Gas water heater

Abstract

This invention relates to a gas water heater, comprising a combustion assembly, a heat exchange assembly, and an atomizing assembly. The combustion assembly includes an inner shell, an outer shell, and a burner. A combustion chamber is located within the inner shell, with the burner positioned below it. The heat exchange assembly is positioned above the inner shell, and the outer shell surrounds the periphery of the inner shell, with a gap between them forming a sealed cooling channel. This cooling channel communicates with the combustion chamber. An atomizing assembly is located on one side of the outer shell, connecting the cooling channel and the condensate pipe of the heat exchange assembly. This atomizing assembly atomizes the condensate generated by the heat exchange assembly and delivers it to the cooling channel for heat exchange between the outer and inner shells, reducing their temperatures. Part of the atomized condensate can also enter the combustion chamber from the cooling channel, absorbing heat from the burner and evaporating, thereby reducing the burner's combustion temperature and producing less polluting gas.

Description

Technical Field

[0001] This invention relates to the field of hot water equipment technology, and in particular to a gas water heater. Background Technology

[0002] With the continuous improvement of people's living standards, water heaters have become an indispensable household appliance in daily life. Currently, the heat exchange area of ​​condensing gas water heaters mainly takes place in two areas: the main heat exchanger and the condenser. After the gas and air are fully mixed, they enter the burner for combustion. The high-temperature flue gas produced by combustion passes through the main heat exchanger and the condenser in sequence under the action of the fan, and is discharged through the exhaust pipe after heat exchange. The existing technology has the following defects: 1) Different models of water heaters use different exhaust methods, which will result in different exhaust pipe arrangements. Due to differences in exhaust pipe arrangements during home renovation or for aesthetic reasons, it is easy to cause inconvenience in condensate drainage; 2) Condensing gas water heaters are of the forced draft type, with intense combustion and high combustion temperature. It is easy to produce excessive nitrogen oxides during combustion. The higher the combustion temperature, the faster the nitrogen oxide generation rate and the more nitrogen oxides are produced. The high combustion temperature also increases the surface temperature of the combustion chamber shell. Excessive combustion chamber shell temperature can easily damage the electronic components near the combustion chamber shell. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a gas water heater that can effectively reduce the temperature of the combustion chamber shell and the combustion temperature of the burner, while also solving the problem of inconvenient condensate drainage.

[0004] The above-mentioned technical problems are solved by the following technical solutions:

[0005] A combustion chamber device is provided, including a combustion assembly and a heat exchange assembly. The combustion assembly includes an inner shell and a burner. A combustion chamber is disposed within the inner shell. The burner is disposed below the inner shell. The heat exchange assembly is disposed above the inner shell. The combustion assembly also includes an outer shell that surrounds the periphery of the inner shell. The outer shell and the inner shell are spaced apart to form a sealed cooling channel. The cooling channel communicates with the combustion chamber. An atomizing assembly is disposed on one side of the outer shell. The atomizing assembly is connected to the condensate pipe of the cooling channel and the heat exchange assembly, and is used to atomize the condensate in the condensate pipe and deliver it to the cooling channel.

[0006] Compared with the prior art, the combustion chamber device of the present invention has the following advantages: the high-temperature flue gas produced by the burner can flow from bottom to top along the flue in the combustion chamber and exchange heat with the heat exchange components, generating condensate. The condensate can flow out from the condensate pipe of the heat exchange components and, after being atomized by the atomizing components, can flow to the cooling channel to exchange heat with the inner and outer shells, thereby reducing the temperature of the inner and outer shells and preventing the electronic components on the outside of the adjacent combustion components from being damaged due to excessively high temperatures. At the same time, some of the atomized condensate can flow to the combustion chamber through the cooling channel. Due to the high combustion temperature in the combustion chamber, the condensate can absorb the heat of the combustion chamber and the flame and evaporate, thereby reducing the combustion temperature of the flame and reducing the generation of polluting gases. Moreover, the condensate can be discharged without the need for a drain pipe, which is beneficial for the installation of gas water heaters and effectively solves the problem of inconvenient condensate drainage.

[0007] In one embodiment, the inner shell is provided with a plurality of first through holes at intervals, and the combustion chamber is connected to the cooling channel through the first through holes.

[0008] In one embodiment, the housing is provided with a second through hole, through which the atomizing component communicates with the cooling channel. The second through hole is adjacent to the bottom of the cooling channel, and the first through hole is located above the second through hole.

[0009] In one embodiment, the atomizing component includes a housing, with the first through-hole adjacent to the top of the cooling channel.

