CN218523988U - Main heat exchange device for improving heat efficiency of wall-mounted boiler - Google Patents

Abstract

The utility model relates to a main heat exchange device of hanging stove has especially related to a main heat exchange device who improves hanging stove heat efficiency, be equipped with the cold water box on the cold water joint of constitution heat exchanger, it has four group's pipe fittings to cover to open at the water box of every group water box and connects, it connects to be equipped with out the hot water joint to go out at two pipe fittings tube head delivery port departments that parallel, be equipped with heat conduction fin on the pipe fitting, a plurality of groups heat conduction fin establish side by side and form netted heat conduction fin on the pipe fitting, this main heat exchange device who improves hanging stove heat efficiency solves the problem that traditional hanging stove heat exchange efficiency is low, be equipped with two-way pipe fitting side by side in heat exchanger, the direct heat receiving area of pipe fitting has been increased by a wide margin, two pipeline mixes many times and the heat distribution that the turn made water gets more evenly.

Description

Main heat exchange device for improving heat efficiency of wall-mounted boiler

Technical Field

The utility model relates to a main heat exchange device of hanging stove has especially related to a main heat exchange device who improves hanging stove thermal efficiency.

Background

With the improvement of life quality, people usually choose a wall-mounted boiler for heating in winter, the wall-mounted boiler obtains heat by burning natural gas, then transfers the heat into heating water, a water pump in the wall-mounted boiler enables the heating water to flow circularly, hot water is transferred to indoor ground heating or a radiator for heat dissipation, cold hot water continuously returns to the wall-mounted boiler to be continuously heated and then is transferred to indoor for heat dissipation, and the effect of indoor temperature rise is achieved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an improve main heat exchange device of hanging stove thermal efficiency, this improve main heat exchange device of hanging stove thermal efficiency solves the problem that the heat exchange efficiency is low of traditional hanging stove, is equipped with the two-way pipe fitting that stands side by side in heat exchanger, has increased the direct heat receiving area of pipe fitting by a wide margin, and two pipelines mix many times and turn the heat distribution that makes water more even.

In order to achieve the purpose, the utility model provides a main heat exchange device for improving the thermal efficiency of a wall hanging furnace, which comprises a main machine, a cold water inlet interface, a hot water outlet interface, a gas interface, a water pump, a high-pressure igniter, a gas burner, a heat exchanger, a fan, a wind outlet pipe, a gas valve, a hot water outlet joint, a cold water joint, pipe fittings, heat conducting fins, a heat conducting fin, a pipe port, a heat conducting sealing sheet, a water box cover and a pipe fitting joint, wherein the main machine is respectively provided with the cold water inlet interface, the hot water outlet interface and the gas interface, the gas pipe connected with the gas interface is inserted into the main machine, the gas pipe is connected to the gas valve inside the main machine, the gas valve is provided with the high-pressure igniter, the gas heat pipe on the gas valve is connected to the gas burner at the upper part inside the main machine, the upper part of the gas burner is provided with the heat exchanger, the cold water enters a cold water pipe connected with an interface and penetrates into the host, the cold water pipe is connected with a water pump in the host, the cold water pipe on the water pump is connected with a cold water joint of a heat exchanger, a hot water outlet joint is arranged on the heat exchanger, a hot water pipe connected with a hot water outlet interface penetrates into the host, the hot water pipe is connected with a hot water outlet joint of the heat exchanger in the host, a fan is arranged at the upper part of the heat exchanger, an air outlet pipe is connected on the fan and penetrates out of the top of the host, a cold water box is arranged on the cold water joint of the heat exchanger and is in parallel straight line with a plurality of water boxes, a water box cover is arranged on the box opening surfaces of the cold water box and the plurality of water boxes, the water box cover is in a strip plate shape, two groups of pipe fittings are arranged on the water box cover of the cold water box, four groups of pipe fittings are arranged on the water box cover of each group of water box, a hot water box is arranged on the hot water joint, and is in parallel straight line with the plurality of water boxes, the heat exchanger is characterized in that a water box cover is arranged on the box opening surfaces of a hot water tank and a plurality of water boxes, two groups of pipe fittings are arranged on the water box cover of the hot water box, a cold water box group of a cold water joint and the head of a hot water box group of a hot water joint are staggered, two groups of parallel pipe fittings are connected onto the water box cover pipe fittings of the cold water box, the tail ends of two pipe fittings on the cold water box are connected onto the water box cover pipe fittings of the water box, two groups of parallel pipe fittings are arranged on the remaining two groups of pipe fittings on the water box cover, the tail ends of the two groups of pipe fittings are inserted into the water box cover provided with the same four groups of pipe fittings, S-shaped water pipe channels are combined in series through the S-shaped superposition of the plurality of pipe fittings and the water box cover, the pipe fittings are strip-shaped flat pipe bodies, the lengths of the plurality of pipe fittings on the heat exchanger are consistent, hot water outlets of the two groups of pipe fittings are provided with heat outlet joints, heat conduction fins are arranged on the pipe fittings, the heat conduction fins are strip plates, heat conduction fins, the heat conduction fins are arranged on the heat conduction pipe bodies, the heat conduction pipe openings of the heat conduction pipe, the heat conduction fins are arranged on the left and right sides of the heat conduction pipe bodies of the heat conduction fins, and the heat conduction fins, the heat conduction fins are aligned to form heat conduction fins.

