Laundry treating apparatus

Abstract

This utility model relates to the field of garment processing technology, specifically providing a garment processing device. Specifically, the garment processing device of this utility model includes a door, a drum, and a drying device. The drying device includes a circulating air duct, and a bypass air duct is provided inside the door. The air inlet of the bypass air duct is close to the air inlet end of the circulating air duct, and the air outlet faces the drum opening. A fan is installed in the bypass air duct, which can draw a portion of the airflow discharged from the drum opening into the bypass air duct and spray the airflow from the air outlet into the drum to exchange heat and moisture with the garment again. By setting a bypass air duct inside the door and installing a fan inside the bypass air duct, the fan can draw a portion of the airflow discharged from the drum opening into the bypass air duct and spray the airflow into the drum through the air outlet to exchange heat and moisture with the garment again. This increases the moisture content and lowers the temperature of the airflow before it enters the circulating air duct for heat exchange, which is beneficial for improving the condensation effect, thereby increasing drying efficiency and reducing drying time.

Description

Technical Field

[0001] This utility model relates to the field of clothing processing technology, and specifically provides a clothing processing device. Background Technology

[0002] Existing garment processing equipment mainly includes dryers and washer-dryer combos.

[0003] Taking a clothes dryer as an example, a clothes dryer is a device used to dry clothes. It mainly includes a cabinet and a drum and drying unit installed inside the cabinet. The drying unit is connected to the drum and can deliver hot air into the drum to dry the clothes inside. However, the drying time of existing clothes dryers is relatively long, resulting in a poor user experience.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the problem of long drying time in existing clothing processing equipment.

[0006] In a first aspect, the present invention provides a garment processing device, comprising a housing, a door pivotally connected to the housing, and a drum and a drying device installed inside the housing. The drying device includes a circulating air duct, the air inlet of which is located near the opening of the drum. A bypass air duct is provided inside the door, the air inlet of which is located near the air inlet of the circulating air duct, and the air outlet of which faces the opening of the drum. The garment processing device further includes a fan installed in the bypass air duct, which is capable of drawing a portion of the airflow discharged from the opening of the drum into the bypass air duct and spraying the airflow from the air outlet into the drum, where it exchanges heat and moisture with the garments in the drum again.

[0007] In the preferred embodiment of the above-mentioned clothing processing equipment, the air inlet of the circulating air duct is located near the bottom of the cylinder opening, the air inlet is located above the air inlet of the circulating air duct, and the position of the air outlet corresponds to the middle or upper part of the cylinder opening.

[0008] In the preferred embodiment of the above-mentioned clothing processing equipment, the fan is installed near the air outlet.

[0009] In the preferred embodiment of the above-mentioned clothing processing equipment, the number of air inlets is at least two and they are distributed at intervals along the length of the air inlet end of the circulating air duct.

[0010] In the preferred embodiment of the above-mentioned clothing processing equipment, the clothing processing equipment further includes a filter screen, which is installed at the air outlet.

[0011] In the preferred embodiment of the above-mentioned garment processing equipment, the circulating air duct includes an air inlet duct, a heat exchange duct, and an air outlet duct connected in sequence. The air inlet end of the air inlet duct is located near the cylinder opening, and multiple ventilation openings are provided on the rear cylinder wall of the roller. The air outlet end of the air outlet duct is located near the rear cylinder wall.

[0012] In the preferred embodiment of the above-mentioned garment processing equipment, the garment processing equipment further includes a lint collection device, which is installed inside the air inlet duct.

[0013] In the preferred embodiment of the above-mentioned clothing processing equipment, the drying device further includes a support member installed in front of the drum opening, the support member having a pick-up and drop-off port at a position corresponding to the drum opening, the door being able to close the pick-up and drop-off port, and the air inlet duct being disposed within the support member.

[0014] In the preferred embodiment of the above-mentioned garment processing equipment, the circulating air duct is located below the roller.

[0015] In the preferred embodiment of the above-mentioned clothing processing equipment, the drying device further includes a heat pump module, wherein the evaporator and condenser of the heat pump module are both installed in the circulating air duct, and the evaporator is located upstream of the condenser along the airflow direction.

[0016] By adopting the above technical solution, the garment processing equipment of this utility model has a side ventilation duct installed inside the door. The air inlet of the side ventilation duct is set close to the air inlet of the circulating air duct, and the air outlet of the side ventilation duct is set facing the drum opening. A fan is installed in the side ventilation duct. In the middle and late stages of drying, the fan is turned on. Part of the airflow discharged from the drum opening enters the circulating air duct, and another part of the airflow is drawn into the side ventilation duct by the fan and sprayed into the drum through the air outlet. Since this part of the airflow has not yet entered the circulating air duct, it has not yet exchanged heat with the evaporator in the circulating air duct. The airflow returned to the drum can exchange heat and moisture with the clothes in the drum again, which increases the moisture content of the airflow and lowers the temperature. Then it enters the circulating air duct to exchange heat with the evaporator, which helps to improve the condensation effect, thereby improving the drying efficiency and reducing the drying time.

