Pet waterer

Abstract

The application discloses a pet water drinking device, which comprises a water tank, a water pump, a tray and a filter. The filter is detachably installed on the tray, and a shell of the filter contains a filtering medium. A cover of the filter is provided with a flange and a water inlet, which are placed on the tray. An annular ridge is arranged on the tray and is in sealing cooperation with the flange. The cover of the filter is further provided with a sedimentation basin for collecting impurities. The device further comprises a detachable water guide pipe, which is locked by a hook on a radial flange and a fluid channel of the water guide pipe is provided with a conical shoulder for sealing cooperation with a water outlet of the water pump. A transparent observation window is arranged on a side wall of the water tank, which comprises a bowl-shaped window body, a sealing ring and a decorative fixing ring, and the structure is stable and the appearance is neat. The application has reasonable structure, good filtering effect and easy maintenance.

Description

[0001] This application claims priority to Chinese patent applications filed on April 2, 2025, with application number 202520633685.7; filed on June 6, 2025, with application number 202521149326.0; filed on January 23, 2026, with application number 202620098904.0; and filed on February 5, 2026, with application number 202620169855.5, the contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure generally relates to pet products, and more specifically, to a pet drinking device with a relatively simple structure that allows for continuous circulation and filtration of water for pets. Background Technology

[0003] Automatic pet water dispensers that use water pumps to circulate water are becoming increasingly popular due to their ability to maintain water freshness. However, existing devices have several drawbacks. The water level in the tank is often difficult to observe, making it hard for users to determine when to refill. The piping connecting the pump and the outlet is often inconvenient to install or remove, complicating cleaning. Furthermore, the filtration system is usually quite simple, with limited filtration effectiveness. Impurities easily clog the filter or flow back into the tank, reducing water quality and circulation efficiency. Additionally, filter installation and replacement are often not user-friendly. Therefore, there is a need for an improved pet water dispenser with a more efficient structure, enhanced filtration, and easier ease of use and maintenance. Summary of the Invention

[0004] The purpose of this disclosure is to provide a pet drinking device and related components that have numerous advantages over the prior art. To provide a basic understanding of this disclosure, a simplified overview of some embodiments is given below. This overview is not a complete summary of this disclosure, nor is it intended to identify key elements of this disclosure or describe its scope. Its sole purpose is to present some embodiments of this disclosure in a simplified form.

[0005] The first embodiment of this application provides a filter for a pet drinking device, comprising: a filter housing having a top opening and at least one outlet; a filter cover disposed at the top opening, the filter cover having a flange for resting on a tray of the pet drinking device and at least one inlet; a filter medium contained within the filter housing; wherein the filter cover further comprises a recessed platform located between the flange and the cover body, the recessed platform being used to collect impurities.

[0006] A second embodiment of this application provides a filter for a pet drinking device, comprising: a filter housing, which is cylindrical or cup-shaped and has a top opening; a central riser, disposed in the center of the interior of the filter housing, extending from a position adjacent to the top opening to the bottom exterior of the filter housing, the lower port of the central riser being used to connect to the outlet of a water pump; a filter cover, disposed in the top opening, the filter cover having an inlet surrounding the central riser; and a filter medium, contained within the filter housing and disposed around the central riser; wherein the outer wall of the filter housing includes an upper wall and a lower wall, the connection between the upper wall and the lower wall forming an annular support, and the filter medium including a first filter medium located above the annular support and a second filter medium located below the annular support.

[0007] The third embodiment of this application provides a filter for a pet drinking device, comprising: a filter housing having a top opening, an annular shoulder located on the outer periphery, and an outlet located below the annular shoulder; a filter cover disposed at the top opening and having an annular flange; and a filter medium contained within the filter housing; wherein the annular flange is used to rest on a first tray of the pet drinking device, the annular shoulder is used to rest on a second tray of the pet drinking device, and the filter cover has an inlet below the annular flange.

[0008] The fourth embodiment of this application provides a filter for a pet drinking device, comprising: a filter housing having a top opening and at least one outlet; a filter cover disposed at the top opening, the filter cover having a flange for resting on a tray of the pet drinking device and at least one inlet; a filter basket detachably disposed on the upper part of the filter housing for containing a first filter medium; and a second filter medium contained within the filter housing and located below the filter basket; wherein the side wall of the filter basket has a first opening at the upper part and a second opening at the lower part, the first opening being for water inlet and the second opening being for water outlet.

[0009] The fifth embodiment of this application provides a pet drinking device, comprising: a water tank for holding water; a tray disposed above the water tank and having a mounting through hole; and a water guide pipe detachably mounted on the tray. The water guide pipe includes: a pipe body having a fluid channel; a radial flange disposed on the outer periphery of the pipe body for passing through the mounting through hole; and at least one hook disposed on the outer peripheral surface of the radial flange, the hook having a horizontal top surface. When the water guide pipe is mounted on the tray, the radial flange passes through the mounting through hole, the horizontal top surface abuts against the lower surface of the tray, and the upper end of the water guide pipe abuts against the upper surface of the tray, thereby locking the water guide pipe to the tray.

[0010] The sixth embodiment of this application provides a water guide pipe for a pet drinking device, comprising: a pipe body having a fluid channel, the fluid channel including a pump interface portion, a flow transition portion, and a nozzle connection portion connected sequentially from bottom to top; a radial flange disposed on the outer periphery of the pipe body for passing through a mounting through hole on the tray of the pet drinking device; at least one hook portion disposed on the outer peripheral surface of the radial flange, the hook portion having a horizontal top surface and a guide slope inclined downward and inward from the horizontal top surface; wherein, an inner conical shoulder is formed between the pump interface portion and the flow transition portion for sealingly engaging with an outer conical shoulder on the outlet of a water pump.

[0011] The seventh embodiment of this application provides an observation window for a pet drinking device, comprising: a window body, which is bowl-shaped and has an observation portion for passing through an installation port on the side wall of a water tank, and a plurality of studs arranged around the observation portion; a sealing ring for being disposed between the window body and the side wall of the water tank; a fastener for passing through the installation port and engaging with the studs to fix the window body to the side wall of the water tank; and a decorative fixing ring for being installed from the outside of the water tank, fitted around the outer periphery of the observation portion, and covering the fastener.

[0012] The eighth embodiment of this application provides a pet drinking device, comprising: a water tank for holding water, wherein an installation opening is provided on the side wall of the water tank; a window body, which is bowl-shaped and installed from the inside of the water tank outward, having an observation part passing through the installation opening, a plurality of studs arranged around the observation part, and a buckle provided on the side wall of the observation part; a sealing ring disposed between the window body and the side wall of the water tank; a fastener, which passes through the installation opening and cooperates with the studs to fix the window body to the side wall of the water tank; and a decorative fixing ring, which is installed from the outside of the water tank and sleeved on the outer periphery of the observation part, wherein the decorative fixing ring includes a claw, and the claw has a groove that cooperates with the buckle.

[0013] The ninth embodiment of this application provides a pet drinking device, comprising: a water tank for holding water; a first tray disposed above the water tank and having a first through hole; a second tray disposed above the first tray and having a second through hole; and a filter installed sequentially through the second through hole and the first through hole. The filter comprises: a filter housing having a top opening and at least one outlet; a filter cover disposed at the top opening and having an annular flange; and a filter medium contained within the filter housing. The annular flange rests on the second tray, the outer periphery of the filter housing has an annular shoulder resting on the first tray, and the filter cover has an inlet below the annular flange.

