Electric air pump

Abstract

The utility model discloses an electric air pump, which comprises a shell, an air inlet, an air outlet, an air inlet, an air outlet, an air inlet, an air outlet and an air outlet. The brushless motor is mounted in the air channel; the controller is installed in the air channel and electrically connected with the brushless motor. The brushless motor defines an air flow channel, and the air flow channel is communicated with the air inlet and the air outlet. The noise of the electric air pump can be reduced, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the field of air pumps, in particular to an electric air pump. Background Art

[0002] An electric air pump is an electric powered device, mainly used for inflation and suction. The function of an electric air pump is to use electricity to drive a compressor to deliver gas to items that need to be inflated, thereby achieving the effect of rapid inflation. It is widely used in the inflation and suction of various inflatable products, such as inflatable mattresses, inflatable sofas, etc. At present, most electric air pumps on the market are driven by brushed motors. From the perspective of comfort and convenience, brushed motors have inherent deficiencies such as high noise, low efficiency, and the need to regularly replace carbon brushes, which seriously affect the user experience. Utility Model Content

[0003] The utility model aims to solve the problem of high noise of existing electric air pumps. The utility model provides an electric air pump which can effectively reduce noise and improve user experience.

[0004] In order to solve the above technical problems, the embodiment of the utility model discloses an electric air pump, comprising:

[0005] A housing, comprising an air inlet and an air outlet, and defining an air passage, wherein the air passage communicates the air inlet and the air outlet;

[0006] a brushless motor installed in the air duct; and

[0007] A controller, installed in the airway and electrically connected to the brushless motor;

[0008] Wherein, the brushless motor defines an air flow channel, and the air flow channel connects the air inlet and the air outlet.

[0009] Preferably, the electric air pump further comprises: a bracket, which is accommodated in the housing and defines a limiting cavity; wherein the brushless motor is installed in the limiting cavity.

[0010] Preferably, the electric air pump further comprises: a vibration reduction element sandwiched between the brushless motor and the cavity wall of the limiting cavity.

[0011] Preferably, the vibration-damping element comprises a bushing.

[0012] Preferably, the area of ​​the air inlet is not less than 70% of the area of ​​the air outlet.

[0013] Preferably, the electric air pump comprises a plurality of air inlets, and a total area of ​​the plurality of air inlets is not less than 70% of an area of ​​the air outlet.

[0014] Preferably, the brushless motor further comprises an axial flow fan and a motor shaft, wherein the motor shaft drives the axial flow fan to rotate, and the axial flow fan is arranged at one end of the air flow channel close to the air inlet.

[0015] Preferably, the brushless motor comprises an inner shell and an outer shell sleeved outside the inner shell, and the inner shell and the outer shell define the airflow channel.

[0016] Preferably, the brushless motor further comprises a plurality of guide plates, wherein the plurality of guide plates are arranged in the air flow channel, and each of the guide plates connects the inner shell and the outer shell.

[0017] Preferably, the guide plate, the inner shell and the outer shell are made of metal and formed in one piece.

[0018] Preferably, each guide plate and the axial direction of the brushless motor form an acute angle.

[0019] Preferably, each of the guide plates has a curved surface, wherein a slope of the curved surface relative to an axial direction of the brushless motor gradually decreases in a direction from the air inlet to the air outlet.

[0020] The electric air pump proposed in the present application is driven by a brushless motor. Compared with a brushed motor, a brushless motor has less friction and does not generate arcs during operation, and has less noise. Furthermore, in some embodiments of the present application, a limiting cavity is formed by a bracket, and a brushless motor is accommodated in the limiting cavity. On the one hand, the stability of the brushless motor when installed in the housing is improved, and the brushless motor is prevented from shaking in the housing and generating noise. On the other hand, the noise generated by the brushless motor when working in the limiting cavity needs to pass through the two-layer structure of the bracket and the housing before it can be transmitted, so the purpose of noise reduction is also achieved to a certain extent.

