CN216407231U - Wind-guiding back shroud and dry clothing equipment - Google Patents

Abstract

The embodiment of the application provides an air guide rear cover and clothes drying equipment, wherein the air guide rear cover comprises a volute and a ring body, and the volute is provided with an impeller mounting area for mounting an impeller; the space inside the ring body forms an air guide ring groove, the air guide ring groove is provided with an airflow inlet, and airflow in the impeller mounting area enters the air guide ring groove through the airflow inlet; the front side of the air guide ring groove is open; the air guide ring groove is internally provided with a blocking structure which blocks air flow along the circumferential flow of the air guide ring groove. The air guide rear cover of the embodiment of the application can prevent the air flow from circularly flowing along the air guide ring groove by the separation structure, force the air flow to enter the clothes treatment cavity along the axial flow, reduce the air outlet wind resistance of the impeller, and increase the air volume of the whole machine under the condition of not additionally increasing the power of the impeller.

Description

Wind-guiding back shroud and dry clothing equipment

Technical Field

The application relates to the technical field of clothes care, in particular to an air guide rear cover and clothes drying equipment.

Background

With the improvement of living standard, clothes drying equipment is favored by more and more users as clothes drying tools.

In the related technology, the rear end of the clothes drying equipment is provided with the air guide rear cover, and hot air after condensation and dehumidification is re-introduced into the clothes drying cylinder through the air guide rear cover, so that the circular drying of the clothes drying equipment is realized, but the air volume of the whole machine is relatively small.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application is directed to a rear air guide cover and a clothes drying apparatus for increasing the air volume of the whole machine.

The embodiment of the application provides a wind-guiding back shroud for in the dryer tube with the leading-in clothing equipment that dries of air current, include:

a volute having an impeller mounting area for mounting an impeller;

the air guide ring groove is formed in the space inside the ring body and provided with an airflow inlet, and airflow in the impeller mounting area enters the air guide ring groove through the airflow inlet; the front side of the air guide ring groove is open;

the air guide ring groove is internally provided with a blocking structure which blocks air flow along the circumferential flow of the air guide ring groove.

In some embodiments, the gas flow inlet and the barrier structure are separated by a central angle of 175 ° to 185 °.

In some embodiments, the air guide ring groove has a radial inner wall surface, a radial outer wall surface, and a bottom wall surface, and the bottom wall surface is connected between the radial inner wall surface and the radial outer wall surface; the radially inner wall surface gradually contracts in a direction from back to front, and/or the radially outer wall surface gradually expands.

In some embodiments, the ring body has a radially inner wall surface, a radially outer wall surface, and a bottom wall surface that engages between the radially inner wall surface and the radially outer wall surface; the relative both sides of separation structure along circumference the diapire face is provided with the slope spigot surface, one side of slope spigot surface with the separation structure links up, along the air current direction of air current at the slope spigot surface, the slope spigot surface slopes forward gradually.

In some embodiments, the air flow inlet is located at a lower portion of the air guide ring groove, and the inclined guide surface is located at an upper portion of the air guide ring groove.

The embodiment of the application provides a dry clothing equipment, its characterized in that, dry clothing equipment includes:

the box body is provided with a plurality of air inlets,

the clothes drying barrel is arranged in the box body and comprises a barrel body and a barrel rear cover arranged at the rear end of the barrel body, and the barrel rear cover is provided with a plurality of air inlet holes;

an impeller and a circulating air duct;

and this application arbitrary embodiment the wind-guiding back shroud, a section of thick bamboo back shroud is closed the open department of wind-guiding annular, the impeller set up with rotating in the impeller installation area, the circulation wind channel will flow through the air current direction of a dry clothing section of thick bamboo the impeller installation area, the air current in the wind-guiding annular is from the open department of wind-guiding annular warp the fresh air inlet gets into in the dry clothing section of thick bamboo.

