WO2020258915A1

WO2020258915A1 - Air discharge noise reduction device and wearable apparatus

Info

Publication number: WO2020258915A1
Application number: PCT/CN2020/077992
Authority: WO
Inventors: 马学军; 万勇; 陈刚
Original assignee: 深圳市倍轻松科技股份有限公司
Priority date: 2019-06-26
Filing date: 2020-03-05
Publication date: 2020-12-30
Also published as: CN210372507U

Abstract

Disclosed are an air discharge noise reduction device and a wearable apparatus. The air discharge noise reduction device can be connected to an inflatable and deflatable device, and comprises a silencing material body (5) and at least two silencing cavities (21, 22, 23), wherein each of the silencing cavities (21, 22, 23) is filled with the silencing material body (5); in an airflow direction, the silencing cavities (21, 22, 23) are connected by means of flow guide pipes (27, 28), the most upstream silencing cavity (21) is provided with an air inlet pipe (24) capable of being connected to the inflatable and deflatable device, and the most downstream silencing cavity (23) is provided with an air discharge pipe (26) capable of discharging an airflow; and the air inlet pipe (24) is provided with a first pipe section (29) located inside the most upstream silencing cavity (21), and a plurality of silencing holes (25) are provided in a peripheral wall of the first pipe section (29) in a penetrating manner. By means of providing the silencing holes (25), the peak frequency of air discharge noise can be improved; and the higher the frequency, the shorter the wavelength, and noise with a shorter wavelength can be more easily subjected to silencing noise reduction treatment. By means of providing the plurality of silencing cavities (21, 22, 23), an airflow is subjected, when passing through the various levels of silencing cavities, to silencing noise reduction by the silencing material body, such that an air discharge sound can be effectively reduced.

Description

Exhaust noise reduction device and wearable equipment

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 26, 2019, with the application number 201920987256.4 (application name is "Exhaust Noise Reduction Device and Wearable Device"), the entire content of which is incorporated into this by reference Applying.

Technical field

This application belongs to the technical field of wearable devices, and more specifically, relates to an exhaust noise reduction device and a wearable device.

Background technique

Pneumatic health massage equipment usually includes an inflation and deflation device, which can inflate and deflate. When deflating, a very loud airflow sound is instantly generated, which brings a very bad user experience to the user. Therefore, it is necessary to provide a new device capable of silencing the vent noise.

Summary of the invention

technical problem

The purpose of this application is to provide an exhaust noise reduction device and a wearable device, including but not limited to solving the technical problem that a very loud airflow sound will be generated at the moment when a massage device is deflated.

The solution to the problem

Technical solutions

In order to solve the above technical problems, the technical solution adopted in the embodiments of the present application is to provide an exhaust noise reduction device, which can be connected with an inflating and discharging device, including a sound-absorbing material body and at least two sound-absorbing cavities, each of the sound-absorbing cavities The sound-absorbing material body is filled inside; in the direction of air flow, each of the sound-absorbing cavities is connected by a draft tube, the most upstream sound-absorbing cavity is provided with an air inlet pipe that can be connected to the inflating and discharging device, and the most downstream The muffler cavity is provided with an exhaust pipe capable of discharging airflow; the air inlet pipe has a first pipe section located inside the muffler cavity at the most upstream, and a plurality of muffler holes penetrate through the peripheral wall of the first pipe section.

In an embodiment, the axis of the draft tube is parallel to the axis of the intake tube.

In an embodiment, the sound-absorbing material body is sound-absorbing cotton.

In one embodiment, the muffler cavity has a first muffler cavity, a second muffler cavity, and a third muffler cavity arranged side by side, the air intake pipe is arranged on the upper part of the first muffler cavity, and the exhaust pipe is arranged At the upper part of the second silencing chamber, the lower part of the first silencing chamber and the lower part of the third silencing chamber are connected by a duct that crosses the lower part of the second silencing chamber, and the middle part of the third silencing chamber It is connected with the middle part of the second muffler cavity through another duct.

An embodiment of the present application also provides a wearable device, which includes a housing, an inflator installed inside the housing, and the above-mentioned exhaust noise reduction device, the inflator and exhaust device has an exhaust channel, and the exhaust The intake pipe of the air noise reduction device is connected with the exhaust passage.

