DE202021101388U1 - Condensing heat exchanger - Google Patents

Abstract

Condensing heat exchanger which is used for a burner (2), the condensing heat exchanger comprising a housing (1) and a heat exchange structure received in the housing 81), characterized in that the heat exchange structure comprises at least two heat exchange coiled tubes which form a spiral cylindrical structure are wound, wherein one heat exchange coil tube of the at least two heat exchange coil tubes forms a first cylinder body, while the other heat exchange coil tube forms a second cylinder body, and wherein the burner (2) is arranged inside the first cylinder body, and wherein the second cylinder body on the outside of the first cylinder body is placed, and wherein a water inlet connection (8) and a water outlet connection (7) are arranged on the housing (1), and wherein one end of the heat exchange coil tube is connected to the water inlet connection (8), while the other end e of the heat exchange coil tube is connected to the water outlet port (7).

Description

TECHNICAL AREA

The present application relates to the field of heat exchangers, in particular a condensing heat exchanger.

STATE OF THE ART

The heat exchanger is a widely used energy conversion device and uses the chemical energy that is released after the fuel is burned, i.e. the heat energy of the high-temperature flue gas. The heat transfer process transfers the energy to the water in the heat exchanger so that the water absorbs heat and becomes hot water.

In view of the related technologies mentioned above, the inventor believes that the heat exchange efficiency of the heat exchange pipe in the actual heat exchanger is not high during use and the contact area of the discharged flue gas is small, so an ideal heat exchange effect cannot be obtained.

CONTENT OF THE PRESENT INVENTION

In order to improve the heat recovery efficiency of the flue gas of the heat exchanger, the present application provides a condensing heat exchanger.

• einen kondensierenden Wärmeaustauscher, der für einen Brenner verwendet wird, wobei der kondensierende Wärmeaustauscher ein Gehäuse und eine in dem Gehäuse aufgenommene Wärmeaustauschstruktur umfasst, und wobei die Wärmeaustauschstruktur zumindest zwei Wärmeaustauschschlangenrohre umfasst, die zu einer spiralförmigen zylindrischen Struktur gewickelt sind, und wobei ein Wärmeaustauschschlangenrohr von den zumindest zwei Wärmeaustauschschlangenrohren einen ersten Zylinderkörper bildet, während das andere Wärmeaustauschschlangenrohr einen zweiten Zylinderkörper bildet, und wobei der Brenner im Inneren des ersten Zylinderkörpers angeordnet ist, und wobei der zweite Zylinderkörper am Äußeren des ersten Zylinderkörpers aufgesetzt ist, und wobei an dem Gehäuse ein Wassereinlassanschluss und ein Wasserauslassanschluss angeordnet sind, und wobei ein Ende des Wärmeaustauschschlangenrohrs mit dem Wassereinlassanschluss verbunden ist, während das andere Ende des Wärmeaustauschschlangenrohrs mit dem Wasserauslassanschluss verbunden ist.

A condensing heat exchanger according to the present application provides the following technical solution:

• a condensing heat exchanger which is used for a burner, the condensing heat exchanger comprising a housing and a heat exchange structure received in the housing, and wherein the heat exchange structure comprises at least two heat exchange coil tubes wound into a spiral cylindrical structure, and wherein a heat exchange coil tube of the at least two heat exchange coil tubes forms a first cylinder body, while the other heat exchange coil tube forms a second cylinder body, and wherein the burner is arranged inside the first cylinder body, and wherein the second cylinder body is placed on the outside of the first cylinder body, and a water inlet connection and on the housing a water outlet port are arranged, and wherein one end of the heat exchange coil tube is connected to the water inlet port, while the other end of the heat exchange coil tube is connected to the connected to the water outlet port.

Using the above technical solution, the water entered through the water inlet port is divided in the water inlet port, the divided water entering each heat exchange coil tube. As the water flows through the heat exchange coiled tube, the water dissipates the heat inside the housing to realize heat exchange. By arranging a plurality of heat exchange coil tubes and nesting the heat exchange coil tubes one inside the other, the heat is gradually absorbed to improve the heat recovery efficiency of the flue gas of the heat exchanger.

