CN215571191U - Air-cooled gas water heater - Google Patents

Abstract

The utility model discloses an air-cooled gas water heater, comprising: a burner for burning a gas; the combustion chamber is provided with an air interlayer on the side wall, an air outlet part is formed at the top of the air interlayer, and an air inlet part for introducing air into the air interlayer is further arranged on the side wall of the combustion chamber; the exhaust fume collecting hood is internally provided with a fan; wherein, the combustor is arranged the bottom of combustion chamber, the collection petticoat pipe sets up the top of combustion chamber, the air interlayer passes through air-out portion intercommunication the collection petticoat pipe. The heat dissipation efficiency of the gas water heater is improved so as to improve the user experience.

Description

Air-cooled gas water heater

Technical Field

The utility model belongs to the technical field of household appliances, and particularly relates to an air-cooled gas water heater.

Background

At present, a water heater is a household appliance commonly used in daily life. The water heater is classified into a gas water heater, an electric water heater and the like, wherein the gas water heater is widely used due to the convenience in use. A conventional gas water heater generally includes a burner, a combustion chamber, a heat exchanger, and a smoke collecting hood, and the like, in which the burner burns gas to heat water flowing through the heat exchanger, and the smoke is discharged to the outside of a room by a fan in the smoke collecting hood.

In the conventional technology, a combustion chamber in a gas water heater is usually made of sheet metal parts, and a water-cooling heat exchange pipe is adopted for cooling. However, in the actual use process, the heat exchange tube is corroded due to the influence of water quality, and meanwhile, after cold water enters the heat exchange tube, condensed water is easily generated on the surface of the combustion chamber, so that the corrosion of the combustion chamber is further caused, and the service life and the use reliability of the gas water heater are reduced.

In view of this, how to design a water heater technology with high use reliability is a technical problem to be solved by the utility model.

SUMMERY OF THE UTILITY MODEL

The utility model provides an air-cooled gas water heater, which improves the heat dissipation efficiency of the gas water heater so as to improve the user experience.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

in one aspect, the present invention provides an air-cooled gas water heater comprising:

a burner for burning a gas;

the combustion chamber is provided with an air interlayer on the side wall, an air outlet part is formed at the top of the air interlayer, and an air inlet part for introducing air into the air interlayer is further arranged on the side wall of the combustion chamber;

the exhaust fume collecting hood is internally provided with a fan;

wherein, the combustor is arranged the bottom of combustion chamber, the collection petticoat pipe sets up the top of combustion chamber, the air interlayer passes through air-out portion intercommunication the collection petticoat pipe.

Set up the air intermediate layer through the lateral wall at the combustion chamber, utilize the air intermediate layer to block the combustor high temperature that the combustion gas produced in the combustion chamber outwards conducts heat, meanwhile, the combustion chamber lateral wall is provided with the air inlet portion, air interlayer's top forms air-out portion, under the effect of fan, the outside air of combustion chamber enters into the air intermediate layer via the air inlet portion, utilize outside cold air to cool down the lateral wall of combustion chamber and dispel the heat, and the cold air absorbs the heat and then enters into the smoke collecting hood from the air-out portion and discharges to the outside with the flue gas that the combustor burning produced together, utilize the radiating mode of air-cooled heat can effectually solve the condition emergence of water-cooling heat exchange tube air-out pipeline corruption like this, and simultaneously, the condition emergence of comdenstion water that has appeared by utilizing the water heat dissipation has also been avoided, realize improving gas heater's radiating efficiency in order to improve user experience nature.

In an embodiment of the present application, the top of the air interlayer is obliquely arranged toward the fume collecting hood.

Set up to the slope of orientation collection petticoat pipe through the top with air interlayer and arrange, can effectual guide air current flow towards collection petticoat pipe direction to improve the smooth and easy degree of flow of air current, and satisfy top collection petticoat pipe erection dimension's requirement.

