KR100798629B1 - Apparatus for boiler heat exchanging with multi pass structure for combustion gas - Google Patents

Abstract

A heat exchanging apparatus with a multi pass structure for combustion gas is provided to re-combust combustion gas efficiently by contacting a spiral inner pipe with an outer pipe directly among a plurality of combustion heating units. A heat exchanging apparatus with a multi pass structure for combustion gas comprises a central flue(110), an upper water tank(170), a lower water tank(180), a plurality of inner pipes(161) and outer pipes(162), and three combustion heating units(120,130,140). The central flue is provided with a downward combustion burner at its top. The upper water tank is installed around the top of the central flue. The lower water tank is positioned down the upper water tank. The inner and outer pipes are aligned between the upper water tank and the lower tank, separated from one another. The first combustion heating unit is fastened to the bottom of the upper water tank and to the top of the lower water tank, respectively. The first combustion unit is formed around the central flue, surrounding the inner pipes. The outer pipes are placed between the second combustion heating unit and the third combustion heating unit. The first heating unit has the central flue including a first passing hole(111) at the top or the bottom thereof. The first combustion heating unit includes a second passing hole(121) formed at the bottom or the top thereof, facing the first passing hole. The second combustion heating unit includes a third passing hole(131) formed at the top or the bottom thereof, facing the second passing hole. The third combustion heating unit includes a fourth passing hole(141) formed at the top of the bottom thereof, facing the third passing hole.

Description

Apparatus for boiler heat exchanging with multi pass structure for combustion gas}

1 is a view of the main heat exchanger of the domestic boiler according to the prior art.

2 is a cross-sectional view of a boiler heat exchanger having a combustion gas multiple passage structure according to an embodiment of the present invention.

3 is a cross-sectional view taken along the line A-A shown in FIG. 2.

4 is a cross-sectional view taken along the line B-B shown in FIG. 2.

5 is a view for explaining the flow of heating water according to an embodiment of the present invention.

6 is a view for explaining the combustion gas flow in accordance with an embodiment of the present invention.

Description of the main parts of the drawing

20: burner 110: central year

120: first combustion heating unit 130: second combustion heating unit

140: third combustion heating unit 150: shell

161: inner side connection 162: outer side connection

170: upper blister 180: lower blister

The present invention relates to a boiler heat exchanger having a combustion gas multiple passage structure.

In general, a domestic boiler is installed on one side for efficiency of the installation space, that is, space efficiency, or may be installed by being attached to a wall such as a wall-mounted type.

Conventional low-boiling boilers have abundant water capacity and can increase hot water capacity, but since the size of the heat exchanger is large to cover the water capacity and the hot water capacity, the boiler occupies a large space and is difficult to install as a wall-hung type. .

To this end, the present applicant has developed a domestic boiler that can separate the functions of the low-heat type heat exchanger into the main heat exchanger and the heat storage tank and embed the hot water coil in the heat storage tank to secure abundant water supply capacity and hot water capacity.

As shown in Fig. 1, the main heat exchanger 1 according to the prior art is mounted to be able to mount the downward burner 3 above the cylindrical body 2. Here, the burner 3 has a downward combustion structure used for an inverted boiler type. The heating water inlet 4 is formed below the body 2, and the heating water discharge port 5 is formed above the body 2. The heating water drawn in from the heat storage tank through the heating water inlet 4 is heated inside the main heat exchanger 1, and then discharged again into the heat storage tank through the heating water discharge port 5. Inner upper and lower ends of the body 2 are provided with an upper water chamber 7 and a lower water chamber 6 each composed of a single body. At this time, the upper and lower water chambers 7 and 6 are communicated by the plurality of outer water pipes 8 and the plurality of inner water pipes 9. Moreover, the heating cylinder 10 is arrange | positioned in the center of the main heat exchanger 1. In addition, one inner heating plate 11 is interposed between the outer water pipe 8 and the inner water pipe 9. And the main heat exchanger 1 has the flow direction b of the heating water which goes below it upwards.

However, the main heat exchanger according to the prior art is configured in a single circuit manner in which the heating water flows in a single direction as in the flow direction. That is, the heating water flows into the lower chamber through the heating water inlet, flows toward the upper chamber through the outer water pipe and the inner water pipe, and then exits to the heating water discharge port. Therefore, the main heat exchanger of the prior art has a relatively very low heat exchange performance because the flow distance of the heating water passing through the outer and inner water pipes is short.

