KR102016466B1 - Pet feeder with anti-reflux structure - Google Patents

Abstract

Disclosed is a pet drinking fountain to which a backflow prevention structure is applied. A pump 30 for pumping water of the water tank 20 into the intake table 10; A recovery channel 40 for recovering water of the intake table 10; And a backflow prevention part 50 that prevents the water in the recovery channel 40 from flowing backward when the intake table 10 falls. Therefore, it is possible to prevent the reverse flow of water in the recovery channel, and the recovery channel has a plurality of radial arrangements in the intake to recover the intake water, and the guide pipe is inclined downward from one side to the center direction. Extended and non-return member can slide along the guide pipe, the center ball detects the fall of the intake table, the central hole can locate the center ball in the center or outside depending on the condition of the intake table, When positioned, the pump may stop and there may be no water pumped when the intake tumbles down, the backflow prevention member has a certain weight, can move along the ramp of the guide pipe by gravity, and the ring plate has a ring shape and cross shape Spring-supported, the switch is connected to the spring member of the ring steel plate and the other side connected to the outer ring-shaped steel plate Lines can be provided to determine whether the intake stand falls or stands on or off.

Description

PET FEEDER WITH ANTI-REFLUX STRUCTURE}

The present invention relates to a pet drinking fountain to which a backflow prevention structure is applied, and more particularly, to a pet drinking fountain to which a backflow prevention structure providing water to a pet is applied.

Users can create their own positions through social life, relax with their families in personal life, and prepare for new challenges. For users who live in their personal lives, the family creates a bridle that shares the life together. Families are created in relationships with people, but there are also aspects in which animals live together as a part.

Animals are also raised in livestock, but some pets live in the home environment. Pets are included as a member of the home and can act as companions when the user is social and lives personally in the home. These pets bring pleasure to the user and bring vitality to life. The user manages the pet by feeding or watering the pet.

A pet watering device is a watering device that supplies water periodically when pets need it. Pet drinking fountains provide water to pets when needed. If a pet accidentally falls over a pet drinking fountain, there is a problem in that the water of the tank is poured from the pet drinking fountain. When the water of the tank is poured, there is a problem in that the surrounding environment in which the pet drinking fountain is installed is covered with water and the user needs to remove the spilled water. Even if a pet fountain falls, you need a pet fountain that does not spill water from the tank.

Registration Number: 10-1661585, Portable Bucket for Pets Registration Number: 20-0432876, Pet Feeder with Dispenser

An object of the present invention for solving the above problems is to provide a pet drinking fountain applied with a backflow prevention structure that does not pour water even if the intake falls.

Another object of the present invention is to provide a pet drinking fountain to which a backflow prevention structure in which a plurality of recovery channels are arranged.

The present invention also provides a pet drinking fountain to which a backflow preventing member slides along a guide pipe.

In addition, to provide a pet drinking fountain is applied to the backflow prevention structure is located in the center or the center of the central ball.

In addition, it is to provide a pet drinking fountain is applied to the backflow prevention structure that may be no water to be pumped when the drinking fountain falls.

In addition, the backflow prevention member is to provide a pet drinking fountain to which the backflow prevention structure is moved along the slope of the guide pipe by gravity.

The present invention for achieving the above object, the pump 30 for pumping the water of the water tank 20 to the intake (10); A recovery channel 40 for recovering water of the intake table 10; And a backflow prevention part 50 that prevents the water in the recovery channel 40 from flowing backward when the intake table 10 falls.

In addition, a plurality of recovery channels 40 are arranged in the radial arrangement in the collection table 10 to recover the water of the collection table 10.

In addition, the backflow prevention part 50 includes a guide pipe 51 extending inclined downward from one side of the recovery channel 40 toward the center; And the slide is inserted into the guide pipe 51 and is positioned below the guide pipe 51 when the intake table 10 is correctly placed. When the intake table 10 falls down, the guide pipe 51 is moved upward and recovered. It includes a backflow preventing member 52 to block the waterway 40 to prevent the water in the water tank 20 to flow back through the recovery channel (40).

In addition, the backflow prevention unit 50 includes a central ball 53 for detecting the fall of the intake table 10; And a central hole 54 in which the central ball 53 is positioned at the center when the intake table 10 is properly placed, and the central ball 53 is positioned at the outside when the intake table 10 falls down. When the ball 53 is located outside, the backflow preventing member 52 controls to block the recovery channel 40.