In some embodiments, the barrel rear cover includes an air inlet ring plate and a boss protruding from a rear surface of the air inlet ring plate, each of the air inlet holes is disposed on the air inlet ring plate, and the boss extends into a middle region of the ring body.

In some embodiments, the air inlet ring plate is frustum-shaped, and the air inlet ring plate gradually shrinks along the direction from the front to the back.

In some embodiments, the lid behind a section of thick bamboo is including encircleing in the direction ring muscle of air inlet crown plate edge, the tip of ring body is provided with the guide slot, the guide slot encircle in the radial outside of wind-guiding ring groove, the direction ring muscle insert in the guide slot and can rotate in the guide slot.

In some embodiments, the cabinet includes a back plate, and the wind-guiding back cover is disposed between the can back cover and the back plate.

In some embodiments, the air-guiding back cover is mounted on the back plate; the clothes drying equipment comprises a bearing and a rotating shaft, the bearing is installed on the rear back plate, one end of the rotating shaft is supported in the bearing, and the other end of the rotating shaft is connected with the clothes drying barrel.

In some embodiments, the back plate is provided with a shaft hole, the bearing is mounted on a rear side of the back plate, and the rotation shaft passes through the shaft hole.

The air guide rear cover of the embodiment of the application can prevent the air flow from circularly flowing along the air guide ring groove by the separation structure, force the air flow to enter the clothes treatment cavity along the axial flow, reduce the air outlet wind resistance of the impeller, and increase the air volume of the whole machine under the condition of not additionally increasing the power of the impeller.

Drawings

Fig. 1 is a schematic view illustrating a rear air guide cover and a clothes drying drum of a clothes drying apparatus according to an embodiment of the present application;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 3 is a cross-sectional view taken along the line A-A in FIG. 2;

FIG. 4 is a left side view of FIG. 2;

FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 4;

FIG. 6 is an enlarged partial schematic view at C of FIG. 5;

fig. 7 is a schematic structural view of an air guide rear cover according to an embodiment of the present application;

FIG. 8 is a schematic view of the structure of FIG. 7 from another perspective;

fig. 9 is a schematic view of the air guide rear cover and the rear back plate shown in fig. 7;

FIG. 10 is a schematic view of the structure of FIG. 9 from another perspective;

FIG. 11 is a schematic view of a dryer drum according to an embodiment of the present application;

FIG. 12 is a schematic view of the structure of FIG. 11 from another perspective;

description of the reference numerals

A drying cylinder 1; a laundry treatment chamber 1 a; a laundry input port 1 b; a barrel 11; a rear cover 12; air inlet holes 12 a; an air intake ring plate 121; a boss 122; a guide ring rib 123;

an air guide rear cover 2; a volute casing 21; the impeller mounting region 21 a; an air inlet 21 b; a ring body 22; the wind guide ring groove 22 a; a gas flow inlet 22 b; a radial inner wall surface 221; a radially outer wall surface 222; a bottom wall surface 223; the inclined guide surfaces 223 a; the guide grooves 22 c; a barrier structure 225;

a rear back panel 3; a shaft hole 3 a;

an impeller 4;

Detailed Description

Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following examples are intended to illustrate the present application but are not intended to limit the scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "front", "back", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Referring to fig. 1 and 2, the clothes drying apparatus includes a box, a circulating air duct, an impeller 4, a clothes drying drum 12 disposed in the box, and an air guide rear cover 2 according to any embodiment of the present application.

With continued reference to fig. 5, the space inside the drying drum 12 is a laundry treatment chamber 1a, and the front side of the drying drum 12 is opened to form a laundry input port 1 b.

Referring to fig. 11 and 12, the clothes drying drum 1 includes a drum body 11 and a drum back cover 12 disposed at a rear end of the drum body 11, and the drum back cover 12 is provided with a plurality of air inlet holes 12 a.

