CN212567005U - Heat exchanger - Google Patents

Abstract

The utility model discloses a heat exchange device, which comprises a hollow outer shell, a main heat exchange tube layer, a condensation heat exchange tube layer and a first baffle plate, wherein the main heat exchange tube layer, the condensation heat exchange tube layer and the first baffle plate are arranged in the outer shell and are all arranged in a hollow manner; the wall body of the main heat exchange tube layer is internally provided with a first fluid channel, the wall body of the main heat exchange tube layer is provided with a first gas channel communicated with the inner side and the outer side, and the first gas channel is distributed among the first fluid channels; the condensation heat exchange tube layer is sleeved at the periphery of the main heat exchange tube layer at intervals, and a second fluid channel communicated with the first fluid channel is arranged in the wall body of the condensation heat exchange tube layer; first baffle, it is located between main heat transfer tube layer and the condensation heat transfer tube layer, is provided with the first flue gas through-hole of a plurality of intercommunication inside and outside on the first baffle, and the first flue gas through-hole of a plurality of is relative with first fluid passage and arranges along first fluid passage's trend, the utility model discloses can make flue gas temperature distribution more even, the heat exchange is more abundant to reduce thermal waste, greatly improved heat exchange efficiency.

Description

Heat exchanger

Technical Field

The utility model relates to a heat exchange equipment especially relates to a heat transfer device.

Background

In the prior art, most of heat exchangers adopt finned tube heat exchangers, a combustion chamber part adopts a water tube disc shell, and as the contact surface of the water tube and the shell is less, the available heat of the water tube is less, and most of the heat is transferred to the surface of the shell, the surface temperature of the shell is high, a large amount of heat waste is caused, and the heat conversion efficiency is lower. Some condensers add a condensing heat exchanger behind the main heat exchanger to improve the heat exchange stroke, but the sealing requirement between the main heat exchanger and the condensing heat exchanger is high, and the total efficiency is difficult to improve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a heat transfer device to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

The technical scheme adopted for solving the technical problems is as follows:

a heat exchange device comprises a hollow outer shell, a main heat exchange tube layer, a condensation heat exchange tube layer and a first baffle, wherein the main heat exchange tube layer, the condensation heat exchange tube layer and the first baffle are arranged in the outer shell and are all arranged in a hollow mode; the wall body of the main heat exchange tube layer is internally provided with a first fluid channel, the wall body of the main heat exchange tube layer is provided with a first gas channel communicated with the inner side and the outer side, and the first gas channel is distributed among the first fluid channels; the condensation heat exchange tube layer is sleeved at the periphery of the main heat exchange tube layer at intervals, and a second fluid channel communicated with the first fluid channel is arranged in a wall body of the condensation heat exchange tube layer; the first baffle is positioned between the main heat exchange tube layer and the condensation heat exchange tube layer, a plurality of first flue gas through holes communicated with the inner side and the outer side are formed in the first baffle, and the plurality of first flue gas through holes are opposite to the first fluid channel and are distributed along the trend of the first fluid channel.

The technical scheme at least has the following beneficial effects: the main heat exchange tube layer is provided with a first fluid channel through which a fluid to be heated can pass, the wall body of the main heat exchange tube layer is provided with a first gas channel through which smoke can pass from the inside to the outside of the first fluid channel, the condensation heat exchange tube layer is provided with a second fluid channel through which the fluid to be heated can pass, high-temperature smoke is introduced into the hollow main heat exchange tube layer and diffuses in the direction from the main heat exchange tube layer to the condensation heat exchange tube layer, the smoke firstly passes through the outer wall of the main heat exchange tube layer and is gathered to the position near the first smoke through hole of the first baffle plate from the first gas channel and then flows to the condensation heat exchange tube layer through the first smoke through hole, in the process, the smoke is blocked by the first baffle plate after passing through the main heat exchange tube layer, the flow rate of the smoke is reduced, the heat exchange time of the smoke and the heat exchange tubes is prolonged, and when the smoke is gathered to the position near the first, when the uniformly mixed flue gas is discharged from the first flue gas through hole, the flue gas is diffused outwards to the condensation heat exchange tube layer, the temperature distribution of the flue gas is more uniform in the whole process, and the heat exchange is more sufficient; the first flue gas through hole is opposite to the first fluid channel, so that flue gas can be fully contacted with the outer side surface of the main heat exchange tube layer in the process of flowing to the first flue gas through hole, and the main heat exchange tube layer can fully absorb heat; the liquid that needs the heat transfer lets in the second fluid passage earlier in, preheats, and the reentrant first fluid passage heats, can carry out make full use of to the heat of flue gas for the heat exchange is more abundant, reduces thermal waste, has greatly improved heat exchange efficiency.

