KR20120045249A - Plate type heat exchanger - Google Patents

Abstract

PURPOSE: A plate-type heat exchanger is provided to improve heat transfer performance by minimizing thermal loss of a heat exchanger and to smoothly discharge exhaust gas and condensate. CONSTITUTION: A plate-type heat exchanger comprises a combustion chamber cover(11), a combustion chamber housing(13), a latent heat exchanger, an upper cap, a lower cap(50), and a circulation fluid discharge pipe(60). The combustion chamber cover comprises an internal space in which the top is opened, a circulation fluid supply part, a circulation fluid discharge part, and a burner part. The combustion housing is inserted from the top of the combustion cover and has a circulation fluid storage part and a supply hole(15). A top plate and a bottom plate are coupled to form a body of a plate. Outer connection paths(23) connecting with the supply hole are formed in both ends of the body. The combustion chamber housing comprises an inner moving path(25), outer connection paths, and combustion gas moving holes(24). The latent heat exchanger seals the outer connection paths and the combustion gas moving holes.

Description

Plate Junction Heat Exchanger {PLATE TYPE HEAT EXCHANGER}

The present invention relates to a plate-bonded heat exchanger, in which a plate plate for separately forming a combustion gas and a moving passage of a circulating fluid in a combustion chamber is laminated to be laminated to integrate a sensible and latent heat exchanger, and the circulating fluid is moved from the center to the outside. By flowing, the combustion gas is moved from the outside to the center to make heat exchange, thereby miniaturizing and ensuring a large heat transfer area, and is invented to minimize heat loss.

Boilers used for heating and hot water supply in general households are divided into general boilers and condensing boilers according to the recovery method of combustion heat for heating the heating water.

The condensing boiler is a boiler composed of a combination of a sensible heat exchanger for directly exchanging heat with a combustion unit and a latent heat exchanger for recovering latent heat of condensation contained in exhaust gas.

In the latent heat exchanger, the combustion heat of the burner is primarily absorbed and passes through a sensible heat exchanger that exchanges heat with the circulating fluid. As the condensate is generated, the discharge of the condensate is made with caution.

As described above, a general condensing boiler is composed of a sensible heat exchanger and a latent heat exchanger that absorbs combustion heat of a burner and exchanges heat with a circulating fluid, and is used as heating water passing through a sensible heat exchanger and hot water passing through a latent heat exchanger.

In recent years, in order to improve the latent heat recovery contained in the combustion gas in the latent heat exchanger, a structure in which a large number of plate plates through which the circulating fluid moves is laminated so as to increase the contact area of the combustion gas.

Such a heat exchanger is widely used while having a variety of structures for various industrial fields.

However, the existing latent heat exchanger has a difficulty in reducing heat exchange efficiency because combustion heat generated in the burner part and the plate plate are formed in parallel with each other in parallel, and the heat of combustion is discharged within a short time.

In addition, by increasing and laminating the plate plate in order to improve the heat exchange efficiency, there is a closed end in which productivity decreases due to an increase in manufacturing cost and material cost.

In addition, since the combustion gas heat exchanged in the lower portion of the plate plate is lowered in temperature as the temperature decreases, the heat transfer efficiency decreases with the upper portion of the plate plate, and the circulating fluid and heat transfer flowing in a direction perpendicular to the moving direction of the combustion plate are reduced. There was a problem with the recovery of the latent heat as a whole.

In addition, the conventional condensing boiler is composed of a sensible heat exchanger and a latent heat exchanger, and had to be manufactured and assembled, respectively, there was a difficulty in increasing the production cost and the number of processes.

The present invention solves the above problems by laminating a latent heat exchanger is formed by laminating the plate plate in the housing of the sensible heat exchanger integrally, plate production type heat exchanger to improve the productivity while reducing the manufacturing process and material costs To provide.

An object of the present invention is to provide a plate-bonded heat exchanger in which the combustion gas and the circulating fluid of the heat exchanger are moved in opposite directions to heat exchange, thereby improving heat exchange efficiency.

