Power device and surface cleaning equipment

Abstract

The utility model relates to a power device and surface cleaning equipment, and the power device comprises a motor which is used for outputting rotation driving force; the air outlet bracket is arranged around the motor; an annular channel is formed between the circumferential inner wall of the shell and the circumferential outer wall of the air outlet bracket; the silencing part is arranged in the annular channel; the air outlet support is provided with at least one second air outlet, the shell is provided with at least one third air outlet, and the second air outlets and the third air outlets are arranged in a staggered mode in the circumferential direction of the motor and communicate with each other through silencing pieces. Air flow formed by the motor penetrates through the air outlet support, enters the annular channel through the second air outlet, flows to the third air outlet after passing through the silencing piece and is exhausted. According to the power device, the annular channel is arranged between the shell of the power device and the air outlet support, the silencing piece is arranged in the annular channel, and the position relation between the second air outlet of the air outlet support and the third air outlet of the shell is optimized, so that the noise reduction effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to surface cleaning equipment technical field, in particular to a kind of power device and surface cleaning equipment. BACKGROUND

[0002] The existing scrubber, main motor noise is large when operating, noise is mainly derived from the noise generated by main motor operation due to vibration and the noise generated when its internal airflow flows, in some places that need to be quiet, noise is large and can bring uncomfortable experience to user, in prior art, main motor is usually damped to realize noise reduction, and due to the limitation of internal space of scrubber, damping effect is limited, and there is still the problem of poor noise reduction effect. SUMMARY

[0003] Based on the above defects in the prior art, the purpose of the utility model is to provide a kind of power device, annular passage is configured between the shell of power device and air outlet support, sound attenuation piece is configured in annular passage, and the positional relationship of the second air outlet of air outlet support and the third air outlet of shell is optimized to improve the effect of noise reduction.

[0004] Therefore, the utility model provides the following technical scheme.

[0005] The utility model provides a kind of power device, the power device includes:

[0006] Motor, to output rotary driving force;

[0007] Air outlet support, it is arranged around the motor;

[0008] Shell, to constitute the outer contour structure of the power device, annular passage is formed between the circumferential inner wall of the shell and the circumferential outer wall of the air outlet support;

[0009] Sound attenuation piece, it is located in the annular passage;

[0010] Wherein, the air outlet support is provided with at least one second air outlet, the shell is provided with at least one third air outlet, the second air outlet and the third air outlet are staggered in the circumferential direction of the motor, and the second air outlet and the third air outlet are communicated by the sound attenuation piece;

[0011] The airflow formed by the motor passes through the air outlet support, enters the annular passage via the second air outlet, and flows to the third air outlet and is discharged after passing through the sound attenuation piece.

[0012] Based on the limitation of power device structure space, when the motor is currently noise-reduced, due to limited space, the device setting mode for noise reduction is also limited, resulting in poor motor noise reduction effect.

[0013] Based on this, the power device of the application prolongs the airflow flow path by arranging an annular channel between the circumferential inner wall of the shell and the circumferential outer wall of the air outlet support, thereby reducing the noise generated by airflow flow. In addition, a sound attenuation member is arranged in the annular channel, and the airflow flow in the annular channel is attenuated by the sound attenuation member. Further, the second air outlet on the air outlet support and the third air outlet on the shell are staggered, so that the airflow flowing out of the second air outlet cannot be directly discharged to the outside of the shell after flowing through the sound attenuation member. It needs to circulate around the air outlet support for a distance and then reach the third air outlet on the shell before it can be discharged to the outside of the shell through the third air outlet. This way not only can further lengthen the flow path of the airflow in the annular channel, but also can further increase the flow path and flow time of the gas in the sound attenuation member. This is conducive to the full contact of the airflow in the annular channel with the sound attenuation member, thereby significantly improving the noise reduction effect on the motor.

[0014] Optionally, the number of the second air outlets is two, and the two second air outlets are opposite to each other in position.

[0015] The number of the third air outlets is two, and the two third air outlets are opposite to each other in position.

[0016] The two second air outlets and the two third air outlets are staggered.

[0017] The above scheme optimizes the number and position of the second air outlets and the third air outlets, which is conducive to prolonging the airflow flow path in the annular channel and making the air outlet of the air outlet support and the shell more uniform, thereby reducing airflow turbulence and avoiding noise increase caused by turbulence.

[0018] Optionally, the second air outlet is an axisymmetric structure and has a first symmetry axis, and the first symmetry axis and the central axis of the motor form a first plane.

[0019] The third air outlet is an axisymmetric structure and has a second symmetry axis, and the second symmetry axis and the central axis of the motor form a second plane, and the included angle between the first plane and the second plane is 60-120°.

[0020] The above scheme can ensure that there is enough spacing between the second air outlet and the third air outlet, so that the airflow does not pass through the second air outlet and the third air outlet too quickly, thereby affecting the noise reduction effect.

