WO2015152450A1 - Expansion tank-integrated heat exchanger and boiler including same - Google Patents

Abstract

The present invention relates to an expansion tank-integrated heat exchanger and a boiler including the same and, particularly, to an expansion tank-integrated heat exchanger and a boiler including the same, the expansion tank-integrated heat exchanger having a hot water supplier and an expansion tank integrally included in one heat exchanger casing. Further, the present invention relates to an expansion tank-integrated heat exchanger and a boiler including the same, which can guarantee the reliable operation of a diaphragm and simultaneously prevent the diaphragm constituting the expansion tank from being deformed even in long-term use thereof.

Description

Expansion tank integrated heat exchanger and boiler including the same

The present invention relates to an expansion tank integrated heat exchanger and a boiler including the same, and more particularly, to an expansion tank integrated heat exchanger and a boiler including the hot water supply and the expansion tank integrally provided in one heat exchanger casing.

In addition, the present invention relates to an expansion tank integrated heat exchanger and a boiler including the same, which prevents deformation of the diaphragm constituting the expansion tank even during long time use and ensures the reliable operation of the diaphragm.

In general, when the temperature of the heating water circulating in the boiler pipe increases, the volume increases, so that the pressure inside the pipe increases, so it is necessary to use a pressure expansion tank accommodating it.

Therefore, since the boiler must be provided with the pressure expansion tank separately in addition to the heat exchanger for supplying hot water, there is a problem in that the manufacturing is difficult and the unit price increases.

Accordingly, as shown in FIG. 1, Korean Laid-Open Patent Publication No. 2012-0089171 discloses a first casing 110a having a gas chamber inside and a second casing 110b having a water chamber inside so as to integrally provide a hot water heat exchanger and an expansion tank. The water chamber and the gas chamber were partitioned by joining to face each other and inserting the compartment plate 150 therebetween.

In addition, an elastic bag 130a is installed inside the first casing 110a filled with gas, and a heat exchanger tube 140a for hot water supply is assembled inside the second casing 110b through which the heating water flows, and the compartment plate ( In 150, a communication hole 151 through which heating water passes is formed.

Therefore, the hot water is supplied by heating the direct water of the heat exchanger tube 140a for hot water supply by the high temperature heating water passing through the second casing 110b, and the heating water is increased when the temperature of the heating water is increased to increase the volume. It flowed into the second casing 110b through the communication hole 151 of the compartment plate 150 to absorb the shock.

However, in the prior art as described above, a portion of the elastic bag 130a is prevented from passing through the communication hole 151 to the other side while the communication hole 151 formed in the compartment plate 150 has a large size. There was no means to.

Therefore, as shown in FIG. 2, when the elastic bag 130a is expanded, the communication hole 151 of the compartment plate 150 is pushed in and protrudes to the opposite side, so that deformation occurs in the elastic bag 130a when the state is maintained for a long time.

In addition, as described above, when the communication hole 151 of the compartment plate 150 is blocked, the heating water supplied to the water chamber of the second casing 110b is pushed toward the gas chamber side of the first casing 110a while pushing the expanded elastic bag 130a. There was a problem that the function of the expansion tank is lost because it does not leak.

The present invention has been proposed to solve the problems as described above, to provide an expansion tank integrated heat exchanger and a boiler including the hot water supply and expansion tank integrally provided in one heat exchanger casing.

In addition, an object of the present invention is to provide an expansion tank integrated heat exchanger and a boiler including the same, which prevents deformation of the diaphragm constituting the expansion tank even when used for a long time and ensures reliable operation of the diaphragm.

