Drying tunnel assembly and clothes dryer

Abstract

The utility model provides a drying tunnel assembly and a clothes dryer, the clothes dryer comprises a clothes drying barrel, the clothes drying barrel comprises an air inlet and an air outlet, the drying tunnel assembly comprises a drying air duct and an air door assembly, the drying air duct comprises at least two separated sub-air ducts, and the two ends of each sub-air duct are used for communicating with the air inlet and the air outlet respectively; and the air door assembly is arranged in the drying air duct and used for movably enabling at least one sub air duct to be in a closed first state or enabling each sub air duct to be in a communicated second state. According to the drying channel assembly, the communicating state of the multiple sub-air channels is changed through the air door assembly, the air speed in the drying air channel can be adjusted, when the clothes dryer needs to be dried in an accelerated mode, the speed of air circulation between the clothes drying barrel and the drying assembly can be increased by reducing the number of the communicated sub-air channels, and therefore the drying speed is increased.

Description

Technical Field

[0001] This application belongs to the technical field of clothing processing equipment, and particularly relates to a drying tunnel assembly and a clothes dryer. Background Technology

[0002] The widespread use of clothes dryers has brought great convenience to people's lives. A heat pump clothes dryer includes a drying drum, a drying duct, a heat pump drying system and a fan installed in the drying duct. During operation, the fan drives air circulation between the drying drum and the drying duct, and hot air removes moisture from the clothes, thus drying them. In existing technology, increasing the airflow speed in the drying duct can only be achieved by increasing the fan speed; however, this method has a limited range of adjustable airflow speed and consumes a significant amount of power. Utility Model Content

[0003] This application provides a refrigerator drying duct assembly and a clothes dryer, which can solve the technical problem of making the air speed in the drying duct of the clothes dryer adjustable.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A drying tunnel assembly is used in a clothes dryer, the clothes dryer including a drying drum, the drying drum including an air inlet and an air outlet, the drying tunnel assembly including:

[0006] The drying air duct includes at least two mutually spaced sub-ducts, each of which is connected at both ends to the air inlet and the air outlet, respectively.

[0007] An air damper assembly, disposed in the drying air duct, is used to movably bring at least one of the sub-ducts into a closed first state, or to bring each of the sub-ducts into a connected second state.

[0008] In some embodiments, the drying air duct includes a first sub-air duct and a second sub-air duct; the drying air duct includes:

[0009] The air duct housing forms an air cavity with an air inlet and an air outlet, the air outlet being adapted to connect with the air inlet and the air inlet being adapted to connect with the air outlet;

[0010] A partition is disposed in the air cavity and is adapted to separate the air cavity to form adjacent first sub-air ducts and second sub-air ducts.

[0011] In some embodiments, the damper assembly includes a first damper, which is rotatably mounted in the air cavity;

[0012] When the first damper is rotated to the first position, both the first sub-duct and the second sub-duct are in a connected second state. When the first damper is rotated to the second position, the second sub-duct is in a closed first state and the first sub-duct is in a connected second state.

[0013] In some embodiments, the air cavity is further provided with a first opening and a second opening communicating with the outside, and the damper assembly further includes a second damper, which is rotatably installed in the air cavity and is used to rotatably open or close the second opening;

[0014] When the first damper is rotated to the first position, both the first sub-duct and the second sub-duct are in a connected second state, and the first opening is in a closed state; when the first damper is rotated to the third position, both the first sub-duct and the second sub-duct are in a connected second state, and the first opening is in an open state.

[0015] In some embodiments, along the airflow direction, the air cavity includes an adjacent first sub-air cavity and a second sub-air cavity, the partition is disposed in the second sub-air cavity, and the drying tunnel assembly further includes a first fan, which is disposed in the first sub-air cavity.

[0016] In some embodiments, the drying tunnel assembly further includes an auxiliary heating device disposed in the second sub-duct.

[0017] In some embodiments, the auxiliary heating device includes:

[0018] The second fan consists of several air-blowing blades;

[0019] A plurality of heating elements, at least one of the air supply blades is provided with the heating element, the heating element being used to heat the air supplied by the air supply blades.

[0020] In some embodiments, the heating element includes one or more of a heating wire, a heating element, a heating tube, and a heating coating.

[0021] In some embodiments, the drying tunnel assembly further includes a first filter device and a second filter device, wherein the first filter device is disposed at the air inlet in the air cavity and the second filter device is disposed at the air outlet in the air cavity.

