Combustion device and gas water heater

Abstract

The utility model relates to the technical field of gas water heaters, in particular to a combustion device and a gas water heater. The combustion device comprises a shell defining a combustion chamber, the shell comprises an inner shell and an outer shell arranged on the outer side of the inner shell in a sleeving mode, and the inner shell comprises two oppositely-arranged first inner side plates and two oppositely-arranged second inner side plates. The shell comprises two oppositely arranged first outer side plates and two oppositely arranged second outer side plates. The first inner side plate and the corresponding first outer side plate form a first air cooling channel, the second inner side plate and the corresponding second outer side plate form a second air cooling channel, the top of the first air cooling channel communicates with the top of the adjacent second air cooling channel, and an air inlet is formed in the bottom of the first air cooling channel. An air outlet hole right opposite to the combustion chamber is formed in the bottom of the second air cooling channel. The gas water heater comprises the combustion device, the air flowing path is prolonged, and the air cooling effect is improved. And meanwhile, the whole machine performance and the mute noise reduction effect of the combustion device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, in particular to a combustion device and a gas water heater. Background Art

[0002] When a gas water heater is working, the high-temperature flue gas will cause the temperature of the outer wall of the combustion chamber to rise sharply, which will damage the electronic components around the combustion chamber. Therefore, the combustion device usually uses an air-cooled combustion chamber to achieve cooling.

[0003] Conventional combustion chambers form an air cooling channel between the inner and outer shells, and are equipped with numerous air intake holes to ensure air flow into the channel. However, most of the air in the channel flows out without participating in combustion and mixes with the high-temperature flue gas in the combustion chamber, affecting combustion conditions within the combustion chamber and reducing the overall performance of the combustion device. Furthermore, the noise generated by the burner diffuses outward through the air intake holes, increasing the noise level of the combustion device. Utility Model Content

[0004] One of the technical problems solved by the present invention is to provide a combustion device that can effectively solve the technical problems in the prior art that most of the air in the air-cooling channel does not participate in combustion, resulting in a decrease in the overall performance of the combustion device and the combustion device making a lot of noise.

[0005] The second technical problem solved by the present invention is to provide a gas water heater that can effectively solve the technical problems in the prior art that most of the air in the air-cooling channel does not participate in combustion, resulting in a decrease in the overall performance of the combustion device and the combustion device making a lot of noise.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A combustion device includes a shell that encloses a combustion chamber, the shell including an inner shell and an outer shell sleeved on the outer side of the inner shell, the inner shell including two oppositely disposed first inner plates and two oppositely disposed second inner plates, the first inner plates being disposed adjacent to the second inner plates; the outer shell including two oppositely disposed first outer plates and two oppositely disposed second outer plates, the first outer plates being disposed adjacent to the second outer plates;

[0008] The first inner plate and the corresponding first outer plate form a first air-cooling channel, the second inner plate and the corresponding second outer plate form a second air-cooling channel, the top of the first air-cooling channel is connected to the top of the adjacent second air-cooling channel, the bottom of the first air-cooling channel is provided with an air inlet, and the bottom of the second air-cooling channel is provided with an air outlet facing the combustion chamber.

[0009] Compared with the background technology, the combustion device described in the utility model has the following beneficial effects:

[0010] The shell has two oppositely arranged first air-cooling channels and two oppositely arranged second air-cooling channels, and the top of the first air-cooling channel is connected to the top of the adjacent second air-cooling channel, so that after the external air enters the first air-cooling channel through the air inlet, it enters the two second air-cooling channels from the top of the first air-cooling channel, and finally flows into the combustion chamber from the air outlet at the bottom of the second air-cooling channel and participates in the combustion. This not only simplifies the structure of the shell, but also extends the flow path of the air in the air-cooling channel and improves the air-cooling and cooling effect. At the same time, the air after passing through the air-cooling channel enters the combustion chamber and participates in the combustion, thereby improving the overall performance of the combustion device. Because the air inlet and the air outlet are located at different positions of the shell, the propagation path of the noise in the shell is tortuous and complex and has a long length, which weakens the propagation energy of the noise and improves the quiet noise reduction effect.

[0011] In one embodiment, a spoiler is provided on the inner side of each of the first air-cooling channel and the second air-cooling channel.

[0012] In one embodiment, the first inner plate protrudes toward the interior of the first air-cooling channel to form a plurality of the spoilers; the second inner plate protrudes toward the interior of the second air-cooling channel to form a plurality of the spoilers.

