CN216338604U

CN216338604U - Drying tunnel device and clothes treatment equipment with same

Info

Publication number: CN216338604U
Application number: CN202122783605.0U
Authority: CN
Inventors: 陈绍彬; 钱伟; 张伟
Original assignee: Wuxi Little Swan Electric Co Ltd
Current assignee: Wuxi Little Swan Electric Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-04-19
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a drying tunnel device and clothes treatment equipment with the same. The drying tunnel device comprises: the drying tunnel comprises a drying tunnel shell, a flange mounting part and a drying tunnel body, wherein a drying channel is defined in the drying tunnel body; the heat conductivity coefficient of the fan flange is smaller than that of the drying channel shell, the fan flange is installed on the flange installation portion, the fan flange and the flange installation portion limit a wind cavity, the wind cavity is communicated with the drying channel, a volute tongue is arranged on one side, facing the drying channel shell, of the fan flange, and the volute tongue is arranged at the junction of the wind cavity and the drying channel. According to the drying tunnel device provided by the embodiment of the utility model, the volute tongue can adjust the air quantity and the air speed flowing to the drying channel, and the heat conductivity coefficient of the fan flange is smaller than that of the drying tunnel shell, so that the heat conduction from the fan flange to the volute tongue is reduced, the heat deformation of the volute tongue is favorably reduced, and the position precision and the air guide effect of the volute tongue are favorably ensured.

Description

Drying tunnel device and clothes treatment equipment with same

Technical Field

The utility model relates to the technical field of clothes treatment, in particular to a drying tunnel device and clothes treatment equipment with the same.

Background

In the related art, the volute tongue in the drying tunnel device is usually fixed on the drying tunnel shell made of metal material, and the drying tunnel shell and the volute tongue are easy to deform when being heated, so that the position of the volute tongue changes, and the air guide effect of the volute tongue is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the utility model provides the drying tunnel device which can ensure the position precision and the air guide effect of the volute tongue.

The utility model also provides clothes treatment equipment with the drying tunnel device.

The drying tunnel device according to the embodiment of the utility model comprises: drying tunnel casing and fan flange, inject wind chamber and the stoving passageway of mutual intercommunication in the drying tunnel device, the fan flange is equipped with the spiral shell tongue in one side towards the drying tunnel casing to adjust the amount of wind and the wind speed that realize to flow to the stoving passageway, the coefficient of heat conductivity of fan flange is less than the coefficient of heat conductivity of drying tunnel casing, in order to reduce the heat-conduction of fan flange to the spiral shell tongue, thereby be favorable to reducing the deformation of being heated of spiral shell tongue, and then be favorable to guaranteeing position accuracy and the wind-guiding effect of spiral shell tongue.

According to some embodiments of the utility model, the fan flange is a plastic part, and the volute tongue is integrally injection-molded with the fan flange.

According to some embodiments of the utility model, the fan flange has a fan mounting hole; the volute tongue is provided with a first tongue surface, a second tongue surface, a connecting surface and an end surface, the connecting surface is connected with the first tongue surface and the second tongue surface, the end surface is connected with the first tongue surface, the connecting surface and the second tongue surface, the first tongue surface faces to the axis of the fan mounting hole, and the second tongue surface faces to the side wall of the air cavity and extends towards the drying channel.

Furthermore, the junction of any two of the first tongue surface, the second tongue surface, the connecting surface and the end surface is transited through an arc surface.

Further, the angle between the first tongue surface and the second tongue surface is 40-70 degrees.

According to some embodiments of the utility model, the worm tongue is separate from the drying tunnel housing.

Further, the fan flange is provided with a fan mounting hole; the wind cavity is provided with a non-full-circle side wall and is provided with a first end and a second end, the distance between the first end and the fan mounting hole is smaller than the distance between the second end and the fan mounting hole, the volute tongue is located between the first end and the second end, and the gap between the volute tongue and the first end is smaller than the gap between the volute tongue and the second end.

According to some embodiments of the utility model, the clearance between the free end of the volute tongue and the drying tunnel shell is 3mm-8 mm.

According to some embodiments of the present invention, the drying tunnel device further includes a fan, the fan is disposed in the air cavity, and a distance t between the volute tongue and the fan in a radial direction of the fan satisfies the following relation: t/D is more than or equal to 0.07 and less than or equal to 0.10, wherein D is the outer diameter of the fan.

