A stove smoke exhaust pipeline assisted smoke exhaust device

Abstract

The application discloses a kind of stove with smoke exhaust pipeline power exhaust device, including shell, the total smoke inlet and total smoke outlet are separately possessed in the both ends of the shell, the inner chamber of the shell is provided with baffle along the direction of airflow, the baffle is divided into first chamber and second chamber by the inner chamber of the shell;The first chamber has first sub-inlet and first sub-outlet in both ends;The second chamber has second sub-inlet and second sub-outlet;Impeller is arranged in the second chamber, the impeller is connected power part to drive the rotation of the impeller, to the flue gas in the first chamber from second sub-inlet is inhaled impeller, and high-pressure gas is formed from second sub-outlet after gas is accelerated along radial direction by impeller rotation and is discharged.The application retains the characteristics of axial flow type smoke exhaust fan installation convenient, while having the advantages of centrifugal type smoke exhaust fan stronger high-temperature resistance, high air pressure, strong resistance, when shutdown first chamber normal exhaust, do not affect the strength of the chimney effect of smoke exhaust pipeline, effectively improve ventilation efficiency, its structure is stable, and operation reliability is high.

Description

Technical Field

[0001] This invention patent relates to the field of ventilation and air exchange technology, and in particular to a smoke exhaust pipe aid device for stoves. Background Technology

[0002] Existing boilers, such as biomass boilers, steam boilers, coal-fired boilers, gas-fired boilers, and wood-fired boilers, rely on the thermal buoyancy of flue gas and outdoor wind pressure for natural flue gas exhaust. However, insufficient buoyancy and unstable wind pressure can easily lead to poor flue gas exhaust, backflow of smoke, and reduced combustion efficiency. Therefore, it is necessary to install exhaust fans in the ductwork to mechanically force exhaust air and ensure rapid exhaust of flue gas, which is especially suitable for duct systems with long exhaust paths and many bends.

[0003] Existing smoke exhaust fans mainly include axial flow and centrifugal structures. While axial flow smoke exhaust fans have advantages such as compact structure, convenient installation, and large air volume, they also have some obvious disadvantages in practical applications, especially under special working conditions, which require special attention:

[0004] Motors are susceptible to the effects of high-temperature flue gas: Axial flow fans typically use built-in motors, with flue gas flowing directly through the motor area. In high-temperature environments during a fire (such as continuous operation at 280°C), the motor's lifespan and reliability decrease significantly, making it prone to failure. Furthermore, the built-in motor increases the resistance of the exhaust duct, affecting the strength of the chimney effect.

[0005] Low air pressure limits applicability: Axial flow fans perform well in low-pressure, high-flow scenarios, but when it is necessary to overcome high pipe resistance or long-distance smoke exhaust, the air pressure is insufficient, the efficiency drops significantly, and the noise is relatively high.

[0006] Poor flow regulation flexibility: Although some adjustable blade models can adjust the air volume, the overall adjustment range and response speed are not as good as centrifugal fans, making it difficult to adapt to complex and ever-changing smoke exhaust needs.

[0007] In summary, axial flow exhaust fans are more suitable for applications with low resistance, large air volume, and less demanding requirements for noise and high temperature resistance; if the system resistance is high, reliability requirements are high, or there is a risk of high-temperature flue gas, centrifugal exhaust fans are usually a more reliable choice.

[0008] However, centrifugal exhaust fans, due to their spiral structure, alter the flow direction of the medium within the duct. Therefore, installation requires advance planning of the installation location, and a separate outlet duct needs to be installed to connect with the exhaust duct, making installation inconvenient. Furthermore, when shut down, the centrifugal exhaust fan impeller increases the resistance of the exhaust duct, affecting the strength of the chimney effect. Therefore, how to improve the operating efficiency, stability, and overall system performance of the fan through rational design is a pressing issue that needs to be addressed in this field. Summary of the Invention

[0009] The purpose of this invention patent is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a smoke exhaust pipe assist device for stoves.

[0010] The objective of this invention patent is achieved through the following technical solution:

[0011] A flue gas exhaust pipe assist device for stoves includes a housing, with a main smoke inlet and a main smoke outlet at both ends of the housing, and a partition is provided in the inner cavity of the housing along the airflow direction, the partition dividing the inner cavity of the housing into a first chamber and a second chamber;

[0012] The first chamber has a first branch smoke inlet and a first branch smoke outlet at both ends. The first branch smoke inlet is connected to the main smoke inlet, and the first branch smoke outlet is connected to the main smoke outlet. The cross-sectional area through which the airflow passes in the first chamber is greater than the cross-sectional area through which the airflow passes in the second chamber.