[0013] In one embodiment, the spoiler is a hemispherical convex hull.

[0014] In one embodiment, a guide portion is provided on the inner side of the top of the second air-cooling channel, the connecting opening between the adjacent first air-cooling channel and the second air-cooling channel is arranged opposite to the corresponding guide portion, and the guide portion is located above the spoiler.

[0015] In one embodiment, the second inner plate protrudes toward the interior of the second air-cooling channel to form the guide portion.

[0016] In one embodiment, first holes communicating with corresponding first air-cooling channels are provided on both sides of the top of the first inner side plate along its length direction, and second holes communicating with corresponding second air-cooling channels are provided on both sides of the top of the second inner side plate along its length direction; the two first holes of the first inner side plate are respectively communicated with the second holes of the two adjacent second inner side plates in a one-to-one correspondence, so that the top of the first air-cooling channel is respectively communicated with the top of the two adjacent second air-cooling channels.

[0017] In one embodiment, a plurality of air outlet holes are provided at intervals along the length of the bottom of the first inner plate.

[0018] In one embodiment, the plurality of air outlet holes are arranged at intervals along an arc line with a high middle and low ends.

[0019] The second technical problem mentioned above is solved by the following technical solution:

[0020] A gas water heater comprises the above-mentioned combustion device.

[0021] Compared with the background technology, the gas water heater described in the utility model has the following beneficial effects:

[0022] The shell has two oppositely arranged first air-cooling channels and two oppositely arranged second air-cooling channels, and the top of the first air-cooling channel is connected to the top of the adjacent second air-cooling channel, so that after the external air enters the first air-cooling channel through the air inlet, it enters the two second air-cooling channels from the top of the first air-cooling channel, and finally flows into the combustion chamber from the air outlet at the bottom of the second air-cooling channel and participates in the combustion. This not only simplifies the structure of the shell, but also extends the flow path of the air in the air-cooling channel and improves the air-cooling and cooling effect. At the same time, the air after passing through the air-cooling channel enters the combustion chamber and participates in the combustion, thereby improving the overall performance of the combustion device. Because the air inlet and the air outlet are located at different positions of the shell, the propagation path of the noise in the shell is tortuous and complex and has a long length, which weakens the propagation energy of the noise and improves the quiet noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a combustion device provided by an embodiment of the present utility model;

[0024] Figure 2 This is a schematic structural diagram of a housing provided by an embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the structural decomposition of the housing provided by an embodiment of the present utility model;

[0026] Figure 4 This is a schematic structural diagram of the enclosure provided by an embodiment of the present utility model;

[0027] Figure 5 This is a schematic structural diagram of the inner shell provided by an embodiment of the present utility model;

[0028] Figure 6 This is a cross-sectional view of the structure of the housing provided by the embodiment of the utility model Figure 1 ;

[0029] Figure 7 This is a cross-sectional view of the structure of the housing provided by the embodiment of the utility model Figure 2 .

[0030] The names and numbers of the components in the figure are as follows:

[0031] 10. Housing; 101. First air-cooling channel; 102. Second air-cooling channel; 103. Air inlet; 104. Air outlet; 20. Burner; 30. Fan assembly; 40. Heat exchanger;

[0032] 1. Inner shell; 11. First inner plate; 111. First hole; 12. Second inner plate; 121. Second hole; 13. Spoiler; 14. Air guide; 2. Outer shell; 21. First outer plate; 22. Second outer plate. DETAILED DESCRIPTION

[0033] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of it.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] like Figure 1 As shown, this embodiment provides a gas water heater comprising a combustion device, a fan assembly 30, and a heat exchanger 40. The combustion device comprises a housing 10 enclosing a combustion chamber and a burner 20 mounted within the housing 10. The burner 20 generates high-temperature flue gas by burning gas within the combustion chamber. The high-temperature flue gas exchanges heat with the heat exchange tubes as it passes through the heat exchanger 40. The fan in the fan assembly 30 discharges the heat-exchanged flue gas outside the gas water heater through a fume hood.

[0039] Conventional combustion chambers form an air cooling channel between the inner and outer shells, and are equipped with numerous air intake holes to ensure air flow into the channel. However, most of the air in the channel flows out without participating in combustion and mixes with the high-temperature flue gas in the combustion chamber, affecting combustion conditions within the combustion chamber and reducing the overall performance of the combustion device. Furthermore, the noise generated by the burner diffuses outward through the air intake holes, increasing the noise level of the combustion device.

