Pet water fountain

Abstract

The application discloses a pet water dispenser, which comprises a water tank, a purified water outlet, a pump, a filter device, a first air vent and a water drinking part. The water tank has a water storage cavity. The filter device comprises a shell, a raw water space, a purified water space and a filter core. The filter core is located between the raw water space and the purified water space. The purified water outlet is communicated with the purified water space. The first air vent is communicated with the raw water space. The raw water space is communicated with the atmosphere outside the body of the pet water dispenser via the first air vent. The first air vent is higher than the highest liquid level of the raw water space. When the pump is working, the liquid in the water storage cavity enters the raw water space. The gas in the raw water space is at least partially discharged to the outside of the body via the first air vent. The liquid in the raw water space passes through the filter core and enters the purified water space. The gas in the purified water space is discharged from the pet water dispenser via the purified water outlet. The liquid in the purified water space is output to the water drinking part via the purified water outlet. The application can ensure smooth water outlet when the pet water dispenser is started.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pet water drinking equipment, in particular to a pet water drinking machine. BACKGROUND

[0002] With the improvement of people's living standards, more and more families begin to raise pets, and more and more attention is paid to the health of pets. For pet water drinking machine products, the general consideration is to enable pets to drink healthy and clean water.

[0003] In order to enable pets to drink healthy and clean water, some pet water drinking machines are provided with filter elements to filter water, and water is pumped to the filter element by a pump, and filtered water is output for pets to drink. In the empty state of the filter element, if the water drinking machine is started, the air in the filter element needs to be discharged first, and then the water can pass through the filter element for filtration. Due to the deficiency of the existing water drinking in the air exhaust of the filter element, the water drinking machine is prone to not output water or the water flow is small when it is started. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a pet water drinking machine, which is designed to discharge air from the filter element, so that the machine can quickly discharge air when started, and ensure smooth water output.

[0005] The present application provides a pet water drinking machine, comprising:

[0006] a water tank having a water storage cavity;

[0007] a filter element comprising a housing, a raw water space, a purified water space, and a filter core, the filter core being between the raw water space and the purified water space;

[0008] a purified water outlet in communication with the purified water space;

[0009] a pump comprising a pump inlet and a pump outlet, the pump inlet being in communication with the water storage cavity, the pump outlet being in communication with the raw water space, the pump being used to send the liquid in the water storage cavity from the pump inlet to the pump outlet;

[0010] a water drinking part for containing liquid for drinking;

[0011] a first air vent in communication with the raw water space, the raw water space being in communication with the atmosphere outside the body of the pet water drinking machine via the first air vent, and the first air vent being higher than the highest liquid level of the raw water space;

[0012] The pump works, the liquid in the water storage cavity enters the raw water space, the gas in the raw water space is at least partially discharged to the outside of the body via the first exhaust hole, the liquid in the raw water space passes through the filter core and enters the clean water space, the gas in the clean water space is discharged from the pet water dispenser via the clean water outlet, and the liquid in the clean water space is output to the water drinking part via the clean water outlet.

[0013] Optionally, it further comprises a buffer space, which is in communication with the clean water space and the clean water outlet, and is used for buffering the liquid flowing from the clean water space to avoid the liquid being directly sprayed from the clean water outlet; the liquid in the clean water space first flows into the buffer space and then flows from the buffer space to the clean water outlet.

[0014] Optionally, the first exhaust hole is in communication with the buffer space and communicates the raw water space with the clean water outlet; when the liquid is input into the raw water space, the gas in the raw water space is discharged from the clean water outlet via the first exhaust hole and the buffer space.

[0015] Optionally, the buffer space is located above the clean water space.

[0016] Optionally, the shell is provided with the raw water space, the clean water space and the filter core, the shell comprises an upper end cover located at the top and a lower end cover located at the bottom, the clean water outlet is arranged on the upper end cover, a connecting pipe is arranged around the clean water outlet on the upper end cover, and the buffer space is arranged inside the connecting pipe.

[0017] Optionally, the first exhaust hole is arranged on the connecting pipe.

[0018] Optionally, a filter core water outlet is arranged on the shell, the clean water space and the buffer space are in communication through the filter core water outlet, and the filter core water outlet is arranged staggered with the clean water outlet.

[0019] Optionally, the filter core comprises a filter core body and a filter core end cover connected to the upper part of the filter core body, the lower end of the filter core body is arranged on the lower end cover, the filter core end cover is connected with the connecting pipe,

[0020] The filter core is internally provided with the clean water space, the filter core end cover is provided with the filter core water outlet which communicates the clean water space with the buffer space, and the water outlet direction of the filter core water outlet deviates from the clean water outlet.

[0021] Optionally, the buffer space is formed by the connecting pipe and the filter core end cover.

[0022] Optionally, the clean water outlet is located above the raw water space.

[0023] Optionally, the second projection and the first projection corresponding to the normal projection of the buffer space and the purified water space on the plane where the bottom surface of the filter device is located overlap, and the second projection is smaller than the first projection.

[0024] Optionally, the shell is provided with a second air outlet hole, and the second air outlet hole communicates the raw water space and the water storage cavity; when the pump is working, at least part of the gas in the raw water space is discharged into the water storage cavity through the second air outlet hole.

[0025] Optionally, the raw water space is arranged outside the purified water space, the purified water space and the buffer space are communicated through a filter core water outlet, the buffer space and the purified water outlet are communicated, and the filter core water outlet and the purified water outlet are arranged staggeredly.

[0026] When the pump is working, the liquid in the water storage cavity is transported from bottom to top to the raw water space, the gas in the raw water space is discharged through the first air outlet hole and the second air outlet hole, the liquid in the raw water space passes through the filter core into the purified water space laterally, the gas in the purified water space enters the buffer space through the filter core water outlet, the gas in the buffer space is discharged through the purified water outlet, and the liquid in the purified water space enters the buffer space through the filter core water outlet from bottom to top, and the liquid in the buffer space is transported to the drinking water part through the purified water outlet.

[0027] Optionally, a ring body is arranged around the filter core water outlet on the filter core end cover, and the ring body is sealed and matched with the connecting pipe through a sealing element.

[0028] Optionally, a communication part is arranged on the connecting pipe, and after the connecting pipe is tightly combined with the ring body, the part of the communication part which communicates the buffer space and the raw water space constitutes the first air outlet hole.

[0029] Optionally, the communication part is a hole or a notch arranged on the connecting pipe.

[0030] Optionally, the upper portion of the shell is provided with a first air outlet hole, and the first air outlet hole communicates the raw water space and the buffer space.

[0031] Optionally, the opening area of the first air outlet hole is 10mm 2 ~ 14mm 2 .

[0032] Optionally, the second air outlet hole is flush with the highest liquid storage surface of the raw water space, and when the liquid level of the liquid in the raw water space exceeds the highest liquid storage surface of the raw water space, the liquid in the raw water space can be discharged into the water storage cavity through the second air outlet hole.

[0033] Optionally, the lower end cover is provided with a water inlet, an exhaust port, a water outlet column and an exhaust column, the water inlet and the exhaust port penetrating the upper surface and the lower surface of the lower end cover, the water outlet column and the exhaust column being vertically arranged in the raw water space, the lower end of the water outlet column being open to communicate with the water inlet, the upper end of the water outlet column being open to form a filter core water inlet, the lower end of the exhaust column being open to communicate with the exhaust port, the upper end of the exhaust column being open to form the second exhaust hole, the second exhaust hole being higher than the filter core water inlet.

[0034] Optionally, the pump outlet communicates with the water inlet through a water outlet pipe, the exhaust port is configured to face the water inlet,

[0035] When the liquid level in the raw water space exceeds the highest liquid storage surface of the raw water space, the liquid in the raw water space can reach the exhaust port through the second exhaust hole and backflow to the water storage cavity along the water outlet pipe.

[0036] Optionally, the opening area of the exhaust port is 2mm 2 -5mm 2 .

[0037] Optionally, the lower end cover is further provided with a positioning column, the positioning column being located in the raw water space, the edge of the filter core end cover being provided with a first positioning hole and a second positioning hole,

[0038] the lower end of the positioning column being connected to the lower end cover, the upper end of the positioning column being matched with the positioning part of the upper end cover after penetrating the first positioning hole, the exhaust column penetrating the second positioning hole, the second exhaust hole of the exhaust column having a gap with the upper end cover.

[0039] Optionally, the first positioning hole and the second positioning hole are different in size and / or shape.

