CN111561484A

CN111561484A - Silencing flow passage device

Info

Publication number: CN111561484A
Application number: CN202010534775.2A
Authority: CN
Inventors: 朱晶; 张佳; 郭建明; 乐志超; 杜文芝; 李鑫; 赵帅
Original assignee: Likang Pharmaceutical Technology Jiangsu Co ltd; Jiangsu Yuyue Medical Equipment and Supply Co Ltd; Jiangsu Yuyue Information System Co Ltd; Suzhou Yuyue Medical Technology Co Ltd; Suzhou Medical Appliance Factory; Nanjing Yuyue Software Technology Co Ltd
Current assignee: Likang Pharmaceutical Technology Jiangsu Co ltd; Jiangsu Yuyue Medical Equipment and Supply Co Ltd; Jiangsu Yuyue Information System Co Ltd; Suzhou Yuyue Medical Technology Co Ltd; Suzhou Medical Appliance Factory; Nanjing Yuyue Software Technology Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2020-08-21
Also published as: WO2021248720A1

Abstract

The invention discloses a silencing flow passage device, which comprises a silencing flow passage main body (6) and an airflow generator (3); the silencing flow passage main body (6) is provided with a partition plate (60) which divides the silencing flow passage main body (6) into a first chamber (61) and a second chamber (62); a second chamber air inlet (6202) is arranged on the partition plate (60); a gas flow passage for communicating an air inlet on the silencing flow passage main body (6) with an air inlet (6202) of the second chamber is formed in the first chamber (61); the second chamber (62) houses an airflow generator (3). Compared with the prior noise reduction technology, the noise reduction flow channel device has an obviously better noise reduction effect.

Description

Silencing flow passage device

Technical Field

The invention belongs to the field of medical instruments, and particularly relates to a silencing flow passage device used in a breathing machine. Its application in ventilator equipment is described here, but it should be understood that the features of the invention can be applied not only as a separate module in other fields, for example: a silencing device of the invasive ventilator; or as an integral part of the ventilator apparatus.

Background

In recent years, with the increasing of environmental pollution (haze) and the existence of special work (work exposed to dust work environment), more and more respiratory tract lung diseases are generated, and meanwhile, a respirator is taken as an effective means capable of assisting spontaneous respiration and occupies an important position in the field of modern medicine, so that the use rate of the noninvasive ventilator in personal families and hospitals is higher and higher.

The operating principle of the respirator is mainly that positive pressure airflow is generated by driving a blower and is input to a patient port. During operation of the ventilator, noise is inevitably generated. Since the application scenario of the ventilator usually involves the sleep of the patient, how to control the noise of the ventilator to the minimum range is always an important issue in the ventilator field.

During the operation of the respirator, the main sources of noise are: 1. vibration and rotation mechanical sound generated when the blower works; 2. wind noise is generated in the flow passage and the pipeline by the gas. Currently, the silencing schemes for most ventilators are: 1. porous materials such as sponge are adopted for sound absorption; 2. damping the vibration source by adopting flexible materials such as silica gel and the like; 3. and a long flow passage or an arc flow passage is adopted for sound insulation. The disadvantages of the above techniques: 1. the porous material has poor stability, and the noise reduction system has large volume due to large-area use; 2. too long air passages lead to the fact that the air passage system cannot flexibly change the direction, and the output efficiency of positive pressure gas is seriously reduced.

Disclosure of Invention

In view of the above technical problems, the present invention is directed to solving the problems of minimizing noise generated in a flow passage by a blower and gas in a ventilator; and on the other hand, the volume of the noise reduction system is controlled, and the output efficiency of the positive pressure gas is improved.

