KR101337926B1 - Fluid circulation system - Google Patents

Abstract

The present invention relates to a fluid circulation system having an air discharging vent pipe and, more particularly, to a fluid circulation system such as a home use boiler, a warm water mat and a cooled mat, etc. characterized by having an air discharging vent pipe for discharging air by connecting a water tank to one side of a discharging pipe for discharging fluids in the pump in order to prevent noise in a pump that may be generated by not discharging air generated in the pump due to non-smooth circulation of fluids. The fluid circulation system having an air discharging vent pipe according to the present invention comprises a water tank for storing fluids; a pump for circulating the fluids in the water tank; an inlet pipe for entering the fluids in the water tank to the pump; a discharging pipe for discharging the fluids to an object being circulated from the pump; a discharging tube which is connected to store the circulated fluids in the object being circulated in the water tank; and a vent pipe which connects the water tank to one side of the discharging pipe to discharge the air generated in the pump when the fluid circulation is overloaded in the object being circulated.

Description

Fluid circulation system with air exhaust pipe {FLUID CIRCULATION SYSTEM}

The present invention relates to a fluid circulation system having an air exhaust exhaust pipe,

More specifically, in a system for circulating a fluid such as a domestic boiler, a hot water mat, and a refrigerant, the pump does not discharge smoothly, so that no air is discharged from the pump to prevent noise from being generated in the pump. The present invention relates to a fluid circulation system having an exhaust pipe through which air is discharged by connecting one side of a discharge pipe through which a fluid is discharged to a water tank.

In the case of an electric mat using heat generated by electricity, the cost burden is increased due to excessive power usage, and a hot water mat for circulating hot water is in the spotlight.

For the same reason, a refrigerant that circulates cold water instead of using an air conditioner is also preferred by consumers for low cost.

The hot water mat or the coolant described above includes a fluid supply means (boiler or the like) incorporating a small pump to circulate the fluid.

In the circulation system for circulating the fluid using the pump as described above, the diameter of the conduit formed on the circulating object is small or long so that the fluid discharged from the pump cannot be smoothly flowed by the resistance of the conduit so that the air inside the pump There is a problem that noise is generated by the air when the pump is not discharged.

When the air in the pump is not discharged as described above, the noise caused by the air bubbles is not only increased, but the unstable flow of the fluid occurs in the pump by the air bubbles, thereby causing vibration, and the air bubbles in the pump. Cavitation occurs in the problem that reduces the durability of the pump.

Conventional technology for solving the above problems is disclosed in Korean Utility Model Publication No. 20-1998-016205 (published date 1998.06.25.),

The present invention relates to a heating water circulation structure of a domestic gas boiler, which includes a burner and a heat exchanger, and connects a heating pipe, on one side, installs a pressure gauge, and on the other side, an automatic air removing device, a waste prevention device, and a circulation pump. In the heating water circulation structure having a water storage tank, the pressure control device is connected to the heating pipe and connected to the water storage tank by the pressure control pipe, but the automatic air draining device is also a water storage tank. And pressure control pipe, and the heating pipe pressure control device forms a tank side connection pipe and a pipe side connection pipe, and installs a small and large blocking plate in the pipe side connection pipe by a compression spring and a tension spring, The through-hole is formed in the center so that the small-blocking plate is in close contact with each other, and the pressure regulator is connected to the suction part of the circulation pump based on the circulation pump of the heating pipe will be.

By the way, the above invention is provided with a separate air automatic bleeding device to discharge air during fluid circulation. The fluid supply means provided in the above-described hot water mat or coolant should be miniaturized due to the characteristics of the product, so that a separate air bleeding device is provided. If you do, there is a problem that can not miniaturize the product.

In addition to the hot water mat or the coolant, in order to maximize the utilization of space, in all systems circulating fluid such as a small household boiler or a small hot water boiler, the air is discharged to suppress the occurrence of noise and at the same time tend to be light and short In line with this, there is a demand for a miniaturized circulation system.

Accordingly, the present invention has been made to solve the above-mentioned problems,

When a load is generated in the flow of the fluid due to the circulation resistance of the circulation object, noise is generated because the air of the pump discharged with the fluid cannot be discharged, and the durability of the circulation object is prevented in order to reduce the durability due to the cavitation phenomenon in the pump. It is an object of the present invention to provide a fluid circulation system having an air exhaust exhaust pipe that directly connects an exhaust pipe through which an air is discharged from a discharge pipe connected to a pump for discharging fluid to a water tank so that air can be discharged through the exhaust pipe during fluid circulation. do.

