A dust extractor

Abstract

The dust collector provided by the embodiment of the application comprises a motor and a silencing device arranged on one side of an air outlet in the axial direction of the motor, the motor is configured with an impeller for generating a dust collection airflow, an air outlet for discharging the dust collection airflow is arranged on a motor shell of the motor; the silencing device is provided with an airflow channel, a silencing cavity, an air inlet and an air outlet for discharging air to the outside, the airflow channel is connected with the air inlet and the air outlet, the silencing cavity is used for silencing the airflow entering the silencing device, and the air outlet is located in the circumferential direction of the silencing device, so that the airflow silencing processed by the silencing device is discharged from the circumferential direction of the silencing device to the surrounding environment. The dust collector in the embodiment of the application achieves the purpose of reducing the noise of the airflow discharged by the motor through the silencing device, so that the discharged airflow is changed to be discharged along the circumferential direction of the silencing device, direct blowing of the airflow to the user is avoided, and the use experience of the user is improved.

Description

Technical Field

[0001] This invention relates to the field of noise reduction structure technology, and in particular to a vacuum cleaner. Background Technology

[0002] Vacuum cleaners utilize a motor to drive blades to rotate at high speed, creating negative air pressure within a sealed cylinder.

[0003] The suction source then draws in the dust to achieve the purpose of cleaning.

[0004] The high-speed airflow generated by the motor during operation can produce significant noise, which in turn affects the user experience. Summary of the Invention

[0005] In view of this, the present application aims to provide a vacuum cleaner that can reduce the noise of the airflow discharged during motor operation.

[0006] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0007] This invention provides a vacuum cleaner, which includes:

[0008] The motor is equipped with an impeller for generating a suction airflow, and the motor housing is provided with an exhaust port for discharging the suction airflow.

[0009] A silencer is provided on one side of the exhaust port along the axial direction of the motor. The silencer has an airflow channel, a silencer chamber, an air inlet, and an air outlet for exhausting air to the outside. The airflow channel connects the air inlet and the air outlet. The silencer chamber is used to silence the airflow entering the silencer. The air outlet is located circumferentially to the silencer so that the airflow silenced by the silencer is discharged from the circumference of the silencer to the surrounding environment.

[0010] In some embodiments, the airflow channel is filled with a resistive material; and / or, the silencing cavity is filled with a resistive material.

[0011] In some embodiments, the silencing device includes a cylinder and a flow guiding unit. The air inlet is located at a first axial end of the cylinder, and the second axial end of the cylinder is open. The air outlet penetrates the cylinder wall radially, and the flow guiding unit is inserted into the cylinder through the open portion of the cylinder. The cylinder and / or the flow guiding unit are provided with the silencing cavity.

[0012] In some embodiments, the silencing cavity includes a first silencing cavity, and the flow guiding unit includes a cylindrical member, a flow guiding member, and an annular member. The flow guiding member and the annular member both surround the circumference of the cylindrical body. The internal space of the cylindrical member forms the first silencing cavity. A first sound-permeable hole is provided on the cylindrical wall facing the motor side. The annular member is located on the side of the flow guiding member closer to the motor. The annular member and the flow guiding member are axially spaced. The space enclosed by the cylindrical member, the annular member, and the flow guiding member together forms at least a portion of the airflow channel. An overflow port is provided on the annular member corresponding to the air inlet. The air outlet is provided on the cylindrical body between the annular member and the flow guiding member.

[0013] In some embodiments, the outer diameter of the cylindrical member is smaller than the aperture of the flow port, and the cylindrical member extends into the flow port from the side of the cylindrical member facing the motor.

[0014] In some embodiments, the silencing cavity includes a second silencing cavity, the annular member is a hollow structure to form the second silencing cavity, and the annular member has a second sound-permeable hole on the side facing the guide member.

[0015] In some embodiments, the annular member includes an inner circumferential plate, an outer circumferential plate, a first axial plate, and a second axial plate. The first axial plate and the second axial plate are both circumferentially surrounding the cylindrical member and are arranged axially spaced apart. The inner circumferential plate and the outer circumferential plate are both connected between the first axial plate and the second axial plate and extend circumferentially. The outer circumferential plate is located on the side of the inner circumferential plate that is radially away from the cylindrical member, and the second axial plate is located on the side of the first axial plate that is closer to the guide member. The inner circumferential plate, the outer circumferential plate, the first axial plate, and the second axial plate together form the second silencing cavity, and the second axial plate is provided with a second sound-permeable hole.

[0016] In some embodiments, the silencing cavity includes a third silencing cavity, the flow guide includes a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are axially spaced to form a first space, the first space is opened on the side radially away from the cylinder to form a placement port, the cylinder closes the placement port and the first space forms the third silencing cavity, the first mounting plate is located on the side of the second mounting plate facing the annular member, and the first mounting plate is provided with a third sound-permeable hole.

