CN114541112A - Air duct structure and clothes dryer - Google Patents

Abstract

The invention provides an air duct structure, comprising a volute, a fan inside the volute, and an air outlet for supplying and discharging air, and an air guide channel extending to the outside of the volute is arranged at the air outlet, and the air guide channel is formed from two ends of the volute. Airflow channel that gradually narrows towards the middle. Through the arrangement of the air guide channel, the air flow discharged from the volute can be evenly dispersed, thereby making the air flow discharged from the air duct structure more uniform. The present invention also provides a clothes dryer, which is provided with the air duct structure as described above, a drum inside the clothes dryer, and a motor that drives the drum and the fan in the air duct structure to rotate forward and reverse. The clothes dryer provided by the invention can use one motor to simultaneously drive the drum and the fan to realize forward and reverse rotation, thereby saving cost and space. The setting of the air duct structure in the dryer can make the air duct structure discharge uniform and divergent airflow in the case of forward and reverse, so as to achieve a good drying effect on objects.

Description

An air duct structure and a clothes dryer

technical field

The invention relates to the field of drying household appliances, in particular to an air duct structure and a clothes dryer.

Background technique

The most common structure in the current air duct structure is to set a volute with a built-in fan. The contour of the volute is used to guide the airflow blown by the fan, so that the airflow blown by the fan is finally sent out from the air outlet of the volute. However, the shape and structure of the current volute generally cause the final air flow to be biased to one side, that is, the air flow is more concentrated on the same side and the air flow distribution is uneven. And at present, the volute-shaped structure is also often used in the drying air duct structure to guide the wind, which causes the sent air flow to be biased to one side, which may cause uneven drying of the object, and even in extreme cases may cause the object to be dried. Partially burnt out.

An existing Chinese invention patent provides a dryer, which is provided with a fan inside, the fan includes a volute and a fan, the inner cavity of the volute is a symmetrical structure, the fan is located in the inner cavity of the volute, and the center of the fan is arranged in the inner cavity of the volute. On the axis of symmetry, a guide device is provided on the side of the fan facing the air outlet of the volute, and the guide device has a gap with the outer periphery of the fan. Through the flow guide device, the main flow of the airflow generated by the fan flows to the heating device along one side of the flow guide device and the opposite side wall of the volute. The other side wall of the volute is folded back and flows toward the fan, and is re-joined in the rotation of the fan under the guidance of the other side wall of the volute and the guide device, and there will be no accumulated backflow between the fan and the outlet of the volute. The utilization efficiency of the heating device is improved. However, in this patent, the air flow at the air outlet of the volute is obviously biased to one side, resulting in uneven air output.

To sum up, there is currently a need for an air duct structure that can evenly output warm air while utilizing the volute to guide the flow.

In view of the above problems, the present invention is proposed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an air duct structure, which can achieve the effect of uniformly conveying airflow.

The invention provides an air duct structure, comprising a volute, a fan inside the volute, and an air outlet for supplying and discharging air, and an air guide channel extending to the outside of the volute is arranged at the air outlet, and the air guide channel is formed from two ends of the volute. Airflow channel that gradually narrows towards the middle. Through the arrangement of the air guide channel, the air flow discharged from the volute can be evenly dispersed, thereby making the air flow discharged from the air duct structure more uniform. When the air duct structure is used to dry the objects, the objects to be dried are uniformly dried, so that the drying effect is better.

Further, the air guide channel extends along the axial direction of the air outlet, and the two ends of the extending direction are respectively provided with an air inlet and an air outlet, and the air inlet is connected with the air outlet; the air guide channel gradually narrows from the air inlet to the middle and forms In the first bell-mouth structure, the air guide channel gradually narrows from the air outlet to the middle to form a second bell-mouth structure, and the first bell-mouth structure and the second bell-mouth structure are connected in the middle of the air guide channel. In addition, the structure and shape of the air guide channel are set reasonably. The first bell mouth structure is convenient for guiding the airflow discharged from the volute into the air guide channel, and the second bell mouth structure is convenient for uniform and divergent discharge of the air flow in the air guide channel. , and use it to evenly dry the objects that need to be dried.

Further, the first bell-mouth structure includes a first cone segment near the air inlet, and the slope of the side wall forming the cone of the first cone segment is a constant value; the first cone segment is connected to the second cone extending in the middle of the air guide channel The slope of the side wall forming the cone of the second cone section is a constant value, and the slope is reduced relative to the first cone section; the second bell mouth structure includes a third cone section near the air outlet, and the third cone section is The slope of the side wall forming the cone is a fixed value; the third cone section is connected to the fourth cone section extending in the middle of the wind guide channel, and the slope of the side wall forming the cone of the fourth cone section is a fixed value, and the slope is relative to the third cone section. reduce; the second cone segment and the fourth cone segment are connected; preferably, arc filtering is set at the position where each cone segment with different slopes is connected in the air guide channel. The structure of each cone segment in the air guide channel is reasonably arranged, which is convenient for the guidance of air flow.