[0010] In one embodiment, the atomizing component includes a water storage housing, an atomizing generator disposed within the water storage housing, the water storage housing having an inlet and an outlet, the inlet being connected to the condensate pipe, and the outlet being connected to the second through hole.

[0011] In one embodiment, the atomizing assembly includes an atomizing generator that is connected to both the condensate pipe and the second through hole.

[0012] In one embodiment, the atomizing assembly further includes a neutralizing component located between the atomizing generator and the condensate pipe for neutralizing the condensate.

[0013] In one embodiment, the inner shell includes a plurality of first side plates arranged at an angle, all of which are connected end-to-end to form an annular inner shell. The outer shell includes a plurality of second side plates arranged at an angle, all of which are connected end-to-end to form an annular outer shell. The first side plates are connected to the second side plates. Each of the first side plates and / or the second side plates is recessed in opposite directions to form a protrusion, thereby creating an independent cavity between the first side plate and the second side plate. A connecting channel is provided at the connection between the first side plate and the second side plate, and two adjacent cavities are connected through the connecting channel to form the cooling channel.

[0014] In one embodiment, from the cavity to the tapering portion, the connecting channel has a narrow opening and two tapering portions, the two tapering portions being located on two connected first side plates and / or two second side plates respectively, the narrow opening being located at the connection of the two first side plates and / or two second side plates, and the cross-sectional area of ​​the tapering portion being larger than the cross-sectional area of ​​the narrow opening.

[0015] In one embodiment, the cross-sectional area of ​​the tapering portion gradually increases toward the end of the narrow opening that is connected to the tapering portion away from the narrow opening. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the combustion chamber device according to an embodiment of the present invention;

[0017] Figure 2 This is a partial cross-sectional view of a combustion chamber device according to an embodiment of the present invention;

[0018] Figure 3 This is a perspective view of the combustion assembly according to an embodiment of the present invention;

[0019] Figure 4 This is an exploded view of the combustion assembly according to an embodiment of the present invention;

[0020] Figure 5 for Figure 4 Enlarged view of point A.

[0021] In the picture:

[0022] 1. Combustion assembly; 11. Inner shell; 111. First through hole; 112. First side plate; 12. Burner; 13. Combustion chamber; 14. Outer shell; 141. Second through hole; 142. Second side plate; 15. Cooling channel; 151. Cavity; 152. Connecting channel; 1521. Narrow opening; 1522. Tapered section; 2. Heat exchange assembly; 21. Condensate pipe; 3. Atomizing assembly; 31. Water storage shell; 311. Inlet; 312. Outlet; 32. Atomizer; 33. Neutralization component; 4. Protrusion. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, it should be understood that the terms "upper", "lower", "vertical", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] like Figures 1 to 4As shown, this embodiment of the invention provides a gas water heater, including a combustion assembly 1, a heat exchange assembly 2, and an atomizing assembly 3. The combustion assembly 1 includes an inner shell 11, a burner 12, and an outer shell 14. The inner shell 11 surrounds a combustion chamber 13, which has openings at the top and bottom. The combustion chamber 13 is located below the inner shell 11, allowing the flame of the burner 12 to burn within the combustion chamber 13. The combustion chamber 13 is connected to the heat exchange assembly 2 via a flue. The heat exchange assembly 2 includes a main heat exchanger (not shown) and a condensing heat exchanger, with the main heat exchanger located within the combustion chamber 13. Above, the high-temperature flue gas generated by combustion can undergo primary heat exchange through the main heat exchanger. After heat exchange, the flue gas can undergo secondary heat exchange through the condenser heat exchanger to heat water. The outer shell 14 surrounds the periphery of the inner shell 11, and the outer shell 14 and the inner shell 11 are spaced apart, forming a closed cooling channel 15 between them. The cooling channel 15 is connected to the combustion chamber 13. An atomizing component 3 is provided on one side of the outer shell 14. The atomizing component 3 is connected to the cooling channel 15 and the condensate pipe 21 of the heat exchange component 2, and is used to atomize the condensate in the condensate pipe 21 and deliver it to the cooling channel 15. The high-temperature flue gas produced by the burner 12 can flow from bottom to top along the flue in the combustion chamber 13 and exchange heat with the heat exchange component 2, producing condensate. The condensate can flow out from the condensate pipe 21 of the heat exchange component 2 and be atomized by the atomizing component 3 before flowing to the cooling channel 15 to exchange heat with the inner shell 11 and outer shell 14, thereby reducing the temperature of the inner shell 11 and outer shell 14 and preventing the electronic components on the outside of the adjacent combustion component 1 from being damaged due to excessive temperature. At the same time, the atomized condensate can also flow to the combustion chamber 13 through the cooling channel 15. Since the combustion temperature in the combustion chamber 13 is high, the condensate can absorb the heat of the combustion chamber 13 and the flame and evaporate, thereby reducing the combustion temperature of the flame and reducing the generation of polluting gases. At the same time, the condensate can be discharged without the need to install a drain pipe, which is beneficial for the installation of gas water heaters and effectively solves the problem of inconvenient condensate drainage.