[0021] Optionally, the second air outlet includes a plurality of second air holes, and the length of the second air holes extends along the circumference of the motor; the third air outlet includes a plurality of third air holes, and the length of the third air holes extends along the axis of the motor.

[0022] The second air outlet is configured to include a plurality of second air holes, and the third air outlet is configured to include a plurality of third air holes, which helps to reduce the area of a single opening, avoids the area of a single opening being too large, and prevents the air from flowing out too fast and generating loud noise. In addition, by limiting the length extension direction of the second air holes, the airflow can flow along the annular channel after passing through the second air holes, thereby prolonging the flow path. By limiting the length extension direction of the third air holes, the strength of the shell in the height direction (i.e., the axial direction of the motor) is less affected, which helps to improve the structural stability of the power device when applied to the scrubber.

[0023] Optionally, the second air outlet includes a first air outlet portion and two second air outlet portions arranged at intervals, and the two second air outlet portions are respectively located on the circumferential two sides of the first air outlet portion. The total air outlet area of the first air outlet portion is greater than the total air outlet area of the second air outlet portion.

[0024] The above scheme, by arranging the second air outlet as a first air outlet portion and a second air outlet portion arranged at intervals, avoids the airflow being concentrated and discharged from the first air outlet portion, which causes the airflow to collide and generate noise and hinders the airflow. By arranging the second air outlet portion, the airflow is dispersed, thereby ensuring smooth airflow of the second air outlet and further reducing the noise generated when the second air outlet discharges air.

[0025] Optionally, the air outlet support includes a first annular wall and a second annular wall, the second annular wall is arranged around the first annular wall, and an annular mounting cavity is formed between the two annular walls. The mounting cavity is used to mount the filter element.

[0026] The first annular wall is provided with at least one first air outlet, and the second air outlet is arranged on the second annular wall. The first air outlet and the second air outlet are in communication through the filter element.

[0027] The above scheme, the air outlet support is provided with an annular mounting cavity for mounting the filter element, which simplifies the installation of the filter element. During the outward flow of the airflow around the motor, the airflow enters the mounting cavity through the first air outlet, and then flows around the outer periphery of the motor in the mounting cavity. On the one hand, the flow path of the airflow is prolonged to reduce the noise generated when the airflow passes through the air outlet support. On the other hand, the contact time of the airflow with the filter element is increased to improve the filtering effect. After the airflow passes through the filter element, it enters the annular channel through the second air outlet of the air outlet support. The airflow flows around the outer periphery of the motor in the annular channel, and then passes through the silencer and the shell before being discharged. That is, the present scheme prolongs the flow path of the airflow as much as possible in the limited space inside the power device by arranging the annular mounting cavity and the annular channel, thereby improving the noise reduction effect.

[0028] Optionally, the first air outlet comprises a plurality of first air outlet holes, and the second air outlet comprises a plurality of second air outlet holes; the first air outlet holes and the second air outlet holes are arranged in a radial direction of the motor.

[0029] The above scheme optimizes the positional relationship between the first air outlet holes and the second air outlet holes, so that the airflow around the motor is prevented from directly flowing out of the second air outlet holes after entering the installation cavity from the first air outlet holes. The scheme can make the airflow flow in the installation cavity for a distance, thereby prolonging the airflow flow path and achieving the noise reduction effect.

[0030] Optionally, all the first air outlet holes are arranged in a circumferential array along the circumference of the first annular wall.

[0031] The above scheme is beneficial to the uniform entry of the airflow around the motor into the installation cavity.

[0032] Optionally, the first air outlet and the second air outlet are arranged in a circumferential direction of the motor.

[0033] The above scheme optimizes the positional relationship between the first air outlet holes and the second air outlet holes, so that the airflow flow time in the installation cavity is appropriately prolonged, thereby achieving a certain noise reduction effect.

[0034] Optionally, the number of the first air outlets is two, and the two first air outlets are opposite to each other; the number of the second air outlets is two, and the two second air outlets are opposite to each other.

[0035] The above scheme optimizes the number and position of the first air outlet holes and the second air outlet holes, which is beneficial to prolonging the airflow flow path in the installation cavity and making the air outlet of the first annular wall and the second annular wall of the air outlet support more uniform, thereby reducing airflow turbulence and avoiding noise increase caused by turbulence.

[0036] Optionally, the first air outlet has a third axis of symmetry, and the third axis of symmetry and the central axis of the motor form a third plane.

[0037] The second air outlet has a first axis of symmetry, and the first axis of symmetry and the central axis of the motor form a first plane, and the included angle between the first plane and the third plane is 60-120°.

[0038] The above scheme can ensure that there is sufficient spacing between the first air outlet and the second air outlet, so that the airflow does not pass through the first air outlet and the second air outlet too quickly, thereby affecting the noise reduction effect.

[0039] Optionally, the length of the first air outlet hole extends along the axial direction of the motor; in this way, the air flow around the motor can quickly enter the mounting cavity of the air outlet support, thereby ensuring that the power device can form a high-speed air flow.

