 to form a current path. In this way, an external power source can supply electrical energy to the battery pack inside the cleaning device 2 through the aforementioned current path.

[0031] In practical applications, depending on different application scenarios and requirements, as well as the actual structures of the cleaning device 2 and the charging base 3, the docking structure between the first conductive element 21 and the charging element 31 can be constructed in different forms. For example, the first conductive element 21 and the charging element 31 can adopt a plug-type docking structure, achieving physical connection through a plug and socket; they can also adopt a magnetic docking structure; or they can adopt a contact-type pin docking structure. Of course, as a variation of the plug-type docking structure, the first conductive element 21 and the charging element 31 can also be constructed as two exposed conductive contact pieces, and then achieve physical connection through the abutment of the conductive contact pieces.

[0032] The anti-sparking module 1 is installed in the aforementioned current path and has a resistance adjustment function. When the anti-sparking module 1 is working, it can slowly change the resistance value in the current path to minimize the fluctuation amplitude of the current, thereby preventing sparks from occurring between the first conductive element 21 and the charging element 31. For example, when the first conductive element 21 and the charging element 31 are in contact to form a current path, the anti-sparking module 1 can gradually adjust the resistance value in the current path to ensure a smooth change in the current and avoid sudden changes in the current. Similarly, during the process of the first conductive element 21 and the charging element 31 disengaging, the anti-sparking module 1 can also gradually adjust the resistance value in the current path to prevent sudden changes in the current value. In other words, during the process of the current path being turned on and off, the anti-sparking module 1 can adjust the resistance value to ensure that the change in the current in the current path is smooth, continuous, and without sudden changes, and that the current value in the current path does not fluctuate drastically or jump.

[0033] It should be noted that the anti-sparking module 1 can adjust its own resistance value to change the total resistance value in the current path, and can also adjust the resistance value on the charging base 3 side (or the cleaning device 2 side) in the current path. This application does not limit this.

[0034] In practical applications, the anti-spark module 1 can achieve resistance adjustment through different structures. For example, the anti-spark module 1 can have multiple current branches, each corresponding to a MOSFET electronic switch and a resistor. The resistors on different current branches have different resistance values, and these multiple current branches are connected in parallel. By controlling the opening and closing of each MOSFET electronic switch, the anti-spark module 1 can connect specific current branches into the current path. When adjusting the resistance value of the current path, the anti-spark module 1 can control the order in which the current branches are connected in the current path through a program. Since different current branches have different resistance values, connecting different current branches into the current path can continuously change the total resistance value of the current path, thereby achieving the effect of adjusting the resistance value in the current path.

[0035] In one feasible implementation, if there is a resistor with a large resistance value in the current path, the anti-sparking module 1 can adjust the resistance value to achieve the anti-sparking function. For example, the anti-sparking module 1 can first reduce the resistance value, then increase its resistance value, and finally reduce its resistance value to near zero. This adjustment method can also ensure that the current in the current path does not change abruptly, ultimately preventing sparks from being generated between the first conductive element 21 and the charging element 31.

[0036] It should be noted that when the anti-sparking module 1 adjusts the resistance value in the current path, any adjustment method that can achieve continuous change of current in the current path (including continuous change of multiple connected segments) is included within the protection scope of this application.

[0037] In one feasible implementation, the anti-sparking module 1 can be disposed on one side of the charging base 3. Specifically, the anti-sparking module 1 can be connected in series between the external power supply and the charging component 31. A resistor is provided in the internal circuit of the anti-sparking module 1, thus giving the module internal resistance. When the charging component 31 contacts the first conductive component 21 to form a current path, the anti-sparking module 1 begins to operate synchronously. Specifically, when current flows to the anti-sparking module 1, the module gradually reduces the resistance value of its internal resistor, thereby gradually reducing the total resistance value in the current path. Since the voltage remains unchanged, the current in the current path will gradually increase as the total resistance value in the current path decreases. In other words, when an external power source charges the battery pack inside the cleaning device 2, the anti-sparking module 1 can slowly reduce the total resistance value in the current path from its maximum value, thereby causing the current in the current path to slowly increase from its minimum value to the rated charging current value, so as to avoid sudden changes in the current in the current path and ultimately prevent sparks from being generated between the first conductive element 21 and the charging element 31.

[0038] Since a resistor heats up when current flows through it, the characteristics of a thermistor can be used to gradually reduce the resistance value inside the anti-sparking module 1. Specifically, in one feasible implementation, the anti-sparking module 1 includes a thermistor 11. The first terminal 111 of the thermistor 11 is electrically connected to an external power supply, and the second terminal 112 of the thermistor 11 is electrically connected to a charging component 31, so that the external power supply, thermistor 11, and charging component 31 are connected in series to form a first series branch. The thermistor 11 is a negative temperature coefficient thermistor, and its circuit diagram can be found in [reference needed]. Figure 8 .