[0021] In addition, in some embodiments of the present application, a vibration-damping element is provided between the brushless motor and the cavity wall of the limiting cavity, and the vibration-damping element dampens and buffers the vibration generated by the rotation of the rotor of the brushless motor, thereby reducing noise near the noise source. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a partial cross-sectional view of an inflatable mattress;

[0023] Figure 2 is a partial cross-sectional view of another inflatable mattress;

[0024] Figure 3 is a partial cross-sectional view of an inflatable pool;

[0025] Figure 4 is a partial cross-sectional view of another inflatable mattress;

[0026] Figure 5 is a partial cross-sectional view of another inflatable mattress;

[0027] Figure 6 It is a three-dimensional electric air pump in one embodiment of the present application. Figure 1 ;

[0028] Figure 7 is an exploded view of an electric air pump in one embodiment of the present application;

[0029] Figure 8 is a cross-sectional view of an electric air pump in one embodiment of the present application;

[0030] Fig. 9 is a three-dimensional diagram of an air intake component in one embodiment of the present application;

[0031] Fig.10 yes Figure 8 A partial enlarged view of the middle A area;

[0032] Fig.11 is a three-dimensional diagram of an air outlet component in one embodiment of the present application;

[0033] Fig.12 yes Figure 8 A partial enlarged view of the middle B area;

[0034] Fig.13 and Fig.14 They are respectively three-dimensional diagrams of the second housing in one embodiment of the present application;

[0035] Fig.15 is a three-dimensional diagram of a first housing in one embodiment of the present application;

[0036] Fig.16 is a three-dimensional diagram of a first bracket in one embodiment of the present application;

[0037] Fig.17 is a three-dimensional diagram of a second bracket in one embodiment of the present application;

[0038] Fig.18 is a three-dimensional diagram of an electric air pump in one embodiment of the present application, wherein a housing of the electric air pump is not shown;

[0039] Fig.19 is a three-dimensional diagram of a brushless motor in one embodiment of the present application, wherein a housing of the brushless motor is not shown;

[0040] Fig. 20 It is a cross-sectional view of a brushless motor in one embodiment of the present application.

[0041] Description of the drawings: 1. Inflatable product; 11. First wall; 12. Second wall; 13. Inflatable chamber; 21. Sheet-like tensioning member; 22. Linear tensioning member; 10. Electric air pump; 100. Housing; 101. Accommodating chamber; 110. First housing; 111. First convex rib; 112. Second convex rib; 113. Connecting hole; 120. Second housing; 121. First slot; 122. Second slot; 123. First convex portion; 124. Connecting portion; 125. first stop surface; 126. second connecting column; 127. sixth connecting hole; 128. groove; 129. limiting rib; 130. inner wall; 200. air inlet component; 201. first end; 202. second end; 203. threading hole; 204. limiting groove; 205. first limiting surface; 206. limiting member; 207. air inlet; 300. air outlet component; 301. plug-in portion; 302. limiting convex portion; 303. second limiting surface; 3 04. Air outlet; 400. Power cord; 500. Main body; 501. Switch; 600. Bracket; 601. Limiting cavity; 602. First mounting portion; 603. Second mounting portion; 604. Extending portion; 605. Opening; 610. First bracket; 611. First limiting portion; 612. First frame portion; 613. Third rib; 614. First connecting hole; 617. Sixth rib; 620. Second bracket; 621. Second limiting portion 622. second frame portion; 623. third slot; 624. second connection hole; 630. fifth rib; 631. sixth slot; 640. air flow channel; 700. brushless motor; 701. motor body; 702. terminal; 703. protective cover; 704. claw; 710. controller; 720. motor shaft; 730. axial flow fan; 740. inner shell; 750. outer shell; 760. guide plate; 800. vibration reduction element. DETAILED DESCRIPTION

[0042] The following is an explanation of the implementation of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0043] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0044] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0045] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0046] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0047] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0048] like Figures 1 to 5 As shown, in the description of the present application, the inflatable product 1 includes at least one first wall 11, a second wall 12 and an inflatable chamber 13 for inflation defined by the first wall 11 and the second wall 12. After the pressure of the gas (e.g., air) in the inflatable chamber 13 reaches a desired value, the inflatable product 1 is in an inflated state and maintains a preset shape; and when the gas in the inflatable chamber 13 is discharged, the inflatable product 1 is in a deflated state, and the volume of the inflatable product 1 is greatly reduced relative to when it is in the inflated state, thereby facilitating the storage of the inflatable product 1.

[0049] A plurality of tensioning members are provided in the inflation chamber 13 of the inflatable product 1, and the tensioning members are connected to the first wall 11 and the second wall 12 by high-frequency welding, hot melting, gluing or other connection methods. After being tensioned, the tensioning members provide a pulling force to the first wall 11 and the second wall 12 to limit the deformation of the inflatable product 1, so that the inflatable product 1 can maintain a preset shape after being inflated.

[0050] Optionally, the plurality of tension members may have different structures in different embodiments. For example, each tension member may be a sheet-like tension member 21 (eg Figures 1 to 3 as shown) or a linear tension member 22 (as shown Figure 4 and Figure 5 shown).

[0051] like Figures 1 to 3 As shown, the sheet-like tension member 21 may have a single-layer structure or a composite-layer structure according to actual needs.