Compared with the prior art, the utility model has the advantages of: the wall-mounted boiler is characterized in that a cold water inlet port, a hot water outlet port and a gas port are respectively arranged at the bottom of the main machine, the wall-mounted boiler respectively comprises a cold water inlet port, a hot water outlet port and a gas port, the cold water inlet port, the hot water outlet port and the gas port are used for heating cold water by converting heat energy through gas, hot water is discharged from the hot water outlet port, a gas pipe connected with the gas port penetrates into the main machine and is connected to a gas valve inside the main machine, the gas valve controls the gas valve to open and close the gas valve of the gas pipe, a high-pressure igniter is arranged on the gas valve, the gas entering from the gas valve is ignited by the high-pressure igniter and enters the gas burner to generate hot heat, a gas heat pipe on the gas valve is connected to the gas burner at the upper part inside the main machine, the gas burner is responsible for converting the heat energy of the burning gas and heating the heat exchanger, and a heat exchanger is arranged at the upper part of the gas burner, the cold water in the heat exchanger is heated by the hot combustion, the heat exchanger can more effectively increase the heated area and efficiency, the cold water enters a cold water pipe connected with an interface and penetrates into a host machine, the cold water pipe is connected to a water pump in the host machine, the water pump controls the input work of the cold water in the cold water pipe, the cold water pipe on the water pump is connected to a cold water joint of the heat exchanger, the cold water in the water pump flows into the heat exchanger, a hot water outlet joint is arranged on the heat exchanger, the heated hot water is discharged from the hot water outlet joint of the heat exchanger, a hot water pipe connected with the hot water outlet interface penetrates into the host machine, the hot water pipe is connected to the hot water outlet joint of the heat exchanger in the host machine, the hot water outlet joint is connected to a hot water outlet joint on the host machine through a heat pipe, the required hot water is output by the hot water outlet joint, the upper part of the heat exchanger is provided with a fan, and the hot gas and the smoke generated by the gas burner, the gas is discharged out of the main machine through the fan, the smoke is prevented from being accumulated in the main machine, hot combustion and short circuit are caused to internal parts of the main machine, the fan is connected with an air outlet pipe, the air outlet pipe penetrates out of the top of the main machine, the fan discharges the smoke through an air outlet pipe opening, a cold water box is arranged on a cold water joint of the heat exchanger, the cold water box is in parallel straight line with a plurality of water boxes, a water box cover is arranged on the box opening surfaces of the cold water box and the plurality of water boxes, the water box cover is in a long and flat shape and is used for receiving hot water flowing in the pipe, two groups of pipe fittings on the upper part of the water box cover of the water box are connected with water inlet pipe fittings, two groups of pipe fittings on the lower part of the water box cover of the water box are connected with water outlet pipe fittings, the water boxes are installed in a left-right cross mode through a plurality of groups of pipes, then the groups of pipe fittings are connected onto the water box, an S-shaped water pipe channel is formed by combination, and two groups of pipe fittings are arranged on the water box cover of the cold water box, four sets of pipe fittings are arranged on the water box cover of each set of water box, a hot water box is arranged on the hot water connector, the hot water box and a plurality of water boxes are in parallel straight line, the water box covers are arranged on the box opening surfaces of the hot water box and the plurality of water boxes, two sets of pipe fittings are arranged on the water box cover of the hot water box, the cold water box set of the cold water connector and the hot water box connector head of the hot water connector are staggered, two sets of parallel pipe fittings are connected on the water box cover pipe fittings of the cold water box, cold water of the cold water connector can flow into the double-channel pipe fittings to the maximum extent, the problem that the pipe fittings of the previous single channel contain too little cold water at one time is avoided, the heat energy of combustion can independently transmit the heat energy into each set of pipe fittings through the double-channel pipe fittings, compared with the