Noise reduction type ventilation equipment

Abstract

The utility model discloses noise reduction type ventilation equipment which comprises an air inlet cover, a pipeline and an air outlet cover, the air inlet cover, the pipeline and the air outlet cover are sequentially and detachably connected, an air inlet is formed in the air inlet cover, an air channel is formed in the pipeline, an air outlet is formed in the air outlet cover, and the air inlet is communicated with the air outlet. The air inlet, the air channel and the air outlet are communicated with one another, an air exchange assembly and a baffle are arranged in the air outlet cover, the air exchange assembly comprises a driving device and a fan, and an output shaft of the driving device is connected with a rotating shaft of the fan so as to be suitable for driving the fan to rotate in the air outlet cover. The other end of the driving shaft of the fan is rotationally connected with the blocking plate, the blocking plate is located between the air exchange assembly and the air channel, the blocking plate is arranged between the pipeline and the fan, the ends, guiding air to fan blades, of the air are stably cut through the design of the air channel, and the better noise reduction effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ventilation equipment technical field, specifically, relates to noise reduction type ventilation equipment. BACKGROUND

[0002] At present, the existing noise reduction type ventilation equipment faces certain technical limitations in actual application, the design of these devices usually does not set up the blocking device between fan and pipeline, and the noise of fan rotation is directly transmitted through the pipeline, which not only cannot effectively isolate or reduce noise, but also makes noise more easily and directly spread through the pipeline, thereby reducing the overall noise reduction effect.

[0003] Through the retrieval, it is found that the authorized announcement No. CN213270383U of Chinese utility model patent discloses a noise reduction ventilator, the patent sets up the grid cylinder and the sound absorbing cotton combination in the inlet pipe by setting up the sound absorbing board in the outlet pipe, and installing the streamline fairing on the fan, and the sound absorbing board and the fairing are made of foamed aluminum alloy, effectively absorbing airflow noise and vibration sound, improving the noise reduction effect, while ensuring that the fan parameters and airflow speed are not affected, however, the fan part of the patent is directly fixed in the pipeline through the support, the noise generated by the rotation of the fan is directly transmitted through the pipeline, and a large amount of wind directly acts on the fan as a whole, which can not cut the air stably, further generates noise, and the overall noise reduction effect is not good. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the defects in the prior art are overcome, the blocking plate is arranged between the pipeline and the fan, and the air is guided to the end of the fan blade through the design of the air duct, so that better noise reduction effect is realized.

[0005] In order to solve the above technical problems, the technical scheme of the utility model is noise reduction type ventilation equipment, which comprises:

[0006] An inlet cover, a pipeline and an outlet cover are sequentially detachably connected.

[0007] An inlet opening is formed in the inlet cover, an air duct is formed in the pipeline, and an outlet opening is formed in the outlet cover, and the inlet opening, the air duct and the outlet opening are in communication with each other.

[0008] A ventilation assembly and a blocking plate are arranged in the outlet cover, the ventilation assembly comprises a driving device and a fan rotatably installed in the outlet cover, and the output shaft of the driving device is connected with the rotating shaft of the fan to drive the fan to rotate in the outlet cover.

[0009] The barrier plate is located between the ventilation assembly and the air duct, a through slot is formed in the barrier plate, the through slot is communicated with the air duct, the position of the through slot corresponds to the blade end of the fan, and the blade end of the fan is an end away from the rotating shaft of the fan.

[0010] Further, a controller is mounted in the air inlet cover, the driving device is connected with the controller, and the controller is adapted to control the switching state of the driving device according to an input signal.

[0011] Further, a punched plate is arranged in the air duct, a containing cavity is formed between the punched plate and the air duct, and the containing cavity is adapted to be filled with sound-absorbing cotton.

[0012] Further, a fixed plate is arranged in the air duct, one end of the punched plate is fixed on the fixed plate, the other end of the punched plate is fixed on the inner wall of the air duct, an arc-shaped slot is formed in the fixed plate and penetrates through the fixed plate and communicates with the containing cavity, and a sealing plate is detachably connected to the fixed plate and is adapted to be actuated to change the switching state of the arc-shaped slot.