As a further improvement of the above technical scheme, the central axis of the first flue gas through hole intersects with the central line of the first fluid channel. After the flue gas flows through main heat exchange tube layer, because first baffle blocks the flue gas, the flue gas can only flow from just flowing to first fluid passage's first flue gas through-hole, and the flue gas can flow round the outer wall on main heat exchange tube layer again before getting into first flue gas through-hole, has prolonged the heat transfer time and the heat transfer stroke on flue gas and main heat exchange tube layer for heat exchange is more abundant.

As a further improvement of the technical scheme, a flue gas outlet is formed in one side wall of the outer shell, which is opposite to the wall body of the main heat exchange tube layer, and a condensed water outlet which is opposite to the flue gas outlet is formed in the outer shell; the aperture of the first flue gas through hole is gradually reduced along the direction from the condensed water outlet to the flue gas outlet. In structural design, the flue gas can be discharged after fully exchanging heat in the using process, the flue gas is mainly accumulated at a condensed water outlet and then rises to a flue gas outlet to be discharged, and therefore heat loss is less, and the heat-transfer heat-exchange heat-.

As a further improvement of the technical proposal, the utility model also comprises a hollow second baffle; a wall body of the condensation heat exchange tube layer is provided with second gas channels communicated with the inner side and the outer side, and the second gas channels are distributed among the second fluid channels; the second baffle is sleeved on the periphery of the condensation heat exchange tube layer at intervals, a plurality of second smoke through holes communicated with the inner side and the outer side are formed in the second baffle, and the second smoke through holes are opposite to the second fluid channel and are distributed along the direction of the second fluid channel. After the flue gas flows through the condensation heat exchange tube layer, because the second baffle blocks the flue gas, the flue gas can only flow from just flowing to the second flue gas through hole on condensation heat exchange tube layer, and the flue gas can flow around the outer wall on condensation heat exchange tube layer again before getting into the second flue gas through hole, has prolonged the heat transfer time and the heat transfer stroke of flue gas and second heat exchange tube for heat exchange is more abundant.

As a further improvement of the technical scheme, the central axis of the second flue gas through hole is intersected with the central line of the second fluid channel. After the flue gas flows through the condensation heat exchange tube layer, because the second baffle blocks the flue gas, the flue gas can only flow out from the second flue gas through hole just to second fluid passage, and the flue gas can flow around the outer wall on condensation heat exchange tube layer again before getting into the second flue gas through hole, has prolonged the heat transfer time and the heat transfer stroke on flue gas and condensation heat exchange tube layer for heat exchange is more abundant.

As a further improvement of the technical scheme, a flue gas outlet is formed in one side wall of the outer shell, which is opposite to the wall body of the main heat exchange tube layer, and a condensed water outlet which is opposite to the flue gas outlet is formed in the outer shell; and the aperture of the second flue gas through hole is gradually reduced along the direction from the condensed water outlet to the flue gas outlet. Similarly, in the structural design, the flue gas can be discharged after fully exchanging heat in the using process, and the flue gas is mainly accumulated at the condensed water outlet and then rises to the flue gas outlet to be discharged, so that the heat loss is less, and the heat-exchange type heat-exchange device has the characteristics of high heat-transfer efficiency, compact and light structure, safety and reliability.

