CN118274459A

CN118274459A - Gas water heater

Info

Publication number: CN118274459A
Application number: CN202211739139.9A
Authority: CN
Inventors: 刘锋; 田建均; 刘世贤; 杨金玲
Original assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2024-07-02
Also published as: WO2024141115A1

Abstract

The invention discloses a gas water heater. The combustion chamber structure of the gas water heater comprises a box body and an inner coaming, and a combustion chamber is formed in the box body; the inner coaming is arranged on the inner side of the box body, an air cooling channel with an air inlet and an air outlet is formed between the inner coaming and the box body, the air inlet is formed in the box body, and the air outlet is formed in the inner coaming; the inner coaming is provided with a first air guide part towards one side of the combustion chamber, so that when the air in the air cooling channel flows, the air flow forms a cooling air film on the wall surface of the first air guide part. According to the technical scheme, heat can be prevented from being conducted to the box body, and the temperature of the outer surface of the combustion chamber is effectively reduced.

Description

Gas water heater

Technical Field

The invention relates to the technical field of household appliances, in particular to a gas water heater.

Background

In the related art, in order to avoid damage to other parts of the gas water heater caused by outward transfer of high-temperature heat energy of a combustion chamber of the gas water heater, a coil is generally wound on the outer side of the tank body, and the surface temperature of the tank body is reduced through the coil. However, the gas water heater has complex structure and process, condensed water is easy to appear at the coil pipe, and the coil pipe is easy to have problems of frost crack, corrosion perforation and the like under the severe use environment.

Disclosure of Invention

The invention mainly aims to provide a gas water heater, which aims to cancel a coil pipe structure for cooling the surface of a combustion chamber and can reduce the surface temperature of the combustion chamber.

In order to achieve the above object, the present invention provides a gas water heater including a combustion chamber structure, the combustion chamber structure including:

The combustion chamber is formed on the inner side of the box body; and

The inner coaming is arranged on the inner side of the box body, an air cooling channel with an air inlet and an air outlet is formed by the inner coaming and the box body, the air inlet is formed in the box body, and the air outlet is formed in the inner coaming;

The inner coaming in the air cooling channel is provided with a first air guide part towards one side of the combustion chamber, so that when the air in the air cooling channel flows, the air flow forms a cooling air film on the wall surface of the first air guide part.

In an embodiment of the invention, the first air guiding portion extends obliquely from bottom to top toward the inner cavity of the combustion chamber.

In an embodiment of the present invention, the inner coaming is provided with a second air guiding portion at the air outlet, and the second air guiding portion is opened upward and is used for guiding the air flow in the air cooling channel upward.

In an embodiment of the present invention, the second air guiding portion is a groove on the inner coaming, the groove is recessed towards the inner cavity of the combustion chamber, and a gap of the air outlet is formed by staggering a wall surface of the groove and a wall surface of the inner coaming, so that air flow in the air cooling channel is guided upwards.

In an embodiment of the present invention, the inner coaming is recessed towards the inner cavity of the combustion chamber to form a cavity portion, and a surrounding edge is provided around the periphery of the cavity portion, and the surrounding edge is abutted against the inner wall surface of the box body, so that the inner wall surface of the cavity portion and the box body form the air cooling channel;

the first air guiding part is formed on the concave cavity part.

In an embodiment of the present invention, a distance between an inner wall surface of the concave cavity portion and an inner wall surface of the case body gradually increases from bottom to top.

In an embodiment of the present invention, in a height direction, the inner coaming has at least two rows of the concave cavity portions, each row of the concave cavity portions and the box form one air cooling channel, and each air cooling channel has the air inlet and the air outlet.

In an embodiment of the present invention, the inner coaming is provided with a supporting protrusion towards the box body, the supporting protrusion is disposed between two adjacent rows of concave cavity portions, and the supporting protrusion abuts against the box body and extends transversely along an inner wall surface of the box body, so as to form at least two rows of air cooling channels in a height direction.

In an embodiment of the present invention, one air cooling channel has at least two rows of air outlets in a height direction, and a first air guiding portion is disposed between two adjacent rows of air outlets.

In an embodiment of the present invention, in the same air cooling channel, the air outlet is located above the air inlet.

In an embodiment of the present invention, ribs are protruding towards the inner coaming on the side wall of the box body, and the ribs extend up and down to divide the air cooling channel into at least two sub air cooling channels, and the at least two sub air cooling channels are mutually communicated.

In an embodiment of the invention, the air inlet is a bar-shaped hole; and/or, the air outlet is a strip-shaped hole.

In an embodiment of the invention, the gas water heater further comprises a combustor, a heat exchanger and a fan;

the burner is arranged at the bottom of the box body, the heat exchanger is arranged at the top of the box body, and the fan is arranged at the top of the heat exchanger.