In an embodiment of the present application, the burner is spaced from a sidewall of the combustion chamber.

The interval is formed between the combustor and the inner wall of the combustion chamber, so that the direct burning of flame to the side wall of the combustion chamber is reduced, and the heat transfer generated outwards by the combustion chamber is further reduced.

In this application embodiment, the lateral wall bottom of combustion chamber is provided with the inside-out flange, the inside-out flange is used for installing around forming the installing zone of combustor, the combustor sets up on the inside-out flange, still be provided with on the inside-out flange be used for to the supplementary vent of interval regional air supply.

Through the auxiliary ventilation opening that the lateral wall bottom of combustion chamber formed, realize that the outside air gets into along the combustion chamber inner wall, can more be favorable to playing thermal-insulated effect on the one hand, on the other hand more is favorable to the gas of combustor output to obtain abundant burning.

In an embodiment of the application, the combustor includes casing and a plurality of fire row, the fire row sets up in the casing, the top edge of casing is provided with the flanging, the flanging sets up on the lateral wall of combustion chamber, still be provided with on the flanging be used for to the supplementary vent of interval regional air supply.

Set up the auxiliary vent through the edge that turns up at the combustor, utilize the auxiliary vent to realize that the outside air gets into along the combustor inner wall, can more be favorable to playing thermal-insulated effect on the one hand, on the other hand more is favorable to the gas of combustor output to obtain abundant burning.

In an embodiment of the present application, the air interlayer includes a first sub-air interlayer and a second sub-air interlayer in sequence from inside to outside.

Through setting up multilayer air intermediate layer, utilize the thermal-insulated effect that multilayer space intermediate layer produced, the outside transmission of heat that blocks the combustion chamber that can be better improves heat-proof quality.

In an embodiment of the present application, the side wall of the combustion chamber includes a first inner wall plate, a second inner wall plate and an outer wall plate, the second inner wall plate is located between the first inner wall plate and the outer wall plate, the first sub-air interlayer is formed between the first inner wall plate and the second inner wall plate, the second sub-air interlayer is formed between the second inner wall plate and the outer wall plate, the outer wall plate is provided with a plurality of first vent holes and a plurality of second vent holes, the first vent holes are communicated with the first sub-air interlayer, and the second vent holes are communicated with the second sub-air interlayer; wherein the first ventilation hole and the second ventilation hole are the air inlet portion.

Through set up the ventilation hole on the wainscot, the ventilation hole of different positions will satisfy different sub-air sandwich's air inlet requirement, and then plays better heat dissipation and thermal-insulated effect through multilayer sub-air sandwich.

In an embodiment of the present application, the first vent hole is distributed below the second vent hole.

In an embodiment of the application, the bottom of the second inner wall plate is provided with a bending part, and the bending part is located above the first vent hole and is abutted against the inner wall of the outer wall plate.

In an embodiment of the present application, a thickness of the first sub air interlayer is smaller than a thickness of the second sub air interlayer.

The heat dissipation airflow can be rapidly heated through the first sub-air interlayer with small thickness, so that rapid heat dissipation is realized; and the thicker second sub-air interlayer at the outer side can better play a role of air heat insulation so as to improve the heat insulation performance of the combustion chamber.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of an air-cooled gas water heater according to an embodiment of the present invention;

FIG. 2 is a schematic view of a partial structure of an air-cooled gas water heater according to an embodiment of the present invention;

FIG. 3 is an assembled view of the burner, combustion chamber, heat exchanger and smoke collection cage of an embodiment of the air-cooled gas water heater of the present invention;

FIG. 4 is a cross-sectional view of the assembled structure of FIG. 3;

FIG. 5 is an enlarged view of a portion of area A of FIG. 4;

FIG. 6 is a schematic view of a side wall of the combustion chamber of an air-cooled gas water heater according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view of the sidewall of FIG. 6;

FIG. 8 is a schematic view of a heat exchanger according to an embodiment of the air-cooled gas water heater of the present invention.

