CN214095653U

CN214095653U - Header three-sleeve water storage secondary heating heat exchanger

Info

Publication number: CN214095653U
Application number: CN202022956741.0U
Authority: CN
Inventors: 张伟; 张冲
Original assignee: Shandong Lineng Heat Exchanger Co ltd
Current assignee: Shandong Lineng Heat Exchanger Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-08-31
Anticipated expiration: 2030-12-11

Abstract

A header body three-sleeve water storage secondary heating heat exchanger comprises: at least one heating pipe is arranged in a pipe cavity of the two header bodies, wherein the plurality of cold water pipes are hermetically connected with the inner side pore plate, and the heating pipes are hermetically connected and communicated; a cold water heat absorption pipe is arranged in the cavity of at least one heating pipe; a cold water heat absorption pipe inserted into the pipe cavity of the heating pipe is fixedly connected with the cold fluid cavity of the header in a sealing way or is communicated with the pipe cavity of the cold water pipe to form a three-sleeve cold medium secondary continuous heating fast channel; the header body enclosed by the outer side plate, the inner side pore plate and the end cover plate in a sealed welding connection mode is a hot fluid cavity or a cold fluid cavity. The invention has simple process structure and high thermal efficiency, the header body is connected with the cold medium stored in the plurality of cold water pipes and enters the heating pipe channel for the second time through the three-sleeve design scheme to continuously conduct heat, the flow length is increased, the heat exchange time is prolonged, the residence time of the cold medium is longer than the flow speed of the heating heat source, and the heat exchange effect that the temperature of the heated cold medium is the same as that of the heating heat source is realized.

Description

Header three-sleeve water storage secondary heating heat exchanger

Technical Field

The invention relates to the technical field of heating ventilation, in particular to a domestic heating conversion water heater for exchanging hot water for a heat source by utilizing domestic heating, and specifically relates to a header three-sleeve water storage secondary heating heat exchanger made of stainless steel, low-carbon steel or copper-aluminum plate tubes.

Background

The domestic heating installation of market circulation at present changes water heater (generally called heat exchanger) field, and the technical characterstic of its heat exchanger generally is that the header body connects the big pipe box heating pipe water storage formula of cold water or the header body is heating installation access structure, and this structure prior art exists not enoughly: the large pipe sleeve and the small pipe are short in flow, low in heat efficiency, slow in heating and long in heat conduction time due to the fact that a cold medium depends on a heating pipe channel, hot water stored in the heat exchanger is used up when a user bathes, the user can heat the hot water one round by one, the heating time is required to wait for a long time, the water consumption in the bathing process cannot be met, the hot water cannot be continuously discharged for exchange due to the defect, and the problem of hot water for bathing is solved, so that the defects exist in the prior art. The invention improves the defect application on the basis of the original patent.

Disclosure of Invention

The invention aims to provide a product which has simple process structure and high thermal efficiency and is of a split structure of a circular tubular header body or a D-shaped tubular header body; the header body is connected with a plurality of cold water pipes to store cold media, the cold media enter a heating pipe channel for the second time through a three-sleeve design scheme to continue heat conduction, so that the cold media are led out to control the flow speed by directly passing through 8mm cold water suction pipes for 6 meters, the flow length is increased, the heat exchange time is prolonged, the residence time of the cold media is longer than the flow speed of a heating heat source, and the heated cold media and the heating heat source have the same temperature as each other and have the heat exchange effect.

In order to achieve the purpose, the invention adopts the technical scheme that:

a header body three-sleeve water storage secondary heating heat exchanger comprises: the two header bodies are of a circular tube-shaped or D-shaped tube-shaped split structure; a cold water pipe, a heating pipe or a heating pipe connecting plate, a communicating pipe, an inner side pore plate, an outer side plate and an end cover plate; at least one heating pipe is arranged in a pipe cavity formed by hermetically connecting a plurality of cold water pipes and the inner side pore plate, and the heating pipes are communicated in a hermetic connection manner; the method is characterized in that: a cold water heat absorption pipe is arranged in at least one pipe cavity of the heating pipes; a cold water heat absorption pipe inserted into the pipe cavity of the heating pipe is fixedly connected with the cold fluid cavity of the header in a sealing way or is communicated with the pipe cavity of the cold water pipe to form a three-sleeve cold medium secondary continuous heating fast channel; the header body enclosed by the outer side plate, the inner side pore plate and the end cover plate in a sealed welding connection mode is a hot fluid cavity or a cold fluid cavity; a heating air inlet pipe joint, a heating air outlet pipe joint, a cold water inlet pipe joint and a cold water outlet pipe joint are arranged on the outer side plate of the header body or the end cover plate; form a circular tubular or D-shaped tubular header body and a three-sleeve water storage secondary heating heat exchanger.

The header body three-sleeve water storage secondary heating heat exchanger is characterized in that: the cold water heat absorption pipe is connected with the wall of the heating pipe and/or the heating pipe blocking plate in the heating pipe in a welding manner and communicated with the cold fluid cavity of the header or communicated with the inner cavity of the cold water pipe; the other end is hermetically and fixedly connected with a cold water outlet pipe joint.

The header body three-sleeve water storage secondary heating heat exchanger is characterized in that: the outer side plate of the circular tubular header is an arc plate, the inner side pore plate is an arc pore plate, and the arc plate is provided with an elliptical connecting hole; a cavity enclosed by the outer side plate, the inner side pore plate and the end cover plate is a header cold fluid cavity; the cold water heat absorption pipe inserted into the pipe cavity of the heating pipe is fixedly connected with the cold fluid cavity of the header in a sealing way.

The header body three-sleeve water storage secondary heating heat exchanger is characterized in that: the outer side plate of the D-shaped tubular header body is a C-shaped plate, the inner side pore plate is a plane plate, and the plane plate is provided with a flat plate connecting hole as an opening; a cavity formed by hermetically connecting and enclosing the outer side plate, the inner side hole plate and the end cover plate is a header cold fluid cavity; the heating pipe and the cold water heat absorption pipe of the cold water pipe cavity are hermetically welded and communicated in the header body cavity to form independent channels.

The header body three-sleeve water storage secondary heating heat exchanger is characterized in that: the communicating pipes arranged in the D-shaped tubular header body are divided into a heating pipe communicating pipe, a cold water pipe communicating straight pipe and a cold water pipe communicating bent pipe; the heating pipe connecting plate is divided into a heating pipe connecting whole plate and a heating pipe connecting single plate; the heating pipe connecting holes are formed in the heating pipe integral connecting plate and the heating pipe connecting single plate; a cold water pipe connecting hole is formed in the heating pipe connecting single plate; is convenient for being hermetically and fixedly connected with the insertion pipe.