[0017] In some embodiments, the silencing cavity includes a fourth silencing cavity, the cylinder includes a cylindrical body and a sealing plate, the cylindrical body is cylindrical, the sealing plate is connected to the inner wall of the cylindrical body and extends radially, the sealing plate is located on the side of the guide member near the motor, and the air inlet is disposed on the sealing plate, the cylindrical body, the sealing plate and the annular member surround to form the fourth silencing cavity, and the sealing plate is provided with a fourth sound-permeable hole.

[0018] In some embodiments, the sealing plate has a plurality of axially extending positioning posts on the side opposite to the flow guiding unit, and the positioning posts are circumferentially spaced at the edge of the air inlet.

[0019] In some embodiments, the inner wall of the cylinder is provided with a radially protruding positioning protrusion that extends axially, and the flow guiding unit is provided with a positioning groove along its radial edge, wherein the positioning protrusion is inserted into the positioning groove from the axial direction.

[0020] In some embodiments, a portion of the cylinder body is recessed inward to form the positioning protrusion, and a groove is formed on the circumferential outer surface of the cylinder body. The groove extends to the edge of the cylinder body away from the sealing plate. The end of the groove near the sealing plate is a blind end. The sealing plate is provided with a plurality of connecting posts on the side facing the motor, and the connecting posts are provided with connecting through holes communicating with the groove.

[0021] The vacuum cleaner in this embodiment of the invention achieves the purpose of reducing the noise of the exhaust airflow from the motor by setting a silencing device downstream of the motor's exhaust port. The silencing device employs a silencing cavity, which not only improves the noise reduction effect and sound quality but also achieves a compact structure, improving its adaptability. The silencing device redirects the exhaust airflow to be discharged circumferentially, preventing direct airflow onto the user and improving the user experience. It also helps maintain the vacuum cleaner's neat appearance, further enhancing the user experience. Furthermore, by changing the airflow direction, the airflow velocity is reduced, lowering airflow noise. Simultaneously, it facilitates extending the airflow distance within the silencing device, allowing the noise generated by the airflow to be better processed by the silencing cavity, thus improving the silencing effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a noise reduction device in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the explosion of the silencer device;

[0024] Figure 3 for Figure 1 A schematic diagram of the central silencing device from another perspective;

[0025] Figure 4 for Figure 3 A half-section view of the AA position, where the dashed arrows represent the airflow path in the silencer;

[0026] Figure 5 This is a schematic diagram of a flow guiding unit in one embodiment of the present invention;

[0027] Figure 6 for Figure 5 A schematic diagram of the central guide unit from another perspective;

[0028] Figure 7 for Figure 6 Schematic diagram of half section view at the position of BB in the middle;

[0029] Figure 8 This is a schematic diagram of the cylinder in one embodiment of the present invention;

[0030] Figure 9 for Figure 8 A schematic diagram of the middle cylinder from another perspective;

[0031] Figure 10 for Figure 9 Schematic diagram of half section view at the CC position;

[0032] Figure 11 This is a partial schematic diagram of a vacuum cleaner according to an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures

[0034] Silencing device 10; air inlet 10a; air outlet 10b; airflow channel 10c; first silencing chamber 10d; second silencing chamber 10e; third silencing chamber 10f; fourth silencing chamber 10g; cylinder 11; cylinder body 111; groove 111a; connecting through hole 111b; flange 1111; positioning protrusion 1112; connecting post 1113; sealing plate 112; fourth sound transmission hole 112a; positioning post 1121; flow guiding unit 1 2; Flow outlet 12a; Positioning groove 12b; Cylindrical component 121; First sound-permeable hole 121a; Cover plate 1211; Flow guide 122; Third sound-permeable hole 122a; First space 122b; First mounting plate 1221; Second mounting plate 1222; Annular component 123; Second sound-permeable hole 123a; Inner circumference plate 1231; Outer circumference plate 1232; First axial plate 1233; Second axial plate 1234; Support column 124 Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0036] In the description of this application, the "circumferential" orientation or positional relationship is based on the appendix. Figure 3 The orientation or positional relationship shown, "axial" and "radial" orientation or positional relationship are based on the attached... Figure 4 The orientations or positional relationships shown are intended only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] This invention provides a vacuum cleaner, see below. Figures 1 to 4 as well as Figure 11 It includes a motor and a silencer 10 disposed on the side of the exhaust port along the axial direction of the motor.

[0038] The motor is equipped with an impeller for generating suction airflow, and the motor housing is provided with an exhaust port for discharging the suction airflow.