[0017] Furthermore, the garment processing equipment of this utility model sets the air inlet of the circulating air duct close to the bottom of the drum opening, and positions the air outlet of the side ventilation duct corresponding to the middle or upper part of the drum opening. The airflow sprayed from the air outlet can enter the drum from the middle or upper part of the drum opening, which is more effective, improves drying efficiency, and reduces drying time.

[0018] Furthermore, the clothing processing equipment of this utility model installs the fan near the air outlet of the side ventilation duct, resulting in a stronger airflow from the air outlet. This facilitates more thorough heat and moisture exchange with the clothes in the drum, thereby improving drying efficiency and reducing drying time.

[0019] Furthermore, the clothing processing equipment of this utility model can increase the airflow into the bypass ventilation duct by setting multiple air inlets on the door, which is more conducive to improving drying efficiency and reducing drying time.

[0020] Furthermore, the clothing processing equipment of this utility model can filter the airflow by installing a filter screen at the air outlet of the side ventilation duct. In addition, placing the filter screen at the air outlet makes it easy to remove the filter screen for cleaning lint on the filter screen and lint at the air outlet.

[0021] Furthermore, the garment processing equipment of this utility model has a more reasonable layout by setting a support member in front of the roller and placing the air inlet of the circulating air duct on the support member, so that the air inlet set on the door can be located directly above the air inlet end of the air inlet duct. Attached Figure Description

[0022] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a structural schematic diagram of the clothes dryer of this utility model;

[0024] Figure 2 This is a structural schematic diagram of the door, roller, and support components of the dryer of this utility model;

[0025] Figure 3 This is a structural diagram of the door, support components, and filter screen of the dryer of this utility model;

[0026] Figure 4 This is a structural schematic diagram of the door and fan of the clothes dryer of this utility model;

[0027] Figure 5 This is a schematic diagram of the door of the dryer according to this utility model;

[0028] Figure 6 This is a structural schematic diagram of the support component of the dryer of this utility model.

[0029] List of reference numerals in the attached diagram:

[0030] 1. Drum; 11. Rear drum wall; 12. Ventilation opening; 2. Circulating air duct; 21. Air inlet duct; 22. Heat exchange air duct; 23. Air outlet duct; 31. Evaporator; 32. Condenser; 4. Fan; 5. Door; 51. Air inlet; 52. Air outlet; 53. Bypass ventilation duct; 6. Supporting components; 61. Loading / unloading port; 62. Base; 63. Support plate; 7. Fan; 8. Filter screen. Detailed Implementation

[0031] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the embodiments described below are in conjunction with a clothes dryer, the technical solution of the present invention is also applicable to other clothing processing equipment with drying functions, such as washer-dryer combos.

[0032] It should be noted that in the description of this utility model, terms such as "left" and "right" that indicate direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connect," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Specifically, this utility model provides a clothes dryer, such as Figure 1 and Figure 2 As shown, the dryer of this utility model includes a housing (not shown in the figure), a door 5, a drum 1, and a drying device. The door 5 is pivotally connected to the housing, the drum 1 is rotatably installed inside the housing, and the drying device is connected to the drum 1 and can deliver hot air into the drum 1 to dry the clothes in the drum 1.

[0035] Preferably, such as Figure 1As shown, the drying device of this utility model includes a circulating air duct 2, a fan 4, and a drying module. The circulating air duct 2 is connected to the drum 1. The drying module includes a compressor (not shown in the figure), an evaporator 31, a condenser 32, a refrigerant pipe, and a throttling element installed on the refrigerant pipe. The refrigerant pipe connects the compressor to the evaporator 31 and the condenser 32 to form a refrigerant circulation loop. The evaporator 31 and the condenser 32 are installed in the circulating air duct 2. Along the airflow direction, the evaporator 31 is located upstream of the condenser 32. The fan 4 is used to make the airflow circulate in the drum 1 and the circulating air duct 2.

[0036] When the drying mode is executed, the fan 4 and the compressor are started. Under the action of the fan 4, the airflow circulates between the drum 1 and the circulating air duct 2. The evaporator 31 is used to dehumidify the circulating airflow in the circulating air duct 2, and the condenser 32 is used to heat the airflow in the circulating air duct 2.

[0037] For example, such as Figure 1 As shown, the drum 1 is horizontally positioned. The right end of the drum 1 has an opening through which the user can put and take out clothes. The left end of the drum 1 is the rear drum wall 11, which has multiple vents 12. The circulating air duct 2 is located below the drum 1. The air inlet of the circulating air duct 2 is located near the opening, and the air outlet of the circulating air duct 2 extends to the rear drum wall 11 of the drum 1. The fan 4 is installed in the circulating air duct 2 and is located near the air outlet of the circulating air duct 2. After the fan 4 is turned on, the hot and humid airflow in the drum 1 is discharged from the opening of the drum 1 and enters the circulating air duct 2. When the hot and humid airflow flows through the evaporator 31, it exchanges heat with the evaporator 31, and the moisture carried by the hot and humid airflow condenses. When the circulating airflow flows through the condenser 32, it absorbs the heat dissipated by the condenser 32, and the temperature rises. The high-temperature airflow returns to the drum 1 from the vents 12 on the rear drum wall 11 of the drum 1 and exchanges heat and moisture with the clothes in the drum 1.