[0040] Optionally, the top of the upper end cover has a flow guide surface extending from the purified water outlet to the drinking water part, the flow guide surface being arranged as a recess extending from the vicinity of the purified water outlet to at least part of the edge of the upper end cover.

[0041] Optionally, a drinking water tray is arranged at the open upper end of the water tank, at least part of the drinking water tray constituting the drinking water part.

[0042] Optionally, the drinking water tray has a recessed purified water holding part and a backflow hole arranged beside the purified water holding part, the purified water holding part constituting the drinking water part, the backflow hole communicating with the water storage cavity, liquid exceeding the highest liquid storage surface of the drinking water part being able to backflow to the water storage cavity through the backflow hole.

[0043] Optionally, the depth of the drinking water part is not less than 20 mm, the depth refers to the vertical distance between the backflow hole and the bottom surface of the drinking water part.

[0044] Optionally, the upper part of the water tank is further provided with a primary filter, the primary filter has a filter part, the filter part is used for filtering the liquid flowing back from the drinking water part to the water storage cavity.

[0045] Optionally, the filter part is below the drinking water part, the filter part includes a backflow port, and the backflow port is provided with a second filter structure.

[0046] Optionally, the filter part further includes a buffer area and a flow guide groove surrounding the buffer area, the flow guide groove is in fluid communication with the backflow port; the buffer area is arranged to protrude towards the drinking water part, and the liquid flowing out of the backwater hole is shunted and collected to the flow guide groove through the buffer area, and then flows into the water storage cavity through the backflow port along the flow guide groove.

[0047] Optionally, the primary filter has a receiving part, the drinking water disc is provided with a mounting hole, the lower part of the filter part is arranged on the receiving part, the upper part of the filter part passes through the mounting hole, and the clean water outlet is higher than the drinking water part.

[0048] Optionally, the height of the mounting hole from the bottom surface of the drinking water part is greater than the height of the backwater hole from the bottom surface of the drinking water part.

[0049] Optionally, the receiving part includes a mounting groove and a through hole arranged in the mounting groove, the water inlet of the lower end cover is opposite to the through hole, the pump outlet is in communication with the inlet of the water outlet pipe, the outlet of the water outlet pipe passes through the through hole and is connected with the water inlet, and the exhaust port of the lower end cover is exposed from the through hole.

[0050] Optionally, the pump is arranged at the bottom of the water tank and includes:

[0051] A pump housing, the pump inlet and the pump outlet are arranged on the housing, and the bottom surface of the pump housing is in contact with the bottom surface of the water tank.

[0052] An impeller, including an impeller water inlet and an impeller water outlet, the impeller water inlet is in communication with the pump inlet, and the impeller water outlet is in communication with the pump outlet.

[0053] An impeller cover between the pump inlet and the impeller water inlet, including an impeller cover water inlet and an impeller cover water outlet, the impeller cover water outlet is in communication with the impeller water inlet, and the distance from the impeller cover water inlet to the bottom surface of the pump housing is less than the distance from the impeller cover water outlet to the bottom surface of the pump housing.

[0054] A water deficiency probe is connected to the pump shell, and the distance from the water deficiency probe to the bottom surface of the pump shell is greater than the distance from the upper end of the impeller cover water inlet to the bottom surface of the pump shell, wherein the upper end of the impeller cover water inlet refers to the end farthest from the bottom surface of the pump shell.

[0055] Optionally, the pump inlet is arranged on one side of the pump shell, the water deficiency probe is arranged on the other side of the pump shell opposite to the pump inlet, and the pump outlet is arranged on the top of the pump shell.

[0056] Optionally, the impeller cover water inlet is directed towards the bottom surface of the pump shell.

[0057] Optionally, the distance from the water deficiency probe to the bottom surface of the pump shell is greater than the distance from the upper end of the impeller cover water outlet to the bottom surface of the pump shell, wherein the upper end of the impeller cover water outlet refers to the end farthest from the bottom surface of the pump shell.

[0058] Optionally, the pump inlet is provided with a first filter structure.

[0059] Optionally, the pump is a wireless water pump.

[0060] Optionally, the filter core is a polypropylene activated carbon filter core, and a hydrogen ion exchange resin member and a potassium ion exchange resin member are arranged in the raw water space.

[0061] Optionally, the pet water dispenser further comprises a UV lamp installed in the water storage cavity, for sterilizing the liquid in the water storage cavity.

[0062] Optionally, the pet water dispenser further comprises a descaling filter arranged in the raw water space, for removing calcium and magnesium ions in the liquid in the raw water space.

[0063] Optionally, the water bowl is made of stainless steel.

[0064] The above-mentioned scheme has the following beneficial effects:

[0065] The pet water dispenser provided by the embodiment of the present application has a filter device with a raw water space and a purified water space, and a filter core is arranged between the raw water space and the purified water space. The raw water space is in communication with the atmosphere outside the machine body through a first exhaust hole, and the purified water space is in communication with the outside through a purified water outlet. When the pump is working, the liquid in the liquid storage cavity is pumped to the raw water space, and the gas in the raw water space can be exhausted to the outside of the machine body through the first exhaust hole. With the liquid in the raw water space entering the purified water space, the gas in the purified water space is exhausted from the purified water outlet, and after the purified water space is filled with liquid, the liquid in the purified water space is output through the purified water outlet. In this process, the exhaust path of the gas in the filter device is consistent with the flow path of the liquid in the filter device, so that the gas in the filter device can be rapidly exhausted under the continuous injection of the liquid, and the smooth water output of the pet water dispenser when starting is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0066] Figure 1 FIG. 1 is a structural schematic diagram of a pet water dispenser provided by the embodiment of the present application;

[0067] Figure 2 FIG. 2 is an exploded schematic diagram of the pet water dispenser provided by the embodiment of the present application;

[0068] Figure 3 FIG. 3 is a sectional view of the pet water dispenser provided by the embodiment of the present application;

[0069] Figure 4 FIG. 4 is a sectional view of the pet water dispenser provided by the embodiment of the present application;

[0070] Figure 5 FIG. 5 is a structural schematic diagram of a primary filter provided by the embodiment of the present application;

[0071] Figure 6 FIG. 6 is a sectional view of the filter device provided by the embodiment of the present application;

[0072] Figure 7 FIG. 7 is a structural schematic diagram of an upper end cover and a middle shell after assembly provided by the embodiment of the present application;

[0073] Figure 8 FIG. 8 is a structural schematic diagram of a lower end cover provided by the embodiment of the present application;

[0074] Figure 9 FIG. 9 is a structural schematic diagram of a lower end cover provided by the embodiment of the present application;

[0075] Figure 10 FIG. 10 is a structural schematic diagram of a pump provided by the embodiment of the present application;

[0076] Figure 11 FIG. 11 is an internal structural schematic diagram of the pump provided by the embodiment of the present application;

[0077] Figure 12 FIG. 12 is a flow path of the liquid in the pump provided by the embodiment of the present application;

[0078] Figure 13 is a flow path of liquid in the pet water dispenser provided by the embodiment of the present application;

[0079] Figure 14 is a flow path of gas in the pet water dispenser provided by the embodiment of the present application.

[0080] In the figure:

[0081] 100 water tank, 101 water storage cavity, 102 inner shell of water tank, 103 outer shell of water tank, 104 supporting ring, 105 mounting table, 108 inner shell body,

[0082] 200 pump, 201 pump inlet, 202 pump outlet, 203 water shortage probe, 204 pump shell, 205 impeller, 206 impeller cover, 209 water inlet of impeller cover, 210 water outlet of impeller cover, 211 first filter structure,

[0083] 300 filter device, 301 shell, 302 filter core, 303 raw water space, 304 clean water space, 305 clean water outlet, 307 buffer space, 308 first exhaust hole, 309 upper end cover, 310 lower end cover, 311 middle shell, 312 filter core body, 313 filter core end cover, 314 second exhaust hole, 315 filter core water outlet, 316 first connecting pipe, 317 ring body, 319 water inlet, 320 exhaust port, 321 water outlet column, 322 exhaust column, 323 positioning column, 324 first positioning hole, 325 second positioning hole, 326 positioning part, 327 gap, 328 flow guide surface, 329 sealing element, 330 filter core water inlet,

[0084] 400 water drinking plate, 401 water drinking part, 402 backflow hole, 403 mounting hole,

[0085] 500 primary efficiency filter device, 501 mounting groove, 502 through hole, 503 filter part, 504 buffer area, 505 backflow port, 506 flow guide groove, 507 receiving part,

[0086] 600 electrical device,

[0087] 700 water outlet pipe. DETAILED DESCRIPTION

[0088] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0089] Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but merely represents selected embodiments of the application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the application without creative labor fall within the scope of protection of the application.

