Resonance type noise reduction structure of breathing machine and portable breathing machine

Abstract

The utility model belongs to the technical field of breathing machines, and provides a breathing machine resonance type noise reduction structure and a portable breathing machine, the breathing machine resonance type noise reduction structure comprises a shell, an air duct and a cavity are arranged in the shell, the air inlet end of the air duct is communicated with the outside, and the air outlet end of the air duct is communicated with the cavity; the fan is mounted in the shell, and an air inlet of the fan is communicated with the cavity; the at least one resonance plate is arranged in the air channel and arranged from the air inlet end to the air outlet end, a plurality of through holes penetrating through the resonance plate are formed in the resonance plate, the resonance plate and the inner wall of the shell are spaced to form a resonance cavity, and the resonance cavity is filled with sound absorption materials. According to the resonance type noise reduction structure of the breathing machine, the resonance plate is arranged in the air duct, the resonance cavity is formed by the interval between the resonance plate and the inner wall of the shell, the sound absorption material is filled in the resonance cavity, and the resonance noise elimination of the resonance cavity and the sound absorption of the sound absorption material are combined for noise reduction, so that the good noise reduction effect of the breathing machine is achieved; and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ventilators, in particular to a ventilator resonance type noise reduction structure and a portable ventilator. Background Art

[0002] As a device with artificial ventilation function, ventilator has been widely used in the treatment of respiratory failure caused by various reasons, sleep apnea hypopnea syndrome and other diseases, and it occupies a very important position in the field of modern medicine. As people pay more attention to respiratory treatment, the performance requirements of ventilators are getting higher and higher. Among them, the indicator that users can easily perceive is noise. Noise directly affects whether users can fall asleep, especially when they first use it. It can be used as a basis for judging whether users are willing to accept long-term non-invasive and non-respiratory treatment.

[0003] In the prior art, ventilators mainly achieve noise reduction by installing sound-absorbing cotton in the internal air duct. However, using simple sound-insulating cotton for sound insulation and sound absorption cannot achieve the ideal noise reduction effect. The noise reduction effect is poor, resulting in excessive noise when the ventilator is in use, seriously affecting the sleep quality of patients and their families, and poor user experience. Utility Model Content

[0004] The utility model provides a resonance noise reduction structure for a ventilator, aiming to solve the problems of poor noise reduction effect and poor user experience of the ventilator in the prior art.

[0005] The utility model is implemented by providing a resonant noise reduction structure for a ventilator, comprising:

[0006] A shell, wherein an air duct and a cavity are provided in the shell, an air inlet end of the air duct is connected to the outside, and an air outlet end of the air duct is connected to the cavity;

[0007] A fan installed in the housing, wherein an air inlet of the fan is connected to the cavity; and

[0008] At least one resonance plate is arranged in the air duct and from the air inlet end to the air outlet end, the resonance plate is provided with a plurality of through holes penetrating therethrough, the resonance plate and the inner wall of the shell are spaced apart to form a resonance cavity, and the resonance cavity is filled with sound absorbing material.

[0009] Preferably, the sound-absorbing material is sound-absorbing cotton.

[0010] Preferably, the resonant noise reduction structure of the ventilator includes two resonance plates arranged in the air duct, the two resonance plates are respectively spaced apart from the inner wall of the shell to form a resonance cavity, and the two resonance plates are relatively spaced apart to form a flow channel for air flow from the air inlet end to the air outlet end.

[0011] Preferably, the resonant noise reduction structure of the ventilator further includes a guide plate disposed between the two resonance plates and used to guide the airflow from the air inlet end to the air outlet end; and / or,

[0012] The resonant noise reduction structure of the ventilator also includes a connecting plate arranged between the two resonance plates, and the two resonance plates are connected and fixed by the connecting plate.

[0013] Preferably, a fixing plate for supporting and fixing the resonance plate is provided on the inner wall of the shell, and the resonance plate is fixed on the fixing plate.

