A heat exchange device

Abstract

The present invention discloses a heat exchange device, comprising a hollow outer shell and a main heat exchange tube layer, a condensing heat exchange tube layer and a first baffle arranged in the outer shell, all of which are hollow; the main heat exchange tube layer has a first fluid channel provided in its wall, and a first gas channel connected to the inside and outside is provided on its wall, and the first gas channel is distributed between the first fluid channels; the condensing heat exchange tube layer is sleeved on the periphery of the main heat exchange tube layer at intervals, and a second fluid channel connected to the first fluid channel is provided in its wall; the first baffle is located between the main heat exchange tube layer and the condensing heat exchange tube layer, and a plurality of first flue gas through holes connected to the inside and outside are provided on the first baffle, and the plurality of first flue gas through holes are opposite to the first fluid channel and arranged along the direction of the first fluid channel. The present invention can make the flue gas temperature distribution more uniform, the heat exchange more sufficient, and reduce heat waste, thereby greatly improving the heat exchange efficiency.

Description

Technical Field

[0001] The present invention relates to a heat exchange device, in particular to a heat exchange apparatus. Background Art

[0002] In existing technology, most heat exchangers use finned tube heat exchangers, with the combustion chamber utilizing a water-tube coil shell. Due to the limited contact surface between the water tubes and the shell, the water tubes receive little heat, transferring most of the heat to the shell surface, resulting in high surface temperatures, significant heat waste, and low heat conversion efficiency. Some condensing units add a condensing heat exchanger after the main heat exchanger to increase heat transfer efficiency, but this requires strict sealing between the main and condensing heat exchangers, and overall efficiency is difficult to improve. Summary of the Invention

[0003] The purpose of the present invention is to provide a heat exchange device to solve one or more technical problems existing in the prior art and at least provide a beneficial option or create conditions.

[0004] The technical solutions adopted to solve the above technical problems are:

[0005] A heat exchange device comprises a hollow outer shell and a main heat exchange tube layer, a condensing heat exchange tube layer and a first baffle arranged in the outer shell, all of which are hollow; the main heat exchange tube layer has a first fluid channel provided in its wall, and a first gas channel connecting the inside and the outside is provided on its wall, and the first gas channel is distributed between the first fluid channels; the condensing heat exchange tube layer is sleeved on the periphery of the main heat exchange tube layer at intervals, and a second fluid channel connecting with the first fluid channel is provided in its wall; a first baffle is located between the main heat exchange tube layer and the condensing heat exchange tube layer, and a plurality of first flue gas through holes connecting the inside and the outside are provided on the first baffle, and the plurality of first flue gas through holes are opposite to the first fluid channel and arranged along the direction of the first fluid channel.

[0006] This technical solution has at least the following beneficial effects: the main heat exchange tube layer has a first fluid channel for the fluid to be heated to pass through, and on its wall there is a first gas channel for the flue gas to pass from the inside to the outside of the first fluid channel. Similarly, the condensing heat exchange tube layer has a second fluid channel for the fluid to be heated to pass through. The high-temperature flue gas enters the hollow main heat exchange tube layer and diffuses from the main heat exchange tube layer to the condensing heat exchange tube layer. The flue gas first passes through the outer wall of the main heat exchange tube layer, converges from the first gas channel to the first flue gas through hole of the first baffle, and then flows to the condensing heat exchange tube layer after passing through the first flue gas through hole. In this process, the flue gas is blocked by the first baffle after passing through the main heat exchange tube layer, which reduces the flow rate of the flue gas and prolongs the exchange time between the flue gas and the heat exchange tube. Heat time, and when the flue gas gathers near the first flue gas through-hole, the temperature of the flue gas after heat exchange can be evenly mixed. When the evenly mixed flue gas is discharged from the first flue gas through-hole, the flue gas diffuses outward to the condensing heat exchange tube layer. The flue gas temperature distribution is more uniform in the whole process, and the heat exchange is more sufficient. Since the first flue gas through-hole is opposite to the first fluid channel, the flue gas will fully contact the outer side of the main heat exchange tube layer in the process of flowing to the first flue gas through-hole, so that the main heat exchange tube layer can fully absorb heat. The liquid that needs to be heat exchanged is first passed into the second fluid channel for preheating, and then flows into the first fluid channel for heating, which can make full use of the heat of the flue gas, make the heat exchange more sufficient, reduce heat waste, and greatly improve the heat exchange efficiency.

