Smoke exhaust fan for chimney

Abstract

The utility model provides a chimney smoke exhaust fan, and belongs to the technical field of smoke exhaust fans. The problem that a motor of an existing smoke exhaust fan is prone to damage is solved. The chimney smoke exhaust fan comprises a cylindrical shell, the interior of the shell is divided into a smoke exhaust cavity and a mounting cavity through a partition plate assembly, a motor is fixedly connected into the mounting cavity, an output shaft of the motor penetrates through the partition plate assembly and extends into the smoke exhaust cavity, and the outer end of the output shaft is fixedly connected with a first impeller; the outer circumferential wall of the shell is provided with a plurality of smoke outlet holes opposite to the first impeller, the outer circumferential wall of the shell is further provided with a plurality of first heat dissipation holes, the first heat dissipation holes are located between the smoke outlet holes and the partition plate assembly, all the first heat dissipation holes define a plurality of circles in the circumferential direction of the shell, and the first heat dissipation holes in every two adjacent circles are arranged in a staggered mode. The chimney smoke exhaust fan has the advantage of being long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of smoke exhaust fans and relates to a chimney smoke exhaust fan. Background Art

[0002] The casing usually refers to the piping system used to discharge smoke, hot air or harmful gases generated during the combustion process. It is used in many fields, mainly including kitchen exhaust, industrial exhaust and heating systems.

[0003] The existing shell, for example, Chinese patent literature discloses a smoke exhaust device [patent number: 202311510266.6; application publication number: CN117387092A], which includes a shell and a fan, a smoke inlet is provided at one end of the shell, and a partition plate is provided in the shell corresponding to the smoke inlet; the partition plate divides the interior of the shell into a smoke exhaust chamber and a motor chamber, and the shell is provided with a plurality of smoke outlets; the fan includes a motor and a fan disc, the fan disc includes a plurality of fan blades, the fan blade includes a first guide surface and a second guide surface, the first guide surface faces the smoke inlet, and the second guide surface guides the airflow to the smoke outlet; the plurality of smoke outlets are evenly distributed along the circumference of the shell; the fan disc includes an air inlet and an air outlet, and the air inlet corresponds to the smoke inlet, and the air outlet corresponds to the plurality of smoke outlets.

[0004] The smoke exhaust device of this structure improves the smoke exhaust efficiency and controllability by arranging a fan in the shell, and divides the cavity inside the shell into a smoke exhaust chamber and a motor chamber by a partition plate, thereby separating the smoke and the motor. Although the partition plate plays a certain role in heat insulation, it still cannot prevent the heat of the smoke from entering the motor chamber, causing the motor to heat up too quickly, making the motor easily damaged, thereby reducing the service life of the smoke exhaust device. Summary of the invention

[0005] The utility model aims to solve the above problems existing in the prior art and proposes a chimney smoke exhaust fan, and solves the technical problem of how to prolong the service life of the smoke exhaust fan.

[0006] The objectives of the utility model can be achieved through the following technical solutions: a chimney smoke exhaust fan, comprising a cylindrical outer shell, the interior of the outer shell is partitioned into a smoke exhaust chamber and an installation chamber by a partition plate assembly, a motor is fixedly connected in the installation chamber, the output shaft of the motor passes through the partition plate assembly and extends into the smoke exhaust chamber, the outer end of the output shaft is fixedly connected to a first impeller, the outer peripheral wall of the outer shell is provided with a plurality of smoke outlet holes arranged opposite to the first impeller, and it is characterized in that the outer peripheral wall of the outer shell is also provided with a plurality of first heat dissipation holes, the first heat dissipation holes are located between the smoke outlet holes and the partition plate assembly, all of the first heat dissipation holes are arranged in a plurality of circles along the circumference of the outer shell, and the first heat dissipation holes in two adjacent circles are staggered.

[0007] The motor can drive the first impeller to rotate through the output shaft, so that the shell can better extract the smoke and discharge the smoke through the smoke outlet. The smoke has heat, and heat transfer occurs during the smoke exhaust process, which will heat the shell. This arrangement of the first heat dissipation hole hollows out the area of ​​the shell between the smoke outlet and the partition plate assembly, making the heat transfer route curved. Compared with the straight-line heat transfer, the transfer distance is increased, thereby reducing the heat transfer to the installation cavity, which can effectively reduce the heating rate of the motor, making the motor less likely to be damaged and increasing the service life of the smoke exhaust fan. The partition plate assembly includes a fixedly installed plate body and heat insulation cotton for heat insulation, and the partition plate assembly has a heat insulation effect.

[0008] In the chimney smoke exhaust fan described above, the first heat dissipation hole is in the shape of an elongated strip, and the length direction of the first heat dissipation hole is arranged along the circumference of the shell. This structure can better extend the transfer path, thereby reducing the heat transfer to the installation cavity.

