KR200418061Y1 - Environment affinity ? Low noise ventilator - Google Patents

Abstract

The present invention relates to a ventilator for discharging the contaminated air for a comfortable environment, the intake port consisting of a connecting pipe and a bell mouse having a radius of curvature with a quarter diameter of the connecting pipe, and connected to the connecting pipe The formed porous tube has a thickness of 0.7 to 0.8 mm and a diameter of 1 mm, and the porosity is perforated to partially open in the range of 10 to 20%, and the five porous plates formed at equal intervals to the outside of the porous tube have a thickness of 0.7 to 0.8 mm. 0.8 mm, 1 mm in diameter, perforated to open in the range of 1 to 5% of porosity, and the first and second spaces, third and fourth spaces, fifth and sixth spaces by the porous plate. A silencer composed of a first silencer constituting a case and a second silencer configured to face the first silencer so as to form a resonance space composed of a space, and a first silencer configured to face the outside of the porous tube formed with the multi-splash plate; It is formed between the second silencer, and provides a eco-friendly low-noise ventilation device characterized in that the exhaust port consisting of a nozzle that is connected to the second silencer of the silencer of the housing and the housing formed a fan on the inside and the outside.

The eco-friendly low noise ventilation device according to the present invention reduces the noise generated by the flow noise generated during inhalation because the air moves smoothly along the long curve of the bell mouse, which has a radius of curvature of 1/4 of the diameter of the connecting pipe. In addition, by converting the turbulent air flow flowing in various directions through the connecting pipe to move in the horizontal direction with the exhaust port to smoothly flow the air can reduce the generation of noise.

In addition, perforations are formed in the perforated tube around the fan where the noise is generated greatly, thereby facilitating the inflow of the noise into the resonance space of the first silencer, and at the same time, the noise repeatedly enters between the perforated tube, the resonance space, and the multi-strike plate. As a result of resonance, noise energy is dissipated into thermal energy and noise is reduced, and the noise of the low frequency band is effectively reduced by once again reducing the noise through the second silencer formed to face the first silencer. Can be.

In addition, since the first silencer and the second silencer do not contain a sound absorbing material such as glass fiber or polyurethane foam, the construction is convenient and the manufacturing cost can be reduced, and heat resistance, durability and moisture resistance are strong. Health problems or environmental pollution due to the scattering problem of the sound absorbing material can be prevented in advance.

Ventilation, Environment, Noise, Silencer, Connector, Bell Mouse

Description

Eco-friendly low noise ventilator {Environment affinity & Low noise ventilator}

1 is a cross-sectional view of a conventional ventilation device.

2 is a comparison diagram of sound pressure levels when a sound absorbing material is installed and removed in a conventional ventilation device.

3 is a perspective view of an environment-friendly low noise ventilation device according to the present invention.

4 is a cross-sectional perspective view of an environment-friendly low noise ventilation device according to the present invention.

5 is a cross-sectional view of an environment-friendly low noise ventilation device according to the present invention.

Figure 6 is a perspective view of a porous tube formed with a porous plate of the first silencer according to the present invention.

Figure 7 is a state diagram showing the flow of noise.

Figure 8 is a comparison of the sound pressure level when installing the bell mouse according to the present invention and the conventional bell mouse.

Fig. 9 is a comparison diagram of sound pressure levels when a connecting pipe is installed and removed.

Figure 10 is a comparison of sound pressure level of environmentally friendly low noise ventilation device according to the present invention and a conventional ventilation device.

Explanation of symbols on the main parts of the drawings

10 intake vent 11: bell mouse

12: connector 20: first silencer

21: perforation 22: porous tube

23: multi-attack plate 24: resonance space

24a: first space 24b: second space

24c: third space 24d: fourth space

24e: 5th space 24f: 6th space

25: case 30: second silencer

40: silencer 50: housing

51: fan 52: holder

60: exhaust port 61: nozzle portion

100: Eco-friendly low noise ventilation device

The present invention relates to an environment-friendly low-noise ventilation device, and more particularly, to reduce the noise generated in the entire frequency band while promoting the health and environmental protection of the human body, and in particular, to efficiently reduce the fan noise generated in the low frequency band. It relates to an environmentally friendly low noise ventilator.