As a further improvement of the above technical solution, the main heat exchange tube layer is mainly composed of a first heat exchange tube, the first heat exchange tube is arranged to spirally extend with a gap, and the gap formed by the first heat exchange tube constitutes the first gas channel; the condensation heat exchange tube layer is mainly composed of second heat exchange tubes, the second heat exchange tubes are arranged to spirally extend with gaps, and the gaps formed by the second heat exchange tubes form the second gas channels. A first fluid channel is formed in the first heat exchange tube, a second fluid channel is formed in the second heat exchange tube, the flue gas firstly passes through the first flue gas through hole after passing through the first heat exchange tube in an encircling mode, and then passes through the second flue gas through hole after passing through the second heat exchange tube in an encircling mode, so that the heat exchange between the flue gas and the heat exchange tubes is more sufficient in the process, and the heat exchange efficiency is greatly improved.

As a further improvement of the technical proposal, the utility model also comprises an end cover plate; the outer shell is provided with a mounting opening; the end cover plate is positioned at the mounting port of the outer shell, the inner side of the wall body opposite to the mounting port on the outer shell is fixedly connected with a first limiting plate, the inner side surface of the end cover plate is provided with a second limiting plate, and two ends of the first baffle plate are respectively sleeved on the outer side of the first limiting plate and the outer side of the second limiting plate; the wall body inboard relative with the installing port on the shell body is provided with first draw-in groove, the medial surface of end cover board is provided with the second draw-in groove, the both ends of second baffle insert respectively first draw-in groove with in the second draw-in groove.

As a further improvement of the above technical scheme, a first compression structure is arranged on the inner side of the wall body opposite to the mounting port on the shell body, a second compression structure is arranged on the inner side surface of the end cover plate, the main heat exchange tube layer and the condensation heat exchange tube layer are located between the first compression structure and the second compression structure, and the main heat exchange tube layer and the condensation heat exchange tube layer are compressed by the first compression structure and the second compression structure. Can be to main heat exchange tube layer, condensation heat exchange tube layer spacing fixed in the heat transfer cavity through first compact structure and second compact structure, consequently, have two heat exchange tubes that can carry out the heat transfer in the shell body to the position and the interval of two heat exchange tubes can effectively be fixed, thereby the flue gas in proper order with two heat exchange tube heat exchanges, make full use of flue gas heat, it is little apart from nearly heat dissipation between two heat exchange tubes, have heat transfer efficiency height, compact structure is light and handy, safe and reliable's characteristics.

As a further improvement of the above technical solution, the first compressing structure includes first fixing columns disposed on the outer shell, the number of the first fixing columns is not less than three, the second compressing structure includes second fixing columns disposed on the inner side surface 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 respectively abut against the main heat exchange tube layer. First fixed column stretches out the shell body, has three first fixed column at least, a side end face of three first fixed column forms one jointly and compresses tightly the face, equally, the opposite side end face of at least three second fixed column forms one and compresses tightly the face, two compress tightly the face and can compress tightly and spacing with main heat exchange tube layer, make main heat exchange tube layer effective fixed in the heat transfer cavity, and utilize columnar structure's fixed column and main heat exchange tube layer to offset, reduce the heat conduction area of main heat exchange tube layer to the shell body, but the heat loss can be reduced.

As a further improvement of the above technical solution, the first pressing structure further includes a first arc-shaped supporting plate disposed on the outer shell, the second pressing structure further includes a second arc-shaped supporting plate disposed on the inner side surface of the end cover plate and opposite to the first arc-shaped supporting plate, and the first arc-shaped supporting plate and the second arc-shaped supporting plate are respectively abutted to the condensation heat exchange tube layer. The arc structural design of first arc backup pad and second arc backup pad can be laminated mutually with the direction of spiral on condensation heat transfer tube layer better, thereby support to condensation heat transfer tube layer better and compress tightly, so utilize first arc backup pad, the second arc backup pad compresses tightly the both ends on condensation heat transfer tube layer, make condensation heat transfer tube layer effectively fixed in the heat transfer cavity, and utilize platelike structure's side and condensation heat transfer tube layer to offset, reduce the heat conduction area of main heat transfer tube layer to the shell body, can reduce the heat loss.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of the internal structure of the heat exchange tube set of the present invention;

FIG. 2 is a schematic view of the internal structure of the heat exchange tube set of the present invention after being installed in the outer shell;

FIG. 3 is a perspective view of the heat exchanger of the present invention;

FIG. 4 is a schematic view of the inner structure of the outer shell and the end cover plate of the present invention after they are assembled;

fig. 5 is a perspective view of the outer casing of the present invention;

fig. 6 is a perspective view of the end cover plate of the present invention.