[0022] A clothes dryer, comprising:

[0023] A clothes dryer drum, including an air inlet and an air outlet;

[0024] The aforementioned drying tunnel assembly is connected to the air inlet and the air outlet.

[0025] The drying duct assembly and dryer provided in this application embodiment include a drying duct comprising at least two mutually separated sub-ducts. By changing the connection state of several sub-ducts through the damper assembly, the air speed in the drying duct can be adjusted. When the dryer needs to accelerate drying, the air circulation rate between the drying drum and the drying assembly can be increased by reducing the number of connected sub-ducts, thereby accelerating the drying speed. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0028] Figure 1 This is a schematic diagram of the dryer provided in the first state according to an embodiment of this application.

[0029] Figure 2 This is a schematic diagram of the dryer provided in the second state according to an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the dryer provided in the third state according to an embodiment of this application.

[0031] Figure 4 This is another structural example diagram of the dryer provided in the embodiments of this application.

[0032] Figure 5 This is a schematic diagram of the auxiliary heating device provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Clothes dryer;

[0035] 100. Drying drum; 200. Drying tunnel assembly; 300. Heat pump system; 400. Auxiliary condenser;

[0036] 110. Air inlet; 120. Air outlet; 210. Drying air duct; 220. Air damper assembly; 230. First fan; 240. Auxiliary heating device; 250. First filter device; 260. Second filter device;

[0037] 211. Sub-duct; 212. Duct shell; 213. Partition; 221. First damper; 222. Second damper; 241. Second fan; 242. Heating element;

[0038] 2111, First Sub-Air Duct; 2112, Second Sub-Air Duct; 2113, Third Sub-Air Duct; 2121, Air Inlet; 2122, Air Outlet; 2123, Air Chamber; 2124, First Opening; 2125, Second Opening;

[0039] 2123a, First sub-wind cavity; 2123b, Second sub-wind cavity. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0041] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0043] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0044] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0045] This application provides a drying tunnel assembly for use in a clothes dryer. The dryer can be a drying device with only drying function, or a washer-dryer combo with both washing and drying functions. For example, please refer to... Figures 1-3 , Figure 1 This is a schematic diagram of the dryer provided in the embodiments of this application in its first state. Figure 2 This is a schematic diagram of the dryer provided in the embodiments of this application in a second state. Figure 3 This is a schematic diagram of the dryer provided in the embodiments of this application in a third state. The dryer 10 includes a drying drum 100 and a drying tunnel assembly 200. The drying drum 100 includes an air inlet 110 and an air outlet 120.

[0046] The drying tunnel assembly 200 includes a drying air duct 210 and an air damper assembly 220. The drying air duct 210 includes at least two mutually spaced sub-ducts, each of which is connected at both ends to an air inlet 110 and an air outlet 120, respectively. The air damper assembly 220 is disposed in the drying air duct 210 and is used to movably keep at least one sub-duct in a closed first state or keep each sub-duct in a connected second state.

[0047] It should be noted that each sub-duct is connected to the air inlet 110 and the air outlet 120 at both ends, respectively, indicating that each sub-duct is connected to the inside of the drying drum 100 through the air inlet 110 and the air outlet 120, thereby enabling air circulation between the sub-duct and the drying drum 100. The sub-duct is in a closed first state, meaning that at least a portion of the duct section is blocked by the damper assembly 220, causing airflow to be obstructed or interrupted when it flows into the sub-duct, thus preventing airflow from exiting the sub-duct outlet. The sub-duct is in a connected second state, meaning that there are no blocked duct sections in the sub-duct, and airflow can normally exit through the sub-duct outlet after entering the sub-duct through the inlet.

[0048] Understandably, when air circulates between the drying drum 100 and the drying duct 210, the cross-sectional area of ​​airflow in the drying duct 210 is positively correlated with the number of sub-ducts in the connected second state; that is, the more sub-ducts in the connected second state, the larger the cross-sectional area of ​​airflow in the drying duct 210. Simultaneously, the air velocity in the drying duct 210 is negatively correlated with the cross-sectional area of ​​airflow in the drying duct 210; that is, the smaller the cross-sectional area of ​​airflow in the drying duct 210, the greater the air velocity. Based on this, by changing the connection state of several sub-ducts through the damper assembly 220, the air velocity in the drying duct 210 can be adjusted.

[0049] The drying duct assembly 200 provided in this application embodiment includes a drying air duct 210 comprising at least two mutually spaced sub-air ducts. By changing the connection state of several sub-air ducts through the damper assembly 220, the air speed in the drying air duct 210 can be adjusted. When the dryer 10 needs to accelerate drying, the number of connected sub-air ducts can be reduced to increase the air circulation rate between the drying drum 100 and the drying assembly, thereby accelerating the drying speed.

