Air-cooled water heater

Abstract

The utility model discloses an air-cooled water heater. The air-cooled water heater comprises a combustor, a combustion chamber, a heat exchanger and a fan assembly which are arranged from bottom to top, the air-cooled water heater further comprises a water pipe flowing through the heat exchanger, a switch valve assembly is arranged on the water pipe, the combustion chamber comprises an inner shell and an outer shell, a connecting structure is arranged between the inner shell and the outer shell, a gap is formed between the inner shell and the outer shell, a first air inlet hole is formed in the outer shell and is formed beside the connecting structure, and a first air inlet channel is formed in the inner shell and is communicated with the first air inlet channel. A fire outlet of the combustor communicates with an opening in the lower end of the combustion chamber, an air inlet of the draught fan assembly communicates with an opening in the upper end of the combustion chamber, when the draught fan assembly sucks smoke, air enters from the first air inlet hole and can take away part of heat of the connecting structure, and therefore the heat accumulation problem at the position is reduced, and meanwhile air flows in the gap to form air cooling; therefore, the service life of the water heater is prolonged, and the use reliability of the water heater is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an air-cooled water heater. Background Art

[0002] At present, water heaters are household appliances commonly used in people's daily lives. Water heaters are generally divided into gas water heaters and electric water heaters. Among them, gas water heaters are widely used because of their fast heating speed and good heating stability. Conventional gas water heaters usually include burners, combustion chambers, heat exchangers, fans and other components. The burner burns gas in the combustion chamber to heat the water flowing through the heat exchanger.

[0003] Gas water heaters on the market are usually water-cooled. However, in actual use, the heat exchange tubes are easily affected by water quality and corroded. At the same time, the location where the combustion chamber is connected through the connector causes the heat accumulation of the connector, resulting in excessive temperature in the local area, which makes the local area vulnerable to damage, resulting in reduced service life and reliability of the gas water heater.

[0004] The utility model is made based on the above situation. Utility Model Content

[0005] The utility model overcomes the shortcomings of the prior art and provides an air-cooled water heater which can reduce local heat accumulation in a combustion chamber.

[0006] The utility model is realized by the following technical solutions:

[0007] A wind-cooled water heater comprises a burner, a combustion chamber, a heat exchanger and a fan assembly arranged from bottom to top; the wind-cooled water heater also comprises a water pipe flowing through the heat exchanger, the water pipe is provided with a switch valve assembly, the combustion chamber comprises an inner shell with upper and lower openings and an outer shell sleeved on the outer side of the inner shell, a connecting structure for connecting the inner shell and the outer shell is provided between the inner shell and the outer shell, a gap is also provided between the inner shell and the outer shell, a plurality of first air inlet holes for allowing outside air to flow into the gap are provided on the outer shell, the first air inlet holes are arranged next to the connecting structure, the inner shell is provided with a first air inlet channel for allowing wind in the gap to enter the inner cavity of the inner shell, the fire outlet of the burner is connected to the lower end opening of the combustion chamber, and the air inlet of the fan assembly is connected to the upper end opening of the combustion chamber.

[0008] In the air-cooled water heater as described above, the connection structure includes mounting holes provided on the outer shell and the inner shell, and a connection component that cooperates with the mounting holes to connect the outer shell and the inner shell.

[0009] In the air-cooled water heater as described above, the connection assembly includes bolts and nuts, and positions corresponding to the mounting holes on the inner shell and the outer shell are provided with embedding grooves for embedding nuts or nuts of the bolts.

[0010] In the air-cooled water heater as described above, the first air inlet hole is arranged beside the embedding groove.

[0011] In the air-cooled water heater as described above, a wind guide structure for causing wind to flow upward along the inner wall of the inner shell is provided at a position on the inner side of the inner shell corresponding to the first air inlet channel.

[0012] In the air-cooled water heater as described above, the air guide structure includes an upwardly inclined guide slope.

[0013] In the air-cooled water heater as described above, the shell is further provided with a plurality of second air inlet channels for letting air into the gaps.

[0014] In the air-cooled water heater as described above, the fan assembly includes a smoke hood and a fan, the motor used on the fan is a variable speed motor, and the variable speed motor is provided with a sensor that can sense the resistance encountered by the fan when it is working and then adjust the speed of the variable speed motor.

[0015] In the air-cooled water heater as described above, the burner is sealedly connected to the combustion chamber, the upper end of the heat exchanger is sealedly connected to the fan assembly, and the lower end of the heat exchanger is sealedly connected to the combustion chamber.

[0016] In the air-cooled water heater as described above, each side wall of the outer shell is provided with a plurality of second air inlet channels, and each side wall of the inner shell is provided with a first air inlet channel.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. In this case, a gap is provided between the inner shell and the outer shell, and a plurality of first air inlet holes are provided on the outer shell to allow outside air to flow into the gap. The first air inlet holes are provided next to the connecting structure. When the fan assembly is extracting smoke, air enters from the first air inlet holes and takes away part of the heat of the connecting structure, thereby reducing the heat accumulation problem there. At the same time, wind flows in the gap to form air cooling, which cools down the surface of the combustion chamber, thereby increasing the service life of the water heater and reducing its reliability.

