Automatic deodorization and disinfection intelligent cat litter box based on pressure sensor and control method

Abstract

The present invention discloses a pressure sensor-based, automatic deodorizing and disinfecting intelligent cat litter box and control method. The system specifically comprises: a chassis, a drawer for assembling cat litter within the chassis, and a slide groove on the lower surface of the drawer; a litter box body disposed above the chassis, a life detector within the litter box body for detecting pets, a carbon film pressure sensor disposed on the surface of the litter channel for collecting pressure signals, and a detachably connectable deodorizing and disinfecting device mounted on the litter box body, connected to a relay. The carbon film pressure sensor, life detector, and relay work together to intelligently switch the operating modes of various detachable disinfecting and deodorizing devices, performing ozone deodorization, ultraviolet disinfection, and ventilation on the litter box environment.

Description

Technical Field

[0001] The present invention relates to the technical field of cat litter boxes, in particular to an automatic deodorizing and disinfecting intelligent cat litter box based on a pressure sensor. Background Art

[0002] Nowadays, cat owners are much more numerous than before. When a cat is one to two months old, it needs a litter box. Therefore, as a necessity for cat owners, litter boxes occupy a significant share of the cat product market. Cat litter is a highly absorbent material used by cats to bury feces and urine. It is typically used in conjunction with a litter box. Placing cat litter in a litter box provides a small, independent, and convenient toileting area for your cat.

[0003] Cat litter boxes available on the market are categorized into two types: ordinary litter boxes and smart litter boxes. Ordinary litter boxes, depending on their construction, are classified as open, semi-enclosed, or fully enclosed containers for cat litter. These containers lack any deodorization or disinfection features and are intended solely for cats' toileting. Furthermore, fully enclosed litter boxes typically have open entrances and lack a sealing device, allowing pungent odors to escape and affect indoor air quality. If the litter box's excrement is not cleaned for extended periods, the pungent odor not only affects indoor air quality but also discourages clean-loving cats from defecating in the litter box, leading them to defecate elsewhere indoors, negating the purpose of the litter box. Smart litter boxes are available in semi-automatic and fully automatic versions. However, none of the commercially available litter boxes utilizes a pressure sensor and a life detector to simultaneously apply ozone deodorization, ultraviolet disinfection, and ventilation to the litter box to disinfect and purify the environment within.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an intelligent cat litter box with automatic deodorization and disinfection based on a pressure sensor, aiming to solve the problem that cat litter boxes in the prior art do not adopt the mutual coordinated control of the pressure sensor and the life detector to simultaneously act on the cat litter box with ozone deodorization, ultraviolet disinfection, and ventilation to disinfect and purify the environment inside the cat litter box. The cat litter box of the present invention, with the cooperation of the carbon film pressure sensor, the life detector and the relay, intelligently changes the working mode of a plurality of detachable and replaceable disinfection and deodorization equipment devices, and performs ozone deodorization, ultraviolet disinfection and ventilation on the environment inside the cat litter box.

[0006] The technical solutions of the present invention are as follows:

[0007] An automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor, comprising:

[0008] A chassis, wherein a drawer for assembling cat litter is provided in the chassis, a slide groove is provided on the lower surface of the drawer, and the drawer is pullable relative to the chassis;

[0009] A litter box body, the litter box body being arranged above the chassis, the litter box body being provided with an entrance and exit door on the side thereof, the litter box body being provided with a sand leakage corridor connected to the entrance and exit door, the sand leakage corridor being provided with holes arranged in an array, the surface of the sand leakage corridor being provided with a carbon film pressure sensor for collecting pressure signals, the litter box body being provided with a life detector for detecting a pet, the litter box body being provided with a detachably connected deodorizing and disinfecting device, the deodorizing and disinfecting device being connected to a relay; the carbon film pressure sensor and the life detector being respectively connected to a circuit board provided with a single-chip microcomputer, the circuit board being connected to the deodorizing and disinfecting device via the relay;

[0010] A slope structure is provided on the drawer at a position corresponding to the overlap of the sand leakage corridor.