[0090] It should be noted that similar reference numbers and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0091] In the description of the application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is usually placed, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0092] In the description of the application, it should also be noted that, unless otherwise specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0093] In the present application, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "above" and "on" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0094] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like or similar constituent elements or features may be denoted by like reference characters throughout the drawing figures and the description. The embodiments described below are exemplary only, and are not intended to be limiting of the present application.

[0095] The present embodiment provides a pet water dispenser, which at least comprises a water tank 100, a pump 200, a filter device 300, a purified water outlet 305, a water drinking part 401 and a first air vent 308. The water tank 100 has a water storage cavity 101; the filter device 300 comprises a housing 301, a raw water space 303, a purified water space 304 and a filter core 302, the filter core 302 being between the raw water space 303 and the purified water space 304; the purified water outlet 305 is in communication with the purified water space 304; the pump 200 comprises a pump inlet 201 and a pump outlet 202, the pump inlet 201 being in communication with the water storage cavity 101, and the pump outlet 202 being in communication with the raw water space 303, the pump 200 being used to send the liquid in the water storage cavity 101 from the pump inlet 201 to the pump outlet 202; the water drinking part 401 is used to hold liquid for drinking; the first air vent 308 is in communication with the raw water space 303, the raw water space 303 being in communication with the atmosphere outside the body of the pet water dispenser via the first air vent 308, and the first air vent 308 being higher than the highest liquid storage level of the raw water space 303. When the pump 200 is working, the liquid in the water storage cavity 101 enters the raw water space 303, the gas in the raw water space 303 is at least partially discharged to the outside of the body via the first air vent 308, the liquid in the raw water space 303 passes through the filter core 302 to enter the purified water space 304, the gas in the purified water space 304 is discharged from the pet water dispenser via the purified water outlet 305, and the liquid in the purified water space 304 is output to the water drinking part 401 via the purified water outlet 305. The liquid in the raw water space 303 is naturally driven to pass through the filter core 302 to enter the purified water space 304 by the continuously pumped liquid, the liquid flow rate is slow, and the liquid can be fully filtered, so as to provide healthy and clean drinking water for pets.

[0096] The pet water dispenser further comprises a buffer space 307, which is located above the purified water space 304. The buffer space 307 is in communication with the purified water space 304 and the purified water outlet 305, and is used to buffer the liquid flowing out from the purified water space 304, so as to avoid the liquid being directly sprayed out from the purified water outlet 305; the liquid in the purified water space 304 first flows into the buffer space 307, and then flows from the buffer space 307 to the purified water outlet 305. The setting of the buffer space can reduce the water outlet pressure, and avoid the water spraying phenomenon at the purified water outlet.

[0097] In a possible implementation, the shell 301 comprises an upper end cover 309 at the top and a lower end cover 310 at the bottom. The shell 301 is internally provided with a raw water space 303, a purified water space 304, and a filter element 302. The purified water outlet 305 is arranged on the upper end cover 309 and above the raw water space 303, and the upper end cover 309 is further provided with a connecting pipe 316 around the purified water outlet 305, and the first air vent 308 is arranged on the connecting pipe 316. The connecting pipe 316 and the filter element end cover 313 jointly form a buffer space 307, the first air vent 308 communicates the raw water space 303 with the buffer space 307, and the buffer space 307 communicates with the purified water outlet 305. When the raw water space 303 is input with liquid, the gas in the raw water space 303 is discharged from the purified water outlet 305 via the first air vent 308 and the buffer space 307. During the water injection process of the pet water dispenser, the air in the raw water space is discharged out of the body via the first air vent under the continuous water flow extrusion, which can ensure smooth water flow of the purified water outlet. Moreover, the first air vent is arranged inside the body, which can avoid the entry of external dust and other garbage into the body through the first air vent, and can ensure the cleanliness of the pet water.

[0098] Specifically, a normal projection of the buffer space 307 on a plane where the bottom surface of the filter device 300 is located is a second projection, a normal projection of the purified water space 304 on the plane where the bottom surface of the filter device 300 is located is a first projection, the second projection overlaps the first projection, and the second projection is smaller than the first projection.

[0099] In a possible implementation, the shell 301 is provided with a filter element water outlet 315, the purified water space 304 and the buffer space 307 communicate through the filter element water outlet 315, and the filter element water outlet 315 is arranged staggered with the purified water outlet 305. Specifically, the filter element 302 comprises a filter element body 312 and a filter element end cover 313 connected to the upper portion of the filter element body 312, the lower end of the filter element body 312 is arranged on the lower end cover 310, and the filter element end cover 313 is connected with the connecting pipe 316. The inside of the filter element 302 is the purified water space 304, the filter element end cover 313 is provided with the filter element water outlet 315 which communicates the purified water space 304 with the buffer space 307, and the water outlet direction of the filter element water outlet 315 deviates from the purified water outlet 305. The filter element water outlet 315 is arranged staggered with the purified water outlet 305, which avoids the water from the filter element water outlet directly sprayed from the purified water outlet, slows down the water flow of the purified water outlet, and creates the effect of natural water flow.

[0100] In a possible implementation, please refer to Figure 1 and Figure 2The pet water dispenser comprises a water tank 100, a pump 200, a filter device 300, a water tray 400 and a primary filter 500. The water tank 100 has a water storage cavity 101 inside. The primary filter 500 is arranged on the upper portion of the water tank 100 and adjacent to the upper opening of the water tank 100. The water tray 400 is arranged on the upper opening of the water tank 100 and above the primary filter 500. The lower portion of the filter device 300 is arranged on the primary filter 500, and the upper portion of the filter device 300 passes through the water tray 400. The water tray 400 has a water drinking portion 401 and a water return hole 402. The water outlet 305 on the top of the filter device 300 is higher than the water drinking portion 401. The liquid flowing out of the water outlet 305 can flow into the water drinking portion 401 from top to bottom. The water drinking portion 401 has a certain liquid storage capacity. When the liquid level in the water drinking portion 401 is higher than the water return hole 402, the excess liquid can flow into the water storage cavity 101 through the water return hole 402 and the primary filter 500. The pump 200 is arranged in the water storage cavity 101. The pump outlet 202 is communicated with the filter device 300 through the primary filter 500. When the pump 200 works, the liquid in the water storage cavity 101 is pumped to the filter device 300. The filtered liquid flows into the water drinking portion 401 from the water outlet 305 for the pet to drink. The excess liquid returns to the water storage cavity 101 through the water return hole 402, forming a liquid circulation, ensuring that the liquid in the water drinking portion 401 is filtered, and providing healthy and clean drinking water for the pet.

[0101] Please refer to Figure 4 The water tank 100 can comprise a water tank shell 103, a water tank inner shell 102 and electrical devices 600. The water tank inner shell 102 is partially contained in the water tank shell 103. The bottom of the water tank inner shell 102 and the bottom of the water tank shell 103 form a mounting space. The electrical devices 600 are arranged in the mounting space. The electrical devices include but are not limited to a power board, a key board and wires. The power board is electrically connected to the key board through the wires. The key board is connected to the operation keys arranged on the water tank shell 103. The power board is powered through an external power line. Specifically, the water tank inner shell 102 comprises an inner shell body 108 and a support ring 104. The support ring 104 is connected to the upper opening of the inner shell body 108 and arranged coaxially with the upper opening of the inner shell body 108. The support ring 104 and the inner shell body 108 form a mounting table 105. The water tank inner shell 102 is supported at the upper opening of the water tank shell 103 through the lower edge of the mounting table 105. The inner shell body 108 is contained in the water tank shell 103. The support ring 104 is higher than the upper opening of the water tank shell 103.