[0013] The second chamber has a second smoke inlet and a second smoke outlet. The second smoke inlet is opened on the partition to communicate with the first chamber. The second smoke outlet is opened in the direction of the main smoke outlet and communicates with the main smoke outlet. The cross-sectional area through which the airflow passes in the second smoke inlet is larger than the cross-sectional area through which the airflow passes in the second smoke outlet.

[0014] An impeller is provided in the second chamber. The impeller is connected to a power unit to drive the impeller to rotate, so that the flue gas in the first chamber is drawn into the impeller from the second flue gas inlet. After the gas is accelerated radially by the rotation of the impeller, it forms high-pressure gas and is discharged from the second flue gas outlet.

[0015] As a preferred embodiment of the above technical solution, the cross-sectional area through which the airflow passes in the first chamber is not less than 2 / 3 of the total cross-sectional area through which the airflow passes in the inner cavity of the shell.

[0016] As a preferred embodiment of the above technical solution, the shell is square or cylindrical.

[0017] As a preferred embodiment of the above technical solution, one side of the housing has a detachable side plate to clean the inner cavity of the housing after the side plate is removed.

[0018] As a preferred embodiment of the above technical solution, the inner cavity of the housing is equipped with a temperature sensor so that the impeller stops rotating when the inner cavity of the housing reaches a preset temperature.

[0019] As a preferred embodiment of the above technical solution, when the shell is square, baffles are provided at the four corners of the inner cavity of the second chamber, so that a volute structure inner cavity is formed between the second chamber and the second smoke inlet and the second smoke outlet.

[0020] As a preferred embodiment of the above technical solution, the main smoke inlet and the main smoke outlet are equipped with quick-connect devices for connecting to the smoke exhaust pipe.

[0021] As a preferred embodiment of the above technical solution, the second flue gas inlet is located at the center of the baffle plate and coaxial with the center of the impeller.

[0022] The flue gas exhaust system for stoves proposed in this invention can be installed by connecting it to the exhaust gas exhaust pipe through the main exhaust port and the main exhaust port. It can be installed vertically or horizontally. It retains the easy installation characteristics of axial flow exhaust fans, while also having the advantages of centrifugal exhaust fans, such as stronger high temperature resistance, high wind pressure, and strong resistance. When the machine is stopped, the first chamber exhausts smoke normally without affecting the strength of the chimney effect of the exhaust gas exhaust pipe, effectively improving ventilation efficiency. Its structure is stable and its operation is highly reliable. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of the auxiliary smoke exhaust device for stove exhaust pipes provided in this invention patent;

[0025] Figure 2 for Figure 1 The left view;

[0026] Figure 3 for Figure 1 The right view;

[0027] Figure 4 for Figure 1 A three-dimensional image;

[0028] Figure 5 for Figure 1 The other side of the 3D view;

[0029] Figure 6 for Figure 1 Exploded view;

[0030] Figure 7 for Figure 1 Reference: Side panel 3D diagram;

[0031] Figure 8 for Figure 7 The other side of the 3D view. Detailed Implementation

[0032] In the description of this invention patent, it should be understood that the terms "left," "right," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this invention patent. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this invention patent, unless otherwise stated, "a plurality of" means two or more.

[0033] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of this invention.

[0034] like Figures 1 to 8 As shown, a flue gas exhaust pipe assist device for stoves includes a housing 1. The housing has a total smoke outlet 10 and a total smoke inlet 9 at its left and right ends, respectively. A partition 2 is provided in the inner cavity of the housing along the airflow direction, and the partition divides the inner cavity of the housing into a first chamber 4 and a second chamber 3.

[0035] The first chamber 4 has a first branch smoke inlet and a first branch smoke outlet at its left and right ends, respectively. The first branch smoke inlet is connected to the main smoke inlet 9, and the first branch smoke outlet is connected to the main smoke outlet 10. The airflow cross-sectional area of ​​the first chamber is larger than that of the second chamber. The airflow cross-sectional area of ​​the first chamber is not less than 2 / 3 of the overall airflow cross-sectional area of ​​the inner cavity of the shell so as not to affect the passage of smoke.

[0036] The second chamber 3 has a second smoke inlet 5 and a second smoke outlet 6. The second smoke inlet 5 is opened on the partition 5 to communicate with the first chamber. The second smoke outlet 6 is opened in the direction of the main smoke outlet 10 and communicates with the main smoke outlet 10. The airflow cross-sectional area of ​​the second smoke inlet 5 is larger than the airflow cross-sectional area of ​​the second smoke outlet 6.