To this end, the expansion tank integrated heat exchanger according to the present invention and the boiler including the same has a water chamber in which the heating water flows inside, the heating water inlet through which the heating water flows, the heating water outlet through which the heating water is discharged, and the direct water A water chamber casing including a direct water inflow port introduced thereto and a hot water outlet through which hot water is discharged; A gas chamber casing which is assembled to face the water chamber casing to form a heat exchanger casing and has a gas chamber inside; A diaphragm which is assembled at a boundary between the water chamber and the gas chamber in the heat exchanger casing, and a plurality of heating water flow holes are collectively formed so that the heating water is dispersed and introduced into a specific region of one side; A hot water heat exchanger tube assembled between one side of the diaphragm and the water chamber, the inlet of one end of which is fitted into a direct inlet of the water chamber casing, and the outlet of the other end of the diaphragm inserted into a hot water outlet of the water chamber casing; And a diaphragm assembled between the other side of the diaphragm and the gas chamber, the diaphragm being expanded by the expansion gas filled in the gas chamber or compressed by the heating water introduced into the gas chamber through the heating water flow hole. do.

In this case, it is preferable that the first supporting jaw protrudes along the boundary line of the specific area on the bottom surface of the diaphragm in which the diaphragm is disposed.

In addition, it is preferable that a second support jaw protrudes between the heating water flow holes in the lower surface of the diaphragm.

In addition, the plurality of heating water flow holes are formed at regular intervals along the circumferential direction in the specific zone, and the boundary line of the specific zone is preferably formed in a circular shape.

In addition, it is preferable that at least one or more peeling protrusions protrude from the lower surface of the diaphragm in which the diaphragm is disposed.

In addition, an end of the diaphragm forms a curing to bend outward, an end of the gas chamber casing forms a curing to be inwardly bent, and an end of the diaphragm is bent outwardly between the curving of the diaphragm and the curing of the gas chamber casing. It is preferable to be assembled to.

On the other hand, the boiler according to the invention is characterized in that it comprises an expansion tank integrated heat exchanger as described above.

In the present invention as described above, a diaphragm is installed between the water chamber casing and the gas chamber casing, the hot water heat exchanger is installed in the water chamber, and the gas chamber is installed. Therefore, since the hot water supply and the expansion tank are provided integrally in one heat exchanger casing, the manufacturing cost of the boiler is lowered and the production is easier.

In addition, the present invention collectively forms a plurality of small heating water flow holes in the diaphragm instead of a large flow hole, and protruding the support jaw around the heating water flow holes. Therefore, even when used for a long time, the diaphragm of the elastic material prevents deformation or malfunction due to the heating water flow hole coming in and protruding to the opposite side.

1 is an exploded perspective view showing a nitrogen tank integrated heat exchanger according to the prior art.

FIG. 2 is a view illustrating a state in which an elastic bag is pinched by passing through a communication hole formed in a compartment plate in FIG. 1.

Figure 3 is an exploded perspective view showing an expansion tank integrated heat exchanger according to the present invention.

4 is an assembled perspective view showing the expansion tank integrated heat exchanger according to the present invention.

Figure 5 is a partially enlarged view showing the assembly of the expansion tank integrated heat exchanger according to the present invention.

6 is a partial view showing a diaphragm of the expansion tank integrated heat exchanger according to the present invention.

FIG. 7 is a cross-sectional view taken along the line AA ′ of FIG. 6.

8 is a partially enlarged view illustrating a diaphragm expanded state of the expansion tank integrated heat exchanger according to the present invention.

9 is an assembly state of the hot water heat exchanger tube of the expansion tank integrated heat exchanger according to the present invention.

10 is a diaphragm assembly state diagram of the expansion tank integrated heat exchanger according to the present invention.

Hereinafter, an expansion tank integrated heat exchanger and a boiler including the same will be described in detail with reference to the accompanying drawings.

First, the expansion tank integrated heat exchanger 200 according to the present invention as shown in FIG. 3 includes a water chamber casing 210, a gas chamber casing 210, a diaphragm 230, a hot water heat exchanger tube 240, and a diaphragm 250. . Each of these components is assembled as shown in FIG.

Accordingly, the water chamber casing 210 and the gas chamber casing 210 are combined to face each other to form one 'heat exchanger casing', and the diaphragm 230 is installed in the heat exchanger casing to partition the water chamber and the gas chamber.

