CN216907882U

CN216907882U - Air duct assembly and cleaning device

Info

Publication number: CN216907882U
Application number: CN202123435718.8U
Authority: CN
Inventors: 李彤; 叶力荣
Original assignee: Shenzhen Silver Star Intelligent Group Co Ltd
Current assignee: Shenzhen Silver Star Intelligent Group Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-08
Anticipated expiration: 2031-12-30

Abstract

The utility model relates to the technical field of pipeline structures, and provides an air duct assembly and a cleaning device. The resonant cavity is arranged on the air duct shell, the air inlet hole is formed in the cavity wall of the resonant cavity to form a resonant noise reduction structure, the partition piece is arranged in the air duct shell to separate the air outlet of the air duct shell to form the first air outlet and the second air outlet, noise generated by air flow flowing through the air duct component can be effectively reduced, and the noise reduction effect is good.

Description

Air duct assembly and cleaning device

Technical Field

The utility model relates to the technical field of pipeline structures, and particularly provides an air duct assembly and a cleaning device.

Background

With the increasing living standard of people, cleaning devices such as dust collectors and sweeping robots are popularized in families, wherein the cleaning devices with low working noise are more popular among consumers.

At present, because cleaning device's overall structure is more complicated, there is regularity and the irregular alternative dynamic change's of regularity in the noise production principle of different work modules the condition, in addition the refraction of noise, reflection, interference, stack, absorption etc. factor, lead to cleaning device's the degree of difficulty of making an uproar to improve by a wide margin, consequently, owing to receive the restriction of product cost and technical difficulty, traditional cleaning device is generally through adopting the deep bead, parts such as porous sound absorbing material reach the purpose of making an uproar, but above-mentioned means of making an uproar is more single, the noise reduction effect is relatively poor, still can't satisfy people to cleaning device's the requirement of making an uproar.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims to provide an air duct assembly and a cleaning device, and aims to solve the technical problem that the noise reduction effect of the conventional cleaning device is poor.

In order to achieve the purpose, the embodiment of the utility model adopts the technical scheme that: an air duct assembly comprising: the air duct shell is provided with an air duct, an air inlet positioned at one end of the air duct and an air outlet positioned at the other end of the air duct, the air duct shell is provided with a resonant cavity, the cavity wall of the resonant cavity is provided with an air inlet, and the resonant cavity is communicated with the air duct through the air inlet;

the separator, set up in the wind channel casing, the separator is used for with the air outlet separates formation first air outlet and second air outlet.

The air duct assembly provided by the embodiment of the utility model at least has the following beneficial effects: firstly, a resonant cavity is arranged on an air duct shell, an air inlet hole is formed in the wall of the resonant cavity to form a resonance noise reduction structure, the resonant cavity is communicated with an air duct of the air duct shell through the air inlet hole, when air flows in the air duct, sound waves with the frequency close to the inherent frequency of the resonance noise reduction structure enter the resonant cavity through the air inlet hole, and then resonance is generated in the resonant cavity, so that the energy of the part of the sound waves can be consumed, and the part of the sound waves are weakened to achieve the purpose of noise reduction; in addition, through set up the separator in order to form first air outlet and second air outlet with the air outlet separation of wind channel casing in the wind channel casing, can divide into the air current in the wind channel two strands of less air currents, two strands of less air currents are outwards discharged from first air outlet and second air outlet respectively, can decompose the sound intensity of the produced noise of air current like this to can effectively reduce the sound intensity of the noise of same position, in order to reach the purpose of making an uproar. Therefore, the air duct assembly can effectively reduce noise generated by air flow flowing through the air duct assembly, and the noise reduction effect is good.

In one embodiment, the ratio of the volume of the resonance chamber to the flow area of the air intake hole is in the range of 3-150.

In one embodiment, the area of the air inlet is smaller than that of the air outlet.

In one embodiment, the width of the partition gradually increases toward the outlet.

In one embodiment, the separator is recessed to form a containing cavity, and a noise reduction material is arranged in the containing cavity.

In one embodiment, the outer surface of the air duct housing is protruded to form the resonance cavity.

In one embodiment, the air duct assembly further comprises a sealing cover covering the resonant cavity, so that the resonant cavity is sealed.