[0052] When the sheet-like tension member 21 is a single-layer sheet, it can be made of a polymer material, which can include but is not limited to one or more of polyvinyl chloride (PVC), polyurethane (PU), thermoplastic urethanes (TPU), polyethyleneterephthalate (PET), ethylene-vinyl acetate (EVA) copolymer and nylon. It can be understood that the main body of the single-layer sheet-like tension member 21 can also be made of other materials other than polymer materials in other embodiments, such as a fabric material, wherein the fabric material can be finely woven or formed into a mesh structure. The fabric material can be but is not limited to a natural fiber fabric (for example, but not limited to, cotton fabric, linen fabric, wool fabric, silk fabric) or a synthetic fiber fabric (for example, but not limited to, polyester fiber fabric, polyethylene fiber fabric, polypropylene fiber fabric).

[0053] When the sheet-like tension member 21 is a composite sheet, it is composed of two or more layers of sheets bonded together by gluing, welding or other means, and each layer of the multi-layer sheet can be made of the polymer material or other materials as described above.

[0054] like Figure 4 and Figure 5As shown, the linear tension member 22 includes one or more wires, which span the distance between the first wall 11 and the second wall 12 of the inflatable product 1, and are optionally parallel or substantially parallel in space, for example, the wires are spaced from each other at equal distances or in a manner that varies according to a certain rule. The material of one or more wires in the linear tension member 22 can be, but is not limited to, natural fibers (for example, but not limited to, cotton fibers, linen fibers, wool fibers, silk fibers) or synthetic fibers (for example, but not limited to, polyester fibers, polyethylene fibers, polypropylene fibers). The linear tension member 22 is usually indirectly connected to the first wall 11 and the second wall 12 via a connector, and the connector can be made of, but is not limited to, a polymer material that is convenient for welding the first wall 11 and the second wall 12.

[0055] refer to Figure 6 The present application provides an electric air pump 10 for inflating inflatable products including but not limited to the above.

[0056] Specifically, the electric air pump 10 includes a housing 100 and a power cord 400. The housing 100 includes an air inlet component 200, an air outlet component 300 and a main body 500. The air inlet component 200 and the air outlet component 300 are respectively detachably connected to the main body 500, so that the air inlet component 200 or the air outlet component 300 can be replaced according to actual needs. The housing 100 defines an air passage inside thereof, the air inlet component 200 includes an air inlet 207, and the air outlet component 300 includes an air outlet 304, and the air passage communicates the air inlet 207 of the air inlet component 200 and the air outlet 304 of the air outlet component 300. When the electric air pump 10 works in the blowing state, air is sucked into the housing 100 through the air inlet component 200, and then the pressurized air is discharged from the housing 100 through the air outlet component 300. It can be understood that in other embodiments, the above-mentioned air inlet component 200 and / or the air outlet component 300 are optionally provided integrally with the main body 500.

[0057] Along the extension direction of the electric air pump 10 ( Figure 6 The air inlet component 200 and the air outlet component 300 are respectively located at the two ends of the main body 500 and are both connected to the outside for air to flow in and out. A switch key 501 is provided on the outer wall of the housing 100, and the switch key 501 is used to control the start and stop of the electric air pump 10.

[0058] The power cord 400 is used to connect an external power source to operate the electric air pump 10. When the electric air pump 10 is operating, air is sucked in from the air inlet component 200, flows through the internal space of the housing 100, and is discharged from the air outlet component 300, thereby inflating an external inflatable product (e.g., an inflatable mattress, an inflatable pool). The power cord 400 is optionally located at one end of the air inlet component 200.

[0059] refer to Figure 7 and Figure 8 The housing 100 defines a receiving chamber 101 therein, and the air passage is located in the receiving chamber 101. Optionally, the housing 100 includes a first housing 110 and a second housing 120, both of which are roughly semi-cylindrical, and the two are spliced ​​to define the receiving chamber 101 together.

[0060] The electric air pump 10 may further include a bracket 600, which is disposed in the accommodating cavity 101. Figure 7 In the illustrated embodiment, the bracket 600 includes a first bracket 610 and a second bracket 620. The first bracket 610 is connected to the first shell 110, and the second bracket 620 is connected to the second shell 120. The first bracket 610 and the second bracket 620 are spliced ​​to form a limiting cavity 601. A brushless motor 700 is fixedly installed in the limiting cavity 601. The brushless motor 700 defines an air flow channel, and the air flow channel connects the air inlet 207 and the air outlet 304. A vibration-damping element 800 is provided on the outer cover of the brushless motor 700, and the outer surface of the vibration-damping element 800 abuts against the cavity wall of the limiting cavity 601. For example, the vibration-damping element 800 is a bushing made of silicone. It can be understood that the vibration-damping element 800 can be made of other materials (including but not limited to rubber) in other embodiments.