Optionally, the housing includes an upper end cover, a lower end cover, and a cylinder body located between the upper end cover and the lower end cover, the upper end and the lower end of the cylinder body being open, and the cylinder body between the upper end cover and the lower end cover End cover is tightly pressed and secured, and wherein the upper end cover and the lower end cover are detachably connected to one another by a connector.

Using the above technical solution, the housing is split in order to install the heat exchange coil tube inside the housing.

Optionally, an upper annular embedding groove is provided on a side face of the upper end cover facing the cylinder body, while a lower annular embedding groove is provided on a side face of the lower end cover facing the cylinder body, the upper end of the cylinder body protruding into the upper embedding groove, while the lower end of the cylinder body protrudes into the lower embedding groove.

Using the above technical solution, the upper end of the cylinder body protrudes into the upper embedding groove, while the lower end of the cylinder body protrudes into the lower embedding groove, when the upper end cover and the lower end cover clamp and fix the cylinder body, the relative positions of the upper End cover, lower end cover and cylinder body fixed, so that the relative positions do not tend to change during use.

At the positions opposite to the heat exchange coil tubes on a side surface of the upper end cover facing the cylinder body and a side surface of the lower end cover facing the cylinder body, a clamping groove is provided in each case, the upper end of the heat exchange coil tube being in the clamping groove of the upper end cover, while the lower End of the heat exchange coil tube is in the clamping groove of the lower end cover.

Using the above technical solution, the upper end of the heat exchange serpentine tube is clamped in the upper embedding groove, the lower end of the heat exchange serpentine tube in the clamping groove of the upper end cover and the lower end of the heat exchange serpentine tube in the clamping groove of the lower end cover, so that the position of the heat exchange serpentine tube is fixed That way, the heat exchange coiled tube is not prone to fluctuations as the water flows through its interior.

Optionally, at a position opposite to the burner of the lower end cover, an installation hole is provided, on which a heat insulating element made of refractory material is arranged, wherein a pressure cover is arranged on an outer surface of the lower end cover, which the heat insulating element between the pressure cover and the lower end cover tightly pressed and fastened, and wherein the pressure cap is detachably connected to the lower end cover by a connector.

Using the above technical solution, the heat insulating element and the burner face each other when the burner is ignited in order to prevent the heat from being transferred to the lower end cover, thus providing protection for the lower end cover as the When the heat-insulating element is installed in the installation hole, the heat-insulating element can be replaced after long-term use by removing the pressure cap.

Optionally, a conversion connection is arranged at an end of the water inlet connection and the water outlet connection facing away from the housing, an end of the conversion connection facing away from the water inlet connection or the water outlet connection being designed as a structure of the round tube.

Using the above technical solution, the water inlet connection and the water outlet connection can be coupled to an existing circular water pipeline.

Optionally, the conversion connection can be detachably connected to the water inlet connection and the water outlet connection.

Using the above technical solution, the conversion port can be installed on the water inlet port or the water outlet port, or detached from the water inlet port and the water outlet port, as needed.

Optionally, the conversion connection comprises a shunt section and a confluence section, wherein the confluence section adopts a round tube structure, the two ends of which are designed to be open, and wherein shunt channels are arranged in the interior of the shunt section in the same number as the heat exchange coil tubes, and wherein the shunt channels with the inner hole of the Confluence section are connected, and wherein the shunt channels inside the shunt section form a one-to-one correspondence with the heat exchange coil tubes and are connected thereto.

Using the above technical solution, when the water enters the conversion connection, it is divided into the shunt channels in the shunt section, then the water flows along the shunt channels into the corresponding heat exchange coil pipe.

Optionally, channels are arranged in the interior of the water inlet connection and the water outlet connection, the number of which adapts to the heat exchange coil pipes.

Using the above technical solution, as the water enters the water inlet port, it is divided through the channels in the water inlet port, and the divided water enters the corresponding heat exchange coil tube. The water after the heat exchange through the heat exchange coil pipe can flow out of the respective channel.

