Ventilation equipment with noise reduction function

Abstract

The ventilation equipment with the noise reduction function comprises a supporting cover, a ventilation pipe is fixedly connected into the supporting cover in an inserted mode, a fan body is fixedly installed on the outer wall of one side of the supporting cover and communicated with an air inlet of the ventilation pipe, a filtering assembly is installed in the ventilation pipe, and the filtering assembly is communicated with the air inlet of the ventilation pipe. The filtering assembly comprises a driving rod rotationally connected with the top of the circumferential inner wall of the ventilation pipe through a bearing, one end of the top of the driving rod penetrates through the supporting cover and extends outwards, a filtering ring is coaxially fixed to one end of the bottom of the driving rod, the circumferential outer wall of the filtering ring is attached to the circumferential inner wall of the ventilation pipe, and a filtering net is arranged on the circumferential inner wall of the filtering ring. By arranging the filter assembly, the filter screen can be overturned after being used for a period of time, so that self-cleaning can be carried out by virtue of airflow backflushing, the service life of the filter screen is ensured to be long enough, and the improvement of the flow rate of airflow is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, specifically a ventilation equipment with noise reduction function. Background Technology

[0002] Ventilation equipment is widely used in various fields, including industry, construction, and homes. In industry, ventilation equipment is mainly used to remove harmful gases and odors and maintain air circulation in workshops; in construction, it is used to improve indoor air quality and provide a comfortable indoor environment; and in homes, it is mainly used for ventilation, cooling, and dehumidification.

[0003] A search revealed a utility model patent with Chinese patent publication number CN219934197U, which discloses a ventilation device with noise reduction function, including an air supply channel: an air inlet chamber is fixedly connected to the right side of the air supply channel, and a noise reduction unit is provided on the inner side of the air inlet chamber. The noise reduction unit includes three inclined plates, which are fixedly connected to the inner side of the air inlet chamber. The inclined plates are hollow, and multiple round holes are opened on the opposite side of the left and right inclined plates.

[0004] The aforementioned device achieves the effect of intercepting dust by setting up a filter inside the air inlet chamber. However, as the usage time increases, the dust thickness will gradually accumulate, which will lead to insufficient air circulation and inevitably affect the ventilation effect. Utility Model Content

[0005] The purpose of this invention is to provide a ventilation device with noise reduction function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a ventilation device with noise reduction function, comprising a support cover, a ventilation pipe fixedly inserted inside the support cover, a fan body fixedly installed on one outer wall of the support cover, the fan body being connected to the air inlet of the ventilation pipe, a filter assembly installed inside the ventilation pipe, the filter assembly comprising a drive rod rotatably connected to the top of the inner circumference of the ventilation pipe via a bearing, one top end of the drive rod passing through the support cover and extending outward, a filter ring coaxially fixed at the bottom end of the drive rod, the outer circumference of the filter ring fitting against the inner circumference of the ventilation pipe, a filter screen being provided on the inner circumference of the filter ring, and a gear coaxially fixed at the top end of the drive rod.

[0007] As a further preferred embodiment of this technical solution, a motor is fixedly installed at one end of the top outer wall of the support cover, and a gear two that meshes with gear one is coaxially fixed at the output end of the motor, wherein the number of teeth of gear one is twice the number of teeth of gear two.

[0008] The filter screen can be flipped after a period of use, allowing it to clean itself by backflushing with airflow. This ensures a long service life for the filter screen and improves airflow efficiency. After a period of use, dust and impurities accumulate on the surface of the filter screen. At this time, simply start the motor on top of the support cover. Gear 2, connected to its output end, will be driven to rotate. Gear 2 meshes with gear 1 and rotates half a turn. Gear 1, through the drive rod, will drive the filter ring to rotate half a turn synchronously, thus changing the orientation of the filter screen. The airflow generated by the fan will backflush the filter screen, and the accumulated dust will be blown into the ventilation duct. At this point, it can be intercepted and collected at the air outlet.