[0014] The tenth embodiment of this application provides a pet drinking device, including: a water tank for holding water; a tray disposed above the water tank, the tray having a vertically penetrating mounting opening; and a filter disposed at the mounting opening, the filter including a filter housing, a filter cover, and a filter medium contained within the filter housing; wherein the filter is detachably mounted on the tray in a vertical direction, the filter cover has a resting portion for resting on the upper surface of the tray, and the filter housing extends downward through the mounting opening into the water tank; the filter is configured such that installation can be completed by inserting it vertically downward from above the tray into the mounting opening, and it can be completely removed from the mounting opening by lifting it vertically upward from above the tray, and the installation and removal of the filter are both performed from outside the pet drinking device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective top view of the pet drinking device according to the first embodiment.

[0017] Figure 2 yes Figure 1 An exploded 3D view of a pet drinking fountain.

[0018] Figure 3 It is along Figure 1 A cross-sectional view of the pet drinking fountain along line AA.

[0019] Figure 4 yes Figure 1 An exploded perspective view of the filter in a pet drinking water device.

[0020] Figure 5 yes Figure 4 A bottom-view perspective view of the filter housing of the medium filter.

[0021] Figure 6 yes Figure 5 Top view of the filter housing.

[0022] Figure 7 It is along Figure 6 A cross-sectional view of the filter housing along the BB line.

[0023] Figure 8 This is a perspective top view of the pet drinking device according to the second embodiment.

[0024] Figure 9 yes Figure 8 An exploded 3D view of a pet drinking fountain.

[0025] Figure 10 yes Figure 8 A top view of a pet drinking fountain.

[0026] Figure 11 It is along Figure 10 A cross-sectional view along the CC line of a pet drinking fountain.

[0027] Figure 12 yes Figure 8 An exploded perspective view of the filter in a pet drinking water device.

[0028] Figure 13 This is a perspective top view of the pet drinking device according to the third embodiment.

[0029] Figure 14 It is along Figure 13 A cross-sectional view of the central axis of the nozzle of a pet drinking device.

[0030] Figure 15 yes Figure 13 An exploded 3D view of a pet drinking fountain.

[0031] Figure 16 yes Figure 13 An exploded perspective view of the observation window of the water tank in a pet drinking fountain.

[0032] Figure 17A yes Figure 16 A front-view perspective of the main body of the window in the observation window.

[0033] Figure 17B yes Figure 17A Rear-view perspective of the main window.

[0034] Figure 18 yes Figure 16 Rear-view perspective of the decorative retaining ring of the central observation window.

[0035] Figure 19 yes Figure 16 The main view of the medium-sized water tank with the observation window removed.

[0036] Figure 20 yes Figure 13 An exploded 3D view of the water pump in a pet drinking fountain.

[0037] Figure 21A yes Figure 13 A cross-sectional view of the water pipe of a pet drinking device along its central axis.

[0038] Figure 21B yes Figure 21A A 3D view of the central water pipe.

[0039] Figure 22 yes Figure 13 An exploded perspective view of the filter in a pet drinking water device.

[0040] Figure 23 yes Figure 22 A cross-sectional view of the filter with the filter media removed.

[0041] Figure 24 This is a perspective top view of the pet drinking device according to the fourth embodiment.

[0042] Figure 25 yes Figure 24 An exploded 3D view of a pet drinking fountain. Detailed Implementation

[0043] In the following description, different embodiments of this disclosure will be described. Specific structures and details are set forth for purposes of explanation to provide a thorough understanding of the embodiments. However, this disclosure can be practiced by those skilled in the art without these specific details. Furthermore, well-known features will be omitted or simplified for clarity of the described embodiments.

[0044] Figures 1 to 7 The illustration shows a pet drinking device 10 according to a first embodiment of the present disclosure. (Reference) Figure 1-3 The pet drinking device 10 includes a water tank 12, a water pump 20, a first tray 14, a second tray 16, a nozzle 18, and a filter 22.

[0045] The water tank 12 has a closed bottom and an open top for holding water. A transparent observation window 24 can be provided on the side wall of the water tank 12 to observe the water level. A positioning block 26 can be formed in the bottom of the interior of the water tank 12 to define a positioning groove 28. The water pump 20 is detachably mounted and fixed in the positioning groove 28, for example by suction cups provided at its bottom.

[0046] The water pump 20 is located inside the water tank 12. It has an inlet 32 ​​on its side or bottom and an outlet pipe 34 on its top. Water in the water tank 12 enters the water pump 20 through the inlet 32 ​​and is discharged from the outlet pipe 34.

[0047] The first tray 14 is detachably fitted onto the upper end of the water tank 12. A resting flange 36 is formed on the side wall of the first tray 14, which rests on the upper edge of the water tank 12. The first tray 14 is generally concave, with a downwardly recessed groove 38 formed in its central portion. A through hole 40 communicating with the interior of the water tank 12 is provided at the center of the bottom of the groove 38.

[0048] The filter 22 is inserted and installed axially through the through-hole 40 and positioned to protrude from the bottom of the recess 38 into the water tank 12. Further reference. Figure 4-7 The filter 22 includes a filter housing 42, a filter cover 44, and a filter medium 46.

[0049] The outer wall of the filter housing 42 is cylindrical or cup-shaped. A circumferentially extending annular flange 48 is formed at its top opening. When the filter 22 is inserted through the through hole 40, the annular flange 48 rests on the bottom of the groove 38, thereby supporting and holding the filter 22 on the first tray 14. An annular ridge 49 (e.g., around the through hole 40 and the annular flange 48) may be formed at the bottom of the groove 38. Figure 2 and Figure 3 (As shown). The annular ridge 49 and the annular flange 48 engage tightly to form a basic sealing fit.

[0050] A central riser 50 is formed in the center of the interior of the filter housing 42. The central riser 50 extends from a position adjacent to the top opening of the filter housing 42 toward the bottom of the housing and passes through the bottom of the filter housing 42 to the outside. The lower port of the central riser 50 is connected to the outlet pipe 34 of the water pump 20.

[0051] The filter medium 46 is housed inside the filter housing 42 and surrounds the central riser 50. A filter cover 44 is provided on the top opening of the filter housing 42, thereby substantially sealing the filter medium 46.

[0052] A connecting pipe 52 is formed at the center of the filter cover 44. The lower port of the connecting pipe 52 is connected to the upper port of the central riser 50. The filter cover 44 is provided with at least one inlet 54 surrounding the connecting pipe 52. Water enters the filter 22 through this inlet 54. The outer wall of the filter housing 42 defines at least one outlet 56. Water entering the filter 22 through the inlet 54 passes through the filter medium 46 and flows out of the filter 22 from the outlet 56 into the water tank 12. Therefore, the water flowing out from the outlet 56 is filtered.

[0053] Continue to refer to Figure 2 and Figure 3 The second tray 16 is detachably mounted above the first tray 14. The second tray 16 forms an engaging flange 58 that engages with the upper edge of the first tray 14. The second tray 16 is generally concave, with a downwardly extending water guide pipe 60 at its center. The upper port of the water guide pipe 60 may be formed in a generally umbrella shape on the upper surface of the second tray 16. Its lower port connects to the upper port of the connecting pipe 52. At least one return hole 62 is provided on the surface of the second tray 16, allowing water on the second tray 16 to flow through the return hole 62 to the first tray 14, and then return to the water tank 12 through the filter 22.

