Filtering device and pet water dispenser

Abstract

The utility model relates to the technical field of pet water dispensers, in particular to a filtering device and a pet water dispenser, the pet water dispenser comprises the filtering device, a water tank, a one-way water replenishing valve and a top cover, the filtering device comprises a first filtering module and a second filtering module, and a two-stage filtering structure is adopted. The water quality can be improved; the service life of the filter element is prolonged; the first filter module adopts a vertical filter element, and the water flow is easier to pass through the vertical filter element by utilizing the height gravity difference after the vertical filter element absorbs water, so that the filter effect is improved; the folding design is adopted, the effective surface area of the vertical filter element is increased by 5-15 times compared with that of a plane filter element, and the service life is prolonged; the second filtering module adopts the design of a composite filter element, harmful substances are filtered, meanwhile, water quality and taste are improved, elements beneficial to pets are added, the water intake of the pets is increased, and the physique of the pets is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pet water dispenser technical field, especially in a kind of filter device and pet water dispenser. BACKGROUND

[0002] Pet water dispenser usually includes shell, water tank arranged in shell, water pump arranged in water tank and top cover arranged above water tank, and most of this kind of pet water dispenser adopts circulating form to supply water. After water is supplied to the drinking water area of top cover by water pump, it is backflowed to water tank through backflow opening of top cover and filtered.

[0003] Conventional filter structure usually adopts flat filter core material, such as a kind of pet water dispenser filter disclosed by Chinese patent publication No. CN220684757U, which includes upper cover, lower cover and filter core assembly arranged between upper cover and lower cover, and core assembly includes filter core outer surface layer and medical stone, activated carbon and bacteriostatic ball arranged in filter core outer surface layer, and upper cover and lower cover are respectively provided with water leakage area, and by making backflowing water pass through filter core outer surface layer, medical stone, activated carbon and bacteriostatic ball, filter core outer surface layer can preliminarily adsorb large particles, medical stone has large specific surface area, not only has strong adsorption effect on bacteria and heavy metals, but also can release trace elements beneficial to pets, activated carbon can adsorb odor, keep water quality fresh, bacteriostatic ball can inhibit bacteria in water, keep water quality healthy, and through mutual promotion of filter core outer surface layer, medical stone, activated carbon and bacteriostatic ball, bacteria, microorganisms and fine impurities can be effectively filtered.

[0004] The above-mentioned pet water dispenser filter adopts plane filter core structure, and plane filter core surface area is small, and a layer of bacterial film is easily formed on surface, which is easy to block and has short service life, and plane filter core structure has no pressure difference, and water flow is difficult to pass through filter core.

[0005] Therefore, the prior art still needs to be improved and developed. UTILITY MODEL CONTENT

[0006] In view of the above-mentioned deficiencies of prior art, the purpose of the utility model is to provide a kind of filter device and pet water dispenser to solve the above-mentioned problems.

[0007] A kind of filter device, including first filter module, the first filter module includes carrier, vertical filter core in the carrier is arranged in annular form;

[0008] The lower side of the carrier is provided with circulating water cavity, and the inner side of the vertical filter core forms backflow water cavity;

[0009] The water in the backflow water cavity passes through the vertical filter core along the circumference of the carrier, and then flows into the circulating water cavity.

[0010] Specifically, the vertical filter core is in a folded or honeycomb structure.

[0011] Specifically, the filter device further comprises a second filter module, the second filter module comprising a shell, a composite filter core arranged in the shell;

[0012] The lower end of the shell is in communication with the circulating water cavity through a water pump, and the upper end penetrates through the backflow water cavity;

[0013] The water pump draws water in the circulating water cavity into the shell, and the water is discharged upward after being filtered by the composite filter core.

[0014] Specifically, the composite filter core comprises a bacteriostatic layer, a carbon particle adsorption layer, a chlorine removal layer, a stone layer rich in elements beneficial to pets, and a probiotic additive layer.

[0015] Specifically, the elements in the stone layer rich in elements beneficial to pets are selected from at least one of selenium and strontium.

[0016] Specifically, the upper end of the shell is connected with a water outlet structure, the water outlet structure comprising a supporting plate fixed to the upper end of the shell, a surrounding plate arranged around the supporting plate, and an inner cover detachably mounted on the inner side of the middle part of the supporting plate.

[0017] The inner side of the surrounding plate forms a first water groove, the surrounding plate is provided with a plurality of side water discharge holes distributed in the circumferential direction, and the inner cover is provided with a gushing type spray hole communicating the inner cavity of the shell with the first water groove.

