CN211513004U

CN211513004U - Noise reduction structure for ventilation therapy device and ventilation therapy device

Info

Publication number: CN211513004U
Application number: CN201922453669.7U
Authority: CN
Inventors: 毕唯东; 智建鑫; 易萍虎; 庄志
Original assignee: BMC Medical Co Ltd
Current assignee: BMC Medical Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-18
Anticipated expiration: 2029-12-30

Abstract

The utility model relates to a treatment facility field of ventilating discloses a noise reduction structure and treatment facility of ventilating for ventilating treatment facility. The noise reduction structure comprises a main pipe (1) and a sleeve (2), wherein the sleeve (2) is sleeved outside the main pipe (1), two ends of the sleeve (2) are sealed on the outer wall of the main pipe (1) to form a sealed cavity (3) between the sleeve (2) and the main pipe (1), and the pipe wall of the main pipe (1) used for limiting the cavity (3) is provided with a plurality of through holes (121) which are communicated with the pipe cavity of the main pipe (1) and the cavity (3). Through the technical scheme, the utility model discloses a noise reduction structure can effectively reduce the pneumatic noise in the vent line when being applied to the treatment of ventilating equipment, improves patient's use satisfaction.

Description

Noise reduction structure for ventilation therapy device and ventilation therapy device

Technical Field

The utility model relates to a treatment equipment field of ventilating specifically relates to a treatment equipment of ventilating that is used for ventilating's noise reduction structure and includes this noise reduction structure.

Background

During the use of the ventilation treatment equipment, the centrifugal fan of the core component sucks air into the fan through negative pressure generated at the air inlet during high-speed rotation and forms high pressure inside the fan, then the generated high-pressure air is extruded out of the fan by utilizing the high-speed rotation of the fan, the air flowing out of the fan enters a ventilation pipeline at a high speed to form jet flow and generate great pneumatic noise, and the noise can be radiated to the outside of the equipment through the pipeline. However, the users of the ventilation therapy equipment are mostly patients with sleep apnea syndrome, and the large pneumatic noise makes the patients unable to use the equipment well.

Therefore, there is a need for a noise reduction structure for aerodynamic noise in a ventilation line to improve patient satisfaction.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a noise reduction structure for ventilation treatment equipment and ventilation treatment equipment comprising the same to solve the problems.

In order to achieve the above object, an aspect of the present invention provides a noise reduction structure for ventilation therapy equipment, the noise reduction structure includes a main pipe for ventilation and a sleeve pipe sleeved outside the main pipe, two ends of the sleeve pipe are sealed and connected to an outer wall of the main pipe in a sealing manner to form a cavity between the sleeve pipe and the main pipe, and the main pipe is used for limiting a plurality of through holes for communicating a pipe cavity of the main pipe with the cavity on a pipe wall of the cavity.

Optionally, the sleeve is a straight tube, and at least a portion of the main tube defining the cavity is a straight tube.

Optionally, the through hole is a circular hole, and the aperture of the through hole is 0.1mm-0.8 mm.

Optionally, the cavity is formed in a ring shape.

Optionally, the main pipe includes an air inlet pipe section, a middle pipe section, and an air outlet pipe section that are sequentially connected along an air flow direction in the main pipe, the plurality of through holes are disposed on the middle pipe section, and the air inlet pipe section and the air outlet pipe section both partially define the cavity.

Optionally, a length L1 of the portion of the inlet duct segment defining the cavity is less than a length L2 of the portion of the outlet duct segment defining the cavity.

Optionally, the length L1 is 0.2-0.25 times the length of the intermediate segment and the length L2 is 0.5-0.6 times the length of the intermediate segment.

Optionally, the middle pipe section is detachably connected to the air inlet pipe section and the air outlet pipe section, and the strength of the middle pipe section is greater than that of the air inlet pipe section and the air outlet pipe section; and/or

The through holes are uniformly arranged in rows along the axial direction of the middle pipe section, and the through holes in each row are uniformly arranged along the circumferential direction of the middle pipe section.

Optionally, the interval between adjacent through holes is 1.2mm-1.8 mm.

Optionally, the cavity is filled with a sound absorbing material.