[0102] Please refer to Figure 1The water bowl 400 is arranged on the upper end of the support ring 104 of the water tank inner shell 102. The water bowl 400 can be made of plastic or stainless steel, and has the characteristics of being resistant to falling and biting, and not easy to deform. At least part of the water bowl 400 constitutes a drinking water part 401. Specifically, the water bowl 400 has a concave water holding part and a backflow hole 402 arranged beside the water holding part. The water holding part constitutes the drinking water part 401, and the backflow hole 402 is connected to the water storage cavity 101. Liquid exceeding the highest liquid level of the drinking water part 401 can flow back to the water storage cavity 101 through the backflow hole 402. Optionally, the backflow hole 402 can be a strip-shaped opening partially surrounding the water holding part, or one or more holes surrounding the water holding part. The highest liquid level of the drinking water part 401 is determined by the backflow hole 402 arranged beside the drinking water part 401. Specifically, the highest liquid level of the drinking water part 401 is flush with the point closest to the drinking water part 401 above the backflow hole 402. Once the liquid level in the drinking water part 401 exceeds this point, the liquid will flow out of the backflow hole 402. Optionally, in order to ensure the stability of the water in the drinking water part 401, so that the pet can smoothly drink the drinking water in the drinking water part 401, the depth of the drinking water part 401 is designed to be not less than 20 mm, wherein the depth refers to the vertical distance between the backflow hole 402 and the bottom surface of the drinking water part 401.

[0103] Further, the water bowl 400 is also provided with a mounting hole 403, and the filter device 300 can pass through the mounting hole 403, so as to guide the filtered liquid from the water outlet 305 at the top of the filter device 300 to the drinking water part 401. Specifically, the height of the mounting hole 403 from the bottom surface of the drinking water part 401 is greater than the height of the backflow hole 402 from the bottom surface of the drinking water part 401, i.e. the mounting hole 403 is arranged to be higher than the backflow hole 402. In this way, the excess liquid in the drinking water part 401 flows out of the backflow hole 402 and does not flow out of the mounting hole 403, avoiding the liquid in the drinking water part 401 flowing into the water storage cavity 101 without being filtered by the primary filter 500.

[0104] The primary filter 500 is arranged at the upper end opening of the inner shell 108 of the water tank inner shell 102, and the edge of the primary filter 500 is in contact with the upper edge of the mounting table 105. Please refer to Figure 5The primary filter 500 includes a filtering part 503 below the water drinking part 401, which is used to filter the liquid flowing back from the water drinking part 401 to the water storage cavity 101. The filtering part 503 includes a backflow port 505, and a second filter structure is arranged at the backflow port 505. Optionally, the second filter structure can be a filter screen. Although the liquid delivered to the water drinking part is filtered, hair, food residues and other impurities may be brought in during the pet drinking process. Therefore, the primary filter is arranged to filter the liquid before it is returned to the water storage cavity from the water drinking part, and the second filter structure is used to intercept the hair and large-particle impurities in the liquid, so as to ensure that the liquid in the water storage cavity is free of large-particle impurities and avoid the blockage of the later-stage filter. Optionally, the filtering part 503 further includes a buffer area 504 and a flow guide groove 506 surrounding the buffer area 504, and the flow guide groove 506 is in fluid communication with the backflow port 505. The buffer area 504 is arranged to protrude towards the water drinking part 401, and the liquid flowing out of the water outlet hole 402 is collected in the flow guide groove 506 through the buffer area 504, and then flows into the water storage cavity 101 through the backflow port 505. This design reduces the flow rate of the liquid through the buffer area 504. Since the interception effect of the filtering part 503 on impurities is higher at a low flow rate, the filtering effect can be improved, and the sound of flowing water is also reduced when the liquid enters the water storage cavity 101 through the backflow port 505. In addition, the buffer area can avoid the accumulation of liquid on the primary filter,

[0105] Further, the primary filter 500 further includes a receiving part 507 arranged side by side with the filtering part 503, and the receiving part 507 is below the filter device 300 and used to support the filter device 300. The receiving part 507 includes a mounting groove 501 and a through hole 502 arranged in the mounting groove 501, and the lower part of the filter device 300 is accommodated in the mounting groove 501. The pump outlet 202 of the pump 200 is in communication with the inlet of the water outlet pipe 700, and the water inlet 319 of the filter device 300 is in communication with the water outlet pipe 700 at the through hole 502. In this way, the liquid pumped from the pump inlet 201 to the pump outlet 202 can enter the filter device 300 through the water outlet pipe 700 to complete the filtration.

[0106] The pump 200 is arranged at the bottom of the water tank 100, and the pump 200 is provided with a water shortage probe 203. The water shortage probe 203 is located at a position of the pump 200 away from the bottom of the water tank 100, and the pump 200 stops working when the water shortage probe 203 is higher than the liquid level in the water storage cavity 101. In the related prior art, the water shortage probe is usually designed to be close to the bottom surface of the pump to pump as much liquid as possible. However, the inventors have found that in the process of pumping liquid from bottom to top by the pump, although the design of the water shortage probe close to the bottom surface of the pump can make the pump pump more liquid, due to insufficient water pressure, the liquid pumped from the pump inlet to the pump outlet will flow out of the pump outlet, resulting in a situation that the pet water dispenser does not dispense water although the pump is working. Based on this, the structure of the pump is improved and designed in this embodiment to ensure that the liquid pumped by the pump enters the filter device and does not directly flow out of the pump outlet.

[0107] Please refer to Figure 10 and Figure 11 , the pump 200 includes a pump shell 204, an impeller 205, an impeller cover 206 and a water shortage probe 203: the pump inlet 201 and the pump outlet 202 are arranged on the pump shell 204, and the bottom surface of the pump shell 204 is in contact with the bottom surface of the water tank 100; the impeller 205 includes an impeller inlet and an impeller outlet, the impeller inlet is communicated with the pump inlet 201, and the impeller outlet is communicated with the pump outlet 202; the impeller cover 206 is located between the pump inlet 201 and the impeller inlet, and includes an impeller cover inlet 209 and an impeller cover outlet 210, the impeller cover outlet 210 is communicated with the impeller inlet, and the distance from the impeller cover inlet 209 to the bottom surface of the pump shell 204 is less than the distance from the impeller cover outlet 210 to the bottom surface of the pump shell 204; the water shortage probe 203 is connected to the pump shell 204, and the distance from the water shortage probe 203 to the bottom surface of the pump shell 204 is greater than the distance from the upper end of the impeller cover inlet 209 to the bottom surface of the pump shell 204, wherein the upper end of the impeller cover inlet 209 refers to the end farthest from the bottom surface of the pump shell 204, that is, the height of the water shortage probe 203 relative to the bottom surface of the pump shell 204 is greater than the height of the impeller cover inlet 209 relative to the bottom surface of the pump shell 204. In this embodiment, the impeller cover is arranged between the pump inlet and the impeller inlet to reduce the height of the impeller inlet, so that when the liquid level does not completely submerge the impeller inlet but submerges the impeller cover inlet, the pump can still successfully pump the liquid to the filter device, avoiding too much liquid remaining in the water storage cavity. Further, by setting the distances of the water shortage probe and the impeller cover inlet relative to the bottom surface of the water tank, the liquid in the water storage cavity can be pumped to the filter device, and when the liquid in the water storage cavity is reduced to be unable to be successfully pumped to the filter device, the water shortage probe triggers a detection signal to stop the pump from working, avoiding invalid working of the pump.

[0108] In implementation, the impeller cover inlet 209 of the impeller cover 206 is directed towards the bottom surface of the pump shell 204. In this way, the highest point and the lowest point of the impeller cover are consistent, the impeller cover inlet is consistent with the liquid level, and the impeller cover inlet can be fully immersed in the liquid to avoid the impeller cover inlet from sucking in air to reduce the pumping effect.

[0109] Further, the distance from the water shortage probe 203 to the bottom surface of the pump shell 204 is greater than the distance from the upper end of the impeller cover outlet 210 to the bottom surface of the pump shell 204, where the upper end of the impeller cover outlet 210 refers to the end of the impeller cover outlet 210 that is farthest from the bottom surface of the pump shell 204, i.e., the height of the water shortage probe 203 relative to the bottom surface of the pump shell 204 is greater than the height of the impeller cover outlet 210 relative to the bottom surface of the pump shell 204. In this way, the impeller cover inlet and outlet pressures are consistent, which is conducive to pumping the liquid in the storage cavity to the filter device.

