CN219816664U - Noise elimination and reduction device and atomization equipment - Google Patents

Abstract

The utility model provides a silencing and noise reducing device and atomizing equipment, wherein the atomizing equipment comprises the silencing and noise reducing device, the silencing and noise reducing device is arranged in the atomizing equipment and is positioned between two air passages, a throttling air passage is communicated with the two air passages, and the minimum cross-sectional area of the two air passages is larger than the maximum cross-sectional area of the throttling air passage. The silencing and noise reducing device is provided with a throttling air passage penetrating through the top and the bottom of the silencing and noise reducing device, the throttling air passage comprises a middle air flow passage, a capacity expansion cavity connected to the end part of the middle air flow passage and a straight-through air passage connected to one end of the capacity expansion cavity, which is far away from the middle air flow passage, and the minimum cross section area of the capacity expansion cavity is larger than that of the middle air flow passage. The noise elimination and noise reduction device of the scheme can effectively reduce the maximum airflow noise at the throttle air passage, so that a user is free from being bothered by the airflow noise, and the comfort level of the user suction experience is improved.

Description

Noise elimination and reduction device and atomization equipment

Technical Field

The utility model belongs to the technical field of electronic atomization equipment, and particularly relates to a silencing and noise reducing device and atomization equipment.

Background

In the related art, the number of structural members constituting the atomizing device is large, the shape of the air passage formed by each structural member is complicated, and the cross-sectional shape and the size of the air passage are varied variously. Factors such as non-smooth transition of the air passage, dislocation of the air passage, corners, small-aperture throttling and the like are all likely to generate airflow noise when a user sucks, and the excessive airflow noise easily influences comfort level of user experience.

Disclosure of Invention

The utility model aims to provide a silencing and noise-reducing device and atomizing equipment, which aim to reduce the maximum airflow noise in the atomizing equipment and reduce the noise influence of a user during suction, thereby improving the comfort level of the user suction experience.

In order to solve the technical problems, the utility model provides a silencing and noise reducing device, which is provided with a throttling air passage penetrating through the top and the bottom of the silencing and noise reducing device, wherein the throttling air passage comprises a middle air flow passage, a capacity expansion cavity connected to the end part of the middle air flow passage and a straight-through air passage connected to one end of the capacity expansion cavity, which is far away from the middle air flow passage, and the minimum cross section area of the capacity expansion cavity is larger than the cross section area of the middle air flow passage.

Further, the middle air flow channel is vertically or obliquely arranged, the bottom end and the top end of the middle air flow channel are both connected with the expansion cavity and the straight-through air channel, and the two straight-through air channels are respectively communicated with the bottom space and the top space of the silencing and noise reducing device.

Further, the cross-sectional area of the through air passage is larger than the cross-sectional area of the middle air flow passage, or/and the cross-sectional area of the through air passage is smaller than the cross-sectional area of the expansion cavity.

Further, the silencing and noise reducing device comprises a flow equalizing plate covering one end of the expansion cavity far away from the middle airflow channel, the straight-through air channel comprises at least two flow-through holes penetrating through the flow equalizing plate, and the sum of the cross sectional areas of the at least two flow-through holes is larger than the cross sectional area of the middle airflow channel.

Further, the expansion chamber covers the end of the intermediate gas flow passage.

Further, the expansion cavity comprises a main cavity covering the end part of the middle air flow channel and extending outwards in the radial direction and a secondary cavity connected with the main cavity and extending in the axial direction.

Further, the secondary cavities at least partially overlap in a radial direction of the intermediate gas flow channel.

Further, the auxiliary cavity is annular and surrounds the outer side of the middle airflow channel; or,

the auxiliary cavity comprises at least two sub-cavities which are arranged around the outer side of the middle airflow channel at intervals.

Further, one end cover of the through air channel far away from the expansion cavity is provided with a flow equalizing cover, a flow equalizing cavity is formed in the flow equalizing cover, and at least two flow equalizing holes are formed in the flow equalizing cover.

Further, the sum of the cross-sectional areas of the at least two flow equalization holes is greater than the cross-sectional area of the intermediate gas flow passage.

Further, the flow equalizing cover comprises a side wall surrounding the outside of the straight-through air passage and an end cover covering one end, far away from the straight-through air passage, of the side wall, and the flow equalizing holes are formed in the side wall.