In the combustion chamber structure, a combustion chamber is formed in a box body, an inner coaming is arranged on the inner side of the box body, an air cooling channel is formed between the inner coaming and the box body, an air inlet of the air cooling channel is positioned on the box body, and an air outlet of the air cooling channel is positioned on the inner coaming, so that external cold air can enter the air cooling channel from the air inlet to exchange heat with the inner coaming, the inner coaming is cooled and insulated, and heat is prevented from being conducted to the box body; meanwhile, the air absorbing the heat of the inner coaming can enter the combustion chamber from the air outlet to realize secondary air supplement, so that the air flow in the air cooling channel is ensured, and the cooling and heat insulation effects are ensured. In addition, be equipped with first wind-guiding portion in the side of coaming towards the combustion chamber for when the gas in the forced air cooling passageway flows, the air current forms the cooling air film on the wall of first wind-guiding portion, keeps apart the wall of first wind-guiding portion with high temperature flue gas, thereby can separate the heat in the combustion chamber to first wind-guiding portion conduction, further prevent the heat conduction to on the box, effectively reduce the temperature of the surface of 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 that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a gas water heater according to an embodiment of the present invention;

FIG. 2 is a schematic view of an embodiment of a combustion chamber structure according to the present invention;

FIG. 3 is a schematic view of a combustion chamber structure according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at M;

FIG. 5 is a schematic view of the structure of the combustion chamber of the present invention without the outer cover plate;

FIG. 6 is a front view of the structure of the embodiment of FIG. 5;

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

FIG. 8 is a schematic view of the structure of an outer bottom frame according to an embodiment of the present invention;

fig. 9 is a schematic structural view of an inner bottom frame according to an embodiment of the present invention.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a gas water heater, which aims to achieve the purpose of canceling a cooling coil structure by arranging an air cooling channel around a combustion chamber and cooling the surface of the combustion chamber by using the air cooling channel, and simultaneously can prevent the surface temperature of the combustion chamber from being too high to cause loss to surrounding devices.

In one embodiment, the gas water heater includes a combustion chamber structure, a burner 30, a heat exchanger 40, and a fan 50. The burner 30 functions as ignition combustion. The combustion chamber structure provides a combustion space for combustion of the fuel gas and the air, and high-temperature flue gas generated after the fuel gas and the air are mixed and combusted flows upwards to the heat exchanger 40 to heat a device (such as a water pipe) to be heated in the heat exchanger 40. The fan 50 plays a role in driving fuel gas and air to enter the combustion chamber for combustion, conveying the high-temperature flue gas after combustion to the heat exchanger 40 for heat exchange, and then discharging the waste gas after heat exchange. Wherein, fan 50, heat exchanger 40, combustion chamber and combustor 30 set gradually from top to bottom, and fan 50 work so that the negative pressure is produced in the combustion chamber, and the high temperature flue gas in the combustion chamber is continuously upwards conveyed under the action of fan 50. The following is a detailed description of specific embodiments of the combustion chamber structure.

In the embodiment of the present invention, as shown in fig. 1 to 4 and fig. 8 and 9, the combustion chamber structure includes a case 10 and an inner shroud 20.

A combustion chamber A is formed in the box body 10;

the inner coaming 20 is arranged on the inner side of the box body 10, the inner coaming 20 and the box body 10 form an air cooling channel B with an air inlet 101 and an air outlet 201, the air inlet 101 is arranged on the box body 10, and the air outlet 201 is arranged on the inner coaming 20;

The inner shroud 20 of the air cooling channel B is provided with a first air guide portion 23 on a side facing the combustion chamber a, so that when the air in the air cooling channel B flows, the air flow forms a cooling air film on the wall surface of the first air guide portion 23.

In this embodiment, a combustion chamber a that is open up and down is formed in a box 10, an inner shroud 20 is disposed in the box 10, an air cooling channel B having an air inlet 101 and an air outlet 201 is configured between the inner shroud 20 and the box 10, the air inlet 101 is disposed on the box 10 and is communicated with the outside and the air cooling channel B, and the air outlet 201 is disposed on the inner shroud 20 and is communicated with the combustion chamber a, so that external cold air can enter the air cooling channel B through the air inlet 101 and exchange heat with the wall surface of the inner shroud 20 in the air cooling channel B, after heat on the inner shroud 20 is taken away, the air flows into the combustion chamber a from the air outlet 201, and the effect of cooling and heat insulation on the surface of the box 10 while supplementing secondary air into the combustion chamber a is achieved. It can be appreciated that the high-temperature flue gas after combustion flows upwards, and the air at the air outlet 201 is sucked, so that the air in the air cooling channel B is adsorbed by the negative pressure formed at the air outlet 201, and more cold air outside enters the air cooling channel B from the air inlet 101 to exchange heat with the inner coaming 20, thereby realizing better cooling and heat insulation effects.