According to some embodiments of the utility model, the cross-section of the volute tongue decreases in a direction extending along the volute tongue towards the free end.

According to another aspect of the utility model, the clothes treatment equipment comprises the drying tunnel device.

According to the clothes treatment equipment of the embodiment of the utility model, the drying tunnel device comprises: drying tunnel casing and fan flange, inject the wind chamber and the stoving passageway of mutual intercommunication in the drying tunnel device, the fan flange is equipped with the snail tongue in one side towards the drying tunnel casing, the snail tongue can set up the position of wind chamber to the stoving passageway air-out to adjust the amount of wind and the wind speed to realizing to the stoving passageway, and then the air output that makes the air outlet of stoving passageway is even, avoid the too high problem of air outlet department local zone temperature, thereby be favorable to promoting holistic stoving effect.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a top view of a drying tunnel device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1 at A-A;

FIG. 3 is an enlarged view at I of FIG. 2;

figure 4 is a front view of a drying tunnel device according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of FIG. 3 at B-B;

figure 6 is a schematic structural view of a drying tunnel arrangement according to an embodiment of the present invention;

FIG. 7 is a schematic view of a fan flange according to an embodiment of the present invention;

FIG. 8 is another schematic view of a fan flange according to an embodiment of the present invention;

FIG. 9 is another schematic view of a fan flange according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view of a fan flange according to an embodiment of the present invention.

Reference numerals:

the drying tunnel comprises a fan flange 1, a fan mounting hole 11, a drying tunnel shell 2, a drying tunnel body 21, a drying tunnel bottom plate 211, a drying tunnel cover plate 212, a flange mounting part 22, a fan 3, a volute tongue 4, a first tongue surface 41, a second tongue surface 42, a connecting surface 43, a first connecting surface 431, a second connecting surface 432, an end surface 44, a drying tunnel heating pipe 5, a drying channel 6, an air cavity 7 and a drying tunnel device 10.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and should not be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise specifically stated or limited, the terms "fixed," "mounted," "connected," and the like are to be construed broadly and may, for example, be removably connected or fixedly connected; can be mechanically connected, electrically connected or can communicate with each other; may be indirectly connected through an intermediate medium or may be directly connected. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

A drying tunnel arrangement 10 according to an embodiment of the present invention is described in detail below with reference to fig. 1-10.

Referring to fig. 1-6, a drying tunnel device 10 includes: drying tunnel casing 2 and fan flange 1, drying tunnel casing 2 are provided with drying tunnel body 21 and flange installation department 22, and drying tunnel body 21 and flange installation department 22 can be fixed connection, can inject the stoving passageway 6 that can supply the circulation of air in the drying tunnel body 21, can be provided with drying tunnel heating pipe 5 in the stoving passageway 6 to be used for the air that the heating flow flows through stoving passageway 6.

In some embodiments of the present invention, referring to fig. 2 and 4, the drying tunnel body 21 includes a drying tunnel bottom plate 211 and a drying tunnel cover plate 212, the drying tunnel bottom plate 211 may be used to fix the heating pipes, the drying tunnel cover plate 212 may be covered on the drying tunnel bottom plate 211 to form the drying tunnel 6, and the drying tunnel bottom plate 211 may be integrally formed with the flange mounting portion 22.

Referring to fig. 1-6, a fan flange 1 may be installed on a flange installation portion 22, an air cavity 7 may be defined after the flange installation portion 22 and the fan flange 1 are assembled, the air cavity 7 is communicated with a drying channel 6, and an air flow in the air cavity 7 may flow to the drying channel 6, wherein the fan flange 1 may be covered on the flange installation portion 22, and the fan flange 1 may be connected to a drying channel body 21 in an overlapping manner, a sealing strip may be disposed at a joint of the fan flange 1 and the flange installation portion 22 to improve a sealing effect of the air cavity 7 at the joint, and a sealing strip may also be disposed at the joint of the fan flange 1 and the drying channel body 21 to facilitate the improvement of the sealing effect of the drying channel 6 and the air cavity 7 at the joint.

In some embodiments of the present invention, the fan 3 may be mounted on the fan flange 1, and at least a portion of the fan 3 is located in the air cavity 7, the flange mounting portion 22 may be provided with an air inlet, the fan 3 may suck air outside the drying tunnel device 10 into the air cavity 7 through the air inlet, and then the air may flow toward the drying channel 6 by guiding action of an inner wall of the air cavity 7, the drying channel 6 is provided with an air outlet, and the air outlet may be open to a position where an article to be dried is located, so as to dry the article to be dried.