The embodiment of the present application also provides a wearable device, including a housing, an inflator and a discharge device installed inside the housing, and the above-mentioned exhaust noise reduction device. The inflator and discharge device includes a solenoid valve, an air supply device, and Air-using equipment, the solenoid valve has a valve body and a valve core, the valve body has a valve cavity, an exhaust channel, an inflation channel, and an air supply channel. The valve core is movably installed in the valve cavity and can make all The charging channel is switched to alternatively communicate with an exhaust channel or an air supply channel, the air supply channel is connected to the air supply device, the air charging channel is connected to the air consumption device, and the exhaust noise reduction device The intake pipe is connected with the exhaust passage.

In one embodiment, the air supply device is an air pump, and the air consumption device is an air bag.

In one embodiment, the inner diameter of the exhaust passage is smaller than the inner diameter of the intake pipe.

The beneficial effects of the invention

Beneficial effect

The beneficial effect of the exhaust noise reduction device and wearable device provided by the embodiments of the present application is that the peak frequency of exhaust noise can be increased by providing the muffler hole, and the higher the frequency, the shorter the wavelength, and the shorter the wavelength of noise is easier to perform Noise reduction and noise reduction processing: By setting multiple silencing cavities, when the airflow passes through the silencing cavities at various levels, the sound and noise are reduced by the silencing material body, thereby effectively reducing the exhaust sound.

Brief description of the drawings

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only for the present application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

Figure 1 is a schematic cross-sectional view of an exhaust noise reduction device provided by an embodiment of the present application after being connected to a solenoid valve (the solenoid valve is closed), where the arrow direction is the airflow direction;

2 is a schematic cross-sectional view of the exhaust noise reduction device provided by an embodiment of the present application after being connected to a solenoid valve (the solenoid valve is open), where the arrow direction is the airflow direction;

3 is a schematic diagram of a three-dimensional structure of an intake pipe of an exhaust noise reduction device provided by an embodiment of the present application;

4 is a schematic cross-sectional view of an exhaust noise reduction device provided by an embodiment of the present application.

Invention embodiment

Embodiments of the invention

In order to make the purpose, technical solutions, and advantages of this application clearer, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and not used to limit the application.

It should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, and are only for ease of description, rather than indicating or It implies that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the application. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to specific circumstances . The terms "first" and "second" are only used for ease of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" means two or more than two, unless otherwise specifically defined.

As shown in Figures 1 to 4, an exhaust noise reduction device, which can be connected to the solenoid valve 1, includes a silencing material body 5 and silencing

cavities

21, 22, 23, and each

silencing chamber

21, 22, 23 is filled There is a sound-absorbing material body 5.

According to the direction of the air flow, the most upstream muffler chamber 21 is provided with an air inlet pipe 24, and the most downstream muffler chamber 23 is provided with an exhaust pipe 26. Each muffler cavity is connected by the

guide pipes

27 and 28 so that the noise reduction device has multiple stages. Silencer cavity.

One end of the intake pipe 24 is closed and the other end is open. The intake pipe 24 has a first pipe section 29 located inside the most upstream muffler chamber 21 and a second pipe section 20 located outside the most upstream muffler chamber 21. The end of the first pipe section 29 Closed, the end of the second pipe section 20 is open. The peripheral wall of the first pipe section 29 is provided with a plurality of silencing holes 25 penetrating in the radial direction of the intake pipe 24, and the intake pipe 24 communicates with the most upstream silencing chamber 21 through the silencing holes 25. The second pipe section 20 can be connected to the exhaust passage of the solenoid valve 1.

The exhaust pipe 26 communicates the most downstream muffler chamber 23 with the ambient atmosphere, so that the airflow in the muffler chamber 23 can be discharged through the exhaust tube 26. The

guide pipes

27 and 28 can allow air to pass through, and can guide the air to flow in a set direction, such as directing the air to flow in a straight line or in a circuitous manner. The draft tube can be a round tube or a through hole.

When exhausting, the solenoid valve 1 is opened, the charging channel of the solenoid valve is connected to the exhaust channel, and the compressed gas in the gas consuming device 4 enters the exhaust noise reduction device after passing through the charging channel and the exhaust channel. The compressed gas enters the multi-stage silencing chamber through the muffler hole 25 of the intake pipe 24. When the compressed gas passes through the multi-stage silencing chamber in sequence, it is silenced by the silencing material body 5 and finally discharged through the exhaust pipe 26.

