KR102465359B1 - Valve-cap assembly for reserve tank of heat exchanger - Google Patents

Abstract

The present invention relates to a valve cap assembly for a reserve tank of a heat exchanger, and in the valve cap assembly for a reserve tank (100) of a heat exchanger, the valve cap assembly opens and closes the reserve tank (100) a cap 210, a tube connected to the lower part of the cap 210, and a hollow cap connection part 230, and a valve 290 that is partially inserted into the hole to open and close the hollow according to the level of the heat exchange fluid. ), and a sub-hole 234 opened and closed by the valve 290 is formed through the lower surface of the cap connection part 230 .

Description

Valve-cap assembly for reserve tank of heat exchanger}

The present invention relates to a valve cap assembly for a reservoir tank of a heat exchanger, and more particularly, to a heat exchanger capable of improving the outflow of coolant by removing a valve closing phenomenon in a reservoir tank in a process of injecting coolant into a coolant tank of a vehicle. It relates to a valve cap assembly for a reserve tank.

When heat generated during engine operation of a vehicle is conducted to cylinder heads, pistons, valves, etc., the temperature of the parts to which the heat is conducted increases excessively, and the strength of the parts may decrease due to thermal expansion or deterioration. Accordingly, engine life may be shortened, and a combustion state may be deteriorated, and thus knocking or premature ignition may occur, resulting in a decrease in engine output.

In addition, when the engine is cooled incompletely, the oil film on the inner circumferential surface of the cylinder is broken, and the lubricating function is deteriorated, and the engine oil is deteriorated, causing abnormal wear of the cylinder. Accordingly, a phenomenon in which the piston is fused to the inner wall surface of the cylinder may occur.

In order to solve this problem, a water-cooled chiller is usually applied.

The water-cooled cooling device cools engine parts by circulating coolant through a water pump to circulate a cylinder block and a cylinder head, and may include a radiator, a cooling fan, a water temperature regulator, and the like to dissipate heat and reuse the coolant.

Inside the radiator, a volume change occurs due to a temperature change while the coolant flows, and accordingly, the internal pressure may increase excessively or there may not be enough coolant to cool the engine.

Therefore, a separate reservoir tank is connected and used for smooth supply of cooling water, and an example of the reservoir tank is disclosed in Korean Patent Publication No. 2015-0017401.

However, such a conventional reservoir tank does not have a method for measuring the water level in the reservoir tank, so there is no way to know when there is not enough cooling water in the reservoir tank, which is inconvenient.

In order to solve this problem, there are cases in which a gauge capable of measuring the amount of cooling water is attached to the valve of the reservoir tank. However, in the coolant injection process during the vehicle assembly process, the valve is closed before the coolant is completely injected, so excessive time is required to inject the coolant, or when the coolant injection gun is removed, the coolant leaks into the assembly hole due to an increase in internal pressure.

Korean Patent Publication No. 2015-0017401 (published on February 17, 2015)

An object of the present invention is to provide a valve cap assembly for a reservoir tank of a heat exchanger capable of improving the outflow of coolant by removing a valve closing phenomenon in a reservoir tank in a process of injecting coolant into a coolant tank of a vehicle.

In order to achieve the above object, in the valve cap assembly for the reserve tank 100 of the heat exchanger of the present invention, in the valve cap assembly for the reserve tank 100 of the heat exchanger, the valve cap assembly includes the reserve tank ( 100), a cap 210 connected to the lower part of the cap 210, and a hollow cap connection part 230, a part of which is inserted into the hollow to open and close the hollow according to the level of the heat exchange fluid It includes a valve 290, and a sub-hole 234 opened and closed by the valve 290 is formed through the lower surface of the cap connection part 230.

The sub-hole 234 is characterized in that it is provided with a plurality.

The lower end of the cap connection part 230 is blocked, the lower end protrudes inward to form a support jaw 232, and the hollow is formed on the support jaw 232.

The sub hole 234 is characterized in that it is disposed between the inner circumferential surface of the cap connection part 230 and the support jaw 232 .