[0054] Nozzle 18 is detachably mounted above the second tray 16. Nozzle 18 includes a downwardly extending riser pipe 64. The lower port of the riser pipe 64 is inserted into the upper port of the water guide pipe 60. Nozzle 18 is provided with a plurality of guide grooves 66 surrounding the upper port of the riser pipe 64. The riser pipe 64 further conveys water discharged from the water guide pipe 60 upward, and then the water flows out through the guide grooves 66 and falls back into the second tray 16. Nozzle 18 may also include a baffle cap 68 provided on the upper port of the riser pipe 64. The baffle cap 68 cooperates with the upper port of the riser pipe 64 to form a plurality of nozzles 70 corresponding to the guide grooves 66. Water conveyed upward by the riser pipe 64 is blocked by the baffle cap 68 and then flows from the nozzles 70 into the guide grooves 66.

[0055] The water circulation process of the pet drinking device 10 is as follows: The water pump 20 pumps water from the water tank 12 upwards, flowing sequentially through the central riser 50, connecting pipe 52, guide pipe 60, and riser pipe 64, and then falling along the guide channel 66 into the second tray 16 for the pet to drink from. When the water level in the second tray 16 rises above the return hole 62, the water flows from the return hole 62 to the first tray 14. Some impurities carried in the water settle in the groove 38 under gravity, while other impurities, along with the water, cross the annular ridge 49 and enter the filter 22 from the inlet 54. The water filtered by the filter 22 flows out from the outlet 56 back into the water tank 12 and re-enters the water pump 20, thus achieving water circulation. Impurities in the water are basically retained in the first tray 14 and the filter 22. The function of the annular ridge 49 is to prevent impurities settled on the first tray 14 from entering the water tank 12 through the through hole 40 when the filter 22 needs to be lifted.

[0056] The first tray 14 may be provided with at least one overflow hole 72 communicating with the interior of the water tank 12. The height of the overflow hole 72 is at least higher than the inlet 54 of the filter 22. Water returning to the first tray 14 preferentially enters the filter 22 through the inlet 54. When the filter 22 is clogged with impurities, causing the water level in the first tray 14 to rise above the overflow hole 72, the water will flow directly back to the water tank 12 from the overflow hole 72.

[0057] In some embodiments, the pet drinking device 10 may not include the connecting pipe 52. For example, a through hole may be formed in the center of the filter cover 44, through which the central riser 50 is directly connected to the water pipe 60.

[0058] In some embodiments, the pet drinking device 10 may not include the water pipe 60. For example, a through hole may be formed in the center of the second tray 16, through which the riser pipe 64 passes directly to the central riser pipe 50.

[0059] In some embodiments, the first tray 14 may not have the groove 38, and impurities may be deposited directly on the surface of the first tray 14.

[0060] In some embodiments, the pet drinking device 10 may not include a nozzle 18. Water delivered upwards can flow directly from the water conduit 60 into the second tray 16 for the pet to drink from.

[0061] In some embodiments, the pet drinking device 10 may not include the second tray 16. The upward-flowing water can flow directly into the first tray 14 for the pet to drink from.

[0062] There are no particular restrictions on the shape, size, and fixing method of the first tray 14 and the second tray 16.

[0063] See also Figure 3 and Figure 4 The filter medium 46 may include four types of filter media: a first filter medium 74, a second filter medium 76, a third filter medium 78, and a fourth filter medium 80. The first filter medium 74 is a pre-filter / coarse filter medium forming the first stage of filtration. The second filter medium 76, the third filter medium 78, and the fourth filter medium 80 are the main filter or fine filter media forming the second stage of filtration.

[0064] The first filter medium 74 is located at the top of the filter 22 and is used to filter larger impurities, such as hair, large sand particles, etc., and may be, for example, a coarse-pore sponge with a large pore size. The first filter medium 74 may be formed as a hollow cylinder, which is fitted around the central riser 50 and the connecting pipe 52 (if present) and covers the inlet 54 to ensure that all water entering from the inlet 54 must pass through it.

[0065] The second filter medium 76 is located below the first filter medium 74 and is used to adsorb impurities, remove odors or pigments, etc. It can be, for example, a carbon rod made of activated carbon, formed into a hollow cylinder and fitted around the central riser 50.

[0066] A filling space may exist between the inner surface of the second filter medium 76 and the outer surface of the central riser 50, and the third filter medium 78 fills this space. The third filter medium 78 is used to reduce water hardness or remove residual chlorine, and may be a granular material, such as resin filter media, mineral filter media, calcium sulfite, etc.

[0067] The fourth filter medium 80 is located at the bottom of the filter 22 and adjacent to the bottom of the second filter medium 76. It is used to filter smaller impurities, such as fine sand, clay particles, or suspended particles, and can be, for example, a fine-pore sponge with relatively small pore size. The fourth filter medium 80 can be formed as a hollow cylinder, fitted around the central riser 50, with no gap between it and the central riser 50, thereby sealing the bottom of the second filter medium 76 and surrounding the third filter medium 78.

[0068] It is understood that the filter media 46 may include fewer or more than four types and may form more than two stages of filtration.

[0069] Understandably, the arrangement or shape of the filter media at each stage can be adjusted as needed, but it usually follows a sequence from coarse filtration to fine or special filtration, because performing coarse filtration first can extend the service life of subsequent filter media. For example, the positions of the second filter media 76 and the fourth filter media 80 can be interchanged, and their shapes can be adjusted accordingly.

[0070] The filter 22 can be reusable or disposable. When reusable, the filter cover 44 is detachably fixed to the filter housing 42; when disposable, the two can be permanently fixed by means of ultrasonic welding or adhesive bonding.

[0071] Continue to refer to Figure 3-7 The outer wall of the filter housing 42 includes an upper wall 82 adjacent to the filter cover 44, a lower wall 84 adjacent to the bottom of the housing, and a bottom wall 86. An annular support 88 can be formed at the connection between the upper wall 82 and the lower wall 84, located inside the filter housing 42. This annular support 88 divides the filter 22 into a first-stage filtration above it and a second-stage filtration below it. The first filter medium 74, serving as the first-stage filtration, is supported by the annular support 88. The annular support 88 can extend horizontally inward from the outer wall, or extend inward and downward at an angle.

[0072] The outlet 56 may include a first outlet 90 located on the upper wall 82, a second outlet 92 located on the lower wall 84, and a third outlet 94 located on the bottom wall 86.

[0073] The first outlet 90 is configured such that its lowest point is higher than the highest point of the annular support 88. Therefore, a portion 96 of the upper wall 82 located below the first outlet 90 connects to the annular support 88 to form a water guiding member 98. Furthermore, the first filter medium 74 is configured such that a gap 100 exists between its outer peripheral wall and the upper wall 82.

[0074] The filtration process of filter 22 is as follows: Water enters filter 22 through inlet 54, is filtered by the first filter medium 74, and then flows out along the outer, inner, and bottom walls of the first filter medium 74. Water flowing along the inner and bottom walls directly enters the second-stage filtration below the annular support 88; water flowing along the outer wall falls into the water guide member 98 and is guided into the second-stage filtration. This prevents water filtered in the first stage from flowing directly out of the first outlet 90. When the second-stage filter medium becomes clogged, causing the water level inside filter 22 to rise above the first outlet 90, the water will flow back to the water tank 12 from the first outlet 90. Since the possibility of clogging in the first-stage filter is relatively low, this design ensures that water undergoes two stages of filtration during initial operation and at least one stage of filtration during long-term operation. It should be noted that to ensure all water undergoes two stages of filtration during initial operation, the water level in the water tank 12 should not exceed the first outlet 90.

