CN221235670U - Miniature automatic water feeding tank with float valve - Google Patents

Abstract

The utility model discloses a miniature automatic water feeding and draining tank with a ball float valve.A bottle cover is provided with an air outlet and a water inlet, and the bottom of a bottle body is provided with a water outlet and a water return opening; the bottle cap bottom be equipped with the inner support that is used for the swing installation pendulum rod one and pendulum rod two, pendulum rod one end and inner support rotate to be connected, the middle part swing joint of the other end and pendulum rod two, pendulum rod two's upper end and inner support rotate to be connected, the other end is connected with the floater, water inlet bottom install the case, pendulum rod one's top be equipped with the silica gel pad that is used for sealed case. The utility model uses the force amplification effect of two swing rod levers by the buoyancy of the floating ball in water, realizes the sealing and opening of the small floating ball on the high water pressure water flow, and the whole control device has a physical structure, does not need electric control, has low cost and strong practicability, and can be used as a gas-liquid separation tank.

Description

Miniature automatic water feeding tank with float valve

Technical Field

The utility model belongs to the technical field of pure water hydrogen production equipment, and particularly relates to a miniature automatic water feeding tank with a ball float valve.

Background

The water tank and the gas-liquid separation tank are indispensable components of a pure water hydrogen production system, and are important components of the pure water electrolysis cell hydrogen production system.

In the pure water hydrogen-producing electrolytic cell system, the water tank is a component for storing pure water, and has the function of supplying water to the anode of the electrolytic cell, and the electrolytic cell breaks down the water into hydrogen and oxygen. The water tank is generally designed into an artificial water adding mode, and when the water tank lacks water, pure water needs to be manually added into the water tank. Some water tanks are internally provided with a liquid level sensing component, and when the water quantity of the water tank is insufficient, the water tank alarms to a user through a control board, but the water tank also needs to be manually inserted to supplement pure water. If the automatic water supplementing function is to be realized, a more complex electric control system is needed, and parts such as an electromagnetic valve, a contact switch, a control panel and the like are added.

In addition, the gas-liquid separation tank is a component for separating hydrogen from water from the cathode of the electrolytic tank, and the hydrogen is sent into a pipeline for use after separation, and the water is recycled to the water tank for reuse. The main flow of the existing gas-liquid separation tank is mechanical, a float is arranged in the main flow, when water accumulates to a certain amount, the float can be lifted by the buoyancy of the water, and the water in the gas-liquid separation tank is returned to the water tank through a water outlet after the float is lifted. The mechanical float type gas-liquid separation tank has the problem of low reliability, and the situation that the floats are blocked or inclined to cause the normal separation of hydrogen and water often occurs.

Disclosure of utility model

Based on the problems existing in the background technology, the utility model aims to provide a miniature automatic water feeding tank with a float valve, which is linked through a mechanical structure and automatically realizes automatic water supplement of the tank by adopting a water buoyancy principle, and can be used as a gas-liquid separation tank.

The utility model aims at being completed through the following technical scheme that the miniature automatic water feeding tank with the float valve comprises a bottle body and a bottle cap, wherein the bottle cap is connected to the top of the bottle body, an air outlet and a water inlet are arranged on the bottle cap, and a water outlet and a water return port are arranged at the bottom of the bottle body; the bottle cap bottom be equipped with the inner support that is used for the swing installation pendulum rod one and pendulum rod two, pendulum rod one end and inner support rotate to be connected, the middle part swing joint of the other end and pendulum rod two, pendulum rod two's upper end and inner support rotate to be connected with the floater, the other end be connected with the water inlet bottom install the case, pendulum rod one's top be equipped with the silica gel pad that is used for sealed case, works as when the internal water level of bottle rises, the floater rises and drives the silica gel pad shutoff water inlet through pendulum rod two and pendulum rod.

Preferably, the inner bracket is provided with a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are respectively positioned at two sides of the inner bracket, and the second mounting hole is positioned at the lower position of the first mounting hole.

Preferably, the first swing rod is provided with a first installation shaft and a second installation shaft, the first installation shaft and the second installation shaft are respectively positioned on two sides of the first swing rod, the second installation shaft is positioned below the first installation shaft, and the first swing rod is connected with the first installation hole through the first installation shaft.