Further, the air guiding channel is surrounded by two air guiding side plates, the two air guiding side plates are respectively located on both sides of the circumference of the air outlet close to the volute, and the two air guiding side plates are arranged symmetrically along the axis of the air guiding channel; preferably Ground, the vertical top surface of the air guide side plate and the vertical top wall of the air outlet of the volute are on the same plane, and the vertical bottom end surface of the air guide side plate and the air outlet of the volute are on the same plane. The bottom wall of the vertical direction is in the same plane. The air guide channel can be surrounded by only two air guide side plates, which saves materials and simplifies the structure.

Further, part of the structure at the air inlet of the air guide channel is embedded in the air outlet of the volute; The walls are in contact with each other, and the bottom end face of the wind guide side plate in the vertical direction is in contact with the bottom wall in the vertical direction at the air outlet of the volute. The air guide side plate can form an air guide channel together with the vertical top wall and bottom wall of the volute, so that the air guide channel has a simple structure and is more conducive to collecting airflow.

As an embodiment, the present invention also proposes to provide a heating device in the air duct structure, and the air outlet of the air guide channel extends at least to a position close to the heating device; preferably, part of the structure of the heating device is embedded in the outlet of the air guide channel. inside the vent. Through the cooperative arrangement of the air guide channel and the heating device, the air guide channel can be used to uniformly discharge airflow to the heating device, so that the heating device can be heated evenly everywhere, thereby forming a uniformly arranged high-temperature drying airflow.

Further, the air outlet of the air guide channel is arranged facing the heating device, and the middle part of the heating device is at least opposite to the air outlet of the air guide channel; the horizontal two side walls perpendicular to the axial direction at the air outlet of the air guide channel are respectively directed toward the heating device. Both sides of the middle part of the heating device extend; preferably, the central axis of the air guide channel is arranged opposite to the central axis of the heating device. The structural arrangement of the air guide channel and the heating device makes it easier for the air flow discharged from the air guide channel to be evenly distributed on the heating device, thereby making the heating device evenly heated and forming a uniform high-temperature drying air flow.

Further, a straight-blade fan capable of forward and reverse rotation is arranged in the volute, and the inside of the volute is a structure without a volute tongue. Through the arrangement of the straight-blade fan and the volute structure without the volute tongue, the air duct structure can discharge the same amount of air flow when the fan is forward or reversed.

Further, the air duct structure includes a volute, a straight-blade fan embedded in the volute, and an air guide channel extending from the air outlet to the heating device is arranged at the air outlet of the volute; the volute, the straight-blade fan, the guide The air channel and the heating device are all axisymmetric structures, and the symmetrical axes of the volute, the straight-blade fan, the air guide channel and the heating device are all arranged along the same straight line. The volute, straight-blade fan, air guide channel and heating device are arranged reasonably in the air duct system, so that the airflow discharged from the volute in the air duct system is more easily guided by the air guide channel and flows to the heating device evenly. And evenly heated on the heating device, and finally output high temperature and uniform airflow.

As an embodiment, the present invention also provides a clothes dryer, which is provided with the above-mentioned air duct structure inside, a drum is also arranged inside the clothes dryer, and a fan is arranged to drive the drum and the fan in the air duct structure to rotate forward and reverse. motor. The clothes dryer provided by the invention can use one motor to drive the drum and the fan to rotate at the same time, which saves cost and space, and the motor can drive the drum and the fan to rotate forward and reverse. The setting of the air duct structure in the dryer can make the air duct structure discharge uniform and divergent airflow in the case of forward and reverse, so as to achieve a good drying effect on objects.

Adopting the above-mentioned technical scheme, the present invention has the following beneficial effects compared with the prior art:

1) In the air duct structure provided by the present invention, an air guide channel is arranged near the air outlet of the volute to guide the air flow to be evenly dispersed and discharged. The arrangement of the air guide channel makes the air flow discharged from the volute case uniform and has air flow in all directions, that is, the air flow discharged from the air duct structure is more uniform and divergent in all directions. When the air duct structure is used to dry objects, the objects to be dried are uniformly dried, local overheating is prevented, and the drying effect is ensured.

2) The air guide channel provided by the present invention has a reasonable structure, and extends from the air outlet of the volute to the outside of the volute, so that the air guide channel guides the air flow discharged from the volute to the outside of the volute. In addition, the air inlet and outlet of the air guide channel have large cross-sectional areas and narrowed middle parts, which facilitates guiding the air flow discharged from the volute into the air guide channel, and facilitates the uniform and divergent discharge of the air flow in the air guide channel.

