A rear cover assembly and a clothes drying apparatus

Abstract

The application provides a rear cover assembly and a clothes drying device, which comprises a rear cover shell and a turnover mechanism. The rear cover shell has a first side wall and a second side wall. The first end of the turnover mechanism is connected with a fixed fulcrum. The turnover mechanism has a flow blocking surface, a first flow guide surface facing the first side wall, and a second flow guide surface facing the second side wall. At least part of the flow blocking surface is formed by extending from the first flow guide surface towards the first side wall, and / or at least part of the flow blocking surface is formed by extending from the second flow guide surface towards the second side wall. The fixed fulcrum divides the rear cover shell into a first air duct and a second air duct. The turnover mechanism switches between a first limit position in which the first air duct is opened and the second air duct is closed, and a second limit position in which the first air duct is closed and the second air duct is opened. In the embodiments of the application, no matter whether the impeller rotates forward or reversely, the rear cover assembly can output a larger air volume. When the air flow reverses to the position of the turnover mechanism, it is blocked by the flow blocking surface, which can effectively reduce the vortex phenomenon and improve the air volume of the impeller.

Description

Technical Field

[0001] This application relates to the field of clothing care technology, and in particular to a back cover assembly and a drying device. Background Technology

[0002] Taking a clothes drying device as an example, the clothes drying device is equipped with an impeller and a drying air duct. The impeller rotates to drive the airflow, and the airflow enters the cylinder of the clothes processing device under the guidance of the drying air duct to achieve the purpose of drying clothes.

[0003] Clothes drying equipment typically uses a single motor to drive both the impeller and the drying drum simultaneously. As people's living standards improve, users require the drying drum to provide a certain airflow in both forward and reverse rotation when drying delicate garments such as wool. This necessitates the motor rotating in both directions, which in turn causes the impeller to rotate in either direction. In related technologies, the sidewall of the volute protrudes inward to form a volute tongue. When the impeller rotates forward within the volute, the volute tongue cuts the airflow, resulting in a large airflow. When the impeller rotates in reverse, the airflow decreases drastically, becoming too low to meet the required drying performance. Summary of the Invention

[0004] In view of this, the embodiments of this application aim to provide a rear cover assembly and a clothes drying device that have a large air volume in both forward and reverse rotation of the impeller.

[0005] This application provides a rear cover assembly, including:

[0006] The rear cover has a first sidewall and a second sidewall that are disposed opposite to each other;

[0007] A flipping mechanism, wherein a first end of the flipping mechanism is connected to a fixed fulcrum, and the flipping mechanism is adapted to rotate about the fixed fulcrum; the flipping mechanism has a flow-blocking surface, a first flow-guiding surface facing the first sidewall, and a second flow-guiding surface facing the second sidewall, wherein at least a portion of the flow-blocking surface extends from the first flow-guiding surface toward the first sidewall, and / or, at least a portion of the flow-blocking surface extends from the second flow-guiding surface toward the second sidewall;

[0008] The fixed fulcrum divides the rear cover into a first air duct and a second air duct; the flipping mechanism swings about its first end to switch between a first extreme position where the first air duct is open and the second air duct is closed, and a second extreme position where the first air duct is closed and the second air duct is open.

[0009] In some embodiments, an impeller mounting area is provided between the first sidewall and the second sidewall, and the rear cover assembly includes a volute tongue fixedly disposed within the rear cover housing, the volute tongue being disposed on the air outlet side of the impeller mounting area and located between the first sidewall and the second sidewall.

[0010] In some embodiments, the first guide surface and the second guide surface extend away from each other in a direction away from the fixed fulcrum, and at least a portion of the flow-blocking surface is disposed between the first guide surface and the second guide surface.

[0011] In some embodiments, when the flipping mechanism flips to a first extreme position, the first guide surface and the first sidewall define a first flow channel communicating with the first air duct; and / or, when the flipping mechanism flips to a second extreme position, the second guide surface and the second sidewall define a second flow channel communicating with the second air duct;

[0012] Wherein, the effective length of the flipping mechanism is greater than the distance from the fixed fulcrum to the first side wall, or the effective length of the flipping mechanism is greater than the distance from the fixed fulcrum to the second side wall.

[0013] In some embodiments, a portion of the second sidewall protrudes inward to form a protrusion, and the rear cover assembly includes a partition unit disposed in the upper region of the protrusion.

[0014] In some implementations, the partition unit includes a first partition that contacts a stop of the flipping mechanism when the flipping mechanism is flipped to a first extreme position.

[0015] In some implementations, the portion of the second sidewall that is blocked by the first partition is provided with a wire passage hole, which is used for the wire harness to enter and exit the rear cover.

[0016] In some implementations, a first end of the first partition is connected to the upper region of the protrusion, and a second end of the first partition is bent toward the upper side of the protrusion.

[0017] In some embodiments, the partition unit includes a second partition disposed in the upper region of the protrusion, and the angle between the second partition and the tangent of the location of the second sidewall does not exceed 90°.

[0018] In some embodiments, the flipping mechanism includes a first plate and a second plate, the first plate and the second plate extending away from each other from their connection point in a direction away from the fixed fulcrum, the surface of the first plate opposite to the second plate defining the first guide surface, and the surface of the second plate opposite to the first plate defining the second guide surface.

[0019] In some embodiments, the flipping mechanism includes a third plate, the first plate, the third plate, and the second plate are connected in sequence, and the surface of the third plate opposite to the fixed fulcrum defines the flow-blocking surface.

[0020] In some implementations, the end of the third plate away from the second plate extends beyond the first plate and toward the first sidewall to form a first extension segment. When the flipping mechanism is in the second extreme position, the end of the first extension segment abuts against the first sidewall.

[0021] In some embodiments, the flipping mechanism includes a flap and a baffle, a first end of the flap being connected to the fixed fulcrum, the baffle being connected to the second end of the flap, two opposing surfaces of the flap defining the first guide surface and the second guide surface, and the surface of the baffle on the side opposite to the fixed fulcrum defining the flow blocking surface.