Preferably, the second swing rod is obliquely arranged, the upper end of the second swing rod is provided with a third mounting shaft, the lower end of the second swing rod is provided with a fourth mounting shaft, and the middle of the second swing rod is provided with a third mounting hole; the second swing rod is connected with the second mounting hole through a third mounting shaft, the top of the floating ball is connected with the fourth mounting shaft through a hook, and the first swing rod is movably connected with the third mounting hole through the second mounting shaft.

Preferably, the third mounting hole is a strip-shaped movable hole.

Preferably, a pressing piece mounting opening is formed in the middle of the first swing rod, a pressing piece buckle is arranged on one side of the pressing piece mounting opening, a pressing piece is mounted in the pressing piece mounting opening and buckled with the pressing piece buckle, and the silica gel pad is fixed at the top of the first swing rod through the pressing piece buckle.

Preferably, the volume of the bottle body is 50-300ml.

Preferably, the inner support is provided with an exhaust hole which is communicated with an exhaust hole on the bottle cover.

Preferably, the bottle body is connected with the bottle cap through threads.

Preferably, the bottom of the exhaust port is provided with an O-shaped ring fixing hole, a 0-shaped ring is arranged in the O-shaped ring fixing hole, the bottom of the water inlet is provided with a valve core fixing hole, the valve core is arranged in the valve core fixing hole, and the center of the valve core is provided with a water through hole.

Compared with the prior art, the utility model has at least the following obvious advantages and effects:

1. The utility model realizes the closing and opening of the small floating ball to the high water pressure water flow by utilizing the force amplification effect of the two swing rod levers through the buoyancy of the floating ball in the water, and the whole control device has a physical structure, does not need electric control, and has low cost and strong practicability.

2. The utility model can be matched with an RO water purifier to realize the automatic water feeding function of a pure water electrolytic tank system without manual water feeding, and the volume can be very small and the sealing element is positioned accurately.

3. The utility model can be used as a gas-liquid separation tank after being inverted, and can effectively solve the problem that the floats in the traditional mechanical float-type gas-liquid separation tank are blocked or the floats are inclined to cause that the hydrogen and the water cannot be separated normally.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the sinking structure of the floating ball in the utility model;

FIG. 3 is a schematic diagram showing the floating structure of the floating ball in the utility model;

FIG. 4 is an exploded view of the present utility model;

FIG. 5 is a schematic view of the structure of the bottle body in the present utility model;

FIG. 6 is a schematic view of the structure of the bottle cap according to the present utility model;

FIG. 7 is a schematic view of the structure of the inner bracket of the present utility model;

FIG. 8 is a schematic diagram of a first swing link structure according to the present utility model;

FIG. 9 is a schematic diagram of a second swing link structure in the present utility model;

FIG. 10 is a schematic view of the structure of the floating ball according to the present utility model;

FIG. 11 is a schematic view of the structure of the valve element of the present utility model;

fig. 12 is a schematic structural view in embodiment 3 of the present utility model;

FIG. 13 is a schematic view showing the sinking structure of the floating ball in embodiment 3 of the present utility model;

FIG. 14 is a schematic view showing the floating structure of the floating ball in embodiment 3 of the present utility model;

list of parts in the present utility model

1. A bottle body; 2. a bottle cap; 3. an inner bracket; 4. a swing rod I; 5. a swing rod II; 6. a floating ball; 7. a silica gel pad; 8. tabletting; 9. a valve core; 10. an O-ring; 11. a water outlet; 12. a water return port; 21. an exhaust port; 22. a water inlet; 23. an O-ring fixing hole; 24. a valve core fixing hole; 31. a first mounting hole; 32. a second mounting hole; 33. an exhaust hole; 41. a first mounting shaft; 42. a second mounting shaft; 43. a tabletting mounting port; 44. tabletting and buckling; 51. a third mounting shaft; 52. a fourth mounting shaft; 53. a third mounting hole; 61. a hook; 91 water holes.

Detailed Description

Specific embodiments of the utility model are described in order to teach those skilled in the art how to make and use the best mode of the utility model in conjunction with the accompanying drawings and the following description. The following conventional aspects have been simplified or omitted in order to teach the inventive principles. Those skilled in the art will appreciate variations from these embodiments that fall within the scope of the utility model. Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the utility model. The terms such as "upper", "lower", "left", "right", "middle" and "a" and the like are also used herein for descriptive purposes only and are not intended to limit the scope of the utility model for which the utility model may be practiced or for which the relative relationship may be altered or modified without materially altering the technology. Thus, the present utility model is not limited to the specific embodiments described below, but only by the claims and their equivalents.