Another object of the present invention is to gradually reduce the cross-sectional area between spaces formed by stacking plate plates so that the exhaust gas moves, based on the exhaust hole, thereby improving the exhaust performance while increasing the flow velocity of the combustion gas moving along the space portion. It is to provide a latent heat recovery structure of a plate-bonded heat exchanger.

In order to achieve the above object,

A combustion chamber cover 11 having an inner space having an open upper portion, and having a circulating fluid supplying portion 11a and an exhausting portion 11b at side and bottom portions, and having a burner portion 12 mounted at the center of the body;

Inserted into the upper portion of the combustion chamber cover 11, bent the end of the body to be coupled to the combustion chamber cover 11, a storage portion 14 is formed to accommodate the circulating fluid is formed, the supply hole 15 in the bent portion Combustion chamber housing 13 provided;

The upper plate 21 and the lower plate 22, which are symmetrical to each other, are coupled to each other, and an outer connection passage 23 connected to the supply hole 15 is formed at both ends of the body, and the combustion gas exhaust hole 26 in the center of the body is formed. A plate plate 20 provided with a combustion gas movement hole 24 between the inner movement passage 25 surrounding the periphery and the outer connection passage 23 and the inner movement passage 25;

A plurality of plate plates 20 stacked on the combustion chamber housing 13 and a latent heat exchanger 30 configured to seal the outer connection passage 23 and the combustion gas moving hole 24 in a partitioned manner;

An upper blocking cap 40 having a combustion gas exhaust pipe 41 communicating with the combustion gas exhaust hole 26 at the center of the body by sealing and fixing the uppermost end of the latent heat exchange part 30;

A lower shielding cap 50 having a central combustion gas exhaust hole 26 at the lower end of the latent heat exchanger 30 and having a condensate discharge pipe 51 communicating with the combustion gas exhaust hole 26 at the center of the body. and;

A circulating fluid discharge pipe 60 is provided in the combustion chamber housing 13 to connect the internal movement passage 25 drain port 25b and the discharge part 11b of the combustion chamber cover 11.

In addition, the latent heat exchange part 30 is configured to be connected to the plate plate 20 in which the supply port 25a and the drain port 25b are stacked, and at least two or more plate plates 20 are drain holes 25b. The outer connecting passage 23 and the inner movable passage 25 are formed in communication with each other, and are configured to be stacked at the top end thereof.

In addition, the internal movement passage 25 of the plate plate 20 has a spiral direction at the central supply port 25a along the combustion gas exhaust hole 26 and is formed with a drain port 25b outward.

In addition, the combustion gas of the burner part 12 is moved to the combustion gas moving hole 24 of the latent heat exchange part 30 by the lower blocking cap 50, and the combustion gas formed by stacking the plate plates 20. It is moved to the combustion gas exhaust hole 26 in the center along the moving path 24a and discharged to the combustion gas exhaust pipe 41. The circulation fluid is connected to the outer connection passage in the storage unit 14 of the sensible heat exchanger 10. It flows upward along the center along the 23 and moves to the center, and is heat-exchanged with the combustion gas while moving from the center to the outside through the inner movement passage 25 again.

In addition, the latent heat exchange part 30 is welded so that the outer portions of the plate plates 20 are stacked to overlap each other, and the top plate 21 and the bottom plate 22 of the combustion gas movement hole 24 overlap each other. It is bent so that the outer connecting passage 23 is formed to be sealed.

According to the present invention having such a structure, the latent heat exchanger formed by stacking plate plates integrally formed with the upper plate and the lower plate is made integrally with the combustion chamber housing having the burner, thereby reducing the manufacturing process and material cost and improving productivity. Will be improved.

In addition, the sensible heat exchanger and the latent heat exchanger are integrally molded to provide a miniaturized heat exchanger, and the heat exchange efficiency can be increased by allowing the combustion gas and the circulating fluid to move in opposite directions and to exchange heat.

In addition, it is a very useful invention to improve the heat transfer performance while minimizing the heat loss of the heat exchanger, and to facilitate the discharge of condensate and exhaust gas to increase the commerciality.