[0022] In some embodiments, the volute tongue includes a first peripheral wall, a second peripheral wall, and a third peripheral wall connected in sequence. The first peripheral wall is disposed near the impeller mounting area and is formed as an arc-shaped segment matching the outer contour of the impeller. The second peripheral wall and the third peripheral wall extend from both ends of the first peripheral wall toward a direction away from the impeller and are close to each other. The transition joint between the first peripheral wall and the second peripheral wall defines one volute tongue portion, and the transition joint between the first peripheral wall and the third peripheral wall defines the other volute tongue portion.

[0023] In some embodiments, along the axial direction of the impeller mounting area, the volute tongue includes a first segment and a second segment, the first segment being integrally formed with the rear cover, and the second segment and the first segment being spliced ​​together axially.

[0024] In some embodiments, the outer surface of the first segment is provided with a first bearing seat, the outer surface of the second segment is provided with a second bearing seat, and the flipping mechanism is provided with shaft portions at both ends along the axial direction, one of the shaft portions being supported on the first bearing seat and the other shaft portion being supported on the second bearing seat.

[0025] This application provides a clothes drying device, including:

[0026] A clothes dryer, wherein an air inlet is provided at the rear end of the clothes dryer;

[0027] Circulating air duct;

[0028] impeller;

[0029] And the rear cover assembly described in any embodiment of this application, wherein the impeller is disposed inside the rear cover housing, the impeller guides the airflow flowing through the circulating air duct to the rear cover housing, and the airflow inside the rear cover housing enters the drying drum through the air inlet.

[0030] The rear cover assembly of this application embodiment can output a large air volume regardless of whether the impeller rotates forward or backward.

[0031] In the rear cover assembly of this application embodiment, when the airflow flows backward along the first or second sidewall to the position of the flipping mechanism, it is blocked by the baffle surface. The baffle surface prevents the airflow from continuing to flow backward. Therefore, it can effectively reduce the vortex phenomenon at the impeller outlet and increase the airflow of the impeller. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the rear cover assembly and impeller according to an embodiment of this application;

[0033] Figure 2 for Figure 1 A schematic diagram of the structure shown from another perspective;

[0034] Figure 3 for Figure 2 A schematic diagram of the flipping mechanism and the volute tongue in the middle;

[0035] Figure 4 for Figure 3 A schematic diagram of the flipping mechanism from another perspective;

[0036] Figure 5 for Figure 1 The rear view of the structure shown shows the flipping mechanism in the first extreme position. The dashed lines and arrows in the figure indicate the airflow path.

[0037] Figure 6 for Figure 5 A schematic diagram of the flipping mechanism after it has flipped to the second extreme position. The dotted lines and arrows in the diagram indicate the airflow path.

[0038] Figure 7 This is a schematic diagram of a clothes drying device according to an embodiment of this application;

[0039] Figure 8 for Figure 7 The rear cover assembly is shown in a partial cross-sectional schematic diagram, with dashed lines and arrows indicating airflow paths.

[0040] Figure 9 This is a schematic diagram of a laryngeal mask assembly and impeller according to another embodiment of this application;

[0041] Figure 10 This is a schematic diagram of a laryngeal mask assembly and impeller according to another embodiment of this application.

[0042] Explanation of reference numerals in the attached figures

[0043] Rear cover assembly 100;

[0044] Rear cover 11; back plate 111; side plate 112; first flow channel 11a; second flow channel 11b; impeller mounting area 11c; air supply area 11d; first air duct 11h; second air duct 11g; first side wall 1121; second side wall 1122; wire through hole 1122a; protrusion 11221;

[0045] Tilting mechanism 12; First guide surface 121a; Second guide surface 122a; Baffle surface 123a; First plate 121; First reinforcing rib 1211; Second plate 122; Second reinforcing rib 1221; Third plate 123; Third reinforcing rib 1231; Vibration damping component 124; Shaft portion 125; Flip plate 126; Baffle plate 127;

[0046] Coil tongue 13; First coil tongue portion 13'; Second coil tongue portion 13″; First peripheral wall 13a; Second peripheral wall 13b; Third peripheral wall 13c; First sub-segment 131; First bearing seat 1311; Second sub-segment 132; Second bearing seat 1321; First partition 14; Second partition 15;

[0047] Impeller 2;

[0048] Rear panel 4;

[0049] Wire harness 51; Sealing plug 52; Detailed Implementation

[0050] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0051] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the appendix. Figure 7 The orientations or positional relationships shown are for the purpose of facilitating the description of the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] A rear cover assembly 100, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 It includes a rear cover 11 and a flipping mechanism 12.

[0053] Please see Figure 1 and Figure 2The rear cover 11 has a first sidewall 1121 and a second sidewall 1122 disposed opposite to each other. An impeller mounting area 11c and an air supply area 11d are interconnected between the first sidewall 1121 and the second sidewall 1122.

[0054] The impeller mounting area 11c is used to mount the impeller 2, and the first sidewall 1121 and the second sidewall 1122 are located on opposite sides of the impeller 2 in the circumferential direction.

[0055] During the rotation of the impeller 2, the impeller mounting area 11c draws in air from one axial side, and the airflow in the impeller mounting area 11c flows into the air supply area 11d and is then delivered outward through the air supply area 11d.

[0056] The flipping mechanism 12 has a flow-blocking surface 123a, a first flow-guiding surface 121a facing the first side wall 1121, and a second flow-guiding surface 122a facing the second side wall 1122. That is, the first flow-guiding surface 121a and the second flow-guiding surface 122a are located on opposite sides of the flipping mechanism 12 along the swing direction.

[0057] At least a portion of the flow-blocking surface 123a extends from the first flow-guiding surface 121a toward the first sidewall 1121, and / or at least a portion of the flow-blocking surface 123a extends from the second flow-guiding surface 122a toward the second sidewall 1122.

[0058] The first end of the tilting mechanism 12 is connected to a fixed fulcrum, and the tilting mechanism 12 is adapted to rotate around the fixed fulcrum. The swing axis of the tilting mechanism 12 is approximately parallel to the rotation axis of the impeller 2. The fixed fulcrum divides the rear cover 11 into a first air duct 11h and a second air duct 11g. Specifically, the first air duct 11h is located between the fixed fulcrum and the first side wall 1121, and the second air duct 11g is located between the fixed fulcrum and the second side wall 11g.