single heat energy transmission of the single channel, the problem that the cold water in the single pipe is too much in capacity and is difficult to heat quickly is solved, the tail ends of two pipe fitting pipe heads on the cold water box are connected to the pipe fitting joints of the water box cover, two groups of parallel pipe fittings are arranged on the two groups of pipe fitting joints on the water box cover of the water box, the tail ends of the two groups of pipe fitting pipe heads are inserted into the water box cover provided with the same four groups of pipe fitting joints, the S-shaped water pipe passages are superposed and combined through the S-shaped series connection of the plurality of groups of pipe fittings and the water box cover, the S-shaped water pipe passages prolong the moving retention time of water flow in the heat exchanger, and the pipe fittings are concentrated in the heat exchanger with the inherent volume, so that the pipe fittings can absorb heat energy more effectively, the pipe fittings are strip flat pipe bodies, the long flat pipe fittings have better heating area, the lengths of the plurality of pipe fittings on the heat exchanger are kept consistent, hot water outlet joints are arranged at the water outlets of the two parallel pipe fitting pipe heads, hot water outlet joints are arranged at the hot water outlet ends of the pipe fittings, and hot water is discharged from the hot water outlet joints, the heat conducting fins are arranged on the pipe fitting and are strip plates, the heat conducting fins of the strip plates are more easily sleeved on the pipe fitting and have more open heat absorbing areas, the surfaces of the heat conducting fins are provided with conduit openings which are used for penetrating into the notches of the pipe fitting, the surfaces of the heat conducting fins are provided with a plurality of conduit openings with the same size, the heat conducting fins are provided with corresponding conduit openings according to the number of the pipe fitting preset on the heat exchanger, heat conducting fins are arranged on the edges of the conduit openings, the heat conducting fins on the edges of the conduit openings can be fixedly sleeved on the pipe body of the pipe fitting to form better heat transfer surfaces, the heat conducting fins are four groups of heat conducting fins which are surrounded on the edges of the conduit openings, the peripheries of the heat conducting fins on the edges of the conduit openings are pressed on the pipe fitting body, the heat conducting fins are more easily fixed on the pipe fitting body besides effectively transferring heat energy, heat conducting sealing sheets are arranged on the left side and the right side, and the bottom of the heat conducting sealing sheets on the left side and the right side are inclined sheet surfaces, the heat conducting sealing sheets on a plurality of groups of heat conducting fins which are arranged side by side are close to each other to form a wall surface for blocking heat energy from leaking, the pipe orifices of the heat conducting fins are aligned with the pipe body of the pipe fitting to be sleeved, the plurality of groups of heat conducting fins are sleeved on the pipe fitting side by side to form a latticed heat conducting layer, the heat conducting fins effectively transfer the burning heat energy into the pipe fitting, the traditional single-channel heat exchanger is additionally provided with a spoiler in the middle of the pipe fitting to achieve the aim of uniform water temperature in the pipe, but also becomes the help of scale blockage, the double-channel pipe fitting can furthest increase the inflowing cold water, the water box receives the flowing water, the flowing area in the heat exchanger is increased through an S-shaped water pipe passage, the double-channel pipe fitting turns to make the heat distribution of water more even, and because of the pipe fitting is rectangular shape, make intraductal water be heated more evenly, intraductal spoiler that need not to use makes the rivers piece, make rivers unobstructed, thereby solve the problem that steel heat exchanger heat conductivility is not enough by no longer embroidered, this improve hanging stove thermal efficiency 'S main heat exchange device solves the problem that traditional hanging stove' S heat exchange efficiency is low, be equipped with the two-way pipe fitting that stands side by side in heat exchanger, the direct heat receiving area of pipe fitting has been increased by a wide margin, two pipelines mix many times and turn to make the heat distribution of water more even, have easy to assemble, simple, practical characteristics.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is the overall structure of the wall-hanging stove of the utility model.

