An energy-saving small household boiler

Abstract

This utility model discloses an energy-saving household boiler, including a wall-mounted boiler body and a combustion chamber installed inside it. A heat exchange plate is fixedly installed on the top of the combustion chamber for heat exchange with the interior of the combustion chamber. A gas inlet pipe is installed at the bottom of the combustion chamber, and an air intake structure is fixedly installed on the right side of the combustion chamber. A water pump is installed on the inner wall of the wall-mounted boiler body, and a water inlet pipe and a delivery pipe are installed on the water pump. In this utility model, when high-temperature flue gas enters the exhaust pipe, its residual heat is recovered a second time by the heat exchange jacket in the spiral airflow chamber. The airflow forms a spiral airflow under the guidance of the spiral guide rod, and performs efficient heat exchange with the flue gas. The preheated air is returned to the combustion chamber through the manifold by the air pump as combustion gas. The combustion efficiency is improved through the recovery of waste heat from the flue gas, which not only reduces heat energy waste but also significantly reduces the heat load of the exhaust pipe and extends the equipment life.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, and more specifically, to an energy-saving small household boiler. Background Technology

[0002] With the continuous growth of energy demand and increasingly stringent environmental protection requirements, the energy-saving and environmental performance of household heating and domestic hot water supply systems has received widespread attention. Currently, small household boilers (such as gas-fired wall-hung boilers) are widely used in residential heating. Their core working principle is to generate high-temperature flue gas in the combustion chamber by burning fuels such as natural gas, and then use a heat exchanger to transfer heat to circulating water, thereby providing a heat source for radiators or underfloor heating systems.

[0003] However, the thermal efficiency of traditional household boilers is generally limited, mainly because the flue gas produced during combustion contains a large amount of unused waste heat. This heat energy is directly emitted into the atmosphere, resulting in energy waste and increased operating costs. In addition, the combustion process requires the continuous introduction of external air to assist combustion, but traditional air intake methods do not preheat the cold air, leading to reduced combustion efficiency, increased fuel consumption, and impacting overall energy-saving performance. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide an energy-saving small household boiler to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution;

[0006] An energy-saving household boiler includes a wall-mounted boiler body and a combustion chamber installed inside it. A heat exchange plate is fixedly installed on the top of the combustion chamber for heat exchange with the interior of the combustion chamber. A gas inlet pipe is installed at the bottom of the combustion chamber. An air intake structure is fixedly installed on the right side of the combustion chamber. A water pump is installed on the inner wall of the wall-mounted boiler body. A water inlet pipe and a delivery pipe are installed on the water pump. The other end of the delivery pipe is connected to the left side of the heat exchange plate. A drain pipe is fixedly installed on the right side of the heat exchange plate. The bottom ends of the water inlet pipe and the drain pipe both penetrate through and extend to the bottom of the wall-mounted boiler body. A flue gas duct communicating with the interior of the combustion chamber is installed on the top of the combustion chamber. A flue gas fan is installed on the inner wall of the flue gas duct.

[0007] The air intake structure includes a manifold, which is fixedly installed on the right side of the combustion chamber and communicates with the interior of the combustion chamber. A heat exchange jacket is fixedly connected to the inner wall of the exhaust pipe, and the heat exchange jacket is located at the top of the exhaust fan. A spiral airflow chamber is opened inside the heat exchange jacket. An air intake pipe and a combustion-supporting pipe are fixedly installed on the inner wall of the spiral airflow chamber. Both the air intake pipe and the combustion-supporting pipe extend to the outside of the exhaust pipe. The air intake pipe and the combustion-supporting pipe are located at the top and bottom of the spiral airflow chamber, respectively. An air pump is fixedly installed on the combustion-supporting pipe. An air pump is installed on the inner wall of the wall-mounted boiler body. An air intake pipe and a combustion-supporting pipe are installed on both sides of the air pump. Both the combustion-supporting pipe and the combustion-supporting pipe are connected to the manifold.