Further, each flow equalizing hole is equidistantly and alternately arranged around the side wall, and each flow equalizing hole is equidistantly and alternately arranged along the axial direction of the side wall.

Further, the cross-sectional shape of the intermediate gas flow passage is the same as the cross-sectional shape of the expansion chamber.

Further, the cross section shape of the expansion cavity is a central symmetrical pattern and an axial symmetrical pattern.

Further, the cross section shape of the expansion cavity comprises any one of a circle, an ellipse and a regular polygon.

Further, the silencing and noise reducing device comprises a throttling parent body and a silencing and noise reducing piece embedded in the throttling parent body; wherein,,

the middle air flow channel, the expansion cavity and the straight-through air passage are all formed in the silencing noise reduction piece; or the middle airflow channel is formed in the silencing noise reduction piece, the capacity expansion cavity is formed by encircling the silencing noise reduction piece and the throttling parent body, and the straight-through air channel is formed in the throttling parent body.

Further, there is provided an atomization device, including any one of the above, the atomization device has two air passages inside, the noise-reducing device is disposed in the atomization device and between the two air passages, the throttle air passage communicates the two air passages, and the minimum cross-sectional area of the two air passages is larger than the maximum cross-sectional area of the throttle air passage.

Compared with the prior art, the silencing and noise reducing device and the atomizing equipment have the beneficial effects that:

the noise elimination noise reduction device can be arranged between two air passages of atomization equipment, the two air passages are communicated through a throttling air passage, the two air passages can be respectively an air inlet passage and an atomization passage, the throttling air passage comprises a middle air flow passage, a capacity expansion cavity connected to the end part of the middle air flow passage and a straight-through air passage connected to one end of the capacity expansion cavity, which is far away from the middle air flow passage, the minimum cross-sectional area of the capacity expansion cavity is larger than that of the middle air flow passage, so that air flow sound waves generated by the middle air flow passage directly enter the capacity expansion cavity in the process of sucking by a user, the sound waves are reflected in the capacity expansion cavity and interfere with air flow sound waves at a sound source to reduce noise, the maximum air flow noise at the throttling air passage can be effectively reduced, the user is prevented from being bothered by air flow noise, and the comfort level of the user sucking experience is improved.

Drawings

FIG. 1 is a schematic view showing a sectional structure of a atomizing apparatus according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of the atomizing apparatus of the present utility model at section A of FIG. 1 utilizing a first implementation of the muffling noise reducer;

FIG. 3 is a bottom view (left) and cross-sectional view (right) of a sound damping and noise reduction member employing a first implementation in an embodiment of the present utility model;

FIG. 4 is a top view (up) and cross-sectional view (down) of a sound damping and noise reduction member employing a second implementation in an embodiment of the present utility model;

FIG. 5 is an enlarged view of the atomizing apparatus of the present utility model employing a third implementation of the muffling noise reducer at section A of FIG. 1;

FIG. 6 is a bottom view (left) and cross-sectional view (right) of a sound damping and noise reduction member employing a third implementation in an embodiment of the present utility model;

FIG. 7 is an enlarged view of the atomizing apparatus of the present utility model employing a fourth implementation of the muffling noise reducer at section A of FIG. 1;

FIG. 8 is an enlarged view of the atomizing apparatus of the present utility model employing a fifth implementation of the muffling noise reducer at section A of FIG. 1;

fig. 9 is a top (down) view and a cross-sectional view (right) of a sound damping and noise reduction member employing fourth and fifth implementations in an embodiment of the present utility model.

In the drawings, each reference numeral denotes: 100. an atomizing device; 10. a noise elimination and reduction device; 20. an air intake passage; 30. an atomizing passage; 1. throttling the parent body; 2. a sound-deadening and noise-reducing member; 21. an intermediate gas flow channel; 22. a capacity expansion cavity; 23. a straight-through air passage; 221. a main cavity; 222. an auxiliary cavity; 3. a flow equalizing plate; 4. a flow equalizing cover; 41. a sidewall; 42. an end cap.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The inventor obtains through a large number of practice and simulation experiments: the maximum airflow noise of the air passage of the whole atomization device is in the area of and nearby the air passage throttling passage (the passage with the smallest cross-sectional area in the air passage of the atomization device), and the main reasons are that the air passage is small in size, the flow speed of the narrow throttling passage is greatly increased when a user sucks and experiences, the turbulence, the vortex strength and the pulsation strength and the frequency of the air passage pressure are also increased nearby the air passage, and the high-speed air flow rubs with the inner wall of the air passage to generate noise due to the viscosity of the air. And one realistic scenario is: the product research and development engineers or designers only pay attention to the size of the flow-through area of the throttling channel which affects the flow, and generally adopt a constant-section straight-through design, but neglect the noise elimination and noise reduction design of the air inlet and the air outlet of the throttling channel. Therefore, the utility model provides structural improvement at the throttle passage, thereby realizing good noise elimination and reduction effects on the atomization equipment.