In addition, the present invention is easy to manufacture through the structure simplified design of the circulation system, the first discharge pipe connected to the pump, the second discharge pipe having an upward bent and the first, the first, the first and the second so as to realize the light and short reduction of the fluid supply means An object of the present invention is to provide a fluid circulation system including an air discharge exhaust pipe in which a discharge pipe is formed by a coupling nib connecting two discharge pipes, and an exhaust pipe is coupled to the coupling nibble.

In addition, the present invention prevents fluid backflow to prevent a problem that the fluid is not circulated to the circulating object by flowing a large amount of fluid back to the exhaust tank when the flow of the fluid is not smooth by the resistance during the circulation of the circulating object to the exhaust pipe It is an object to provide a fluid circulation system having an air exhaust exhaust pipe comprising a member.

Furthermore, the present invention, in the tank in which the fluid is stored, foreign matter is introduced into the tank to circulate the fluid along with the foreign matter to block the conduit of the circulation object, or water vapor generated from the fluid is discharged into the fluid supply means to rust An object of the present invention is to provide a fluid circulation system provided with an airtight holding means at a contact portion of a cover covering a water tank so as to prevent a problem of deterioration of durability, such as slitting or failure.

In order to achieve the above object, the fluid circulation system having an air exhaust exhaust pipe according to the present invention is

A tank in which fluid is stored;

A pump for circulating the fluid in the tank;

An inlet pipe through which the fluid of the tank flows into the pump;

A discharge tube through which the fluid is discharged from the pump to the circulation object;

A discharge pipe connected to store the fluid circulated in the circulation object in the tank; And

And an exhaust pipe connecting the water tank at one side of the discharge pipe to discharge air generated from the pump when an overload occurs in the fluid circulation in the circulation object.

In addition, in the fluid circulation system having an air discharge exhaust pipe according to the invention, the discharge pipe is a first discharge pipe connected to the pump, a second discharge pipe connected to the circulation object and having an upward bent portion, and the first discharge pipe and And a coupling nibble connecting the second discharge pipe, wherein the exhaust pipe is coupled to one side of the coupling nibble.

And in the fluid circulation system having an air discharge exhaust pipe according to the present invention, the coupling nibble is characterized in that the fluid backflow prevention member is provided in the coupling projection coupled to the exhaust pipe.

Furthermore, in the fluid circulation system provided with the air exhaust pipe according to the present invention, the water tank includes a receiving portion containing the fluid and a cover covering the upper portion of the receiving portion, and the airtight holding means is provided at the contact portion of the cover and the water tank. It is characterized by that.

The fluid circulation system having an air exhaust pipe according to the present invention introduces an air exhaust pipe directly connected to a discharge pipe of a pump and a water tank, and is generated due to the air generated in the pump not being discharged together with the fluid by the resistance of the circulation object. Noise can be suppressed, and cavitation in the pump can be prevented to prevent failure and increase durability.

In addition, the fluid circulation system having an air discharge exhaust pipe according to the present invention is such that the exhaust pipe is coupled to a second discharge pipe having a first discharge pipe and an upward bent portion and a coupling nibble connecting the first and second discharge pipes. As the fluid is discharged downward, air can be automatically discharged to the exhaust pipe without a separate device, so that the fabrication and assembly are very easy through the structure simplification, and further miniaturization of the fluid supply means of the fluid circulation system can be realized.

In addition, the fluid circulation system having an air discharge exhaust pipe according to the present invention can prevent a large amount of fluid flow back through the exhaust pipe by introducing an exhaust pipe having a fluid backflow prevention member to prevent the fluid circulation efficiency of the entire circulation system from being lowered. .

Furthermore, the fluid circulation system having the air exhaust pipe according to the present invention introduces a gastight holding means to the cover covering the tank in which the fluid is stored, so that foreign matter is introduced into the tank, and the fluid is circulated with the foreign material, thereby closing the pipeline of the circulation object. It is possible to prevent the increase in resistance or increase resistance, and to prevent water vapor or cold air generated from the fluid stored in the tank, and the like flowing out into the fluid supply means to prevent rust and failure of each component from deteriorating durability.