Description of reference numerals:

a housing 1;

a burner 2;

a shell 21 and a fire grate 22;

a heat exchanger 3;

the heat exchange tube 31, the end plate 32 and the fins 33;

a combustion chamber 4;

a first inner wall plate 41, a second inner wall plate 42, an outer wall plate 43, a mounting plate 40;

a bending part 421, a first vent hole 431, a second vent hole 432, an inner flange 433, and an auxiliary vent hole 434;

a smoke collecting hood 5;

a fan 51;

an air interlayer 400;

a first sub air interlayer 401 and a second sub air interlayer 402.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The gas water heater adopts gas as a main energy material, and high-temperature heat generated by gas combustion is transferred to cold water flowing through a heat exchanger so as to achieve the purpose of preparing hot water.

Gas water heaters typically include a housing, and a burner, a heat exchanger, a fan, and a smoke collection hood, among other components, disposed within the housing.

Wherein, the gas is carried to combustor department, ignites the gas through ignition to make the combustor burn to the gas of carrying, and then produce the heat.

A heat exchange tube is arranged in the heat exchanger, one end of the heat exchange tube is communicated with a water supply pipeline, and the other end of the heat exchange tube is communicated with a shower head or a water faucet and the like.

The heat generated by the combustion of the gas by the burner is used for heating the heat exchange pipe, so that the water temperature in the heat exchange pipe is increased to form hot water.

When the gas water heater works, cold water provided by the water supply pipeline flows into the heat exchange pipe, is heated into hot water by the heating source generated by the burner, and then flows out from the shower head or the water faucet through the hot water valve for users to use.

Meanwhile, when the gas water heater works, the fan is electrified and runs simultaneously, and smoke generated by the combustor is discharged outdoors under the action of the fan.

First embodiment, as shown in fig. 1 to 7, the present embodiment provides a gas water heater, at least including: the burner comprises a shell 1, a burner 2, a heat exchanger 3, a combustion chamber 4 and a smoke collection hood 5.

The burner 2 is disposed at the bottom of the combustion chamber 4, the heat exchanger 3 is disposed at the upper portion of the combustion chamber 4, and the smoke collecting hood 5 is disposed at the top of the combustion chamber 4 such that the heat exchanger 3 is disposed between the combustion chamber 4 and the smoke collecting hood 5.

A fan 51 is arranged in the fume collecting hood 5, and external air enters the combustion chamber 4 by the fan 51; the burner 2, the heat exchanger 3, the combustion chamber 4 and the smoke collecting hood 5 are assembled together and collectively installed in the casing 1.

In actual use, heat generated by the combustion of the gas during operation of the burner 2 is conducted to the housing 1 in order to reduce the heat transfer.

In the conventional technology, a water-cooled heat exchange pipe is generally arranged outside the combustion chamber 3, the water-cooled heat exchange pipe is used as a part of a heat exchanger, and cold water flows into the water-cooled heat exchange pipe to absorb heat emitted by the combustion chamber 3 and then enters the heat exchanger for heating.

However, the water-cooled heat exchange pipe is affected by water quality and can generate condensed water, which can cause severe corrosion of the gas water heater.

This application is in order to satisfy 4 normal heat dissipation requirements of combustion chamber, when solving the problem of gas heater corrosion.

The side wall of the combustion chamber 4 is provided with an air interlayer 400, the top of the air interlayer 400 forms an air outlet part, the side wall of the combustion chamber 4 is also provided with an air inlet part for air inlet to the air interlayer 400, and the air interlayer 400 is communicated with the smoke collecting hood 5 through the air outlet part;

in the actual use process, after the gas is delivered to the combustor 2 to be ignited and combusted, the gas is combusted in the combustion chamber 4, and the generated high-temperature flue gas rises to heat the water flowing in the top heat exchanger 3.