[0009] As a further preferred embodiment of this technical solution, the ventilation pipe port is provided with an air outlet, and the air outlet is horn-shaped, and a noise reduction component is installed inside the air outlet.

[0010] As a further preferred embodiment of this technical solution, the noise reduction component includes two mounting rings placed inside the ventilation duct. Each of the two mounting rings is provided with one or more horizontally arranged sound-absorbing columns, and the sound-absorbing columns inside the two mounting rings are staggered. Each sound-absorbing column is composed of an outer metal tube and an inner sound-absorbing cotton. The gap between the support cover and the ventilation duct is filled with a filling layer.

[0011] As a further preferred embodiment of this technical solution, the two mounting rings are fixedly connected to one or more extension rods, one end of the extension rods is fixedly connected to the same connecting ring, and the connecting ring is detachably connected to the air outlet by bolts.

[0012] This design allows the noise generated by the fan to be weakened and absorbed multiple times, thus greatly reducing the noise produced by the equipment. The noise transmitted outward through the ventilation duct is further absorbed by the filling layer. The streamlined shape of the ventilation duct reduces airflow resistance and avoids unnecessary noise. Finally, the airflow and noise pass through two mounting rings. Because the sound-absorbing columns inside are staggered, they ensure that the airflow can pass smoothly while creating a new acoustic path for the noise. The sound-absorbing cotton inside can also absorb some noise, thus weakening the noise a second time before it is finally transmitted outward through the air outlet.

[0013] As a further preferred embodiment of this technical solution, the ventilation duct is wavy in the middle, and the bends of the ventilation duct are all streamlined.

[0014] As a further preferred embodiment of this technical solution, the motor is a pulse motor.

[0015] This utility model provides a ventilation device with noise reduction function, which has the following beneficial effects:

[0016] (1) By setting up a filter assembly, the filter screen can be flipped after a period of use, so that it can be cleaned by airflow backwash, ensuring that the service life of the filter screen is long enough and improving the airflow rate. After a period of use, the dust and impurities on the surface of the filter screen will accumulate. At this time, as long as the motor on the top of the support cover is started, the gear two connected to its output end will be driven to rotate. The gear two will drive the gear one to rotate half a turn through meshing. The gear one will drive the filter ring to rotate half a turn synchronously through the drive rod, so that the orientation of the filter screen will be changed. The airflow generated by the fan body will backwash the filter screen, and the accumulated dust will be blown into the ventilation pipe. At this time, it is only necessary to intercept and collect it at the air outlet.

[0017] (2) By setting noise reduction components, the noise generated by the operation of the fan can be weakened and absorbed multiple times, thereby greatly reducing the noise generated by the equipment. The noise transmitted outward through the ventilation pipe will be further absorbed by the filling layer. The ventilation pipe is streamlined, which can reduce airflow resistance and avoid unnecessary noise. Finally, the airflow and noise will pass through the two mounting rings. Since the sound-absorbing columns inside are staggered, it ensures that the airflow can pass smoothly and also creates a new acoustic path for the noise. In addition, the sound-absorbing cotton inside can also absorb some noise, thereby weakening the noise a second time. Finally, it will be transmitted outward through the air outlet. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0020] Figure 3 This is a partially enlarged structural diagram of the noise reduction component of this utility model;