1 is an embodiment of a hot water mat applying a fluid circulation system according to the present invention.
Figure 2 is an internal projection and enlarged view of the fluid supply means of the fluid circulation system according to the present invention.
3 is a cross-sectional view of a joint assembly of a fluid circulation system according to the present invention.
Figure 4 is a cross-sectional view showing the airtight holding means of the fluid circulation system according to the present invention and a sectional exploded perspective view and a schematic cross-sectional view showing a fluid backflow prevention member.

The present invention may be modified in various ways and may have various forms, and thus embodiments (or embodiments) will be described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In addition, in the drawings, the components are exaggerated in size (or thickness), in size (or thickness), in size (or thickness), or in a simplified form or simplified in view of convenience of understanding. It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

 In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

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 to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

In describing a fluid circulation system having an air exhaust pipe according to the present invention, a non-strict approximate direction reference is specified with reference to FIG. 4 for the sake of convenience. The right and left and the flow direction of the fluid for each of the components for convenience of description in order to explain the direction so as to explain the nature of the nature should not be damaged by reference.

The fluid circulation system according to the present invention described below represents a circulation system applied to the hot water mat for convenience of description, but the circulation object is not only a hot water mat, but also a refrigerant, a household boiler, and the like to operate the fluid. Of course, the fluid circulation system of the present invention can be applied to all products that achieve the object by circulating, and the fluid is also not limited to water.

Hereinafter, a fluid circulation system having an air discharge exhaust pipe according to the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the present invention provides all fluid circulation systems including a supply means 200 for supplying a fluid, and a circulating object 300 through which the fluid is circulated by supplying the fluid from the supply means 200. Can be applied.

The circulation object 300 has a fluid supply part 311 and a fluid discharge part 312 and has a fluid circulation part 310 connected to the fluid supply part 311 and the fluid discharge part 312 to circulate fluid. .

As shown in FIG. 1, the fluid circulation part 310 may be formed as a conduit connected to a pipe such as a hose.

In addition, the supply means 200 functions as a kind of small boiler to heat the fluid to circulate the fluid along the conduit of the circulation object 300.

To this end, as shown in FIG. 2, the present invention includes a water tank 210 in which the fluid is stored and a pump 230 for circulating the fluid in the water tank 210.

The tank 210 includes a cover 211 having a reservoir 212 (see FIG. 4) in which fluid is stored and covering the reservoir 212.

The fluid supply method to the water tank 210 may be made in various ways, as shown in FIG. 2, the present invention includes a storage reservoir coupling portion 219 at the cover 211 to form a separate fluid reservoir (not shown). It can be installed and supplied with fluid.

Furthermore, although not shown in the drawing, a method of receiving fluid by being connected to commercial water in place of the reservoir coupling unit 219 is also possible.

In addition, the bottom surface of the water tank 210 may include a mounting portion 214 on which a heating means for heating the fluid is mounted.

In addition, as described above, according to the application target of the circulation system of the present invention, without being provided with a separate heating means, it is a matter of course that the heated fluid can be directly supplied to the tank 210 and stored.

One side of the water tank 210 is provided with an inlet pipe 220 for discharging the fluid to the pump 230, that is, the fluid flows into the pump 230 from the water tank 210, the pump 230 ) Circulates the fluid by discharging the introduced fluid to the circulation object 300.

The pump 230 may be variously formed, such as a pump 230 having a known DC motor or a pump 230 having a BLDC motor, and it is described that fluid is introduced therein, but the pump 230 is provided inside the pump 230. After absorbing the fluid stored in the water tank 210 through the rotation of the impeller to discharge the fluid using the rotating force of the impeller.

For this purpose, the pump 230 and the fluid supply part 311 of the circulation object 300 are connected to each other by a discharge tube 240.

In the present invention, the discharge pipe 250 is connected to the fluid discharge portion 312 of the circulating object so that the fluid circulated through the circulating object 300 is stored in the tank 210 again.

The present invention can be applied to the movable fluid supply means 200 and the fluid circulation object 300, such as hot water mat, the pipes of the supply means 200 and the circulation object 300, such as pipes formed during transport and unused In order to facilitate desorption, it is preferable to further include a joint assembly 100 connecting the discharge pipe 240 and the discharge pipe 250 and the supply part 311 and the discharge part 312 of the circulation object 300, respectively. Do.