The first air guiding part 23 is arranged on one side of the inner coaming 20 of the air cooling channel B facing the combustion chamber a, so that when the air in the air cooling channel B flows, the air flow forms a cooling air film on the wall surface of the first air guiding part 23, and it can be understood that the wall surface of the first air guiding part 23 facing the inner cavity of the combustion chamber forms a cooling air film on the wall surface facing the air cooling channel B. Specifically, when cold air is introduced into the combustion chamber a from the air outlet 201 on the wall surface of the high-temperature environment, the cold air flows to the air flowing direction under the pressure and friction force of the high-temperature flue gas in the combustion chamber a, and is adhered to the wall surface of the first air guiding part 23, so that the wall surface of the first air guiding part 23 is isolated from the high-temperature flue gas to form a cooling air film with lower temperature, thereby preventing heat in the combustion chamber a from being conducted to the first air guiding part 23, having good cooling protection effect on the wall surface of the first air guiding part 23 facing the inner cavity of the combustion chamber, and forming an air cooling channel B between the inner coaming 20 and the box 10, and forming the cooling air film on the wall surface of the first air guiding part 23 facing one side of the air cooling channel B in the process of flowing from the air inlet 101 to the air outlet 201, so as to further prevent heat from being conducted to the box 10, and ensuring better cooling and heat insulation effects.

In this embodiment, through the mode of cooling in the side portion of combustion chamber A that sets up air cooling passageway B, compare in prior art in the structure of combustion chamber A surface winding cooling coil pipe, simplified the structure, reduced the structural cost, also can not appear simultaneously because of a great deal of problem that coil pipe structure produced (like coil pipe department easily appears the comdenstion water, in the adverse circumstances of service environment, the coil pipe also takes place frost crack and corrodes perforation etc.) easily, also reduced follow-up maintenance cost.

In practical application, the shape and structure of the first air guiding portion 23 may be determined according to practical situations, for example, the first air guiding portion 23 may be a slant structure or a curved structure. Optionally, the first air guiding portion 23 is located above the air outlet 201.

It can be appreciated that the air inlet 101 of the air cooling channel B in the gas water heater is arranged on the box 10, the air outlet 201 is arranged on the inner surrounding plate 20, the external inlet and the internal outlet are preferably suitable for the forced-air type gas water heater, the fan 50 is arranged above the heat exchanger 40, and negative pressure is formed in the box 10 in an upward air suction manner, so that external air can smoothly enter the air cooling channel B, the sealing requirement of the box 10 is lower, and the manufacturing process difficulty is simpler.

Alternatively, the inner coaming 20 and the box body 10 may be fixed by screw connection or riveted, and the air cooling channel B between the inner coaming 20 and the box body 10 may be disposed on one side or the peripheral side of the combustion chamber a, which may be specifically determined according to the actual structural layout.

Alternatively, the shape of the air inlet 101 may be determined according to practical situations, for example, a round hole, a square hole, a bar hole, or other special-shaped holes. The shape of the air outlet 201 may be determined according to practical situations, for example, a round hole, a square hole, a bar hole or other special-shaped holes.

In the combustion chamber structure of the technical scheme of the invention, a combustion chamber A is formed in a box body 10, an inner coaming 20 is arranged on the inner side of the box body 10, an air cooling channel B is formed by the inner coaming 20 and the box body 10, an air inlet 101 of the air cooling channel B is positioned on the box body 10, and an air outlet 201 is positioned on the inner coaming 20, so that external cold air can enter the air cooling channel B from the air inlet 101 to exchange heat with the inner coaming 20, cool and insulate the inner coaming 20, and prevent heat from being conducted to the box body 10; meanwhile, the air absorbing the heat of the inner coaming 20 can enter the combustion chamber A from the air outlet 201 to realize secondary air supplementing, so that the air flow in the air cooling channel B is ensured, and the cooling and heat insulation effects are ensured. In addition, the first air guide part 23 is arranged on one side of the inner coaming 20 facing the combustion chamber A, so that when the air in the air cooling channel B flows, a cooling air film is formed on the wall surface of the first air guide part 23 by the air flow, and the wall surface of the first air guide part 23 is isolated from high-temperature flue gas, so that heat in the combustion chamber A can be prevented from being conducted to the first air guide part 23, heat is further prevented from being conducted to the box 10, and the temperature of the outer surface of the combustion chamber A is effectively reduced.

In an embodiment of the present invention, referring to fig. 3 to 7, the first air guiding portion 23 is disposed to extend obliquely from bottom to top toward the inner cavity of the combustion chamber a.

It can be understood that the first air guiding portion 23 plays a role of guiding the air flow, and at the same time, the cooling air film can be formed on the wall surface of the first air guiding portion 23 by the cool air flow blown out from the air outlet 201. In the forced draft gas water heater, the fan 50 draws air upwards, and the air flow tends to be more towards the middle more upwards, in this embodiment, the first air guiding portion 23 extends from bottom to top and is inclined towards the inner cavity of the combustion chamber a, so that the cold air flow blown out from the air outlet 201 can flow upwards along the wall surface of the first air guiding portion 23 inclined inwards more, and the cold air flow is prevented from leaving the wall surface of the first air guiding portion 23 too early, thereby further improving the cooling and heat insulation effects on the inner coaming 20. It will be appreciated that the first air guiding portion 23 is arranged to extend obliquely inwardly, and that the effect of the attachment of the cold air flow is better than in the case of a vertical extension (the more upward the air flow tends to be in the middle, the less upward the vertical surface is in contact with the air flow), thereby achieving a better cooling and insulating effect.