[0014] Preferably, it also includes:

[0015] A plurality of first air inlet columns are connected to the air inlet end of the air duct, and each of the first air inlet columns is penetrated by a first ventilation hole communicating with the air duct.

[0016] Preferably, it also includes:

[0017] A front cover connected to the shell, the front cover is provided with a plurality of second air inlet columns opposite to the plurality of first air inlet columns, each of the second air inlet columns is penetrated by a second ventilation hole, the front cover is provided with an air inlet hole connecting the outside with the plurality of second ventilation holes, the second ventilation holes are relatively spaced from the plurality of first ventilation holes and are connected through a connecting cavity.

[0018] Preferably, the shell includes a first shell and a second shell covering the first shell, and the second shell and the first shell cover each other to form the air duct and the cavity.

[0019] Preferably, a connecting hole communicating with the cavity is provided on a side wall of the air duct close to the air outlet end.

[0020] The utility model also provides a portable ventilator, comprising the above-mentioned ventilator resonance noise reduction structure.

[0021] The utility model provides a resonant noise reduction structure for a ventilator, in which at least one resonant plate is arranged in the air duct, and a resonant cavity is formed by the interval between the resonant plate and the inner wall of the shell. When air enters the air duct, the air enters the resonant cavity through the through holes on the resonant plate. The air in the resonant cavity will vibrate violently, thereby generating heat energy by friction with the wall of the resonant cavity, so that the gas consumes energy in the flow process, and the airflow does work through dissipation, which has an obvious noise reduction effect. At the same time, the sound-absorbing material in the resonant cavity absorbs the energy of the airflow to further reduce the noise. The resonance sound elimination of the resonant cavity and the sound absorption of the sound-absorbing material are combined to reduce the noise, thereby achieving a good noise reduction effect of the ventilator and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1A three-dimensional schematic diagram of a resonant noise reduction structure for a ventilator provided in an embodiment of the utility model;

[0023] Figure 2 A three-dimensional exploded view of a resonant noise reduction structure for a ventilator provided in an embodiment of the utility model;

[0024] Figure 3 A partial structural schematic diagram of a resonant noise reduction structure for a ventilator provided in an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of another part of the structure of the resonant noise reduction structure of the ventilator provided in an embodiment of the utility model;

[0026] Figure 5 A schematic diagram of the structure of a resonance plate of a resonant noise reduction structure for a ventilator provided in an embodiment of the utility model;

[0027] Figure 6 A schematic diagram of a top view of a resonant noise reduction structure for a ventilator provided in an embodiment of the utility model;

[0028] Figure 7 For along Figure 6 Schematic diagram of the cross section along line AA.

[0029] Description of reference numerals:

[0030] 1. Shell; 15. First shell; 16. Second shell; 18. Third shell; 10. Air duct; 12. Cavity; 101. Air inlet; 102. Air outlet; 2. Fan; 21. Air inlet; 3. Resonance plate; 31. Through hole; 5. Resonance cavity; 4. Sound-absorbing material; 32. Flow channel; 103. Connecting hole; 7. Fixing plate; 8. Guide plate; 9. Connecting plate; 17. First air inlet column; 171. First ventilation hole; 6. Front cover; 61. Second air inlet column; 611. Second ventilation hole; 612. Air inlet; 11. Connecting cavity; 63. Mounting hole; 23. Air outlet pipe; 19. PCB board. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] A resonant noise reduction structure for a ventilator provided by an embodiment of the utility model has at least one resonant plate arranged in the air duct, and a resonant cavity is formed by the resonance plate and the inner wall of the shell. When air enters the air duct, the air enters the resonant cavity through the through holes on the resonance plate. The air in the resonant cavity will vibrate violently, thereby generating heat energy by friction with the wall of the resonant cavity, so that the gas consumes energy during the flow, and the airflow does work through dissipation, which has an obvious noise reduction effect. At the same time, the sound-absorbing material in the resonant cavity absorbs the energy of the airflow to further reduce the noise. The noise is reduced by combining the resonance sound elimination of the resonant cavity and the sound absorption of the sound-absorbing material, thereby achieving a good noise reduction effect of the ventilator and improving the user experience.