Meanwhile, the fan 51 in the fume collecting hood 5 is powered on, and negative pressure is formed in the fume collecting hood 5 under the action of the fan 51, so that high-temperature fume generated in the combustion chamber 4 flows into the fume collecting hood 5 and is finally discharged to the outside.

And, because the fume collecting hood 5 forms negative pressure at the top of the combustion chamber 4, air outside the combustion chamber 4 will enter the air interlayer 400 from the outside of the combustion chamber 4 through the air inlet portion under the action of the negative pressure.

The air flow in the air interlayer 400 can rapidly take away the heat transferred from the side wall of the combustion chamber 4 to the outside, and the air flow in the air interlayer 400 is heated and then conveyed into the smoke collecting hood 5 from the air outlet part at the top, and is discharged to the outside along with the high-temperature smoke by the fan 51.

Through increasing air interlayer 400 to the realization utilizes external cold air to carry out the heat absorption cooling to the lateral wall of combustion chamber 4, and then need not to adopt the water-cooling heat exchange tube, when satisfying the heat dissipation requirement of combustion chamber 4, can effectual reduction because of the phenomenon of water-cooling heat dissipation appearance corrosion, and then improve gas heater's use reliability.

In some embodiments, the combustion chamber 4 is generally rectangular or directional in cross-section, and correspondingly, the combustion chamber 4 is configured with four sidewalls. For heat dissipation of the combustion chamber 4, an air interlayer 400 is formed on at least one side wall.

For example: an air interlayer 400 may be disposed in the front side wall of the combustion chamber 4, and since the outside of the front side wall of the combustion chamber 4 is the front panel of the housing 1, the front panel is usually configured with operation keys, and a user needs to adjust the gas water heater by operating the operation keys on the front panel.

And the air interlayer 400 is formed in the front sidewall of the combustion chamber 4, and the air interlayer 400 in the front sidewall dissipates heat using cool air to reduce the heat transfer from the combustion chamber 4 to the front panel of the casing 1.

For example: air interlayers 400 may be provided at both side walls of the combustion chamber 4, and since both sides of the casing 1 are exposed indoors, a user easily touches the side portions of the casing 1.

And the air interlayer 400 is formed in the side walls of the combustion chamber 4, and the air interlayer 400 in the side walls dissipates heat using cool air to reduce the heat transfer of the combustion chamber 4 to the both side portions of the casing 1.

Preferably, the air interlayers 400 are disposed in the four sidewalls of the combustion chamber 4, and during the operation of the burner 2, the four sidewalls of the combustion chamber 4 are respectively cooled by the respective air interlayers 400, so as to reduce the heat transfer to the housing 1 to the maximum extent, thereby effectively improving the user experience.

In some embodiments, in order to guide the high-temperature flue gas and the heat dissipation airflow into the smoke collecting hood 5 smoothly, the top of the air interlayer 400 may be arranged obliquely toward the smoke collecting hood 5 for the combustion chamber 4.

Specifically, during use, a negative pressure is formed in the smoke collecting hood 5 under the action of the fan 51, and under the action of the negative pressure, on one hand, high-temperature smoke in the combustion chamber 4 flows upwards to the dust collecting hood, and on the other hand, heat dissipation airflow of the air interlayer 400 in the side wall of the combustion chamber 4 also flows upwards to the dust collecting hood.

And because the top of the combustion chamber 4 forms a contraction opening structure, the airflow can intensively and quickly enter the dust hood, thereby improving the discharge efficiency of hot air and being more beneficial to improving the heat release in the combustion chamber 4.

In some embodiments, the number of air interlayers 400 formed on the side wall of the combustion chamber 4 may be provided in multiple layers, so that better heat insulation can be achieved by the heat insulation effect of the multiple air interlayers 400 through the air insulation effect.

The air interlayer 400 is illustrated as being configured in two layers.

