Gas water heater with novel structure

Abstract

The invention relates to the technical field of gas water heaters, in particular to a gas water heater with a novel structure, which comprises a shell, a combustion chamber is arranged in the shell, a heat exchanger is arranged above the combustion chamber, the water inlet end of the heat exchanger is communicated with a water inlet pipe, and the water outlet end of the heat exchanger is communicated with a water outlet pipe; a water inlet connector and a water outlet connector are arranged on the lower portion of the shell, the end, away from the heat exchanger, of the water inlet pipe extends downwards and is communicated with the water inlet connector, the end, away from the heat exchanger, of the water outlet pipe extends downwards and is communicated with the water outlet connector, and gaps are reserved between the water inlet pipe and the outer wall of the combustion chamber and between the water outlet pipe and the outer wall of the combustion chamber. According to the invention, the problem that corrosion perforation is easy to occur near a welding spot between the coil pipe of the heat exchanger and the combustion chamber can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of gas water heaters, and in particular to a gas water heater with a new structure. Background Art

[0002] Gas instantaneous water heaters provide us with hot water for daily life quickly and have become an indispensable kitchen appliance for modern families. At present, most gas water heaters on the market use oxygen-free copper heat exchangers with welded coils. However, heat exchangers with welded coils can easily cause condensed water to enter the machine through the coil welding points, corroding parts and causing water leakage and other risks.

[0003] The lower part of the oxygen-free copper heat exchanger with coils is the combustion chamber. The outer side of the combustion chamber surrounds the coil. The coil and the combustion chamber are fixed by welding. The welding point between the coil and the combustion chamber is more likely to accumulate condensed water. The accumulation of condensed water will cause the welding points to be gradually corroded during use, and even cause leakage. On the other hand, the combustion chamber is also made of oxygen-free copper. During the operation of the water heater, a certain amount of condensed water will be generated. The condensed water adheres to the inner wall of the combustion chamber, causing corrosion. Long-term accumulation may cause the copper wall of the combustion chamber to corrode. In the case of severe corrosion, it may also cause the flame to overflow and cause a fire risk, and also cause the combustion condition of the gas water heater to deteriorate. In fact, according to most of the corrosion phenomena of heat exchangers currently reported in the market, the main corrosion sites are mostly near the coils and the combustion chamber at the bottom of the heat exchanger.

[0004] In addition, the combustion chamber itself is made of oxygen-free copper, and the temperature of the combustion chamber is relatively high when it is working, which can easily shorten the service life of the combustion chamber itself and other internal components of the gas water heater. Summary of the invention

[0005] The purpose of the present invention is to provide a gas water heater with a new structure, aiming to improve the problem of corrosion perforation easily occurring near the welding point between the coil and the combustion chamber of the gas water heater in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A gas water heater with a new structure includes a shell, a combustion chamber is arranged inside the shell, a heat exchanger is arranged above the combustion chamber, the water inlet end of the heat exchanger is connected to a water inlet pipe, and the water outlet end is connected to a water outlet pipe, and a water inlet joint and a water outlet joint are arranged at the lower part of the shell, the water inlet pipe extends downward at one end away from the heat exchanger and is connected to the water inlet joint, the water outlet pipe extends downward at one end away from the heat exchanger and is connected to the water outlet joint, and there is a distance between the water inlet pipe and the water outlet pipe and the outer wall of the combustion chamber.

[0008] Furthermore, the combustion chamber is made of stainless steel.

[0009] Furthermore, the combustion chamber is made of aluminum-plated plate.

[0010] Furthermore, an exhaust fan is provided at the open end above the combustion chamber, and the exhaust fan is located above the heat exchanger. The air inlet of the exhaust fan is connected to the upper end of the combustion chamber, and the air outlet extends to the top of the shell; a cavity is provided inside each side wall of the combustion chamber, and the outer wall of each cavity is provided with an air inlet, and the inner wall is provided with an air outlet.

[0011] Furthermore, a single-layer cavity is arranged inside the two side walls with smaller areas of the combustion chamber, and a plurality of air inlets are opened in the middle of the outer wall of the single-layer cavity, and a plurality of air outlets are opened at the upper and lower positions of the inner wall.