In addition, the pump 30 is stopped when the center ball 53 is located outside.

In addition, the backflow prevention member 52 has a predetermined weight so as to slide along the guide pipe 51, and moves along the slope of the guide pipe 51 by gravity.

In addition, the central hole 54 is separated from the outer surface when the center ball 53 is located in the center, ring ring plate 541 having a ring shape to contact the outer surface when the center ball 53 is located outside; A spring member 542 extending from the cross point of the ring griddle 541 to spring-support the ring griddle 541 in the center; An outer ring-shaped iron plate 544 spaced apart from the ring iron plate 541 by a predetermined distance; And a switch 543 having one wire connected to the spring member 542 and the other wire connected to the iron plate 544 having an outer ring shape.

In addition, the reverse flow prevention part 50 detects that the switch 543 is turned on and the intake ring 10 falls when the ring iron plate 541 contacts the outer ring-shaped iron plate 544, and the ring iron plate 541 is not included. When spaced apart from the side ring-shaped iron plate 544, the switch 543 is turned off to sense that the intake table 10 is set up correctly.

When using a pet drinking fountain applied with a backflow prevention structure according to the present invention as described above it is possible to prevent the water in the recovery channel backflow.

In addition, the recovery channel has a plurality of radial arrangements in the intake has the advantage of recovering the water in the intake.

In addition, the guide pipe extends inclined downward from one side toward the center from the recovery channel, and the backflow prevention member may slide along the guide pipe.

In addition, the central ball detects the fall of the intake table, and the central hole may locate the central ball in the center or the outside depending on the state of the intake table.

In addition, when the central ball is located outside, the pump may stop and there may be no water pumped when the intake tumbles.

In addition, the backflow prevention member has a predetermined weight and can move along the slope of the guide pipe by gravity.

In addition, the ring steel plate has a ring shape and is cross-shaped spring-supported, and the switch has an electric wire on one side connected to the spring member of the ring iron plate and the other wire connected to the outer side ring-shaped iron plate 544 in an on / off state. You can determine if the fountain is falling or standing.

In addition, when the ring iron plate is in contact with the outer ring-shaped iron plate 544, the switch is turned on to detect the fall of the intake table, and when the ring iron plate is spaced apart from the outer ring-shaped iron plate 544, the switch is turned off to correctly Can sense the erect.

1 is an exemplary view of a pet drinking fountain.
2 is an exemplary view showing a recovery channel 40.
3 is an exemplary view illustrating the backflow prevention part 50.
Figure 4 is an exemplary view showing a configuration for detecting the falling intake 10.
5 is an exemplary view for explaining that the pump 30 stops when the intake table 10 falls.
6 is an exemplary view illustrating the backflow preventing member 52.
7 is an exemplary view showing the configuration of the central hole 54.
8 is an exemplary view for detecting the fall of the intake table 10 and standing upright.
9 is an exemplary view showing another embodiment of the backflow prevention member 52.
10 is an exemplary view illustrating a method of operating the backflow prevention unit 50.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The pet drinking fountain can prevent backflow of water from the recovery channel. Looking at the configuration of the pet drinking fountain, there are a number of recovery channels are arranged in a radial arrangement in the intake fountain has the advantage of recovering the water in the fountain. The guide pipe extends inclined downward from one side toward the center from the recovery channel, and the backflow prevention member may slide along the guide pipe. The central ball detects the fall of the intake table, and the central hole may locate the central ball in the center or the outside depending on the condition of the intake table. If the central ball is located outside, the pump will stop and there may be no water pumped when the intake tumbles. The backflow prevention member has a certain weight and can move along the slope of the guide pipe by gravity. The ring steel plate has a ring shape and cross-shaped spring-supported, and the switch has an electric wire on / off with an electric wire on one side connected to the spring member of the ring iron plate and the other electric wire connected to the outer ring-shaped iron plate 544. You can judge whether you fall or stand. When the ring plate is in contact with the outer ring-shaped iron plate 544, the switch is turned on to detect the fall of the intake table, and when the ring plate is spaced apart from the outer ring-shaped iron plate 544, the switch is turned off so that the intake table is erected correctly. It can be detected.