The header body three-sleeve water storage secondary heating heat exchanger is characterized in that: a heating pipe connecting whole plate is arranged in the D-shaped tubular header body, and a cavity formed by the heating pipe connecting whole plate and the end cover plate sealing and plugging the end opening part is a cold fluid cavity channel of the header; the plurality of heating pipes penetrate through the pipe cavities of the plurality of cold water pipes and are inserted into the whole connecting plate of the heating pipes to be hermetically and fixedly connected; a cold water pipe connecting hole is formed in the pipe wall of one of the heating pipes, which is welded with the heating pipe connecting whole plate, so that a cold water heat absorbing pipe can be inserted and connected in a sealing manner; the inlet of the cold water heat absorption pipe is communicated with the cold fluid cavity of the header, and the other end of the cold water heat absorption pipe is connected with the pipe joint of the cold water outlet and is hermetically and fixedly connected with the outer side plate of the header.

The header body three-sleeve water storage secondary heating heat exchanger is characterized in that: the cold water pipe of the D-shaped tubular header body is inserted into the inner side pore plate to be fixedly connected in a sealing way and is not communicated; the cold water pipe is communicated with the adjacent pipe through a cold water pipe communication straight pipe or a cold water pipe communication bent pipe in a sealing connection way; the mouth parts at the two ends of the cold water pipe are provided with a heating pipe connecting single plate for sealing and plugging; a cavity enclosed by the outer side plate, the inner side pore plate and the end cover plate in a sealed and fixed manner is a header hot fluid cavity; a cold water pipe connecting hole is formed in the pipe wall of the closed connection of one of the heating pipes and the heating pipe connecting single plate, so that the cold water heat absorbing pipe can be inserted into the cold water pipe connecting hole and is fixedly connected with the pipe cavity of the cold water pipe in a closed manner; the other end is connected with a cold water outlet pipe joint and is hermetically and fixedly connected with the end cover plate.

The header body three-sleeve water storage secondary heating heat exchanger is characterized in that: the D-shaped tubular header body is provided with a plurality of heating pipes arranged in the cavities of the circular cold water pipes, and the heating pipes are communicated with one another in a welding manner through heating pipe communicating pipes; the end opening of the heating pipe is sealed and welded and plugged by a heating pipe plugging plate; wherein, the heating pipe blocking plate and/or the wall of the heating pipe are provided with cold water pipe connecting holes, which is convenient for the insertion, the sealing, the fixed connection and the communication of the cold water heat absorption pipes; or a U-shaped bent pipe is held between the heating pipes and inserted into the pipe cavity of the shell cold water circular pipe, and the other end of the U-shaped bent pipe is held to be in butt welding communication with the opening and the mouth of the U-shaped bent pipe of the adjacent heating pipe; or the heating pipe is cut into a 45-degree pipe, and the cutting openings are butt-welded and communicated with each other to form a fluid channel; the two ends of the heating pipe are welded with the joint of the heating inlet pipe and the joint of the heating outlet pipe and are fixedly connected with the outer side plate in a welding way to form a hot fluid circulation channel.

According to the technical scheme, the header body is connected with a plurality of cold water pipes to store cold media, the cold media enter a heating pipe channel for the second time through three sleeve pipes to continuously conduct heat, the cold media are led out through cold water heat absorption thin pipes with the length of 6 meters and the length of 8mm to control the flow speed, the flow length is increased, the exchanged time is prolonged, the residence time of the cold media is longer than the flow speed time of a heating heat source, the heat exchange effect that the temperature of the heated cold media is the same as that of the heating heat source is achieved, and the third sleeve pipe secondary heating heat exchanger is arranged in the header body.

According to the invention, the cold water heat absorption pipe 2 stirs the hot medium layer, so that heat transfer is enhanced, heat in the cavity 16 of the heating pipe is sufficiently conducted and converted for the second time, and heat absorption is fast, and the heat exchange quantity is improved; the diameter of a cold water heat absorption pipe 2 in the cavity of a heating pipe 16 is 8mm and the length of the cold water heat absorption pipe 2 is 6m, the cold water heat absorption pipe 2 is coiled back and forth to form the effect of stirring a flowing layer, the heat of the pipe wall of the heating pipe 16 is transferred to a cold medium in the cavity of the cold water pipe, the cold water heat absorption pipe 2 is inserted into the cavity of the hot medium of the heating pipe 16 to absorb the heat of the cold water heat absorption pipe quickly by a thin pipe, and a three-layer sleeve design scheme is formed.

The cold water heat absorption pipe coiled in the heating pipe cavity stirs the heating pipe heat flowing layer, so that heat transfer is enhanced, and the heat of the heating pipe cavity is fully absorbed and converted for the second time quickly; when the heat exchanger is not used, the temperature of cold medium water stored in the cold water pipe 1 and the temperature of a heating heat source are about 45-55 degrees, the cold medium water flows out through a cold water heat absorption pipe tubule at the moment, cold water is required to be blended for bathing during bathing, so that the detention time of cold water entering a pipe cavity of the cold water pipe in a first time period is long, the temperature of hot fluid in a pipe cavity of a heating inlet pipe is high, the cold water heat absorption pipe is arranged in the pipe cavity of the heating inlet pipe for carrying out secondary heat conduction temperature increase, which is equal to the increase of the primary heating time of cold medium newly entering the pipe cavity of the cold water, the design scheme of three sleeves of cold and hot fluid enables the cold medium to flow into the pipe cavity of the cold water heat absorption pipe arranged at the heating pipe channel for the second time and to be continuously heated, the heat conduction and flow path length are increased, the heat exchange transmission time is prolonged, the hot water exchanged and flowed out by the heat exchanger is continuous and uninterrupted, the heat exchange efficiency is maximized, and the temperature of the cold medium exchanged by the three sleeves of the heat exchanger is increased quickly, inventions at the same temperature as the heating heat source are contemplated.

Drawings

FIG. 1 is a schematic view of the external connection shape of the D-shaped tubular header body of the present invention.

Fig. 2 is a schematic view showing an external connection shape of a D-shaped tubular header body provided with a cold water pipe communication straight pipe 23 according to the present invention.

