RU2647264C1 - Heat exchanger with guide circulation - Google Patents

Abstract

FIELD: heat engineering.

SUBSTANCE: invention relates to heat engineering and can be used in shell-and-tube heat exchangers. Invention consists in that heat exchanger comprises flow circulation guide made in form of spiral guide plate installed at flow outlet from heat exchanger water chamber.

EFFECT: technical result is creation of flow circulation that prevents stagnation of heated water and maintenance of its high temperature at heat exchanger outlet.

6 cl, 8 dwg

Description

Technical field

The present invention relates to a heat exchanger having a circulation guide, and in particular, to a heat exchanger having a circulation guide that causes circulation, which prevents stagnation of water, which exchanges heat with a combustible gas at high temperature.

In particular, the present invention relates to a heat exchanger having a circulation guide that includes a spiral guide arranged on the discharge port side to cause water to flow to the discharge side, and a plate-shaped guide arranged on the intake port side to force water flow to the discharge side.

State of the art

Typically, a boiler used at home, in an office, in a factory, and in public buildings of various types includes a burner for supplying a heat source (flame and combustible gas at high temperature), and a heat exchanger that exchanges heat between the heat source supplied by the burner, and water.

For example, the boiler described in Korean Patent Laid-Open Publication No. 2013-0085090, as shown in Figures 1 and 2, includes a combustion device 150 having a blower fan 152 and a fuel suction port 153, in addition to the burner 151, and a heat exchanger, with installation below the device 150 of combustion.

The heat exchanger includes a boiler casing 110, a water tank 120, an upper end plate 121, a lower end plate 122, and a combustion pipe 130. In this case, the water supplied by the direct-flow water supply pipe 112a passes through the water tank 120, respectively, in the water chamber, and then is discharged to the discharge pipe 112b.

Thus, a heat source, such as a flame, and combustible gas at high temperature, supplied by a burner 151, attached to a combustion chamber 111, heats water as it passes through the combustion pipe 130. Combustible gas whose heat is transported by water is discharged externally via a discharge port 140.

However, in the aforementioned prior art, while the water supplied through the direct-flow water supply pipe 112a passes through the water tank 120, stagnation occurs in a particular section of the water tank 120, such as, for example, a swirl flow or counterflow.

In particular, a wide flow space (a portion of the first space) is formed in the lower portion of the upper end plate 121, which constitutes the combustion chamber 111, while a narrow flow path (a portion of the second space) is formed between the side walls of the combustion chamber 111 and the boiler casing 110, thus serious stagnation is formed in the section into which water is introduced from the second space into the first space.

Thus, when the water is excessively heated in a local area where there is stagnation, the noise of boiling water (i.e., boiling noise) and foreign substances, for example, scale, form in the stagnation region, which stick to the surface there, thereby reducing the heat exchange efficiency with heat source; in this case, a beating phenomenon (i.e., ± temperature difference) of the temperatures of the supplied hot water or network water occurs.

Disclosure of invention

Technical problem

The present invention is directed to the provision of a heat exchanger having a circulation guide that causes circulation to prevent stagnation of water exchanging heat with combustible gas at high temperature.

One aspect of the present invention provides a heat exchanger having a circulation guide, including: a heat exchanger housing having a water chamber within it; an inlet port that is connected to the lower end of the heat exchanger housing and through which water is supplied to the water chamber; a discharge port, which is connected to the upper end of the heat exchanger housing, and through which water is discharged from the water chamber; the upper pipe of the body, with the installation on the upper end from the inside of the heat exchanger body, with a combustion chamber formed inside; lower end plate, with installation on the lower end inside the heat exchanger body; and a plurality of combustion pipes, wherein the upper end of each is connected to pass through the surface of the lower portion of the upper pipe of the body, and the lower end is connected to pass through the lower end plate, to discharge combustible gas introduced at high temperature through the combustion chamber, and the side walls constituting the upper pipe of the casing are spaced apart from each other inward from the inner peripheral surface of the heat exchanger casing, and the spiral guide, which runs in a spiral, is installed on the inner peri The serial sidewall surface.