In one embodiment, the air duct shell comprises an upper shell and a bottom shell, and the upper shell and the bottom shell cover each other.

In one embodiment, the partition is integrally formed with the upper case or the bottom case.

In order to achieve the above object, an embodiment of the present invention further provides a cleaning device, which includes a base, a fan, and the air duct assembly according to any one or more of the above embodiments, where the fan and the air duct assembly are respectively installed on the base, and an air outlet end of the fan is connected to an air inlet of an air duct housing of the air duct assembly.

Since the cleaning device adopts all embodiments of the air duct assembly, at least all the advantages of the embodiments are achieved, and no further description is given here.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of a part of a cleaning device according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the cleaning device shown in FIG. 1 at A;

FIG. 3 is a schematic, partially exploded view of the air duct assembly of the cleaning device of FIG. 1;

FIG. 4 is a schematic view of an assembled structure of an upper case and a partition of the air duct assembly in the cleaning device shown in FIG. 1.

Wherein, in the figures, the respective reference numerals:

100. a cleaning device; 110. an air duct assembly; 111. an air duct housing; 1111. an air inlet; 1112. an air outlet; 11121. a first air outlet; 11122. a second air outlet; 1113. a resonant cavity; 1114. an air inlet; 1115. a substrate; 11151. an upper shell; 11152. a bottom case; 1116. a surrounding wall; 112. a separator; 1121. an accommodating cavity; 113. a sealing cover; 120. a base.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The first aspect of the present invention provides an air duct assembly 110, which can be connected to an air outlet end of a fan, and the air duct assembly 110 can be applied to, but is not limited to, a cleaning device 100 such as a sweeping robot, a mopping robot, a sweeping and mopping integrated robot, and the like.

The air duct assembly 110 will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 4, the air duct assembly 110 includes an air duct housing 111 and a partition 112, the air duct housing 111 has an air duct, an air inlet 1111 located at one end of the air duct, and an air outlet 1112 located at the other end of the air duct, wherein the air inlet 1111 is used for connecting with an air outlet end of a fan, and the air outlet 1112 is used for communicating the air duct with an external space. The air duct housing 111 has a resonant cavity 1113, the cavity wall of the resonant cavity 1113 has an air inlet 1114, and the resonant cavity 1113 is connected to the air duct through the air inlet 1114. The partition 112 is disposed in the air duct housing 111, specifically, the partition 112 is disposed in the air duct housing 111 at a position close to the air outlet 1112, and the partition 112 is configured to partition the air outlet 1112 into a first air outlet 11121 and a second air outlet 11122.

Firstly, a resonance cavity 1113 is arranged on the air duct shell 111, and an air inlet 1114 is arranged on the cavity wall of the resonance cavity 1113 to form a resonance noise reduction structure, the resonance cavity 1113 is communicated with the air duct of the air duct shell 111 through the air inlet 1114, when the air flow flows in the air duct, the sound wave with the frequency close to the natural frequency of the resonance noise reduction structure enters the resonance cavity 1113 through the air inlet 1114, and then resonance is generated in the resonance cavity 1113, so that the energy of the part of the sound wave can be consumed, and the part of the sound wave is weakened, so as to achieve the purpose of noise reduction; in addition, the partition 112 is arranged in the air duct shell 111 to partition the air outlet 1112 of the air duct shell 111 into the first air outlet 11121 and the second air outlet 11122, so that the air flow in the air duct can be divided into two smaller air flows, and the two smaller air flows are respectively discharged from the first air outlet 11121 and the second air outlet 11122, and thus the sound intensity of the noise generated by the air flow can be decomposed, and the sound intensity of the noise at the same position can be effectively reduced, so that the purpose of reducing the noise is achieved. Therefore, the air duct assembly 110 can effectively reduce noise generated by air flow passing through the air duct assembly, and the noise reduction effect is good.

Alternatively, the air inlet holes 1114 may be circular holes, square holes, triangular holes, etc., and are not particularly limited herein.

Alternatively, the resonant cavity 1113 may be a cylindrical cavity, a spherical cavity, a square-cylindrical cavity, or the like, and is not limited herein.