[0059] The flipping mechanism 12 swings about a fixed fulcrum at its first end, meaning the flipping mechanism 12 can flip between the first sidewall 1121 and the second sidewall 1122, reaching the first extreme position (refer to) when the first air duct 11h is opened and the second air duct 11g is closed. Figure 5 ), and, at the second extreme position when the first air duct is closed for 11h and the second air duct is opened for 11g (refer to Figure 6 Switch between )

[0060] It should be noted that the flipping mechanism 12 can directly abut against the first side wall 1121 or the second side wall 1122, or indirectly abut against the first side wall 1121 and the second side wall 1122. In short, when the flipping mechanism 12 is stopped at the first limit position or the second limit position, the first side wall 1121 or the second side wall 1122 provides support for the flipping mechanism 12.

[0061] Please see Figure 5 When the impeller 2 rotates forward, the flipping mechanism 12 is in the first extreme position, and the airflow in the impeller mounting area 11c enters the air supply area 11d through the flow channel between the first air duct 11h, the first guide surface 121a and the first side wall 1121.

[0062] Please see Figure 6 When the impeller 2 reverses, the flipping mechanism 12 is in the second extreme position, and the airflow in the impeller mounting area 11c enters the air supply area 11d through the flow channel between the second air duct 11g, the second guide surface 122a and the second side wall 1122.

[0063] It should be noted that in the embodiments of this application, "clockwise" and "counterclockwise" are only used to indicate that the rotation directions are opposite, and do not specifically refer to any particular direction. For example, in some embodiments, ... Figure 5 In this context, counter-clockwise is defined as forward rotation, and clockwise is defined as reverse rotation. In other embodiments, it can also be... Figure 5 In this context, clockwise rotation is defined as forward rotation, and counterclockwise rotation is defined as reverse rotation.

[0064] The rear cover assembly 100 of this application embodiment can output a large air volume regardless of whether the impeller 2 rotates forward or backward.

[0065] Taking the impeller 2 rotating forward as an example, a large amount of airflow enters the air supply zone 11d along the first sidewall 1121. Part of the airflow in the air supply zone will flow backward along the second sidewall. If the airflow is not blocked, a significant vortex will be generated at the impeller outlet, reducing the impeller's airflow volume.

[0066] In this embodiment of the application, when the airflow flows backward along the first sidewall 1121 or the second sidewall 1122 to the position of the flipping mechanism 12, it is blocked by the baffle surface 123a. The baffle surface 123a prevents the airflow from continuing to flow backward. Therefore, it can effectively reduce the vortex phenomenon generated when the airflow returns from the air supply zone 11d to the volute tongue 13 and increase the air volume of the impeller 2.

[0067] In some embodiments, such as Figure 3 As shown, the first guide surface 121a and the second guide surface 122a extend away from the fixed fulcrum and are far apart from each other. That is, along the direction away from the fixed fulcrum, the distance between the first guide surface 121a and the second guide surface 122a increases. At least a portion of the flow-blocking surface 123a is disposed between the first guide surface 121a and the second guide surface 122a to cover the gap between them.

[0068] In this embodiment, the rear cover assembly 100, since the first guide surface 121a and the second guide surface 122a extend away from the fixed support point and are far apart from each other, in the comparative embodiment where the shape and size of the first side wall 1121 and the second side wall 1122 remain unchanged, the flipping mechanism 12 of this application embodiment can make the gradual opening of the flow channels on both sides more reasonable, which can improve the flow separation phenomenon of airflow, facilitate the relatively uniform guidance of airflow to the air supply area 11d, and increase the air volume of the impeller.

[0069] In other embodiments, the distance between the first guide surface 121a and the second guide surface 122a remains constant along the direction away from the fixed fulcrum. For example, the two opposite sides of the same thin plate are the first guide surface 121a and the second guide surface 122a, respectively.

[0070] Please see Figure 1 and Figure 2 The rear cover assembly includes a volute 13, which is fixedly disposed within the rear cover housing 11. The volute 13 is located on the air outlet side of the impeller mounting area 11c, between the first sidewall 1121 and the second sidewall 1122. Specifically, the volute 13 is neither located on the first sidewall 1121 nor the second sidewall 1122, and remains relatively stationary with respect to the rear cover housing 11. This facilitates accurate positioning and calibration of the volute 13 during assembly. After assembly, the volute 13 will not interfere with the impeller 2. Therefore, the distance between the volute 13 and the rotation center of the impeller 2 remains unchanged. This allows for a smaller distance between the volute 13 and the rotation center of the impeller 2 during design and assembly, resulting in a compact rear cover assembly structure and ensuring stable air outlet performance.

[0071] It is understandable that the volute tongue 13 has a significant impact on the air volume of the impeller 2. The position and shape of the volute tongue 13 have a significant impact on the flow characteristics of the airflow. Therefore, once the design and manufacturing shape of the volute tongue 13 are determined, the installation position of the volute tongue 13 relative to the impeller 2 needs to be quite accurate and cannot be moved arbitrarily.

[0072] Please see Figure 1 The volute tongue 13 has a first volute tongue portion 13' and a second volute tongue portion 13″ at opposite ends along the circumference of the impeller 2. The first volute tongue portion 13' is located on the side of the volute tongue 13 facing the first sidewall 1121, and the first volute tongue 13 is spaced apart from the first sidewall 1121. The second volute tongue portion 13″ is located on the side of the volute tongue 13 facing the second sidewall 1122, and the second volute tongue 13 is spaced apart from the second sidewall 1122.

[0073] Please see Figure 5 During the forward rotation of impeller 2, the second volute tongue 13″ is located on the leeward side of volute tongue 13, while the first volute tongue 13' is located on the windward side of volute tongue 13, thus cutting the airflow. Please refer to Figure 6 During the reverse rotation of impeller 2, the first volute tongue 13' is located on the leeward side of volute tongue 13, and the second volute tongue 13″ is located on the windward side of volute tongue 13, thus cutting the airflow.