Fig. 3 is a schematic structural view of the coupling body of the present invention in a circular tube shape, an inner side orifice plate 3 of the coupling body is an arc plate, cold water pipe mounting holes are uniformly arranged on the arc plate, and are oval connecting holes 18 with oval edges turned inwards, an outer side plate 4 is an arc plate, and a pipe joint connecting hole 6 is arranged on the outer side plate 4; the inlet of the cold water heat absorption pipe 2 is connected with the pipe wall of the heating pipe 16 and communicated with the header cold fluid cavity 11, and the other end is connected with a cold water outlet pipe joint 10 and is hermetically and fixedly connected with the end cover plate 5.

FIG. 4 is a schematic view of the coupling body of the present invention in a circular tube-shaped structure, wherein the coupling body is a cold fluid cavity channel structure; the heating pipe 16 is connected with the heating pipe communicating pipe 12 in a welding mode, the heating inlet pipe joint 7, the heating outlet pipe joint 8, the cold water inlet pipe joint 9 and the cold water outlet pipe joint 10 are arranged on the header body at one end, and the heat exchanger is a structural schematic diagram of a first thread.

FIG. 5 is a schematic structural view of a D-shaped tubular header body of the present invention, wherein an inner side orifice plate 3 of the header body is a flat plate, a flat plate connecting hole 20 is formed in the flat plate, an outer side plate 4 is a C-shaped plate pressed with a reinforcing rib, and a pipe joint connecting hole 6 is formed in the outer side plate 4; the inlet of the cold water heat absorption pipe 2 is connected with the heating pipe blocking plate 17 in a welding way and is communicated with the header cold fluid cavity 11, and the other end of the cold water heat absorption pipe is connected with a cold water outlet pipe joint 10 and is fixedly connected with the end cover plate 5 in a sealing way.

Fig. 6 is a structural schematic diagram of the header body of the invention, which is a D-shaped tubular header body and is a channel of a header cold fluid cavity 11, wherein a heating inlet pipe joint 7 and a heating outlet pipe joint 8 are arranged at one end of the header body, a cold water inlet pipe joint 9 and a cold water outlet pipe joint 10 are arranged at the other end of the header body, and a heat exchanger is a structural schematic diagram of two threads.

FIG. 7 is a schematic view of the coupling body of the present invention being a D-shaped tubular coupling body, the coupling body being a dual-chamber channel structure; the cold water pipe 1 is directly and hermetically fixedly connected with the inner side pore plate 3, the heating pipe 16 penetrates through the pipe cavity of the cold water pipe and is welded and connected with the heating pipe connecting whole plate 19, and a cavity enclosed by the heating pipe connecting whole plate 19, the inner side pore plate 3 and the end cover plate 5 in a hermetically fixedly connected mode is a channel of a header cold fluid cavity 11; the inlet of the cold water heat absorption pipe 2 is connected with the pipe wall of the heating pipe 16 and communicated with the header cold fluid cavity 11, the other end is connected with a cold water outlet pipe joint 10 and is hermetically and fixedly connected with the outer side plate 4, and the structure schematic diagram of two threads of the heat exchanger is shown.

FIG. 8 is another structural schematic view of the D-shaped tubular header body of the present invention; a heating pipe connecting single plate 22 is arranged in the opening of the cold water pipe 1, and the cold water pipe connecting bent pipe 24 is hermetically communicated with the adjacent cold water pipe 1 through the heating pipe connecting single plate 22; the heating pipe 16 penetrates through the pipe cavity of the cold water pipe 1, is connected with a heating pipe connecting single plate 22 in a welding mode and is communicated with a header hot fluid cavity 21, and the cold water pipe 1 is not communicated with the inner side pore plate 3 in a welding mode; the inlet of the cold water heat absorption pipe 2 is connected with the pipe wall of the heating pipe 16 and communicated with the pipe cavity of the cold water pipe 1, and the other end of the cold water heat absorption pipe is connected with a cold water outlet pipe joint 10 and is fixedly connected with the end cover plate 5 in a sealing way.

Fig. 9 is a schematic view of the external connection shape structure of the round pipe-shaped header body of the present invention.

Fig. 10 is a schematic structural view of the end of the header body of the present invention in the shape of a circular tube.

Fig. 11 is a schematic structural view showing that, when the header body of the present invention is a circular pipe-shaped header body, the inner side orifice plate 3 is a circular arc plate, and the hole formed in the inner side orifice plate 3 is an oval connecting hole 18 with a flange.

Fig. 12 is a schematic structural view showing that the outer panel 4 is formed in a circular arc shape with the pipe joint attachment hole 6 when the coupling body of the present invention is a circular pipe-shaped coupling body.

Fig. 13 is another schematic view of fig. 12.

Fig. 14 is a schematic structural view of the inner side orifice plate 3 of the D-shaped tubular header of the present invention, and the inner side orifice plate 3 has a structure in which the plate connection hole 20 is turned over.

Fig. 15 is a left side view of fig. 14.

Fig. 16 is a schematic structural view showing that when the header body of the present invention is a D-shaped tubular header body, the outer side plate 4 is a C-shaped plate, and reinforcing ribs are pressed on the C-shaped plate to form pipe joint connection holes 6, and the cold water pipe 1 is externally connected to the inner side plate 3 at one end.

In the drawings: 1. a cold water pipe; 2. a cold water heat absorption pipe; 3. an inner orifice plate; 4. an outer panel; 5. an end cover plate; 6. a pipe joint connection hole; 7. a heating inlet pipe joint; 8. a heating outlet pipe joint; 9. a cold water inlet pipe joint; 10. a cold water outlet pipe joint; 11. a header cold fluid cavity; 12. a heating pipe communicating pipe; 13. a heating pipe U bend; 14. a cold water pipe connection hole; 15. a heating pipe connecting hole; 16. a heating pipe; 17. a heating pipe blocking plate; 18. an elliptical connection hole; 19. the heating pipe is connected with the whole plate; 20. a plate connection hole; 21. a header thermal fluid cavity; 22. the heating pipe is connected with the single plate; 23. the cold water pipe is communicated with the straight pipe; 24. the cold water pipe is communicated with the bent pipe.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

The header three-tube water storage secondary heating heat exchanger is shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, fig. 13, fig. 14, fig. 15 and fig. 16. The header body covers various technical scheme designs, a plurality of cold water pipes 1 and an inner side pore plate 3 are hermetically and fixedly connected into a whole; the combination of the header body is characterized by two shapes of a circular tube or a D-shaped tube;

scheme 1 is as follows: as shown in fig. 1: the external shape of the D-shaped tubular header body is shown schematically; as shown in fig. 2: the invention is a schematic external connection shape diagram of a D-shaped tubular header body with a cold water pipe communication straight pipe 23 and a cold water pipe 1 which are externally connected and communicated;

as shown in fig. 9 and 10: is a schematic view of the external connection shape of the round tubular header body.