In addition, a hot water heat exchanger tube 240 corresponding to the hot water heat exchanger is installed in the water chamber, and a diaphragm 250 corresponding to the pressure expansion tank is installed in the gas chamber, thereby providing the expansion tank and the heat exchanger as an integrated unit.

In addition, as described in more detail below, the diaphragm 250 is deformed by forming a heating water flow hole 232 formed in the diaphragm 230 in a special structure, and forming various supporting jaws 232b and 232c around the diaphragm 230. And improve its operational reliability.

More specifically, the water chamber casing 210 is open at one side thereof and includes a water chamber through which heating water flows. That is, the male thread is formed in the space enclosed by the inner wall surface of the male thread casing 210.

In addition, the water chamber casing 210 is provided with a heating water inlet 211, a heating water outlet 212, a direct water inlet 213, and a hot water outlet 214, and includes an air vent (AV) if necessary. do.

For example, the heating water inlet 211 is connected to one side of the water chamber casing 210, and the other side of the heating water inlet 212 is connected to the heating water outlet 212. The direct water inlet 213 and the hot water outlet 214 are connected to a side provided with the heating water outlet 212.

The heating water inlet 211 and the heating water outlet 212 communicate with the water chamber inside the water chamber casing 210, and a heating water circulation pipe (not shown) of the boiler is connected thereto. Therefore, the high temperature heating water introduced through the heating water inlet 211 is discharged from the heating water outlet 212 after passing through the water chamber.

Through this, since the high temperature heating water exchanges heat with the hot water heat exchanger tube 240 installed in the water chamber, the hot water circulating through the hot water heat exchanger 240 is heated to always prepare hot water.

The direct water inlet 213 and the hot water outlet 214 also communicate with the water chamber inside the water chamber casing 210, and both ends of the hot water heat exchanger tube 240 are respectively connected to the water inlet 213 and the hot water outlet in the water chamber casing 210. 214 is inserted and coupled.

However, it is preferable that the pressure receiving portion 210b protruding outward is formed on the upper surface of the water chamber casing 210. For example, the pressure receiving portion 210b has an approximately oval shape at the center of the water chamber casing 210. .

Therefore, since the volume of the water chamber is increased by the pressure accommodating portion 210b, when the heating water is instantaneously introduced in a large amount by the pressure accommodating portion 210b, the water chamber casing 210 is endured without being damaged even at the pressure and the water shock. do.

The flange portion 210a provided in the lower portion of the water chamber casing 210 is used for coupling with the gas chamber casing 210 as described below.

The gas chamber casing 210 is assembled to face the water chamber casing 210 with each other. There is no particular limitation on the assembly method, and in one embodiment, the flange portion 210a of the water chamber casing 210 is inserted into the flange portion 220a of the gas chamber casing 210.

The gas chamber casing 210 has an open side and a gas chamber inside thereof, similar to the male chamber casing 210. That is, the gas chamber is formed in the space surrounded by the inner wall surface of the gas chamber casing 210.

In addition, a gas injection hole 221 is installed at one side of the gas chamber casing 210. The gas injection port 221 is installed to communicate with the gas chamber to enable the injection of nitrogen gas or the like.

As such, when gas is injected such that the gas chamber inside the gas chamber casing 210 has a set pressure, the diaphragm 250 to be described later expands and swells toward the diaphragm 230.

On the other hand, when the temperature of the heating water rises and the pressure of the boiler pipe is higher than the gas chamber pressure, the heating water is introduced through the heating water flow hole 232 of the diaphragm 230. At this time, the heating water absorbs the shock since the inflated diaphragm 250 flows into the gas chamber.

However, as shown in FIG. 5, an end of the diaphragm 230 forms a curing to bend outward, an end of the gas chamber casing 210 forms a curing to be bent inward, and an end of the diaphragm 250 is outside. Bend to side and assemble to be inserted between these curlings.