[0040] And / or, the length of the second air outlet hole extends along the circumferential direction of the motor; in this way, the air flow can flow along the annular channel after passing through the second air outlet hole, thereby prolonging the flow path.

[0041] And / or, the filter element is annular and arranged around the motor; in this way, the filtering effect can be ensured.

[0042] Optionally, the sound-absorbing member is annular and circumferentially wrapped around the outer wall of the air outlet support; in this way, the noise reduction effect of the sound-absorbing member can be improved, and the air flow in the annular channel can be fully contacted with the sound-absorbing member.

[0043] And / or, the motor is provided with a first damping element and a second damping element at both axial ends thereof; in this way, the vibration generated when the motor operates can be effectively reduced, thereby reducing the noise caused by the vibration.

[0044] And / or, the air outlet support is provided with a first end portion, the first end portion constitutes part of the outer contour structure of the power device, and the first end portion is provided with an air inlet through which the external air flow enters the power device; in this way, by limiting the air inlet to be located on the first end portion of the air outlet support, the interference between the inlet air flow and the outlet air flow on the shell can be reduced.

[0045] The utility model also provides a surface cleaning device, the surface cleaning device includes the power device as any one of the above, the power device is used to form air flow flow power.

[0046] The utility model has the following technical effects:

[0047] The utility model provides a kind of power device, the power device of the application is configured annular passage between the circumferential inner wall of shell and the circumferential outer wall of air outlet support, to extend airflow flow path, and then reduce the noise generated by airflow flow. In addition, configure sound attenuation piece in annular passage, airflow flow in annular passage is carried out noise reduction by sound attenuation piece, further, the application is staggered by the second air outlet on air outlet support and the third air outlet on shell, so that the airflow that flows out from second air outlet cannot be directly discharged to the outside of shell after flowing through sound attenuation piece, it needs to be wound air outlet support circumferential distance until reaching the third air outlet on shell, and then can be discharged to the outside of shell by third air outlet;This way not only can further lengthen the flow path of airflow in annular passage, but also can further increase the flow path and flow duration of gas in sound attenuation piece;Then it is beneficial to the airflow in annular passage and sound attenuation piece fully contact, so that the noise reduction effect on motor can be obviously improved. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is the structure sectional view of power device in the first embodiment of the utility model;

[0049] Figure 2 It is the structure sectional view of power device without installing filter element and sound attenuation piece in the first embodiment of the utility model;

[0050] Figure 3 It is the structure explosion drawing of power device in the first embodiment of the utility model;

[0051] Figure 4 It is the three-dimensional structure schematic diagram of air outlet support in the first embodiment of the utility model Figure 1 ;

[0052] Figure 5 It is the three-dimensional structure schematic diagram of air outlet support in the first embodiment of the utility model Figure 2 ;

[0053] Figure 6 It is the three-dimensional structure schematic diagram of shell of the utility model;

[0054] Figure 7 It is the three-dimensional structure schematic diagram of power device of the utility model;

[0055] Figure 8 It is the three-dimensional structure schematic diagram of power device in the second embodiment of the utility model.

[0056] REFERENCE SIGNS

[0057] 100, power device;

[0058] 1, motor;

[0059] 2, air outlet support; 21, mounting cavity; 22, first annular wall; 221, first air outlet; 2211, first air outlet hole; 23, second annular wall; 231, second air outlet; 2311, second air outlet hole; 2312, first air outlet part; 2313, second air outlet part; 24, first end part; 241, air inlet;

[0060] 3, filter element;

[0061] 4, housing; 41, third air outlet; 411, third air outlet hole;

[0062] 5, annular channel;

[0063] 6, sound-absorbing member;

[0064] 71, first damping element; 72, second damping element. DETAILED DESCRIPTION

[0065] In order to make the technical scheme and beneficial effects of the utility model more obvious and easy to understand, the following will be described in detail by enumerating specific embodiments. Unless otherwise defined, the technical and scientific terms used in this paper have the same meaning as the technical and scientific terms in the technical field to which this application belongs.

[0066] In the description of the utility model, unless otherwise explicitly defined, the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of the simplified description of the utility model, and does not indicate that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, that is, it cannot be understood as a limitation on the utility model.

[0067] In the utility model, the terms "first" and "second" are only used for the purpose of clear description, and cannot be understood as the relative importance of the indicated characteristics or the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two; the meaning of "several" is at least one; except for the explicit definition.

[0068] In the utility model, unless another definite limitation, the terms "mount", "connect", "fix", "set" and the like should be understood in broad sense. For example, "connect" can be fixed connection, detachable connection or integral molding, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirect connection through intermediate medium, also can be the communication or interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0069] In the utility model, unless another definite limitation, the first feature is "on", "over", "above" and "top" of the second feature, "under", "below" or "bottom" of the second feature can be direct contact of the first feature and the second feature, or indirect contact of the first feature and the second feature through intermediate medium. Moreover, the first feature is "over", "above" and "top" of the second feature can be directly above or obliquely above the first feature, or just indicate that the horizontal height of the first feature is higher than the horizontal height of the second feature. The first feature is "under", "below" and "bottom" of the second feature can be directly below or obliquely below the first feature, or just indicate that the horizontal height of the first feature is less than the horizontal height of the second feature.

