Water shortage and sewer blockage detection mechanism and pet water dispenser with same

Abstract

The detection mechanism comprises a base and a water tank, a water storage cavity is formed in the water tank, an upper water inlet assembly is arranged at the bottom of the water tank, and an upper water inlet channel communicated with the water storage cavity is formed in the upper water inlet assembly; a lower water inlet assembly is arranged in the base, and a lower water inlet channel is formed in the lower water inlet assembly. Wherein a first conductive piece partially extending into the bottom of the water storage cavity is further arranged at the bottom of the water tank in a penetrating mode, a second conductive piece is arranged on the base, and when the water tank is placed on the base, the first conductive piece abuts against the second conductive piece. In addition, the lower water inlet assembly further comprises a third conductive piece arranged in the lower water inlet channel in a penetrating mode, a power panel is arranged in the base, and the second conductive piece and the third conductive piece are both electrically connected to the power panel. Therefore, by the adoption of the detection mechanism, water shortage and sewer blockage can be detected at the same time, and then the use reliability of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pet drinking fountains, and in particular to a water shortage and drainage blockage detection mechanism and a pet drinking fountain having the same. Background Art

[0002] This section only provides background information related to the present application to help those skilled in the art understand the present application more thoroughly and accurately, and it is not necessarily prior art.

[0003] At present, with the development of economy and the improvement of people's living standards, keeping pets is becoming more and more common. Pets such as cats and dogs have become the best partners in people's lives. In the process of raising pets, the issue of pet diet hygiene has received more and more attention. People need to provide them with food and water regularly, so pet drinking fountains appeared.

[0004] Among them, when the water in the water storage chamber of the pet water dispenser is drunk by the pet, the water pump continues to work when there is no water in the pet water dispenser, which will cause damage to the water pump. In severe cases, the water pump will burn out and damage the pet water dispenser. For this reason, some businesses have set up a water shortage detection mechanism in the water storage chamber to achieve water shortage detection. However, in actual use, there is another situation, that is, when there are impurities in the drinking water and the drain outlet is blocked, at this time, due to the water in the water storage chamber, it cannot be detected by the water shortage detection mechanism, and the water pump continues to work, resulting in a vacuum phenomenon, which in turn causes damage to the water pump.

[0005] Therefore, how to provide a detection mechanism that can simultaneously detect water shortage in the water storage chamber and water blockage and a pet drinking fountain having the same is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] In order to overcome the defects described in the above-mentioned prior art, the utility model provides a water shortage and drain blockage detection mechanism and a pet water dispenser having the same. When there is a water shortage in the water storage chamber and a drain blockage occurs, it can be detected by the detection mechanism, thereby avoiding the water pump being emptied and improving the reliability of the product.

[0007] The technical solution adopted by the utility model to solve the problem is:

[0008] A water shortage and drainage blockage detection mechanism comprises a base and a water tank detachably arranged on the base, wherein:

[0009] A water storage cavity is provided inside the water tank, an upper water inlet assembly is provided at the bottom of the water tank, an upper water inlet channel connected to the water storage cavity is formed inside the upper water inlet assembly; a lower water inlet assembly is provided inside the base, a lower water inlet channel is formed inside the lower water inlet assembly; when the water tank is placed on the base, the upper water inlet assembly cooperates with the lower water inlet assembly to make the upper water inlet channel and the lower water inlet channel connected to each other;

[0010] Among them, a first conductive member partially extending into the bottom of the water storage chamber is also penetrated at the bottom of the water tank, and a corresponding second conductive member is provided at a position corresponding to the first conductive member on the base. When the water tank is placed on the base, the first conductive member conflicts with the second conductive member. In addition, the lower water inlet assembly also includes a third conductive member penetrated in the lower water inlet channel, a power board is provided in the base, and the second conductive member and the third conductive member are both electrically connected to the power board.

