Novel fuel oil wall-hanging stove

Abstract

The invention belongs to the technical field of wall-hanging stoves, and particularly relates to a novel fuel oil wall-hanging stove, a combustion system comprises a combustor and a combustion chamber connected with the combustor, the combustor is provided with an ignition needle and an oil nozzle, and the oil nozzle is connected with an oil pump through an oil inlet pipe; a plurality of air inlet holes are formed in the wall of the combustor and communicated with an air chamber between the combustor and the combustor shell, and the air chamber is connected with a fan through an air inlet pipe. The water circulation system comprises a coil pipe located in the combustion chamber, inlet water of the coil pipe is connected with a water inlet pipe, outlet water of the coil pipe is connected with a water cooling chamber located outside the combustor shell through a backflow pipe I, outlet water of the water cooling chamber is connected with a heating plate located in the combustion chamber through a backflow pipe II, and the heating plate is located in the central area of the coil pipe and right faces the combustor. The water outlet pipe is connected with the water outlet valve set. By designing the unique water circulation system, the three-time heat absorption process is achieved, the heat energy utilization rate is effectively increased, and compared with a traditional secondary heat absorption mode, the heat efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to a novel oil-fired wall-mounted boiler, belonging to the technical field of wall-mounted boilers. Background Art

[0002] As an efficient household heating solution, wall-mounted boilers play an important role in most families. They use gas as the main energy source, and through a series of heat energy conversion processes, they convert the heat energy generated by natural gas combustion into hot water, and then evenly distribute the heat to the room through the radiator, meeting the dual needs of household heating and hot water supply. However, the popularization and application of gas wall-mounted boilers also face some challenges, especially in remote or sparsely populated areas.

[0003] First of all, the construction of natural gas pipeline networks in these areas faces many difficulties. Due to the vast territory and scattered population, the construction of natural gas pipeline networks requires a large amount of land and space resources, and also requires the construction of a large number of pipelines and related facilities. This requires not only a large amount of capital investment, but also sufficient human resources for maintenance and operation. Limited by the regional economic development status and infrastructure construction level, the construction of natural gas pipeline networks in many remote areas is often delayed or impossible, which limits the application of gas wall-mounted boilers in these areas.

[0004] Secondly, for areas without natural gas pipeline coverage, the construction of traditional heating pipeline networks also faces challenges. Due to factors such as geography, climate and economy, it is often difficult to build and maintain complex heating pipeline systems in these areas. Therefore, winter heating has become an urgent problem to be solved.

[0005] In addition, even in some areas where natural gas pipeline facilities are already available, there is still room for improvement in the combustion efficiency and heat conversion rate of ordinary wall-mounted boilers. Although gas wall-mounted boilers have greatly improved energy utilization efficiency compared to traditional coal-fired heating methods, some heat energy is still lost during the combustion and conversion process.

[0006] The invention patent of the applicant (publication number CN117329701A) proposes an oil-fired wall-mounted boiler. Although it has higher energy utilization efficiency and more reasonable structure than traditional gas-fired wall-mounted boilers, its thermal efficiency still needs to be improved and its structure still needs to be optimized. Summary of the invention

[0007] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a new type of oil-fired wall-mounted boiler with higher thermal efficiency.

[0008] The novel fuel-fired wall-mounted boiler described in the present invention comprises an outer shell, in which a combustion system and a water circulation system are arranged, the combustion system comprises a burner and a combustion chamber connected to the burner, the burner is equipped with an ignition needle and an oil nozzle, and the oil nozzle is connected to an oil pump through an oil inlet pipe; a plurality of air inlet holes are opened on the wall of the burner, the air inlet holes are connected to a wind chamber between the burner and the burner outer shell, and the wind chamber is connected to a fan through an air inlet pipe; the water circulation system comprises a coil located in the combustion chamber, the water inlet of the coil is connected to a water inlet pipe, the water outlet of the coil is connected to a water cooling chamber located outside the burner outer shell through a return pipe I, the water outlet of the water cooling chamber is connected to a heating plate located in the combustion chamber through a return pipe II, the heating plate is located in the central area of ​​the coil, facing the burner, the water outlet of the heating plate is connected to a water outlet pipe, and the water outlet pipe is connected to a water outlet valve group.