[0039] Since the resistance of a negative temperature coefficient thermistor decreases with increasing temperature, designers can select a suitable thermistor 11 based on actual charging requirements. The thermistor 11 is then connected in series between the external power supply and the charging component 31. As the external power supply continuously charges the battery pack inside the cleaning device 2, the temperature of thermistor 11 will gradually rise, and its resistance will gradually decrease. As the resistance of thermistor 11 gradually decreases, the total resistance in the current path will also decrease. Consequently, the current in the current path will gradually increase, eventually reaching the rated charging current.

[0040] For example, assuming the selected negative temperature coefficient thermistor is model 47D-13, its nominal resistance at room temperature (25℃) is 47Ω. This thermistor is connected in series between the external power supply and the charging component 31. When the rated charging current is 2A, because the temperature of the negative temperature coefficient thermistor has not yet risen when the charging component 31 first contacts the first conductive component 21, the total resistance in the current path is very large. Consequently, the current in the current path is very small, thus avoiding sparks between the first conductive component 21 and the charging component 31. As the charging time progresses, the resistance of the negative temperature coefficient thermistor gradually decreases to 0.7Ω after a delay of several tens of seconds due to its own heating. This resistance change can smoothly control the current in the current path from small to large, reaching the rated charging current of 2A.

[0041] It should be noted that the anti-sparking module 1 can also be set on one side of the cleaning device 2. For example, the thermistor 11 can be connected in series between the first conductive element 21 and the battery pack. This connection method can also prevent the current in the current path from changing abruptly, thereby preventing sparks from being generated between the first conductive element 21 and the charging element 31.

[0042] In practical applications, when the user places the cleaning device 2 on the charging base 3 for charging, the position of the cleaning device 2 needs to be constantly adjusted to ensure that the first conductive element 21 can make full contact with the charging element 31. During the above adjustment process, the first conductive element 21 and the charging element 31 will frequently change between contact and separation. This frequent change may still have a very small chance of causing arcing between the first conductive element 21 and the charging element 31.

[0043] To address the aforementioned issues, in one feasible implementation, a time-delay switch can be connected in series in the current path. This time-delay switch is normally in an open state. When the time-delay switch is not triggered, the current path remains open even if the first conductive element 21 is in contact with the charging element 31. After the cleaning device 2 and the charging base 3 are docked, the first conductive element 21 also makes full contact with the charging element 31, and the relative positional relationship between the cleaning device 2 and the charging base 3 is fixed. Designers can set up a trigger circuit based on this relative positional relationship to ensure that the time-delay switch can be triggered after the cleaning device 2 and the charging base 3 are docked, thereby connecting the current path. For example, designers can set a microswitch on the charging base 3. When the cleaning device 2 and the charging base 3 are docked, the microswitch will be triggered to send an electrical signal to the central controller. When the central controller receives the electrical signal sent by the microswitch, it can send a command to the time-delay switch to control the time-delay switch to close and connect the current path. The above structure ensures that the current path is only opened after the first conductive element 21 and the charging element 31 have made full contact. This further reduces the possibility of electrical sparks between the first conductive element 21 and the charging element 31. The circuit diagram can be found by referring to... Figure 9 .

[0044] In the above embodiment, as the external power source continuously charges the battery pack inside the cleaning device 2, the thermistor 11 will also continuously heat up, causing additional energy consumption. This will not only increase the energy loss of the cleaning system, but also easily cause thermistor 11 to malfunction.

[0045] To address the aforementioned issues, in one feasible implementation, the anti-sparking module 1 further includes a delay circuit. A thermistor 11 is connected in parallel with this delay circuit, and a first switch 12 is provided within the delay circuit. The first switch 12 is used to connect or disconnect the delay circuit to which it resides. Its circuit diagram can be found in [reference needed]. Figure 11 .

[0046] Since the aforementioned delay circuit is connected in parallel with the thermistor 11, and no resistor is included in the delay circuit, the resistance value in the delay circuit can be approximately zero, which is much smaller than the resistance value of the thermistor 11. Therefore, when the first switch 12 is closed, the aforementioned delay circuit will conduct. According to the characteristics of parallel circuits, the current will not pass through the thermistor 11, but will instead flow through the delay circuit; that is, the thermistor 11 will be short-circuited by the aforementioned delay circuit. Because the thermistor 11 is short-circuited, it will no longer generate heat and will not cause any additional energy consumption.

[0047] It should be noted that the first switch 12 is a normally closed switch, meaning that the first switch 12 is closed (power off) under normal circumstances. When the first switch 12 is not pressed or triggered, the current in the aforementioned delay circuit cannot pass through the first switch 12. Only when the first switch 12 is pressed or triggered will it close, allowing the current to pass through the aforementioned delay circuit.