3) The air guide channel of the present invention includes the first bell mouth type structure and the second bell mouth type structure set at the air inlet, and the first bell mouth type structure is convenient to guide the airflow discharged from the volute into the air guide channel, The two-bell mouth structure is convenient to discharge the air flow in the air guide channel evenly and divergently, and use it to evenly dry the objects that need to be dried. The slopes of the side walls forming the cone in each cone segment in the air guide channel are set to a constant value, so that the side walls of each cone segment are all along an inclined plane, which is more conducive to guiding airflow. And the change of the slope of the first cone section and the second cone section is more conducive to guiding the airflow into the wind guide channel; the slope change of the third cone section and the fourth cone section is more conducive to the uniform and divergent flow of the air flow in the wind guide channel. discharge.

4) The air guide channel of the present invention can only be provided with two air guide side plates, the structure is simple, and the effect of uniform and divergent gas discharged from the volute can be achieved. The present invention also proposes a plan to use the wind guide side plate, the top wall and bottom wall of the volute in the vertical direction to form an air guide channel, and make full use of the existing structure of the volute to save cost and space. The air guide channel is more conducive to the effect of airflow collection and guide airflow.

5) A heating device is also provided in the air duct structure provided by the present invention, and the air guide channel is arranged in coordination with the heating device, so that the airflow flowing to the heating device is evenly distributed, thereby making the heating device evenly heated. And the position of the air guide channel and the heating device is set so that the air guide channel can extend to both sides of the heating device, which is more conducive to making the air flow evenly on the heating device, thereby forming a uniform high temperature air flow.

6) The present invention also provides a clothes dryer, in which the forward and reverse rotation of the fan and the drum can be realized by a single motor. And the arrangement of the volute, the fan, the air guide channel and the heating device in the air duct structure makes the air duct structure can generate the same amount of uniform drying airflow regardless of the forward or reverse rotation of the motor, so that in the forward and reverse rotation In any case, better drying effect can be obtained.

The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

Description of drawings

The accompanying drawings, as a part of the present invention, are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

Fig. 1 is a schematic partial cross-sectional view of an air duct structure of the present invention;

Fig. 2 is the partial enlarged schematic diagram of the air guide channel of the present invention;

Fig. 3 is the schematic diagram that the air guide channel part is embedded in the air outlet in the air duct structure of the present invention;

FIG. 4 is a schematic view showing that the air guide channel part of the air channel structure of the present invention is embedded in the casing of the heating device.

Description of the symbols in the drawings: 1, volute; 2, fan; 3, air outlet; 4, air guide channel; 5, air inlet; 6, air outlet; Flare type structure; 9. The first cone section; 10, The second cone section; 11, The third cone section; 12, The fourth cone section; 16. Bottom end face; 17. Bottom wall; 18. Heating device; 19. Straight blade fan; 20. Housing of heating device.

It should be noted that these drawings and written descriptions are not intended to limit the scope of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

An air duct structure is usually provided in a household appliance with a drying function, and the object is dried by using the airflow generated by the air duct structure. In the air duct structure, a fan 2 that generates airflow is usually installed, and the fan 2 is embedded in the hollow volute 1. The hollow casing of the volute 1 forms an air duct for the fan 2 to generate airflow. The end of the air duct Set the exhaust port 3 for the supply air to be discharged. In this way, once the fan 2 is running, there will be continuous airflow discharged from the exhaust port 3, and then the airflow generated at the exhaust port 3 will be guided to the object that needs to be dried, so that the object can be dried by using the airflow. Influenced by the structure of the volute 1, the air flow at the air outlet 3 may be uneven. For example, for a traditional "P"-shaped volute, the air flow may be biased towards one side wall of the volute, so that the As a result, the objects that need to be dried are subjected to uneven drying airflow. For some air duct structures with built-in heating device 18 , parts of the objects to be dried may be continuously baked by the high-temperature drying airflow, and under extreme conditions, parts of the objects may even catch fire. In view of the above technical problems, this embodiment provides an air duct structure, which can make the air flow discharged from the volute 1 more uniformly conveyed. Specifically, as shown in FIGS. 1-4 , an air guide channel 4 is provided at the air outlet 3 of the volute 1 of the air duct structure provided in this embodiment, and the air guide channel 4 is used to make the drying airflow discharged from the air outlet 3 Evenly spread out.