In addition, since the conventional main heat exchanger has one inner heating plate, it is difficult to induce reburning, and the inner heating plate itself is also interposed in a non-contact state with the outer water pipe or the inner water pipe, so that the additional heat amount obtained while reburning the combustion gas. It has a very inefficient disadvantage in delivering to the inner or outer water pipe.

In addition, the conventional main heat exchanger has a relatively short flue gas flow path, so that the downward combustion gas flows upwardly simply by exchanging heat with a plurality of simply arranged inner and outer water pipes and immediately exits through the exhaust duct. Therefore, heat exchange efficiency falls.

In addition, the conventional main heat exchanger has a simple tube-shaped outer water pipe and the inner water pipe, there is a disadvantage that the heat transfer area is relatively small.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, the flow path length of the combustion gas by arranging a plurality of combustion heating parts having different diameters, such as the ring-shaped between the shell and the central flue In order to provide a boiler heat exchanger having a combustion gas multi-pass structure capable of maximizing the heat transfer area and increasing the combustion performance by increasing the relative temperature.

In addition, another object of the present invention is that the combustion gas is spirally raised and lowered along the associated surface by directly contacting the inner tube and the outer tube, which is a spiral type tube member, between the plurality of combustion heaters. It is intended to provide a boiler heat exchanger having a combustion gas multi-pass structure having efficient combustion and maximization of heat transfer area, and maximizing combustion performance and eco-friendliness.

Objects of the present invention as described above, the central flue with a downward combustion burner mounted on the upper side; An upper blister installed around an upper side of the central year; A lower blister disposed vertically downward of the upper blister; A boiler heat exchanger having a combustion gas multi-pass structure including a plurality of inner and outer pipes which are connected to each other through the upper blister and the lower blister but formed in a concentric manner and spaced apart from each other, the bottom surface of the upper blister The first combustion heating unit fixed to the upper surface of the lower blister, each having a shape of a virtual circumscribed circle connecting the outer periphery of the inner associating spaced outwards along the radial direction with respect to the central year, the outer associated of A second combustion heater having a shape of a virtual inscribed circle connecting the outer periphery and a third combustion heater having a shape of a virtual circumscribed circle connecting the outer periphery of the outer periphery, wherein the first passage is formed above or below the central year; A second passage hole is formed in the lower portion or the upper portion of the first combustion heating portion corresponding to the hole, and the second passage hole The third through hole is formed in the upper or lower portion of the second combustion heating portion corresponding to the fourth through hole in the lower or upper portion of the third combustion heating portion corresponding to the third through hole. A boiler heat exchanger having a combustion gas multiple pass structure is achieved.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

As shown in Figure 2, the boiler heat exchanger having a combustion gas multi-pass structure of the present invention will be understood as the embodiment 100 applicable to the gas boiler, will be more clearly understood through the detailed description below.

For reference, the gas boiler includes a gas burner, a blower / blower, a water hammer absorber, a water pump device, an open expansion tank, a gas leak detector, and a control device.

Embodiment 100 of the present invention is installed between the conventional gas boiler transmission / blower and the water pump device, to implement a down-burning burner (20, hereinafter referred to as "burner") to ensure high efficiency performance. Mounted above the example 100, the combustion gas is generated downward.

Combustion gas generated in the burner 20 flows downward through the central flue 110 disposed in the center of the present embodiment 100, but as described below, after passing through the combustion gas multiple passage structure, the exhaust duct ( Through 21) to the outside. Here, the burner 20 is mounted on the upper side of the central year (110).

The combustion gas multi-pass structure is realized by arranging a plurality of combustion heating parts having different diameters in a ring-like shape between the central flue 110 and the outer shell of the boiler heat exchanger (hereinafter referred to as 'shell'). . The combustion gas multi-pass structure provides a plurality of passage holes through the central flue 110 and the combustion heating unit to relatively increase the flow path length of the combustion gas in this embodiment 100 and to induce reheating and complete combustion of the combustion gas. In zigzag means a structure arranged and formed. Here, the through hole is the first through hole 111 formed in the lower portion of the central flue 110, the second through hole 121 formed in the upper portion of the first combustion heating part 120, the second combustion is It refers to the third through hole 131 formed in the lower portion of the heat unit 130 and the fourth through hole 141 formed in the upper portion of the third combustion heating unit 140.

