A sound-absorbing flow channel device

Abstract

The present invention discloses a silencing flow channel device, comprising a silencing flow channel main body (6) and an air flow generator (3); the silencing flow channel main body (6) is provided with a partition baffle (60), which divides the silencing flow channel main body (6) into a first chamber (61) and a second chamber (62); the partition baffle (60) is provided with a second chamber air inlet (6202); a gas flow channel communicating the air inlet on the silencing flow channel main body (6) and the second chamber air inlet (6202) is formed in the first chamber (61); and the air flow generator (3) is installed in the second chamber (62). Compared with the existing noise reduction technologies, the silencing flow channel device of the present invention has significantly better noise reduction effect.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and particularly relates to a silencing flow channel device for the interior of a ventilator. Its application in ventilator equipment is described herein, but it should be understood that the features of the present invention can not only be applied as a separate module in other fields, for example: a silencing device for an invasive ventilator; but also as a combined part within a ventilator equipment. Background Art

[0002] In recent years, with the aggravation of environmental pollution (haze) and the existence of special occupations (workers exposed to dust working environments), more and more respiratory and pulmonary diseases have emerged. At the same time, as an effective means to assist spontaneous breathing, ventilators play a very important role in the field of modern medicine. Therefore, the utilization rate of non-invasive ventilators in personal homes and hospitals is increasing.

[0003] The working principle of a ventilator mainly involves driving a blower to generate a positive-pressure air flow and input it into the patient port. During the operation of the ventilator, noise is inevitably generated. Since the application scenarios of ventilators usually involve the sleep of patients, how to control the noise of the ventilator within the minimum range has always been an important problem in the field of ventilators.

[0004] When a ventilator is operating, the main sources of noise are: 1. Vibration and rotational mechanical noise generated during the operation of the blower; 2. Wind noise generated by the gas in the flow channel and pipeline. Currently, the silencing solutions for most ventilators are: 1. Using porous materials such as sponges for sound absorption; 2. Using flexible materials such as silica gel to dampen the vibration source; 3. Using a long flow channel or an arc-shaped flow channel for sound insulation. The disadvantages of the above technologies are: 1. The stability of porous materials is poor, and large-area use results in a large volume of the noise reduction system; 2. An overly long airway causes the airway system to be unable to flexibly change direction, seriously reducing the output efficiency of positive-pressure gas. Utility Model Content

[0005] To solve the above technical problems, on the one hand, the present invention relates to controlling the noise generated by the blower and gas in the flow channel of the ventilator within the minimum range; on the other hand, it relates to controlling the volume of the noise reduction system and improving the output efficiency of positive-pressure gas.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] The present invention provides a sound - silencing flow channel device, including a sound - silencing flow channel main body 6 and an air flow generator 3. The sound - silencing flow channel main body 6 is provided with a dividing partition 60, which divides the sound - silencing flow channel main body into a first chamber 61 and a second chamber 62; a second chamber air inlet 6202 is provided on the dividing partition 60; a gas flow channel is formed in the first chamber 61 to connect the air inlet on the sound - silencing flow channel main body 6 and the second chamber air inlet 6202; the air flow generator 3 is installed in the second chamber 62.

[0008] A preferred way is that the gas flow channel is a single - flow channel, which is annularly guided to the second chamber air inlet 6202.

[0009] Furthermore, a flow - guiding partition 623 and / or a first - chamber porous material 7 are arranged outside the second chamber air inlet 6202.

[0010] Furthermore, the opening of the flow - guiding partition 623 is close to the opening of the gas flow channel; the space between the flow - guiding partition 623 and the gas flow channel is filled with the first - chamber porous material 7.

[0011] Another preferred way is that the gas flow channel is a split - flow channel, and is guided to the second chamber air inlet 6202 through the opening of the split - flow channel.

[0012] Furthermore, a flow - guiding partition 623 and / or a first - chamber porous material 7 are arranged outside the second chamber air inlet 6202.

[0013] Furthermore, the opening of the flow - guiding partition 623 is far from the opening of the split - flow channel; the first - chamber porous material 7 is arranged corresponding to the opening of the flow - guiding partition 623.

[0014] In order to further reduce noise, a sound - silencing partition with sound - silencing characteristics is provided on the side wall of the gas flow channel.

[0015] The sound - silencing partition is a flat partition inclined along the gas flow direction. Or in other ways, the sound - silencing partition is an arc - shaped curved surface partition bent along the gas flow direction. Or in other ways, the sound - silencing partition is a U - shaped partition connected to the two side walls of the gas flow channel, and the two vertical surfaces of the U - shaped partition are inclined along the gas flow direction.

[0016] Furthermore, the sound - silencing partition is symmetrically arranged along the center line of the gas flow channel.

[0017] Furthermore, the air flow generator 3 is suspended in the second chamber 62 through a flexible bracket 12 and / or a second - chamber porous material 11. In a preferred way, the air flow generator 3 is equipped with a bracket 4 and is installed in the second chamber 62 through at least two flexible brackets 12 and the second - chamber porous material 11.