Referring to fig. 7 and 8, the wind guide rear cover 2 includes a volute 21 and a ring body 22. The volute casing 21 has an impeller mounting area 21a for mounting the impeller 4.

Referring to fig. 7 and 9, the space inside the ring body 22 forms an air guide ring groove 22 a.

The wind guide ring groove 22a has an air flow inlet 22b, and the air flow of the impeller mounting region 21a enters the wind guide ring groove 22a through the air flow inlet 22b, that is, the wind guide ring groove 22a is located downstream of the impeller mounting region 21a in the air flow direction.

The front side of the air guide ring groove 22a is open, that is, the side of the air guide ring groove 22a facing the tub rear cover 12 is open. The rear cover 12 closes the opening of the air guide ring groove 22a, so that the air guide ring groove 22a forms a relatively closed chamber, and the air flow of the air guide ring groove 22a can enter the clothes drying cylinder 1 from the opening of the air guide ring groove 22 a.

The impeller 4 is rotatably provided in the impeller mounting region 21 a. The circulation duct guides the air flowing through the drying cylinder 1 to the impeller mounting area 21 a. Specifically, during the rotation of the impeller 4, the airflow in the impeller mounting area 21a is pumped into the air guide ring groove 22a, and the airflow in the circulating air duct is supplemented into the impeller mounting area 21a under the negative pressure.

Referring to fig. 7 and 9, a blocking structure 225 is disposed in the air guide ring groove 22a, and the blocking structure 225 blocks the air flow from flowing along the circumferential direction of the air guide ring groove 22a, that is, the air flow cannot substantially pass through the blocking structure 225.

The blocking structure 225 is arranged offset from the airflow inlet 22b in the circumferential direction of the air guide ring groove 22 a. That is, the blocking structure 225 does not block the airflow from the impeller mounting region 21a from entering the air guide ring groove 22a from the airflow inlet 22 b.

The circulating air duct is provided with a condensing device for cooling and dehumidifying and a heating member for heating the dehumidified gas.

The clothes drying process and principle of the clothes drying equipment are as follows: the drying hot air flow enters the clothes processing cavity 1a from the opening part of the wind guide ring groove 22a through the wind inlet hole 12a, in the clothes processing cavity 1a, the drying hot air flow flows through the surface of wet clothes to perform heat and moisture exchange with the wet clothes to absorb moisture in the clothes and change the moisture into wet hot air flow, the wet hot air flow enters the circulating air channel, a condensing device in the circulating air channel condenses and dehumidifies to form low-temperature drying air flow, the low-temperature drying air flow forms drying hot air flow after being heated by a heating element, the drying hot air flow enters the wind guide rear cover 2 for guiding and then enters the clothes processing cavity 1a again, and therefore the clothes are continuously and efficiently dried in a circulating mode.

In the air guide rear cover 2 of the embodiment of the present application, the air flow inlet 22b and the blocking structure 225 approximately divide the air guide ring groove 22a into two sub-segments, and a connecting line of the air flow inlet 22b and the blocking structure 225 is taken as a reference line, the two sub-segments are located at two opposite sides of the reference line, head ends of the two sub-segments along the air flow direction are located at the air flow inlet 22b, and tail ends of the two sub-segments are located at the blocking structure 225 and at two opposite sides of the blocking structure 225. The gas flow from the gas flow inlet 22b enters one of the subsections, partly, and partly, the other subsection. In the flowing process of the sub-segment, part of the air flow enters the clothes treating cavity 1a from the open position, and a part of the air flow flows to the blocking structure 225 and is blocked by the blocking structure 225, and the part of the air flow cannot cross the blocking structure 225 and cannot enter another sub-segment, so that the air flow is forced to flow axially and enter the clothes treating cavity 1a, and therefore, the air flow cannot circulate in the air guide ring groove 22a, and backflow or confluence cannot be formed.