The air interlayer 400 includes a first sub air interlayer 401 and a second sub air interlayer 402 in this order from the inside.

Specifically, the first sub-air interlayer 401 is located inside the second sub-air interlayer 402, and during the operation of the burner 2, the air in the first sub-air interlayer 401 is heated rapidly, and meanwhile, the heat dissipation airflow in the first sub-air interlayer 401 flows rapidly to the top fume collecting hood 5, so as to achieve a large amount of heat dissipated upwards from the combustion chamber 4.

For the second sub-air interlayer 402 outside the first sub-air interlayer 401, the second sub-air interlayer 402 will serve as a second thermal insulation, and the heat dissipation airflow in the second sub-air interlayer 402 will further take away the heat conducted out from the first sub-air interlayer 401, so that the outward conduction of the heat in the combustion chamber 4 can be minimized, and the thermal insulation performance can be improved.

In one embodiment, there are various ways to form the air jacket 400 for the sidewall of the combustion chamber 4, as will be illustrated below.

The side wall of the combustion chamber 4 comprises a first inner wall plate 41, a second inner wall plate 42 and an outer wall plate 43, wherein the second inner wall plate 42 is positioned between the first inner wall plate 41 and the outer wall plate 43, a first sub-air interlayer 401 is formed between the first inner wall plate 41 and the second inner wall plate 42, a second sub-air interlayer 402 is formed between the second inner wall plate 42 and the outer wall plate 43, a plurality of first vent holes 431 and a plurality of second vent holes 432 are arranged on the outer wall plate 43, the first vent holes 431 are communicated with the first sub-air interlayer 401, and the second vent holes 432 are communicated with the second sub-air interlayer 402; wherein the first and second vent holes 431 and 432 are the air inlet portions.

Specifically, the combustion chamber 4 is made of a plate material, wherein a three-layer plate material structure is used to form the first sub air layer 401 and the second sub air layer 402.

A first sub-air interlayer 401 is formed between the two inner-side plates, and the line end of the first inner wall plate 41 extends to the bottom of the outer wall plate 43, so that the second vent hole arranged at the bottom of the outer wall plate 43 meets the requirement of air intake to the first sub-air interlayer 401.

A second sub-air layer 402 is formed between the second inner wall plate 42 and the outer wall plate 43, and the second ventilation holes 432 meet the requirement of air intake to the second sub-air layer 402.

And the upper end portions of the first inner wall panel 41, the second inner wall panel 42 and the outer wall panel 43 are formed in a structure inclined or bent toward the inside to realize a throat structure of the ceiling of the combustion chamber 4.

In addition, in order to form the relatively closed air flow passage by the first sub-air sandwich 401 and the second sub-air sandwich 402, the first inner wall panel 41 and the second inner wall panel 42 are respectively formed with a flange at both sides, and the flange of the second inner wall panel 42 abuts against the outer wall panel 43 to form the second sub-air sandwich 402.

And the first inner wall panel 41 covers the second inner wall panel 42 as a whole to form the first sub-air sandwich 401 at the inner side of the second sub-air sandwich 402.

And in order to meet the air intake requirement of the two sub-air interlayers, the first vent holes 431 are distributed below the second vent holes 432.

Specifically, since the second sub-air interlayer 402 is directly formed between the second inner wall plate 42 and the outer wall plate 43, the second sub-air interlayer 402 has more second ventilation holes 432 to realize air intake.

And the first sub air sandwich 401 is located inside the second sub air sandwich 402, an upper region of the first sub air sandwich 401 is formed by the cooperation between the first inner wall plate 41 and the second inner wall plate 42, and a lower region of the first sub air sandwich 401 is formed by the cooperation between the first inner wall plate 41 and the outer wall plate 43.

Therefore, the first ventilation holes 431 are distributed below the second ventilation holes 432, and the air intake requirement of the first sub-air interlayer 401 can be met.