In this embodiment, in conjunction with fig. 1-9, an atomization apparatus 100 is provided, which includes a noise-reducing and noise-reducing device 10, wherein two air passages are provided in the atomization apparatus 100, the noise-reducing and noise-reducing device 10 is disposed in the atomization apparatus 100 and between the two air passages, the throttling air passage is communicated with the two air passages, and the minimum cross-sectional area of the two air passages is larger than the maximum cross-sectional area of the throttling air passage.

The noise elimination and reduction device 10 is provided with a throttling air passage penetrating through the top and the bottom of the noise elimination and reduction device, the throttling air passage comprises a middle air flow passage 21, an expansion cavity 22 connected to the end part of the middle air flow passage 21, and a straight-through air passage 23 connected to one end of the expansion cavity 22, which is far away from the middle air flow passage 21, wherein the minimum cross-sectional area of the expansion cavity 22 is larger than the cross-sectional area of the middle air flow passage 21.

The noise elimination and noise reduction device 10 can be arranged between two air passages of the atomization device 100, the two air passages are communicated through a throttling air passage, the two air passages can be respectively an air inlet passage 20 and an atomization passage 30, and as the throttling air passage comprises a middle air flow passage 21, an expansion cavity 22 connected to the end part of the middle air flow passage 21 and a straight-through air passage 23 connected to one end of the expansion cavity 22, which is far away from the middle air flow passage 21, the minimum cross-sectional area of the expansion cavity 22 is larger than that of the middle air flow passage 21, so that in the sucking process of a user, air flow sound waves generated in the middle air flow passage 21 directly enter the expansion cavity 22, the sound waves are reflected in the expansion cavity 22 and interfere with air flow sound waves at a sound source to reduce noise, and the maximum air flow noise at the throttling air passage can be effectively reduced, thereby the user is prevented from being bothered by air flow noise, and the comfort level of the sucking experience of the user is improved.

Further, the expansion ratio of the throttle airway is greater than or equal to 5, the expansion ratio being the ratio of the cross-sectional area of the throttle airway at the expansion chamber 22 to the cross-sectional area at the intermediate gas flow passage 21. The expansion ratio of the throttling air passage can be set between 5 and 10, and the noise elimination and noise reduction effects are optimal.

Further, the height of the expansion cavity 22 is an odd number times of 1/4 of the wavelength of the airflow sound wave, and the height of the expansion cavity 22, that is, the distance between the highest point of the top wall and the lowest point of the bottom wall of the expansion cavity 22 in the vertical direction, achieves a good noise reduction effect by adopting the arrangement mode.

Further, with reference to fig. 2, 3, 5, 7, 8, the noise-reducing device 10 includes a throttle body 1 and a noise-reducing member 2 embedded in the throttle body 1; wherein, the middle air flow channel 21, the expansion cavity 22 and the through air passage 23 are all formed in the silencing noise reduction piece 2. Specifically, the bottom side or the top side of the throttling parent body 1 can be provided with an assembly groove and a through hole communicated with the assembly groove, the silencing and noise reducing piece 2 is embedded in the assembly groove, the middle part of the silencing and noise reducing piece 2 is provided with a middle airflow channel 21 and a capacity expansion cavity 22 communicated with one end of the middle airflow channel 21, the end part of the silencing and noise reducing piece 2 is provided with a straight-through air passage 23 communicated with the capacity expansion cavity 22, and the shape and the size of the straight-through air passage 23 can be the same as the through hole, so that the straight-through air passage 23 and the through hole are aligned after the silencing and noise reducing piece 2 is installed in the assembly groove. So set up, the wholeness of throttle air flue is better, and size and position are more accurate to convenient and fast during the installation.