[0021] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0022] In the diagram: 1. Support cover; 2. Fan body; 3. Ventilation duct; 4. Air outlet; 5. Filter assembly; 6. Noise reduction assembly; 501. Drive rod; 502. Filter ring; 503. Filter screen; 504. Gear 1; 505. Motor; 506. Gear 2; 601. Filling layer; 602. Mounting ring; 603. Extension rod; 604. Connecting ring; 605. Silencing column. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] This utility model provides a technical solution: such as Figure 1 As shown in Figure 4, in this embodiment, a ventilation device with noise reduction function includes a support cover 1. A ventilation pipe 3 is fixedly inserted inside the support cover 1. A fan body 2 is fixedly installed on one outer wall of the support cover 1. The fan body 2 is connected to the air inlet of the ventilation pipe 3. A filter assembly 5 is installed inside the ventilation pipe 3. The filter assembly 5 includes a drive rod 501 that is rotatably connected to the top of the inner circumference of the ventilation pipe 3 through a bearing. One end of the drive rod 501 passes through the support cover 1 and extends outward. A filter ring 502 is coaxially fixed to one end of the bottom of the drive rod 501. The outer circumference of the filter ring 502 is in contact with the inner circumference of the ventilation pipe 3. A filter screen 503 is provided on the inner circumference of the filter ring 502. A gear 504 is coaxially fixed to one end of the top of the drive rod 501.

[0025] A motor 505 is fixedly installed on one end of the top outer wall of the support cover 1. A gear 506 that meshes with gear 504 is coaxially fixed at the output end of the motor 505. The number of teeth of gear 504 is twice the number of teeth of gear 506.

[0026] As dust and impurities accumulate on the surface of filter 503, simply start the motor 505 on top of the support cover 1. The gear 2 506 connected to its output end will be driven to rotate. The gear 2 506 meshes with the gear 1 504 and rotates half a turn. The gear 1 504 drives the filter ring 502 to rotate half a turn synchronously through the drive rod 501, thereby changing the orientation of filter 503. The airflow generated by the fan body 2 will backflush the filter 503, and the accumulated dust will be blown into the ventilation pipe 3. At this time, it is only necessary to intercept and collect it at the air outlet 4.

[0027] like Figure 1 As shown in Figure 2, the ventilation pipe 3 has an air outlet 4 at its end, and the air outlet 4 is horn-shaped. The air outlet 4 is equipped with a noise reduction component 6, which can increase the air outlet area, which helps to reduce the airflow speed and thus reduce the generation of noise.

[0028] like Figure 2 and Figure 3 As shown, the noise reduction component 6 includes two mounting rings 602 placed inside the ventilation duct 3. Each of the two mounting rings 602 has one or more horizontally arranged sound-absorbing columns 605. The sound-absorbing columns 605 inside the two mounting rings 602 are staggered. The sound-absorbing columns 605 are composed of an outer metal tube and an inner sound-absorbing cotton. The gap between the support cover 1 and the ventilation duct 3 is filled with a filling layer 601.

[0029] like Figure 2As shown, the ventilation duct 3 is wavy in the middle, and the bends of the ventilation duct 3 are all streamlined, which can form a complex acoustic path to ensure that noise can be reflected and consumed when changing direction.

[0030] Two mounting rings 602 are fixedly connected to one or more extension rods 603. One end of one or more extension rods 603 is fixedly connected to the same connecting ring 604, and the connecting ring 604 is detachably connected to the air outlet 4 by bolts.

[0031] The noise transmitted outward through the ventilation duct 3 will be further absorbed by the filling layer 601. The ventilation duct 3 is also streamlined, which can reduce airflow resistance and avoid unnecessary noise. Finally, the airflow and noise will pass through the two mounting rings 602. Since the sound-absorbing columns 605 inside are staggered, while ensuring that the airflow can pass smoothly, a new acoustic path will be created for the noise. The sound-absorbing cotton inside can also absorb some noise, thereby weakening the noise a second time. Finally, it will be transmitted outward through the air outlet 4.

[0032] like Figure 4 As shown, motor 505 is a pulse motor, which has self-locking properties, thus ensuring that filter ring 502 will deflect due to airflow.