1 is a cross-sectional view of a conventional ventilation apparatus, and FIG. 2 is a comparison diagram of sound pressure levels when a sound absorbing material is installed and removed in a conventional ventilation apparatus.

In the conventional ventilator, as shown in FIG. 1, when the fan 6 is operated, air is sucked in through the intake port 2 forming the bell mouse 1, which is generated at the same time as the intake of air. The noise is firstly reduced by the first silencer 5 composed of the porous tube 3 and the sound absorbing material 4.

Thereafter, the noise-reduced air is secondarily reduced in the second silencer 7 via the fan 6 and discharged out through the exhaust port 8.

By using the ventilation device as described above, the noise generated at 500Hz or more can be effectively reduced, but the radius of curvature of the bell mouse is small, so that the effect of reducing noise at the inlet side is insignificant. The performance of the low frequency band below 500Hz, which is frequently generated in the machine, is inadequate.

In addition, because it uses glass fiber, which is an environmentally harmful substance, or a sound absorbing material made of polyurethane foam, heat resistance, durability, and moisture resistance are not only weak, but also due to the increase in the manufacturing cost of the ventilator and environmental pollution due to the scattering of glass fiber. There was a problem causing.

The eco-friendly low noise ventilation device according to the present invention reduces the noise generated by the flow noise generated during inhalation because the air moves smoothly along the long curve of the bell mouse, which has a radius of curvature of 1/4 of the diameter of the connecting pipe. It is possible to reduce the generation of noise by smoothly flowing air by converting the turbulent air flow flowing in various directions through the connecting pipe to move in the horizontal direction with the exhaust port.

Another object of the present invention is to form a perforation in the perforated tube around the fan that generates a large amount of noise to promote the inflow of the noise into the resonant space of the first silencer, and at the same time the noise is between the perforated tube and the resonant space Noise is dissipated into thermal energy by resonant action caused by repetitive incidence, and the noise of low frequency band is once again reduced by the second silencer formed to face the first silencer. The purpose is to effectively reduce this.

In another object of the present invention, since the first silencer and the second silencer do not incorporate a sound absorbing material such as glass fiber or polyurethane foam, the construction is convenient and the manufacturing cost can be reduced, as well as heat resistance and durability. The moisture resistance is strong, and the purpose is to prevent the health problems or environmental pollution due to the scattering problem of the sound absorbing material in advance.

Environment-friendly low noise ventilation device of the present invention for achieving the above object is an intake port consisting of a connecting pipe and the bell mouse formed a radius of curvature with a quarter diameter of the connecting pipe, and a porous pipe formed connected to the connecting pipe The thickness of 0.7 ~ 0.8mm and the diameter of 1mm, the porosity is perforated to partially open in the range of 10 to 20%, the five porous plate formed at equal intervals to the outside of the porous tube has a thickness of 0.7 ~ 0.8mm, 1 mm in diameter, perforated so that the porosity is open in the range of 1 to 5%, and the resonance is composed of the first space, the second space, the third space, the fourth space, the fifth space and the sixth space by the multi-blow plate. Between the first silencer and the second silencer, a silencer composed of a first silencer and a second silencer configured to face the first silencer, the first silencer comprising a case outside the porous tube formed with the perforated plate to form a space. And an exhaust port including a housing configured to form a fan inwardly and a cradle outwardly, and a nozzle unit connected to the second silencer of the silencer.

Looking at the configuration of the environment-friendly low noise ventilation device of the present invention for solving the above problems are as follows.

Figure 3 is a perspective view of an eco-friendly low noise ventilation device according to the present invention, Figure 4 is a cross-sectional perspective view of an eco-friendly low noise ventilation device according to the present invention, Figure 5 is a cross-sectional view of an eco-friendly low noise ventilation device according to the present invention, Figure 6 7 is a perspective view showing a flow of noise, and FIG. 8 is a view illustrating a bell mouse according to the present invention and a conventional bell mouse installed. Figure 9 is a comparison of the sound pressure level, Figure 9 is a comparison of the sound pressure level when the connection pipe is installed and removed, Figure 10 is a comparison of the sound pressure level between the environmentally friendly low noise ventilation device and the conventional ventilation device according to the present invention.