Meanwhile, a bent portion 421 may be further provided at the bottom of the second inner wall panel 42, and the bent portion 421 is positioned above the first vent hole 431 and abuts against the inner wall of the outer wall panel 43.

Specifically, the bending portion 421 is disposed at the bottom of the second inner wall panel 42, and the second sub-air interlayer 402 can be separated from the first sub-air interlayer 401 at the bottom by the bending portion 421, so as to avoid the mutual influence of the air intake of the two sub-air interlayers.

In one embodiment, the thicknesses of the sub-air interlayers may be sequentially reduced from inside to outside, for example: the thickness of the first sub air sandwich 401 is smaller than that of the second sub air sandwich 402.

Specifically, the first sub air interlayer 401 near the flame of the combustion chamber 4 is seriously affected by the heating of the flame, and the first sub air interlayer 401 with smaller thickness can quickly heat the radiating airflow and can be quickly discharged into the smoke collecting hood 5 under the action of negative pressure and hot air rising.

And the thickness of the second outer sub-air interlayer 402 is thicker, so that the second outer sub-air interlayer can better play a role in air heat insulation, and the heat insulation performance of the combustion chamber 4 is improved.

In certain embodiments, the burner 2 forms a space with the side wall of the combustion chamber 4.

Specifically, because the top of the combustion chamber 4 forms a contraction opening structure, the flame generated in the combustion process of the combustor 2 is correspondingly gathered towards the middle part.

And as the air flow flows to the smoke collecting hood 5 in the middle, the flame can be gathered in the middle area of the combustion chamber 4 for combustion, so that the high-temperature smoke can rapidly flow from the middle position to the smoke collecting hood 5 directly upwards.

In a preferred embodiment, in order to form a heat dissipation airflow flowing along the inner side of the inner wall of the combustion chamber 4, an inner flange 433 is disposed at the bottom of the outer wall 43, the inner flange 433 surrounds a mounting area for mounting the burner 2, the burner 2 is disposed on the inner flange 433, and an auxiliary vent 434 for blowing air to the spaced area is further disposed on the inner flange 433.

Specifically, the auxiliary vent 434 is located inside the first inner wall panel 41, and air sucked through the auxiliary vent 434 flows along the surface of the first inner wall panel 41.

In the actual use process, under the action of the negative pressure at the top inside the combustion chamber 4, part of the airflow enters the combustor 2 to participate in the combustion of the fuel gas, part of the airflow enters the air interlayer 400 through the side wall of the combustion chamber 4, and part of the airflow enters the combustion chamber 4 from the auxiliary ventilation opening 434 attached to the inner wall of the combustion chamber 4, so that the radiating airflow flowing attached to the inner wall can be formed in the combustion chamber 4, and a better heat insulation effect is achieved.

In addition, because the heat dissipation airflow flowing along the inner wall is formed at the periphery of the flame of the burner 2, the heat dissipation airflow forms an air curtain to assist the flame generated by the burner 2 to burn more fully, so as to improve the heating efficiency.

Alternatively, in some embodiments, the burner 2 generally comprises a casing 21 and a plurality of fire rows 22, the fire rows 22 being arranged in the casing 21, the upper edge of the casing 21 being provided with a flanging 211 arranged on the side wall of the combustion chamber 4, said flanging being also provided with auxiliary vents for blowing air into said spacing zones.

The air interlayer is arranged on the side wall of the combustion chamber, so that the high-temperature heat transfer outwards generated by the combustion of the gas in the combustion chamber by the combustor is blocked by the air interlayer. Meanwhile, the side wall of the combustion chamber is provided with an air inlet part, an air outlet part is formed at the top of the air interlayer, air outside the combustion chamber enters the air interlayer through the air inlet part under the action of the fan, and the side wall of the combustion chamber is cooled and radiated by using outside cold air.