Optionally, this first wind-guiding portion 23 sets up to the swash plate of inward sloping, and at this moment, first wind-guiding portion 23 not only can let the cold air current of combustion chamber A side more adhere to on the wall, can also play the water conservancy diversion effect to the air current of forced air cooling passageway B side, can understand that the gaseous cross-sectional area that first wind-guiding portion 23 is located in forced air cooling passageway B is the increase gradually to can reduce the resistance that the cooling gas got into in the forced air cooling passageway B, prevent that the air current in the forced air cooling passageway B from piling up, make outside cold air go into more smoothly, the cooling effect is better.

In an embodiment of the present invention, referring to fig. 3 to 9, the inner shroud 20 is provided with a second air guiding portion 24 at the air outlet 201, and the second air guiding portion 24 is opened upward for guiding the air flow in the air cooling channel B upward.

In the foregoing embodiment, it can be seen that the cooling air film can be formed on the wall surface of the first air guiding portion 23 by the cold air flow blown out from the air outlet 201, and in order to make more cold air flow contact with the first air guiding portion 23, in this embodiment, the second air guiding portion 24 is disposed at the air outlet 201, and the second air guiding portion 24 can guide the air flow blown out from the air outlet 201 upward, that is, toward the direction of the first air guiding portion 23, so that more cold air flow contacts with the first air guiding portion 23, and further the cooling and heat insulation effects are improved.

In practical application, the shape and structure of the second air guiding portion 24 may be a pipe structure or an air guiding plate structure, as long as the cold air flow blown out from the air outlet 201 can be guided upward.

In an embodiment, the second air guiding portion 24 is a concave groove on the inner shroud 20 with a side facing the inner cavity of the combustion chamber a, and a gap of the air outlet 201 is formed by staggering the wall of the concave groove and the wall surface of the inner shroud 20, so as to guide the air flow in the air cooling channel B upwards.

In this embodiment, the second air guiding portion 24 is configured as a recess in which the inner shroud 20 is recessed toward the inner cavity of the combustion chamber a at the air outlet 201, so that the wall of the recess and the wall surface of the inner shroud 20 are staggered to form a gap of the air outlet 201, and the cold air flowing out from the air outlet 201 can flow out along the wall of the recess, so that the cold air is guided upward, and more cold air contacts with the first air guiding portion 23.

Optionally, the second wind guiding portion 24 is of unitary construction with the inner shroud 20.

In an embodiment of the present invention, referring to fig. 2 to 9, the inner shroud 20 is recessed toward the inner cavity of the combustion chamber a to form a cavity portion 20a, the inner shroud 20 is provided with a peripheral edge 20B around the periphery of the cavity portion 20a, and the peripheral edge 20B abuts against the inner wall surface of the box 10, so that the inner wall surface of the cavity portion 20a and the box enclose an air cooling channel B; the first air guide portion 23 is formed on the concave portion 20 a.

In this embodiment, the structure of the air cooling channel B is described, and the air cooling channel B is configured between the inner shroud 20 and the case 10, where the inner shroud 20 has a concave cavity portion 20a recessed toward the inner cavity of the combustion chamber a, and a peripheral edge 20B surrounding the periphery of the concave cavity portion 20a, and the peripheral edge 20B abuts against the inner wall surface of the case 10, so that the inner wall surface of the concave cavity portion 20a and the inner wall surface of the case 10 are disposed at opposite intervals, thereby forming the air cooling channel B. On this basis, the first air guiding portion 23 is provided on the cavity portion 20a, and the air outlet 201 is provided on the cavity portion 20 a. The first air guiding portion 23 may be disposed above the air outlet 201, so that the cold air flow blown out from the air outlet 201 may form a cooling air film on a wall surface of the first air guiding portion 23 facing the side of the combustion chamber a, thereby implementing an air film cooling function. Or the first air guiding portion 23 may also be disposed below the air outlet 210, at this time, the first air guiding portion 23 plays a role in guiding the air flow in the air cooling channel B, so that the cold air flow in the air cooling channel B can flow upward from the air inlet 101 to the air outlet 201, so as to adapt to the trend of the air flow of the forced-air gas water heater more, and the attachment effect of the cold air flow is better.

Specifically, the case 10 includes an outer frame 11 having a U shape and an outer cover plate 12 provided to cover the outer frame 11, and the outer frame 11 and the outer cover plate 12 enclose a combustion chamber a which is opened up and down. The inner coaming 20 comprises a U-shaped inner bottom frame 21 and an inner cover plate 22, the inner bottom frame 21 is arranged on the inner side of the outer bottom frame 11, the inner bottom frame 21 is sunken towards the inner cavity of the combustion chamber A, and an air cooling channel B positioned on the left side, the right side and the back side of the combustion chamber A is formed by the inner bottom frame 21 and the outer bottom frame 11, wherein an air inlet 101 is positioned on the outer bottom frame 11, and an air outlet 201 is positioned on the inner bottom frame 21; the inner cover plate 22 is arranged on the inner side of the outer cover plate 12, the inner cover plate 22 is recessed towards the inner cavity of the combustion chamber A, and an air cooling channel B positioned on the front side of the combustion chamber A is formed by the inner cover plate 22 and the outer cover plate 12, wherein the air inlet 101 is positioned on the outer cover plate 12, and the air outlet 201 is positioned on the inner cover plate 22.