[0008] As a further description of the above technical solution: the bottom end of the smoke exhaust pipe is inclined, and the smoke exhaust fan is located in the inclined section.

[0009] As a further description of the above technical solution: a spiral guide rod is fixedly installed on the inner wall of the heat exchange jacket, and the outer side of the spiral guide rod is in contact with the inner wall of the heat exchange jacket.

[0010] As a further description of the above technical solution: dust covers are installed on the outside of both the main body of the wall-mounted boiler and the flue pipe, and the first air inlet pipe and the second air inlet pipe are respectively located inside the two dust covers.

[0011] As a further description of the above technical solution: both the combustion-supporting pipe one and the combustion-supporting pipe two are equipped with control valves.

[0012] As a further description of the above technical solution: the heat exchange jacket is made of aluminized carbon steel.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] In this invention, when high-temperature flue gas enters the exhaust duct, its residual heat is recovered a second time by the heat exchange jacket in the spiral airflow chamber. The airflow forms a spiral airflow under the guidance of the spiral guide rod, and performs efficient heat exchange with the flue gas. The preheated air is pumped back to the combustion chamber through the manifold as combustion gas. The combustion efficiency is improved by recovering the waste heat of the flue gas, which not only reduces heat energy waste, but also significantly reduces the heat load of the exhaust duct and extends the service life of the equipment. Attached Figure Description

[0015] Figure 1 This is a frontal cross-sectional view of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the smoke exhaust pipe part of this utility model;

[0017] Figure 3 For the present utility model Figure 1Enlarged structural diagram at point A in the middle;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the smoke exhaust pipe of this utility model.

[0019] Explanation of the labels in the diagram:

[0020] 1. Boiler body; 2. Combustion chamber; 3. Heat exchange plate; 301. Drain pipe; 4. Gas inlet pipe; 5. Air intake structure; 501. Manifold; 6. Water pump; 601. Water inlet pipe; 602. Delivery pipe; 7. Exhaust pipe; 701. Exhaust fan; 8. Heat exchange jacket; 801. Spiral airflow chamber; 802. Air inlet pipe one; 803. Combustion aid pipe one; 804. Air pump one; 805. Spiral guide rod; 9. Air pump two; 901. Air inlet pipe two; 902. Combustion aid pipe two; 10. Dust cover; 11. Control valve. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0022] Please see Figures 1-4 In this utility model, an energy-saving household boiler includes a wall-mounted boiler body 1 and a combustion chamber 2 installed inside it. A heat exchange plate 3 is fixedly installed on the top of the combustion chamber 2 for heat exchange with the interior of the combustion chamber 2. A gas inlet pipe 4 is installed at the bottom of the combustion chamber 2. An air intake structure 5 is fixedly installed on the right side of the combustion chamber 2. A water pump 6 is installed on the inner wall of the wall-mounted boiler body 1. A water inlet pipe 601 and a delivery pipe 602 are installed on the water pump 6. The other end of the delivery pipe 602 is connected to the left side of the heat exchange plate 3. A drain pipe 301 is fixedly installed on the right side of the heat exchange plate 3. The bottom ends of the water inlet pipe 601 and the drain pipe 301 both penetrate and extend to the bottom of the wall-mounted boiler body 1. A flue gas duct 7 communicating with the interior of the combustion chamber 2 is installed on the top of the combustion chamber 2. A flue gas fan 701 is installed on the inner wall of the flue gas duct 7. The bottom end of the flue gas duct 7 is inclined, and the flue gas fan 701 is located in the inclined part.