The utility model provides a ventilation treatment equipment, ventilation treatment equipment includes the fan and above the noise reduction structure, be responsible for with the gas outlet intercommunication of fan.

Optionally, the ventilation treatment device comprises a humidifier, an air inlet of the humidifier is communicated with an air outlet of the blower, and the main pipe is communicated with an air outlet of the humidifier.

Through the technical scheme, the utility model discloses a noise reduction structure is when being applied to the treatment equipment of ventilating, the gas that flows out from the fan can enter in the main pipe, part air current that enters in the main pipe can get into the cavity through the through-hole, the air current can take place viscidity dissipation and eliminate the part high frequency noise in the air current when passing through the through-hole, the air current that gets into the cavity then can produce resonance with sheathed tube inner wall and turn into the low frequency noise in the air current into high frequency noise, this high frequency noise can eliminate partly through viscidity dissipation when the air current gets back to the main pipe through the through-hole, the surplus high frequency noise in the air current that gets back to the main pipe can take place the high frequency with other air currents in the main pipe and overlap and offset, in addition, the air current that gets back to the main pipe still can produce the disturbance to other air currents, increase the vis; therefore, the utility model discloses a noise reduction structure can effectively reduce the pneumatic noise in the vent line, improves patient's use satisfaction.

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

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a perspective view of a noise reduction structure of the present invention;

fig. 2 is an axial sectional view of the noise reducing structure of fig. 1.

Description of the reference numerals

1-main pipe, 11-air inlet pipe section, 12-middle pipe section, 121-through hole, 13-air outlet pipe section, 2-sleeve and 3-cavity.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the present invention, the terms of orientation such as "inside and outside" used in the case where no description is given to the contrary mean inside and outside with respect to the outline of each member itself.

An aspect of the utility model provides a noise reduction structure for ventilating therapy equipment, noise reduction structure is located including being responsible for 1 and the cover that is used for ventilating be responsible for 1 outer sleeve pipe 2, sleeve pipe 2 both ends seal with be responsible for 1 outer wall sealing connection with sleeve pipe 2 with be responsible for between 1 vacuole formation 3, be responsible for 1 be used for injecing the intercommunication has been seted up on the pipe wall of cavity 3 be responsible for 1 the lumen with a plurality of through-holes 121 of cavity 3.

Through the technical scheme, the noise reduction structure of the utility model can be formed into a resonance sound absorber similar to a Helmholtz resonator, when the resonance sound absorber is applied to ventilation treatment equipment, air flowing out of a fan can enter the main pipe 1, partial air flow entering the main pipe 1 can enter the cavity 3 through the through hole 121, viscous dissipation can be generated when the air flow passes through the through hole 121 to eliminate partial high-frequency noise in the air flow, the air flow entering the cavity 3 can generate resonance with the inner wall of the sleeve 2 to convert low-frequency noise in the air flow into high-frequency noise, the high-frequency noise can be partially eliminated through viscous dissipation when the air flow returns to the main pipe 1 through the through hole 121, residual high-frequency noise in the air flow returning to the main pipe 1 can be overlapped with other air flows in the main pipe 1 in a high frequency mode to offset, in addition, the air flow returning to the main pipe 1 can generate disturbance to other air flows, and viscous dissipation of other air flows when the air flows enter the cavity, thereby eliminating more high frequency noise; therefore, the utility model discloses a noise reduction structure can effectively reduce the pneumatic noise in the vent line, improves patient's use satisfaction. Additionally, the utility model discloses a noise reduction structure is through the mode that adopts the pipeline noise reduction, and the commonality is higher, and is applicable in the treatment facility of ventilating that has vent line wantonly.

In the present invention, the through hole 121 may be any shape, such as triangle, square, circle, etc. Preferably, the through hole 121 is a circular hole, and the diameter of the through hole 121 is 0.1mm to 0.8 mm. The through-hole 121 in the present invention is a micro-hole having a small diameter. From calculation of the noise-damping frequency band

Wherein: f. of₀For the central frequency of the centrifugal fan, B is the width of the noise elimination spectrum, and d is the aperture of the through hole, it can be known that the smaller the aperture of the through hole 121 is, the larger the width of the noise elimination spectrum is. Therefore, the aperture of the through-hole 121 should be as small as possible. However, due to the limitation of practical production process, the aperture of the through-hole 121 cannot be setThe hole diameter of the through hole 121 can reach 0.3mm-0.5mm on the basis of ensuring the yield through laser drilling or chemical etching.