The air-cooling passage B may be formed between the inner peripheral plate 20 and the case 10, and may be formed only between the inner bottom frame 21 and the outer bottom frame 11, or may be formed only between the inner cover plate 22 and the outer cover plate 12, or may be formed between the inner bottom frame 21 and the outer bottom frame 11, and between the inner cover plate 22 and the outer cover plate 12. In order to ensure a better cooling effect, in this embodiment, air cooling channels B are formed between the inner bottom frame 21 and the outer bottom frame 11 and between the inner cover plate 22 and the outer cover plate 12, that is, air cooling channels B are disposed around the combustion chamber a, so as to ensure a lower temperature of all the outer surfaces around the combustion chamber a. Correspondingly, the outer bottom frame 11 and the outer cover plate 12 are respectively provided with an air inlet 101, and the inner bottom frame 21 and the inner cover plate 22 are respectively provided with an air outlet 201.

Further, the outer bottom frame 11 has two opposite outer side plates and an outer back plate connecting the two outer side plates, the inner bottom frame 21 has two opposite inner side plates and an inner back plate connecting the two inner side plates, wherein the two inner side plates and the corresponding two outer side plates form an air cooling channel B on the left and right sides of the combustion chamber a, the inner back plate and the outer back plate form an air cooling channel B on the back side of the combustion chamber a, and in practical application, the air cooling channels B may be provided on both sides and/or the back.

Alternatively, the air cooling channels B on different sides may or may not be in communication.

Optionally, the inner subframe 21 is riveted to the outer subframe 11, and the inner decking 22 is riveted to the outer decking 12.

In an embodiment of the present invention, referring to fig. 3 to 9, the interval between the inner wall surface of the concave portion 20a and the inner wall surface of the case 10 is gradually increased from bottom to top.

It can be understood that the cavity portion 20a and the box 10 are spaced to form the air cooling channel B, the fan 50 is disposed above the heat exchanger 40, so that the air flow is driven to flow from bottom to top by the forced suction function of the fan 50, the air flow tends to flow from top to bottom, the space between the inner wall surface of the cavity portion 20a and the inner wall surface of the box 10 increases gradually from bottom to top, that is, the depth of the cavity portion 20a recessed toward the inner cavity of the combustion chamber a increases gradually, so that the cooling air flow in the air cooling channel B tends to flow from bottom to top gradually toward the middle of the combustion chamber a, so that the cooling air flow can contact with the inner wall surface of the cavity portion 20a more, and the cooling effect is further improved. On the other hand, the cavity portion 20a is inclined towards the wall surface of the combustion chamber a from bottom to top and towards the inner cavity of the combustion chamber a, so as to play a role in guiding the air flow in the combustion chamber a, and enable the high-temperature flue gas in the combustion chamber a to gather more upwards, so as to achieve a better heating effect on the heat exchanger 40.

In an embodiment of the present invention, referring to fig. 3 to 9, in the height direction, the inner coaming 20 has at least two rows of concave cavity parts 20a, and each row of concave cavity parts 20a and the box 10 form an air cooling channel B, and each air cooling channel B has an air inlet 101 and an air outlet 201.

In this embodiment, at least two rows of concave cavity parts 20a are formed by the inner coaming 20 in the height direction, and each row of concave cavity parts 20a and the box body 10 form an air cooling channel B, so that the inner coaming 20 and the box body 10 form at least two air cooling channels B distributed at intervals in the height direction, and compared with the air cooling channels B directly extending from the bottom to the top, the path of air flow in the air cooling channels B is shortened. It can be appreciated that the external cold air enters the air cooling channel B from the air inlet 101 and exchanges heat with the inner coaming 20, so that the temperature of the cold air flow after heat exchange is increased, if the cold air flow remains in the air cooling channel B for too long, the cooling effect is weakened, and the cooling efficiency is improved by separating the inner coaming 20 from the box 10 into at least two air cooling channels B in the height direction, so that the cooling air flow flows out into the combustion chamber a as soon as possible after heat exchange with the inner coaming 20, and then the cold air flow with lower temperature can be reintroduced into the air cooling channel B from the air inlet 101.

Specifically, the inner peripheral plate 20 is provided with support protrusions 26 toward the case 10, the support protrusions 26 being provided between the adjacent two rows of concave portions 20a, the support protrusions 26 abutting against and extending laterally along the inner wall surface of the case 10 to form at least two air discharge cooling passages B in the height direction.