[0011] The automatic deodorizing and disinfecting smart cat litter box based on the pressure sensor, wherein the carbon film of the carbon film pressure sensor is generated on the substrate by microwave plasma magnetron sputtering technology, through microwave sputtering with microwave plasma as the irradiation electron source and DC magnetron sputtering target material sputtering; the electron density in the vacuum cavity is controlled, the substrate bias voltage is between +0 and 80V, and the ultra-high current density is 100mA / cm 2 , ultra-high electron flux 1.25×10 21 mm -2 ·s -1 Ultra-high electron flux induces the growth of a large number of edge-rich graphene nanocrystals, forming a high-density graphene nanocrystalline structure film. The average thickness of the carbon film is greater than 10nm, and the carbon nanofilm is extremely smooth with a roughness of less than 2nm.

[0012] The carbon film pressure sensor is used to collect the pressure signal on the surface of the sand leakage corridor in real time, and the life detector is used to detect the life signal of the pet in the litter box body;

[0013] The single-chip microcomputer arranged on the circuit board is used to collect the pressure signal on the surface of the sand leakage corridor in real time according to the carbon film pressure sensor, and the pet life signal in the litter box body detected by the life detector, and generate a corresponding disconnection signal or connection signal. The relay switches the deodorization and disinfection device to turn off or start the deodorization and disinfection mode according to the disconnection signal or the connection signal.

[0014] The automatic deodorization and disinfection smart cat litter box based on a pressure sensor, wherein the deodorization and disinfection device includes an ozone deodorization device, an ultraviolet disinfection device and a ventilation device; the ozone deodorization device, the ultraviolet disinfection device and the ventilation device are respectively detachably arranged on the top of the litter box body.

[0015] The automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor is provided with a mounting hole on the top of the litter box body, and the ozone deodorizing device, ultraviolet disinfection device and ventilation device are respectively detachably arranged on the mounting hole on the top of the litter box body.

[0016] The automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor is provided with a convex edge at the lower inner portion of the mounting through hole, and a concave edge is provided on the outer side of the upper end of the mounting through hole; correspondingly, a boss adapted for installation with the convex edge is provided at one end of the deodorizing and disinfecting device, and a shell cap adapted for installation with the concave edge is provided at the other end of the deodorizing and disinfecting device.

[0017] The automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor is characterized in that a circle of notched latches is provided at the lower end of the litter box body, and correspondingly, a circle of raised latches is provided at the upper end of the chassis; through the cooperation between the latches and the latches, the litter box body is snap-fitted and installed on the chassis, realizing a detachable connection.

[0018] The automatic deodorizing and disinfecting smart cat litter box based on the pressure sensor, wherein the litter box body is a mushroom-shaped litter box body, and the sand leakage corridor is a ring-shaped sand leakage corridor;

[0019] The sand basin body is a cylindrical sand basin body. Correspondingly, the chassis is a cylindrical chassis, and the drawer is a circular drawer. A handle is provided on the outer side of the circular drawer.

[0020] The automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor, wherein the sand leakage corridor includes:

[0021] A corridor plane portion connected to the entrance door, wherein the holes are arranged in an array on the corridor plane portion;

[0022] One end is connected to the corridor plane portion, and the other end is connected to the corridor connecting column on the top of the sand basin body.

[0023] The automatic deodorizing and disinfecting intelligent cat litter box based on the pressure sensor further includes:

[0024] A signal amplification module connected to the carbon film pressure sensor, used to amplify the pressure signal on the surface of the sand leakage corridor collected in real time by the carbon film pressure sensor;

[0025] an analog-to-digital conversion module connected to the signal amplification module, configured to perform analog-to-digital conversion on the pressure signal amplified by the signal amplification module and convert the result into a digital pressure signal;

[0026] a single-chip microcomputer connected to the analog-to-digital conversion module and the life detector respectively;

[0027] a first transistor driving module connected to the single chip microcomputer, a first relay connected to the first transistor driving module, and the first relay connected to the ventilation fan of the ventilation device;

[0028] A second transistor driving module connected to the single-chip microcomputer, a second relay connected to the second transistor driving module, and the second relay connected to the ultraviolet disinfection device;

[0029] A third transistor driving module connected to the single chip microcomputer, a third relay connected to the third transistor driving module, and the third relay connected to the ozone deodorization device.