[0009] In the above-mentioned chimney smoke exhaust fan, a second impeller is fixedly connected to the middle of the output shaft, the second impeller is located in the smoke exhaust cavity, and the second impeller is arranged opposite to the first heat dissipation hole. The output shaft can drive the second impeller to rotate. The second impeller firstly assists the first impeller to drive the remaining smoke to be discharged from the first heat dissipation hole, and secondly, the second impeller rotates to generate wind, which can effectively reduce the heat of the shell and reduce the heat transfer of the shell to the installation cavity, which can effectively reduce the heating rate of the motor, make the motor less likely to be damaged, and increase the service life of the smoke exhaust fan.

[0010] In the above-mentioned chimney smoke exhaust fan, the first impeller includes a plurality of first blades, which are arranged toward the smoke inlet of the shell, and the second impeller includes a plurality of second blades, which are arranged away from the smoke inlet of the shell. This structure enables the first impeller to better suck smoke into the shell and then discharge it from the smoke outlet, and enables the second impeller to better draw back the smoke flowing to the installation cavity and then discharge it from the first heat dissipation hole, so that the smoke can be better discharged and will not flow to the installation cavity, reducing the heat transfer to the installation cavity, which can effectively reduce the heating rate of the motor, making the motor less likely to be damaged, and prolonging the service life of the smoke exhaust fan.

[0011] In the chimney smoke exhaust fan described above, the surface area of ​​the first blade is greater than the surface area of ​​the second blade, and the sum of the surface areas of all the first blades is much greater than the sum of the surface areas of all the second blades. The first impeller plays a major role, and the second impeller plays an auxiliary role. The design is reasonable, so that the smoke exhaust fan is stable.

[0012] In the above-mentioned chimney smoke exhaust fan, a heat insulation board assembly is also fixedly connected to the shell, and the heat insulation board assembly is located in the smoke exhaust cavity, and the heat insulation board assembly is located between the second impeller and the partition board assembly, and the first heat dissipation hole is located between the smoke outlet and the heat insulation board assembly. The heat insulation board assembly plays a role of heat insulation, and cooperates with the partition board assembly to play a role of double-layer heat insulation, reducing the heat of the flue gas transferred to the installation cavity, which can effectively reduce the heating rate of the motor and make the motor less likely to be damaged. The heat insulation board assembly includes a fixedly installed plate body and heat insulation cotton for heat insulation, and the heat insulation board assembly has a heat insulation effect.

[0013] In the chimney exhaust fan, there is a distance between the heat insulation board assembly and the partition board assembly. Air is present in the distance, and the air is not easy to conduct heat, so it plays a better role in heat insulation, reduces the heat transfer to the installation cavity, and can effectively reduce the heating speed of the motor, making the motor less likely to be damaged, thereby increasing the service life of the exhaust fan.

[0014] In the above-mentioned chimney smoke exhaust fan, the shell is further provided with a plurality of second heat dissipation holes, the second heat dissipation holes are connected to the installation cavity, the shell is arranged horizontally, and the second heat dissipation holes are located at the bottom of the shell. The second heat dissipation holes discharge the heat generated by the motor when it is working, effectively reducing the heating rate of the motor, and at the same time, water droplets generated by temperature changes can be discharged to avoid motor short circuit, and at the same time, foreign impurities are not easy to enter the installation cavity, so that the motor is not easy to be damaged, and the service life of the smoke exhaust fan is increased.

[0015] In the chimney smoke exhaust fan described above, the smoke exhaust fan further includes a wire, the wire is attached to the outer wall of the shell along the axial direction of the shell, and a spacer is provided between two adjacent smoke outlets, and the wire is fixedly connected to the shell by a clamping ring arranged outside the spacer and the wire. This structure improves the installation firmness of the wire, and the wire avoids the smoke outlet, so that the wire is not easily damaged; the spacer used for fixing the wire can be thicker than other spacers.

[0016] In the above-mentioned chimney smoke exhaust fan, the smoke exhaust fan further comprises a connecting ring, which is sleeved and fixed outside the shell. The connecting ring plays a role of fixed connection, so that the shell can be installed at the position of smoke exhaust.

[0017] In the chimney smoke exhaust fan, a third impeller is fixedly connected to the output shaft of the motor, and the third impeller is located in the installation cavity. The third impeller is used to cool the motor so that the temperature of the motor will not be too high.

[0018] Compared with the prior art, the chimney smoke exhaust fan provided by the utility model has the following advantages:

[0019] 1. The smoke exhaust fan is provided with a heat insulation board assembly, and there is a distance between the heat insulation board assembly and the partition board assembly, so as to reduce the heat transfer of the smoke to the installation cavity, which can effectively reduce the heating rate of the motor, make the motor less likely to be damaged, and increase the service life of the smoke exhaust fan.