[0013] Further, the air duct is a straight channel, a first curved channel, a second curved channel and a ring-shaped cavity that are communicated with each other.

[0014] The straight channel is located close to the air inlet, the ring-shaped cavity is located close to the air outlet, and the ring-shaped cavity is adapted to guide air into the through slot.

[0015] Further, a damping layer is arranged on the inner wall of the second curved channel.

[0016] Further, a filter screen is arranged in the air inlet cover and located between the air inlet and the air duct.

[0017] Further, a damping assembly is arranged on the outer circumferential surface of the pipeline, and the damping assembly comprises a connecting plate, a threaded rod, two polyurethane damping pads and a limiting component corresponding to the polyurethane damping pads.

[0018] The threaded rod is connected with the outer circumferential surface of the pipeline, the connecting plate is sleeved outside the threaded rod, the two polyurethane damping pads are both sleeved outside the threaded rod and in contact with each other, and the limiting component is adapted to fix the position of the polyurethane damping pads on the threaded rod.

[0019] By adopting the above technical scheme, the present application has the following beneficial effects:

[0020] 1、By the setting of blocking plate and through slot structure, the fan rotates and part of the noise is blocked by the setting of blocking plate, and the wind directly acts on the end of the fan blade when passing through the through slot, avoiding the direct impact of the wind on the whole fan, causing the fan blade to be unable to effectively cut the air, further reducing the generation of noise, thereby achieving the effect of noise reduction.

[0021] 2、By the setting of curved channel, straight channel and annular chamber structure, the straight channel, curved channel and annular chamber optimize the airflow path, reduce the airflow resistance and improve the ventilation efficiency, and meanwhile, the design of the annular chamber helps to uniformly guide the wind into the through slot, further improving the noise reduction effect.

[0022] 3、By the setting of damping layer structure, multiple noise reduction measures are realized, the damping layer is arranged in the second curved channel, avoiding the generation of large noise during the airflow from wide to narrow, thereby achieving the effect of noise reduction. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure left side schematic view of the utility model;

[0024] Figure 2 It is a whole structure right side schematic view of the utility model;

[0025] Figure 3 It is a wind channel structure plane schematic view of the utility model;

[0026] Figure 4 It is an internal structure schematic view of the utility model;

[0027] Figure 5 It is a filter screen place schematic view in the air inlet cover of the utility model;

[0028] Figure 6 It is a ventilation assembly structure schematic view of the utility model;

[0029] Figure 7 It is an enclosed plate structure schematic view of the utility model.

[0030] In the drawing: 1, air inlet cover; 11, air inlet; 12, filter screen;

[0031] 2, pipeline; 21, air duct; 211, straight channel; 212, curved channel one; 213, curved channel two;

[0032] 3, air outlet cover; 31, air outlet;

[0033] 4, blocking plate; 41, through slot; 42, annular chamber;

[0034] 5, ventilation assembly; 51, driving device; 52, fan;

[0035] 6, damping layer;

[0036] 8, fixed plate; 81, sealing plate;

[0037] 9, damping assembly; 91, connecting plate; 92, threaded rod; 93, limiting part; 94, polyurethane damping pad;

[0038] 10, punched plate; 101, containing cavity. DETAILED DESCRIPTION

[0039] In order to make the content of the utility model more easily be clearly understood, below according to specific embodiment and combining with the drawings, the utility model is further detailed.