1 is an exploded perspective view of a plate-bonded heat exchanger of the present invention.
Figure 2 is an overall cross-sectional view of the present invention plate bonded heat exchanger.
3 is a perspective view showing a plate plate of the present invention.
4 is a partially enlarged cross-sectional view of the present invention plate bonded heat exchanger.

Hereinafter, a configuration and an operation example of the present invention for achieving the above object with reference to the accompanying drawings are as follows.

The plate-bonded heat exchanger of the present invention is a plate plate that separates the combustion gas inside the combustion chamber and the moving passages of the circulating fluid to be laminated, and integrates the sensible and latent heat exchangers, and the circulating fluid flows from the center to the outside, and burns. As the gas is moved from the outside to the center, heat exchange is made, thereby miniaturizing and securing a large heat transfer area and minimizing heat loss.

The plate-bonded heat exchanger 100 of the present invention includes a sensible heat exchanger 10 having a combustion chamber housing 13 and a combustion chamber housing 13 having a burner part 12 and a plate plate 20 as shown in FIG. 1. ) Is largely composed of a latent heat exchanger (30) configured to be combined to be stacked.

The combustion chamber cover 11 has an inner space of which the upper part is open, and is provided with a circulating fluid supply part 11a and an outlet part 11b connected to the boiler components at the side and the lower part, and a burner part 12 is provided at the center of the body. It is mounted.

In addition, the combustion chamber housing 13 is also open to the upper body, the end of the body is bent and welded to seal the upper end of the combustion chamber cover 11, the circulation fluid is accommodated between the combustion chamber cover 11 and the combustion chamber housing (13). The storage unit 14, which is a space to be formed, is formed.

At this time, the bottom surface of the central portion of the combustion chamber housing 13 is joined to the combustion chamber cover 11 so that the burner portion 12 is inserted into the body through the central hole, and the sealing operation is performed when the burner portion 12 is coupled. It was sealed through.

In addition, the bottom side of the combustion chamber housing 13 is provided with a protruding portion joined to wrap around the discharge portion 11b, and a supply hole 15 is formed as a body bent portion, and the circulating fluid introduced into the supply portion 11a is discharged. It is made to move to the supply hole 15, so that it does not flow into the portion (11b).

In this way, the combustion chamber housing 13 and the combustion chamber cover 11 are joined to the upper portion of the sensible heat exchanger 10 configured to bond the latent heat exchanger 30 formed by stacking a plurality of plate plates 20.

The plate plate 20 is integrally bonded to the body of the upper plate and the lower plate 22 one plate plate 20 is completed, the body is formed to be symmetrical with each other through which the circulating fluid flows and the combustion gas is passed through Had a hole.

That is, the plate plate 20 has an outer connection passage 23 connected to the supply hole 15 at the outer portion of the body, the combustion gas moving hole 24 to which the combustion gas of the combustion chamber housing 13 is moved, The inner movement passage 25 and the combustion gas exhaust hole 26 in the center of the body connected to the outer connection passage 23 are sequentially formed.

Therefore, the latent heat exchange part 30 having the plate plate 20 laminated therein is configured such that the outer connecting passage 23, the combustion gas moving hole 24, and the combustion gas exhaust hole 26 communicate with the upper part. .

At this time, the inner movement passage 25 of the plate plate 20 is formed along the combustion gas exhaust hole 26 in a spiral direction at the inner supply port 25a and connected to the outer drain port 25b. Both the supply port 25a and the drain port 25b of the plate plate 20 are configured to communicate with each other.

The latent heat exchanger 30 configured as described above is welded so that the outer portions of the plate plates 20 to be stacked overlap each other, and the lower plate 22 stacked with the top plate 21 of the combustion gas movement hole 24 is formed. By bending to overlap each other to close the outer connecting passage 23, the circulating fluid can be moved upward.