As shown in FIGS. 1-4 , the air guide channel 4 extends from the position close to the air outlet 3 to the outside of the volute 1, so as to guide the drying airflow discharged from the air outlet 3 of the volute 1 to the outside of the volute 1. Outside, the drying airflow generated by the volute 1 is guided out. In order to facilitate the flow of airflow, the air guide channel 4 extends along the axial direction of the air outlet 3 . In this way, the air guiding channel 4 extends along a straight line, which is more favorable for the flow of gas than the channel extending along the bending curve. And the air guide channel 4 is arranged along the axial direction of the air outlet 3 , so that the air flow discharged from the air outlet 3 can flow into the air guide channel 4 more easily. The air inlet 5 is provided at the end of the air guide channel 4 close to the air outlet 3, and the air outlet 6 is arranged at the end opposite to the air inlet 5; Flow in the direction of the air outlet 6 . The air guide channel 4 is a structure in which the cross-sectional area of the air inlet 5 and the air outlet 6 is larger, and the cross-sectional area of the middle part between the air inlet and the air outlet is narrowed. The cross-sectional area of the air inlet 5 of the air guide channel 4 is set to be larger, so that more airflow discharged from the air outlet 3 can enter the air guide channel 4, even if the air guide channel 4 collects more air from the volute. 1 Exhaust airflow. The cross section of the middle of the air guide channel 4 is narrowed first, and the area of the cross section at the air outlet 6 is enlarged again, so that the airflow discharged from the air outlet 6 of the air guide channel 4 can be guided to diverge to the surrounding, which is convenient for drying. Uniform flow of dry air. As shown by the arrows in FIG. 3 , the air flow in the air guide channel 4 can diverge to the surrounding at the air outlet 6 .

In order to better guide the airflow, a bell-shaped structure that gradually narrows toward the middle can be provided at the air inlet 5 and the air outlet 6, and the bell-shaped structure with an inclined boundary is more conducive to guiding the airflow. Specifically, as shown in Figures 1-4, the air guide channel 4 is gradually narrowed from the air inlet 5 to the middle to form a first bell-mouth structure 7, and the air guide channel 4 is gradually narrowed from the air outlet 6 to the middle, forming a The second flared structure 8 . And the first bell-mouth structure 7 and the second bell-mouth structure 8 are connected in the middle of the air guide channel 4, and the connecting position of the middle of the first bell-mouth structure 7 and the second bell-mouth structure 8 constitutes the air guide channel 4. The central area is further narrowed relative to the air inlet 5 and the air outlet 6 of the air guide channel 4 . This arrangement makes it easier to collect more air flow discharged from the air outlet 3 at the position of the air inlet 5, while at the air outlet 6, the air flow discharged from the air guide channel 4 is more divergent and uniform.

Specifically, as shown in FIGS. 1-4 , the first bell-mouth structure 7 includes a first cone section 9 near the air inlet 5 , and the slope of the side wall of the first cone section 9 forming a cone is a constant value. The side wall of the first cone segment 9 is set to a structure with a constant slope, so that the side wall surrounding the first cone segment 9 is a sloping structure, and relative to the curved side wall with a change in curvature, the flow of the airflow is made. Smoother and more conducive to guide airflow. If the side wall surrounding the first cone segment 9 is set as a curved side wall with a changing slope, eddy currents may appear in some positions, which is not conducive to the flow of gas. The first cone section 9 is connected to the second cone section 10 extending from the middle of the wind guide channel 4 , and the slope of the side wall forming the cone of the second cone section 10 is constant. In the second cone section 10, as previously described, in order to make the airflow flow more smoothly in the second cone section 10, the slope of the sidewall of the cone forming the second cone section 10 is also set to a constant value. Since the second cone section 10 is closer to the air inlet 5 of the air guide channel 4 than the first cone section 9, and the second cone section 10 is closer to the middle of the air guide channel 4, the second cone section 9 is closer to the air inlet 5 of the air guide channel 4. The section 10 should be narrower than the first cone section 9, so the slope of the second cone section 10 is reduced relative to the slope of the first cone section 9, so that the air flow is easy to flow from the air inlet 5 of the air guide channel 4 and along the The air guide channel 4 flows.

