CN215176037U

CN215176037U - Condensing type volume water heater

Info

Publication number: CN215176037U
Application number: CN202121556918.6U
Authority: CN
Inventors: 黄学兵; 曾俊辉
Original assignee: Rosen Boiler Co ltd
Current assignee: Rosen Boiler Co ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-12-14
Anticipated expiration: 2031-07-09

Abstract

The utility model relates to the technical field of water heaters, in particular to a condensing type volumetric water heating furnace, which comprises a water storage chamber, a hearth is arranged in the water storage chamber, the side wall of the hearth is communicated with the air inlets of the first return convection pipes, the air outlet of the first return convection pipe is communicated with an upper smoke chamber which is arranged above the water storage chamber, the upper smoke chamber is communicated with the air inlets of a plurality of second return convection pipes, the air outlets of the second return convection pipes are communicated with the lower smoke chamber, the lower smoke chamber is arranged below the water storage chamber, the second return convection pipe is provided with a finned pipe, the lower smoke chamber is provided with a smoke outlet, the structure is added with a heat exchange flow path, the heat in the smoke can be fully utilized, meanwhile, the temperature of the acid gas in the flue gas can be reduced to be lower than the dew point, so that the acid gas is liquefied, the environmental pollution is reduced, and the efficiency is improved.

Description

Condensing type volume water heater

Technical Field

The utility model relates to a water heater technical field especially relates to a condensing volume water heater.

Background

The flue gas generated by the combustion device of the gas water heater has very high temperature, and if the heat is not utilized, great waste is caused. The existing positive displacement gas water heater is provided with a liner for containing water, hot water heated by flames is contained in the liner, a heat exchange flue is arranged in the liner, high-temperature flue gas generated by a combustion device passes through the heat exchange flue, so that the temperature of water in the liner is increased, but a flue gas flow path in the heat exchange flue is shorter, the heat exchange area is smaller, heat exchange can not be fully carried out between flue gas waste heat and the water in the liner, residual smoke discharged from the water heater still has higher temperature, and great corrosion to the discharge flue can be caused while heat is lost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art not enough, and provide a condensing volume water heater, it can not only increase the flue gas flow path and make heat exchange efficiency improve, can also utilize the latent heat of vaporization of flue gas, raises the efficiency, saves the expense, and can reduce the exhaust gas temperature of volumetric water heater by a wide margin to below the flue gas leak source, makes the condensation of acid steam in the flue gas, environmental protection.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a condensing type volume water heater, includes the reservoir chamber, the reservoir chamber is inside to be provided with furnace, the furnace lateral wall communicates with the air inlet of a plurality of first return convection tubes, first return convection tube gas outlet and last smoke chamber intercommunication, go up the smoke chamber set up in the top of reservoir chamber, go up the air inlet intercommunication of smoke chamber and a plurality of second return convection tubes, the gas outlet and the lower smoke chamber intercommunication of second return convection tube, lower smoke chamber set up in the below of reservoir chamber, second return convection tube is provided with the finned tube, the smoke chamber is provided with the exhaust port down.

As a further aspect of this utility model, the finned tube includes a plurality of finned tube units, the finned tube unit includes curved finned tube body and is located a plurality of fin of finned tube body arc inboard.

As a further aspect of this utility model, the arc one end of finned tube body is provided with the recess, and the other end is provided with adjacent the finned tube body recess matched with protruding muscle.

As a further aspect of this utility model, follow the finned tube body radian direction, the fin height reduces after increasing gradually earlier.

As a further aspect of the present invention, the fin surface is provided with a tear groove.

As a further proposal of the utility model, an aluminum plate is arranged between two adjacent finned tube units.

As a further aspect of the utility model, the finned tube is made of a silicon-aluminum alloy.

As a further proposal of the utility model, the top of the upper smoke chamber is provided with a heat insulating layer.

As a further proposal of the utility model, the lower part of the water storage chamber is provided with a water inlet, and the upper part of the water storage chamber is provided with a water outlet.

The utility model has the advantages that: by adopting the structure, fuel is in the hearth and high-temperature flue gas is generated after combustion, the high-temperature flue gas passes through the first return convection pipe to enter the upper smoke chamber after heat exchange, then the flue gas is turned to enter the second return convection pipe to exchange heat again, a flue gas heat exchange flow path is increased, the heat exchange efficiency is improved, the finned tube is arranged inside the second return convection pipe, the finned tube is used for increasing the heating surface of the high-temperature flue gas, the temperature of the high-temperature flue gas in the finned tube is greatly reduced to be below the dew point of the flue gas, acid gas in the flue gas is liquefied and condensed on the finned tube, the hot water furnace absorbs a large amount of sensible heat and latent heat of vaporization of the flue gas, and the efficiency is improved while the environmental pollution is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a top view of the reservoir.

