Power unit of a cleaning device and cleaning device

Abstract

The application provides a power device of a cleaning equipment and the cleaning equipment, and the power device of the cleaning equipment comprises: a first shell with an inner chamber with an open top and an outer chamber, the inner chamber is provided with an air inlet, and the outer chamber is provided with an air outlet channel; a second shell comprising a cylindrical part and a partition part fixed in the cylindrical part, one end of the cylindrical part is in butt joint with the opening at the top of the inner chamber, the partition part is provided with a plurality of pressure equalizing holes in annular distribution, and the partition part divides the space in the cylindrical part into a first pressure equalizing chamber and a second pressure equalizing chamber; a third shell is arranged above the second shell and is in butt joint with the opening at the top of the outer chamber, a sandwich chamber is formed between the third shell and the outer side of the cylindrical part; a fan assembly is partially located in the inner chamber and partially located in the second pressure equalizing chamber; and the air inlet is communicated with the air outlet channel through the inner chamber, the second pressure equalizing chamber, the first pressure equalizing chamber, the sandwich chamber and the outer chamber in sequence.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household cleaning appliances, in particular to a power device of a cleaning equipment and the cleaning equipment. BACKGROUND

[0002] With the improvement of living standards, users gradually increase the demand for the convenience of household cleaning equipment. For example, in order to reduce the cleaning burden of floor cleaning work, improve the cleaning efficiency and effect, cleaning equipment such as vacuum cleaner and floor washing machine gradually obtains popular application in family.

[0003] At present, household cleaning equipment such as vacuum cleaner and floor washing machine on the market usually takes high-speed motor as power source to generate high negative pressure to clean the particulate dust on the surface of the ground. When the user uses these equipment, due to the vibration of the motor, the disturbance of the flow channel airflow and other factors, a large noise is generated, which affects the user's experience. SUMMARY

[0004] The present application provides a power device of a cleaning equipment and the cleaning equipment, which solves the defect that the noise is large during the operation of the cleaning equipment in the prior art, and reduces the operation noise of the cleaning equipment.

[0005] The present application provides a power device of a cleaning equipment, comprising: a first shell having an inner chamber and an outer chamber with an open top, the inner chamber is provided with an air inlet, and the outer chamber is provided with an air outlet passage; a second shell comprising a cylindrical portion and a partition portion fixed in the cylindrical portion, one end of the cylindrical portion is in butt joint with the opening at the top of the inner chamber, the partition portion is provided with a plurality of pressure equalizing holes in annular distribution, and the partition portion separates the space in the cylindrical portion into a first pressure equalizing chamber and a second pressure equalizing chamber; a third shell is arranged above the second shell and is in butt joint with the opening at the top of the outer chamber, and a sandwich chamber is formed between the third shell and the outer side surface of the cylindrical portion; a fan assembly, part of which is located in the inner chamber and the rest is located in the second pressure equalizing chamber; the air inlet is communicated with the air outlet passage through the inner chamber, the second pressure equalizing chamber, the first pressure equalizing chamber, the sandwich chamber and the outer chamber in sequence.

[0006] According to the power device of the cleaning equipment provided by the present application, a cylindrical silencer is arranged in the first pressure equalizing chamber, and the silencer is coaxially arranged with the cylindrical portion; an inner silencer chamber is formed in the silencer, and a plurality of silencer holes are uniformly distributed on the outer peripheral wall of the silencer and communicated between the inner and outer silencer chambers.

[0007] Specifically, the present embodiment provides an implementation mode for improving the noise reduction effect by arranging a silencer. When the airflow passes through the outer peripheral wall of the silencer, the silencer holes play a filtering role on the noise in a certain frequency range.

[0008] According to the power device of the cleaning equipment, the third shell and the second shell are provided with a support; the support comprises a tubular part supported between the partition layer part and the top of the third shell, the silencer has a center hole matched with the tubular part, and the silencer is sleeved on the tubular part; the partition layer part has an opening hole opposite to the tubular part, so that the power supply line of the fan assembly can extend to outside the third shell through the tubular part.