[0040] To solve the above problems, Figures 1 to 3 As shown, this embodiment also proposes a combustion device, wherein the shell 10 includes an inner shell 1 and an outer shell 2 mounted on the outer side of the inner shell 1. The inner shell 1 includes two oppositely arranged first inner panels 11 and two oppositely arranged second inner panels 12, wherein the first inner panels 11 and the second inner panels 12 are arranged adjacent to each other. The outer shell 2 includes two oppositely arranged first outer panels 21 and two oppositely arranged second outer panels 22, wherein the first outer panels 21 and the second outer panels 22 are arranged adjacent to each other. The first inner panel 11 and the corresponding first outer panel 21 form a first air-cooling channel 101, and the second inner panel 12 and the corresponding second outer panel 22 form a second air-cooling channel 102. The top of the first air-cooling channel 101 is connected to the top of the adjacent second air-cooling channel 102. The bottom of the first air-cooling channel 101 is provided with an air inlet 103, and the bottom of the second air-cooling channel 102 is provided with an air outlet 104 facing the combustion chamber.

[0041] There are two oppositely arranged first air-cooling channels 101 and two oppositely arranged second air-cooling channels 102 in the shell 10, and the top of the first air-cooling channel 101 is connected to the top of the adjacent second air-cooling channel 102, so that after the external air enters the two first air-cooling channels 101 through the air inlet 103, it enters the two second air-cooling channels 102 from the top of the first air-cooling channel 101, and finally flows into the combustion chamber from the air outlet 104 at the bottom of the second air-cooling channel 102 and participates in the combustion. This not only simplifies the structure of the shell 10, but also extends the air flow path in the shell 10, thereby improving the air cooling effect. At the same time, the air after passing through the air-cooling channel enters the combustion chamber and participates in the combustion, thereby improving the overall performance of the combustion device. Because the air inlet 103 and the air outlet 104 are located at different positions in the shell 10, the propagation path of the noise in the shell 10 is tortuous, complex and long, which weakens the propagation energy of the noise and improves the quiet noise reduction effect.

[0042] like Figure 3 and Figure 4 As shown, the housing 10 is a rectangular shell assembled by a panel and a cover. The panel includes two first outer panels 21, a second outer panel 22, two first inner panels 11 and a second inner panel 12. The left and right sides of the second outer panel 22 are respectively connected to a first outer panel 21 in an integral U shape (as shown in FIG. Figure 4 As shown). The two first inner panels 11 are respectively installed on the inner sides of the corresponding first outer panels 21 to form a first air-cooling channel 101 on the left and right sides of the enclosure, and the air inlet 103 of the first air-cooling channel 101 is set downward. A second inner panel 12 is installed on the inner side of the second outer panel 22 in the enclosure to form a second air-cooling channel 102 on the rear side of the enclosure. The cover plate includes another second inner panel 12 and another second outer panel 22, and the second inner panel 12 is installed on the inner side of the second outer panel 22 to form a second air-cooling channel 102. Therefore, the left and right sides of the shell 10 both have the first air-cooling channel 101, and the front and rear sides of the shell 10 both have the second air-cooling channel 102, and the top of each first air-cooling channel 101 is respectively connected to the tops of the two adjacent second air-cooling channels 102, so that air can flow along Figure 2 The direction indicated by the arrows is the flow in multiple air cooling channels.

[0043] like Figure 3 and Figure 5As shown, the top of the first inner panel 11 is provided with first holes 111 on both sides along its length (front-to-back direction in the figure), which are connected to the corresponding first air-cooling channels 101. The top of the second inner panel 12 is provided with second holes 121 on both sides along its length (left-to-right direction in the figure), which are connected to the corresponding second air-cooling channels 102. The two first holes 111 of the first inner panel 11 are connected to the second holes 121 of the two adjacent second inner panels 12 in a one-to-one correspondence, so that the top of the first air-cooling channel 101 is connected to the top of the two adjacent second air-cooling channels 102. By providing the first holes 111 and the second holes 121, smooth air flow is achieved within each air-cooling channel.