Referring to fig. 1-10, the flange mounting portion 22 when assembled with the fan flange 1 may form a volute, so as to guide the airflow in the air cavity 7 to the drying channel 6, a volute tongue 4 is arranged on one side of the fan flange 1 facing the drying channel shell 2, the volute tongue 4 and the fan flange 1 are integrally formed, or the volute tongue 4 is arranged on the fan flange 1, the volute tongue 4 is arranged at the junction of the drying channel 6 and the air cavity 7, it can be understood that the fan flange 1 is the top surface of the wind chamber 7 on the side facing the drying tunnel shell 2, the volute tongue 4 extends downwards from the top surface of the wind chamber 7, and the volute tongue 4 can be arranged at the position where the air cavity 7 discharges air to the drying channel 6 so as to adjust the air quantity and the air speed flowing to the drying channel 6, and then the air output of the air outlet of the drying channel 6 is uniform, and the problem of overhigh temperature of the local area at the air outlet is avoided, so that the whole drying effect is favorably improved.

It should be noted that, because the drying tunnel heating pipe 5 with a higher temperature is arranged in the drying tunnel 6, the temperature of the drying tunnel body 21 is higher, and in order to avoid heat conduction to the volute tongue 4, the fan flange 1 and the drying tunnel shell 2 can adopt different materials and manufacturing processes, so that the heat conductivity coefficient of the fan flange 1 is smaller than that of the drying tunnel shell 2, thereby being beneficial to reducing the heat conduction from the fan flange 1 to the volute tongue 4, reducing the heated deformation of the fan flange 1 and the volute tongue 4, and further being beneficial to ensuring the position precision of the volute tongue 4 and the wind guiding effect of the volute tongue 4. In addition, the fan flange 1 with a lower thermal conductivity can also reduce its heat conduction to the fan 3, so as to ensure that the fan 3 operates reliably.

In some embodiments of the present invention, the drying tunnel housing 2 may be a sheet metal part formed by stamping, the sheet metal part has a thinner wall thickness, which is beneficial to saving materials and reducing weight, and meanwhile, the sheet metal part has excellent heat resistance to ensure that the drying tunnel 6 can bear higher temperature. Fan flange 1 can be the working of plastics through injection moulding, and the coefficient of heat conductivity of working of plastics is less, and the heat-proof quality is better, and the working of plastics still has good waterproof, dampproofing, shock resistance simultaneously to satisfy fan 3's operational environment, guarantee that fan 3 moves reliably.

The drying tunnel device 10 according to the embodiment of the present invention includes: drying tunnel casing 2 and fan flange 1, inject wind chamber 7 and the stoving passageway 6 of intercommunication each other in the drying tunnel device 10, fan flange 1 is equipped with snail tongue 4 in the one side towards drying tunnel casing 2, adjust the amount of wind and the wind speed to realizing to stoving passageway 6, the coefficient of heat conductivity of fan flange 1 is less than the coefficient of heat conductivity of drying tunnel casing 2, in order to reduce fan flange 1 to the heat-conduction of snail tongue 4, thereby be favorable to reducing the deformation of being heated of snail tongue 4, and then be favorable to guaranteeing the position precision and the wind-guiding effect of snail tongue 4.

In some embodiments of the present invention, the fan flange 1 may be a plastic member with better heat insulation performance to reduce the heat transferred to the volute tongue 4, the volute tongue 4 may also be a plastic member, the fan flange 1 and the volute tongue 4 may be integrally injection molded, the injection molded plastic member is easy to process, and the size of the molded volute tongue 4 can be ensured to meet the design requirement.

It can be understood that, in order to ensure the adjusting effect of the volute tongue 4 on the air volume and the air speed flowing to the drying channel 6, when the volute tongue 4 is structurally designed, the included angle between each profile on the volute tongue 4 is variable, and if the volute tongue 4 adopts a sheet metal part, some profiles with smaller included angles on the volute tongue 4 are easy to fracture at the junction, so that the yield of the volute tongue 4 is low, and the reliability is poor, therefore, in some embodiments of the utility model, the fan flange 1 and the volute tongue 4 are both plastic parts which are easy to process, thereby being beneficial to improving the yield of the manufactured volute tongue 4.