The ends of the spiral guide in the direction of its passage may be in contact with the inner peripheral surface of the heat exchanger body.

The heat exchanger may further include a plate-shaped guide that is installed to pass combustion pipes into the heat exchanger housing and which closes a portion of the water chamber of the heat exchanger housing to initiate a flow of water for replacement.

A plate-shaped guide may include a plurality of sub-guides, and this many sub-guides can be installed in the heat exchanger housing in height, with their spacing from each other.

A plurality of sub-guides may include: a central flow guide, with installation extending outward from the center of the heat exchanger body to a predetermined length; and a peripheral flow guide, with the passage from the inner peripheral surface of the heat exchanger body inward to a predetermined length.

The peripheral flow guide may be installed above the central flow guide.

Beneficial effect

As described above, in accordance with the present invention, the circulation guide is installed in a water chamber in which water flows, so that water exchanging heat with combustible gas at high temperature cannot stagnate in the local area of the heat exchanger.

In particular, the spiral guide, which forces water to flow to the discharge side, and the plate-shaped guide, which forces water to flow to the discharge side, are arranged in such a way that water stagnation can be effectively prevented.

Therefore, there will be no noise from boiling water due to excessive heating of the stagnation area, and the heat transfer efficiency will not decrease due to foreign substances, such as scale, which are formed in such a stagnation area, and there will be no temperature difference in hot water or network water.

Description of drawings

Figure 1 is a cross-sectional view of a boiler in accordance with the prior art.

Figure 2 is a perspective view of a boiler heat exchanger, in accordance with the prior art.

Figure 3 is a cross-sectional view of a heat exchanger having a circulation guide in accordance with a first embodiment of the present invention.

4 is a perspective view of a spiral guide in accordance with a first embodiment of the present invention.

5 is a cross-sectional view of a heat exchanger having a circulation guide in accordance with a second embodiment of the present invention.

6 is a plan view of a plate-shaped guide in accordance with a second embodiment of the present invention.

The implementation of the invention

Here, a heat exchanger having a circulation guide in accordance with exemplary embodiments of the present invention is described in detail together with the accompanying drawings.

However, hereinafter, a downward type is illustrated in which the burner is mounted on the upper side for directing the flame downward, and the present invention also covers the upward type, and it is obvious that the up and down directions can be freely changed depending on the type - downward or ascending.

First of all, as shown in FIG. 3, in a heat exchanger having a circulation guide according to the first embodiment of the present invention, the spiral guide 223 is shown as a circulation guide that prevents water stagnation.

In this case, the heat exchanger having a circulation guide in accordance with the present invention includes a heat exchanger body 210 having a water chamber 210a inside it, an upper body pipe 220, with an internal combustion chamber 220a installed on the upper end of the heat exchanger body 210a, a lower plate 230 , which closes the lower end of the heat exchanger body 210, and a combustion pipe 240, by which combustible gas is discharged at high temperature.

In particular, the present invention includes a helical guide 223, with an upper housing pipe 220 located on the side walls 221, in contrast to the prior art, so that a stagnation phenomenon, such as a vortex flow or counterflow, cannot occur locally in the water chamber 210a inside the heat exchanger housing 210.

In more detail, the heat exchanger housing 210 has a water chamber 210a, which is a portion of the space in which water flows and which is formed internally. The heat exchanger housing 210 has a cylindrical shape, for example, and is entirely used internally as a water chamber 210a.

In addition, the inlet port IN through which water is supplied is connected to the lower end of the heat exchanger housing 210, and the discharge port OUT, through which water is discharged from the water chamber 210a, is connected to the upper end of the heat exchanger housing 210.

Thus, at low temperature, direct-flow water or network circulating water is introduced into the water chamber 210a inside the heat exchanger body 210 through the inlet port IN, and the introduced direct-flow water or network circulating water is heated by heat exchange, and then discharged through the reset port OUT. Water discharged through the discharge port OUT is used as hot water or as mains water.

The upper pipe 220 of the housing, with the installation on the upper end of the inner space of the heat exchanger housing 210, covers the upper end of the open heat exchanger housing 210. For this purpose, the upper pipe 220 of the housing includes cylindrical side walls 221 and the surface 222, with the location in the lower section of the upper pipe 220 of the housing.