Fig. 4 is a partial cross-sectional view of fig. 2.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is a schematic diagram of another embodiment of fig. 4.

Description of reference numerals:

1-a water storage chamber, 2-a hearth, 3-a first return convection pipe, 4-an upper smoke chamber, 5-a second return convection pipe, 6-a lower smoke chamber, 7-a finned tube, 701-a finned tube unit, 702-a groove, 703-a rib, 704-a fin, 705-a tearing groove, 706-a finned tube body, 8-a smoke outlet, 9-an aluminum plate, 10-a heat insulation layer, 11 water inlets and 12 water outlets.

Detailed Description

The following detailed description of the present invention is provided in connection with the accompanying drawings and the embodiments, and is not intended to limit the scope of the invention.

First embodiment

As shown in fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, an embodiment of the present invention is a condensing type volumetric water heater, including a water storage chamber 1, a hearth 2 is disposed inside the water storage chamber 1, the hearth 2 is vertically disposed, a side wall of the hearth 2 is communicated with gas outlets of a plurality of first return convection pipes 3, preferably, the first return convection pipes 3 are communicated with a lower portion of the hearth 1, so that high temperature flue gas formed after fuel is completely combusted in the hearth 1 enters the first return convection pipes 3, a heat exchange flow path is added, heat exchange with water in the water storage chamber 1 can be sufficiently performed, temperature of the high temperature flue gas is reduced, the gas outlets of the first return convection pipes 3 are communicated with a smoke supply chamber 4, the smoke supply chamber 4 is disposed above the water storage chamber 1, the high temperature flue gas enters the smoke supply chamber 4 from the first return convection pipes 3, go up smoke chamber 4 and the air inlet intercommunication of a plurality of second

return convection tubes

5, 5 gas outlets of second return convection tubes and lower smoke chamber 6 intercommunication, lower smoke chamber 6 set up in the below of reservoir chamber 1, high temperature flue gas follow go up smoke chamber 4 and turn over the entering second return convection tubes 5, then flow in smoke chamber 6 down has further increased the heat transfer flow path of flue gas, second return convection tubes 5 are provided with finned tube 7, and high temperature flue gas is in the finned tube 7 temperature further drops to below the flue gas dew point (when using fuel as the natural gas, the flue gas dew point is about 60 ℃) for acid gas liquefaction, lower smoke chamber 6 is provided with exhaust port 8, the flue gas by exhaust port 8 discharges.

The finned tube 7 comprises a plurality of finned tube units 701 and preferably 3 finned tube units 701, wherein each finned tube unit 701 comprises an arc-shaped finned tube body 706 and a plurality of fins 704 positioned on the arc-shaped inner side of the finned tube body 706.

The arc-shaped end of the finned tube body 706 is provided with a groove 702, the other end of the finned tube body is provided with a convex rib 703 matched with the groove 702 of the adjacent finned tube body 706, and the two adjacent finned tube units 701 are mutually clamped through the groove 702 and the convex rib 703.

Along the radian direction of the finned tube body 706, the heights of the fins 704 are gradually increased and then gradually reduced, the number of the fins 704 is five or seven, the highest fin 704 is located on the central line of the finned tube body 706, the other fins 704 and the central fin 704 are arranged in parallel at intervals and are in a comb-shaped structure, gaps among the fins 704 are spaces where gas flows, the fins 704 extend deep into high-temperature flue gas, the high-temperature flue gas is divided into a plurality of small flow channels, and heat exchange surfaces are increased, so that the gas can be rapidly cooled.

The surface of the fin 704 is provided with a tearing groove 705, the surface of each fin 704 is provided with a plurality of tearing grooves 705, when water or liquid condenses in the process of reducing the temperature of high-temperature gas, the tearing grooves 705 can divide the water or the liquid into small water drops, the surface of the fin 704 is prevented from being completely covered by the water or the liquid, and therefore the heat exchange between the fin 704 and the high-temperature gas is isolated, and the heat exchange efficiency is reduced. In addition, due to the disturbance effect of the tearing grooves 705 on the high-temperature gas on the surface of the fin 704, the thickness of a boundary layer between the high-temperature gas and the surface of the fin 704 can be reduced, and therefore the heat exchange efficiency is improved.

