Fresh air preheating energy-saving device of gas-fired boiler

Abstract

The utility model relates to the technical field of gas-fired boilers, in particular to a fresh air preheating energy-saving device of a gas-fired boiler, which solves the problems that heat resources in waste gas are wasted and a smoke outlet pipe is difficult to clean, and comprises a water tank, a shell and a combustion chamber, a water inlet pipe and a water outlet pipe penetrate through the side face of the water tank, the water inlet pipe is wound outside the water tank in an upper-lower-layer annular mode, a smoke outlet pipe penetrates through the side face of a cavity in the end of the shell, the smoke outlet pipe is a straight pipe, the other end of the smoke outlet pipe penetrates out of the shell, and the smoke outlet pipe is located between the upper layer and the lower layer of the water inlet pipe. According to the utility model, waste gas in the smoke outlet pipe can preheat cold water, heat resources of waste smoke are effectively utilized, and when ash is accumulated on the inner wall of the smoke outlet pipe, the smoke outlet pipe is a straight pipe, and a cleaning stick can be directly used for poking the smoke outlet pipe to clean the ash on the inner wall of the smoke outlet pipe, so that the cleaning is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of gas boiler technology, specifically to a gas boiler fresh air preheating and energy-saving device. Background Technology

[0002] Gas-fired boilers include gas-fired hot water boilers, gas-fired hot water boilers, and gas-fired steam boilers. Among them, gas-fired hot water boilers are also called gas-fired heating boilers and gas-fired bathing boilers. As the name suggests, gas-fired boilers refer to boilers that use gas as fuel. Compared with oil-fired boilers and electric boilers, gas-fired boilers are the most economical, so most people choose gas-fired boilers as boiler equipment for steam, heating, and bathing.

[0003] However, existing gas-fired boilers have some drawbacks, such as:

[0004] First, the exhaust gas produced after the gas combustion is directly discharged from the boiler. However, this exhaust gas still contains heat, and direct discharge will lead to heat waste. In addition, after working for a long time, the inner wall of the flue pipe will be covered with ash, and the existing boiler flue pipe is relatively difficult to clean. This layer of ash reduces the heat conduction rate. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a gas boiler fresh air preheating energy-saving device to solve the above problems.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A gas-fired boiler fresh air preheating and energy-saving device includes a water tank, an outer shell, and a combustion chamber. The water tank and the combustion chamber are both fixed inside the outer shell. An inlet pipe and an outlet pipe pass through the side of the water tank. The inlet pipe is coiled in an upper and lower ring around the outside of the water tank. A burner is installed on the side of the combustion chamber. A connecting pipe is connected to the side of the combustion chamber. The other end of the connecting pipe is connected to the end cavity of the outer shell. A flue pipe passes through the side of the end cavity of the outer shell. The flue pipe is a straight pipe and its other end extends out of the outer shell. The flue pipe is located between the upper and lower layers of the inlet pipe.

[0008] With the above technical solution, when cold water is discharged into the water tank from the inlet pipe, the flue pipe is close to the inlet pipe, which allows the exhaust gas in the flue pipe to preheat the cold water, effectively utilizing the heat resources of the exhaust gas. When ash accumulates on the inner wall of the flue pipe, since the flue pipe is a straight pipe, it can be directly pierced with a cleaning stick to clean the ash from the inner wall of the flue pipe, ensuring that the heat of the exhaust gas in the flue pipe is dissipated in time, so as to heat the cold water more efficiently and improve the utilization rate of the exhaust gas.

[0009] Preferably, the water tank is fixed to the upper side of the combustion chamber, the end of the water inlet pipe extends upward through the outer casing, and the water outlet pipe extends downward.

[0010] Preferably, a side door is rotatably mounted on the side of the end cavity of the outer casing via a hinge;

[0011] With the above technical solution, opening the side door exposes the interior of the end cavity of the outer casing and the smoke outlet pipe, making it easier to clean the ash inside the outer casing and the smoke outlet pipe.

[0012] Preferably, a bottom door is rotatably mounted on the lower side of the combustion chamber via a hinge;

[0013] The above technical solution allows for easy cleaning of the combustion chamber by opening the bottom door.

[0014] Preferably, the exhaust pipe has two vertical rows, both of which pass through the side of the outer casing, and each exhaust pipe is located between the upper and lower layers of the water inlet pipe.

[0015] Through the above technical solution, multiple flue pipes can heat the cold water in the inlet pipe multiple times, thereby improving the heat utilization rate of the waste flue gas.

[0016] Preferably, the burner's outlet end extends into the combustion chamber, and the burner's inlet end is connected to an inlet pipe, which extends out of the outer casing.

[0017] Through the above technical solution, the gas enters the burner from the intake pipe, the burner ignites and burns, and then the flame is injected into the combustion chamber for combustion.

[0018] The beneficial effects of this utility model are as follows:

[0019] In summary, this device allows the exhaust pipe to be placed close to the water inlet pipe, enabling the exhaust gas in the exhaust pipe to preheat the cool water, thereby accelerating the heating efficiency of the water and effectively utilizing the heat resources of the exhaust gas. When ash accumulates on the inner wall of the exhaust pipe, since the exhaust pipe is a straight pipe, the ash can be directly removed by piercing the exhaust pipe with a cleaning stick, making cleaning more convenient and ensuring that the heat of the exhaust gas in the exhaust pipe is transferred to the water inlet pipe in a timely manner for more efficient heating of the cool water, thus improving the utilization rate of the exhaust gas. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention.

[0021] Figure 2 This is a bottom view of the present invention.

