Cat droppings cleaning device, control circuit of cat droppings cleaning device and cat litter machine

Abstract

The utility model relates to the technical field of cat excrement cleaning, and discloses a cat excrement cleaning device, a control circuit of the cat excrement cleaning device and a cat litter machine. The control circuit of the cat excrement cleaning device comprises a control module, a first water level detection module, a second water level detection module, a water inlet valve and a water outlet valve; when the control module detects that the liquid level of the cat excrement cleaning device reaches the position of the first liquid level sensor, a water inlet valve of the cat excrement cleaning device is controlled to be closed, and water feeding of the cat excrement cleaning device is stopped; when the first liquid level sensor breaks down, the water inlet valve cannot be closed, and the water level rises to the position of the second liquid level sensor, the control module directly controls the water outlet valve to be switched on, the device discharges water through the water outlet valve, it is ensured that the water amount in the device is just right and is maintained within the safe capacity of the device, and therefore accurate control is achieved; any overflow condition is avoided, and the reliability of the cat excrement cleaning device is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of cat feces cleaning, and in particular to a cat feces cleaning device and a control circuit thereof, and a cat litter machine. Background Art

[0002] A cat litter box is a special device for domestic cats to defecate. It imitates the natural burying behavior of cats, allowing them to meet their physiological needs safely and hygienically indoors.

[0003] In order to reduce the workload of pet owners in cleaning cat litter, the design and technology of cat litter boxes are also constantly improving. The smart cat litter box in the existing technology can use a rake or similar tool. When the cat uses it, the rake will automatically move and push the clumped cat litter into a collection container, waiting for the pet owner to clean it. Although this treatment method can manage the excrement of pet cats to a certain extent, odor control and frequent manual cleaning have always been problems that plague many pet owners. Some innovative designs use flushing cleaning to deal with the solid waste in the cat litter, aiming to provide a more hygienic and convenient solution. In the flushing cleaning solution, how to prevent overflow caused by excessive water addition has become an urgent problem that needs to be addressed. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a cat feces cleaning device and its control circuit, and a cat litter machine, which can effectively solve the problem of how to prevent overflow caused by excessive addition of water when using a flushing cleaning method to treat solid waste in cat litter.

[0005] In a first aspect, an embodiment of the present application provides a control circuit for a cat feces cleaning device, comprising: a control module, a first water level detection module, a second water level detection module, an inlet valve, and an outlet valve, wherein the input end of the first water level detection module is used to connect to a first liquid level sensor, and the output end of the first water level detection module is electrically connected to the control module; the input end of the second water level detection module is used to connect to a second liquid level sensor, and the output end of the second water level detection module is electrically connected to the control module; wherein the first liquid level sensor is disposed at a first preset position of the cat feces cleaning device, and the second liquid level sensor is disposed at a second preset position of the cat feces cleaning device, and the second preset position is higher than the first preset position;

[0006] The control module is also electrically connected to the water inlet valve and the water outlet valve respectively. The control module is used to control the water inlet valve to close when the first liquid level sensor is triggered by the liquid level; and to control the water outlet valve to open when the second liquid level sensor is triggered by the liquid level.

[0007] In some embodiments, the first water level detection module includes: a first touch chip, a first reference capacitor and a first switch tube;

[0008] The power supply terminal of the first touch chip is used to connect to a power supply, the reference signal terminal of the first touch chip is connected to one end of the first reference capacitor, the other end of the first reference capacitor is grounded, the input terminal of the first touch chip is electrically connected to the first liquid level sensor, and the output terminal of the first touch chip is connected to the controlled end of the first switch tube;

[0009] The first signal end of the first switch tube is used to connect to the power supply, and the first signal end of the first switch tube is also electrically connected to the control module through a first voltage divider resistor. The second signal end of the first switch tube is grounded.

[0010] In some embodiments, the second water level detection module includes: a second touch chip and a second reference capacitor, the power supply end of the second touch chip is used to connect to the power supply, the reference signal end of the second touch chip is connected to one end of the second reference capacitor, the other end of the second reference capacitor is grounded, the input end of the second touch chip is electrically connected to the second liquid level sensor, and the output end of the second touch chip is electrically connected to the control module.

[0011] In some embodiments, the control circuit of the cat feces cleaning device further includes: a water flow detection module, the input end of the water flow detection module is used to connect to a water flow sensor, the output end of the water flow detection module is used to connect to the control module, and the water flow sensor is arranged at a third preset position of the water inlet of the cat feces cleaning device.