The joint assembly 100 is a socket member 110 to which the discharge pipe 240 and the discharge pipe 250 of the supply means 200 are coupled, and is formed to be detachably connected to the socket member 110 and the circulation object. The socket member 110 is disposed between the fitting member 120 coupled to the 300 and the socket member and the fitting member so that the residual water remaining in the pipeline when the joint assembly 100 is separated flows out to damage the floor or the beds. It may be made to include an on-off valve 130 that can open and close).

In the present invention, as shown in FIG. 4, the discharge pipe 240 has a first discharge pipe 241 connected to one side of the pump 230, and one side connected to the circulation object 300 upwards in the center thereof. And a second nibble 243 having a bent portion 242A and a coupling nib 243 that interconnects the other side of the first discharge tube 241 and the other side of the second discharge tube 242.

Since the second discharge pipe 242 has an upward bent portion 242A, the first discharge pipe 241 is a fluid discharge part of the second discharge pipe 242, that is, the socket member 110 of the joint assembly. By being located above the coupling portion with), when the flow of the fluid in the circulation object 300 is not smooth it can be prevented by the gravity flow back in the opposite direction of the discharge of the fluid.

When the fluid is circulated due to the driving of the pump 230, air bubbles are generated by the rotation of the impeller. The generated air circulates the circulation object 300 together with the fluid and is discharged to the water tank 210. do.

In this case, the width of the conduit 310 provided in the circulation object 300 is small or the length is long, so that a resistance force against the fluid circulation is generated, thereby increasing the load.

In this case, even though the fluid is not smooth in the flow of the fluid, the circulation may be made by the discharge pressure of the pump 230,

The air contained in the fluid has a characteristic of rising by buoyancy in the mixed state with the fluid. Therefore, if the fluid does not flow smoothly, the air is not discharged and remains in the conduit of the circulation object 300 to generate a cavity. Not only can it impede the circulation of fluids and reduce the efficiency achieved by fluid circulation,

There is a problem that the air that can not be discharged to stay in the pump 230, the noise may be generated by the rotation disturbance by the air bubbles when the impeller rotates.

In order to solve the non-air discharge problem, the present invention is directly connected to the water tank 210 at one side of the discharge pipe 240, the air generated by the pump 230 when the overload occurs in the fluid circulation in the circulation object 300 It comprises an exhaust pipe 260 is discharged.

In addition, the present invention includes the fluid when the fluid flows downward toward the second discharge pipe 242 via the first discharge pipe 241 and the coupling nibble 243 by the fluid discharge pressure of the pump 230. The air does not flow downward into the second discharge pipe 242 by buoyancy, and air is naturally discharged to the exhaust pipe 260 under the influence of the discharge pressure of the first discharge pipe 241.

Therefore, the present invention does not need to provide a separate air discharge device is suitable for the miniaturization of the fluid circulation system, and can be easily manufactured and assembled through the simplified structure to improve workability and reduce the manufacturing cost.

In particular, in the present invention, when the flow of the fluid is not smooth in the state that the fluid is filled in the discharge pipe 240 due to the overload of the pipeline of the circulation object 300, the fluid with the air through the exhaust pipe 260 Since it is recycled to the storage unit of the water tank 210, it is possible to prevent failure due to the overload of the pump 230, to prevent the cavitation phenomenon in the pump 230 to increase the durability.

And the coupling nibble 243 has a female coupling portion or a water coupling portion for coupling with the first discharge pipe 241 and the second discharge pipe 242, the first discharge pipe 241 and the first The two discharge pipes 242 may be formed to have a male coupling portion or a female coupling portion corresponding thereto.

However, when the exhaust pipe 260 is provided with a water coupling portion coupled to the coupling nibble 243, the exhaust pipe 260 may interfere with the flow path of the fluid to lower the discharge pressure of the fluid. Coupling protrusion 243A for coupling with the exhaust pipe 260 is provided and the exhaust pipe 260 preferably comprises a corresponding arm coupling portion 260A corresponding to the coupling protrusion (243A).

The coupling protrusion 243A may not only be formed at the same height as the first discharge pipe 241, but also formed at the uppermost side of the body of the coupling nibble 243 to the water tank 210 when the fluid is discharged. It is desirable to adjust the amount of fluid to be recycled.