[0009] Specifically, the embodiment provides an implementation that the second shell and the third shell are provided with a support, the support can not only provide a supporting effect, but also can arrange the power supply line of the fan assembly through the tubular part.

[0010] According to the power device of the cleaning equipment, the intersection of the outer chamber and the air exhaust channel is provided with sound-absorbing cotton.

[0011] Specifically, the embodiment provides an implementation that the sound-absorbing cotton reduces noise. The sound-absorbing cotton is arranged at the intersection of the outer chamber and the air exhaust channel, so as to absorb noise conducted in air passing through the sound-absorbing cotton.

[0012] According to the power device of the cleaning equipment, one side of the sound-absorbing cotton facing the outer chamber is an arc-shaped surface, and the arc-shaped surface and the outer chamber combine to form an annular air duct structure.

[0013] Specifically, the embodiment provides an implementation of a specific shape of the sound-absorbing cotton. The arc-shaped surface and the outer chamber combine to form an annular air duct structure, so as to reduce the influence of the sound-absorbing cotton on air flow.

[0014] According to the power device of the cleaning equipment, the fan assembly comprises a fan body and a funnel-shaped air guide cover, a bottom of the air guide cover is formed with an air duct inlet opposite to the air inlet; a first damping pad is arranged between the fan body and the partition layer part, and a second damping pad is arranged between the air guide cover and the inner chamber.

[0015] Specifically, the embodiment provides an implementation that the fan body and the air guide cover of the fan assembly are respectively provided with the first damping pad and the second damping pad. Through the first damping pad and the second damping pad, vibration transmission of the fan assembly to the outside in the running process is reduced.

[0016] According to the power device of the cleaning equipment, at least one annular groove is formed on the outer periphery of the first damping pad and / or the second damping pad, so as to form a plurality of damping layers on the outer periphery of the first damping pad and / or the second damping pad.

[0017] Specifically, the embodiment provides a first damping pad and / or a second damping pad formed with an annular groove. The plurality of damping layers of the first damping pad and / or the second damping pad can be compressed by the space of the annular groove to absorb vibration by elastic deformation.

[0018] According to the power device of the cleaning equipment, the second damping pad has a skirt part matched with the shape of the air deflector, the skirt part completely separates the outer surface of the air deflector from the inner surface of the inner chamber, and / or the air inlet of the inner chamber forms a convex structure towards the fan assembly, and the second damping pad forms a concave structure matched with the air inlet on the side close to the air inlet.

[0019] Specifically, the embodiment provides a second damping pad having a skirt part and a second damping pad formed with a concave structure matched with the air inlet. The skirt part separates the air deflector from the inner chamber, so that the air deflector and the inner chamber can be reduced in vibration transmission in each direction based on the elastic deformation of the skirt part; and the cooperation of the convex structure and the concave structure is favorable for the relative position definition of the air deflector and the inner chamber.

[0020] According to the power device of the cleaning equipment, the second damping pad has a skirt part matched with the shape of the air deflector, the skirt part completely separates the outer surface of the air deflector from the inner surface of the inner chamber, and / or the air inlet of the inner chamber forms a convex structure towards the fan assembly, and the second damping pad forms a concave structure matched with the air inlet on the side close to the air inlet.

[0021] Specifically, the embodiment provides a second damping pad having a skirt part and a second damping pad formed with a concave structure matched with the air inlet. The skirt part separates the air deflector from the inner chamber, so that the air deflector and the inner chamber can be reduced in vibration transmission in each direction based on the elastic deformation of the skirt part; and the cooperation of the convex structure and the concave structure is favorable for the relative position definition of the air deflector and the inner chamber.

[0022] The application further provides a cleaning equipment comprising the power device of the cleaning equipment according to any one of the above embodiments.

