Concealed duct smoke exhaust fan

Abstract

The hidden duct smoke exhaust fan includes an air duct, an impeller, a boost impeller, a driving motor, an impeller gear, and a boost impeller gear. The impeller is characterized in that the impeller is arranged at both ends of the inside of the air duct, and the boost impeller is arranged in the middle of the air duct. The inner edges of the impeller and the boost impeller are arranged with blades, and the outer edges of the impeller and the boost impeller are provided with racks. The impeller gear and the boost impeller gear are located in the upper part of the air duct. A connecting hole is provided in the upper part of the air duct. The impeller gear and the impeller are meshed at the connecting hole, and the boost impeller gear and the boost impeller are meshed at the connecting hole. This solution arranges the driving motor at the outer end of the air duct to directly avoid the influence of smoke on the driving motor, and the air duct of this solution can form a pressurized chamber, which can increase the wind passing pressure during ventilation, and the impeller of this solution is designed as an impeller structure with a hollow center, so that the seat will not cause excessive passing pressure during ventilation.

Description

Technical Field

[0001] The present invention relates to the technical field related to fans for fire smoke exhaust, and in particular to a concealed duct smoke exhaust fan. Background Art

[0002] Fire-fighting fans are widely used in office buildings, hotels, restaurants, auditoriums, theaters, office buildings, shopping malls, hospitals, underground parking lots and other places that require fire smoke exhaust. Therefore, the quality of the fan directly affects the safety of people and property. The smoke that will appear in the exhaust process of the fan will cause certain damage to the fan motor. In addition, the DC single-fan fan will cause a certain amount of headwind pressure when exhausting smoke and exhausting air. The blade 7 impeller 2 will also have a certain impact on ventilation and affect the exhaust efficiency. Summary of the Invention

[0003] The present invention provides a concealed duct smoke exhaust fan, which is used to solve the technical problems arising from the above-mentioned background technology.

[0004] The hidden duct smoke exhaust fan includes an air duct, an impeller, a boost impeller, a drive motor, an impeller gear, and a boost impeller gear. The impeller is characterized in that the impeller is arranged at both ends of the inside of the air duct, the boost impeller is arranged in the middle of the air duct, the inner edges of the impeller and the boost impeller are arranged with blades, the outer edges of the impeller and the boost impeller are provided with toothed belts, the impeller gear and the boost impeller gear are located at the upper part of the air duct, the upper part of the air duct is provided with a connecting hole, the impeller gear is meshed with the impeller at the connecting hole, and the boost impeller gear and the boost impeller are meshed at the connecting hole. The drive motor is arranged at the upper rear end of the air duct, and the drive motor is coaxially connected to the impeller gear and the boost impeller gear. The channel chamber inside the air duct is frustum-shaped, and the frustums are arranged in a mirror image and are connected. A limiting contour is provided on the edge inside the air duct, and the impeller and the boost impeller are rotated in the limiting contour of the air duct. A drive motor fixing groove is provided on the upper outer end of the air duct, and asbestos is provided in the drive motor fixing groove. Electromagnetic coils are provided on the inner walls of both ends of the air duct, and the circuit of the electromagnetic coil is connected in series with the control circuit of the drive motor.

[0005] Preferably, the hidden duct smoke exhaust fan is characterized in that an extension portion is provided at the rear of the air duct, and the drive motor is arranged on the upper part of the extension portion.

[0006] Preferably, the hidden duct smoke exhaust fan is characterized in that reinforcing ribs are provided on the outer surfaces of the blades of the impeller and the booster impeller.

[0007] Preferably, the hidden duct smoke exhaust fan is characterized in that auxiliary wheels are arranged in the limiting contour of the air duct, and each limiting contour has at least two rows of auxiliary wheels, and the rotating shaft of each row of auxiliary wheels is aligned with the side wall of the limiting contour.

[0008] Preferably, the hidden duct smoke exhaust fan is characterized in that a protective shell is provided on the upper part of the air duct, the protective shell covers the outer ends of the drive motor, the impeller gear, and the boost impeller gear, and the edge of the protective shell is connected to the edge of the air duct.

[0009] Preferably, the hidden duct smoke exhaust fan is characterized in that a support column is connected between the driving motor fixing groove and the driving motor, and the support columns are arranged and interspersed between the asbestos.

