CN113309741B

CN113309741B - Breathing machine and fan subassembly and fan noise reduction device thereof

Info

Publication number: CN113309741B
Application number: CN202110789232.XA
Authority: CN
Inventors: 李晓明; 李春雷
Original assignee: Beijing Eternity Electronic Technology Co ltd
Current assignee: Beijing Eternity Electronic Technology Co ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-04-29
Anticipated expiration: 2041-07-13
Also published as: CN113309741A

Abstract

The application discloses breathing machine and fan subassembly and fan noise reduction device thereof. The fan noise reduction device comprises a first flexible pipe (10) and a first porous buffer plate (20), wherein the first flexible pipe (10) is arranged at the inlet end of the fan, the first porous buffer plate (20) is spaced at the two sides of the first flexible pipe (10), so that a first buffer space is formed between the end parts of the first flexible pipe (10), and a first concave-convex structure is arranged on the inner wall of the first flexible pipe (10). The intake airflow may be dispersed in the first buffer space to alleviate the impact force at the center position of the airflow, thereby reducing the noise caused thereby. The air current flows through first flexible pipe, can reduce the impact force of air current through assaulting first concave-convex structure, and then reduce the noise. The fan noise reduction device can effectively reduce noise and does not need to use sponge, and various safety problems caused by long-term use of the sponge are avoided.

Description

Breathing machine and fan subassembly and fan noise reduction device thereof

Technical Field

The application relates to the field of respirators, in particular to a respirator and a fan assembly and a fan noise reduction device thereof.

Background

The ventilator can be used for replacing automatic ventilation manually in clinical medicine at present, and is generally applied to respiratory failure caused by various reasons, management of respiratory anesthesia in an operation period, respiratory emergency treatment and resuscitation.

The ventilator needs to provide an external air source when working, in the conventional ventilator design, in the ventilator using the blower, the air source is generally provided by the blower, and the oxygen bottle or the oxygen system of the medical institution provides a medical oxygen source. However, in the operation process of the blower, the noise is large, and especially the noise generated at the inlet of the blower is large, which has great influence on the patient and the surrounding environment, so that the application of the noise reduction device of the blower in the respirator becomes very important.

In the prior art, in order to achieve the purpose of noise reduction, a sponge is usually used for building an air passage, so that the air flow of a fan passes through the air passage, and the noise is reflected by a porous structure of the sponge to reduce the noise. However, the sponge is directly contacted with the gas inhaled into the patient, so that the safety hazard in use exists. Particularly, the sponge can generate scraps in the manufacturing and using processes, and the fallen scraps can enter the body of a patient along with gas to cause adverse effects on the patient; in addition, the sponge can age and deteriorate along with use, and the noise reduction effect is reduced along with the sponge; in addition, it is usually necessary to use an adhesive fixing sponge, and it is necessary to strictly control the precipitation of harmful substances in the adhesive.

Therefore, how to safely and effectively reduce the noise of the fan becomes a technical problem to be solved in the field.

Disclosure of Invention

In view of this, the present application provides a fan noise reduction device for a ventilator, so as to safely and effectively reduce fan noise.

According to the application, the fan noise reduction device of the breathing machine is provided, wherein the fan noise reduction device comprises a first flexible pipe and a first porous buffer board which are arranged at the inlet end of the fan, the first porous buffer board is spaced from the first flexible pipe to be arranged on two sides of the first flexible pipe, so that a first buffer space is formed between the end parts of the first flexible pipe, and the inner wall of the first flexible pipe is provided with a first concave-convex structure.

Optionally, the fan noise reduction device includes a first housing, the first flexible pipe and the first porous buffer plate are respectively mounted on the first housing, and the first flexible pipe is configured to be capable of vibrating relative to the first housing.

Optionally, the fan noise reduction device comprises a plurality of the first flexible tubes disposed between the first porous buffer plates; and/or, the total cross-sectional area of the openings of the first perforated buffer plate is 40-50% of the cross-sectional area of the first buffer space.

Optionally, the fan noise reduction device comprises a second flexible pipe and a second porous buffer plate, the second flexible pipe is arranged at the outlet end of the fan, the second porous buffer plate is spaced from the second flexible pipe and is arranged on two sides of the second flexible pipe, so that a second buffer space is formed between the end portions of the second flexible pipe, and a second concave-convex structure is arranged on the inner wall of the second flexible pipe.

Optionally, the fan noise reduction device includes a second housing, the second flexible pipe and the second porous buffer plate are respectively mounted on the second housing, and the second flexible pipe is configured to be capable of vibrating relative to the second housing.

Optionally, the fan noise reduction device comprises a plurality of second flexible tubes arranged between the second porous buffer plates; and/or the total cross-sectional area of the openings of the second perforated buffer plate is 40-50% of the cross-sectional area of the second buffer space.