[0033] Please refer to Figure 1-Figure 7 The present invention provides a resonant noise reduction structure for a ventilator, comprising:

[0034] The housing 1 has an air duct 10 and a cavity 12 therein, wherein an air inlet end 101 of the air duct 10 is in communication with the outside, and an air outlet end 102 of the air duct 10 is in communication with the cavity 12;

[0035] A fan 2 is installed in the housing 1, and an air inlet 21 of the fan 2 is connected to the cavity 12; and

[0036] At least one resonance plate 3 is arranged in the air duct 10 and from the air inlet end 101 to the air outlet end 102. The resonance plate 3 is provided with a plurality of through holes 31 running through it. The resonance plate 31 is spaced apart from the inner wall of the shell 1 to form a resonance cavity 5, and the resonance cavity 5 is filled with sound absorbing material 4.

[0037] In an embodiment of the utility model, a resonant noise reduction structure of a ventilator is provided by arranging a resonance plate 3 in the air duct 10, and forming a resonance cavity 5 by using the resonance plate 3 and the inner wall of the shell 1. Air enters the air duct 10 from the air inlet end 101 of the air duct 10 and flows towards the air outlet end 102, and finally enters the air inlet 21 of the fan 2 through the air outlet end 102 of the air duct 10. During the process of air flowing through the air duct 10, since the resonance cavity 5 is formed by the resonance plate 3 and the inner wall of the shell 1, the air enters the resonance cavity 5 through the through hole 31 on the resonance plate 3. When the frequency of the incoming air is consistent with the frequency of the resonance cavity 5, the air in the resonance cavity 5 will vibrate violently, thereby generating heat energy by friction with the wall of the resonance cavity 5, so that the gas consumes energy during the flow, realizes airflow dissipation work, and has a significant noise reduction function; at the same time, the sound-absorbing material 4 in the resonance cavity 5 absorbs the airflow energy to further reduce the noise. In this way, the noise is reduced by combining the resonance sound elimination of the resonance cavity 5 and the sound absorption of the sound-absorbing material 4, which can achieve a good noise reduction effect of the ventilator and enhance the user experience.

[0038] In the embodiment of the utility model, the number of resonance plates 3 can be one or more than two. Among them, the accompanying drawings only illustrate a specific embodiment in which there are two resonance plates 3. When the number of resonance plates 3 is one, the upper and lower surfaces of the resonance plate 3 are respectively separated from the inner wall of the shell 1 to form a resonance cavity 5; when the number of resonance plates 3 is more than two, the resonance plates 3 are arranged relative to each other up and down, the resonance plate 3 close to the inner wall of the shell 1 is separated from the inner wall of the shell 1 to form a resonance cavity 5, and a resonance cavity 5 is formed between two adjacent resonance plates 3, so that multiple resonance cavities 5 can be formed.

[0039] Please refer to Figure 3-Figure 7 As a preferred embodiment of the utility model, the resonant noise reduction structure of the ventilator includes two resonance plates 3 arranged in the air duct 10, the two resonance plates 3 are respectively spaced apart from the inner wall of the shell 1 to form a resonance cavity 5, and the two resonance plates 3 are relatively spaced apart to form a flow channel 32 for air flow from the air inlet end 101 to the air outlet end 102.