[0019] 2. The positions of the inner shell and the outer shell corresponding to the mounting holes are provided with embedding grooves for bolts or nuts to embed, thereby reducing the installation space of the inner shell and the outer shell and making the structure more compact.

[0020] 3. An air guide structure for allowing wind to flow upward along the inner wall of the inner shell is provided at a position on the inner side of the inner shell corresponding to the first air inlet channel. The air guide structure allows wind to flow upward along the inner wall of the inner shell to form an air-cooled barrier, thereby further cooling the surface of the combustion chamber.

[0021] 4. The motor used on the fan is a variable speed motor, which is equipped with a sensor that can sense the resistance encountered by the fan when it is working and then adjust the speed of the variable speed motor. The sensor obtains external resistance to judge the amount of air required for combustion, thereby changing the speed of the motor to maintain combustion stability and ensure that the temperature of the combustion chamber surface is maintained within a reasonable range.

[0022] 5. Multiple second air inlet channels are provided on each side wall of the outer shell, and a first air inlet channel is provided on each side wall of the inner shell, so as to dissipate heat from each surface of the combustion chamber and balance the temperature of each surface of the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0026] Figure 3 It is a cross-sectional view of the utility model;

[0027] Figure 4 It is a structural schematic diagram of the combustion chamber in the utility model;

[0028] Figure 5 It is an exploded schematic diagram of the combustion chamber in the utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the burner in the utility model. Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the structure of the burner in the utility model. Figure 2 ;

[0031] Figure 8 It is a partial cross-sectional view of the utility model. DETAILED DESCRIPTION

[0032] The utility model is further described below in conjunction with the accompanying drawings:

[0033] like Figures 1 to 8The air-cooled water heater shown in the figure comprises a burner 2, a combustion chamber 3, a heat exchanger 5 and a fan assembly 4 arranged from bottom to top; the air-cooled water heater also comprises a water pipe 1 flowing through the heat exchanger 5, the water pipe 1 is provided with a switch valve assembly, the combustion chamber 3 comprises an inner shell 31 with upper and lower openings and an outer shell 32 sleeved on the outer side of the inner shell 31, a connecting structure for connecting the inner shell 31 and the outer shell 32 is provided between the inner shell 31 and the outer shell 32, a gap 6 is also provided between the inner shell 31 and the outer shell 32, a plurality of first air inlet holes 321 for allowing outside air to flow into the gap 6 are provided on the outer shell 32, the first air inlet holes 321 are provided next to the connecting structure, the inner shell 31 is provided with a first air inlet channel 311 for allowing wind in the gap 6 to enter the inner cavity of the inner shell 31, the fire outlet of the burner 2 is communicated with the lower end opening of the combustion chamber 3, and the air inlet of the fan assembly 4 is communicated with the upper end opening of the combustion chamber 3.

[0034] A gap 6 is also provided between the inner shell 31 and the outer shell 32. The outer shell 32 is provided with a plurality of first air inlet holes 321 that allow outside air to flow into the gap 6. The first air inlet holes 321 are provided next to the connecting structure. When the fan assembly 4 is smoking, air enters the gap 6 from the first air inlet holes 321 and takes away part of the heat of the connecting structure, thereby reducing the heat accumulation problem there. At the same time, wind flows in the gap 6 to form wind cooling, which cools the surface of the combustion chamber, thereby increasing the service life of the water heater and reducing its reliability.

[0035] In one embodiment, the burner 2 is sealed to the combustion chamber 3 via threaded fasteners and a sealing ring, the upper end of the heat exchanger 5 is sealed to the fan assembly 4 via threaded fasteners and a sealing ring, and the lower end of the heat exchanger 5 is sealed to the combustion chamber 3 via threaded fasteners and a sealing ring.

[0036] The above-mentioned connection structure includes a mounting hole 71 provided on the outer shell 32 and the inner shell 31, and a connection component 72 that cooperates with the mounting hole 71 to connect the outer shell 32 and the inner shell 31. The connection component 72 may be a bolt 721 and a nut 722. The positions of the inner shell 31 and the outer shell 32 corresponding to the mounting hole 71 are provided with an embedding groove 70 for the nut 721 or the nut 722 to be embedded, thereby reducing the installation space of the inner shell and the outer shell and making the structure more compact. The embedding groove 70 is pressed inward, and at the same time, the contact area with the wind is increased, thereby accelerating heat dissipation.

[0037] The first air inlet 321 is disposed beside the embedding groove 70. The first air inlet 321 may be disposed around the embedding groove 70. In one embodiment, the combustion chamber 3 is rectangular, and the outer shell 32 and the inner shell 31 are provided with connecting structures on four sides.