Optionally, the number of the resonant cavities 1113 may be one or multiple, when the number of the resonant cavities 1113 is multiple, the cavity wall of each resonant cavity 1113 is respectively provided with an air inlet 1114, each resonant cavity 1113 is communicated with the air duct through the corresponding air inlet 1114, in other words, the air duct housing 111 is provided with multiple resonance noise reduction structures, the natural frequencies of the resonance noise reduction structures may be the same or partially the same, or may be different, and may specifically be determined according to the actual working condition requirement, which is not specifically limited herein.

In an embodiment, please refer to fig. 2, the air duct housing 111 is a bent structure, in other words, the air duct housing 111 has at least one corner, so that the air duct in the air duct housing 111 forms a zigzag air duct, and thus the flow speed of the air flow decreases after passing through each corner, thereby effectively reducing the generation of high frequency noise and further improving the noise reduction effect of the air duct assembly 110.

Alternatively, the number of corners of the duct housing 111 may be determined according to actual working conditions, and may be specifically one, two, three, and the like, which is not specifically limited herein.

According to the formula

The natural frequency of the resonant noise reducing structure can be calculated, where f represents the natural frequency of the resonant noise reducing structure, c represents the speed of sound, s represents the flow area of the intake ports 1114, l represents the length of the intake ports 1114, and v represents the volume of the resonant chamber 1113. As can be seen from the above formula, the natural frequency of the resonant noise reduction structure is related to the volume of the resonant cavity 1113, the length of the air inlet 1114 and the flow area of the air inlet 1114, the length of the air inlet 1114 and the volume of the resonant cavity 1113 can be adjusted according to the actual working conditions to change the natural frequency of the resonant noise reduction structure.

In one embodiment, the ratio of the volume of the resonant chamber 1113 to the flow area of the intake ports 1114 ranges from 3 to 150, and specifically, the ratio of the volume of the resonant chamber 1113 to the flow area of the intake ports 1114 can range from 3, 50, 150, etc., without limitation.

By limiting the ratio of the volume of the resonant cavity 1113 to the flow area of the air inlet 1114 to the above range, the sound wave with most frequencies generated by the air flow discharged from the fan can be effectively covered, and in practical applications, the ratio of the volume of the resonant cavity 1113 to the flow area of the air inlet 1114 can be selected within the above range according to actual working conditions, so as to eliminate the sound wave with corresponding frequencies.

In one embodiment, the area of the intake 1111 is smaller than the area of the outlet 1112, and it is understood that the volume of the portion of the air duct inside the air duct housing 111 near the outlet 1112 is also larger than the volume of the portion of the air duct inside the air duct housing 111 near the intake 1111. In the process that the air flow flows from the partial air channel with the smaller volume to the partial air channel with the larger volume, the speed of the air flow is gradually reduced, so that the generation of high-frequency noise can be effectively reduced, and meanwhile, when the air flow flows through the partial air channel with the larger volume, the transmission distance of sound waves is increased, so that the loss of sound wave energy can be accelerated, and the noise reduction effect of the air channel assembly 110 can be further improved.

Specifically, a portion of the air duct in the air duct housing 111 near the air inlet 1111 is a linear air duct, that is, the portion of the air duct extends from the air inlet 1111 to the air outlet 1112 with an equal width, and a portion of the air duct in the air duct housing 111 near the air outlet 1112 is gradually increased in width toward the air outlet 1112, so that the portion of the air duct in the air duct housing 111 near the air outlet 1112 is substantially in a trumpet-shaped structure, which can gradually slow down the speed of the air flow after the air flow enters the portion of the air duct in the air duct housing 111 near the air outlet 1112, thereby further reducing the generation of high-frequency noise, and further improving the noise reduction effect of the air duct assembly 110.

In one embodiment, as shown in fig. 4, the width of the partition 112 gradually increases toward the air outlet 1112. Specifically, the partition 112 is substantially in a triangular structure, and when the airflow reaches the end of the partition 112 far away from the air outlet 1112, the airflow is divided into two branches, one branch flows to the first air outlet 11121 along the inclined surface on one side of the partition 112, and the other branch flows to the second air outlet 11122 along the inclined surface on the other side of the partition 112, so that the smoothness of the airflow can be effectively improved, and the generation of noise caused by the generation of cyclone in the air duct housing 111 can be avoided.

