Three-way type smoke exhaust air duct and induced draft mechanism for coal-burning furnace

Abstract

The utility model discloses a three -way type smoke exhaust air duct and air induction mechanism for coal stove, and exhaust duct is integrative three -way pipe, contains horizontal connecting pipe and vertical guide pipe, and vertical guide pipe top part smokes, bottom conical close -mouthed collection dust, and is connected detachable dust collection box. In air induction component, the installation sleeve pipe is inserted in the upper portion of vertical guide pipe with 15-30 degree inclination angle, and is internally equipped with axial flow fan, and the flow guide slope of its insertion end guides the airflow, and keeps specific gap with the inner wall of vertical guide pipe. Intelligent control module helps temperature, pressure sensor and embedded controller, and adjusts the rotating speed of axial flow fan according to PID algorithm. The present application realizes efficient smoke exhaust, improves indoor air quality, and is convenient for dust collection and cleaning, and intelligently regulates and controls the operating state, and the structure is stable, provides efficient, intelligent and easy -to -maintain solution for coal stove smoke exhaust, and is suitable for the scene of using coal stove in rural and partial town.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas equipment for coal and wood stoves, specifically to a three-way flue gas duct and induced draft mechanism for coal and wood stoves. Background Technology

[0002] In rural areas and some urban areas, wood-fired stoves are still widely used due to their low cost and readily available fuel. However, the exhaust systems of traditional wood-fired stoves have many problems. On the one hand, ordinary exhaust pipes are simply designed, mostly with curved structures, resulting in low exhaust efficiency and easy ash accumulation. When the smoke and exhaust gases produced by the combustion of wood and coal flow in the pipes, due to the lack of effective guidance and power assistance, exhaust is easily obstructed, leading to indoor smoke filling the room. This not only affects indoor air quality and endangers residents' health, but may also produce harmful gases such as carbon monoxide due to incomplete combustion, creating safety hazards.

[0003] On the other hand, the combustion of coal and wood produces a large amount of dust and particulate matter. Existing flue gas ducts have limited dust handling capacity, and dust easily accumulates inside the ducts, reducing exhaust efficiency and requiring regular cleaning, increasing user costs and maintenance difficulty. Furthermore, traditional exhaust systems lack intelligent control, failing to automatically adjust the operation of the exhaust equipment based on the actual combustion conditions of the coal and wood stove and environmental parameters (such as temperature and pressure) within the exhaust duct, making it difficult to achieve efficient and stable exhaust performance. With the increasing demands for quality of life and environmental protection, developing an efficient, intelligent, and easy-to-maintain coal and wood stove exhaust duct and draft mechanism is of significant practical importance. Utility Model Content

[0004] The present invention aims to solve the above-mentioned technical problems by providing a three-way type flue gas duct and an induced draft mechanism for a coal-fired stove.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a three-way type flue gas duct and induced draft mechanism for a coal-fired stove, comprising:

[0006] The exhaust duct adopts an integrated three-way pipe structure, including a horizontally arranged transverse connecting pipe and a vertical guide pipe connected to one end of the transverse connecting pipe. The top of the vertical guide pipe forms a smoke outlet and the bottom forms a tapered dust collection outlet.

[0007] The air intake assembly includes an inclined mounting sleeve and an axial flow fan. The mounting sleeve is inserted into the upper part of a vertical guide pipe at an inclination angle of 15-30°. The axial flow fan is fixed inside the mounting sleeve by a shock-absorbing bracket. The insertion end of the mounting sleeve forms a downwardly inclined guide slope with an inclination angle of 45-60°.

[0008] In addition, the three-way flue gas duct and induced draft mechanism for coal-fired stoves proposed in this utility model may also have the following additional technical features:

[0009] Furthermore, the outer wall of the mounting sleeve is provided with annular heat dissipation fins.

[0010] Furthermore, it also includes an intelligent control module, which comprises:

[0011] An embedded controller is fixed inside the protective cavity on the outer wall of the mounting sleeve;

[0012] Temperature sensor, installed on the inner wall of the smoke outlet;

[0013] A pressure sensor is located in the middle of the vertical guide tube;

[0014] The embedded controller dynamically adjusts the speed of the axial flow fan using a PID algorithm.