[0039] After the motor starts, it drives the impeller to rotate. The impeller stirs the air to form an airflow, which creates a negative pressure at the nozzle of the vacuum cleaner relative to the outside. Under the action of negative pressure, the air at the nozzle carries dust and debris into the vacuum cleaner to form a suction airflow, thereby achieving the purpose of the vacuum cleaner to pick up dust and debris.

[0040] The vacuum cleaner is equipped with a filter screen, through which the suction airflow can pass. The dust and debris carried in the suction airflow are deposited in the filter screen and / or collection device due to the obstruction effect of the filter screen, thus achieving the purpose of the vacuum cleaner to filter and collect dust and debris in the suction airflow.

[0041] Understandably, the filter is removable. After a period of use, users can remove the filter from the vacuum cleaner and clean it to maintain the vacuum cleaner's filtering function and reduce the risk of filter clogging.

[0042] The filter can be replaced after it reaches the end of its service life.

[0043] Understandably, the collection device is detachable so that users can remove it and drain the dust and debris accumulated inside.

[0044] After passing through the filter, the airflow flows through the exhaust port and is discharged. The silencer 10 is located on the exhaust port side of the motor axis, that is, the silencer 10 is located downstream of the exhaust port along the airflow direction, so as to silence the outflowing airflow.

[0045] See Figure 4The silencer 10 is provided with an airflow channel 10c, a silencer chamber, an air inlet 10a, and an air outlet 10b for exhausting air to the outside.

[0046] Airflow channel 10c connects air inlet 10a and air outlet 10b. This guides the airflow direction within the silencer 10, facilitating airflow discharge from air outlet 10b.

[0047] The silencing cavity is used to silence the airflow entering the silencing device 10. The structural characteristics of the silencing cavity itself achieve the purpose of reducing noise wave energy and weakening noise intensity. At the same time, it avoids the need for thick sound-absorbing materials, thus preventing the silencing device 10 from being too large, resulting in a compact structure and improved adaptability.

[0048] It is understandable that the inner wall of the silencing cavity is provided with sound-permeable holes so that the silencing cavity can perform the function of silencing treatment.

[0049] The specific principle by which the silencing cavity achieves noise reduction is not limited.

[0050] For example, the structure of the anechoic chamber is designed based on the Helmholtz resonance principle. When the frequency of the incident noise wave matches the natural frequency of the anechoic chamber, the air at the sound-permeable opening will vibrate violently relative to the air inside the anechoic chamber, generating heat through friction. This heat is dissipated by converting the mechanical energy of the noise wave into intramolecular energy, thereby reducing the noise intensity. Based on the Helmholtz resonance principle, the design of the anechoic chamber satisfies the following formula:

[0051]

[0052] Where f0 is the natural frequency of the anechoic chamber; c is the speed of sound; S is the area of ​​the sound-permeable hole, S=πr²; r is the radius of the sound-permeable hole; V is the volume of the anechoic chamber; t is the wall thickness of the corresponding inner wall of the anechoic chamber; and d is the diameter of the sound-permeable hole. Because the air near both ends of the air column of the sound-permeable hole also participates in the vibration, t needs to be corrected, and its value is generally taken as 0.8d.

[0053] It is understandable that each anechoic chamber has multiple sound-transmitting holes of the same diameter, therefore the above formula can be transformed into:

[0054]

[0055] Where n is the number of sound-permeable holes, and S0 is the area of ​​a single sound-permeable hole.

[0056] For example, the structure of the silencing cavity is based on the silencing principle of a quarter-wavelength tube. Noise waves are injected into the silencing cavity through the sound-transmitting hole and a reflected sound wave is formed inside the silencing cavity. The reflected sound wave is out of phase with the noise wave, thereby reducing the amplitude of the noise wave and even canceling out part of the noise wave, thus achieving the purpose of silencing.

[0057] By rationally designing the structural dimensions of the anechoic chamber and the sound-permeable hole, noise at specific frequencies can be reduced in a targeted manner, thereby improving sound quality while reducing noise.

[0058] The air outlet 10b is located circumferentially in the silencer 10, so that the airflow treated by the silencer 10 is discharged circumferentially into the surrounding environment. Changing the airflow from axial to circumferential reduces the direct impact of airflow from the vacuum cleaner on the user, improving the user experience. By guiding the airflow to change direction at least once within the silencer 10, the airflow velocity is reduced, thereby reducing airflow noise. Extending the radial dimension of the silencer 10 reduces its axial dimension, ensuring that the silencer 10 remains flush with the outer surface of the vacuum cleaner cylinder 11 after being embedded, further improving the user experience. Extending the airflow path within the silencer 10 allows for the creation of more silencer cavities connected to the airflow path, thereby improving the silencing effect.