[0061] The present application uses a brushless motor 700 as the power to drive the air. Compared to a brushed motor, the brushless motor 700 does not have physical contact between the commutator and the brush during operation, so there is no energy loss caused by the corresponding friction, and no arc will be generated when the brushed motor is commutated, thereby improving the efficiency and life of the motor and reducing noise. Moreover, the brushless motor 700 does not contain relative motion structures such as carbon brushes and commutators, so it can operate reliably at a higher design speed, thereby generating an airflow with a larger flow rate. Accordingly, compared to a conventional air pump using a brushed motor, the electric air pump of this embodiment has higher reliability, lower noise, smaller size, and higher efficiency.

[0062] In this embodiment, the bracket 600 forms a limiting cavity 601. The brushless motor 700 is accommodated in the limiting cavity 601. The vibration reduction element 800 is arranged between the brushless motor 700 and the cavity wall of the limiting cavity 601. The vibration reduction element 800 buffers the vibration generated by the rotation of the rotor of the brushless motor 700, thereby reducing noise near the noise source.

[0063] Optionally, along the axial direction of the brushless motor 700 ( Figure 7 The air inlet component 200 and the air outlet component 300 are fixedly connected to two ends of the main body 500 of the shell 100 .

[0064] Specifically, if Figures 8 to 10As shown, the air intake component 200 is cylindrical and includes a first end 201 and a second end 202. The first end 201 is open for the bracket 600 to extend, and the second end 202 is provided with a threading hole 203. The power cord 400 extends from the threading hole 203 and is used to be electrically connected to the controller 710 that controls the brushless motor 700, and is used to supply power to the controller 710.

[0065] The inner wall of the air intake component 200 is provided with a limiting groove 204 near the first end 201, and the limiting groove 204 is arranged around the inner wall of the air intake component 200. The inner wall of the air intake component 200 is also provided with a first limiting surface 205 and a plurality of limiting members 206, and the first limiting surface 205 faces the first end 201 along the axial direction of the brushless motor 700. The plurality of limiting members 206 can be optionally arranged at unequal intervals on the inner wall of the air intake component 200, and the limiting members 206 and the inner wall of the air intake component 200 are arranged opposite to each other along the radial direction thereof.

[0066] Accordingly, if Fig.10 As shown, the outer wall of the main body 500 of the housing 100, which is used to connect one end of the air intake component 200, is provided with a limiting rib 129. The end of the main body 500 is inserted into the air intake component 200, and the limiting rib 129 thereof is clamped in the limiting groove 204, the limiting member 206 and the inner wall of the air intake component 200 clamp the main body 500, and the first limiting surface 205 abuts against the end of the main body 500, thereby limiting the relative shaking of the main body 500 and the air intake component 200.

[0067] Those skilled in the art will appreciate that, in this embodiment, the air intake component 200 and the main body 500 are connected by snap-fitting, but in other embodiments, the connection between the two can also be achieved by other means (for example, but not limited to, screw connection).

[0068] refer to Figure 8 , Fig.11 and Fig.13 The air outlet component 300 may be provided with a plug-in portion 301, and the plug-in portion 301 is provided with two circumferentially ( Fig.11 The limiting convex parts 302 are arranged at intervals (as shown in the R direction in the middle), and the end of the plug-in part 301 away from the main body 500 is provided with a second limiting surface 303. Correspondingly, the connecting part 124 of the main body 500 for connecting the air outlet component 300 is provided with two grooves 128 arranged at intervals along its circumference, and the grooves 128 are used for the limiting convex parts 302 of the plug-in part 301 to enter the accommodating cavity 101, and then rotate circumferentially, so that the limiting convex parts 302 and the grooves 128 are staggered and stuck in the main body 500, preventing the air outlet component 300 from sliding out of the accommodating cavity 101 of the shell 100. In addition, the inner wall 130 of the connecting part 124 abuts against the outer wall of the plug-in part 301, and the surface of the end of the connecting part 124 abuts against the second limiting surface 303, thereby limiting the shaking of the air outlet component 300 relative to the main body 500.

[0069] Those skilled in the art will appreciate that, in other embodiments, the air outlet component 300 and the main body 500 may also be connected by other means, such as by screws.