[0007] As a further improvement to the above technical solution, the central axis of the first flue gas through-hole intersects the centerline of the first fluid channel. After the flue gas flows through the main heat exchange tube layer, the first baffle blocks the flue gas, forcing it to flow out only through the first flue gas through-hole directly opposite the first fluid channel. Before entering the first flue gas through-hole, the flue gas flows around the outer wall of the main heat exchange tube layer, extending the heat exchange time and heat exchange distance between the flue gas and the main heat exchange tube layer, and ensuring more efficient heat exchange.

[0008] As a further improvement to the above technical solution, a flue gas outlet is provided on a side wall of the outer shell opposite the main heat exchange tube layer wall, and a condensate outlet is provided on the outer shell opposite the flue gas outlet. The aperture of the first flue gas through-hole gradually decreases in the direction from the condensate outlet to the flue gas outlet. The structural design allows the flue gas to fully exchange heat before being discharged during use. The flue gas primarily accumulates at the condensate outlet and then rises to the flue gas outlet for discharge, thereby minimizing heat loss. The device features high heat transfer efficiency, a compact and lightweight structure, and safety and reliability.

[0009] As a further improvement to the above technical solution, the present invention also includes a hollow second baffle; the wall of the condensing heat exchange tube layer is provided with a second gas channel connecting the inside and outside, and the second gas channel is distributed between the second fluid channels; the second baffle is intermittently sleeved on the periphery of the condensing heat exchange tube layer, and is provided with a plurality of second flue gas holes connecting the inside and outside, and the plurality of second flue gas holes are opposite to and arranged along the direction of the second fluid channels. After the flue gas flows through the condensing heat exchange tube layer, the second baffle blocks the flue gas, and the flue gas can only flow out through the second flue gas holes directly opposite the condensing heat exchange tube layer. Before entering the second flue gas holes, the flue gas will flow around the outer wall of the condensing heat exchange tube layer, thereby extending the heat exchange time and heat exchange distance between the flue gas and the second heat exchange tube, and making the heat exchange more complete.

[0010] As a further improvement to the above technical solution, the central axis of the second flue gas through-hole intersects the centerline of the second fluid channel. After the flue gas flows through the condensing heat exchange tube layer, the second baffle blocks the flue gas, forcing it to flow out only through the second flue gas through-hole directly opposite the second fluid channel. Before entering the second flue gas through-hole, the flue gas flows around the outer wall of the condensing heat exchange tube layer, extending the heat exchange time and heat exchange distance between the flue gas and the condensing heat exchange tube layer, and ensuring more efficient heat exchange.

[0011] As a further improvement to the above technical solution, a flue gas outlet is provided on a side wall of the outer shell opposite the main heat exchange tube layer, and a condensate outlet is provided on the outer shell opposite the flue gas outlet. The aperture of the second flue gas through-hole gradually decreases from the condensate outlet to the flue gas outlet. Similarly, the structural design allows the flue gas to undergo sufficient heat exchange before being discharged during use. The flue gas primarily accumulates at the condensate outlet and then rises to the flue gas outlet for discharge, thereby minimizing heat loss. The device features high heat transfer efficiency, a compact and lightweight structure, and safety and reliability.

[0012] As a further improvement to the above technical solution, the main heat exchange tube layer is primarily composed of first heat exchange tubes, which are configured to extend spirally with gaps, and the gaps formed by the first heat exchange tubes constitute the first gas channels. The condensing heat exchange tube layer is primarily composed of second heat exchange tubes, which are configured to extend spirally with gaps, and the gaps formed by the second heat exchange tubes constitute the second gas channels. A first fluid channel is formed within the first heat exchange tube, and a second fluid channel is formed within the second heat exchange tube. The flue gas first flows around the first heat exchange tube, then passes through the first flue gas through-hole, and then flows around the second heat exchange tube and through the second flue gas through-hole. During this process, the heat exchange between the flue gas and the heat exchange tubes is more complete, greatly improving the heat exchange efficiency.

