Noise reduction structure and breathing machine

Abstract

The utility model discloses a noise reduction structure which is made of flexible materials and comprises an outer wall, an inner wall, an upper wall, a lower wall and a partition wall, the upper wall, the lower wall and the partition wall are all located between the outer wall and the inner wall, the upper wall is connected to the top end of the outer wall and the top end of the inner wall, the lower wall is connected to the bottom end of the outer wall and the bottom end of the inner wall, and the partition wall is located between the inner wall and the outer wall. The partition wall is connected with at least one of the outer wall, the inner wall, the upper wall and the lower wall; the noise reduction structure comprises a first cavity, a second cavity and a penetrating channel, an opening of the first cavity faces downwards, an opening of the second cavity faces upwards, and the upper end and the lower end of the penetrating channel are open. The utility model further relates to a breathing machine. According to the utility model, the noise generated by self-vibration during the operation of the fan and the noise generated by internal airflow during the operation of the machine can be effectively reduced, and the use experience of the breathing machine is improved.

Description

Technical Field

[0001] The utility model relates to a noise reduction structure and a ventilator, belonging to the technical field of ventilators. Background Art

[0002] In modern clinical medicine, ventilators are widely used for respiratory failure caused by various causes, anesthesia and respiratory management during major surgery, respiratory support therapy, and emergency resuscitation, occupying a very important position in the field of modern medicine. Ventilators are vital medical devices that can prevent and treat respiratory failure, reduce complications, and save and prolong patients' lives.

[0003] Most existing ventilators operate by using a fan to drive the flow of gas to assist patients in breathing. However, the vibration and noise generated by existing ventilators during use are relatively large, which affects patients' use. In order to reduce vibration and noise, a noise reduction structure is usually set around the fan of the ventilator. Sponge, as an effective means to reduce vibration and noise, is usually used as a noise reduction structure of the ventilator. For example, the noise reduction device disclosed in the Chinese utility model patent with publication number CN221462608U is made of sponge material, and a second channel is provided in the noise reduction device to connect the second chamber and the third chamber. The sponge material has a good noise reduction effect, but the sponge is prone to aging after long-term use and may produce debris. The debris is inhaled into the respiratory system by the patient, which may cause health risks. Utility Model Content

[0004] In order to overcome the problems existing in the prior art, the utility model provides a noise reduction structure, which mainly overcomes the problems of the prior art while reducing the vibration and noise of the ventilator. The specific technical solution is as follows.

[0005] A noise reduction structure, characterized in that the noise reduction structure is made of a flexible material and includes an outer wall, an inner wall, an upper wall, a lower wall and a partition wall, wherein the upper wall, the lower wall and the partition wall are all located between the outer wall and the inner wall, the upper wall is connected to the top ends of the outer wall and the inner wall, the lower wall is connected to the bottom ends of the outer wall and the inner wall, and the partition wall is connected to at least one of the outer wall, the inner wall, the upper wall and the lower wall;

[0006] The noise reduction structure includes a first cavity, a second cavity and a through channel. The opening of the first cavity faces downward, the opening of the second cavity faces upward, and the through channel is open at both upper and lower ends.

[0007] Preferably, at least some of the first cavities have different cross-sectional areas, and at least some of the second cavities have different cross-sectional areas.

[0008] Preferably, at least part of the first cavity is surrounded by the upper wall, the outer wall and the partition wall; or at least part of the first cavity is surrounded by the upper wall, the outer wall and the inner wall; or at least part of the first cavity is surrounded by the upper wall, the outer wall, the inner wall and the partition wall; or at least part of the first cavity is surrounded by the upper wall, the inner wall and the partition wall; or at least part of the first cavity is surrounded by the upper wall and the partition wall.

[0009] Preferably, at least part of the second cavity is surrounded by the lower wall, the outer wall and the partition wall; or at least part of the second cavity is surrounded by the lower wall, the outer wall and the inner wall; or at least part of the second cavity is surrounded by the lower wall, the outer wall, the inner wall and the partition wall; or at least part of the second cavity is surrounded by the lower wall, the inner wall and the partition wall; or at least part of the second cavity is surrounded by the lower wall and the partition wall.

[0010] Preferably, at least part of the through-channel is surrounded by the outer wall and the partition wall; or at least part of the through-channel is surrounded by the outer wall and the inner wall; or at least part of the through-channel is surrounded by the outer wall, the inner wall and the partition wall; or at least part of the through-channel is surrounded by the inner wall and the partition wall; or at least part of the through-channel is surrounded by the partition wall.