[0070] like Fig. 9 and Fig.11 As shown, a plurality of long strip-shaped air inlets 207 are provided on the outer wall of the air inlet component 200 to allow outside air to enter the electric air pump 10. The air outlet 304 of the air outlet component 300 is configured to inflate the inflatable product. It is understood that in other embodiments, the air inlet 207 may also have other shapes. It is also understood that in some embodiments, only one air inlet 207 may be provided.

[0071] Optionally, the area of ​​the air inlet 207 cannot be too small compared to the area of ​​the air outlet 304 to ensure the air intake efficiency and reduce the noise to a certain extent. For example, the sum of the areas of the multiple air inlets 207 may be greater than the cross-sectional area of ​​the air outlet 304. Alternatively, the sum of the areas of the multiple air inlets 207 may be less than (or equal to) the cross-sectional area of ​​the air outlet 304, but the sum of the areas is not less than a certain proportion of the cross-sectional area of ​​the air outlet 304, for example, the total area of ​​the multiple air inlets 207 is not less than 70% of the cross-sectional area of ​​the air outlet 304. This can avoid the noise generated by the drastic change in flow velocity when the air flow flows inside the electric air pump 10, while ensuring the inflation efficiency, it can also reduce the noise emitted by the electric air pump 10 when it is working. In this embodiment, the total area of ​​the multiple air inlets 207 is approximately 80% of the cross-sectional area of ​​the air outlet 304.

[0072] Optionally, refer to Figure 7 , Fig.14 and Fig.15 The first shell 110 and the second shell 120 are snap-connected.

[0073] Specifically, refer to Fig.14 , the first direction on the longitudinal section of the second shell 120 ( Fig.14 The first and second card slots 121 and 122 are provided on both sides of the brushless motor 700 (in the X direction). The first and second card slots 121 and 122 are arranged along the axial direction of the brushless motor 700 ( Fig.14 The first slots 121 and the second slots 122 are arranged at intervals (as shown in the Z direction), and a second slot 122 is provided between each two adjacent first slots 121. Optionally, the first slots 121 and the second slots 122 are both substantially rectangular, wherein the length of the second slot 122 in the axial direction of the brushless motor 700 is greater than the length of the first slot 121.

[0074] A first protrusion 123 is protruded in the first slot 121 along the radial direction of the brushless motor 700 .

[0075] Correspondingly, refer to Fig.15 , a first direction on the longitudinal cross section of the first shell 110 ( Fig.15 The first convex rib 111 and the second convex rib 112 are convexly provided on both sides of the brushless motor 700, and the first convex rib 111 and the second convex rib 112 are axially ( Fig.15 The first convex ribs 111 and the second convex ribs 112 are arranged at intervals (as shown in the Z direction, i.e., the extension direction of the electric air pump), and a second convex rib 112 is provided between each two adjacent first convex ribs 111. Optionally, the first convex rib 111 and the second convex rib 112 are both roughly rectangular, wherein the length of the second convex rib 112 in the axial direction of the brushless motor 700 is greater than the length of the first convex rib 111.

[0076] In addition, each first rib 111 is provided with a snap-fit ​​hole 113, and the snap-fit ​​hole 113 is arranged along the first direction ( Fig.15 The first rib 111 is penetrated by the first rib 111 (as shown in the X direction).

[0077] Among them, reference Fig.14 and Fig.15 The first rib 111 is embedded in the first slot 121 , the second rib 112 is embedded in the second slot 122 , and the first convex portion 123 in the first slot 121 is embedded in the snap-fit ​​hole 113 on the first rib 111 , thereby realizing the connection between the first shell 110 and the second shell 120 .

[0078] Optionally, in this embodiment, the number of the first ribs 111 and the first slots 121 are four, and the number of the second ribs 112 and the second slots 122 are three. Fig.15 In the Z direction, the first shell 110 and the second shell 120 have seven connection points, thereby ensuring the reliability of the connection between the first shell 110 and the second shell 120.

[0079] Those skilled in the art will appreciate that, although in the present embodiment, the number of first ribs 111 and the number of first slots 121 are four respectively, and the number of second ribs 112 and the number of second slots 122 are three respectively, in other embodiments, any other number of first ribs 111, second ribs 112, and corresponding first slots 121 and second slots 122 may be provided, for example, two first ribs 111 and first slots 121, and five second ribs 112 and second slots 122 may be provided.

[0080] It can be understood that in other embodiments, the first shell 110 and the second shell 120 can also be connected in other connection ways (for example, but not limited to, screw connection, riveting, etc.).