[0013] As a further improvement of the above technical solution, the present invention also includes an end cover plate; the outer shell is provided with an installation port; the end cover plate is located at the installation port of the outer shell, and a first limit plate is fixedly connected to the inner side of the wall of the outer shell opposite to the installation port, and a second limit plate is provided on the inner side of the end cover plate, and the two ends of the first baffle are respectively sleeved on the outer side of the first limit plate and the outer side of the second limit plate; a first card groove is provided on the inner side of the wall of the outer shell opposite to the installation port, and a second card groove is provided on the inner side of the end cover plate, and the two ends of the second baffle are respectively inserted into the first card groove and the second card groove.

[0014] As a further improvement to the above technical solution, the inner side of the wall of the outer shell opposite to the installation port is provided with a first pressing structure, and the inner side of the end cover is provided with a second pressing structure. The main heat exchange tube layer and the condensing heat exchange tube layer are located between the first pressing structure and the second pressing structure, and the first pressing structure and the second pressing structure press the main heat exchange tube layer and the condensing heat exchange tube layer. The first pressing structure and the second pressing structure can limit and fix the main heat exchange tube layer and the condensing heat exchange tube layer in the heat exchange cavity. Therefore, there are two heat exchange tubes for heat exchange in the outer shell, and the position and spacing of the two heat exchange tubes can be effectively fixed, so that the flue gas exchanges heat with the two heat exchange tubes in turn, fully utilizing the heat of the flue gas. The distance between the two heat exchange tubes is close, and the heat dissipation is small. It has the characteristics of high heat transfer efficiency, compact and lightweight structure, safety and reliability.

[0015] As a further improvement to the above technical solution, the first clamping structure includes a first fixing column provided on the outer shell, the number of the first fixing columns is not less than three, and the second clamping structure includes a second fixing column provided on the inner side of the end cover plate, the number of the second fixing columns is not less than three, and all of the first fixing columns and all of the second fixing columns are respectively against the main heat exchange tube layer. The first fixing column extends out of the outer shell, and there are at least three first fixing columns. The end faces of one side of the three first fixing columns jointly form a clamping surface. Similarly, the end faces of the other side of at least three second fixing columns form a clamping surface. The two clamping surfaces can compress and limit the main heat exchange tube layer, so that the main heat exchange tube layer is effectively fixed in the heat exchange cavity, and the columnar structure fixing column is used to offset the main heat exchange tube layer, thereby reducing the heat conduction area of the main heat exchange tube layer to the outer shell, thereby reducing heat loss.

[0016] As a further improvement to the above technical solution, the first clamping structure further includes a first arc-shaped support plate provided on the outer shell, and the second clamping structure further includes a second arc-shaped support plate provided on the inner side of the end cover plate and opposite to the first arc-shaped support plate, and the first arc-shaped support plate and the second arc-shaped support plate respectively abut against the condensing heat exchange tube layer. The arc-shaped structural design of the first arc-shaped support plate and the second arc-shaped support plate can better fit the spiral direction of the condensing heat exchange tube layer, thereby better supporting and pressing the condensing heat exchange tube layer. In this way, the first arc-shaped support plate and the second arc-shaped support plate are used to compress the two ends of the condensing heat exchange tube layer, so that the condensing heat exchange tube layer is effectively fixed in the heat exchange cavity, and the side of the plate-shaped structure is used to abut against the condensing heat exchange tube layer, reducing the heat conduction area of the main heat exchange tube layer to the outer shell, which can reduce heat loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 Schematic diagram of the internal structure of the heat exchange tube group of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the heat exchange tube group of the present invention after being installed in the outer shell;

[0020] Figure 3 A three-dimensional diagram of the heat exchange device of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the present invention after the outer shell and the end cover are assembled;

[0022] Figure 5 A perspective view of the outer shell of the present invention;

[0023] Figure 6 It is a three-dimensional diagram of the end cover plate of the present invention.