It should be noted that in other embodiments, the airflow from the airflow inlet 22b may substantially entirely enter one of the sub-segments, and is not distributed to another sub-segment, and in this embodiment, under the action of the blocking structure 225, the airflow does not enter another sub-segment, and thus the airflow does not flow back to the airflow inlet 22b from another sub-segment, and does not circulate in the wind guide ring groove 22 a.

It should be noted that if no blocking structure is arranged, part of the air flow entering the air guide ring groove from the air flow inlet can circularly flow in the air guide ring groove and is not easy to enter the clothes drying cylinder, on one hand, part of the hot air flow is circulated in the air guide ring groove, and energy is wasted; on the other hand, the return of the circulating air to the airflow inlet causes large air outlet resistance to the impeller, thereby aggravating the air outlet difficulty of the impeller and reducing the air volume.

The air guide rear cover 2 and the blocking structure 225 in the embodiment of the application can block air flow from circularly flowing along the air guide ring groove 22a, force the air flow to flow along the axial direction to enter the clothes processing cavity 1a, reduce the air outlet wind resistance of the impeller 4, and increase the air volume of the whole machine under the condition of not additionally increasing the power of the impeller.

Illustratively, in some embodiments, the clothes drying apparatus includes a base, an evaporator and a condenser, the cabinet cover is disposed above the base, the condensing device is an evaporator of a heat pump system, the heating element is a condenser of the heat pump system, the evaporator and the condenser are disposed on the base, both the evaporator and the condenser are disposed on the circulating air duct, and the evaporator is disposed upstream of the condenser along the air flow direction, and the air flow from the clothes treatment chamber 1a sequentially flows through the evaporator and the condenser and then enters the air guide rear cover 2.

Illustratively, the cabinet includes a left support plate, a right support plate, and a back plate 3, the back plate 3 being connected between the left support plate and the right support plate.

The clothes drying apparatus illustratively comprises a bearing mounted on the backplate 3 and a shaft having one end supported in the bearing and the other end connected to the clothes drying drum 1, specifically, to the drum back cover 12. That is, the rear end of the drying cylinder 1 is supported on the backboard 3 through a rotation shaft, and the backboard 3 bears a part of the weight of the drying cylinder 1 and its load.

In some embodiments, the bearings are mounted on the front side of the backplate 3, i.e. the bearings are located inside the housing.

In other embodiments, the bearing is installed at the rear side of the backboard 3, referring to fig. 9 and 10, the backboard 3 is provided with a shaft hole 3a, and the rotating shaft passes through the shaft hole 3 a. In this embodiment, the bearing can be assembled outside the box body, the assembly is convenient, and the bearing does not occupy a small installation space in the box body obviously, so that the bearing is prevented from interfering with the barrel rear cover 12.

Illustratively, in some embodiments, the rear side of the backplate 3 forms a recessed area, and the bearings are disposed in the recessed area, so as to facilitate positioning of the bearings, and reduce the protrusion of the bearings from the backplate 3.

In the related art, the air guide rear cover is arranged outside the box body, and directly radiates direct sound to the surrounding environment, so that the noise is high. For this reason, in some embodiments of the present application, the air guide rear cover 2 is disposed inside the box body. Specifically, the air guide rear cover 2 is provided between the duct rear cover 12 and the rear back plate 3. The sound waves radiated by the wind-guiding rear cover 2 are blocked by the back plate 3, and the noise radiated to the surrounding environment by the wind-guiding rear cover 2 can be reduced.

Since the wind guide rear cover 2 does not rotate following the drying drum 1, the wind guide rear cover 2 needs to be fixed appropriately. For example, it may be attached to the left support plate and/or the right support plate.

For example, referring to fig. 9 and 10, the wind-guiding back cover 2 is installed on the front side of the back plate 3, that is, at least a part of the weight of the wind-guiding back cover 2 and the wind load thereof can be carried by the back plate 3.