Example 1

As shown in fig. 1 to 11, the embodiment discloses a miniature automatic water feeding tank with a float valve, which comprises a bottle body 1 and a bottle cap 2, wherein the volume of the bottle body 1 is 100ml, the bottle cap 2 is in threaded connection with the top of the bottle body 1, the bottle cap 2 is provided with an air outlet 21 and a water inlet 22, the water inlet 22 is used for feeding water from an RO water purifier, the electrolytic tank returns water with oxygen, the oxygen is discharged from the air outlet 21, and the bottom of the bottle body 1 is provided with a water outlet 11 and a water return port 12; the water outlet 11 is used for supplying water to the electrolytic tank, and the water return opening 12 is used for returning water from the electrolytic tank to the water tank. The bottom of the bottle cap 2 is provided with an inner bracket 3 for swinging and installing a first swing rod 4 and a second swing rod 5, one end of the first swing rod 4 is rotatably connected with the inner bracket 3, the other end of the first swing rod is movably connected with the middle part of the second swing rod 5, the upper end of the second swing rod 5 is rotatably connected with the inner bracket 3, the other end of the second swing rod is connected with a floating ball 6, the floating ball 6 is positioned in the bottle body 1, the bottom of the air outlet 21 is provided with an O-shaped ring fixing hole 23, a 0-shaped ring 10 is installed in the O-shaped ring fixing hole 23, the bottom of the water inlet 22 is provided with a valve core fixing hole 24, the valve core 9 is installed in the valve core fixing hole 24, and the center of the valve core 9 is provided with a water through hole 91; the top of the first swing rod 4 is provided with a silica gel pad 7 for sealing the water through hole 91, and when the water level in the bottle body 1 rises, the floating ball 6 rises to drive the silica gel pad 7 to seal the water inlet 22 through the second swing rod 5 and the first swing rod 4.

As shown in fig. 7, in the embodiment of the present application, the inner bracket 3 is provided with a first mounting hole 31 and a second mounting hole 32, the first mounting hole 31 and the second mounting hole 32 are respectively located at two sides of the inner bracket 3, the second mounting hole 32 is located at a position below the first mounting hole 31, the inner bracket 3 is provided with an exhaust hole 33, and the exhaust hole 33 is communicated with the exhaust port 21 on the bottle cap 2.

As shown in fig. 8, the first swing rod 4 is provided with a first mounting shaft 41 and a second mounting shaft 42, the first mounting shaft 41 and the second mounting shaft 42 are respectively located at two sides of the first swing rod 4, the second mounting shaft 42 is located at a position below the first mounting shaft 41, and the first swing rod 4 is connected with the first mounting hole 31 through the first mounting shaft 41, so that the first swing rod 4 can swing up and down by taking the first mounting shaft 41 as a rotating shaft.

As shown in fig. 9, the second swing rod 5 is obliquely arranged, the upper end of the second swing rod 5 is provided with a third mounting shaft 51, the lower end of the second swing rod is provided with a fourth mounting shaft 52, and the middle of the second swing rod is provided with a third mounting hole 53; the second swing rod 5 is connected with the second mounting hole 32 through the third mounting shaft 51, the top of the floating ball 6 is connected with the fourth mounting shaft 52 through the hook 61, the first swing rod 4 is movably connected with the third mounting hole 53 through the second mounting shaft 42, and the third mounting hole 53 is a strip-shaped movable hole, so that a sliding space can be reserved in the third mounting hole 53 by the second mounting shaft 42. After being connected with the fourth mounting shaft 52 on the second swing rod 5, the hook 61 on the floating ball 6 is mounted in the bottle body 1, the floating ball 6 and the second swing rod 5 form a relatively stable structure after being limited by the bottle body 1, namely, the fourth mounting shaft 52 and the hook 61 cannot fall off and can slide in a U-shaped opening of the hook 61, the floating ball 6 is of a hollow structure, and the mass and drainage volume ratio of the floating ball 6 is less than or equal to 0.7g/ml.