[0075] The second outlet 92 and the third outlet 94 can serve as outlets for the second stage of filtration, or they can keep the water in the water tank 12 in continuous contact with the second filter medium 76 or the fourth filter medium 80, thereby continuously adsorbing and purifying the water in the water tank.

[0076] In some embodiments, the first outlet 90 can be omitted to ensure that the water undergoes two stages of filtration in all cases. However, in this configuration, if the filter becomes completely clogged, water may flow directly back to the water tank 12 unfiltered through the overflow hole 72.

[0077] In some embodiments, one of the second outlet 92 and the third outlet 94 may be omitted, so that water flows back to the water tank 12 through only one of these outlets after the second stage of filtration.

[0078] The pet drinking device 10 provided in this embodiment has many advantages over the prior art: water circulation turns "stagnant water" into "living water"; the first tray 14 can settle some impurities; it can perform multi-stage filtration of water; and it can maintain coarse filtration even when fine filtration fails.

[0079] Figures 8 to 12 The illustration shows a pet drinking device 200 according to a second embodiment of the present disclosure. (Reference) Figure 8-11 The pet drinking device 200 includes a base 202, a water tank 204, a first tray 206, a second tray 208, a nozzle 210, a water pump assembly 212, and a filter 214.

[0080] The water tank 204 is placed on the base 202, and the two are detachable. The upper surface of the base 202 may have a mounting groove 216, and the bottom of the water tank 204 has a downwardly extending support member 218. When the water tank 204 is placed on the base 202, the support member 218 is supported within the mounting groove 216 to prevent lateral movement. Preferably, the lowermost end of the support member 218 is the lowermost end of the water tank 204, so that the water tank 204 remains stable even when placed alone.

[0081] Water tank 204 is used to hold water. Its bottom has a rotor housing for water pump assembly 212, including a circular opening 222 formed in the bottom of water tank 204, and a tubular body portion 224 extending axially downward from the circular opening 222 and protruding out of the water tank 204. The tubular body portion 224 defines an internal space for accommodating the rotor 226 of water pump assembly 212. Preferably, the lowermost end of the tubular body portion 224 is flush with or slightly higher than the lowermost end of the support member 218 to increase placement stability. The rotor housing is generally integrally formed with the bottom of water tank 204 and is closed except for the circular opening 222 to prevent water leakage.

[0082] The base 202 has a drive housing 228 for the water pump assembly 212 at a position corresponding to the rotor housing. It defines a space for housing the tubular main body 224. The device for driving the rotor 226 to rotate (e.g., an electromagnetic coil, not shown) is located inside the base 202 and surrounds the drive housing 228. A circuit board (not shown) and a power cord 230 are also located inside the base.

[0083] The impeller housing of the pump assembly 212 is located above the rotor housing. The impeller 234, connected to the rotor 226, rotates within the impeller housing along its central axis. A circular inlet 236 is located at the top of the impeller housing, extending along the central axis of the impeller 234. Water enters through the inlet 236 and is centrifugally accelerated as the impeller 234 rotates. The relatively small diameter of the inlet 236 (e.g., 2-4 mm) helps reduce noise and pump load. An outlet pipe 238 is located at the top of the impeller housing, extending tangentially to the direction of rotation of the impeller 234. The accelerated water exits through the outlet pipe 238. A baffle 240 may be positioned directly above the inlet 236. Its height is set to not obstruct water entry while preventing vortices from forming above the inlet during impeller rotation. The vertical distance between the baffle 240 and the inlet 236 is preferably 3-8 mm, more preferably 4-5 mm.

[0084] The first tray 206 is detachably fitted onto the upper end of the water tank 204. A first resting flange 242 is formed on its side wall, resting on the upper edge of the water tank 204. The first tray 206 is generally concave, with a downwardly recessed groove 244 in its central portion. A first through hole 246 communicating with the water tank 204 is provided at the bottom center of the groove 244. The first tray 206 has a downwardly extending water guide pipe 248 at a position corresponding to the water outlet pipe 238. When the first tray 206 is placed on the water tank 204 and aligned with the water outlet pipe 238, the lower end of the water guide pipe 248 connects to the water outlet pipe 238, and its upper end is formed on a protrusion 250 on the upper surface of the first tray 206.

[0085] The second tray 208 is detachably mounted above the first tray 206. It includes a second resting flange 254 with a positioning notch 252. This resting flange 254 rests on the first resting flange 242. The shape of the positioning notch 252 corresponds to the protrusion 250, exposing the upper surface of the protrusion 250, while covering the remainder of the first tray 206 with the second tray 208. The second tray 208 is generally concave. At least one reflux hole 256 is provided on the surface of the second tray 208, allowing water on the second tray 208 to flow back to the first tray 206. The bottom of the second tray 208 has a second through hole 258 at a position corresponding to the first through hole 246.

[0086] Nozzle 210 is detachably inserted into the upper port of water guide tube 248, substantially above the second tray 208. Nozzle 210 includes a riser section 211 and a head 213. The riser section 211 is an elongated straight tube with an outer diameter smaller than the inner diameter of the upper port of water guide tube 248 for easy insertion. The head 213 is a pot-shaped structure formed by the outer wall, with a guide outlet 215 at the nozzle orifice. Nozzle 210 further conveys water discharged from water guide tube 248 upwards, and then the water flows out through the guide outlet 215 and falls back into the second tray 208.

[0087] The filter 214 is inserted and installed axially through the second through-hole 258 and the first through-hole 246, and positioned to protrude from the bottom of the second tray 208 into the water tank 204. Further reference. Figure 12 The filter 214 includes a filter housing 260, a filter cover 262, and a filter medium 264.

[0088] The filter housing 260 is cylindrical or cup-shaped. A circumferentially extending annular flange 266 is formed at its top opening. When the filter 214 is inserted through the second through-hole 258, the annular flange 266 rests on the bottom of the second tray 208, thereby supporting the filter 214 on the second tray 208. An annular ridge 268 is formed around the second through-hole 258 at the bottom of the second tray 208. This annular ridge 268 tightly engages with the annular groove 270 at the bottom of the annular flange 266 to form a substantially sealed fit.

[0089] The filter medium 264 is housed within the filter housing 260. A filter cover 262 is disposed on the top opening of the filter housing 260, substantially sealing the filter medium 264.

[0090] The outer wall of the filter housing 260 may have a radially annular shoulder 272 formed on its outer periphery. When the filter 214 is further inserted through the first through-hole 246, the annular shoulder 272 rests on the bottom of the groove 244 of the first tray 206, thereby further supporting the filter 214 on the first tray 206. An annular ridge 274 is formed at the bottom of the groove 244, surrounding the first through-hole 246 and the annular shoulder 272. The annular ridge 274 engages tightly with the outer wall of the filter housing 260 to form a substantially sealed fit.

[0091] At least one inlet 276 is provided on the filter housing 260, located above the annular shoulder 272. Water enters the filter 214 through the inlet 276. When the filter 214 is supported in place, the inlet 276 is located above the annular ridge 274 or the first through hole 246. At least one outlet 278 is also provided on the filter housing 260, located below the annular shoulder 272. Water entering the filter 214 through the inlet 276 passes through the filter medium 264 and flows out from the outlet 278 into the water tank 204. Therefore, the water flowing out from the outlet 278 is filtered. When the filter 214 is supported in place, the outlet 278 is located below the annular ridge 274 or the first through hole 246.