[0070] The utility model is described in detail below Figures 1 to 8 The power device of the utility model is described in detail.

[0071] In the embodiment, as shown in Figures 1 to 3 The power device 100 for surface cleaning equipment (such as scrubber) includes motor 1, air outlet support 2, shell 4 and silencer 6, motor 1 is used to output rotary driving force, the output end of motor 1 is connected with impeller, when motor 1 rotates, will drive impeller to rotate, thereby forming the power of airflow flow. Air outlet support 2 is arranged around motor 1, air outlet support 2 is equipped with at least one second air outlet 231, shell 4 is used to constitute the outer contour structure of power device 100, the circumferential inner wall between shell 4 and the circumferential outer wall of air outlet support 2 forms annular channel 5, silencer 6 is arranged in annular channel 5, shell 4 is equipped with at least one third air outlet 41. Wherein, air outlet support 2 and shell 4 can be two components, can also be integral molding structure.

[0072] Second air outlet 231 and third air outlet 41 are communicated through silencer 6, so that the airflow around motor 1 enters annular channel 5 through second air outlet 231, and the airflow in annular channel 5 must pass through silencer 6 to flow to third air outlet 41, and then is discharged through third air outlet 41, to ensure that silencer 6 plays an effective noise reduction effect. In addition, as shown in Figure 3As shown, the second air outlet 231 and the third air outlet 41 are staggered in the circumferential direction of the motor 1, so as to prolong the distance between the second air outlet 231 and the third air outlet 41, to avoid the air flow entering the annular channel 5 from the second air outlet 231 directly passing through the third air outlet 41 and being discharged, thereby causing noise to increase, that is, by optimizing the positional relationship between the second air outlet 231 and the third air outlet 41, the air flow in the annular channel 5 is beneficial to flow along the annular channel 5, thereby playing a noise reduction role. It should be explained that the second air outlet 231 and the third air outlet 41 are staggered in the circumferential direction of the motor 1, that is, the central parts of the second air outlet 231 and the third air outlet 41 are staggered in the circumferential direction of the motor 1, and the positional relationship between other parts of the second air outlet 231 and other parts of the third air outlet 41 can be that they are opposite in part in the radial direction of the motor 1, or the second air outlet 231 and the third air outlet 41 are completely staggered in the circumferential direction of the motor 1.

[0073] Based on the limitation of the structure space of the power device, at present, when the motor is noise-reduced, due to the limited space, the arrangement mode of the device for noise reduction is also limited, resulting in poor noise reduction effect of the motor.

[0074] Based on this, the power device of the present application is configured with an annular channel 5 between the circumferential inner wall of the shell 4 and the circumferential outer wall of the air outlet support 2, to prolong the air flow path, thereby reducing the noise generated by the air flow. In addition, the sound-absorbing member 6 is arranged in the annular channel 5, the air flow in the annular channel 5 is noise-reduced by the sound-absorbing member 6, and the annular channel 5 prolongs the air flow path, so that the air flow in the annular channel 5 increases the flow time, further, the second air outlet 231 on the air outlet support 2 and the third air outlet 41 on the shell 4 are staggered, so that the air flow from the second air outlet 231 cannot be directly discharged to the outside of the shell 4 after flowing through the sound-absorbing member 6, it needs to be wound around the air outlet support 231 for a distance in the circumferential direction and then reach the third air outlet 41 on the shell before it can be discharged to the outside of the shell 4 through the third air outlet 231; this way not only can further lengthen the flow path of the air flow in the annular channel 5, but also can further increase the flow path and flow time of the air flow in the sound-absorbing member 6, thereby facilitating the air flow in the annular channel 5 to fully contact the sound-absorbing member 6, so as to obviously improve the noise reduction effect of the motor.

[0075] In an embodiment, as shown in Figure 3As shown, the second air outlet 231 and the third air outlet 41 are arranged at intervals in the circumferential direction of the motor 1 to further lengthen the distance between the second air outlet 231 and the third air outlet 41 and lengthen the airflow flow path in the annular channel 5. It should be explained that the second air outlet 231 and the third air outlet 41 are arranged at intervals in the circumferential direction of the motor 1 means that the second air outlet 231 and the third air outlet 41 are completely staggered in the circumferential direction of the motor 1 and have a distance therebetween.

[0076] In an embodiment, as shown in Figures 3 to 6 the number of second air outlets 231 is multiple, the number of third air outlets 41 is multiple, and the second air outlets 231 and the third air outlets 41 are alternately and equally spaced in the circumferential direction of the motor 1, so that the air outlet speed can be ensured while the noise reduction effect is ensured, and the cleaning efficiency of the surface cleaning device is not affected due to the optimization of the noise reduction effect.