[0033] This utility model provides a ventilation device with noise reduction function, and its specific working principle is as follows:

[0034] When the device is working, the airflow generated by the fan body 2 enters the ventilation duct 3, and then is conducted outward after passing through the entire flow channel of the ventilation duct 3. Because the middle part of the ventilation duct 3 is wavy, it can form a complex acoustic path, ensuring that noise can be reflected and dissipated when changing direction. In addition, the noise conducted outward through the ventilation duct 3 is further absorbed by the filling layer 601. The ventilation duct 3 is also streamlined, which can reduce airflow resistance and avoid generating unnecessary noise. Finally, the airflow and noise pass through the two mounting rings 602. Because the sound-absorbing columns 605 inside are staggered, they ensure that the airflow can pass smoothly and also create a new acoustic path for the noise. Furthermore, the sound-absorbing cotton inside can also absorb the noise. Some noise is absorbed, thus weakening the noise a second time, and finally it is conducted outward through the air outlet 4. After a period of use, dust and impurities accumulate on the surface of the filter screen 503. At this time, as long as the motor 505 on the top of the support cover 1 is started, the gear 2 506 connected to its output end will be driven to rotate. The gear 2 506 drives the gear 1 504 to rotate half a turn through meshing. The gear 1 504 drives the filter ring 502 to rotate half a turn synchronously through the drive rod 501, thereby changing the orientation of the filter screen 503. The airflow generated by the fan body 2 will backflush the filter screen 503, and the accumulated dust will be blown into the ventilation pipe 3. At this time, it is only necessary to intercept and collect it at the air outlet 4.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation device with noise reduction function, comprising a support cover (1), characterized in that: A ventilation pipe (3) is fixedly inserted inside the support cover (1). A fan body (2) is fixedly installed on one side of the outer wall of the support cover (1). The fan body (2) is connected to the air inlet of the ventilation pipe (3). A filter assembly (5) is installed inside the ventilation pipe (3). The filter assembly (5) includes a drive rod (501) that is rotatably connected to the top of the inner circumference of the ventilation pipe (3) through a bearing. One end of the top of the drive rod (501) passes through the support cover (1) and extends outward. One end of the bottom of the drive rod (501) is coaxially fixed with a filter ring (502). The outer circumference of the filter ring (502) is in contact with the inner circumference of the ventilation pipe (3). A filter screen (503) is provided on the inner circumference of the filter ring (502). One end of the top of the drive rod (501) is coaxially fixed with a gear (504).

2. A ventilation device with noise reduction function according to claim 1, characterized in that: A motor (505) is fixedly installed on one end of the top outer wall of the support cover (1). A gear (506) that meshes with gear one (504) is fixedly fixed on the output end of the motor (505). The number of teeth of gear one (504) is twice the number of teeth of gear two (506).

3. A ventilation device with noise reduction function according to claim 1, characterized in that: The ventilation pipe (3) is provided with an air outlet (4) at its port, and the air outlet (4) is horn-shaped. A noise reduction component (6) is installed inside the air outlet (4).

4. A ventilation device with noise reduction function according to claim 3, characterized in that: The noise reduction component (6) includes two mounting rings (602) placed inside the ventilation pipe (3). Each of the two mounting rings (602) is provided with one or more horizontally arranged sound-absorbing columns (605). The sound-absorbing columns (605) inside the two mounting rings (602) are staggered. The sound-absorbing columns (605) are composed of an outer metal pipe and an inner sound-absorbing cotton. The gap between the support cover (1) and the ventilation pipe (3) is filled with a filling layer (601).

5. A ventilation device with noise reduction function according to claim 4, characterized in that: Two mounting rings (602) are fixedly connected to one or more extension rods (603), one end of the extension rods (603) is fixedly connected to the same connecting ring (604), and the connecting ring (604) is detachably connected to the air outlet (4) by bolts.

6. A ventilation device with noise reduction function according to claim 1, characterized in that: The ventilation pipe (3) is wavy in the middle, and the bends of the ventilation pipe (3) are all streamlined.

7. A ventilation device with noise reduction function according to claim 2, characterized in that: The motor (505) is a pulse motor.

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