In addition, the gap holding protrusion 22a protruding to the outer surface of the moving passage of any one of the upper plate 21 and the lower plate 22 of the plate plate 20 is provided, and when the plate plate 20 is laminated, By forming the combustion gas movement path 24a, the combustion gas which flowed into the combustion gas movement hole 24 is moved to the central combustion gas exhaust hole 26 along the combustion gas movement path 24a.

In addition, the upper blocking cap 40 is joined to the uppermost end of the latent heat exchanger 30 to shield the combustion gas movement hole 24, thereby allowing the combustion gas to move to the central combustion gas exhaust hole 26, and to block the upper portion. The combustion gas is discharged through the combustion gas exhaust pipe 41 provided at the center of the cap 40.

In addition, the plate plate 20 positioned at the lowermost end of the latent heat exchange part 30 forms a partition wall between the internal movement passages 25 and a condensate discharge pipe communicating with the combustion gas exhaust hole 26 at the center thereof. 51) was formed.

In addition, the condensate discharge pipe 51 is joined to the lower plate plate 20 at the lower end of the latent heat exchanger 30 to shield the central combustion gas exhaust hole 26 and communicate with the combustion gas exhaust hole 26 to the center of the body. By combining the lower blocking cap 50 having a), it is possible to configure the latent heat exchange unit 30 without producing a plate plate 20 formed with a partition as described above.

Accordingly, the combustion gas of the burner part 12 is moved to the outside by being blocked by the partition wall and the lower blocking cap 50 of the latent heat exchange part 30, and then moved upward along the combustion gas moving hole 24.

At this time, since the flow rate of the combustion gas heat-exchanged along the combustion gas moving path (24a) is lowered, the flow rate is reduced, the height of the gap holding projection (22a) along the center portion is smaller than 0.8mm, the combustion gas moving path to the center portion By reducing the cross-sectional area of 24a, the flow rate of the combustion gas is kept constant.

In addition, the circulation fluid discharge pipe 60 is connected to the discharge part 11b of the combustion chamber cover 11 in the combustion chamber housing 13 at the lowermost drain 25b of the latent heat exchanger 30. The circulating fluid is sensible heat exchanged with the burner part 12 again.

At this time, the circulating fluid discharge pipe 60 is heat-exchanged with the combustion gas while passing through the body of the combustion chamber housing 13, so as to be connected to the discharge part (11b) so as not to exchange heat with the circulating fluid of the storage unit (14). desirable.

That is, the lower part of the combustion chamber housing 13 is provided with a protrusion which is joined to wrap around the discharge part 11b, and the circulation fluid discharge pipe 60 is connected to the discharge part 11b in the storage part 14. Heat loss can be prevented by preventing heat exchange with the circulating fluid contained in).

Referring to the flow and operating state of the combustion gas and the circulating fluid in the plate-bonded heat exchanger 100 configured as described above are as follows.

First, when the burner unit 12 operates in the sensible heat exchanger 10 including the combustion chamber housing 13, the combustion chamber cover 11, and the burner unit 12, high temperature heat and combustion gas are generated. Initially heating the circulating fluid accommodated in (14), the combustion gas is moved to the combustion gas moving hole 24 of the latent heat exchanger (30).

In addition, since the boiler is operated and the circulating fluid is supplied from the outside through the supply part 11a, the circulating fluid accommodated in the supply part 11a and initially heated is connected to the outer connection passage of the latent heat exchange part 30 through the supply hole 15 ( Follow 23) to the top end.

The circulating fluid arriving at the uppermost end of the circulating fluid flows horizontally toward the center by the upper blocking cap 40 and flows into the supply port 25a of the latent heat exchanger 30.

The supply port 25a is formed close to the central combustion gas exhaust hole 26 in the plate plate 20, and has a spiral internal connection passage along the exhaust hole and a drain port 25b formed outside. The supply port 25a and the drain port 25b of the stacked plate plate 20 are configured to communicate with each other so that the circulating fluid flows through the supply port 25a to the lowermost plate plate 20.

At this time, in the latent heat exchange unit 30, the outer connection passage 23 and the inner movement passage 25 directly communicate with each other at least two or more plate plates 20 located at the top thereof without the drain port 25b. Allow fluid to move through supply port 25a.