[0077] In an embodiment, as shown in Figures 3 to 6 the number of second air outlets 231 is two, and the two second air outlets 231 are opposite to each other, the number of third air outlets 41 is two, and the two third air outlets 41 are opposite to each other, and the two second air outlets 231 and the two third air outlets 41 are staggered. Specifically, since the size of the power device 100 is limited by the internal space of the surface cleaning device, the size of the power device 100 cannot be too large, and thus the circumferential surface size of the second annular wall 23 and the shell 4 is limited. Therefore, the number of second air outlets 231 and third air outlets 41 is configured to be two in this scheme, which can improve the air outlet speed, on the one hand, avoid the total area ratio of the holes on the second annular wall 23 being too large, causing the airflow to be too fast to be discharged from the second air outlet 231, and on the other hand, avoid the total area ratio of the holes on the shell 4 being too large, causing the airflow to be unable to stay in the annular channel 5 after entering the annular channel 5 from the second air outlet 231, but directly discharged from the third air outlet 41, which ultimately shortens the airflow flow path and causes the noise to increase. In addition, the two second air outlets 231 are opposite to each other, and the two third air outlets 41 are opposite to each other, so that the airflow can enter the annular channel 5 through the two second air outlets 231, making the air outlet of the second annular wall 23 more uniform, and the airflow in the annular channel 5 can be discharged from the shell 4 through the two third air outlets 41, making the air outlet of the shell 4 more uniform, which is beneficial to reduce airflow turbulence and avoid turbulence causing noise increase. In addition, the two second air outlets 231 and the two third air outlets 41 are staggered, which can ensure a certain distance between the second air outlet 231 and the third air outlet 41 to effectively lengthen the airflow flow path.

[0078] Further, the second air outlet 231 is an axisymmetric structure and has a first symmetry axis, i.e., the second air outlet 231 is symmetric about the first symmetry axis, and the first symmetry axis and the central axis of the motor 1 form a first plane; the third air outlet 41 is an axisymmetric structure and has a second symmetry axis, i.e., the third air outlet 41 is symmetric about the second symmetry axis, and the second symmetry axis and the central axis of the motor 1 form a second plane, and the included angle between the first plane and the second plane is 60-120°, so as to ensure that the second air outlet 231 and the third air outlet 41 have sufficient spacing, so as to avoid that the air flow passes through the second air outlet 231 and the third air outlet 41 too fast, thereby affecting the noise reduction effect. Preferably, as shown in Figure 3 the second air outlet 231 and the third air outlet 41 are arranged at an interval of 90° in the circumferential direction of the motor 1, i.e., the included angle between the first plane and the second plane is 90°, so that the spacing between any one second air outlet 231 and any one third air outlet 41 adjacent to it is equal, so that the air flow from the second air outlet 231 can be divided into two relatively uniform air flows, which flow to the third air outlets 41 on both sides of the second air outlet 231, and the noise reduction effect is better.

[0079] In an embodiment, as shown in Figures 4 to 6 the second air outlet 231 includes a plurality of second air holes 2311, and the length of the second air hole 2311 extends in the circumferential direction of the motor 1; and the third air outlet 41 includes a plurality of third air holes 411, and the length of the third air hole 411 extends in the axial direction of the motor 1. Specifically, configuring the second air outlet 231 and the third air outlet 41 as a plurality of air holes is beneficial to reduce the area of a single opening, so as to avoid that the area of a single opening is too large, which causes the air to flow out too fast and generate loud noise. In addition, the length of the second air hole 2311 extends in the circumferential direction of the motor 1, so that in the process of passing through the second air hole 2311, the air flow flows along the second air hole 2311 and diffuses in the circumferential direction of the motor 1, which is beneficial to the air flow flowing along the annular channel 5, so as to prolong the flow path. In addition, for the scrubber, the noise mainly comes from the main motor, which is vertically arranged on the handle of the detergent, and the handle is usually kept in an upright state. Of course, when the scrubber is used to clean an area with limited vertical space, the handle tends to lie flat or be in a lying state. In this scheme, the length of the third air hole 411 extends in the axial direction of the motor 1, which has little effect on the strength of the outer shell 4 in the height direction (i.e., the axial direction of the motor 1), and is beneficial to improve the structural stability of the power device 100 when applied to the scrubber.