And the cold air absorbs heat and then enters the smoke collecting hood from the air outlet part and is discharged to the outside along with the smoke generated by the combustion of the burner, so that the corrosion of the air outlet pipeline of the water-cooling heat exchange tube can be effectively avoided by using an air-cooling heat dissipation mode, meanwhile, the occurrence of the condensate water due to the heat dissipation of water is also avoided, and the improvement of the heat dissipation efficiency of the gas water heater is realized to improve the user experience.

Second embodiment, as shown in fig. 1 to 8, according to the first embodiment, since the heat exchanger is disposed at the upper portion of the combustion chamber 4 and between the combustion chamber 4 and the smoke collecting hood 5, in order to achieve the integrated installation of the components, the overall height is reduced.

For the combustion chamber 4, its upper part is provided with oppositely arranged mounting plates 40, the mounting plates 40 extending upwards;

the heat exchanger comprises a heat exchange tube 31 and two end plates 32, wherein the two end plates 32 are oppositely arranged, and the heat exchange tube 31 is arranged on the two end plates 32;

wherein, the heat exchanger sets up in the upper portion of combustion chamber 4, and end plate 32 sets up between two mounting panels 40, and end plate 32 and mounting panel 40 form enclose the frame structure, and smoke collecting cover 5 sets up enclose the top of frame structure.

Specifically, the heat exchange pipe 31 is required to heat water flowing inside by absorbing heat generated by combustion of gas by the burner 2 during use. Therefore, the heat exchange pipe 31 needs to exchange heat with high-temperature flue gas generated by combustion of the burner 2 in a relatively closed area around in the heat exchange process.

In the conventional art, the heat exchanging pipe 31 is usually installed by using an enclosure frame, and high-temperature flue gas generated by combustion of the burner 2 flows into an area enclosed by the enclosure frame to heat the heat exchanging pipe 31. The enclosure, which needs to be arranged between the combustion chamber 4 and the fume collecting hood 5, entails an increase in the height dimension.

To this end, the present application employs two oppositely disposed mounting plates 40 disposed at the top of the combustion chamber 4 for mounting the heat exchanger. And for the heat exchanger, two oppositely arranged tube plates are adopted to support and mount the heat exchanger.

After the heat exchanger is assembled at the top of the combustion chamber 4, the two tube plates are clamped between the two mounting plates 40, and then the two tube plates and the two mounting plates 40 are matched to form an area for heat exchange between the heat exchange tube 31 and high-temperature flue gas.

Since the heat exchanger is installed by using the height of the side wall of the combustion chamber 4, the overall height of the assembled components inside the casing 1 can be effectively reduced. And the heat exchanger and the combustion chamber 4 are integrated, so that a compact design is realized.

In some embodiments, in order to improve the heating efficiency of water, the heat exchange pipe 31 has a winding structure, and the bent portion of the heat exchange pipe 31 is located outside the end plate 32.

In other embodiments, in order to improve the heat exchange performance, the heat exchanger further comprises a plurality of fins 33, wherein the fins 33 are arranged on the heat exchange tube 31, and the fins 33 are positioned between the two end plates 32.

Specifically, the fins 33 can be connected to the heat exchange tube 31 in a conventional tube expansion manner and the like, and the heat exchange area of the heat exchange tube 31 can be effectively increased by using the fins 33, so that the heat exchange efficiency is improved.

Wherein, as for the fins 33, the length of the fins 33 is smaller than the length of the end plate 32. Thus, it is possible to prevent the fins 33 from interfering with the mounting plates 40 on both sides after the heat exchanger is mounted in the space formed between the two mounting plates 40, thereby improving the assembling reliability.

In some embodiments, to improve assembly accuracy and efficiency, the two ends of the mounting plate 40 are respectively provided with positioning plates (not labeled) bent toward the inside, against which the edges of the end plates 32 abut.