[0011] Preferably, the outer wall, inner wall and partition wall all extend in a vertical direction; and the upper wall and lower wall all extend in a horizontal direction.

[0012] Preferably, the partition wall has at least one of a flat portion, a bent portion, and an arc portion.

[0013] Furthermore, the noise reduction structure further includes a base, the edge of which is fixedly connected to the inner surface of the inner wall. The base is used to support the ventilator's fan from below to reduce the vibration of the fan. Preferably, the edge of the base has an outer flange extending downward.

[0014] Preferably, the flexible material is at least one of silicone, TPE, TPR, polyurethane, chloroprene rubber, polypropylene, fluororubber, polysulfide rubber or nitrile rubber.

[0015] Based on the same inventive concept, the present invention also relates to a ventilator, which includes a fan housing, a fan and the above-mentioned noise reduction structure, wherein the noise reduction structure is located in the fan housing, the inner wall of the noise reduction structure forms an accommodation space, and the fan is located in the accommodation space;

[0016] An upper air duct for the fan is provided between the fan hopper shell and the upper wall, a lower air duct for the fan is provided between the fan hopper shell and the lower wall, the through channel connects the upper air duct for the fan and the lower air duct for the fan, the first cavity is connected to the lower air duct for the fan, and the second cavity is connected to the upper air duct for the fan.

[0017] The utility model can effectively reduce the noise generated by the self-vibration of the fan during operation and the noise generated by the internal airflow during operation of the machine, thereby improving the user experience of the ventilator and avoiding the safety hazards caused by the use of sponges in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a ventilator of the present utility model;

[0019] Figure 2 It is a schematic diagram of the fan silo housing;

[0020] Figure 3 This is an exploded diagram of the fan silo;

[0021] Figure 4 It is a three-dimensional schematic diagram of the noise reduction structure (top view);

[0022] Figure 5 It is a three-dimensional schematic diagram of the noise reduction structure (looking up);

[0023] Figure 6 It is a cross-sectional schematic diagram of the noise reduction structure (the cross section is a horizontal plane);

[0024] Figure 7 It is a cross-sectional schematic diagram of the noise reduction structure (the cross section is a vertical plane);

[0025] Figure 8 It is a cross-sectional diagram of the fan silo (the cross section is a vertical plane);

[0026] Figure 9 It is another cross-sectional schematic diagram of the noise reduction structure (the cross section is a horizontal plane).

[0027] In the figure: ventilator housing 1, fan compartment 2, fan compartment housing 3, upper housing 3-1, lower housing 3-2, side housing 3-3, fan 4, noise reduction structure 5, inner wall 51, outer wall 52, upper wall 53, lower wall 54, partition wall 55, flat plate portion 55-1, bent portion 55-2, arc portion 55-3, accommodating space 56, first cavity 6, second cavity 7, through channel 8, base 9, outer flange 9-1, support column 10, upper air duct 11 of fan, lower air duct 12 of fan, positioning member 13. DETAILED DESCRIPTION

[0028] The present invention is described in further detail below with reference to the accompanying drawings.

[0029] See also Figures 1-9 The utility model provides a ventilator, which includes a fan compartment 2 located in a ventilator housing 1, the fan compartment 2 includes a fan compartment housing 3, a fan 4 and a noise reduction structure 5, the noise reduction structure 5 is located in the fan compartment housing 3, the inner wall 51 of the noise reduction structure 5 encloses an accommodating space 56, and the fan 4 is located in the accommodating space 56.

[0030] The noise reduction structure 5 is made of a flexible material, and can be made of one of silicone, TPE, TPR, polyurethane, neoprene, polypropylene, fluororubber, polysulfide rubber or nitrile rubber. Silicone is most preferred. The silicone material has a significant damping effect on noise and can effectively absorb and isolate sound waves to achieve the effect of reducing noise. In addition, silicone dissipates mechanical energy into heat energy through its unique dynamic mechanical relaxation properties and hysteresis phenomenon, thereby reducing mechanical noise and alleviating mechanical vibration. Silicone has good anti-aging properties relative to sponge, can be used stably for a long time, and is not easily affected by harsh environments. Even if the silicone material ages, it will not produce debris and will not be inhaled into the human body to cause health risks. The material hardness of the noise reduction structure 5 is best between 25A and 45A.