[0040] Example one

[0041] As Figures 1-4 Indicated, the noise reduction type ventilation equipment, ventilation equipment includes:

[0042] Air inlet 11 is opened in air inlet 1, air duct 21 is opened in pipe 2, and air outlet 31 is opened in air outlet 3, and air inlet 11, air duct 21 and air outlet 31 are communicated with each other;

[0043] Air inlet 11 is opened in air inlet 1, air duct 21 is opened in pipe 2, and air outlet 3 is opened in air outlet 3, and air inlet 11, air duct 21 and air outlet 31 are communicated with each other;

[0044] Air outlet 3 is provided with air exchange assembly 5 and baffle 4 respectively, air exchange assembly 5 includes driving device 51 and fan 52 rotatably installed in air outlet 3, and the output shaft of driving device 51 is connected with the rotating shaft of fan 52 to drive fan 52 to rotate in air outlet 3;

[0045] Baffle 4 is located between air exchange assembly 5 and air duct 21, baffle 4 is opened with through slot 41, through slot 41 is communicated with air duct 21, the position of through slot 41 corresponds with the blade end of fan 52, and the blade end of fan 52 is away from the rotating shaft of fan 52.

[0046] As Figure 1 Indicated, controller is installed in air inlet 1, driving device 51 is connected with controller, and controller is suitable for controlling the on-off state of driving device 51 according to input signal.

[0047] As Figure 7 Indicated, air duct 21 is provided with punched plate 10, containing cavity 101 is formed between punched plate 10 and air duct 21, and containing cavity 101 is suitable for filling sound-absorbing cotton.

[0048] As Figure 7As shown, the fixed plate 8 is arranged in the air duct 21, one end of the punched plate 10 is fixed on the fixed plate 8, and the other end of the punched plate 10 is fixed on the inner wall of the air duct 21, the arc-shaped groove is arranged on the fixed plate 8 and communicates with the accommodating cavity 101, and the sealing plate 81 is detachably connected to the fixed plate 8 and is suitable for being driven to change the opening and closing state of the arc-shaped groove.

[0049] As shown in the drawings, Figures 3-4 The air duct 21 is a straight channel 211, a curved channel one 212, a curved channel two 213 and a ring-shaped cavity 42 which communicate with each other;

[0050] The straight channel 211 is located near the air inlet 11, and the ring-shaped cavity 42 is located near the air outlet 31, and the ring-shaped cavity 42 is suitable for guiding the air into the through groove 41.

[0051] As shown in the drawings, Figure 4 The inner wall of the curved channel two 213 is provided with a damping layer 6.

[0052] As shown in the drawings, Figure 5 The filter screen 12 is arranged in the air inlet 11 and the air duct 21.

[0053] The working principle of the embodiment is as follows:

[0054] The device is installed on the wall of the house which needs ventilation, and the ventilation device is installed in the hole on the wall, one end of the air inlet cover 1 is located in the room, and one end of the air outlet cover 3 is located outdoors, the driving device 51 drives the fan 52 to rotate through the controller, thereby realizing the effect of inhaling, in the case that the ventilation device does not work, in order to avoid the air in the room and the outdoor air from flowing into each other, an electric control valve can be arranged in the ventilation device, or a sealing cover is matched with the air inlet 11 outside the air inlet cover 1;

[0055] In use, the driving device 51 is started after inputting a signal to the controller, the driving device 51 can be a brushless DC motor, the driving device 51 drives the fan 52 to rotate to suck the air in the room, the driving device 51 and the fan 52 will produce a certain noise during work, which will be enlarged through the pipeline 2, therefore, the blocking plate 4 is arranged between the air duct 21 and the fan 52, the blocking plate 4 is made of noise reduction material, which can be polyurethane fiber plate, because the through groove 41 is arranged on the blocking plate 4, therefore, the blocking plate 4 partially blocks the noise of the fan 52 and the driving device 51 to reduce the influence of the noise;

[0056] The indoor air is driven by the fan 52 to enter the air inlet 11 into the air inlet cover 1, and then filtered by the filter screen 12. The filtered air enters the inside of the air duct 21, and then contacts the end of the blade of the fan 52 through the through slot 41 on the blocking plate 4. The rotating blade can stably cut the airflow and is not easy to produce noise.