[0012] Furthermore, a first cavity and a second cavity are arranged inside the two side walls with a larger area of ​​the combustion chamber. The first cavity is located on the side of the second cavity away from the interior of the combustion chamber. The upper and lower parts of the outer wall of the first cavity are provided with multiple air inlets, and the middle part of the inner wall of the first cavity is provided with multiple connecting holes. The first cavity is connected with the second cavity through the multiple connecting holes, and the upper and lower parts of the inner wall of the second cavity are provided with multiple air outlets.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In the present invention, the water inlet pipe and the water outlet pipe of the heat exchanger do not adopt a conventional coil structure. The water inlet pipe and the water outlet pipe are directly connected to the corresponding joints, which reduces the welding points between the water inlet pipe and the water outlet pipe and the combustion chamber, and reduces the problem of corrosion and perforation due to the accumulation of condensed water near the welding points, which is beneficial to extend the effective service life of the gas water heater and reduce its failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a partial structural diagram of the present invention;

[0017] Figure 2 An exploded view of the combustion chamber of the present invention;

[0018] Figure 3 A cross-sectional view of a combustion chamber of the present invention from one perspective;

[0019] Figure 4 It is a cross-sectional view from another perspective of the combustion chamber of the present invention.

[0020] Marks and corresponding parts names in the attached drawings:

[0021] 1. Shell; 2. Combustion chamber; 3. Heat exchanger; 4. Water inlet pipe; 5. Water outlet pipe; 6. Water inlet joint; 7. Water outlet joint; 8. Exhaust fan; 9. Air inlet; 10. Air outlet; 11. Water flow sensor; 12. Main controller; 13. Single-layer cavity; 14. First cavity; 15. Second cavity; 16. Connecting hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] A new structure of gas water heater, refer to Figure 1 , comprising a shell 1, a combustion chamber 2 is arranged inside the shell 1, a heat exchanger 3 is arranged above the combustion chamber 2, a water inlet end of the heat exchanger 3 is connected to a water inlet pipe 4, and a water outlet end is connected to a water outlet pipe 5, a water inlet joint 6 and a water outlet joint 7 are arranged at the lower part of the shell 1, one end of the water inlet pipe 4 away from the heat exchanger 3 extends downward and is connected to the water inlet joint 6, one end of the water outlet pipe 5 away from the heat exchanger 3 extends downward and is connected to the water outlet joint 7, and a distance is left between the water inlet pipe 4 and the water outlet pipe 5 and the outer wall of the combustion chamber 2.

[0025] In this solution, the water inlet pipe 4 and the water outlet pipe 5 of the heat exchanger 3 do not adopt a conventional coil structure. The water inlet pipe 4 and the water outlet pipe 5 are directly connected to the corresponding joints, which reduces the welding points between the water inlet pipe 4 and the water outlet pipe 5 and the combustion chamber 2, and reduces the problem of corrosion and perforation due to the accumulation of condensed water near the welding points, which is beneficial to extend the effective service life of the gas water heater and reduce its failure rate.

[0026] Example 2

[0027] Based on Example 1, in this example, reference Figure 1 , Figure 2 , Figure 3 as well as Figure 4 An exhaust fan 8 is provided at the open end above the combustion chamber 2, and the exhaust fan 8 is located above the heat exchanger 3. The air inlet of the exhaust fan 8 is connected to the upper end of the combustion chamber 2, and the air outlet extends to the top of the shell 1; a cavity is provided inside each side wall of the combustion chamber 2, and an air inlet 9 is provided on the outer wall of each cavity, and an air outlet 10 is provided on the inner wall.

[0028] In this solution, a water flow sensor 11 is provided on the water inlet joint 6, and a main controller 12 is also provided on the shell 1. The water flow sensor 11 and the exhaust fan 8 are electrically connected to the main controller 12. When the user turns on the hot water faucet, cold water flows in from the water inlet joint 6 and flows through the water flow sensor 11. When the flow reaches the starting flow, the main controller 12 supplies power to the exhaust fan 8, and the exhaust fan 8 rotates for front cleaning to provide the combustion chamber 2 with oxygen required for combustion. After receiving the normal rotation signal of the exhaust fan 8, high voltage electricity is provided to the ignition device for discharge, and the gas proportional valve is opened for gas supply. The gas is ignited by an electric spark and burns. The high-temperature flue gas after combustion heats the cold water through the heat exchanger 3, and hot water flows out from the water outlet pipe 5 and the water outlet joint 7. The waste flue gas after combustion is discharged to the outside of the shell 1 through the air outlet of the exhaust fan 8.