As shown in FIGS. 1 to 4, an exhaust noise reduction device, which can be connected to a solenoid valve 1, includes a cavity 2 and a sound-absorbing material body 5. The inside of the cavity 2 is partitioned into a first silencing cavity 21, a second silencing cavity 23 and a third silencing cavity 22 which are independent of each other. The first silencing cavity 21, the second silencing cavity 23 and the third silencing cavity 22 are arranged side by side, and the second silencing cavity 23 is located between the first silencing cavity 21 and the third silencing cavity 22. The first silencing cavity 21, the second silencing cavity 23 and the third silencing cavity 22 are all filled with the silencing material body 5. The sound-absorbing material is like sound-absorbing cotton.

An air inlet pipe 24 is fixed on the upper part of the first muffler chamber 21. The air inlet pipe 24 has a first pipe section 29 extending inward into the first muffler cavity 21 and a second pipe section 20 extending outward from the first muffler cavity 21. The first pipe section The end of 29 is closed, and the end of the second pipe section 20 is open. The circumferential wall of the first pipe section 29 is provided with a plurality of muffler holes 25 penetrating in the radial direction of the intake pipe. The lower part of the first silencing chamber 21 and the lower part of the third silencing chamber 22 are connected by a first duct 28, which communicates with the first silencing chamber 21 and the third silencing chamber 22, and the first diversion tube 28 The tube 28 crosses the second muffler cavity 23. The middle part of the third silencing cavity 22 and the middle part of the second silencing cavity 23 are connected by a through hole as a second duct 27 which communicates with the third silencing cavity 22 and the second silencing cavity 23. An exhaust pipe 26 is fixed to the upper part of the second silencing chamber 23, which connects the second silencing chamber 23 with the ambient atmosphere, and the exhaust pipe 26 traverses the third silencing chamber 22 and extends out of the cavity 2 . By arranging the first and second guiding pipes, the airflow is made to flow around in each connected muffler cavity, so that the airflow can be fully absorbed by the muffler material body to reduce noise.

The axis of the intake pipe 24 is parallel to the axis of the first guide pipe 28, and the first guide pipe 28 is located below the intake pipe 24. The axis of the second draft tube 27 is parallel to the axis of the first draft tube 28, and the second draft tube 27

Located above the first draft tube 28. The axis of the exhaust pipe 26 is parallel to the axis of the second guide pipe 27, and the exhaust pipe 26 is located above the second guide pipe 27.

The solenoid valve 1 includes a valve body 11 and a valve core 13. The valve body 11 has a valve cavity 12, an exhaust channel 14, an inflation channel 15, and an air supply channel 17. The exhaust passage 14 is connected to the intake pipe 24 of the exhaust noise reduction device through the air pipe 6, and the inner diameter of the intake pipe 24 may be larger than the inner diameter of the exhaust passage 14. The inflation channel 15 is connected to the gas consuming device 4, the axis of the inflation channel 15 may be perpendicular to the axis of the exhaust channel 14, and the air supply channel 17 is connected to the air supply device 3. A first valve port 16 is provided between the exhaust passage 14 and the inflation passage 15, and a second valve port 18 is provided between the air supply passage 17 and the inflation passage 15. The valve core 13 is installed in the valve cavity 12 and can reciprocate between a closed position and an open position. In the closed position, the valve core 13 closes the first valve port 16 and opens the second valve port 18, disconnecting the exhaust passage 14 and the charging passage 15 and connecting the air supply passage 17 and the charging passage 15, and the air supply device 3 Able to inflate the gas-consuming equipment 4; in the open position, the valve core 13 opens the first valve port 16 and closes the second valve port 18, so that the exhaust passage 14 and the inflation passage 15 are connected, and the air supply passage 17 and the inflation passage 15 are connected When the communication is disconnected, the compressed gas in the gas consuming equipment 4 can enter the noise reduction and noise reduction device through the exhaust channel 14.

When the solenoid valve 1 is opened, the compressed gas in the gas consuming device 4 enters the exhaust noise reduction device through the exhaust passage 14 of the solenoid valve, and passes through the intake pipe 24, the first muffler chamber 21, the first guide pipe 28, and the The three silencing chambers 22, the second guide tube 27, and the second silencing chamber 23 are finally discharged through the exhaust pipe 26.