In addition, it should be noted that the position precision between the volute tongue 4 and the fan 3 also has a large influence on the air volume and the air pressure in the drying channel 6, and the fan 3 is mounted on the fan flange 1, and the volute tongue 4 and the fan 3 are integrally formed, so that the position error between the fan flange 1 and the volute tongue 4 is favorably reduced, and the adjustment effect of the volute tongue 4 on the air volume and the air pressure flowing to the drying channel 6 is further ensured.

In some embodiments of the present invention, referring to fig. 1, 3, 7-10, the fan flange 1 is provided with a fan mounting hole 11, the fan 3 is rotatable around an axis of the fan mounting hole 11, and the fan mounting hole 11 can be used for fixing the fan 3. The volute tongue 4 is provided with a connecting surface 43, a second tongue surface 42, a first tongue surface 41 and an end surface 44, wherein the connecting surface 43 connects the second tongue surface 42 and the first tongue surface 41, the end surface 44 connects the second tongue surface 42, the first tongue surface 41 and the connecting surface 43, the first tongue surface 41 faces the axis of the fan mounting hole 11, in other words, the first tongue surface 41 faces the rotation axis of the fan 4, the first tongue surface 41 and the side wall of the air cavity 7 can guide the airflow in the air cavity 7 to the drying channel 6, the second tongue surface 42 faces the side wall of the air cavity 7, the second tongue surface 42 extends towards the drying channel 6, and the second tongue surface 42 can guide the airflow in the air cavity 7 to the drying channel 6.

It can be understood that the connecting surface 43, the second tongue surface 42 and the first tongue surface 41 are sequentially connected end to end, the upper ends of the connecting surface 43, the second tongue surface 42 and the first tongue surface 41 are connected with the fan flange 1, the lower ends of the connecting surface 43, the second tongue surface 42 and the first tongue surface 41 are connected through the end surface 44, and the volute tongue 4 can be of a polygon prism-like structure.

In some embodiments of the present invention, the junction of any two of the connecting surface 43, the second tongue surface 42, and the first tongue surface 41 and the end surface 44 is transited by a circular arc surface to reduce wind resistance, avoid loss of gas energy, and reduce noise generated by the volute tongue 4.

In some embodiments of the present invention, an included angle between the second tongue surface 42 and the first tongue surface 41 is 40 ° to 70 °, when the included angle between the second tongue surface 42 and the first tongue surface 41 is less than 40 °, noise generated by the volute tongue 4 is large, which affects user experience, and when the included angle between the second tongue surface 42 and the first tongue surface 41 is greater than 70 °, wind resistance of the volute tongue 4 is large, which results in a decrease in air volume. Optionally, the included angle between the second tongue surface 42 and the first tongue surface 41 is 51 ° or 66 °.

In some embodiments of the present invention, the volute tongue 4 is separated from the drying tunnel casing 2 to prevent the drying tunnel casing 2 from colliding with the volute tongue 4 to generate abnormal noise when the temperature is changed.

In some embodiments of the present invention, the volute tongue 4 is disposed on the fan flange 1, the fan flange 1 and the volute tongue 4 may be integrally formed plastic pieces, the material and the thermal conductivity coefficient of the volute tongue 4 and the flange mounting portion 22 are different, and the temperature of the volute tongue 4 and the flange mounting portion 22 during operation is different, so as to avoid the abnormal noise problem caused by thermal expansion and cold contraction, the volute tongue 4 may be separated from other cavity walls of the wind cavity 7, that is, the volute tongue 4 is not in contact with the cavity walls such as the bottom wall and the side wall of the wind cavity 7 except for being connected with the fan flange 1 on the top wall of the wind cavity 7, so as to avoid the abnormal noise generated by the flange mounting portion 22 colliding with the volute tongue 4 during the cold and hot alternation.