In some embodiments, referring to fig. 4, the middle air flow channel 21 may be formed in the noise-reducing and noise-reducing member 2, the expansion cavity 22 may be formed by enclosing the noise-reducing and noise-reducing member 2 and the throttling parent 1, and the through air passage 23 may be formed in the throttling parent 1. Specifically, the bottom side or the top side of the throttling parent body 1 can be provided with an assembly groove and a through air passage 23 communicated with the assembly groove, the silencing and noise reducing piece 2 is embedded in the assembly groove and fixed with the throttling parent body 1, the middle air flow passage 21 is arranged in the silencing and noise reducing piece 2 and penetrates through the bottom and the top of the silencing and noise reducing piece, and a space is reserved between the end part of the silencing and noise reducing piece 2 and the bottom of the assembly groove, so that the end face of the silencing and noise reducing piece 2 and the assembly groove are enclosed to form an expansion cavity 22, and the expansion cavity 22 is communicated with the through passage. So set up, only need set up middle air current passageway 21 on noise elimination noise reduction spare 2 when processing noise elimination noise reduction spare 2, noise elimination noise reduction spare 2's processing convenient and fast to material cost is low, and noise elimination noise reduction spare 2 installs the process in the assembly groove simply, has greatly simplified processing and installation, and the cost is lower.

It should be understood that the specific structural composition of the mentioned atomizing apparatus 100 is not limited as long as the atomizing apparatus 100 has the air intake passage 20 and the atomizing passage 30 therein, and the throttle body 1 may be any component or part of any component in the atomizing apparatus 100 as long as it is disposed between the air intake passage 20 and the atomizing passage 30 such that both ends of the throttle air passage communicate with the air intake passage 20 and the atomizing passage 30, respectively. In other embodiments, the noise reducing liner may be located elsewhere, so long as it is between the passages through which the two gases flow, so the throttle body 1 may be a separate component embedded within the atomizing device 100, or a base of the atomizer in the atomizing device 100, or a portion of the battery stem of the atomizing device 100.

Further, the middle air flow channel 21 is vertically or obliquely arranged, the bottom end and the top end of the middle air flow channel 21 are connected with a volume expansion cavity 22 and an air passage 23, and the two air passages 23 are respectively communicated with the bottom space and the top space of the noise elimination and reduction device 10. Specifically, in this embodiment, the middle airflow channel 21 is vertically disposed, that is, the axial direction of the middle airflow channel 21 is parallel to the axial direction of the atomizing apparatus 100, both ends of the middle airflow channel 21 are connected with the expansion cavity 22, so, during the suction process, the airflow flows into or out of the expansion cavity 22 before flowing into or out of the middle airflow channel 21, the airflow can be mixed and buffered in the expansion cavity 22, so, the airflow flowing into the middle airflow channel 21 has more uniform flow velocity everywhere, the noise can be reduced, on the other hand, the noise generated when the airflow flows through the middle airflow channel 21 enters the expansion cavity 22 at both ends, the sound wave is reflected in the expansion cavities 22 at both ends and interferes with the airflow sound wave at the sound source to reduce the noise, the noise is not easy to be transmitted out of the throttling channel, and the noise elimination and noise reduction effects are better. In some embodiments, the expansion chamber 22 may be disposed only at the bottom end or the bottom end of the middle airflow channel 21, so that the noise reduction effect of the throttling air channel may be achieved, but the noise reduction effect is slightly worse than that of the manner in which the expansion chamber 22 is disposed at both ends of the middle airflow channel 21. In some embodiments, the intermediate gas flow channel 21 may also be inclined, which may be at an angle of 45-90 °.

Further, the cross-sectional area of the through air passage 23 is larger than the cross-sectional area of the intermediate air flow passage 21; the cross-sectional area of the through air passage 23 is smaller than the cross-sectional area of the expansion chamber 22. Specifically, in the axial direction of the intermediate airflow channel 21, the projection of the through air channel 23 covers the intermediate airflow channel 21, so that in the process of flowing into the through air channel 23, the airflow which is aligned to the intermediate airflow channel 21 can directly enter the intermediate airflow channel 21, the noise is smoother, the noise is not easy to generate, the turbulent airflow is easier to enter the expansion cavity 22 from the edge of the through air channel 23 to realize rectification, and the noise generated by the turbulence can be reflected and interfered in the expansion cavity 22 to consume energy; in the process that the air flow flows out of the straight-through air passage 23 from the middle air flow passage 21, the air flow which is axially in the same direction as the middle air flow passage 21 flows out of the straight-through air passage 23 more easily, the air flow is not blocked easily, noise is not easily generated easily, the air flow which is axially in the same direction as the middle air flow passage 21 flows into the expansion cavity 22 more easily to realize rectification, and the generated noise is reflected and interfered in the expansion cavity 22 to consume energy. Through implementation of the scheme, on one hand, rectification of air flow can be realized, noise is reduced, and on the other hand, noise reduction can be realized through the energy of noise consumed by the expansion cavity 22, and the noise elimination and noise reduction effect is good.