[0012] In some embodiments, the water flow detection module includes: a third touch chip, a third reference capacitor and a second switch tube, the power supply end of the third touch chip is used to connect to the power supply, the reference signal end of the third touch chip is connected to one end of the third reference capacitor, and the other end of the third reference capacitor is grounded, the input end of the third touch chip is electrically connected to the water flow sensor, the output end of the third touch chip is connected to the controlled end of the second switch tube, the first signal end of the second switch tube is used to connect to the power supply, the first signal end of the second switch tube is also electrically connected to the control module through a second voltage divider resistor, and the second signal end of the second switch tube is grounded.

[0013] In some embodiments, the control circuit of the cat feces cleaning device further includes: a flow detection module, the input end of the flow detection module is used to connect a flow sensor, the output end of the flow detection module is electrically connected to the control module, and the flow sensor is arranged at a fourth preset position of the water inlet of the cat feces cleaning device.

[0014] In a second aspect, an embodiment of the present application provides a cat feces cleaning device, comprising: a cleaning mechanism and a control circuit of at least one cat feces cleaning device described in the first aspect, wherein the water inlet of the cleaning mechanism is connected to the water inlet valve, the water outlet of the cleaning mechanism is connected to the water outlet valve, the first preset position of the cleaning mechanism is provided with the first liquid level sensor, and the second preset position of the cleaning mechanism is provided with the second liquid level sensor, and the second preset position is higher than the first preset position.

[0015] In some embodiments, a water flow sensor is provided at a third preset position of the water inlet of the cleaning mechanism.

[0016] In some embodiments, a flow sensor is provided at a fourth preset position of the water inlet of the cleaning mechanism.

[0017] In a third aspect, an embodiment of the present application provides a cat litter machine, which includes at least one cat feces cleaning device described in the second aspect above.

[0018] The embodiments of the present application have the following beneficial effects:

[0019] The control circuit of the cat feces cleaning device of the present application includes: a control module, a first water level detection module, a second water level detection module, a water inlet valve and a water outlet valve. The control module is connected to a first liquid level sensor through the first water level detection module and is connected to a second liquid level sensor through the second water level detection module. The second liquid level sensor is located at a higher position than the first liquid level sensor in the cat feces cleaning device. When the control module detects that the liquid level of the cat feces cleaning device reaches the position of the first liquid level sensor, the water inlet valve of the cat feces cleaning device is controlled to be closed, and the cat feces cleaning device stops taking in water. When the control module detects that the liquid level of the cat feces cleaning device reaches the position of the second liquid level sensor, the water inlet valve of the cat feces cleaning device is controlled to be closed, and the cat feces cleaning device stops taking in water. When the position of the device is reached, the water outlet valve of the cat feces cleaning device is controlled to be turned on, and the cat feces cleaning device starts to discharge water. The cat feces cleaning device of the present application controls the water inlet of the device through the first liquid level sensor, and controls the water outlet of the device by setting the second liquid level sensor. When the first liquid level sensor fails, the water inlet valve cannot be closed. When the water level rises to the position of the second liquid level sensor, the control module directly controls the water outlet valve to be turned on, and the liquid in the device is discharged through the water outlet valve, ensuring that the amount of water in the device is just right and maintained within the safe capacity of the device, thereby achieving precise control, avoiding any overflow, and ensuring the reliability of the cat feces cleaning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A first structural schematic diagram of a control circuit of a cat feces cleaning device according to an embodiment of the present application is shown;

[0022] Figure 2 A circuit diagram of the first water level detection module according to an embodiment of the present application is shown;

[0023] Figure 3 A circuit diagram of the second water level detection module according to an embodiment of the present application is shown;

[0024] Figure 4 A second structural schematic diagram of the control circuit of the cat feces cleaning device according to an embodiment of the present application is shown;

[0025] Figure 5 A circuit diagram of a water flow detection module according to an embodiment of the present application is shown;

[0026] Figure 6 A first structural schematic diagram of a cat feces cleaning device according to an embodiment of the present application is shown.

[0027] Description of main component symbols:

[0028] 11: Control module; 12: First water level detection module; 13: Second water level detection module; 14: Water inlet valve; 15: Water outlet valve; 16: First liquid level sensor; 17: Second liquid level sensor; 18: Water flow detection module; 19: Water flow sensor; 20: Flow detection module; 21: Flow sensor; 22: Cavity; 23: Stirring rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0030] The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but rather merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0031] Hereinafter, the terms "including", "having" and their cognates used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or combinations of the aforementioned items, and should not be understood as excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the aforementioned items or adding the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the aforementioned items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0032] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meaning as in the context of the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning unless clearly defined in the various embodiments of the present application.

