CN211716883U

CN211716883U - Novel coaxial air supply and exhaust pipe of wall-mounted gas stove

Info

Publication number: CN211716883U
Application number: CN202020269943.5U
Authority: CN
Inventors: 邱晓宁
Original assignee: Zhongshan Huaning Electric Appliance Co ltd
Current assignee: Zhongshan Huaning Electric Appliance Co ltd
Priority date: 2020-03-07
Filing date: 2020-03-07
Publication date: 2020-10-20
Anticipated expiration: 2030-03-07

Abstract

The utility model discloses a novel coaxial blast pipe that gives of gas hanging stove, including intake pipe and blast pipe, the blast pipe is cup jointed to the intake pipe, it is fixed with the blast pipe connection through the support in the intake pipe, intake pipe and blast pipe all include straight tube section and bend section, the inlet port has been seted up all around to the inlet end pipe wall of intake pipe straight tube section, the exhaust hole has been seted up all around to the exhaust end pipe wall of blast pipe straight tube section, the exhaust hole is located the intake pipe inlet end outside, the part that the blast pipe is located the intake pipe is the bellows, the one end that is close to the inlet port on the intake pipe inner wall is equipped with the. Compared with the prior art, the utility model the advantage lie in: effectively increase heat exchange area, improve convection heat transfer intensity, improve combustor burning temperature, reduce the energy waste.

Description

Novel coaxial air supply and exhaust pipe of wall-mounted gas stove

Technical Field

The utility model relates to a domestic gas instantaneous water heater gives blast pipe technical field, specifically indicates a coaxial blast pipe that gives of novel gas hanging stove.

Background

The domestic gas instantaneous water heater goes through the direct exhaust type, the flue type and the balance type according to the development of the exhaust mode.

Straight-line type: the direct-discharge type household gas instantaneous water heater is not provided with a smoke exhaust pipe, when the water heater operates, air required by combustion is taken from a room, smoke generated after combustion is exhausted into the room, the indoor air environment is polluted, and potential safety hazards exist when ventilation is poor;

flue formula: the flue type household gas instantaneous water heater needs to be provided with a smoke exhaust pipe, when the water heater operates, air required by combustion is taken from the indoor, smoke generated after combustion is exhausted to the outdoor, certain influence is caused on the indoor air environment, and as long as the water heater is installed correctly, no safety problem exists;

balancing: the balance type household gas instantaneous water heater is generally used for supplying and exhausting gas, and the structure is that two pipes are fixed and manufactured in a coaxial mode through a middle support, one pipe is used for exhausting flue gas after combustion, and the other pipe is used for inputting air required by combustion. Also known as coaxial flue tubes. Air required by combustion is taken from the outside during operation, and smoke generated after combustion is discharged to the outside, so that the device is very safe.

The existing balanced type exhaust mode mostly adopts a structure with coaxial inner and outer pipes, and an exhaust pipe in a smoke pipe adopts a straight pipe structure, so that the smoke pipe has some defects, mainly: the inner tube is straight pipe, and heat transfer area has received the restriction, and gaseous velocity of flow is lower relatively for heat transfer coefficient is also relatively, and cold and hot gaseous flow state is laminar flow state, and heat transfer intensity is on the low side.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome above technical defect, provide a heat exchange efficiency height, effectively strengthen the coaxial blast pipe that gives of a novel gas hanging stove of convection velocity.

In order to solve the technical problem, the utility model provides a technical scheme does: the utility model provides a novel coaxial blast pipe that gives of gas hanging stove, includes intake pipe and blast pipe, the intake pipe cup joints the blast pipe, it is fixed with the blast pipe through support and connection in the intake pipe, intake pipe and blast pipe all include straight tube section and bend section, the inlet port has been seted up all around to the inlet end pipe wall of intake pipe straight tube section, the exhaust hole has been seted up all around to the exhaust end pipe wall of blast pipe straight tube section, the exhaust hole is located the intake pipe inlet end outside, the part that the blast pipe is located the intake pipe is the bellows, the one end that is close to the inlet port on the intake pipe inner wall is.

As an improvement, the guide vanes are provided with six groups and are evenly distributed along the circumferential direction of the inner wall of the air inlet pipe.

As an improvement, a sealing rubber ring is sleeved at the joint of the straight pipe section and the bent pipe section of the exhaust pipe.

Compared with the prior art, the utility model the advantage lie in:

1 increases the heat exchange area of the heat exchange. The corrugated pipe enlarges the surface area of the inner pipe wall, increases the heat exchange area of heat exchange, reduces the thermal resistance of convective heat exchange, plays a role in increasing heat transfer, and thus the heat exchange is more sufficient.

2, the strength of convective heat transfer is increased. Under the action of the flow deflectors and the corrugated pipe wall, the gas flows to form turbulent flow and vortex airflow, so that the convection heat transfer effect of cold gas and hot gas is enhanced, and the convection heat transfer strength is increased.

3, the heat transfer coefficient is improved. The diameter of the corrugated pipe is larger than that of the original straight pipe, and the diameter of the outer pipe is not changed. The sectional area of the fresh air flowing through the pipeline is reduced, and the flow speed is increased inevitably due to the fact that the flow of the fresh air in unit time is basically unchanged and the sectional area is reduced, so that the heat transfer coefficient is improved, and the purpose of enhancing heat transfer is achieved.