[0110] In implementation, the bottom surface of the water tank 100 is provided with a mounting groove 501, and the pump 200 is accommodated in the mounting groove 501. The pump inlet 201 is arranged on one side of the pump shell 204, the water shortage probe 203 is arranged on the other side of the pump shell 204 opposite the pump inlet 201, the pump outlet 202 is arranged on the top of the pump shell 204, and the bottom surface of the pump shell 204 is accommodated in the mounting groove 501. The provision of the mounting groove 501 facilitates the installation and positioning of the pump 200 at the bottom of the water tank 100. Arranging the water shortage probe 203 on the side of the pump shell 204 opposite the pump inlet 201 can avoid the influence of liquid level fluctuations at the pump inlet 201 on detection, making the detection result of the water shortage probe 203 more accurate.

[0111] Further, the pump inlet 201 is provided with a first filter structure 211, where the first filter structure 211 can be a grid-shaped structure arranged at the pump inlet 201. In implementation, a grid-shaped structure can be arranged on the side of the pump shell 204 opposite the impeller inlet, so that the pump inlet 201 is combined with the first filter structure 211. The first filter structure 211 is used to block larger impurities such as hair and large particles in the liquid from entering the pump 200, further avoiding the flow of these impurities into the raw water space 303 to weaken the filtering effect of the filter element 302.

[0112] Figure 12 The flow path of the liquid in the pump 200 is shown. Please refer to Figure 12When the liquid level in the water storage cavity 101 is not lower than the water shortage probe 203, the impeller 205 rotates to generate negative pressure inside the pump shell 204, and the liquid in the water storage cavity 101 reaches the vicinity of the impeller cover 206 via the first filter structure 211 of the pump inlet 201, and then enters the inside of the impeller cover 206 via the impeller cover water inlet 209, and the liquid in the impeller cover 206 enters the impeller 205 via the impeller cover water outlet 210 and the impeller water inlet, and the liquid in the impeller 205 is discharged from the pump outlet 202 via the impeller water outlet. When the liquid level in the water storage cavity 101 is lower than the water shortage probe 203, the water shortage probe 203 generates a water shortage signal, and the pump 200 stops working in response to the water shortage signal, and can also perform water shortage reminding, which includes but is not limited to displaying sound and light signals, such as voice reminding or light reminding, to remind the user to supplement water to the water storage cavity 101, and the pump 200 continues to work when the water shortage probe 203 detects that the water storage cavity 101 is not short of water.

[0113] In this embodiment, the pump 200 can be a wired water pump or a wireless water pump. Compared with the wired water pump, the wireless water pump is smaller in size and lower in operation noise, and thus is more suitable than the wired water pump in the case of high silence requirement or limited installation space.

[0114] Further, the pet water dispenser can further include a UV lamp which is not shown in the figure. The UV lamp is installed in the water storage cavity 101, for example, can be arranged on the pump 200 or the water outlet pipe 700, and the UV lamp can be powered and worked from the inside of the pump 200. The UV lamp irradiates the water outlet pipe 700, and can sterilize the liquid passing through the pipe, so as to ensure that the liquid flowing into the filter device 300 is sterilized by the UV lamp. The sterilization of the liquid by the UV lamp can make the liquid store for a longer time and not easy to breed bacteria.

[0115] In the initial stage of working of the pump 200 of the pet water dispenser, the filter device 300 is full of gas, and the pump 200 pumps the liquid in the water storage cavity 101 to the filter device 300. After the gas in the clean water space 304 is completely discharged, the clean water outlet 305 can normally discharge water. If the liquid in the filter device 300 cannot be smoothly discharged, the clean water outlet 305 will not discharge water or the water flow will be small when the water dispenser is started. In this embodiment, the filter device 300 is designed to discharge gas, so that the gas can be quickly discharged when the machine is started, and the water discharge is smooth. For details, see Figure 3 and 6The filter device 300 comprises a housing 301 and a filter core 302 located in the housing 301. The housing 301 is provided with a raw water space 303 and a purified water space 304. The filter core 302 is located between the raw water space 303 and the purified water space 304. The housing 301 is provided with a first air outlet 308 and a purified water outlet 305. The first air outlet 308 is connected to the raw water space 303 and the purified water space 304. The first air outlet 308 is higher than the highest liquid level of the raw water space 303. The purified water outlet 305 is connected to the purified water space 304. When the pump 200 works, the liquid in the water storage cavity 101 enters the raw water space 303. The gas in the raw water space 303 at least partially enters the purified water space 304 through the first air outlet 308. The liquid in the raw water space 303 passes through the filter core 302 and enters the purified water space 304. The gas in the purified water space 304 is discharged from the pet water dispenser through the purified water outlet 305. The liquid in the purified water space 304 is output to the water drinking part 401 through the purified water outlet 305. In this design, the discharge path of the gas in the filter device 300 is consistent with the flow path of the liquid in the filter device 300. The gas in the filter device 300 can be quickly discharged under the continuous injection of the liquid, ensuring smooth water output when the pet water dispenser starts. Further, the housing 301 is provided with a second air outlet 314 connected to the raw water space 303 and the water storage cavity 101. When the pump 200 works, at least part of the gas in the raw water space 303 can be discharged into the water storage cavity 101 through the second air outlet 314. In this way, part of the gas in the raw water space 303 enters the buffer space 307 through the first air outlet 308, and the other part of the gas enters the water storage cavity 101 through the second air outlet 314. In addition, the first air outlet 308 and the second air outlet 314 are arranged near the upper part of the housing 301, which is beneficial to the rapid discharge of the rising gas and the smooth discharge of the gas. Therefore, the gas in the raw water space 303 can be quickly discharged, the liquid can quickly fill the raw water space 303, and the waiting time required from the start of the pump 200 to the water output of the purified water outlet 305 can be shortened. As the water in the raw water space enters the purified water space through the filter core, the water level in the purified water space rises to the buffer space. At this time, the water level in the buffer space is higher than the first air outlet 308, which will make the first air outlet unable to discharge the gas. However, since most of the gas in the machine body has been discharged, the gas in the machine body is much less than when the machine just starts. Therefore, the second air outlet 314 can completely meet the demand for discharging the gas and will not affect the water output speed.

[0116] Figure 6 A structure of the filter device 300 is shown. Please refer to Figure 6The raw water space 303 is arranged outside the purified water space 304 and communicates with the pump outlet 202, the filter core 302 is arranged between the raw water space 303 and the purified water space 304, the purified water space 304 communicates with the buffer space 307 through the filter core water outlet 315, the buffer space 307 communicates with the purified water outlet 305, and the filter core water outlet 315 is staggered with the purified water outlet 305. When the pump 200 works, the liquid in the water storage cavity 101 is delivered from bottom to top to the raw water space 303, the gas in the raw water space 303 is discharged through the first exhaust hole 308 and the second exhaust hole 314, the liquid in the raw water space 303 passes through the filter core 302 horizontally to enter the purified water space 304, the gas in the purified water space 304 enters the buffer space 307 through the filter core water outlet 315, the gas in the buffer space is discharged through the purified water outlet 305, the liquid in the purified water space 304 enters the buffer space 307 from bottom to top through the filter core water outlet 315, and the liquid in the buffer space 307 is delivered to the drinking water part 401 through the purified water outlet 305. The filter core 302 is a polypropylene activated carbon filter core, and the hydrogen ion exchange resin member and the potassium ion exchange resin member are arranged in the raw water space 303. The filter core 302 is a polypropylene activated carbon filter core, which can filter large-particle impurities, the hydrogen ion exchange resin member and the potassium ion exchange resin member are arranged in the raw water space 303 to form weakly acidic soft water, the polypropylene activated carbon filter core can add trace elements required by pets, enhance the taste and help the health of pets. Further, a descaling filter element can be arranged in the raw water space 303 to remove calcium and magnesium ions in the liquid in the raw water space 303. Optionally, the descaling filter element can be directly arranged in the raw water space 303 for convenient replacement. In the embodiment, since the liquid from the water storage cavity 101 flows in the filter element 300 by horizontal flow and from bottom to top, the liquid flow rate is relatively slow, so that the liquid can fully contact the filter core 302 and other filter materials to achieve a better filtering effect. In addition, by staggering the filter core water outlet 315 and the purified water outlet 305, the liquid overflowing from the filter core water outlet 315 is buffered at the top of the shell 301 during the liquid flowing from bottom to top, and then naturally overflows from the purified water outlet 305, avoiding the liquid spouting from the purified water outlet 305.