[0048] In this embodiment, the first switching element 12 can be a micro switch, a relay, or a MOSFET electronic switch. The charging base 3 can control the opening and closing state of the first switching element 12 through a central controller or other signals. For example, when the first switching element 12 is a MOSFET electronic switch, the central controller can start timing from the moment the first conductive element 21 and the charging element 31 begin to contact, and then control the first switching element 12 to close after a specific duration (e.g., 1 minute, 2 minutes) to conduct the aforementioned delay circuit. It should be noted that the aforementioned specific duration can be set according to the time constant of the thermistor 11. Alternatively, when the first switching element 12 is a micro switch, the designer can specially design the placement of the micro switch to ensure that when the cleaning device 2 is placed on the charging base 3, the first conductive element 21 first contacts the charging element 31, and then the cleaning device 2 triggers the micro switch.

[0049] like Figures 1 to 3 As shown, in one feasible embodiment, the anti-sparking module 1 includes a touch sensor and a second switch 13, wherein the second switch 13 is electrically or mechanically connected to the touch sensor. When the second switch 13 is electrically connected to the touch sensor, the second switch 13 can change its open / closed state based on a signal sent by the touch sensor. When the second switch 13 is mechanically connected to the touch sensor, the touch sensor can apply a force to the second switch 13 to change its open / closed state.

[0050] The second switch 13 is connected in series in the first series branch formed by the external power supply, thermistor 11, and charging component 31, and the second switch 13 is a normally closed switch. When the second switch 13 is not triggered, the first series branch is in the open state, and current cannot flow through the first series branch. The touch sensor is used to detect whether the cleaning device 2 is placed on the charging base 3. If the touch sensor detects that the cleaning device 2 has been placed on the charging base 3, the touch sensor will trigger the second switch 13 to change from the closed state to the open state, thereby allowing the second switch 13 to connect the aforementioned first series branch. The circuit diagram can be found in [reference needed]. Figure 10 .

[0051] For example, when the touch sensor detects that the cleaning device 2 has been placed on the charging base 3, the touch sensor can send an excitation current to the relay (i.e., the second switch 13), thereby enabling the relay to connect the first series branch. Once the first series branch is connected, current can flow through it, allowing external power to charge the battery pack inside the cleaning device 2. As charging progresses, the temperature of the thermistor 11 gradually rises, and its resistance gradually decreases. As the resistance of the thermistor 11 decreases, the total resistance in the current path also decreases. Consequently, the current in the current path gradually increases, eventually reaching the rated charging current.

[0052] It should be noted that the docking structure between the cleaning device 2 and the charging base 3, and the docking structure between the charging component 31 and the first conductive component 21, can be considered together to ensure that after the cleaning device 2 and the charging base 3 are docked, the charging component 31 can also make contact with the first conductive component 21. In this way, after the touch sensor detects that the cleaning device 2 has been placed on the charging base 3, the touch sensor can directly trigger the second switch 13 to change from the open state to the closed state.

[0053] In one feasible implementation, the touch sensor can be a lever 14, and the second switching element 13 can be a micro switch. The lever 14 is movably mounted on the charging base 3, and can move on the charging base 3 when subjected to an external force. There is a physical connection between the lever 14 and the second switching element 13. Specifically, both the micro switch and the first end 141 of the lever 14 are located inside the charging base 3. The first end 141 of the lever 14 is close to the actuating spring 131 of the micro switch; for example, the first end 141 of the lever 14 can be positioned below the actuating spring 131, and abut against the actuating spring 131. Of course, depending on the specific structure of the actuating spring 131, the relative position between the first end 141 of the lever 14 and the actuating spring 131 can be flexibly set, as long as the first end 141 of the lever 14 can apply force to the actuating spring 131.

[0054] When the cleaning device 2 is placed on the charging base 3, the cleaning device 2 can push the second end 142 of the lever 14 to move into the charging base 3, and the second end 142 of the lever 14 can drive the first end 141 of the lever 14 to move. Since the first end 141 of the lever 14 abuts against the actuating spring 131, when the first end 141 of the lever 14 moves, the first end 141 of the lever 14 can apply a force to the actuating spring 131 to drive the actuating spring 131 to trigger the micro switch.

[0055] It should be noted that designers can make special designs for the placement of the second switch 13 and the lever 14 to ensure that when the cleaning device 2 is placed on the charging base 3, the first conductive element 21 first contacts the charging element 31, and then the cleaning device 2 triggers the second switch 13 through the lever 14.

[0056] When the microswitch is triggered, it connects the first series branch. Once connected, current flows through this branch, allowing external power to charge the battery pack inside the cleaning device 2. As charging progresses, the temperature of the thermistor 11 gradually rises, and its resistance gradually decreases. This decrease in resistance leads to a decrease in the total resistance in the current path, resulting in a gradual increase in current until it reaches the rated charging current. This structure allows the current in the current path to gradually increase from a very small value to the rated charging current, thus reducing the initial contact current and preventing arcing.