[0059] In this embodiment of the invention, the vacuum cleaner achieves the purpose of reducing the noise of the exhaust airflow from the motor by setting a silencing device 10 downstream of the motor's exhaust port. The silencing device 10 employs a silencing cavity, which not only improves the noise reduction effect and sound quality but also achieves a compact structure, improving its adaptability. The silencing device 10 redirects the exhaust airflow to be discharged circumferentially, preventing direct airflow onto the user and enhancing the user experience. It also helps maintain the vacuum cleaner's neat appearance, further improving the user experience. Furthermore, by changing the airflow direction, the airflow velocity is reduced, lowering airflow noise. Simultaneously, it facilitates extending the airflow distance within the silencing device 10, allowing the noise generated by the airflow to be better processed by the silencing cavity, thus improving the silencing effect.

[0060] It is understandable that adding resistive material to the silencing device 10 can absorb the noise of the airflow, thereby further improving the silencing effect of the silencing device 10.

[0061] In some embodiments, the airflow channel 10c is filled with a resistive material. On the one hand, this reduces the airflow velocity in the airflow channel 10c, thereby reducing airflow noise; on the other hand, the resistive material can directly absorb the noise generated by the airflow in the airflow channel 10c, thereby improving the noise reduction effect of the silencing device 10.

[0062] In some embodiments, the silencing cavity is filled with a resistive material. The resistive material can directly absorb noise conducted into the silencing cavity, thereby improving the noise reduction effect of the silencing device 10.

[0063] Understandably, the specific type of resistive material is not limited, as long as it has a sound-absorbing effect. Resistive materials can be polyester fiber, polyurethane foam, sound-absorbing cotton, etc.

[0064] It is understood that in some embodiments, the silencing device 10 is an integral structure, which allows the silencing device 10 to be manufactured and installed as a whole in the preset installation position of the vacuum cleaner in one go, thereby reducing assembly time and improving production efficiency.

[0065] The silencing device 10 with an integrated structure can be manufactured using additive manufacturing.

[0066] In other embodiments, the muffler 10 has a split structure, meaning it is assembled from multiple components. This facilitates cleaning and maintenance of the muffler 10 after prolonged use, extending its service life. Furthermore, it allows for the installation of resistive materials during assembly, improving the muffler's noise reduction effect.

[0067] For example, see Figures 1 to 4 The silencer 10 includes a cylinder 11 and a flow guiding unit 12. An air inlet 10a is located at the first axial end of the cylinder 11, and the second axial end of the cylinder 11 is open. An air outlet 10b radially penetrates the cylinder wall of the cylinder 11. The flow guiding unit 12 is inserted into the cylinder 11 through the open portion. Guided by the flow guiding unit 12, airflow flows in from the air inlet 10a at the first axial end of the cylinder 11 and flows out from the air outlet 10b on the radial side of the cylinder wall, thus achieving the purpose of redirecting the airflow. After prolonged use, either the cylinder 11 or the flow guiding unit 12 can be replaced to extend the service life of the silencer 10.

[0068] It is understood that at least a portion of the airflow passage 10c is located in the guide unit 12.

[0069] It is understood that the cylinder 11 and the flow guiding unit 12 are detachably connected to allow for disassembly and replacement. The specific connection method is not limited, and can include screw connections, snap-fit ​​connections, threaded connections, etc.

[0070] In some embodiments, see Figure 4 The cylinder 11 is provided with a sound-absorbing cavity so that the airflow can reduce noise as it flows through the surface and / or inside the cylinder 11.

[0071] In some embodiments, see Figure 4 The flow guiding unit 12 is equipped with a noise reduction cavity to reduce noise as the airflow passes through the interior of the flow guiding unit 12.

[0072] It is understood that the structural form of the cylinder 11 and the flow guiding unit 12 is not limited. For example, both the cylinder 11 and the flow guiding unit 12 can adopt an integral structure to reduce assembly time. The specific manufacturing method is not limited, such as machining, injection molding, additive manufacturing, etc.

[0073] Understandably, the internal structure of the flow guiding unit 12 can, while guiding the airflow to change direction, also provide a sound-absorbing cavity along the airflow path to reduce noise during the airflow process.

[0074] In some embodiments, see Figures 4 to 7 The silencing cavity includes a first silencing cavity 10d. The flow guiding unit 12 includes a cylindrical member 121, a flow guiding member 122, and an annular member 123. The flow guiding member 122 and the annular member 123 both surround the circumference of the cylindrical body 11. The internal space of the cylindrical member 121 forms the first silencing cavity 10d. A first sound-permeable hole 121a is provided on the cylindrical wall of the cylindrical member 121 facing the motor. At least a portion of the cylindrical member 121 is located within the axial projection range of the air inlet 10a, so that the airflow flowing in from the air inlet 10a can flow axially through the first sound-permeable hole 121a, thereby reducing the noise of the airflow through the silencing treatment of the first silencing cavity 10d.