[0033] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0034] Considering that the existing solution adopts a flushing cleaning method to treat solid waste in cat litter, it is impossible to effectively prevent overflow caused by excessive water addition. The present application provides a cat feces cleaning device and its control circuit, and a cat litter machine. When the control module detects that the liquid level of the cat feces cleaning device reaches the position of a first liquid level sensor, the water inlet valve of the cat feces cleaning device is controlled to close, and the cat feces cleaning device stops taking in water; when the first liquid level sensor fails, the water inlet valve cannot be closed, and when the water level rises to the position of the second liquid level sensor, the control module directly controls the water outlet valve to be turned on, and the device discharges water through the water outlet valve, ensuring that the amount of water in the device is just right and maintained within the safe capacity of the device, thereby achieving precise control, avoiding any overflow, and ensuring the reliability of the cat feces cleaning device.

[0035] The control circuit of the cat feces cleaning device is described below with reference to some specific embodiments.

[0036] Figure 1A schematic diagram of the control circuit of a cat feces cleaning device according to an embodiment of the present application is shown. Exemplarily, the control circuit includes a control module 11, a first water level detection module 12, a second water level detection module 13, an inlet valve 14, and an outlet valve 15. The input of the first water level detection module 12 is connected to a first liquid level sensor 16, and the output of the first water level detection module 12 is electrically connected to the control module 11. The input of the second water level detection module 13 is connected to a second liquid level sensor 17, and the output of the second water level detection module 13 is electrically connected to the control module 11. The first liquid level sensor 16 is located at a first preset position of the cat feces cleaning device, and the second liquid level sensor 17 is located at a second preset position of the device, which is higher than the first preset position.

[0037] The first water level detection module 12 can be any type of water level detection module. Exemplarily, a touch chip is provided in the water level detection module, and the touch chip is used to collect the signal of the sensor. Furthermore, a switch element can be provided in the water level detection module, and the touch chip transmits the signal to the control module 11 through the switch element. The structures of the first water level detection module 12 and the second water level detection module 13 can be the same, and the structures of the first water level detection module 12 and the second water level detection module 13 can also be different.

[0038] The first liquid level sensor 16 can be any type of sensor. The first liquid level sensor 16 can be a float sensor, a pressure sensor, an ultrasonic sensor, a capacitive sensor, an optical sensor, etc. The first liquid level sensor 16 can be the same as the second liquid level sensor 17, or different from the second liquid level sensor 17.

[0039] The specific positions of the first liquid level sensor 16 and the second liquid level sensor 17 can be set according to actual application conditions. It can be understood that the first liquid level sensor 16 and the second liquid level sensor 17 can be set at any position of the cat feces cleaning device. Exemplarily, the first liquid level sensor 16 is set on the outer side wall of the cavity for containing liquid, and the second liquid level sensor 17 is set on the top of the cavity for containing liquid.

[0040] The control module 11 is also electrically connected to the water inlet valve 14 and the water outlet valve 15 respectively. The control module 11 is used to control the water inlet valve 14 to close when the first liquid level sensor 16 is triggered by the liquid level; and to control the water outlet valve 15 to open when the second liquid level sensor 17 is triggered by the liquid level.

[0041] Specifically, the control module 11 can be any type of control module 11, the control module 11 can be an MCU, the control module 11 can also be a CPU, the control module 11 can also be an FPGA, the control module 11 can also be a DSP, etc. Exemplarily, the control module 11 is an MCU.

[0042] The water inlet valve 14 can be any type of water valve. The water inlet valve 14 can be a gate valve, a ball valve, a butterfly valve, etc. The control module 11 can control the water inlet valve 14 through a solenoid valve, the control module 11 can also control the water inlet valve 14 through an electric valve, and the control module 11 can also control the water inlet valve 14 through a pneumatic valve. The structures of the water inlet valve 14 and the water outlet valve 15 can be the same, and the structures of the water inlet valve 14 and the water outlet valve 15 can also be different.

[0043] The control circuit of the cat feces cleaning device of this embodiment works as follows: when the first liquid level sensor 16 detects liquid, it generates a signal to the first water level detection module 12. The control module 11 obtains the signal from the first liquid level sensor 16 and controls the water inlet valve 14 of the cat feces cleaning device to close, so that the cat feces cleaning device stops taking in water. According to the specific application situation, the water outlet valve 15 is controlled to be turned on after a preset time, and the liquid in the cavity of the cat feces cleaning device flows out through the water outlet valve 15. If the first liquid level sensor 16 or the first water level detection module 12 fails, the water inlet valve 14 cannot be closed, and when the water level rises to the position of the second liquid level sensor 17, the second liquid level sensor 17 generates a signal to the second water level detection module 13. The control module 11 obtains the signal from the second liquid level sensor 17 and controls the water outlet valve 15 to be turned on, so that the liquid in the cavity of the cat feces cleaning device flows out through the water outlet valve 15.