[0023] The power device and cleaning device of the cleaning equipment provided by the present invention, the power device of the cleaning equipment forms the outer structure of the fan assembly through the first shell, the second shell and the third shell, while playing a role in protecting the fan assembly, forming an air channel composed of an inner chamber, a second pressure equalizing chamber, a first pressure equalizing chamber, an interlayer chamber and an outer chamber. The interlayer portion separates the space in the cylindrical portion into a first pressure equalizing chamber and a second pressure equalizing chamber. During the air flow process, it can only enter the first pressure equalizing chamber from the second pressure equalizing chamber through a plurality of pressure equalizing holes distributed in an annular manner, so that the air is evenly distributed after entering the first pressure equalizing chamber, reducing the pressure difference gradient between the flowing air in all directions, thereby reducing the aerodynamic noise generated by eddy currents and pressure pulsations, and reducing the generation of noise. Moreover, the fan assembly is arranged in the inner chamber and the second pressure equalizing chamber. When the air passes through, it can also perform heat exchange with the running fan assembly to achieve heat dissipation of the fan assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of the power device of the cleaning equipment provided by the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the power device of the cleaning equipment provided by the present invention;

[0027] Figure 3 This is a schematic diagram of the exploded structure of the power device of the cleaning equipment provided by the present invention;

[0028] Figure 4 This is a schematic structural diagram of the third housing of the power device of the cleaning equipment provided by the present invention;

[0029] Figure 5 This is a schematic structural diagram of the second housing of the power device of the cleaning equipment provided by the present invention;

[0030] Figure 6 It is a schematic cross-sectional structural diagram of the second housing of the power device of the cleaning equipment provided by the present invention;

[0031] Figure 7 This is a schematic structural diagram of a muffler of a power unit of a cleaning device provided by the present invention;

[0032] Figure 8 This is a schematic cross-sectional view of the muffler of the power unit of the cleaning equipment provided by the present invention;

[0033] Figure 9 is a structural schematic view of a second damping pad of a power device of a cleaning device provided by the present application;

[0034] Figure 10 is a sectional structural schematic view of a second damping pad of a power device of a cleaning device provided by the present application;

[0035] Figure 11 is a structural schematic view of a first damping pad of a power device of a cleaning device provided by the present application;

[0036] Figure 12 is a structural schematic view of a first shell of a power device of a cleaning device provided by the present application.

[0037] Reference signs:

[0038] first shell 110; inner chamber 111; outer chamber 112; air inlet 113; air outlet passage 114; second shell 120; cylindrical portion 121; partition portion 122; pressure equalizing hole 123; first pressure equalizing chamber 124; second pressure equalizing chamber 125; third shell 130; interlayer chamber 131; arc-shaped groove 132; silencer 140; silencing chamber 141; silencing hole 142; support 150; tubular portion 151; central hole 152; sound-absorbing cotton 160; arc-shaped surface 161; first damping pad 170; annular groove 171; damping layer 172; second damping pad 180; skirt portion 181; cylindrical battery 190; fan assembly 200; fan body 210; air guide cover 220; air duct inlet 221. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the accompanying drawings in the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0040] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. It should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The present application provides a power device of a cleaning equipment, which reduces the noise generated by air flow vibration by ensuring uniform air flow in the flow channel, thereby providing a noise reduction scheme for the cleaning equipment and solving the problem of equipment noise reduction.

[0042] The following will be described in combination with Figures 1-12 each specific embodiment of the power device of the cleaning equipment of the present application.

[0043] As Figure 1 , Figure 2 and Figure 3 indicated, the present application provides a power device of a cleaning equipment, comprising: a first shell 110 having an inner chamber 111 with an open top and an outer chamber 112, the inner chamber 111 being provided with an air inlet 113, and the outer chamber 112 being provided with an air outlet passage 114; a second shell 120 comprising a cylindrical portion 121 and a partition portion 122 fixed in the cylindrical portion 121, one end of the cylindrical portion 121 being in abutting cooperation with the opening at the top of the inner chamber 111, and the partition portion 122 being provided with a plurality of pressure equalizing holes 123 distributed in a ring shape, the partition portion 122 dividing the space in the cylindrical portion 121 into a first pressure equalizing chamber 124 and a second pressure equalizing chamber 125; a third shell 130 being arranged above the second shell 120 and in abutting cooperation with the opening at the top of the outer chamber 112, and a sandwiched chamber 131 being formed between the third shell 130 and the outer side surface of the cylindrical portion 121. Under the cooperation of the first shell 110, the second shell 120 and the third shell 130, the above-mentioned shell structure realizes a flow channel structure in which the air inlet 113 is communicated to the air outlet passage 114 in sequence through the inner chamber 111, the second pressure equalizing chamber 125, the first pressure equalizing chamber 124, the sandwiched chamber 131 and the outer chamber 112.