[0018] Specifically, a rotatable dial type turntable is arranged on the inner cover, a plurality of first text marks are arranged on the upper surface of the inner cover in the circumferential direction, and a viewing hole corresponding to the positions of any two first text marks is arranged on the dial type turntable.

[0019] Specifically, the carrier comprises a lower cylinder, an upper cover detachably fixed to the upper end of the lower cylinder, a connecting head penetrating through the upper and lower cylinders is connected to the lower end of the lower cylinder, the water discharge end of the water pump is connected to the connecting head pipeline, a plurality of clamping grooves are arranged on the upper end edge of the lower cylinder in the circumferential direction, and a second text mark is arranged between adjacent two clamping grooves.

[0020] Specifically, a through hole penetrating through the upper and lower parts of the upper cover is arranged in the middle part of the upper cover, and a plurality of clamping blocks for clamping the shell are arranged on the inner wall of the through hole in the circumferential direction.

[0021] The bottom of the shell is inserted and matched with the carrier.

[0022] A pet water dispenser comprises:

[0023] The filter device;

[0024] A water tank, a circulating water cavity is arranged in the water tank, and a clean water cavity is arranged in the water tank and is independent of the circulating water cavity;

[0025] A one-way water replenishment valve is arranged at the bottom side of the circulating water cavity, and is used for limiting water to flow from the clean water cavity to the circulating water cavity in one direction;

[0026] A top cover is arranged at the upper end of the water tank, a second water tank for containing water is arranged on the top cover, and a backflow port penetrating upward and downward is arranged on the top cover, and the backflow water cavity is located below the backflow port.

[0027] The utility model discloses the beneficial effects of:

[0028] 1. The utility model discloses a filtering device and pet water dispenser, adopt two -stage filtration structure, can realize efficient filtration, improve water quality and prolong filter core life -span;

[0029] 2. The first filtering module adopts vertical filter core, utilizes the height gravity difference after vertical filter core water absorption, and water flow is more easily passed through vertical filter core, improves the filtering effect, adopts the design of folding, and the effective surface area of vertical filter core is increased by 5-15 times compared with plane filter core, and the service life is prolonged.

[0030] 3. The composite filter core of the second filtering module includes, from bottom to top, a bacteriostatic layer, a carbon particle adsorption layer, a chlorine removal layer, a stone layer rich in elements beneficial to pets and a probiotic additive layer. During secondary filtration, circulating water first passes through the bacteriostatic layer to remove bacteria, then passes through the carbon particle adsorption layer to adsorb, then passes through the chlorine removal layer to remove chlorine ions in the water, then passes through the stone layer to release elements beneficial to pets into the circulating water, and finally passes through the probiotic additive layer to release probiotics into the circulating water. Through various composite structures, harmful substances are filtered, water quality and taste are improved, elements beneficial to pets are added, pet water consumption is increased, and pet physical condition is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a perspective view of the filtering device of the embodiment 1 of the utility model;

[0032] Figure 2 It is a three-dimensional sectional view of the filtering device and the water pump of the embodiment 1 of the utility model;

[0033] Figure 3 It is an explosion view of the filtering device of the embodiment 1 of the utility model;

[0034] Figure 4 It is a structure schematic view of the second filtering module of the embodiment 1 of the utility model after the dial type turntable is disassembled;

[0035] Figure 5 It is a perspective view of the pet water dispenser of the embodiment 2 of the utility model;

[0036] Figure 6It is a three-dimensional sectional view of the pet water dispenser of the embodiment 2 of the application;

[0037] Figure 7 It is an explosion view of the lower cylinder and the inner water tank of the embodiment 2 of the application;

[0038] Figure 8 It is a sectional view of the water tank and the duckbill silica gel valve of the embodiment 3 of the application.

[0039] The reference signs are: a first filter module 10, a carrier 11, a lower cylinder 111, a connecting head 1111, a through hole 1112, a clamping groove 1113, an upper cover 112, a perforation 1121, a clamping block 1122, a vertical filter element 12, a backflow water cavity 121, a second filter module 20, a shell 21, a composite filter element 22, a bacterium inhibition layer 221, a carbon particle adsorption layer 222, a chlorine removal layer 223, a stone layer rich in elements beneficial to pets 224, a probiotic additive layer 225, a water pump 30, a water outlet structure 40, a supporting plate 41, a surrounding plate 42, a first water tank 421, a side water outlet hole 422, an inner cover 43, a gushing spring type spray hole 431, a first character mark 432, a watch dial type rotating disc 44, an observation hole 441, a duckbill silica gel valve 51, a spherical valve 52, a top cover 60, a second water tank 61, a backflow port 62, an outer water tank 70, a purified water cavity 71, an inner water tank 80, a circulating water cavity 81, a channel 82, a water inlet 83, a protrusion 84. DETAILED DESCRIPTION