Combustion heating unit is a first combustion heating unit 120, a second combustion heating unit 130, having a cylindrical shape of proportional size arranged in a layer with a spaced interval spaced outward in the radial direction with respect to the central flue 110, It means the third combustion heating unit 140. That is, the first combustion heating unit 120 has a shape of a virtual circumscribed circle connecting the outer circumference of the inner tube 161, and the second combustion heating unit 130 has a shape of the virtual inscribed circle connecting the outer circumference of the outer tube 162. The third combustion heating unit 140 has a shape of a virtual circumscribed circle connecting the outer circumference of the outer tube 162. In this case, the upper and lower ends of each of the central flue 110 and the first, second, and third combustion heaters 120, 130, and 140 are welded to the bottom of the upper blister 170 and the upper surface of the lower blister 180, respectively. Is fixed in such a way.

The upper blister 170 is installed around the upper side of the central year (110). Between the upper blister 170 and the lower blister 180, a plurality of inner tube 161 and an outer tube 162 are arranged as spiral type tube members.

The inner tube 161 and the outer tube 162 are made of copper or stainless steel to double the heat exchange effect. The inner tube 161 and the outer tube 162 are airtightly arranged in all parts except the flow space of the combustion gas in the second chamber and the fourth chamber, respectively, to secure sufficient water supply capacity as the low-heat type heat exchanger, and to heat the ondol. Suitable for

The upper blister 170 and the lower blister 180 pass through each other through the inner tube 161 and the outer tube 162. Each inner tube 161 is contacted with each other on the outer circumferential surface of the central flue 110 and are spaced apart from each other while forming a concentric array. Each of the outer tube 162 is spaced apart from each other while being in contact with each other on the outer circumferential surface of the second combustion heating unit 130 in a concentric manner.

The upper blister 170 has a double tube shape. In contrast, the lower blister 180 has a single chamber shape. For example, the lower blister 180 is formed so that the left and right sides of the lower blister 180 penetrate each other while maintaining an upper and lower interval g based on the upper and lower surfaces of the central portion thereof, and the lower blister 180 toward the outer diameter side thereof. It has a shape in which the thickness of is gradually increased like a step. Accordingly, the lower blister 180 is present with the heating water introduced through the outer tube 162 and the heating water to be discharged through the inner tube 161.

In contrast, the upper blister 170 separates the internal space of the upper blister 170 through the partition wall 171. This is further clarified through FIG. Referring to FIG. 3, the upper blister 170 has a heating water inlet space 172, such as a large diameter ring-shaped tube, and a heating water discharge space 173, such as a small diameter ring-shaped tube. These spaces 172 and 173 are separated from each other by the partition wall 171. Here, the upper end of each of the inner tube 161 is connected in a concentric manner in the heating water discharge space 173 while penetrating through the associated holes spaced apart from each other.

In addition, the upper end of each outer tube 162 is connected to the through-holes spaced apart from each other while forming a relatively larger concentric arrangement in the heating water inlet space 172. Meanwhile, the heating water inlet pipe 174 is piped through the outer wall of the upper blister 170 so as to supply the returned heating water to the heating water inlet space 172 of the upper blister 170. In addition, the heating water discharge pipe 175 passes through the outer wall of the upper blister 170 in an airtight manner so as to discharge the heated heating water to the outside through the outer tube 162, the lower blister, and the inner tube 161 in order. After being piped through the partition 171.

2 and 4, the central year 110 forms a first chamber 119 corresponding to an inner space thereof. The central year 110 forms a plurality of first through holes 111 for passing the combustion gas at an end portion (for example, a lower end portion) in the opposite direction based on the position of the burner 20.