1. 1. das durch den Wassereinlassanschluss eingetretene Wasser wird in dem Wassereinlassanschluss aufgeteilt, wobei das aufgeteilte Wasser jeweils in jedes Wärmeaustauschschlangenrohr eintritt; wenn das Wasser durch das Wärmeaustauschschlangenrohr strömt, leitet das Wasser die Wärme im Inneren des Gehäuses ab, um einen Wärmeaustausch zu realisieren; dadurch, dass mehrere Wärmeaustauschschlangenrohre angeordnet und die Wärmeaustauschschlangenrohre ineinander eingeschachtelt sind, wird die Wärme schrittweise absorbiert, um die Wärmerückgewinnungseffizienz des Rauchgases des Wärmeaustauschers zu verbessern,
2. 2. das Gehäuse ist geteilt angeordnet, um das Wärmeaustauschschlangenrohr im Inneren des Gehäuses zu installieren;
3. 3. wenn der Brenner gezündet ist, liegen das wärmeisolierende Element und der Brenner zueinander gegenüber, um zu verhindern, dass die Wärme an die untere Endabdeckung übertragen wird, auf die Weise wird ein Schutz für die untere Endabdeckung bereitgestellt, da das wärmeisolierende Element im Installationsloch installiert ist, kann das wärmeisolierende Element nach langfristiger Verwendung dadurch ausgetauscht werden, dass der Druckdeckel abgenommen wird.

In summary, the present application has at least one of the following advantages:

1. 1. the water entering through the water inlet port is divided in the water inlet port, the divided water entering each heat exchange coil tube; when the water through the When the heat exchange coiled tube flows, the water dissipates the heat inside the housing in order to realize a heat exchange; by arranging a plurality of heat exchange coil tubes and nesting the heat exchange coil tubes one inside the other, the heat is gradually absorbed to improve the heat recovery efficiency of the flue gas of the heat exchanger,
2. 2. The housing is split to install the heat exchange coil tube inside the housing;
3. 3. When the burner is ignited, the heat insulating element and the burner face each other to prevent the heat from being transferred to the lower end cover, thus providing protection for the lower end cover as the heat insulating element is in the installation hole is installed, the heat-insulating element can be replaced after long-term use by removing the pressure cap.

Figure list

• 1 Fig. 13 shows a schematic structural view of a condensing heat exchanger in an embodiment of the present application.
• 2 Figure 12 shows an exploded view of a condensing heat exchanger in an embodiment of the present application.
• 3rd Figure 12 is a sectional view of a condensing heat exchanger in an embodiment of the present application.
• 4th FIG. 13 shows a partial enlarged view of part A according to FIG 3rd .
• 5 FIG. 13 shows a partial enlarged view of part B according to FIG 3rd .
• 6th Fig. 13 is a schematic structural view of an inner surface of an upper end cover of the condensing heat exchanger in an embodiment of the present application.
• 7th Fig. 13 is a schematic structural view of an inner surface of a lower end cover of the condensing heat exchanger in an embodiment of the present application.
• 8th Fig. 13 is a schematic structural view of a water inlet port of the condensing heat exchanger in an embodiment of the present application.
• 9 Fig. 13 is a schematic structural view of a water outlet port of the condensing heat exchanger in an embodiment of the present application.
• 10 Fig. 13 is a schematic structural view of a conversion port of the condensing heat exchanger in an embodiment of the present application.

List of reference symbols

1

casing

11

Upper end cover

111

Upper embedment groove

112

Upper clamping groove

12th

Lower end cover

121

Lower embedment groove

122

Lower clamping groove

123

Installation hole

124

Thermal insulation panel

1241

Main body section

1242

Extension section

125

Pressure cover

13th

Cylinder body

131

Condensation outlet

132

Flue gas outlet opening

2

burner

3

Firing pin

4th

Gas pipe

5

Inner ring heat exchange coil tube

6th

Outer ring heat exchange coil tube

7th

Water outlet connection

71

Outlet pipe

711

Water outlet channel

8th

Water inlet connection

81

Inlet pipe

811

Water inlet duct

9

Conversion connector

91

Shunt section

911

Shunt channel

92

Confluence section

DETAILED DESCRIPTION

In connection with 1-10 the present application is explained in more detail below.

