CN116242030A - Gas water heater - Google Patents

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 at least two air outlet groups in the height direction, and the air outlets of the air outlet groups of two adjacent rows are arranged in a staggered way. The technical scheme of the invention ensures the cooling and heat insulation effects.

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 a gas water heater caused by outward heat energy transfer of a combustion chamber of the gas water heater (such as the gas water heater), a coil is generally wound on the outer side of a box body, and the surface temperature of the box 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 is provided with at least two exhaust port groups in the height direction, and the air outlets of the adjacent two rows of the exhaust port groups are arranged in a staggered mode.

In an embodiment of the present invention, each row of the air outlet groups has at least two air outlets spaced apart in a transverse direction.

In an embodiment of the present invention, the number of the air outlets in two adjacent rows is different.

In an embodiment of the present invention, the number of rows of the air outlet groups is at least three in the height direction, wherein the number of the air outlets of the air outlet groups in odd rows is the same, and the number of the air outlets of the air outlet groups in even rows is the same.

In an embodiment of the present invention, the lateral openings of the air outlets of two adjacent rows are different in size.

In an embodiment of the present invention, the inner coaming is further provided with a wind compensating port for communicating the combustion chamber and the air cooling channel, and one wind compensating port is arranged between two adjacent wind outlets in the same row.

In an embodiment of the present invention, the inner shroud is recessed toward the inner cavity of the combustion chamber to form a cavity portion, and a peripheral edge is provided around the periphery of the cavity portion, where the peripheral edge abuts against the inner wall surface of the box body, so that the inner wall surface of the cavity portion and the box body enclose to form the air cooling channel.

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, and the supporting protrusion abuts against the box and extends transversely, so as to divide the cavity between the inner coaming and the box into the at least two air cooling channels in the height direction.

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 invention, the air outlet is configured as a strip-shaped hole with an opening extending along the transverse direction.

In an embodiment of the present invention, a first air guiding portion is disposed on a side of the inner shroud in the air cooling channel facing the combustion chamber, so that when the air in the air cooling channel flows, the air flow forms a cooling air film on a wall surface of the first air guiding portion.

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 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.

According to the technical scheme, in the combustion chamber structure, a combustion chamber is formed in the box body, the inner coaming is arranged at intervals on the inner side of the box body, the inner coaming and the box body form an air cooling channel, 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, air absorbing heat of the inner coaming can enter the combustion chamber from the air outlet to realize secondary air supplementing, air flow in the air cooling channel is guaranteed, cooling and heat insulation effects are guaranteed, a cooling coil wound on the surface of the combustion chamber is omitted, and problems caused by a coil structure cannot occur (such as condensed water is easy to occur at the coil, frost cracking, corrosion perforation and the like are easy to occur at the coil under severe use environment). The inner coaming is provided with at least two exhaust port groups in the height direction, so that the cooling uniformity of the inner coaming in the height direction is improved, the air outlets of the adjacent two rows of air outlet groups are arranged in a staggered mode, negative pressure is prevented from being generated at a place where no air is blown only towards the same position, the flame combustion deformation is avoided, the structural reliability of the inner coaming is ensured, and the cooling protection effect on the inner wall surface of the inner coaming is further improved.

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 the structure of the combustor without the outer cover plate;

FIG. 4 is a front view of the embodiment of FIG. 3;

FIG. 5 is a cross-sectional view of K-K of FIG. 4;

FIG. 6 is a schematic view of a combustion chamber structure according to an embodiment of the present invention in semi-section;

FIG. 7 is an enlarged view of a portion of FIG. 6 at M;

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 an embodiment of the present invention, as shown in fig. 1 to 5, the gas water heater includes a tank 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 coaming 20 is provided with at least two rows of air outlet groups in the height direction, and the air outlets 201 of the adjacent two rows of air outlet groups are arranged in a staggered manner.

In this embodiment, a combustion chamber a that is open up and down is formed in the box 10, an inner shroud 20 is disposed in the box 10 at intervals, 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 exchanges 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.

In the height direction, the inner coaming 20 is provided with at least two exhaust port groups, so that the effect of uniformly cooling the inner wall surface of the inner coaming 20 in the height direction is improved. The air outlets 201 of the two adjacent air outlet groups are staggered, and it can be 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 towards a certain area, a negative pressure area is possibly formed in other areas of the inner shroud 20 except the area, and the negative pressure area is easily deformed by flame combustion in the combustion chamber A, so that the air outlet 201 of the lower row blows towards other areas except the area, the range of blowing on the inner wall surface of the inner shroud 20 can be enlarged, uniform air flow is prevented, negative pressure is generated at the place where no air is blown only towards the same part, and the air is burnt 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 upper and lower rows of air outlets 201 are staggered, which can also play a role in reinforcing the structural strength of the inner coaming 20 and prevent deformation caused by the arrangement of holes in the same height direction.