Optionally, the fan noise reduction device includes a bent and extended air passage disposed at an outlet end of the fan.

The application also provides a fan assembly of a respirator, wherein, fan assembly includes fan and the fan noise reduction device of this application.

Optionally, a flexible sealing sleeve is arranged at an inlet and/or an outlet of the fan; and/or the fan assembly comprises a fan shell, and the fan is arranged on the fan shell through a damping piece.

The present application further provides a ventilator, wherein the ventilator includes the fan assembly of the present application.

According to the technical scheme of this application, the air current of admitting air can be dispersed in first buffering space to alleviate the impact force of air current central point department, thereby reduce the noise that results from this. The air current flows through first flexible pipe, can reduce the impact force of air current through assaulting first concave-convex structure, and then reduce the noise. The fan noise reduction device can effectively reduce noise and does not need to use sponge, and various safety problems caused by long-term use of the sponge are avoided.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate an embodiment of the invention and, together with the description, serve to explain the invention. In the drawings:

FIG. 1 is an exploded schematic view of a blower assembly of a ventilator according to one embodiment of the present application;

FIG. 2 is a perspective view of a blower assembly of a ventilator according to another embodiment of the present application;

FIG. 3 is a schematic view illustrating the structure of the outlet end of the fan in FIG. 2;

FIG. 4 is a cross-sectional view of FIG. 2;

fig. 5 is a schematic view showing the internal structure of fig. 2.

Detailed Description

The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In this application, where the contrary is not stated, the use of directional words such as "upper, lower, left and right" generally means upper, lower, left and right as illustrated with reference to the accompanying drawings; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

According to an aspect of the present application, a fan noise reduction device of a ventilator is provided, wherein the fan noise reduction device includes a first flexible pipe 10 and a first porous buffer plate 20 disposed at an inlet end of a fan, the first porous buffer plate 20 is spaced apart from the first flexible pipe 10 disposed at two sides of the first flexible pipe 10 to form a first buffer space between ends of the first flexible pipe 10, and an inner wall of the first flexible pipe 10 is provided with a first concave-convex structure.

Use the fan noise reduction device of this application, the air current of admitting air can be in first buffer space dispersion to alleviate the impact force of air current central point department, thereby reduce the noise that leads to from this. The airflow flowing through the first flexible pipe 10 can reduce the impact force of the airflow by impacting the first concave-convex structure, thereby reducing noise. The fan noise reduction device can effectively reduce noise and does not need to use sponge, and various safety problems caused by long-term use of the sponge are avoided.

Specifically, the two sides of the first flexible tube 10 form a first buffer space respectively, which is described along the flowing direction of the air flow: when the intake air flow (mixed oxygen and air) enters the first buffer space, the air flow is dispersed and slowed down in the first buffer space by the first porous buffer plate 20, and the impact force of the flow is reduced. Subsequently, the sufficiently dispersed air flow flows through the first flexible tube 10, and the first concave-convex structure functions like a porous structure of a sponge, and can reduce noise by reflecting noise. The air flow exiting the first flexible tube 10 enters another first buffer space, again dispersing and damping the impact force. The airflow for noise reduction can continue to enter the fan through the inlet of the fan. Therefore, the noise reduction device of the application can obviously reduce the noise of the air flow entering the fan and reduce the noise from the source.

In order to form the first buffer space, the fan noise reduction device comprises a first shell 30, and the first flexible pipe 10 and the first porous buffer plate 20 are respectively mounted on the first shell 30. Specifically, the first perforated buffer plate 20 may be fixed to the first housing 30 at a predetermined distance from the first flexible tube 10. To further improve the noise reduction effect, the first flexible tube 10 is arranged to be able to vibrate with respect to the first housing 30. Thus, when the airflow passes through the first flexible pipe 10, the collision of the airflow with the first concave-convex structure enables the first flexible pipe 10 to vibrate relative to the first shell 30, that is, the first shell 30 allows the first flexible pipe 10 to perform limited oscillation, so as to further reduce the impact of the airflow and better realize noise reduction. Specifically, both ends of the first flexible pipe 10 may be mounted to the first housing 30 through mounting plates 90, and the mounting plates 90 are provided with mounting holes allowing the first flexible pipe 10 to oscillate limitedly.

To ensure the flow rate of the intake air flow and uniform noise reduction, the fan noise reduction device includes a plurality of the first flexible tubes 10 disposed between the first perforated buffer plates 20, as shown in fig. 1, 4 and 5. That is, in terms of the flowing direction of the air flow (see the arrow direction), the air flow dispersed in the upstream first buffer space can rapidly and uniformly enter the downstream first buffer space through the plurality of first flexible tubes 10, so that throttling caused by too much speed reduction of the air flow is avoided, and the air flow can be uniformly dispersed through the first flexible tubes 10 to effectively reduce noise.