In this case, there is a combustion chamber 220a in the inner space of the upper pipe 220 of the casing, surrounded by side walls 221 and surface 222. A burner (see 151 in FIG. 1) is installed in the upper section of the open combustion chamber 220a to direct the flame and combustible gas downward at high temperature generated in the burner.

In addition, the side walls 221 of the upper housing pipe 220 are spaced apart from each other inside the inner peripheral surface of the heat exchanger housing 210. Thus, the water introduced into the space between them is discharged outwardly via the OUT port.

In addition, the surface 222 in the lower portion of the upper housing pipe 220 serves as an upper end plate that covers the upper portion of the heat exchanger housing 210. There are many mounting holes through the surface 222 in the lower portion of the upper housing pipe 220, such that the upper end of the combustion pipe 240 is inserted into the upper housing pipe 220 through such a plurality of mounting holes.

A lower end plate 230 is mounted on the lower end of the interior of the heat exchanger housing 210 and closes the lower end of the open heat exchanger housing 210.

In addition, there are also a plurality of mounting holes through the lower end plate 230, so that the lower end of the combustion pipe 240 is inserted into the lower end plate 230 using this plurality of mounting holes.

The number of mounting holes present in the lower end plate 230 is the same as the number of mounting holes in the surface 222 of the lower portion of the upper end plate, and their locations are the same as the locations of the mounting holes present in the surface 222 of the lower portion of the upper end plate.

Thus, the combustion pipe 240 is mated between the surface 222 of the lower portion of the upper housing pipe 220 and the lower end plate 230, arranged in parallel, in a vertical direction, so that the combustible gas generated in the combustion chamber 220a passes through the combustion pipe 240 and is discharged out.

The combustion pipe 240 is used as the path through which the combustible gas is discharged at high temperature, and there are a plurality of combustion pipes 240 for smoothly discharging the combustible gas exiting the combustion chamber 220a, while the plurality of combustion pipes 240 are spaced apart and increase the heat exchange surface area within the water chamber 210a.

In this case, the upper ends of the plurality of combustion pipes 240 are connected to each other, passing through the surface 222 of the lower portion of the upper housing pipe 220, and the lower ends of the plurality of combustion pipes 240 are connected to each other, passing through the lower end plate 230. Thus, it is reset combustible gas at high temperature introduced by the combustion chamber 220a, and in this procedure, the combustible gas at high temperature exchanges heat with water filling the water chamber 210a.

However, heat exchange fins (see 130a in Figure 2), as is known from Figure 2, are located on the inner peripheral surfaces of the combustion pipes 240 in order to improve the heat exchange efficiency between the combustible gas and water.

Moreover, as is known from (a) and (b) in FIG. 4 in more detail, the spiral guide 223 is mounted on the inner peripheral surfaces of the side walls 221, which is the upper pipe 220 of the casing. The spiral guide 223 does not allow water to stagnate in the water chamber 210a inside the heat exchanger body 210.

For this purpose, there is a spiral guide 223 on the inner peripheral surfaces of the side walls 221 to have a spiral shape in the height direction. In this case, the spiral guide 223 extends from the side walls 221 inward to a predetermined length.

Thus, when water (i.e., direct-flow water or network circulating water) is introduced through the inlet port IN, due to the use of a pump, it flows upward and an inlet water flow occurs in a narrow flow path formed between the heat exchanger body 210 and the upper end side walls 221 plate, water is twisted into a spiral thanks to the spiral guide 223.

In addition, when water is discharged through the discharge port OUT, when twisted into a spiral due to the spiral guide 223, the flowing water is sucked in and dragged from the lower portion of the upper pipe 220 of the housing, thus stagnation, such as a vortex flow or counterflow, in the water chamber 210a of the housing 210 heat exchanger does not form.

In particular, a wide flow space (first space portion) is formed in the lower portion of the upper housing pipe 220, representing a combustion chamber 220a, wherein a narrow flow path (second space portion) is formed between the side walls 221 of the upper housing pipe 220 and the heat exchanger housing 210. Stagnation of water is prevented even at the point at which water flows into the first section of space from the second section of space.