Alternatively, the number of the air outlets 201 of each row of air outlet groups may be the same or different, and the number of the air outlets 201 of different rows of air outlet groups may not be limited herein.

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. Through set up the mode of forced air cooling passageway B cooling in combustion chamber A's lateral part, compare in the structure at combustion chamber A surface winding cooling coil pipe among the prior art, simplified the structure, reduced structural cost, also can not appear simultaneously because of the coil pipe structure a great deal of problem that produces (for example coil pipe department easily appears the comdenstion water, in the abominable condition of service environment, the coil pipe also takes place frost crack and corrodes perforation etc.) easily, also reduced follow-up maintenance cost.

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 at intervals 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. The inner coaming 20 is provided with at least two exhaust port groups in the height direction, so that the cooling uniformity of the inner coaming 20 in the height direction is improved, the air outlets 201 of the adjacent two rows of air outlet groups are arranged in a staggered mode, negative pressure is prevented from being burnt and deformed by flame when the air is blown only to the same position, the structural reliability of the inner coaming 20 is guaranteed, and the cooling protection effect on the inner wall surface of the inner coaming 20 is further improved.

In an embodiment of the present invention, referring to fig. 2 to 5, each of the air outlet groups has at least two air outlets 201 spaced apart in the lateral direction.

In this embodiment, each air outlet group has at least two air outlets 201 arranged at intervals, which improves the effect of uniform cooling of the inner wall surface of the inner coaming 20 in the transverse direction, and meanwhile, compared with the case that only one air outlet 201 is arranged at the same height, at least two air outlets 201 arranged at intervals in the same row ensure the structural strength of the inner coaming 20, and prevent the inner coaming 20 from being easily deformed at the same height. It can be appreciated that, in combination with the staggered arrangement of the air outlets 201 of the two adjacent rows of air outlet groups in the foregoing embodiment, the structure strength of the inner coaming 20 can be enhanced, and the deformation caused by the arrangement of holes in the same height direction can be 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.

In practical application, the number of the air outlets 201 of the air outlet group of one row may be two, three, four or five according to practical situations.

In one embodiment, the number of outlets 201 in two adjacent rows is different. If the upper row of air outlet groups can be set as three air outlets 201 arranged at intervals, two, three or four air outlets 201 arranged at intervals can be correspondingly arranged in the lower row of air outlet groups, and the lower row of air outlets 201 are distributed in a manner of being empty to the upper row of air outlets 201.

In an embodiment, the number of rows of the air outlet groups is at least three in the height direction, wherein the number of air outlets 201 of the air outlet groups in the odd rows is the same, and the number of air outlets 201 of the air outlet groups in the even rows is the same.

In this embodiment, each of the air outlet groups has at least two air outlets 201 disposed at intervals in a horizontal direction, in a height direction, the number of air outlets 201 in the air outlet groups in the odd numbered rows is the same, and the number of air outlets 201 in the air outlet groups in the even numbered rows is the same. For example, when there are three exhaust port groups in total, the number of the exhaust ports 201 of the first exhaust port group is the same as the number of the exhaust ports 201 of the third exhaust port group, and the numbers of the exhaust ports of the first row and the third row are different from the number of the exhaust ports of the second row; when there are four air outlet groups in total, the number of air outlets 201 of the first air outlet group is the same as the number of air outlets 201 of the third air outlet group, the number of air outlets 201 of the second air outlet group is the same as the number of air outlets 201 of the fourth air outlet group, and so on, the specific number of rows is not limited herein.

Alternatively, the number of the air outlets 201 of each air outlet group may be 2, 3, 4 or 5, etc., according to the actual situation. In combination with the above-described embodiment in which the number of outlets of the odd-numbered outlet groups and the number of outlets of the even-numbered outlet groups are alternately distributed, 2 and 3 outlets 201 are taken as an example: the number of air outlets of the first air outlet group is 2, the number of air outlets of the second air outlet group is 3, the number of air outlets of the third air outlet group is 2, and the number of air outlets of the fourth air outlet group is 3. Of course, in practical application, the arrangement is not limited to the above arrangement, but may be other arrangements, and the arrangement is not limited thereto.