As such, when the shape of the crimping portion of the diaphragm 250 and the shape of the crimping contact portion of the gas chamber casing 210 are inclined to the outside, the volume of the diaphragm 250 is compressed and expanded during the curing operation is induced to expand outwardly, so that the pressing process When finished, the diaphragm 250 is not dislodged.

In addition, the expanded diaphragm 250 may maximize the airtight performance by being in close contact with the gas chamber side and the bottom surface of the chamber, and prevent it from being dislodged during the process because it is not detached when assembled to the chamber.

The diaphragm 230 is assembled at the boundary of the water chamber and the gas chamber in the heat exchanger casing. For example, the diaphragm 250 is placed on the gas chamber casing 210, and the diaphragm 250 is placed on the upper portion of the diaphragm 250, and the hot water heat exchanger tube 240 is assembled with the water chamber casing 210 assembled thereon. The inside of the casing is partitioned.

The diaphragm 230 has a fitting portion 230a for guiding the insertion of the diaphragm 250 along the lower edge thereof, and protrudes downward, and the plate surface has a peeling protrusion 231 formed thereon, and a specific region on one side thereof. Heating water flow holes 232 are formed in the set.

At this time, it is preferable that at least one protrusion protrusion 231 protrudes from a lower surface of the diaphragm 250 on which the diaphragm 250 is disposed. In FIG. 3, for example, the upper surface of the diaphragm 230 is compressed to protrude to the lower surface of the separation protrusion 231.

In addition, the peeling protrusion 231 is formed in a straight line shape along the width direction of the diaphragm 230, and is provided at regular intervals along the longitudinal direction of the diaphragm 230.

Therefore, even if the diaphragm 250 is inflated and kept in contact with the diaphragm 230 for a long time, the diaphragm 250 is easily separated by the peeling protrusion 231. This is because the contact surface area of the diaphragm 250 and the diaphragm 230 is reduced by the peeling protrusion 231.

In the related art, the diaphragm 250 is inflated by a gas so that the diaphragm 250 is in close contact with the diaphragm 230, and when such a state is maintained for a long time, an elastic bag of a rubber material adheres to the diaphragm 230.

Therefore, even if the pressure of the heating water rises and the volume thereof increases, the diaphragm 250 adheres to the diaphragm 230, and thus the heating water pushes the diaphragm 250 out of the gas chamber side.

Furthermore, the peeling protrusion 231 also increases the heat exchange rate with the hot water heat exchanger tube 240 installed in the chamber because the vortex is generated by changing the flow direction of the introduced heating water when the heating water is introduced into the chamber. do.

Next, the heating water flow hole 232 of the diaphragm 230 allows the heating water to flow from the water chamber side to the gas chamber side. In other words, when the pressure of the boiler pipe increases, the heating water flows from the water chamber to the gas chamber to absorb the impact of the pressure change. When the pressure in the boiler pipe is lowered, the heating water in the gas chamber is discharged back to the water chamber by the pressure in the gas chamber.

In particular, a plurality of heating water flow holes 232 in the present invention, a plurality of heating water flow holes 232 are formed in a specific area provided on one side of the diaphragm 230, so that the heating water is each heating water Dispersion flows through the flow hole 232.

As shown in FIG. 6, in one embodiment, the plurality of heating water flow holes 232 are formed at predetermined intervals along the circumferential direction on the installation surface 232a in the specific zone. As a result, the boundary line of a particular zone is circular.

Instead of using a single heating water flow hole (see FIG. 2) having a large diameter as in the related art, in the present invention, several heating water flow holes 232 having a small diameter are collectively formed in a specific zone.

Accordingly, the present invention can significantly reduce the flow of the expanded diaphragm 250 to the opposite side to the heating water flow hole 232 while allowing the same flow rate.

Therefore, the present invention not only prevents the diaphragm 250 from being deformed and loses its function, but also prevents the diaphragm 250 from being caught in the heating water flow hole 232 so that the heating water flow hole 232 is not blocked.

