KR102020308B1 - Hybrid heat exchanger - Google Patents

Abstract

Disclosed is a hybrid heat exchanger. The hybrid heat exchanger may comprise: a tank inner container having an inner space in which a downward combustion burner and a tube pipe are combined, wherein the tube pipe is arranged at a lower part of the burner; a first tank outer container which is coupled by surrounding the outside of the tank inner container, and has an inner space, wherein a fluid flowing in through a first introduction part formed at a lower part moves through the inner space and is discharged to the tube pipe by connecting the tube pipe and a first discharging part formed at an upper part; and a second tank outer container which surrounds the outside of the tank inner container corresponding to the position of the burner, is coupled to the first tank outer container in a separated manner at the upper part of the first tank outer container, and has an empty space therein, wherein the fluid flowing in from the tube pipe through a second introduction part formed at a lower part moves through the inner space and is discharged through a second discharging part formed at an upper part. Accordingly, the hybrid heat exchanger can improve heat exchanging efficiency.

Description

Hybrid heat exchanger

The present invention relates to a hybrid heat exchanger, in particular to a hybrid heat exchanger that can improve the heat exchange efficiency while reducing the welding point compared to the associated heat exchanger to prevent the risk of high hydraulic pressure and overcome the limitation of the fluid storage capacity of the water pipe-type heat exchanger It is about.

Conventional heat exchangers can be largely divided into water pipe-type heat exchanger and associated heat exchanger. A water pipe heat exchanger forms a plurality of water pipes and heats the water in the water pipe outside the water, and a fin-tube type or a tube is composed of water pipe coils, and a system in which a burner is disposed in the coil has been typically used. . In addition, associative heat exchanger is a way to heat the water on the outside of the tube by piping a number of thin tubes and the heat gas through them. However, in the case of the water tube type, the thermal efficiency is relatively higher than that of the associated type, but due to the diameter and the length of the tube, a large load causes a large pressure drop between the fluid inlet and the outlet depending on the working pressure. In addition, the associated heat exchanger has the advantage that the pressure difference is relatively small and can store a large amount of fluid, but there is a large welding risk due to the large number of points for welding the tube and the inside and outside of the tank. There is a small tendency. For example, a water pipe type heat exchanger is disclosed in Korean Patent No. 10-0460503 (published Aug. 19, 2004) and the like, and an associated heat exchanger is registered Korean Utility Model No. 0132787 (published Jan. 1, 1998). And the like.

The problem to be solved by the present invention is to provide a hybrid heat exchanger that can improve the heat exchange efficiency while reducing the welding point compared to the associated heat exchanger to prevent the risk of high water pressure and overcome the limitation of the fluid storage capacity of the water pipe-type heat exchanger. have.

Hybrid heat exchanger according to an embodiment of the present invention for achieving the above object is a tank and a tube of the burner and the tube of the down combustion method is coupled to the inner space and the tube tube is located below the burner, the tank It is coupled to surround the outside, the inner space is formed, the fluid introduced through the first inlet formed in the lower portion is moved through the inner space and the first outlet formed in the upper portion is connected to the tube tube and the fluid Surrounds the outside of the tank inner cylinder corresponding to the position of the first tank outer cylinder and the burner discharged into the pipe and is separated from the first tank outer cylinder at an upper portion of the first tank outer cylinder, and is formed with an empty space therein; The fluid flowing from the tube tube through the second inlet formed in the lower portion is moved through the inner space and formed at the upper portion 2 emission may be provided with a second tank outer cylinder for discharging the fluid through the.

The first heat exchange occurs while the fluid introduced through the first inlet from the first tank outer portion moves to the first discharge portion, and the fluid introduced into the tube tube of the tank inner tube from the first tank outer tube passes through the tube tube. The secondary heat exchange occurs while moving through, and the third heat exchange may occur while the fluid introduced into the second tank outer tube from the tube tube moves to the second outlet.

The first tank outer cylinder may be coupled to surround a portion corresponding to the position of the tube tube among the tank inner cylinder.

The tube tube is spirally coupled to the inner space of the inner tank, and may have a fin tube shape in which a plurality of fins are coupled.

The first tank outer cylinder is coupled to block a portion between an inner wall and an outer wall of an inner space of the first tank outer cylinder so that the fluid introduced through the first inlet moves to the first outlet while performing turbulent flow. It may further include at least one flow guide.