In an embodiment, please refer to fig. 4, the partition 112 is recessed to form a receiving cavity 1121, and a noise reduction material is disposed in the receiving cavity 1121, when the airflow passes through the partition 112, the noise reduction material absorbs a portion of sound waves generated by the airflow, so as to further improve the noise reduction effect of the air duct assembly 110.

It should be noted that the noise reduction material includes, but is not limited to, organic fiber material, hemp felt, inorganic fiber material, glass wool, rock wool, mineral wool, urea-formaldehyde foam, and urethane foam.

In one embodiment, please refer to fig. 2 and fig. 3, the resonant cavity 1113 is disposed on the outer wall of the air duct housing 111, specifically, the air duct housing 111 includes a base 1115 and an enclosure wall 1116, the air duct is disposed inside the base 1115, the enclosure wall 1116 is formed by protruding the outer surface of the base 1115, the enclosure wall 1116 and a portion of the outer wall of the base 1115 enclose the resonant cavity 1113, in other words, the portion of the outer wall of the base 1115 serves as a portion of the wall of the resonant cavity 1113, the portion of the outer wall of the base 1115 is provided with the air inlet 1114, and the resonant cavity 1113 is connected to the air duct inside the base 1115 through the air inlet 1114.

In another embodiment, the resonant cavity 1113 is disposed on the inner wall of the air duct housing 111, specifically, the air duct housing 111 includes a base 1115 and an enclosing wall 1116, the inner surface of the base 1115 is protruded to form the enclosing wall 1116, in other words, the enclosing wall 1116 and a part of the inner wall of the base 1115 enclose the resonant cavity 1113, the enclosing wall 1116 is opened with the above-mentioned air inlet 1114, and the resonant cavity 1113 is communicated with the air duct in the base 1115 through the air inlet 1114.

In one specific example of the above two embodiments, please refer to fig. 3, the enclosing wall 1116 is a ring structure, that is, both ends of the enclosing wall 1116 are open ends, the enclosing wall 1116 is integrally formed with the base 1115, the air duct assembly 110 further includes a sealing cover 113, one open end of the enclosing wall 1116 is matched with the wall of the base 1115 to seal the open end, the sealing cover 113 is covered on the other open end of the enclosing wall 1116 to seal the resonant cavity 1113, so that, during the manufacturing process, the air duct housing 111 can be ejected towards the direction of the open end of the enclosing wall 1116 away from the base 1115, and the sealing cover 113 is covered on the open end of the enclosing wall 1116 away from the base 1115 after being separately formed, which can further facilitate the manufacturing of the air duct housing 111.

In another specific example of the above two embodiments, enclosing wall 1116 may be an integral cap structure, that is, one end of enclosing wall 1116 is an open end and the other end is a closed end, the open end of enclosing wall 1116 is matched with the wall of base 1115 to make resonant cavity 1113 airtight, in this specific example, in order to facilitate the manufacturing of duct housing 111, base 1115 and enclosing wall 1116 are separately formed, and then enclosing wall 1116 is assembled on base 1115, specifically, the assembling manner of enclosing wall 1116 and base 1115 includes various ways, for example, a snap-in portion is provided at the edge of the open end of enclosing wall 1116, a bayonet is provided on the wall of base 1115, and the snap-in portion is snapped into the bayonet to connect enclosing wall 1116 and base 1115; as another example, the open end edge of perimeter wall 1116 is bonded to the wall of base 1115.

The integral molding method includes, but is not limited to, an injection molding process and a press molding process.

In one embodiment, as shown in fig. 2, the duct housing 111 includes an upper housing 11151 and a bottom housing 11152, and the upper housing 11151 and the bottom housing 11152 cover each other to form the base 1115, so that the upper housing 11151 and the bottom housing 11152 can be separately formed during the manufacturing process, and then the upper housing 11151 and the bottom housing 11152 are assembled with each other, which further facilitates the manufacturing process of the duct housing 111.