As shown in fig. 3, 4, 5 and 6, the cold water pipe 1 is directly connected and communicated with the inner side pore plate 3 in a sealing way, the heating pipe 16 passes through the pipe cavity of the cold water pipe 1 and is connected and communicated in the header cavity, and the formed header body is a cross-sectional schematic view of the channel structure of the header cold fluid cavity 11.

The scheme 2 is as follows: as shown in fig. 7: the cold water pipe 1 is directly and airtightly fixedly connected with the inner side pore plate 3, the heating pipe 16 penetrates through the cold water pipe cavity to be connected with the heating pipe and is welded and connected with the whole plate 19, the heating pipe is connected with the whole plate 19 to form a cold and hot fluid partition plate, the inner cavity of the formed header is a channel 11 of the header cold fluid cavity, the outer cavity enclosed by the inner side plate 3, the outer side plate 4 and the end cover plate 5 is a cross-sectional schematic view of the structure of the channel 21 of the header hot fluid cavity, and the double-cavity channel structure characteristic of the header is formed.

Scheme 3 is as follows: as shown in fig. 8: a pipe orifice of the cold water pipe 1 is provided with a heating pipe connecting single plate 22 for plugging, the heating pipe 16 penetrates through the cold water pipe to be hermetically connected with the heating pipe connecting single plate 22, and the cold water pipe 1 is connected with the inner side pore plate 3 and is not communicated with the inner side pore plate; the multiple cold water pipes 1 are communicated with the adjacent pipes through cold water pipe communication elbows, and the formed header body is a structural section schematic diagram of a header hot fluid cavity 21 channel.

The cold water pipe 1 is connected with the inner side pore plate 3 without being communicated, and the cold water pipe is connected and communicated through a cold water communicating pipe in a welding way; the cold water communicating pipe is characterized by a cold water pipe communicating straight pipe 23 and a cold water pipe communicating bent pipe 24 (see fig. 2 and 8).

The heating pipe connecting plate is characterized by being divided into a heating pipe connecting whole plate 19 and a heating pipe connecting single plate 22 (see figures 7 and 8); the heating pipe 16 is connected and communicated with the header body through the heating pipe communicating pipe 12 to form a channel of the header cold fluid cavity 11 (see fig. 3 and 4); the heating pipe 16 is hermetically and fixedly communicated with a heating pipe connecting single plate 22, and a header body is a header hot fluid cavity 21 channel (see fig. 8); the heating pipe 16 is connected with the communicating header body through a heating pipe connecting whole plate 19 to form a header body double-cavity channel (see fig. 7).

As shown in the figure: the hole plate 3 on the inner side of the circular pipe-shaped header body described in fig. 3, 4, 9 and 10 is an arc plate, and cold water pipe connecting holes are uniformly formed in the arc plate, are oval connecting holes 18, and are inwards turned to form oval edges; the outer side plate 4 is a circular arc plate; the opening of the cold water pipe 1 is cut into a saddle opening, and the saddle opening of the cold water pipe 1 is inserted into the elliptical connecting hole of the circular-arc inner side pore plate 3 and is fixedly connected into a whole in a sealing way; the end cover plate 5 of the circular tubular header is a circular plane plate or a circular arc convex plate; a cavity defined by the arc inner side plate 3, the arc outer side plate 4 and the end cover plate 5 is a circular tubular header body which is a cold fluid cavity 11 channel of the header; the round tube-shaped header body has the advantages of strong pressure resistance, small welding deformation, internal stress generated when the heat exchanger expands with heat and contracts with cold, effective resistance to the internal stress of the round tube-shaped header body to damage the welding opening and crack, water leakage rate reduction, after-sale service cost reduction and the like.

As shown in the figure: the orifice plate 3 at the inner side of the D-shaped tubular header body shown in the figures 1, 2, 5 and 6 is a flat plate, or a plane plate is inwards or outwards folded with edges, and the flat plate is uniformly provided with cold water pipe flat plate connecting holes 20 and turned with edges; the outer side plate 4 is a C-shaped plate; the cold water pipe 1 is inserted into the inner side pore plate 3 and is sealed and fixedly connected into a whole; a cavity enclosed by the outer side plate 4, the inner side pore plate 3 and the end cover plate 5 in a closed connection mode is a header cold fluid cavity 11; the convenient insertition with the cold water pipe of trompil turn-ups is favorable to airtight linking firmly the welding UNICOM, and its welding bead intensity is high and is difficult for leaking to reduce welding deformation, the welding point can not be seen to the outside, makes the outside pleasing to the eye advantage of product.

The closed connection communication between the heating pipes 16 has a plurality of characteristics: one end of the heating pipe 16 is provided with a heating pipe connecting hole 15, the heating pipe communicating pipe 12 is inserted into the opening hole and is communicated in a sealing way, and the heating pipe blocking plate 17 seals and blocks the port part in a sealing way; the heating pipe 16 is held into a U-shaped bent pipe elbow of the heating pipe and is connected and communicated in a butt welding way; the heating pipe 16 is fixedly connected with the heating pipe connecting whole plate 19 in a sealing way and communicated with the cavity of the header body; the heating pipe 16 is fixedly connected with the heating pipe connecting single plate 22 in a sealing way and is communicated with various technical characteristics through a header cavity.