[0009] The novel fuel oil wall-mounted boiler uses fuel oil as a heat source, burns the fuel oil through a combustion system, generates heat, and heats the water in the coil and heating plate. The fuel oil is sprayed into the burner from the oil storage container by an oil pump through a fuel nozzle, and the air is sent into the burner through an air inlet on the burner wall by a fan. The fuel and air are mixed, and the ignition needle ignites, ignites the fuel, and generates a flame in the combustion chamber. The heat generated by the combustion is transferred to the coil and heating plate located in the combustion chamber, and the water therein is heated and becomes hot water. The hot water in the coil enters the water cooling chamber through a return pipe I, absorbs the heat of the burner, further absorbs the heat, reduces the temperature of the outer wall of the burner, and increases the service life of the burner. The water passing through the water cooling chamber enters the heating plate in the combustion chamber through a return pipe II, absorbs the heat energy of the combustion chamber again, and further absorbs the heat, thereby greatly improving the utilization rate of heat energy. Compared with the previous secondary heat absorption, the present invention improves thermal efficiency through three heat absorptions, and the coil is located at the inner wall of the combustion chamber, and the heating plate is located at the center of the combustion chamber, which can better absorb the heat energy of the entire combustion chamber.

[0010] The burner is provided with a fuel injection nozzle, a premixing chamber and a mixing chamber in sequence. The premixing chamber and the mixing chamber are separated by a swirl plate, and a diffusion plate is provided after the mixing chamber. The volume of the premixing chamber is smaller than that of the mixing chamber. The swirl plate is provided with a plurality of swirl air ports that can cause the gas entering the mixing chamber to generate a swirl. The edge of the diffusion plate is provided with a plurality of diffusion air ports that can cause the gas entering the combustion chamber to generate a trumpet-shaped diffusion. The center of the diffusion plate is provided with a direct blowing air port. The fuel is initially atomized by the nozzle and then sprayed into the premixing chamber. Since the volume of the premixing chamber is small, the air and the atomized fuel form high-pressure gas in the premixing chamber. The strong airflow passes through the swirl air ports on the swirl plate and enters the mixing chamber, so that the fuel and air are mixed more fully, thereby improving the combustion effect. The airflow in the mixing chamber passes through the diffusion air ports and the direct blowing air ports on the diffusion plate, so that the flame spreads throughout the entire combustion chamber, so that the coil and the heating plate can be fully heated, thereby greatly improving the thermal efficiency.

[0011] The water inlet pipe is connected to the water outlet of the water pump, the water inlet of the water pump is connected to the water inlet valve group, and the water inlet valve group is also connected to the expansion water tank. The main function of the expansion water tank is to maintain the system pressure stable. When the water pressure inside the wall-mounted boiler changes, the liquid level in the expansion water tank will rise or fall, playing a certain buffering role, so that the abnormal water pressure is stabilized, and at the same time, the control water pump is prevented from being affected by the pressure change and frequently switched on and off, thereby ensuring the normal use of the wall-mounted boiler.

[0012] The water outlet valve group and the water inlet valve group are also connected by a plate heat exchanger, so that high-temperature hot water can be used to heat domestic water.

[0013] The water cooling chamber surrounds the burner shell, thereby increasing the contact area between the water cooling chamber and the burner shell.

[0014] A condenser is arranged outside the combustion chamber, and the condenser is connected to the combustion chamber through the smoke outlet on the back plate. The condenser surrounds the combustion chamber, and the top of the condenser is connected to the smoke pipe. The condenser can condense the water vapor in the combustion exhaust gas into water and release potential heat, which is then absorbed by the heating coil, so that the heat energy released by the exhaust gas can be better utilized, thereby improving energy efficiency. In addition, the condenser can reduce the temperature of the exhaust gas and the operating temperature of the equipment, thereby extending the life of the equipment. The smoke outlet is located on the back plate, and the smoke pipe is located on the top, which can increase the smoke flow path and make full use of the heat in the smoke.