[0028] Specifically, the inner shell 11 is provided with a plurality of first through holes 111 at intervals. The combustion chamber 13 is connected to the cooling channel 15 through the first through holes 111, and the first through holes 111 are located above the burner 12. By providing a plurality of first through holes 111 on the inner shell 11, the flow efficiency of condensate can be improved and the cooling effect of condensate can be accelerated.

[0029] In another embodiment, the height of the inner shell 11 is lower than the height of the outer shell 14, and the inner shell 11 and the outer shell 14 are connected by a notch, so that the atomized condensate can flow through the cooling channel 15 and from the notch to the combustion chamber 13.

[0030] Furthermore, the inner shell 11 includes multiple first side plates 112 arranged at an angle, all of which are connected end to end to form an annular inner shell 11. The outer shell 14 includes multiple second side plates 142 arranged at an angle, all of which are connected end to end to form an annular outer shell 14. Each first side plate 112 is provided with multiple first through holes 111. This design allows condensate to flow from all directions around the inner shell 11 into the combustion chamber 13, absorbing heat and cooling various areas within the combustion chamber 13. The combustion temperature is also uniform, avoiding localized high temperatures. Moreover, the atomized condensate allows the combustion temperature throughout the combustion chamber 13 to gradually decrease without sudden temperature changes, which helps improve the stability of flame combustion.

[0031] Furthermore, at least one second side plate 142 of the outer casing 14 is provided with a second through hole 141. The atomizing assembly 3 communicates with the cooling channel 15 through the second through hole 141. The second through hole 141 is adjacent to the bottom of the cooling channel 15, and the first through hole 111 is located above the second through hole 141. This design, by placing the first through hole 111 above the second through hole 141, allows condensate to flow smoothly from the second through hole 141 to the first through hole 111 and into the combustion chamber 13.

[0032] Preferably, the first through hole 111 is adjacent to the top of the cooling channel 15. This design can prolong the flow path of the atomized condensate in the cooling channel 15, thereby increasing the contact time between the atomized condensate and the inner shell 11 and the outer shell 14, improving the heat exchange effect between the atomized condensate and the inner shell 11 and the outer shell 14, and further reducing the temperature of the combustion assembly 1.

[0033] For example, the gas water heater is also equipped with a fan (not shown in the figure), which is installed above the burner 12 or the main heat exchanger. When the fan is working, under the action of negative pressure, the condensate can enter the cooling channel 15 along the inlet of the cooling channel 15 and flow into the combustion chamber 13, which is beneficial to the flow of condensate.

[0034] Specifically, the inner shell 11 and the outer shell 14 are connected by screws or welding.

[0035] For example, such as Figures 3 to 5As shown, each second side plate 142 has a protrusion 4 protruding in the direction away from the first side plate 112, and a flange is formed on the outer periphery of the second side plate 142. The flange is sealed and abuts against the first side plate 112. An independent cavity 151 is formed between the protrusion 4 and the first side plate 112. At least one cavity 151 is connected to the second through hole 141. A connecting channel 152 is provided at the abutment of the flange and the first side plate 112. Two adjacent cavities 151 are connected through the connecting channel 152 to form a cooling channel 15. This design allows the inner shell 11 and outer shell 14 to be spaced apart by the convex bulge 4. At the same time, the formed flange facilitates the connection between the inner shell 11 and outer shell 14 to seal the cavity 151. Moreover, the connecting channel 152 allows adjacent cavities 151 to be connected, so that the atomized condensate can flow along the cooling channel 15 to the circumference of the inner shell 11 and outer shell 14. Heat exchange and cooling can be carried out in all areas of the inner shell 11 and outer shell 14, thereby achieving overall cooling of the combustion assembly 1.

[0036] In another embodiment, a protrusion 4 may be provided on the first side plate 112 in a direction away from the second side plate 142, and a flange may be formed on the outer periphery of the first side plate 112. The first side plate 112 and the second side plate 142 are connected to form a cooling channel 15. Alternatively, the first side plate 112 and the second side plate 142 may be recessed and provided with the protrusion 4, which will not be described in detail here.