The cap connection part 230 is concave from the outer circumferential surface of the lower end and is spaced apart from the valve insertion part 230b into which the valve 290 is inserted, and is spaced apart from the valve insertion part 230b and protrudes from the outer circumferential surface to form the valve 290. It further includes a hook (230a) supported.

The valve assembly includes a cylindrical valve case 250 coupled to the valve insertion portion 230b and the hook 230a, and a hook protruding from an inner circumferential surface of the valve case 250 and inserted into the valve insertion portion 230b. (250b) and the valve 290 inserted inside the valve case 250 to open and close the hollow.

The sub-hole 234 is characterized in that it is located inside the outer diameter of the gasket 296.

The valve 290 is formed in a cylindrical shape protruding from one surface of the opening and closing part 294 for opening and closing the hollow, a spherical insertion protrusion 292 inserted into the support jaw 232, and the opening and closing part 294. It is inserted between the protrusion support part 293 supporting the insertion protrusion 292, the end of the cap connection part 230 and the opening and closing part 294 to seal the gap between the opening and closing part 294 and the support jaw 232. Gasket 296 is included.

The insertion protrusion 292 includes a cutout groove cut along the longitudinal direction of the protrusion support part 293 .

When the insertion protrusion 292 is inserted into the support jaw 232, the width of the incision groove is narrowed by an external force.

The open state of the hollow means that the opening/closing part 294 and the gasket 296 are spaced apart from the end of the cap connection part 230 while the insertion protrusion 292 is held by the supporting jaw 232. to be characterized

The closed state of the hollow is characterized in that the opening/closing part 294 and the gasket 296 close the end of the cap connection part 230 .

The closed state of the hollow is characterized in that the coolant flows backward from the radiator 10 and the coolant in the reserve tank 100 lifts the opening/closing part 294 .

The valve case 250 is characterized in that it covers part or all of the opening/closing part 294, the gasket 296, and the protrusion support part 293.

The valve case 250 further includes a cutout 250a in which a portion of an outer circumferential surface is cut.

The valve cap assembly for the reservoir tank of the heat exchanger according to an embodiment of the present invention has an effect of improving the outflow of the coolant by eliminating a valve closing phenomenon in the reservoir tank in the process of injecting the coolant into the coolant tank of the vehicle.

1 is a view showing an installation state of a cooling water tank for a cooling device according to an embodiment of the present invention;
2 is a view showing a cap and valve structure according to the cooling water tank of FIG. 1;
3 is an enlarged cross-sectional view of a main part according to the valve structure of FIG. 2;
4 is a view showing an open state of a valve according to the cooling water tank of FIG. 2;
FIG. 5 is a view showing a closed state of valves of the cooling water tank of FIG. 2 .

Hereinafter, a valve cap assembly for a reserve tank of a heat exchanger according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a view showing an installation state of a cooling water tank for a cooling device according to an embodiment of the present invention, FIG. 2 is a view showing a cap and valve structure according to the cooling water tank of FIG. 1, and FIG. 3 is a view showing the valve of FIG. 2 It is an enlarged cross-sectional view of the main parts according to the structure. FIG. 4 is a view showing an open state of valves of the cooling water tank of FIG. 2 , and FIG. 5 is a view showing a closed state of valves of the cooling water tank of FIG. 2 .

As shown in FIGS. 1 to 3 , the cooling water tank for a cooling device according to an embodiment of the present invention is integrally or separately installed in the radiator 10, which is one of the components of the water-cooled cooling device. The cooling water tank is coupled to one side of the header of the radiator 10 by a connection hose 30 to supply cooling water to the radiator 10 or serve as a passage for cooling water drained from the radiator 10 .

The cooling water tank is largely composed of a reserve tank 100 in which cooling water is stored and a cap assembly 200 that opens and closes the reserve tank 100 . The valve cap assembly 200 includes a cap 210 inserted into the cooling water inlet 110, a cap connecting portion 230 connected to the cap 210, and a valve coupled to the cap connecting portion 230 to open and close according to the coolant level. It is configured to include an assembly and a gauge 270 for measuring the level of coolant. A connection hose 30 is coupled to one side of the reserve tank 100 .