The second tank outer cylinder has at least one second flow guide coupled to block a portion of the inner space of the second tank outer cylinder so that the fluid introduced through the second inlet moves to the second outlet while performing turbulent motion. It may further include.

The tank may include a second combustion guide having a plurality of through holes formed between the burner and the tube tube in an empty space therein and having a plurality of through holes formed between the lower end of the tank and the combustion gas discharge unit. Combustion guides can be combined.

According to an embodiment of the present invention, the hybrid heat exchanger welds only a connection between the first outlet portion of the first tank outer tube and the tube tube and a second inlet portion of the second tank outer tube and the tube tube. Therefore, there is an advantage in that the risk of high water pressure can be prevented by reducing the welding point as compared to the conventional associated heat exchanger. In addition, the hybrid heat exchanger according to an embodiment according to the technical idea of the present invention can store a large amount of fluid by the heat exchange occurs in the fluid not only in the tube tube, but also in the first tank outer cylinder and the second tank outer cylinder heat exchanger There is an advantage to maximize the fluid storage capacity. Therefore, the present invention employs only the advantages of the heat exchanger having high thermal efficiency and the associated heat exchanger which can reduce the pressure drop due to the smaller pressure difference between the inlet and the outlet than the water pipe type. There is an advantage to compensate for the shortcomings of the tubular and associated heat exchangers. In addition, the hybrid heat exchanger according to an embodiment of the present invention according to the spirit of the present invention heat exchange occurs three times as the fluid is moved, after the first heat exchange with the lowest efficiency after the second heat exchange with higher efficiency, Heat exchange efficiency can be maximized by going through the third most efficient heat exchanger.

BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings cited in the detailed description of the invention, a brief description of each drawing is provided.
1 is a view for explaining the configuration of a hybrid heat exchanger according to an embodiment of the present invention.
2 is a view showing the flow of fluid in the hybrid heat exchanger of FIG.
3 is a view showing the flow of the combustion gas in the hybrid heat exchanger 100 of FIG.

DETAILED DESCRIPTION In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings which illustrate preferred embodiments of the present invention and the contents described in the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a view for explaining the configuration of a hybrid heat exchanger 100 according to an embodiment of the present invention.

Referring to FIG. 1, the hybrid heat exchanger 100 may include an inner tank 110, a first tank outer cylinder 120, and a second tank outer cylinder 130. The hybrid heat exchanger 100 may be used in a boiler, a water heater, and the like, but the hybrid heat exchanger of the present invention is not limited to this case, and may be applied to various apparatuses in which the temperature of the fluid is increased by using the combustion gas to be discharged.

The tank inner cylinder 110 includes an inner space that is an empty space, and the burner 111 and the tube tube 113 may be coupled to the inner space. Burner 111 may be a burner of the combustion method, the tube tube 113 may be located below the burner 111. Tube tube 113 may be spirally coupled to the inner space of the tank inner cylinder (110). For example, the tube tube 113 may be formed spirally between the lower portion of the burner 111 and the combustion gas discharge portion that is the lower portion of the tank inner tube 110, as shown in FIG. Also, for example, the tube tube 111 may be coupled to the inner space of the tank inner tube 110 in a double spiral shape formed spirally even inside the spirally formed portion. As such, the tube tube 113 has a double spiral shape, so that the fluid (for example, water, etc.) introduced into the tube tube 113 moves downward and then moves upward. Fluid may be discharged from the upper side. The movement path of the fluid will be described in more detail with reference to FIG. 2. In addition, the tube tube 111 may have a general tubular shape, but may also have a fin tube shape. That is, the tube tube 111 of the present invention has a fin tube shape in which a plurality of fins that can increase the heat exchange efficiency to the tube tube is combined, so that the first tank outer cylinder 120 and the second tank outer cylinder 130 are insufficient. It is possible to increase the heat exchange efficiency by supplementing the heat transfer area.