[0050] For example, such as Figure 1 As shown, the drying air duct 210 includes a first sub-air duct 2111 and a second sub-air duct 2112. The drying air duct 210 includes an air duct housing 212 and a partition 213. The air duct housing 212 forms an air cavity with an air inlet 2121 and an air outlet 2122. The air outlet 2122 is adapted to connect to the air inlet 110, and the air inlet 2121 is adapted to connect to the air outlet 120. The partition 213 is disposed in the air cavity and is adapted to separate the air cavity to form adjacent first sub-air ducts 2111 and second sub-air ducts 2112.

[0051] The ventilation cross-sectional areas of the first sub-duct 2111 and the second sub-duct 2112 can be the same, or the ventilation cross-sectional area of ​​the second sub-duct 2112 can be smaller than that of the first sub-duct 2111, or the ventilation cross-sectional area of ​​the second sub-duct 2112 can be larger than that of the first sub-duct 2111.

[0052] In some embodiments, the damper assembly 220 includes a first damper 221, which is rotatably mounted in the air cavity; when the first damper 221 rotates to such a position... Figure 1 In the first position shown, both the first sub-air duct 2111 and the second sub-air duct 2112 are in a connected second state. When the first damper 221 rotates to the position shown... Figure 2 In the second position shown, the second sub-duct 2112 is in a closed first state and the first sub-duct 2111 is in a connected second state.

[0053] In practical applications, when the user selects accelerated drying, the dryer 10 can control the first damper 221 to rotate to the second position, so that the second sub-duct 2112 switches to the closed first state, so that air can only circulate through the first sub-duct 2111. The ventilation cross-sectional area of ​​the drying duct 210 is reduced, the air velocity in the drying duct 210 increases, the air circulation rate between the drying drum 100 and the drying components is increased, and the drying speed is accelerated.

[0054] In some embodiments, the air cavity further includes a first opening 2124 and a second opening 2125 communicating with the outside. The damper assembly 220 also includes a second damper 222, which is rotatably mounted in the air cavity and is used to rotatably open or close the second opening 2125. When the first damper 221 rotates to such a position... Figure 1 In the first position shown, both the first sub-duct 2111 and the second sub-duct 2112 are in a connected second state, and the first opening 2124 is in a closed state; when the first damper 221 rotates to the position shown... Figure 3 In the third position shown, both the first sub-air duct 2111 and the second sub-air duct 2112 are in the second connected state, and the first opening 2124 is in the open state.

[0055] It should be noted that the first opening 2124 and the second opening 2125 are used to connect to the outside. When both the first opening 2124 and the second opening 2125 are open, one of the first opening 2124 and the second opening 2125 near the air inlet 2121 is used to guide the air in the drying air duct 210 to the outside, and the other is used to introduce the outside air into the drying air duct 210.

[0056] For example, the second opening 2125 is disposed on the side of the first opening 2124 near the air inlet 2121; when both the first opening 2124 and the second opening 2125 are open, the second opening 2125 is used to guide the air in the drying air duct 210 to the outside, and the first opening 2124 is used to introduce the outside air into the drying air duct 210. In practical applications, when the dryer 10 dries clothes, both the first opening 2124 and the second opening 2125 are closed. The circulating air in the circulating air path dries the clothes in the drying drum 100 through the heat pump system 300. When the dryer 10 dehumidifies the internal air, both the first opening 2124 and the second opening 2125 are open, so that the hot and humid air inside continuously flows out of the drying air duct 210 from the first opening 2124, while the outside air continuously flows into the drying air duct 210 through the second opening 2125. In this way, the humidity of the internal air of the dryer 10 gradually decreases due to the exchange of air with the outside, thereby achieving rapid dehumidification of the clothes and improving the drying efficiency of the dryer 10.