[0010] Preferably, the hidden duct smoke exhaust fan is characterized in that the width of the toothed belt on the outer surface of the impeller and the booster impeller is smaller than the width of the impeller and the booster impeller, and the auxiliary wheel rotates in contact with the difference between the outer surface of the impeller and the booster impeller and the toothed belt.

[0011] Preferably, the hidden duct smoke exhaust fan is characterized in that at least two groups of impellers and booster impellers are provided in the air duct and are arranged in mirror-image positions.

[0012] Preferably, the hidden duct smoke exhaust fan is characterized in that a bearing seat is provided on the upper end surface of the air duct, the rotating shaft of the drive motor rotates through the bearing seat, and the bearing seat is arranged between the drive motor and the impeller gear and the boost impeller gear.

[0013] Beneficial effects: This solution sets the drive motor at the outer end of the air duct to directly avoid the influence of smoke on the drive motor. Moreover, the air duct of this solution can form a pressurized chamber, which can increase the wind passing pressure during ventilation. The impeller of this solution is designed as an impeller structure with a hollow center, and the seat will not cause excessive passing pressure during ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 The impeller and the booster impeller of the present invention;

[0016] Figure 3 This is a schematic diagram of the limiting profile and auxiliary wheel structure of the present invention;

[0017] Figure 4 It is a three-dimensional diagram of the present invention;

[0018] In the figure: air duct 1, impeller 2, boost impeller 3, drive motor 4, impeller gear 5, boost impeller gear 6, blade 7, connecting hole 8, limiting contour 9, drive motor fixing groove 10, asbestos 11, electromagnetic coil 12, reinforcing rib 13, auxiliary wheel 14, protective shell 15, toothed belt 16, bearing seat 17. DETAILED DESCRIPTION

[0019] The following is a detailed description of the implementation process of the present invention in conjunction with the accompanying drawings. The embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should also be noted that, unless otherwise clearly stipulated and limited, the terms "setting", "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a bolt connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-4 The hidden duct smoke exhaust fan shown includes an air duct 1, an impeller 2, a boost impeller 3, a drive motor 4, an impeller gear 5, and a boost impeller gear 6. The impeller 2 is arranged at both ends of the inside of the air duct 1, and the boost impeller 3 is arranged in the middle of the air duct 1. The inner edges of the impeller 2 and the boost impeller 3 are arranged with blades 7, and the outer edges of the impeller 2 and the boost impeller 3 are provided with a toothed belt 16. The impeller gear 5 and the boost impeller gear 6 are located at the upper part of the air duct 1. The upper part of the air duct 1 is provided with a connecting hole 8. The impeller gear 5 is meshed with the impeller 2 at the connecting hole 8, and the boost impeller gear 6 and the boost impeller 3 are connected at the connecting hole 8. The connecting hole 8 is engaged, and the drive motor 4 is arranged at the upper rear end of the air duct 1. The drive motor 4 is coaxially connected to the impeller gear 5 and the boost impeller gear 6. The channel chamber inside the air duct 1 is frustum-shaped, and the frustums are arranged in a mirror image and connected. A limiting contour 9 is provided on the edge inside the air duct 1. The impeller 2 and the boost impeller 3 are rotatably set in the limiting contour 9 of the air duct 1. A drive motor fixing groove 10 is provided on the upper outer end of the air duct 1, and asbestos 11 is provided in the drive motor fixing groove 10. Electromagnetic coils 12 are provided on the inner walls of both ends of the air duct 1, and the circuit of the electromagnetic coil 12 is connected in series with the control circuit of the drive motor 4.

[0022] Furthermore, an extension portion is provided at the rear of the air duct 1 , and the drive motor 4 is arranged on the upper portion of the extension portion.

[0023] Furthermore, reinforcing ribs 13 are provided on the outer surfaces of the blades 7 of the impeller 2 and the boost impeller 3 .

[0024] Furthermore, auxiliary wheels 14 are arranged in the limiting profile 9 of the air duct 1 . Each limiting profile 9 has at least two rows of auxiliary wheels 14 , and the rotation axis of each row of auxiliary wheels 14 is aligned with the side wall of the limiting profile 9 .