In addition, the exhaust pipe 260 of the present invention, as described above, may prevent the overload of the pump 230 through the recirculation of the fluid when the flow of the fluid is not smooth, that is, when the recirculation of the fluid is performed in large quantities, that is, the fluid When a large amount of backflow of the solution may occur, a problem may be violated to achieve the purpose through the circulation of the fluid.

In order to solve the above problems, the present invention includes a fluid backflow prevention member 249.

The fluid backflow prevention member 249 is preferably provided inside the coupling protrusion 243A.

The backflow preventing member 249 is for preventing excessive backflow of the fluid, thereby selectively opening and closing the recirculation passage 243B formed on the engaging protrusion 243A to ensure constant air discharge and at the same time, the backflow of the fluid is a predetermined amount or more. It is preferable that it is not generated.

Therefore, the backflow prevention member 249 forms a hollow portion 249B through which air can be discharged in communication with the upper side, and blocks the blocking portion 249A for selectively shielding the recirculation passage 243B of the coupling protrusion 243A. It can be made, including.

And the backflow prevention member 249 is made of a material having a buoyancy against the fluid to automatically block the backflow of the fluid in accordance with the water level,

The coupling protrusion 243A includes a pair of guide portions 243C for restraining and guiding the backflow preventing member 249,

The backflow prevention member 249 may include a rail unit 249C coupled to the pair of guide units to move up and down and slide in response to the buoyancy of the fluid.

That is, as shown in B of Figure 4, the backflow prevention member 249 is located at the lowermost side of the guide portion by its own weight when the flow of the fluid (W) smoothly to ensure the air discharge,

When the fluid level is not smooth and the fluid W is filled inside the second discharge pipe 242 and the water level rises, the non-return member 249 follows the rail part 249C by buoyancy. While rising, the blocking portion 249A shields the recirculation passage 243B of the coupling protrusion 243A to prevent the fluid from flowing back, and at the same time, the air passes through the upper hollow portion 249B of the blocking portion 249A. May continue to be discharged.

When the fluid level of the second discharge pipe 242 is close to the full water level, the fluid is not circulated due to the abnormality of the circulation object 300. Since this may occur or the pipes such as the discharge tube 240 may be damaged, it is more preferable to recycle the fluid filled in the discharge tube 240 to the water tank 210.

To this end, the backflow prevention member 249 includes a stopper (not shown) for limiting the height of displacement of the fluid to the level of the fluid to limit the fluid blocking function of the fluid by the stopper at the full water level, and the fluid through the hollow portion It can be made to be recycled.

In FIG. 4B, the fluid is shown to have a certain level in order to express the backflow preventing member 249 which is automatically displaced according to the level of the fluid. However, this is for convenience of description.

As described above, since the fluid is continuously flowed in the discharge tube 243 in a state where a certain amount of fluid is filled, the backflow preventing member 249 continuously adjusts the air discharge and the backflow amount of the fluid while the position is continuously displaced. Have the ability to

A lower portion of the backflow preventing member 249 is preferably formed with a passage (not shown) through which the fluid can flow downward.

Position displacement of the non-return member 249 and the size of the hollow portion 249B may be variously changed according to the capacity of the pump or the size of the discharge pipe conduit, as long as those skilled in the art to which the present invention belongs. Can be predicted and reproduced.

In addition, the connection portion of the water tank 210 and the exhaust pipe 260 is provided with a detection sensor (not shown) capable of detecting a certain amount of fluid flow to issue an alarm signal when the recirculation of the fluid is a large amount and use of the circulation system Can be stopped.

Subsequently, the present invention may include an airtight holding means 213 to secure the watertightness of the cover 211 covering the water tank 210 and the storage unit, as shown in the enlarged bottom left view of FIG. 4.

In more detail with respect to the hermetic holding means 213, the hermetic holding means 213 is composed of a waterproof member 213B, a packing layer 213A and a packing strip 213C, the water tank 210 The waterproof member 213B is provided at the contact portion between the water pressure portion 210A and the pressure portion 211A of the cover 211.

The waterproof member 213B is composed of an adhesive tape and silicon having an adhesive force so as to be coupled to the water pressure unit 210A and the pressure unit 211A.