[0044] The control circuit of the cat feces cleaning device of this embodiment is provided with a first liquid level sensor 16, so that the control module 11 controls the closing of the water inlet valve 14 according to the signal of the first liquid level sensor 16 to prevent liquid overflow from the device and realize automatic water level control. A second liquid level sensor 17 is provided, and the height of the second liquid level sensor 17 is set to be higher than the first liquid level sensor 16. This prevents the water inlet valve 14 from failing to close and causing liquid overflow when the first liquid level sensor 16 fails. This further improves the reliability of the cat feces cleaning device and greatly reduces the potential risks of the cat feces cleaning device.

[0045] In one embodiment, based on the above embodiment, Figure 2 A circuit diagram of the first water level detection module 12 of an embodiment of the present application is shown. Exemplarily, the first water level detection module 12 includes: a first touch chip U1, a first reference capacitor C1 and a first switch tube Q1.

[0046] The power supply end of the first touch chip U1 is used to connect to the power supply, the reference signal end of the first touch chip U1 is connected to one end of the first reference capacitor C1, the other end of the first reference capacitor C1 is grounded, the input end of the first touch chip U1 is electrically connected to the first liquid level sensor 16, and the output end of the first touch chip U1 is connected to the controlled end of the first switch tube Q1.

[0047] Specifically, the first touch chip U1 can be any type of touch chip. The touch chip is set to liquid detection mode to perform water level detection on the cat feces cleaning device. It can be understood that the first liquid level sensor 16 of this embodiment is a capacitive sensor. The first touch chip U1 compares the change in the capacitance of the first liquid level sensor 16 with the capacitance of the first reference capacitor C1 connected to its reference signal end. When the difference between the capacitance of the first liquid level sensor 16 and the capacitance of the first reference capacitor C1 exceeds the capacitance threshold set inside the first touch chip U1, the first touch chip U1 outputs a shutdown signal for the first switch tube Q1.

[0048] The parameters of the first reference capacitor C1 can be set according to actual application conditions. The first reference capacitor C1 greatly affects the sensitivity of liquid level detection. The first water level detection module 12 is only used to detect the water level of the liquid. Exemplarily, the first reference capacitor C1 can be set to 8PF. As another embodiment, the first reference capacitor C1 can also be a capacitor bank composed of multiple reference capacitors.

[0049] The first signal terminal of the first switch tube Q1 is used to connect to the power supply. The first signal terminal of the first switch tube Q1 is also electrically connected to the control module 11 through the first voltage divider resistor. The second signal terminal of the first switch tube Q1 is grounded.

[0050] It is understandable that the first switch tube Q1 can be any type of switch tube, such as a MOS tube, a field effect tube, a transistor, etc. Exemplarily, the first switch tube Q1 is a transistor.

[0051] The working process of the control circuit of the cat feces cleaning device of this embodiment is as follows: when the first liquid level sensor 16 is triggered by the liquid level, the first trigger chip outputs a shutdown signal of the first switch tube Q1, the first switch tube Q1 is turned off, and the control module 11 receives a high-level signal from the first signal terminal of the first switch tube Q1, and controls the water inlet valve 14 to close.

[0052] The control circuit of the cat feces cleaning device of this embodiment is equipped with a touch chip in the first water level detection module 12, and uses the touch chip to detect the liquid level. The touch chip is very sensitive to changes in capacitance and can accurately detect subtle changes in the liquid level, thereby improving the accuracy and reliability of the detection. The touch chip has a strong anti-interference ability and can effectively shield external electromagnetic interference, thereby ensuring the accuracy and stability of liquid level detection in complex environments.

[0053] In one embodiment, based on the above embodiment, Figure 3 A circuit schematic diagram of the second water level detection module 13 of an embodiment of the present application is shown. Exemplarily, the second water level detection module 13 includes: a second touch chip U2 and a second reference capacitor C2, the power supply end of the second touch chip U2 is used to connect to the power supply, the reference signal end of the second touch chip U2 is connected to one end of the second reference capacitor C2, the other end of the second reference capacitor C2 is grounded, the input end of the second touch chip U2 is electrically connected to the second liquid level sensor 17, and the output end of the second touch chip U2 is electrically connected to the control module 11.