1 is an exemplary view of a pet drinking fountain.

A pump 30 for pumping water of the water tank 20 into the intake table 10; A recovery channel 40 for recovering water of the intake table 10; And a backflow prevention unit 50 which prevents the water of the water tank 20 from flowing back through the recovery channel 40 when the intake table 10 falls.

Intake table 10 is located on the upper side, the water tank 20 is located on the lower side. The pump 30 pumps the water of the water tank 20 to the water intake 10 to move the water of the water tank 20 located at the lower side to the water intake 10 located at the upper side. The recovery channel 40 recovers the water from the intake table 10 and returns it to the tank 20. Water circulates between the intake table 10 and the water tank 20. The backflow prevention unit 50 prevents the water in the water tank 20 from flowing back through the recovery channel 40 when the intake table 10 falls. When the intake table 10 falls, water of the water tank 20 may be poured through the recovery channel 40. Pet drinking fountain includes a backflow prevention unit (50) to prevent the water spill due to the falling intake (10). The reverse flow prevention unit 50 prevents water from spilling through the recovery channel 40 by blocking the recovery channel 40 when the intake table 10 falls. If the water does not spill even when the intake (10) falls, the use of pet drinking fountain is convenient. At this time, the pump 30 stops and does not pump water in the water tank 20.

The pump 30 pumps the water of the water tank 20 to the intake table 10. The pump 30 pumps the water in the tank 20 so that the pet can taste the water through the intake table 10. Normally, the pump 30 continuously pumps the water in the water tank 20 so that the water does not dry on the intake table 10. When the intake stand 10 is set up correctly, the pump 30 operates normally to pump water from the water tank 20 to the intake stand 10, and when the intake stand 10 falls down, the pump 30 stops and intakes water. Do not pump the water of the water tank 20 to the stand 10. The pump 30 determines whether or not to pump the water in the water tank 20 according to the state of the intake 10 and controls the pump 30 motor according to the determination result.

The recovery channel 40 recovers water from the intake table 10. Since water continues to be pumped into the intake 10, the water in the intake 10 should be returned to the water tank 20 without collecting water in the intake 10. The recovery channel 40 recovers the water in the inlet 10 and returns it to the tank 20. The water recovered in the water tank 20 is again supplied to the intake table 10 by the pump 30. Intake channel 10 The recovery channel 40 has a recovery hole in the reception table 10 in a radial arrangement in order to recover water, and the collection table 10 collected in the recovery hole has a water tank 20 through the recovery channel 40. Enter).

The reverse flow prevention unit 50 prevents the water in the recovery channel 40 from flowing backward when the intake table 10 falls. When the intake table 10 falls, water in the water tank 20 moves through the recovery channel 40 and is poured out through the recovery hole. Even if the intake table 10 falls, the backflow prevention unit 50 is configured in the recovery channel 40 to prevent the water of the water tank 20 from spilling. The backflow prevention unit 50 prevents the water backflow by blocking the recovery channel 40 when the intake table 10 falls.

2 is an exemplary view showing a recovery channel 40.

A plurality of recovery channels 40 are arranged in a radial arrangement on the collection table 10 to recover the water of the collection table 10. If water is continuously supplied to the intake 10 by pumping, it may overflow. Drinking Table 10 The drinking table 10 should be returned to the tank 20 so that the water does not overflow. A recovery channel 40 is connected between the intake table 10 and the water tank 20. A plurality of recovery channels 40 are arranged in a radial arrangement on the intake table 10 in an array form. The water intake 10 may flow in all directions, but a plurality of recovery channels 40 may be arranged in a radial arrangement to collect the water in the intake 10 that flows in all directions at a predetermined position. The recovery channel 40 has a recovery hole in the intake table 10. The recovery hole is formed to a certain degree lower than the height of the intake 10 so that the intake 10 water can be collected. The water intake 10 collected in the recovery hole enters the water tank 20 through the recovery channel 40.