The cap 210 is coupled to the cooling water inlet 110 provided at the top of the reservoir tank 100, and a tubular cap connection 230 is provided at the bottom of the cap 210. When the cap 210 is opened, a hollow is formed through and communicates with the cap connection part 230 .

The cap connector 230 has one end coupled to the cap 210 and the other end coupled to the valve assembly. At the other end of the cap connection part 230, a valve insertion part 230b for coupling the valve assembly when the valve assembly is coupled is concave from the outer circumferential surface. A hook 230a for holding the valve assembly is protruded from the outer circumferential surface on the upper side of the cap connection part 230 spaced apart from the valve insertion part 230b by a predetermined distance.

In addition, an end of the cap connection part 230 is blocked in a disk shape, and a sub hole 234 serving as a movement path of air is formed through the end of the disk shape (this will be described later). An end of the cap connection part 230 protrudes inward and is provided with a cylindrical supporting jaw 232 having a hollow. An insertion protrusion 292 of a valve assembly to be described later is inserted into the supporting jaw 232 .

The valve assembly includes a valve case 250 coupled to the cap connector 230 and a valve 290 installed inside the valve case 250 to open and close the support jaw 232 . The valve 290 is composed of an opening/closing portion 294, a protrusion support portion 293, and an insertion protrusion 292. In addition, a gasket 296 for watertightness between the opening and closing part 294 and the supporting jaw 232 is additionally provided.

The valve case 250 has a cylindrical shape and is coupled to the outside of the end of the cap connection part 230 in a form surrounding the end of the cap connection part 230 . On the inner circumferential surface of the valve case 250, a hook 250b held by the valve insertion portion 230b protrudes toward the valve insertion portion 230b. The upper end of the valve case 250 is supported by the hook 230a of the cap connection part 230 and coupled to the cap connection part 230 while being inserted into the valve insertion part 230b. Since the opening/closing part 294 and the gauge 270 are inserted inside the valve case 250, an operating space in which the valve can stably operate may be provided regardless of the flow of cooling water.

A cutout 250a in which a portion of the outer circumferential surface is cut is provided on the outer circumferential surface of the valve case 250, and the periphery of the cutout 250a has an open shape. Since the periphery of the cutout 250a is open, when the water level rises while the valve assembly is inserted into the reserve tank 100, coolant flows into the valve case 250 through the open portion of the cutout 250a. (This will be discussed later).

The opening/closing part 294 has a disc shape having a predetermined thickness, and a protrusion support part 293 protrudes upward from the center of the disc.

The protrusion support part 293 has a cylindrical shape and is integrally formed with the opening/closing part 294 . An insertion protrusion 292 is integrally formed at an end of the protrusion support part 293 . Preferably, the protrusion support portion 293 has a length sufficient to allow the gasket 296 and the opening/closing portion 294 to be spaced apart from the end of the cap connection portion 230 while the insertion protrusion 292 is caught on the supporting jaw 232. do.

The insertion protrusion 292 has a spherical shape, and a cutout groove is formed at the center of the insertion protrusion 292 along the longitudinal direction of the protrusion support part 293 . Since the insertion protrusion 292 can be deformed toward the incision groove by the incision groove, the opening and closing portion 294 can be assembled by pressing the insertion protrusion 292 and inserting it into the support jaw 232 when assembling the opening and closing portion 294. Therefore, it is preferable that the diameter of the supporting protrusion 232 is formed to a diameter sufficient for the insertion protrusion 292 to pass through.

The gasket 296 has a ring shape and is inserted into the protruding support portion 293 of the opening/closing portion 294 to be seated on the upper portion of the opening/closing portion 294 . That is, the gasket 296 is disposed between the end of the cap connecting portion 230 and the opening/closing portion 294 in a state in which the insertion protrusion 292 is inserted into the supporting jaw 232 . The gasket 296 is watertight between the opening/closing part 294 and the end of the cap connection part 230 in the closed position of the valve.

The gauge 270 is integrally formed on the lower part of the valve case 250, and has a plurality of graduations for displaying the water level of the cooling water.

An operation of driving the valve will be described in more detail with reference to FIGS. 4 and 5 .

The volume of the coolant increases by about 3% or more depending on the temperature. In an environment where the engine is turned off due to a high temperature, the coolant flows back into the coolant tank through the radiator 10 and boils, which is the same noise as boiling noise. ) will occur.