That is, the circulating fluid accommodated in the storage portion, the pressure is reduced in the process of moving to the upper end of the latent heat exchanger 30, so that a difference in the supply amount may be generated, by forming only the supply port (25a) in the upper plate plate pressure The supply volume of the circulating fluid according to the decrease is kept constant.

Therefore, the circulating fluid accommodated in the storage unit 14 moves to the upper end of the body along the outer edge of the latent heat exchanger 30, and passes through the supply port 25a and the drain port 25b through the circulating fluid discharge pipe 60. The flow discharged to the outside of the heat exchanger 100 may be kept constant.

In addition, the circulating fluid is initially located in the outer connection passage 23, so that the temperature inside the heat exchanger 100 does not directly contact the outside temperature, thereby minimizing heat loss.

In addition, the combustion gas of the burner part 12 is moved to the combustion gas moving hole 24 of the latent heat exchange part 30 by the lower blocking cap 50, and the combustion gas movement formed by stacking the plate plates 20. It is moved to the combustion gas exhaust hole 26 in the center along the furnace 24a to have a flow discharged to the combustion gas exhaust pipe 41.

At this time, the outer connection passage 23 and the combustion gas moving hole 24 of the latent heat exchanger 30 are formed to be partitioned with each other, the upper portion is shielded by the upper blocking cap 40, the combustion gas exhaust gas exhaust hole in the center It is only moved to 26.

Accordingly, the circulating fluid flowing outward from the center of the plate plate 20 and the combustion gas moving from the outside to the center are heat exchanged, and the circulating fluid is circulated along the inner movement passage 25 to be moved outward to increase the heat exchange area. The heat exchange efficiency is further improved.

In addition, the cross-sectional area of the gas movement path 24a of the latent heat exchange part 30 is gradually reduced to the center part to prevent the moving speed from being reduced while the combustion gas is exchanged with the circulating fluid. To keep the moving speed uniform.

The circulating fluid heat exchanged as described above is the heat of combustion of the burner part 12 in the process of being discharged outside the heat exchanger 100 through the circulating fluid discharge pipe 60 connected to the drain port 25b at the lower end of the latent heat exchange part 30. Heat exchange was performed again.

In addition, while moving to the center of the latent heat exchange unit 30, the combustion gas of which the temperature is reduced is discharged to the outside of the heat exchanger 100 through the exhaust pipe 41, the condensate generated at this time, the condensate discharge pipe 51 of the lower end Since it is provided through this burner part 12, the discharge | emission of condensate can be minimized by the heat of combustion.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. It will be clear to those who have.

10-sensible heat exchanger 11-combustion chamber cover
11a-supply section 11b-discharge section
12-Burner 13-Combustion Chamber Housing
14-reservoir 15-supply hole
20-Plate Plate 21-Top Plate
22-Bottom plate 23-Outer connecting passage
24-combustion gas movement hole 24a-combustion gas movement furnace
25-Inner passage 25a-Supply port
25b-Drain 26-Combustion gas exhaust hole
30-latent heat exchanger 40-upper blocking cap
41-Combustion gas exhaust pipe 50-Lower shut off cap
51-condensate discharge line 60-circulating fluid discharge line
100-plate junction heat exchanger

Claims (13)