Therefore, there will be no noise from boiling water due to excessive heating of the stagnation area, and the heat transfer efficiency will not decrease due to foreign substances, such as scale, which are formed in such a stagnation area, and there will be no temperature difference in hot water or network water.

However, preferably, the ends of the spiral guide 223 in the direction of its passage may be in contact with the inner peripheral surface of the heat exchanger body 210. Thus, water passes through the spiral guide 223, and the water spins into the spiral with greater force.

Next, a heat exchanger having a circulation guide in accordance with a second embodiment of the present invention will be presented. The heat exchanger, in accordance with the second embodiment of the present invention, is characterized by the presence of an additional guide in the form of a plate, in addition to the aforementioned spiral guide, as a circulation guide, preventing stagnation of water.

As shown in FIG. 5, a heat exchanger having a circulation guide according to a second embodiment of the present invention also includes a heat exchanger housing 210, with a water chamber 210a, an upper housing pipe 220, with a combustion chamber 220a inside, a lower end plate 230, which closes the lower end of the heat exchanger body 210, and a combustion pipe 240 through which combustible gas is discharged at high temperature.

In addition, the upper housing pipe 220 includes side walls 221 and the surface 222, and there is a helical guide 223, with the upper housing pipe 220 being installed on the side walls 221. These configurations repeat those of the first embodiment of the present invention.

Thus, direct-flow water or network circulating water supplied to the water chamber 210a inside the heat exchanger body 210 through the inlet port IN passes through the interior of the water chamber 210a and is discharged through the discharge port OUT. When discharging stagnant water is prevented by a spiral guide 223.

In addition, the flame and the combustible gas exit through a burner connected to the upper pipe 220 of the housing, and the combustible gas is discharged outward through the combustion pipe 240. Thus, direct-flow water or network circulating water supplied to the water chamber 210a performs heat exchange with a flame and combustible gas, and is heated; heated water is supplied as hot water or network water.

In this case, the heat exchanger having a circulation guide in accordance with the second embodiment of the present invention further includes a plate-shaped guide 250, and the plate-shaped guide 250 is installed so that the combustion pipe 240 can pass through it inside the heat exchanger body 210, and closes a part the water chamber 210a of the heat exchanger body 210 to initiate a flow of water for replacement.

The purpose of initiating a guide 250 in the form of a water flow plate for replacement is, firstly, to prevent stagnation of water locally in a specific area of the water chamber 210a, and secondly, to allow water to evenly distribute throughout the water chamber 210a to increase heat transfer efficiency.

Thus, it is possible to use one or a plurality of plate-shaped guides 250 configured to achieve at least two such goals, and their installation position is also properly selected according to the shape of the heat exchanger body 210.

However, it is obvious that a plurality of plate-shaped guides 250 are used, and not one plate-shaped guide 250; thus, the two above goals are achieved with greater reliability. Therefore, the plate-shaped guide 250 includes sub-rails 250-1 and 250-2, and such a plurality of sub-rails 250-1 and 250-2 are mounted in the heat exchanger housing 210 in a height direction spaced apart from each other.

In figure 5, the plate-shaped guide 250 includes two sub-guides 250-1 and 250-2. These two sub-guides 250-1 and 250-2 include a central flow guide 250-1 and a peripheral flow guide 250-2.

The central flow guide 250-1 extends outward from the center of the heat exchanger body 210 to a predetermined length. Thus, water flows through the outer perimeter of the water chamber 210a without a central guide 250-1 inside.

For this purpose, as shown in (a) in FIG. 6, the central flow guide 250-1 has a disc shape with a smaller diameter than the water chamber 210a, and there are many mounting holes 250-1a in the central guide 250-1 through which inserted and installed in the Central flow guide 250-1 of the combustion pipe 240. The number and position of the plurality of first mounting holes 250-1a are the same as those of the combustion pipes 240 that pass through the central flow guide 250-1 of the plurality of combustion pipes 240.

In addition, there is a peripheral flow guide 250-2 extending from the inner peripheral surface of the heat exchanger housing 210 inward to a predetermined length. Thus, water flows through the center 250-2b of the water chamber 210a without a peripheral flow guide 250-2 inside.