[0024] In the accompanying drawings: 100-main heat exchange tube layer, 200-condensing heat exchange tube layer, 300-first baffle, 310-first flue gas hole, 400-second baffle, 410-second flue gas hole, 500-outer shell, 510-installation port, 520-smoke outlet, 530-condensed water outlet, 600-end cover plate, 710-first fixed column, 720-first arc-shaped support plate, 730-second fixed column, 740-second arc-shaped support plate, 810-first limiting plate, 820-second limiting plate, 910-first slot, 920-second slot. DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Reference Figures 1 to 3, a heat exchange device includes a hollow outer shell 500 and a main heat exchange tube layer 100, a condensing heat exchange tube layer 200 and a first baffle 300 arranged in the outer shell 500, wherein a first fluid channel is provided in the wall of the main heat exchange tube layer 100, and a first gas channel connecting the inside and the outside is provided on its wall, and the first gas channel is distributed between the first fluid channels; the condensing heat exchange tube layer 200 is arranged at intervals on the outer periphery of the main heat exchange tube layer 100, and a second fluid channel connecting the first fluid channel is provided in its wall; the first baffle 300 is located between the main heat exchange tube layer 100 and the condensing heat exchange tube layer 200, and a plurality of first flue gas through holes 310 connecting the inside and the outside are provided on the first baffle 300, and the plurality of first flue gas through holes 310 are opposite to the first fluid channel and arranged along the direction of the first fluid channel, that is, the projection of the first flue gas through holes 310 along the center line of the first flue gas through hole 310 on the first fluid channel all falls on the first fluid channel. The main heat exchange tube layer 100 has a first fluid channel for the fluid to be heated to pass through, and a first gas channel is provided on its wall for the flue gas to pass from the inside to the outside of the first fluid channel. Similarly, the condensing heat exchange tube layer 200 has a second fluid channel for the fluid to be heated to pass through. The high-temperature flue gas enters the hollow main heat exchange tube layer 100 and diffuses from the main heat exchange tube layer 100 to the condensing heat exchange tube layer 200. The flue gas first passes through the outer wall of the main heat exchange tube layer 100, converges from the first gas channel to the vicinity of the first flue gas through hole 310 of the first baffle 300, and then flows to the condensing heat exchange tube layer 200 after passing through the first flue gas through hole 310. In this process, the flue gas is blocked by the first baffle 300 after passing through the main heat exchange tube layer 100, which reduces the flow rate of the flue gas and prolongs the time between the flue gas and the heat exchange tube. The heat exchange time is shortened, and when the flue gas gathers near the first flue gas through hole 310, the temperature of the flue gas after heat exchange can be evenly mixed. When the evenly mixed flue gas is discharged from the first flue gas through hole 310, the flue gas diffuses outward to the condensing heat exchange tube layer 200. The flue gas temperature distribution is more uniform during the whole process, and the heat exchange is more sufficient. Since the first flue gas through hole 310 is opposite to the first fluid channel, that is, the flue gas will fully contact the outer side of the main heat exchange tube layer in the process of flowing to the first flue gas through hole, so that the main heat exchange tube layer can fully absorb heat, and the liquid that needs to be heat exchanged is introduced into the second fluid channel, preheated first, and then flows into the first fluid channel for heating, which can fully utilize the heat of the flue gas, make the heat exchange more sufficient, reduce heat waste, and greatly improve the heat exchange efficiency.

[0030] The first flue gas through-hole 310 is further optimized so that its central axis intersects with the centerline of the first fluid channel. When the first flue gas through-hole 310 is a regularly symmetrical structure, the centerline serves as the central axis. After the flue gas flows through the main heat exchange tube layer 100, the first baffle 300 blocks the flue gas, forcing the flue gas to flow out only from the first flue gas through-hole 310 directly opposite the first fluid channel. Before entering the first flue gas through-hole 310, the flue gas flows around the outer wall of the main heat exchange tube layer 100, extending the heat exchange time and distance between the flue gas and the main heat exchange tube layer 100 and ensuring more efficient heat exchange.