[0030] A control method for an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor as described above, comprising the following steps:

[0031] Control the carbon film pressure sensor set on the surface of the sand leakage corridor to detect whether there is a pressure signal in real time;

[0032] When the carbon film pressure sensor detects that there is no pressure signal, the life detector is used to detect whether there is a life signal in the sand basin body. If there is no life signal, the ventilation fan of the ventilation device is controlled to stop working, and the ultraviolet disinfection device and ozone deodorization device are controlled to start working;

[0033] When the carbon film pressure sensor detects a pressure signal, the life detector is used to detect whether there is a life signal in the sand basin body. When there is a life signal, the ventilation fan of the ventilation device is controlled to work, and the ultraviolet disinfection device and the ozone deodorization device are controlled to stop working.

[0034] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0035] The present application discloses an intelligent cat litter box with automatic deodorization and disinfection based on a pressure sensor. By setting a sand leakage corridor connected to the entrance and exit door in the main body of the litter box, the cat litter on the cat's feet can be prevented from being taken out of the litter box. By setting a carbon film pressure sensor, a life detector, and a relay, the working mode of a plurality of detachable and replaceable disinfection and deodorization equipment devices can be intelligently changed to perform ozone deodorization, ultraviolet disinfection, and ventilation on the environment in the cat litter box. This solves the problem that the cat litter box in the prior art does not adopt the mutual control of the pressure sensor and the life detector to simultaneously act on the cat litter box with ozone deodorization, ultraviolet disinfection, and ventilation to disinfect and purify the environment in the cat litter box. At the same time, the overlapping part of the drawer and the sand leakage circular corridor has a slope structure, which can effectively recycle the leaked sand and increase the effective depth of the cat litter, thereby improving the utilization rate of the cat litter. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is a schematic diagram of the three-dimensional structure of an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor in an embodiment of the present invention.

[0038] Figure 2 This is a schematic exploded view of the three-dimensional structure of an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor in an embodiment of the present invention.

[0039] Figure 3 This is a detailed schematic diagram of the internal structure of the litter box body of the automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor in an embodiment of the present invention.

[0040] Figure 4 This is a schematic diagram of the chassis structure of an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor in an embodiment of the present invention.

[0041] Figure 5 This is a schematic diagram of the connection structure between the litter box body and the chassis of the automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor in an embodiment of the present invention.

[0042] Figure 6 This is a system control block diagram of an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor in an embodiment of the present invention.

[0043] Figure 7 This is a flow chart of a control method for an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor according to an embodiment of the present invention.

[0044] Figure 8 This is a detailed flow chart of the control method of the automatic deodorization and disinfection smart cat litter box based on a pressure sensor in an embodiment of the present invention.

[0045] The parts are numbered as follows:

[0046] 1. Housing cap, 2. Deodorizing and disinfecting device, 3. Sand tray body, 4. Chassis, 5. Drawer, 6. Sand leakage corridor, 7. Relay, 8. Circuit board, 9. Life detector, 10. Mounting hole, 11. Door, 12. Corridor flat surface, 13. Slide, 14. Corridor connecting column, 15. Slope structure, 21. Boss, 31. Notched protrusion, 41. Raised slot, 121. Handle, 61. Hole, 62. Carbon film pressure sensor, 101. Convex edge, 102. Concave edge, 100. Signal amplification module, 200. Analog-to-digital conversion module, 300. Single-chip microcomputer, 400. First transistor driver module, 500. Second transistor driver module, 600. Third transistor driver module, 71. First relay, 72. Second relay, 73. Third relay. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] See Figure 1 、 Figure 2 and Figure 3 and Figure 4As shown, in one embodiment of the present invention, an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor is disclosed, wherein the automatic deodorizing and disinfecting smart cat litter box based on the pressure sensor comprises: a chassis 4 and a litter box body 3, a drawer 5 for assembling cat litter is provided in the chassis 4, and a slide groove 13 is provided on the lower surface of the drawer 5, and the drawer 5 can be pulled out relative to the chassis 4. In the embodiment of the present invention, the slide groove 13 on the lower surface of the drawer 5 can prevent the drawer from being misplaced when being pulled out; the litter box body 3 is arranged above the chassis 4, and an entry and exit door 11 is provided on the side of the litter box body 3, and a sand leakage corridor 6 connected to the entry and exit door 11 is provided in the litter box body 3, and holes 61 are arranged on the sand leakage corridor 6, which can effectively prevent pet cats from taking cat litter out; a carbon film pressure sensor 62 for collecting pressure signals is provided on the surface of the sand leakage corridor 6, which can detect whether a cat comes in through the entry and exit door 11, and if so, the pressure signal can be detected.