[0015] Furthermore, the lowest point of the guide slope maintains a 5-10mm gap with the inner wall of the vertical guide pipe.

[0016] Furthermore, the cone angle of the dust collection port is 60-80°, and a detachable dust collection box is connected to its bottom. The dust collection box is detachably connected to the vertical guide tube.

[0017] The advantages of this utility model compared with the prior art are as follows:

[0018] 1. The exhaust duct with a three-way pipe structure is rationally designed. The combination of horizontal connecting pipes and vertical guide pipes can effectively guide the flow direction of smoke and exhaust gas. The axial flow fan of the exhaust fan unit works in the installation sleeve at a specific inclined angle, which can generate a strong exhaust force, so that smoke and exhaust gas are quickly discharged outdoors, greatly improving the smoke exhaust efficiency, effectively avoiding indoor smoke, and improving indoor air quality.

[0019] 2. The tapered dust collection port at the bottom of the vertical guide tube and the specific tapered angle design allow the dust generated during combustion to naturally gather together under the action of gravity, making it easy to collect.

[0020] The detachable dust collection box and the vertical guide pipe are easy to connect, allowing users to easily remove the dust collection box for cleaning, reducing maintenance costs and difficulty, and ensuring the long-term stable operation of the smoke exhaust system.

[0021] 3. The intelligent control module gives the entire smoke exhaust system a smart feature. Temperature and pressure sensors can monitor the temperature at the smoke exhaust outlet and the pressure inside the vertical guide pipe in real time.

[0022] The embedded controller dynamically adjusts the speed of the axial flow fan 220 through a PID algorithm. It can automatically adjust the operating status of the axial flow fan according to the actual combustion of the coal-fired stove and the environmental parameters in the flue gas duct, so as to achieve efficient and stable flue gas exhaust effect, while also saving energy and extending the service life of the equipment.

[0023] 4. The exhaust duct adopts an integrated three-way pipe structure, which has good integrity, firm connection, reduces air leakage and other problems, and improves the stability and reliability of the system.

[0024] The axial flow fan is fixed inside the mounting sleeve by a vibration-damping bracket, effectively reducing the impact of vibration during operation on the entire system and ensuring stable system operation. Attached Figure Description

[0025] Figure 1 This is an exploded view of the structure of the three-way type flue gas duct and the induced draft mechanism for a coal-fired stove.

[0026] Figure 2 This is a schematic diagram of the three-way exhaust duct and induced draft mechanism for a coal-fired stove.

[0027] Figure 3 This is a schematic cross-sectional view of the three-way exhaust duct and induced draft mechanism for a coal-fired stove. Figure 1 .

[0028] Figure 4 This is a schematic cross-sectional view of the three-way exhaust duct and induced draft mechanism for a coal-fired stove according to this utility model.

[0029] As shown in the figure: 100, exhaust duct; 110, horizontal connecting pipe; 120, vertical guide pipe; 121, smoke outlet; 122, dust collection port; 123, dust collection box; 200, air intake assembly; 210, mounting sleeve; 211, guide slope; 300, intelligent control module; Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; for those skilled in the art, the specific meaning of the above term in this utility model can be understood according to the specific circumstances.

[0032] The working principle of this utility model:

[0033] This utility model discloses a three-way exhaust duct and induced draft mechanism for a coal-fired stove, mainly comprising an exhaust pipe 100 and an induced draft assembly 200. The exhaust pipe 100 adopts an integrally formed three-way pipe structure, which provides good integrity and stability, effectively reducing air leakage at connections. It includes a horizontally arranged transverse connecting pipe 110 and a vertical guide pipe 120 connected vertically to one end of the transverse connecting pipe 110. The transverse connecting pipe 110 connects to the exhaust port of the coal-fired stove, introducing the smoke and exhaust gas generated by coal combustion into the exhaust duct system. The vertical guide pipe 120 plays a crucial role in expelling the smoke and exhaust gas upwards to the outside. Its top forms a smoke outlet 121, directly communicating with the outdoor atmosphere, and its bottom forms a tapered dust collection port 122. This tapered design facilitates dust accumulation and collection.