The number of recovery channels 40 is selected differently depending on the amount of water in the intake 10. If the amount of water in the intake rack 10 is large, the number of the collection channels 40 is increased. If the amount of water in the intake rack 10 is small, the number of the collection channels 40 may be reduced. The number of recovery channels 40 may vary depending on the height of the recovery holes. For example, if the heights of the recovery holes are not the same, and the height of one recovery hole is low, the water intake 10 may accumulate in the recovery hole at a low position. If the heights of the recovery holes are the same, the water intake 10 is spread out in all directions and becomes a condition that can be collected in the recovery holes. The height of the recovery holes and the number of recovery channels 40 are determined by appropriate design choices.

3 is an exemplary view illustrating the backflow prevention part 50.

The reverse flow prevention unit 50 includes a guide pipe 51 extending inclined downward from one side of the recovery channel 40 toward the center; And the slide is inserted into the guide pipe 51 and when the intake 10 is properly placed, it is located below the guide pipe 51 downwards, and when the intake 10 falls down, the guide pipe 51 is moved upward and recovered. It includes a backflow preventing member 52 to block the waterway 40 to prevent the water in the water tank 20 to flow back through the recovery channel (40).

The backflow prevention unit 50 blocks or opens the recovery channel 40 in accordance with the falling state of the intake table 10. The backflow prevention member 52 may be configured in the guide pipe 51 so that the backflow prevention unit 50 may block or open the recovery channel 40. The guide pipe 51 slides the backflow prevention member 52 and extends downward from the one side of the recovery channel 40 toward the center so that the backflow prevention member 52 blocks or opens the recovery channel 40. The guide pipe 51 is inclined downward so that when the intake table 10 is in a normal state, the backflow preventing member 52 is positioned below the guide pipe 51, and when the intake table 10 falls, the guide pipe 51 falls. It stands up and moves to one side of the recovery channel 40 to block the recovery channel 40 to prevent the water in the water tank 20 from flowing back through the recovery channel 40.

The backflow preventing member 52 is inserted into the guide pipe 51 and slides. When the intake table 10 is properly placed, the backflow preventing member 52 is positioned below the guide pipe 51. When the intake table 10 falls, the guide pipe 51 ) To move upward to block the recovery channel 40 to prevent water from the water tank 20 from flowing back through the recovery channel 40. Guide pipe 51 may be disposed on both ends of the buffer pad or spring to mitigate the collision with the backflow prevention member (52). The buffer pad or spring helps to increase the durability of the guide pipe 51.

Figure 4 is an exemplary view showing a configuration for detecting the falling intake 10.

Backflow prevention unit 50 is the central ball (53) for detecting the fall of the intake (10); And a central hole 54 in which the central ball 53 is positioned at the center when the intake table 10 is properly placed, and the central ball 53 is positioned at the outside when the intake table 10 falls down. When the ball 53 is located outside, the backflow preventing member 52 controls to block the recovery channel 40.

The reverse flow prevention unit 50 includes a detector configured to detect falling of the intake table 10. The sensing unit has a center ball 53 for detecting the fall of the intake 10; And a central hole 54 in which the central ball 53 is positioned at the center when the intake table 10 is properly placed, and the central ball 53 is positioned at the outside when the intake table 10 falls down. When the ball 53 is located outside, the backflow preventing member 52 controls to block the recovery channel 40. The center ball 53 moves according to the state of the intake table 10. The central hole 54 positions the central ball 53 at the center when the intake table 10 is properly placed, and places the central ball 53 at the outside when the intake table 10 falls. The sensing unit controls the backflow preventing member 52 to block the recovery channel 40 when the central ball 53 is located at the outside.

5 is an exemplary view for explaining that the pump 30 stops when the intake table 10 falls.

When the intake table 10 falls down, the backflow prevention member 52 controls to block the recovery channel 40. When the central ball 53 is located outside, the pump 30 stops. When the center ball 53 configured in the sensing unit is located outside the center hole, the pump 30 stops the operation and does not pump water from the water tank 20 to the intake table 10. In response to the fall of the intake table 10, the backflow prevention unit 50 operates, and the pump 30 also stops the operation to prevent water from pouring in the intake table 10 to the bottom.

6 is an exemplary view illustrating the backflow preventing member 52.