At least one heating pipe 16 is arranged in the cavity of the plurality of cold water pipes 1, and the heating pipes 16 are fixedly connected and communicated in a closed manner; a cold water heat absorption pipe 2 is arranged in one branch pipe cavity of the heating pipe 16; the inlet of a cold water heat absorption pipe 2 inserted into the pipe cavity of the heating pipe 16 is connected with the pipe wall of the heating pipe and/or a heating pipe blocking plate 17 in a welding way and communicated with a header cold fluid cavity 11 or communicated with the inner cavity of a cold water pipe; the other end is connected with a cold water outlet pipe joint 10 and is hermetically and fixedly connected with an end cover plate 5 or an outer side plate; a heating pipe 16 and a cold water heat absorption pipe 2 which are arranged in the pipe cavity of the cold water pipe 1 are hermetically welded and connected into independent channels; three sleeve cold medium secondary continuous heating fast channels are combined; the cold water heat absorption pipe 2 stirs the heat medium layer to enhance heat transfer, so that heat in the cavity of the heating pipe 16 is sufficiently conducted and converted for the second time to absorb heat quickly, and the heat exchange quantity is improved; the cold and hot fluid three sleeves are heated for the second time to increase the flow length of the cold fluid, prolong the heat exchange transfer time, and maximize the effect of continuously exchanging the outflow hot water and the heat efficiency; the cold water heat absorption pipe 2 with the diameter of 8mm and the length of about 6m is arranged in the pipe cavity of the heating pipe 16, the cold water heat absorption pipe 2 is coiled back and forth to form the effect of stirring a flowing layer, the heat of the pipe wall of the heating pipe 16 is transferred to a cold medium in the inner cavity of the cold water pipe, the cold water heat absorption pipe 2 is inserted into the inner cavity of the heating pipe 16 (the hot medium) to absorb the heat of the cold water quickly by a thin pipe, a three-layer sleeve design scheme is formed, a cold fluid and hot fluid three sleeve is heated for the second time to increase the flow length of a cold fluid, the heat exchange transfer time is prolonged, the effect of uninterrupted exchange of outflow hot water is achieved, and the heat efficiency is maximized; the purpose of the invention is to stipulate the reverse flowing direction of the cold fluid, control the heat exchanger to flow the cold medium newly supplemented from the cold water inlet joint into the pipe cavity of the cold water pipe 1 to be mixed with the original stored heated water to reduce the heat exchange effect, the thin cold water heat absorption pipe 2 can control the flow speed of the cold medium, change the flowing path and length of the cold medium, force the retention and heating time of the cold fluid to be prolonged, and improve the heat exchange efficiency.

The cold water heat absorption pipe coiled in the heating pipe cavity stirs the heating pipe heat flowing layer, so that heat transfer is enhanced, and the heat of the heating pipe cavity is fully absorbed and converted for the second time quickly; when the heat exchanger is not used, the temperature of the stored hot water is 45-55 degrees as the same temperature of a heating heat source, the hot water flows out through the thin tube of the cold water heat absorption tube, and the cold water is required to be blended to wash when the bath is carried out, so that the cold water entering the tube cavity of the cold water tube 1 in the first time period is long in retention and heating time, the temperature of the hot fluid in the tube at the heating inlet section is high, the cold water heat absorption tube is arranged in the tube cavity of the inlet section, the temperature of the second heat conduction is increased quickly, the time for increasing and prolonging the cold water entering the tube cavity of the cold water tube is long for the first heating time, the temperature of a heat exchange cold medium of the three-sleeve tube of the heat exchanger is increased quickly, and the invention is expected that the temperature of the heat exchanger is the same as the temperature of the heating heat source.

The outer side plate 4, the inner side pore plate 3 and the end cover plate 5 are hermetically welded to block the port part to form a header cold fluid cavity 11 or a header hot fluid cavity 21.

A heating inlet pipe joint 7, a heating outlet pipe joint 8, a cold water inlet pipe joint 9 and a cold water outlet pipe joint 10 are fixedly connected to the outer side plate 4 or the end cover plate 5; the arrangement positions of the four pipe joints can be designed according to the size of a user installation space and the direction of a reserved pipe network interface, and the vertical installation or transverse installation design of the heat exchanger can be flexibly selected; the fixed position of the pipe joint is arranged on the outer side plate 4, the end cover plate 5 can also be arranged interchangeably and is communicated with the cold fluid pipe cavity and the hot fluid pipe cavity to form a header body three-sleeve water storage secondary heating heat exchanger.

The diameter of the cold water pipe 1 is 76-89 mm, the straight diameter of the heating pipe 16 provided with the cold water heat absorption pipe 2 is 51-63 mm, and the straight diameter of the other heating pipes 16 not provided with the cold water heat absorption pipe 2 is 25-38 mm; the inner cavity of the side pipe of the cold water pipe 1 is provided with a thick heating pipe, the heating communication pipe is a thin pipe, and the communication structure forms turbulent flow and enhances the advantage of heat transfer; the thick heating pipe is conveniently inserted into the cold water heat absorption pipe 2 with the length of 6m for convenient connection; when the heat exchanger is vertically installed, the gas capacity of the thick heating pipe is large, gas entering the heat exchanger from a pipe network is not easy to block a hot fluid channel, and the circulation of heating fluid is not influenced or the exhaust through an exhaust valve is convenient; the design of the same pipe diameter of the heating pipe in the prior art, the vertical installation of the heat exchanger easily causes the air plug to lead to the hot fluid not to circulate, and the water heater has to go to the defects of gas discharge at the user position to dredge the heat exchanger and the like when heating.

Example 2, as shown: 3, 4, 5, 6, 7 and 8, wherein the cold water heat absorption pipe 2 is inserted into the cavity of the heating pipe 16, and the inlet of the cold water heat absorption pipe 2 is connected with the wall of the heating pipe 16 in a welding way and communicated with the header cold fluid cavity 11; the other end is connected with a cold water outlet pipe joint 10 and is fixedly connected with an end cover plate 5 in a sealing way (see figures 3 and 4); an inlet of a cold water heat absorption pipe 2 inserted into the cavity of the heating pipe 16 is connected with the pipe wall of the heating pipe 16 and communicated with a header cold fluid cavity 11, and the other end of the cold water heat absorption pipe is hermetically and fixedly connected with a cold water outlet pipe joint 10 and an outer side plate 4 (see figure 6); an inlet of the cold water heat absorption pipe 2 is connected with a heating pipe blocking plate 17 in a welding manner and is communicated with a header cold fluid cavity 11, and the other end of the cold water heat absorption pipe is connected with a cold water outlet pipe joint 10 and is fixedly connected with an end cover plate 5 (see figure 5); forming a three-sleeve cold fluid secondary heat absorption fast channel; the length of the cold medium flow is increased, so that the cold medium path is changed, the heat conduction time is prolonged, and the heat exchange efficiency is improved.