[0023] The intake structure 5 includes a manifold 501, which is fixedly installed on the right side of the combustion chamber 2 and communicates with the interior of the combustion chamber 2. A heat exchange jacket 8 is fixedly connected to the inner wall of the exhaust duct 7. The heat exchange jacket 8 is made of aluminized carbon steel and is located at the top of the exhaust fan 701. A spiral airflow chamber 801 is opened inside the heat exchange jacket 8. An intake pipe 802 and a combustion-supporting pipe 803 are fixedly installed on the inner wall of the spiral airflow chamber 801. Both the intake pipe 802 and the combustion-supporting pipe 803 extend to the outside of the exhaust duct 7. The combustion pipe 803 is located at the top and bottom of the spiral airflow chamber 801, respectively. The combustion-supporting pipe 803 is fixedly installed with an air pump 804. The inner wall of the wall-mounted boiler body 1 is installed with an air pump 9. The air inlet pipe 901 and the combustion-supporting pipe 902 are installed on both sides of the air pump 9, respectively. The combustion-supporting pipe 803 and the combustion-supporting pipe 902 are both connected to the manifold 501. The combustion-supporting pipe 803 and the combustion-supporting pipe 902 are both installed with control valves 11. The inner wall of the heat exchange jacket 8 is fixedly installed with a spiral guide rod 805. The outer side of the spiral guide rod 805 is in contact with the inner wall of the heat exchange jacket 8.

[0024] The main body 1 of the wall-mounted boiler is connected to multiple auxiliary external structures, such as the water inlet pipe 601 at the bottom of the water pump 6 connected to an external water source, etc. The exhaust pipe 7 in the figure is a partial schematic diagram, etc. The combustion chamber 2 contains an ignition device, etc. These are all existing mature technologies and therefore not described in detail.

[0025] When the energy-saving household boiler needs to be started, the operator first introduces gas into the combustion chamber 2 through the gas inlet pipe 4, and ignites the gas through the ignition device inside the combustion chamber 2. The high-temperature flue gas generated by combustion flows upward and exchanges heat fully with the heat exchange plate 3. At the same time, the water pump 6 draws in external cold water through the water inlet pipe 601 and delivers it to the left side of the heat exchange plate 3 through the delivery pipe 602. When the cold water flows inside the heat exchange plate 3, it absorbs the heat of the combustion chamber 2. The heated hot water is discharged from the drain pipe 301 and supplied to the radiators or domestic hot water.

[0026] The flue gas produced by combustion continues to rise and enters the exhaust duct 7. The exhaust fan 701 operates to discharge the flue gas. During this process, the residual heat in the flue gas is recovered a second time through the heat exchange jacket 8. External air enters the spiral airflow chamber 801 through the intake pipe 802. Under the guidance of the spiral guide rod 805, a spiral airflow is formed, which fully exchanges heat with the high-temperature flue gas. The heated air is pressurized by the air pump 804 through the combustion pipe 803 and then sent back to the combustion chamber 2 as combustion air through the manifold 501. At the same time, the air pump 9 draws in external air through the intake pipe 901 and supplements the combustion air to the combustion chamber 2 through the combustion pipe 902 and the manifold 501. The operator can adjust the intake ratio of the two combustion air sources through the control valve 11 to achieve optimized control of combustion efficiency.

[0027] The heat exchange jacket 8, made of aluminized carbon steel, has good high temperature resistance and thermal conductivity, ensuring waste heat recovery efficiency. When it is necessary to adjust the heating power, it is only necessary to adjust the gas supply and the flow rate of the water pump 6 accordingly, and the system can automatically maintain the optimal combustion state.

[0028] In this invention, when high-temperature flue gas enters the exhaust duct 7, its residual heat is recovered a second time by the heat exchange jacket 8 in the spiral airflow chamber 801. The airflow forms a spiral airflow under the guidance of the spiral guide rod 805, and performs efficient heat exchange with the flue gas. The preheated air is returned to the combustion chamber 2 through the manifold 501 via the air pump 804 as a combustion-supporting gas. The combustion efficiency is improved by recovering the waste heat of the flue gas, which not only reduces the waste of heat energy, but also significantly reduces the heat load of the exhaust duct 7 and extends the service life of the equipment.