In the drawings: 100-main heat exchange tube layer, 200-condensation heat exchange tube layer, 300-first baffle, 310-first flue gas through hole, 400-second baffle, 410-second flue gas through hole, 500-outer shell, 510-mounting port, 520-flue gas outlet, 530-condensate 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 clamping groove and 920-second clamping groove.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 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 which are arranged in the outer shell 500 and are all arranged in a hollow manner, wherein a first fluid channel is arranged in a wall body of the main heat exchange tube layer 100, a first gas channel communicated with the inside and the outside is arranged on the wall body, and the first gas channel is distributed between the first fluid channels; the condensation heat exchange tube layer 200 is sleeved at the periphery of the main heat exchange tube layer 100 at intervals, and a second fluid channel communicated with the first fluid channel is arranged in the wall body of the condensation heat exchange tube layer; the first baffle 300 is located between the main heat exchange tube layer 100 and the condensation heat exchange tube layer 200, the first baffle 300 is provided with a plurality of first flue gas through holes 310 communicating the inner side and the outer side, the plurality of first flue gas through holes 310 are opposite to the first fluid channel and are arranged along the direction of the first fluid channel, namely, the projections of the first flue gas through holes 310 on the first fluid channel along the central line of the first flue gas through holes all fall on the first fluid channel. The main heat exchange tube layer 100 has a first fluid channel for passing a fluid to be heated, and a wall body of the main heat exchange tube layer 100 has a first gas channel for passing a flue gas from the first fluid channel from inside to outside, similarly, the condensation heat exchange tube layer 200 has a second fluid channel for passing a fluid to be heated, a high temperature flue gas is introduced into the hollow main heat exchange tube layer 100 and diffuses in a direction from the main heat exchange tube layer 100 to the condensation heat exchange tube layer 200, the flue gas firstly passes through the outer wall of the main heat exchange tube layer 100, converges from the first gas channel to a position near a first flue gas through hole 310 of the first baffle 300, and then flows to the condensation 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, the flow rate of the flue gas is reduced, the heat exchange time of the flue gas and the heat exchange tubes is prolonged, and when the flue, the flue gas temperature after heat exchange can be uniformly mixed, when the uniformly mixed flue gas is discharged from the first flue gas through hole 310, the flue gas is diffused to the condensation heat exchange tube layer 200, the flue gas temperature distribution in the whole process is more uniform, and the heat exchange is more sufficient; because first flue gas through-hole 310 with first fluid passage is relative, the flue gas can fully contact with the lateral surface on main heat transfer pipe layer at the in-process that flows to first flue gas through-hole promptly for main heat transfer pipe layer can fully absorb the heat, and the liquid that needs the heat transfer lets in the second fluid passage, preheats earlier, and the first fluid passage of reentrant heats, can carry out make full use of to the heat of flue gas, makes the heat exchange more abundant, reduces thermal waste, has greatly improved heat exchange efficiency.

For a further optimized design of the first flue gas through hole 310, the central axis of the first flue gas through hole 310 intersects the centre line of the first fluid channel. When the first smoke through holes 310 are in a regular symmetrical structure, the central line is the central axis. After the flue gas flows through main heat exchange tube layer 100, because first baffle 300 blocks the flue gas, the flue gas can only flow out from just to first fluid passage's first flue gas through-hole 310, and the flue gas can flow around the outer wall on main heat exchange tube layer 100 again before getting into first flue gas through-hole 310, has prolonged the heat transfer time and the heat transfer stroke on flue gas and main heat exchange tube layer 100 for heat exchange is more abundant.