[0040] In this embodiment, the number of resonance plates 3 is two, and the two resonance plates 3 are spaced apart from the inner wall of the housing 1 to form a resonance cavity 5, and the two resonance plates 3 are spaced apart to form a flow channel 32. In this embodiment, air flows from the air inlet end 101 to the air outlet end 102 along the flow channel 32 formed by the two resonance plates 3 being spaced apart from each other, and enters the corresponding resonance cavity 5 through the through holes 31 on the two resonance plates 3. When the air frequency in the air duct 10 is consistent with the frequency of the resonance cavity 5, the air in the two resonance cavities 5 will vibrate violently, thereby generating heat energy by friction with the wall of the resonance cavity 5, so that the gas consumes energy during the flow process, realizes airflow dissipation work, and has obvious noise reduction; at the same time, the sound-absorbing material 4 in the two resonance cavities 5 absorbs the energy of the airflow to further reduce the noise. In this way, the noise reduction is achieved by combining the resonance silencing of the resonance cavity 5 and the sound absorption of the sound-absorbing material 4, which can achieve a good noise reduction effect of the ventilator and improve the user experience. Moreover, the two resonance plates 3 are relatively spaced apart to form a flow channel 32 for air flow from the air inlet end 101 to the air outlet end 102, so that the air can flow stably toward the air outlet end 102. The flow channel 32 formed by the two resonance plates 3 relatively spaced apart can also act as a resonance chamber, which can further enhance the resonance sound elimination effect.

[0041] As an embodiment of the present invention, the sound absorbing material 4 can be specifically sound absorbing cotton, which can achieve a good sound absorbing effect. Of course, the sound absorbing material 4 can also be other materials with sound absorbing function.

[0042] Please refer to Figure 3 As an embodiment of the present invention, a connecting hole 103 communicating with the cavity 12 is provided on the side wall of the air duct 10 near the air outlet end 102, so as to facilitate the connection between the air duct 10 and the cavity 12. The specific shape of the connecting hole 103 is not limited and can be flexibly set in practical applications.

[0043] As an embodiment of the present invention, the air duct 10 is arranged at the periphery of the cavity 12, and the air duct 10 is arranged to semi-surround the cavity 12. The shape of the resonance plate 3 matches the shape of the air duct 10, and the resonance plate 3 and the air duct 10 can be L-shaped, U-shaped, or C-shaped, which can extend the air flow path and facilitate noise reduction.

[0044] Please refer to Figure 2 , Figure 3 and Figure 7 As an embodiment of the utility model, the housing 1 includes a first shell 15 and a second shell 16 covering the first shell 15 , and the second shell 16 and the first shell 15 cover each other to form an air duct 10 and a cavity 12 .

[0045] In this embodiment, the second shell 16 and the first shell 15 are provided, and the second shell 16 and the first shell 15 cover each other to form the air duct 10 and the cavity 12, which is convenient for the installation of the fan 2 and the resonance plate 3. Among them, when the number of the resonance plate 3 is one, the upper surface of the resonance plate 3 and the inner wall of the second shell 16 are separated to form a resonance cavity 5, and the lower surface of the resonance plate 3 and the inner wall of the first shell 15 are separated to form a resonance cavity 5. When the number of the resonance plates 3 is two, the upper surface of the upper resonance plate 3 and the inner wall of the second shell 16 are separated to form a resonance cavity 5, and the lower surface of the lower resonance plate 3 and the inner wall of the first shell 15 are separated to form a resonance cavity 5.

[0046] As an embodiment of the present invention, a fixing plate 7 for supporting and fixing the resonance plate 3 is provided on the inner wall of the housing 1, and the resonance plate 3 is fixed on the fixing plate 7. Specifically, the fixing plate 7 is integrally formed on the inner wall of the first housing 15.

[0047] In this embodiment, the resonance plate 3 is supported and fixed by the fixing plate 7, so that the resonance plate 3 is spaced apart from the inner wall of the housing 1 to form the resonance cavity 5, and the resonance plate 3 is fixed and installed. There are multiple fixing plates 7, and the multiple fixing plates 7 are sequentially spaced along the air duct 10, and the resonance plate 3 is supported and fixed on the multiple fixing plates 7.

[0048] Please refer to Figure 5 As an embodiment of the utility model, it also includes a guide plate 8 arranged between the two resonance plates 3 and used to guide the air flow from the air inlet end 101 to the air outlet end 102.