[0081] refer to Figures 16 to 18 Combined with Figure 8The first bracket 610 may optionally include a first limit portion 611 and a first frame portion 612 connected to each other, and the second bracket 620 may optionally include a second limit portion 621 and a second frame portion 622 connected to each other. The first limit portion 611 and the second limit portion 621 are both roughly semi-cylindrical, and the two are spliced ​​to form a first mounting portion 602. The first mounting portion 602 is cylindrical, and a limit cavity 601 is defined inside it, and the limit cavity 601 is used to fix and install the brushless motor 700. The first frame portion 612 and the second frame portion 622 are connected to form a second mounting portion 603. The second mounting portion 603 is used to fix and install a controller 710, and the controller 710 is used to drive the brushless motor 700 and control the operation of the brushless motor 700.

[0082] Specifically, if Fig.16 As shown, the first direction ( Fig.16 The third ribs 613 are respectively provided on both sides of the brushless motor 700 (in the X direction). Each third rib 613 is arranged along the axial direction of the brushless motor 700 ( Fig.16 Correspondingly, as shown in the Z direction. Fig.17 As shown, the first direction ( Fig.17 The third slots 623 are provided on both sides of the brushless motor 700 (shown in the X direction), and each third slot 623 extends along the axial direction of the brushless motor 700. The third rib 613 and the third slot 623 are engaged to define the relative position between the first limiting portion 611 and the second limiting portion 621.

[0083] like Figures 16 to 18 As shown, optionally, the first frame portion 612 is provided with a plurality of first connection holes 614, and the second frame portion 622 is provided with a plurality of second connection holes 624. The plurality of first connection holes 614 and the plurality of second connection holes 624 correspond one to one, and each pair of the first connection holes 614 and the second connection holes 624 is respectively penetrated by a screw, so that the first frame portion 612 and the second frame portion 622 are fixedly connected by a plurality of screws.

[0084] Those skilled in the art will appreciate that, in other embodiments, the first bracket 610 and the second bracket 620 may also be connected by other means (for example, but not limited to, riveting, pin connection, etc.).

[0085] refer to Fig.12 , Fig.13 and Fig.14The above-mentioned second shell 120 includes a connecting portion 124, which is in a circular ring shape and is provided with a first stop surface 125. The ends of the second limiting portion 621 of the second bracket 620 and the first limiting portion 611 of the first bracket 610 are both in contact with the first stop surface 125, thereby realizing the connection between the second shell 120 and the second bracket 620 and the first bracket 610.

[0086] Those skilled in the art will appreciate that, in other embodiments, the connection between the first bracket 610, the second bracket 620 and the second shell 120 may be achieved by other means (for example, but not limited to, snap connection, riveting, screw connection, etc.).

[0087] In addition, refer to Figure 7 , Fig.12 and Fig.18 The outer walls of the first limiting portion 611 and the second limiting portion 621 are both provided with two fifth ribs 630, and the two fifth ribs 630 are arranged along the axial direction of the brushless motor 700 ( Fig.16 The first shell 110 covers the first limiting portion 611, and the fifth rib 630 on the first limiting portion 611 abuts against the inner wall of the first shell 110; the second shell 120 covers the second limiting portion 621, and the fifth rib 630 on the second limiting portion 621 abuts against the inner wall of the second shell 120, thereby further improving the stability of the connection between the first bracket 610 and the first shell 110, as well as the stability of the connection between the second bracket 620 and the second shell 120.

[0088] refer to Figures 7 to 9 as well as Fig.12 and Fig.18 , the second mounting portion 603 is located in the accommodating cavity 101. Specifically, the second mounting portion 603 includes a protruding portion 604, and the protruding portion 604 is arranged along the axial direction ( Fig.18 The extension portion 604 extends out of the accommodating cavity 101 (shown in the Z direction); the extension portion 604 includes an opening 605, which is connected to the threading hole 203 on the air intake component 200. The power line 400 passes through the threading hole 203 and the opening 605 in sequence and is connected to the controller 710.

[0089] Optionally, refer to Figure 8 , the controller 710 is located in the air passage and is arranged upstream of the brushless motor 700. After the outside air is sucked in from the air intake component 200, the airflow first passes through the controller 710 and then flows through the brushless motor 700. The airflow flowing through the surface of the controller 710 can take away the heat generated by the controller 710 during operation, preventing the controller 710 from overheating, so that the electric air pump can continue to work.

[0090] Optionally, refer to Figure 8 , Fig.13and Fig.14 The second housing 120 is also connected to the controller 710. Fig.13 As shown, the inner wall of the second housing 120 is provided with four second connection posts 126, which are distributed in a rectangular shape, and the center of each second connection post 126 is provided with a sixth connection hole 127. The controller 710 is provided with a seventh connection hole (not shown in the figure) corresponding to the sixth connection hole 127, so that a screw can pass through to achieve the connection between the second housing 120 and the controller 710.