In some embodiments of the present invention, the fan flange 1 has a fan mounting hole 11, the fan cavity 7 has a non-full-circle side wall, it is understood that the side wall is a wall surface connecting between an upper wall surface and a lower wall surface (i.e. a top wall and a bottom wall) in the fan cavity 7, the side wall has an arc-shaped section and a flat section, the side wall can be oriented like a "J" to guide air to the drying channel 6, the side wall has a first end and a second end, the first end is an end of the arc-shaped section away from the flat section, the second end is an end of the flat section away from the arc-shaped section, the distance between the first end and the fan mounting hole 11 is smaller than the distance between the second end and the fan tongue 4 is located between the first end and the second end, and the gap between the fan tongue 4 and the first end is smaller than the gap between the fan tongue 4 and the second end, that is, the fan tongue 4 is close to the first end of the side wall closer to the fan mounting hole 11, so as to realize that the fan tongue 4 adjusts the air volume and the air speed flowing to the drying channel 6, the air outlet quantity of the air outlet of the drying channel 6 is uniform.

In some embodiments of the present invention, referring to fig. 7 and 8, the connection surface 43 includes a first connection surface 431 and a second connection surface 432, the first connection surface 431 faces the first end of the side wall, and the first connection surface 431 and the first end of the side wall have a gap of 3mm to 8mm, so as to avoid the flange mounting portion 22 from colliding with the volute tongue 4 during alternating cold and hot states to generate abnormal sound and ensure the wind guiding effect of the volute tongue 4, and optionally, the gap between the first connection surface 431 and the first end of the side wall is 5mm or 7 mm. Second is connected face 432 and is towards stoving passageway 6, and second is connected face 432 can block the wind direction of stoving passageway 6 and is flowed back by wind chamber 7 to avoid wind at wind chamber 7 inner loop to flow, thereby be favorable to promoting the efficiency of fan 3.

In some embodiments of the present invention, referring to fig. 3, a gap a between the drying tunnel casing 2 and the free end of the volute tongue 4 is 3mm-8mm, wherein the free end of the volute tongue 4 may be an end surface 44 of the volute tongue 4, and if the gap between the drying tunnel casing 2 and the free end of the volute tongue 4 is less than 3mm, the volute tongue 4 is easily contacted with the flange installation part 22 at the bottom of the wind cavity 7 under processing errors and assembly errors of parts, and the flange installation part 22 is easily collided with the volute tongue 4 during cold and hot alternation to generate abnormal sound. If the clearance between the drying tunnel shell 2 and the free end of the volute tongue 4 is larger than 8mm, the air guide effect of the volute tongue 4 is affected. Optionally, the gap between the drying tunnel shell 2 and the free end of the volute tongue 4 is 5mm or 7 mm.

In some embodiments of the utility model, and as shown with reference to FIG. 3, the height h of the volute tongue 4 is 50mm-65 mm. Optionally, the height of the volute tongue 4 is 56.8 mm.

In some embodiments of the present invention, referring to fig. 2 and 3, the drying tunnel device 10 further includes a fan 3, the fan 3 is disposed in the air cavity 7, an outer diameter of the fan 3 is D, and a distance t between the volute tongue 4 and the fan 3 in a radial direction of the fan 3 satisfies a following relation that t/D is 0.07 ≤ t/D ≤ 0.10, so as to ensure a flow structure and performance inside the air cavity 7, and also reduce noise generated by operation of the fan 3, optionally, a ratio of t to D is 0.08 or 0.09.

In some preferred embodiments of the present invention, the distance t between the volute tongue 4 and the fan 3 is 11.7mm, and the outer diameter of the fan 3 is 131mm, so that the drying tunnel device 10 has the advantages of high full pressure, high efficiency, low noise, etc.

In some embodiments of the present invention, the fan 3 is a centrifugal fan, and the distance between the volute tongue 4 and the fan 3 is the gap between the volute tongue 4 and the outer diameter of the impeller of the fan 3.

In some embodiments of the present invention, the cross section of the volute tongue 4 gradually decreases in a direction extending from the volute tongue 4 to the free end, wherein the free end of the volute tongue 4 is the end surface 44 of the volute tongue 4 facing the bottom surface of the wind cavity 7, and the cross section area of the volute tongue 4 gradually decreases in the direction towards the free end, which can facilitate the demolding of the fan flange 1 and the volute tongue 4 after injection molding.