Fig. 2 is a schematic top view of the heat exchanger according to the present invention.

Fig. 3 is a schematic diagram of the front structure of the heat exchanger of the present invention.

Fig. 4 is a schematic side view of the heat exchanger of the present invention.

Fig. 5 is a schematic view of the top view structure of the heat-conducting fin of the present invention.

Fig. 6 is a schematic side view of the heat-conducting fin of the present invention.

Fig. 7 is a schematic view of the cover surface structure of the water box of the present invention.

Fig. 8 is a schematic view of the structure of the water box set of the present invention.

Fig. 9 is a schematic view of the pipe structure of the heat exchanger of the present invention.

Fig. 10 is a schematic top view of the heat exchanger according to the present invention.

Fig. 11 is a schematic structural diagram of the heat exchanger of the present invention.

Fig. 12 is a schematic view of the front structure of the heat-conducting fin of the present invention.

In FIG. 1: the device comprises a main machine 1, a cold water inlet interface 2, a hot water outlet interface 3, a gas interface 4, a water pump 5, a high-pressure igniter 6, a gas burner 7, a heat exchanger 8, a fan 9, an air outlet pipe 10 and a gas valve 11.

In FIG. 2: the hot water outlet joint 12, the cold water joint 13, the pipe fitting 14, the heat conducting fin 15, the heat conducting sheet 16, the heat conducting sealing sheet 18 and the water box 19.

In fig. 7: a water box cover 20 and a pipe fitting joint 21.

In fig. 12: a catheter port 17.