The tube tube 113 may be coupled between the first outlet 125 of the first tank outer cylinder 120 and the second inlet 131 of the second tank outer cylinder 130. That is, the fluid of the first tank outer cylinder 120 is introduced into the tube tube 113 through the first discharge portion 125 of the first tank outer cylinder 120, and the heat exchange occurs while moving through the tube tube 113. The fluid may be discharged to the second tank outer cylinder 130 through the second inlet 131. In addition, a first combustion guide 115 and a second combustion guide 117 may be coupled to the inner space of the tank inner cylinder 110. The first combustion guide 115 may have a plate shape in which a plurality of through holes are formed, and may be coupled between the burner 111 and the tube tube 113. The second combustion guide 117 may have a plate shape in which a plurality of through holes are formed, and may be formed between the tube tube 130 and the combustion gas discharge unit. The combustion gas discharge unit may be a space through which the combustion gas is discharged to the outside of the hybrid heat exchanger 100 through the lower end of the tank inner cylinder 110. The first combustion guide 115 and the second combustion guide 117 may be coupled to the internal space of the tank inner cylinder 110 so as to distinguish the internal space of the tank inner cylinder 110. For example, the exhaust gas is moved to the space where the tube tube 113 is located only through the through holes of the first combustion guide 115 in the space where the burner 111 is located, thereby burning the burned gas in the burner 111. As the combustion gas is evenly distributed, the thermal efficiency of the hybrid heat exchanger 100 may be increased. Similarly, the exhaust gas is moved to the outside space of the hybrid heat exchanger 100 only through the through holes of the second combustion guide 117 in the space in which the tube tube 130 is located, whereby the hybrid heat exchange with an even distribution of the combustion gas. The thermal efficiency of the group 100 can be increased.

The first tank outer cylinder 120 is coupled to surround the outside of the tank inner cylinder 110, the inner space may be formed. In addition, a first inlet 121 may be formed at a lower portion of the first tank outer cylinder 120 to allow fluid to flow from the outside of the hybrid heat exchanger 100 through the first inlet 121. In addition, a first discharge part 125 connected to the tube tube 113 is formed at an upper portion of the first tank outer cylinder 120, and fluid may be discharged to the tube tube 113 through the first discharge part 125. . The fluid introduced from the outside of the hybrid heat exchanger 100 through the first inlet portion 121 moves through the inner space of the first tank outer cylinder 120 to generate a first heat exchange, and the fluid on which the first heat exchange occurs is first It may be delivered to the tube tube 113 through the discharge portion (125). That is, the fluid moving in the inner space of the first tank outer cylinder 120 may be transferred to the tube tube 113 in a state in which the first heat exchange occurs as the combustion gas combusted in the burner 111 moves and the temperature of the fluid rises. have.

The first tank outer cylinder 120 blocks a portion of the inner space of the first tank outer cylinder 120 so that the fluid introduced through the first inlet 121 moves to the first outlet 125 with turbulent flow. At least one first flow guide 123 coupled to each other may be included. For example, the first flow guide 123 may have a plate shape narrower than the width of the inner space of the first tank outer cylinder 120 and may be coupled to the inner space of the first tank outer cylinder 120. Therefore, when the fluid does not move to the entire inner space of the first tank outer cylinder 120 and passes through the portion in which the first flow guide 123 is installed, the fluid moves to a narrow space so that turbulent flow occurs, thereby improving heat exchange efficiency. Can be.

The fluid introduced into the tube tube 113 from the first tank outer cylinder 120 moves along the tube tube 113 to cause secondary heat exchange, and the fluid undergoing the secondary heat exchange is removed through the second inlet 131. 2 may be delivered to the tank outer cylinder (130). That is, the fluid in which the primary heat exchange occurs while moving along the inner space of the first tank outer cylinder 120 moves along the tube tube 113 to cause secondary heat exchange by the combustion gas burned by the burner 111. The temperature may be transmitted to the second tank outer cylinder 130 in a higher state. As described above, since the secondary heat exchange using the tube tube 113 has a higher thermal efficiency than the primary heat exchange using the first tank outer cylinder 120, the fluid after the secondary heat exchange is wider in temperature than the fluid after the primary heat exchange. This becomes large.