When the temperature inside the radiator 10 is overheated and the volume increases significantly, the cooling water is drained into the cooling water tank as described above to prevent excessive increase in pressure inside the radiator 10 . The cooling water is automatically reversed and drained toward the cooling water tank having a relatively low pressure compared to the radiator 10 .

The cooling water tank is filled with cooling water of a predetermined capacity, and in this state, the valve assembly is in a state where the insertion protrusion 292 is caught on the supporting jaw 232 . At this time, the opening/closing part 294 and the gasket 296 are in a state of being spaced apart from the end of the cap connection part 230, and this state is defined as a hollow open state by the valve 290.

As shown in FIG. 4 , when the high-temperature cooling water flows backward from the radiator 10 and the water level in the cooling water tank rises, the cooling water overflows to the lower side of the cutout 250a. As cooling water flows into the lower side of the cutout 250a, the opening/closing portion 294 rises toward the end of the cap connecting portion 230 by water pressure. When the opening/closing part 294 is lifted while the high-temperature cooling water boils, the gasket 296 and the opening/closing part 294 close the end of the cap connection part 230. It is defined as a closed state, which is shown in FIG. 5 .

Although the water level in the reservoir tank 100 rises, since the valve is closed, the volume of the reservoir tank 100 is limited, so the pressure inside the reservoir tank 100 gradually increases as the water level rises. When the internal pressure of the reserve tank 100 increases, the inflow noise generated when the coolant flows into the reserve tank 100 can be minimized.

The above-described sub-hole 234 is closed by the gasket 296 in the hollow closed state to prevent fluid from communicating from the inside of the valve 290 to the inside of the cap connection part 230, and is opened again in the hollow open state. .

The air filled in the lower side of the cutout 250a moves in the direction A between the insertion protrusion 292 and the support jaw 232 in the open state of the valve 290 . At this time, since the distance between the insertion protrusion 292 and the supporting jaw 232 is narrower than the distance between the protrusion supporting part 293 and the supporting jaw 232, the cross-sectional area of the air movement path is locally narrowed, and the flow rate of the corresponding part is fast. will lose When the static pressure decreases as the flow rate in the corresponding region increases, a phenomenon in which the valve 290 is closed due to the pressure difference may occur. When additional injection of coolant is required during a coolant injection process during a vehicle assembly process or during vehicle operation, if the valve 290 is closed before the coolant is completely injected, there is a problem in that the coolant injection takes a long time. In addition, when an injection gun for injecting cooling water is removed, a problem in that cooling water leaks into the injection port due to pressure may occur.

In order to solve this problem, the above-described sub-hole 234 is formed through the circular plate surface of the end of the cap connection part 230 .

A plurality of sub-holes 234 are formed through the end plate surface of the cap connection part 230, and the position is disposed between the inner circumferential surface of the cap connection part 230 and the supporting jaw 232. In addition, the sub-hole 234 is preferably located inside the outer diameter of the gasket 296 to maintain a sealing state by the gasket 296 in the closed state of the valve 290 .

When the sub-hole 234 is provided at the above-described position, a movement path through which air can escape is added in addition to the existing insertion protrusion 292 and the support jaw 232, so the flow rate of air is reduced. Since the decrease in static pressure is minimized while the flow rate of air decreases, closing of the valve 290 due to a sudden increase in flow rate can be prevented.

Therefore, during the process of injecting coolant during the assembly process of a vehicle or when additionally injecting coolant during vehicle operation, process time delay due to valve closing and leakage of fluid are prevented.

In the above embodiments, it has been described that a gauge capable of measuring the level of the cooling water is provided, but the level sensor may be provided to determine the level of the cooling water.

Alternatively, a scale may be displayed on the outside of the reservoir without a separate gauge or sensor, and the water level of the coolant may be determined from the outside of the reservoir by applying a material that can be seen inside to the scale.

One embodiment of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can improve and change the technical idea of the present invention in various forms. Therefore, as long as these improvements and changes are obvious to those skilled in the art, they will fall within the scope of the present invention.