[0075] In some embodiments, see Figure 7 The internal space of the cylindrical component 121 is open at the end away from the motor. The cylindrical component 121 includes a cover plate 1211, which is detachably fitted onto the open end of the internal space of the cylindrical component 121. By opening and closing the cover plate 1211, resistive material can be placed inside the first silencing cavity 10d, thereby further improving the silencing effect of the silencing device 10.

[0076] It is understandable that the positional relationship between the cylindrical component 121, the guide component 122, and the annular component 123 is arranged to guide and redirect the airflow flowing into the guide unit 12.

[0077] Specifically, see Figure 4 and Figure 7The annular member 123 is located on the side of the guide member 122 closer to the motor. The annular member 123 and the guide member 122 are axially spaced. The space enclosed by the cylindrical member 121, the annular member 123, and the guide member 122 forms at least a part of the airflow channel 10c. The annular member 123 is provided with an outlet 12a corresponding to the air inlet 10a. The cylindrical body 11 is provided with an outlet 10b at the position between the annular member 123 and the guide member 122. After the airflow flows in from the air inlet 10a, it flows through the outlet 12a into the gap between the annular member 123 and the cylindrical member 121 until the airflow contacts the guide member 122. Since the guide member 122 extends radially, the airflow is turned under the guidance of the guide member 122 and changes to flow radially. Finally, it is discharged through the outlet 10b provided between the annular member 123 and the guide member 122, thereby achieving the purpose of the silencer 10 to guide the airflow to turn and discharge it circumferentially.

[0078] It is understandable that the flow guide 122 is connected to the circumferential outer wall of the cylindrical member 121, and the cylindrical member 121 provides the installation position for the flow guide 122.

[0079] It is understood that the flow guiding unit 12 includes several support members, which are connected between the cylindrical member 121 and the annular member 123; and / or, the support members are connected between the flow guiding member 122 and the annular member 123, and the support members enable the annular member 123 to obtain a stable installation position.

[0080] In some embodiments, see Figure 6 The outer diameter of the cylindrical component 121 is smaller than the diameter of the flow port 12a. The axial projection of the cylindrical component 121 is completely within the projection range of the flow port 12a, so that the first sound-permeable hole 121a faces the flow port 12a directly, which facilitates the first silencing cavity 10d to perform silencing treatment on the flowing air.

[0081] In some embodiments, see Figure 7 The cylindrical member 121 extends into the flow port 12a from the side facing the motor. The inner wall of the cylindrical member 121 and the flow port 12a form part of the airflow channel 10c, so as to guide the flow direction of the airflow in the guide unit 12; at the same time, the axial dimension of the guide unit 12 is reduced, making the structure of the muffler 10 more compact and improving the adaptability of the muffler 10.

[0082] In some embodiments, see Figure 7 The silencing cavity includes a second silencing cavity 10e, and the annular member 123 has a hollow structure to form the second silencing cavity 10e, so as to improve the silencing effect on the airflow flowing through the airflow channel 10c.

[0083] It is understood that the annular component 123 is provided with a second sound-permeable hole 123a connecting the second silencing cavity 10e and the airflow channel 10c. The specific location of the second sound-permeable hole 123a is not limited. For example, the annular component 123 is provided with the second sound-permeable hole 123a on the side facing the cylindrical component 121; or the annular component 123 is provided with the second sound-permeable hole 123a on the side facing the flow guide 122, so that the second sound-permeable holes 123a are arranged radially, reducing the influence of the aperture of the second sound-permeable hole 123a on the axial dimension of the annular component 123, which is beneficial to reducing the axial dimension of the silencing device 10.

[0084] Understandably, the ring-shaped component 123 can be a one-piece molded structure made by additive manufacturing, so as to form a hollow structure while reducing assembly time.

[0085] In some embodiments, see Figure 7 The annular component 123 includes an inner circumferential plate 1231, an outer circumferential plate 1232, a first axial plate 1233, and a second axial plate 1234. The first axial plate 1233 and the second axial plate 1234 are both circumferentially surrounding the cylindrical component 121 and are arranged axially at intervals. The inner circumferential plate 1231 and the outer circumferential plate 1232 are both connected between the first axial plate 1233 and the second axial plate 1234 and extend circumferentially. The outer circumferential plate 1232 is located on the side of the inner circumferential plate 1231 that is radially away from the cylindrical component 121. The second axial plate 1234 is located on the side of the first axial plate 1233 that is close to the guide component 122. The inner circumferential plate 1231, the outer circumferential plate 1232, the first axial plate 1233, and the second axial plate 1234 together form a second silencing cavity 10e. The second axial plate 1234 is provided with a second sound-permeable hole 123a. The inner panel 1231, outer panel 1232, first axial panel 1233 and second axial panel 1234 can be assembled after being manufactured independently. During the assembly process, resistive material can be placed in the second silencing cavity 10e to further improve the silencing effect.