[0044] The power device of the cleaning device further comprises a fan assembly 200, a part of which is located in the inner chamber 111 and the other part is located in the second equalizing chamber 125. The outer shell structure of the fan assembly 200 is formed by the first shell 110, the second shell 120 and the third shell 130, which not only protects the fan assembly 200, but also forms the air passage composed of the inner chamber 111, the second equalizing chamber 125, the first equalizing chamber 124, the interlayer chamber 131 and the outer chamber 112. The partition 122 separates the space in the cylindrical part 121 into the first equalizing chamber 124 and the second equalizing chamber 125. During the air flow, the air can only pass through the multiple equalizing holes 123 in annular distribution from the second equalizing chamber 125 to the first equalizing chamber 124, so that the air is evenly distributed after entering the first equalizing chamber 124, the pressure difference gradient between the air flowing in each direction is reduced, and the aerodynamic noise generated by the vortex and pressure pulsation is reduced, thereby reducing the generation of noise.

[0045] In addition, the mechanical noise generated by the fan assembly 200 during operation needs to pass through the chambers composed of the inner chamber 111 and the second equalizing chamber 125 and the chambers composed of the interlayer chamber 131 and the outer chamber 112 before being conducted to the outside, and the air in the two chambers can also absorb and reduce the mechanical noise. Moreover, the fan assembly 200 is arranged in the inner chamber 111 and the second equalizing chamber 125, and can exchange heat with the running fan assembly 200 when the air passes through, thereby achieving heat dissipation of the fan assembly 200.

[0046] As shown in Figure 5 and Figure 6 , the second shell 120 is preferably designed with two coaxial circular holes in uniform distribution to form the multiple equalizing holes 123 in annular distribution. The fan assembly 200 drives the air flow to pass through the equalizing holes 123 and enter the first equalizing chamber 124 evenly from the second equalizing chamber 125, thereby sufficiently reducing the pressure difference gradient between the air in each direction of the device, reducing the aerodynamic noise generated by the air vortex and pressure pulsation. The gas in the first equalizing chamber 124 enters the interlayer chamber 131 by turning 180°, so that the air can dissipate heat to the shell structure inside and outside the device during the flow.

[0047] According to the power device of the cleaning device provided by the application, as shown in Figure 2 and Figure 3 , the first equalizing chamber 124 is provided with a cylindrical silencer 140, and the silencer 140 is coaxially arranged with the cylindrical part 121. As shown in Figure 2 , Figure 7 and Figure 8 , the silencer 140 forms a silencing cavity 141 inside, and the outer peripheral wall of the silencer 140 is uniformly distributed with multiple silencing holes 142 communicating inside and outside the silencing cavity 141. As shown in Figure 2As shown, the sound holes 142 filter noise in a certain frequency range when the air flow passes through the outer wall of the muffler 140, and the noise reduction effect can be improved by arranging the muffler 140. The main body shape of the fan assembly 200 is preferably cylindrical, and the radial dimension of the muffler 140 is preferably close to or the same as the radial dimension of the fan assembly 200, so that a uniform air flow channel can be formed around the muffler 140 and the fan assembly 200.

[0048] As shown in Figure 7 and Figure 8 , the structure of the muffler 140 is preferably a cylindrical sealed cavity, and the sound holes 142 are arranged on the outer side of the muffler 140 to form a micro-perforated panel sound absorption structure. The actual opening rate and hole diameter can be adaptively designed according to the operating frequency and bandwidth of the fan assembly 200. Compared with traditional perforated mufflers, in use, the air flow passes through the sound holes 142 vertically without passing through the sound holes 142, thereby reducing the impact on the air flow speed. In specific applications, cleaning equipment such as floor cleaning machines usually have a fan speed above 60,000 rpm, and the fan generates a shaft base frequency of 1,000-1,500 Hz. The muffler 140 can be designed with an opening rate and hole diameter that targets the peak value of the fan base frequency, thereby achieving targeted noise reduction.