[0049] In this embodiment, the guide plate 8 can be specifically arc-shaped, and the guide plate 8 is used to move the airflow in the flow channel 32 from the air inlet end 101 to the air outlet end 102, so that the airflow can be ensured to move evenly and stably toward the air outlet end 102, and the guide plate 8 can improve the noise reduction effect. Among them, the specific number of the guide plates 8 is two, and they are located at the corner position of the flow channel 32, which is more conducive to guiding the airflow toward the air outlet end 102.

[0050] As an embodiment of the utility model, it also includes a connecting plate 9 arranged between the two resonance plates 3 , and the two resonance plates 3 are connected and fixed by the connecting plate 9 .

[0051] In this embodiment, the two resonance plates 3 are connected by a connecting plate 9, so that the two resonance plates 3 are stably spaced apart, which is beneficial to improving the working reliability of the resonant noise reduction structure of the ventilator.

[0052] Please refer to Figure 3-Figure 4 , as an embodiment of the utility model, further comprising:

[0053] A plurality of first air inlet columns 17 are connected to the air inlet end 101 of the air duct 10 , and each of the first air inlet columns 17 is penetrated by a first ventilation hole 171 communicating with the air duct 10 .

[0054] In this embodiment, the specific number of the first air inlet columns 17 is not limited, and the cross-sectional shape of the first ventilation holes 171 can be flexibly set, for example, the cross-sectional shape of the first ventilation holes 171 can be a circular hole or a polygonal hole. Figure 4 The cross-sectional shape of the first ventilation hole 171 shown in FIG. 1 is a pentagonal hole. Preferably, the plurality of first air inlet columns 17 and the first shell 15 are integrally formed.

[0055] In this embodiment, by providing a plurality of first air inlet columns 17, the outside air first passes through the plurality of first air inlet columns 17 before entering the air duct 10, so that the front and rear volumes of the air flow can be changed, which is helpful for noise reduction.

[0056] As an embodiment of the utility model, it also includes:

[0057] The front cover 6 is connected to the shell 1, and is provided with a plurality of second air inlet columns 61 opposite to the plurality of first air inlet columns 17. Each second air inlet column 61 is penetrated by a second ventilation hole 611. The front cover 6 is provided with an air inlet hole 612 connected to the outside and connected to the plurality of second ventilation holes 611. The second ventilation holes 611 are relatively spaced apart from the plurality of first ventilation holes 171 and are connected through the connecting cavity 11.

[0058] In this embodiment, by setting a second air inlet column 61, the multiple second ventilation holes 611 on the second air inlet column 61 are relatively spaced from the multiple first ventilation holes 171 and are connected through a connecting cavity 11. In this way, the length of the air inlet path can be extended, the energy of the air entering the air duct 10 can be reduced, which is beneficial to reducing noise, and the volume of the air can be changed before and after the flow before entering the air duct 10, which is further beneficial to sound reduction.

[0059] As an embodiment of the utility model, the front cover 6 is penetrated with a mounting hole 63 , and the air outlet pipe 23 connected to the air outlet of the fan 2 passes through the mounting hole 63 and communicates with the outside, so as to facilitate fixing the air outlet pipe 23 .

[0060] Please refer again Figure 2 As an embodiment of the utility model, the resonant noise reduction structure of the ventilator also includes:

[0061] a third shell 18 covering the second shell 16; and

[0062] The PCB board 19 is disposed between the second shell 16 and the third shell 18 , and the PCB board 19 is electrically connected to the fan 2 for controlling the operation of the fan 2 .

[0063] In this embodiment, the PCB board 19 is laid flat between the second shell 16 and the third shell 18 , which facilitates the arrangement of the PCB board 19 .

[0064] The embodiment of the utility model also provides a portable ventilator, including the ventilator resonance noise reduction structure of the above embodiment. The portable ventilator provided by the embodiment of the utility model can effectively improve the noise reduction effect of the portable ventilator by setting the ventilator resonance noise reduction structure of the above embodiment.