Detailed Description

The utility model relates to a main heat exchange device for improving the thermal efficiency of a wall hanging furnace, which comprises a main machine 1, a cold water inlet interface 2, a hot water outlet interface 3, a gas interface 4, a water pump 5, a high-pressure igniter 6, a gas burner 7, a heat exchanger 8, a fan 9, an air outlet pipe 10, a gas valve 11, a hot water outlet joint 12, a cold water joint 13, a pipe fitting 14, a heat conduction fin 15, a heat conduction sheet 16, a conduit port 17, a heat conduction sealing sheet 18, a water box 19, a water box cover 20 and a pipe fitting joint 21, wherein the bottom of the main machine 1 is respectively provided with the cold water inlet interface 2, the hot water outlet interface 3 and the gas interface 4, the wall hanging furnace respectively comprises the cold water inlet interface 2, the hot water outlet interface 3 and the gas interface 4, the cold water is heated by converting heat energy through gas, hot water is discharged from the hot water outlet interface 3, the gas pipe connected with the gas interface 4 penetrates into the main machine 1, the gas pipe is connected to a gas valve 11 inside the host 1, the gas valve 11 controls the gas opening and closing valve of the gas pipe to work, a high-pressure igniter 6 is arranged on the gas valve 11, the gas entering the gas valve 11 after opening the valve is ignited through the high-pressure igniter 6 and enters a gas burner 7 to generate hot combustion, a gas heat pipe on the gas valve 11 is connected to the gas burner 7 at the upper part inside the host 1, the gas burner 7 is responsible for heat energy conversion of the combustion gas and carries out heating treatment on a heat exchanger 8, the upper part of the gas burner 7 is provided with the heat exchanger 8 which heats cold water in the heat exchanger 8 through the hot combustion, the heat exchanger 8 can more effectively increase the heated area and efficiency, a cold water pipe connected with a cold water inlet interface 2 penetrates into the host 1, the cold water pipe is connected to a water pump 5 inside the host 1, and the water pump 5 controls cold water inlet work in the cold water pipe, a cold water pipe on the water pump 5 is connected to a cold water joint 13 of the heat exchanger 8, so that cold water in the water pump 5 flows into the heat exchanger 8, a hot water outlet joint 12 is arranged on the heat exchanger 8, heated hot water is discharged from the hot water outlet joint 12 of the heat exchanger 8, a hot water pipe connected with the hot water outlet joint 3 penetrates into the host 1, the hot water pipe is connected to the hot water outlet joint 12 of the heat exchanger 8 inside the host 1, the hot water outlet joint 12 is connected to the hot water outlet joint 3 on the host 1 through a heat pipe, and then required hot water is output from the hot water outlet joint 3, a fan 9 is arranged on the upper part of the heat exchanger 8, because hot gas and smoke gas generated by the gas burner 7 need to be discharged out of the host 1 through the fan 9, the smoke gas is prevented from accumulating in the host 1, hot heat and short circuit are caused to internal components of the host 1, an air outlet pipe 10 is connected to the fan 9, and the air outlet pipe 10 penetrates out of the top of the host 1, the fan 9 discharges the smoke through the outlet pipe 10, the cold water joint 13 of the heat exchanger 8 is provided with a cold water box 19, the cold water box 19 and a plurality of water boxes 19 are in parallel straight line, the box opening surfaces of the cold water box and the plurality of water boxes 19 are provided with water box covers 20, the water box covers 20 are in a long and flat shape, the water boxes 19 are used for receiving hot water flowing in the pipe fittings 14, two groups of pipe fittings 21 at the upper parts of the water box covers 20 of the water boxes 19 are connected with the pipe fittings 14 for water inlet, two groups of pipe fittings 21 at the lower parts of the water box covers 20 of the water boxes 19 are connected with the pipe fittings 14 for water outlet, the water boxes 19 are arranged in a left-right crossing mode through a plurality of groups, a plurality of groups of pipe fittings are connected onto the water boxes 19 to form an S-shaped water pipe passage, two groups of pipe fittings 21 are arranged at the water box covers 20 of the cold water boxes 19, four groups of pipe fittings 21 are arranged on the water box covers 20 of each group of the water boxes 19, the hot water joint is provided with a hot water box 19, the hot water box 19 and a plurality of water boxes 19 are in parallel straight line, the box opening surfaces of the hot water box and the plurality of water boxes 19 are provided with a water box cover 20, the water box cover 20 of the hot water box 19 is provided with two sets of pipe fittings 21, the cold water box 19 set of the cold water joint 13 and the hot water box 19 set joint head of the hot water joint are staggered, the pipe fittings 21 of the water box