[0080] Further, as shown in Figures 3 to 5As shown, the second air outlet 231 includes a first air outlet portion 2312 and two second air outlet portions 2313, the two second air outlet portions 2313 are respectively located on the circumferential two sides of the first air outlet portion 2312, and the total air outlet area of the first air outlet portion 2312 is greater than that of the second air outlet portion 2313. In this way, when the second air outlet 231 discharges air into the annular channel 5, most of the airflow enters the annular channel 5 through the first air outlet portion 2312, and a small part of the airflow enters the annular channel 5 through the second air outlet portion 2313. Since the first air outlet portion 2312 and the third air outlet 41 adjacent thereto are far apart, the airflow discharged through the first air outlet portion 2312 can flow as far as possible in the annular channel 5 before being discharged from the third air outlet 41. Although the second air outlet portion 2313 and the third air outlet 41 adjacent thereto are close, the total air outlet area of the second air outlet portion 2313 is small, and the second air outlet portion 2313 and the third air outlet 41 are staggered in the circumferential direction of the motor 1. Therefore, the airflow discharged through the second air outlet portion 2313 can still flow a distance in the annular channel 5 before being discharged from the third air outlet 41, still having a certain noise reduction effect, and can also ensure the air outlet speed. In the present scheme, by arranging the second air outlet 231 into a structure of the first air outlet portion 2312 and the second air outlet portion 2313 distributed at intervals, the airflow is prevented from being concentrated and discharged from the first air outlet portion 2312, which can cause noise and hinder air outlet. By configuring the second air outlet portion 2313, the airflow is dispersed, thereby ensuring smooth air outlet of the second air outlet 231 and further reducing the noise generated when the second air outlet 231 discharges air.

[0081] Further, as shown in Figure 4 and Figure 5 , the second air outlet 231 includes a first air outlet portion 2312 and a second air outlet portion 2313, all the second air outlet holes 2311 included in the first air outlet portion 2312 are arranged in a multi-row and multi-column array, and all the second air outlet holes 2311 included in the second air outlet portion 2313 are arranged in a single column and multi-row. The distance between the first air outlet portion 2312 and the second air outlet portion 2312 is substantially equal to the length of the second air outlet hole 2311, so that the airflow is discharged through the first air outlet portion 2312 as much as possible, and only a small amount of airflow is discharged through the second air outlet portion 2313.

[0082] In an embodiment, as shown in Figures 1 to 5As shown, the air outlet support 2 comprises a first annular wall 22 and a second annular wall 23, the second annular wall 23 is arranged around the first annular wall 22 and a mounting cavity 21 in the shape of an annulus is formed between the two, and the filter element 3 is mounted in the mounting cavity 21. The first annular wall 22 is provided with at least one first air outlet 221, and the second annular wall 23 is provided with a second air outlet 231, and the first air outlet 221 and the second air outlet 231 are communicated through the filter element 3. In this scheme, the air outlet support 2 is provided with a mounting cavity 21 in the shape of an annulus for mounting the filter element 3, which simplifies the installation, and during the process of the airflow around the motor 1 flowing outward, after the airflow enters the mounting cavity 21 through the first air outlet 221, the airflow can flow around the outer periphery of the motor 1 in the mounting cavity 21, which can on the one hand extend the airflow flow path to reduce the noise generated when the airflow passes through the air outlet support 2, and on the other hand can improve the time of the airflow contacting the filter element 3 to improve the filtering effect, and after the airflow passes through the filter element 3, the airflow enters the annular channel 5 through the second air outlet 231 of the air outlet support 2, and then flows around the outer periphery of the motor 1 in the annular channel 5, and then is discharged after passing through the silencer 6 and the housing 4. That is, by setting the mounting cavity 21 and the annular channel 5 in the shape of an annulus, the airflow flow path is as long as possible in the limited space inside the power device 100 to improve the noise reduction effect.

[0083] In an embodiment, as shown in Figure 4 and Figure 5 , the first air outlet 221 comprises a plurality of first air outlet holes 2211, and the second air outlet 231 comprises a plurality of second air outlet holes 2311; the first air outlet hole 2211 and the second air outlet hole 2311 are arranged in the radial direction of the motor 1, so as to avoid the airflow around the motor 1 entering the mounting cavity 21 from the first air outlet hole 2211 and directly discharging from the second air outlet hole 2311, so that the airflow can flow for a distance in the mounting cavity 21, and the airflow flow path is extended to play a noise reduction role. In a specific embodiment, the first air outlet hole 2311 is a long hole extending in the axial direction of the motor 1, and the second air outlet hole 2311 is a long hole extending in the circumferential direction of the motor 1, and the first air outlet hole 2211 and the second air outlet hole 2311 are arranged in the radial direction of the motor 1. The center of the first air outlet hole 2211 and the center of the second air outlet hole 2311 are not opposite in the radial direction of the motor 1.

[0084] Further, as shown in Figure 4 and Figure 5 , all the first air outlet holes 2211 are arranged in a circumferential array along the circumferential direction of the first annular wall 22. Specifically, when the motor 1 operates, a relatively large airflow will be generated around the motor 1, and the circumferential array arrangement of the first air outlet holes 2211 is conducive to the uniform entry of the airflow around the motor 1 into the mounting cavity 21.

[0085] Of course, the arrangement of the first air outlet 221 is not limited to the above scheme. In another embodiment, such as... Figure 8 As shown, the first air outlet 221 and the second air outlet 231 are offset in the circumferential direction of the motor 1. The first air outlet 221 and the second air outlet 231 cooperate to appropriately prolong the flow time of the airflow in the mounting cavity 21, thereby playing a certain role in noise reduction.