[0057] Furthermore, the charging base 3 is provided with an upright wall 32, which supports and fixes the cleaning device 2. A lever 14 is provided on the side of the upright wall 32 that engages with the cleaning device 2. The second end 142 of the lever 14 extends out of the upright wall 32. When the user needs to charge the battery pack inside the cleaning device 2, they can first place the cleaning device 2 on the charging base 3, and then push the main body 22 of the cleaning device 2 towards the upright wall 32, so that the main body 22 can be engaged with the upright wall 32. Since the second end 142 of the lever 14 is exposed on the upright wall 32, during the engagement of the main body 22 of the cleaning device 2 with the upright wall 32, the main body 22 of the cleaning device 2 will push the second end 142 of the lever 14 into the upright wall 32 to trigger a microswitch located inside the upright wall 32.

[0058] In one feasible implementation, the charging component 31 is movably connected to the charging base 3. For example, if the charging component 31 is a thin sheet structure, it can be connected to the charging base 3 by a spring, so that when one side (A side) of the charging component 31 is subjected to an external force, it can move to the other side (B side). The second end 142 of the lever 14 abuts against the charging component 31, and the second end 142 of the lever 14 is located on the B side of the charging component 31. Thus, when the charging component 31 moves to the B side, it can push the second end 142 of the lever 14 into the interior of the charging base 3. Specifically, during the docking process between the first conductive member 21 and the charging component 31, the first conductive member 21 will squeeze the charging component 31, and the charging component 31 will move under the squeezing action, thereby pushing the second end 142 of the lever 14 into the interior of the charging base 3. The second end 142 of the lever 14 can then drive the first end 141 of the lever 14 to move. Since the first end 141 of the lever 14 abuts against the actuating spring 131, when the first end 141 of the lever 14 moves, the first end 141 of the lever 14 can apply a force to the actuating spring 131 to drive the actuating spring 131 to trigger the micro switch.

[0059] Since the resistance of a sliding resistor can be changed by altering the length of the resistance wire connected to the circuit, this characteristic can be utilized to gradually reduce the resistance in the current path. For example... Figure 6 , Figure 7 As shown, in one feasible implementation, the anti-sparking module 1 includes a preset resistor, and the preset resistor is connected in series with the first conductive element 21.

[0060] To utilize the principle of a sliding resistor to adjust the resistance value in the current path, a special design is needed for the charging structure between the cleaning device 2 and the charging base 3 to mimic the resistance adjustment process of a sliding rheostat. Specifically, in this embodiment, the charging base 3 is provided with a contact tower 33, and the charging component 31 is attached to the first surface 331 of the contact tower 33, close to the top of the contact tower 33. Correspondingly, the cleaning device 2 is provided with a docking groove 23, the shape of which is adapted to the shape of the contact tower 33, so that when the cleaning device 2 is placed on the charging base 3, the contact tower 33 can move from the open end 231 to the closed end 232 of the docking groove 23 to insert into the docking groove 23.

[0061] The first conductive element 21 and the preset resistor can be attached to the first surface 233 of the docking groove 23. When the contact tower 33 is inserted into the docking groove 23, the first surface 331 of the contact tower 33 can contact the first surface 233 of the docking groove 23, thereby allowing the charging element 31 to contact the first conductive element 21 and the preset resistor.

[0062] Furthermore, the preset resistor can be composed of a high-resistance wire 15 wound around a base, and the resistance of the wire 15 is proportional to its length. The resistance wire 15 can extend on the first surface 233 of the mating groove 23 according to a preset pattern, and contact the insertion direction of the contact tower 33 (i.e., Figure 7 The direction indicated by the middle arrow is approximately parallel to the extension direction of the resistance wire 15. Optionally, the resistance wire 15 extends on the first surface 233 of the mating groove 23 in a serpentine or zigzag pattern.

[0063] The starting end 151 of the resistance wire 15 is close to the open end 231 of the docking groove 23, and the ending end 152 of the resistance wire 15 is electrically connected to the first conductive element 21, which is close to the closed end 232 of the docking groove 23. Since the first surface 233 of the docking groove 23 and the first surface 331 of the contact tower 33 are both inclined structures, the charging element 31 will slide across the first surface 233 of the docking groove 23 during the insertion of the contact tower 33 into the docking groove 23. Specifically, the charging element 31 will slide from the open end 231 to the closed end 232 of the docking groove 23. Since the starting end 151 of the resistance wire 15 is close to the open end 231 of the docking groove 23, the charging element 31 will also first contact the starting end 151 of the resistance wire 15. The charging element 31, the resistance wire 15, and the first conductive element 21 are connected in series to form a second series branch. At this time, the entire length of the resistance wire 15 is connected in the second series branch, so the total resistance of the second series branch is at its maximum. It should be noted that the second series branch is part of the aforementioned current path.