[0057] To further improve the noise reduction effect, the air duct 21 is divided into a straight channel 211, a curved channel one 212, a curved channel two 213, and a ring-shaped chamber 42. When the air passes through the straight channel 211, the straight channel 211 is closest to the indoor contact distance, so the punched plate 10 is arranged in the straight channel 211. The sound-absorbing cotton is placed in the accommodation cavity 101 between the punched plate 10 and the straight channel 211. The sound-absorbing cotton is used to reduce the noise of the airflow passing through the straight channel 211. The punched plate 10 prevents the sound-absorbing cotton from leaking out.

[0058] Subsequently, the airflow passes through the curved channel one 212 and the curved channel two 213. This part is arc-shaped and gradually decreases from wide to narrow, gradually changes the cross-sectional area of the airflow, makes the airflow more stable when passing through, reduces the instability of the airflow, thereby reducing the generation of noise, and reduces the generation of vortex and turbulence. After the airflow passes through the curved channel two 213, it enters the ring-shaped chamber 42. In the ring-shaped chamber 42, it is evenly divided into the corresponding through slot 41 to contact the blade of the fan 52, thereby further improving the noise reduction effect.

[0059] It should be noted that according to the continuity theorem, when the airflow stably flows through the pipe 2 with changing diameter, the flow rate is conserved, that is, the amount of air flowing in per second is also the amount of air flowing out. Therefore, in the process of gradually reducing the cross-sectional area of the pipe 2, in order to keep the flow rate unchanged, the speed of the airflow will gradually increase. However, this increase in speed is gradual, not sudden, which avoids the violent disturbance and instability of the airflow when the cross-sectional area suddenly changes. In the traditional straight channel, due to the too fast flow rate of the airflow or other interference factors, such as obstacles in the pipe 2, uneven pipe 2 wall, etc., turbulence and vortex are more likely to occur, thereby causing the breeding of noise. In this embodiment, the airflow transported by the simple straight channel 211 into the through slot 41 will cause the channel to suddenly decrease;

[0060] The damping layer 6 is added in the curved channel two 213. The cross-section of the curved channel is the smallest, and the flow rate of the airflow passing through it is the fastest. The damping layer 6 can reduce the vibration and noise caused by the airflow. The damping layer 6 is made of high-damping material, which can be rubber, foam, etc.

[0061] In addition, a fixed plate 8 is provided inside the pipe 2, which supports the punching plate 10. A detachable sealing plate 81 is provided on the fixed plate 8. The sealing plate 81 is used to open and close the accommodating chamber 101. By opening the sealing plate 81, the silencer cotton in the accommodating chamber 101 can be replaced and processed. After processing, the sealing plate 81 is fixed to the fixed plate 8 to close the accommodating chamber 101.

[0062] Example 2

[0063] like Figure 3 As shown, this embodiment further includes the following structure on the basis of the first embodiment: a vibration damping assembly 9 is provided on the outer circumferential surface of the pipe 2, and the vibration damping assembly 9 includes a connecting plate 91, a threaded rod 92, two polyurethane vibration damping pads 94 and a limiting component 93 corresponding to the polyurethane vibration damping pads 94;

[0064] The threaded rod 92 is connected to the outer circumference of the pipe 2, the connecting plate 91 is sleeved on the outside of the threaded rod 92, the two polyurethane vibration damping pads 94 are sleeved on the outside of the threaded rod 92 and contact each other, and the limiting component 93 is suitable for fixing the position of the polyurethane vibration damping pads 94 on the threaded rod 92;

[0065] The limiting component 93 is a washer and a double nut corresponding to the polyurethane vibration damping pad 94 .

[0066] The working principle of this embodiment is as follows:

[0067] The ventilation device as a whole will also produce slight vibrations during operation. The threaded rod 92 is connected to the outer circumference of the pipe 2, and the connecting plate 91 is placed on the outside of the threaded rod 92. The connecting plate 91 is connected to the wall surface on which the ventilation device is installed. Two offset polyurethane vibration-damping pads 94 are provided on the threaded rod 92. The two polyurethane vibration-damping pads 94 are fixed to the threaded rod 92 by corresponding washers and nuts. The double-nut fixing method is used to prevent a single nut from loosening under long-term vibration.