The embodiment of the present application discloses a condensing heat exchanger.

Please refer 1 and 2 , the condensing heat exchanger comprises a hollow housing 1 , being at the top inside the case 1 a burner 2 and a firing pin 3rd are installed. On the outside of the top of the case 1 is a gas pipe 4th placed by the top of the housing 1 goes and then connected to the burner. The gas pipe 4th and the case 1 are formed in one piece with one another. Through the gas pipe 4th can burn flammable gas for the burner 2 to be provided. The firing pin 3rd can ignite the burner 2 be used.

Please refer 2 and 3rd , inside the housing are an inner ring heat exchange coil tube 5 to put on the burner 2 inside and an outer ring heat exchange coil tube 6th for placing the inner ring heat exchange coil tube 5 placed inside, the inner ring heat exchange coil tube 5 and the outer ring heat exchange coil tube 6th are each wound spirally cylindrically. The burner 2 located in an inner hole through the inner ring heat exchange coil tube 5 formed spiral structure. At the top of the side wall of the housing 1 is a water outlet connection 7th arranged while at the lower end of the side wall of the housing 1 a water inlet connection 8th is arranged. One end of the inner ring heat exchange coil tube 5 is with the water outlet connection 7th while the other end is connected to the water inlet port 8th connected is. One end of the outer ring heat exchange coil tube 6th is with the water outlet connection 7th while the other end is connected to the water inlet port 8th connected is.

Please refer 3rd and 4th , includes the housing 1 an upper end cover 11 , a lower end cover 12th and one between the top end cap 11 and the lower end cover 12th located cylinder body 13th , the upper end and the lower end of the cylinder body 13th are each designed to be open. On one of the cylinder body 13th facing side surface of the upper end cover 11 is an upper annular embedment groove 111 provided, the upper end of the cylinder body 13th into the upper embedment groove 111 the top end cover 11 protrudes.

Please refer 3rd and 5 , is on one of the cylinder body 13th facing side surface of the lower end cover 12th a lower annular embedment groove 121 intended. The lower end of the cylinder body 12th protrudes into the lower embedment groove 121 the lower end cover 12th into it.

The top end cover 11 and the lower end cover 12th are fastened together by several bolt and nut assemblies, with the cylinder body 13th between the top end cover 11 and the lower end cover 12th is tightly pressed and fastened.

Please refer 3rd and 6th , is on the one to the inner ring heat exchange coil tube 5 and the outer ring heat exchange coil tube 6th opposite positions on an inner surface of the top end cover 11 an upper clamping groove 112 provided with the upper end of the inner ring heat exchange coil tube 5 into the opposite upper clamping groove 112 protrudes while the upper end of the outer ring heat exchange coil tube 6th into the opposite upper clamping groove 112 protrudes.

Please refer 3rd and 7th , is on the one to the inner ring heat exchange coil tube 5 and the outer ring heat exchange coil tube 6th opposite positions on an inner surface of the lower end cover 12th a lower clamping slot 122 provided with the lower end of the inner ring heat exchange coil tube 5 into the opposite lower clamping groove 122 protrudes while the lower end of the outer ring heat exchange coil tube 6th into the opposite lower clamping groove 122 protrudes.

Please refer 6th , is the burner 2 , the firing pin 3rd who have favourited the gas pipe 4th and the water outlet connection 7th each on the top end cover 11 . The water inlet connection 8th located on the lower end cover 12th .

Please refer 2 , are on the side wall of the cylinder body 13th one with the inner hole of the cylinder body 13th connected condensate outlet 131 and flue gas outlet 132 provided, the condensate outlet opening 131 and flue gas outlet 132 each with the cylinder body 13th are firmly connected or formed in one piece.