[0064] As the charging component 31 slides toward the closed end 232 of the docking groove 23, it also slides from the starting end 151 of the resistance wire 15 to the ending end 152 of the resistance wire 15. This gradually reduces the length of the resistance wire 15 connected in the second series branch, thus gradually reducing the total resistance of the second series branch. Eventually, the charging component 31 will contact the first conductive component 21. During the insertion of the contact tower 33 into the docking groove 23, the current in the current path can gradually increase from a very small value to the rated charging current value. This reduces the initial contact current of the charging structure, achieving the anti-sparking effect. Simultaneously, because the resistance of the first conductive component 21 is very small, when the charging component 31 contacts the first conductive component 21, the resistance wire 15 can be considered short-circuited by the first conductive component 21. Therefore, current will not flow through the resistance wire 15, the resistance wire 15 will not heat up, and no additional energy will be consumed.

[0065] In this embodiment, the resistance wire 15 is equivalent to the resistance rail in the sliding rheostat, and the charging component 31 is equivalent to the slider in the sliding rheostat. The resistance value in the current path can be changed by moving the charging component 31. In this way, the dual anti-sparking effect can be achieved when the charging component 31 and the first conductive component 21 are initially in contact or out of contact without chip control.

[0066] In one feasible implementation, the charging base 3 can be provided with multiple contact towers 33, each contact tower 33 is provided with a charging component 31, and the charging component 31 can be located on the outside of the contact tower 33 and placed at an angle. Correspondingly, the cleaning device 2 is provided with multiple docking slots 23, each docking slot 23 is provided with a first conductive component 21. For example, the shape of the contact tower 33 can be constructed as an approximate pyramid, and the charging component 31 can be located on a triangular or quadrangular side of the pyramid structure. In this case, the charging component 31 is inclined on the contact tower 33, and the distance from the top of the charging component 31 to the center line of the charging base 3 is less than the distance from the bottom of the charging component 31 to the center line of the charging base 3. The center line of the charging base 3 is the line connecting the midpoint of the front end and the midpoint of the rear end of the charging base 3. The docking slot 23 can be constructed as a conical structure, and the first conductive component 21 is also inclined in the docking slot 23. Thus, during the docking process between the first conductive element 21 and the charging element 31, the first conductive element 21 and the charging element 31 can rub against each other, thereby removing dirt and oxide layers from their surfaces and improving conductivity. In this embodiment, the charging base 3 is provided with two contact towers 33, and correspondingly, the bottom of the floor brush or the bottom of the body of the cleaning device 2 is provided with two first conductive elements 21. It should be noted that the preset resistor can also be connected in series with the charging element 31, and its structure can refer to the embodiment where the preset resistor and the first conductive element 21 are connected in series, which will not be described in detail here.

[0067] In this embodiment, to prevent unstable contact caused by surface unevenness during the contact process between the first conductive element 21 and the charging element 31, a magnetic element is provided at the first conductive element 21 and / or the charging element 31. The magnetic element creates a magnetic attraction between the first conductive element 21 and the charging element 31, thereby ensuring stable contact between them. Specifically, the magnetic element can be provided on the surface of the first conductive element 21 and / or the charging element 31, or below the surface of the first conductive element 21 and / or the charging element 31, or around the periphery of the first conductive element 21 and / or the charging element 31.

[0068] Based on the same concept, this application also provides a charging base 3, which includes a charging component 31 and a fireproof module 1. One end of the charging component 31 is electrically connected to an external power source. Simultaneously, the charging component 31 is also used to contact a first conductive element 21 in a cleaning device 2, such as a robot vacuum cleaner, floor scrubber, or window cleaning robot, to form a current path, allowing the external power source to supply electrical energy to the first conductive element 21 through this current path. The cleaning device 2 has a rechargeable battery pack inside, and the first conductive element 21 is electrically connected to the battery pack inside the cleaning device 2. Thus, an external power source can deliver electrical energy to the battery pack through the first conductive element 21 to charge the battery pack.

[0069] The anti-sparking module 1 is installed in the aforementioned current path and has a resistance adjustment function. When the anti-sparking module 1 is working, it can perform a slow change in the resistance value in the current path to minimize the fluctuation of the current in the current path, so as to avoid sudden changes in the current in the current path and thus prevent sparks from being generated between the first conductive element 21 and the charging element 31.

[0070] For details regarding the specific structure of the charging component 31, the first conductive component 21, and the anti-sparking module 1, please refer to the above embodiments; they will not be repeated here.

