Ventilator

Abstract

The utility model discloses a ventilator, which belongs to the technical field of ventilator noise reduction and comprises a fan, a first hush pipe and a second hush pipe, and the first hush pipe and the second hush pipe are respectively arranged at an air inlet and an air outlet of the fan. The first silencing pipe and the second silencing pipe are of a double-layer structure. Through holes communicated with the interlayer are formed in the inner walls of the first hush pipe and the second hush pipe; sound absorption assemblies are arranged in the interlayers; the inner wall of the first silencing pipe and the inner wall of the second silencing pipe are uneven. The inner wall of the hush pipe is arranged to be of the concave-convex structure, noise can be greatly reflected, so that the noise is attenuated, the hush pipe is of the double-layer structure, when the fan works, wind easily enters the interlayer, the sound absorption assembly is arranged in the interlayer, so that the noise is absorbed, and due to the fact that the flowing direction of the wind changes many times, the noise can be effectively reduced. And in addition, the sound absorption assemblies work synchronously, so that the noise reduction effect of the fan is more obvious.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilator noise reduction, in particular to a ventilator. Background Art

[0002] Axial flow fans are widely used in ventilation operations such as mines, tunnels, and subways.

[0003] For example, the Chinese utility model patent with the publication (announcement) number CN219932483U discloses a low-noise axial flow fan, which is achieved by installing silencers on both sides of the fan body and arranging silencer materials in the silencers. When wind passes through the silencers, the silencer materials are used to absorb and reduce noise.

[0004] In actual use, when wind passes through the silencer, the wavy inner wall of the silencer can absorb noise, but due to structural limitations, the noise reduction effect is not obvious. Utility Model Content

[0005] In order to solve the problems of the prior art, the utility model provides a ventilator, comprising a fan, and a first silencer pipe and a second silencer pipe respectively arranged at an air inlet and an air outlet of the fan;

[0006] The first silencer pipe and the second silencer pipe are double-layer structures, and both have interlayers;

[0007] The inner walls of the first muffler pipe and the second muffler pipe are both provided with through holes communicating with the interlayer;

[0008] Sound absorbing components are arranged in the interlayers;

[0009] The inner walls of the first silencer pipe and the second silencer pipe are both uneven.

[0010] Further, the first muffler pipe comprises: a first outer pipe, a first inner pipe and a bent plate;

[0011] The first inner tube is sleeved inside the first outer tube, and a distance is left between the first inner tube and the first outer tube;

[0012] The two ends of the first outer tube are respectively sealed and connected to the two ends of the first inner tube through connecting plates;

[0013] The inner wall surface of the first inner tube is in a concave-convex structure, and a through hole is provided at the bottom of the concave part;

[0014] The bending plates are provided in plurality and are evenly spaced and arranged between the first outer tube and the first inner tube;

[0015] One end of the first inner tube and one end of the first outer tube are both connected to the air inlet of the fan.

[0016] Furthermore, the space between the adjacent curved plates is filled with a plurality of sound-absorbing balls, and each sound-absorbing ball is provided with a plurality of penetrating

[0017] Furthermore, the first inner tube has a conical structure, and a small-diameter port of the first inner tube is arranged toward the second muffler tube.

[0018] Furthermore, a plurality of protrusions are arranged at intervals on the inner wall of the first inner tube, grooves are arranged between adjacent protrusions, and the through hole is arranged at the bottom of the groove.

[0019] Further, the second muffler pipe comprises: a second outer pipe, a second inner pipe, a splitter plate and a muffler plate;

[0020] The second inner tube is sleeved in the second outer tube, and a distance is left between the second inner tube and the second outer tube;

[0021] The two ends of the second outer tube are respectively sealed and connected to the two ends of the second inner tube through connecting plates;

[0022] The splitter plates are arranged at intervals on the inner wall of the second inner tube, and the splitter plates are arranged obliquely and inclined toward the first muffler tube;

[0023] The through hole is provided on the tube wall of the second inner tube between adjacent diverter plates;

[0024] There are multiple silencer plates, which are evenly spaced between the second inner tube and the second outer tube. Each silencer plate is provided with a penetrating silencer hole. One end of the second inner tube and the second outer tube is connected to the air outlet of the fan.