[0074] The first end of the flipping mechanism 12 near the volute tongue 13 is rotatably connected to the rear cover 11 and / or the volute tongue 13. That is, the flipping mechanism 12 can be installed on the rear cover 11, or on the volute tongue 13, or the flipping mechanism 12 can be installed together by the rear cover 11 and the volute tongue 13.

[0075] The power source for the flipping mechanism 12 is not limited. For example, in some embodiments, the rear cover assembly 100 includes a drive motor that drives the flipping mechanism 12 to flip. In other embodiments, the flipping mechanism 12 flips under the action of the wind force of the impeller 2. That is, the flipping mechanism 12 is driven by the wind force of the impeller 2 to flip, without the need for an additional power device. The flipping mechanism 12 can be flipped simply by changing the rotation direction of the impeller 2.

[0076] For example, please refer to Figure 5 When the flipping mechanism 12 flips to the first limit position, the first guide surface 121a and the first sidewall 1121 define a first flow channel 11a that communicates with the first air duct 11h; and / or, when the flipping mechanism 12 flips to the second limit position, the second guide surface 122a and the second sidewall 1122 define a second flow channel 11b that communicates with the second air duct 11g.

[0077] The effective length of the flipping mechanism 12 is greater than the distance from the fixed fulcrum to the first side wall 1121, or the effective length of the flipping mechanism 12 is greater than the distance from the fixed fulcrum to the second side wall 1122.

[0078] Thus, in the first extreme position, the flipping mechanism 12 can directly or indirectly abut against the second side wall 1122, and in the second extreme position, the flipping mechanism 12 can directly or indirectly abut against the first side wall 1121. The effective length refers to the straight-line distance between the part of the flipping mechanism 12 furthest from the fixed fulcrum and the fixed fulcrum, which is the maximum radius corresponding to the swing trajectory of the flipping mechanism 12 around the fixed fulcrum.

[0079] It should be noted that in some embodiments, when the flipping mechanism 12 is in any extreme flipping position, the part of the flipping mechanism 12 furthest from the fixed fulcrum can abut against the first side wall 1121 or against the second side wall 1122. In other embodiments, the part of the flipping mechanism 12 furthest from the fixed fulcrum will neither abut against the first side wall 1121 nor against the second side wall 1122.

[0080] Please see Figure 5The first flow channel 11a gradually widens, and the widening degree β is within an appropriate range. That is, along the flow direction of the airflow in the first flow channel 11a, the width of the first flow channel 11a tends to increase. For example, please refer to... Figure 1 and Figure 2 The second sidewall 1122 partially protrudes inward to form a protrusion 11221. The air supply area 11d and the impeller mounting area 11c are located on opposite sides of the protrusion 11221. Figure 1 and Figure 2 The two opposite sides along the vertical direction. The dividing point is the most prominent vertex of the protrusion 11221. (See also...) Figure 6 The protrusion 11221 includes an upper region 11221' and a lower region 11221″, with the upper region 11221' facing the air supply area 11d and the lower region 11221″ facing the impeller mounting area 11c.

[0081] For example, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The rear cover assembly 100 includes a baffle unit disposed in the upper region 11221' of the protrusion 11221. The baffle unit is used to block the airflow entering the air supply zone 11d from flowing backward along the inner surface of the second sidewall towards the volute tongue. Specifically, the airflow entering the air supply zone 11d is blocked by the baffle unit, which prevents the airflow from continuing to flow backward. Therefore, it can effectively reduce the vortex phenomenon generated at the volute tongue 13 in the air supply zone 11d, and increase the air volume of the impeller 2.

[0082] Furthermore, since the baffle unit is located in the upper region 11221' of the protrusion 11221, the baffle unit will not have a significant impact on the airflow cutting the volute tongue 13.

[0083] The specific structure of the partition unit is not limited.

[0084] For example, in some embodiments, the partition unit includes a first partition 14. When the flipping mechanism 12 flips to the first extreme position, the first partition 14 contacts the stop of the flipping mechanism 12, that is, the second end of the flipping mechanism 12 away from the volute tongue 13 contacts the first partition 14, but does not directly contact the second sidewall 1122. It should be noted that the contact area between the flipping mechanism 12 and the first partition 14 is basically airtight, and the airflow in the air supply zone 11d will not flow backward from the contact area between the two.

[0085] When the flipping mechanism 12 flips to the second limit position, that is, the limit position close to the first side wall 1121, the surface of the first partition 14 and the second guide surface 122a define a second flow channel 11b that communicates with the second air duct 11g.

[0086] In this embodiment, the first partition 14 can reduce the flipping angle of the flipping mechanism 12 when switching between the first extreme position and the second extreme position, making it easier for the flipping mechanism 12 to flip into place.

[0087] Furthermore, the first baffle 14 can prevent the airflow entering the air supply zone 11d from flowing backwards along the inner surface of the second sidewall towards the volute tongue. Specifically, the airflow entering the air supply zone 11d is blocked by the first baffle 14, which prevents the airflow from continuing to flow backwards. Therefore, it can effectively reduce the vortex phenomenon generated at the volute tongue 13 in the air supply zone 11d and increase the air volume of the impeller 2.

[0088] Furthermore, since the first partition 14 is located in the upper region 11221' of the protrusion 11221, the end of the flipping mechanism 12 away from the volute tongue 13 will also extend into the air supply zone 11d and contact the stop of the first partition 14. Since the first partition 14 can support the flipping mechanism 12, the flipping mechanism 12 does not need to directly contact the protrusion 11221. Therefore, the protrusion 11221 can be arranged as close as possible to the impeller mounting area 11c, making the rear cover assembly 100 structure more compact and freeing up more space in the air supply zone 11d, which is convenient for installing electrical components in the air supply zone 11d. In addition, the first partition 14 will not have a significant impact on the volute tongue 13 cutting the airflow.

[0089] The specific shape of the first partition 14 is not limited. For example, it can be a straight or curved plate.