In addition, the first porous buffer plate 20 functions to form a first buffer space so that the air flow is dispersed in the first buffer space. To avoid the formation of the throttling, the total cross-sectional area of the openings of the first perforated buffer plate 20 may be controlled, preferably, the total cross-sectional area of the openings of the first perforated buffer plate 20 is 40-50% of the cross-sectional area of the first buffer space. More specifically, the first perforated buffer plate 20 may have a size of 9cm × 7.5cm, and have 12 × 10 openings arranged in a matrix, each opening having a size of 5.5mm to 6 mm.

As described above, the fan noise reduction device of the present application provides a noise reduction effect at the inlet end of the fan through the first flexible tube 10 and the first perforated buffer plate 20. To further enhance noise reduction, a noise reduction effect may also be provided at the outlet end of the fan.

According to one embodiment of the present application, a structure similar to the inlet end may be provided at the outlet end of the fan. Specifically, as shown in fig. 1, the fan noise reduction device includes a second flexible pipe 40 and a second porous buffer plate 50, which are disposed at an outlet end of the fan, the second porous buffer plate 50 is disposed at two sides of the second flexible pipe 40 at an interval from the second flexible pipe 40, so as to form a second buffer space between the second flexible pipe 40 and an end of the second flexible pipe 40, and a second concave-convex structure is disposed on an inner wall of the second flexible pipe 40. The discharged air flow may be dispersed in the second buffer space to alleviate the impact force at the center position of the air flow, thereby reducing the noise caused thereby. The airflow passes through the second flexible tube 40, and the impact force of the airflow can be reduced by impacting the second concave-convex structure, thereby reducing noise.

In order to form the second buffer space, the fan noise reduction device comprises a second housing, and the second flexible pipe 40 and the second porous buffer plate 50 are respectively mounted on the second housing. Specifically, the second perforated buffer plate 50 may be fixed to the second housing at a predetermined distance from the second flexible tube 40. To further improve the noise reduction effect, the second flexible tube 40 is arranged to be able to vibrate with respect to the second housing. Thus, when the airflow passes through the second flexible tube 40, the collision of the airflow with the second concave-convex structure enables the second flexible tube 40 to vibrate relative to the second housing, that is, the second housing allows the second flexible tube 40 to oscillate limitedly, so as to further reduce the impact of the airflow and better reduce the noise.

To ensure the flow rate of the intake air flow and uniform noise reduction, the fan noise reduction device includes a plurality of the second flexible tubes 40 disposed between the second perforated baffle 50. That is to say, in terms of the flow direction of the air flow, the air flow dispersed in the upstream second buffer space can rapidly and uniformly enter the downstream second buffer space through the plurality of second flexible tubes 40, so that throttling caused by too much speed reduction of the air flow is avoided on one hand, and on the other hand, the air flow can be uniformly dispersed and effectively reduced in noise through the second flexible tubes 40. The gas flow passing through the openings of the downstream second perforated baffle 50 is discharged through the outlet duct 70 to be supplied to the downstream equipment of the ventilator.

In addition, the second porous buffer plate 50 functions to form a second buffer space so that the air flow is dispersed in the second buffer space. To avoid the formation of the throttling, the total cross-sectional area of the openings of the second perforated buffer plate 50 may be controlled, preferably, the total cross-sectional area of the openings of the second perforated buffer plate 50 is 40-50% of the cross-sectional area of the second buffer space. The specific dimensional parameters of the second cellular cushioning plate 50 may be designed with reference to the first cellular cushioning plate 20.

In the present application, the first flexible tube 10 and the second flexible tube 40 may be made of various suitable flexible materials, for example, silicone tubes. The first perforated buffer plate 20 and the second perforated buffer plate 50 may be made of various materials with appropriate strength, such as aluminum.

According to another embodiment of the present application, as shown in fig. 3, the fan noise reduction device includes a bent and extended air passage P disposed at an outlet end of the fan. Through making the air current discharge along the air flue P that the bending extended, can block the combustion gas stream, reduce its impact force, realize that the secondary falls and make an uproar. Meanwhile, the air flow is bent to flow, so that the air flow discharged can be stabilized, and the air flow entering the human body is more stable.

Wherein the air passage may be formed in a suitable manner to have a shape extending in a bent state. In the embodiment shown in fig. 3, the outlet end of the blower has a straight channel (which may be formed by a straight cavity 60) with baffles 80 disposed therein to separate the straight channel into a curved air path of a desired shape (e.g., S-shaped).

According to another aspect of the present application, a fan assembly of a ventilator is provided, wherein the fan assembly comprises a fan and the fan noise reduction device of the present application.