[0068] When the ventilation equipment generates vibration, the vibration is transmitted to the two polyurethane vibration-damping pads 94 through the threaded rod 92. The polyurethane vibration-damping pads 94 have good elasticity and vibration absorption performance, which can effectively deal with the vibration generated by the ventilation equipment, thereby achieving a noise reduction effect.

[0069] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A noise reducing ventilation device, characterized by: The ventilation equipment comprises: an air inlet cover (1), a duct (2) and an air outlet cover (3), which are detachably connected in sequence; an air inlet (11) is formed on the air inlet cover (1), an air duct (21) is formed in the duct (2), and an air outlet (31) is formed on the air outlet cover (3), the air inlet (11), the air duct (21) and the air outlet (31) are in communication with each other; a ventilation assembly (5) and a blocking plate (4) are arranged in the air outlet cover (3) respectively, the ventilation assembly (5) comprises a driving device (51) and a fan (52) rotatably arranged in the air outlet cover (3), an output shaft of the driving device (51) is connected with a rotating shaft of the fan (52) to drive the fan (52) to rotate in the air outlet cover (3); the blocking plate (4) is located between the ventilation assembly (5) and the air duct (21), a through slot (41) is formed on the blocking plate (4), the through slot (41) is in communication with the air duct (21), the position of the through slot (41) corresponds to the blade end of the fan (52), and the blade end of the fan (52) is an end away from the rotating shaft of the fan (52).

2. The noise reducing ventilation device of claim 1, wherein a controller is arranged in the air inlet cover (1), the driving device (51) is connected with the controller, and the controller is adapted to control the on-off state of the driving device (51) according to an input signal.

3. The noise reducing ventilation device of claim 1, wherein a punched plate (10) is arranged in the air duct (21), a containing cavity (101) is formed between the punched plate (10) and the air duct (21), and the containing cavity (101) is adapted to be filled with sound-absorbing cotton.

4. The noise reducing ventilation device of claim 3, wherein a fixed plate (8) is arranged in the air duct (21), one end of the punched plate (10) is fixed on the fixed plate (8), the other end of the punched plate (10) is fixed on the inner wall of the air duct (21), an arc-shaped groove is formed in the fixed plate (8) and penetrates through the fixed plate (8) and communicates with the containing cavity (101), and a sealing plate (81) is detachably connected to the fixed plate (8), the sealing plate (81) is adapted to be actuated to change the on-off state of the arc-shaped groove.

5. The noise reducing ventilation device of claim 1, wherein the air duct (21) is a straight channel (211), a curved channel one (212), a curved channel two (213) and a ring-shaped cavity (42) which are in communication with each other; the straight channel (211) is located on the side close to the air inlet (11), the ring-shaped cavity (42) is located on the side close to the air outlet (31), and the ring-shaped cavity (42) is adapted to guide air into the through slot (41).

6. The noise reducing ventilation device of claim 5, wherein, a damping layer (6) is arranged on the inner wall of the curved channel two (213).

7. The noise reducing ventilation device of claim 1, wherein a filter screen (12) is arranged in the air inlet cover (1), and the filter screen (12) is located between the air inlet (11) and the air duct (21).

8. The noise reducing ventilation device of claim 1, wherein, The outer circumferential surface of the pipeline (2) is provided with a damping assembly (9), the damping assembly (9) comprises a connecting plate (91), a threaded rod (92), two polyurethane damping pads (94) and a limiting component (93) corresponding to the polyurethane damping pad (94); The threaded rod (92) is connected with the outer circumferential surface of the pipeline (2), the connecting plate (91) is sleeved on the outside of the threaded rod (92), the two polyurethane damping pads (94) are both sleeved on the outside of the threaded rod (92) and contact with each other, and the limiting component (93) is suitable for fixing the position of the polyurethane damping pad (94) on the threaded rod (92).

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