CN202274626U

CN202274626U - Heat exchanger for gas water heater

Info

Publication number: CN202274626U
Application number: CN2011202924260U
Authority: CN
Inventors: 李长江
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-06
Filing date: 2011-08-06
Publication date: 2012-06-13
Anticipated expiration: 2021-08-06

Abstract

The utility model relates to a heat exchanger for a gas water heater, wherein the heat exchanger comprises a combustion chamber, a cavity inner wall, a combustor arranged in the combustion chamber, a gas inlet pipe providing the gas for the combustor, a water inlet pipe, a water outlet pipe and a tube-fin-type heat exchanger arranged above the combustion chamber, wherein the tube-fin-type heat exchanger comprises a fin and a water pipe which penetrates through the fin; the water inlet pipe is connected with one end of the water pipe; the water outlet pipe is connected with the other end of the water pipe; regular bending parts are punched along the length direction or the width direction of the fin of the tube-fin-type heat exchanger; the fin and the cavity inner wall of the tube-fin-type heat exchanger are punched and molded by adopting high-temperature resisting and oxidation-resisting thin metal sheets, such as iron-chromium-aluminum thin sheet alloy materials or nickel-chromium-aluminum thin sheet alloy materials; and a rare earth catalyst lining for reducing the emission of harmful gas components in a hot smoke gas is coated on the fin of the tube-fin-type heat exchanger. By adopting the heat exchanger of the structure, the production cost is low, the service life is long, the safety performance is good, the heat exchange efficiency is high, and the emission of the harmful gas can be reduced effectively.

Description

A kind of gas heater is used heat exchanger

Technical field

The utility model belongs to field of domestic appliances manufacture technology, is specifically related to a kind of gas heater and uses heat exchanger.

Background technology

In the prior art, gas heater adopts copper material or aluminium manufacturing usually with the inwall and the heat exchanger of heat exchanger, because the combustion chamber local temperature is very high; Copper or aluminum material heat resistance are poor, be very easy to produce high-temperature oxydation, if when smoke evacuation system is smooth; Flame squints even can the combustion chamber internal chamber wall be burnt and the initiation fire phenomenon, and security performance is relatively poor, and copper material is more and more rare; World's copper valency rises steadily, and causes the heat exchanger material cost significantly to increase.In addition, the fin of present fin-tube type heat exchanger is generally the plain film structure, because air velocity is level and smooth relatively, turbulent effect is relatively poor, to making heat exchange efficiency lower.Also have, when fuel when combustion chambers burn is insufficient, can produce the discharging of a large amount of CO and NO compound, if room ventilation is relatively poor, be prone to the generation intoxication accident.

The utility model content

The purpose of the utility model is to provide the high gas heater of a kind of heat exchange efficiency to use heat exchanger;

Another purpose of the utility model is to provide that production cost is low, long service life, gas heater that security performance is good are used heat exchanger;

A purpose again of the utility model is to provide a kind of gas heater that can reduce noxious gas emission to use heat exchanger.

The purpose of the utility model is achieved in that a kind of gas heater uses heat exchanger; Comprise the burner (3) that is provided with in combustion chamber (1), cavity wall (2), combustion chamber (1), air inlet pipe (4), water inlet pipe (5), the outlet pipe (6) of combustion gas be provided for burner (3) and be located at the fin-tube type heat exchanger of the top of combustion chamber (1); Comprise fin (7) and be located in the water service pipe (8) on the fin (7); Water inlet pipe (5) is connected with an end of water service pipe (8); Outlet pipe (6) is connected with the other end of water service pipe (8), and the fin of said fin-tube type heat exchanger (7) is at length direction or the well-regulated bending part of width punching press (7.1).

Said bending part (7.1) is "] " shape or ">" shape or ") " shape.

Fin of said fin-tube type heat exchanger (7) and cavity wall (2) adopt the foil alloy material siderochrome aluminium or the punch forming of nickel network aluminium of fire-resistant oxidation resistant.

Be coated with on the fin of said fin-tube type heat exchanger (7) and reduce the rare earth catalyst coating (12) that harmful gas component C0 and NO discharge in the hot flue gas.

The outside of said cavity wall (2) also is provided with cavity outer wall (9), spirals between cavity wall (2) and cavity outer wall (9) in said water inlet pipe (5) middle part, and water inlet pipe (5) is close to and is combined on the cavity wall (2), between cavity wall (2) and cavity outer wall (9), also is filled with thermal insulation layer (10).

Said cavity wall (2) is a corrugated surface.

Said cavity wall (2) is provided with heat exchange lug (11).

Said thermal insulation layer (10) is the glass fibre heat-barrier material.

The good effect of the utility model is: at the length direction or the well-regulated bending part of width punching press of the fin of fin-tube type heat exchanger; Strike out "] such as bending part " shape or ">" shape or ") " shape such as shape; Reduce flow of flue gas speed, increase heat exchanger effectiveness.

The fin of fin-tube type heat exchanger and cavity wall adopt the foil punch forming of fire-resistant oxidation resistant; Like foil alloys material siderochrome aluminium or nickel network aluminium, can tolerate than copper and the higher temperature of aluminium, be difficult for burning; Therefore security performance is higher; Longer service life, and adopt copper material to make relatively, can reduce material cost.

On the fin of fin-tube type heat exchanger, be coated with the rare earth catalyst layer that reduces harmful gas component discharging in the hot flue gas, can reduce discharge of harmful gases such as CO, NO, prevent that the poisonous gas poisoning accident from taking place.