[0086] Furthermore, such as Figure 8 As shown, there are two first air outlets 221, and the two first air outlets 221 are positioned opposite each other; there are also two second air outlets 231, and the two second air outlets 231 are positioned opposite each other. Specifically, since the size of the power unit 100 is limited by the internal space of the surface cleaning equipment, the size of the power unit 100 cannot be too large. Consequently, the circumferential surface dimensions of the first annular wall 22 and the second annular wall 23 are also limited. Therefore, this solution configures the number of both the first air outlet 221 and the second air outlet 231 to be two. This not only increases the airflow speed but also avoids the adverse effects of excessively large total opening area of ​​the first annular wall 22 and the second annular wall 23, which would cause the first air outlet 221 and the second air outlet 231 to exhaust too quickly, resulting in a shortened airflow path and increased noise. In addition, the two first air outlets 221 are positioned opposite each other, and the two second air outlets 231 are positioned opposite each other. The airflow around the motor 1 can enter the mounting cavity 21 through the two first air outlets 221 respectively, and the airflow in the mounting cavity 21 can enter the annular channel 5 through the two second air outlets 231 respectively. The airflow from the first annular wall 22 and the second annular wall 23 is more uniform, which helps to reduce airflow turbulence and avoid noise increase caused by turbulence.

[0087] Furthermore, the first air outlet 221 has an axisymmetric structure and a third axis of symmetry, meaning that the first air outlet 221 itself is axisymmetric about the third axis of symmetry, and the third axis of symmetry and the central axis of the motor 1 form a third plane; the second air outlet 231 has an axisymmetric structure and a first axis of symmetry, and the first axis of symmetry and the central axis of the motor 1 form a first plane. The angle between the first plane and the third plane is 60-120° to ensure sufficient spacing between the first air outlet 221 and the second air outlet 231, preventing airflow from passing through the first air outlet 221 and the second air outlet 231 too quickly in sequence, thus affecting the noise reduction effect. Preferably, as follows... Figure 8As shown, the first air outlet 221 and the second air outlet 231 are arranged at an interval of 90° in the circumferential direction of the motor 1, that is, the included angle between the first plane and the third plane is 90°, so that the distance between any one of the first air outlet 221 and any one of the second air outlet 231 adjacent thereto is equal, and the airflow from the first air outlet 221 can be divided into two relatively uniform airflows, which flow to the second air outlets 231 on both sides of the first air outlet 221, respectively, so that the noise reduction effect is better.

[0088] In an embodiment, as shown in Figure 4 and Figure 5 , the length of the first air outlet hole 2211 extends in the axial direction of the motor 1, and the extension length of the first air outlet hole 2211 is as equal as possible to the axial length of the motor 1, so as to ensure that the airflow around the motor 1 can quickly enter the mounting cavity 21 of the air outlet support 2, thereby ensuring that the power device 100 can form a relatively high-speed airflow.

[0089] In an embodiment, as shown in Figure 1 and Figure 3 , the filter element 3 is annular, and the filter element 3 is arranged around the motor 1 to ensure the filtering effect.

[0090] In an embodiment, as shown in Figure 1 and Figure 3 , the sound-absorbing member 6 is annular, and the sound-absorbing member 6 circumferentially wraps the outer wall of the air outlet support 2 to improve the noise reduction effect of the sound-absorbing member 6 and ensure that the airflow in the annular channel 5 can fully contact the sound-absorbing member 6.

[0091] In an embodiment, as shown in Figures 1 to 3 , the motor 1 is respectively provided with a first damping element 71 and a second damping element 72 at both axial ends, and the first damping element 71 and the second damping element 72 are configured to effectively reduce the vibration sensation generated when the motor 1 operates, thereby reducing the noise caused by vibration.

[0092] In an embodiment, as shown in Figure 1 , Figure 2 , Figure 4 and Figure 7 , the air outlet support 2 is provided with a first end portion 24, the first end portion 24 constitutes part of the outer contour structure of the power device 100, the first end portion 24 is provided with an air inlet 241, and the external airflow enters the power device 100 through the air inlet 241 to reduce the interference between the inlet airflow and the outlet airflow on the shell. Further, the air inlet 241 is located at the bottom of the air outlet support 2.

[0093] The utility model also provides a kind of surface cleaning equipment (not shown in drawing) and, such as scrubber, surface cleaning equipment includes as operating handle power device 100, power device 100 is vertically installed on operating handle.

[0094] It should be understood that the above examples are exemplary and are not intended to encompass all possible implementations encompassed by the claims. Various modifications and changes can also be made on the basis of the above examples without departing from the scope of the disclosure. Similarly, any combination of the technical features of the above examples can also be made to form additional embodiments of the utility model that can not be explicitly described. Therefore, the above examples only express several implementation manners of the utility model, and do not limit the protection scope of the utility model patent.