In the present embodiment, the inner peripheral plate 20 is provided with the supporting convex portion 26, and the supporting convex portion 26 can play a role in supporting and reinforcing, and also play a role in separating different air cooling passages B. It will be appreciated that the supporting protrusion 26 may be provided by protruding the inner peripheral plate 20 toward the case 10, which may prevent the deformation of the inner peripheral plate 20, improve the structural strength of the inner peripheral plate 20, and meanwhile, the supporting protrusion 26 abuts against the case 10 to support the case 10, so that the structure of the case 10 is more stable and reliable. In addition, the supporting protrusions 26 extend transversely along the inner wall surface of the case 10, ensure the separation effect of the air cooling passages B on the upper and lower sides, and also function to close the air cooling passages B so that the cooling air flow inside thereof is blown out from the air outlet 201. Alternatively, the support protrusions 26 on the inner shroud 20 may be die-formed.

Optionally, in the same air cooling channel B, the air inlet 101 is located below the air outlet 201. In this embodiment, the air inlet 101 is disposed below the air outlet 201, so that the direction of the air flow in the air cooling channel B is from bottom to top, which is consistent with the direction of the high temperature air flow in the combustion chamber a, and compared with the manner in which the air inlet 101 is disposed below the air outlet 201, the resistance of the air flow in the air cooling channel B is lower, and the requirement on the fan 50 is lower. Meanwhile, the cold air flows out from the air outlet 201 above after absorbing the heat of the inner coaming 20, so that the influence on the combustion efficiency in the combustion chamber A caused by the too low temperature of the air entering the combustion chamber A is avoided.

In practical application, the number and distribution of the air inlets 101 and the air outlets 201 on the air cooling channel B may be determined according to practical situations, for example, one air inlet 101 and one air outlet 201 may be disposed in one air cooling channel B, one air inlet 101 and multiple air outlets 201 may also be disposed, multiple air inlets 101 and one air outlet 201 may also be disposed, and multiple air inlets 101 and multiple air outlets 201 may also be disposed.

In an embodiment, each air cooling channel B has at least two air inlets 101 and/or at least two air outlets 201. In this embodiment, by providing at least two air inlets 101, the air inlet area of the air cooling channel B is increased, so as to increase the air inlet amount of the air cooling channel B. Correspondingly, by arranging at least two air outlets 201, the air outlet area of the air cooling channel B is increased, so that the air outlet quantity of the air cooling channel B is increased, and the cooling air quantity is increased.

It can be appreciated that when each air cooling channel B has at least two air inlets 101 and at least two air outlets 201, the at least two air inlets 101 may be arranged at intervals along the transverse direction of the box 10, and the at least two air outlets 201 may be arranged at intervals along the transverse direction of the inner shroud 20, so that the cold air flow in the air cooling channel B may be distributed more uniformly in the transverse direction of the inner shroud 20, and the cooling effect on the inner shroud 20 may be more uniform.

In combination with the second air guiding portions 24 disposed at the air outlets 201 in the foregoing embodiment, each air outlet 201 has the second air guiding portions 24, so that at least two second air guiding portions 24 are also arranged at intervals along the transverse direction of the inner coaming 20, and the second air guiding portions 24 play a role in guiding the cold air flow upwards.

In one embodiment, one air cooling channel B has at least two air outlets 201 in the height direction, and a first air guiding portion 23 is disposed between two adjacent air outlets 201.

It can be appreciated that each air cooling channel B has at least two air outlets 201, and the first air guiding portion 23 is disposed between two adjacent air outlets 201, so that the cold air flow blown out from the air outlet 201 below can form a cooling air film on the first air guiding portion 23 above the cooling air film, and thus the air flow of the air outlet 201 above is not affected. At the same time, the air flow in the air cooling channel B is guided by the inner wall surface of the first air guiding portion 23, and the cold air flow forms a cooling air film on the inner wall surface of the first air guiding portion 23 and is blown out from the air outlet 201 above.

Further, at least two air cooling channels B are arranged between the inner coaming 20 and the box 10 in the height direction, and optionally, each air cooling channel B is provided with a first air guiding part 23, so that cooling air films can be formed on the first air guiding parts 23 at different heights, and the purpose of multi-stage cooling is achieved.

Alternatively, a third air guiding portion 25 may be disposed between the upper edge of the first air guiding portion 23 and the lower edge of the upper air outlet 201, where the third air guiding portion 25 is formed by recessing the recessed cavity portion 20a toward the side of the box 10, so that a flow channel that expands first and then contracts is formed on the side of the cooling air channel B, and the air speed and pressure of the air flow of the upper air outlet 201 are further improved. In addition, when the first air guiding portion 23 is inclined toward the inner cavity of the combustion chamber a from the combustion chamber a side and the third air guiding portion 25 is recessed toward the air cooling passage B, when the plurality of air outlets 201 are provided in the height direction, the condition that the wall surface of the inner shroud 20 is always inclined toward the inner cavity of the combustion chamber a to reduce the volume of the inner cavity of the combustion chamber a is not occurred, thereby ensuring the volume of the inner cavity of the combustion chamber a.