[0090] For example, the first end of the first partition 14 is connected to the second sidewall 1122, and the second end of the first partition 14 is bent toward the side away from the impeller mounting area 11c. This facilitates guiding the airflow to the air supply area 11d and avoids interference with the flipping process of the flipping mechanism 12.

[0091] For example, please refer to Figure 5 and Figure 6 The portion of the second sidewall 1122 that is covered by the first partition 14 is provided with a wire through hole 1122a, which is used to allow the wire harness 51 to enter and exit the back cover 11.

[0092] Specifically, when electrical components need to be installed inside the rear housing 11, the wiring harness 51 can provide communication / power to the electrical components. During assembly, the wiring harness 51 is inserted into the sealing plug 52, which is sealed and embedded in the wire through hole 1122a to prevent air leakage at the wire through hole 1122a.

[0093] In this embodiment, since the first partition 14 blocks the wire through hole 1122a, the wire harness 51 passes through the wire through hole 1122a into the rear cover 11. During the flipping process of the flipping mechanism 12, the first partition 14 can separate the wire harness 51 from the flipping mechanism 12, prevent the wire harness 51 from getting tangled with the flipping mechanism 12, prevent the flipping mechanism 12 from pinching or damaging the wire harness 51, protect the wire harness 51, and improve the reliability of the rear cover assembly 100.

[0094] The specific shape of the through hole 1122a is not limited. The through hole 1122a can be a circular hole or an edge extending to the open side of the second sidewall 1122, so that the sealing plug 52 can be inserted into the through hole 1122a along the open side.

[0095] For example, in some embodiments, please refer to Figure 1 and Figure 2 The partition unit includes a second partition 15, please refer to [link / reference]. Figure 5 , Figure 6 and Figure 10 The second baffle 15 is disposed in the upper region 11221' of the protrusion 11221, and the angle δ between the tangents of the second sidewall 1122 and the second sidewall 1122 does not exceed 90°, for example, the two are perpendicular to each other. The second baffle 15 is used to block the airflow entering the air supply zone 11d from flowing backward along the inner surface of the second sidewall towards the volute tongue, and the airflow does not flow obliquely downward along the surface of the second baffle 15. Specifically, the airflow entering the air supply zone 11d is blocked by the second baffle 15, which prevents the airflow from continuing to flow backward. Therefore, the vortex phenomenon generated at the volute tongue 13 in the air supply zone 11d can be effectively reduced, thereby increasing the air volume of the impeller 2.

[0096] It is understood that in some embodiments, the partition unit may only have the first partition 14 described above, without the second partition 15; in other embodiments, the partition unit may only have the second partition 15 described above, without the first partition 14; and in still other embodiments, the partition unit has both the first partition 14 and the second partition 15 described above. That is to say, the partition unit of the embodiments of this application includes the first partition 14 and / or the second partition 15.

[0097] It should be noted that in the embodiment where the partition unit includes a first partition 14 and a second partition 15, the second partition 15 is disposed on the upper side of the first partition 14 along the second sidewall 1122 and close to the first partition. That is, the second partition 15 is disposed adjacent to the first partition 14. Thus, when the flipping mechanism 12 is positioned against the first partition 14, the airflow entering the air supply zone 11d is doubly blocked by the second partition 15 and the baffle surface 123a, which can effectively prevent the airflow in the air supply zone 11d from flowing back to the volute tongue and generating vortices, thereby increasing the air volume.

[0098] The specific structure of the flipping mechanism 12 is not limited.

[0099] For example, please refer to Figure 3 , Figure 4 and Figure 9 The flipping mechanism 12 includes a first plate 121 and a second plate 122. Specifically, the first end of the first plate 121 and the first end of the second plate 122 are connected, and the connection point is located at the end of the flipping mechanism 12 near the fixed support point.

[0100] The first plate 121 and the second plate 122 extend away from each other from their connection point in a direction away from the volute tongue 13. The surface of the first plate 121 facing away from the second plate 122 defines a first guide surface 121a, and the surface of the second plate 122 facing away from the first plate 121 defines a second guide surface 122a. In this embodiment, the first guide surface 121a and the second guide surface 122a extend away from each other in a direction away from the fixed fulcrum. That is, along the direction away from the fixed fulcrum, the distance between the first guide surface 121a and the second guide surface 122a increases. Therefore, in the comparative embodiment where the shape and size of the first sidewall 1121 and the second sidewall 1122 remain unchanged, the flipping mechanism 12 of this application embodiment can make the gradual opening of the flow channels on both sides more reasonable, which can improve the flow separation phenomenon of airflow, facilitate the relatively uniform guidance of airflow to the air supply area 11d, and increase the air volume of the impeller.

[0101] For example, please refer to Figure 3 , Figure 4 In the first embodiment, the flipping mechanism further includes a third plate 123. The first plate 121, the third plate 123 and the second plate 122 are connected in sequence. The third plate 123 is connected to the second end of the first plate 121 and the second end of the second plate 122. That is, the third plate 123 is located at the end of the flipping mechanism 12 away from the fixed support point.

[0102] In other words, the flipping mechanism 12 roughly forms a triangular frame structure. The surface of the third plate 123 on the side opposite to the fixed fulcrum defines the flow-blocking surface 123a.

[0103] The flipping mechanism 12 of this embodiment has both good structural strength and a light weight.

[0104] It should be noted that the first plate 121, the second plate 122, and the third plate 123 can be integrally molded structures, such as one-piece injection molded parts, or they can be separate structures assembled together.

[0105] For example, please refer to Figure 3 and Figure 4The inner surface of the first plate 121 is provided with a first reinforcing rib 1211, the inner surface of the second plate 122 is provided with a second reinforcing rib 1221, and the inner surface of the third plate 123 is provided with a third reinforcing rib 1231. The first reinforcing rib 1211, the second reinforcing rib 1221, and the third reinforcing rib 1231 are connected end to end to form a triangular reinforcing rib structure to further enhance the structural strength of the flipping mechanism 12.