[0011] Further, the upper water inlet assembly includes an upper water inlet pipe formed with the upper water inlet channel, an upper valve core movably arranged in the upper water inlet channel, a first sealing ring sleeved on the outer side wall of the upper valve core, and a first elastic member arranged between the upper valve core and the water tank, wherein:

[0012] The bottom of the water tank is also provided with a water outlet hole which connects the water storage chamber and the upper water inlet channel respectively, and the upper valve core is inserted into the water outlet hole; under the elastic force of the first elastic member, the upper valve core can be driven to move and the first sealing ring can be abutted against the water outlet hole to achieve sealing.

[0013] Further, the lower water inlet assembly includes a first lower water inlet pipe, a second lower water inlet pipe, a lower valve core, a second sealing ring and a second elastic member, wherein:

[0014] The first lower water inlet pipe and the second lower water inlet pipe are arranged vertically, a first lower water inlet channel is formed in the first lower water inlet pipe, a second lower water inlet channel is formed in the second lower water inlet pipe, and the first lower water inlet pipe is further provided with a first through hole respectively connecting the first lower water inlet channel and the second lower water inlet channel; the first lower water inlet channel, the first through hole and the second lower water inlet channel constitute the lower water inlet channel;

[0015] The third conductive member is a metal rod inserted into the second lower water inlet pipe, the metal rod sequentially passes through the second lower water inlet channel and the first through hole and extends into the first lower water inlet channel, the lower valve core is sleeved on the metal rod and movably arranged in the first lower water inlet channel, the second sealing ring is sleeved on the metal rod and movably arranged in the second lower water inlet channel, and the second elastic member is arranged between the second sealing ring and the second lower water inlet pipe;

[0016] Under the elastic force of the second elastic member, the second sealing ring can be driven to move and abut against the first through hole to seal the first through hole.

[0017] Furthermore, a second through hole connected to the first lower water inlet channel is provided on the base, and when the water tank is placed on the base, the upper water inlet pipe can pass through the second through hole and extend into the first lower water inlet channel, wherein:

[0018] When the upper water inlet pipe extends into the first lower water inlet channel and reaches a certain position, the upper water inlet pipe drives the lower valve core to move downward and causes the second sealing ring to disengage from the first through hole to achieve communication between the first lower water inlet channel and the second lower water inlet channel. At the same time, the upper valve core is lifted up by the metal rod and causes the first sealing ring to disengage from the water outlet hole to achieve communication between the upper water inlet channel and the water storage chamber, thereby achieving mutual communication between the upper water inlet channel and the lower water inlet channel.

[0019] Furthermore, it also includes a third sealing ring arranged at the second through hole and located between the base and the first lower water inlet pipe, and the inner side wall of the third sealing ring is surrounded by a convex edge;

[0020] When the upper water inlet pipe extends into the first lower water inlet channel, the convex edge abuts against the outer side wall of the upper water inlet pipe to achieve waterproof sealing.

[0021] Furthermore, the first conductive member is a first metal nail passed through the bottom of the water tank, and the second conductive member is a second metal nail passed through the top of the base. When the water tank is placed on the base, the first metal nail abuts against the second metal nail to achieve electrical connection.

[0022] In addition, the utility model also provides a pet drinking fountain, comprising the above-mentioned water shortage and drainage blockage detection mechanism and a water pump, wherein:

[0023] The water pump is arranged in the base, and the water inlet end of the water pump is communicated with the lower water inlet channel; the water pump is electrically connected to the power board;

[0024] When the water tank is placed on the base and there is water in the water storage chamber and the lower water inlet channel, the circuit between the first conductive member, the second conductive member, the power board and the third conductive member is connected, and the power board controls the water pump to work normally; when there is no water in the water storage chamber or the lower water inlet channel, the circuit is disconnected and the power board controls the water pump to stop working.

[0025] Furthermore, it also includes an indicator light arranged on the base, and the indicator light is electrically connected to the power board;

[0026] When the water tank is placed on the base and there is water in both the water storage chamber and the lower water inlet channel, the power board controls the indicator light to not light up; when there is no water in the water storage chamber or the lower water inlet channel, the power board controls the indicator light to light up to remind the user to add water.