Further, the ratio between the cross-sectional area of the through air passage 23 and the cross-sectional area of the intermediate air flow passage 21 may be 1.3-1.7, such as 1.4, 1.5, 1.6, etc., and the ratio between the cross-sectional area of the through air passage 23 and the cross-sectional area of the expansion chamber 22 may be 0.3-0.6, such as 0.4, 0.5, etc. The through air passage 23, the middle air flow passage 21 and the expansion cavity 22 can realize better noise elimination and noise reduction effects by adopting the cross-sectional area setting scheme.

Further, the end edge of the through air passage 23 at the air inlet and the end edge of the through air passage 23 at the air outlet may be provided with a chamfer, preferably a round chamfer, so that the arrangement can make the air flow more smooth when flowing into or out of the throttling air passage, the turbulence is not easy to generate, and the noise can be reduced.

In some embodiments, referring to fig. 5 and 6, the muffling noise reduction apparatus 10 includes a flow equalizing plate 3 covering an end of the expansion chamber 22 remote from the intermediate gas flow passage 21, and the through-gas passage 23 includes at least two through-flow holes penetrating the flow equalizing plate 3, and a sum of cross-sectional areas of the at least two through-flow holes is larger than a cross-sectional area of the intermediate gas flow passage 21. Specifically, in this embodiment, the through air duct 23 may include one through-flow hole formed in the center of the flow equalizing plate 3 and four through-flow holes surrounding the center of the flow equalizing plate 3, and the sum of the cross-sectional areas of the five through-flow holes is larger than the sum of the cross-sectional areas of the intermediate air flow passages 21, and the projections of the five through-flow holes are located at least partially outside the intermediate air flow passages 21 in the axial direction of the intermediate air flow passages 21. Through setting up the form of through air flue 23 into a plurality of overflow holes, can make the air current flow into throttle air flue or flow out the in-process of throttle air flue, the air current velocity of flow is more alleviateed and stable, and the noise is difficult to produce yet, and through the form of setting up of overflow hole, the noise of throttle air flue inside is difficult to pass outside, has better noise isolation's effect. It should be understood that the number and arrangement form of the overflow holes are not limited, and only need to be balanced; the shapes of the overflow holes can also be adaptively arranged, and the shapes of the overflow holes can be identical or at least two different, and the shape of the overflow holes is preferably circular, and of course, the shape of the overflow holes can also be square, rectangular, regular pentagon, regular hexagon and the like.

Further, the expansion chamber 22 covers the end of the intermediate gas flow passage 21. Specifically, the extending direction of the middle airflow channel 21 passes through the expansion cavity 22, so that the airflow flowing into the middle airflow channel 21 and the airflow flowing out of the middle airflow channel 21 both enter the expansion cavity 22 and are not blocked, turbulence is not easy to generate, and in addition, the turbulence is easier to diffuse into the inner cavity of the expansion cavity 22 to realize buffering and rectification.

Further, with reference to fig. 2, 3 and 9, the expansion chamber 22 includes a main chamber 221 covering the end of the intermediate gas flow passage 21 and extending radially outwards, and a sub chamber 222 connected to the main chamber 221 and extending axially; the sub-chambers 222 at least partially overlap in the radial direction of the intermediate gas flow passage 21. The turbulent flow of the air flow and noise can pass through the main cavity 221 and propagate into the auxiliary cavity 222, so that more reflection and interference are realized, and the noise elimination and reduction effect is better; in addition, since the auxiliary cavity 222 at least partially overlaps in the radial direction of the intermediate gas flow channel 21, that is, the intermediate gas flow channel 21 and the auxiliary cavity 222 may share a part of the cavity wall, and the intermediate gas flow channel 21 and the auxiliary cavity 222 are respectively located at two sides of the cavity wall, the gas in the intermediate gas flow channel 21 and the gas in the auxiliary cavity 222 may be consumed through the cavity wall when vibrating, so that the noise-reducing and noise-reducing effects are further improved. The expansion cavity 22 is equivalent to a sound-proof cover and covers the two ends of the middle air flow channel 21, so that noise can be reduced from the middle air flow channel 21, and the suction experience of a user is improved.