[0092] The water circulation process of the pet drinking device 200 is as follows: The water pump assembly 212 pumps water from the water tank 204 upwards, flowing sequentially through the outlet pipe 238, the guide pipe 248, and the nozzle 210, and then falling into the second tray 208 along the guide outlet 215 for the pet to drink from. When the water level in the second tray 208 rises above the return hole 256, water flows from the return hole 256 back to the first tray 206. Some impurities in the water settle in the groove 244, while other impurities, along with the water, cross the annular ridge 274 and enter the filter 214 from the inlet 276. The water filtered by the filter 214 flows out from the outlet 278 back into the water tank 204 and re-enters the water pump assembly 212, thus achieving water circulation. Impurities are retained in the first tray 206 and the filter 214.

[0093] When filter 214 needs to be replaced or inspected, the user can lift it by grasping the annular flange 266. The outer surface of the annular flange 266 may be provided with anti-slip texture to increase friction. The annular ridge 274 also serves to prevent impurities in the groove 244 from flowing into the water tank 204 when the filter is lifted.

[0094] In some embodiments, the pet drinking device 200 may not have a water pipe 248. For example, a through hole may be provided at a corresponding location to allow the water pipe 238 to pass directly through and connect to the nozzle 210.

[0095] In some embodiments, the first tray 206 may not have the groove 244, and impurities may be deposited directly on the first tray 206.

[0096] In some embodiments, the pet drinking device 200 may not have a nozzle 210, and the upward-flowing water may flow directly into the second tray 208 from the water guide pipe 248 or the water outlet pipe 238.

[0097] In some embodiments, the pet drinking device 200 may be without the second tray 208. The filter 214 is supported only by the first tray 206, and the upward-flowing water flows directly into the first tray 206 for the pet to drink from.

[0098] There are no particular restrictions on the shape, size, and fixing method of the first tray 206 and the second tray 208.

[0099] See also Figure 11 and Figure 12 The filter medium 264 may include a first filter medium 280, a second filter medium 282, and a third filter medium 284. The first filter medium 280 is a pre-filtration / coarse filtration medium forming the first stage of filtration. The second filter medium 282 and the third filter medium 284 are the main filtration or fine filtration media forming the second stage of filtration. Water entering from inlet 276 must first pass through the first stage of filtration before reaching the second stage of filtration.

[0100] The first filter medium 280 is located in the upper part of the filter 214, for example, above the annular shoulder 272. It is used to filter larger impurities, such as hair, large sand particles, etc., or simultaneously to reduce hardness and remove residual chlorine. It can be a granular material, such as resin filter media, mineral filter media, calcium sulfite, etc.

[0101] The second filter medium 282 is located below the first filter medium 280, for example, below the annular shoulder 272. It is used to adsorb impurities, remove odors or pigments, etc., and can be, for example, an activated carbon rod formed as a hollow cylinder.

[0102] The third filter medium 284 is located at the bottom of the filter 214 and adjacent to the bottom of the second filter medium 282. It is used to filter smaller impurities, such as fine sand, clay particles, etc., and can be, for example, a fine-pore sponge formed into a cylinder to close the bottom of the second filter medium 282.

[0103] It is understood that the filter medium 264 may include fewer or more than three types (for example, particulate filter medium may be filled inside the second filter medium 282 as a fourth filter medium), and may form more than two stages of filtration.

[0104] Understandably, the arrangement or shape of the filter media at each stage can be adjusted, but it generally follows a sequence from coarse to fine to extend the filter's lifespan. For example, the positions of the second filter media 282 and the third filter media 284 can be interchanged, and their shapes can be adjusted accordingly.

[0105] The filter 214 can be reusable or disposable, and its cover 262 is connected to the housing 260 in a manner similar to that in the first embodiment.

[0106] The outer wall of the filter housing 260 includes an upper sidewall 286 above the annular shoulder 272, a lower sidewall 288 below it, and a bottom wall 290. An annular support 292 can be formed at the connection between the upper sidewall 286 and the lower sidewall 288 within the housing. The filter basket 294 containing the first filter medium 280 is supported by this annular support 292.

[0107] The first filter medium 280 can be loaded into or removed from the filter basket 294 through its top opening. An annular step 296 is radially formed on the sidewall of the filter basket 294. Through this step 296, the filter basket 294 engages with the annular support 292 of the filter housing 260, thereby being held and supported on the upper part of the filter 214. The engagement between the annular step 296 and the annular support 292, and / or the abutment between the upper sidewall 286 and the sidewall of the filter basket 294, provides a substantial seal, preventing water from flowing directly to the lower part of the filter through this point.

[0108] At least one first opening 298 is provided on the side wall of the filter basket 294, which is located above the annular step 296. Water enters the filter basket 294 through the first opening 298. At least one second opening 300 is also provided on the filter basket 294, which is located below the annular step 296 (e.g., on the bottom wall 290). Water entering the filter basket 294 through the first opening 298 passes through the first filter medium 280 and then flows out of the filter basket 294 through the second opening 300. Therefore, the water flowing out of the second opening 300 has been filtered by the first filter medium 280. The first opening 298 and the second opening 300 allow water to pass through but prevent particles of a certain size (such as the filter medium) from passing through, thereby retaining the filter medium within the filter basket 294.

[0109] Inlet 276 is located on the upper sidewall 286. Outlet 278 may include a first outlet 302 located on the lower sidewall 288 and a second outlet 304 located on the bottom wall 290. Water that has passed through the first stage of filtration can be filtered by the second filter medium 282 and then enter the water tank 204 through the first outlet 302, or it can be filtered by the third filter medium 284 and then enter the water tank 204 through the second outlet 304. The first outlet 302 and the second outlet 304 can serve as outlets for the second stage of filtration, or they can keep the water in the water tank 204 in continuous contact with the second stage filter medium for adsorption and purification.

[0110] In some embodiments, one of the first outlet 302 or the second outlet 304 may be omitted, so that water flows back to the water tank through only one of these outlets after the second stage of filtration.

[0111] The advantages of the pet drinking device 200 provided in this embodiment include: water circulation to maintain water quality; the first tray 206 can settle impurities; multi-stage filtration is possible; and the filter 214 is easy to replace.

[0112] Figures 13 to 23 The illustration shows a pet drinking device 400 according to a third embodiment of this disclosure. (Reference) Figure 13-15 The pet drinking device 400 includes a water tank 402, a water pump 404, a tray 406, a water pipe 408, a nozzle 410, and a filter 412.

[0113] Water tank 402 has a closed bottom and an open top for holding water. At least one side wall of water tank 402 is provided with a transparent observation window 414 for observing the water level. Figure 16-19 As shown, the side wall of the water tank 402 is provided with a window mounting opening 504. The transparent observation window 414 includes a window body 506, a sealing ring 508, and a decorative fixing ring 510 arranged sequentially from the inside to the outside.

[0114] The window body 506 is a one-piece injection-molded transparent bowl-shaped structure. The outline of its bowl-shaped opening is a rounded rectangle. The center of the inner bottom wall of this body protrudes outwards from the water tank 402, forming a shape resembling... Figure 17A The observation section 512 is shown. Correspondingly, its outer bottom wall forms a recessed region 514 corresponding to the outline of the observation section 512, as shown. Figure 17B As shown. Around the observation section 512, multiple studs 516 and multiple positioning posts 518 are provided on the inner bottom wall of the main body. The studs 516 are connected to the observation section 512 via reinforcing ribs 517. An annular sealing groove 520 is provided on the end face of the bowl-shaped opening of the window body 506. A sealing ring 508 is embedded in the sealing groove 520. Multiple latches 521 are provided on the side wall of the observation section 512. The studs 516, positioning posts 518, and latches 521 are generally arranged symmetrically around the observation section 512.