Similarly, the second bell-mouth structure 8 arranged at the air outlet 6 of the air guide channel 4 is also divided into a third cone section 11 and a fourth cone section 12, and in order to facilitate the smooth flow of air flow, the third cone section 11 and the side walls of the fourth cone segment 12 are side walls with a constant slope. Specifically, as shown in FIGS. 1-4 , the second bell-mouth structure 8 includes a third cone section 11 near the air outlet 6 , and the slope of the side wall forming the cone of the third cone section 11 is a constant value; The section 11 is connected to the fourth cone section 12 extending from the middle of the wind guide channel 4 . The slope of the fourth cone section 12 is smaller than the slope of the third cone section 11, and the air guide channel 4 forms a structure at the air outlet 6 that gradually expands from the middle to the air outlet 6, so that the air flow in the air guide channel 4 is formed by the outlet. When the air outlet 6 is discharged, the air flow can be more divergent and uniform due to the larger cross-sectional area of the air outlet 6 . The second cone section 10 and the fourth cone section 12 are connected in the middle of the air guide channel 4 to form a complete air guide channel 4 . Preferably, as shown in FIG. 2 , arc filters are provided at the positions where the cone segments with different slopes are connected in the air guide channel 4, so as to avoid the structure of sharp angles appearing when the cone segments with different slopes are directly connected, which may cause sharp corners. The situation of breaking hands. The structure of each cone section in the air guide channel 4 provided in this embodiment is reasonable, so that the air flow can flow smoothly in each cone section; The airflow discharged from the air outlet 3 is easy to be collected into the air guide channel 4, and the air discharged from the air guide channel 4 is easier to be uniform and diffused, so that the airflow discharged from the air guide channel 4 is more conducive to uniform drying of objects.

The air guide channel 4 can be configured as a structural split splicing structure surrounded by a plurality of side walls, or an integrally formed shell structure. When the air guide channel 4 is a structure surrounded by a plurality of side walls, it can be enclosed into a structure with only the air inlet 5 and the air outlet 6, and other parts are closed. Alternatively, in order to simplify the structure of the air guide channel 4 and save materials, the air guide channel 4 is surrounded by the wind guide side plates 13 located on both sides in the horizontal direction. The wind guide side plates 13 on both sides can be respectively set to a structure similar to the "C" type. The wind guide side plates 13 on both sides are symmetrical with respect to the central axis of the wind guide channel 4, and together they enclose the area of the cross-sectional area of the two ends mentioned above. The shape of the larger and narrower air guide channel 4 in the middle.

The wind guide side plates 13 can define the circumferential boundary of the wind guide channel 4 , that is, define the left and right side boundaries of the wind guide channel 4 as shown in the figure. However, the boundary of the vertical direction perpendicular to the circumferential direction of the air guiding channel 4 is not defined, that is, the top and bottom ends of the air guiding channel 4 are not limited, that is, the direction perpendicular to the air guiding channel 4 in the figure is not limited, which may As a result, the air discharged from the volute 1 and entering the air guide passage 4 is discharged from the unrestricted vertical direction, which affects the ability of the air guide passage 4 to collect airflow. Therefore, preferably, the top end surface 14 and the bottom end surface 16 of the wind guide side plate 13 in the vertical direction are respectively in contact with the wall of the volute 1 to define the boundary of the wind guide channel 4 The airflow leaks out of the air guide channel 4 from the vertical direction. Or the air duct structure has an integral casing, the volute 1 and the air guide channel 4 are embedded in the casing of the air duct structure, and the top surface 14 and the bottom end surface 16 of the air guide side plate 13 can be respectively connected with the casing wall of the air duct structure. In the same way, the outside of the air guide channel 4 can be defined from the vertical direction by using the shell wall of the air channel structure. That is to say, the air guide side plate 13 and the wall of the volute 1 or the outer casing wall of the air duct structure can form a closed air guide channel 4 around, so that the air guide channel 4 has only the air inlet 5 and the air outlet 6 with openings, and other positions are closed. The structure can better limit the airflow in the air guide channel 4 , and can only flow in through the air inlet 5 and out through the air outlet 6 , and flow along the guidance of the air guide channel 4 .

Since the air guide passage 4 is used to guide the flow of the air discharged from the air outlet 3 of the volute 1, that is, only the air discharged from the air outlet 3 of the volute 1 is guided in the actual air guide passage 4. Therefore, the circumferential horizontal boundary of the air guide channel 4 only needs to coincide with the circumferential horizontal boundary of the air outlet 3 of the volute 1, and the vertical direction boundary of the air guide channel 4 only needs to coincide with the exhaust port of the volute 1. The vertical boundaries of the tuyere 3 may be coincident. That is, it is further preferable that the vertical top surface 14 of the wind guide side plate 13 and the vertical top wall 15 of the air outlet 3 are located on the same plane, and the vertical bottom end surface 16 of the wind guide side plate 13 is on the same plane as the vertical top wall 15 of the air outlet 3 . The bottom wall 17 in the vertical direction at the air outlet 3 is located on the same plane. The vertical direction boundary of the air guide channel 4 may coincide with the vertical direction boundary of the air outlet 3 .