[0049] According to the power device of the cleaning equipment provided by the present application, the muffler 140 can be directly arranged between the third housing 130 and the second housing 120 to support both, or an additional support structure can be arranged between the third housing 130 and the second housing 120 to limit the relative position between the two. Preferably, as shown in Figure 2 , a support 150 is arranged between the third housing 130 and the second housing 120. The support 150 includes a tubular portion 151 supported between the partition portion 122 and the top of the third housing 130, and the muffler 140 has a central hole 152 matched with the tubular portion 151, and the muffler 140 is sleeved on the tubular portion 151. The partition portion 122 has an opening opposite the tubular portion 151, so that the power supply line of the fan assembly 200 can extend to outside the third housing 130 through the tubular portion 151.

[0050] By arranging the support 150 between the second housing 120 and the third housing 130, not only can the support effect between the second housing 120 and the third housing 130 be provided, but also the power supply line of the fan assembly 200 can be arranged through the tubular portion 151, thereby reducing the difficulty of structural design and disassembly and maintenance of the device. For example, without disassembling the first housing 110, the second housing 120 and the third housing 130, the power supply line between the fan assembly 200 and the power supply element can be connected through the tubular portion 151.

[0051] According to the power device of the cleaning equipment provided by the application, the sound-absorbing cotton 160 is arranged at the intersection of the outer chamber 112 and the air exhaust channel 114. The sound-absorbing cotton 160 is preferably made of porous material, and the energy of the noise sound wave is absorbed by the sound-absorbing cotton 160, so that the noise sound wave is weakened.

[0052] According to the power device of the cleaning equipment provided by the application, as shown in Figure 12 The one side of the sound-absorbing cotton 160 facing the outer chamber 112 is preferably an arc-shaped surface 161, and the arc-shaped surface 161 and the outer chamber 112 combine to form a ring-shaped air duct structure. By combining the arc-shaped surface 161 and the outer chamber 112 to form a ring-shaped air duct structure, the effect of absorbing noise energy is achieved, and the influence of the sound-absorbing cotton on the air flow is reduced, which is beneficial to maintaining the uniform air pressure in the ring-shaped air duct structure.

[0053] The fan assembly 200 can be suspended between the second shell 120 and the first shell 110 by the support provided with the damping structure, so as to prevent the mechanical vibration from being directly transmitted to the shell structure. According to the power device of the cleaning equipment provided by the application, as shown in Figure 2 and Figure 3 The fan assembly 200 includes a fan body 210 and a funnel-shaped air guide cover 220, and the bottom of the air guide cover 220 is formed with an air duct inlet 221 opposite to the air inlet 113. The first damping pad 170 is arranged between the fan body 210 and the partition layer 122, and the second damping pad 180 is arranged between the air guide cover 220 and the inner chamber 111. The fan body 210 and the air guide cover 220 of the fan assembly 200 are respectively provided with the first damping pad 170 and the second damping pad 180, and the elastic damping effect of the first damping pad 170 and the second damping pad 180 reduces the vibration transmission of the fan assembly 200 to the outside during operation, thereby reducing the noise generated by the mechanical vibration.

[0054] According to the preferred embodiment, as shown in Figure 2 The fan assembly 200 is only in direct contact with the first damping pad 170 and the second damping pad 180 in the device, and the first shell 110 and the second shell 120 are fixed to the fan assembly 200 by limiting through the first damping pad 170 and the second damping pad 180, so as to reduce the conduction of the mechanical vibration.

[0055] According to the power device of the cleaning equipment provided by the application, the damping effect of the damping pad can be realized only based on the elastic material of the damping pad itself, or preferably, as shown in Figure 9 、 Figure 10 and Figure 11As shown in FIG. 1 and FIG. 2, at least one annular groove 171 is formed on the outer circumferential surface of the first damping pad 170 and / or the second damping pad 180, so as to form a plurality of damping layers 172 on the outer circumferential surface of the first damping pad 170 and / or the second damping pad 180. The plurality of damping layers 172 of the first damping pad 170 and / or the second damping pad 180 can absorb vibration by compressing the space of the annular groove 171 through elastic deformation, thereby improving the damping performance of the first damping pad 170 and / or the second damping pad 180.