[0091] refer to Figure 7 , along the axial direction of the brushless motor 700 ( Figure 7 The brushless motor 700 includes a motor body 701 and a connection terminal 702 connected to each other. The controller 710 supplies power to the brushless motor 700 through the connection terminal 702.

[0092] Alternatively, if Figure 7 , Fig.16 and Fig.17 As shown, the cavity wall of the limiting cavity 601 is provided with two sixth ribs 617. Each sixth rib 617 is annular and extends along the circumference of the brushless motor 700, and the two sixth ribs 617 extend along the axial direction of the brushless motor 700 ( Fig.16 The motor body 701 of the brushless motor 700 is located between the two sixth ribs 617 , so that the two sixth ribs 617 limit the position of the brushless motor 700 in the limiting cavity 601 .

[0093] The vibration reduction element 800 sleeved on the motor body 701 is in close contact with the cavity wall of the limiting cavity 601 to absorb and buffer the vibration generated when the rotor of the brushless motor 700 rotates.

[0094] like Fig.18 and Fig.19 As shown, the end of the bracket 600 close to the gas outlet component 300 is provided with a Fig.18 The plurality of sixth slots 631 are arranged at intervals (in the R direction), and the plurality of sixth slots 631 are arranged along the axial direction ( Fig.18 The protective cover 703 includes a plurality of claws 704, each claw 704 is respectively engaged in a sixth slot 631. The protective cover 703 covers and protects the connection terminal 702.

[0095] refer to Figure 8 , Fig.19 and Fig. 20 The motor body 701 of the brushless motor 700 is provided with an inner shell 740, and the inner shell 740 is provided with an outer shell 750. Fig. 20A plurality of guide plates 760 are provided between the inner shell 740 and the outer shell 750, and the inner shell 740 and the outer shell 750 are fixed together by these guide plates 760. These guide plates 760 are arranged along the circumference of the brushless motor 700 ( Fig.19 The inner shell 740 and the outer shell 750 define an airflow channel 640, and the guide plate 760 is disposed in the airflow channel 640 and guides the airflow flowing through the airflow channel 640. The air from the air inlet 207 flows out from the air outlet 304 through the airflow channel 640.

[0096] The brushless motor 700 includes a motor shaft 720 and an axial flow fan 730. One end of the motor shaft 720 is connected to the axial flow fan 730 and drives the axial flow fan 730 to rotate together when the motor shaft 720 rotates. The axial flow fan 730 is optionally disposed at one end of the air flow channel 640 near the air inlet 207.

[0097] It is understandable that, although the electric air pump can be designed to only inflate the inflatable product, it can also be designed to both inflate and exhaust the inflatable product. In other words, the electric air pump can be designed to only inhale air from the air inlet and exhaust air from the air outlet, but the electric air pump can also be designed to both inhale air from the outside atmosphere through the air inlet and exhaust air from the air outlet, or inhale air from the air outlet and exhaust the inhaled air into the outside atmosphere through the air inlet as required.

[0098] Since the axial flow fan 730 is used to drive the air, changing the direction of the airflow can be conveniently achieved by changing the rotation direction of the axial flow fan 730. In some embodiments, the rotation direction of the axial flow fan 730 can be optionally controlled by controlling the running direction of the brushless motor 700, thereby controlling the direction of the airflow in the housing 100. As described above, when the axial flow fan 730 is driven to rotate in a certain direction, the electric air pump works in a blowing state, and the air is sucked into the housing 100 through the air intake component 200, and then the pressurized air is discharged from the electric air pump through the air outlet component 300. Correspondingly, when the axial flow fan 730 is driven to rotate in another direction, the electric air pump works in an air intake state, and the air is sucked into the housing 100 through the air outlet component 300, and then the pressurized air is discharged from the electric air pump through the air intake component 200.

[0099] like Figure 8 , Fig.19 and Fig. 20As shown, the airflow driven by the axial fan 730 when rotating passes through the airflow channel 640, and also cools the brushless motor 700 itself, thereby improving the working efficiency of the brushless motor 700 and extending its service life. The inner shell 740, the outer shell 750 and the guide plate 760 are all made of metal (for example, aluminum) and are integrally formed, so that the heat generated by the components wrapped in the inner shell 740 can be quickly conducted to the guide plate 760 and the outer shell 750 through the inner shell 740, and immediately carried away by the airflow flowing through the airflow channel 640.