As shown in the figure, in order to ensure that the air flow discharged from the air outlet 3 can flow into the air guide channel 4, the air guide channel 4 can be close to the position of the air outlet 3, and the air inlet 5 of the air guide channel 4 is away from the exhaust air. The closer the mouth 3 is, the better. As shown in this embodiment, part of the structure at the air inlet 5 of the air guide channel 4 is embedded in the air outlet 3 of the volute 1; Since the air guide channel 4 is partially embedded in the air outlet 3, that is, the air guide side plate 3 extends into the air outlet 3, the wall of the volute 1 can be used to define the vertical boundary of the air guide channel 4. Preferably, the vertical top surface 14 of the wind guide side plate 13 abuts against the vertical top wall 15 at the air outlet 3 of the volute 1, and the vertical bottom end surface 16 of the wind guide side plate 13 It abuts against the bottom wall 17 in the vertical direction at the air outlet 3 of the volute 1 . In this way, the vertical boundary of the air guide channel 4 can be jointly defined by the top wall 15 and the bottom wall 17 along the vertical direction at the air outlet 3 of the volute 1 . The air guide side plate 13 only needs to be in contact with the top wall 15 and the bottom wall 17 of the volute 1 to form an air guide channel 4 with limited boundaries around the circumference, so that the air flow in the air guide channel 4 is not easy to be scattered around. , which is convenient for the gas to flow well in the air guide channel 4 . And the top wall 15 and bottom wall 17 at the air outlet 3 of the volute 1 are used to define the vertical direction boundary of the air guide channel 4, so that only the wind guide side plates 13 on both sides are required in the air guide channel 4, which can be opposite to each other. Save material and simplify structure.

In the air duct structure provided in this embodiment, an air guide channel 4 is reasonably arranged at the air outlet 3 of the volute 1 . Through the arrangement of the air guide channel 4, the air flow discharged from the volute 1 can be discharged evenly and divergently through the air guide channel 4, so that the drying air flow can dry the object more evenly when it flows to the object.

Example 2

This embodiment provides an air duct structure on the basis of the above-mentioned embodiment. The air duct structure provided in this embodiment is the same as the air duct structure provided in Embodiment 1. Both are provided with an air guide channel 4 near the air outlet 3 of the volute 1, and the air guide channel 4 is used to guide the airflow discharged from the volute 1. flow. Compared with the air duct structure of Embodiment 1, the air duct structure of this embodiment is provided with a heating device 18, and the heating device 18 can be used to heat the airflow, so that the drying airflow can be heated up and a better drying effect can be obtained. Since the air guide channel 4 has the effect of dispersing and evenly distributing the air flow, the air outlet 5 of the air guide channel 4 can be extended at least to a position close to the heating device 18, so that the gas discharged from the air guide channel 4 can flow to the heating device evenly. The device 18 is then used to obtain a more uniformly distributed and heated drying airflow. Preferably, in order to ensure that the airflow discharged from the air guide channel 4 can be contacted and heated by the heating device 18 , as shown in the figure, part of the structure of the heating device 18 is embedded in the air outlet 6 of the air guide channel 4 . Therefore, part of the air flow discharged from the air guide channel 4 must be heated by the heating device 18 .

As shown in FIGS. 1 , 3 and 4 , the air outlet 6 of the air guide channel 4 is disposed facing the heating device 18 , and the middle part of the heating device 18 is at least opposite to the air outlet 6 of the air guide channel 4 . The air outlet 6 of the air guide channel 4 is disposed facing the heating device 18 , so that the airflow discharged from the air guide channel 4 can more easily contact the heating device 18 , thereby obtaining the heating treatment of the heating device 18 . The middle part of the heating device 18 is at least opposite to the air outlet 6 of the air guide channel 4, and the air outlet 6 of the air guide channel 4 can cover the middle part of the heating device 18; The horizontal two side walls of the air outlet 6 of the air guide channel 4, which are perpendicular to the axial direction, extend to both sides of the middle part of the heating device 18 respectively; so that the airflow discharged from the air guide channel 4 will be The flow is guided to both sides of the middle of the heating device 18, so that the airflow discharged from the air guide channel 4 contacts the heating device 18 more evenly, so that the airflow is evenly heated on the heating device 18, and a more evenly distributed high-temperature drying airflow is formed. Preferably, the central axis of the air guide channel 4 is disposed opposite to the central axis of the heating device 18 . Even if the middle part of the heating device 18 is located in the middle of the air outlet 6 of the air guide channel 4, the air guide side plates 13 on both sides just extend to both sides of the central axis of the heating device 18, so that the air guide side plates 13 The airflow guided out of the air guide flows to the heating device 18 symmetrically on the left and right, so that the airflow discharged from the air guide channel 4 is more uniformly heated, and a uniform high-temperature drying airflow is formed after being heated.