In an embodiment, a third air guiding portion 25 that is concave towards the box 10 may be disposed below the air outlet 201, where the third air guiding portion 25 forms a necking structure below the air outlet 201, and in a case where the air volume is fixed, the air speed of the air flow passing through the third air guiding portion 25 is increased, the air flow pressure at the air outlet 201 is increased, and the cold air flow can flow to the first air guiding portion 23 more through the upward guiding action of the second air guiding portion 24. Alternatively, the third air guiding portion 25 may be a concave curved plate structure.

In an embodiment of the present invention, referring to fig. 2 to 9, ribs 13 are protruding toward the inner coaming 20 on the side wall of the box 10, and the ribs 13 are disposed to extend up and down to divide the air cooling channel B into at least two sub air cooling channels, and the at least two sub air cooling channels are mutually communicated.

In this embodiment, the lateral wall of box 10 is equipped with rib 13, and this rib 13 can play the effect of strengthening box 10 structural strength, guarantees the planarization of box 10, simultaneously, rib 13 is protruding to establish towards interior bounding wall 20 to extend from top to bottom, can separate into two at least sub-forced air cooling passageway with forced air cooling passageway B, make the cooling air current distribute more evenly on the wall of bounding wall 20 including, both contact more evenly, thereby guarantee more even cooling effect, prevent interior bounding wall 20 cooling inhomogeneous and warp.

It can be appreciated that at least two sub-air cooling channels may be mutually connected or disconnected, and when mutually connected, the air inlet 101 and the air outlet 201 thereof may be shared; when not in communication with each other, each sub-air cooling passage has its respective air inlet 101 and air outlet 201.

In an embodiment of the present invention, referring to fig. 1 to 6, the burner 30 is provided at the bottom of the case 10, the heat exchanger 40 is provided at the top of the case 10, and the fan 50 is provided at the top of the heat exchanger 40.

In this embodiment, the fan 50 of the gas water heater is disposed at the top of the heat exchanger 40, and is a forced-pumping gas water heater, so that the gas flow sequentially passes through the burner 30, the combustion chamber a, the heat exchanger 40 and the fan 50 from bottom to top, and the combustion exhaust gas is discharged through the fan 50. As can be appreciated, under the suction of the blower 50, negative pressure is formed in the combustion chamber a, so that the external air is sucked into the air cooling channel B to exchange heat with the inner coaming 20, so as to cool and insulate the inner coaming 20, and prevent heat from being conducted to the box 10; meanwhile, the air absorbing the heat of the inner coaming 20 can enter the combustion chamber A from the air outlet 201 to realize secondary air supplementing, so that the air flow in the air cooling channel B is ensured, and the cooling and heat insulation effects are ensured. In addition, the first air guide part 23 is arranged on one side of the inner coaming 20 facing the combustion chamber A, so that the air flow of the air cooling channel B forms a cooling air film on the wall surface of the first air guide part 23, and the wall surface of the first air guide part 23 is isolated from high-temperature smoke, thereby being capable of blocking heat in the combustion chamber A from being conducted to the first air guide part 23, further preventing heat from being conducted to the box body 10, and effectively reducing the temperature of the outer surface of the combustion chamber A.

In an embodiment of the present invention, referring to fig. 2 to 9, in the height direction, the inner shroud 20 is provided with at least two exhaust port groups, each having at least two air outlets 201 arranged at intervals.

It will be appreciated that the at least two sets of outlets in the height direction may be located on the same air cooling channel B or on different air cooling channels B.

When the cooling air flows are positioned on the same air cooling channel B, a part of cooling air flow entering from the outside is blown out from the lower air outlet group, and the other part of cooling air flow continues to flow upwards and is blown out from the upper air outlet group, so that the air outlet of the same air cooling channel B is divided into at least two parts in the height direction, and the effect of uniformly cooling the inner wall surface of the inner coaming 20 in the height direction is improved.

When the air cooling device is positioned on different air cooling channels B, different rows of air outlet groups are correspondingly provided with different air inlets 101, and air is blown from the corresponding air outlet groups by corresponding air inlets 101, so that the cold air flow is prevented from remaining in the air cooling channels B for too long time, and flows out to the combustion chamber A as soon as possible after heat exchange with the inner coaming 20, and further, the cold air flow with lower temperature can be reintroduced from the air inlets 101 into the air cooling channels B, so that the cooling efficiency is improved.

And each exhaust port group has at least two air outlets 201 arranged at intervals, the effect of uniformly cooling the inner wall surface of the inner shroud 20 in the transverse direction is promoted.

In an embodiment of the present invention, the air outlets 201 of two adjacent air outlet groups are staggered in the height direction.

In this embodiment, the air outlets 201 of the two adjacent air outlet groups are staggered, it is understood that the air outlet 201 of the upper row is different from the air outlet 201 of the lower row, when the air outlet 201 of the upper row blows toward the first area, other areas of the inner shroud 20 except the first area may form a negative pressure area, and the negative pressure area is easily deformed by flame combustion in the combustion chamber a, based on this, the air outlet 201 of the lower row blows toward other areas except the first area, so that the range of blowing onto the inner wall surface of the inner shroud 20 can be enlarged, the air flow is uniform, the negative pressure is prevented from occurring only at the place where no air is blown toward the same part, and the air is burned by flame, thereby ensuring the structural reliability of the inner shroud 20, and further improving the cooling protection effect on the inner wall surface of the inner shroud 20.