[0037] An impeller 7 is provided in the second chamber. The impeller is connected to a power unit 8 to drive the impeller to rotate, so as to draw the flue gas in the first chamber into the impeller from the second flue gas inlet. After the gas is accelerated radially by the rotation of the impeller, it forms high-pressure gas and is discharged from the second flue gas outlet. The power unit 8 is a motor.

[0038] The shell is square or round. When the shell is square, baffles 11 are provided at the four corners of the inner cavity of the second chamber 3 so that a volute structure inner cavity is formed between the second chamber and the second smoke inlet and the second smoke outlet.

[0039] The housing has a detachable side plate 12 on one side for cleaning the inner cavity of the housing after the side plate is removed.

[0040] The housing cavity has a temperature sensor (not shown in the figure) so that when the housing cavity reaches a preset temperature, the controller (not shown in the figure) controls the power unit 8 to drive the impeller to stop rotating. The controller is connected to the temperature sensor and the motor.

[0041] The main smoke inlet and main smoke outlet have quick-connect devices for connecting to the smoke exhaust pipe. The quick-connect devices are flange connections, but existing structures can also be used for quick connection to the smoke exhaust pipe.

[0042] The flue gas exhaust system for stoves proposed in this invention can be connected to the exhaust gas exhaust system via the main exhaust port 10 and the main exhaust port 9 during installation. It can be installed vertically or horizontally. It retains the easy installation characteristics of axial flow exhaust fans, while also possessing the advantages of centrifugal exhaust fans, such as stronger high temperature resistance, high wind pressure, and strong resistance. When the machine is stopped, the first chamber exhausts smoke normally without affecting the strength of the chimney effect of the exhaust gas exhaust system, effectively improving ventilation efficiency. Its structure is stable and its operation is highly reliable.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of this invention as claimed.

Claims

1. A flue gas exhaust assist device for stoves, characterized in that, The shell includes a main smoke inlet and a main smoke outlet at both ends. A partition is provided in the inner cavity of the shell along the airflow direction, and the partition divides the inner cavity of the shell into a first chamber and a second chamber. The first chamber has a first branch smoke inlet and a first branch smoke outlet at both ends. The first branch smoke inlet is connected to the main smoke inlet, and the first branch smoke outlet is connected to the main smoke outlet. The cross-sectional area through which the airflow passes in the first chamber is greater than the cross-sectional area through which the airflow passes in the second chamber. The second chamber has a second smoke inlet and a second smoke outlet. The second smoke inlet is opened on the partition to communicate with the first chamber. The second smoke outlet is opened in the direction of the main smoke outlet and communicates with the main smoke outlet. The cross-sectional area through which the airflow passes in the second smoke inlet is larger than the cross-sectional area through which the airflow passes in the second smoke outlet. An impeller is provided in the second chamber. The impeller is connected to a power unit to drive the impeller to rotate, so that the flue gas in the first chamber is drawn into the impeller from the second flue gas inlet. After the gas is accelerated radially by the rotation of the impeller, it forms high-pressure gas and is discharged from the second flue gas outlet.

2. The stove exhaust pipe-assisted exhaust device according to claim 1, characterized in that, The cross-sectional area through which the airflow passes in the first chamber is not less than 2 / 3 of the total cross-sectional area through which the airflow passes in the inner cavity of the shell.

3. The flue gas exhaust pipe-assisted exhaust device for stoves according to claim 1, characterized in that, The shell is square or cylindrical.

4. The flue gas exhaust pipe-assisted exhaust device for stoves according to claim 1, characterized in that, The housing has a removable side plate on one side to allow for cleaning of the housing cavity after the side plate is removed.

5. The flue gas exhaust pipe-assisted exhaust device for stoves according to claim 1, characterized in that, The housing cavity is equipped with a temperature sensor so that the impeller stops rotating when the housing cavity reaches a preset temperature.

6. The stove exhaust pipe-assisted exhaust device according to claim 3, characterized in that, When the shell is square, baffles are provided at the four corners of the second chamber so that a volute structure is formed between the second chamber and the second smoke inlet and the second smoke outlet.

7. The stove exhaust pipe-assisted exhaust device according to claim 1, characterized in that, The main smoke inlet and main smoke outlet are equipped with quick-connect devices for connecting to the smoke exhaust pipe.

8. The stove exhaust pipe-assisted exhaust device according to claim 1, characterized in that, The second flue gas inlet is located at the center of the baffle plate and coaxial with the center of the impeller.

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