At a position on the lower end cover opposite the burner 12th is an installation hole 123 provided, being inside the installation hole 123 a thermal insulation panel 124 made of refractory material is installed. The thermal insulation panel 124 includes one inside the installation hole 123 embedded Main body section 1241 and one on the outer surface of the lower end cover 12th adjacent extension section 1242 , the main body portion 1241 and the extension portion 1242 are integrally formed with each other. On the outer surface of the lower end cover 12th is a pressure lid 125 arranged, the the extension portion 1242 tightly pressed so that the extension portion 1242 on the outer surface of the lower end cover 12th is applied. The pressure lid 125 is by a bolt to the bottom end cover 12th attached.

Please refer 8th , includes the water outlet connection 7th an outlet pipe 71 , the one with the top end cover 11 is integrally formed and extends to the outside of the top end cover 11 extends, being inside the outlet tube 71 two parallel water outlet channels 711 are arranged, and wherein the inner ring heat exchange coil tube 5 with a water outlet channel 711 is connected while the outer ring heat exchange coil tube 6th with the other water outlet channel 711 connected is. The inner ring heat exchange coil tube 5 is with the outlet pipe 71 attached in a sealing manner. The outer ring heat exchange coil tube 6th is with the outlet pipe 71 attached in a sealing manner.

Please refer 9 , includes the water inlet connector 8th an inlet pipe 81 , the one with the bottom end cover 12th is integrally formed and extends to the outside of the lower end cover 12th extends, being inside the inlet tube 81 two parallel water outlet channels 711 are arranged, and wherein the inner ring heat exchange coil tube 5 with a water inlet channel 811 is connected while the outer ring heat exchange coil tube 6th with the other water inlet channel 811 connected is. The inner ring heat exchange coil tube 5 is with the inlet pipe 81 sealingly attached while the outer ring heat exchange coil tube 6th with the inlet pipe 81 is sealingly attached.

Please refer 1 and 10 , is on one of the top end cover 11 remote end of the water outlet connection 7th and one of the lower end cover 12th remote end of the water inlet connection 8th one conversion connection each 9 detachably connected. The conversion connector 9 comprises a shunt section arranged one after the other 91 and confluence section 92 which are integrally formed with one another. The confluence section 92 adopts a structure of the round pipe, both ends of which are formed open. Inside the shunt section 91 are two shunt channels 911 arranged, with one end of the two bypass channels 911 with the inner hole of the confluence section 92 is connected, while the other end of the bypass channels 911 with the end face of one of the confluence section 92 remote end of the shunt section 91 connected is.

Please refer 8th and 10 when the conversion port 9 at the water outlet connection 7th is installed, becomes a part of the confluence section 92 remote end of the shunt section 91 with the water outlet connection 7th coupled and the two are fastened together by a bolt. From the two shunt channels 911 inside the shunt section 91 is a shunt channel 911 opposite to a water outlet channel 711 and is connected to it while the other shunt channel 911 opposite to the other water outlet channel 711 lies and is connected to it.

Please refer 9 and 10 when the conversion port 9 at the water inlet connection 8th is installed, becomes a section of the confluence 92 remote end of the shunt section 91 with the water inlet connection 8th coupled and the two are fastened together by a bolt. From the two shunt channels 911 inside the shunt section 91 is a shunt channel 911 opposite to a water inlet channel 811 and is connected to it while the other shunt channel 911 opposite to the other water inlet channel 811 lies and is connected to it.

The implementation principle of a condensing heat exchanger in one embodiment of the present application is as follows: that through the water inlet port 8th Any water that has entered is first divided inside the water inlet connection so that the water enters the inner ring heat exchange coil tube 6th and outer ring heat exchange coil tube 6th is fed. When the water passes through the inside of the inner ring heat exchange coil tube 5 and the outer ring heat exchange coil tube 6th flows, the heat can be dissipated inside the housing in order to realize a heat exchange. Through a two-layer heat exchange of the inner ring heat exchange coil tube 5 and the outer ring heat exchange coil tube 6th the heat exchange efficiency can be increased.