[0018] Furthermore, it also includes an element for monitoring gas flow: a flow - detection element 9 is installed in the air inlet on the sound - silencing flow channel main body 6.

[0019] Principle of gas flow direction in the silencing flow channel device: The gas enters from the air inlet, flows through the flow rate detection element 9 in the intake pipe, enters the gas flow channel of the first chamber 61, and enters the air inlet 6202 of the second chamber through the guide partition 623. The gas enters the second chamber 62 from the first chamber 61 and is sucked into the intake end of the air flow generator 3. The gas is compressed and rotated and flows out from the air outlet.

[0020] The present invention has the following beneficial effects: The present invention provides a silencing flow channel device with a silencing partition scheme inside and a flexible bracket of the air flow generator, effectively reducing the noise of the ventilator; A shunt flow channel is provided in the first chamber to reduce the gas flow rate, thereby achieving a noise reduction effect; The shunt flow channel reduces the volume of the noise reduction system and improves the output efficiency of the positive pressure gas. The above two aspects prove that the silencing flow channel device of the present invention has a significantly better noise reduction effect compared with the existing noise reduction technologies. Description of the Drawings

[0021] Figure 1 It is a top view of the silencing flow channel scheme 1 of the embodiment of the present invention.

[0022] Figure 2 It is a perspective view and a partial enlarged view of the silencing flow channel scheme 1 of the embodiment of the present invention.

[0023] Figure 3 It is a top view of the silencing flow channel scheme 2 of the embodiment of the present invention.

[0024] Figure 4 It is a perspective view and a partial enlarged view of the silencing flow channel scheme 2 of the embodiment of the present invention.

[0025] Figure 5 It is a top view of the silencing flow channel scheme 3 of the embodiment of the present invention.

[0026] Figure 6 It is a perspective view and a partial enlarged view of the silencing flow channel scheme 3 of the embodiment of the present invention.

[0027] Figure 7 It is a three-dimensional perspective view of the silencing flow channel scheme 1 of the embodiment of the present invention.

[0028] Figure 8 It is a bottom three-dimensional view of the silencing flow channel scheme 1 of the embodiment of the present invention.

[0029] Figure 9 It is a three-dimensional streamline diagram of the device module of the silencing flow channel scheme 1 of the embodiment of the present invention.

[0030] Figure 10 It is a top view of the shunt combined with the silencing flow channel scheme 1 of the embodiment of the present invention.

[0031] Figure 11A perspective view of the shunt combined with the silencing flow channel solution 1 of the embodiment of the present invention.

[0032] Figure 12 A perspective view of the streamline diagram of the device module of the shunt combined with the silencing flow channel solution 1 of the embodiment of the present invention.

[0033] Figure 13 A top view of the silencing flow channel device of the embodiment of the present invention.

[0034] Figure 14 is Figure 13 The A-A sectional streamline diagram of

[0035] Figure 15 An exploded view of the components of the silencing flow channel device of the embodiment of the present invention.

[0036] In the figure: 1 is the upper cover, 2 is the seal, 3 is the air flow generator, 4 is the bracket, 5 is the air outlet, 6 is the main body of the silencing flow channel, 60 is the dividing partition, 61 is the first chamber, 62 is the second chamber, 621 is the boundary partition, 622 is the middle partition, 623 is the diversion partition, 624-1 is the first silencing partition solution, 624-2 is the second silencing partition, 624-3 is the third silencing partition, 6201 is the single flow channel, 6202 is the air inlet of the second chamber, 630 is the shunt partition, 6301 is the first shunt flow channel, 6302 is the second shunt flow channel, 7 is the porous material in the first chamber, 8 is the bottom cover, 9 is the flow detection element, 10 is the air inlet, 11 is the porous material in the second chamber, 12 is the flexible bracket. Specific embodiments

[0037] For the convenience of understanding by those skilled in the art, the present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

[0038] Embodiment 1

[0039] As Figure 15 shown, this embodiment provides a silencing flow channel device for the inside of a ventilator, and the silencing flow channel device is assembled from the upper cover 1, the air flow generator 3, the main body 6 of the silencing flow channel, the bottom cover 8 and the seal 2.

[0040] As Figures 1 to 9, the silencing flow channel main body 6 is provided with a dividing partition 60, which divides the silencing flow channel main 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 channel 6201; at the same time, a pair of first silencing partitions 624-1 (the first silencing partition 624-1 is a plane partition inclined along the gas flow direction) or a second silencing partition solution 624-2 (the second silencing partition solution 624-2 is an arc-shaped curved surface partition bent along the gas flow direction) with the same characteristics and symmetric with respect to the center line are arranged in the single flow channel 6201, or the silencing partition is arranged as a U-shaped partition, that is, a third silencing partition 624-3, which is connected between the middle partition 622 and the boundary partition 621, and the two side vertical surfaces of the U-shaped partition are inclined along the gas flow direction.

[0041] A flow guiding partition 623 and a first chamber porous material 7 are arranged inside the middle partition 622.