For example, to facilitate assembly of the impeller 4, referring to fig. 1, the rear side of the volute 21 is open. During assembly, the impeller 4 is installed into the impeller installation region 21a from the rear side, the opening of the volute casing 21 is covered by the backplate 3, and the backplate 3 can provide installation support for the impeller 4.

Please refer to fig. 7 and 8, an air inlet 21b is formed at the front side of the volute casing 21, and the air flow in the circulating air duct enters the impeller mounting area 21a through the air inlet 21 b.

Illustratively, the air guide ring groove 22a is located above the impeller mounting region 21a, and the air flow inlet 22b is located at a lower portion of the air guide ring groove 22a, so that the hot air flows from bottom to top.

Illustratively, gas flow inlet 22b and barrier structure 225 are separated by a central angle of 175 ° to 185 °, e.g., 175 °, 177 °, 180 °, 183 °, 185 °, etc. In this embodiment, the blocking structure 225 is far from the airflow inlet 22b, and the wind speed is relatively low, so that the influence on the wind speed is weakened, and the impact of the airflow on the blocking structure 225 is reduced.

The specific structural shape of the blocking structure 225 is not limited, and may be any structure capable of blocking the airflow. For example, plate-like, block-like, spherical, etc.

Referring to fig. 6 and 7, the air guide ring groove 22a has a radial inner wall surface 221, a radial outer wall surface 222, and a bottom wall surface 223, and the bottom wall surface 223 is connected between the radial inner wall surface 221 and the radial outer wall surface 222. The radially inner wall surface 221, the radially outer wall surface 222, and the bottom wall surface 223 substantially define the air guide groove 22 a.

Illustratively, referring to fig. 6 and 7, the radially inner wall surface 221 gradually contracts and/or the radially outer wall surface 222 gradually expands in the backward-to-forward direction. In some embodiments, only radially inner wall surface 221 tapers; in other embodiments, only the radially outer wall 222 is gradually expanded; in still other embodiments, not only radially inner wall surface 221 gradually contracts, but also radially outer wall surface 222 gradually expands.

In this embodiment, the radial inner wall surface 221 and/or the radial outer wall surface 222 are inclined substantially toward the bowl rear cover 12, which helps to divert the airflow toward the bowl rear cover 12 in the axial direction, and improves the airflow guiding effect.

For example, referring to fig. 7, the bottom wall surfaces 223 of two opposite sides of the blocking structure 225 along the circumferential direction are provided with inclined guide surfaces 223a, one side of the inclined guide surfaces 223a is engaged with the blocking structure 225, and the inclined guide surfaces 223a are gradually inclined forward along the airflow direction of the airflow at the inclined guide surfaces 223 a. In this embodiment, when the airflow flows to the inclined guide surface 223a in the circumferential direction, the inclined guide surface 223a guides the airflow to flow forward, which helps to divert the airflow to the rear cover 12 in the axial direction, and improves the airflow guiding effect.

It should be noted that the above-mentioned inclined guide surface 223a is not limited in forming manner, for example, the region of the ring body 22 at the inclined guide surface 223a may be protruded forward, and the inclined guide surface 223a may be formed on the surface of the protruded portion.

The inclined guide surface 223a is exemplarily located at an upper portion of the wind guide ring groove 22a, wherein the upper portion refers to a height position not lower than the center of the wind guide ring groove 22 a. Since the inclined guide surface 223a is distant from the air inlet 22b, the wind speed is relatively low, and the dynamic pressure conversion efficiency is higher.

In the embodiment of the present application, the wind-guiding back cover 2 may be an integrally formed structure, for example, an integral plastic piece; or be assembled by a plurality of parts.

Illustratively, referring to fig. 11 and 12, the barrel rear cover 12 includes a wind feeding ring plate 121 and a boss 122 protruding from a rear surface of the wind feeding ring plate 121. In the plane projection perpendicular to the rotation axis of the clothes drying cylinder 1, the boss 122 is approximately circular, the air inlet ring plate 121 is approximately circular, and the projection of the air inlet ring plate 121 surrounds the projection circumference of the boss 122.