[0115] The decorative retaining ring 510 is a ring-shaped plate component. The shape and size of its inner hole 526 correspond to the observation part 512. Its outer contour dimensions correspond to the contour of the bowl-shaped opening of the window body 506. The decorative retaining ring 510 has multiple positioning holes 528 and multiple claws 530 on its surface facing the window body 506. The inner side of the claws 530 has a groove 532.

[0116] The shape of the mounting opening 504 corresponds to the contour defined by the observation section 512, stud 516, positioning post 518, and locating claw 530. Specifically, it includes a central hole 522 through which the observation section 512 passes, and a plurality of clearance slots 524 extending outward from the edge of the central hole 522. The position and shape of these clearance slots 524 correspond one-to-one with the locating claw 530, stud 516, and positioning post 518. The design of the clearance slots 524 communicating with the central hole 522 allows for simultaneous clearance of the reinforcing rib 517 connected to the stud 516.

[0117] During installation, first, place the sealing ring 508 into the sealing groove 520. Then, align the window body 506 with the mounting opening 504 from inside the water tank 402, so that the observation part 512 passes through the central hole 522 and protrudes to the outside of the housing, while aligning each stud 516 and positioning post 518 with its respective clearance slot 524. At this time, the sealing ring 508 is pressed between the window body 506 and the inner wall of the water tank 402. Next, from the outside of the housing, screw the fastening screws (not shown in the figure) through the corresponding clearance slots 524 and into the corresponding studs 516, thereby firmly fixing the window body 506. Finally, from the outside of the housing, align and install the decorative retaining ring 510 so that its inner hole 526 fits onto the protruding observation part 512. At the same time, the positioning hole 528 on the decorative retaining ring 510 engages with the positioning post 518 on the window body 506. When correctly assembled, the claws 530 on the decorative retaining ring 510 at least partially pass through the corresponding clearance slots 524 and are located inside the mounting opening 504. The latches 521 on the side wall of the viewing section 512 engage with the slots 532 on the claws 530 in a snap-fit ​​manner, thereby securing the decorative retaining ring 510 and covering internal structures such as screws, resulting in a neat and aesthetically pleasing appearance.

[0118] The water pump 404 is detachably mounted and secured inside the water tank 402, for example, by suction cups at the bottom. The water pump 404 has an inlet 416 on its side or bottom and an outlet pipe 418 at its top. A filter sleeve 420 surrounds the inlet 416. Filter cotton 422 is placed inside the filter sleeve 420, upstream of the inlet 416, for pre-filtering the water entering the water pump 404.

[0119] The tray 406 is detachably fitted onto the upper opening of the water tank 402. An annular step 424 is formed on the inner wall of the water tank 402 below the upper edge of the opening. The tray 406 has a resting flange 426 that substantially matches the shape of the annular step 424. This resting flange 426 rests on the annular step 424, thereby positioning the entire tray 406 below the plane of the tank opening. The resting flange 426 forms a U-shaped clearance notch 427. This notch, together with the periphery of the upper opening of the water tank 402, forms a power cable channel from which the power cable (not shown) of the water pump 404 can be led out. The tray 406 is generally concave, with an upwardly projecting umbrella-shaped boss 428 formed in its central portion. A through hole 430 communicating with the interior of the water tank 402 is provided at the center of the flat top of the boss 428. In the illustrated embodiment, the edge of the through hole 430 is rectangular with a semi-circular end.

[0120] A water guide tube 408 is detachably mounted at the through-hole 430 of the tray 406. Its upper port connects to the nozzle 410, and its lower port connects to the water pump 404. The water guide tube 408 can be a flexible hose, such as a one-piece molded silicone component. Figure 21A and21B As shown, the water guide pipe 408 includes a circular top plate 432 at the top of the pipe body, which has a central hole 434 serving as the upper port. A pipe wall 436 extends downward from the periphery of the central hole 434. The inner circumferential surface of the pipe wall 436 defines a fluid passage 438.

[0121] The fluid channel 438 comprises, from top to bottom, interconnected segments 440, 442, 444, 446, and 448. The upper end of the first segment 440, i.e., the central hole 434, typically has a uniform inner diameter. The second segment 442 is connected below the first segment 440, and its uniform inner diameter is smaller than that of the first segment 440. This structure forms an annular horizontal shoulder 450 on the inner circumferential surface of the channel at the junction of the two segments. This shoulder supports the nozzle 410. Starting from the end of the second segment 442, the inner radial direction of the third segment 444 gradually tapers downwards. The fourth segment 446 is connected below the third segment 444, and its inner diameter slightly expands from top to bottom. The fifth segment 448 is connected below the fourth segment 446 and typically has a uniform inner diameter. At the junction of the fourth segment 446 and the fifth segment 448, the inner circumferential surface of the channel forms a downwardly and outwardly expanding annular inner conical shoulder 452. The lower end of the fifth segment 448 forms the lower port of the water guide pipe 408.

[0122] The outlet pipe 418 of the water pump 404 is constructed as a two-stage coaxial pipe, comprising a thinner insert section 419 extending from top to bottom and a thicker main body section 421 connecting to the pump body. At the junction of the insert section 419 and the main body section 421, the outer surface of the outlet pipe 418 forms a downwardly and outwardly expanding annular conical shoulder 423. The outer diameter and shape of the insert section 419 substantially match the slightly expanded inner diameter and shape of the fourth section 446. The outer diameter and shape of the main body section 421 substantially match the inner diameter and shape of the fifth section 448.

[0123] When the outlet pipe 418 is inserted upward into the fluid channel 438, the insertion section 419 is basically located within the fourth section 446, and the main body section 421 is located within the fifth section 448. The outer conical shoulder 423 of the outlet pipe 418 abuts against and engages with the inner conical shoulder 452 within the fluid channel 438 to form a seal.

[0124] Based on the above, the first section 440 is the nozzle connection. The second section 442 and the third section 444 constitute a flow transition section, serving as the main delivery path to achieve a smooth fluid transition. Here, when water enters from the constricted lower port of the third section 444, its initial velocity is relatively high. As the water is transported upward along the expanded pipe radial direction, the expanded flow path reduces the upward flow velocity, facilitating the smooth entry of the water into the uniformly spaced second section 442 above, and finally allowing it to flow gently out from the nozzle 410. The fourth section 446 and the fifth section 448 constitute a pump interface for forming a fixed and sealed connection with the water pump 404.

[0125] The water conduit 408 also includes a radial flange 454 formed below the circular top plate 432 and surrounding the pipe wall 436. Its radial projection is such that its dimensions are larger than the outer diameter of the upper end of the pipe wall 436, forming the main outline of the pipe body below the top plate. The radial flange 454 has a shape adapted to the through hole 430 (e.g., a rectangle at a semi-circular end) and its dimensions are set to allow it to pass through the through hole 430.

[0126] On the outer peripheral surface of the radial flange 454, a plurality of hooks 456 with a generally triangular cross-section are provided at intervals, and these hooks are located at the same height. Each hook 456 has a horizontal top surface 458 spaced apart from the lower surface of the circular top plate 432, and a guide ramp 460 that slopes downward and inward from the horizontal top surface 458. When the water pipe 408 is inserted downward into the through hole 430, the guide ramp 460 contacts the edge of the through hole 430 and guides the radial flange 454 to deform downward. When the circular top plate 432 abuts against the upper surface of the tray 406, the hook 456 completely passes through the through hole 430, and its horizontal top surface 458 abuts against the lower surface of the tray 406, thereby preventing the water pipe 408 from being pulled upward. The thickness of the tray 406 is designed to be maintained between the circular top plate 432 and the hooks 456. During disassembly, the tube body can be radially squeezed to deform it, causing the hook 456 to disengage from the tray 406 and retract into the edge of the through hole 430, thereby allowing the water pipe to be pulled upwards and removed.