Claims

1. A power plant, characterized in that The power device (100) comprises: a motor (1) configured to output a rotating driving force; an air outlet support (2) arranged around the motor (1); an outer shell (4) configured to form an outer contour structure of the power device (100), a circumferential inner wall of the outer shell (4) and a circumferential outer wall of the air outlet support (2) forming an annular channel (5); a sound attenuation member (6) arranged in the annular channel (5); wherein the air outlet support (2) is provided with at least one second air outlet (231), the outer shell (4) is provided with at least one third air outlet (41), the second air outlet (231) and the third air outlet (41) are arranged alternately in the circumferential direction of the motor (1), and the second air outlet (231) and the third air outlet (41) are in communication through the sound attenuation member (6); air flow formed by the motor (1) passes through the air outlet support (2), enters the annular channel (5) through the second air outlet (231), and flows to the third air outlet (41) and is discharged after passing through the sound attenuation member (6).

2. The power plant of claim 1, wherein The number of the second air outlets (231) is two, and the two second air outlets (231) are opposite to each other; The number of the third air outlets (41) is two, and the two third air outlets (41) are opposite to each other; The two second air outlets (231) and the two third air outlets (41) are arranged alternately.

3. The power plant of claim 2, wherein, The second air outlet (231) is an axisymmetric structure and has a first symmetry axis, and the first symmetry axis and the central axis of the motor (1) form a first plane; The third air outlet (41) is an axisymmetric structure and has a second symmetry axis, and the second symmetry axis and the central axis of the motor (1) form a second plane, and the included angle between the first plane and the second plane is 60-120°.

4. The power plant according to any one of claims 1 to 3, characterized in that The second air outlet (231) comprises a plurality of second air outlet holes (2311), and the length of the second air outlet hole (2311) extends in the circumferential direction of the motor (1); the third air outlet (41) comprises a plurality of third air outlet holes (411), and the length of the third air outlet hole (411) extends in the axial direction of the motor (1).

5. The power plant of claim 4, wherein, The second air outlet (231) comprises a first air outlet part (2312) and two second air outlet parts (2313) arranged at intervals, the two second air outlet parts (2313) are respectively located on the two sides of the first air outlet part (2312) in the circumferential direction, and the total air outlet area of the first air outlet part (2312) is greater than that of the second air outlet part (2313).

6. The power plant of claim 1, wherein The air outlet support (2) comprises a first annular wall (22) and a second annular wall (23), the second annular wall (23) is arranged around the first annular wall (22) and forms an annular mounting cavity (21) therebetween, and the mounting cavity (21) is configured to mount a filter element (3); The first ring wall (22) is provided with at least one first air outlet (221), and a second air outlet (231) is arranged on the second ring wall (23), and the first air outlet (221) and the second air outlet (231) are communicated through the filter element (3).

7. The power plant of claim 6, wherein The first air outlet (221) comprises a plurality of first air outlet holes (2211), and the second air outlet (231) comprises a plurality of second air outlet holes (2311); the first air outlet holes (2211) and the second air outlet holes (2311) are arranged in a radial direction of the motor (1).

8. The power plant of claim 7, wherein, All the first air outlet holes (2211) are arranged in a circumferential array along a circumference of the first ring wall (22).

9. The power plant of claim 6, wherein, The first air outlet (221) and the second air outlet (231) are arranged in a circumferential direction of the motor (1).

10. The power plant of claim 9, wherein, The number of the first air outlets (221) is two, and the two first air outlets (221) are opposite to each other; the number of the second air outlets (231) is two, and the two second air outlets (231) are opposite to each other.

11. The power plant of claim 10, wherein, The first air outlet (221) is an axisymmetric structure and has a third symmetry axis, and the third symmetry axis and a central axis of the motor (1) form a third plane; The second air outlet (231) is an axisymmetric structure and has a first symmetry axis, and the first symmetry axis and the central axis of the motor (1) form a first plane, and an included angle between the first plane and the third plane is 60-120°.

12. The power plant of claim 7, wherein, The length of the first air outlet hole (2211) extends in an axial direction of the motor (1); And / or, the length of the second air outlet hole (2311) extends in a circumferential direction of the motor (1); And / or, the filter element (3) is annular and surrounds the motor (1).

13. The power plant of any one of claims 1-3, wherein, The sound attenuation member (6) is annular, and the sound attenuation member (6) circumferentially wraps an outer wall of the air outlet support (2); And / or, the motor (1) is respectively provided with a first damping element (71) and a second damping element (72) at two axial ends thereof; And / or, the air outlet support (2) is provided with a first end portion (24), the first end portion (24) forms part of an outer contour structure of the power device (100), and the first end portion (24) is provided with an air inlet (241), and external airflow enters the power device (100) through the air inlet (241).

14. A surface cleaning apparatus characterized by, The surface cleaning device comprises the power device (100) as claimed in any one of claims 1-13, and the power device (100) is used to form airflow flow power.

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