In order to further improve the heat exchange time and the heat exchange effect of the flue gas flowing through the main heat exchange tube layer 100, a flue gas outlet 520 is formed in one side wall of the outer shell 500, which is opposite to the wall body of the main heat exchange tube layer 100, and a condensed water outlet 530 is formed in the outer shell 500, which is opposite to the flue gas outlet 520; the aperture of the first flue gas through hole 310 gradually decreases in the direction from the condensed water outlet 530 to the flue gas outlet 520. In structural design, the flue gas can be fully contacted with the periphery of the main heat exchange tube layer 100 in the using process, the flue gas is discharged after heat exchange, the flue gas is mainly accumulated at the condensed water outlet 530 and then rises to the flue gas outlet 520 to be discharged, and therefore heat loss is less, and the heat-exchange tube has the characteristics of high heat-transfer efficiency, compact and light structure, safety and reliability.

In order to further improve the heat exchange time and the heat exchange effect of the flue gas flowing through the condensation heat exchange tube layer 200, the utility model also comprises a hollow second baffle 400; a wall body of the condensation heat exchange tube layer 200 is provided with second gas channels communicated with the inner side and the outer side, and the second gas channels are distributed among the second fluid channels; the second baffle 400 is sleeved on the periphery of the condensing heat exchange tube layer 200 at intervals, a plurality of second flue gas through holes 410 communicated with the inner side and the outer side are arranged on the second baffle 400, the plurality of second flue gas through holes 410 are opposite to the second fluid channel and are arranged along the trend of the second fluid channel, namely, the projections of the second flue gas through holes 410 on the second gas channel along the central axial direction thereof all fall on the second gas channel. After the flue gas flows through condensation heat exchange tube layer 200, because second baffle 400 blocks the flue gas, the flue gas can only flow out from just to condensation heat exchange tube layer 200's second flue gas through-hole 410, and the flue gas can flow around the outer wall on condensation heat exchange tube layer 200 again before getting into second flue gas through-hole 410, has prolonged the heat transfer time and the heat transfer stroke of flue gas and second heat exchange tube for heat exchange is more abundant.

For a further optimized design of the second flue gas through hole 410, the centre line of the second flue gas through hole 410 intersects the centre line of the second fluid channel. When the second flue gas passing holes 410 are in a regular symmetrical structure, the central line is the central axis. After the flue gas flows through the condensation heat exchange tube layer 200, because the second baffle 400 blocks the flue gas, the flue gas can only flow out from the second flue gas through hole 410 just to the second fluid passage, and the flue gas can flow around the outer wall of the condensation heat exchange tube layer 200 before entering the second flue gas through hole 410, so that the heat exchange time and the heat exchange stroke of the flue gas and the condensation heat exchange tube layer 200 are prolonged, and the heat exchange is more sufficient.

In order to further improve the heat exchange time and the heat exchange effect of the flue gas flowing through the condensing heat exchange tube layer 200, the aperture of the second flue gas through hole 410 is gradually reduced along the direction from the condensed water outlet 530 to the flue gas outlet 520. Similarly, in the structural design, the flue gas can be fully contacted with the periphery of the main heat exchange tube layer 100 in the using process, the flue gas is discharged after heat exchange, the flue gas is mainly accumulated at the condensed water outlet 530 and then rises to the flue gas outlet 520 to be discharged, and therefore the heat loss is less, and the heat-transfer heat-exchange tube has the characteristics of high heat-transfer efficiency, compact and light structure, safety and reliability.

As for the structures of the first baffle 300, the second baffle 400, both of which are tubular as shown from the given drawings; from an implementation perspective, the first baffle 300 and the second baffle 400 may be tubular structures with one end closed. Of course, other structures that do not affect the design point and effect of the present invention may also be employed.