The first combustion heating unit 120 has a diameter relatively larger than the diameter of the central flue 110 so as to form the second chamber 129 on the outside of the central flue 110. Here, the second chamber 129 is connected to the first chamber 119 of the central year 110 through the first through hole 111. The first combustion heater 120 forms a plurality of second passage holes 121 for passing the combustion gas at an end portion (for example, an upper end portion) opposite to the first passage hole 111. The inner tube 161 is in contact with the inner circumferential surface of the first combustion heating unit 120 and the outer circumferential surface of the central flue 110 in the second chamber 129. The first combustion heating unit 120 serves as a kind of heat transfer plate to induce the recombustion of the combustion gas, maximizing the combustion performance and become an environmentally friendly product.

The second combustion heating unit 130 has a diameter relatively larger than the diameter of the first combustion heating unit 120, so that the third combustion heating unit 130 and the first combustion heating unit 120 have a third diameter. The chamber 139 is formed. Here, the third chamber 139 is connected to the second chamber 129 through the second through hole 121. The second combustion heating unit 130 forms a plurality of third passing holes 131 for passing the combustion gas at an end portion (for example, a lower end portion) opposite to the second through hole 121. In addition, the combustion gas may descend inside the third chamber 139. The second combustion heating unit 130 serves as a multiple heating plate together with the first combustion heating unit 120 to maximize the recombustion of combustion gas.

The third combustion heating unit 140 has a diameter relatively larger than the diameter of the second combustion heating unit 130, and thus, the third combustion heating unit 140 is disposed between the third combustion heating unit 140 and the second combustion heating unit 130. The chamber 149 is formed. Here, the fourth chamber 149 is connected to the third chamber 139 through the third through hole 131. The third combustion heating unit 140 forms a plurality of fourth through holes 141 through which the combustion gas passes through an end portion (for example, an upper end portion) opposite to the third through hole 131. The outer tube 162 is in contact with the inner circumferential surface of the third combustion heating unit 140 and the outer circumferential surface of the second combustion heating unit 130 in the fourth chamber 149. The third combustion heating unit 140 serves as a multiple heating plate together with the first and second combustion heating units 120 and 130 to further maximize the recombustion of the combustion gas.

The outer shell 150 has a diameter relatively larger than the diameter of the third combustion heating unit 140 to form a fifth chamber 159 between the outer shell 150 and the third combustion heating unit 140. Here, the fifth chamber 159 is connected to the fourth chamber 149 through the fourth through hole 141. In addition, the fifth chamber 159 may be connected to the space of the exhaust duct 21 to discharge the combustion gas to the outside.

5 is a view for explaining the heating water flow (f1) according to an embodiment of the present invention, to clarify the heating water flow (f1) direction burner, the central flue, the first to third burner heating unit, the shell, etc. The illustration of was omitted. Referring to Figure 5, the heating water flow (f1) of the present invention is configured in a two-circuit manner has a large heat exchange effect. That is, the returned heating water is first heated while entering the lower blister 180 downward through the heating water inlet pipe 174, the heating water inlet space 172 of the upper blister 170, and the outer side connection 162. The heating water of the lower blister 180 flows upward through the inner tube 161 having a pressure relatively lower than the internal pressure of the outer tube 162 during circulation of the heating water, and then heats the upper blister 170. It is supplied to the outside through the water discharge space 173 and the heating water discharge pipe 175.

6 is a view for explaining the combustion gas flow (f2) according to an embodiment of the present invention, in order to clarify the direction of the combustion gas flow (f2) omitted the illustration of the upper blister, lower blister, inner tube, outer tube, etc. It was. Referring to FIG. 6, the combustion gas flow f2 of the present invention is a multi-pass structure of combustion gas by a plurality of passage holes as described above, and the flow path is long so that the combustion gas is sufficiently exchanged and discharged.

That is, the combustion gas which is burned upside down in the burner descends along the first chamber 119 corresponding to the internal space of the central year. Combustion gas descending down flows into the lower portion of the second chamber 129 through the first through hole 111 from the lower portion of the first chamber 119. The introduced combustion gas flows upward from the lower portion of the second chamber 129, and at this time, ascends on the spiral surface of the inner tube and performs heat exchange with the heating water efficiently in response to the maximized heat transfer area. Combustion gas raised up is introduced into the upper portion of the third chamber 139 through the second through hole 121 from the upper portion of the second chamber 129. The introduced combustion gas descends along the third chamber 139. Combustion gas that flows down is introduced into the lower portion of the fourth chamber 149 through the third through hole 131 from the lower portion of the third chamber 139. The introduced combustion gas flows upward from the lower portion of the fourth chamber 149, and at this time, ascends on the spiral surface of the outer associated pipe, and also efficiently exchanges heat with the heating water in response to the maximized heat transfer area. The combustion gas that is raised upward flows into the upper portion of the fifth chamber 159 through the fourth through hole 141 from the upper portion of the fourth chamber 149 and then discharges through the exhaust duct.