[0106] For example, please refer to Figure 4 The end of the third plate 123 away from the second plate 122 extends beyond the first plate 121 and toward the first sidewall 1121 to form a first extension segment 1232. (See also...) Figure 6 When the flipping mechanism is in the second extreme position, the end of the first extension 1232 abuts against the first sidewall 1121. In this embodiment, the first extension 1232 is part of the third plate 123.

[0107] Since the surface of the first extension section 1232 and the second guide surface 122a of the second plate 122 have a certain angle, the first extension section 1232 is conducive to guiding the airflow to the second guide surface 122a, increasing the angle between the airflow direction and the second guide surface 122a. For example, the airflow direction acts on the second guide surface 122a at an angle of about 90°. In this way, the flipping torque of the airflow on the flipping mechanism can be increased, and the reliability of the flipping mechanism flipping from the second limit position to the first limit position under the action of wind can be improved.

[0108] Please see Figure 9 In the second embodiment, the main differences between the structure of the flipping mechanism and the first embodiment described above include: the flipping mechanism 12 does not include a third plate 123, and the surface of the first plate 121 facing the second plate 122 and the surface of the second plate 122 facing the first plate 121 define a flow-blocking surface 123a. For example, the flipping mechanism 12 is generally V-shaped.

[0109] Please see Figure 10 In the third embodiment, the flipping mechanism 12 includes a flap 126 and a baffle 127. The first end of the flap 126 is connected to the rear cover 11 and / or the volute tongue 13, that is, the swing center of the flipping mechanism 12 is located at the first end of the flap 126. The baffle 127 is connected to the second end of the flap 126. The baffle 127 protrudes at least from one lateral side of the flap 126. The two opposing surfaces of the flap 126 define a first guide surface 121a and a second guide surface 122a. The surface of the baffle 127 on the side away from the fixed fulcrum defines a flow-blocking surface 123a.

[0110] The lateral side refers to any side along the thickness direction of the flap 126, that is, the side of the flap 126 facing the first sidewall 1121 or the side facing the second sidewall 1122.

[0111] In an embodiment where the baffle 127 protrudes only from one side of the flip plate 126, the flipping mechanism 12 is approximately in the shape of a "7"; in an embodiment where the baffle 127 protrudes from both sides of the flip plate 126, the flipping mechanism 12 is approximately in the shape of a "T".

[0112] For example, please refer to Figure 3 The air guiding device includes at least two damping elements 124. The damping elements 124 are disposed at the end of the flipping mechanism 12 away from the volute tongue 13. The second end of the flipping mechanism 12 abuts against the first side wall 1121 and the first partition 14 mentioned above through each damping element 124.

[0113] The damping element 124 is made of a material with cushioning and vibration damping properties, such as rubber, foam plastic, sponge, etc. In this embodiment, the damping element 124 can prevent the flipping mechanism 12 from directly impacting the first side wall 1121 or the first partition 14, thereby avoiding the generation of a harsh impact sound and reducing the risk of breakage of the flipping mechanism 12 due to prolonged impact.

[0114] The specific structural shape of the vibration damper 124 is not limited.

[0115] The specific location and structure of the damping component 124 on the flipping mechanism are not limited.

[0116] In some embodiments, in the embodiment where the first extension 1232 is provided, one of the damping members 124 can be mounted on the first extension 1232, the first extension 1232 providing a mounting position for the damping member 124.

[0117] In other embodiments, the first extension segment 1232 described above may not be provided. Specifically, the first end of the first plate 121 extends beyond the third plate 123 and extends in a direction away from the fixed support point to form a second extension segment, wherein a vibration damping member 124 is mounted on the second extension segment 1231. In this embodiment, the second extension segment is a part of the first plate.

[0118] In some embodiments, the end of the third plate 123 away from the first plate 121 extends beyond the second plate 122 and toward the second sidewall 1122 to form a third extension segment, and another damping member 124 is mounted on the third extension segment. In this embodiment, the third extension segment is part of the third plate, and the construction of the third extension segment is similar to that of the first extension segment 1232 described above.

[0119] In other embodiments, please refer to Figure 4The second plate 122 extends beyond the third plate 123 and in a direction away from the fixed support point to form a fourth extension 1222. A vibration damper 124 is mounted on the fourth extension 1222. In this embodiment, the fourth extension 1222 is a part of the second plate 122.

[0120] Please see Figure 6 When the tilting mechanism is in the second extreme position, impeller 2 moves along... Figure 2 When rotated clockwise, the second plate 122 provides good airflow guidance, and the fourth extension 1222 does not obstruct airflow. For example, please refer to... Figure 3 Along the axial direction of the impeller mounting area 11c, the volute tongue 13 includes a first segment 131 and a second segment 132, wherein the first segment 131 and the rear cover 11 are integrally formed. The second segment 132 and the first segment 131 are spliced ​​together along the axial direction.

[0121] During assembly, the second segment 132 is attached to the axial side of the first segment 131, and the screw is passed through the second segment 132 and screwed into the first segment 131.

[0122] In this embodiment, since the first segment 131 and the rear cover 11 are integrally formed, the structural strength of the connection between the volute tongue 13 and the rear cover 11 can be improved.

[0123] For example, please refer to Figure 3 The outer surface of the first segment 131 is provided with a first bearing seat 1311, and the outer surface of the second segment 132 is provided with a second bearing seat 1321. Please refer to [link / reference]. Figure 4 The flipping mechanism 12 has shaft portions 125 at both ends along the axial direction. One shaft portion 125 is supported on the first bearing seat 1311, and the other shaft portion 125 is supported on the second bearing seat 1321. That is to say, the flipping mechanism 12 is installed on the outside of the volute tongue 13 and does not extend into the inside of the volute tongue 13.

[0124] During assembly, first insert one shaft 125 of the flipping mechanism 12 into the first bearing 1311 of the first segment 131. Then, align the second segment 132 axially with the first segment 131 and align the second bearing 1321 with the other shaft 125 of the flipping mechanism 12. Then, fit the second bearing 1321 onto the other shaft 125. Screws pass through the second segment 132 and are screwed into the first segment 131. The installation and positioning of the flipping mechanism 12 are achieved by splicing the second segment 132 and the first segment 131. The structure is simple and the assembly process is also simple.