[0037] Specifically, a second through hole 141 is provided on the cavity 151, and each cavity 151 has a plurality of first through holes 111, so that the atomized condensate can enter one of the cavities 151 through the second through hole 141. Some of the atomized condensate can flow into the adjacent cavity 151 through the connecting channel 152, so that the atomized condensate is evenly distributed in the entire cooling channel 15. At the same time, some of the atomized condensate can also flow into the combustion chamber 13 through the first through hole 111 corresponding to each convex 4, so that the atomized condensate can flow evenly to each area of ​​the combustion chamber 13.

[0038] Preferably, such as Figure 4 As shown, in order to improve the flow efficiency of atomized condensate in the cooling channel 15, at least two connecting channels 152 are provided at the contact point between each flange and the first side plate 112, and the two connecting channels 152 are spaced apart in the vertical direction.

[0039] For example, the first side plate 112 or the second side plate 142 is formed into a protrusion 4 by stamping. The protrusion 4 formed by stamping is integrally designed with the first side plate 112 or the second side plate 142, which can improve the structural strength of the first side plate 112 and the second side plate 142 and facilitate the manufacturing and assembly of the combustion assembly 1.

[0040] Specifically, such as Figure 5As shown, the connecting channel 152 has a narrow opening 1521 and two tapering sections 1522. The two tapering sections 1522 are located on two connected second side plates 142, respectively. The narrow opening 1521 is located at the connection point of the two second side plates 142, that is, the narrow opening 1521 is located between the two tapering sections 1522. The cross-sectional area of ​​the tapering section 1522 gradually increases from the end connected to the narrow opening 1521 towards the end away from the narrow opening 1521, that is, the tapering section 1522 is funnel-shaped. This design creates a pressure difference between the cavity 151 and the tapering section 1522. As condensate flows from the cavity 151 into the tapering section 1522, the cross-sectional area through which the condensate flows gradually decreases, causing the flow rate of the condensate to gradually increase during the flow in the tapering section 1522. This allows the condensate to flow into the adjacent cavity 151 more quickly for heat exchange, enhancing the cooling effect on the combustion assembly 1.

[0041] It should be noted that the cross-sectional area refers to the cross-sectional area of ​​the connecting channel 152 enclosed by the cross-sectional contours of the first side plate 112 and the second side plate 142 after they come into contact.

[0042] Furthermore, the cross-sectional area of ​​the tapered section 1522 is larger than that of the narrow opening 1521. As the atomized condensate enters the cavity 151 through the second through-hole 141 and passes through the connecting channel 152, it first enters the tapered section 1522 and then the narrow opening 1521. Because the cross-sectional area of ​​the tapered section 1522 is larger than that of the narrow opening 1521, a pressure difference is also formed as the condensate flows from the tapered section 1522 to the narrow opening 1521, further increasing the flow rate of the condensate and enhancing the cooling effect on the combustion assembly 1.

[0043] For example, such as Figure 2 As shown, the atomizing component 3 includes a water storage housing 31, an atomizing generator 32 is disposed inside the water storage housing 31, and the water storage housing 31 is provided with an outlet 312 and an inlet 311 arranged at an angle for installation.

[0044] The inlet 311 is located at the top of the water storage shell 31, and the outlet 312 is adjacent to the top of the water storage shell 31. The inlet 311 is connected to the condensate pipe 21 through a connecting pipe, allowing condensate to enter the water storage shell 31 from the inlet 311. The outlet 312 is connected to the second through hole 141 through a connecting pipe, allowing atomized condensate to exit through the outlet 312. The water storage shell 31 can collect and store excess condensate. When it is necessary to cool the combustion assembly 1, the atomizing assembly 3 can atomize the condensate and evaporate the condensate in the water storage shell 31.

[0045] Specifically, the atomizing component 3 is an ultrasonic atomizer or a compressor atomizer, and the atomizing generator 32 is connected to the controller of the gas water heater to control the operation of the atomizing component 3.

[0046] Furthermore, a neutralization component 33 is also provided inside the water storage shell 31. The neutralization component 33 is used to neutralize the condensate. Since acidic gases such as carbon dioxide and nitrogen oxides in high-temperature flue gas will dissolve in the condensate, making the condensate acidic, the acidic condensate will corrode the atomizing component 3. By setting the neutralization component 33, the condensate can be neutralized, reducing the acidity of the condensate. Moreover, the polluting gases generated after the neutralized condensate enters the combustion chamber 13 for evaporation treatment will also be greatly reduced.

[0047] Preferably, in order to improve the neutralization reaction efficiency, the neutralization component 33 is a magnesium rod.