[0071] Based on the same concept, this application also provides an anti-sparking module 1, which is disposed in the current path formed by the first conductive element 21 and the charging element 31, and has a resistance value adjustment function. When the anti-sparking module 1 is working, it can perform a slow change process on the resistance value in the current path to minimize the fluctuation amplitude of the current in the current path, so as to avoid sudden changes in the current in the current path, thereby preventing sparks from being generated between the first conductive element 21 and the charging element 31.

[0072] It should be noted that the first conductive element 21 and the charging element 31 can serve as a physical connection interface between the charging structures, wherein the charging element 31 acts as the charging end and the first conductive element 21 acts as the charging end. One end of the charging element 31 is electrically connected to an external power source, and one end of the first conductive element 21 is electrically connected to the rechargeable battery pack. When the charging element 31 comes into contact with the first conductive element 21, a current path can be formed, allowing the external power source to provide electrical energy to the first conductive element 21 through this current path. This electrical energy is then transferred to the battery pack through the first conductive element 21 to charge the battery pack.

[0073] Furthermore, the anti-sparking module 1 includes a thermistor 11, the first end 111 of the thermistor 11 is electrically connected to an external power source, and the second end 112 of the thermistor 11 is electrically connected to a charging component 31, so that the external power source, the thermistor 11 and the charging component 31 are connected in series to form a first series branch, wherein the thermistor 11 is a negative temperature coefficient thermistor.

[0074] Furthermore, the anti-sparking module 1 also includes a delay circuit. A first series branch consisting of an external power supply, a thermistor 11, and a charging component 31 is connected in parallel with the delay circuit, and the delay circuit is provided with a first switch 12, which is used to connect or disconnect the delay circuit. The first switch 12 is a normally closed switch.

[0075] Furthermore, the anti-sparking module 1 includes a touch sensor and a second switch 13, wherein the second switch 13 is electrically or mechanically connected to the touch sensor. When the second switch 13 is electrically connected to the touch sensor, the second switch 13 can change its open / closed state based on the signal sent by the touch sensor. When the second switch 13 is mechanically connected to the touch sensor, the touch sensor can apply a force to the second switch 13 to change its open / closed state.

[0076] The second switch 13 is connected in series in the first series branch, which is composed of an external power supply, a thermistor 11, and a charging component 31, and the second switch 13 is a normally closed switch. When the second switch 13 is not triggered, the first series branch is in an open state, and current cannot flow through it. The touch sensor detects a touch signal and triggers the second switch 13 from the closed state to the open state based on the touch signal, thereby enabling the second switch 13 to connect the first series branch.

[0077] For details on the specific structure of each component in the anti-sparking module 1, please refer to the above-described embodiments; they will not be repeated here.

[0078] The working principle of the cleaning system will be explained in detail below, taking into account specific application scenarios.

[0079] Application Scenario 1 (Taking floor scrubbers as an example)

[0080] User A purchased a cleaning system that includes a floor scrubber and a charging dock, which can charge the battery pack inside the floor scrubber.

[0081] The charging base has an upright wall that supports and secures the main body of the floor scrubber. A lever, at least partially exposed, is located on the side of the upright wall that engages with the main body of the scrubber. When the user needs to charge the battery pack inside the scrubber, they first place the scrubber on the charging base, then push the main body of the scrubber towards the upright wall, causing it to engage. Because part of the lever is exposed, during engagement, the scrubber pushes the lever inwards, triggering a microswitch located inside the upright wall.

[0082] When the microswitch is triggered, it connects the charging circuit, allowing external power to charge the battery pack inside the floor scrubber. Simultaneously, because a thermistor is connected in series in the charging circuit, its temperature gradually rises and its resistance gradually decreases as charging progresses. As the thermistor's resistance decreases, the total resistance in the charging circuit also decreases. Consequently, the current in the charging circuit gradually increases, eventually reaching the rated charging current. The thermistor allows the current in the charging circuit to gradually increase from a very small value to the rated charging current, thus reducing the initial contact current of the charging structure and eliminating the possibility of electrical sparks between the physical connection interfaces.

[0083] Application Scenario 2 (Taking floor scrubbers as an example)

[0084] User A purchased a cleaning system that includes a floor scrubber and a charging dock, which can charge the battery pack inside the floor scrubber.

[0085] The charging base is equipped with a charging component, and the floor scrubber is equipped with a first conductive component. The first conductive component and the charging component serve as a physical connection interface between the charging structures. A contact tower, approximately pyramid-shaped, is provided on the surface of the charging base. The charging component is attached to the first surface of the contact tower, near its apex. Correspondingly, a docking groove is provided at the bottom of the floor scrubber. The shape of the docking groove matches the shape of the contact tower, allowing the contact tower to move from the open end to the closed end of the docking groove when the floor scrubber is placed on the charging base, thus engaging with the groove.