The second tank outer cylinder 130 is coupled to surround the outside of the tank inner cylinder 110 corresponding to the position of the burner 111, and is separated from the first tank outer cylinder 120 at an upper portion of the first tank outer cylinder 120. Combined, the inner space may be formed. That is, the second tank outer cylinder 130 is coupled to surround the outside of the position of the burner 111 of the tank inner cylinder 110, so that the fluid moving in the inner space of the second tank outer cylinder 130 is the highest temperature Heat exchange can occur using combustion gases. In this case, the first tank outer cylinder 120 may be coupled to surround the portion corresponding to the position of the tube tube 113 of the tank inner cylinder 110. In addition, the second tank outer cylinder 130 is coupled to the first tank outer cylinder 120 so that the fluid in the inner space of the first tank outer cylinder 120 does not flow into the inner space of the second tank outer cylinder 130. . When the first tank outer cylinder 120 and the second tank outer cylinder 130 are integrally formed without being separated, the heat deformation and durability due to the heat shock of the heat exchanger as the combustion gas of the highest temperature is exchanged with the fluid of the lowest temperature There is a problem that this is greatly reduced. Accordingly, the present invention separates the first tank outer cylinder 120 and the second tank outer cylinder 130 to form a combustion gas flow and a flow of fluid in an opposite manner, so that the high temperature fluid flowing into the second tank outer cylinder 130 is best. It is possible to prevent heat deformation due to thermal shock of the heat exchanger and increase durability by causing heat exchange with the combustion gas of high temperature.

A second inlet 131 is formed at a lower portion of the second tank outer cylinder 130 so that the fluid in the tube tube 113 is introduced through the second inlet 131, and an upper portion of the second tank outer cylinder 130 is provided. A second discharge part 135 may be formed so that the fluid may be discharged to the outside of the hybrid heat exchanger 100 through the second discharge part 135. The fluid introduced from the tube tube 113 through the second inlet 131 moves the internal space of the second tank outer cylinder 130 to cause the third heat exchange, and the fluid in which the third heat exchange occurs is the second outlet ( 135 may be discharged to the outside of the hybrid heat exchanger (100). That is, the fluid moving in the inner space of the second tank outer cylinder 130 moves outside the hybrid heat exchanger 100 in a state in which the third heat exchange occurs as the combustion gas burned in the burner 111 moves to the maximum temperature. Can be discharged.

The second tank outer cylinder 130 blocks a portion of the inner space of the second tank outer cylinder 130 so that the fluid introduced through the second inlet 131 moves to the second discharge unit 135 with turbulent flow. At least one second flow guide 133 coupled to each other may be included. For example, the second flow guide 133 may have a plate shape narrower than the width of the inner space of the second tank outer cylinder 130 and may be coupled to the inner space of the second tank outer cylinder 130. Therefore, when the fluid does not move to the entire inner space of the second tank outer cylinder 130 and passes through the portion in which the second flow guide 133 is installed, the fluid moves to a narrow width space so that turbulent flow occurs, thereby improving heat exchange efficiency. Can be.

2 is a view showing the flow of the fluid in the hybrid heat exchanger 100 of Figure 1, Figure 3 is a view showing the flow of the combustion gas in the hybrid heat exchanger 100 of FIG.

1 to 3, fluid may be introduced from the outside of the hybrid heat exchanger 100 through the first inlet 121 of the first tank outer cylinder 120. The fluid may be direct water flowing from the outside of a boiler, a water heater, or the like, or may be hot water passed through another heat exchanger. The fluid introduced through the first inlet 121 may move the inner space of the first tank outer cylinder 120 from the lower side to the upper side thereof, such that primary heat exchange may occur. That is, the primary heat exchange of the fluid moving in the inner space of the first tank outer cylinder 120 may occur by the combustion gas ② moving from the upper portion of the inner tank 110 to the lower direction.

As such, the fluid in which the primary heat exchange occurs is introduced into the tube tube 113 through the first discharge part 125 of the first tank outer cylinder 120, and moves along the tube tube 113. . Even in this case, the temperature may be further increased while the secondary heat exchange of the fluid moving through the tube tube 113 occurs by the combustion gas ② moving downward from the upper portion of the tank inner tube 110. For example, as shown in FIG. 2, the tube tube 113 has a fin tube structure, and thus, a plurality of fins which may increase heat exchange efficiency may be coupled to the tube tube so that the first tank outer cylinder 120 may have a fin tube structure. The heat transfer efficiency can be increased by supplementing the insufficient heat transfer area of the second tank outer cylinder 130. In addition, when the tube tube 113 has a double spiral structure, the fluid introduced into the tube tube 113 first moves from the top to the lower direction through the tube tube 113 on the outside, and then the tube tube 113 on the inner side. The heat exchange efficiency can be increased by moving from the bottom to the upper direction through). Also in this case, as shown in FIG. 2, the tube tube 113 has a fin tube structure and has a double spiral structure, thereby further increasing heat exchange efficiency. However, the present invention is not limited to this case, and may move from the upper to the lower direction through the inner tube tube, and then move from the lower to the upper direction through the outer tube tube, as well as other spiral structures. You may have