[0020] 2. The smoke exhaust fan is connected to the second impeller in the middle of the output shaft, and a first heat dissipation hole is provided relative to the second impeller, so that excess smoke can be better discharged from the casing, reducing the heat of the smoke transferred to the installation cavity, which can effectively reduce the heating rate of the motor, making the motor less likely to be damaged and increasing the service life of the smoke exhaust fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of the overall structure of the smoke exhaust fan.

[0022] Figure 2 It is a schematic diagram of the overall structure of the smoke exhaust fan.

[0023] Figure 3 It is a schematic diagram of the overall structure of this shell.

[0024] Figure 4 It is a structural schematic diagram of the motor, the first impeller and the second impeller of the smoke exhaust fan.

[0025] In the figure, 1, outer shell; 1a, smoke inlet; 2, partition plate assembly; 3, smoke exhaust chamber; 4, installation chamber; 5, motor; 6, output shaft; 7, first impeller; 71, first blade; 8, smoke outlet; 9, heat insulation board assembly; 10, second impeller; 101, second blade; 11, first heat dissipation hole; 12, second heat dissipation hole; 13, wire; 14, spacer; 15, clamping ring; 16, connecting ring; 17, third impeller. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0027] like Figure 1 , Figure 2 As shown, the smoke exhaust fan includes a housing 1, a partition plate assembly 2, a motor 5, an output shaft 6, a first impeller 7, a heat insulation plate assembly 9 and a second impeller 10.

[0028] The housing 1 is cylindrical, and the interior of the housing 1 is divided into a smoke exhaust chamber 3 and a mounting chamber 4 by a partition plate assembly 2. A motor 5 is fixedly connected to the mounting chamber 4, and an output shaft 6 of the motor 5 passes through the partition plate assembly 2 and extends into the smoke exhaust chamber 3. Figure 4As shown, the outer end of the output shaft 6 is fixedly connected to the first impeller 7, and the middle part of the output shaft 6 is fixedly connected to the second impeller 10. When fixed, two positioning sleeves are arranged on the outer surface of the output shaft 6, so that the second impeller 10 is pressed and fixed between the two positioning sleeves, and then a nut is sleeved on the outer end of the output shaft, so that the first impeller 7 is fixed between the nut and one of the positioning sleeves. In this embodiment, the first impeller 7 includes six first blades 71, and the first blades 71 are arranged toward the smoke inlet 1a of the shell 1. The second impeller 10 includes ten second blades 101, and the second blades 101 are arranged away from the smoke inlet 1a of the shell 1. The surface area of ​​the first blade 71 is greater than the surface area of ​​the second blade 101, and the sum of the surface areas of all the first blades 71 is much greater than the sum of the surface areas of all the second blades 101. In actual production, the number of the first blades 71 can be three or eight, and the number of the second blades 101 can be six or twelve. The other end of the shell 1 relative to the smoke inlet 1a is fixedly connected to a cover plate, and a sealing ring is provided between the cover plate and the shell.

[0029] The housing 1 is also fixedly connected with a heat shield assembly 9, the heat shield assembly 9, the first impeller 7 and the second impeller 10 are all located in the smoke exhaust chamber 3, the heat shield assembly 9 is located between the second impeller 10 and the partition assembly 2, and there is a distance between the heat shield assembly 9 and the partition assembly 2. The output shaft 6 of the motor 5 is also fixedly connected with a third impeller 17, and the third impeller 17 is located in the installation chamber 4.

[0030] In this embodiment, the outer wall of the shell 1 has twelve smoke outlet holes 8 arranged opposite to the first impeller 7, the smoke outlet holes 8 are in the shape of long strips, and the length direction of the smoke outlet holes 8 is arranged along the axial direction of the shell 1. The outer wall of the shell 1 has thirty-six first heat dissipation holes 11 arranged opposite to the second impeller 10, the first heat dissipation holes 11 are in the shape of long strips, and the length direction of the first heat dissipation holes 11 is arranged along the circumference of the shell 1, all the first heat dissipation holes 11 are arranged in three circles along the circumference of the shell 1, and the first heat dissipation holes 11 in two adjacent circles are staggered. In actual production, the number of smoke outlet holes 8 can be eight or sixteen, the number of first heat dissipation holes 11 can be twenty-four or forty-eight, and all the first heat dissipation holes 11 can be arranged in two circles or four circles.

[0031] like Figure 3 As shown, in this embodiment, the shell 1 also has five second heat dissipation holes 12, the second heat dissipation holes 12 are in the shape of long strips, and the second heat dissipation holes 12 are arranged along the axial direction of the shell 1, the second heat dissipation holes 12 are connected to the installation cavity 4, the shell 1 is arranged horizontally, and the second heat dissipation holes 12 are located at the bottom of the shell 1. In actual production, the number of the second heat dissipation holes 12 can be three or seven.