[0031] To further improve the heat exchange time and heat exchange effect of the flue gas flowing through the main heat exchange tube layer 100, a flue gas outlet 520 is provided on the side wall of the outer shell 500 opposite the wall of the main heat exchange tube layer 100. A condensate outlet 530 is also provided on the outer shell 500 opposite the flue gas outlet 520. The aperture of the first flue gas through-hole 310 gradually decreases in the direction from the condensate outlet 530 to the flue gas outlet 520. The structural design allows the flue gas to fully contact the periphery of the main heat exchange tube layer 100 during use, and then be discharged after heat exchange. The flue gas mainly accumulates at the condensate outlet 530 and then rises to the flue gas outlet 520 for discharge, thereby reducing heat loss. The device has the characteristics of high heat transfer efficiency, compact and lightweight structure, and safety and reliability.

[0032] In order to further improve the heat exchange time and heat exchange effect of the flue gas flowing through the condensing heat exchange tube layer 200, the present invention also includes a hollow second baffle 400; a second gas channel connecting the inside and the outside is provided on the wall of the condensing heat exchange tube layer 200, and the second gas channel is distributed between the second fluid channels; the second baffle 400 is arranged at intervals on the periphery of the condensing heat exchange tube layer 200, and a plurality of second flue gas holes 410 connecting the inside and the outside are provided on the second baffle 400, and the plurality of second flue gas holes 410 are opposite to the second fluid channel and arranged along the direction of the second fluid channel, that is, the projection of the second flue gas hole 410 along its central axis on the second gas channel all falls on the second gas channel. After the flue gas flows through the condensing heat exchange tube layer 200, the flue gas can only flow out from the second flue gas through hole 410 opposite to the condensing heat exchange tube layer 200 due to the blocking of the flue gas by the second baffle 400. Before entering the second flue gas through hole 410, the flue gas will flow around the outer wall of the condensing heat exchange tube layer 200, thereby extending the heat exchange time and heat exchange stroke between the flue gas and the second heat exchange tube, making the heat exchange more sufficient.

[0033] The second flue gas through hole 410 is further optimized so that its centerline intersects with the centerline of the second fluid channel. When the second flue gas through hole 410 is a regularly symmetrical structure, its centerline serves as the central axis. After the flue gas flows through the condensing heat exchange tube layer 200, the second baffle 400 blocks the flue gas, so the flue gas can only flow out from the second flue gas through hole 410 directly opposite the second fluid channel. Before entering the second flue gas through hole 410, the flue gas will flow around the outer wall of the condensing heat exchange tube layer 200, extending the heat exchange time and heat exchange distance between the flue gas and the condensing heat exchange tube layer 200, making the heat exchange more complete.

[0034] To further improve the heat exchange time and efficiency of the flue gas flowing through the condensing heat exchange tube layer 200, the diameter of the second flue gas through-holes 410 gradually decreases from the condensate outlet 530 to the flue gas outlet 520. Similarly, the structural design allows the flue gas to fully contact the periphery of the main heat exchange tube layer 100 during use, exchanging heat before being discharged. The flue gas primarily accumulates at the condensate outlet 530 and then rises to the flue gas outlet 520 for discharge, thereby minimizing heat loss. This results in high heat transfer efficiency, a compact and lightweight structure, and safety and reliability.

[0035] Regarding the structure of the first baffle 300 and the second baffle 400, as shown in the figure, both are tubular. From an implementation perspective, the first baffle 300 and the second baffle 400 can be tubular structures with one end closed. Of course, other structures that do not affect the design and effects of the present invention may also be used.

[0036] Regarding the structure of the main heat exchange tube layer 100 and the condensing heat exchange tube layer 200, the main heat exchange tube layer 100 is primarily composed of a first heat exchange tube, which is configured to extend spirally with gaps. The gaps formed by the first heat exchange tubes constitute the first gas channel. The condensing heat exchange tube layer 200 is primarily composed of a second heat exchange tube, which is configured to extend spirally with gaps. The gaps formed by the second heat exchange tubes constitute the second gas channel. A first fluid channel is formed within the first heat exchange tube, while a second fluid channel is formed within the second heat exchange tube. The flue gas first flows around the first heat exchange tube, then passes through the first flue gas through-hole 310, and then around the second heat exchange tube, passing through the second flue gas through-hole 410. During this process, the flue gas flow path forms a gourd-shaped path, fully surrounding and wrapping around the outer walls of the first and second heat exchange tubes, further improving heat exchange efficiency. This structure is easy to process and produce.

