Novel pipeline air exchange fan with large ventilation quantity

Abstract

The utility model discloses a novel pipeline fan with large ventilation quantity, which comprises a box body with an air inlet and an air outlet respectively arranged at two ends, a volute is arranged in the box body, the volute is provided with an inlet and an outlet, the outlet of the volute is aligned and connected with the air outlet, an impeller driven by a motor is arranged in the volute, and the motor is positioned outside the box body and is connected with the impeller through a transmission shaft. The impeller is a double-air-inlet impeller, inlets of the volute are located on the two sides of the volute and aligned with the impeller, and a pair of air guide plates is arranged in the box body and located behind the corresponding inlets of the volute. The utility model provides the novel large-ventilation-quantity pipeline air exchange fan which can reduce the loss of airflow and increase the discharge air quantity.

Description

Technical Field

[0001] This utility model relates to a novel duct fan with large ventilation volume, and belongs to the field of fan replacement technology. Background Technology

[0002] Exhaust fans are widely used in our daily lives. They are commonly used for ventilation or air exchange in basements, factories, mines, laboratories, darkrooms, and other places. Existing exhaust fans consist of a housing with an air inlet and an air outlet. Inside the housing is a volute, and inside the volute is an impeller driven by a motor. The motor is mounted on one side of the volute, which drives the fan blades to generate centrifugal force, drawing air in from the air inlet and expelling it from the air outlet, thus achieving ventilation. Because the motor is mounted on one side of the volute inside the housing, it can block the airflow entering the housing from entering the volute. Since there is no air guiding device inside the housing, and the inlet of the volute is located in the middle of the housing, some air will be blown forward and then flow back into the volute. This process generates eddies, causing airflow loss. All of these factors limit the airflow of the exhaust fan. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a new type of duct fan with large ventilation volume, which can reduce airflow loss and enhance exhaust air volume, thus overcoming the shortcomings of the prior art.

[0004] The technical solution of this utility model is: a novel duct ventilation fan with large ventilation volume, comprising a housing with an air inlet and an air outlet at both ends, a volute housing inside the housing, the volute housing having an inlet and an outlet, the outlet of the volute housing being aligned and connected to the air outlet, an impeller driven by a motor inside the volute housing, the motor being located outside the housing and connected to the impeller via a transmission shaft, the impeller being a double-inlet impeller, the inlets of the volute housing being located on both sides and aligned with the impeller, and a pair of air guide plates inside the housing, the air guide plates being located behind the corresponding inlets of the volute housing.

[0005] Furthermore, a V-shaped air guide is provided at the air inlet of the housing, which guides the air entering the housing to both sides of the volute.

[0006] Furthermore, the V-shaped air guide is made of rubber and plastic sound-absorbing cotton.

[0007] Furthermore, the motor is mounted on the side wall of the housing and directly connected to the impeller keyway.

[0008] Furthermore, an inspection port is provided on the side wall of the enclosure, and an inspection door is sealed and covered at the inspection port, with the motor mounted on the inspection door.

[0009] Further, it includes a flexible connector, which is ring-shaped and has its two ends connected to the exhaust port and the outlet of the volute, respectively.

[0010] By implementing this utility model, the motor drives the impeller to rotate. The impeller is a double-inlet impeller, which allows air to enter the housing through the air inlet and then enter the volute from the inlets on both sides of the volute. The motor is located outside the housing and does not obstruct the incoming air, reducing airflow loss. At the same time, before entering the volute, the air guide plates on both sides guide the airflow, preventing the air from being blown to the rear of the volute before entering and then flowing back to form a vortex, further reducing airflow loss and enhancing the airflow during discharge. Attached Figure Description

[0011] Figure 1 This is a three-dimensional view of the present invention;

[0012] Figure 2 This is a first internal schematic diagram of the present invention;

[0013] Figure 3 This is a second internal schematic diagram of the present invention.