[0049] A life detector 9 for detecting pets is provided in the litter box body 3; a detachably connected deodorizing and disinfecting device 2 is provided on the litter box body 3, and a relay 7 is connected to the deodorizing and disinfecting device 2; the carbon film pressure sensor 62 and the life detector 9 are respectively connected to a circuit board 8 provided with a single-chip microcomputer, and the circuit board 8 is connected to the deodorizing and disinfecting device 2 through the relay 7; and a slope structure 15 is provided on the drawer 5 at a position corresponding to the overlapping position of the sand leakage corridor 6.

[0050] In the automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor in an embodiment of the present invention, when working, the carbon film pressure sensor 62 will perform real-time detection. When the pet cat enters the sand leakage corridor 6 of the cat litter box, the carbon film pressure sensor 62 will collect a pressure signal. At the same time, the life detector will perform detection as a second insurance. If life is detected inside the cat litter box, the relay 7 will be controlled to stop the sterilization and disinfection work of the deodorizing and disinfecting device 2 until the pet cat leaves the cat litter box.

[0051] When a pet cat leaves the litter box through the corridor, the carbon film pressure sensor 62 detects pressure again, ends its current working state, and restarts real-time detection. When no pet cat enters the litter box, the carbon film pressure sensor 62 does not detect pressure. At the same time, the life detector 9 also detects the absence of life and controls the relay 7, thereby controlling the deodorization and disinfection device 2 to start the sterilization and disinfection process until the pet cat leaves the litter box.

[0052] Furthermore, the sand leakage corridor 6 in the litter box body 3 described in the embodiment of the present invention is arranged with holes 61, which can effectively peel off the cat litter between the toes and prevent the pet cat from taking the cat litter out of the litter box; at the same time, the surface of the sand leakage corridor 6 is provided with a carbon film pressure sensor 62 for collecting pressure signals. The carbon film of the carbon film pressure sensor 62 uses microwave plasma magnetron sputtering technology to generate a carbon nanofilm on the substrate through microwave sputtering with microwave plasma as the irradiation electron source and DC magnetron sputtering target material sputtering; the electron density in the vacuum cavity is controlled, the substrate bias is between +0 and 80V, and the ultra-high current density is 100mA / cm 2 , ultra-high electron flux 1.25×10 21 mm -2 ·s -1 ; Ultra-high electron flux induces the growth of a large number of edge-state-rich graphene nanocrystals, forming a high-density graphene nanocrystalline structure film. The average thickness of the carbon film is greater than 10nm, the carbon nanofilm is extremely smooth, and the roughness is less than 2nm; the high-density graphene nanocrystals have rich edge states and active edge electrons. The graphene nanocrystals can serve as a good electron transmission channel, thereby forming a good conductive path.

[0053] The carbon film pressure sensor 62 is used to collect the pressure signal on the surface of the sand leakage corridor 6 in real time, and the life detector 9 is used to detect the life signal of the pet in the litter box body;

[0054] The single chip microcomputer arranged on the circuit board 8 is used to collect the pressure signal on the surface of the sand leakage corridor 6 in real time according to the carbon film pressure sensor 62, and the pet life signal in the litter box body 3 detected by the life detector 9, and generate a corresponding disconnection signal or connection signal. The relay 7 switches the deodorization and disinfection device 2 to turn off or start the deodorization and disinfection mode according to the disconnection signal or the connection signal.

[0055] In some embodiments, the deodorization and disinfection device 2 of the present invention includes an ozone deodorization device, an ultraviolet disinfection device and a ventilation device; the ozone deodorization device, the ultraviolet disinfection device and the ventilation device are respectively detachably arranged on the mounting through hole 10 on the top of the sand basin body 3.

[0056] Furthermore, the ozone deodorization device generates ozone at a concentration of 0.08-0.12 mg / W·min. The metal oxides produced during the ozone disinfection process are non-toxic, odorless, and rapidly dissolve into oxygen, making them less likely to cause secondary pollution. The ozone disinfection system is highly tolerant and sterilizes thoroughly, while also effectively removing mold, fishy, ​​and other odors. It can deodorize the interior of a cat litter box, purifying the air inside while preventing contamination of the surrounding environment.

[0057] The power of the ultraviolet disinfection device is 38-42W when working. The ultraviolet disinfection and sterilization effect is fast and effective, without odor or noise. It can disinfect the inside of the cat litter box to ensure that pet cats have a safe living environment.