In addition, as shown in FIG. 7, it is preferable that the first support jaw 232b protrudes along the boundary line of the specific region on the bottom surface of the diaphragm 230. Since the bottom surface of the diaphragm 230 is a surface on which the diaphragm 250 is disposed, the first supporting jaw 232b supports the diaphragm 250.

As described above, when the first supporting jaw 232b supports the diaphragm 250 and forms a plurality of small heating water flow holes 232 in a specific area as described above, the diaphragm may be formed in the heating water flow holes 232. 250) is prevented from being pinched.

In addition, when the expanded diaphragm 250 comes into contact with the first supporting jaw 232b, a sealing is formed at the contact point, thereby preventing the heating water from flowing into the gas chamber in a normal state in which the pressure of the pipe does not become higher than the gas chamber pressure. .

Furthermore, it is preferable that the second support jaw 232c protrudes between the heating water flow holes 232 in the lower surface of the diaphragm 230. Through this, the entire periphery of each heating water flow hole 232 is surrounded by the first support jaw 232b and the second support jaw 232c.

When the first support jaw 232b exists in the boundary line of a specific area around the heating water flow hole 232, and the second support jaw 232c exists between the heating water flow holes 232. Around each heating water flow hole 232 has a structure inclined upwardly (see arrow).

Therefore, since the expanded diaphragm 250 is supported by the first support jaw 232b and the second support jaw 232c and is not inserted into the heating water flow hole 232, the diaphragm 250 is further increased. To prevent deformation and ensure smooth operation.

However, the first support jaw 232b and the second support jaw 232c may be continuously formed, but may be formed at regular intervals while maintaining the pattern. For example, the first support jaw 232b may be formed at regular intervals along the circular pattern instead of being continuously formed in a circular pattern.

On the other hand, the hot water heat exchanger 240 prepares hot water at an appropriate temperature at all times in preparation for the user's use of hot water, thereby preventing cold water from being used for the first time or taking a long time to supply hot water.

To this end, the hot water heat exchanger tube 240 is assembled between the diaphragm 230 and the water chamber. That is, the hot water heat exchanger tube 240 is assembled in the water chamber casing 210 and has a coil shape wound a plurality of times so that heat exchange is performed for a sufficient time by increasing the length of the flow path.

In addition, as shown in FIG. 9, the inlet 241 provided at one end of the hot water heat exchanger 240 is fitted to the direct inlet 213 of the water chamber casing 210, and the outlet 242 at the other end of the other side is opposite. ) Is fitted to the hot water outlet 214 of the water chamber casing 210.

Therefore, when a direct water pipe (not shown) is connected to the direct inlet 213 and a hot water pipe (not shown) is connected to the hot water outlet 214, the low temperature direct water supplied through the direct water pipe is a hot water heat exchanger tube 240. It is supplied to the inlet 241 of.

Direct water supplied to the hot water heat exchanger tube 240 is hot water by heat exchange with the hot water filled in the water chamber while circulating the inside of the hot water heat exchanger tube 240, such hot water is the outlet of the hot water heat exchanger tube 240 It is discharged to the hot water pipe through 242.

The diaphragm 250 corresponds to an elastic bag made of an elastic material and is inflated by a gas (for example, nitrogen gas) of a predetermined pressure injected into the gas chamber, and thus serves as a pressure expansion tank.

The diaphragm 250 is assembled between the diaphragm 230 and the gas chamber. That is, the diaphragm 250 is assembled in the gas chamber casing 210.

In addition, as shown in FIG. 10, the diaphragm 250 has a cover shape covering an entire open upper portion of the gas chamber casing 210 as an example, and as shown in FIG. 3, the upper expansion part 250a and the lower connection part ( 250b).

Therefore, when the pressure by the heating water is lower than the gas chamber pressure, the expansion state is maintained toward the diaphragm 230. On the other hand, when the pressure of the heating water is higher than the gas chamber pressure, it is contracted by the heating water introduced into the gas chamber through the diaphragm 230 in the water chamber.