Therefore, according to the present invention, the boiler heat exchanger having the combustion gas multiple passage structure has a plurality of combustion heating parts formed in a zigzag arrangement in a corresponding passage hole corresponding to the combustion gas multiple passage structure, and thus the flow path length of the combustion gas. Relatively increase the combustion performance by inducing the reheating and complete combustion of the combustion gas.

In addition, the boiler heat exchanger having a combustion gas multi-pass structure of the present invention has the advantage of maximizing the heat exchange effect by arranging the inner tube and the outer tube to have a two-circuit heating water flow.

In addition, the boiler heat exchanger having a combustion gas multi-pass structure of the present invention has a spiral type inner tube and an outer tube to maximize the heat transfer area, and in this case, the combustion gas is spirally raised and lowered along the associated surface. There is an advantage that can smoothly discharge the combustion gas.

In addition, the boiler heat exchanger having a combustion gas multi-pass structure of the present invention ensures sufficient water capacity as a low-heat type heat exchanger by arranging the inner and outer pipes in all parts except the flow space of the combustion gas in the chamber. There is an advantage suitable for underfloor heating.

Claims (5)

A center flue fitted with an upward combustion burner; An upper blister installed around an upper side of the central year; A lower blister disposed vertically downward of the upper blister; In the boiler heat exchanger having a combustion gas multi-pass structure including a plurality of inner tube and outer tube connected to each other while penetratingly connected between the upper blister and the lower blister to form a concentric circle. The first combustion is fixed to the bottom surface of the upper blister and the upper surface of the lower blister, respectively having a shape of a virtual circumscribed circle connecting the outer periphery of the inner associating spaced outwardly in the radial direction with respect to the central year; A heating part, a second combustion heating part having a shape of a virtual inscribed circle connecting the outer periphery of the outer associating part, and a third combustion heating part having a shape of a virtual circumscribed circle connecting the outer periphery of the outer associating part, A second through hole is formed in the lower portion or the upper portion of the first combustion heating portion in correspondence with the first through hole formed in the upper or lower portion of the central flue, and the upper portion of the second combustion heating portion corresponds to the second through hole. And a third through hole formed at a lower portion thereof, and a fourth through hole formed at a lower portion or an upper portion of the third combustion heating portion corresponding to the third through hole. The method of claim 1, The combustion heating unit, A first combustion heater having a diameter relatively larger than a diameter of the central flue so as to form a second chamber for upstream combustion gas and installation of the inner side connection outside the central flue; A second combustion heater having a diameter relatively larger than a diameter of the first combustion heater so as to form a third chamber for downward flow of combustion gas outside the second combustion heater; And a third combustion heater having a diameter relatively larger than the diameter of the second combustion heater so as to form a fourth chamber for the upward flow of combustion gas and the installation of the outer tube on the outside of the second combustion heater. Boiler heat exchanger having a combustion gas multiple pass structure. The method of claim 1, The inner tube or the outer tube is disposed in close contact with the central flue and the surface of the combustion heating unit, and the combustion gas multi-pass characterized in that the spiral-type tube member made of copper or stainless steel (stainless) material Boiler heat exchanger having a structure. The method of claim 1, The upper blister is formed by separating a heating water inlet space such as a ring-shaped tube with a large diameter and a heating water discharge space such as a ring-shaped tube with a small diameter, and pass through the outer wall of the upper blister in a gastight manner. A heating water discharge pipe piped through the partition wall; Boiler heat exchanger having a combustion gas multi-pass structure, characterized in that it comprises a heating water inlet pipe piped through the outer wall of the upper blister. The method of claim 1, The lower blister is a boiler heat exchanger having a combustion gas multi-pass structure, characterized in that the left and right of the lower blister is formed to penetrate each other while maintaining the upper and lower intervals relative to the upper and lower surfaces of the center portion.

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