[0057] In some other embodiments, the number of partitions 213 may be two or more to divide the air cavity into multiple sub-air ducts; for example, the number of partitions 213 may be two or three. For example, please refer to [link to relevant documentation]. Figure 4 , Figure 4 This is another structural example diagram of the dryer provided in the embodiments of this application. There are two partitions 213, which divide the air cavity into sequentially adjacent first sub-air ducts 2111, second sub-air ducts 2112, and third sub-air ducts 2113. The ventilation cross-sectional areas of the first sub-air ducts 2111, second sub-air ducts 2112, and third sub-air ducts 2113 are, for example, the same. The damper assembly 220 includes, for example, a first damper 221, which is rotatably mounted in the air cavity. When the first damper 221 rotates to such a position... Figure 4 In the first position shown, the first sub-air duct 2111, the second sub-air duct 2112, and the third sub-air duct 2113 are all in a connected second state, at which point the ventilation cross-sectional area of ​​the drying duct 210 reaches its maximum. When the first damper 221 rotates to the second position, the second sub-air duct 2112 is in a closed first state, and the first sub-air duct 2111 and the third sub-air duct 2113 are in a connected second state. When the first damper 221 rotates to the fourth position, the second sub-air duct 2112 and the first sub-air duct 2111 are both in a closed first state, and the third sub-air duct 2113 is in a connected second state, at which point the ventilation cross-sectional area of ​​the drying duct 210 reaches its minimum. In practical applications, users can switch between the first damper 221 in the first, second, and fourth positions to adjust the ventilation cross-sectional area of ​​the drying duct 210, thereby matching the user's drying speed requirements for the dryer 10.

[0058] In some embodiments, along the airflow direction, the air cavity includes a first sub-air cavity 2123a and a second sub-air cavity adjacent to each other. A partition 213 is disposed in the second sub-air cavity. The drying duct assembly 200 also includes a first fan 230, which is disposed in the first sub-air cavity 2123a. It should be noted that the dryer 10 operates through the first fan 230 to achieve air circulation between the drying drum 100 and the drying duct 210, as well as air exchange between the drying duct 210 and the outside environment.

[0059] In some embodiments, the drying tunnel assembly 200 further includes an auxiliary heating device 240 disposed in the second sub-air duct 2112. The auxiliary heating device 240 heats the air flowing through the second sub-air duct 2112, allowing the heated air to evaporate and carry away more water from the clothes after flowing back into the drying drum 100, thus accelerating the evaporation rate and improving drying efficiency. Additionally, the auxiliary heating device 240 also improves the uniformity of the air temperature distribution inside the dryer 10, preventing some areas from being too hot or too cold, which could lead to uneven drying of the clothes. Optionally, the auxiliary heating device 240 can be a heating element, heating tube, heating wire, heating fan, etc.

[0060] For example, please refer to Figure 5 , Figure 5 This is a schematic diagram of the auxiliary heating device provided in the embodiments of this application. The auxiliary heating device 240 is a heating fan, including a second fan 241 and a plurality of heating elements 242. The second fan 241 includes a plurality of air delivery blades; at least one air delivery blade is provided with a heating element 242, which is used to heat the air delivered by the air delivery blades. This improves the uniformity and efficiency of air heating by the auxiliary heating device 240, while also providing air delivery and increasing the air velocity in the duct. The heating element 242 may include one or more of the following: heating wire, heating plate, heating tube, and heating coating. Preferably, the second fan 241 is an axial flow fan; the heating element 242 is a heating coating, which may be a graphene heating coating, a thick film heating coating, or a carbon crystal heating coating.

[0061] In some embodiments, the drying tunnel assembly 200 further includes a first filter device 250 and a second filter device 260. The first filter device 250 is disposed at the air inlet 2121 in the air cavity, and the second filter device 260 is disposed at the air outlet 2122 in the air cavity. Thus, by providing filter devices at the air inlet 2121 and the air outlet 2122 respectively, the filtration effect of the drying tunnel assembly 200 on lint can be improved, reducing the possibility of safety accidents caused by lint adhering to the heating device, and also improving the cleanliness of the clothes after drying. The first filter device 250 and the second filter device 260 may each include multiple layers of filter screens.

[0062] The drying duct assembly 200 provided in this application embodiment includes a drying air duct 210 comprising at least two mutually spaced sub-air ducts. By changing the connection state of several sub-air ducts through the damper assembly 220, the air speed in the drying air duct 210 can be adjusted. When the dryer 10 needs to accelerate drying, the number of connected sub-air ducts can be reduced to increase the air circulation rate between the drying drum 100 and the drying assembly, thereby accelerating the drying speed.

[0063] This application also provides a clothes dryer, such as... Figures 1-4 As shown, the dryer 10 includes a drying drum 100, a heat pump system 300, and the aforementioned drying tunnel assembly 200. The drying drum 100 includes an air inlet 110 and an air outlet 120.