[0027] Furthermore, it also includes a water outlet assembly, which includes a water outlet pipe and a water outlet shell which is sleeved on the outside of the water outlet pipe and connected to the base, the water outlet end of the water pump is connected to the water inlet end of the water outlet pipe, and the water outlet end of the water outlet pipe is located above the water tank.

[0028] Furthermore, an infrared sensor for sensing the approach of a pet is installed on the water outlet shell, and the infrared sensor is electrically connected to the power board; when the pet approaches the water tank and is sensed by the infrared sensor, the infrared sensor sends a signal to the power board, and the power board controls the water pump to achieve water discharge.

[0029] In summary, the utility model provides a water shortage and drainage blockage detection mechanism and a pet water dispenser having the same, by respectively setting a first conductive member and a second conductive member on the water tank and the base, and setting a third conductive member in the lower water inlet channel, and the third conductive member and the second conductive member are both electrically connected to the power board; in this way, when the water tank is placed on the base and there is water in the water storage chamber and the lower water inlet channel, the circuit formed between the first conductive member, the second conductive member, the power board and the third conductive member is in a conducting state, and the power board controls all modules to work normally; when there is no water in the water storage chamber or drainage blockage occurs, resulting in no water in the lower water inlet channel, the circuit is in a disconnected state, and the power board controls the water pump to stop working to avoid the water pump being emptied, and at the same time controls the indicator light to light up to remind the user to add water. Therefore, the detection mechanism of the present application can simultaneously detect water shortage and drainage blockage, thereby improving the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is an explosion diagram of the pet water dispenser of the utility model;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0032] Figure 3 This is a schematic diagram of the structure of the utility model pet drinking fountain;

[0033] Figure 4 It is a cross-sectional schematic diagram of a water tank in the pet drinking fountain of the utility model;

[0034] Figure 5 It is a cross-sectional schematic diagram of the base and the water outlet assembly of the pet water dispenser of the utility model;

[0035] Figure 6 It is a cross-sectional schematic diagram of the pet drinking fountain of the utility model;

[0036] Figure 7 It is a partial structural schematic diagram of the pet drinking fountain of the present utility model.

[0037] The meanings of the reference numerals are as follows:

[0038] 1. Water tank; 11. Water storage chamber; 12. Upper water inlet assembly; 121. Upper water inlet pipe; 1211. Upper water inlet channel; 122. Upper valve core; 123. First sealing ring; 124. First elastic member; 13. First conductive member; 14. Lug; 15. Filter; 16. Water outlet; 2. Base; 21. Lower water inlet assembly; 211. First lower water inlet pipe; 2111. First lower water inlet channel; 2112. First through hole; 212, second lower water inlet pipe; 2121, second lower water inlet channel; 213, third conductive member; 214, lower valve core; 215, second sealing ring; 216, second elastic member; 22, second conductive member; 23, third sealing ring; 231, convex edge; 24, second through hole; 25, water pump; 26, power board; 27, indicator light; 3, water outlet assembly; 31, water outlet shell; 32, water outlet pipe; 33, infrared sensor. DETAILED DESCRIPTION

[0039] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the modules or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0042] See also Figure 1-6The utility model provides a pet drinking fountain, which includes a water shortage and water blockage detection mechanism, a water pump 25 and a water outlet component 3. The detection mechanism includes a base 2 and a water tank 1 detachably placed on the base 2; wherein a water storage chamber 11 is provided inside the water tank 1, an upper water inlet component 12 is provided at the bottom of the water tank 1, and an upper water inlet channel 1211 connected to the water storage chamber 11 is formed inside the upper water inlet component 12; a lower water inlet component 21 is provided inside the base 2, and a lower water inlet channel is formed inside the lower water inlet component 21; when the water tank 1 is placed on the base 2, the upper water inlet component 12 and the lower water inlet component 21 cooperate with each other and make the upper water inlet channel 1211 and the lower water inlet channel communicate with each other. In addition, the water pump 25 is arranged inside the base 2 and the water inlet end of the water pump 25 is connected to the lower water inlet channel; the water outlet assembly 3 includes a water outlet pipe 32 and a water outlet shell 31 which is sleeved on the outside of the water outlet pipe 32 and connected to the base 2, the water outlet end of the water pump 25 is connected to the water inlet end of the water outlet pipe 32, and the water outlet end of the water outlet pipe 32 is located above the water tank 1.