In some embodiments of the present invention, referring to fig. 3 and 10, an included angle between the first tongue surface 41 and the top surface of the wind cavity 7 is 90 °, an included angle α between the second tongue surface 42 and the top surface of the wind cavity 7 is 101.4 °, an included angle β between the connecting surface 43 and the top surface of the wind cavity 7 is 96.1 °, a radius of a transition arc between the first tongue surface 41 and the end surface 44 is 3mm, a radius of a transition arc between the second tongue surface 42 and the end surface 44 is 6.8mm, a radius of a transition arc between the end surface 44 of the connecting surface 43 is 3mm, the volute tongue 4 is of a hollow structure, and wall thicknesses d of the connecting surface 43, the second tongue surface 42, the first tongue surface 41 and the end surface 44 are all 2 mm.

According to a clothes treating apparatus of another embodiment of the present invention, as shown in fig. 1-10, the clothes treating apparatus includes a drying tunnel device 10 of the above embodiment, wherein the clothes treating apparatus may be a clothes dryer, a washing and drying integrated machine, etc., the clothes treating apparatus may be provided with a tub, and an air outlet of a drying passage 6 may be connected to the tub of the clothes treating apparatus to pass hot air in the drying passage 6 to the tub, thereby drying clothes in the tub.

The drying tunnel device 10 of the laundry treating apparatus according to the embodiment of the present invention includes: drying tunnel casing 2 and fan flange 1, inject wind chamber 7 and the stoving passageway 6 of intercommunication each other in the drying tunnel device 10, fan flange 1 is equipped with snail tongue 4 in the one side towards drying tunnel casing 2 to adjust the amount of wind and the wind speed of realizing to stoving passageway 6, the coefficient of heat conductivity of fan flange 1 is less than the coefficient of heat conductivity of drying tunnel casing 2, reduce the deformation of fan flange 1 when being heated, thereby be favorable to guaranteeing the position accuracy and the wind-guiding effect of snail tongue 4.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean 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 utility model. In this specification, 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. In addition, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A drying tunnel apparatus, comprising:

the drying tunnel comprises a drying tunnel shell, a flange mounting part and a drying tunnel body, wherein a drying channel is defined in the drying tunnel body;

the fan flange, the coefficient of heat conductivity of fan flange is less than the coefficient of heat conductivity of drying tunnel casing, the fan flange install in flange installation department, the fan flange with flange installation department prescribes a limit to wind chamber, just wind chamber with stoving passageway intercommunication, the orientation of fan flange one side of drying tunnel casing is equipped with the snail tongue, the snail tongue is located the wind chamber with the juncture of stoving passageway.

2. The drying tunnel device according to claim 1, wherein the fan flange is a plastic part, and the worm tongue is integrally injection molded with the fan flange.

3. The drying tunnel device of claim 1, wherein the fan flange has a fan mounting hole; the volute tongue is provided with a first tongue surface, a second tongue surface, a connecting surface and an end surface, the connecting surface is connected with the first tongue surface and the second tongue surface, the end surface is connected with the first tongue surface, the connecting surface and the second tongue surface, the first tongue surface faces to the axis of the fan mounting hole, and the second tongue surface faces to the side wall of the air cavity and extends towards the drying channel.

4. The drying tunnel device according to claim 3, wherein the junction between any two of the first tongue surface, the second tongue surface, the connecting surface and the end surface is transited by a circular arc surface.

5. The drying tunnel device according to claim 3, wherein the angle between the first and second tongue surfaces is 40 ° -70 °.

6. The drying tunnel device of claim 1, wherein the volute tongue is separate from the tunnel housing.

7. The drying tunnel device of claim 6, wherein the fan flange has a fan mounting hole; the wind cavity is provided with a non-full-circle side wall and is provided with a first end and a second end, the distance between the first end and the fan mounting hole is smaller than the distance between the second end and the fan mounting hole, the volute tongue is located between the first end and the second end, and the gap between the volute tongue and the first end is smaller than the gap between the volute tongue and the second end.

8. The drying tunnel device according to claim 1, wherein the clearance between the free end of the volute tongue and the drying tunnel shell is 3mm-8 mm.

9. The drying tunnel device according to claim 1, further comprising a fan, wherein the fan is disposed in the air cavity, and a distance t between the volute tongue and the fan in a radial direction of the fan satisfies the following relation: t/D is more than or equal to 0.07 and less than or equal to 0.10, wherein D is the outer diameter of the fan.

10. The drying tunnel device according to claim 1, wherein the cross-section of the volute tongue is gradually reduced in a direction extending along the volute tongue towards the free end.

11. A laundry treatment apparatus, characterized by comprising a drying tunnel device according to any one of claims 1-10.