cover 20 of the cold water box 19 are connected with two sets of parallel pipe fittings 14, the cold water of the cold water joint 13 can flow into the double-channel pipe fittings 14 to the maximum extent, the problem that the pipe fittings 14 of the previous single channel contain too little cold water once is avoided, the heat energy of combustion can independently transmit the heat energy into each set of pipe fittings 14 through the double-channel pipe fittings 14, compared with the single heat energy transmission, the problem that the cold water in the single channel is too much in volume and is difficult to heat quickly is solved, the tail ends of two pipe fittings 14 on a cold water box 19 are connected to pipe fitting joints 21 of a water box cover 20 of the water box 19, two groups of parallel pipe fittings 14 are arranged on the two remaining pipe fitting joints 21 on the water box cover 20 of the water box 19, the tail ends of the two groups of pipe fittings 14 are inserted into the water box cover 20 provided with the same four groups of pipe fitting joints 21, S-shaped water pipe passages are combined by serially connecting and overlapping S-shaped water pipes 14 and the water box cover 20, the S-shaped water pipe passages prolong the movable retention time of water flow in the heat exchanger 8, and the pipe fittings 14 are concentrated in the heat exchanger 8 with the inherent volume, so that the pipe fittings 14 can absorb heat energy more effectively, the pipe fittings 14 are long and flat pipe bodies, the long and flat pipe fittings 14 have better heating area, the lengths of the pipe fittings 14 on the heat exchanger 8 are kept consistent, hot water outlets 12 are arranged at the pipe fittings 14, the hot water outlet end of the pipe 14 is provided with a hot water outlet joint 12, hot water is discharged from the hot water outlet joint 12, the pipe 14 is provided with a heat conducting fin 15, the heat conducting fin 15 is a strip plate, the heat conducting fin 15 of the strip plate is easier to be sleeved on the pipe 14 and has a more open heat absorption area, the surface of the heat conducting fin 15 is provided with a conduit opening 17, the conduit opening 17 is used for penetrating into a notch of the pipe 14, the surface of the heat conducting fin 15 is provided with a plurality of conduit openings 17 with the same size, the heat conducting fin 15 is provided with corresponding conduit openings 17 according to the number of the pipe 14 preset on the heat exchanger 8, the edge of the conduit opening 17 is provided with a heat conducting fin 16, the heat conducting fin 16 on the edge of the conduit opening 17 can be fixedly sleeved on the pipe body of the pipe 14 to form a better heat transfer surface, the heat conducting fins 16 are four groups surrounding the edge of the conduit opening 17, the periphery of the heat conducting fin 16 on the edge of the conduit opening 17 is pressed on the pipe 14, in addition to effectively transfer heat energy, the heat-conducting fins 15 are more easily fixed on the pipe fittings 14, the heat-conducting sealing sheets 18 are arranged on the left side and the right side of the heat-conducting fins 15, the bottom angles of the heat-conducting sealing sheets 18 on the left side and the right side are outward inclined sheet surfaces, the heat-conducting sealing sheets 18 on a plurality of groups of parallel heat-conducting fins 15 are mutually close in parallel to form a wall surface for blocking heat energy leakage, the pipe openings 17 of the heat-conducting fins 15 are sleeved in the pipe fittings 14 in alignment with the pipe bodies of the pipe fittings 14, the plurality of groups of heat-conducting fins 15 are sleeved in the pipe fittings 14 in parallel to form latticed heat-conducting layers, the heat-conducting fins 15 effectively transfer the burning heat energy into the pipe fittings 14, the traditional single-channel heat exchanger 8 is additionally provided with flow disturbing sheets in the middle of the pipe fittings 14 to achieve the aim of uniform water temperature in the pipe, but also becomes the help of scale blockage, the double-channel pipe fittings 14 can furthest increase the inflow cold water, the water is received by the water box 19, the flow area in the heat exchanger 8 is increased through the S-shaped water pipe passage, the double-channel pipe fitting 14 is bent to enable the heat of water to be distributed more uniformly, the pipe fitting 14 is in a strip shape, so that the water in the pipe is heated more uniformly, no spoiler is needed to be used in the pipe, the water flow sheet is enabled to be smooth, and the problem that the heat conducting performance of the steel heat exchanger 8 is not enough in no-embroidery is solved.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, so as not to limit the protection scope of the present invention, and all equivalent controls or modifications made according to the spirit of the main technical solution of the present invention should be covered in the protection scope of the present invention.