[0086] It is understandable that, provided that the volume of the second silencing cavity 10e meets the requirements for achieving the silencing function, the distance between the first axial plate 1233 and the second axial plate 1234 is smaller than the distance between the inner circumferential plate 1231 and the outer circumferential plate 1232, so as to reduce the size of the annular part 123 in the axial direction.

[0087] It is understood that the guide member 122 is a hollow structure to form a silencing cavity; and / or, the guide member 122 and the cylinder 11 together form a silencing cavity; and / or, the guide member 122 and the cylindrical member 121 together form a silencing cavity to improve the silencing effect on the airflow passing through the airflow channel 10c.

[0088] Understandably, the structure of the flow guide 122 facilitates the placement of resistive material into the silencing cavity.

[0089] Specifically, see Figure 7 The silencing cavity includes a third silencing cavity 10f. The guide member 122 includes a first mounting plate 1221 and a second mounting plate 1222. The first mounting plate 1221 and the second mounting plate 1222 are axially spaced to form a first space 122b. The first space 122b is open on the side radially away from the cylinder 11 to form a placement port. The cylinder 11 closes the placement port and makes the first space 122b form the third silencing cavity 10f. The first mounting plate 1221 is located on the side of the second mounting plate 1222 facing the annular member 123. The first mounting plate 1221 is provided with a third sound-permeable hole 122a. In the assembly of the muffler 10, resistive material is placed into the first space 122b through the placement port, and then the flow guiding unit 12 is installed into the cylinder 11. The placement port is sealed by the inner wall of the cylinder 11. While forming the third muffler cavity 10f in the first space 122b, the resistive material can be retained in the third muffler cavity 10f, further improving the muffler effect of the muffler 10. By using the cylinder 11 to seal the placement port, it is unnecessary to set up an additional opening and closing structure in the flow guiding component 122 for placing the resistive material, thereby simplifying the structure of the flow guiding component 122, reducing the number of parts, lowering manufacturing costs, and making the structure of the muffler 10 more compact.

[0090] In some embodiments, see Figure 5 and Figure 7 The flow guide 122 includes several support columns 124, which extend axially and connect between the first mounting plate 1221 and the second mounting plate 1222. The support columns 124 improve the structural strength of the flow guide 122 and reduce the probability of deformation and vibration of the first mounting plate 1221 under the impact of airflow, thus reducing the noise reduction effect.

[0091] In some embodiments, see Figure 7 The support column 124 extends axially to and connects with the annular member 123. This provides an installation location for the annular member 123 and improves the overall structural strength of the flow guiding unit 12.

[0092] Understandably, the radial cross-section of the support column 124 located in the airflow channel 10c conforms to aerodynamics to reduce noise generated by the airflow as it passes over the surface of the support column 124 and to reduce turbulence. For example, the cross-section of the support column 124 may be circular or teardrop-shaped.

[0093] It is understandable that the cylinder 11 and the flow guiding unit 12 can be arranged together to form a silencing cavity, so as to simplify the structure of the silencing device 10.

[0094] Specifically, see Figure 4The silencing chamber includes a fourth silencing chamber 10g. The cylinder 11 includes a cylinder body 111 and a sealing plate 112. The cylinder body 111 is cylindrical. The sealing plate 112 is connected to the inner wall of the cylinder body 111 and extends radially. The sealing plate 112 is located on the side of the flow guide 122 near the motor, and the air inlet 10a is provided on the sealing plate 112. The cylinder body 111, the sealing plate 112, and the annular member 123 surround to form the fourth silencing chamber 10g. The sealing plate 112 is provided with a fourth sound-permeable hole 112a. This simplifies the structure of the cylinder 11, reduces manufacturing processes, and lowers production costs. At the same time, by utilizing the existing structure in the flow guide unit 12 to form the fourth silencing chamber 10g, the number of parts is reduced while further improving the silencing effect, further reducing production and assembly costs. The fourth sound-permeable hole 112a faces the airflow flowing along the axial direction, so that the fourth sound-absorbing cavity 10g can reduce noise in the airflow as it flows along the closed plate 112 toward the air inlet 10a.

[0095] In some embodiments, the annular member 123 has a limiting protrusion on the side facing the sealing plate 112. The limiting protrusion extends axially and surrounds the edge of the flow port 12a circumferentially. After the flow guiding unit 12 is installed with the cylinder 11, the limiting protrusion abuts against the side of the sealing plate 112 facing the annular member 123 along the axial direction. The limiting protrusion limits the position of the flow guiding unit 12 in the cylinder 11 along the axial direction, so that a portion of the annular member 123 and the sealing plate 112 are previously spaced axially to form a fourth silencing cavity 10g, preventing the annular member 123 and the sealing plate 112 from being completely fitted together.