[0048] For example, a liquid level sensor (not shown in the figure) is also installed inside the water storage shell 31. The liquid level sensor is connected to the controller and is used to detect the water level inside the water storage shell 31. When the condensate in the water storage shell 31 reaches the threshold, the controller can control the atomizer 32 to work so that the condensate is atomized and discharged.

[0049] In another embodiment, the atomizing component 3 includes an atomizing generator 32. The inlet of the atomizing generator 32 is connected to the outlet of the condensate pipe 21 via a connecting pipe, and the atomizing port of the atomizing generator 32 is connected to the second through hole 141 via a connecting pipe. This design allows the atomized condensate to directly enter the cooling channel 15 from the second through hole 141, improving the efficiency of condensate entering the cooling channel 15.

[0050] Specifically, the neutralizing component 33 is installed between the outlet of the condensate pipe 21 and the inlet of the atomizer 32 to neutralize the acidity of the condensate that directly enters the atomizer 32.

[0051] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0052] The specific embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A gas water heater, comprising a combustion assembly (1) and a heat exchange assembly (2), wherein the combustion assembly (1) comprises an inner shell (11) and a burner (12), a combustion chamber (13) is provided inside the inner shell (11), the burner (12) is disposed below the inner shell (11), and the heat exchange assembly (2) is disposed above the inner shell (11), characterized in that, The combustion assembly (1) also includes a shell (14) which surrounds the periphery of the inner shell (11). The shell (14) and the inner shell (11) are spaced apart, forming a sealed cooling channel (15) between them. The cooling channel (15) is connected to the combustion chamber (13). An atomizing assembly (3) is provided on one side of the shell (14). The atomizing assembly (3) is connected to the cooling channel (15) and the condensate pipe (21) of the heat exchange assembly (2), and is used to atomize the condensate in the condensate pipe (21) and deliver it to the cooling channel (15). The inner shell (11) is provided with a plurality of first through holes (111) at intervals, and the combustion chamber (13) is connected to the cooling channel (15) through the first through holes (111).

2. The gas water heater according to claim 1, characterized in that, The outer shell (14) is provided with a second through hole (141), and the atomizing component (3) is connected to the cooling channel (15) through the second through hole (141). The second through hole (141) is adjacent to the bottom of the cooling channel (15), and the first through hole (111) is located above the second through hole (141).

3. The gas water heater according to claim 2, characterized in that, The first through hole (111) is adjacent to the top of the cooling channel (15).

4. The gas water heater according to claim 2, characterized in that, The atomizing component (3) includes a water storage shell (31), in which an atomizing generator (32) is provided. The water storage shell (31) is provided with an inlet (311) and an outlet (312). The inlet (311) is connected to the condensate pipe (21), and the outlet (312) is connected to the second through hole (141).

5. The gas water heater according to claim 2, characterized in that, The atomizing component (3) includes an atomizing generator (32), which is connected to the condensate pipe (21) and the second through hole (141) respectively.

6. The gas water heater according to claim 4 or 5, characterized in that, The atomizing component (3) also includes a neutralizing component (33), which is located between the atomizing generator (32) and the condensate pipe (21) for neutralizing the condensate.

7. The gas water heater according to any one of claims 1 to 5, characterized in that, The inner shell (11) includes a plurality of first side plates (112) arranged at an angle, and all the first side plates (112) are connected end to end to form an annular inner shell (11). The outer shell (14) includes a plurality of second side plates (142) arranged at an angle, and all the second side plates (142) are connected end to end to form an annular outer shell (14). The first side plates (112) are connected to the second side plates (142). Each first side plate (112) and / or second side plate (142) is recessed with a protrusion (4) in a direction opposite to each other, so that an independent cavity (151) is formed between the first side plate (112) and the second side plate (142). A connecting channel (152) is provided at the connection between the first side plate (112) and the second side plate (142). Two adjacent cavities (151) are connected through the connecting channel (152) to form the cooling channel (15).

8. The gas water heater according to claim 7, characterized in that, The connecting channel (152) has a narrow opening (1521) and two tapered sections (1522), the two tapered sections (1522) are respectively located on two connected first side plates (112) and / or two second side plates (142), the narrow opening (1521) is located at the connection of the two first side plates (112) and / or two second side plates (142), and the cross-sectional area of ​​the tapered section (1522) is larger than the cross-sectional area of ​​the narrow opening (1521).

9. The gas water heater according to claim 8, characterized in that, The cross-sectional area of ​​the tapered portion (1522) gradually increases from one end connected to the narrow opening (1521) toward the end of the tapered portion (1522) away from the narrow opening (1521).

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