[0037] Of course, the first heat exchange tube and / or the second heat exchange tube can be configured to extend in a reciprocating manner with gaps. Spiral extension is a specific configuration of reciprocating extension. As long as the heat exchange tube is reciprocatingly extended in a manner that forms a hollow structure with a gas passage, it can be used.

[0038] In practical applications, the two ends of the first heat exchange tube and the two ends of the second heat exchange tube can extend from the same direction, which can make the structure simple and easy to seal. The outer wall of the first heat exchange tube has multiple fins evenly arranged along the length extension direction of the main heat exchange tube; and / or, the second heat exchange tube is a corrugated tube. The fins can increase the contact area with the flue gas, better transfer the heat of the flue gas to the first heat exchange tube, and enhance the heat exchange effect between the flue gas and the first heat exchange tube. The first heat exchange tube can structurally increase the gap between the spiral stacking and have a larger heat exchange area, ensuring that the flue gas is normally discharged and improving the heat exchange rate. The second heat exchange tube is a corrugated tube. As a condensing heat exchanger, the corrugated tube is more likely to produce condensed water on the surface, with higher condensation efficiency, saving costs, and having good heat transfer properties and easy processing and assembly. The second heat exchange tube can also be spirally coiled with a spiral fin tube. In addition, the second heat exchange tube can also be spirally coiled with two or more groups of corrugated tubes in parallel. The two or more groups of corrugated tubes in parallel can reduce water resistance, increase water flow, and shorten heating time. Here, the outer wall of the first heat exchange tube is provided with fins or the second heat exchange tube is a corrugated tube. Alternatively, the outer wall of the first heat exchange tube is provided with fins and the second heat exchange tube is a corrugated tube.

[0039] like Figures 4 to 6 The present invention further includes an end cover plate 600; the outer shell 500 is provided with a mounting opening 510; the end cover plate 600 is located at the mounting opening 510 of the outer shell 500, and the inner side of the wall of the outer shell 500 opposite to the mounting opening 510 is fixedly connected with a first limiting plate 810, and the inner side of the end cover plate 600 is provided with a second limiting plate 820, and the two ends of the first baffle 300 are respectively sleeved on the outer side of the first limiting plate 810 and the outer side of the second limiting plate 820, and the first limiting plate 810 and the second limiting plate 820 are respectively embedded in the first baffle 300. The first baffle 300 is fixed at both ends and contacts the inner side of the first baffle 300 to fix the first baffle 300. In the illustrated embodiment, the four first limiting plates 810 and the four second limiting plates 820 are arranged in a circular pattern. Of course, the number of first limiting plates 810 and second limiting plates 820 is not limited to four. A first slot 910 is provided on the inner side of the wall of the outer shell 500 opposite the mounting opening 510, and a second slot is provided on the inner side of the end cover plate 600. The two ends of the second baffle 400 are respectively inserted into the first slot 910 and the second slot 920. To reduce heat loss and ensure the stability of the control components, the first slot 910 and the second slot 920 are both arranged in a circular shape.

[0040] From the perspective of installing the burner, a through hole is also provided on the cover plate 600. The burner passes through the through hole and goes deep into the outer shell and is located in the main heat exchange tube layer 100. One of the fixing methods of the burner is to fix it on the cover plate 600.