[0038] An air guide structure 312 is provided at the position of the inner side of the inner shell 31 corresponding to the first air inlet channel 311, which is used to make the wind flow upward along the inner wall of the inner shell 31. The air guide structure 312 may be an upwardly inclined guide slope or guide arc surface, through which the wind flows upward along the inner wall of the inner shell 31 to form an air-cooled barrier, thereby further cooling the surface of the combustion chamber and reducing the heat dissipation to the inner shell 31 and the outer shell 32.

[0039] The outer shell 32 is also provided with a plurality of second air inlet channels 322 for letting air into the gap 6. The outer shell 32 is provided with a plurality of second air inlet channels 322 on each side wall, the inner shell 31 is provided with a first air inlet channel 311 on each side wall, the upper, middle and lower parts of the outer shell 32 are provided with second air inlet channels 322, and the upper, middle and lower parts of the inner shell 31 are provided with first air inlet channels 311, so as to dissipate heat from each surface of the combustion chamber and the upper, middle and lower parts of each surface, so that the temperature of each surface of the combustion chamber is balanced.

[0040] A third air inlet channel 21 for air to enter is provided on the surrounding side walls and the bottom groove wall of the burner 2, so that air enters the burner 2 to supply oxygen to the fire grate.

[0041] The fan assembly 4 includes a smoke hood 41 and a fan 42. The motor used on the fan 42 is a variable speed motor. The variable speed motor is provided with a sensor 421 which can sense the resistance encountered by the fan when it is working and then adjust the speed of the variable speed motor. The sensor 421 obtains the external resistance to judge the amount of air required for combustion, thereby changing the speed of the motor to maintain the stability of combustion and ensure that the temperature of the combustion chamber surface is maintained within a reasonable range.

Claims

1. An air-cooled water heater, characterized in that: The air-cooled water heater comprises a burner (2), a combustion chamber (3), a heat exchanger (5) and a fan assembly (4) arranged from bottom to top; the air-cooled water heater also comprises a water pipe (1) flowing through the heat exchanger (5), the water pipe (1) being provided with a switch valve assembly, the combustion chamber (3) comprising an inner shell (31) with upper and lower openings and an outer shell (32) sleeved on the outer side of the inner shell (31), a connecting structure for connecting the inner shell (31) and the outer shell (32) being provided between the inner shell (31) and the outer shell (32), and the inner shell (31) and the outer shell (32) being connected to each other. 2), a gap (6) is also provided between the outer shell (32), a plurality of first air inlet holes (321) are provided on the outer shell (32) for allowing outside air to flow into the gap (6), the first air inlet holes (321) are arranged next to the connecting structure, the inner shell (31) is provided with a first air inlet channel (311) for allowing air in the gap (6) to enter the inner cavity of the inner shell (31), the fire outlet of the burner (2) is communicated with the lower opening of the combustion chamber (3), and the air inlet of the fan assembly (4) is communicated with the upper opening of the combustion chamber (3).

2. The air-cooled water heater according to claim 1, characterized in that: The connection structure comprises a mounting hole (71) provided on the outer shell (32) and the inner shell (31), and a connection component (72) that cooperates with the mounting hole (71) to connect the outer shell (32) and the inner shell (31).

3. The air-cooled water heater according to claim 2, characterized in that: The connection assembly (72) comprises a bolt (721) and a nut (722); positions on the inner shell (31) and the outer shell (32) corresponding to the mounting hole (71) are provided with an embedding groove (70) for embedding a nut of the bolt (721) or a nut (722).

4. The air-cooled water heater according to claim 3, characterized in that: The first air inlet hole (321) is arranged beside the embedding groove (70).

5. An air-cooled water heater according to claim 1 or 4, characterized in that: A wind guide structure (312) for causing wind to flow upward along the inner wall of the inner shell (31) is provided at a position on the inner side of the inner shell (31) corresponding to the first air inlet channel (311).

6. The air-cooled water heater according to claim 5, characterized in that: The wind guide structure (312) comprises an upwardly inclined guide slope.

7. The air-cooled water heater according to claim 6, characterized in that: The housing (32) is also provided with a plurality of second air inlet channels (322) for letting air into the gap (6).

8. The air-cooled water heater according to claim 1, characterized in that: The fan assembly (4) comprises a smoke collecting hood (41) and a fan (42); the motor used on the fan (42) is a variable speed motor; the variable speed motor is provided with a sensor (421) capable of sensing the resistance encountered by the fan when it is working and thus adjusting the speed of the variable speed motor.

9. The air-cooled water heater according to claim 1, characterized in that: The burner (2) is sealedly connected to the combustion chamber (3), the upper end of the heat exchanger (5) is sealedly connected to the fan assembly (4), and the lower end of the heat exchanger (5) is sealedly connected to the combustion chamber (3).

10. The air-cooled water heater according to claim 7, characterized in that: A plurality of second air inlet channels (322) are provided on each side wall of the outer shell (32), and a first air inlet channel (311) is provided on each side wall of the inner shell (31).

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