[0044] like Figure 6 and Figure 7 As shown, the inner sides of the first air-cooling channel 101 and the second air-cooling channel 102 are both provided with a spoiler 13. By providing the spoiler 13, the air in the first air-cooling channel 101 and the second air-cooling channel 102 is disturbed (or diverted), so that the air flows evenly in the air-cooling channel, ensuring uniform heat dissipation of the housing 10. At the same time, the flow path of the air in the air-cooling channel is made more tortuous, further extending the flow time of the air in the air-cooling channel, increasing the contact area between the air and the inner wall of the air-cooling channel, and improving the air-cooling and cooling effect. In addition, when noise propagates in the air-cooling channel, it collides with the spoiler 13. After being blocked by the spoiler 13, the propagation energy of the noise is greatly weakened, further improving the quiet noise reduction effect.

[0045] Specifically, the first inner panel 11 protrudes toward the interior of the first air-cooling channel 101 to form a plurality of spoilers 13. The second inner panel 12 protrudes toward the interior of the second air-cooling channel 102 to form a plurality of spoilers 13. The first inner panel 11 and the second inner panel 12 are both integrally formed with the plurality of spoilers 13, which reduces the difficulty of manufacturing the spoilers 13 and simultaneously maintains a flat outer surface for the first outer panel 21 and the second outer panel 22, thereby improving the neatness and aesthetics of the housing 2.

[0046] It should be noted that the first and second inner panels 11, 12 have raised spoilers 13 on the sides facing the air cooling channel, while the sides facing the combustion chamber are recessed to form grooves. The heat radiation generated during combustion undergoes multiple refractions within the grooves, improving the thermal radiation utilization rate and flue gas index margin of the combustion device, thereby enhancing the overall performance of the combustion device. Furthermore, the multiple reflections of noise within the grooves further weaken the propagation energy, thereby enhancing the quieting and noise reduction effect of the housing 10.

[0047] In one embodiment, the spoiler 13 is a hemispherical convex hull, which is easy to manufacture and reduces the cost of the housing 10. In other embodiments, the spoiler 13 can also be an elliptical convex hull or a convex hull of another shape, as long as it can provide a spoiler. Multiple hemispherical convex hulls are evenly distributed on the first inner plate 11 and the second inner plate 12 to ensure uniform air flow within the cooling channel, while also slowing the air flow rate, increasing the contact area between the air and the inner wall of the cooling channel, and improving the cooling effect.

[0048] In one embodiment, Figure 5 and Figure 6 As shown, a guide portion 14 is provided on the inner side of the top of the second air-cooling channel 102. The communication opening between the adjacent first air-cooling channel 101 and the second air-cooling channel 102 is arranged opposite the corresponding guide portion 14, and the guide portion 14 is located above the spoiler 13. When the air in the first air-cooling channel 101 enters the second air-cooling channel 102, the air flows smoothly toward the spoiler 13 below the guide portion 14 under the action of the guide portion 14, achieving a good guiding effect.

[0049] Specifically, the second inner panel 12 protrudes toward the interior of the second air-cooling channel 102 to form a guide portion 14. By integrally molding the guide portion 14 on the second inner panel 12, the processing difficulty of the guide portion 14 is reduced, while maintaining a flat outer surface for the first and second outer panels 21, 22, improving the neatness and aesthetics of the outer shell 2. It should be noted that the guide portion 14 also forms a groove by recessing the side of the second inner panel 12 facing the combustion chamber. This improves the thermal radiation utilization rate of the combustion device and the margin of the flue gas index, further enhancing the quieting and noise reduction effect of the outer shell 10.

[0050] The bottom of the guide portion 14 of this embodiment has an arc-shaped guide surface with a lower middle and higher ends. The guide surface is along the length direction of the second inner plate 12 ( Figure 6 The left and right sides of the guide surface extend to the connecting port between the adjacent first air cooling channel 101 and the second air cooling channel 102, respectively, so that the air entering the second air cooling channel 102 through the connecting port can be guided along the guide surface under the guiding effect of the guide surface. Figure 6 The direction indicated by the middle arrow is toward the spoiler 13 below.

[0051] like Figure 6 and Figure 7 As shown, the bottom of the first inner plate 11 is provided with a plurality of air outlet holes 104 spaced apart along its length (left and right in the figure). The plurality of air outlet holes 104 are spaced apart to increase the air delivery rate and to evenly deliver air into the combustion chamber, thereby improving combustion uniformity.