[0058] The ventilation device can be understood as a ventilation fan with a working power of 5-10W. The ventilation fan mainly consists of two steering units, which can rotate the fan blades to promote the discharge of air from the cat litter box and inhale fresh air from outside the cat litter box. It can promote air circulation inside the cat litter box, so that the inside of the cat litter box has fresh air and there will be no stuffiness inside the box.

[0059] Specifically, a circle of convex edges 101 is provided at the lower inner portion of the mounting through hole 10, and a circle of concave edges 102 is provided at the outer side of the upper end of the mounting through hole 10; correspondingly, a boss 21 adapted for installation with the convex edge 101 is provided at one end of the deodorizing and disinfecting device 2, and an outer shell cap 1 adapted for installation with the concave edge 102 is provided at the other end of the deodorizing and disinfecting device 2, and the outer shell cap 1 is used to protect the deodorizing and disinfecting device 2; when the convex edge 101 is fully engaged with the boss 21, the deodorizing and disinfecting device 2 can be installed in the mounting through hole 10; when the concave edge 102 is fully engaged with the outer shell cap 1, the deodorizing and disinfecting device 2 will be fully covered by the outer shell cap 1 to play a protective role.

[0060] In the embodiment of the present invention, Figure 5 As shown, the lower end of the sand basin body 3 is provided with a circle of notched latching protrusions 31, and correspondingly, the upper end of the chassis 4 is provided with a circle of raised latching grooves 41, which can ensure directional fixation; through the cooperation of the latching protrusions 31 and the latching grooves 41, the sand basin body 3 is snap-fitted and installed on the chassis 4, and a detachable connection is achieved, and the notches of the latching protrusions 31 and the protrusions of the latching grooves 41 engage with each other to ensure directional fixation. In this embodiment, during the engagement process of the notched latching protrusions 31 and the raised latching grooves 41, the sand basin body 3 gradually covers the chassis 4. After the latching protrusions 31 are snapped onto the latching grooves 41, the upper end opening of the chassis 4 and the lower end opening of the sand basin body 3 are completely closed in a directional manner, completing the assembly.

[0061] In the embodiment of the present invention, the litter box body 3 is a mushroom-shaped litter box body, which has a certain ornamental value. The top of the body has a mushroom-shaped outer edge, which is convenient for the owner to take and put. Correspondingly, the chassis 4 is a cylindrical chassis, and the drawer 5 is a round drawer. A handle portion 121 is provided on the outer side of the round drawer 5, and a slide groove 13 is provided on the lower surface of the drawer 5 to prevent the drawer from being dislocated when being pulled out; at the same time, Figure 4As shown, the overlapping part of the drawer 5 and the sand leakage corridor 6 has a slope structure 15, which can make the cat litter leaking from the sand leakage corridor 6 slide directly back into the drawer 5. The position below the sand leakage corridor 6 is not within the activity range of the pet cat. The slope structure 15 is set here, so that cat litter does not need to be laid at this position, which can effectively save cat litter and reduce the cost of raising pet cats.

[0062] Furthermore, the sand leakage corridor 6 is an annular sand leakage corridor, and the sand leakage corridor 6 includes: a corridor plane portion 12 connected to the entrance door 11, and the holes 61 are arranged on the corridor plane portion 12; one end of the sand leakage corridor 6 is connected to the corridor plane portion 12, and the other end is connected to the corridor connecting column 14 at the top of the sand basin main body 3.

[0063] In the embodiment of the present invention, Figure 6 As shown, the automatic deodorizing and disinfecting smart cat litter box based on the pressure sensor also includes:

[0064] The signal amplifying module 100 connected to the carbon film pressure sensor 62 is used to amplify the pressure signal on the surface of the sand leakage corridor 6 collected by the carbon film pressure sensor 62 in real time;

[0065] The analog-to-digital conversion module 200 connected to the signal amplification module 100 is used to perform analog-to-digital conversion on the pressure signal amplified by the signal amplification module 100 and convert it into a digital pressure signal;

[0066] A single-chip microcomputer 300 connected to the analog-to-digital conversion module 200 and the life detector 9, respectively. In the embodiment of the present invention, the single-chip microcomputer may be an STM32 single-chip microcomputer;

[0067] a first transistor driving module 400 connected to the single-chip microcomputer 300 , a first relay 71 connected to the first transistor driving module 400 , and the first relay 71 connected to a ventilation fan of a ventilation device;

[0068] a second transistor driving module 500 connected to the single chip microcomputer 300, a second relay 72 connected to the second transistor driving module 500, and the second relay 72 connected to the ultraviolet disinfection device;

[0069] A third transistor driving module 600 connected to the single chip microcomputer 300, a third relay 73 connected to the third transistor driving module 600, and the third relay 73 connected to the ozone deodorization device.