In order to achieve the purpose, the invention adopts the technical scheme that:

the invention provides a silencing flow passage device which comprises a silencing flow passage main body 6 and an airflow generator 3. The silencing flow passage body 6 is provided with a partition plate 60 which divides the silencing flow passage body into a first chamber 61 and a second chamber 62; a second chamber inlet 6202 is provided on the partition 60; a gas flow passage communicating the inlet port of the silencing flow passage body 6 with the second chamber inlet port 6202 is formed in the first chamber 61; the second chamber 62 houses the airflow generator 3.

One preferred mode is as follows: the gas flow path is a single flow path leading in a circular pattern to the second chamber inlet 6202.

Further, a baffle 623 and/or a first chamber porous material 7 are/is arranged outside the second chamber air inlet 6202.

Further, the opening of the baffle 623 is close to the opening of the gas channel; the space between the flow guide barrier 623 and the gas flow channel is filled with the first chamber porous material 7.

Another preferred mode is as follows: the gas flow path is a flow-splitting flow path leading to the second chamber inlet 6202 through an opening of the flow-splitting flow path.

Further, the opening of the diversion baffle 623 is far away from the opening of the diversion flow channel; the first chamber porous material 7 is disposed corresponding to the opening of the baffle 623.

In order to further reduce noise, the side wall of the gas flow passage is provided with a silencing partition plate with silencing characteristics.

The silencing partition is a plane partition inclined along the gas flowing direction. Or in other modes, the sound attenuation baffle is an arc-shaped curved baffle bent along the gas flow direction. Or in other modes, the silencing partition plate is a U-shaped partition plate connected to two side walls of the gas flow channel, and two side vertical surfaces of the U-shaped partition plate are inclined along the gas flowing direction.

Furthermore, the silencing partition plates are symmetrically arranged along the center line of the gas flow passage.

Further, the airflow generator 3 is suspended within the second chamber 62 by the flexible support 12 and/or the second chamber porous material 12. In a preferred form, the airflow generator 3 is fitted with a support 4 mounted within the second chamber 62 by at least two flexible supports 12 and a second chamber porous material 12.

Further, the device also comprises an element for monitoring the gas flow: a flow rate detecting element 9 is installed in the air inlet of the silencing flow passage main body 6.

Silencing flow channel device gas flow direction principle: the gas enters from the gas inlet, flows through the flow detection element 9 in the gas inlet pipe, enters the gas flow channel of the first chamber 61, enters the second chamber gas inlet 6202 through the diversion baffle 623, enters the second chamber 62 from the first chamber 61, is sucked by the gas inlet end of the blower 3, and flows out from the gas outlet after being compressed and rotated.

The invention has the following beneficial effects: the invention provides a silencing flow passage device, which is internally provided with a silencing baffle scheme and is combined with a flexible support of an airflow generator, so that the noise of a breathing machine is effectively reduced; a flow dividing channel is arranged in the first chamber, so that the flow velocity of gas is reduced, and the noise reduction effect is achieved; the diversion flow channel reduces the volume of the noise reduction system and improves the output efficiency of positive pressure gas. Compared with the prior noise reduction technology, the silencing flow channel device has an obviously better noise reduction effect.

Drawings

Fig. 1 is a plan view of a silencing flow path embodiment 1 of an embodiment of the present invention.

Fig. 2 is a perspective view and a partially enlarged view of a silencing flow path embodiment 1 of an embodiment of the present invention.

Fig. 3 is a plan view of a silencing flow path embodiment 2 of an embodiment of the present invention.

Fig. 4 is a perspective view and a partially enlarged view of a silencing flow path embodiment 2 of an embodiment of the present invention.

Fig. 5 is a plan view of a silencing flow path scheme 3 of the embodiment of the present invention.

Fig. 6 is a perspective view and a partially enlarged view of a silencing flow path embodiment 3 of an embodiment of the present invention.

Fig. 7 is a perspective view of a silencing flow path embodiment 1 of an embodiment of the present invention.

Fig. 8 is a bottom perspective view of a sound-deadening flow passage scheme 1 of the embodiment of the invention.

Fig. 9 is a perspective flow chart of the device module of the sound-deadening flow path scheme 1 of the embodiment of the present invention.