Specifically, during assembly, the positioning plates formed at the two ends of the mounting plate 40 can position the end plate 32, so that the heat exchanger is integrally limited by the positioning of the mounting plate 40. And, the operator can assemble the end plate 32 along the positioning plate in a guiding manner to improve the assembling efficiency and accuracy.

Further, in order to improve the connection reliability, the lower portion of the end plate 32 is screwed to the side wall of the combustion chamber 4, and the end plate 32 is screwed to the side wall of the smoke collecting hood 5.

Specifically, after the heat exchanger is positioned between the two mounting plates 40, the bottom of the end plate 32 is fixed to the upper edge of the combustion chamber 4 through screw connection, and similarly, the top of the end plate 32 is fixed to the edge of the smoke collection hood 5 through screw connection, so that the combustion chamber 4, the heat exchanger and the smoke collection hood 5 are firmly connected and fixed together.

In another embodiment, in order to reduce the occurrence of smoke leakage from the connection between the fume collecting hood 5 and the combustion chamber 4, the mounting plate 40 is extended into the fume collecting hood 5 so that the upper edges of both the end plate 32 and the mounting plate 40 form an overlapping region with the side wall of the fume collecting hood 5 to improve the sealing connection performance; meanwhile, the joint between the mounting plate 40 and the end plate 32 can be effectively shielded and sealed by the positioning plate.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. An air-cooled gas water heater, comprising:

a burner for burning a gas;

the combustion chamber is provided with an air interlayer on the side wall, an air outlet part is formed at the top of the air interlayer, and an air inlet part for introducing air into the air interlayer is further arranged on the side wall of the combustion chamber;

the exhaust fume collecting hood is internally provided with a fan;

wherein, the combustor is arranged the bottom of combustion chamber, the collection petticoat pipe sets up the top of combustion chamber, the air interlayer passes through air-out portion intercommunication the collection petticoat pipe.

2. The air-cooled gas water heater according to claim 1, wherein a top portion of the air interlayer is arranged obliquely toward the hood.

3. The air-cooled gas water heater of claim 2, wherein the burner is spaced from a side wall of the combustion chamber.

4. The air-cooled gas water heater according to claim 3, characterized in that the bottom of the side wall of the combustion chamber is provided with an inner flange, the inner flange surrounds and forms a mounting area for mounting the burner, the burner is arranged on the inner flange, and the inner flange is further provided with an auxiliary ventilation opening for supplying air to the interval area.

5. An air-cooled gas water heater according to claim 3, wherein the burner includes a housing and a plurality of grates, the grates being disposed in the housing, an upper edge of the housing being provided with a flange, the flange being provided on a side wall of the combustion chamber, the flange being further provided with an auxiliary vent for blowing air to the spaced area.

6. The air-cooled gas water heater of claim 2, wherein the air interlayer comprises a first sub air interlayer and a second sub air interlayer in sequence from inside to outside.

7. The air-cooled gas water heater according to claim 6, wherein the side wall of the combustion chamber comprises a first inner wall plate, a second inner wall plate and an outer wall plate, the second inner wall plate is positioned between the first inner wall plate and the outer wall plate, the first sub-air interlayer is formed between the first inner wall plate and the second inner wall plate, the second sub-air interlayer is formed between the second inner wall plate and the outer wall plate, a plurality of first vent holes and a plurality of second vent holes are formed in the outer wall plate, the first vent holes are communicated with the first sub-air interlayer, and the second vent holes are communicated with the second sub-air interlayer; wherein the first ventilation hole and the second ventilation hole are the air inlet portion.

8. The air-cooled gas water heater of claim 7, wherein the first vent is distributed below the second vent.

9. The air-cooled gas water heater according to claim 7, wherein a bent portion is provided at a bottom portion of the second inner wall plate, the bent portion being located above the first vent hole and abutting against an inner wall of the outer wall plate.

10. The air-cooled gas water heater of claim 6, wherein the thickness of the first sub air sandwich is less than the thickness of the second sub air sandwich.

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