[0096] In some embodiments, see Figure 10 The distance between the sealing plate 112 and the end of the cylinder 111 closest to the motor is less than the distance between the sealing plate 112 and the end of the cylinder 111 furthest from the motor, so that the cylinder 111 forms a flange 1111 on the side of the sealing plate 112 away from the guide unit 12. The silencing device 10 can be axially positioned during installation into the vacuum cleaner via the flange 1111, preventing the sealing plate 112 from fitting against other internal structures of the vacuum cleaner and thus blocking or obstructing the fourth sound-permeable hole 112a.

[0097] It is understandable that a positioning structure is provided on the cylinder 11 to achieve positioning between the silencer 10 and the motor.

[0098] In some embodiments, see Figures 8 to 10The sealing plate 112 has several axially extending positioning posts 1121 on the side opposite to the air guide unit 12. The positioning posts 1121 are circumferentially spaced at the edge of the air inlet 10a. By positioning the motor with the positioning posts 1121, the probability of incorrect assembly of the muffler 10 is reduced; at the same time, the probability of the motor directly extending into the air inlet 10a is reduced, and an axial gap is created between the sealing plate 112 and the motor, which facilitates the airflow over the surface of the sealing plate 112.

[0099] It is understandable that auxiliary positioning structures are provided on the cylinder 11 and / or the flow guiding unit 12 to facilitate installation between the cylinder 11 and the flow guiding unit 12.

[0100] In some embodiments, see Figure 5 , Figure 6 and Figure 10 The inner wall of the cylinder 111 is provided with a radially protruding positioning protrusion 1112, which extends axially. The flow guiding unit 12 has a positioning groove 12b along its radial edge, and the positioning protrusion 1112 is inserted into the positioning groove 12b axially. The positioning protrusion 1112 is constrained by the inner wall corresponding to the positioning groove 12b, which facilitates positioning during assembly and prevents relative rotation between the cylinder 11 and the flow guiding unit 12 in the circumferential direction, so as to facilitate subsequent connection between the cylinder 11 and the flow guiding unit 12.

[0101] It is understandable that the silencer 10 is detachably connected to other components inside the vacuum cleaner so that the silencer 10 can be disassembled and maintained, such as by threaded connection, screw connection, or elastic snap-fit ​​connection.

[0102] Understandably, the silencing device 10 is provided with an auxiliary connection structure for connecting with other components inside the vacuum cleaner.

[0103] Specifically, see Figure 8 and Figure 9A portion of the cylinder body 111 is recessed inward to form a positioning protrusion 1112. A groove 111a is formed on the circumferential outer surface of the cylinder body 111, extending to the edge of the cylinder body 111 away from the end facing the sealing plate 112. The end of the groove 111a near the sealing plate 112 is a blind end. Multiple connecting posts 1113 are provided on the side of the sealing plate 112 facing the motor. The connecting posts 1113 are provided with connecting through holes 111b communicating with the groove 111a. After the silencer 10 is installed in the preset installation position inside the vacuum cleaner, the screw is inserted from the outside through the groove 111a and passes through the connecting through hole 111b to the threaded hole set in the preset installation position for fastening, thereby fixing the silencer 10. By recessing the cylinder body 111, both the groove 111a and the positioning protrusion 1112 are formed, thereby simplifying the structure of the cylinder body 11 and reducing manufacturing costs. The screw can be fully inserted into the groove 111a, preventing the screw from protruding from the outer surface of the vacuum cleaner, which helps to make the outer surface of the vacuum cleaner neat and improves the user experience.