In the utility model, the main pipe 1 and the sleeve 2 can have any cross section shape, and the main pipe 1 and the sleeve 2 can be bent pipes or straight pipes. In order to further improve the noise reduction effect, the cross sections of the main pipe 1 and the sleeve 2 are preferably circular, the sleeve 2 is preferably a straight pipe, and at least the part of the main pipe 1 for defining the cavity 3 is a straight pipe, as shown in fig. 1 and 2. The cavity 3 may have any shape, and is preferably annular in order to further enhance the noise reduction effect.

The utility model discloses in, be responsible for 1 and can be integrated into one piece's pipe fitting, also can be the pipe fitting that forms by the multistage union coupling. Wherein, according to an embodiment of the present invention, as shown in fig. 2, the main pipe 1 may include an air inlet pipe section 11, an intermediate pipe section 12 and an air outlet pipe section 13, which are sequentially connected along an air flow direction in the main pipe 1 (refer to a direction from right to left of the main pipe 1 in fig. 2), the plurality of through holes 121 are disposed on the intermediate pipe section 12, and the air inlet pipe section 11 and the air outlet pipe section 13 both partially define the cavity 3. That is, the middle pipe section 12 having the plurality of through holes 121 is located at the middle position of the cavity 3, which enables the air flow in the main pipe 1 to smoothly establish circulation between the lumen of the main pipe 1 and the cavity 3 through the through holes 121, improving the noise reduction effect while avoiding the generation of secondary noise.

In order to further improve the noise reduction effect, it is preferable that a length L1 of the portion of the inlet pipe section 11 defining the cavity 3 is smaller than a length L2 of the portion of the outlet pipe section 13 defining the cavity 3, as shown in fig. 2. Because the portion of outlet pipe section 13 gives the fluid sufficient space for it to develop. Specifically, the gas enters the cavity 3 for circulation and returns to the main pipe 1 through the through hole 121, the returned gas flow is a secondary flow, and the secondary flow disturbs the gas flow originally circulating in the main pipe 1, so as to form a new gas flow; however, due to disturbance of the secondary flow, the new air flow is unstable, and the corresponding length L2 of the outlet pipe section 13 is set to be longer than the corresponding length L1 of the inlet pipe section 11, so that the new air flow can be fully developed, and noise can be reduced. Further preferably, the length L1 is 0.2-0.25 times the length of the middle tube section 12, and the length L2 is 0.5-0.6 times the length of the middle tube section 12.

In the present invention, the middle pipe section 12 is preferably detachably connected (for example, by using a pipe wrench) to the inlet pipe section 11 and the outlet pipe section 13, so that the middle pipe section 12 can be easily replaced. In addition, the strength of the middle pipe section 12 is preferably greater than the strength of the inlet pipe section 11 and the outlet pipe section 13, because the middle pipe section 12 needs to be provided with a plurality of through holes 121, and if the strength of the middle pipe section 12 is low, on one hand, the middle pipe section is easily damaged due to too many through holes, and on the other hand, the middle pipe section is easily vibrated due to airflow disturbance, so that secondary noise is generated. Specifically, the intermediate pipe section 12 may be made of sheet metal, and the inlet pipe section 11 and the outlet pipe section 13 may be made of plastic.

In the present invention, the plurality of through holes 121 may be arranged at intervals in any manner on the pipe wall of the middle pipe section 12. In order to further improve the noise reduction effect of the noise reduction structure, it is preferable that, as shown in fig. 2, the through holes 121 are uniformly arranged in a row in the axial direction of the middle pipe section 12, and the through holes 121 in each row are uniformly arranged in the circumferential direction of the middle pipe section 12.

In order to ensure the strength of the main pipe 1, the through holes 121 in the main pipe 1 cannot be too dense, and if the through holes are too dense, the pipe wall of the middle pipe section 12 is easily disturbed by air to generate vibration, so that secondary noise is generated. Therefore, the interval between the adjacent through holes 121 is preferably 1.2mm to 1.8 mm. The strength may refer to the stiffness of the tube wall.