[0040] The utility model provides a kind of filtering device and pet water dispenser, to make the purpose, technical scheme and effect of the utility model more clear, definite, the following referring to drawing and taking example to the utility model is further detailedly explained.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0041] In the description of the utility model, it needs to be understood that, when involving orientation description, such as the orientation or position relationship of the indication of upper, lower, front, rear, left, right etc.

[0042] Embodiment 1

[0043] Please refer to Figures 1 to 4 The embodiment discloses a kind of filtering device, including first filter module 10 and second filter module 20, adopt double-stage filtration structure, can realize efficient filtration, improve water quality and prolong filter element life.

[0044] Wherein, please refer to Figure 1The first filter module 10 of the embodiment comprises a carrier 11, a vertical filter core 12 arranged in the carrier 11 in a ring-shaped folded manner; the vertical filter core 12 can adopt a composite structure of PP cotton and carbon fiber, double-layer material combination filtering is adopted to improve the filtering effect; moreover, the vertical design can increase the height difference of the vertical filter core 12, so that the vertical filter core 12 can increase the gravity of water after absorbing water, so that the vertical filter core 12 has a pressure difference between upper and lower parts, water flow is more easily passed through the vertical filter core 12, and the filtering effect is improved; the folded or honeycomb-shaped design is adopted, the effective surface area of the vertical filter core 12 is increased by 5-15 times compared with a planar filter core, and the service life is prolonged to 3 months.

[0045] Please refer to Figure 2 The lower side of the carrier 11 is provided with a circulating water cavity 81, and the inner side of the vertical filter core 12 is formed with a backflow water cavity 121; the water in the backflow water cavity 121 passes through the vertical filter core 12 along the circumference of the carrier 11, and then flows into the circulating water cavity 81, so that the first filtration is realized, the animal hair, saliva, food residue, dust and soil impurities in the backflow water are blocked, and the impurities are prevented from flowing back to the circulating water cavity 81, so that the water quality in the circulating water cavity 81 is ensured to be relatively clean.

[0046] Please refer to Figure 2 and Figure 3 The second filter module 20 of the embodiment comprises a shell 21 and a composite filter core 22 arranged in the shell 21; the lower end of the shell 21 is communicated with the circulating water cavity 81 through a water pump 30, and the upper end penetrates through the backflow water cavity 121; the water pump 30 pumps the water in the circulating water cavity 81 into the shell 21, and the water is discharged upward after being filtered by the composite filter core 22, so that the second filtration is realized, the water quality is improved, and moreover, most of the impurities are blocked after the first filtration, so that the service life of the composite filter core 22 can be prolonged.

[0047] Further, as shown in Figure 2 The composite filter core 22 comprises, from bottom to top, a bacteriostatic layer 221, a carbon particle adsorption layer 222, a chlorine removal layer 223, a stone layer 224 rich in elements beneficial to pets, and a probiotic additive layer 225; during the second filtration, the circulating water first passes through the bacteriostatic layer 221 to remove bacteria, then passes through the carbon particle adsorption layer 222 to adsorb, then passes through the chlorine removal layer 223 to remove chlorine ions in the water, then passes through the stone layer 224 to release elements beneficial to pets into the circulating water, and finally passes through the probiotic additive layer 225 to release probiotics into the circulating water; through the multiple composite structures, harmful substances are filtered, the water quality and taste are improved, elements beneficial to pets are added, the drinking water amount of pets is increased, and the physical quality of pets is improved.

[0048] The bacteriostatic layer 221 can adopt a silver ion antibacterial film, a zinc ion antibacterial film, a microfiltration membrane, an ultrafiltration membrane or a filter core material doped with silver ions, which can effectively remove bacteria and viruses in the circulating water.

[0049] The chlorine removal layer 223 can adopt activated carbon fiber filter layer, copper-zinc alloy filter material, etc. The chlorine removal layer 223 of the embodiment is mainly used for removing residual chlorine (such as hypochlorous acid, chloramine, etc.) in the circulating water, so as to avoid potential influence of chlorine on the health of pets (such as stimulating the gastrointestinal tract, destroying the sense of smell, etc.).