[0029] When the exhaust fan 8 is started, the air inside the combustion chamber 2 is extracted, so that a negative pressure is formed inside the combustion chamber 2, and the cold air outside the combustion chamber 2 enters the corresponding cavity through the air inlet 9 on each cavity. When the cold air flows inside the cavity, it can take away the heat of the inner wall of the combustion chamber 2, which is convenient for reducing the temperature of the side wall of the combustion chamber 2, which is beneficial to extending the service life of the combustion chamber 2 and other surrounding components. The cold air enters the combustion chamber 2 through the air outlet 10 of the cavity to provide the oxygen required for the burner combustion.

[0030] Furthermore, the combustion chamber 2 is made of stainless steel or aluminum-plated plate material. Stainless steel and aluminum-plated plate materials have better corrosion resistance than copper materials, which can extend the service life of the combustion chamber 2 and are more cost-effective.

[0031] Example 3

[0032] Based on Example 2, in this example, refer to Figure 1 , Figure 2 , Figure 3 as well as Figure 4 A single-layer cavity 13 is provided inside the two side walls with a smaller area of ​​the combustion chamber 2. A plurality of air inlets 9 are provided in the middle of the outer wall of the single-layer cavity 13, and a plurality of air outlets 10 are provided at the upper and lower positions of the inner wall. A first cavity 14 and a second cavity 15 are provided inside the two side walls with a larger area of ​​the combustion chamber 2. The first cavity 14 is located on the side of the second cavity 15 away from the interior of the combustion chamber 2. A plurality of air inlets 9 are provided at the upper and lower parts of the outer wall of the first cavity 14. A plurality of connecting holes 16 are provided in the middle of the inner wall of the first cavity 14. The first cavity 14 is connected to the second cavity 15 through the plurality of connecting holes 16. A plurality of air outlets 10 are provided at the upper and lower parts of the inner wall of the second cavity 15.

[0033] In this solution, the temperature on the side wall with a larger area of ​​the combustion chamber 2 is higher, so the number of air inlets 9 opened on the side wall with a larger area of ​​the combustion chamber 2 is greater, so as to provide more cold air to the inside of the corresponding side wall of the combustion chamber 2, thereby ensuring the cooling effect of the combustion chamber 2.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas water heater of a new structure, comprising a shell (1), a combustion chamber (2) is arranged inside the shell (1), a heat exchanger (3) is arranged above the combustion chamber (2), a water inlet end of the heat exchanger (3) is connected to a water inlet pipe (4), and a water outlet end of the heat exchanger (3) is connected to a water outlet pipe (5), and a water inlet joint (6) and a water outlet joint (7) are arranged at the lower part of the shell (1), characterized in that: One end of the water inlet pipe (4) away from the heat exchanger (3) extends downward and is connected to the water inlet joint (6), and one end of the water outlet pipe (5) away from the heat exchanger (3) extends downward and is connected to the water outlet joint (7), and a distance is left between the water inlet pipe (4) and the water outlet pipe (5) and the outer wall of the combustion chamber (2).

2. A gas water heater with a new structure according to claim 1, characterized in that: The combustion chamber (2) is made of stainless steel.

3. A gas water heater with a new structure according to claim 1, characterized in that: The combustion chamber (2) is made of aluminum-plated plate.

4. A gas water heater with a new structure according to claim 1, characterized in that: An exhaust fan (8) is provided at the upper open end of the combustion chamber (2), and the exhaust fan (8) is located above the heat exchanger (3). The air inlet of the exhaust fan (8) is connected to the upper end of the combustion chamber (2), and the air outlet extends to the top of the shell (1); each side wall of the combustion chamber (2) is provided with a cavity, and the outer wall of each cavity is provided with an air inlet (9), and the inner wall is provided with an air outlet (10).

5. A gas water heater with a new structure according to claim 4, characterized in that: A single-layer cavity (13) is arranged inside the two side walls with smaller areas of the combustion chamber (2), and a plurality of air inlets (9) are provided in the middle of the outer wall of the single-layer cavity (13), and a plurality of air outlets (10) are provided at the upper and lower positions of the inner wall.

6. A gas water heater with a new structure according to claim 5, characterized in that: A first cavity (14) and a second cavity (15) are arranged inside the two side walls with larger areas of the combustion chamber (2); the first cavity (14) is located on the side of the second cavity (15) away from the interior of the combustion chamber (2); the upper and lower parts of the outer wall of the first cavity (14) are provided with a plurality of air inlets (9); the middle part of the inner wall of the first cavity (14) is provided with a plurality of connecting holes (16); the first cavity (14) is connected to the second cavity (15) through the plurality of connecting holes (16); and the upper and lower parts of the inner wall of the second cavity (15) are provided with a plurality of air outlets (10).

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