[0086] A high-resistance resistance wire is connected in series on the first conductive element, and the first conductive element and the resistance wire are attached to the first surface of the mating groove. When the contact tower is inserted into the mating groove, the first surface of the contact tower can contact the first surface of the mating groove, thereby allowing the charging element to contact the first conductive element and the resistance wire. The starting end of the resistance wire is close to the open end of the mating groove, and the end of the resistance wire is electrically connected to the first conductive element, which is close to the closed end of the mating groove. Since both the first surface of the mating groove and the first surface of the contact tower are inclined structures, the charging element will slide from the open end to the closed end of the mating groove during the insertion of the contact tower. Because the starting end of the resistance wire is close to the open end of the mating groove, the charging element will also first contact the starting end of the resistance wire, at which point the entire length of the resistance wire is connected to the charging circuit.

[0087] As the charging component slides towards the closed end of the docking slot, it also slides from the beginning to the end of the resistance wire. This gradually reduces the length of the resistance wire connected in the charging circuit, thus decreasing the total resistance of the charging circuit. Eventually, the charging component will contact the first conductive element. During the insertion of the contact tower into the docking slot, the current in the charging circuit can gradually increase from a very small value to the rated charging current value. This reduces the initial contact current of the charging structure, achieving an anti-sparking effect. Simultaneously, because the resistance of the first conductive element is very small, when the charging component contacts it, the resistance wire can be considered short-circuited by the first conductive element. Therefore, current will not flow through the resistance wire, the resistance wire will not heat up, and no additional energy will be consumed.

[0088] Therefore, the cleaning system provided in this application consists of an ignition device, a cleaning device, and a charging base. The cleaning device is equipped with a first conductive element, which is electrically connected to a battery pack located inside the cleaning device. The charging base is equipped with a charging element. The first conductive element and the charging element constitute a charging structure. When the cleaning device is placed on the charging base, the charging element can contact the first conductive element to form a current path, allowing external power to charge the battery pack through this current path. Simultaneously, an anti-sparking module is installed in the current path. When the charging element contacts the first conductive element, the anti-sparking module can gradually adjust the resistance value in the current path using a gradual adjustment method, ensuring a smooth change in current and avoiding sudden current changes. This prevents instantaneous high voltage between the charging element and the first conductive element, ultimately avoiding sparking and discharge between them. In the solution of this application, the anti-sparking module has a resistance gradient function, which allows the charging current to smoothly transition from a very small value to the rated value when the charging component and the first conductive component are in contact. This eliminates the possibility of electric sparks being generated between the physical connection interfaces of the charging structure, thereby effectively protecting the charging structure and greatly improving the user experience.

[0089] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cleaning system, characterized in that, The cleaning system includes at least an anti-sparking module, a cleaning device, and a charging base for placing the cleaning device, wherein the cleaning device includes a first conductive element, which is electrically connected to a battery pack inside the cleaning device. The charging base includes a charging component, which is electrically connected to an external power source. The charging component is used to contact the first conductive component to form a current path, so that the external power source provides electrical energy to the battery pack through the current path. The anti-sparking module is installed in the current path, and the anti-sparking module reduces the current fluctuation amplitude in the current path by adjusting the resistance value in the current path. The charging base includes a contact tower, and the charging component is attached to the first surface of the contact tower; The cleaning device includes a docking groove, and the contact tower is movable from the open end of the docking groove to the closed end of the docking groove to be inserted into the docking groove; The anti-sparking module includes a preset resistor connected in series with the first conductive element, and the preset resistor and the first conductive element are attached to the first surface of the docking groove, wherein the first surface of the docking groove is used to contact the first surface of the contact tower.

2. The cleaning system according to claim 1, characterized in that, The anti-sparking module is connected in series between the external power source and the charging component. When the charging component contacts the first conductive component to form the current path, the anti-sparking module controls the current in the current path to gradually increase by gradually reducing the resistance value of the internal resistance of the module.

3. The cleaning system according to claim 2, characterized in that, The anti-sparking module includes a thermistor, the first end of which is electrically connected to the external power supply, and the second end of which is electrically connected to the charging device, so that the external power supply, the thermistor, and the charging device are connected in series to form a first series branch, wherein the thermistor is a negative temperature coefficient thermistor.

4. The cleaning system according to claim 3, characterized in that, The anti-sparking module also includes a delay circuit, which is connected in parallel with the thermistor, and the delay circuit is provided with a first switch, which is used to connect or disconnect the delay circuit.

5. The cleaning system according to claim 4, characterized in that, The first switching device is a micro switch / relay / MOSFET electronic switch.

6. The cleaning system according to claim 3, characterized in that, The anti-sparking module also includes a touch sensor and a second switch, wherein the second switch is connected to the touch sensor and is connected in series in the first series branch, wherein the second switch is a normally closed switch; The touch sensor is used to detect whether the cleaning device is placed on the charging base. If the cleaning device is placed on the charging base, the touch sensor triggers the second switch to connect the first series branch.