Claims (9)

1. The utility model provides an improve hanging stove heat efficiency's main heat exchange device, it gets into interface (2) to constitute host computer (1) bottom respectively to be equipped with cold water, go out hot water interface (3), gas interface (4), the gas pipe that gas interface (4) are connected penetrates in host computer (1), the gas union coupling is on host computer (1) inside gas valve (11), be equipped with high-pressure ignition ware (6) on gas valve (11), gas heat pipe on gas valve (11) is connected to gas burner (7) on host computer (1) upper portion, the upper portion of gas burner (7) is equipped with and is equipped with heat exchanger (8), the cold water pipe that cold water got into interface (2) and connects penetrates in host computer (1), the cold water pipe is connected to inside water pump (5) of host computer (1), the upper portion of heat exchanger (8) is equipped with fan (9), the connection is equipped with out tuber pipe (10) on fan (9), it wears out outside host computer (1) top to go out tuber pipe (10), its characterized in that: a cold water box (19) is arranged on a cold water joint (13) of the heat exchanger (8), the cold water box (19) and a plurality of water boxes (19) are in a straight line side by side, a water box cover (20) is arranged on the box opening surfaces of the cold water box and the plurality of water boxes (19), the water box cover (20) is in a long strip plate shape, two groups of pipe fittings (21) are arranged on the water box cover (20) of the cold water box (19), four groups of pipe fittings (21) are arranged on the water box cover (20) of each group of water boxes (19), a hot water box (19) is arranged on the hot water joint, the hot water box (19) and the plurality of water boxes (19) are in a straight line side by side, and the water box cover (20) is arranged on the box opening surfaces of the hot water box and the plurality of water boxes (19), two groups of pipe fittings joints (21) are arranged on a water box cover (20) of a hot water box (19), a cold water box (19) group of a cold water joint (13) and the head of the hot water box (19) group of the hot water joint are staggered with each other, two groups of parallel pipe fittings (14) are connected on the pipe fittings joint (21) of the water box cover (20) of the cold water box (19), the tail ends of the pipe fittings (14) on the cold water box (19) are connected to the pipe fittings joint (21) of the water box cover (20) of the water box (19), and two groups of parallel pipe fittings (14) are arranged on the residual two groups of pipe fittings joints (21) on the water box cover (20) of the water box (19) Then the tail ends of the tube heads of the two groups of the pipe fittings (14) are inserted into a water box cover (20) provided with the same four groups of pipe fittings (21), the S-shaped water pipe channel is combined by the S-shaped serial connection and superposition of the plurality of groups of the pipe fittings (14) and the water box cover (20), and a hot water outlet joint (12) is arranged at the water outlet of the tube heads of the two parallel pipe fittings (14).

2. The primary heat exchange device of claim 1, wherein: the pipe fitting (14) is a long and flat pipe body.

3. The primary heat exchange device of claim 1, wherein: the lengths of the plurality of pipe fittings (14) on the heat exchanger (8) are kept consistent.

4. The primary heat exchange device of claim 1, wherein: the heat conduction pipe is characterized in that the pipe (14) is provided with heat conduction fins (15), and a plurality of groups of heat conduction fins (15) are sleeved on the pipe (14) side by side to form a latticed heat conduction layer.

5. The primary heat exchange device of claim 4, wherein: the heat conduction fins (15) are strip plates, and the surfaces of the heat conduction fins (15) are provided with conduit openings (17).

6. The primary heat exchange device of claim 4, wherein: the surface of the heat conducting fin (15) is provided with a plurality of conduit ports (17) with the same size.

7. The primary heat exchange device of claim 5, wherein: the heat conducting fins (16) are arranged on the edges of the conduit opening (17), and the four groups of heat conducting fins (16) surround the edges of the conduit opening (17).

8. The primary heat exchange device of claim 4, wherein: the left side and the right side of the heat conduction fin (15) are provided with heat conduction sealing pieces (18), and a conduit port (17) of the heat conduction fin (15) is aligned with a pipe body of the pipe fitting (14) to be sleeved.

9. The primary heat exchange device of claim 1, wherein: the cold water pipe on the water pump (5) is connected to a cold water joint (13) of the heat exchanger (8), a hot water outlet joint (12) is arranged on the heat exchanger (8), a hot water pipe connected with the hot water outlet joint (3) penetrates into the host (1), and the hot water pipe is connected to the hot water outlet joint (12) of the heat exchanger (8) inside the host (1).

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