[0104] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0105] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A vacuum cleaner, characterized in that, The vacuum cleaner includes: The motor is equipped with an impeller for generating a suction airflow, and the motor housing is provided with an exhaust port for discharging the suction airflow. A silencer (10) is disposed on the side of the exhaust port along the axial direction of the motor. The silencer (10) has an airflow channel (10c), a silencer chamber, an air inlet (10a), and an air outlet (10b) for exhausting air to the outside. The airflow channel (10c) connects the air inlet (10a) and the air outlet (10b). The silencer chamber is used to silence the airflow entering the silencer (10). The air outlet (10b) is located circumferentially to the silencer (10) so that the airflow silenced by the silencer (10) is discharged circumferentially to the surrounding environment. The silencing device (10) includes a cylinder (11) and a flow guiding unit (12). The air inlet (10a) is located at the first axial end of the cylinder (11), the second axial end of the cylinder (11) is open, the air outlet (10b) penetrates the cylinder wall of the cylinder (11) radially, and the flow guiding unit (12) is inserted into the cylinder (11) through the open part of the cylinder (11). The cylinder (11) and / or the flow guiding unit (12) are provided with the silencing cavity. The flow guiding unit (12) includes a cylindrical part (121), a flow guiding part (122) and an annular part (123), wherein the flow guiding part (122) and the annular part (123) both surround the circumference of the cylindrical body (11); The annular component (123) includes an inner circumferential plate (1231), an outer circumferential plate (1232), a first axial plate (1233), and a second axial plate (1234). The first axial plate (1233) and the second axial plate (1234) both surround the cylindrical component (121) circumferentially and are spaced apart axially. The inner circumferential plate (1231) and the outer circumferential plate (1232) are both connected between the first axial plate (1233) and the second axial plate (1234), and both extend circumferentially. The outer circumferential plate (1232) is positioned... On the side of the inner circumferential plate (1231) that is radially away from the cylindrical member (121), the second axial plate (1234) is located on the side of the first axial plate (1233) that is close to the guide member (122). The silencing cavity includes a second silencing cavity (10e). The inner circumferential plate (1231), the outer circumferential plate (1232), the first axial plate (1233) and the second axial plate (1234) are together arranged to form the second silencing cavity (10e). The second axial plate (1234) is provided with a second sound-permeable hole (123a).

2. The vacuum cleaner according to claim 1, characterized in that, The airflow channel (10c) is filled with a resistive material; and / or, the silencing cavity is filled with a resistive material.

3. The vacuum cleaner according to claim 1, characterized in that, The silencing cavity includes a first silencing cavity (10d), the internal space of the cylindrical member (121) forms the first silencing cavity (10d), and the cylindrical member (121) has a first sound-permeable hole (121a) on the side of the cylindrical wall facing the motor; the annular member (123) is located on the side of the guide member (122) close to the motor, the annular member (123) and the guide member (122) are axially spaced, and the space enclosed by the cylindrical member (121), the annular member (123) and the guide member (122) together form at least a part of the airflow channel (10c); the annular member (123) has an overflow port (12a) at the part corresponding to the air inlet (10a); the cylinder (11) has an air outlet (10b) at the part between the annular member (123) and the guide member (122).

4. The vacuum cleaner according to claim 3, characterized in that, The outer diameter of the cylindrical component (121) is smaller than the aperture of the flow port (12a), and the cylindrical component (121) extends into the flow port (12a) from the side of the cylindrical wall facing the motor.

5. The vacuum cleaner according to claim 3, characterized in that, The silencing cavity includes a third silencing cavity (10f), and the flow guide (122) includes a first mounting plate (1221) and a second mounting plate (1222). The first mounting plate (1221) and the second mounting plate (1222) are axially spaced to form a first space (122b). The first space (122b) is open on the side radially away from the cylinder (11) to form a placement port. The cylinder (11) closes the placement port and makes the first space (122b) form the third silencing cavity (10f). The first mounting plate (1221) is located on the side of the second mounting plate (1222) facing the annular member (123). The first mounting plate (1221) is provided with a third sound-permeable hole (122a).

6. The vacuum cleaner according to claim 3, characterized in that, The silencing cavity includes a fourth silencing cavity (10g). The cylinder (11) includes a cylinder body (111) and a sealing plate (112). The cylinder body (111) is cylindrical. The sealing plate (112) is connected to the inner wall of the cylinder body (111) and extends radially. The sealing plate (112) is located on the side of the guide member (122) near the motor. The air inlet (10a) is disposed on the sealing plate (112). The cylinder body (111), the sealing plate (112), and the annular member (123) surround to form the fourth silencing cavity (10g). The sealing plate (112) is provided with a fourth sound-permeable hole (112a).

7. The vacuum cleaner according to claim 6, characterized in that, The sealing plate (112) has a plurality of axially extending positioning posts (1121) on the side opposite to the flow guiding unit (12), and the positioning posts (1121) are circumferentially spaced at the edge of the air inlet (10a).

8. The vacuum cleaner according to claim 6, characterized in that, The inner wall of the cylinder (111) is provided with a radially protruding positioning protrusion (1112), which extends axially. The flow guiding unit (12) is provided with a positioning groove (12b) along its radial edge, and the positioning protrusion (1112) is inserted into the positioning groove (12b) axially.

9. The vacuum cleaner according to claim 8, characterized in that, A portion of the cylindrical body (111) is recessed inward to form the positioning protrusion (1112). A groove (111a) is formed on the circumferential outer surface of the cylindrical body (111). The groove (111a) extends to the edge of the cylindrical body (111) away from the sealing plate (112). The end of the groove (111a) near the sealing plate (112) is a blind end. The sealing plate (112) is provided with a plurality of connecting posts (1113) on the side facing the motor. The connecting posts (1113) are provided with connecting through holes (111b) communicating with the groove (111a).

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