[0117] See Figures 6-9The shell 301 comprises an upper end cover 309 at the top and a lower end cover 310 at the bottom, the purified water outlet 305 is arranged on the upper end cover 309, and a connecting pipe 316 is arranged around the purified water outlet 305 on the upper end cover 309; the filter element 302 comprises a filter element body 312 and a filter element end cover 313 connected to the upper portion of the filter element body 312, the lower end of the filter element body 312 is arranged on the lower end cover 310, the filter element end cover 313 is connected to the connecting pipe 316, the inside of the filter element 302 is the purified water space 304, the inside of the connecting pipe 316 is the buffer space 307, the filter element end cover 313 is provided with a filter element water outlet 315 which communicates the purified water space 304 and the buffer space 307, and the water outlet direction of the filter element water outlet 315 deviates from the purified water outlet 305. Optionally, the filter element end cover 313 is provided with a ring body 317 around the filter element water outlet 315, the ring body 317 is sealed and matched with the connecting pipe 316 by a sealing element 329 to form the buffer space 307, wherein the sealing element 329 is a sealing ring arranged between the ring body 317 and the connecting pipe 316. Further, the shell 301 further comprises a middle shell 311 connecting the upper end cover 309 and the lower end cover 310, optionally, the upper portion of the middle shell 311 can be integrated with the upper end cover 309, and the lower portion of the middle shell 311 can be integrated with the lower end cover 310, so as to reduce assembly parts and improve assembly efficiency.

[0118] Specifically, the upper portion of the shell 301 is provided with a first air vent 308, the first air vent 308 communicates the raw water space 303 and the buffer space 307, and the first air vent 308 is higher than the highest liquid level of the raw water space 303. At the initial stage of the pump 200 working, at least part of the air in the raw water space 303 can enter the buffer space 307 through the first air vent 308 and be discharged from the purified water outlet 305. In specific implementation, a communication part can be arranged on the connecting pipe 316, after the connecting pipe 316 is tightly combined with the ring body 317, the part of the communication part which communicates the buffer space 307 and the raw water space 303 constitutes the first air vent 308. The communication part can be a hole or a notch arranged on the connecting pipe 316, for example, as shown in the figure, the communication part is a notch arranged on the connecting pipe 316. Figure 7 Further, since the first air vent 308 is higher than the highest liquid level of the raw water space 303, when the purified water space 304 is full of liquid, the liquid can enter the raw water space 303 from the first air vent 308, in order to take into account the air exhaust function of the first air vent 308 and reduce the liquid flowing back to the raw water space 303 through the first air vent 308, the opening area of the first air vent 308 in the embodiment is 10mm 2 ~14mm 2 .

[0119] The lower end cover 310 is provided with a water inlet 319, an exhaust port 320, a water outlet column 321 and an exhaust column 322. The water inlet 319 and the exhaust port 320 penetrate the upper surface and the lower surface of the lower end cover 310. The water outlet column 321 and the exhaust column 322 are vertically arranged in the raw water space 303. The lower end of the water outlet column 321 is open and communicates with the water inlet 319. The upper end of the water outlet column 321 is open and forms a filter core water inlet 330. The lower end of the exhaust column 322 communicates with the exhaust port 320. The upper end of the exhaust column 322 is open and forms a second exhaust hole 314. The second exhaust hole 314 is higher than the filter core water inlet 330. The second exhaust hole 314 is flush with the highest liquid level of the raw water space 303. When the pump 200 is working, at least part of the air in the raw water space 303 can enter the water storage cavity 101 through the second exhaust hole 314. When the liquid level in the raw water space 303 exceeds the highest liquid level of the raw water space 303, the liquid in the raw water space 303 can be discharged into the water storage cavity 101 through the second exhaust hole 314. The upper end faces of the water outlet column 321, the exhaust column 322 and the positioning column 323 are all higher than the filter core end cover 313. In this way, the highest liquid level of the raw water space 303 is higher than the upper cover of the filter core 302. The filter core 302 is entirely soaked in the liquid, which increases the effective contact area of the filter core 302 with the liquid, thereby facilitating the improvement of the filtering effect of the filter core 302.

[0120] The lower end cover 310 is further provided with a positioning column 323. The positioning column 323 is located in the raw water space 303. The edge of the filter core end cover 313 is provided with a first positioning hole 324 and a second positioning hole 325. The lower end of the positioning column 323 is connected to the lower end cover 310. The upper end of the positioning column 323 passes through the first positioning hole 324 and cooperates with a positioning portion 326 of the upper end cover 309. The exhaust column 322 passes through the second positioning hole 325. The second exhaust hole 314 of the exhaust column 322 and the upper end cover 309 have a gap 327. The gas and the liquid in the raw water space 303 can enter the exhaust column 322 through the gap 327. When the liquid level in the raw water space 303 is higher than the second exhaust hole 314, the liquid will be discharged from the second exhaust hole 314. Thus, the second exhaust hole 314 defines the highest liquid level of the raw water space 303. Optionally, the first positioning hole 324 and the second positioning hole 325 are different in size and / or shape. The size and the shape of the first positioning hole and the second positioning hole are designed to be different, which facilitates the quick alignment during the assembly of the filter device, improves the assembly efficiency and reduces the error rate.

[0121] Further, the lower part of the filter device 300 is accommodated in the mounting groove 501 of the primary filter device 500, the water inlet 319 of the lower end cover 310 is opposite to the through hole 502 in the mounting groove 501, the air outlet 320 of the lower end cover 310 is exposed from the through hole 502, and the air outlet 320 is configured to face the water inlet 319. The inlet of the water outlet pipe 700 is fixedly connected with the pump outlet 202, and the outlet of the water outlet pipe 700 enters the through hole 502 in the mounting groove 501 and is in clearance fit with the water inlet 319. When the liquid level in the raw water space 303 exceeds the highest liquid storage surface of the raw water space 303, the liquid in the raw water space 303 can reach the air outlet 320 through the second air vent hole 314 and flow back to the water storage cavity 101 along the water outlet pipe 700. In a specific implementation, in order to ensure that the liquid flowing out of the air outlet 320 can flow along the water outlet pipe 700, the opening area of the air outlet 320 is set to 2mm 2 -5mm 2 , so that a water column is formed when the liquid flows out of the air outlet 320 and sprays towards the water outlet pipe 700. The liquid in the filter device 300 flows back to the water storage cavity 101 along the water outlet pipe 700, which is beneficial to reducing water flow noise.

[0122] The top of the upper end cover 309 has a flow guide surface 328 extending from the clean water outlet 305 to the drinking water part 401, and the flow guide surface 328 is used to guide the liquid overflowing from the clean water outlet 305 to converge towards the drinking water part 401. The flow guide surface 328 is configured as a recess extending from the vicinity of the clean water outlet 305 to at least part of the edge of the upper end cover 309, and the recess structure has a certain water storage volume. The liquid flowing out of the clean water outlet 305 flows slowly after being buffered by the recess structure, and a water flow effect of slowly flowing from top to bottom can be formed, which attracts pets to drink water while the water flow sound is small.

[0123] The drinking water disc 400, the filter device 300, the primary filter device 500 and the pump 200 of the pet water dispenser of the embodiment can be detached from the water tank 100, which facilitates cleaning of the inside of the water tank 100. In addition, the upper cover part and the lower cover part of the filter device 300 can be separated, which facilitates adding or reducing filter materials, such as descaling filter elements, to the raw water space 303.

[0124] The liquid flow path of the pet water dispenser provided in the embodiment is as shown in Figure 13 , please refer to Figure 13, the liquid in the water storage cavity 101 is stored, the operation control button makes the pump 200 work, the liquid in the liquid storage tank passes through the pump 200, the water outlet pipe 700 and the water outlet column 321 into the raw water space 303 in turn, the liquid in the raw water space 303 passes through the filter core 302 into the clean water space 304 in the filter core 302, when the liquid in the clean water space 304 is full, it continues to pass through the filter outlet 315 into the buffer space 307, when the liquid in the buffer space 307 is full, it flows out from the clean water outlet 305, flows along the guide surface 328 on the top of the upper end cover 309 to the drinking water part 401 of the water tray 400, when the liquid level of the drinking water part 401 is higher than the backwater hole 402, the excess liquid will flow down to the filter part of the primary filter 500 along the backwater hole 402, the liquid in the filter part first contacts the buffer area 504, reduces the potential energy, and then flows along the guide groove 506 to the backflow port 505, and then flows into the water storage cavity 101 after being filtered by the filter screen of the backflow port 505. At the same time, when the liquid level in the raw water space 303 is higher than the upper end surface of the exhaust column 322, i.e. the second exhaust hole 314, the liquid will enter the exhaust column 322 and flow along the exhaust column 322 to the exhaust port 320. Because the exhaust port 320 has a small diameter and is easy to form a water column, and the exhaust port 320 is close to the water outlet pipe 700, the liquid flowing out of the exhaust port 320 will slowly flow down along the water outlet pipe 700 into the water storage cavity 101, which helps to reduce the water flow noise. And in the process of circulating along the path shown in the figure, the liquid is filtered by the second filter structure of the primary filter screen, the first filter structure 211 of the pump inlet 201 and the filter core 302 of the filter device 300, so as to ensure that the liquid delivered to the drinking water part 401 is clean drinking water after multiple filtering treatment. Figure 13