[0070] Based on the above embodiments, Figure 6As shown, an embodiment of the present invention further provides a control method for an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor as described in any of the above items, wherein the method comprises the following steps:

[0071] Step S100, controlling the carbon film pressure sensor provided on the surface of the sand leakage corridor to detect in real time whether there is a pressure signal;

[0072] Step S200: When the carbon film pressure sensor detects no pressure signal, the life detector is used to detect whether there is a life signal in the sand basin body. If there is no life signal, the ventilation fan of the ventilation device is controlled to stop working, and the ultraviolet disinfection device and the ozone deodorization device are controlled to start working;

[0073] Step S300: When the carbon film pressure sensor detects a pressure signal, the life detector is used to detect whether there is a life signal in the sand basin body. If there is a life signal, the ventilation fan of the ventilation device is controlled to work, and the ultraviolet disinfection device and the ozone deodorization device are controlled to stop working.

[0074] Furthermore, if Figure 7 As shown, the control method of the automatic deodorization and disinfection intelligent cat litter box based on the pressure sensor of the specific application embodiment of the present invention includes the following steps:

[0075] Step S1, start;

[0076] Step S2: The carbon film pressure sensor detects in real time whether there is a pressure signal;

[0077] Step S3: The life detector detects whether there is life;

[0078] Step S4: The ventilation fan stops working, the ultraviolet disinfection device starts working, and the ozone deodorization device starts working;

[0079] Step S5: The ventilation fan starts working, the ultraviolet disinfection device stops working, and the ozone deodorization device stops working.

[0080] The present invention uses the carbon film pressure sensor 62 provided on the sand leakage corridor 6 to detect in real time whether there is a pressure signal and transmit it back to the single-chip microcomputer 300. At the same time, regardless of whether a pressure signal is detected, the process enters step S3, and the life detector 9 detects whether there is life. Here, the life detector 9 serves as the second detection link, which improves the accuracy of the detection and ensures the life safety of the pet cat.

[0081] If the carbon film pressure sensor 62 does not detect a pressure signal and the life detector 9 detects the presence of life, the process returns to the starting stage to re-detect whether there is a pressure signal; if the carbon film pressure sensor 62 detects a pressure signal and the life detector 9 does not detect the presence of life, the process also returns to the starting stage to re-detect whether there is a pressure signal;

[0082] If the carbon film pressure sensor 62 does not detect a pressure signal, and at the same time, the life detector 9 does not detect the presence of life, the single chip microcomputer 300 controls the first relay 71, the second relay 72 and the third relay 73, thereby controlling the ventilation device to stop working and the ultraviolet disinfection device and the ozone deodorization device to start working; if the carbon film pressure sensor 62 detects a pressure signal, and at the same time, the life detector 9 also detects the presence of life, the single chip microcomputer 300 controls the first relay 71, the second relay 72 and the third relay 73, thereby controlling the ventilation device to start working and the ultraviolet disinfection device and the ozone deodorization device to stop working; in specific implementation, when the ultraviolet disinfection device and the ozone deodorization device stop working for a period of time, for example, 1 minute later, the carbon film pressure sensor 62 that can be set on the sand leakage corridor 6 is turned on in real time. Detect whether there is a pressure signal and transmit it back to the single-chip microcomputer 300. If the carbon film pressure sensor 62 does not detect a pressure signal, it means that no pet cat has passed through the sand leakage corridor 6 to leave the cat litter box, and the ventilation device, ultraviolet disinfection device and ozone deodorization device continue to maintain the current working state; if the carbon film pressure sensor 62 detects a pressure signal, it means that the pet cat is passing through the sand leakage corridor 6 to leave the cat litter box, then wait for a predetermined time, such as 1 minute, and continue to return to the step of executing the carbon film pressure sensor to detect in real time whether there is a pressure signal. The present invention can realize that when a cat enters the cat litter box, the ventilation fan is started, and the ultraviolet disinfection device and ozone deodorization device stop working; if the cat does not enter the cat litter box, the ventilation fan is controlled to stop working, and the ultraviolet disinfection device and ozone deodorization device are automatically started to perform ozone deodorization, ultraviolet disinfection, and ventilation on the environment in the cat litter box.