First, the eco-friendly low noise ventilation device 100 is composed of the inlet 10, the silencer 40, the housing 50 and the exhaust port 60, as shown in FIG.

The inlet 10 is a bell mouse 11 and a side of the bell mouse 11 having a radius of curvature R formed at a quarter of the diameter of the connection pipe 12 as shown in FIGS. 3 to 5. It consists of a connection pipe 12 formed to be connected to.

The length of the connecting tube 12 is preferably adjusted according to the size of the device.

In addition, the silencer 40 is connected to one side of the connecting tube 12, as shown in Figures 3 to 6 has a thickness of 0.7 ~ 0.8mm and a diameter of 1mm, porosity is partially in the range of 10 to 20% A perforated 21 constitutes the perforated tube 22, and is formed on the outside of the perforated tube 22 to have a thickness of 0.7 to 0.8 mm, a diameter of 1 mm, and a perforation 21 to a porosity of 1 to 5%. Five porous plates 23 constitute the first space 24a, the second space 24b, the third space 24c, and the first space by the porous tube 22 having the porous plate 23 formed thereon. The case 25 outside the porous tube 22 in which the multi-strike plate 23 is formed so that the resonance space 24 including the fourth space d, the fifth space 24e, and the sixth space 24f is formed. It consists of a first silencer (20) and a second silencer (30) configured to face the first silencer (20).

The porous tube 22 of the muffler 40 including the first silencer 20 and the second silencer 30 may include a third space 24c and a fifth space (5c) to effectively reduce noise generated by the fan 51. It is preferable to drill 21 the part of the porous pipe 22 in which 24e) and the 6th space 24f are comprised.

In addition, the housing 50 is formed between the first silencer 20 and the second silencer 30, as shown in Figures 3 to 5, and forms a fan 51 for the flow of gas inwardly To configure the holder 52 to be suspended from the ceiling to the outside.

And, the exhaust port 60 is formed on one side of the second silencer 30 as shown in Figures 3 to 5 is composed of a nozzle portion 61 through which air is discharged.

Looking at the operation according to the configuration as described above are as follows.

First, when the power is applied to the eco-friendly low noise ventilation apparatus 100, the fan 51 is operated.

When the fan 51 is operated, noise is generated from the fan 51 and at the same time, air is sucked through the bell mouse 11 formed in the inlet 10 so that the flow noise is generated. Since the air is gently sucked in a long curved shape along the radius of curvature R of the bell mouse 11 formed to a quarter of the diameter of the connector 12, the flow noise generated when the air is sucked is reduced.

Here, the air sucked through the bell mouse 11 is sucked in an unstable state as a turbulent air flow sucked in various directions, while passing through the connection pipe 12 connected to the bell mouse 11, the connection pipe 12 By switching the turbulent air flow so as to move in a horizontal direction with the exhaust port 60, the air flows smoothly, and noise is reduced.

As described above, the flow noise passing through the connection pipe 12 has a thickness of 0.7 to 0.8 mm, a diameter of 1 mm, and a porosity of the first silencer 20 that is selectively perforated 21 in a range of 10 to 20%. It moves to the air pipe 22, the flow noise moved to the porous pipe 22 is a porous pipe 22 and the case 25 formed with a porous plate 23 through the perforations 21 of the porous pipe 22 Noise is reduced by a resonance action in which noise energy is dissipated into thermal energy by friction between the porous tube 22 and the resonance space 24 generated when the incident light enters the resonance space 24 formed by the combination of .

As described above, the noise incident into the coplanar space 24 through the perforations 21 of the perforated tube 22 is repetitive in the resonance space 24 through the perforations 21 formed in the five perforated plates 23. After the noise is reduced by the resonance action generated by the incident, the noise is reduced once again by the resonance action of the second silencer 30 formed to face the first silencer 20 via the fan 51. do.

At the same time, the fan noise generated by the fan 51 is reduced by the first silencer 20 and the second silencer 30 as described above.