In some embodiments, referring to fig. 5 and 6, the expansion chamber 22 may also include only the main chamber 221, and the main chamber 221 may be cylindrical or polygonal, and the expansion chamber 22 may also be a chamber of another shape, so long as the cross-sectional area of the expansion chamber 22 is ensured to be larger than the cross-sectional area of the middle air flow channel 21.

Further, the auxiliary cavity 222 is annular and surrounds the outer side of the middle airflow channel 21; alternatively, the sub-chamber 222 includes at least two sub-chambers disposed around the outside of the middle air flow path 21 at intervals. In this embodiment, the auxiliary cavity 222 is a complete ring and surrounds the outer side of the middle airflow channel 21, wherein the cross-sectional outer contours of the middle airflow channel 21, the expansion cavity 22 and the through air channel 23 are all circular, so that the processing is facilitated, and the effects of noise elimination, noise reduction and rectification are more balanced in the circumferential direction. In some embodiments, the auxiliary cavity 222 may also include two, three, four, etc. sub-cavities disposed around the outer side of the middle air flow channel 21 at intervals, and each sub-cavity is disposed around the middle air flow channel 21 at equal angular intervals; preferably, the number of the sub-cavities is even, and each sub-cavity is symmetrically arranged, so that the noise is easier to consume the vibration mechanical energy when driving the air to vibrate in the process of propagating in the capacity-expanding cavity 22, thereby achieving better noise elimination and noise reduction effects.

Further, the cross-sectional shape of the expansion chamber 22 is both a center symmetrical pattern and an axis symmetrical pattern. The arrangement can be more favorable for noise to drive the air in the expansion cavity 22 to vibrate so as to consume mechanical energy, and achieve better noise elimination and noise reduction effects.

It should be understood that the cross-sectional outer contour shapes of the intermediate gas flow passage 21, the expansion chamber 22 and the through-air passage 23 are all the same or at least two different, and that the shapes thereof may be adjusted accordingly, for example, a circle, an ellipse, a regular polygon, or the like may be selected from the following shapes.

Further, in order to further improve the noise elimination and noise reduction effect, in combination with fig. 7-9, a flow equalization cover 4 is arranged at one end of the through air channel 23 far away from the expansion cavity 22, a flow equalization cavity is formed in the flow equalization cover 4, and at least two flow equalization holes are formed in the flow equalization cover 4; the sum of the cross-sectional areas of the respective flow equalizing holes on the flow equalizing cover 4 is larger than the cross-sectional area of the intermediate gas flow passage 21. Specifically, the flow equalizing cover 4 includes a side wall 41 surrounding the outside of the through air passage 23 and an end cover 42 covering one end, far away from the through air passage 23, of the side wall 41, and flow equalizing holes are all formed in the side wall 41, wherein the cross section shape of the side wall 41 is identical to the shape of the through air passage 23, the inner wall surface of the flow equalizing cavity is flush with the inner wall surface of the through air passage 23, all flow equalizing holes surround the side wall 41 at equal intervals, all flow equalizing holes are arrayed at equal intervals along the axial direction of the side wall 41, and all flow equalizing holes are identical in shape and size. Thus, when the flow equalizing cover 4 is arranged at the inflow end of the throttling air passage, air flows into the flow equalizing cavity through the plurality of flow equalizing holes, and as the flow equalizing holes are uniformly arranged on the side wall 41 and the size of each flow equalizing hole is smaller, the air flow entering from the flow equalizing holes is smaller, the air flow is more regular and stable, the mixing is easy to realize in the flow equalizing cavity, the mixed air flow is more balanced, the turbulence is less, the generation of noise can be further reduced, in addition, the reflection and isolation of the noise can be realized in the flow equalizing cavity, and the noise elimination and noise reduction effects are better; when the flow equalizing cover 4 is arranged at the outflow end of the throttling air passage, air flows out of the plurality of flow equalizing holes, the flowing air flows realize a plurality of flow equalizing holes, the flow of each flow equalizing hole is small and regular, turbulence generated when the air flows out can be effectively reduced, noise is not easy to generate, and the same flow equalizing cavity can be used for mixing and buffering the air flowing out of the corresponding straight-through air passage 23 and reflecting and isolating the noise, so that the noise elimination and noise reduction effect is better.