[0050] The elements in the stone layer 224 rich in elements beneficial to pets are selected from at least one of selenium elements and strontium elements, and the purpose is to release selenium elements and strontium elements into the circulating water. Selenium (Se) is a trace element and is an important component of many enzymes, especially glutathione peroxidase, which helps to resist oxidation and protect cells from oxidative damage. For cats and dogs, appropriate amount of selenium helps immune system function, thyroid hormone metabolism and reproductive health. Strontium (Sr) belongs to alkaline earth metals and often coexists with calcium in nature. For pets, especially cats and dogs, strontium elements may have an impact on the bone health of cats and dogs, such as promoting bone formation.

[0051] Please refer to Figure 1 and Figure 2 The carrier 11 includes a lower cylinder 111 and an upper cover 112 detachably fixed to the upper end of the lower cylinder 111. The lower cylinder 111 is provided with a plurality of through holes 1112 along the circumference. The detachable structure can facilitate users to replace the vertical filter element 12 and reduce the difficulty of replacement.

[0052] The lower end of the lower cylinder 111 is connected with a connecting head 1111 penetrating up and down. The drainage end of the water pump 30 is connected with the pipeline of the connecting head 1111. The circulating water in the circulating water cavity 81 is pumped into the shell 21 by the water pump 30.

[0053] Please refer to Figure 3 The middle part of the upper cover 112 is provided with a through hole 1121 penetrating up and down. The inner wall of the through hole 1121 is provided with a plurality of clamping blocks 1122 along the circumference for clamping the shell 21, so as to prevent the shell 21 from being deviated and improve the structural stability. Moreover, the bottom of the shell 21 is inserted and matched with the carrier 11. Through the insertion and matching, it is convenient to disassemble and clean. Of course, the structure of insertion and matching can also design the whole second filter module 20 as a disposable structure. After expiration, the second filter module 20 is directly disassembled and discarded, and then a new second filter module 20 is replaced, so as to provide more choices for users.

[0054] Please refer to Figure 2The upper end of the shell 21 is connected with a water outlet structure 40, which comprises a supporting plate 41 fixed to the upper end of the shell 21, a surrounding plate 42 arranged around the supporting plate 41, and an inner cover 43 detachably mounted on the inner cover 43 arranged in the middle of the inner side of the supporting plate 41. The inner side of the surrounding plate 42 forms a first water groove 421, and the surrounding plate 42 is provided with a plurality of side water outlet holes 422 distributed in the circumferential direction. The inner cover 43 is provided with a gushing type spray hole 431 which communicates with the inner cavity of the shell 21 and the first water groove 421. The gushing type spray hole 431 can spray water upward like a fountain. After the water falls into the first water groove 421, it is discharged in the form of a faucet through the side water outlet hole 422. For pets such as cats and dogs, they can choose to drink gushing water or faucet water. These two ways of drinking water can adapt to pets of different heights and favorite drinking habits.

[0055] With the increase of the use time of the second filter module 20, more sundries and bacteria will accumulate, so it needs to be replaced regularly. However, users sometimes have difficulty remembering the replacement date of the second filter module 20, which brings great inconvenience to users. Therefore, the present embodiment is provided with a rotatable dial type turntable 44 on the inner cover 43. The upper surface of the inner cover 43 is provided with a plurality of first character marks 432 distributed in the circumferential direction. The dial type turntable 44 is provided with observation holes 441 corresponding to the positions of any two first character marks 432. The present application is provided with a rotatable dial type turntable 44. The inner cover 43 is printed with date and other first character marks 432. For example, the month marks of January, February, March, April, May, June, July, August, September, October, November and December are printed in sequence on the upper surface of the inner cover 43 in the circumferential direction. Two observation holes 441 are connected to display the new replacement date and the due date for replacement. The replacement period is fixed at 2-3 months. When used for the first time, one of the observation holes 441 of the dial type turntable 44 is turned to the use date, and the other observation hole 441 automatically displays the replacement date.

[0056] Embodiment 2

[0057] Please refer to Figure 5 and Figure 6 The present embodiment discloses a pet water dispenser, which comprises:

[0058] The filter device of embodiment 1;

[0059] The water tank comprises an outer water tank 70 and an inner water tank 80 detachably connected with the outer water tank 70. A circulating water cavity 81 is arranged in the inner water tank 80, and the circulating water cavity 81 is arranged in the outer water tank 70. The circulating water cavity 81 and the clean water cavity 71 are independent of each other.