A combustion chamber cover 11 having an inner space having an open upper portion, and having a circulating fluid supplying portion 11a and an exhausting portion 11b at side and bottom portions, and having a burner portion 12 mounted at the center of the body;
Inserted into the upper portion of the combustion chamber cover 11, bent the end of the body to be coupled to the combustion chamber cover 11, a storage portion 14 is formed to accommodate the circulating fluid is formed, the supply hole 15 in the bent portion Combustion chamber housing 13 provided;
The upper plate 21 and the lower plate 22, which are symmetrical to each other, are coupled to each other, and an outer connection passage 23 connected to the supply hole 15 is formed at both ends of the body, and the combustion gas exhaust hole 26 in the center of the body is formed. A plate plate 20 provided with a combustion gas movement hole 24 between the inner movement passage 25 surrounding the periphery and the outer connection passage 23 and the inner movement passage 25;
A plurality of plate plates 20 stacked on the combustion chamber housing 13 and a latent heat exchanger 30 configured to seal the outer connection passage 23 and the combustion gas moving hole 24 in a partitioned manner;
An upper blocking cap 40 having a combustion gas exhaust pipe 41 communicating with the combustion gas exhaust hole 26 at the center of the body by sealing and fixing the uppermost end of the latent heat exchange part 30;
A lower shielding cap 50 having a central combustion gas exhaust hole 26 at the lower end of the latent heat exchanger 30 and having a condensate discharge pipe 51 communicating with the combustion gas exhaust hole 26 at the center of the body. and;
Plate-bonded heat exchanger, characterized in that the circulating fluid discharge pipe 60 is connected in the combustion chamber housing 13 to connect the internal movement passage 25 drain port 25b and the discharge portion 11b of the combustion chamber cover 11. group.
The plate-heat exchanger of claim 1, wherein the latent heat exchanger (30) is configured such that the supply port (25a) and the drain port (25b) of the plate plate (20) to be stacked are connected in communication with each other.
The method of claim 1, wherein the latent heat exchange unit 30, the at least two or more plate plate 20 is formed so that the outer connection passage 23 and the internal movement passage 25 in communication without the drain port 25b at the top end Plate-junction heat exchangers characterized by stacking
The internal movement passage 25 of the plate plate 20 has a spiral direction at a central supply port 25a along the combustion gas exhaust hole 26 and a drain port 25b is formed outside. Plate-bonded heat exchanger.
The combustion gas of the burner part 12 is moved to the combustion gas moving hole 24 of the latent heat exchange part 30 by the lower blocking cap 50, and the plate plate 20 is laminated. And a plate-bonded heat exchanger, which is moved to the combustion gas exhaust hole 26 in the center along the formed combustion gas moving path 24a and discharged to the exhaust pipe 41.
The method of claim 1, wherein the circulating fluid flows from the storage unit 14 of the sensible heat exchanger 10 to the upper portion along the outer connecting passage 23 to move to the center, and at the center through the inner movement passage 25 again. The plate-bonded heat exchanger, characterized in that the heat exchange with the combustion gas while moving to the outside.
The method of claim 1, wherein the latent heat exchanger 30 is welded so that the outer portions of the plate plate 20 to be laminated overlap each other, and the lower plate 22 laminated with the upper plate 21 of the combustion gas movement hole 24. The plate-joined heat exchanger is bent to overlap each other and the outer connection passage 23 is formed to be hermetically sealed.
The method according to claim 1, wherein the gap retaining projection (22a) protruding to the outer surface of any one of the upper plate 21 and the lower plate 22 of the plate plate 20 is formed to form a combustion gas moving path (24a) A plate-bonded heat exchanger. The plate-bonded heat exchanger according to claim 1, wherein the condensed water discharge pipe (51) formed at the center of the lower blocking cap (50) is installed to extend through the burner unit (12) to the outside of the combustion chamber.
The method of claim 1, wherein the circulating fluid discharge pipe 60 is heat-exchanged with the combustion gas while passing through the body of the combustion chamber housing 13, and is connected to the discharge part (11b) so as not to exchange heat with the circulating fluid of the storage unit (14). Plate-bonded heat exchanger characterized in that.
The plate-attached heat exchanger according to claim 1, wherein the latent heat exchange part (30) is formed by laminating a plate plate (20) to reduce the cross-sectional area of the combustion gas movement path (24a) to the center part.
The bottom plate plate 20 of the latent heat exchange unit 30, the partition wall is formed between the inner movement passage 25, the condensate discharge pipe in communication with the combustion gas exhaust hole 26 in the center ( 51) is a plate-bonded heat exchanger characterized in that formed. The plate-bonded heat exchanger according to claim 1, wherein the plate plates (20) are laminated and molded with a gap of 0.8 ± 0.5 mm.

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