Specifically, the upper casing 11151 and the bottom casing 11152 may be assembled in various manners, for example, connecting columns are respectively disposed on two opposite sides of the upper casing 11151, inserting cylinders are respectively disposed on two opposite sides of the bottom casing 11152, and the connecting columns are inserted into the inserting cylinders and are in interference fit with the inserting cylinders, so as to connect the upper casing 11151 and the bottom casing 11152 to each other; for another example, the opposite sides of the upper housing 11151 are respectively provided with a male buckle, the opposite sides of the bottom housing 11152 are respectively provided with a female buckle, and the male buckle and the female buckle are mutually engaged to realize the mutual connection of the upper housing 11151 and the bottom housing 11152.

In the above embodiments, in order to further reduce the difficulty of manufacturing the air duct assembly 110 and improve the production efficiency of the air duct assembly 110, the partition 112 is integrally formed with the upper casing 11151, or the partition 112 is integrally formed with the lower casing 11152.

In a second aspect of the present invention, referring to fig. 1, a cleaning device 100 is provided, where the cleaning device 100 includes a base 120, a fan (not shown), and an air duct assembly 110 according to any one or more embodiments of the foregoing disclosure, where the fan and the air duct assembly 110 are respectively mounted on the base 120, and an air outlet end of the fan is connected to an air inlet 1111 of an air duct housing 111 of the air duct assembly 110.

The cleaning device 100 includes, but is not limited to, a sweeping robot, a mopping robot, and a sweeping and mopping integrated robot.

Since the cleaning device 100 employs all embodiments of the air duct assembly 110, at least all advantages of the embodiments are provided, and no further description is provided herein.

In one embodiment, to further reduce the manufacturing difficulty of the cleaning device 100 and improve the manufacturing efficiency of the cleaning device 100, the bottom housing 11152 of the duct housing 111 is integrally formed with the base 120.

The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the utility model, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. An air duct assembly (110), the air duct assembly (110) comprising:

the air duct shell (111) is provided with an air duct, an air inlet (1111) located at one end of the air duct and an air outlet (1112) located at the other end of the air duct, a resonant cavity (1113) is formed in the air duct shell (111), an air inlet (1114) is formed in the cavity wall of the resonant cavity (1113), and the resonant cavity (1113) is communicated with the air duct through the air inlet (1114);

a partition (112) disposed in the air duct housing (111), wherein the partition (112) is used for partitioning the air outlet (1112) to form a first air outlet (11121) and a second air outlet (11122).

2. The air duct assembly (110) of claim 1, wherein: the ratio of the volume of the resonance cavity (1113) to the flow area of the air inlet holes (1114) ranges from 3 to 150.

3. The air duct assembly (110) of claim 1, wherein: the area of the air inlet (1111) is smaller than that of the air outlet (1112).

4. The air duct assembly (110) according to any of claims 1-3, wherein: the width of the partition (112) is gradually increased toward the direction approaching the air outlet (1112).

5. The air duct assembly (110) according to any of claims 1-3, wherein: the separator (112) is concavely provided with an accommodating cavity (1121), and noise reduction materials are arranged in the accommodating cavity (1121).

6. The air duct assembly (110) according to any of claims 1-3, wherein: the outer surface of the air duct shell (111) is convexly provided with the resonant cavity (1113).

7. The air duct assembly (110) of claim 6, wherein the air duct assembly (110) further comprises a sealing cover (113), the sealing cover (113) covering the resonance chamber (1113) such that the resonance chamber (1113) is sealed.

8. The air duct assembly (110) according to any of claims 1-3, wherein: the air duct shell (111) comprises an upper shell (11151) and a bottom shell (11152), and the upper shell (11151) and the bottom shell (11152) are mutually covered.

9. The air duct assembly (110) of claim 8, wherein: the partition (112) is integrally formed with the upper case (11151) or the bottom case (11152).

10. A cleaning device (100) characterized by: the cleaning device (100) comprises a base (120), a fan and an air duct assembly (110) as claimed in any one of claims 1 to 9, the fan and the air duct assembly (110) are respectively mounted on the base (120), and an air outlet end of the fan is connected to an air inlet (1111) of an air duct housing (111) of the air duct assembly (110).