[0025] Furthermore, a protective shell 15 is provided on the upper portion of the air duct 1 , which covers the outer ends of the drive motor 4 , the impeller gear 5 , and the boost impeller gear 6 , and the edge of the protective shell 15 is connected to the edge of the air duct 1 .

[0026] Furthermore, support columns are connected between the drive motor fixing slot 10 and the drive motor 4 , and the support columns are arranged and inserted between the asbestos 11 .

[0027] Furthermore, the width of the toothed belt 16 on the outer surface of the impeller 2 and the boost impeller 3 is smaller than the width of the impeller 2 and the boost impeller 3 , and the auxiliary wheel 14 rotates in contact with the difference between the outer surface of the impeller 2 and the boost impeller 3 and the toothed belt 16 .

[0028] Furthermore, at least two groups of impellers 2 and boost impellers 3 are provided in the air duct 1 and are arranged in mirror-image positions.

[0029] Furthermore, a bearing seat 17 is provided on the upper end surface of the air duct 1 , and the rotating shaft of the drive motor 4 rotates through the bearing seat 17 . The bearing seat 17 is arranged between the drive motor 4 and the impeller gear 5 and the boost impeller gear 6 .

[0030] The impellers 2 are arranged at both ends of the interior of the air duct 1. The air duct 1 can adopt a steel structure or a galvanized plate structure, or a building structure integrated with the building body. The boost impeller 3 is arranged in the middle of the air duct 1. The inner edges of the impeller 2 and the boost impeller 3 are arranged with blades 7. The outer surfaces of the blades 7 of the impeller 2 and the boost impeller 3 are provided with reinforcing ribs 13. When the impeller 2 and the boost impeller 3 rotate, the cyclone of the air duct 1 can be driven by the blades 7, and the circulation pressure is increased according to the chamber structure of the air duct 1 and the combined work of the impeller 2 and the boost impeller 3, and the wind speed and flux are enhanced. The outer edges of the impeller 2 and the boost impeller 3 are provided with a toothed belt 16, and the impeller gear 5 and the boost impeller gear 6 are located at the upper part of the air duct 1. A connecting hole 8 is provided at the upper part of the air duct 1, the impeller gear 5 is engaged with the impeller 2 at the connecting hole 8, the boost impeller gear 6 is engaged with the boost impeller 3 at the connecting hole 8, the drive motor 4 is arranged at the upper rear end of the air duct 1, the rear part of the air duct 1 is provided with an extension part, the drive motor 4 is arranged at the upper part of the extension part, the drive motor 4 is coaxially connected to the impeller gear 5 and the boost impeller gear 6, the channel inside the air duct 1 is frustum-shaped, the frustum-shaped is mirror-arranged and connected, a limiting profile 9 is provided on the edge inside the air duct 1, and auxiliary wheels 14 are arranged in the limiting profile 9 of the air duct 1, and each limiting profile 9 has at least two rows of auxiliary wheels 14, and the rotating shaft position of each row of auxiliary wheels 14 is aligned with the side wall of the limiting profile 9 for the impeller 2 and the boost impeller 3 are fixed and strengthened in rotation, the width of the toothed belt 16 on the outer surface of the impeller 2 and the boost impeller 3 is smaller than the width of the impeller 2 and the boost impeller 3, the auxiliary wheel 14 rotates and contacts at the difference between the outer surface of the impeller 2 and the boost impeller 3 and the toothed belt 16, and the impeller 2 and the boost impeller 3 are rotatably arranged in the limiting profile 9 of the air duct 1, and a drive motor fixing groove 10 is provided at the upper part of the outer end of the air duct 1, and asbestos 11 is provided in the drive motor fixing groove 10, and a support column is connected between the drive motor fixing groove 10 and the drive motor 4, and the support columns are arranged and interspersed between the asbestos 11 to strengthen the supporting force of the drive motor 4, and an electromagnetic coil 12 is provided on the inner wall at both ends of the air duct 1, and the circuit of the electromagnetic coil 12 is connected to the drive motor 4. The control circuit of the motor 4 is connected in series, and the electromagnetic coil 12 can absorb charged particles and dust passing through when energized. A protective shell 15 is provided on the upper part of the air duct 1, and the protective shell 15 covers the outer ends of the drive motor 4, the impeller gear 5, and the boost impeller gear 6. The edge of the protective shell 15 is connected to the edge of the air duct 1, and is used to protect the motor and the impeller gear 5 and the boost impeller gear 6 during rotation. There are at least two groups of impellers 2 and boost impellers 3 in the air duct 1, and the positions are arranged in a mirror image. A bearing seat 17 is provided on the upper end face of the air duct 1, and the rotating shaft of the drive motor 4 rotates through the bearing seat 17. The bearing seat 17 is arranged between the drive motor 4 and the impeller gear 5 and the boost impeller gear 6 to enhance stability during rotation.