As shown in fig. 8, a tablet mounting opening 43 is provided in the middle of the first swing rod 4, a tablet fastener 44 is provided on one side of the tablet mounting opening 43, a tablet 8 is mounted in the tablet mounting opening 43 and fastened with the tablet fastener 44, and the silica gel pad 7 is fixed at the top of the first swing rod 4 through the tablet fastener 44. The silica gel pad 7 is made of solid silica gel, has the hardness range between A30 and A70 and can be selectively adjusted according to the water pressure of the water inlet; the pressing piece 8 is internally provided with a groove for placing the silica gel pad 7, the pressing piece 8 is arranged on the swing rod I4 through a buckling structure, and the pressing piece is used for fixing the position of the silica gel pad 7 and keeping the flatness of the silica gel pad 7.

In the application, the diameter of the water through hole 91 is between 0.2mm and 2mm, and when the water inlet pressure is larger (the water pressure application range of the device is 0 to 1 Mpa), a smaller channel diameter and a smaller valve core top diameter are needed to achieve the required sealing effect.

When the water level in the bottle body 1 rises to drive the floating ball 6 to float upwards, the buoyancy is transmitted to the second swing rod 5 through the fourth mounting shaft 52 at the connection point of the floating ball 6 and the second swing rod 5 to drive the second swing rod 5 to rotate upwards by taking the second mounting hole 32 as the center; when the second swing rod 5 rotates upwards, the third mounting hole 53 in the middle of the second swing rod 5 synchronously rotates upwards to push the first swing rod 4 mounted in the third mounting hole 53 to rotate upwards around the first mounting hole 31, and when the first swing rod 4 rotates upwards around the first mounting hole 31 as the axis, the silica gel pad 7 fixed on the first swing rod 4 can seal the water through hole 91 of the valve core 9 in the valve core fixing hole 24 of the bottle cap 2, so that water inflow is blocked.

Real-time stream 2

The chicken farm has fifty thousand chickens, so that the fifty thousand chickens drink hydrogen-rich water, and five tons of hydrogen water are needed to be prepared in one day. The chicken farm is provided with a hydrogen-rich water preparation device in a pump house, a hydrogen source of the hydrogen-rich water preparation device is a pure water electrolysis hydrogen production electrolytic tank with the concentration of 600ml/min, if a common water tank is used, an artificial water supply tank is almost required to be used for water supply every day, and if water is not supplied in time, the electrolytic tank can also face the risk of dry burning damage caused by water shortage.

In the embodiment, the miniature automatic water feeding tank with the float valve supplies water for the pure water electrolysis hydrogen production electrolytic tank.

The water outlet of the RO water purifier is connected with a mixed bed resin tank through a 2-branch PE pipe (the TDS value of the water outlet of the RO water purifier is still higher, the resin tank is required to absorb mineral substances again so that the water quality meets the water requirement of a pure water electrolysis tank), the pure water purified by the resin tank is connected with a water inlet 22 on a bottle cap 2 through the two-branch PE pipe and a quick connector,

No water exists in the bottle body 1 in the initial state, the floating ball 6 is positioned at the bottom of the bottle body 1, the silica gel pad 7 and the valve core 9 are in a separation state, pure water enters the bottle body 1 after entering the water inlet 22 and passing through the water through hole 91 of the valve core 9, and automatic water feeding is realized through the following process:

Step 1, an external water source enters a bottle body 1 through a valve core 9;

Step 2, floating a floating ball 6 in the bottle body 1 along with the rise of the water level;

Step 3, the buoyancy of the floating ball 6 drives the swing rod II 5 to rotate and ascend by taking the second mounting hole 32 of the inner bracket 3 as the center;

Step 4, the swing rod II 5 is a labor-saving lever, the power arm (the horizontal distance from the fourth mounting shaft 52 to the third mounting shaft 51) is larger than the resistance arm (the distance from the second mounting shaft 42 to the third mounting shaft 51), so that under the action of the lever force, the second mounting shaft 42 slides in the third mounting hole 53 (the mounting hole is long-strip-shaped) to the position of the third mounting shaft 51, and meanwhile, the swing rod I4 rotates upwards by taking the first mounting hole 31 of the inner bracket 3 as the center;

Step 5, the swing rod 4 is also a labor-saving lever, and the power arm (the projection length of the distance from the second mounting shaft 42 to the first mounting shaft 41 in the stress direction) is larger than the resistance arm (the distance from the contact point of the silica gel pad 7 and the valve core 9 to the first mounting shaft 41), so that the swing rod 4 can make the silica gel pad 7 touch the valve core 9 and block the water through hole 91 of the valve core 9 under the upward force;