[0031] like Figure 4-Figure 9 As shown, the noise reduction structure 5 includes an inner wall 51, an outer wall 52, an upper wall 53, a lower wall 54 and a partition wall 55. The upper wall 53, the lower wall 54 and the partition wall 55 are all located between the outer wall 52 and the inner wall 51. The upper wall 53 is connected to the top ends of the outer wall 52 and the inner wall 51, the lower wall 54 is connected to the bottom ends of the outer wall 52 and the inner wall 51, and the partition wall 55 is connected to at least one of the outer wall 52, the inner wall 51, the upper wall 53 and the lower wall 54 (from Figure 6Observe that all partition walls 55 are connected to the outer wall 52 and / or the inner wall 51, but those skilled in the art will appreciate that the partition walls 55 may also be connected only to the upper wall 53 and / or the lower wall 54. The inner wall 51, outer wall 52, upper wall 53, lower wall 54, and partition walls 55 together divide the noise reduction structure 5 into several cavity structures, including a first cavity 6, a second cavity 7, and a through-channel 8. The first cavity 6 opens downward, the second cavity 7 opens upward, and the through-channel 8 is open at both ends. Preferably, the outer wall 52, inner wall 51, and partition walls 55 all extend vertically; the upper wall 53 and lower wall 54 both extend horizontally. An upper fan air duct 11 is defined between the fan hopper housing 3 and the upper wall 53, and a lower fan air duct 12 is defined between the fan hopper housing 3 and the lower wall 54. A through-channel 8 connects the upper and lower fan air ducts 11 and 12. The first cavity 6 is connected to the lower fan air duct 12, and the second cavity 7 is connected to the upper fan air duct 11. The arrangement of the first cavity 6, the second cavity 7, and the through-channel 8, combined with the material properties of the silicone itself, allows the cavity structure to dissipate more mechanical energy, resulting in a better vibration reduction effect of the noise reduction structure 5 on the fan 4.

[0032] Among them, such as Figure 6 As shown, the partition wall 55 has at least one of a flat portion 55-1, a bent portion 55-2, and an arc portion 55-3. The partition wall 55 further increases the contact area with the sound waves, thereby increasing the noise reduction effect. The first cavity 6 and the second cavity 7 are opened downward and upward, respectively. The first cavity 6 and the second cavity 7 are also distributed as silencer chambers in the upper air duct 11 and the lower air duct 12 of the fan, thereby reducing noise and playing a role in silencer. Figure 9 As shown ( Figure 9 The wavy lines in the figure represent sound waves), and the sound waves on both sides of the partition wall 55 have different phases. Sound waves of different phases may cancel each other out, for example, the peak on the left and the trough on the right cancel each other out, thereby achieving a noise reduction effect.

[0033] like Figure 4-Figure 5 As shown, the opening of the first cavity 6 faces downward and can be formed in various ways. At least a portion of the first cavity 6 is surrounded by the upper wall 53, the outer wall 52, and the partition wall 55; or at least a portion of the first cavity 6 is surrounded by the upper wall 53, the outer wall 52, and the inner wall 51; or at least a portion of the first cavity 6 is surrounded by the upper wall 53, the outer wall 52, the inner wall 51, and the partition wall 55; or at least a portion of the first cavity 6 is surrounded by the upper wall 53, the inner wall 51, and the partition wall 55; or at least a portion of the first cavity 6 is surrounded by the upper wall 53 and the partition wall 55 (not shown). In short, the first cavity 6 is not a completely enclosed cavity structure, and the lower end of the first cavity 6 is not enclosed by the lower wall 54.

[0034] like Figure 4-Figure 5As shown, the second cavity 7 opens upward and can be formed in a variety of ways: at least a portion of the second cavity 7 is surrounded by the lower wall 54, the outer wall 52, and the partition wall 55; or at least a portion of the second cavity 7 is surrounded by the lower wall 54, the outer wall 52, and the inner wall 51; or at least a portion of the second cavity 7 is surrounded by the lower wall 54, the outer wall 52, the inner wall 51, and the partition wall 55; or at least a portion of the second cavity 7 is surrounded by the lower wall 54, the inner wall 51, and the partition wall 55; or at least a portion of the second cavity 7 is surrounded by the lower wall 54 and the partition wall 55 (not shown). In short, the second cavity 7 is not a completely enclosed cavity structure, and the upper end of the second cavity 7 is not enclosed by the upper wall 53.