[0029] Please see Figures 1-4 The wall-mounted boiler body 1 and the flue gas pipe 7 are both equipped with dust covers 10 on their outer sides, and the first air inlet pipe 802 and the second air inlet pipe 901 are located inside the two dust covers 10 respectively.

[0030] In this invention, the dust cover 10 can filter the airflow entering the first air intake pipe 802 and the second air intake pipe 901, preventing a large amount of dust and impurities from entering the pipes and causing blockages that affect combustion efficiency.

[0031] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. An energy-saving domestic small boiler comprising a wall-hung boiler body (1) and a combustion chamber (2) installed inside the same, characterized in that: A heat exchange plate (3) is fixedly installed on the top of the combustion chamber (2). The heat exchange plate (3) is used to exchange heat with the interior of the combustion chamber (2). A gas inlet pipe (4) is installed at the bottom of the combustion chamber (2). An air intake structure (5) is fixedly installed on the right side of the combustion chamber (2). A water pump (6) is installed on the inner wall of the wall-mounted boiler body (1). A water inlet pipe (601) and a delivery pipe (602) are installed on the water pump (6). The other end of the delivery pipe (602) is connected to the left side of the heat exchange plate (3). A drain pipe (301) is fixedly installed on the right side of the heat exchange plate (3). The bottom ends of the water inlet pipe (601) and the drain pipe (301) both penetrate and extend to the bottom of the wall-mounted boiler body (1). A flue gas pipe (7) communicating with the interior of the combustion chamber (2) is installed on the top of the combustion chamber (2). A flue gas fan (701) is installed on the inner wall of the flue gas pipe (7). The intake structure (5) includes a manifold (501), which is fixedly installed on the right side of the combustion chamber (2) and communicates with the interior of the combustion chamber (2). A heat exchange jacket (8) is fixedly connected to the inner wall of the exhaust pipe (7). The heat exchange jacket (8) is located at the top of the exhaust fan (701). A spiral airflow chamber (801) is opened inside the heat exchange jacket (8). An intake pipe (802) and a combustion-supporting pipe (803) are fixedly installed on the inner wall of the spiral airflow chamber (801). The intake pipe (802) and the combustion-supporting pipe (803) are connected to the combustion-supporting pipe (803). The combustion-supporting pipe 1 (803) extends to the outside of the flue pipe (7). The air inlet pipe 1 (802) and the combustion-supporting pipe 1 (803) are located at the top and bottom of the spiral airflow chamber (801), respectively. An air pump 1 (804) is fixedly installed on the combustion-supporting pipe 1 (803). An air pump 2 (9) is installed on the inner wall of the wall-mounted boiler body (1). An air inlet pipe 2 (901) and a combustion-supporting pipe 2 (902) are installed on both sides of the air pump 2 (9). The combustion-supporting pipe 1 (803) and the combustion-supporting pipe 2 (902) are both connected to the manifold (501).

2. An energy efficient domestic small boiler according to claim 1, characterized in that: The bottom end of the exhaust pipe (7) is inclined, and the exhaust fan (701) is located in the inclined part.

3. The energy efficient small home boiler of claim 1, wherein: A spiral guide rod (805) is fixedly installed on the inner wall of the heat exchange sleeve (8), and the outer side of the spiral guide rod (805) is in contact with the inner wall of the heat exchange sleeve (8).

4. The energy-saving household boiler according to claim 1, characterized in that: Dust covers (10) are installed on the outside of the wall-mounted boiler body (1) and the flue pipe (7), and the first air inlet pipe (802) and the second air inlet pipe (901) are located inside the two dust covers (10).

5. The energy efficient small home boiler of claim 1, wherein: Both the combustion-supporting pipe one (803) and the combustion-supporting pipe two (902) are equipped with control valves (11).

6. An energy efficient home boiler as set forth in claim 1, characterized in that: The heat exchange jacket (8) is made of aluminized carbon steel.

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