[0100] refer to Figure 7 , Figure 8 and Fig.19 Optionally, the guide plate 760 and the brushless motor 700 are axially ( Fig.19 When the user uses the electric air pump to inflate the inflatable product, the axial flow fan 730 is along the Fig.19 The axial fan 730 rotates in the direction of the arrow V shown in and pushes the air flow. The blades of the axial fan 730 are inclined relative to the axial direction of the brushless motor 700. Accordingly, the airflow formed by the pushed air is also inclined relative to the axial direction of the brushless motor 700 when entering the airflow channel 640. If the guide plate 760 is parallel to the axial direction of the brushless motor 700, the inclined airflow will hit the guide plate 760 to form turbulence, which will not only dissipate the energy of the airflow, but also generate noise. In this case, compared with the case where the guide plate 760 is parallel to the axial direction of the brushless motor 700, by arranging the axial fan 730 upstream of the guide plate 760 and tilting the guide plate 760 as described above, the impact of the airflow on the guide plate 760 can be reduced or even eliminated, thereby reducing the pressure loss of the airflow and reducing the noise of the electric air pump.

[0101] Still reference Figure 7 , Figure 8 and Fig.19 The guide plate 760 may optionally have an arc-shaped cross section. Accordingly, the guide plate 760 may optionally have a curved surface. The airflow entering the airflow channel 640 at a certain angle flows along the curved surface of the guide plate 760 and gradually turns, and when leaving the surface of the guide plate 760, it is substantially parallel to the axial direction ( Fig.19 In other words, under the premise that each guide plate 760 is at a certain angle to the axial direction of the brushless motor 700 as a whole, the slope of the surface of each guide plate 760 relative to the axial direction of the brushless motor 700 gradually decreases along the direction from the air inlet 207 to the air outlet 304 (i.e., the air flow direction in which the electric air pump inhales air from the air inlet 207 and discharges air from the air outlet 304).

[0102] The vibration-damping element 800 is sleeved outside the housing 750 , so as to not only absorb the vibration generated by the rotation of the rotor, but also reduce the noise generated by the flow of air in the air flow channel 640 .

[0103] Thus far, the present application satisfactorily describes the structure of an electric air pump.

[0104] Those skilled in the art will appreciate that the electric air pump can inflate and deflate almost all inflatable products, such as an inflatable mattress, an inflatable pool, an inflatable castle or an inflatable base of an inflatable boat.

[0105] The exemplary embodiments disclosed in the present application may be subjected to various substitutions, combinations or modifications. Without departing from the essence of the present application, all these modifications still belong to the concept of the present application and fall within the scope of protection defined by the claims of the present application.

[0106] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An electric air pump, characterized in that: include: A housing, comprising an air inlet and an air outlet, and defining an air passage, wherein the air passage communicates the air inlet and the air outlet; a brushless motor installed in the airway; as well as A controller, installed in the airway and electrically connected to the brushless motor; Wherein, the brushless motor defines an air flow channel, and the air flow channel connects the air inlet and the air outlet.

2. The electric air pump according to claim 1, wherein: The electric air pump also includes: A bracket, contained in the housing and defining a limiting cavity; Wherein, the brushless motor is installed in the limiting cavity.

3. The electric air pump according to claim 2, wherein: The electric air pump also includes: The vibration reduction element is sandwiched between the brushless motor and the cavity wall of the limiting cavity.

4. The electric air pump according to claim 3, wherein: The vibration-damping element includes a bushing.

5. The electric air pump according to claim 1, wherein: The area of ​​the air inlet is not less than 70% of the area of ​​the air outlet.

6. The electric air pump according to claim 1, wherein: The electric air pump includes a plurality of air inlets, and a total area of ​​the plurality of air inlets is not less than 70% of an area of ​​the air outlet.

7. The electric air pump according to claim 1, wherein: The brushless motor further comprises an axial flow fan and a motor shaft. The motor shaft drives the axial flow fan to rotate, and the axial flow fan is arranged at one end of the air flow channel close to the air inlet.

8. The electric air pump according to claim 7, wherein: The brushless motor comprises an inner shell and an outer shell sleeved outside the inner shell, and the inner shell and the outer shell define the air flow channel.

9. The electric air pump according to claim 8, wherein: The brushless motor further includes a plurality of guide plates, which are arranged in the air flow channel, and each of the guide plates connects the inner shell and the outer shell.

10. The electric air pump according to claim 9, wherein: The guide plate, the inner shell and the outer shell are made of metal and are integrally formed.

11. The electric air pump according to claim 9, wherein: Each guide plate and the axial direction of the brushless motor form an acute angle.

12. The electric air pump according to claim 11, wherein: Each of the guide plates has a curved surface, wherein a slope of the curved surface relative to an axial direction of the brushless motor gradually decreases in a direction from the air inlet to the air outlet.

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