[0031] The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A concealed duct smoke exhaust fan, comprising an air duct (1), an impeller (2), a boost impeller (3), a drive motor (4), an impeller gear (5), and a boost impeller gear (6), characterized in that The impellers (2) are arranged at both ends of the interior of the air duct (1), and the boost impeller (3) is arranged in the middle of the air duct (1). The inner edges of the impeller (2) and the boost impeller (3) are provided with blades (7), and the outer edges of the impeller (2) and the boost impeller (3) are provided with toothed belts (16). The impeller gear (5) and the boost impeller gear (6) are located at the upper part of the air duct (1). The upper part of the air duct (1) is provided with a connecting hole (8). The impeller gear (5) and the impeller (2) are meshed at the connecting hole (8). The boost impeller gear (6) and the boost impeller (3) are meshed at the connecting hole (8). The drive motor (4) is arranged at the upper rear end of the air duct (1) and is coaxially connected to the impeller gear (5) and the boost impeller gear (6). The channel chamber inside the air duct (1) is truncated cone-shaped, and the truncated cones are arranged in a mirror image and are connected. A plurality of limiting contours (9) are provided on the edge of the inside of the air duct (1). The impeller (2) and the boost impeller (3) are rotatably arranged in the limiting contours (9) of the air duct (1). A drive motor fixing groove (10) is provided on the upper part of the outer end of the air duct (1). The drive motor fixing groove (10) is provided on the upper part of the outer end of the air duct (1). 0) is provided with asbestos (11), electromagnetic coils (12) are provided on the inner walls of both ends of the air duct (1), the circuit of the electromagnetic coil (12) is connected in series with the control circuit of the drive motor (4), the rear portion of the air duct (1) is provided with an extension portion, the drive motor (4) is arranged on the upper portion of the extension portion, and reinforcing ribs (13) are provided on the outer surfaces of the blades (7) of the impeller (2) and the boost impeller (3), and auxiliary wheels (14) are arranged in the limiting profile (9) of the air duct (1), and the auxiliary wheels (14) of each limiting profile (9) are provided with two rows, and each row of auxiliary wheels ( The rotating shaft of the air duct (1) is located on the side wall of the limiting profile (9), the width of the toothed belt (16) on the outer surface of the impeller (2) and the boost impeller (3) is smaller than the width of the impeller (2) and the boost impeller (3), the auxiliary wheel (14) rotates and contacts at the difference between the outer surface of the impeller (2) and the boost impeller (3) and the toothed belt (16), the upper end surface of the air duct (1) is provided with a bearing seat (17), the rotating shaft of the drive motor (4) rotates and passes through the bearing seat (17), and the bearing seat (17) is set between the drive motor (4) and the impeller gear (5) and the boost impeller gear (6).

2. The hidden duct smoke exhaust fan according to claim 1 is characterized in that A protective housing (15) is provided on the upper portion of the air duct (1), the protective housing (15) covers the outer ends of the drive motor (4), the impeller gear (5), and the boost impeller gear (6), and the edge of the protective housing (15) is connected to the edge of the air duct (1).

3. The hidden duct smoke exhaust fan according to claim 1 is characterized in that A support column is connected between the drive motor fixing groove (10) and the drive motor (4), and the support columns are arranged and inserted between the asbestos (11).

4. The hidden duct smoke exhaust fan according to claim 1 is characterized in that At least two groups of the impellers (2) and the boost impellers (3) are provided in the air duct (1), and their positions are arranged in a mirror image.

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