As such, the fluid having the second heat exchanger having the elevated temperature is introduced into the inner space of the second tank outer cylinder 130 through the second inlet 131, and the inner space of the second tank outer cylinder 130 is moved upward from the lower side. The third heat exchange can take place as it moves to. That is, the third heat exchange of the fluid moving in the inner space of the second tank outer cylinder 130 is caused by the combustion gas ① moving from the upper portion of the inner tank 110 to the lower direction so that the fluid of the highest temperature is the second. It may be discharged to the discharge unit 135. In addition, the combustion gas ③ may be discharged to the combustion gas discharge portion at the lower end of the tank inner tube 110 via the second combustion guide 117.

Therefore, the present invention adopts only the advantages of the heat exchanger having high thermal efficiency and the associated heat exchanger which can reduce the pressure drop due to the smaller pressure difference between the inlet and the outlet than the water pipe type. And the disadvantages of the associated heat exchanger. As the fluid moves, heat exchange occurs three times, after the first heat exchange with the lowest efficiency, and after the second heat exchange with higher efficiency, and afterwards through the third heat exchange with the highest efficiency, the heat exchange efficiency can be maximized. have. In addition, heat exchange occurs in the fluid in the inner space of the first tank outer cylinder 120 and the second tank outer cylinder 130 as well as the tube tube 113 to store a large amount of fluid to maximize the fluid storage capacity of the heat exchanger. You can.

As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not intended to limit the scope of the invention as defined in the claims or the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (7)

Inner tank of the burner and tube tube of the combustion method is coupled to the inner space and the tube tube is located below the burner;
It is coupled to surround the outside of the tank, the inner space is formed, the fluid flowing through the first inlet formed in the lower portion is moved through the inner space and the first discharge portion formed in the upper is connected to the tube tube A first tank outer cylinder for discharging fluid into the tube tube; And
Surrounding the outside of the tank inner cylinder corresponding to the position of the burner and separated and coupled to the first tank outer cylinder at the upper portion of the first tank outer cylinder, an empty space is formed therein, the second inlet formed at the bottom And a second tank outer cylinder through which the fluid introduced from the tube tube moves through the inner space and discharges the fluid through a second discharge part formed at an upper portion thereof.
Combustion gas combusted in the burner moves from the upper portion of the inner tank to the lower direction,
The first heat exchange occurs while the fluid introduced from the first tank outer cylinder through the first inlet moves to the first outlet through the inner space of the first tank outer cylinder, and the tube of the inner tank is connected to the first outlet. As the fluid introduced into the tube moves through the tube tube, a secondary heat exchange occurs with higher efficiency than the primary heat exchange, and the fluid introduced into the second tank outer tube from the tube tube forms an inner space of the second tank outer cylinder. And a third heat exchange having higher efficiency than the second heat exchange occurs while moving to the second discharge portion. delete The method of claim 1, wherein the first tank outer cylinder,
Hybrid heat exchanger characterized in that coupled to the tank surrounding the portion corresponding to the position of the tube tube. The method of claim 1, wherein the tube tube,
The hybrid heat exchanger is helically coupled to the inner space of the tank, and has a fin tube shape in which a plurality of fins are coupled. The method of claim 1, wherein the first tank outer cylinder,
And at least one first flow guide coupled to block a portion of the inner space of the first tank outer cylinder such that the fluid introduced through the first inlet moves to the first outlet while performing turbulent flow. Hybrid heat exchanger. The method of claim 1, wherein the second tank outer cylinder,
And at least one second flow guide coupled to block a portion of the inner space of the second tank outer cylinder so that the fluid introduced through the second inlet moves to the second outlet while performing turbulent motion. Hybrid heat exchanger. The tank inner cylinder,
A first combustion guide having a plurality of through holes formed between the burner and the tube tube in an empty space therein and a second combustion guide having a plurality of through holes formed between the lower end of the inner cylinder and the combustion gas discharge unit; Hybrid heat exchanger, characterized in that.

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