For this purpose, as shown in (b) of FIG. 6, the peripheral flow guide 250-2 has a disk shape of the same diameter as the water chamber 210a, and there are many mounting holes 250-2a in the peripheral guide 250-2a through which inserted and installed in the peripheral flow guide 250-2 of the combustion pipe 240. In addition, there is a flow opening 250-2b through which water passes and which is located in the center of the peripheral flow guide 250-2.

However, it is preferable if the above-described peripheral flow guide 250-2 is mounted above the central flow guide 250-1.

When water passes around the perimeter of the water chamber 210a due to the central flow guide 250-1 located below the peripheral flow guide 250-2, and then passes through the center (i.e. through the flow opening) of the peripheral flow guide 250-2 located above the central guide 250-1 flow, water circulates, and water is directed to the perimeter of the water chamber 210a. This is because the water is naturally directed to the area where the spiral guide 223 is installed.

As previously described, the plate-shaped guide 250 causes a change in the flow of water supplied by the pump, so that water stagnation is not formed in the local area of the water chamber 210a.

In addition, where water is twisted into a spiral due to the spiral guide 223 installed at the OUT discharge port, and the suction force acts on the water below the spiral guide 223, there is a plate-shaped guide 250 installed at the IN intake port, which directs the water to the spiral guide 223. This additionally prevents stagnation of water.

Industrial applicability

While the invention has been described and shown with reference to specific exemplary embodiments, those skilled in the art will appreciate that various changes in form and detail are possible without departing from the spirit and scope of the present invention in accordance with the appended claims.

Thus, since the above embodiments are intended to fully inform those skilled in the art, those skilled in the art will understand that these embodiments are illustrative in all aspects and are not restrictive, and the present invention is defined solely by the claims.

Claims (15)

1. A heat exchanger having a circulation guide, comprising: a heat exchanger housing (210) having a water chamber (210a) inside it; an inlet port (IN), which is connected to the lower end of the heat exchanger housing (210) and through which water is supplied to the water chamber (210a); a discharge port (OUT), which is connected to the upper end of the heat exchanger housing (210) and through which water is discharged from the water chamber (210a); the upper tube (220) of the housing with the installation on the upper end, from the inside of the housing (210), a heat exchanger with a combustion chamber (220a) formed inside; a lower end plate (230) with installation on the lower end inside the body (210) of the heat exchanger; and a plurality of combustion pipes (240), with the upper end of each connected to pass through the surface (222) of the lower portion of the upper pipe (220) of the housing, and the lower end connected to pass through the lower end plate (230) to discharge combustible gas at high temperature introduced through the combustion chamber (220a), the side walls (221) constituting the upper pipe (220) of the housing are spaced apart from each other inward from the inner peripheral surface of the housing (210) of the heat exchanger and there is a spiral guide (223), which runs in a spiral, with the side walls mounted on the inner peripheral surfaces walls (221). 2. The heat exchanger according to claim 1, characterized in that the ends of the guide circulation are arranged to ensure contact with the inner peripheral surface of the heat exchanger body (210). 3. The heat exchanger according to claim 1 or 2, characterized in that it further comprises a guide (250) in the form of a plate, installed to pass the pipes (240) of combustion inside the housing (210) of the heat exchanger and the closing part of the water chamber (210a) of the housing (210 ) a heat exchanger for changing the direction of water flow. 4. The heat exchanger according to claim 3, characterized in that the plate-shaped guide (250) comprises a plurality of sub-guides (250-1, 250-2) installed in the height of the heat exchanger body (210), with their spacing from each other. 5. The heat exchanger according to claim 4, characterized in that the plurality of sub-rails (250-1, 250-2) contain: the central guide (250-1) of the flow, with the installation of the passage from the center of the housing (210) of the heat exchanger outside to a predetermined length; and peripheral guide (250-2) of the flow, with the passage from the inner peripheral surface of the housing (210) of the heat exchanger inward to a predetermined length. 6. The heat exchanger according to claim 5, characterized in that the peripheral flow guide (250-2) is installed above the central flow guide (250-1).

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