[0127] Nozzle 410 is detachably connected to water conduit 408. Nozzle 410 includes a downwardly extending riser tube 462. Its lower port is inserted into the upper port of water conduit 408 and abuts against a horizontal shoulder 450. Nozzle 410 is provided with a plurality of flow channels 464 surrounding the upper port of riser tube 462. Water discharged from water conduit 408 is further conveyed upward through riser tube 462, and then flows out through flow channels 464 and falls back into tray 406. Nozzle 410 includes a head formed by a plurality of petal-shaped outer walls 466. Flow channels 464 are defined by joints between adjacent petal-shaped outer walls 466.

[0128] The filter 412 is detachably mounted on the tray 406. On the surface of the tray 406, at a location spaced apart from the boss 428, a rectangular through-hole 468 communicating with the interior of the water tank 402 is provided. The filter 412 is inserted and installed through this rectangular through-hole 468 along its axial direction and positioned to protrude from the bottom of the tray 406 into the water tank 402. The filter 412 includes a filter housing 470, a filter cover 472, and a filter medium 474 (see [link to filter media]). Figure 22-23 ).

[0129] The filter housing 470 may be box-shaped. The filter medium 474 is housed within the housing 470. A filter cover 472 is disposed over the top opening of the filter housing 470, thereby substantially sealing the filter medium 474.

[0130] The filter cover 472 has an annular flange 476, a cover body 478 located below the flange 476, and a sleeve-shaped connecting wall 480. The upper end of the connecting wall 480 is connected to the inner periphery of the flange 476, and its lower end is connected to the outer periphery of the cover body 478, thus forming a countersunk platform 482 between the flange 476 and the cover body 478. The cover body 478 has at least one inlet 484, for example, multiple inlets 484 arranged in a grid pattern. The outer peripheral surface of the cylindrical connecting wall 480 is inserted into and fixed to the inner peripheral surface of the filter housing 470 by an interference fit. Preferably, the outer peripheral surface of the cylindrical connecting wall 480 may have multiple engaging protrusions 486, and the inner peripheral surface of the filter housing 470 may have multiple engaging holes or grooves 488 that mate with the engaging protrusions 486 to achieve snap-fit ​​fixation. The flange 476 covers the open end face of the filter housing 470. Multiple parallel ribs 489 are formed at the bottom of the cover body 478. These ribs enhance structural strength and, by pressing against the top of the filter medium 474, separate the filter medium 474 from the inlet 484, preventing the filter medium 474 from clogging the inlet 484 and ensuring smooth water flow.

[0131] The filter housing 470 is designed to be smaller than the through-hole 468 so that it can be installed through the through-hole 468. However, the flange 476 of the filter cover 472 is designed to be larger than the through-hole 468 so that it snaps against the outside of the through-hole 468 after installation, holding and supporting the filter 412 on the tray 406. An annular ridge 490 is formed on the surface of the tray 406 around the through-hole 468 and the flange 476. The annular ridge 490 engages tightly with the flange 476, forming a substantially sealed fit between them. The height of the annular ridge 490 is lower than the height of the resting flange 426 and the boss 428 of the tray 406, thereby forming a water collection area on the surface of the tray 406 that is lower than the height of the annular ridge 490.

[0132] The filter housing 470 is provided with at least one outlet 492. Water entering the filter 412 through the inlet 484 passes through the filter medium 474 and flows out from the filter outlet 492 into the water tank 402. Therefore, the water flowing out from the outlet 492 is filtered. In a preferred embodiment, the outlet 492 is located on the side wall of the filter housing 470, and its lowest point is higher than the bottom of the filter housing 470. Therefore, a sludge collection tank 494 is formed inside the filter housing 470 between the lowest point of the outlet 492 and the bottom of the housing. Impurities carried by the water flow can settle at the bottom under their own gravity and be collected in the sludge collection tank 494.

[0133] Filter media 474 may include a first filter media 496, a second filter media 498, and a third filter media 500. The first filter media 496 is a pre-filtration or chemical adsorption medium forming the first stage of filtration, used to remove odors, pigments, etc., and may be, for example, one or more activated carbon packets. The second filter media 498 is a coarse filtration or physical interception medium for large impurities forming the second stage of filtration, used to intercept hair, large sand particles, etc., and may be, for example, a coarse-pore sponge. Its dimensions are substantially equal to the cross-section of the middle portion of the filter housing 470 to ensure that all downward-flowing water must pass through it. The third filter media 500 is a fine filtration or physical interception medium for small impurities forming the third stage of filtration, used to intercept fine sand, clay particles, etc., and may be, for example, a fine-pore sponge, covering the outlet 492.

[0134] It is understood that filter media 474 may include fewer or more than three types, and can form multiple stages of filtration. The arrangement and shape of each stage of filter media can be adjusted as needed, generally following an order from coarse to fine to extend filter life. For example, the positions of the first filter media 496 and the second filter media 498 can be interchanged.

[0135] The filter 412 can be reusable or disposable, and its cover 472 is connected to the housing 470 in a similar manner to the aforementioned embodiments.

[0136] The filter cover 472 may include a handle 502 integrally formed with the flange 476 for easy gripping and lifting of the filter 412. The outer surface of the handle 502 may be provided with anti-slip texture.

[0137] The water circulation process of the pet drinking device 400 is as follows: The water pump 404 pumps water from the water tank 402 upwards, flowing sequentially through the water pipe 408 and the nozzle 410, and then falling along the guide channel 464 into the tray 406 for the pet to drink from. When the water level in the tray 406 rises above the annular ridge 490, the water overflows the annular ridge 490 and falls into the recessed platform 482. Some impurities in the water (such as hair) may be trapped in the recessed platform 482, while other impurities enter the filter 412 from the inlet 484 along with the water. The water filtered by the filter 412 flows out from the outlet 492 back into the water tank 402 and re-enters the water pump 404, thus achieving water circulation. Impurities are retained in the recessed platform 482 and the filter 412.

[0138] After prolonged use, if the filter 412 becomes clogged, preventing water from returning to the tank 402, the water level in the tray 406 will rise. When the water level rises above its resting flange 426, water can flow directly back to the tank 402 through the clearance notch 427. In some embodiments, an overflow hole (not shown) may also be provided on the filter housing 470. It is positioned above the filter medium 474 and offset vertically from the inlet 484. During normal use, water entering from the inlet 484 flows through the filter medium and then exits. When the filter medium becomes clogged, the water level inside the housing 470 rises to the overflow hole, and water can then flow directly back to the tank from the overflow hole.

[0139] The advantages of the pet drinking device 400 provided in this embodiment include: water circulation to maintain water quality; the settling platform 482 can intercept and collect some impurities; multi-stage filtration is possible; the sludge collection tank 494 can collect impurities; and the filter 412 is easy to replace and clean.

[0140] Figures 24 to 25 The illustration shows a pet watering device 600 according to a fourth embodiment of the present disclosure. The pet watering device 600 includes a water tank 602, a water pump 604, a tray 606, a water pipe 608, a nozzle 610, and a filter 612. The filter 612 has an annular flange 616 and a recess 620. The tray 606 has an annular ridge 622.