[0043] Therefore, when the water tank 1 is placed on the base 2 and the water pump 25 is started, the water pump 25 can pump out the water in the lower water inlet channel and let it flow out to the top of the water tank 1 through the water outlet pipe 32, so that the water can be drunk by the pet.

[0044] Furthermore, the bottom of the water tank 1 is also penetrated with a first conductive member 13 partially extending into the bottom of the water storage chamber 11, and the position of the base 2 corresponding to the first conductive member 13 is provided with a corresponding second conductive member 22, and when the water tank 1 is placed on the base 2, the first conductive member 13 conflicts with the second conductive member 22. In addition, the lower water inlet assembly 21 also includes a third conductive member 213 penetrated in the lower water inlet channel, and a power supply board 26 is provided in the base 2, and the second conductive member 22 and the third conductive member 213 are both electrically connected to the power supply board 26.

[0045] With such arrangement, when the water tank 1 is placed on the base 2 and there is water in both the water storage chamber 11 and the lower water inlet channel, the first conductive member 13 and the third conductive member 213 are in contact with water, and the circuit formed between the first conductive member 13, the second conductive member 22, the power board 26 and the third conductive member 213 is in a conducting state, and the power board 26 obtains a water signal and controls the water pump 25 to work normally; when there is no water in the water storage chamber 11 or there is a water blockage causing no water in the lower water inlet channel, the first conductive member 13 or the third conductive member 213 is not in contact with water, and the circuit is in a disconnected state, and the power board 26 obtains a water shortage signal and controls the water pump 25 to stop working. Therefore, by using the detection mechanism of the present application, it is possible to simultaneously detect water shortage and water blockage, thereby improving the reliability of the product.

[0046] See also Figure 4The upper water inlet assembly 12 includes an upper water inlet pipe 121 formed with an upper water inlet channel 1211, an upper valve core 122 movably disposed in the upper water inlet channel 1211, a first sealing ring 123 sleeved on the outer wall of the upper valve core 122, and a first elastic member 124 disposed between the upper valve core 122 and the water tank 1. The bottom of the water tank 1 is also provided with a water outlet hole 16 respectively connecting the water storage chamber 11 and the upper water inlet channel 1211, and the upper valve core 122 is penetrated in the water outlet hole 16. Therefore, under the elastic force of the first elastic member 124, the upper valve core 122 can be driven to move and the first sealing ring 123 can be abutted against the water outlet hole 16 to achieve sealing.

[0047] Preferably, the first elastic member 124 is a spring, which is sleeved on the upper valve core 122 and has one end abutting against the upper valve core 122 and the other end abutting against the bottom of the water tank 1 ; the upper water inlet pipe 121 is integrally formed at the bottom of the water tank 1 .

[0048] Therefore, when the water tank 1 is separated from the base 2, the upper valve core 122 moves downward under the elastic force of the first elastic member 124 and makes the first sealing ring 123 abut against the water outlet 16 to achieve sealing, thereby preventing the water in the water storage chamber 11 from flowing out; when the water tank 1 is placed on the base 2, the upper valve core 122 is lifted up and drives the first sealing ring 123 to separate from the water outlet 16, thereby achieving communication between the water storage chamber 11 and the upper water inlet channel 1211 to achieve water discharge.

[0049] In addition, the water tank 1 is provided with a flange 14 located at the bottom of the water storage chamber 11 and arranged around the outer periphery of the water outlet 16. A filter screen 15 is sleeved on the flange 14, and the filter screen 15 can filter the water in the water storage chamber 11 to avoid clogging.