[0083] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0084] The present application discloses an automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor, which is used in the field of cat litter boxes. The present invention comprises: a chassis, a drawer for assembling cat litter is provided in the chassis, a slide groove is provided on the lower surface of the drawer, and the drawer is pullable relative to the chassis; a litter box body, the litter box body is provided above the chassis, an entrance door is provided on the side of the litter box body, a sand leakage corridor connected to the entrance door is provided in the litter box body, holes are arranged on the sand leakage corridor, a carbon film pressure sensor for collecting pressure signals is provided on the surface of the sand leakage corridor, a life detector for detecting pets is provided in the litter box body, a detachable deodorizing and disinfecting device is provided on the litter box body, and a relay is connected to the deodorizing and disinfecting device; the carbon film pressure sensor and the life detector are respectively connected to a circuit board provided with a single-chip microcomputer, and the circuit board is connected to the deodorizing and disinfecting device through the relay; and a slope structure is provided on the drawer corresponding to the overlapping position of the sand leakage corridor. The litter box intelligently switches between various operating modes with its removable disinfection and deodorization devices, utilizing a carbon film pressure sensor, life detector, and relay. These devices provide ozone deodorization, UV disinfection, and ventilation. Furthermore, the overlapping area between the drawer and the circular corridor for litter collection features a sloped structure, effectively recovering lost litter and increasing the effective depth of the litter, thereby improving litter utilization.

[0085] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor, characterized in that: include: A chassis, wherein a drawer for assembling cat litter is provided in the chassis, a slide groove is provided on the lower surface of the drawer, and the drawer is pullable relative to the chassis; A litter box body, the litter box body being arranged above the chassis, the litter box body being provided with an entrance and exit door on the side thereof, the litter box body being provided with a sand leakage corridor connected to the entrance and exit door, the sand leakage corridor being provided with holes arranged in an array, the surface of the sand leakage corridor being provided with a carbon film pressure sensor for collecting pressure signals, the litter box body being provided with a life detector for detecting a pet, the litter box body being provided with a detachably connected deodorizing and disinfecting device, the deodorizing and disinfecting device being connected to a relay; the carbon film pressure sensor and the life detector being respectively connected to a circuit board provided with a single-chip microcomputer, the circuit board being connected to the deodorizing and disinfecting device via the relay; A slope structure is provided on the drawer at a position corresponding to the overlap of the sand leakage corridor; The carbon film of the carbon film pressure sensor utilizes microwave plasma magnetron sputtering technology to form a carbon nanofilm on a substrate through microwave sputtering using microwave plasma as an irradiation electron source and direct current magnetron sputtering as a target material. The electron density in the vacuum chamber is controlled, with a substrate bias voltage between +0 and 80 V, an ultra-high current density of 100 mA / cm2, and an ultra-high electron flux of 1.25×1021 mm-2·s-1. The ultra-high electron flux induces the growth of a large number of edge-state-rich graphene nanocrystals, forming a high-density graphene nanocrystalline structure film. The average thickness of the carbon film is greater than 10 nm, and the carbon nanofilm is extremely smooth with a roughness of less than 2 nm. The carbon film pressure sensor is used to collect the pressure signal on the surface of the sand leakage corridor in real time, and the life detector is used to detect the life signal of the pet in the litter box body; The single-chip microcomputer provided on the circuit board is used to collect the pressure signal on the surface of the sand leakage corridor in real time according to the carbon film pressure sensor, and the life signal of the pet in the litter box body detected by the life detector, and generate a corresponding disconnection signal or connection signal. The relay switches the deodorization and disinfection device to off or on the deodorization and disinfection mode according to the disconnection signal or the connection signal; When a cat enters the litter box's sand leakage corridor, the carbon film pressure sensor will collect a pressure signal. At the same time, the life detector will perform a second safety check. If life is detected inside the litter box, it will control the relay, thereby stopping the sterilization and disinfection work of the deodorization and disinfection device until the cat leaves the litter box. When the cat leaves the litter box through the corridor, the carbon film pressure sensor will detect the pressure again, end the current working state, and re-perform real-time detection; when no pet cat enters the litter box, the carbon film pressure sensor will not detect the pressure, and the life detector also detects that there is no life, then it will control the relay, and then control the deodorization and disinfection device to start the sterilization and disinfection work until the pet cat leaves the litter box.