The water inlet pipe that between cavity wall and cavity outer wall, spirals can further improve heat exchange efficiency.

Description of drawings

Fig. 1 is that the gas heater of embodiment one is used the heat converter structure sketch map;

Fig. 2 is a fin cross section partial enlarged drawing;

Fig. 3 is the A portion enlarged drawing of Fig. 1;

Fig. 4 is the vertical view of fin-tube type heat exchanger;

Fig. 5 is that the gas heater of embodiment two is used the heat converter structure sketch map.

The specific embodiment

Below in conjunction with accompanying drawing gas heater is done further explain with the specific embodiment of heat exchanger.

Embodiment one: like Fig. 1, Fig. 2, Fig. 3, shown in Figure 4; The described gas heater of the utility model is used heat exchanger; Mainly by the burner 3 that is provided with in combustion chamber 1, cavity wall 2, the combustion chamber 1, provide air inlet pipe 4, water inlet pipe 5, outlet pipe 6 and the fin-tube type heat exchanger of combustion gas to form for burner 3; Burner 3 can adopt infrared burner or burner etc. greatly, and fin-tube type heat exchanger is located at the top of combustion chamber 1, comprises fin 7 and is located in the water service pipe 8 on the fin 7; Water inlet pipe 5 is connected with an end of water service pipe 8, and outlet pipe 6 is connected with the other end of water service pipe 8.Because burning in the chamber 1 is high-temperature area, can be with the fin 7 of fin-tube type heat exchanger, the foil punch forming that cavity wall 2 adopts fire-resistant oxidation resistant, such as foil alloys material siderochrome aluminium or nickel network aluminium.In order to improve the heat exchanger effectiveness of fin; Length direction or the well-regulated bending part 7.1 of width punching press at the fin of fin-tube type heat exchanger; Strike out "] such as bending part 7.1 " shape or ">" shape or ") " shape such as shape; With the flow of flue gas speed between reasonable regulation and control sheet and the sheet, increase heat exchanger effectiveness.Also can on the fin 7 of fin-tube type heat exchanger, apply rare earth catalyst layer 12; Can reduce gas heater CO and the discharging of NO compound in use greatly; Reach energy-conservation, safety, environmental protection purpose; Rare earth catalyst agent material more application belongs to maturing material in the three-way catalytic apparatus of handling vehicle exhaust, therefore concrete composition no longer details here.In order to increase heat exchange area; Outside at cavity wall 2 also is provided with cavity outer wall 9; Spiral between cavity wall 2 and cavity outer wall 9 in water inlet pipe 5 middle parts, water inlet pipe 5 is close to be combined on the cavity wall 2 and is strengthened heat exchange, in order to reduce heat loss; Between cavity wall 2 and cavity outer wall 9, also be filled with thermal insulation layer 10, can adopt glass fibre heat-barrier material or other heat-barrier material.In addition, in order to increase the heat exchange exchange area of cavity wall 2, can it be stamped into corrugated surface.

Embodiment two: as shown in Figure 4, its agent structure and embodiment one are basic identical, are outside the difference, also heat exchange lug 11 can be set at cavity wall 2, increase exchange capability of heat.

Claims

1. a gas heater is used heat exchanger; Comprise the burner (3) that is provided with in combustion chamber (1), cavity wall (2), combustion chamber (1), air inlet pipe (4), water inlet pipe (5), the outlet pipe (6) of combustion gas be provided for burner (3) and be located at the fin-tube type heat exchanger of the top of combustion chamber (1); Comprise fin (7) and be located in the water service pipe (8) on the fin (7); Water inlet pipe (5) is connected with an end of water service pipe (8); Outlet pipe (6) is connected with the other end of water service pipe (8), it is characterized in that: the fin of said fin-tube type heat exchanger (7) is at length direction or the well-regulated bending part of width punching press (7.1).

2. use heat exchanger according to the said gas heater of claim 1, it is characterized in that: said bending part (7.1) is "] " shape or ">" shape or ") " shape.

3. use heat exchanger according to the said gas heater of claim 1, it is characterized in that: fin of said fin-tube type heat exchanger (7) and cavity wall (2) adopt the foil alloy material siderochrome aluminium or the punch forming of nickel network aluminium of fire-resistant oxidation resistant.

4. use heat exchanger according to claim 1 or 2 or 3 said gas heaters, it is characterized in that: be coated with on the fin of said fin-tube type heat exchanger (7) and reduce the rare earth catalyst coating (12) that harmful gas component CO and NO discharge in the hot flue gas.

5. use heat exchanger according to the said gas heater of claim 1; It is characterized in that: the outside of said cavity wall (2) also is provided with cavity outer wall (9); Spiral between cavity wall (2) and cavity outer wall (9) in said water inlet pipe (5) middle part; Water inlet pipe (5) is close to and is combined on the cavity wall (2), between cavity wall (2) and cavity outer wall (9), also is filled with thermal insulation layer (10).

6. use heat exchanger according to claim 1 or 5 said gas heaters, it is characterized in that: said cavity wall (2) is a corrugated surface.

7. use heat exchanger according to claim 1 or 5 said gas heaters, it is characterized in that: said cavity wall (2) is provided with heat exchange lug (11).

8. use heat exchanger according to the said gas heater of claim 5, it is characterized in that: said thermal insulation layer (10) is the glass fibre heat-barrier material.