[0054] Specifically, the second touch chip U2 can be any type of touch chip. The second touch chip U2 can be the same as the first touch chip, or the second touch chip U2 can be different from the first touch chip. The touch chip is set to liquid detection mode to perform water level detection on the cat feces cleaning device. It can be understood that the second liquid level sensor 17 of this embodiment is a capacitive sensor. The second touch chip U2 compares the capacitance of the second reference capacitor C2 connected to its reference signal end according to the change of the capacitance of the second liquid level sensor 17. When the difference between the capacitance of the second liquid level sensor 17 and the capacitance of the second reference capacitor C2 exceeds the capacitance threshold set inside the second touch chip U2, the second touch chip U2 outputs a signal when the second liquid level sensor 17 is triggered by the liquid level.

[0055] The parameters of the second reference capacitor C2 can be set according to actual application conditions. The second reference capacitor C2 greatly affects the sensitivity of liquid level detection. The second water level detection module 13 is only used to detect the water level of the liquid. Exemplarily, the second reference capacitor C2 can be set to 8.2PF. As another embodiment, the second reference capacitor C2 can also be a capacitor bank composed of multiple reference capacitors.

[0056] The working process of the control circuit of the cat feces cleaning device of this embodiment is as follows: when the second liquid level sensor 17 is triggered by the liquid level, the second trigger chip outputs a low-level signal to the control module 11. The control module 11 receives the low-level signal and controls the water outlet valve 15 to be turned on.

[0057] It is understandable that the first water level detection module 12 and the second water level detection module 13 of this embodiment are connected to the same pin of the control module 11. As other implementations, the first water level detection module 12 and the second water level detection module can also be connected to different pins of the control module 11.

[0058] The control circuit of the cat feces cleaning device of this embodiment is equipped with a touch chip in the second water level detection module 13, and uses the touch chip to detect the liquid level. The touch chip is very sensitive to changes in capacitance and can accurately detect subtle changes in the liquid level, thereby improving the accuracy and reliability of the detection. In addition, the touch chip has a strong anti-interference ability and can effectively shield external electromagnetic interference, thereby ensuring the accuracy and stability of liquid level detection in complex environments.

[0059] As an optional solution, Figure 4 Shown is another structural schematic diagram of a control circuit of a cat feces cleaning device.

[0060] In one embodiment, if Figure 4 As shown, based on the above embodiment, the control circuit of the cat feces cleaning device further includes: a water flow detection module 18, the input end of the water flow detection module 18 is used to connect to the water flow sensor 19, the output end of the water flow detection module 18 is used to connect to the control module 11, and the water flow sensor 19 is arranged at a third preset position of the water inlet of the cat feces cleaning device.

[0061] The water flow detection module 18 can only use the water flow sensor 19 to detect whether there is water flowing at the water inlet of the cat feces cleaning device. The water flow detection module 18 can also use the water flow sensor 19 to detect the flow rate of water at the water inlet of the cat feces cleaning device. Exemplarily, the water flow detection module 18 uses the water flow sensor 19 to detect whether there is water flowing at the water inlet of the cat feces cleaning device.

[0062] When water needs to be injected into the cavity of the cat feces cleaning device, if there is no water flow at the water inlet, the control device issues a water shortage warning and controls the water inlet valve 14 to open.

[0063] The position of the water flow sensor 19 can be set according to actual application conditions. It is understandable that the water flow sensor 19 can be set at any position of the cat feces cleaning device. Exemplarily, the water flow sensor 19 is set at the water inlet of the device.

[0064] The control circuit of the cat feces cleaning device of this embodiment is provided with a water flow sensor 19 at the water inlet to avoid the first liquid level sensor 16 being erroneously triggered when water is injected into the cavity of the device, resulting in the cavity of the device being unable to be injected with water, thereby greatly improving the reliability of the device.

[0065] In one embodiment, based on the above embodiment, Figure 5A circuit schematic diagram of the water flow detection module 18 of an embodiment of the present application is shown. The water flow detection module 18 includes: a third touch chip U3, a third reference capacitor C3 and a second switch tube Q2. The power supply end of the third touch chip U3 is used to connect to the power supply, the reference signal end of the third touch chip U3 is connected to one end of the third reference capacitor C3, and the other end of the third reference capacitor C3 is grounded. The input end of the third touch chip U3 is electrically connected to the water flow sensor 19, and the output end of the third touch chip U3 is connected to the controlled end of the second switch tube Q2. The first signal end of the second switch tube Q2 is used to connect to the power supply, and the first signal end of the second switch tube Q2 is also electrically connected to the control module 11 through a second voltage divider resistor. The second signal end of the second switch tube Q2 is grounded.