2. The automatic deodorizing and disinfecting intelligent cat litter box based on a pressure sensor according to claim 1 is characterized in that: The deodorizing and disinfecting device comprises an ozone deodorizing device, an ultraviolet disinfecting device and a ventilation device; the ozone deodorizing device, the ultraviolet disinfecting device and the ventilation device are respectively detachably arranged on the top of the sand basin body.

3. The automatic deodorizing and disinfecting intelligent cat litter box based on a pressure sensor according to claim 2 is characterized in that: A mounting through hole is provided on the top of the sand basin main body, and the ozone deodorizing device, the ultraviolet disinfecting device and the ventilation device are respectively and detachably arranged on the mounting through hole on the top of the sand basin main body.

4. The automatic deodorizing and disinfecting intelligent cat litter box based on a pressure sensor according to claim 3 is characterized in that: A circle of convex edges is provided at the lower inner portion of the mounting through hole, and a circle of concave edges is provided at the outer side of the upper end of the mounting through hole; correspondingly, a boss adapted to be installed with the convex edge is provided at one end of the deodorizing and disinfecting device, and a shell cover cap adapted to be installed with the concave edge is provided at the other end of the deodorizing and disinfecting device.

5. The automatic deodorizing and disinfecting intelligent cat litter box based on a pressure sensor according to claim 1 is characterized in that: The lower end of the sand basin body is provided with a circle of notched locking protrusions, and correspondingly, the upper end of the chassis is provided with a circle of protruding locking grooves; through the directional cooperation between the locking protrusions and the locking grooves, the sand basin body is directionally engaged and installed on the chassis, and a detachable connection is achieved.

6. The automatic deodorizing and disinfecting intelligent cat litter box based on a pressure sensor according to claim 5 is characterized in that: The sand basin body is a mushroom-shaped sand basin body, and the sand leakage corridor is an annular sand leakage corridor; The sand basin body is a cylindrical sand basin body. Correspondingly, the chassis is a cylindrical chassis, and the drawer is a circular drawer. A handle is provided on the outer side of the circular drawer.

7. The automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor according to claim 1, characterized in that: The sand leakage corridor includes: A corridor plane portion connected to the entrance door, wherein the holes are arranged in an array on the corridor plane portion; One end is connected to the corridor plane portion, and the other end is connected to the corridor connecting column on the top of the sand basin body.

8. The automatic deodorizing and disinfecting smart cat litter box based on a pressure sensor according to claim 2, characterized in that: It also includes: A signal amplification module connected to the carbon film pressure sensor, used to amplify the pressure signal on the surface of the sand leakage corridor collected in real time by the carbon film pressure sensor; an analog-to-digital conversion module connected to the signal amplification module, configured to perform analog-to-digital conversion on the pressure signal amplified by the signal amplification module and convert the result into a digital pressure signal; a single-chip microcomputer connected to the analog-to-digital conversion module and the life detector respectively; a first transistor driving module connected to the single chip microcomputer, a first relay connected to the first transistor driving module, and the first relay connected to the ventilation fan of the ventilation device; A second transistor driving module connected to the single-chip microcomputer, a second relay connected to the second transistor driving module, and the second relay connected to the ultraviolet disinfection device; A third transistor driving module connected to the single chip microcomputer, a third relay connected to the third transistor driving module, and the third relay connected to the ozone deodorization device.

9. A control method for an automatic deodorizing and disinfecting intelligent cat litter box based on a pressure sensor as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Control the carbon film pressure sensor set on the surface of the sand leakage corridor to detect whether there is a pressure signal in real time; When the carbon film pressure sensor detects that there is no pressure signal, the life detector is used to detect whether there is a life signal in the sand basin body. If there is no life signal, the ventilation fan of the ventilation device is controlled to stop working, and the ultraviolet disinfection device and ozone deodorization device are controlled to start working; When the carbon film pressure sensor detects a pressure signal, the life detector is used to detect whether there is a life signal in the sand basin body. When there is a life signal, the ventilation fan of the ventilation device is controlled to work, and the ultraviolet disinfection device and the ozone deodorization device are controlled to stop working.

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