[0125] Please refer to Figure 14 ​When the filter device 300 does not store liquid, there is gas in the raw water space 303 and the clean water space 304. When the pump 200 works, liquid is pumped from the water storage cavity 101 to the raw water space 303 outside the filter core 302. Part of the gas in the raw water space 303 enters the clean water space 304 through the first exhaust hole 308, and the other part enters the exhaust column 322 and then enters the water storage cavity 101 through the exhaust port 320. The gas in the raw water space 303 is quickly exhausted through the multi-path exhaust, so that the liquid quickly fills the raw water space 303, and then enters the clean water space 304 after being filtered by the filter core 302. The gas in the clean water space 304 is upwardly exhausted into the buffer space 307 through the filter core water outlet 315, and the gas in the buffer space 307 is upwardly exhausted through the clean water outlet 305. The exhaust path of the gas in the clean water space 304 is consistent with the flow path of the liquid, and the exhaust path of the gas is from bottom to top, which is consistent with the characteristics of the upward movement of the gas. Therefore, the gas in the clean water space 304 can be quickly exhausted, so that the liquid can quickly fill the clean water space 304, and then the water outlet of the clean water outlet 305 can smoothly flow, avoiding the situation that no water or small water flow occurs in the initial stage of the pump 200 working.

[0126] It should be noted that the above are only the preferred embodiments of the present application and the principles of the technology applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A pet water fountain, characterized by, The pet water dispenser comprises: a water tank (100) having a water storage cavity (101); a filter device (300) comprising a housing (301), a raw water space (303), a purified water space (304), and a filter core (302), the filter core (302) being between the raw water space (303) and the purified water space (304); a purified water outlet (305) communicating with the purified water space (304); a pump (200) comprising a pump inlet (201) and a pump outlet (202), the pump inlet (201) communicating with the water storage cavity (101), the pump outlet (202) communicating with the raw water space (303), the pump (200) being used to send the liquid in the water storage cavity (101) from the pump inlet (201) to the pump outlet (202); the purified water outlet (305) being higher than the pump inlet (201); a drinking water part (401) for containing liquid for drinking; a first air vent (308) communicating with the raw water space (303), the raw water space (303) communicating with the atmosphere outside the body of the pet water dispenser via the first air vent (308), and the first air vent (308) being higher than the highest liquid storage level of the raw water space (303); wherein, when the pump (200) is working, the liquid in the water storage cavity (101) enters the raw water space (303), the gas in the raw water space (303) is at least partially discharged to the outside of the body via the first air vent (308), the liquid in the raw water space (303) passes through the filter core (302) to enter the purified water space (304), the gas in the purified water space (304) is discharged from the pet water dispenser via the purified water outlet (305), and the liquid in the purified water space (304) is output to the drinking water part (401) via the purified water outlet (305); the pet water dispenser further comprises a buffer space (307) communicating with the purified water space (304) and the purified water outlet (305), the buffer space (307) being used to buffer the liquid flowing out of the purified water space (304) to avoid the liquid being directly sprayed out of the purified water outlet (305); the liquid in the purified water space (304) first flows into the buffer space (307) and then flows from the buffer space (307) to the purified water outlet (305).

2. The pet water fountain of claim 1, wherein The first air vent (308) communicates with the buffer space (307), and the first air vent (308) communicates the raw water space (303) with the purified water outlet (305); when the raw water space (303) inputs liquid, the gas in the raw water space (303) is discharged from the purified water outlet (305) via the first air vent (308) and the buffer space (307).

3. The pet water fountain of claim 1, wherein, The buffer space (307) is located above the purified water space (304).

4. The pet water fountain of claim 2, wherein, The shell (301) is internally provided with the raw water space (303), the purified water space (304) and the filter core (302), the shell (301) comprises an upper end cover (309) located at the top and a lower end cover (310) located at the bottom, the purified water outlet (305) is arranged on the upper end cover (309), and a connecting pipe (316) is arranged around the purified water outlet (305) on the upper end cover (309), and the connecting pipe (316) is internally provided with the buffer space (307).

5. The pet water fountain of claim 4, wherein, The first exhaust hole (308) is arranged on the connecting pipe (316).

6. The pet water fountain of claim 4, wherein, The shell (301) is provided with a filter core water outlet (315), the purified water space (304) and the buffer space (307) are communicated through the filter core water outlet (315), and the filter core water outlet (315) is arranged in a staggered mode with the purified water outlet (305).

7. The pet water fountain of claim 6, wherein, The filter core (302) comprises a filter core body (312) and a filter core end cover (313) connected to the upper portion of the filter core body (312), the lower end of the filter core body (312) is arranged on the lower end cover (310), the filter core end cover (313) is connected with the connecting pipe (316), The filter core (302) is internally provided with the purified water space (304), the filter core end cover (313) is provided with the filter core water outlet (315) for communicating the purified water space (304) and the buffer space (307), and the water outlet direction of the filter core water outlet (315) deviates from the purified water outlet (305).

8. The pet water fountain of claim 7, wherein, The buffer space (307) is jointly formed by the connecting pipe (316) and the filter core end cover (313).

9. The pet water fountain of claim 1, wherein, The purified water outlet (305) is located above the raw water space (303).

10. The pet water fountain of claim 1, wherein, The normal projection of the buffer space (307) and the purified water space (304) on the plane where the bottom surface of the filter device (300) is located corresponds to the second projection and the first projection, the second projection and the first projection are overlapped, and the second projection is smaller than the first projection.

11. The pet drinking fountain of claim 7, wherein, The shell (301) is provided with a second exhaust hole (314), the second exhaust hole (314) communicates the raw water space (303) and the water storage cavity (101), and at least part of the gas in the raw water space (303) is discharged into the water storage cavity (101) through the second exhaust hole (314) when the pump (200) works.

12. The pet drinking fountain of claim 11, wherein, The raw water space (303) is arranged outside the purified water space (304), the purified water space (304) and the buffer space (307) are communicated through the filter core water outlet (315), the buffer space (307) and the purified water outlet (305) are communicated, and the filter core water outlet (315) is arranged in a staggered mode with the purified water outlet (305); When the pump (200) works, the liquid in the water storage cavity (101) is delivered from bottom to top to the raw water space (303), the gas in the raw water space (303) is discharged through the first exhaust hole (308) and the second exhaust hole (314), the liquid in the raw water space (303) passes through the filter core (302) into the clean water space (304) laterally, the gas in the clean water space (304) enters the buffer space (307) through the filter core water outlet (315), the gas in the buffer space is discharged through the clean water outlet (305), and the liquid in the clean water space (304) enters the buffer space (307) through the filter core water outlet (315) from bottom to top, and the liquid in the buffer space (307) is delivered to the drinking water part (401) through the clean water outlet (305).

13. The pet drinking fountain of claim 7, wherein, The ring body (317) is in sealing fit with the connector (316) through a sealing element (329).

14. The pet drinking fountain of claim 13, wherein, The connector (316) is tightly combined with the ring body (317), and the part of the communication part that communicates the buffer space (307) and the raw water space (303) constitutes the first exhaust hole (308).

15. The pet drinking fountain of claim 14, wherein, The communication part is a hole or a notch provided on the connector (316).

16. The pet drinking fountain according to claim 1, wherein The upper part of the shell (301) is provided with the first exhaust hole (308), and the first exhaust hole (308) communicates the raw water space (303) and the buffer space (307).

17. The pet drinking fountain according to claim 1, wherein The first exhaust hole (308) has an opening area of 10mm 2 14mm 2 .

18. The pet drinking fountain of claim 11, wherein, The second exhaust hole (314) is flush with the highest liquid storage surface of the raw water space (303), and when the liquid level of the liquid in the raw water space (303) exceeds the highest liquid storage surface of the raw water space (303), the liquid in the raw water space (303) can be discharged into the water storage cavity (101) through the second exhaust hole (314).