[0014] The diagram shows: 1. Air inlet; 2. Air outlet; 3. Housing; 4. Volute; 5. Inlet; 6. Outlet; 7. Motor; 8. Impeller; 9. Air guide plate; 10. V-shaped air guide; 11. Inspection door; 12. Flexible connector; 13. Barrier. Detailed Implementation

[0015] Embodiments of this utility model: such as Figures 1 to 3 As shown, a novel high-volume duct ventilation fan includes a housing 3 with an air inlet 1 and an exhaust outlet 2 at both ends. A volute 4 is housed within the housing 3, having an inlet 5 and an outlet 6. The outlet 6 of the volute 4 is aligned with and connected to the exhaust outlet 2. An impeller 8, driven by a motor 7, is located outside the housing 3 and connected to the impeller 8 via a drive shaft. The impeller 8 is a double-inlet impeller. The inlets 5 of the volute 4 are located on both sides and aligned with the impeller 8. A pair of guide vanes 9 are located within the housing 3, behind the corresponding inlets 5 of the volute 4. When the motor 7 drives the impeller 8 to rotate, the impeller 8 is a double-inlet impeller, which allows air to enter the housing 3 through the air inlet 1 and then enter the volute 4 through the inlets 5 on both sides of the volute 4. The motor 7 is located outside the housing 3 and will not obstruct the incoming air, thus reducing air volume loss. The air guide plates 9 on both sides are located between the side wall of the volute 4 and the side wall of the housing 3. Before entering the volute 4, the air guide plates 9 on both sides guide the airflow, preventing the air from being blown to the rear of the volute 4 before entering the volute 4 and then flowing back to form a vortex, further reducing air volume loss and helping to enhance the air volume during discharge.

[0016] As a preferred option, a V-shaped air guide 10 is provided at the air inlet 1 of the housing 3. When air enters the housing 3, the V-shaped air guide 10 diverts the air to both sides and enters the volute 4 through the inlets 5 on both sides of the volute 4, reducing the collision of air after entering the housing 3 and facilitating the enhancement of air volume during exhaust. The V-shaped air guide 10 is made of rubber and plastic sound-absorbing cotton, which absorbs sound when diverting the incoming air and reduces wind noise.

[0017] As a preferred option, the motor 7 is mounted on the side wall of the housing 3, and a sealing seal is provided on the side wall. The motor shaft passes through the seal on the side wall and is directly connected to the impeller 8 via the keyway. Compared with the transmission connection method where the motor 7 is mounted on the housing 3 and the transmission wheel is connected to the transmission belt, the structure is simpler and has greater torque, providing stronger rotational force, which is conducive to improving work efficiency and further enhancing air volume.

[0018] As a preferred option, an inspection port is provided on the side wall of the housing 3. An inspection door 11 is sealed and covered at the inspection port. After the inspection door 11 is covered by the inspection port, it is blocked by a stop 13 that can rotate in multiple directions to achieve installation. The motor 7 is installed on the inspection door 11. The motor 7 is installed on the inspection door 11 first and then enters the assembly, which is convenient for installation and also facilitates maintenance in the future.

[0019] As a preferred option, a flexible connector 12 is included. The flexible connector 12 is ring-shaped and is a retractable square hose made of flexible materials such as PVC. Its two ends are connected to the exhaust port 2 and the outlet 6 of the volute 4, respectively. It has better sealing performance, reduces air volume loss, and can block vibration transmission and prevent the connection from loosening.

Claims

1. A novel ducted ventilation fan with high ventilation capacity, comprising a housing with an air inlet and an air outlet at both ends, a volute housing inside the housing, the volute housing having an inlet and an outlet, the outlet of the volute housing being aligned and connected to the air outlet, and an impeller driven by a motor being installed inside the volute housing, characterized in that: The motor is located outside the housing and is connected to the impeller via a drive shaft. The impeller is a double-inlet impeller, and the inlets of the volute are located on both sides of it and aligned with the impeller. A pair of air guide plates are provided inside the housing, and the air guide plates are located behind the corresponding inlets of the volute.

2. The novel high-volume duct ventilation fan according to claim 1, characterized in that: The air inlet of the housing is equipped with a V-shaped air guide, which guides the air entering the housing to both sides of the volute.

3. The novel high-volume duct ventilation fan according to claim 2, characterized in that: The V-shaped air guide is made of rubber and plastic sound-absorbing cotton.

4. The novel high-volume duct ventilation fan according to any one of claims 1 to 3, characterized in that: The motor is mounted on the side wall of the housing and directly connected to the impeller keyway.

5. The novel high-volume duct ventilation fan according to claim 4, characterized in that: The box has an inspection port on its side wall, and an inspection door is sealed and covered at the inspection port. The motor is mounted on the inspection door.

6. The novel high-volume duct ventilation fan according to any one of claims 1 to 3, characterized in that: It includes a flexible connector, which is ring-shaped and has its two ends connected to the exhaust port and the outlet of the volute, respectively.

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