Hereinafter, the boiler of the present invention including the expansion tank integrated heat exchanger 200 will be described.

Boiler of the present invention is characterized in that it comprises an expansion tank integrated heat exchanger 200 of the above-described configuration, other than that known in the art can be applied to boilers of various ways.

For example, the boiler includes a boiler body, a burner, a main heat exchanger, and an association, and the like, and the burner and the main heat exchanger as well as the expansion tank integrated heat exchanger 200 of the present invention are installed inside the boiler body. The furnace discharges the combustion gas generated in the combustion of the burner to the outside.

In addition, the heating water inlet 211 of the expansion tank integrated heat exchanger 200 is connected to the heating water supply pipe, the heating water outlet 212 is connected to the heating water discharge pipe. In addition, the heating water supply pipe is connected to the main heat exchanger, the heating water discharge pipe is extended to the heating space.

Accordingly, the heating return flows to the main heat exchanger by the flame generated during the ignition of the burner and the high-temperature combustion gas becomes the high temperature heating water, and the high temperature heating water is the number of the expansion tank integrated heat exchanger 200 through the heating water supply pipe. Supplied with thread.

In addition, the high temperature heating water supplied to the water chamber of the expansion tank integrated heat exchanger 200 makes hot water by heat exchange with the low temperature direct water flowing in the hot water heat exchanger tube 240 installed in the water chamber, and the hot water is discharged through the hot water pipe. .

In the above, the specific Example of this invention was described above. However, the spirit and scope of the present invention is not limited to these specific embodiments, and various changes and modifications can be made without departing from the spirit of the present invention. Those who have it will understand.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

Claims (7)

It is provided with a water chamber through which the heating water flows, and the heating water inlet 211 through which the heating water flows, the heating water outlet 212 through which the heating water is discharged, the direct water inlet 213 through which the direct water flows, and hot water are discharged. A water chamber casing 210 including a hot water outlet 214 to be used; A gas chamber casing 210 which is assembled to face the water chamber casing 210 to form a heat exchanger casing and has a gas chamber therein; A diaphragm 230 which is assembled at a boundary between the water chamber and the gas chamber in the heat exchanger casing, and in which a plurality of heating water flow holes 232 are collectively formed so that heating water is dispersed and introduced into a specific region of one side; It is assembled between one side of the diaphragm 230 and the water chamber, the inlet 241 of one end is fitted into the direct inlet 213 of the water chamber casing 210, the outlet 242 of the other end is the water chamber A hot water heat exchanger tube 240 fitted into the hot water outlet 214 of the casing 210; And The diaphragm 250 is assembled between the other side of the diaphragm 230 and the gas chamber, and is expanded by the expansion gas filled in the gas chamber or compressed by the heating water introduced into the gas chamber through the heating water flow hole 232. Expansion tank integrated heat exchanger comprising: a. The method of claim 1, The expansion tank integrated heat exchanger, characterized in that the first support jaw (232b) protrudes along the boundary line of the specific area on the bottom surface of the diaphragm (250) is disposed. The method of claim 2, An expansion tank integrated heat exchanger, characterized in that the second support jaw (232c) is protruded between the heating water flow hole (232) of the lower surface of the diaphragm (230). The method of claim 3, The plurality of heating water flow holes (232) are formed in the specific zone at regular intervals along the circumferential direction, the boundary line of the specific zone is an expansion tank integrated heat exchanger, characterized in that consisting of a circle. The method of claim 1, Expansion tank integrated heat exchanger, characterized in that at least one or more peeling protrusions (231) protruding from the bottom surface of the diaphragm (250) is disposed. The method of claim 1, An end of the diaphragm 230 forms a curing to bend outward, and an end of the gas chamber casing 210 forms a curing to be bent inward, and an end of the diaphragm 250 is bent outward. Expansion tank integrated heat exchanger, characterized in that assembled between the curing of the diaphragm 230 and the gas chamber casing (210). A boiler comprising an expansion tank integrated heat exchanger as in any one of claims 1 to 6.

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