[0050] See also Figure 5-6The lower water inlet assembly 21 includes a first lower water inlet pipe 211, a second lower water inlet pipe 212, a lower valve core 214, a second sealing ring 215 and a second elastic member 216. The first lower water inlet pipe 211 and the second lower water inlet pipe 212 are arranged up and down. A first lower water inlet channel 2111 is formed in the first lower water inlet pipe 211, and a second lower water inlet channel 2121 is formed in the second lower water inlet pipe 212. A first through hole 2112 is opened on the first lower water inlet pipe 211, which respectively connects the first lower water inlet channel 2111 and the second lower water inlet channel 2121; the first lower water inlet channel 2111, the first through hole 2112 and the second lower water inlet channel 2121 constitute a lower water inlet channel. Among them, the third conductive member 213 is a metal rod penetrated on the second lower water inlet pipe 212, and the metal rod passes through the second lower water inlet channel 2121 and the first through hole 2112 in sequence and extends into the first lower water inlet channel 2111, the lower valve core 214 is sleeved on the metal rod and movably arranged in the first lower water inlet channel 2111, the second sealing ring 215 is sleeved on the metal rod and movably arranged in the second lower water inlet channel 2121, and the second elastic member 216 is arranged between the second sealing ring 215 and the second lower water inlet pipe 212; thus, under the elastic force of the second elastic member 216, the second sealing ring 215 can be driven to move and abut against the first through hole 2112 to seal the first through hole 2112.

[0051] Preferably, the second elastic member 216 is also a spring, which is sleeved in the second lower water inlet pipe 212 and has one end abutting against the second lower water inlet pipe 212 and the other end abutting against the second sealing ring 215 .

[0052] Therefore, when the water tank 1 is separated from the base 2, the second sealing ring 215 moves upward under the elastic force of the second elastic member 216 and abuts against the first through hole 2112 to achieve sealing, thereby preventing the water in the second lower water inlet channel 2121 from flowing back; when the water tank 1 is placed on the base 2, the lower valve core 214 is pressed downward and drives the second sealing ring 215 to move downward to disengage from the first through hole 2112, thereby achieving the connection between the first lower water inlet channel 2111 and the second lower water inlet channel 2121 to achieve water discharge.

[0053] Among them, a second through hole 24 connected to the first lower water inlet channel 2111 is opened on the base 2. When the water tank 1 is placed on the base 2, the upper water inlet pipe 121 can pass through the second through hole 24 and extend into the first lower water inlet channel 2111; wherein, when the upper water inlet pipe 121 extends into the first lower water inlet channel 2111 and reaches a certain position, the upper water inlet pipe 121 drives the lower valve core 214 to move downward and the second sealing ring 215 is separated from the first through hole 2112 to achieve the connection between the first lower water inlet channel 2111 and the second lower water inlet channel 2121. At the same time, the upper valve core 122 is lifted by the metal rod and the first sealing ring 123 is separated from the water outlet hole 16 to achieve the connection between the upper water inlet channel 1211 and the water storage chamber 11, thereby achieving the mutual connection between the upper water inlet channel 1211 and the lower water inlet channel.

[0054] In addition, it also includes a third sealing ring 23 arranged at the second through hole 24 and located between the base 2 and the first lower water inlet pipe 211, and the inner wall of the third sealing ring 23 is ringed with a convex edge 231; when the upper water inlet pipe 121 extends into the first lower water inlet channel 2111, the convex edge 231 abuts against the outer wall of the upper water inlet pipe 121 to achieve a waterproof seal, thereby preventing water from entering the interior of the base 2 and damaging its components.

[0055] In this embodiment, the first conductive member 13 is a first metal nail passed through the bottom of the water tank 1, and the second conductive member 22 is a second metal nail passed through the top of the base 2. When the water tank 1 is placed on the base 2, the first metal nail abuts against the second metal nail to achieve electrical connection.

[0056] See also Figure 1 and Figure 7 The pet drinking fountain also includes an indicator light 27 arranged on the base 2, and the indicator light 27 is electrically connected to the power board 26; thus, when the water tank 1 is placed on the base 2 and there is water in the water storage chamber 11 and the lower water inlet channel, the power board 26 obtains a water signal and controls the indicator light 27 not to light up; when there is no water in the water storage chamber 11 or the lower water inlet channel, the power board 26 controls the indicator light 27 to light up to remind the user to add water.