In this embodiment, by alternately arranging the number of the air outlets 201 of the air outlet groups of different rows, not only the area where the air outlets 201 of two adjacent rows cannot blow can be compensated, but also the uniformity of the overall air outlet can be ensured. In addition, the manufacturing die can be simplified by the alternate arrangement, and the aim of simplifying the processing technology is fulfilled.

In one embodiment, the lateral openings of the outlets 201 of two adjacent rows are different in size.

It will be appreciated that when the number of the air outlets 201 of the upper row (lower row) is greater than the number of the air outlets 201 of the lower row (upper row), the size of the lateral opening of the air outlets 201 of the upper row (lower row) may be set to be greater than the size of the lateral opening of the air outlets 201 of the lower row (upper row), so long as it is ensured that the range in which the air outlets 201 of the adjacent two rows blow out can cover a larger area of the inner panel 20.

Alternatively, the air outlet 201 is a bar-shaped hole whose opening extends in the lateral direction.

In an embodiment of the present invention, referring to fig. 2 to 6, the inner shroud 20 is further provided with a air compensating port 202 for communicating the combustion chamber a with the air cooling channel B, and an air compensating port 202 is provided 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.

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, and a peripheral edge 20B is disposed around the periphery of the cavity portion 20a on the inner shroud 20, 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.

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 the basis of this, the air outlet 201 is provided in the cavity portion 20a.

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 an embodiment of the present invention, referring to fig. 2 to 9, a side of the inner shroud 20 of the air cooling passage B facing the combustion chamber a is provided with a first air guiding portion 23, so that when the air in the air cooling passage B flows, the air flow forms a cooling air film on a wall surface of the first air guiding portion 23.

It will be appreciated that the wall surface of the first air guiding portion 23 facing the combustion chamber inner cavity forms a cooling air film, and the wall surface facing the air cooling passage B also forms a cooling air film. 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 an embodiment of the present invention, referring to fig. 2 to 9, 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 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.

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, 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, 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.

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 (15)

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

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 is provided with at least two exhaust port groups in the height direction, and the air outlets of the adjacent two rows of the exhaust port groups are arranged in a staggered mode.

2. The gas water heater as recited in claim 1, wherein each row of said air outlet groups has at least two of said air outlets spaced apart in a transverse direction.

3. The gas water heater as recited in claim 2, wherein the number of said outlets of adjacent rows is different.

4. The gas water heater as recited in claim 2, wherein the number of rows of said air outlet groups is at least three in a height direction, wherein the number of said air outlets of the air outlet groups in odd rows is the same and the number of said air outlets of the air outlet groups in even rows is the same.

5. The gas water heater as recited in claim 2, wherein the lateral openings of said outlets of adjacent rows are different in size.

6. The gas water heater as recited in claim 2, wherein said inner shroud is further provided with a supply port for communicating said combustion chamber with said air cooling passage, and said supply port is provided between two adjacent air outlets in the same row.

7. The gas water heater as recited in any one of claims 1-6, wherein the inner shroud is recessed toward the inner cavity of the combustion chamber to form a cavity portion, and a peripheral edge is provided around a periphery of the cavity portion, and the peripheral edge abuts against an 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.

8. The gas water heater as recited in claim 7, 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.

9. The gas water heater of claim 7, 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.

10. The gas water heater of claim 9, wherein the inner shroud is provided with a support protrusion toward the tank, the support protrusion abutting the tank and extending laterally to divide a cavity between the inner shroud and the tank into the at least two air-cooled channels in a height direction.

11. The gas water heater as recited in claim 9, wherein said air outlet is located above said air inlet in the same air cooling channel.

12. The gas water heater as claimed in any one of claims 1 to 6, wherein the outlet is provided as a strip-shaped aperture with an opening extending in a transverse direction.

13. The gas water heater as recited in any one of claims 1 to 6, wherein a first air guide portion is provided on a side of the inner shroud in the air cooling passage facing the combustion chamber, such that when the air in the air cooling passage flows, the air flow forms a cooling air film on a wall surface of the first air guide portion.

14. The gas water heater as recited in claim 13, wherein the first air guide portion extends obliquely from bottom to top toward the inner cavity of the combustion chamber.

15. The gas water heater as claimed in any one of claims 1 to 6, further comprising a burner, a heat exchanger, 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.

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