The heating pipe 16 is internally provided with a cold water heat absorption pipe 2 with the diameter of 8mm and the length of 6m, the cold water heat absorption pipe 2 is coiled back and forth to form the effect of stirring a flowing layer, the heat of the pipe wall of the heating pipe 16 is transferred to a cold medium in the inner cavity of the cold water shell pipe, the cold water heat absorption pipe 2 is inserted into the hot medium cavity of the heating pipe 16 to absorb the heat of the cold water heat absorption pipe quickly by the thin pipe, the design scheme of forming the three-layer casing pipe for quick secondary heating is superior to the prior art, the purpose of the invention is to stipulate the reverse flowing direction of a cold fluid, control the flow velocity of the cold medium, change the flowing path and the length of the cold medium, force the retention and heating time of the cold fluid to be prolonged, and improve the heat exchange efficiency.

The heating pipe 16 arranged in the pipe cavity at the side of the cold water pipe 1 is a thick pipe, the coiled cold water heat absorption pipe 2 is inserted into the pipe cavity of the thick heating pipe 16, the thin pipe is coiled and inserted into the pipe cavity of the hot fluid to stir the flowing layer and enhance heat transfer, the heat of the hot fluid is sufficiently absorbed and converted for the second time, and the heat exchange amount is improved; the end part of the heating pipe is provided with a heating pipe blocking plate 17, wherein a cold water pipe welding hole 14 is punched on the heating pipe blocking plate 17 or a cold water pipe welding hole 14 is punched on the pipe wall of the heating pipe 16; the cold water heat absorption pipe 2 is conveniently inserted and welded, and water leakage is not easy to occur (see figures 5 and 6); two ports of the cold water heat absorption pipe 2 inserted into the pipe cavity of the heating pipe 16 are connected with a welding hole 14 of a cold water pipe on a heating pipe blocking plate 17 in a welding way and communicated with a header cold fluid cavity 11 (see figure 5), and the other end of the cold water heat absorption pipe extends out of the pipe wall of the heating pipe 16 to be welded with the welding hole 14 of the cold water pipe and then is connected with a cold water pipe joint 10 in a welding way to form a secondary continuous heat absorption fast channel;

the two ports of the cold water heat absorption pipe 2 inserted into the inner cavity of the heating pipe 16 are connected with the welding hole 14 of the cold water pipe on the heating pipe 16 in a welding way and communicated with the inner cavity of the cold water pipe 1, and the other end of the cold water heat absorption pipe is connected with the welding hole 14 of the cold water thin pipe on the heating pipe 16 in a welding way and then fixedly connected with the cold water outlet pipe joint 10 in a welding way; the length of the flow path of the cold fluid channel is increased, the heating time is prolonged, the heat transfer quantity is improved, and the cold water inlet pipe joint is fixedly connected with the pipe wall of the round cold water pipe 1 in a welding mode and communicated with the pipe cavity (see the figures 3 and 4).

In embodiment 3, as shown in fig. 3, 4, 9, and 10 (circular tube-shaped header), the outer side plate 4 of the circular tube-shaped header is an arc plate, the inner side orifice plate 3 is an arc orifice plate, and the arc plate is provided with an elliptical connecting hole 18; a cavity enclosed by the outer side plate 4, the inner side pore plate 3 and the end cover plate 5 is a header cold fluid cavity 11; punching and cutting the round cold water pipe 1 into a saddle opening; the saddle port of the round cold water pipe 1 is inserted into the circular arc inner side orifice plate 3, and the two parts are tightly matched, thereby being beneficial to sealing and fixedly connecting the two parts into a whole; the welding strength is high, the stability is strong, water leakage is not easy to occur, the welding deformation is reduced, the welding point of the cold water pipe cannot be seen outside the heat exchanger, and the product appearance is attractive; the heating pipes 16 are communicated through the heating pipe communicating pipe 12 or through a holding bent pipe in a sealing and welding way; the heating pipe plugging plate 17 plugs the end opening of the heating pipe in a sealing way; an inlet of the cold water heat absorption pipe 2 inserted into one of the heating pipes 16 is hermetically welded with the pipe wall of the heating pipe 16 and communicated with the header cold fluid cavity 11; the other end is connected with a cold water outlet pipe joint 10 and is fixedly connected with an end cover plate 5 in a sealing way; a heating inlet pipe joint 7, a heating outlet pipe joint 8, a cold water inlet pipe joint 9 and a cold water outlet pipe joint 10 are arranged on the header body at one end, and the heat exchanger is structurally characterized by a monofilament;

the end cover plate 5 of the circular tubular header is a circular plane plate or an inward concave plate; the end cover plate 5 is fixedly connected with the circular tube-shaped header body in a sealing way to seal the end opening part; form a circular pipe shaped header body three-sleeve water storage secondary heating heat exchanger.

In embodiment 4, as shown in fig. 1, 2, 5, and 6 (D-shaped tubular header), the outer plate 4 of the D-shaped tubular header is a C-shaped plate with reinforcing ribs pressed thereon, the inner hole plate 3 is a flat plate, or the edge of the flat plate is folded inward or outward to form a reinforcing edge, and the flat plate is provided with an opening, i.e., the edge of the flat plate connecting hole 20 is turned over; a cavity enclosed by the outer side plate 4, the inner side pore plate 3 and the end cover plate 5 is a header cold fluid cavity 11; the cold water round pipe 1 is inserted into the inner side pore plate 3, the parts of the inner side pore plate 3 are tightly matched, so that the closed welding connection is facilitated to be integrated; the welding strength is high, the stability is good, water leakage is not easy to occur, welding deformation is reduced, and the welding point of the cold water pipe cannot be seen from the outside of the heat exchanger, so that the appearance is attractive; the heating pipes 16 are communicated through the heating pipe communicating pipe 12 or through a holding bent pipe in a sealing and welding way; the heating pipe plugging plate 17 plugs the end opening of the heating pipe in a sealing way; the heating pipe blocking plate 17 is provided with a cold water pipe connecting hole 14 with a turned edge, and the heating pipe 16 is provided with a cold water pipe connecting hole 14 with a turned edge; the inlet of a cold water heat absorption pipe 2 inserted into the cavity of the heating pipe 16 is fixedly connected with an opening on a heating pipe blocking plate 17 in a sealing way and is communicated with a header body cold fluid cavity 11, and the other end of the cold water heat absorption pipe is connected with a cold water outlet pipe joint 10 and is fixedly connected with a header outer side plate 4 or an end cover plate 5 in a sealing way; a heating inlet pipe joint 7, a heating outlet pipe joint 8, a cold water inlet pipe joint 9 and a cold water outlet pipe joint 10 are fixedly connected on the outer side plate 4 or the end cover plate 5, and the heat exchanger is characterized by a two-end thread structure;

example 5, as shown: fig. 1, 2, 3, 4, 7, and 8 (D-shaped header). The communication pipes arranged in the D-shaped tubular header body are divided into a heating pipe communication pipe 12, a cold water pipe communication straight pipe 23 and a cold water pipe communication bent pipe 24; the heating pipe connecting plate is divided into a heating pipe connecting whole plate 19 and a heating pipe connecting single plate 22; the heating pipe connecting holes 15 are formed in the heating pipe integral connecting plate 19 and the heating pipe connecting single plate 22; the heating pipe connecting single plate 22 is provided with a cold water pipe connecting hole 14; the hole flanging is beneficial to the good welding and the fixed connection of the inserted pipe, the welding quality is improved, and the water leakage rate is reduced.