[0057] See also Figure 5-6 Furthermore, an infrared sensor 33 for sensing the approach of a pet is installed on the water outlet housing 31, and the infrared sensor 33 is electrically connected to the power board 26; when the pet approaches the water tank 1 and is sensed by the infrared sensor 33, the infrared sensor 33 sends a signal to the power board 26, and the power board 26 controls the water pump 25 to achieve water discharge.

[0058] In summary, the utility model provides a water shortage and drain blockage detection mechanism and a pet water dispenser having the same, by respectively arranging a first conductive member 13 and a second conductive member 22 on the water tank 1 and the base 2, and arranging a third conductive member 213 in the lower water inlet channel, and the third conductive member 213 and the second conductive member 22 are electrically connected to the power board 26; in this way, when the water tank 1 is placed on the base 2 and there is water in the water storage chamber 11 and the lower water inlet channel, the circuit formed by the first conductive member 13, the second conductive member 22, the power board 26 and the third conductive member 213 is in a conducting state, and the power board 26 controls all modules to work normally; when the water storage chamber 11 is empty or a drain blockage occurs, resulting in no water in the lower water inlet channel, the circuit is in a disconnected state, and the power board 26 controls the water pump 25 to stop working to avoid the water pump 25 being emptied, and at the same time controls the indicator light 27 to light up to remind the user to add water. Therefore, by adopting the detection mechanism of the present application, it is possible to simultaneously detect water shortage and sewer blockage, thereby improving the reliability of product use.

[0059] It should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the modules or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0060] In addition, in the description of the present utility model, "multiple" and "several" mean two or more than two, unless otherwise clearly and specifically defined.

[0061] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A water shortage and sewer blockage detection mechanism, characterized in that: It comprises a base and a water tank detachably arranged on the base, wherein: A water storage cavity is provided inside the water tank, an upper water inlet assembly is provided at the bottom of the water tank, an upper water inlet channel connected to the water storage cavity is formed inside the upper water inlet assembly; a lower water inlet assembly is provided inside the base, a lower water inlet channel is formed inside the lower water inlet assembly; when the water tank is placed on the base, the upper water inlet assembly cooperates with the lower water inlet assembly to make the upper water inlet channel and the lower water inlet channel connected to each other; Among them, a first conductive member partially extending into the bottom of the water storage chamber is also penetrated at the bottom of the water tank, and a corresponding second conductive member is provided at a position corresponding to the first conductive member on the base. When the water tank is placed on the base, the first conductive member conflicts with the second conductive member. In addition, the lower water inlet assembly also includes a third conductive member penetrated in the lower water inlet channel, a power board is provided in the base, and the second conductive member and the third conductive member are both electrically connected to the power board.

2. The water shortage and drainage blockage detection mechanism according to claim 1, characterized in that: The upper water inlet assembly includes an upper water inlet pipe formed with the upper water inlet channel, an upper valve core movably arranged in the upper water inlet channel, a first sealing ring sleeved on the outer side wall of the upper valve core, and a first elastic member arranged between the upper valve core and the water tank, wherein: The bottom of the water tank is also provided with a water outlet hole which connects the water storage chamber and the upper water inlet channel respectively, and the upper valve core is inserted into the water outlet hole; under the elastic force of the first elastic member, the upper valve core can be driven to move and the first sealing ring can be abutted against the water outlet hole to achieve sealing.