19. The pet drinking fountain according to claim 18, wherein, The lower end cover (310) is provided with a water inlet (319), an exhaust port (320), a water outlet column (321) and an exhaust column (322), the water inlet (319) and the exhaust port (320) penetrate the upper surface and the lower surface of the lower end cover (310), the water outlet column (321) and the exhaust column (322) are vertically arranged in the raw water space (303), the lower end of the water outlet column (321) is open and communicates with the water inlet (319), the upper end of the water outlet column (321) is open and forms a filter core water inlet (330), the lower end of the exhaust column (322) is open and communicates with the exhaust port (320), the upper end of the exhaust column (322) is open and forms the second exhaust hole (314), and the second exhaust hole (314) is higher than the filter core water inlet (330).

20. The pet drinking fountain according to claim 19, wherein, The pump outlet (202) is communicated with the water inlet (319) through a water outlet pipe (700), and the exhaust port (320) is configured to be directed towards the water inlet (319), When the liquid level in the raw water space (303) exceeds the highest liquid storage level of the raw water space (303), the liquid in the raw water space (303) can reach the exhaust port (320) through the second exhaust hole (314) and backflow to the water storage cavity (101) along the water outlet pipe (700).

21. The pet drinking fountain of claim 19, wherein, The opening area of the exhaust port (320) is 2mm 2 -5mm 2 .

22. The pet drinking fountain of claim 19, wherein, The lower end cover (310) is further provided with a positioning column (323) located in the raw water space (303), and the edge of the filter core end cover (313) is provided with a first positioning hole (324) and a second positioning hole (325), The lower end of the positioning column (323) is connected to the lower end cover (310), the upper end of the positioning column (323) is matched with the positioning part (326) of the upper end cover (309) after passing through the first positioning hole (324), and the exhaust column (322) passes through the second positioning hole (325), and the second exhaust hole (314) of the exhaust column (322) has a gap (327) with the upper end cover (309).

23. The pet drinking fountain of claim 22, wherein, The first positioning hole (324) and the second positioning hole (325) are different in size and / or shape.

24. The pet drinking fountain of claim 20, wherein, The top of the upper end cover (309) has a flow guide surface (328) extending from the purified water outlet (305) to the drinking water part (401), and the flow guide surface (328) is arranged as a recess extending from the vicinity of the purified water outlet (305) to at least part of the edge of the upper end cover (309).

25. The pet drinking fountain of claim 24, wherein, A drinking water disc (400) is arranged at the open upper end of the water tank (100), and at least part of the drinking water disc (400) constitutes the drinking water part (401).

26. The pet drinking fountain of claim 25, wherein, The drinking water disc (400) has a recessed purified water holding part constituting the drinking water part (401) and a backflow hole (402) arranged beside the purified water holding part, and the backflow hole (402) communicates with the water storage cavity (101), and the liquid exceeding the highest liquid storage level of the drinking water part (401) can backflow to the water storage cavity (101) through the backflow hole (402).

27. The pet drinking fountain of claim 26 wherein, The depth of the drinking water part (401) is not less than 20 mm, and the depth refers to the vertical distance between the backflow hole (402) and the bottom surface of the drinking water part (401).

28. The pet drinking fountain of claim 27 wherein, The upper part of the water tank (100) is further provided with a primary filter (500) having a filter part (503) for filtering the liquid backflowing from the drinking water part (401) to the water storage cavity (101).

29. The pet drinking fountain of claim 28 wherein, The filter part (503) is below the drinking water part (401), and the filter part (503) includes a backflow port (505) provided with a second filter structure.

30. The pet drinking fountain of claim 29 wherein, The filter part (503) further comprises a buffer area (504) and a flow guide groove (506) surrounding the buffer area (504), the flow guide groove (506) being in fluid communication with the backflow port (505); the buffer area (504) is arranged to protrude towards the water drinking part (401), and the liquid flowing out of the water outlet hole (402) is shunted and collected to the flow guide groove (506) through the buffer area (504), and then flows into the water storage cavity (101) through the backflow port (505) along the flow guide groove (506).

31. The pet drinking fountain according to claim 28, wherein, The primary filter (500) has a receiving part (507), the water drinking disc (400) is provided with a mounting hole (403), the lower part of the filter device (300) is arranged on the receiving part (507), the upper part of the filter device (300) passes through the mounting hole (403), and the clean water outlet (305) is higher than the water drinking part (401).

32. The pet drinking fountain according to claim 31, wherein, The distance between the mounting hole (403) and the bottom surface of the water drinking part (401) is greater than the distance between the water outlet hole (402) and the bottom surface of the water drinking part (401).

33. The pet drinking fountain according to claim 31, wherein, The receiving part (507) comprises a mounting groove (501) and a through hole (502) arranged in the mounting groove (501), the water inlet (319) of the lower end cover (310) is opposite to the through hole (502), the pump outlet (202) is in communication with the inlet of the water outlet pipe (700), the outlet of the water outlet pipe (700) passes through the through hole (502) and is connected with the water inlet (319), and the air outlet (320) of the lower end cover (310) is exposed from the through hole (502).

34. The pet drinking fountain according to claim 1, wherein, The pump (200) is arranged at the bottom of the water tank (100) and comprises: a pump shell (204), the pump inlet (201) and the pump outlet (202) being arranged on the shell (301), and the bottom surface of the pump shell (204) being in contact with the bottom surface of the water tank (100); an impeller (205) comprising an impeller water inlet and an impeller water outlet, the impeller water inlet being in communication with the pump inlet (201), and the impeller water outlet being in communication with the pump outlet (202); an impeller cover (206) located between the pump inlet (201) and the impeller water inlet, comprising an impeller cover water inlet (209) and an impeller cover water outlet (210), the impeller cover water outlet (210) being in communication with the impeller water inlet, and the distance from the impeller cover water inlet (209) to the bottom surface of the pump shell (204) being less than the distance from the impeller cover water outlet (210) to the bottom surface of the pump shell (204); a water shortage probe (203) connected to the pump shell (204), the distance from the upper end of the impeller cover water inlet (209) to the bottom surface of the pump shell (204) being greater than the distance from the water shortage probe (203) to the bottom surface of the pump shell (204), wherein the upper end of the impeller cover water inlet (209) refers to the end farthest from the bottom surface of the pump shell (204).

35. The pet drinking fountain of claim 34 wherein, The pump inlet (201) is arranged on one side of the pump shell (204), the water shortage probe (203) is arranged on the other side of the pump shell (204) opposite to the pump inlet (201), and the pump outlet (202) is arranged on the top of the pump shell (204).

36. The pet drinking fountain of claim 35 wherein, The impeller cover water inlet (209) faces the bottom surface of the pump shell (204).

37. The pet drinking fountain of claim 36 wherein, The distance from the water shortage probe (203) to the bottom surface of the pump shell (204) is greater than the distance from the upper end of the impeller cover water outlet (210) to the bottom surface of the pump shell (204), wherein the upper end of the impeller cover water outlet (210) refers to the end farthest from the bottom surface of the pump shell (204).

38. The pet drinking fountain according to claim 1, wherein, The upper end of the water tank (100) is provided with a water drinking plate (400), and the water drinking plate (400) is detachably arranged; The upper part of the water tank (100) is provided with a primary filter (500), and the primary filter (500) is detachably arranged; The filter (300) is detachably arranged; The pump inlet (201) and the pump outlet (202) are located on different surfaces of the pump (200), and the pump outlet (202) is higher than the pump inlet (201). The pump inlet (201) is provided with a first filter structure (211).

39. The pet drinking fountain according to claim 1, wherein, The pump (200) is a wireless water pump.

40. The pet drinking fountain according to claim 1, wherein, The filter core (302) is a polypropylene activated carbon filter core, and the raw water space (303) is provided with a hydrogen ion exchange resin member and a potassium ion exchange resin member.

41. The pet drinking fountain according to claim 1, wherein, The pet water dispenser further comprises a UV lamp installed in the water storage cavity (101) for sterilizing the liquid in the water storage cavity (101).

42. The pet drinking fountain according to claim 1, wherein, The pet water dispenser further comprises a descaling filter, which is placed in the raw water space (303) and used for removing calcium and magnesium ions in the liquid in the raw water space (303).

43. The pet drinking fountain according to claim 25, wherein, The water drinking plate (400) is made of stainless steel.

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