[0035] like Figure 4-Figure 5 As shown, both the upper and lower ends of the through-channel 8 are open. Similar to the first cavity 6 and the second cavity 7, there are many ways to form the through-channel 8. At least part of the through-channel 8 is surrounded by the outer wall 52 and the partition wall 55 (not shown); or at least part of the through-channel 8 is surrounded by the outer wall 52 and the inner wall 51 (not shown); or at least part of the through-channel 8 is surrounded by the outer wall 52, the inner wall 51 and the partition wall 55 (not shown); or at least part of the through-channel 8 is surrounded by the inner wall 51 and the partition wall 55 (not shown); or at least part of the through-channel 8 is surrounded by the partition wall 55. In short, the through-channel 8 is not a completely closed cavity structure. The upper and lower ends of the through-channel 8 are not closed by the upper wall 53 and the lower wall 54. Among them, Figure 4-Figure 6 The through-channels 8 shown are each surrounded by a cylindrical partition wall 55 .

[0036] Preferably, at least some of the first cavities 6 have different cross-sectional areas, and at least some of the second cavities 7 have different cross-sectional areas. That is, at least some of the first cavities 6 have different widths, and at least some of the second cavities 7 have different widths. This allows for the silencing of noise of different frequencies. Thus, cavities of different shapes (different cross-sectional areas) in this embodiment can affect sound waves of multiple different wavelengths, enhancing the noise reduction effect.

[0037] Furthermore, if Figure 7As shown, the noise reduction structure 5 also includes a base 9, and the edge of the base 9 is fixedly connected to the inner surface of the inner wall 51. Preferably, a support column 10 is also provided on the lower surface of the base 9, and the support column 10 has a certain buffering effect. The base 9 is used to support the fan 4 of the ventilator from below to reduce the vibration of the fan 4. The base 9 has an air inlet (not shown) for gas to pass through, and the gas enters the fan 4 through the air inlet. Preferably, the base 9 is bowl-shaped, and the edge of the base 9 has an outer flange 9-1 extending downward. When the fan 4 is running, the impact force generated by the vibration continuously squeezes and collides with the base 9, and the impact force generated by it is absorbed and dispersed by compressing and restoring the outer flange 9-1, thereby achieving the effect of reducing vibration and noise. The thickness of the base 9 is set to be relatively thin, and the optimal limit is within the range of 0.5-2.0mm.

[0038] Furthermore, if Figure 3 As shown, the fan hopper 2 also includes a positioning member 13, which is located between the top of the fan 4 and the fan hopper housing 3. The positioning member 13 is made of silicone. The positioning member 13 and the noise reduction structure 5 completely position the fan 4 within the fan hopper housing 3, thereby improving the fan vibration and noise reduction effect.

[0039] like Figure 2-Figure 3 As shown, the fan hopper shell 3 includes an upper shell 3-1, a lower shell 3-2 and a side shell 3-3. The side shell 3-3 is connected between the upper shell 3-1 and the lower shell 3-2. During assembly, the fan 4 and the noise reduction structure 5 are first placed into the side shell 3-3 together. The support column 10 of the noise reduction structure 5 is supported on the lower shell 3-2, and a fan lower air duct 12 is formed between the lower shell 3-2 and the lower wall 54; then the upper shell 3-1 is assembled to the side shell 3-3, and a positioning member 13 is set between the upper shell 3-1 and the top of the fan 4 to provide positioning, shock absorption and noise reduction effects for the fan 4, and a fan upper air duct 11 is formed between the upper shell 3-1 and the upper wall 53.

[0040] The gas flow path when the fan 4 is working is: the external gas first enters the fan hopper shell 3, and then the flow path is: the upper air duct 11 of the fan → through the channel 8 → the lower air duct 12 of the fan → through the base 9 → fan 4, and finally the gas compressed by the fan 4 is discharged to the outside of the fan hopper shell 3.

[0041] The fan 4 (also known as the air compressor) generates a certain amount of vibration during operation. The noise reduction structure 5 can absorb the vibration generated by the fan 4 during operation. Since the noise reduction structure 5 is arranged between the fan 4 and the fan hopper shell 3, this can prevent the vibration generated by the fan 4 from being directly transmitted to the fan hopper shell 3. The fan 4 generates a certain amount of noise during operation. The noise reduction structure 5 can also absorb the noise to achieve the effect of silencing and reducing noise. When the fan 8 is operating, the airflow noise in the upper air duct 11 of the fan and the lower air duct 12 of the fan will generate a certain amount of pressure on the upper wall 53 or the lower wall 54. Because the thickness of the upper and lower walls is set relatively thin, they will deform when subjected to sound pressure. The sound pressures on the upper wall 53 or the lower wall 54 from the upper air duct 11 of the fan and the lower air duct 12 of the fan will offset each other, achieving the effect of silencing and reducing noise. Therefore, the noise reduction structure 5 can achieve the simultaneous reduction of vibration and noise, providing users with a better user experience.