Regarding the structure of the main heat exchange tube layer 100 and the condensation heat exchange tube layer 200, the main heat exchange tube layer 100 is mainly composed of a first heat exchange tube, the first heat exchange tube is arranged to spirally extend with a gap, and the gap formed by the first heat exchange tube forms a first gas channel; the condensation heat exchange tube layer 200 is mainly composed of second heat exchange tubes arranged to spirally extend with a gap, and the gap formed by the second heat exchange tubes constitutes a second gas channel. A first fluid channel is formed in the first heat exchange tube, a second fluid channel is formed in the second heat exchange tube, the smoke firstly passes through the first smoke through hole 310 after passing through the first heat exchange tube in a surrounding mode, and then passes through the second smoke through hole 410 after passing through the second heat exchange tube in a surrounding mode, a gourd-shaped flow path of the smoke is formed in the process, the smoke fully wraps the peripheral walls of the first heat exchange tube and the second heat exchange tube in a surrounding mode, and the heat exchange efficiency is further improved. The structure is easy to process and produce.

Of course, the first heat exchange tube or/and the second heat exchange tube may be arranged to extend in a reciprocating bending manner with a gap. The spiral extension is a specific arrangement structure of the reciprocating bending extension. The heat exchange tube can be bent and extended in other ways to form a hollow structure with a gas channel.

In practical application, the two ends of the first heat exchange tube and the two ends of the second heat exchange tube can extend out from the same direction, so that the structure is simple and the sealing is easy. A plurality of fins are uniformly arranged on the outer side wall of the first heat exchange tube along the length extension direction of the main heat exchange tube; and/or the second heat exchange tube is a corrugated tube. The fin multiplicable area of contact with the flue gas, better with the heat transfer of flue gas to first heat exchange tube, strengthen the heat transfer effect of flue gas and first heat exchange tube, and first heat exchange tube can increase the clearance between the spiral stack structurally, and possess bigger heat transfer area, guarantee flue gas is escaped usually, promote the heat exchange rate, and the second heat exchange tube is the bellows, the bellows is as condensation heat exchanger, the surface produces the comdenstion water more easily, condensation efficiency is higher, and the cost is saved, good heat transfer nature and easy processing have again, easy assembly nature. The second heat exchange tube can be formed by a spiral coil of a spiral finned tube, in addition, the second heat exchange tube can also be formed by connecting two or more groups of corrugated tubes in parallel with the spiral coil, and the two or more groups of corrugated tubes in parallel can reduce water resistance, increase water flow and shorten heating time. The outer side wall of the first heat exchange tube is provided with fins or the second heat exchange tube is a corrugated tube, and the outer side wall of the first heat exchange tube can be provided with the fins, and the second heat exchange tube is a corrugated tube.

As shown in fig. 4 to 6, the present invention further includes an end cover plate 600; the outer shell 500 is provided with a mounting port 510; the end cover plate 600 is located at the mounting port 510 of the outer shell 500, the inner side of the wall body opposite to the mounting port 510 on the outer shell 500 is fixedly connected with a first limiting plate 810, the inner side of the end cover plate 600 is provided with a second limiting plate 820, 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, the first baffle plate 300 is fixed by respectively embedding the first limiting plate 810 and the second limiting plate 820 at two ends of the first baffle plate 300 and abutting against the inner side of the first baffle plate 300; in the illustrated embodiment, the four first limiting plates 810 and the four second limiting plates 820 are all arranged in a circular array, and the number of the first limiting plates 810 and the second limiting plates 820 is not limited to four; a first engaging groove 910 is disposed on an inner side of a wall body of the outer casing 500 opposite to the mounting opening 510, a second engaging groove is disposed on an inner side of the end cover 600, and two ends of the second baffle 400 are respectively inserted into the first engaging groove 910 and the second engaging groove 920. In order to reduce heat loss and control the stability of the components, the first locking groove 910 and the second locking groove 920 are both circular.

From the perspective of mounting the burner, the cover plate 600 is also provided with a through hole. The burner penetrates through the through hole into the outer shell and is located in the main heat exchange tube layer 100. One way of securing the burner is to the cover plate 600.