3. The water shortage and drainage blockage detection mechanism according to claim 2, characterized in that: The lower water inlet assembly comprises a first lower water inlet pipe, a second lower water inlet pipe, a lower valve core, a second sealing ring and a second elastic member, wherein: The first lower water inlet pipe and the second lower water inlet pipe are arranged vertically, a first lower water inlet channel is formed in the first lower water inlet pipe, a second lower water inlet channel is formed in the second lower water inlet pipe, and the first lower water inlet pipe is further provided with a first through hole respectively connecting the first lower water inlet channel and the second lower water inlet channel; the first lower water inlet channel, the first through hole and the second lower water inlet channel constitute the lower water inlet channel; The third conductive member is a metal rod inserted into the second lower water inlet pipe, the metal rod sequentially passes through the second lower water inlet channel and the first through hole and extends into the first lower water inlet channel, the lower valve core is sleeved on the metal rod and movably arranged in the first lower water inlet channel, the second sealing ring is sleeved on the metal rod and movably arranged in the second lower water inlet channel, and the second elastic member is arranged between the second sealing ring and the second lower water inlet pipe; Under the elastic force of the second elastic member, the second sealing ring can be driven to move and abut against the first through hole to seal the first through hole.

4. The water shortage and drainage blockage detection mechanism according to claim 3, characterized in that: The base is provided with a second through hole connected to the first lower water inlet channel. When the water tank is placed on the base, the upper water inlet pipe can pass through the second through hole and extend into the first lower water inlet channel, wherein: When the upper water inlet pipe extends into the first lower water inlet channel and reaches a certain position, the upper water inlet pipe drives the lower valve core to move downward and causes the second sealing ring to disengage from the first through hole to achieve communication between the first lower water inlet channel and the second lower water inlet channel. At the same time, the upper valve core is lifted up by the metal rod and causes the first sealing ring to disengage from the water outlet hole to achieve communication between the upper water inlet channel and the water storage chamber, thereby achieving mutual communication between the upper water inlet channel and the lower water inlet channel.

5. The water shortage and drainage blockage detection mechanism according to claim 4, characterized in that: It also includes a third sealing ring disposed at the second through hole and located between the base and the first lower water inlet pipe, wherein the inner side wall of the third sealing ring is surrounded by a convex edge; When the upper water inlet pipe extends into the first lower water inlet channel, the convex edge abuts against the outer side wall of the upper water inlet pipe to achieve waterproof sealing.

6. The water shortage and drainage blockage detection mechanism according to claim 1, characterized in that: The first conductive member is a first metal nail penetrating the bottom of the water tank, and the second conductive member is a second metal nail penetrating the top of the base. When the water tank is placed on the base, the first metal nail abuts against the second metal nail to achieve electrical connection.

7. A pet drinking fountain, characterized in that: It comprises a water shortage and drainage blockage detection mechanism and a water pump as claimed in any one of claims 1 to 6, wherein: The water pump is arranged in the base, and the water inlet end of the water pump is communicated with the lower water inlet channel; the water pump is electrically connected to the power board; When the water tank is placed on the base and there is water in the water storage chamber and the lower water inlet channel, the circuit between the first conductive member, the second conductive member, the power board and the third conductive member is connected, and the power board controls the water pump to work normally; when there is no water in the water storage chamber or the lower water inlet channel, the circuit is disconnected and the power board controls the water pump to stop working.

8. The pet drinking fountain according to claim 7, characterized in that: Also included is an indicator light disposed on the base, the indicator light being electrically connected to the power board; When the water tank is placed on the base and there is water in both the water storage chamber and the lower water inlet channel, the power board controls the indicator light to not light up; when there is no water in the water storage chamber or the lower water inlet channel, the power board controls the indicator light to light up to remind the user to add water.

9. The pet drinking fountain according to claim 7, characterized in that: It also includes a water outlet assembly, which includes a water outlet pipe and a water outlet shell that is sleeved on the outside of the water outlet pipe and connected to the base. The water outlet end of the water pump is connected to the water inlet end of the water outlet pipe, and the water outlet end of the water outlet pipe is located above the water tank.

10. The pet drinking fountain according to claim 9, characterized in that: An infrared sensor for sensing the approach of a pet is installed on the water outlet housing, and the infrared sensor is electrically connected to the power board; when the pet approaches the water tank and is sensed by the infrared sensor, the infrared sensor sends a signal to the power board, and the power board controls the water pump to achieve water discharge.

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