The backflow prevention member 52 has a predetermined weight to slide along the guide pipe 51, and moves along the slope of the guide pipe 51 by gravity. The backflow prevention member 52 has a predetermined weight and slides along the guide pipe 51. The backflow prevention member 52 uses gravity to move the slide and moves along the slope of the guide pipe 51 by gravity. While the backflow prevention member 52 uses gravity, gravity varies depending on the weight of the backflow prevention member 52. In order to obtain the gravity above a certain level, the backflow preventing member 52 must have a weight within a certain range to slide along the guide pipe 51. Too small a weight reduces the slide movement force, too large a weight to increase the slide movement force, but may be struck hard at both ends of the guide pipe 51 may damage the guide pipe 51.

7 is an exemplary view showing the configuration of the central hole 54.

The central hole 54 is separated from the outer surface when the center ball 53 is located in the center, and a ring iron plate 541 having a ring shape that contacts the outer surface when the center ball 53 is located outside; A spring member 542 extending from the cross point of the ring griddle 541 to spring-support the ring griddle 541 in the center; An outer ring-shaped iron plate 544 spaced apart from the ring iron plate 541 by a predetermined distance; And a switch 543 having one wire connected to the spring member 542 and the other wire connected to the iron plate 544 having an outer ring shape.

The central hole 54 includes a center ball 53 and a sensing unit for sensing the movement of the center ball 53. The sensing unit is separated from the outer surface when the center ball 53 is located in the center, the ring iron plate 541 having a ring shape that touches the outer surface when the center ball 53 is located outside; A spring member 542 extending from the cross point of the ring griddle 541 to spring-support the ring griddle 541 in the center; And a switch 543 having one wire connected to the spring member 542 and the other wire connected to the iron plate 544 having an outer ring shape. The sensing unit detects the movement of the center ball 53 by turning on / off the switch 543 connected to the ring plate 541 and the outer side ring-shaped plate 544.

The ring iron plate 541 is separated from the outer surface when the center ball 53 is located at the center, and has a ring shape that contacts the outer surface when the center ball 53 is located at the outside. The ring iron plate 541 has a ring shape and touches or falls off the outer surface according to the movement of the center ball 53. As the center ball 53 moves, the ring iron plate 541 moves. The ring iron plate 541 is supported by the spring member 542, and the spring member 542 extends from the cross point of the ring iron plate 541 to spring support the ring iron plate 541 at the center.

The switch 543 has one wire connected to the spring member 542 and the other wire connected to the iron plate 544 having an outer ring shape. The switch 543 is turned on / off by the movement of the center ball 53. When the switch 543 is turned on, the one wire and the other wire are in contact with each other, and when the switch is off, the one wire and the other wire are disconnected.

8 is an exemplary view for detecting the fall of the intake table 10 and standing upright.

The reverse flow prevention part 50 detects that the switch 543 is turned on when the ring plate 541 is in contact with the outer side ring-shaped plate 544 and the fall of the intake table 10, and the ring plate 541 is an outer side ring. When spaced apart from the iron plate (544) of the shape, the switch 543 is off to sense that the intake table 10 is set up correctly.

The reverse flow prevention unit 50 senses that the intake table 10 falls and the intake table 10 is set up correctly by the switch 543 on / off. The backflow prevention unit 50 determines the state of the intake stand 10 by sensing the on / off switch 543 by providing different on / off states to the intake stand 10 and the intake stand 10. Can be.

In summary, the pet drinking fountain can prevent the water in the recovery channel from flowing back.

The recovery channel has a plurality of radial arrangements in the intake table has the advantage of recovering the intake water.

The guide pipe extends inclined downward from one side toward the center from the recovery channel, and the backflow prevention member may slide along the guide pipe.

The central ball detects the fall of the intake table, and the central hole may locate the central ball in the center or the outside depending on the condition of the intake table.

If the central ball is located outside, the pump will stop and there may be no water pumped when the intake tumbles.

The backflow prevention member has a certain weight and can move along the slope of the guide pipe by gravity.

The ring steel plate has a ring shape and cross-shaped spring-supported, and the switch has an electric wire on / off with an electric wire on one side connected to the spring member of the ring iron plate and the other electric wire connected to the outer ring-shaped iron plate 544. You can judge whether you fall or stand.

When the ring plate is in contact with the outer ring-shaped iron plate 544, the switch is turned on to detect the fall of the intake table, and when the ring plate is spaced apart from the outer ring-shaped iron plate 544, the switch is turned off so that the intake table is erected correctly. It can be detected.