For the exhaust noise reduction device, a number of fine silencing holes are provided on the peripheral wall of the intake pipe, and the peak frequency of the exhaust noise is increased through the silencing holes. The higher the frequency, the shorter the wavelength, and the shorter the wavelength of the noise, the easier it is to silence Noise reduction processing. During the exhaust process, the airflow passes through the multi-stage silencing chamber, and the silencing chamber is filled with a silencing material body (such as sound-absorbing cotton), which can repeatedly absorb noise of different frequencies, thereby achieving a better noise reduction effect.

A wearable device includes a casing and an inflating and discharging device installed in the casing. The inflating and discharging device can receive gas input to realize inflation, and can also discharge gas through the exhaust channel. The exhaust channel of the charging and discharging device is connected with the intake pipe of the above-mentioned exhaust noise reduction device, and the exhaust noise of the charging and discharging device is silenced and noise-reduced through the exhaust noise reduction device. The wearable device can be inflated and deflated manually or automatically. The wearable device is like an existing inflatable neck pillow. The inflation and deflation device is like an airbag.

A wearable device that can be worn on the user's body parts such as the head, face, torso, and limbs, and includes a housing, an inflator and an exhaust noise reduction device installed in the housing, the inflator Including gas supply equipment, gas equipment and solenoid valves. The exhaust passage of the solenoid valve is connected with the intake pipe of the exhaust noise reduction device, the charging passage of the solenoid valve is connected with the gas consuming equipment, and the gas supply passage of the solenoid valve is connected with the gas supply equipment.

Air supply equipment such as air pumps, air consuming equipment such as airbags. Through the solenoid valve, the inflating and discharging control of the airbag is realized, and then the air pressure massage on the body parts of the user is realized.

The above are only optional embodiments of the application, and are not used to limit the application. For those skilled in the art, this application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the scope of the claims of this application.

Claims

An exhaust noise reduction device, characterized in that it can be connected to an inflating and discharging device, and includes a sound-absorbing material body and at least two sound-absorbing cavities, each of the sound-absorbing cavities is filled with the sound-absorbing material body; in the direction of air flow, Each of the muffler cavities is connected by a guide tube, the muffler cavity at the most upstream is provided with an air inlet pipe that can be connected to the inflator, and the muffler cavity at the most downstream is provided with an exhaust pipe that can discharge airflow; The air intake pipe has a first pipe section located inside the muffler cavity at the most upstream side, and a plurality of muffler holes penetrates through the peripheral wall of the first pipe section.
The exhaust noise reduction device according to claim 1, wherein the axis of the guide pipe is parallel to the axis of the intake pipe.
The exhaust noise reduction device according to claim 1, wherein the sound-absorbing material body is sound-absorbing cotton.
The exhaust noise reduction device according to claim 1, wherein the muffler cavity has a first muffler cavity, a second muffler cavity, and a third muffler cavity arranged side by side, and the air inlet pipe is arranged in the first muffler cavity. The upper part of the silencing chamber, the exhaust pipe is arranged on the upper part of the second silencing chamber, the lower part of the first silencing chamber and the lower part of the third silencing chamber pass through a diversion that crosses the lower part of the second silencing chamber The middle part of the third silencing chamber and the middle part of the second silencing chamber are connected by another duct.
A wearable device, comprising a casing and an inflator and discharging device installed inside the casing, the inflating and discharging device has an exhaust channel, and is characterized in that it further comprises the one described in any one of claims 1-4 In the exhaust noise reduction device, the intake pipe of the exhaust noise reduction device is connected to the exhaust passage.
A wearable device, comprising a casing and an inflating and discharging device installed inside the casing. The inflating and discharging device includes a solenoid valve, an air supply device, and an air consumption device. The solenoid valve has a valve body and a valve core The valve body has a valve cavity, an exhaust channel, an inflation channel, and an air supply channel. The valve core is movably installed in the valve cavity and can switch the inflation channel to an exhaust channel or an air supply channel. The gas supply channel is connected to the gas supply device, and the gas charging channel is connected to the gas consuming device, characterized in that it further comprises the exhaust noise reduction of any one of claims 1-4 Device, the intake pipe of the exhaust noise reduction device is connected with the exhaust passage.
8. The wearable device of claim 6, wherein the air supply device is an air pump, and the air consumption device is an airbag.
8. The wearable device of claim 6, wherein the inner diameter of the exhaust passage is smaller than the inner diameter of the intake pipe.