[0015] The bottom of the condenser is connected to a condensate collector via a condenser pipe, and the condensate flows to the condensate collector via the condenser pipe and can be released periodically.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Significantly improve thermal efficiency: Through the design of a unique water circulation system, including coils, water cooling chambers and heating plates, a three-step heat absorption process is achieved, effectively improving the utilization rate of thermal energy. The coils are located on the inner wall of the combustion chamber, and the heating plate is located in the center of the combustion chamber, which can better absorb the heat energy of the entire combustion chamber. Compared with the traditional secondary heat absorption method, the thermal efficiency is significantly improved.

[0018] 2. Optimize the combustion system: The burner is equipped with a fuel nozzle, a premixing chamber, a mixing chamber, a swirl plate and a diffusion plate, so that the fuel and air can be mixed more fully, improving the combustion effect. The flame can spread throughout the combustion chamber, so that the coil and the heating plate can be fully heated, thereby further improving the thermal efficiency.

[0019] 3. Extend the life of the equipment: The water-cooling chamber surrounds the burner shell, increasing the contact area with the burner shell, effectively reducing the temperature of the burner outer wall and increasing the service life of the burner. In addition, the design of the condenser can condense the water vapor in the combustion exhaust gas into water and release potential heat, which reduces the operating temperature of the equipment and further extends the life of the equipment.

[0020] 4. Strong adaptability: The new oil-fired wall-mounted boiler of the present invention is not restricted by the natural gas pipeline network and is suitable for remote or sparsely populated areas, solving the problem of difficult heating in these areas in winter. At the same time, its high efficiency and environmental protection characteristics also meet the needs of modern families for heating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the shell structure of the present invention;

[0022] Figure 2 It is one of the internal structure schematic diagrams of the present invention;

[0023] Figure 3 This is the second schematic diagram of the internal structure of the present invention;

[0024] Figure 4 is a cross-sectional view of the internal structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the connection structure of the heating plate;

[0026] Figure 6 It is a cross-sectional view of the internal structure of the burner;

[0027] Figure 7 It is a schematic diagram of the water flow direction in the water-cooling chamber.

[0028] In the figure: 1. oil pump; 2. oil inlet pipe; 3. water pump; 4. water inlet pipe; 5. fan; 6. ignition needle; 7. fuel injection nozzle; 8. air inlet pipe; 9. expansion tank; 10. burner housing; 11. return pipe II; 12. smoke pipe; 13. water cooling chamber; 14. condenser; 15. water outlet pipe; 16. return pipe I; 17. condenser; 18. water outlet valve group; 19. condensate collection Collector; 20. Wind chamber; 21. Burner; 22. Coil; 23. Combustion chamber; 24. Smoke outlet; 25. Heating plate; 26. Premixing chamber; 27. Mixing chamber; 28. Swirl plate; 29. ​​Swirl air outlet; 30. Diffusion plate; 31. Diffusion air outlet; 32. Water inlet of water-cooling chamber; 33. Water outlet of water-cooling chamber; 34. Plate heat exchanger; 35. Water inlet valve group; 36. Direct blowing air outlet. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with specific embodiments.

[0030] However, the description of the present invention is merely an embodiment of structural and even functional description, and the scope of rights of the present invention is not limited by the embodiments described herein.

[0031] For example, multiple embodiments may have various modifications and various forms, and it should be understood that the scope of rights of the present invention includes equivalents that can implement the technical concept.

[0032] like Figures 1 to 7 As shown, this embodiment is implemented by the following technical scheme: it includes a shell, a combustion system and a water circulation system are arranged in the shell, the combustion system includes a burner 21 and a combustion chamber 23 connected to the burner 21, the burner 21 is equipped with an ignition needle 6 and a fuel injector 7, and the fuel injector 7 is connected to the oil pump 1 through the oil inlet pipe 2.

[0033] The water circulation system includes a coil 22 located in the combustion chamber 23, the water inlet of the coil 22 is connected to the water inlet pipe 4, and the water outlet of the coil 22 is connected to the water cooling chamber 13 located outside the burner housing 10 through the return pipe I16, and the water cooling chamber 13 surrounds the burner housing 10. The water outlet of the water cooling chamber 13 is connected to the heating plate 25 located in the combustion chamber 23 through the return pipe II11. The heating plate 25 is located in the central area of ​​the coil 22, facing the burner 21, and the water outlet of the heating plate 25 is connected to the water outlet pipe 15, and the water outlet pipe 15 is connected to the water outlet valve group 18.