[0025] Beneficial effects of the utility model:

[0026] By setting the inner wall of the silencer pipe to a concave-convex structure, the noise can be reflected to a large extent, thereby attenuating the noise. The silencer pipe has a double-layer structure. When the fan is working, wind can easily enter the interlayer, and a sound-absorbing component is provided in the interlayer to absorb the noise. Since the wind changes its flow direction many times, the noise is greatly attenuated, and the sound-absorbing component works synchronously, making the noise reduction effect of the fan more obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the internal structure connection of the silencer pipe provided by the utility model.

[0029] Figure numerals: 1 is a fan, 2 is a first outer tube, 3 is a first inner tube, 4 is a bending plate, 5 is a sound-absorbing ball, 6 is a second outer tube, 7 is a second inner tube, 8 is a diverter plate, and 9 is a silencer plate. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] See also Figure 1 , a ventilator, comprising: a fan 1, and a first silencer pipe and a second silencer pipe respectively arranged at an air inlet and an air outlet of the fan 1;

[0032] The first silencer pipe and the second silencer pipe are double-layer structures, and both have interlayers;

[0033] The inner walls of the first muffler pipe and the second muffler pipe are both provided with through holes communicating with the interlayer;

[0034] Sound absorbing components are arranged in the interlayers;

[0035] The inner walls of the first silencer pipe and the second silencer pipe are both uneven.

[0036] Among them, the main invention point of the present application is that, under the premise of setting the inner wall of the silencer pipe as a concave-convex structure, the silencer pipe is set to a double-layer structure. When the wind enters the silencer pipe, on the one hand, the concave-convex structure of the inner wall is used to attenuate the noise, and at the same time, the wind is introduced into the interlayer to attenuate the noise again and absorb the noise at the same time.

[0037] In some embodiments, the first muffler pipe comprises: a first outer pipe 2, a first inner pipe 3 and a bent plate 4;

[0038] The first inner tube 3 is sleeved inside the first outer tube 2, and a distance is left between the first inner tube 3 and the first outer tube 2;

[0039] The two ends of the first outer tube 2 are respectively sealed and connected to the two ends of the first inner tube 3 through connecting plates;

[0040] The inner wall surface of the first inner tube 3 is in a concave-convex structure, and a through hole is provided at the bottom of the concave part;

[0041] The bending plates 4 are provided in plurality and are evenly spaced and arranged between the first outer tube 2 and the first inner tube 3;

[0042] One end of the first inner tube 3 and one end of the first outer tube 2 are both connected to the air inlet of the fan 1;

[0043] The space between the adjacent curved plates is filled with a plurality of sound-absorbing balls 5, each of which is provided with a plurality of penetrating

[0044] The first inner tube 3 is in a conical structure, and the small diameter end of the first inner tube 3 is arranged toward the second muffler tube;

[0045] A plurality of protrusions are arranged at intervals on the inner wall of the first inner tube 3 , grooves are arranged between adjacent protrusions, and the through holes are arranged at the bottoms of the grooves.

[0046] Among them, the first silencer pipe is mainly used to eliminate noise before the wind enters the fan. Specifically, when the wind enters the silencer pipe along the first inner pipe, the first inner pipe has a conical structure, which will gather the wind. As a result, the resistance gradually increases when the wind enters the fan, thereby increasing the residence time of the wind in the first inner pipe, causing the wind to attenuate on the uneven inner wall of the first inner pipe, making it easier for the wind to enter the interlayer and attenuate again. At the same time, the sound-absorbing ball absorbs the noise carried by the wind in the interlayer and the noise generated by the fan itself, thereby greatly attenuating the noise.

[0047] The sound-absorbing ball is made of materials with sound-absorbing effects, such as sponge, foam plastic, etc.

[0048] In order to increase the heart sound effect, a plurality of interconnected small holes can be set on the surface of the sound-absorbing ball to increase the propagation path of wind in the sound-absorbing cotton, thereby increasing the noise reduction effect.