In some drying devices, it is required that the direction of the drying airflow can be changed, that is, the direction of the airflow discharged from the volute 1 can be changed. That is, as shown in the figure, in the air duct structure provided in this embodiment, a straight-blade fan 19 that can be forward and reversed is arranged in the volute 1, and the straight-blade fan 19 is used to change the direction of the drying airflow, and the straight-blade fan 19 It is possible to make the airflow flow similar to the front and rear of the reversal while the airflow direction is reversed. A volute tongue is usually arranged in the volute, and the air flow generated in the volute is easily discharged through the setting of the volute tongue, and cannot be continuously circulated in the volute 1 and cannot be discharged. However, in the air duct structure provided in this embodiment, since the airflow in the volute 1 needs to change direction, and if the structure of the volute tongue is fixed, it will not be suitable for guiding the airflow in the volute 1 to flow out when the airflow changes. Therefore, the volute 1 provided in this embodiment is a structure without a volute tongue inside. The structure of the volute 1 without the volute tongue may cause uneven distribution of the wind speed throughout the air duct section of the volute 1, which may eventually cause part of the heating device 18 to overheat due to the small air volume. burn. Therefore, in this embodiment, an air guide channel 4 is also provided at the position of the air outlet 3 of the volute 1, and through the setting of the air guide channel 4, the air flow to the heating device 18 is made more uniform and divergent, and the heating device will not be locally overheated. . The air duct structure provided in this embodiment is reasonably arranged, so that the airflow discharged from the volute 1 can flow to the heating device 18 evenly through the heating device 18, and is uniformly heated on the heating device 18 to form a uniform high-temperature drying airflow.

As shown in the figure, the air duct structure provided in this embodiment includes a volute 1 and a straight-blade fan 19 embedded in the volute 1 . 18 Extended air guide channel 4. That is, the air duct structure includes a volute 1, an air guide channel 4, and a heating device 18 that are sequentially connected from bottom to top, so that the airflow generated by the straight-blade fan 19 in the volute 1 first flows into the air guide channel 4, and is processed by the air guide channel 4. Then a uniform and divergent airflow is formed. Then, the air flow guided in the air guide channel 4 flows to the heating device 18 evenly and divergently, so that the distribution of the wind speed and air volume at various positions on the heating device 18 is uniform, and finally uniform heating is achieved. As shown in the figure, the volute 1, the straight-blade fan 19, the air guide channel 4, and the heating device 18 are all axisymmetric structures. Therefore, in order to make the air flow in the above-mentioned air duct structure flow more smoothly, the air guide channel 4 is more convenient to generate uniform and divergent airflow in the air duct structure, so the volute 1, the straight-blade fan 19, the air guide channel are required. 4. The symmetry axes of the heating device 18 are all arranged along the same straight line. That is to say, in the air duct structure provided in this embodiment, the structures at various places are reasonably arranged, which facilitates the final output of uniform drying airflow.

Example 3

This embodiment provides a clothes dryer on the basis of the above embodiments. The clothes dryer is provided with an air duct structure as described in the above embodiments, and includes a drum inside. In the drum and the air duct structure, one fan 2 is used. motor. As for the dryer, the drum needs to realize forward and reverse rotation, and the driving motor of the drum needs to drive the drum forward and reverse, so the driving motor needs to be forward and reverse, and because of saving cost and space, the motor simultaneously The fan 2 in the air duct structure is driven to move, so the fan 2 needs to be set as a fan that can be forward and reversed, and the corresponding volute 1 needs to be set to adapt to the forward and reverse rotation of the fan 2. The volute 1 structure, that is, the volute 1 As mentioned above, it can be set as a structure without a volute tongue, and because there is no volute tongue setting, it is necessary to control the flow velocity in the volute 1 to be evenly distributed, and an air guide channel needs to be set near the air outlet 3. 4. Use the air guide channel 4 to guide the air flow at the air outlet 3 to be evenly arranged, thereby avoiding local overheating to affect the drying effect.

In the clothes dryer provided in this embodiment, a motor can be used inside to simultaneously drive the drum and the fan in the air duct structure to operate, thereby saving cost and space. And when the drum needs to be forward and reverse, the fan will be forward and reverse accordingly, and the straight-blade fan provided in this embodiment can achieve the same airflow in the case of forward and reverse, avoiding the impact. drying effect. In addition, the clothes dryer provided in this embodiment is provided with the above-mentioned air duct structure, so that in the case of positive and reverse airflows generated in the volute, the airflow discharged from the volute can be uniformly heated and finally formed into a uniform air flow. The distributed high-temperature drying airflow ensures that the objects to be dried are evenly dried and prevent local overheating.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Within the scope of the technical solution of the present invention, personnel can make some changes or modifications to equivalent examples of equivalent changes by using the above-mentioned technical content, but any content that does not depart from the technical solution of the present invention is based on the technical solution of the present invention. Substantially any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the solutions of the present invention.