In order to enable the heat exchange tube layer to be installed more stably in the heat exchange cavity, a first compression structure is arranged on the inner side of a wall body opposite to the installation opening 510 on the outer shell 500, a second compression structure is arranged on the inner side of the wall body opposite to the first compression structure on the end cover plate 600, the main heat exchange tube layer 100 and the condensation heat exchange tube layer 200 are located between the first compression structure and the second compression structure, and the main heat exchange tube layer 100 and the condensation heat exchange tube layer 200 are compressed by the first compression structure and the second compression structure. Can be to main heat exchange tube layer 100 through first compact structure and second compact structure, condensation heat exchange tube layer 200 is spacing fixed in the heat transfer cavity, consequently, two heat exchange tubes that can carry out the heat transfer have in the shell body 500, and the position and the interval of two heat exchange tubes can effectively be fixed, thereby the flue gas in proper order with two heat exchange tube heat exchanges, make full use of flue gas heat, it is little apart from nearly heat dissipation between two heat exchange tubes, have heat transfer efficiency height, compact structure is light and handy, safe and reliable's characteristics.

First compact structure presss from both sides tightly the heat transfer subassembly with second compact structure primary action, its structural style has a plurality ofly, nevertheless because still need consider the heat of exporting outward from compact structure department, in this embodiment, first compact structure is including setting up the inboard first fixed column 710 of the wall body relative with installing port 510 on shell body 500, the quantity of first fixed column 710 is no less than three, second compact structure is including setting up the inboard second fixed column 730 of the wall body relative with first fixed column 710 on end cover 600, the quantity of second fixed column 730 is no less than three, all first fixed column 710, all second fixed column 730 offset with main heat transfer pipe layer 100 respectively. First fixed column 710 stretches out outer casing 500, there are three first fixed columns 710 at least, a side end face of three first fixed column 710 forms one jointly and compresses tightly the face, equally, another side end face of at least three second fixed column 730 forms one and compresses tightly the face, two compress tightly the face and can compress tightly main heat exchange tube layer 100 and spacing, make main heat exchange tube layer 100 effectively fixed in the heat transfer cavity, and utilize columnar structure's fixed column and main heat exchange tube layer 100 to offset, reduce the heat conduction area of main heat exchange tube layer 100 outside casing 500, can reduce the heat loss.

As a further embodiment of the first and second compressing structures, the main application here is also to compress the heat exchange assembly structure having an inner layer and an outer layer, the first compressing structure further includes a first arc support plate 720 disposed on the outer shell 500 and on the inner side of the wall body opposite to the mounting opening 510, the second compressing structure further includes a second arc support plate 740 disposed on the end cover plate 600 and on the inner side of the wall body opposite to the first arc support plate 720, and the first arc support plate 720 and the second arc support plate 740 are respectively abutted against the condensation heat exchange tube layer 200. The arc structural design of first arc backup pad 720 and second arc backup pad 740 can be better laminated with the helical direction on condensation heat transfer tube layer 200 mutually, thereby support to condensation heat transfer tube layer 200 better and compress tightly, so utilize first arc backup pad 720, second arc backup pad 740 compresses tightly the both ends on condensation heat transfer tube layer 200, make condensation heat transfer tube layer 200 effectively fixed in the heat transfer cavity, and utilize platelike structure's side and condensation heat transfer tube layer 200 to offset, reduce the heat conduction area of main heat transfer tube layer 100 outside casing 500, can reduce the heat loss.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge range of those skilled in the art.

Claims (11)

1. A heat exchange device is characterized in that: the heat exchanger comprises a hollow outer shell (500), and a main heat exchange tube layer (100), a condensation heat exchange tube layer (200) and a first baffle (300) which are arranged in the outer shell (500) and are all arranged in a hollow manner;

the wall body of the main heat exchange tube layer (100) is internally provided with a first fluid channel, the wall body of the main heat exchange tube layer is provided with a first gas channel communicated with the inner side and the outer side, and the first gas channel is distributed among the first fluid channels;

the condensation heat exchange tube layer (200) is sleeved at the periphery of the main heat exchange tube layer (100) at intervals, and a second fluid channel communicated with the first fluid channel is arranged in the wall body of the condensation heat exchange tube layer;

the first baffle (300) is located between the main heat exchange tube layer (100) and the condensation heat exchange tube layer (200), a plurality of first flue gas through holes (310) communicated with the inner side and the outer side are formed in the first baffle (300), and the first flue gas through holes (310) are opposite to the first fluid channel and are distributed along the trend of the first fluid channel.