[0066] The water flow detection module 18 of this embodiment only uses the water flow sensor 19 to detect whether there is water flow at the water inlet of the cat feces cleaning device. Specifically, the third touch chip U3 can be any type of touch chip. The touch chip is set to liquid detection mode to detect the cat feces cleaning device. It can be understood that the water flow sensor 19 of this embodiment is a capacitive sensor. The third touch chip U3 compares the change in the capacitance of the water flow sensor 19 with the capacitance of the third reference capacitor C3 connected to its reference signal end. When the difference between the capacitance of the water flow sensor 19 and the capacitance of the third reference capacitor C3 exceeds the capacitance threshold set inside the third touch chip U3, the third touch chip U3 outputs a shutdown signal for the second switch tube Q2.

[0067] The parameters of the third reference capacitor C3 can be set according to actual application conditions. The third reference capacitor C3 greatly affects the sensitivity of liquid level detection. The water flow detection module 18 requires high sensitivity. Therefore, the third reference capacitor C3 should be as small as possible. For example, the third reference capacitor C3 can be set to 6 pF. As another embodiment, the third reference capacitor C3 can also be a capacitor bank composed of multiple reference capacitors.

[0068] It is understandable that the second switch tube Q2 can be any type of switch tube, the second switch tube Q2 can be a MOS tube, the second switch tube Q2 can also be a field effect tube, the second switch tube Q2 can also be a transistor, etc. Exemplarily, the second switch tube Q2 is a transistor.

[0069] The working process of the control circuit of the cat feces cleaning device of this embodiment is as follows: when water needs to be injected into the cavity, the water inlet valve 14 is controlled to be opened, water flows through the water inlet, the water flow sensor 19 is triggered by the liquid level, the third trigger chip outputs a shutdown signal of the second switch tube Q2, the second switch tube Q2 is turned off, the control module 11 receives a high-level signal from the first signal end of the second switch tube Q2, and no water shortage warning is issued; when no water flows through the water inlet, the third trigger chip outputs a conduction signal of the second switch tube Q2, the control module 11 receives a low-level signal from the second switch tube Q2, and a water shortage warning is issued.

[0070] The control circuit of the cat feces cleaning device of this embodiment is equipped with a touch chip in the water flow detection module 18, and uses the touch chip to detect the liquid level. The touch chip is very sensitive to changes in capacitance and can accurately detect subtle changes in the liquid level, thereby improving the accuracy and reliability of the detection. The touch chip has a strong anti-interference ability and can effectively shield external electromagnetic interference, thereby ensuring the accuracy and stability of liquid level detection in complex environments.

[0071] In one embodiment, if Figure 4 As shown, based on the above embodiment, the control circuit of the cat feces cleaning device further includes: a flow detection module 20, the input end of the flow detection module 20 is used to connect the flow sensor 21, the output end of the flow detection module 20 is electrically connected to the control module 11, and the flow sensor 21 is arranged at a fourth preset position of the water inlet of the cat feces cleaning device.

[0072] The flow sensor 21 can be any type of flow sensor. The control module 11 can obtain the water flow according to the grating of the flow sensor 21. Furthermore, a switch element can be set in the flow detection module 20, and the signal of the flow sensor 21 is transmitted to the control module 11 through the switch element.

[0073] The position of the flow sensor 21 can be set according to actual application conditions. It is understandable that the flow sensor 21 can be set at any position of the cat feces cleaning device. Exemplarily, the flow sensor 21 is set at the water inlet of the device.

[0074] The working process of the control circuit of the cat feces cleaning device of this embodiment is as follows: when water needs to be added to the cavity of the cat feces cleaning device, the water inlet valve 14 is controlled to open. If there is no water flow at the water inlet and the flow sensor 21 does not output a grating, the control device issues a water shortage warning.

[0075] The control circuit of the cat feces cleaning device of this embodiment is provided with a flow sensor 21 at the water inlet. The flow sensor 21 is combined with the water flow sensor 19 to avoid the first liquid level sensor 16 from being erroneously triggered when water is injected into the cavity of the device, resulting in the inability to inject water into the cavity of the device, thereby further improving the reliability of the device.

[0076] As an optional solution, Figure 6 Shown is a structural schematic diagram of a cat feces cleaning device.

[0077] In one embodiment, if Figure 6 As shown, the cat feces cleaning device includes: a cleaning mechanism and a control circuit of the cat feces cleaning device mentioned in any of the above embodiments, wherein the water inlet of the cleaning mechanism is connected to the water inlet valve 14, the water outlet of the cleaning mechanism is connected to the water outlet valve 15, the first preset position of the cleaning mechanism is provided with a first liquid level sensor 16, and the second preset position of the cleaning mechanism is provided with a second liquid level sensor 17, and the second preset position is higher than the first preset position.