Above is a preferred embodiment of the present application, the scope of the present application is not limited thereto, therefore, all equivalent changes made on the basis of the structure, form and principle of the present application are intended to be excluded from the scope of the present application be considered covered.

Claims (9)

Condensing heat exchanger which is used for a burner (2), the condensing heat exchanger comprising a housing (1) and a heat exchange structure received in the housing 81), characterized in that the heat exchange structure comprises at least two heat exchange coiled tubes which form a spiral cylindrical structure are wound, wherein one heat exchange coil tube of the at least two heat exchange coil tubes forms a first cylinder body, while the other heat exchange coil tube forms a second cylinder body, and wherein the burner (2) is arranged inside the first cylinder body, and wherein the second cylinder body on the outside of the first cylinder body is placed, and wherein a water inlet connection (8) and a water outlet connection (7) are arranged on the housing (1), and wherein one end of the heat exchange coil tube is connected to the water inlet connection (8), while the other En de of the heat exchange coil is connected to the water outlet connection (7). Condensing heat exchanger after Claim 1 , characterized in that the housing (1) comprises an upper end cover (11), a lower end cover (12) and a cylinder body (13) located between the upper end cover (11) and the lower end cover (12), the upper end and the lower end of the cylinder body (13) are each open, and wherein the cylinder body (13) is tightly pressed and fixed between the upper end cover (11) and the lower end cover (12), and the upper end cover (11) and the lower end cover (12) are detachably connected to one another by a connecting element. Condensing heat exchanger after Claim 2 , characterized in that an upper annular embedding groove (111) is provided on a side surface of the upper end cover (11) facing the cylinder body (13), while a lower annular embedding groove is provided on a side surface of the lower end cover (12) facing the cylinder body (13) (121) is provided, the upper end of the cylinder body (13) protruding into the upper embedding groove (111), while the lower end of the cylinder body (13) protrudes into the lower embedding groove (121). Condensing heat exchanger after Claim 2 , characterized in that at the positions opposite to the heat exchange coiled tubes on a side surface of the upper end cover (11) facing the cylinder body (13) and a side surface of the lower end cover (12) facing the cylinder body (13) each a clamping groove is provided, whereby the upper end of the heat exchange coil tube is in the clamping groove of the upper end cover (11), while the lower end of the heat exchange coil tube is in the clamping groove of the lower end cover (12). Condensing heat exchanger after Claim 2 , characterized in that at a position of the lower end cover (12) opposite to the burner (2) there is provided an installation hole (123) on which a heat insulating member made of refractory material is arranged, wherein on an outer surface of the lower end cover (12) a pressure lid (125) is disposed which tightly presses and fixes the heat insulating member between the pressure lid (125) and the lower end cover (12), and the pressure lid (125) is detachably connected to the lower end cover (12) by a connector . Condensing heat exchanger after Claim 1 , characterized in that a conversion connection (9) is arranged at one end of the water inlet connection (8) and the water outlet connection (7) facing away from the housing (1), one end of the water inlet connection (8) or the water outlet connection (7) facing away from the Conversion connector (9) is formed as a structure of the round tube. Condensing heat exchanger after Claim 6 , characterized in that the conversion connection (9) is detachably connected to the water inlet connection (8) and the water outlet connection (7). Condensing heat exchanger after Claim 6 , characterized in that the conversion connection (9) comprises a shunt section (91) and a confluence section (92), wherein the confluence section (92) assumes a round pipe structure, both ends of which are formed open, and wherein inside the shunt section (91) Shunt channels (911) are arranged in the same number as the heat exchange coil tubes, and wherein the shunt channels (911) are connected to the inner hole of the confluence section (92), and wherein the shunt channels (911) inside the shunt section (91) are one-to-one - Form a correspondence with the heat exchange coiled tubes and are connected to them. Condensing heat exchanger after Claim 1 , characterized in that in the interior of the water inlet connection (8) and the water outlet connection (7) in each case channels are arranged, the number of which adapts to the heat exchange coil tubes.

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