[0042] The embodiments of the present invention are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other. The present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative and not restrictive. Under the guidance of the present invention, those skilled in the art can make many forms without departing from the scope of protection of the present invention and the scope of the claims, all of which fall within the scope of protection of the present invention.

Claims

1. A noise reduction structure, characterized in that: The noise reduction structure is made of a flexible material and comprises an outer wall (52), an inner wall (51), an upper wall (53), a lower wall (54) and a partition wall (55); the upper wall (53), the lower wall (54) and the partition wall (55) are all located between the outer wall (52) and the inner wall (51); the upper wall (53) is connected to the top ends of the outer wall (52) and the inner wall (51); the lower wall (54) is connected to the bottom ends of the outer wall (52) and the inner wall (51); and the partition wall (55) is connected to at least one of the outer wall (52), the inner wall (51), the upper wall (53) and the lower wall (54); The noise reduction structure comprises a first cavity (6), a second cavity (7) and a through channel (8); the opening of the first cavity (6) faces downward, the opening of the second cavity (7) faces upward, and the through channel (8) is open at both upper and lower ends.

2. A noise reduction structure according to claim 1, characterized in that: The cross-sectional areas of at least some of the first cavities (6) are different, and the cross-sectional areas of at least some of the second cavities (7) are different.

3. The noise reduction structure according to claim 1, characterized in that: At least part of the first cavity (6) is surrounded by the upper wall (53), the outer wall (52) and the partition wall (55); or at least part of the first cavity (6) is surrounded by the upper wall (53), the outer wall (52) and the inner wall (51); or at least part of the first cavity (6) is surrounded by the upper wall (53), the outer wall (52), the inner wall (51) and the partition wall (55); or at least part of the first cavity (6) is surrounded by the upper wall (53), the inner wall (51) and the partition wall (55); or at least part of the first cavity (6) is surrounded by the upper wall (53) and the partition wall (55).

4. The noise reduction structure according to claim 1, characterized in that: At least part of the second cavity (7) is surrounded by the lower wall (54), the outer wall (52) and the partition wall (55); or at least part of the second cavity (7) is surrounded by the lower wall (54), the outer wall (52) and the inner wall (51); or at least part of the second cavity (7) is surrounded by the lower wall (54), the outer wall (52), the inner wall (51) and the partition wall (55); or at least part of the second cavity (7) is surrounded by the lower wall (54), the inner wall (51) and the partition wall (55); or at least part of the second cavity (7) is surrounded by the lower wall (54) and the partition wall (55).

5. The noise reduction structure according to claim 1, characterized in that: At least part of the through-channel (8) is surrounded by the outer wall (52) and the partition wall (55); or at least part of the through-channel (8) is surrounded by the outer wall (52) and the inner wall (51); or at least part of the through-channel (8) is surrounded by the outer wall (52), the inner wall (51) and the partition wall (55); or at least part of the through-channel (8) is surrounded by the inner wall (51) and the partition wall (55); or at least part of the through-channel (8) is surrounded by the partition wall (55).

6. The noise reduction structure according to claim 1, characterized in that: The outer wall (52), the inner wall (51), and the partition wall (55) all extend in a vertical direction; and the upper wall (53) and the lower wall (54) all extend in a horizontal direction.

7. The noise reduction structure according to claim 1, characterized in that: The partition wall (55) has at least one of a flat plate portion (55-1), a bent portion (55-2), and an arc portion (55-3).

8. The noise reduction structure according to claim 1, characterized in that: The noise reduction structure further comprises a base (9), the edge of the base (9) being fixedly connected to the inner surface of the inner wall (51), and the edge of the base (9) having an outer flange (9-1) extending downward.

9. The noise reduction structure according to claim 1, characterized in that: The flexible material is at least one of silicone, TPE, TPR, polyurethane, chloroprene rubber, polypropylene, fluororubber, polysulfide rubber or nitrile rubber.

10. A ventilator, characterized in that: It comprises a fan hopper housing (3), a fan (4) and a noise reduction structure according to any one of claims 1 to 9, wherein the noise reduction structure (5) is located in the fan hopper housing (3), the inner wall (51) of the noise reduction structure (5) encloses an accommodating space (56), and the fan (4) is located in the accommodating space (56); An upper air duct (11) of the fan is provided between the fan hopper housing (3) and the upper wall (53), and a lower air duct (12) of the fan is provided between the fan hopper housing (3) and the lower wall (54). The through passage (8) connects the upper air duct (11) of the fan with the lower air duct (12). The first cavity (6) is connected to the lower air duct (12), and the second cavity (7) is connected to the upper air duct (11) of the fan.

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