Step 6, if the pressure of the water inlet waterway is large, the silica gel pad 7 can continuously enter the water tank under the condition of small lifting force, the floating ball 6 can generate larger buoyancy force to push the swing rod II 5, the swing rod I4 is pushed under the action of the lever force, the swing rod I4 continuously lifts the silica gel pad 7 under the action of the lever force, and finally the water through hole 91 of the valve core 9 is completely plugged;

Step 7, the water in the bottle body 1 is consumed by hydrogen production in the electrolytic tank, after the water level is reduced, the floating ball 6 descends, the swing rod II 5 and the swing rod I4 are pulled down, the valve core 9 is not blocked by the silica gel pad 7, and the water is injected into the bottle body 1 through the valve core 9;

Step 8, when the electrolytic tank returns the water flowing through the electrolytic tank to the bottle body 1 through the water return port 12 on the bottle body 1, the oxygen generated by the electrolytic tank is carried with the water, the oxygen is lighter than the water, and the oxygen can float on the water surface under natural conditions and leaves the bottle body 1 through the air outlet 21;

Step 9, returning to the step 2 in this example, and circularly reciprocating, the automatic water supply and water supplementing functions of the water tank to the electrolytic tank system can be realized.

According to the embodiment, the water tank is matched with the RO water purifier, so that the automatic water supply and automatic water supplementing of the pure water hydrogen production electrolytic tank can be realized with low cost and high reliability, and the automatic operation capability of the system can be effectively improved.

Example 3

As shown in fig. 12 to 14, the water tank of the first embodiment is inverted and the exhaust port 21 is closed, so that the water tank can be used as a gas-liquid separation tank of a pure water hydrogen system.

The hydrogen generated at the cathode side of the electrolytic tank is accompanied with a small amount of water, the hydrogen mixed with water is discharged from the hydrogen outlet, a gas-liquid separation device is needed to separate the hydrogen from the water, the separated hydrogen is transmitted out through a gas path, and the water can be returned to the water tank for recycling.

In the traditional gas-liquid separation tank, a float with silica gel at the bottom is matched with a water outlet at the bottom of the separation tank to realize gas-water separation, when the water in the separation tank is less, the silica gel at the bottom of the float seals the water outlet, when the water in the tank reaches a certain amount, the float rises under the buoyancy effect of the water, and a silica gel pad also rises along with the float to open the water outlet to discharge the water. The conventional gas-liquid separation tank has the following defects:

1. In order to avoid the float being blocked by the tank body of the separating tank, the diameter of the float is usually smaller than that of the separating tank, and under the normal condition, the float has an inclined angle in the separating tank, and the inclined angle can lead to a certain inclination between the silica gel and the water outlet, so that the reliability is not high, and the water draining channel is not sealed in the anhydrous state of the separating tank, so that the gas returns to the water tank from the water returning channel.

2. When the gas-liquid separation tank is anhydrous, the silica gel is mainly forced by the weight of the floater, the effect of sealing the water return channel is achieved, and in order to increase the pressure of the weight of the floater on the silica gel, the weight of the floater is often larger, so that the volume of the floater is larger, and the application in a very narrow space is limited.

The device in the application can be used as a gas-liquid separation tank to well solve the defects of the traditional gas-liquid separation tank, and reliable gas-liquid separation is realized through the following processes:

Step 1, the exhaust port 21 is blocked (an O-shaped ring 10 can be placed in the O-shaped ring fixing hole 23);

Step 2, conveying a mixture of hydrogen and water produced by the electrolytic tank into a water outlet 11 through a pipeline;

step 3, water in the gas-liquid mixture entering the water outlet 11 sinks to the bottom of the bottle body 1 under the action of gravity, and hydrogen gradually fills the bottle body 1;

Step 4, discharging hydrogen from the water return port 12, and conveying the hydrogen to a specific place for storage or use through a pipeline;

Step 5, the gravity of the floating ball 6 and the swing rod II 5 in the bottle body 1 is held at the silica gel pad 7 under the amplifying action of the lever, and the silica gel pad 7 reliably seals the water through hole 91 of the valve core 9 under larger downward pressure because the silica gel pad 7 is limited by the pressing sheet 8;

step 6, when more and more water is in the bottle body 1, the floating ball 6 rises under the action of the floating force and pulls the swing rod II 5 and the swing rod I4 to rise;

step 7, lifting the silica gel pad 7 along with the rising of the swing rod I4, opening the water through hole 91 of the valve core 9, and discharging water in the bottle body 1;

And 8, after a certain amount of water is discharged, the buoyancy of the floating ball 6 is reduced, the floating ball starts to descend, and under the lever action of the first swing rod 4 and the second swing rod 5, the sealing gasket 7 seals the water through hole 91 of the valve core 9.