[0125] For example, please refer to Figure 1The worm tongue 13 includes a first peripheral wall 13a, a second peripheral wall 13b, and a third peripheral wall 13c connected in sequence. The transition between the first peripheral wall 13a and the second peripheral wall 13b defines one of the worm tongue portions, namely the first worm tongue portion 13', and the transition between the first peripheral wall 13a and the third peripheral wall 13c defines another worm tongue portion, namely the second worm tongue portion 13″.

[0126] It should be noted that the first peripheral wall 13a, the second peripheral wall 13b, and the third peripheral wall 13c have a certain extension dimension along the rotation axis of the impeller 2. In the embodiment where the volute tongue 13 is formed by splicing the first sub-segment 131 and the second sub-segment 132, a portion of the first peripheral wall 13a is located on the first sub-segment 131 along the axial direction, and another portion is located on the second sub-segment 132 along the axial direction. Similarly, a portion of the second peripheral wall 13b is located on the first sub-segment 131 along the axial direction, and another portion is located on the second sub-segment 132 along the axial direction. A portion of the third peripheral wall 13c is located on the first sub-segment 131 along the axial direction, and another portion is located on the second sub-segment 132 along the axial direction.

[0127] The first peripheral wall 13a is located near the impeller mounting area 11c and is formed as an arc segment that matches the outer contour of the impeller 2; thus, the volute tongue 13 can be located as close as possible to the impeller 2 without interfering with it.

[0128] It should be noted that if a large amount of airflow passes through the gap between the first peripheral wall 13a and the impeller 2, this portion of airflow will continue to circulate in the space around the impeller 2 and will not be delivered from the rear cover 11. This will increase the energy consumption of the impeller 2 and reduce the airflow of the rear cover assembly 100.

[0129] In the embodiments of this application, the distance between the first peripheral wall 13a and the impeller 2 can be controlled to a minimum safe distance, reducing the amount of air discharged through the gap between the first peripheral wall 13a and the impeller 2, and further increasing the air volume of the rear cover assembly 100. In addition, regardless of whether the impeller 2 rotates clockwise or counterclockwise, the gap between the first peripheral wall 13a and the impeller 2 is small, and the rear cover assembly 100 has a large air volume.

[0130] The second peripheral wall 13b and the third peripheral wall 13c extend from both ends of the first peripheral wall 13a toward the direction away from the impeller 2 and are close to each other. In this embodiment, the second peripheral wall 13b extends from the first end of the first peripheral wall 13a toward the direction away from the impeller 2 and toward the centerline of the first peripheral wall 13a, and the third peripheral wall 13c extends from the second end of the first peripheral wall 13a toward the direction away from the impeller 2 and toward the centerline of the first peripheral wall 13a, so that the second peripheral wall 13b and the third peripheral wall 13c form a guide slope.

[0131] The centerline of the first peripheral wall 13a refers to the centerline of symmetry of the projection of the first peripheral wall 13a in the plane projection perpendicular to the rotation axis of the impeller 2.

[0132] When impeller 2 rotates forward, the second circumferential wall 13b guides the airflow to exit through the first flow channel 11a. When impeller 2 rotates in reverse, the third circumferential wall 13c guides the airflow to exit through the second flow channel 11b.

[0133] Furthermore, in this embodiment, the angle between the second peripheral wall 13b and the first peripheral wall 13a is an acute angle, and the transition connection between the two is formed into an arc-shaped first volute tongue 13', so that the first volute tongue 13' can better cut the airflow.

[0134] The angle between the third circumferential wall 13c and the first circumferential wall 13a is an acute angle, and the transition connection between the two forms an arc-shaped second volute tongue 13″. In this way, the second volute tongue 13″ can better cut the airflow.

[0135] The specific shape of the rear cover 11 can be adapted to the application.

[0136] For example, in some embodiments, the interior of the rear cover 11 forms a relatively enclosed space.

[0137] In other embodiments, please refer to Figure 1 and Figure 2 The rear cover 11 is open on the side where air enters along the impeller 2. Both the air inlet and the air duct of the rear cover 11 are located at the open portion of the rear cover 11. The remaining area outside the air inlet and air duct at the open portion of the rear cover 11 is designated as a closed area. This closed area is covered by certain parts of the product being used, forming a relatively enclosed space. In this embodiment, both the air inlet and the air duct of the rear cover 11 are located on the same side of the rear cover 11.

[0138] For example, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The rear casing 11 includes a back plate 111 and side plates 112. The back plate 111 is located on one axial side of the impeller 2, wherein the back plate 111 and the air inlet side of the impeller 2 are located on opposite axial sides of the impeller 2. The side plates 112 are arranged around the edge of the back plate 111, and the back plate 111 and the side plates 112 define an open space. The opposite sides of the side plates 112 are respectively the first side wall 1121 and the second side wall 1122.

[0139] The application fields of the air guiding device in this application embodiment are not limited. Exemplarily, this application embodiment describes the application of the air guiding device in a clothes drying equipment.

[0140] This application provides a clothes drying device, including a housing, a drying drum, a circulating air duct, an impeller 2, a motor, and an air guide device according to any embodiment of this application.

[0141] The clothes dryer is located inside the cabinet, and an air inlet is located at the rear end of the clothes dryer.

[0142] For example, the first end of the motor shaft is used to output driving force to the dryer, for instance, the first end of the motor shaft drives the dryer to rotate via a belt. The second end of the motor shaft drives the impeller 2 to rotate. That is, the motor shaft drives both the dryer and the impeller 2 to rotate simultaneously.

[0143] The impeller guides the airflow through the circulation duct to the rear cover 11, and the airflow inside the rear cover 11 enters the drying drum through the air inlet. Specifically, during the rotation of the impeller 2, the airflow inside the rear cover 11 is pumped into the drying drum. At the same time, a negative pressure is generated at the air inlet of the impeller 2, and the airflow in the circulation duct is replenished into the rear cover 11 under the action of the negative pressure.