[0032] The smoke exhaust fan also includes a wire 13 and a connecting ring 16. The wire 13 is attached to the outer wall of the shell 1 along the axial direction of the shell 1. A partition bar 14 is provided between two adjacent smoke outlets 8. The wire 13 is fixedly connected to the shell 1 by a clamping ring 15 which is sleeved outside the partition bar 14 and the wire 13. The connecting ring 16 is sleeved and fixed outside the shell 1.

[0033] During operation, the motor 5 is started and drives the first impeller 7 and the second impeller 10 to rotate through the output shaft 6. The first impeller 7 sucks the smoke into the housing 1 and discharges it through the smoke outlet 8. The second impeller 10 sucks the smoke flowing to the insulation board assembly 9 and discharges it from the first heat dissipation hole 11.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although the present invention uses more terms such as housing 1, smoke inlet 1a, partition plate assembly 2, smoke exhaust chamber 3, installation chamber 4, motor 5, output shaft 6, first impeller 7, first blade 71, smoke outlet 8, heat shield assembly 9, second impeller 10, second blade 101, first heat dissipation hole 11, second heat dissipation hole 12, wire 13, spacer 14, collar 15, connecting ring 16, third impeller 17, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A chimney smoke exhaust fan, comprising a cylindrical shell (1), the interior of the shell (1) being divided into a smoke exhaust chamber (3) and a mounting chamber (4) by a partition plate assembly (2), a motor (5) being fixedly connected to the mounting chamber (4), an output shaft (6) of the motor (5) passing through the partition plate assembly (2) and extending into the smoke exhaust chamber (3), a first impeller (7) being fixedly connected to the outer end of the output shaft (6), a plurality of smoke outlet holes (8) being arranged opposite to the first impeller (7) on the outer peripheral wall of the shell (1), characterized in that: The outer peripheral wall of the shell (1) is also provided with a plurality of first heat dissipation holes (11), the first heat dissipation holes (11) being located between the smoke outlet (8) and the partition plate assembly (2), all of the first heat dissipation holes (11) forming a plurality of circles along the circumference of the shell (1), and the first heat dissipation holes (11) in two adjacent circles being staggered.

2. A chimney smoke exhaust fan according to claim 1, characterized in that: The first heat dissipation holes (11) are in the shape of long strips, and the length direction of the first heat dissipation holes (11) is arranged along the circumference of the housing (1).

3. A chimney smoke exhaust fan according to claim 1, characterized in that: A second impeller (10) is fixedly connected to the middle of the output shaft (6); the second impeller (10) is located in the smoke exhaust chamber (3); and the second impeller (10) is arranged opposite to the first heat dissipation hole (11).

4. A chimney smoke exhaust fan according to claim 3, characterized in that: The first impeller (7) comprises a plurality of first blades (71), the first blades (71) being arranged toward the smoke inlet (1a) of the housing (1), and the second impeller (10) comprises a plurality of second blades (101), the second blades (101) being arranged away from the smoke inlet (1a) of the housing (1).

5. A chimney smoke exhaust fan according to claim 4, characterized in that: The surface area of ​​the first blade (71) is greater than the surface area of ​​the second blade (101), and the sum of the surface areas of all the first blades (71) is much greater than the sum of the surface areas of all the second blades (101).

6. A chimney smoke exhaust fan according to claim 3, 4 or 5, characterized in that: The outer shell (1) is also fixedly connected with a heat insulation board assembly (9), the heat insulation board assembly (9) is located in the smoke exhaust chamber (3), the heat insulation board assembly (9) is located between the second impeller (10) and the partition board assembly (2), and the first heat dissipation hole (11) is located between the smoke outlet hole (8) and the heat insulation board assembly (9).

7. A chimney smoke exhaust fan according to claim 6, characterized in that: There is a distance between the heat insulation board assembly (9) and the partition board assembly (2).

8. A chimney smoke exhaust fan according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The shell (1) is also provided with a plurality of second heat dissipation holes (12), the second heat dissipation holes (12) being in communication with the installation cavity (4), the shell (1) being arranged in a transverse direction, and the second heat dissipation holes (12) being located at the bottom of the shell (1).

9. A chimney smoke exhaust fan according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The smoke exhaust fan also includes a conductive wire (13), the conductive wire (13) being attached to the outer wall of the outer shell (1) along the axial direction of the outer shell (1), and a spacer (14) being provided between two adjacent smoke outlets (8), and a clamping ring (15) being sleeved outside the spacer (14) and the conductive wire (13) so as to securely connect the conductive wire (13) to the outer shell (1).

10. A chimney smoke exhaust fan according to claim 1 or 2 or 3 or 4 or 5, characterized in that: A third impeller (17) is also fixedly connected to the output shaft (6) of the motor (5), and the third impeller (17) is located in the installation cavity (4).

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