10: radiator 100, 100': reserve tank
200: cap assembly 210: cap
230: cap connection 232: support jaw
234: sub hole 250: valve case
294: opening and closing part 296: gasket

Claims (15)

In the valve cap assembly for the reserve tank 100 of the reserve tank 100 heat exchanger,
The valve cap assembly,
A cap 210 for opening and closing the reserve tank 100;
A tube connected to the lower part of the cap 210 and a hollow cap connection part 230,
A valve 290 partially inserted into the hollow to open and close the hollow according to the level of the heat exchange fluid,
The valve cap assembly for the reserve tank of the heat exchanger, characterized in that the sub-hole 234 opened and closed by the valve 290 is formed through the lower surface of the cap connection part 230. According to claim 1,
The valve cap assembly for the reserve tank of the heat exchanger, characterized in that the sub-hole 234 is provided in plurality. According to claim 2,
The lower end of the cap connection part 230 is blocked, the lower end protrudes inward to form a support jaw 232, and the valve for the reserve tank of the heat exchanger, characterized in that the hollow is formed in the support jaw 232 cap assembly. According to claim 3,
The sub-hole 234 is a valve cap assembly for a reserve tank of a heat exchanger, characterized in that disposed between the inner circumferential surface of the cap connection part 230 and the support jaw 232. According to claim 4,
The cap connection part 230 is concave from the outer circumferential surface of the lower end and is spaced apart from the valve insertion part 230b into which the valve 290 is inserted, and is spaced apart from the valve insertion part 230b and protrudes from the outer circumferential surface to form the valve 290. The valve cap assembly for the reserve tank of the heat exchanger further comprising a hook (230a) supported. According to claim 5,
The valve assembly includes a cylindrical valve case 250 coupled to the valve insertion part 230b and the hook 230a, an opening and closing part 294 inserted into the valve case 250 to open and close the hollow, A valve cap assembly for a reserve tank of a heat exchanger including a gasket 296 inserted between the end of the cap connection part 230 and the opening and closing part 294 to seal the space between the opening and closing part 294 and the support jaw 232. . According to claim 6,
The valve cap assembly for the reserve tank of the heat exchanger, characterized in that the sub-hole 234 is located inside the outer diameter of the gasket 296. According to claim 7,
The valve assembly includes a hook 250b protruding from an inner circumferential surface and inserted into the valve insertion portion 230b, a spherical insertion protrusion 292 inserted into the support jaw 232, and one surface of the opening/closing portion 294. The valve cap assembly for the reserve tank of the heat exchanger further includes a protrusion support part 293 protruding from the protrusion in a cylindrical shape and supporting the insertion protrusion 292. According to claim 8,
The insertion protrusion 292 includes a cutout groove cut along the longitudinal direction of the protrusion support part 293, and the valve cap assembly for the reserve tank of the heat exchanger. According to claim 9,
The insertion protrusion 292 is a valve cap assembly for a reserve tank of a heat exchanger, characterized in that the width of the cut groove is narrowed by an external force when inserted into the support jaw 232. According to claim 10,
The open state of the valve assembly is a state in which the opening/closing part 294 and the gasket 296 are spaced apart from the end of the cap connection part 230 while the insertion protrusion 292 is held by the supporting jaw 232. Valve cap assembly for the reserve tank of the heat exchanger, characterized in that. According to claim 11,
The valve cap assembly for the reserve tank of the heat exchanger, characterized in that the closed state of the valve assembly is a state in which the opening and closing part 294 and the gasket 296 close the end of the cap connection part 230. According to claim 12,
The closed state of the valve assembly is a state in which cooling water flows backward from the radiator 10 and the cooling water in the reserve tank 100 lifts the opening and closing portion 294. Valve cap for the reserve tank of the heat exchanger, characterized in that assembly. According to claim 13,
The valve cap assembly for the reserve tank of the heat exchanger, characterized in that the valve case 250 covers a part or all of the opening and closing part 294, the gasket 296, and the protrusion support part 293. According to claim 14,
The valve cap assembly for the reserve tank of the heat exchanger, wherein the valve case 250 further includes a cutout 250a in which a portion of an outer circumferential surface is cut.

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