4, the combustion temperature of the burner is increased. Due to the increase of the heat exchange efficiency of the corrugated pipe, the temperature of the fresh air for combustion supporting entering the combustion chamber is increased, the corresponding combustion temperature is increased, and the larger the temperature gradient is, the better the heat exchange effect is.

Drawings

Fig. 1 is a schematic view of the structure of the coaxial air supply and exhaust pipe of the novel wall-mounted gas boiler of the utility model.

Fig. 2 is the schematic diagram of the internal structure of the novel gas wall-hanging stove coaxial air supply and exhaust pipe.

Fig. 3 is a schematic view of the structure of portion a-a in fig. 1.

Fig. 4 is a schematic view of the portion B-B in fig. 3.

Fig. 5 is a schematic view of a structure of a guide vane.

As shown in the figure: 1. the air inlet pipe comprises an air inlet pipe 2, an air outlet pipe 3, a support 4, an air inlet hole 5, an air outlet hole 6, a rubber sealing ring 7 and a flow deflector.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With reference to fig. 1-5, a novel coaxial supply and exhaust pipe of gas wall hanging stove, including intake pipe 1 and blast pipe 2, intake pipe 1 cup joints blast pipe 2, it is fixed with blast pipe 2 to be connected through support 3 in the intake pipe 1, intake pipe 1 and blast pipe 2 all include straight tube section and bend section, inlet port 4 has been seted up all around to the inlet end pipe wall of intake pipe straight tube section, exhaust hole 5 has been seted up all around to the exhaust end pipe wall of blast pipe straight tube section, exhaust hole 5 is located the intake end outside of intake pipe 1, the part that blast pipe 2 is located intake pipe 1 is the bellows, the one end that is close to inlet port 4 on the 1 inner wall of intake pipe is equipped with water conservancy diversion piece.

One end of the air inlet pipe 1, which is close to the exhaust hole 5, is connected with the exhaust pipe 2 in a sealing manner, six groups of flow deflectors 7 are arranged and evenly distributed along the circumferential direction of the inner wall of the air inlet pipe 1, and a rubber sealing ring 6 is sleeved at the joint of the straight pipe section and the bent pipe section of the exhaust pipe 2.

Tests show that the heat exchange efficiency of the designed coaxial smoke tube is improved by 4% compared with that of the traditional coaxial smoke tube under the same conditions. The beneficial effects of it are:

a user uses a gas wall-mounted boiler (a heating and hot water dual-purpose gas rapid water heater). According to the commonly used 24KW gas wall-mounted boiler in China, the average daily natural gas consumption of a user is 5 cubic meters, if the efficiency is improved by 4%, one family can save about 0.2 cubic meter of gas one day, and one year can save 73 cubic meters of gas one day. According to the calculation of 5000 ten thousand users of the domestic gas wall-hanging stove at present, if the supply and exhaust pipes of the corrugated pipe structure are used completely, the gas can be saved by about 36.5 billion cubic meters in one heating period.

The user uses a gas instantaneous water heater. According to the common 12L gas water heater in China, the consumption of natural gas of a user per day is 3 cubic meters, if the efficiency is improved by 4%, a family can save about 0.12 cubic meter of solar terms per day and 43.8 cubic meters per year, according to the calculation of 1 hundred million users of the common gas water heater in China, if the gas supply and exhaust pipes with the corrugated pipe structure are used completely, the gas consumption can be saved by about 43.8 hundred million cubic meters per year.

According to the calculation of 1 cubic meter of carbon dioxide generated after 1 cubic meter of natural gas is combusted, the emission of 80.3 billion cubic meters of carbon dioxide can be reduced one year, and the environment is effectively protected.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a novel coaxial giving blast pipe of gas hanging stove, includes intake pipe (1) and blast pipe (2), blast pipe (2) are cup jointed in intake pipe (1), be connected fixedly its characterized in that through support (3) in intake pipe (1) and blast pipe (2): intake pipe (1) and blast pipe (2) all include straight tube section and bend section, inlet port (4) have been seted up all around to the inlet end pipe wall of intake pipe straight tube section, exhaust hole (5) have been seted up all around to the exhaust end pipe wall of blast pipe straight tube section, exhaust hole (5) are located intake pipe (1) inlet end outside, the part that blast pipe (2) are located intake pipe (1) is the bellows, the one end that is close to inlet port (4) on intake pipe (1) inner wall is equipped with water conservancy diversion piece (7).

2. The novel coaxial gas supply and exhaust pipe of the wall-mounted gas boiler as claimed in claim 1, characterized in that: and one end of the air inlet pipe (1) close to the exhaust hole (5) is hermetically connected with the exhaust pipe (2).

3. The novel coaxial gas supply and exhaust pipe of the wall-mounted gas boiler as claimed in claim 1, characterized in that: the flow deflectors (7) are provided with six groups and are evenly distributed along the circumferential direction of the inner wall of the air inlet pipe (1).

4. The novel coaxial gas supply and exhaust pipe of the wall-mounted gas boiler as claimed in claim 1, characterized in that: and a rubber sealing ring (6) is sleeved at the joint of the straight pipe section and the bent pipe section of the exhaust pipe (2).