[0056] According to the present application, a power device of a cleaning device is provided, as shown in Figure 2 、 Figure 9 and Figure 10 As shown in FIG. 1 and FIG. 2, the second damping pad 180 preferably has a skirt portion 181 matching the shape of the air deflector 220, and the skirt portion 181 completely separates the outer surface of the air deflector 220 from the inner surface of the inner chamber 111. By separating the air deflector 220 from the inner chamber 111 through the skirt portion 181, the vibration transmission in each direction of the air deflector 220 and the inner chamber 111 can be reduced based on the elastic deformation of the skirt portion 181, and further prevent the increase of mechanical vibration noise caused by rigid contact. As shown in Figure 9 and Figure 10 The outer surface of the skirt portion 181 can also form a plurality of annular shallow grooves, which have similar effects as the annular groove 171 described above, and increase the compression deformation performance and damping performance of the skirt portion 181.

[0057] On the other hand, as shown in Figure 2 and Figure 10 The air inlet 113 of the inner chamber 111 preferably forms a convex structure facing the fan assembly 200, and the second damping pad 180 forms a concave structure matching the air inlet 113 on the side close to the air inlet 113. The matching of the convex structure and the concave structure is conducive to the relative position limitation of the air deflector 220 and the inner chamber 111, and under the mechanical vibration generated by the operation of the fan assembly 200, the convex structure and the concave structure match each other to prevent the displacement of the second damping pad 180. In the case that the second damping pad 180 has relatively reliable stability, the damping performance of the second damping pad 180 can be fully utilized, and a better sealing effect can be provided between the inner chamber 111 and the air deflector 220.

[0058] According to market demand, cleaning devices are gradually developing towards miniaturization and light weight. In limited space, not only noise reduction needs to be considered, but also battery temperature during device operation needs to be considered. When the battery temperature is too high, it is easy to cause battery damage or trigger power protection, which not only easily reduces the service life of the battery, but also causes the user to be unable to complete the cleaning work smoothly.

[0059] According to the present application, a power device of a cleaning device is provided, as shown in Figure 1 and Figure 3As shown, the battery pack is formed by a plurality of cylindrical batteries 190. Figure 4 As shown, the outer circumferential surface of the third shell 130 is preferably formed with arc-shaped grooves 132 for defining the mounting positions of the cylindrical batteries 190; the air flowing in the interlayer cavity 131 can be conducted by the third shell 130 to exchange heat with the cylindrical batteries 190 in the arc-shaped grooves 132. According to the power device of the embodiment, the air flow inside the third shell 130 can be used to dissipate heat from the battery pack.

[0060] Specifically, when the fan assembly 200 is running, the cylindrical batteries 190 generate heat while being powered, and the arc-shaped grooves 132 of the third shell 130 increase the contact area with the cylindrical batteries 190, so that the heat is quickly conducted to the third shell 130. The heat exchanges with the air flowing in the interlayer cavity 131 inside the third shell 130 to achieve the effect of indirect air cooling of the cylindrical batteries 190, which can prevent the temperature of the battery pack from being too high.

[0061] The present application also provides a cleaning device comprising the power device of any one of the above embodiments, which can be a cleaning electrical device commonly used in families such as a scrubber or a vacuum cleaner.

[0062] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "way", "specific way", or "some ways" means that the specific features, structures, materials or characteristics described in connection with the embodiment or way are included in at least one embodiment or way of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or way. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or ways in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or ways described in the present application and the features of the different embodiments or ways without contradiction.