[0034] The exhaust fan assembly 200 includes an inclined mounting sleeve 210 and an axial flow fan 220. The mounting sleeve 210 is inserted into the upper part of the vertical guide duct 120 at an angle of 15-30°. This angle is carefully designed. On the one hand, it allows the airflow generated by the axial flow fan 220 to mix better with the smoke and exhaust gas inside the vertical guide duct 120, enhancing the exhaust effect; on the other hand, it to some extent prevents damage to the axial flow fan 220 from excessive hot airflow. The axial flow fan 220 is fixed inside the mounting sleeve 210 by a vibration damping bracket 221. The vibration damping bracket 221 effectively reduces the impact of vibrations generated by the axial flow fan 220 during operation on the mounting sleeve 210 and the entire exhaust duct system, ensuring stable system operation. The insertion end of the mounting sleeve 210 forms a downward-sloping guide slope 211 with an inclination angle of 45-60°. The design of the guide slope 211 has multiple functions. It can guide the airflow blown out by the axial flow fan 220 to tilt downwards, so as to better mix with the smoke and exhaust gas in the vertical guide pipe 120 and enhance the ventilation effect. At the same time, the lowest point of the guide slope 211 maintains a gap of 5-10mm with the inner wall of the vertical guide pipe 120. This gap setting can ensure the smooth flow of airflow and prevent problems such as poor ventilation effect due to excessive gap or friction due to insufficient gap.

[0035] The dust collection port 122 has a conical angle of 60-80°, which allows dust to more easily accumulate under gravity. A detachable dust collection box 123 is connected to its bottom, and the dust collection box 123 is detachably connected to the vertical guide tube 120. When a certain amount of dust has been collected in the dust collection box 123, the user can easily remove the dust collection box 123 for cleaning. After cleaning, the vertical guide tube 120 can be reinstalled, greatly improving the convenience of dust cleaning.

[0036] This utility model also includes an intelligent control module 300. The intelligent control module 300 includes an embedded controller, a temperature sensor, and a pressure sensor. The embedded controller is fixed within a protective cavity on the outer wall of the mounting sleeve. This protective cavity protects the embedded controller from external environmental factors such as dust and moisture, ensuring its stable operation. The temperature sensor is located on the inner wall of the exhaust port 112 to monitor the temperature of the flue gas from the coal-fired boiler in real time. The pressure sensor is located in the middle of the vertical guide pipe 120 to monitor the pressure within the vertical guide pipe 120. The embedded controller dynamically adjusts the speed of the axial flow fan 220 using a PID algorithm. When the temperature sensor detects that the exhaust gas temperature is too high or the pressure sensor detects abnormal pressure within the vertical guide pipe 120, the embedded controller calculates a suitable speed for the axial flow fan 220 based on the PID algorithm and controls the axial flow fan 220 to adjust its speed accordingly, ensuring that the exhaust system is always in optimal operating condition.

[0037] Implementation

[0038] Installation process

[0039] First, connect one end of the horizontal connecting pipe 110 to the exhaust port of the coal stove. The connection can be made using a combination of sealing rings and fastening bolts to ensure a tight, leak-proof connection. During the connection process, pay attention to the horizontal alignment of the horizontal connecting pipe 110 to ensure it can properly guide smoke and exhaust gas into the exhaust duct system.

[0040] Next, vertically connect the vertical guide pipe 120 to the other end of the horizontal connecting pipe 110. During connection, ensure the joint is sealed; sealant can be used for this purpose. The vertical guide pipe 120 must be installed vertically to ensure that smoke and exhaust gases can be smoothly discharged upwards.

[0041] Next, install the air intake assembly 200. According to design requirements, insert the installation sleeve 210 into the upper part of the vertical guide pipe 120 at an angle of 15-30°. During insertion, pay attention to adjusting the position of the installation sleeve 210 so that the lowest point of the guide slope 211 maintains a 5-10mm gap with the inner wall of the vertical guide pipe 120. After installation, fix the axial flow fan 220 inside the installation sleeve 210 using the anti-vibration bracket 221, ensuring that the axial flow fan 220 is securely installed and operates smoothly.