Example 1

9 is an exemplary view showing another embodiment of the backflow prevention member 52.

The backflow prevention member 52 includes a tube space 521 having a space in the longitudinal direction therein and a bead 522 moving in the tube space 521. As the intake 10 falls or is erected correctly, the beads 522 move downward in the tube space 521 where gravity acts. Since the beads 522 move in the tube space 521, gravity acceleration force may be provided to the backflow prevention member 52 when the backflow prevention member 52 slides. Gravity acceleration helps to overcome the threshold frictional force of the backflow prevention member 52.

Example 2

10 is an exemplary view illustrating a method of operating the backflow prevention unit 50.

The backflow prevention part 50 has a stabilization time 5433 when switching from the on / off section 5431 to the off section 5432 in the on / off section of the switch 543, and after the stabilization time 5433, the pump 30. To operate. When the backflow prevention unit 50 stops and operates the pump 30 according to the switch 543 on / off, the intake table 10 falls down and at the same time the pump 30 is operated to operate the intake table 10. This can be unstable. The backflow prevention unit 50 may stably process the operation of the pump 30 by giving a stabilization time 5433.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

10: intake 20: tank
30: pump 40: recovery channel
50 Backflow preventer 51: Guide piping
52: backflow prevention member 53: center ball
54: central hole 521: tube space
522: beads 541: ring iron plate
542: spring member 543: switch

Claims (8)

A pump 30 for pumping water of the water tank 20 into the intake table 10;
A recovery channel 40 for recovering water of the intake table 10; And
When the intake 10 falls down includes a backflow prevention unit 50 for preventing the water in the recovery channel 40 backflow,
The backflow prevention part 50 includes a guide pipe 51 extending inclined downward from one side of the recovery channel 40 toward the center; And
The guide pipe 51 is inserted and slides, and when the intake table 10 is properly placed, the guide pipe 51 is located below and downward, and when the intake table 10 falls, the guide pipe 51 is upward. Moving to the water supply block 40 is applied to the back of the water supply tank 40 is applied to the pet drinking tank with a backflow prevention structure including a backflow preventing member 52 for preventing the water of the water tank 20 backflow through the recovery channel 40 . The method of claim 1,
The collection channel 40 is a pet drinking fountain is applied to the backflow prevention structure is arranged in a plurality of radial arrangement on the intake (10) to recover the water in the intake (10). delete The method of claim 1,
The backflow prevention unit 50 includes a central ball 53 for detecting the fall of the intake 10; And
When the intake table 10 is properly placed, the central ball 53 is positioned at the center, and when the intake table 10 falls, the central hole 54 which positions the central ball 53 at the outside is further provided. Including,
When the center ball 53 is located on the outside, the backflow preventing member 52 is applied to the pet drinking fountain is applied to prevent the backflow structure to block the recovery channel (40). The method of claim 4, wherein
Pet center is applied to the backflow prevention structure is stopped when the center ball 53 is located at the outside of the pump (30). The method of claim 4, wherein
The backflow preventing member 52 has a predetermined weight so as to slide along the guide pipe 51, and a pet drinking fountain to which a backflow prevention structure is moved along a slope of the guide pipe 51 by gravity. The method of claim 4, wherein
The central hole 54 is separated from the outer surface when the center ball 53 is located in the center, ring ring plate 541 having a ring shape to contact the outer surface when the center ball 53 is located outside;
A spring member 542 extending from a cross point of the ring iron plate 541 to spring-support the ring iron plate 541 in the center;
An outer ring-shaped iron plate 544 spaced apart from the ring iron plate 541 by a predetermined distance; And
Pet back of the pet applied to the backflow prevention structure including a switch (543) having a wire of one side connected to the spring member 542 and the other side wire connected to the iron plate (544) of the outer ring shape. The method of claim 7, wherein
The reverse flow prevention unit 50 detects the fall of the intake table 10 when the ring plate 541 is in contact with an outer ring-shaped plate 544, and the switch 543 is turned on. When the water supply 541 is spaced apart from the outer ring-shaped iron plate (544), the switch 543 is turned off, the pet drinking fountain is applied to the backflow prevention structure to sense that the intake 10 is built correctly.

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