Fig. 10 is a top view of a split flow combined silencing flow path embodiment 1 of the present invention.

Fig. 11 is a perspective view of a flow dividing combination silencing flow path scheme 1 according to an embodiment of the present invention.

Fig. 12 is a perspective, flow diagram of an apparatus module of split-flow combined silencing flow path scheme 1 in an embodiment of the invention.

Fig. 13 is a top view of a silencing flow channel device according to an embodiment of the invention.

Fig. 14 is a cross-sectional flow diagram of fig. 13 taken along line a-a.

Fig. 15 is an exploded view of components of a muffling flow passage apparatus according to an embodiment of the present invention.

In the figure: 1 is an upper cover, 2 is a sealing element, 3 is an airflow generator, 4 is a support, 5 is an air outlet, 6 is a main body of a silencing flow channel, 60 is a partition plate, 61 is a first chamber, 62 is a second chamber, 621 is a boundary partition plate, 622 is a middle partition plate, 623 is a flow guide partition plate, 624-1 is a first silencing partition plate scheme, 624-2 is a second silencing partition plate, 624-3 is a third silencing partition plate, 6201 is a single flow channel, 6202 is an air inlet of the second chamber, 630 is a flow dividing partition plate, 6301 is a first flow dividing flow channel, 6302 is a second flow dividing flow channel, 7 is a porous material of the first chamber, 8 is a bottom cover, 9 is a flow detection element, 10 is an air inlet, 11 is a porous material of the second chamber, and 12 is a flexible support.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following embodiments and accompanying drawings.

Example one

As shown in fig. 15, the present embodiment provides a silencing flow passage device for use in a ventilator, which is assembled by an upper cover 1, a blower 3, a silencing flow passage body 6, a bottom cover 8, and a sealing member 2.

As shown in fig. 1 to 9, the silencing flow path body 6 is provided with a partition plate 60 that divides the silencing flow path body into a first chamber 61 and a second chamber 62. A middle partition 622 is arranged in the first chamber 61, and the middle partition 622 and the boundary partition 621 form a single flow passage 6201; meanwhile, a pair of first silencing partition 624-1 (the first silencing partition 624-1 is a flat partition inclined in the gas flow direction) or a second silencing partition 624-2 (the second silencing partition 624-2 is an arc-shaped curved partition curved in the gas flow direction) having the same characteristics and being symmetrical to the center line is provided in the single flow passage 6201, or the silencing partition is provided as a U-shaped partition, that is, a third silencing partition 624-3, connected between the middle partition 622 and the boundary partition 621, and both side elevations of the U-shaped partition are inclined in the gas flow direction.

The inner side of the middle partition 622 is provided with a flow guide partition 623 and a first chamber porous material 7.

Referring to fig. 15, the second chamber 62 contains an airflow generator 3. in this embodiment, the airflow generator 3 is a blower with a bracket 4 suspended from the second chamber 62 by at least two flexible brackets 12 and the second chamber porous material 12.

As shown in fig. 9, the flow direction principle of the silencing flow passage device is as follows: the gas enters from the gas inlet, flows through the flow detection element in the gas inlet pipe, enters the external annular flow channel of the first chamber, enters the gas inlet 6202 of the second chamber through the flow guide partition plate 623, enters the second chamber from the first chamber, is sucked by the gas inlet end of the blower, and flows out from the gas outlet after being compressed and rotated.

Example two

As shown in fig. 15, the present embodiment provides a silencing flow passage device for the inside of a respirator, which is formed by assembling an upper cover 1, a blower 3, a silencing flow passage body 6, a bottom cover 8 and a sealing member.