Through the fan noise reduction device, noise reduction can be performed on at least the inlet end of the fan.

In addition, as shown in fig. 2, 4 and 5, the fan assembly may include a mixing space S located upstream of the upstream first buffer space, and an air inlet 240 and an oxygen inlet 250 communicated with the mixing space, the air inlet 240 and the oxygen inlet 250 may be vertically disposed to each other so as to be sufficiently mixed in the mixing space S, and the mixed intake air flow is noise-reduced by the fan noise reduction device. Wherein a filter element 270 (e.g., a sponge) is disposed within the air intake 240 to provide filtration to the intake air flow.

In addition, in order to reduce noise at the inlet and outlet of the fan 200, a flexible sealing sleeve 210 is arranged at the inlet and/or outlet of the fan 200. In the embodiment shown in fig. 4 and 5, the inlet and the outlet of the fan 200 are vertically arranged, and a tubular flexible sealing sleeve 210 is arranged at the inlet and the outlet respectively to provide sealing, shock absorbing and noise reducing effects at the inlet and the outlet.

In addition, in order to reduce the noise of the vibration of the blower 200 itself, the blower assembly includes a blower housing 220, and the blower 200 is mounted to the blower housing 220 by a vibration damping member to reduce the vibration of the blower 200 itself and the noise generated thereby. Specifically, the vibration dampers may include a flexible end-face seal 230 disposed on an end face opposite the inlet of the blower 200 and a sponge 260 disposed on the outer periphery of the blower 200. The fan 200 is in contact with the fan case 220 through the end surface seal cover 230 and the sponge 260, so that the fan 200 can be fixed to the fan case 220 in a cushioning manner, and noise generated by collision of vibration of the fan 200 with the fan case 220 can be reduced.

According to another aspect of the present application, there is provided a ventilator, wherein the ventilator comprises the blower assembly of the present application.

The utility model provides a breathing machine has the device of making an uproar that falls of fan subassembly, can show the noise reduction to do not have the potential safety hazard because of using the sponge air flue to produce.

The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications all belong to the protection scope of the present application.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in the present application.

In addition, any combination of the various embodiments of the present application can be made, and the same should be considered as the disclosure of the present invention as long as the combination does not depart from the spirit of the present application.

Claims

1. The utility model provides a device of making an uproar falls in fan of breathing machine, its characterized in that, the device of making an uproar falls in fan is including setting up first flexible pipe (10) and first porous buffer board (20) at the entry end of fan, first porous buffer board (20) interval in first flexible pipe (10) set up the both sides of first flexible pipe (10), with form first buffering space between the tip of first flexible pipe (10), the inner wall of first flexible pipe (10) is provided with first concave-convex structure.

2. The fan noise reducer of a respirator according to claim 1, comprising a first housing (30), wherein the first flexible tube (10) and the first perforated baffle (20) are mounted to the first housing (30), respectively, and wherein the first flexible tube (10) is configured to vibrate relative to the first housing (30).

3. Fan noise reduction device according to claim 1, characterized in that it comprises a plurality of said first flexible tubes (10) arranged between said first perforated buffer plates (20); and/or the total cross-sectional area of the openings of the first perforated buffer plate (20) is 40-50% of the cross-sectional area of the first buffer space.

4. The fan noise reduction device of the ventilator according to claim 1, wherein the fan noise reduction device comprises a second flexible tube (40) disposed at an outlet end of the fan, and a second porous buffer plate (50), the second porous buffer plate (50) is disposed on two sides of the second flexible tube (40) at an interval from the second flexible tube (40) to form a second buffer space with an end of the second flexible tube (40), and an inner wall of the second flexible tube (40) is provided with a second concave-convex structure.

5. The fan noise reducer of claim 4, wherein the fan noise reducer comprises a second housing, the second flexible tube (40) and the second perforated baffle (50) being mounted to the second housing, respectively, the second flexible tube (40) being configured to vibrate relative to the second housing.

6. The fan noise reducer of claim 4, comprising a plurality of said second flexible tubes (40) disposed between said second perforated baffle plates (50); and/or the total cross-sectional area of the openings of the second perforated buffer plate (50) is 40-50% of the cross-sectional area of the second buffer space.

7. The fan noise reducer of claim 1, comprising a sinuously extending air path disposed at an outlet end of the fan.

8. A fan assembly for a ventilator, the fan assembly comprising a fan (200) and the fan noise reduction device of any of claims 1-7.

9. The blower assembly of a ventilator according to claim 8, wherein the inlet and/or outlet of the blower (200) is provided with a flexible sealing sleeve (210); and/or the fan assembly comprises a fan shell (220), and the fan (200) is mounted on the fan shell (220) through a damping piece.

10. A ventilator comprising the fan assembly of claim 8 or 9.