[0065] A resonant noise reduction structure for a ventilator provided by an embodiment of the utility model has at least one resonant plate 3 arranged in an air duct 10, and a resonant cavity 5 is formed by the resonant plate 3 and the inner wall of the shell 1. When air enters the air duct 10, the air enters the resonant cavity 5 through the through hole 31 on the resonant plate 3. The air in the resonant cavity 5 will vibrate violently, thereby generating heat energy by friction with the wall of the resonant cavity 5, so that the gas consumes energy during the flow, and the airflow does work through dissipation, which has an obvious noise reduction effect. At the same time, the sound-absorbing material 4 in the resonant cavity 5 absorbs the energy of the airflow to further reduce the noise. The noise reduction is achieved by combining the resonance sound elimination of the resonant cavity 5 and the sound absorption of the sound-absorbing material 4, thereby achieving a good noise reduction effect of the ventilator and improving the user experience.

[0066] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A resonant noise reduction structure for a ventilator, characterized in that: include: A shell, wherein an air duct and a cavity are provided in the shell, an air inlet end of the air duct is connected to the outside, and an air outlet end of the air duct is connected to the cavity; A fan installed in the housing, wherein an air inlet of the fan is connected to the cavity; and At least one resonance plate is arranged in the air duct and from the air inlet end to the air outlet end, the resonance plate is provided with a plurality of through holes penetrating therethrough, the resonance plate and the inner wall of the shell are spaced apart to form a resonance cavity, and the resonance cavity is filled with sound absorbing material.

2. The resonant noise reduction structure of a ventilator according to claim 1, characterized in that: The sound absorbing material is sound absorbing cotton.

3. The resonant noise reduction structure of a ventilator according to claim 1, characterized in that: The resonant noise reduction structure of the ventilator includes two resonance plates arranged in the air duct, the two resonance plates are respectively spaced apart from the inner wall of the shell to form a resonance cavity, and the two resonance plates are relatively spaced apart to form a flow channel for air flow from the air inlet end to the air outlet end.

4. The resonant noise reduction structure of the ventilator according to claim 3, characterized in that: The resonant noise reduction structure of the ventilator further includes a guide plate disposed between the two resonance plates and used for guiding the airflow from the air inlet end to the air outlet end; and / or, The resonant noise reduction structure of the ventilator also includes a connecting plate arranged between the two resonance plates, and the two resonance plates are connected and fixed by the connecting plate.

5. The resonant noise reduction structure of a ventilator according to claim 1, characterized in that: A fixing plate for supporting and fixing the resonance plate is provided on the inner wall of the shell, and the resonance plate is fixed on the fixing plate.

6. The resonant noise reduction structure of a ventilator according to claim 1, characterized in that: Also includes: A plurality of first air inlet columns are connected to the air inlet end of the air duct, and each of the first air inlet columns is penetrated by a first ventilation hole communicating with the air duct.

7. The resonant noise reduction structure of a ventilator according to claim 6, characterized in that: Also includes: A front cover connected to the shell, the front cover is provided with a plurality of second air inlet columns opposite to the plurality of first air inlet columns, each of the second air inlet columns is penetrated by a second ventilation hole, the front cover is provided with an air inlet hole connecting the outside with the plurality of second ventilation holes, the second ventilation holes are relatively spaced from the plurality of first ventilation holes and are connected through a connecting cavity.

8. The resonant noise reduction structure of a ventilator according to claim 1, characterized in that: The housing includes a first shell and a second shell covering the first shell, and the second shell and the first shell cover each other to form the air duct and the cavity.

9. The resonant noise reduction structure of a ventilator according to claim 1, characterized in that: A connecting hole communicating with the cavity is provided on the side wall of the air duct close to the air outlet end.

10. A portable ventilator, characterized in that: It comprises a resonant noise reduction structure for a ventilator as described in any one of claims 1 to 9.

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