The finned tube 7 is made of silicon-aluminum alloy, the heat transfer coefficient of aluminum is 5 times that of carbon steel, and after the finned tube 7 is added, the heat exchange area is 4-6 times that of the original finned tube, so that the heat exchange coefficient of the heat exchange tube can be greatly improved.

Go up smoke chamber 4 top and be provided with heat insulation layer 10, prevent that high temperature flue gas from carrying out the heat transfer with the outside, reduce product efficiency.

The lower part of the water storage chamber 1 is provided with a water inlet 11, and the upper part of the water storage chamber 1 is provided with a water outlet 12. Cold water gets into from the bottom, flows out from the top, and high temperature flue gas follows furnace 2 comes out to get into first return convection tube 3 temperature is to lower and lower more and more, can exchange most heat, makes water in the reservoir chamber 1 reaches certain temperature, the reservoir chamber 1 lower part constantly has cold water to flow in, the low upper portion height in temperature lower part of water in the reservoir chamber 1, high temperature flue gas follow first return convection tube 3 comes out to turn over again and gets into second return convection tube 5, and high temperature flue gas is in the temperature reduces by a wide margin in second return convection tube 5, and flue gas flow direction is opposite with the rivers direction, for heat transfer against the current, can promote heat exchange efficiency.

In addition, the bottom of furnace 2 can be provided with heat insulation layer 10 to improve the heat exchange efficiency of flue gas, reservoir chamber 1 go up smoke chamber 4 the outer wall of lower smoke chamber 6 all is provided with insulation material, prevents that the heat from running off.

Second embodiment of the invention

As shown in fig. 6, compared with the first embodiment, an aluminum plate 9 is arranged between two adjacent finned tube units 701, and the aluminum plate 9 is longitudinally inserted, preferably three aluminum plates 9 are inserted, and the insertion of the aluminum plates 9 can reduce the flow cross-sectional area of the gas and further increase the heating surface, thereby ensuring the heat exchange efficiency of the heat exchange tube at low flow rate.

By adopting the structure, the condensing type volume water heater has a compact structure, increases a heat exchange flow path while performing secondary heat exchange, can fully utilize heat in flue gas, and can reduce the temperature of acid gas in the flue gas to be below a dew point by adopting the finned tube 7 with the fins 704, so that the acid gas is liquefied, the environmental pollution is reduced, and the efficiency is improved.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A condensing type volume water heater is characterized in that: including reservoir chamber (1), reservoir chamber (1) inside is provided with furnace (2), furnace (2) lateral wall communicates with the air inlet of a plurality of first return convection bank (3), first return convection bank (3) gas outlet and last smoke chamber (4) intercommunication, go up smoke chamber (4) set up in the top of reservoir chamber (1), go up the air inlet intercommunication of smoke chamber (4) and a plurality of second return convection bank (5), the gas outlet and lower smoke chamber (6) intercommunication of second return convection bank (5), lower smoke chamber (6) set up in the below of reservoir chamber (1), second return convection bank (5) are provided with finned tube (7), lower smoke chamber (6) are provided with exhaust port (8).

2. A condensing volumetric water heater according to claim 1, characterized in that: the finned tube (7) comprises a plurality of finned tube units (701), and each finned tube unit (701) comprises an arc-shaped finned tube body (706) and a plurality of fins (704) located on the arc-shaped inner side of the finned tube body (706).

3. A condensing volumetric water heater according to claim 2, characterized in that: the arc-shaped end of the finned tube body (706) is provided with a groove (702), and the other end of the finned tube body is provided with a convex rib (703) matched with the groove (702) of the adjacent finned tube body (706).

4. A condensing volumetric water heater according to claim 2, characterized in that: along the radian direction of the finned tube body (706), the height of the fin (704) is gradually increased and then gradually reduced.

5. A condensing volumetric water heater according to claim 2, characterized in that: the surface of the fin (704) is provided with a tearing groove (705).

6. A condensing volumetric water heater according to claim 2, characterized in that: an aluminum plate (9) is arranged between every two adjacent finned tube units (701).

7. A condensing volumetric water heater according to claim 1, characterized in that: the finned tube (7) is made of silicon-aluminum alloy.

8. A condensing volumetric water heater according to claim 1, characterized in that: and a heat insulating layer (10) is arranged at the top of the upper smoke chamber (4).

9. A condensing volumetric water heater according to claim 1, characterized in that: the water storage device is characterized in that a water inlet (11) is formed in the lower portion of the water storage chamber (1), and a water outlet (12) is formed in the upper portion of the water storage chamber (1).