[0064] The drying tunnel assembly 200 includes a drying air duct 210 and an air damper assembly 220. The drying air duct 210 includes at least two mutually spaced sub-ducts, each of which is connected at both ends to an air inlet 110 and an air outlet 120, respectively. The air damper assembly 220 is disposed in the drying air duct 210 and is used to movably keep at least one sub-duct in a closed first state or keep each sub-duct in a connected second state.

[0065] The heat pump system 300 is installed on the drying duct assembly 200. The dryer 10 uses the heat pump system 300 to heat and dehumidify the air in the drying duct 210, thereby drying the clothes. The heat pump system 300 is, for example, located in the first air chamber and between the first fan 230 and the air inlet 2121.

[0066] In some embodiments, the dryer 10 further includes an auxiliary condensing device 400, which is disposed in the air cavity 2123, such as the first sub-air cavity 2123a, and located between the air inlet 2121 and the condenser of the dryer 10. The auxiliary condensing device 400 assists the condenser of the dryer 10 in cooling the air flowing into the air inlet 2121 to improve the drying efficiency of the dryer 10.

[0067] The clothes dryer 10 provided in this application embodiment includes a drying air duct 210 comprising at least two mutually spaced sub-air ducts. By changing the connection state of several sub-air ducts through the damper assembly 220, the air speed in the drying air duct 210 can be adjusted. When the clothes dryer 10 needs to accelerate drying, the number of connected sub-air ducts can be reduced to increase the air circulation rate between the drying drum 100 and the drying components, thereby accelerating the drying speed.

[0068] The drying tunnel components and dryers provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A drying tunnel assembly, characterized in that, Applied to a clothes dryer, the clothes dryer includes a drying drum, the drying drum includes an air inlet and an air outlet, and the drying tunnel assembly includes: The drying air duct includes at least two mutually spaced sub-ducts, each of which is connected at both ends to the air inlet and the air outlet, respectively. An air damper assembly, disposed in the drying air duct, is used to movably bring at least one of the sub-ducts into a closed first state, or to bring each of the sub-ducts into a connected second state.

2. The drying tunnel assembly according to claim 1, characterized in that, The drying air duct includes a first sub-air duct and a second sub-air duct; the drying air duct includes: The air duct housing forms an air cavity with an air inlet and an air outlet, the air outlet being adapted to connect with the air inlet and the air inlet being adapted to connect with the air outlet; A partition is disposed in the air cavity and is adapted to separate the air cavity to form adjacent first sub-air ducts and second sub-air ducts.

3. The drying tunnel assembly according to claim 2, characterized in that, The damper assembly includes a first damper, which is rotatably mounted in the air cavity; When the first damper is rotated to the first position, both the first sub-duct and the second sub-duct are in a connected second state. When the first damper is rotated to the second position, the second sub-duct is in a closed first state and the first sub-duct is in a connected second state.

4. The drying tunnel assembly according to claim 3, characterized in that, The air cavity is also provided with a first opening and a second opening that connect to the outside. The damper assembly also includes a second damper, which is rotatably installed in the air cavity and is used to rotatably open or close the second opening. When the first damper is rotated to the first position, both the first sub-duct and the second sub-duct are in a connected second state, and the first opening is in a closed state; when the first damper is rotated to the third position, both the first sub-duct and the second sub-duct are in a connected second state, and the first opening is in an open state.

5. The drying tunnel assembly according to claim 2, characterized in that, Along the airflow direction, the air cavity includes an adjacent first sub-air cavity and a second sub-air cavity, the partition is disposed in the second sub-air cavity, and the drying tunnel assembly also includes a first fan, which is disposed in the first sub-air cavity.

6. The drying tunnel assembly according to any one of claims 1-5, characterized in that, It also includes an auxiliary heating device, which is disposed in the second sub-air duct.

7. The drying tunnel assembly according to claim 6, characterized in that, The auxiliary heating device includes: The second fan consists of several air-blowing blades; A plurality of heating elements, at least one of the air supply blades is provided with the heating element, the heating element being used to heat the air supplied by the air supply blades.

8. The drying tunnel assembly according to claim 7, characterized in that, The heating element includes one or more of the following: heating wire, heating element, heating tube, and heating coating.

9. The drying tunnel assembly according to any one of claims 1-5, characterized in that, It also includes a first filter device and a second filter device, wherein the first filter device is disposed at the air inlet in the air cavity and the second filter device is disposed at the air outlet in the air cavity.

10. A clothes dryer, characterized in that, include: A clothes dryer drum, including an air inlet and an air outlet; The drying tunnel assembly as described in any one of claims 1-9, wherein the drying tunnel assembly is connected to the air inlet and the air outlet.

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