7. The cleaning system according to claim 6, characterized in that, The touch sensor is a lever, and the second switch is a micro switch. The lever is movably mounted on the charging base, with its first end located inside the charging base and close to the actuating spring of the micro switch. The cleaning device moves the second end of the lever into the charging base, causing the first end of the lever to trigger the micro switch by acting on the actuating spring.

8. The cleaning system according to claim 7, characterized in that, The charging base has an upright wall, wherein the upright wall is used to support and fix the cleaning device, and the lever is provided on the side of the upright wall for engaging with the cleaning device; The second end of the lever extends out of the vertical wall, and during the engagement of the cleaning device with the vertical wall, the cleaning device pushes the second end of the lever to move inward into the vertical wall.

9. The cleaning system according to claim 7, characterized in that, The charging component is movably connected to the charging base, and the second end of the lever abuts against the charging component; During the docking process between the first conductive element and the charging element, the first conductive element squeezes the charging element so that the charging element pushes the second end of the lever to move into the charging base.

10. The cleaning system according to claim 1, characterized in that, The preset resistor is a high-resistance resistance wire, and the resistance value of the resistance wire is proportional to its length.

11. The cleaning system according to claim 10, characterized in that, The resistance wire extends on the first surface of the docking groove according to a preset pattern, and the insertion direction of the contact tower is approximately parallel to the extension direction of the resistance wire.

12. The cleaning system according to claim 11, characterized in that, The starting end of the resistance wire is close to the open end of the docking groove, and the end of the resistance wire is electrically connected to the first conductive element disposed at the closed end of the docking groove. During the process of inserting the contact tower into the docking slot, the charging component first contacts the starting end of the resistance wire, so that the charging component, the resistance wire and the first conductive component are connected in series to form a second series branch, and the charging component slides from the starting end of the resistance wire to the end of the resistance wire to gradually reduce the resistance value of the second series branch.

13. The cleaning system according to claim 12, characterized in that, The resistance wire extends on the first surface of the mating groove in a serpentine or zigzag pattern.

14. A charging dock, characterized in that, The charging base includes a charging component and an anti-sparking module. The charging component is electrically connected to an external power source. The charging component is used to contact a first conductive component in the cleaning device to form a current path, so that the external power source provides electrical energy to the first conductive component through the current path. The anti-sparking module is installed in the current path, and the anti-sparking module reduces the current fluctuation amplitude in the current path by adjusting the resistance value in the current path. The charging base includes a contact tower, and the charging component is attached to the first surface of the contact tower; The contact tower can be moved from the open end of the docking slot of the cleaning device to the closed end of the docking slot to be inserted into the docking slot; The anti-sparking module includes a preset resistor. When a cleaning device is placed on the charging base, the preset resistor and a first conductive element in the cleaning device are connected in series, and the first conductive element is attached to the first surface of the docking groove, wherein the first surface of the docking groove is used to contact the first surface of the contact tower.

15. An anti-sparking module, characterized in that, The anti-sparking module is disposed in the current path formed by the first conductive element and the charging element. The anti-sparking module reduces the current fluctuation amplitude in the current path by adjusting the resistance value in the current path. The charging element is electrically connected to an external power source and is used to contact the first conductive element to form a current path, so that the external power source provides electrical energy to the first conductive element through the current path. The anti-sparking module includes a resistance wire connected in series with the first conductive element in the cleaning device. The resistance value of the resistance wire is proportional to its length. As the cleaning device is placed on the charging base, the length of the resistance wire connected in the current path gradually decreases.

16. The anti-sparking module according to claim 15, characterized in that, The anti-sparking module includes a thermistor, the first end of which is electrically connected to the external power supply, and the second end of which is electrically connected to the charging device, so that the external power supply, the thermistor, and the charging device are connected in series to form a first series branch, wherein the thermistor is a negative temperature coefficient thermistor.

17. The anti-sparking module according to claim 16, characterized in that, The anti-sparking module also includes a delay circuit, which is connected in parallel with the thermistor, and the delay circuit is provided with a first switch, which is used to connect or disconnect the delay circuit.

18. A cleaning system, characterized in that, The cleaning system includes at least an anti-sparking module, a cleaning device, and a charging base for holding the cleaning device, wherein... The cleaning device includes a first conductive element, which is electrically connected to a battery pack inside the cleaning device. The charging base includes a charging component, which is electrically connected to an external power source. The charging component is used to contact the first conductive component to form a current path, so that the external power source provides electrical energy to the battery pack through the current path. The anti-sparking module is installed in the current path, and the anti-sparking module reduces the current fluctuation amplitude in the current path by adjusting the resistance value in the current path. The anti-sparking module includes a resistance wire connected in series with the first conductive element. The resistance value of the resistance wire is proportional to its length. As the cleaning device is placed on the charging base, the length of the resistance wire connected in the current path gradually decreases.

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