[0042] Install the dust collection structure. Connect the dust collection box 123 to the dust collection port 122 at the bottom of the vertical guide tube 120. The connection method can be a detachable connection such as a threaded connection or a snap-fit ​​connection, which is convenient for users to clean the dust collection box 123 later.

[0043] Finally, install the intelligent control module 300. Fix the embedded controller to the protective cavity on the outer wall of the mounting sleeve, ensuring the cavity is well-sealed to effectively protect the embedded controller. Install the temperature sensor on the inner wall of the exhaust port 112 and the pressure sensor in the middle of the vertical guide tube 120. After installation, connect the wiring between each sensor and the embedded controller, ensuring the connections are correct and secure.

[0044] Usage process

[0045] When the coal-fired stove starts burning, the smoke and exhaust gases produced enter the exhaust duct system through the horizontal connecting pipe 110. Inside the horizontal connecting pipe 110, the smoke and exhaust gases enter the vertical guide pipe 120.

[0046] At this time, the exhaust fan assembly 200 begins to operate. The axial flow fan 220 operates within the mounting sleeve 210, generating a powerful airflow. Guided by the guide slope 211, the airflow slopes downwards, fully mixing with the smoke and exhaust gas within the vertical guide duct 120, forming a powerful exhaust force that quickly discharges the smoke and exhaust gas outdoors.

[0047] During the smoke extraction process, a temperature sensor monitors the temperature at the smoke exhaust port 112 in real time, and a pressure sensor monitors the pressure in the middle of the vertical guide pipe 120 in real time. The sensors transmit the monitored data to the embedded controller. The embedded controller analyzes and processes the data according to a PID algorithm. When it detects that the temperature is too high or the pressure is abnormal, it automatically adjusts the speed of the axial fan 220 to ensure the stable operation of the smoke extraction system.

[0048] The ash produced by combustion flows downwards along the inner wall of the vertical guide tube 120 under the influence of gravity and accumulates at the dust collection port 122. Due to the tapered design of the dust collection port 122, the dust gradually accumulates in the dust collection box 123. When the user finds that there is a lot of dust in the dust collection box 123, the dust collection box 123 can be removed from the vertical guide tube 120 for cleaning, and then reinstalled after cleaning.

[0049] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A tee type exhaust air duct for a wood-burning stove and a draft inducer, characterized in that: include: The exhaust duct (100) adopts an integrally formed three-way pipe structure, including a horizontally arranged transverse connecting pipe (110) and a vertical guide pipe (120) connected to one end of the transverse connecting pipe (110). The top of the vertical guide pipe (120) forms a smoke outlet (121) and the bottom forms a tapered dust collection port (122). The air intake assembly (200) includes an inclined mounting sleeve (210) and an axial flow fan (220). The mounting sleeve (210) is inserted into the upper part of the vertical guide pipe (120) at an inclination angle of 15-30°. The axial flow fan (220) is fixed inside the mounting sleeve (210) by a shock-absorbing bracket (221). The insertion end of the mounting sleeve (210) forms a downwardly inclined guide slope (211), and the inclination angle of the guide slope (211) is 45-60°.

2. The tee type flue and induced draft duct for coal-burning stoves according to claim 1, characterized in that: The outer wall of the mounting sleeve (210) is provided with annular heat dissipation fins.

3. The tee-typed flue and induced draft duct for a coal-burning stove according to claim 1, wherein: It also includes an intelligent control module (300), which includes: An embedded controller is fixed inside the protective cavity on the outer wall of the mounting sleeve; A temperature sensor is installed on the inner wall of the smoke outlet (121); A pressure sensor is located in the middle of the vertical guide tube (120); The embedded controller dynamically adjusts the speed of the axial flow fan (220) using a PID algorithm.

4. The tee-typed flue and induced draft duct for coal-burning stoves according to claim 1, characterized in that: The lowest point of the guide slope (211) maintains a 5-10 mm gap with the inner wall of the vertical guide pipe (120).

5. The tee-typed flue and induced draft duct for a coal-burning stove according to claim 4, wherein: The dust collection port (122) has a conical angle of 60-80° and a detachable dust collection box (123) is connected to its bottom. The dust collection box (123) is detachably connected to the vertical guide pipe (120).

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