[0022] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0023] Figure 4This is a cross-sectional view of the present invention after part of the outer shell has been removed.

[0024] Figure 5 This is a schematic diagram showing the assembly of the water tank, inlet pipe, and outlet pipe in this utility model.

[0025] In the diagram: 1. Water tank; 2. Water inlet pipe; 3. Side door; 4. Outer shell; 5. Bottom door; 6. Combustion chamber; 7. Water outlet pipe; 8. Smoke outlet pipe; 9. Air inlet pipe; 10. Burner; 11. Connecting pipe. Detailed Implementation

[0026] The following will refer to the attached reference. Figures 1 to 5 The various embodiments of this utility model will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0027] As attached Figure 1 - Appendix Figure 5 As shown, a gas-fired boiler fresh air preheating energy-saving device includes a water tank 1, an outer shell 4, and a combustion chamber 6;

[0028] Outer shell 4: An end cavity is provided inside the left end of the outer shell 4, and a side door 3 is rotatably installed on the side of the end cavity of the outer shell 4 via a hinge. The upper and lower ends of the outer shell 4 are connected internally.

[0029] Water tank 1: Water tank 1 is fixed inside the upper part of the outer shell 4, and the upper side of water tank 1 extends out of the outer shell 4. Water inlet pipe 2 and water outlet pipe 7 pass through the side of water tank 1. Water outlet pipe 7 extends downward to facilitate drainage. Water inlet pipe 2 is coiled around the outside of water tank 1 in an upper and lower ring. Then, the other end of water inlet pipe 2 extends upward through the outer shell 4 to facilitate water intake. Water inlet pipe 2 is also located inside the outer shell 4, isolated from the external environment, to reduce the heat in water inlet pipe 2 from spreading outward.

[0030] Combustion chamber 6: Combustion chamber 6 is fixed inside the lower end of the outer shell 4 and is fixed to the lower side of the water tank 1 to facilitate heating of the water tank 1. A burner 10 is installed on the side of the combustion chamber 6. The flame outlet end of the burner 10 passes into the combustion chamber 6. The air inlet end of the burner 10 is connected to an air inlet pipe 9. The air inlet pipe 9 passes out of the outer shell 4. The front and rear sides of the combustion chamber 6 are connected to a central connecting pipe 11. The other end of the central connecting pipe 11 is connected to the end cavity of the outer shell 4. Two vertical smoke pipes 8 pass through the side of the end cavity of the outer shell 4. The smoke pipes 8 are straight pipes and the other end passes out of the outer shell 4. Each smoke pipe 8 is located between the upper and lower layers of the water inlet pipe 2. A bottom door 5 is installed on the lower side of the combustion chamber 6 by a hinge.

[0031] The working principle of this device is as follows:

[0032] Water enters the water tank 1 through the water inlet pipe 2, and the gas enters the burner 10 through the gas inlet pipe 9. The burner 10 is ignited and injected into the combustion chamber 6 for combustion, directly heating the water in the water tank 1. The exhaust gas after combustion is introduced into the end cavity inside the outer shell 4 through the connecting pipe 10, and then flows into the flue pipe 8. The heat of the flue gas in the flue pipe 8 is transferred to the water inlet pipe 2 to preheat the water in the water inlet pipe 2.

[0033] After a long period of operation, open the side door 3, use a cleaning stick to pierce through the flue pipe 8, clean off the ash inside the flue pipe 8, and then open the bottom door 5 to clean the combustion chamber 6.

[0034] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A gas-fired boiler fresh air preheating and energy-saving device, characterized in that, It includes a water tank (1), an outer shell (4), and a combustion chamber (6). The water tank (1) and the combustion chamber (6) are both fixed inside the outer shell (4). A water inlet pipe (2) and a water outlet pipe (7) pass through the side of the water tank (1). The water inlet pipe (2) is coiled in an upper and lower ring around the outside of the water tank (1). A burner (10) is installed on the side of the combustion chamber (6). A central connecting pipe (11) is connected to the side of the combustion chamber (6). The other end of the central connecting pipe (11) is connected to the end cavity of the outer shell (4). A smoke outlet pipe (8) passes through the side of the end cavity of the outer shell (4). The smoke outlet pipe (8) is a straight pipe and its other end passes through the outer shell (4). The smoke outlet pipe (8) is located between the upper and lower layers of the water inlet pipe (2).

2. The gas-fired boiler fresh air preheating energy-saving device according to claim 1, characterized in that, The water tank (1) is fixed on the upper side of the combustion chamber (6), the end of the water inlet pipe (2) extends upward through the outer shell (4), and the water outlet pipe (7) extends downward.

3. The gas-fired boiler fresh air preheating energy-saving device according to claim 1, characterized in that, A side door (3) is rotatably mounted on the side of the end cavity of the outer shell (4) via a hinge.

4. The gas-fired boiler fresh air preheating energy-saving device according to claim 1, characterized in that, The combustion chamber (6) has a bottom door (5) mounted on its lower side via a hinge.

5. The gas-fired boiler fresh air preheating energy-saving device according to claim 1, characterized in that, The exhaust pipe (8) has two vertical columns, and both exhaust pipes (8) pass through the side of the outer shell (4). Each exhaust pipe (8) is located between the upper and lower layers of the water inlet pipe (2).

6. The gas-fired boiler fresh air preheating energy-saving device according to claim 1, characterized in that, The burner (10) has its flame outlet end inserted into the combustion chamber (6), and its air inlet end is connected to an air inlet pipe (9), which extends out of the outer shell (4).

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