[0144] For example, the enclosure includes a left support plate, a right support plate, and a rear panel 4 (see reference). Figure 7 and Figure 8 The back panel 4 is connected between the left support plate and the right support plate.

[0145] The assembly relationship between the air guide device and the housing is not limited. For example, in some embodiments, the air guide device is located on the rear side of the rear back panel 4 of the housing, the front side of the rear cover 11 is open, and the rear back panel 4 closes the area to be closed at the open part of the rear cover 11. The rear back panel 4 is provided with ventilation holes, which are located at the open part of the rear cover 11. The airflow from the rear cover 11 enters the drying drum through the ventilation holes and air inlet holes.

[0146] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0147] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A rear cover assembly, characterized in that, include: The rear cover has a first sidewall and a second sidewall that are disposed opposite to each other; A flipping mechanism, wherein a first end of the flipping mechanism is connected to a fixed fulcrum, and the flipping mechanism is adapted to rotate about the fixed fulcrum; the flipping mechanism has a flow-blocking surface, a first flow-guiding surface facing the first sidewall, and a second flow-guiding surface facing the second sidewall. At least a portion of the flow-blocking surface extends from the first flow-guiding surface toward the first sidewall, and / or at least a portion of the flow-blocking surface extends from the second flow-guiding surface toward the second sidewall; The fixed fulcrum divides the rear cover into a first air duct and a second air duct; the flipping mechanism swings around its first end to switch between a first extreme position where the first air duct is open and the second air duct is closed, and a second extreme position where the first air duct is closed and the second air duct is open. The flipping mechanism includes a first plate, a second plate, and a third plate, which are sequentially connected. The first plate and the second plate extend away from each other from their connection point in a direction away from the fixed fulcrum. The surface of the first plate facing away from the second plate defines the first guide surface, the surface of the second plate facing away from the first plate defines the second guide surface, and the surface of the third plate facing away from the fixed fulcrum defines the flow-blocking surface. Alternatively, the flipping mechanism includes a flap and a baffle. The first end of the flap is connected to the fixed fulcrum, and the baffle is connected to the second end of the flap. The two opposing surfaces of the flap define the first guide surface and the second guide surface, and the surface of the baffle facing away from the fixed fulcrum defines the flow-blocking surface.

2. The rear cover assembly according to claim 1, characterized in that, An impeller mounting area is provided between the first sidewall and the second sidewall. The rear cover assembly includes a volute tongue fixedly disposed within the rear cover housing. The volute tongue is disposed on the air outlet side of the impeller mounting area and located between the first sidewall and the second sidewall.

3. The rear cover assembly according to claim 1, characterized in that, The first guide surface and the second guide surface extend away from each other in a direction away from the fixed fulcrum, and at least a portion of the flow-blocking surface is disposed between the first guide surface and the second guide surface.

4. The rear cover assembly according to claim 1, characterized in that, When the flipping mechanism flips to the first extreme position, the first guide surface and the first sidewall define a first flow channel communicating with the first air duct; and / or, when the flipping mechanism flips to the second extreme position, the second guide surface and the second sidewall define a second flow channel communicating with the second air duct; Wherein, the effective length of the flipping mechanism is greater than the distance from the fixed fulcrum to the first side wall, or the effective length of the flipping mechanism is greater than the distance from the fixed fulcrum to the second side wall.

5. The rear cover assembly according to claim 1, characterized in that, The second sidewall partially protrudes inward to form a protrusion, and the rear cover assembly includes a partition unit disposed in the upper region of the protrusion.

6. The rear cover assembly according to claim 5, characterized in that, The partition unit includes a first partition, which contacts the stop of the flipping mechanism when the flipping mechanism flips to the first limit position.

7. The rear cover assembly according to claim 6, characterized in that, The portion of the second sidewall that is blocked by the first partition is provided with a wire passage hole, which is used for the wire harness to enter and exit the rear cover.

8. The rear cover assembly according to claim 6, characterized in that, The first end of the first partition is connected to the upper region of the protrusion, and the second end of the first partition is bent toward the upper side of the protrusion.

9. The rear cover assembly according to claim 6, characterized in that, The partition unit includes a second partition, which is disposed in the upper region of the protrusion and the angle formed by the second partition with the tangent of the part where the second sidewall is located does not exceed 90°.

10. The rear cover assembly according to claim 1, characterized in that, The end of the third plate away from the second plate extends beyond the first plate and toward the first sidewall to form a first extension segment. When the flipping mechanism is in the second extreme position, the end of the first extension segment abuts against the first sidewall.

11. The rear cover assembly according to claim 2, characterized in that, The volute tongue includes a first peripheral wall, a second peripheral wall, and a third peripheral wall connected in sequence. The first peripheral wall is located near the impeller mounting area and is formed as an arc-shaped segment that matches the outer contour of the impeller. The second peripheral wall and the third peripheral wall extend from both ends of the first peripheral wall toward a direction away from the impeller and are close to each other. The transition joint between the first peripheral wall and the second peripheral wall defines one volute tongue portion, and the transition joint between the first peripheral wall and the third peripheral wall defines the other volute tongue portion.

12. The rear cover assembly according to claim 2, characterized in that, Along the axial direction of the impeller mounting area, the volute tongue includes a first sub-segment and a second sub-segment. The first sub-segment and the rear cover are integrally formed, and the second sub-segment and the first sub-segment are spliced ​​together along the axial direction.

13. The rear cover assembly according to claim 12, characterized in that, The outer surface of the first sub-segment is provided with a first bearing seat, the outer surface of the second sub-segment is provided with a second bearing seat, and the flipping mechanism is provided with shaft portions at both ends along the axial direction, one of the shaft portions being supported on the first bearing seat and the other shaft portion being supported on the second bearing seat.

14. A clothes drying device, characterized in that, include: A clothes dryer, wherein an air inlet is provided at the rear end of the clothes dryer; Circulating air duct; impeller; And the rear cover assembly according to any one of claims 1-13, wherein the impeller is disposed inside the rear cover housing, the impeller guides the airflow flowing through the circulating air duct to the rear cover housing, and the airflow inside the rear cover housing enters the drying drum through the air inlet.

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