[0041] To ensure a more stable installation of the heat exchange tube layer within the heat exchange cavity, a first compression structure is provided on the inner side of the wall of the outer shell 500 opposite the installation opening 510, and a second compression structure is provided on the inner side of the wall of the end cover plate 600 opposite the first compression structure. The main heat exchange tube layer 100 and the condensing heat exchange tube layer 200 are located between the first compression structure and the second compression structure, and the first compression structure and the second compression structure compress the main heat exchange tube layer 100 and the condensing heat exchange tube layer 200. The first compression structure and the second compression structure can limit and fix the main heat exchange tube layer 100 and the condensing heat exchange tube layer 200 within the heat exchange cavity. Therefore, the outer shell 500 has two heat exchange tubes for heat exchange, and the position and spacing of the two heat exchange tubes can be effectively fixed, so that the flue gas exchanges heat with the two heat exchange tubes in sequence, fully utilizing the heat of the flue gas. The close distance between the two heat exchange tubes reduces heat dissipation, and the heat exchange tubes have the characteristics of high heat transfer efficiency, compact and lightweight structure, safety and reliability.

[0042] The main function of the first clamping structure and the second clamping structure is to clamp the heat exchange component, and there are various structural forms. However, since it is also necessary to consider the heat discharged outward from the clamping structure, in this embodiment, the first clamping structure includes a first fixing column 710 arranged on the inner side of the wall of the outer shell 500 opposite to the installation port 510, and the number of the first fixing columns 710 is not less than three. The second clamping structure includes a second fixing column 730 arranged on the inner side of the wall of the end cover plate 600 opposite to the first fixing column 710, and the number of the second fixing columns 730 is not less than three. All the first fixing columns 710 and all the second fixing columns 730 are respectively offset against the main heat exchange tube layer 100. The first fixing column 710 extends out of the outer shell 500, and there are at least three first fixing columns 710. The end surfaces of one side of the three first fixing columns 710 jointly form a compression surface. Similarly, the end surfaces of the other side of at least three second fixing columns 730 form a compression surface. The two compression surfaces can compress and limit the main heat exchange tube layer 100, so that the main heat exchange tube layer 100 is effectively fixed in the heat exchange cavity. In addition, the columnar structure of the fixing columns is used to offset the main heat exchange tube layer 100, thereby reducing the heat conduction area of the main heat exchange tube layer 100 to the outer shell 500, thereby reducing heat loss.

[0043] As a further embodiment of the first clamping structure and the second clamping structure, it is mainly used here to compress the heat exchange component structure with an inner and outer layer arrangement. The first clamping structure also includes a first arc-shaped support plate 720 arranged on the inner side of the wall of the outer shell 500 opposite to the installation port 510, and the second clamping structure also includes a second arc-shaped support plate 740 arranged on the inner side of the wall of the end cover plate 600 opposite to the first arc-shaped support plate 720. The first arc-shaped support plate 720 and the second arc-shaped support plate 740 are respectively against the condensing heat exchange tube layer 200. The arc-shaped structural design of the first arc-shaped support plate 720 and the second arc-shaped support plate 740 can better fit the spiral direction of the condensing heat exchange tube layer 200, thereby better supporting and pressing the condensing heat exchange tube layer 200. In this way, the first arc-shaped support plate 720 and the second arc-shaped support plate 740 are used to press the two ends of the condensing heat exchange tube layer 200, so that the condensing heat exchange tube layer 200 is effectively fixed in the heat exchange cavity, and the side of the plate-shaped structure is used to offset the condensing heat exchange tube layer 200, thereby reducing the heat conduction area of the main heat exchange tube layer 100 to the outer shell 500, thereby reducing heat loss.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the spirit of the present invention.