[0078] It is understandable that the water inlet of the cleaning mechanism is the water inlet of the above-mentioned cat feces cleaning device, and the water outlet of the cleaning mechanism is the water outlet of the above-mentioned cat feces cleaning device.

[0079] The specific positions of the first liquid level sensor 16 and the second liquid level sensor 17 can be set according to actual application conditions. It can be understood that the first liquid level sensor 16 and the second liquid level sensor 17 can be set at any position of the cat feces cleaning device. Exemplarily, the first liquid level sensor 16 is set on the outer wall of the cavity 22, and the second liquid level sensor 17 is set on the top of the cavity 22.

[0080] The first liquid level sensor 16 and the second liquid level sensor 17 can be installed on the cat feces cleaning device by any installation method. In order to avoid water leakage in the cavity 22 caused by opening a hole in the side wall of the cavity 22, the first liquid level sensor 16 is exemplary adhered to the side wall of the cavity 22 2 cm away from the top of the cavity 22. The size of the first liquid level sensor 16 can be set according to actual application conditions. Exemplarily, the first liquid level sensor 16 is a flexible printed circuit sensor, i.e., an FPC sensor, and the dimensions of the first liquid level sensor 16 are 40 mm long, 12 mm wide, and 0.2 mm thick.

[0081] The second liquid level sensor 17 needs to be in contact with the liquid surface. Exemplarily, the second liquid level sensor 17 is a lead-free copper column. The assembly height of the second liquid level sensor 17 is 1 cm higher than the assembly height of the first liquid level sensor 16 .

[0082] Specifically, the cleaning mechanism includes a cavity 22 and a stirring rod 23 for stirring. The contaminated cat litter is poured into the cavity 22, and water is injected into the cavity 22 through the water inlet valve 14. When the liquid level reaches the position of the first liquid level sensor 16, the control module 11 controls the water inlet valve 14 to close. After the stirring rod 23 stirs and decomposes, the control module 11 controls the water outlet valve 15 to be turned on, and the cat litter and cat feces in the cavity 22 flow out of the cleaning device using water. Furthermore, after the control module 11 controls the water inlet valve to be closed, the stirring rod 23 can be controlled to stir after soaking for a preset time. The stirring time of the stirring rod 23 can be set according to actual application conditions. After the preset stirring time is reached, the water outlet valve 15 is turned on, and the cat litter and cat feces in the cavity 22 flow out of the cleaning device using water. The number of times water is added and the number of times of stirring can be set according to actual application conditions.

[0083] The cat feces cleaning device of this embodiment is provided with a stirring rod 23 and a cavity 22, a first liquid level sensor 16 is provided on the side wall of the cavity 22, and a second liquid level sensor 17 is provided on the top of the cavity 22, to ensure that the amount of water in the device is just right and maintained within the safe capacity of the device, thereby achieving precise control and avoiding any overflow. The contaminated cat litter is cleaned by controlling the stirring rod 23 and the water inlet valve 14 and the water outlet valve 15, and the odor is completely removed.

[0084] In one embodiment, if Figure 6 As shown, based on the above embodiment, a water flow sensor 19 is provided at the third preset position of the water inlet of the cleaning mechanism.

[0085] Exemplarily, the water flow sensor 19 is arranged on the outer wall of the entrance of the cleaning mechanism. The size of the water flow sensor 19 can be set according to the actual application situation. Exemplarily, the water flow sensor 19 is a flexible printed circuit sensor, that is, an FPC sensor. The size of the water flow sensor 19 is 60 mm long, 12 mm wide, and 0.2 mm thick.

[0086] The cat feces cleaning device of this embodiment is provided with a water flow sensor 19 at the water inlet to avoid the first liquid level sensor 16 being erroneously triggered when water is injected into the cavity 22 of the device, resulting in the cavity 22 of the device being unable to be injected with water, thereby greatly improving the reliability of the device.

[0087] In one embodiment, if Figure 6 As shown, based on the above embodiment, a flow sensor 21 is provided at the fourth preset position of the water inlet of the cleaning mechanism.

[0088] Exemplarily, when the water surface is located at the position of the first liquid level sensor 16 , the amount of water in the cavity 22 is 2.5 liters, and the statistical grating of the flow sensor 21 is 2500.

[0089] The cat feces cleaning device of this embodiment is provided with a flow sensor 21 at the water inlet. The flow sensor 21 is combined with the water flow sensor 19 to avoid the first liquid level sensor 16 from being erroneously triggered when water is injected into the cavity 22 of the device, resulting in the cavity 22 of the device being unable to be injected with water, thereby further improving the reliability of the device.