Claims (10)

1. An air duct structure, comprising a volute (1), a fan (2) and an air outlet (3) for supplying air to be discharged in the volute (1), wherein the air outlet (3) is provided with The air guide channel (4) extends to the outside of the volute (1), and the air guide channel (4) is an air flow channel gradually narrowed from both ends to the middle. 2. An air duct structure according to claim 1, characterized in that the air guide channel (4) extends along the axial direction of the air outlet (3), and the two ends of the extending direction are respectively provided with air inlets (5), The air outlet (6) and the air inlet (5) are connected with the air outlet (3); the air guide channel (4) is gradually narrowed from the air inlet (5) to the middle to form a first bell-mouth structure (7), The air guide channel (4) is gradually narrowed from the air outlet (6) to the middle to form a second bell-mouth structure (8), and the first bell-mouth structure (7) and the second bell-mouth structure (8) are located in the middle. The middle parts of the air guide channels (4) are connected. 3. An air duct structure according to claim 2, characterized in that the first bell-mouth structure (7) comprises a first cone section (9) near the air inlet (5), and the first cone section ( 9) The slope of the side wall constituting the cone is a fixed value; The first cone section (9) is connected to the second cone section (10) extending from the middle of the wind guide channel (4). paragraph (9) decreases; The second bell-mouth structure (8) includes a third cone section (11) near the air outlet (6), and the slope of the side wall of the third cone section (11) forming a cone is a constant value; The third cone section (11) is connected to the fourth cone section (12) extending from the middle of the wind guide channel (4). segment (11) decreases; The second cone section (10) and the fourth cone section (12) are connected; Preferably, arc filters are provided at the positions where the cone segments with different slopes are connected in the air guide channel (4). 4. An air duct structure according to claim 3, characterized in that the air guide channel (4) is surrounded by two air guide side plates (13), and the two air guide side plates (13) are respectively located close to the volute On both sides of the air outlet (3) in the circumferential direction of (1), the two air guide side plates (13) are symmetrically arranged along the axis of the air guide channel (4); Preferably, the vertical top surface (14) of the wind guide side plate (13) and the vertical top wall (15) at the air outlet (3) of the volute (1) are located on the same plane, and the wind guide The bottom end surface (16) of the side plate (13) in the vertical direction and the bottom wall (17) in the vertical direction at the air outlet (3) of the volute (1) are located on the same plane. 5. An air duct structure according to claim 4, wherein part of the structure at the air inlet (5) of the air guide channel (4) is embedded in the air outlet (3) of the volute (1); Preferably, the vertical top surface (14) of the wind guide side plate (13) is in abutment with the vertical top wall (15) at the air outlet (3) of the volute (1). The bottom end surface (16) of the plate (13) in the vertical direction is in abutment with the bottom wall (17) in the vertical direction at the air outlet (3) of the volute (1). 6. An air duct structure according to any one of claims 2-5, characterized in that, a heating device (18) is provided in the air duct structure, and the air outlet (5) of the air guide channel (4) extends at least to a position close to the heating device (18); Preferably, part of the structure of the heating device (18) is embedded in the air outlet (6) of the air guide channel (4). 7 . An air duct structure according to claim 6 , wherein the air outlet ( 6 ) of the air guide channel ( 4 ) is disposed facing the heating device ( 18 ), and the middle part of the heating device ( 18 ) at least Opposite to the air outlet (6) of the air guide channel (4); Two horizontal side walls perpendicular to the axial direction at the air outlet (6) of the air guide channel (4) extend to both sides of the middle part of the heating device (18) respectively; Preferably, the central axis of the air guide channel (4) is arranged opposite to the central axis of the heating device (18). 8. An air duct structure according to claim 7, characterized in that a straight-blade fan (19) that can be forward and reversed is arranged in the volute (1), and a volute tongue is not arranged inside the volute (1). Structure. 9. An air duct structure according to claim 8, characterized in that the air duct structure comprises a volute (1), a straight-blade fan (19) embedded in the volute (1), and the volute (1) ) is provided with an air guide channel (4) extending from the air outlet (3) to the heating device (18) at the air outlet (3); The volute (1), the straight-blade fan (19), the air guide channel (4), and the heating device (18) are all axisymmetric structures, and the volute (1), the straight-blade fan (19), the air guide channel (4) and the symmetrical axes of the heating device (18) are all arranged along the same straight line. 10. A clothes dryer, characterized in that the air duct structure according to any one of claims 1-9 is arranged inside, a drum is also arranged inside the clothes dryer, and a fan (2) is arranged to drive the drum and the air duct structure. ) forward and reverse motors.

Images