[0063] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A power unit for a cleaning apparatus, characterized in that The utility model relates to a kind of air supply and exhaust device, including: First shell (110), with top open inner chamber (111) and outer chamber (112), the inner chamber (111) is provided with air inlet (113), the outer chamber (112) is provided with exhaust passage (114); Second shell (120), including cylindrical portion (121) and fixed in the partition layer portion (122) of the cylindrical portion (121), one end of the cylindrical portion (121) is matched with the opening of the inner chamber (111) top, the partition layer portion (122) is provided with the multiple pressure equalizing holes (123) of annular distribution, the partition layer portion (122) separates the space in the cylindrical portion (121) into first pressure equalizing chamber (124) and second pressure equalizing chamber (125); Third shell (130), cover is set on the second shell (120) upper, and with the opening of the outer chamber (112) top is matched, and the third shell (130) and the outer side of the cylindrical portion (121) form interlayer chamber (131) between; Fan assembly (200), a part is located in the inner chamber (111), the rest is located in the second pressure equalizing chamber (125); The air inlet (113) is communicated with the exhaust passage (114) by the inner chamber (111), the second pressure equalizing chamber (125), the first pressure equalizing chamber (124), the interlayer chamber (131) and the outer chamber (112) in turn.

2. A power unit for a cleaning apparatus according to claim 1, characterised in that The first pressure equalizing chamber (124) is provided with cylindrical silencer (140), and the silencer (140) is coaxially arranged with the cylindrical portion (121); Silencer (140) is formed with silencer chamber (141) inside, and the outer peripheral wall of silencer (140) is uniformly distributed with multiple sound holes (142) that communicate inside and outside of silencer chamber (141).

3. A power unit for a cleaning apparatus according to claim 2, characterised in that Supporting piece (150) is arranged between the third shell (130) and the second shell (120); The supporting piece (150) includes tubular portion (151) supported between the partition layer portion (122) and the top of the third shell (130), the silencer (140) has a center hole (152) matched with the tubular portion (151), and the silencer (140) is sleeved on the tubular portion (151); The partition layer portion (122) has an opening opposite to the tubular portion (151), so that the energized circuit of the fan assembly (200) can extend to outside the third shell (130) through the tubular portion (151).

4. The power unit of a cleaning apparatus according to claim 1, wherein Sound-absorbing cotton (160) is arranged at the intersection of the outer chamber (112) and the exhaust passage (114).

5. A power unit for a cleaning apparatus according to claim 4, characterised in that One side of the sound-absorbing cotton (160) towards the outer chamber (112) is an arc surface (161), and the arc surface (161) and the outer chamber (112) form an annular air duct structure.

6. The power unit of a cleaning apparatus according to claim 1, wherein The fan assembly (200) comprises a fan body (210) and a funnel-shaped air guide cover (220), a bottom of the air guide cover (220) is formed with an air duct inlet (221) opposite to the air inlet (113); The fan body (210) is provided with a first damping pad (170) between the fan body (210) and the partition layer (122), and the air guide cover (220) is provided with a second damping pad (180) between the air guide cover (220) and the inner chamber (111).

7. A power unit for a cleaning apparatus according to claim 6, characterised in that At least one annular groove (171) is formed on the outer circumferential surface of the first damping pad (170) and / or the second damping pad (180) to form a plurality of damping layers (172) on the outer circumferential surface of the first damping pad (170) and / or the second damping pad (180).

8. A power unit for a cleaning apparatus according to claim 6, characterised in that The second damping pad (180) has a skirt portion (181) matched with the shape of the air guide cover (220), and the skirt portion (181) completely separates the outer surface of the air guide cover (220) from the inner surface of the inner chamber (111); And / or, the air inlet (113) of the inner chamber (111) forms a convex structure towards the fan assembly (200), and the second damping pad (180) forms a concave structure matched with the air inlet (113) on the side close to the air inlet (113).

9. A power unit for a cleaning device according to any one of claims 1-8, characterized in that A battery pack comprising a plurality of cylindrical batteries (190); An arc-shaped groove (132) is formed on the outer circumferential surface of the third shell (130) to define the mounting position of the cylindrical battery (190); The air flowing in the interlayer chamber (131) can exchange heat with the cylindrical battery (190) in the arc-shaped groove (132) through the heat conduction of the third shell (130).

10. A cleaning apparatus, characterized by A power device comprising the cleaning device of any one of claims 1-9.

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