[0034] A plurality of air inlet holes are provided on the wall of the burner 21, and the air inlet holes are connected to the air chamber 20 between the burner 21 and the burner housing 10, and the air chamber 20 is connected to the fan 5 through the air inlet pipe 8; the burner 21 is provided with a fuel injector 7, a premixing chamber 26 and a mixing chamber 27 in sequence, and the premixing chamber 26 and the mixing chamber 27 are separated by a swirl plate 28, and a diffusion plate 30 is provided behind the mixing chamber 27; the volume of the premixing chamber 26 is smaller than that of the mixing chamber 27, and the swirl plate 28 is provided with a plurality of swirl air ports 29 that can cause the gas entering the mixing chamber 27 to generate a swirl, and the edge of the diffusion plate 30 is provided with a plurality of diffusion air ports 31 that can cause the gas entering the combustion chamber 23 to generate a trumpet-shaped diffusion, and a straight blowing air port 36 is provided in the center of the diffusion plate 30.

[0035] The water inlet pipe 4 is connected to the water outlet of the water pump 3, and the water inlet of the water pump 3 is connected to the water inlet valve group 35, and the water inlet valve group 35 is also connected to the expansion tank 9. The water outlet valve group 18 and the water inlet valve group 35 are also connected through a plate heat exchanger 34.

[0036] A condenser 14 is provided outside the combustion chamber 23, and the condenser 14 is connected to the combustion chamber 23 through a smoke port 24 on the back plate. The condenser 14 surrounds the combustion chamber 23, and the top of the condenser 14 is connected to the smoke pipe 12. The bottom of the condenser 14 is connected to the condensed water collector 19 through a condensation pipe 17.

[0037] Working principle of the present invention:

[0038] The novel oil-fired wall-mounted boiler utilizes oil as a heat source, and burns the oil through a combustion system to generate heat to heat the water in the coil 22 and the heating plate 25 .

[0039] The fuel is sprayed from the oil storage container into the burner 21 through the oil pump 1 through the oil nozzle 7, and the air is sent into the burner 21 through the air inlet on the burner wall through the fan 5. The fuel and air are mixed, and the ignition needle 6 ignites, ignites the fuel, and generates a flame in the combustion chamber 23. The heat generated by the combustion is transferred to the coil 22 and the heating plate 25 located in the combustion chamber, and the water therein is heated and becomes hot water. The hot water in the coil 22 enters the water cooling chamber 13 through the return pipe I16, absorbs the heat of the burner 21, further absorbs the heat, reduces the temperature of the outer wall of the burner, and increases the service life of the burner. The water passing through the water cooling chamber 13 enters the heating plate 25 in the combustion chamber 23 through the return pipe II11, and absorbs the heat energy of the combustion chamber 23 again, so that the heat is further absorbed, thereby greatly improving the utilization rate of heat energy. Compared with the previous secondary heat absorption, the present invention improves the thermal efficiency through three heat absorptions, and the coil 22 is located at the inner wall of the combustion chamber, and the heating plate 25 is located at the center of the combustion chamber, which can better absorb the heat energy of the entire combustion chamber. The water cooling chamber 13 surrounds the burner housing 10, thereby increasing the contact area between the water cooling chamber 13 and the burner housing 10, which is beneficial to heat exchange. Water flows into the water cooling chamber from the water inlet 32 ​​and bypasses the two sides of the burner housing 10. Figure 7 As shown, the water flowing out of the water outlet 33 of the water cooling chamber enters the external water heating equipment through the water outlet pipe 15. The return water of the water heating equipment enters the wall-mounted boiler through the water inlet pipe 4.

[0040] During this process, the fuel is initially atomized by the fuel injector 7 and then sprayed into the premixing chamber 26. Since the volume of the premixing chamber 26 is small, the air and the atomized fuel form high-pressure gas in the premixing chamber 26. The strong airflow passes through the swirl air port 29 on the swirl plate 28 and enters the mixing chamber 27, so that the fuel and air are mixed more fully, thereby improving the combustion effect. The airflow in the mixing chamber 27 passes through the diffusion air port 31 and the direct blowing air port 36 on the diffusion plate 30, so that the flame spreads throughout the combustion chamber 23, so that the coil 22 and the heating plate 25 can be fully heated, thereby greatly improving the thermal efficiency.