[0042] Such as Figure 15 , an air flow generator 3 is installed in the second chamber 62. In this embodiment, the air flow generator 3 is a blower, and a bracket 4 is installed on the blower, and it is suspended in the second chamber 62 through at least two flexible brackets 12 and a second chamber porous material 11.

[0043] Such as Figure 9 , the gas flow direction principle of the silencing flow channel device: The gas enters from the air inlet, flows through the flow detection element in the intake pipe, enters the external annular flow channel of the first chamber, enters the second chamber air inlet 6202 through the flow guiding partition 623, the gas enters the second chamber from the first chamber, is sucked into the intake end of the blower, and the gas flows out from the air outlet after being compressed and rotated.

[0044] Embodiment 2

[0045] Such as Figure 15 As shown, this embodiment provides a silencing flow channel device for the inside of a ventilator. The silencing flow channel device is formed by assembling an upper cover 1, an air flow generator 3, a silencing flow channel main body 6, a bottom cover 8, and a sealing member.

[0046] Such as Figures 7 to 8 , the silencing flow channel main body 6 is provided with a dividing partition 60, which divides the silencing flow channel main body into a first chamber 61 and a second chamber 62. Such as Figure 10 , Figure 11 , a shunt partition 630 is arranged in the first chamber 61, and the shunt partition 630 and the boundary partition 621 form a first shunt flow channel 6301 and a second shunt flow channel 6302; at the same time, a pair of first silencing partitions 624-1 or second silencing partitions 624-2, or a third silencing partition 624-3 with the same characteristics and symmetric with respect to the center line are arranged in the first shunt flow channel 6301 and the second shunt flow channel 6302.

[0047] Inside the shunt partition plate 630, a flow guiding partition plate 623 and a first chamber porous material are provided, and the first chamber porous material 7 is arranged corresponding to the opening of the flow guiding partition plate 623.

[0048] As Figure 15 , in the second chamber 62, an air flow generator 3 is installed. A bracket 4 is installed on the air flow generator 3 and is suspended in the second chamber 62 through at least two flexible brackets 12 and / or a second chamber porous material.

[0049] As Figures 12 to 14 , the gas flow principle of the sound absorption flow channel device: The gas enters from the air inlet, flows through the flow detection element in the intake pipe, and enters the external annular flow channel of the first chamber: the first shunt flow channel 6301 and the second shunt flow channel 6302, enters the second chamber air inlet 6202 through the flow guiding partition plate 623, the gas enters the second chamber from the first chamber, is sucked into the intake end of the air flow generator 3, and the gas flows out from the air outlet after being compressed and rotated.

[0050] The above embodiments are only used to illustrate the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the present invention.

Claims

1. A sound-absorbing flow channel device, characterized in that: it includes a sound-absorbing flow channel main body (6) and an air flow generator (3); the sound-absorbing flow channel main body (6) is provided with a dividing partition (60), which divides the sound-absorbing flow channel main body (6) into a first chamber (61) and a second chamber (62); a second chamber air inlet (6202) is provided on the dividing partition (60); a gas flow channel communicating the air inlet on the sound-absorbing flow channel main body (6) and the second chamber air inlet (6202) is formed in the first chamber (61); an air flow generator (3) is installed in the second chamber (62); the air flow generator (3) is equipped with a bracket (4), and the air flow generator (3) is installed in the second chamber (62) through the bracket (4); the gas flow channel is a single flow channel, which is annularly guided to the second chamber air inlet (6202), and a flow guiding partition (623) and a first chamber porous material (7) are arranged outside the second chamber air inlet (6202); the opening of the flow guiding partition (623) is close to the opening of the gas flow channel; the space between the flow guiding partition (623) and the gas flow channel is filled with the first chamber porous material (7); or the gas flow channel is a split flow channel, which is guided to the second chamber air inlet (6202) through the opening of the split flow channel, and a flow guiding partition (623) and a first chamber porous material (7) are arranged outside the second chamber air inlet (6202); the opening of the flow guiding partition (623) is far from the opening of the split flow channel; the first chamber porous material (7) is arranged corresponding to the opening of the flow guiding partition (623).

2. The sound-absorbing flow channel device according to claim 1, characterized in that: a sound-absorbing partition with sound-absorbing characteristics is provided on the side wall of the gas flow channel.

3. The sound-absorbing flow channel device according to claim 2, characterized in that: the sound-absorbing partition is a flat partition inclined along the gas flow direction.

4. The sound-absorbing flow channel device according to claim 2, characterized in that: the sound-absorbing partition is an arc-shaped curved surface partition bent along the gas flow direction.

5. The sound-absorbing flow channel device according to claim 2, characterized in that: the sound-absorbing partition is a U-shaped partition connected to the side walls on both sides of the gas flow channel, and the two vertical surfaces of the U-shaped partition are inclined along the gas flow direction.

6. The sound-absorbing flow channel device according to claim 1, characterized in that: the air flow generator (3) is suspended in the second chamber (62) through a flexible bracket (12) and / or a second chamber porous material (11); a flow detection element (9) is installed in the air inlet on the sound-absorbing flow channel main body (6).

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