The embodiment well solves the problems of poor sealing performance, insufficient reliability and large volume of the traditional gas-liquid separation tank, and can be matched with an electrolytic tank to perform efficient and effective gas-liquid separation.

Since it will be readily apparent to those skilled in the art that any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present utility model are intended to be included within the scope of the claims of the present utility model.

Claims (10)

1. The miniature automatic water feeding tank with the float valve comprises a bottle body and a bottle cap, wherein the bottle cap is connected to the top of the bottle body, an air outlet and a water inlet are formed in the bottle cap, and a water outlet and a water return port are formed in the bottom of the bottle body; the bottle cap is characterized in that an inner support used for swinging and installing a first swing rod and a second swing rod is arranged at the bottom of the bottle cap, one end of the first swing rod is rotatably connected with the inner support, the other end of the first swing rod is movably connected with the middle of the second swing rod, the upper end of the second swing rod is rotatably connected with the inner support, the other end of the second swing rod is connected with a floating ball, a valve core is arranged at the bottom of the water inlet, a silica gel pad used for sealing the valve core is arranged at the top of the first swing rod, and when the water level in the bottle body rises, the floating ball rises to drive the silica gel pad to seal the water inlet through the second swing rod and the second swing rod.

2. The miniature automatic water feeding tank with a float valve as claimed in claim 1, wherein the inner bracket is provided with a first mounting hole and a second mounting hole, the first mounting hole and the second mounting hole are respectively positioned at two sides of the inner bracket, and the second mounting hole is positioned below the first mounting hole.

3. The miniature automatic water feeding tank with a float valve as claimed in claim 2, wherein the first swing rod is provided with a first installation shaft and a second installation shaft, the first installation shaft and the second installation shaft are respectively positioned at two sides of the first swing rod, the second installation shaft is positioned at the lower position of the first installation shaft, and the first swing rod is connected with the first installation hole through the first installation shaft.

4. The miniature automatic water feeding tank with a ball float valve according to claim 3, wherein the second swing rod is obliquely arranged, the upper end of the second swing rod is provided with a third installation shaft, the lower end of the second swing rod is provided with a fourth installation shaft, and the middle of the second swing rod is provided with a third installation hole; the second swing rod is connected with the second mounting hole through a third mounting shaft, the top of the floating ball is connected with the fourth mounting shaft through a hook, and the first swing rod is movably connected with the third mounting hole through the second mounting shaft.

5. The miniature automatic water feeding tank with a float valve as claimed in claim 4, wherein the third mounting hole is a strip-shaped movable hole.

6. The miniature automatic water feeding tank with a float valve as claimed in claim 1, wherein a pressing piece mounting opening is arranged in the middle of the first swing rod, a pressing piece buckle is arranged on one side of the pressing piece mounting opening, a pressing piece is mounted in the pressing piece mounting opening and buckled with the pressing piece buckle, and the silica gel pad is fixed at the top of the first swing rod through the pressing piece buckle.

7. The micro automatic water feeding tank with a float valve according to claim 1, wherein the volume of the bottle is 50-300ml.

8. The miniature automatic water feeding tank with a float valve as claimed in claim 1, wherein the inner bracket is provided with a vent hole which is communicated with the vent hole on the bottle cap.

9. The miniature automatic water feeding tank with a float valve as claimed in claim 1, wherein the bottle body is connected with the bottle cap through threads.

10. The miniature automatic water feeding tank with a float valve as claimed in claim 1, wherein the bottom of the air outlet is provided with an O-shaped ring fixing hole, a 0-shaped ring is arranged in the O-shaped ring fixing hole, the bottom of the water inlet is provided with a valve core fixing hole, the valve core is arranged in the valve core fixing hole, and the center of the valve core is provided with a water through hole.