In addition, the air outlets 201 of the upper and lower adjacent rows are staggered, so that the structure strength of the inner coaming 20 can be enhanced, and the phenomenon that holes are formed in the same height direction to deform is prevented.

In practical application, the number of the air outlets 201 of each row of air outlet groups may be the same or different according to the practical situation.

Alternatively, in practical application, the number of the air outlets 201 of the air outlet group in one row may be determined according to practical situations, for example, two, three, four, or five air outlets may be used. The upper row of air outlet groups can be set to be three air outlets 201 which are arranged at intervals, and then two, three or four air outlets 201 which are arranged at intervals can be correspondingly arranged in the lower row of air outlet groups, and the lower row of air outlets 201 are equivalent to the air distribution of the upper row of air outlets 201.

Alternatively, the size of the lateral opening of the upper row of air outlets 201 may be set to be different from the size of the lateral opening of the lower row of air outlets 201, for example, when the number of the upper row of air outlets 201 is greater than the number of the lower row of air outlets 201, the size of the lateral opening of the upper row of air outlets 201 may be set to be greater than the size of the lateral opening of the lower row of air outlets 201, so long as it is ensured that the range in which the adjacent two rows of air outlets 201 blow out can cover a larger area of the inner shroud 20. Optionally, the air outlet 201 is a bar-shaped hole.

Further, the inner coaming 20 is further provided with air supply ports 202 for communicating the combustion chamber a and the air cooling channel B, and the air supply ports 202 are located between two adjacent air outlets 201 in the same row.

It can be appreciated that, at least two air outlets 201 of the same row are arranged at intervals, a negative pressure region without air outlet is formed between two adjacent air outlets 201, and by arranging the air supply port 202 between two adjacent air outlets 201, air flow can be uniformly carried out in the transverse direction of the inner coaming 20, so that negative pressure is prevented from being generated between the two air outlets 201 due to flame combustion and easy deformation, and the structural strength of the inner coaming 20 is ensured.

Optionally, the air compensating opening 202 is a small hole, so that air can be compensated without affecting the structural strength of the inner coaming 20.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A gas water heater, characterized in that the gas water heater comprises a combustion chamber structure comprising:

The combustion chamber is formed on the inner side of the box body; and

2. The gas water heater as recited in claim 1, wherein the first air guiding portion extends obliquely from bottom to top toward the inner cavity of the combustion chamber.

3. The gas water heater as recited in claim 2, wherein said inner shroud is provided with a second air guiding portion at said air outlet, said second air guiding portion being upwardly open for guiding air flow in said air cooling passage upwardly.

4. The gas water heater as claimed in claim 3, wherein the second air guiding portion is a groove on the inner coaming, the groove wall of the groove is staggered with the wall surface of the inner coaming to form a gap of the air outlet, so as to guide the air flow in the air cooling channel upwards.

5. The gas water heater as claimed in any one of claims 1 to 4, wherein the inner shroud is recessed toward the inner cavity of the combustion chamber to form a cavity portion, the inner shroud is provided with a peripheral edge around the periphery of the cavity portion, and the peripheral edge is abutted against the inner wall surface of the tank body so that the inner wall surface of the cavity portion and the tank body enclose to form the air cooling channel;

the first air guiding part is formed on the concave cavity part.

6. The gas water heater as recited in claim 5, wherein a distance between an inner wall surface of the recessed cavity portion and an inner wall surface of the tank body gradually increases from bottom to top.

7. The gas water heater as recited in claim 6, wherein said inner shroud has at least two rows of said recessed portions in a height direction, each row of said recessed portions and said tank forming one said air cooling channel, each said air cooling channel having said air inlet and said air outlet.

8. The gas water heater as recited in claim 7, wherein said inner shroud is provided with support protrusions toward said tank, said support protrusions being provided between adjacent two rows of said recessed portions, said support protrusions abutting said tank and extending laterally along an inner wall surface of said tank to form at least two rows of said air-cooling passages in a height direction.

9. The gas water heater as recited in claim 7, wherein one of said air-cooling passages has at least two rows of said air outlets in a height direction, and said first air guiding portion is provided between two adjacent rows of said air outlets.

10. The gas water heater as recited in claim 7, wherein said air outlet is located above said air inlet in the same air cooling channel.

11. The gas water heater as recited in any one of claims 1-4, wherein ribs are provided on a side wall of the tank body toward the inner shroud, and the ribs extend up and down to divide the air cooling channel into at least two sub air cooling channels, and the at least two sub air cooling channels are mutually communicated.

12. The gas water heater as claimed in any one of claims 1 to 4, wherein the air inlet is a strip-shaped aperture; and/or, the air outlet is a strip-shaped hole.

13. The gas water heater as claimed in any one of claims 1 to 4, further comprising a burner, a heat exchanger, a fan;