Example 6, as shown: a heating pipe connecting whole plate 19 is arranged in the D-shaped tubular header body shown in the figures 1 and 7 (D-shaped header body), and the heating pipe connecting whole plate 19 is folded with edges and is provided with a heating pipe connecting hole 15 to facilitate the insertion connection of the heating pipe; the heating pipe is connected with the whole plate 19 and the end cover plate 5 to seal and plug the end opening, and an inner cavity formed by sealing and welding the whole plate 19, the inner side pore plate 3 and the end cover plate 5 is a channel of the header cold fluid cavity 11; the plurality of heating pipes 16 penetrate through the pipe cavities of the plurality of cold water pipes 1 and are inserted into the heating pipe connecting holes 15 on the heating pipe connecting whole plate 19 to be hermetically and fixedly connected; a cold water pipe connecting hole 14 is formed in the pipe wall of one of the heating pipe 16 and the heating pipe connecting whole plate 19 which are connected in a welding manner; an inlet of the cold water heat absorption pipe 2 is fixedly connected with the pipe wall of the heating pipe 16 in a sealing way and communicated with the header cold fluid cavity 11; the other end is connected with a cold water outlet pipe joint 10 and is fixedly connected with the header outer side plate 4 in a sealing way; an outer cavity formed by sealing, welding and blocking the port part by the outer side plate 4, the inner side pore plate 3 and the end cover plate 5 is a header hot fluid cavity 21; combined into a header body double-cavity fluid channel.

Example 7, as shown: in the figures 1, 2 and 8, the cold water pipe 1 of the D-shaped tubular header body is inserted into the inner side pore plate 3 and is hermetically and fixedly connected into a whole without communication; the cold water pipe 1 is hermetically connected and communicated with an adjacent pipe through a cold water pipe communicating straight pipe 23 or a cold water pipe communicating bent pipe 24; the mouth parts of the two ends of the cold water pipe 1 are provided with a heating pipe connecting single plate 22 for sealing and plugging; the heating pipe connecting single plate 22 is provided with a heating pipe connecting hole 15 and a cold water pipe connecting hole 14, which are beneficial to the good welding connection of the inserted pipes; a plurality of heating pipes 16 penetrate through the pipe cavity of the circular cold water pipe 1 and are fixedly connected with the heating pipe connecting single plate 22 in a sealing way; the cold water pipe communication elbow pipe 24 and the heating pipe connection single plate 22 are fixedly connected with the adjacent cold water pipes 1 in a sealing welding mode; or the end parts of a plurality of cold water pipes 1 are provided with cold water pipe connecting holes 14, and the cold water pipe connecting straight pipes 24 hermetically connect and communicate the adjacent cold water pipes 1; a cold water heat absorption pipe 2 is arranged in a pipe cavity of one of the heating pipes 16, a cold water pipe connecting hole 14 is formed in the pipe wall at one end of the heating pipe 16, which is in welded connection with a heating pipe connecting single plate 22, so that the cold water heat absorption pipe 2 can be conveniently inserted into the pipe cavity of the cold water pipe 1 to be fixedly connected in a sealing manner, the inlet of the cold water heat absorption pipe 2 is communicated with the pipe cavity of the cold water pipe 1, the cold water heat absorption pipe 2 is inserted into the pipe cavity of the heating pipe 16 (heat medium) to enable the heat of the cold water heat absorption pipe to be quickly absorbed by the thin cold water heat absorption pipe 2, and the other end of the cold water heat absorption pipe is connected with a cold water outlet pipe joint 10 and fixedly connected with an end cover plate 5 in a sealing manner; the end cover plate 5 is punched into a D-shaped plate; the cavity enclosed by the outer side plate 4, the inner side pore plate 3 and the end cover plate 5 in a sealed and fixedly connected mode is a fluid channel of a header hot fluid cavity 21.

In embodiment 8, as shown in fig. 1, 5, and 6, the heating pipes 16 are disposed in the lumens of the plurality of cold water pipes 1 of the D-shaped tubular header body, and the heating pipes 16 are welded and communicated with each other through the heating pipe communicating pipe 12; the port part of the heating pipe 16 is sealed and welded and plugged by a heating pipe plugging plate 17; wherein, a cold water pipe connecting hole 14 is arranged on the heating pipe blocking plate 17 and/or the wall of the heating pipe 16, which is convenient for the cold water heat absorbing pipe 2 to be inserted, sealed, fixedly connected and communicated; or a U-shaped bent pipe is held between the heating pipes 16 and inserted into the pipe cavity of the shell cold water circular pipe 1, and the other end of the U-shaped bent pipe is held to be in butt welding communication with the opening and the opening of the adjacent heating pipe U-shaped bent pipe 13; or the heating pipe 16 is cut into a 45-degree pipe, and the cutting openings are butt-welded and communicated with each other to form a fluid channel; two ends of the heating pipe 16 are welded with the heating inlet pipe joint 7 and the heating outlet pipe joint 8 and are fixedly connected with the outer side plate 4 to form a hot fluid circulation channel.

Claims

1. A header body three-sleeve water storage secondary heating heat exchanger comprises: the two header bodies are of a circular tube-shaped or D-shaped tube-shaped split structure; the cold water pipe (1), the heating pipe (16) or the heating pipe connecting plate, the communicating pipe, the inner side pore plate (3), the outer side plate (4) and the end cover plate (5); at least one heating pipe (16) is arranged in a pipe cavity formed by hermetically connecting a plurality of cold water pipes (1) and the inner side pore plate (3), and the heating pipes (16) are hermetically connected and communicated; the method is characterized in that: a cold water heat absorption pipe (2) is arranged in at least one of the heating pipes (16); a cold water heat absorption pipe (2) inserted into the pipe cavity of the heating pipe (16) is fixedly connected with the cold fluid cavity (11) of the header in a sealing way or is communicated with the pipe cavity of the cold water pipe (1) to form a three-sleeve cold medium secondary continuous heating fast channel; the header body enclosed by the outer side plate (4), the inner side pore plate (3) and the end cover plate (5) in a sealed welding way is a hot fluid cavity or a cold fluid cavity; a heating air inlet pipe joint (7), a heating air outlet pipe joint (8), a cold water inlet pipe joint (9) and a cold water outlet pipe joint (10) are arranged on the header body outer side plate (4) or the end cover plate (5); form a circular tubular or D-shaped tubular header body and a three-sleeve water storage secondary heating heat exchanger.