[0041] The invention improves the structure of the burner and the combustion chamber and the water circulation system of three-time heat absorption, so that the heat energy utilization rate of the wall-mounted boiler can be increased from less than 93% to about 98%, which greatly improves the heat energy utilization rate.

[0042] In this embodiment, the main function of the expansion water tank 9 is to maintain the system pressure stable. When the water pressure inside the wall-mounted boiler changes, the liquid level in the expansion water tank 9 will rise or fall, playing a certain buffering role, so that the abnormal water pressure is stabilized, and at the same time, the control water pump is prevented from being affected by pressure changes and frequent switching, thereby ensuring the normal use of the wall-mounted boiler.

[0043] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and equal changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention should all fall within the scope of the patent coverage of the present invention.

Claims

1. A new type of oil-fired wall-mounted boiler, comprising a shell, a combustion system and a water circulation system are arranged in the shell, characterized in that: The combustion system comprises a burner (21) and a combustion chamber (23) connected to the burner (21), the burner (21) is equipped with an ignition needle (6) and an oil nozzle (7), the oil nozzle (7) is connected to an oil pump (1) through an oil inlet pipe (2); a plurality of air inlet holes are opened on the wall of the burner (21), the air inlet holes are connected to a wind chamber (20) between the burner (21) and a burner housing (10), the wind chamber (20) is connected to a fan (5) through an air inlet pipe (8); the water circulation system comprises a coil ( 22), the water inlet of the coil (22) is connected to the water inlet pipe (4), the water outlet of the coil (22) is connected to the water cooling chamber (13) located outside the burner housing (10) through the return pipe I (16), the water outlet of the water cooling chamber (13) is connected to the heating plate (25) located in the combustion chamber (23) through the return pipe II (11), the heating plate (25) is located in the central area of ​​the coil (22), facing the burner (21), the water outlet of the heating plate (25) is connected to the water outlet pipe (15), and the water outlet pipe (15) is connected to the water outlet valve group (18).

2. The novel oil-fired wall-mounted boiler according to claim 1 is characterized in that: The burner (21) is provided with a fuel injection nozzle (7), a premixing chamber (26) and a mixing chamber (27) in sequence. The premixing chamber (26) and the mixing chamber (27) are separated by a swirl plate (28). A diffusion plate (30) is provided behind the mixing chamber (27). The volume of the premixing chamber (26) is smaller than that of the mixing chamber (27). The swirl plate (28) is provided with a plurality of swirl air ports (29) for causing the gas entering the mixing chamber (27) to generate a swirl. The edge of the diffusion plate (30) is provided with a plurality of diffusion air ports (31) for causing the gas entering the combustion chamber (23) to generate a trumpet-shaped diffusion. A straight blowing air port (36) is provided in the center of the diffusion plate (30).

3. The novel oil-fired wall-mounted boiler according to claim 1 is characterized in that: The water inlet pipe (4) is connected to the water outlet of the water pump (3), the water inlet of the water pump (3) is connected to the water inlet valve group (35), and the water inlet valve group (35) is also connected to the expansion water tank (9).

4. The novel oil-fired wall-mounted boiler according to claim 3 is characterized in that: The water outlet valve group (18) and the water inlet valve group (35) are also connected via a plate heat exchanger (34).

5. The novel oil-fired wall-mounted boiler according to claim 1 is characterized in that: The water cooling chamber (13) surrounds the burner casing (10).

6. The novel oil-fired wall-mounted boiler according to claim 1 is characterized in that: A condenser (14) is arranged outside the combustion chamber (23). The condenser (14) is connected to the combustion chamber (23) through a smoke port (24) on the back plate. The condenser (14) surrounds the combustion chamber (23) and the top of the condenser (14) is connected to the smoke pipe (12).

7. The novel oil-fired wall-mounted boiler according to claim 6 is characterized in that: The bottom of the condenser (14) is connected to a condensate collector (19) via a condensation pipe (17).

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