[0052] Specifically, the outside air Figure 6 As shown by the middle arrow, the air enters the first cooling channel 101 from the air inlet 103 at the bottom of the first cooling channel 101, then flows from bottom to top, and then flows from the top of the first cooling channel 101 into the second cooling channel 102. Figure 7 As indicated by the middle arrow, air continues to flow downward through the second cooling channel 102, guided by the air guide 14, ultimately flowing into the combustion chamber through the air outlet 104 at the bottom of the second cooling channel 102 to participate in combustion. This air flows upward through the first cooling channel 101 and then downward through the second cooling channel 102, extending the air flow path within the cooling channel and enhancing the cooling effect. This also complicates and lengthens the noise propagation path, achieving excellent noise reduction.

[0053] like Figure 6 As shown, multiple air outlets 104 are spaced apart along an arc with a higher center and lower ends. This arrangement allows the higher center air outlets 104 to face the outer flames of the center fire grate, enhancing combustion performance. The lower left and right air outlets 104 face the center and inner flames of the edge fire grate, drawing the edge fire grate flames closer to the center, improving the combustion of the burner 20 and enhancing its combustion performance.

[0054] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications are possible without departing from the spirit and scope of the present invention. Such changes and modifications are within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A combustion device, characterized in that: The invention comprises a shell (10) that encloses a combustion chamber, wherein the shell (10) comprises an inner shell (1) and an outer shell (2) that is sleeved on the outer side of the inner shell (1), wherein the inner shell (1) comprises two first inner side plates (11) that are arranged opposite to each other and two second inner side plates (12) that are arranged opposite to each other, and wherein the first inner side plates (11) and the second inner side plates (12) are arranged adjacent to each other; and wherein the outer shell (2) comprises two first outer side plates (21) that are arranged opposite to each other and two second outer side plates (22) that are arranged opposite to each other, and wherein the first outer side plates (21) and the second outer side plates (22) are arranged adjacent to each other; The first inner plate (11) and the corresponding first outer plate (21) form a first air-cooling channel (101), and the second inner plate (12) and the corresponding second outer plate (22) form a second air-cooling channel (102). The top of the first air-cooling channel (101) is connected to the top of the adjacent second air-cooling channel (102). The bottom of the first air-cooling channel (101) is provided with an air inlet (103), and the bottom of the second air-cooling channel (102) is provided with an air outlet (104) facing the combustion chamber.

2. The combustion device according to claim 1, characterized in that A spoiler (13) is provided on the inner sides of both the first air cooling channel (101) and the second air cooling channel (102).

3. The combustion device according to claim 2, characterized in that The first inner plate (11) protrudes toward the interior of the first air-cooling channel (101) to form a plurality of spoilers (13); the second inner plate (12) protrudes toward the interior of the second air-cooling channel (102) to form a plurality of spoilers (13).

4. The combustion device according to claim 3, characterized in that The spoiler (13) is a hemispherical convex hull.

5. The combustion device according to claim 2, characterized in that: A guide portion (14) is provided on the inner side of the top of the second air-cooling channel (102); the communication opening between the adjacent first air-cooling channel (101) and the second air-cooling channel (102) is arranged opposite to the corresponding guide portion (14), and the guide portion (14) is located above the spoiler (13).

6. The combustion device according to claim 5, characterized in that The second inner plate (12) protrudes toward the interior of the second air-cooling channel (102) to form the guide portion (14).

7. The combustion device according to any one of claims 1 to 6, characterized in that: The top of the first inner side plate (11) is provided with first holes (111) on both sides along its length direction, which are connected to the corresponding first air-cooling channel (101); the top of the second inner side plate (12) is provided with second holes (121) on both sides along its length direction, which are connected to the corresponding second air-cooling channel (102); the two first holes (111) of the first inner side plate (11) are respectively connected to the second holes (121) of the two adjacent second inner side plates (12) in a one-to-one correspondence, so that the top of the first air-cooling channel (101) is respectively connected to the tops of the two adjacent second air-cooling channels (102).

8. The combustion device according to any one of claims 1 to 6, characterized in that: The bottom of the first inner plate (11) is provided with a plurality of air outlet holes (104) spaced apart along its length.

9. The combustion device according to claim 8, characterized in that: The plurality of air outlet holes (104) are arranged at intervals along an arc line with a high middle and low ends.

10. Gas water heater, characterized in that A combustion device comprising the combustion device according to any one of claims 1 to 9.

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