[0060] The one-way water supplement valve is arranged at the bottom side of the circulating water cavity 81 and is used to limit the water to flow from the clean water cavity 71 to the circulating water cavity 81 in one direction.

[0061] A top cover 60 is arranged at the upper end of the water tank, and a second water tank 61 for containing water and a backflow opening 62 extending through the top cover 60 are arranged on the top cover 60. The water filtered by the composite filter element 22 is discharged into the second water tank 61, and a backflow cavity 121 is arranged below the backflow opening 62.

[0062] In the working process of the pet water dispenser, the water in the circulating water cavity 81 is pumped by the water pump 30 to the second filter module 20, and then discharged by the water outlet structure 40 towards the second water tank 61 of the top cover 60. The pets such as cats and dogs can drink the water in the second water tank 61, and the water on the top cover 60 can also flow back through the backflow opening 62. The backflow water is filtered by the first filter module 10 and then flows back into the circulating water cavity 81, so as to realize the circulation and filtration of the water.

[0063] In the present embodiment, the water tank adopts a split and nested outer water tank 70 and inner water tank 80, and the clean water cavity 71 of the outer water tank 70 and the circulating water cavity 81 of the inner water tank 80 are independent of each other. When the water level in the circulating water cavity 81 decreases, the spherical valve 52 floats up to open the water inlet 83, and the clean water in the clean water cavity 71 can flow to the circulating water cavity 81 to supplement the water in the circulating water cavity 81. The use of the spherical valve 52 has the advantage that the circulating water containing impurities after being drunk by the animals cannot flow to the clean water cavity 71, thereby avoiding cross contamination of the clean water and the circulating water. In addition, only the water in the circulating water cavity 81 participates in the circulation in the working process, the water capacity of the circulating water cavity 81 is small, and the first filter module 10 and the second filter module 20 can achieve high-efficiency filtration, thereby greatly prolonging the service life of the second filter module 20.

[0064] Further, the one-way water supplement valve is a spherical valve 52. The inner water tank 80 is provided with a channel 82 extending in the up-down direction and communicating with the circulating water cavity 81, and the spherical valve 52 can float up and down along the channel 82. The lower end of the channel 82 is connected with a water inlet 83 communicating with the clean water cavity 71. The spherical valve 52 can move up to open the water inlet 83, and can move down to block the water inlet 83. When the pressure of the circulating water cavity 81 and the clean water cavity 71 is balanced, the spherical valve 52 blocks the water inlet 83 under the action of gravity, preventing the circulating water in the circulating water cavity 81 from entering the clean water cavity 71 and polluting the clean water in the clean water cavity 71. When the water level in the circulating water cavity 81 decreases, a pressure difference is generated between the circulating water cavity 81 and the clean water cavity 71, the spherical valve 52 is lifted by the high-pressure water in the clean water cavity 71 to open the water inlet 83, and the water in the clean water cavity 71 enters the circulating water cavity 81 through the water inlet 83. The structure is ingenious.

[0065] Please refer to Figure 7The lower cylinder 111 of the embodiment is provided with a plurality of clamping grooves 1113 distributed in the circumferential direction at the upper end edge, and a second character mark is arranged between every two adjacent clamping grooves 1113, and the inner water tank 80 is provided with a protrusion 84 for clamping into the clamping groove 1113, for example, the upper end surface of the lower cylinder 111 is sequentially printed with the month marks of January, February, March, April, May, June, July, August, September, October, November and December in the circumferential direction, and the installation time of the vertical filter element 12 can be displayed by cooperating with the position of the protrusion 84, so that the user can quickly determine the replacement time.

[0066] Embodiment 3

[0067] Please refer to Figure 8 The one-way water replenishing valve of the embodiment is a duckbill silica gel valve 51, the water inlet end of the duckbill silica gel valve 51 faces the clean water cavity 71, the water outlet end faces the circulating water cavity 81, when the pressure of the circulating water cavity 81 and the clean water cavity 71 is balanced, the duckbill silica gel valve 51 is closed, preventing the circulating water in the circulating water cavity 81 from entering the clean water cavity 71 and causing the clean water in the clean water cavity 71 to be polluted, when the water level in the circulating water cavity 81 drops, a pressure difference is generated between the circulating water cavity 81 and the clean water cavity 71, the duckbill silica gel valve 51 is opened, and the water in the clean water cavity 71 enters the circulating water cavity 81 through the duckbill silica gel valve 51.