The utility model discloses in, in order to further improve noise reduction effect, still can pack sound absorbing material in the cavity 3. The sound absorbing material allows faster dissipation of the noise changing from low frequency to high frequency within the cavity 3. The sound absorption material can be made of porous medium materials with light weight and large porosity, so that the aggravation of the whole structure can be avoided, and the noise elimination effect can be improved.

The utility model discloses another aspect provides a treatment facility of ventilating, treatment facility of ventilating includes the fan and above the noise reduction structure, be responsible for 1 with the gas outlet intercommunication of fan.

In a ventilation therapy device, a blower is usually installed in a main body of the ventilation therapy device, and an air outlet of the blower is communicated with a use end (such as a breathing mask) of a patient through a ventilation pipeline. Therefore, the main pipe 1 of the noise reduction structure may be connected between the air outlet of the blower and the ventilation duct, or may be formed as a part of the ventilation duct close to the blower.

In addition, some ventilation treatment equipment also comprises a humidifier, wherein the air inlet of the humidifier is communicated with the air outlet of the fan, and the air outlet of the humidifier is communicated with the breathing mask through a ventilation pipeline. In this ventilation therapy device, the main tube 1 may be connected between the outlet port of the humidifier and the ventilation line, or may be formed as a part of the ventilation line near the humidifier.

In the utility model, the ventilation therapy equipment can be a breathing machine, an oxygen therapy instrument and the like.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. The noise reduction structure for the ventilation treatment equipment is characterized by comprising a main pipe (1) for ventilation and a sleeve pipe (2) sleeved outside the main pipe (1), wherein two ends of the sleeve pipe (2) are sealed and connected with the outer wall of the main pipe (1) in a sealing mode to form a cavity (3) between the sleeve pipe (2) and the main pipe (1), and a plurality of through holes (121) for communicating a pipe cavity of the main pipe (1) with the cavity (3) are formed in the pipe wall of the main pipe (1) for limiting the cavity (3).

2. A noise-reducing structure according to claim 1, wherein the sleeve (2) is a straight pipe, and at least the portion of the main pipe (1) defining the cavity (3) is a straight pipe; and/or

The through hole (121) is a circular hole, and the aperture of the through hole (121) is 0.1mm-0.8 mm.

3. The noise reducing structure according to claim 1,

the cavity (3) is formed in a ring shape, and/or

The air inlet pipe is characterized in that the main pipe (1) comprises an air inlet pipe section (11), a middle pipe section (12) and an air outlet pipe section (13) which are sequentially connected along the airflow direction in the main pipe (1), the through holes (121) are formed in the middle pipe section (12), and the air inlet pipe section (11) and the air outlet pipe section (13) are partially limited to the cavity (3).

4. A noise reducing structure according to claim 3, wherein a length L1 of a portion of the inlet pipe section (11) defining the cavity (3) is smaller than a length L2 of a portion of the outlet pipe section (13) defining the cavity (3).

5. The noise reducing structure according to claim 4, wherein the length L1 is 0.2-0.25 times the length of the intermediate pipe section (12), and the length L2 is 0.5-0.6 times the length of the intermediate pipe section (12).

6. The noise reducing structure according to claim 3,

the middle pipe section (12) is detachably connected to the air inlet pipe section (11) and the air outlet pipe section (13), and the strength of the middle pipe section (12) is greater than that of the air inlet pipe section (11) and the air outlet pipe section (13); and/or

The through holes (121) are uniformly arranged in rows along the axial direction of the middle pipe section (12), and the through holes (121) in each row are uniformly arranged along the circumferential direction of the middle pipe section (12).

7. The noise reducing structure according to claim 6, wherein a spacing between adjacent ones of the through holes (121) is 1.2mm to 1.8 mm.

8. A noise-reducing structure according to any one of claims 1-7, characterized in that the cavity (3) is filled with sound-absorbing material.

9. An aeration treatment device characterized in that it comprises a blower and a noise reduction structure according to any one of claims 1 to 8, the main pipe (1) communicating with the outlet of the blower.

10. The ventilation therapy device according to claim 9, characterized in that it comprises a humidifier, the inlet of which communicates with the outlet of the blower, the main tube (1) communicating with the outlet of the humidifier.