[0141] The structure of the pet drinking device 600 is basically the same as that of the pet drinking device 400 in the third embodiment. The main difference is that a cover plate 614 is additionally provided above the recessed platform 620 of the filter 612.

[0142] The cover plate 614 is plate-shaped, and its outline basically matches the flange 616 of the filter 612. After installation, the cover plate 614 covers the entire area of ​​the flange 616. The cover plate 614 has an elongated opening 618 for guiding water from the tray 606 into the settling platform 620 of the filter 612. This design can cover impurities that may settle in the settling platform 620, keeping the appearance clean and enhancing the overall aesthetics.

[0143] In some implementations, the cover 614 and tray 606 are typically made of the same material, such as stainless steel, while the filter 612 is made of plastic. The addition of the cover 614 makes the surface of the tray 606 appear as a larger area of ​​homogeneous material, enhancing the overall texture and harmony.

[0144] Another difference is that the pet water dispenser 600 extends the annular ridge 622 adjacent to the periphery of the tray 606 to directly connect with the periphery of the tray 606. This design creates a seamless connection between the two, eliminating the original steps and gaps, thereby fundamentally preventing the accumulation and residue of impurities in this narrow area.

[0145] The pet drinking device 600 of this embodiment inherits all the advantages of the third embodiment. Further improvements are achieved in aesthetics, ease of cleaning, and prevention of debris accumulation through the design of the cover 614 and the integrated, seamlessly connected annular ridge 622.

[0146] It should be noted that the specific embodiments described above are exemplary, and those skilled in the art may propose various solutions based on the teachings of this disclosure. All such solutions fall within the scope of this disclosure and the protection scope of this invention. Those skilled in the art should understand that the specification and accompanying drawings of this invention are illustrative and do not constitute a limitation on the claims. The protection scope of this invention is defined by the claims and their equivalents. The specification of this invention contains multiple inventive concepts; for example, "preferred," "alternative embodiment," or "optionally" means that the corresponding paragraph discloses an independent concept, and the applicant reserves the right to file separate applications based on each inventive concept. Throughout the document, features introduced by "preferred" are only optional features and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A filter for a pet drinking device, characterized in that, include: A filter housing having a top opening and at least one outlet; A filter cover, provided in the top opening, the filter cover having a flange for resting on a tray of a pet drinking device, and at least one inlet; The filter medium is contained within the filter housing; The filter cover also includes a recessed platform located between the flange and the cover body, the recessed platform being used to collect impurities.

2. A filter for a pet drinking device, characterized in that, include: The filter housing is cylindrical or cup-shaped and has a top opening; A central riser is located in the center of the interior of the filter housing, extending from a position near the top opening to the bottom exterior of the filter housing. The lower port of the central riser is used to connect to the outlet of the water pump. A filter cover is provided at the top opening, the filter cover having an inlet surrounding the central riser; The filter medium is housed within the filter housing and arranged around the central riser. The outer wall of the filter housing includes an upper wall and a lower wall, and an annular support is formed at the connection between the upper wall and the lower wall. The filter medium includes a first filter medium located above the annular support and a second filter medium located below the annular support.

3. A filter for a pet drinking device, characterized in that, include: The filter housing has a top opening, an annular shoulder on the outer periphery, and an outlet located below the annular shoulder; A filter cover, disposed at the top opening, has an annular flange; The filter medium is contained within the filter housing; The annular flange is used to support the first tray of the pet water dispenser, the annular shoulder is used to support the second tray of the pet water dispenser, and the filter cover has an inlet below the annular flange.

4. A filter for a pet drinking device, characterized in that, include: A filter housing having a top opening and at least one outlet; A filter cover, provided in the top opening, the filter cover having a flange for resting on a tray of a pet drinking device, and at least one inlet; A filter basket, detachably disposed on the upper part of the filter housing, is used to contain the first filter medium; The second filter medium is contained within the filter housing and located below the filter basket; The filter basket has a first opening at the top and a second opening at the bottom on its side wall. The first opening is for water inlet and the second opening is for water outlet.

5. A pet drinking device, characterized in that, include: A water tank is used to hold water. A tray, positioned above the water tank, has mounting through holes; A water guide pipe, detachably mounted to the tray, the water guide pipe comprising: The tube body has a fluid passage; A radial flange is provided on the outer periphery of the tube body for passing through the mounting through hole; At least one hook portion is disposed on the outer peripheral surface of the radial flange, the hook portion having a horizontal top surface; When the water guide pipe is installed on the tray, the radial flange passes through the mounting through hole, the horizontal top surface abuts against the lower surface of the tray, and the upper end of the water guide pipe abuts against the upper surface of the tray, thereby locking the water guide pipe to the tray.

6. A water pipe for a pet drinking device, characterized in that, include: The pipe body has a fluid channel, which includes a pump interface, a flow transition section and a nozzle connection section connected sequentially from bottom to top; A radial flange is provided on the outer periphery of the tube body for passing through the mounting through hole on the tray of the pet drinking device; At least one hook is disposed on the outer peripheral surface of the radial flange, the hook having a horizontal top surface and a guide slope that slopes downward and inward from the horizontal top surface; An inner conical shoulder is formed between the pump interface and the flow transition section, which is used to seal against the outer conical shoulder on the water pump outlet.

7. An observation window for a pet drinking device, characterized in that, include: The main body of the window is bowl-shaped and has an observation section for passing through the mounting port on the side wall of the water tank, and a plurality of studs arranged around the observation section; A sealing ring is used to be installed between the window body and the side wall of the water tank; Fasteners, used to pass through the mounting opening and engage with the studs to secure the window body to the side wall of the water tank; A decorative retaining ring is used for external installation of the water tank, fitting around the outer periphery of the observation section and covering the fastener.

8. A pet drinking device, characterized in that, include: A water tank for holding water, wherein an installation port is provided on the side wall of the water tank; The main body of the window is bowl-shaped and is installed from the inside of the water tank outward. It has an observation part that passes through the installation opening, multiple studs arranged around the observation part, and buckles arranged on the side wall of the observation part. A sealing ring is disposed between the window body and the side wall of the water tank; Fasteners, passing through the mounting opening and engaging with the studs, fix the window body to the side wall of the water tank; A decorative retaining ring is installed from the outside of the water tank and fitted around the outer periphery of the observation section. The decorative retaining ring includes a claw, and the claw has a groove that engages with the buckle.

9. A pet drinking device, characterized in that, include: A water tank is used to hold water. The first tray, positioned above the water tank, has a first through hole; The second tray is disposed above the first tray and has a second through hole; A filter, installed sequentially through the second through hole and the first through hole, comprises: A filter housing having a top opening and at least one outlet; A filter cover, disposed at the top opening, has an annular flange; The filter medium is contained within the filter housing; The annular flange rests on the second tray, the outer periphery of the filter housing is provided with an annular shoulder that rests on the first tray, and the filter cover is provided with an inlet below the annular flange.

10. A pet drinking device, characterized in that, include: A water tank is used to hold water. A tray is positioned above the water tank, and the tray has a through-hole mounting opening. A filter is disposed at the mounting port, the filter comprising a filter housing, a filter cover, and a filter medium contained within the filter housing; The filter is detachably mounted on the tray in a vertical direction, the filter cover is provided with a resting part for resting on the upper surface of the tray, and the filter housing extends downward through the mounting port into the interior of the water tank; The filter is configured such that it can be installed by inserting it vertically downwards from the top of the tray and completely removed from the installation port by lifting it vertically upwards from the top of the tray. Both the installation and removal of the filter are performed from the outside of the pet drinking device.

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