2. The header body three-sleeve water storage secondary heating heat exchanger as claimed in claim 1, which is characterized in that: the cold water heat absorption pipe (2) is connected with the pipe wall of the heating pipe (16) and/or the heating pipe blocking plate (17) in the heating pipe in a welding way and communicated with the header cold fluid cavity (11) or communicated with the inner cavity of the cold water pipe (1); the other end is hermetically and fixedly connected with a cold water outlet pipe joint (10).

3. The header body three-sleeve water storage secondary heating heat exchanger as claimed in claim 1, which is characterized in that: the outer side plate (4) of the circular tube-shaped header is an arc plate, the inner side pore plate (3) is an arc pore plate, and an oval connecting hole (18) is arranged on the arc plate; a cavity enclosed by the outer side plate (4), the inner side pore plate (3) and the end cover plate (5) is a header cold fluid cavity (11); the cold water heat absorption pipe (2) inserted into the pipe cavity of the heating pipe (16) is fixedly connected with the cold fluid cavity (11) of the header in a sealing way.

4. The header body three-sleeve water storage secondary heating heat exchanger as claimed in claim 1, which is characterized in that: the outer side plate (4) of the D-shaped tubular header body is a C-shaped plate, the inner side pore plate (3) is a plane plate, and the plane plate is provided with a flat plate connecting hole (20) as an opening; a cavity enclosed by the outer side plate (4), the inner side pore plate (3) and the end cover plate (5) in a closed connection mode is a header cold fluid cavity (11); the heating pipe (16) of the cold water pipe cavity and the cold water heat absorption pipe (2) are hermetically welded and communicated in the header body cavity to form independent channels.

5. The header body three-sleeve water storage secondary heating heat exchanger as claimed in claim 1, which is characterized in that: the communicating pipes arranged in the D-shaped tubular header body are divided into a heating pipe communicating pipe (12), a cold water pipe communicating straight pipe (23) and a cold water pipe communicating bent pipe (24); the heating pipe connecting plate is divided into a heating pipe connecting whole plate (19) and a heating pipe connecting single plate (22); the heating pipe connecting whole plate (19) and the heating pipe connecting single plate (22) are both provided with heating pipe connecting holes (15); a cold water pipe connecting hole (14) is arranged on the heating pipe connecting single plate (22); is convenient for being hermetically and fixedly connected with the insertion pipe.

6. The header three-pipe water storage secondary heating heat exchanger as claimed in claim 1, 4 or 5, which is characterized in that: a heating pipe connecting whole plate (19) is arranged in the D-shaped tubular header body, and a cavity formed by the heating pipe connecting whole plate (19) and the end cover plate (5) in a sealing and blocking way is a cold fluid cavity (11) channel of the header; the plurality of heating pipes (16) penetrate through the pipe cavities of the plurality of cold water pipes (1) and are inserted into the whole connecting plate (19) of the heating pipes to be hermetically and fixedly connected; a cold water pipe connecting hole (14) is formed in the pipe wall of one of the heating pipe (16) and the heating pipe connecting whole plate (19) in welded connection, so that the cold water heat absorbing pipe (2) can be inserted into the cold water pipe connecting hole in a sealed connection; the inlet of the cold water heat absorption pipe (2) is communicated with the cold fluid cavity (11) of the header, and the other end of the cold water heat absorption pipe is connected with a cold water outlet pipe joint (10) and is fixedly connected with the outer side plate (4) of the header in a sealing way.

7. The header three-pipe water storage secondary heating heat exchanger as claimed in claim 1, 4 or 5, which is characterized in that: the cold water pipe (1) of the D-shaped tubular header body is inserted into the inner side pore plate (3) to be hermetically fixedly connected without communication; the cold water pipe (1) is communicated with an adjacent pipe in a sealing connection way through a cold water pipe communication straight pipe (23) or a cold water pipe communication bent pipe (24); the mouth parts at the two ends of the cold water pipe (1) are provided with a heating pipe connecting single plate (22) for sealing and plugging; a cavity enclosed by the outer side plate (4), the inner side pore plate (3) and the end cover plate (5) in a sealed and fixed manner is a header hot fluid cavity (21); a cold water pipe connecting hole (14) is formed in the pipe wall of one of the heating pipes (16) hermetically connected with the heating pipe connecting single plate (22) so that the cold water heat absorbing pipe (2) can be inserted into the cold water pipe connecting hole and is hermetically fixedly connected with the pipe cavity of the cold water pipe (1); the other end is connected with a cold water outlet pipe joint (10) and is hermetically and fixedly connected with an end cover plate (5).

8. The header three-pipe water storage secondary heating heat exchanger as claimed in claim 1 or 4, wherein: the heating pipes (16) are arranged in the pipe cavities of the multiple cold water pipes (1) of the D-shaped tubular header body, and the heating pipes (16) are communicated through welding through heating pipe communicating pipes (12); the port part of the heating pipe (16) is sealed and welded and plugged by a heating pipe plugging plate (17); wherein, a cold water pipe connecting hole (14) is arranged on the heating pipe blocking plate (17) and/or the wall of the heating pipe (16), which is convenient for the cold water heat absorbing pipe (2) to be inserted, sealed, fixedly connected and communicated; or a U-shaped bent pipe is held between the heating pipes (16) and inserted into the pipe cavity of the shell cold water pipe (1), and the other end of the U-shaped bent pipe is held to be in butt welding communication with the opening and the opening of the adjacent heating pipe U-shaped bent pipe (13); or the heating pipe (16) is cut into a 45-degree pipe, and the cutting openings are butt-jointed, welded and communicated with each other to form a fluid channel; two ports of the heating pipe (16) are welded with the heating inlet pipe joint (7) and the heating outlet pipe joint (8) and are welded and fixedly connected with the outer side plate (4) to form a hot fluid circulation channel.