2. A heat exchange apparatus according to claim 1, wherein: the central axis of the first flue gas through hole (310) intersects the centerline of the first fluid passage.

3. A heat exchange apparatus according to claim 1, wherein: a flue gas outlet (520) is formed in one side wall, opposite to the wall body of the main heat exchange tube layer (100), of the outer shell (500), and a condensed water outlet (530) opposite to the flue gas outlet (520) is formed in the outer shell (500); the aperture of the first flue gas through hole (310) is gradually reduced along the direction from the condensed water outlet (530) to the flue gas outlet (520).

4. A heat exchange apparatus according to claim 1, wherein: further comprising a second baffle (400) which is hollow;

a wall body of the condensation heat exchange tube layer (200) is provided with second gas channels communicated with the inner side and the outer side, and the second gas channels are distributed among the second fluid channels;

the second baffle (400) is sleeved on the periphery of the condensation heat exchange tube layer (200) at intervals, a plurality of second flue gas through holes (410) communicated with the inner side and the outer side are formed in the second baffle (400), and the plurality of second flue gas through holes (410) are opposite to the second fluid channel and are arranged along the trend of the second fluid channel.

5. A heat exchange unit according to claim 4, wherein: the central axis of the second flue gas through hole (410) intersects the centerline of the second fluid passage.

6. A heat exchange unit according to claim 4, wherein: a flue gas outlet (520) is formed in one side wall, opposite to the wall body of the main heat exchange tube layer (100), of the outer shell (500), and a condensed water outlet (530) opposite to the flue gas outlet (520) is formed in the outer shell (500); the aperture of the second flue gas through hole (410) is gradually reduced along the direction from the condensed water outlet (530) to the flue gas outlet (520).

7. A heat exchange unit according to claim 4, wherein: the main heat exchange tube layer (100) is mainly composed of first heat exchange tubes, the first heat exchange tubes are arranged to spirally extend with gaps, and the gaps formed by the first heat exchange tubes form the first gas channel; the condensation heat exchange tube layer (200) is mainly composed of second heat exchange tubes, the second heat exchange tubes are arranged to spirally extend with gaps, and the gaps formed by the second heat exchange tubes form the second gas channels.

8. A heat exchange unit according to claim 4, wherein: also includes an end cover plate (600); the outer shell (500) is provided with a mounting port (510); the end cover plate (600) is positioned 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 body opposite to the mounting port (510) on the outer shell (500), a second limiting plate (820) is arranged on the inner side of the end cover plate (600), and 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); the wall body inboard relative with installing port (510) on shell body (500) is provided with first draw-in groove (910), the medial surface of end cover board (600) is provided with second draw-in groove (920), the both ends of second baffle (400) insert respectively in first draw-in groove (910) and second draw-in groove (920).

9. A heat exchange unit according to claim 8, wherein: the wall body inboard relative with installing port (510) on shell body (500) has first compact structure, the medial surface of end cover board (600) is provided with second compact structure, main heat transfer tube layer (100), condensation heat transfer tube layer (200) are located first compact structure with between the second compact structure, first compact structure with second compact structure will main heat transfer tube layer (100), condensation heat transfer tube layer (200) compress tightly.

10. A heat exchange unit according to claim 9, wherein: the first compression structure comprises first fixing columns (710) arranged on the outer shell (500), the number of the first fixing columns (710) is not less than three, the second compression structure comprises second fixing columns (730) arranged on the inner side face of the end cover plate (600), the number of the second fixing columns (730) is not less than three, and all the first fixing columns (710) and all the second fixing columns (730) are respectively abutted to the main heat exchange tube layer (100).

11. A heat exchange unit according to claim 9, wherein: the first compression structure further comprises a first arc-shaped support plate (720) arranged on the outer shell (500), the second compression structure further comprises a second arc-shaped support plate (740) arranged on the inner side surface 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 abutted against the condensation heat exchange tube layer (200).

Images