In addition, a packing layer 213A is provided between the waterproof members 213B. The packing layer 213A is provided at the center of the waterproof member 213B. It is difficult to pass through the packing layer 213A by having a viscosity due to the adhesive force of the waterproof member 213B generated on the strip 213C. It is difficult to pass through 213A), so that water, moisture, or dust can be blocked more effectively than a waterproof and moistureproof device formed by inserting only a general rubber packing or injecting silicon only.

 In addition, the adhesive tape constituting the waterproof member 213B may use an adhesive tape having adhesiveness on one side or both sides, and it is preferable that the adhesive tape is formed of an adhesive tape constituting a cushion.

Since the cover 211 and the water tank 210 should be configured to be easy to open and close, the cover 211 and the water tank 210 are provided with a waterproof member 213B having adhesive strength on both sides thereof, and the waterproof A packing layer 213A is formed on the member 213B, and the cover 211 is provided with a waterproof member 213B made of an adhesive tape having an adhesive force on one surface thereof to open and close the cover 211 and the water tank 210. It is desirable to facilitate.

In addition, the airtight holding means 213 can increase the waterproof function by configuring the packing strip 213C, and even beginners can easily configure and manufacture the product, which can shorten the process of the product and lower the unit price. Can be secured.

 In addition, it is preferable that the packing layer 213A is made of a silicone resin, and is preferably made of foaming liquid or compressed foamed PVC (Formmax).

When the foaming liquid or the compressed foamed PVC is applied to the upper or lower surface of the waterproof member 213B with a material such as a silicone resin, the foam is hardened by being combined with the waterproof member 213B after a predetermined time and a predetermined thickness of the hardened portion is formed. This product has excellent ability to absorb external shocks, light weight and excellent cutting force, effectively improving product productivity.

In the above description of the present invention, the fluid circulation system having the air exhaust pipe having a specific shape and structure with reference to the accompanying drawings has been described mainly, but the present invention can be variously modified, changed and replaced by those skilled in the art. Modifications, changes and substitutions should be construed as falling within the protection scope of the present invention.

100: joint assembly 110: socket member
120: fitting member 130: on-off valve
200: fluid supply means 210: water tank
210A: hydraulic pressure section 211: cover
211A: Pressurization section 212: Storage section
213: confidentiality means 213A: packing layer
213B: Waterproof member 213C: Packing strip
214: heating means mounting portion 219: reservoir coupling portion
220: inlet pipe 230: pump
240 discharge tube 241 first discharge tube
242: second discharge pipe 242A: upward bent portion
243: coupling nibble 243A: coupling protrusion
243B: Recirculation passage 243C: Guide part
249: fluid backflow prevention member 249A: blocking portion
249B: Hollow Section 249C: Rail Section
250: discharge pipe 260: exhaust pipe
260A: counterpart arm
300: circulating object 310: fluid circulation
311: fluid supply part 312: fluid discharge part

Claims (4)

A tank in which fluid is stored;
A pump for circulating fluid in the tank;
An inlet pipe through which the fluid of the tank flows into the pump;
A discharge tube through which the fluid is discharged from the pump to the circulation object;
A discharge pipe connected to store the fluid circulated in the circulation object in the tank; And
The exhaust pipe is connected to one side of the discharge pipe and the exhaust pipe is discharged from the air generated in the pump when the overload occurs in the fluid circulation in the circulation object;
The discharge pipe and the first discharge pipe connected to the pump;
A second discharge pipe connected to the circulation object and having an upward bend;
It includes a coupling nibble connecting the first discharge pipe and the second discharge pipe,
And the exhaust pipe is coupled to one side of the coupling nibble.
The method of claim 1,
The coupling nibble is a fluid circulation system having an air discharge exhaust pipe, characterized in that the fluid backflow prevention member is provided in the coupling projection coupled to the exhaust pipe.
3. The method of claim 2,
The non-return member is a fluid circulation system having an air exhaust exhaust pipe, characterized in that the upper portion forms a hollow portion through which the air can be discharged in communication, and comprises a blocking portion for selectively shielding the recirculation passage of the engaging projection. The method according to any one of claims 1 to 3,
The tank includes a receiving portion containing the fluid, and a cover covering the upper portion of the receiving portion,
A fluid circulation system having an air exhaust exhaust pipe, characterized in that an airtight holding means is provided at the contact portion of the cover and the water tank.

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