[0049] In some embodiments, the second muffler pipe comprises: a second outer pipe 6, a second inner pipe 7, a splitter plate 8 and a muffler plate 9;

[0050] The second inner tube 7 is sleeved in the second outer tube 6, and a distance is left between the second inner tube 7 and the second outer tube 6;

[0051] The two ends of the second outer tube 6 are respectively sealed and connected to the two ends of the second inner tube 7 through connecting plates;

[0052] The splitter plates 8 are arranged at intervals on the inner wall of the second inner tube 7, and the splitter plates 8 are arranged obliquely and inclined toward the first muffler pipe;

[0053] The through hole is provided on the tube wall of the second inner tube 7 between adjacent diverter plates 8;

[0054] The muffler plates 9 are provided in plurality and are evenly spaced between the second inner tube 7 and the second outer tube 6, and each muffler plate 9 is provided with a muffler hole therethrough;

[0055] One end of the second inner tube and the second outer tube is connected to the air outlet of the fan.

[0056] Among them, the function of the second silencer pipe is to reduce the noise of the wind discharged by the fan. Specifically, after the fan outlet sends the wind into the second inner tube, due to the diverter plate arranged on the second inner tube (the principle is similar to the internal structure of the muffler), the wind passes through the second inner tube, which is equivalent to the effect of combing hair backwards, thereby attenuating the noise carried by the wind. Part of the noise will enter the interlayer, be absorbed by the silencer plate, and be reflected inside the interlayer, thereby attenuating the noise again.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ventilator, comprising a fan, and a first silencer pipe and a second silencer pipe respectively arranged at the air inlet and the air outlet of the fan, characterized in that ； The first silencer pipe and the second silencer pipe are double-layer structures, and both have interlayers; The inner walls of the first muffler pipe and the second muffler pipe are both provided with through holes communicating with the interlayer; Sound absorbing components are arranged in the interlayers; The inner walls of the first silencer pipe and the second silencer pipe are both uneven.

2. The ventilator according to claim 1, characterized in that The first muffler pipe comprises: a first outer pipe, a first inner pipe and a bent plate; The first inner tube is sleeved inside the first outer tube, and a distance is left between the first inner tube and the first outer tube; The two ends of the first outer tube are respectively sealed and connected to the two ends of the first inner tube through connecting plates; The inner wall surface of the first inner tube is in a concave-convex structure, and a through hole is provided at the bottom of the concave part; The bending plates are provided in plurality and are evenly spaced and arranged between the first outer tube and the first inner tube; One end of the first inner tube and one end of the first outer tube are both connected to the air inlet of the fan.

3. The ventilator according to claim 2, characterized in that The space between the adjacent bending plates is filled with a plurality of sound-absorbing balls, and each sound-absorbing ball is provided with a plurality of penetrating ones.

4. The ventilator according to claim 2, characterized in that The first inner tube has a conical structure, and a small-diameter port of the first inner tube is arranged toward the second muffler tube.

5. The ventilator according to claim 2, characterized in that: A plurality of protrusions are arranged at intervals on the inner wall of the first inner tube, grooves are arranged between adjacent protrusions, and the through holes are arranged at the bottoms of the grooves.

6. The ventilator according to claim 1, characterized in that The second muffler pipe comprises: a second outer pipe, a second inner pipe, a splitter plate and a muffler plate; The second inner tube is sleeved in the second outer tube, and a distance is left between the second inner tube and the second outer tube; The two ends of the second outer tube are respectively sealed and connected to the two ends of the second inner tube through connecting plates; The splitter plates are arranged at intervals on the inner wall of the second inner tube, and the splitter plates are arranged obliquely and inclined toward the first muffler tube; The through hole is provided on the tube wall of the second inner tube between adjacent diverter plates; The muffler plates are provided in plurality and are evenly spaced between the second inner tube and the second outer tube, and each of the muffler plates is provided with a muffler hole penetrating therethrough; One end of the second inner tube and the second outer tube is connected to the air outlet of the fan.

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