The air inlet holes 12a are formed in the air inlet ring plate 121.

The shape of the air inlet hole 12a is not limited, and for example, may be circular, oval, polygonal, or the like.

The number of the air inlet holes 12a is not limited. Illustratively, all the air inlet holes 12a are arranged in an array along the circumferential direction of the air inlet ring plate 121 to improve the uniformity of the inlet air.

Referring to fig. 5 and 6, the boss 122 extends into the middle region of the ring body 22. In this embodiment, the ring 22 does not interfere with the boss 122, thereby facilitating the assembly of the boss 122 and the rotating shaft.

The air intake ring plate 121 may be a flat plate or may have another shape.

For example, referring to fig. 5, 6 and 12, the air inlet ring plate 121 is in a frustum shape, and the air inlet ring plate 121 gradually shrinks along the front-to-back direction. Therefore, the flowing direction of the air flow entering the clothes drying cylinder 1 from the air inlet hole 12a has the component velocity along the axial direction and the component velocity along the radial direction, so that the hot air flow can be more uniformly filled in the clothes treatment cavity 1a, the uniformity of the hot air flow in the clothes treatment cavity 1a is improved, the velocity along the axial direction is reduced, the heat exchange time of the hot air flow in the clothes treatment cavity 1a is prolonged, and the heat exchange efficiency of the hot air flow and clothes is improved.

In the related art, the drum back cover 12 is provided with a large number of air inlets in the central area, the hot air flows from the air inlets into the clothes processing cavity 1a in a centralized manner, and flows directly to the front side of the clothes drying drum 1 along the direction from back to front, and then enters the circulating air duct, the hot air flows only stay in the clothes drying drum 1 for a short time, and do not fully contact with the clothes, and the heat exchange efficiency is low.

It should be noted that the drying cylinder 1 needs to rotate during the operation, and the wind-guiding back cover 2 does not rotate along with the drying cylinder 1, so that the cylinder back cover 12 and the ring body 22 have relative movement, and the seal between the cylinder back cover 12 and the wind-guiding ring groove 22a is dynamic seal.

Referring to fig. 11 and 12, the rear cover 12 includes a guide ring rib 123 surrounding the edge of the air intake ring plate 121, and referring to fig. 7, a guide groove 22c is formed at an end of the ring body 22, and the guide groove 22c surrounds a radial outer side of the air guide ring groove 22 a. Referring to fig. 6, the guide ring rib 123 is inserted into the guide groove 22c and can rotate in the guide groove 22 c. On one hand, the matching of the guide ring rib 123 and the guide groove 22c provides a guide effect for the rotation of the clothes drying cylinder 1, and reduces the probability of relative sliding between the cylinder rear cover 12 and the air guide rear cover 2; on the other hand, the air-tight effect is also achieved.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of different embodiments or examples described herein may be combined by one skilled in the art without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (12)

1. An air-guiding rear cover for guiding an air flow into a drying cylinder (1) of a clothes drying apparatus, characterized by comprising:

a volute (21), the volute (21) having an impeller mounting area (21a) for mounting an impeller (4);

a ring body (22), wherein a space inside the ring body (22) forms a wind guide ring groove (22a), the wind guide ring groove (22a) is provided with an air flow inlet (22b), air flow of the impeller mounting area (21a) enters the wind guide ring groove (22a) through the air flow inlet (22b), and the front side of the wind guide ring groove (22a) is opened;

be provided with separation structure (225) in wind-guiding annular groove (22a), separation structure (225) separation air current is followed the circumference of wind-guiding annular groove (22a) flows.

2. The air guide rear cover according to claim 1, wherein the air flow inlet (22b) and the blocking structure (225) are separated by a central angle of 175-185 °.