[0068] It should be noted that the duckbill silica gel valve 51 used in the one-way water replenishing valve of the embodiment is only one of the more preferred embodiments, in other embodiments, the one-way water replenishing valve can also use a cross silica gel valve and the like, and is not limited to the duckbill silica gel valve 51 of the embodiment, and these equivalent variants or replacements are all included in the range defined by the claims of the present application.

[0069] The preferred embodiments of the utility model are described in detail above, but the utility model creation is not limited to the described embodiments, and those skilled in the art can make various equivalent variants or replacements without departing from the spirit of the utility model, and these equivalent variants or replacements are all included in the range defined by the claims of the utility model creation.

Claims

1. A filter device, characterized in that The first filter module (10) comprises a carrier (11) and a vertical filter core (12) arranged in the carrier (11) in a ring shape. The lower side of the carrier (11) is provided with a circulating water cavity (81), and the inner side of the vertical filter core (12) forms a backflow water cavity (121). The water in the backflow water cavity (121) passes through the vertical filter core (12) along the circumference of the carrier (11) and then flows into the circulating water cavity (81).

2. A filter device according to claim 1, characterised in that The vertical filter core (12) has a folded or honeycomb structure.

3. The filter device of claim 1, wherein, The filter device further comprises a second filter module (20) comprising a shell (21) and a composite filter core (22) arranged in the shell (21). The lower end of the shell (21) is communicated with the circulating water cavity (81) through a water pump (30), and the upper end penetrates through the backflow water cavity (121). The water pump (30) pumps the water in the circulating water cavity (81) into the shell (21), and the water is discharged upward after being filtered by the composite filter core (22).

4. A filter device according to claim 3, characterised in that The composite filter core (22) comprises a bacteriostatic layer (221), a carbon particle adsorption layer (222), a chlorine removal layer (223), a stone layer rich in elements beneficial to pets (224), and a probiotic additive layer (225).

5. A filter device according to claim 4, characterised in that The elements in the stone layer rich in elements beneficial to pets (224) are selected from at least one of selenium and strontium.

6. The filter device of claim 3, wherein The upper end of the shell (21) is connected with a water outlet structure (40), the water outlet structure (40) comprises a supporting plate (41) fixed to the upper end of the shell (21), a surrounding plate (42) arranged around the supporting plate (41), and an inner cover (43) detachably mounted to the inner side of the supporting plate (41). The inner side of the surrounding plate (42) forms a first water tank (421), the surrounding plate (42) is provided with a plurality of side water discharge holes (422) distributed along the circumference, and the inner cover (43) is provided with a gushing type spray hole (431) communicating the inner cavity of the shell (21) with the first water tank (421).

7. A filter device according to claim 6, characterised in that A rotatable dial type turntable (44) is arranged on the inner cover (43), a plurality of first character marks (432) are arranged on the upper surface of the inner cover (43) and distributed along the circumference, and an observation hole (441) corresponding to the positions of any two first character marks (432) is arranged on the dial type turntable (44).

8. The filter device of claim 3, wherein The carrier (11) comprises a lower cylinder (111) and an upper cover (112) detachably fixed to the upper end of the lower cylinder (111), the lower end of the lower cylinder (111) is connected with a connecting head (1111) penetrating through the upper and lower ends, the water discharge end of the water pump (30) is connected with the connecting head (1111) in a pipeline manner, a plurality of clamping grooves (1113) are arranged on the upper end edge of the lower cylinder (111) and distributed along the circumference, and a second character mark is arranged between adjacent two clamping grooves (1113).

9. A filter device according to claim 8, characterised in that A through hole (1121) penetrating through the upper and lower ends is arranged in the middle of the upper cover (112), and a plurality of clamping blocks (1122) for clamping the shell (21) are arranged on the inner wall of the through hole (1121) and distributed along the circumference. The bottom of the shell (21) is plugged with the carrier (11).

10. A pet water fountain, characterized by, Comprise: The filter device of any one of claims 1-9; A water tank, the circulating water cavity (81) is arranged in the water tank, and a clean water cavity (71) which is independent of the circulating water cavity (81) is also arranged in the water tank; A one-way water supplement valve is arranged at the bottom side of the circulating water cavity (81) and is used for limiting water to flow from the clean water cavity (71) to the circulating water cavity (81) in one direction; A top cover (60) is arranged at the upper end of the water tank, a second water tank (61) for containing water and a backflow port (62) which penetrates up and down are arranged on the top cover (60), and the backflow water cavity (121) is located below the backflow port (62).

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