It should be understood that the flow equalizing cover 4 may be arranged outside the straight-through air passage 23 at the top end only, or the flow equalizing cover 4 may be arranged outside the straight-through air passage at the bottom end only; in addition, the flow equalizing covers 4 can be arranged outside the direct current air passages at the top end and the bottom end respectively, and the silencing and noise reducing effect of the silencing and noise reducing device 10 is better than that of the flow equalizing cover 4 arranged at one end only under the condition that the flow equalizing covers 4 are arranged at the two ends of the throttling air passage.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (14)

1. The silencing and noise reducing device is characterized by comprising a throttling air passage penetrating through the top and the bottom of the silencing and noise reducing device, wherein the throttling air passage comprises a middle air flow passage, an expansion cavity connected to the end part of the middle air flow passage and a straight-through air passage connected to one end of the expansion cavity, which is far away from the middle air flow passage, and the minimum cross section area of the expansion cavity is larger than that of the middle air flow passage.

2. The noise elimination and noise reduction device according to claim 1, wherein the middle air flow channel is arranged vertically or obliquely, the bottom end and the top end of the middle air flow channel are connected with the expansion cavity and the through air channel, and the two through air channels are respectively communicated with the bottom space and the top space of the noise elimination and noise reduction device.

3. The muffling noise reducer of claim 1, wherein the cross-sectional area of the through air passage is greater than the cross-sectional area of the intermediate air flow passage; or/and the cross section area of the through air passage is smaller than the cross section area of the dilatation cavity.

4. The muffling noise reducer of claim 1, comprising a flow equalizing plate covering an end of the expansion chamber remote from the intermediate gas flow passage, the through gas passage comprising at least two flow-through apertures therethrough, the sum of the cross-sectional areas of the at least two flow-through apertures being greater than the cross-sectional area of the intermediate gas flow passage.

5. The muffling noise reducer of claim 1, wherein the expansion chamber includes a main chamber that covers an end of the intermediate gas flow passage and extends radially outward, and a secondary chamber that is connected to the main chamber and extends axially.

6. The muffling noise reduction device of claim 5, wherein the secondary chamber at least partially overlaps in a radial direction of the intermediate gas flow passage.

7. The muffling and noise reducing device of claim 5, wherein the secondary chamber is annular and surrounds the outside of the intermediate gas flow channel; or,

the auxiliary cavity comprises at least two sub-cavities which are arranged around the outer side of the middle airflow channel at intervals.

8. The silencing and noise-reducing device according to claim 1, wherein a flow equalizing cover is arranged on one end cover, far away from the expansion cavity, of the through air channel, a flow equalizing cavity is formed in the flow equalizing cover, and at least two flow equalizing holes are formed in the flow equalizing cover.

9. The muffling noise reducer of claim 8, wherein the sum of the cross-sectional areas of the at least two flow equalization holes is greater than the cross-sectional area of the intermediate gas flow passage.

10. The muffling and noise reducing device of claim 9, wherein the flow equalizing cover comprises a side wall surrounding the outside of the through air passage and an end cover covering one end of the side wall far away from the through air passage, and the flow equalizing holes are all arranged on the side wall.

11. The muffling noise reducer of claim 10, wherein each of the flow equalizing holes is equally spaced around the sidewall, each of the flow equalizing holes being equally spaced along the axial direction of the sidewall.

12. The muffling and noise reducing device of claim 1, wherein the cross-sectional shape of the expansion chamber is both a center symmetrical pattern and an axis symmetrical pattern.

13. The sound damping and noise reducing device according to any one of claims 1-12, characterized in that it comprises a throttle body and sound damping and noise reducing members embedded in the throttle body; wherein,,

the middle air flow channel, the expansion cavity and the straight-through air passage are all formed in the silencing noise reduction piece; or the middle airflow channel is formed in the silencing noise reduction piece, the capacity expansion cavity is formed by encircling the silencing noise reduction piece and the throttling parent body, and the straight-through air channel is formed in the throttling parent body.

14. An atomizing device, comprising the silencing and noise-reducing device as set forth in any one of claims 1-13, wherein the interior of the atomizing device has two air passages, the silencing and noise-reducing device is disposed in the atomizing device and between the two air passages, the throttling air passage is communicated with the two air passages, and the minimum cross-sectional area of the two air passages is larger than the maximum cross-sectional area of the throttling air passage.