Claims

1. A heat exchange device, characterized in that: It comprises a hollow outer shell (500), and a main heat exchange tube layer (100), a condensing heat exchange tube layer (200), and a first baffle (300) which are arranged in the outer shell (500) and are all hollow. The main heat exchange tube layer (100) has a first fluid channel provided in its wall, and a first gas channel communicating with the inside and outside of the wall, wherein the first gas channel is distributed between the first fluid channels; a condensing heat exchange tube layer (200), which is sleeved at intervals on the periphery of the main heat exchange tube layer (100), and has a second fluid channel in communication with the first fluid channel provided in its wall; a first baffle (300) located between the main heat exchange tube layer (100) and the condensing heat exchange tube layer (200), the first baffle (300) being provided with a plurality of first flue gas through holes (310) communicating with the inside and outside, the plurality of first flue gas through holes (310) being opposite to the first fluid channel and arranged along the direction of the first fluid channel; Also includes a hollow second baffle (400); The wall of the condensing heat exchange tube layer (200) is provided with a second gas channel communicating with the inside and outside, and the second gas channel is distributed between the second fluid channels; The second baffle (400) is sleeved at intervals on the periphery of the condensing heat exchange tube layer (200), and the second baffle (400) is provided with a plurality of second flue gas through holes (410) communicating with the inside and outside, and the plurality of second flue gas through holes (410) are opposite to the second fluid channel and arranged along the direction of the second fluid channel; The invention also includes an end cover plate (600); the outer shell (500) is provided with a mounting opening (510); the end cover plate (600) is located at the mounting opening (510) of the outer shell (500); a first limiting plate (810) is fixedly connected to the inner side of the wall of the outer shell (500) opposite to the mounting opening (510); a second limiting plate (820) is provided on the inner side of the end cover plate (600); two ends of the first baffle plate (300) are respectively sleeved on the outer side of the first limiting plate (810) and the outer side of the second limiting plate (820); a first card slot (910) is provided on the inner side of the wall of the outer shell (500) opposite to the mounting opening (510); a second card slot (920) is provided on the inner side of the end cover plate (600); two ends of the second baffle plate (400) are respectively inserted into the first card slot (910) and the second card slot (920).

2. A heat exchange device according to claim 1, characterized in that: The central axis of the first smoke through hole (310) intersects with the central line of the first fluid channel.

3. The heat exchange device according to claim 1, characterized in that: A smoke outlet (520) is provided on a side wall of the outer shell (500) opposite to the wall of the main heat exchange tube layer (100), and a condensate outlet (530) opposite to the smoke outlet (520) is provided on the outer shell (500); the aperture of the first smoke through hole (310) gradually decreases along the direction from the condensate outlet (530) to the smoke outlet (520).

4. A heat exchange device according to claim 1, characterized in that: The central axis of the second smoke through hole (410) intersects with the central line of the second fluid channel.

5. The heat exchange device according to claim 1, characterized in that: A smoke outlet (520) is provided on a side wall of the outer shell (500) opposite to the wall of the main heat exchange tube layer (100), and a condensate outlet (530) opposite to the smoke outlet (520) is provided on the outer shell (500); the aperture of the second smoke through hole (410) gradually decreases along the direction from the condensate outlet (530) to the smoke outlet (520).

6. The heat exchange device according to claim 1, characterized in that: The main heat exchange tube layer (100) is mainly composed of a first heat exchange tube, which is configured to extend spirally with a gap, and the gap formed by the first heat exchange tube constitutes the first gas channel; the condensation heat exchange tube layer (200) is mainly composed of a second heat exchange tube, which is configured to extend spirally with a gap, and the gap formed by the second heat exchange tube constitutes the second gas channel.

7. The heat exchange device according to claim 1, characterized in that: The inner side of the wall of the outer shell (500) opposite to the installation port (510) is provided with a first pressing structure, and the inner side surface of the end cover plate (600) is provided with a second pressing structure. The main heat exchange tube layer (100) and the condensing heat exchange tube layer (200) are located between the first pressing structure and the second pressing structure. The first pressing structure and the second pressing structure press the main heat exchange tube layer (100) and the condensing heat exchange tube layer (200).

8. A heat exchange device according to claim 7, characterized in that: The first pressing structure includes a first fixing column (710) provided on the outer shell (500), and the number of the first fixing columns (710) is not less than three. The second pressing structure includes a second fixing column (730) provided on the inner side of the end cover plate (600), and the number of the second fixing columns (730) is not less than three. All of the first fixing columns (710) and all of the second fixing columns (730) are respectively against the main heat exchange tube layer (100).

9. The heat exchange device according to claim 7, characterized in that: The first compression structure further includes a first arc-shaped support plate (720) arranged on the outer shell (500), and the second compression structure further includes a second arc-shaped support plate (740) arranged on the inner side of the end cover plate (600) and opposite to the first arc-shaped support plate (720), and the first arc-shaped support plate (720) and the second arc-shaped support plate (740) are respectively against the condensing heat exchange tube layer (200).

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