As shown in fig. 7 to 8, the silencing flow path body 6 is provided with a partition plate 60 that divides the silencing flow path body into a first chamber 61 and a second chamber 62. As shown in fig. 10 and 11, a dividing partition 630 is disposed in the first chamber 61, and the dividing partition 630 and the boundary partition 621 form a first dividing flow passage 6301 and a second dividing flow passage 6302; meanwhile, a pair of first silencing partition 624-1, a second silencing partition 624-2 or a third silencing partition 624-3 which have the same characteristics and are symmetrical with the center line are arranged in the first diversion flow passage 6301 and the second diversion flow passage 6302.

The inner side of the flow dividing partition 630 is provided with a flow guiding partition 623 and a first chamber porous material, and the first chamber porous material 7 is arranged corresponding to the opening of the flow guiding partition 623.

Referring to fig. 15, the second chamber 62 houses the blower 3, and the blower 3 houses the support frame 4 suspended within the second chamber 62 by at least two flexible support frames 12 and/or a second chamber porous material.

As shown in fig. 12 to 14, the flow direction principle of the silencing flow passage device is as follows: gas enters from the gas inlet, flows through the flow detection element in the gas inlet pipe, and enters the external annular flow channel of the first chamber: the first diversion flow passage 6301 and the second diversion flow passage 6302 enter the second chamber air inlet 6202 through the diversion baffle 623, air enters the second chamber from the first chamber, is sucked by the air inlet end of the blower 3, and the air is compressed and rotated to flow out from the air outlet.

The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention falls within the protection scope of the present invention.

Claims

1. A silencing flow passage device is characterized in that: comprises a silencing flow passage main body (6) and an airflow generator (3);

the silencing flow passage main body (6) is provided with a partition plate (60) which divides the silencing flow passage main body (6) into a first chamber (61) and a second chamber (62); a second chamber air inlet (6202) is arranged on the partition plate (60); a gas flow passage for communicating an air inlet on the silencing flow passage main body (6) with an air inlet (6202) of the second chamber is formed in the first chamber (61); the second chamber (62) houses an airflow generator (3).

2. The acoustic flow conduit device of claim 1, wherein:

the gas flow channel is a single flow channel and annularly leads to the second chamber gas inlet (6202).

3. The acoustic flow conduit device of claim 2, wherein:

a diversion baffle plate (623) and/or a first chamber porous material (7) are/is arranged on the outer side of the second chamber air inlet (6202); the opening of the flow guide clapboard (623) is close to the opening of the gas flow channel; filling the space between the flow guiding partition plate (623) and the gas flow channel with a first chamber porous material (7).

4. The acoustic flow conduit device of claim 1, wherein:

the gas flow channel is a flow dividing flow channel and leads to the second chamber air inlet (6202) through an opening of the flow dividing flow channel.

5. The acoustic flow conduit device of claim 4, wherein:

a diversion baffle plate (623) and/or a first chamber porous material (7) are/is arranged on the outer side of the second chamber air inlet (6202); the opening of the flow guide clapboard (623) is far away from the opening of the flow distribution channel; the first chamber porous material (7) is arranged corresponding to the opening of the flow guide clapboard (623).

6. The acoustic flow conduit device according to any one of claims 1 to 5, wherein:

and the side wall of the gas flow passage is provided with a silencing partition plate with silencing characteristics.

7. The acoustic flow conduit device of claim 6, wherein:

the silencing partition plate is a plane partition plate inclined along the gas flowing direction.

8. The acoustic flow conduit device of claim 6, wherein:

the silencing partition plate is an arc-shaped curved surface partition plate which is bent along the gas flowing direction.

9. The acoustic flow conduit device of claim 6, wherein:

the silencing partition plate is a U-shaped partition plate connected to two side walls of the gas flow channel, and vertical surfaces of two sides of the U-shaped partition plate are inclined along the flowing direction of gas.

10. The acoustic flow conduit device of claim 1, wherein:

the airflow generator (3) is suspended within the second chamber (62) by a flexible support (12) and/or a second chamber porous material (12); and a flow detection element (9) is arranged in an air inlet on the silencing flow passage main body (6).