3. The air guide rear cover according to claim 1, wherein the air guide ring groove (22a) has a radially inner wall surface (221), a radially outer wall surface (222), and a bottom wall surface (223), and the bottom wall surface (223) is engaged between the radially inner wall surface (221) and the radially outer wall surface (222); the radially inner wall surface (221) gradually contracts in a direction from the rear to the front, and/or the radially outer wall surface (222) gradually expands.

4. The air guide rear cover according to claim 1, wherein the ring body (22) has a radially inner wall surface (221), a radially outer wall surface (222), and a bottom wall surface (223), the bottom wall surface (223) being engaged between the radially inner wall surface (221) and the radially outer wall surface (222); the bottom wall surfaces (223) on two opposite sides of the blocking structure (225) along the circumferential direction are provided with inclined guide surfaces (223a), one sides of the inclined guide surfaces (223a) are connected with the blocking structure (225), and the inclined guide surfaces (223a) are gradually inclined forwards along the airflow direction of the airflow on the inclined guide surfaces (223 a).

5. The air guide rear cover according to claim 4, wherein the air flow inlet (22b) is located at a lower portion of the air guide ring groove (22a), and the inclined guide surface (223a) is located at an upper portion of the air guide ring groove (22 a).

6. A clothes drying apparatus, characterized in that the clothes drying apparatus comprises:

the box body is provided with a plurality of air inlets,

the clothes drying device comprises a clothes drying barrel (1) arranged in a box body, wherein the clothes drying barrel (1) comprises a barrel body (11) and a barrel rear cover (12) arranged at the rear end of the barrel body (11), and the barrel rear cover (12) is provided with a plurality of air inlet holes (12 a);

an impeller (4) and a circulating air duct;

the wind guide rear cover of any one of claims 1 to 5, wherein the drum rear cover (12) closes an opening of the wind guide ring groove (22a), the impeller (4) is rotatably disposed in the impeller mounting area (21a), the circulating air duct guides the air flow flowing through the dry clothes drum (1) to the impeller mounting area (21a), and the air flow in the wind guide ring groove (22a) enters the dry clothes drum (1) from the opening of the wind guide ring groove (22a) through the air inlet hole (12 a).

7. The clothes drying apparatus according to claim 6, wherein the drum back cover (12) includes a wind inlet ring plate (121) and bosses (122) protruding from a rear surface of the wind inlet ring plate (121), each of the wind inlet holes (12a) is provided on the wind inlet ring plate (121), and the bosses (122) protrude into a middle region of the ring body (22).

8. The clothes drying apparatus according to claim 7, wherein the air intake ring plate (121) has a frustum shape, and the air intake ring plate (121) is gradually contracted in a front-to-rear direction.

9. The clothes drying apparatus according to claim 7, wherein the drum back cover (12) includes a guide ring rib (123) surrounding an edge of the air intake ring plate (121), an end portion of the ring body (22) is provided with a guide groove (22c), the guide groove (22c) surrounds a radial outside of the air guide ring groove (22a), and the guide ring rib (123) is inserted into the guide groove (22c) and is rotatable in the guide groove (22 c).

10. Laundry drying apparatus according to claim 6, characterized in that the cabinet comprises a back panel (3), the wind-guiding back cover being arranged between the drum back cover (12) and the back panel (3).

11. Laundry drying apparatus according to claim 10, characterized in that said air-guiding rear cover is mounted on said rear back plate (3); the clothes drying equipment comprises a bearing and a rotating shaft, the bearing is mounted on the back plate (3), one end of the rotating shaft is supported in the bearing, and the other end of the rotating shaft is connected with the clothes drying cylinder (1).

12. Laundry drying apparatus according to claim 11, characterized in that the back plate (3) is provided with a shaft hole (3a), the bearing being mounted at the rear side of the back plate (3), the rotation shaft passing through the shaft hole (3 a).

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