[0090] An embodiment of the present application further provides a cat litter machine. Exemplarily, the cat litter machine includes the above-mentioned cat feces cleaning device.

[0091] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed in this application, which should be covered by the scope of protection of the present application.

Claims

1. A control circuit for a cat feces cleaning device, characterized in that: include: A control module, a first water level detection module, a second water level detection module, an inlet valve, and an outlet valve, wherein the input end of the first water level detection module is used to connect to a first liquid level sensor, the output end of the first water level detection module is electrically connected to the control module, the input end of the second water level detection module is used to connect to a second liquid level sensor, and the output end of the second water level detection module is electrically connected to the control module; wherein the first liquid level sensor is arranged at a first preset position of the cat feces cleaning device, and the second liquid level sensor is arranged at a second preset position of the cat feces cleaning device, and the second preset position is higher than the first preset position; The control module is also electrically connected to the water inlet valve and the water outlet valve respectively. The control module is used to control the water inlet valve to close when the first liquid level sensor is triggered by the liquid level; and to control the water outlet valve to open when the second liquid level sensor is triggered by the liquid level.

2. The control circuit of the cat feces cleaning device according to claim 1, characterized in that: The first water level detection module includes: a first touch chip, a first reference capacitor and a first switch tube. The power supply terminal of the first touch chip is used to connect to a power supply, the reference signal terminal of the first touch chip is connected to one end of the first reference capacitor, the other end of the first reference capacitor is grounded, the input terminal of the first touch chip is electrically connected to the first liquid level sensor, and the output terminal of the first touch chip is connected to the controlled end of the first switch tube; The first signal end of the first switch tube is used to connect to the power supply, and the first signal end of the first switch tube is also electrically connected to the control module through a first voltage divider resistor. The second signal end of the first switch tube is grounded.

3. The control circuit of the cat feces cleaning device according to claim 1, characterized in that: The second water level detection module includes: a second touch chip and a second reference capacitor, the power supply end of the second touch chip is used to connect to the power supply, the reference signal end of the second touch chip is connected to one end of the second reference capacitor, the other end of the second reference capacitor is grounded, the input end of the second touch chip is electrically connected to the second liquid level sensor, and the output end of the second touch chip is electrically connected to the control module.

4. The control circuit of the cat feces cleaning device according to claim 1, characterized in that: The control circuit of the cat feces cleaning device also includes: a water flow detection module, the input end of the water flow detection module is used to connect to a water flow sensor, the output end of the water flow detection module is used to connect to the control module, and the water flow sensor is arranged at a third preset position of the water inlet of the cat feces cleaning device.

5. The control circuit of the cat feces cleaning device according to claim 4, characterized in that: The water flow detection module includes: a third touch chip, a third reference capacitor, and a second switch tube. The power supply terminal of the third touch chip is used to connect to a power supply. The reference signal terminal of the third touch chip is connected to one end of the third reference capacitor. The other end of the third reference capacitor is grounded. The input end of the third touch chip is electrically connected to the water flow sensor. The output end of the third touch chip is connected to the controlled end of the second switch tube. The first signal end of the second switch tube is used to connect to the power supply. The first signal end of the second switch tube is also electrically connected to the control module via a second voltage divider resistor. The second signal end of the second switch tube is grounded.

6. The control circuit of the cat feces cleaning device according to claim 1, characterized in that: The control circuit of the cat feces cleaning device also includes: a flow detection module, the input end of the flow detection module is used to connect to a flow sensor, the output end of the flow detection module is electrically connected to the control module, and the flow sensor is arranged at a fourth preset position of the water inlet of the cat feces cleaning device.

7. A cat feces cleaning device, characterized in that: include: A cleaning mechanism and a control circuit for a cat feces cleaning device according to any one of claims 1 to 6, wherein the water inlet of the cleaning mechanism is connected to the water inlet valve, the water outlet of the cleaning mechanism is connected to the water outlet valve, the first preset position of the cleaning mechanism is provided with the first liquid level sensor, the second preset position of the cleaning mechanism is provided with the second liquid level sensor, and the second preset position is higher than the first preset position.

8. The cat feces cleaning device according to claim 7, characterized in that: A water flow sensor is provided at the third preset position of the water inlet of the cleaning mechanism.

9. The cat feces cleaning device according to claim 7, characterized in that: A flow sensor is provided at a fourth preset position of the water inlet of the cleaning mechanism.

10. A cat litter machine, characterized in that: The cat litter machine includes the cat feces cleaning device as described in any one of claims 7 to 9.

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