As described above, the noise reduced by passing through the silencer 40 including the first silencer 20 and the second silencer 30 is discharged to the outside together with air through the exhaust port 60 formed by the nozzle unit 61. Noise can be effectively reduced without using sound absorbing materials that are harmful to the environment.

In addition, the porous tube 22 of the silencer 40 is drilled in the porous tube 22 of the third space 24c, the fifth space 24e, and the sixth space 24f of the resonance space 24. It is preferable to form 21 so that the noise generated largely in the fan 51 can be better incident into the resonance space 24 so as to effectively reduce the noise by the resonance phenomenon.

As illustrated in FIGS. 8 to 10, in order to compare the performance of the environment-friendly low noise ventilation device 100 and the conventional ventilation device, the test was commissioned by the Seoul National University of Noise and Vibration Research Center.

As shown in the results shown, when the bell mouse 11 and the connection pipe 12 according to the present invention was installed, the noise reduction effect was superior to the conventional ventilation device, and when using the resonance type silencer 40 of the present invention, It is possible to reduce the noise more effectively than when using the sound absorbing type of silencer. Especially, it can be seen that the noise reduction effect is excellent under 1500Hz.

The eco-friendly low noise ventilation device according to the present invention reduces the noise generated by the flow noise generated during inhalation because the air moves smoothly along the long curve of the bell mouse, which has a radius of curvature of 1/4 of the diameter of the connecting pipe. In addition, by converting the turbulent air flow flowing in various directions through the connecting pipe to move in the horizontal direction with the exhaust port to smoothly flow the air can reduce the generation of noise.

In addition, perforations are formed in the perforated tube around the fan where the noise is generated greatly, thereby facilitating the inflow of the noise into the resonance space of the first silencer, and at the same time, the noise repeatedly enters between the perforated tube, the resonance space, and the multi-strike plate. As a result of resonance, noise energy is dissipated into thermal energy to reduce noise, and the noise of the low frequency band can be effectively reduced by once again reducing the noise through the second silencer formed to face the first silencer. have.

In addition, since the first silencer and the second silencer do not contain a sound absorbing material such as glass fiber or polyurethane foam, the construction is convenient and the manufacturing cost can be reduced, and heat resistance, durability and moisture resistance are strong. It is a useful design that can prevent in advance the health problems or environmental pollution due to the scattering problem of the sound absorbing material.

Claims (2)

In the ventilator formed with a bell mouse on one side of the inlet port, a silencer is mounted on both sides of the fan, and an exhaust port, An inlet 10 formed of a connection pipe 12 and a bell mouse 11 having a radius of curvature R formed at a quarter diameter of the connection pipe 12; The porous pipe 22 formed by being connected to the connection pipe 12 has a thickness of 0.7 to 0.8 mm, a diameter of 1 mm, a perforation 21 to partially open in the range of 10 to 20% of porosity, and the porous pipe ( The five multi-strand plate 23 formed at equal intervals to the outside of the 22) is 0.7 to 0.8mm in thickness, 1mm in diameter, the perforation 21 to open in the range of 1 to 5% porosity, the multi-pore Resonance by plate 23 consisting of first space 24a, second space 24b, third space 24c, fourth space 24d, fifth space 25e and sixth space 24f A first silencer 20 constituting the case 25 and an outer side of the first silencer 20 configured to form an outer space of the porous tube 22 in which the space 24 is formed. Silencer 40 consisting of two silencers 30; A housing (50) formed between the first silencer (20) and the second silencer (30), constituting a fan (51) inwardly and a cradle (52) outwardly; Eco-friendly low noise ventilation device characterized in that the exhaust port (60) consisting of a nozzle unit 61 is connected to the second silencer (30) of the silencer (40).  The method of claim 1, The porous tube 22 of the silencer 40 including the first silencer 20 and the second silencer 30 is formed of the third space 24c, the fifth space 24e, and the fifth space by the multi-plate 23. Eco-friendly low-noise ventilation device characterized in that the perforated 21 to open the portion of the porous tube 22 is composed of six spaces (24f).

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