[0038] It should be noted that the location of the fan 4 is not limited to the position near the air outlet of the circulating air duct 2 as described above. For example, the fan 4 can also be located near the air inlet of the circulating air duct 2, or between the evaporator 31 and the condenser 32, etc. Such adjustments and changes to the specific location of the fan 4 do not deviate from the principle and scope of this utility model and should be limited to the protection scope of this utility model.

[0039] Furthermore, it should be noted that the circulating air duct 2 is not limited to being located below the roller 1. For example, the circulating air duct 2 can also be located above or on the side of the roller 1. Of course, the present invention preferably places the circulating air duct 2 below the roller 1.

[0040] Furthermore, it should be noted that those skilled in the art can also omit the heat pump module in practical applications and replace the evaporator 31 and condenser 32 with other types of dehumidifying and heating components to dehumidify and heat the circulating airflow in the circulating air duct 2. Such flexible adjustments and changes do not deviate from the principles and scope of this utility model and should be limited to the protection scope of this utility model.

[0041] The technical solution of this utility model will be further described below using a heat pump module as an example.

[0042] Preferably, such as Figures 1 to 5 As shown, the door 5 of the dryer of this utility model is provided with a side ventilation duct 53. The air inlet 51 of the side ventilation duct 53 is close to the air inlet end of the circulating air duct 2, and the air outlet 52 of the side ventilation duct 53 is arranged facing the opening of the drum 1. The dryer of this utility model also includes a fan 7 installed in the side ventilation duct 53. The fan 7 can draw a part of the airflow discharged from the opening of the drum 1 into the side ventilation duct 53 and spray the airflow from the air outlet 52 into the drum 1, so as to exchange heat and moisture with the clothes in the drum 1 again.

[0043] As the drying mode is running, the humidity of the clothes in drum 1 will gradually decrease. In the middle and later stages of drying, the air discharged from drum 1 has a low moisture content and a high temperature. When it flows through evaporator 31, the condensation effect is poor, resulting in extremely low drying efficiency and a long drying time.

[0044] This invention features a bypass ventilation duct 53 within the door 5, with its air inlet 51 positioned close to the air inlet of the circulating air duct 2 and its air outlet 52 facing the opening of the drum 1. A fan 7 is installed within the bypass ventilation duct 53. During the later stages of drying, the fan 7 is activated, causing a portion of the airflow discharged from the drum 1 to enter the circulating air duct 2, while another portion is drawn into the bypass ventilation duct 53 by the fan 7 and sprayed into the drum 1 through the air outlet 52. Since this portion of the airflow has not yet entered the circulating air duct 2, it has not yet undergone heat exchange with the evaporator 31 in the circulating air duct 2. The airflow returned to the drum 1 can then undergo heat and moisture exchange with the clothes in the drum 1 again, increasing the moisture content and lowering the temperature of the airflow before it re-enters the circulating air duct 2 to exchange heat with the evaporator 31. This improves the condensation effect, thereby increasing drying efficiency and reducing drying time.

[0045] For example, the fan 7 is installed near the air outlet 52 of the bypass ventilation duct 53. Towards the later stages of drying, for instance, the fan can be controlled according to the drying program's running time. If the total drying program's running time is 60 minutes, the fan 7 is activated after 40 minutes. Under the action of the fan 7, a portion of the airflow just flowing out of the drum 1 is drawn into the bypass ventilation duct 53, then flows along the bypass ventilation duct 53, and is sprayed into the drum 1 from the air outlet 52, where it again exchanges heat and moisture with the clothes in the drum 1. Preferably, the fan 7 is an ultra-high-speed fan.

[0046] It should be noted that, in practical applications, those skilled in the art may also place the fan 7 in other locations of the bypass ventilation duct 53, for example, in the middle of the bypass ventilation duct 53 or near the air inlet 51 of the bypass ventilation duct 53.

[0047] Of course, in this invention, the fan 7 is preferably positioned near the air outlet 52 of the side ventilation duct 53. By installing the fan 7 near the air outlet 52 of the side ventilation duct 53, the airflow ejected from the air outlet 52 is stronger, which is conducive to more thorough heat and moisture exchange with the clothes in the drum 1, thereby improving drying efficiency and reducing drying time.

[0048] Preferably, such as Figures 1 to 5 As shown, the air inlet of the circulating air duct 2 of this utility model is located near the bottom of the cylinder opening of the roller 1, the air inlet 51 of the bypass ventilation duct 53 is located above the air inlet of the circulating air duct 2, and the air outlet 52 of the bypass ventilation duct 53 is located corresponding to the middle or upper part of the cylinder opening of the roller 1.

[0049] By positioning the air inlet of the circulating air duct 2 close to the bottom of the drum 1 opening, and positioning the air outlet 52 of the bypass air duct 53 corresponding to the middle or upper part of the drum 1 opening, the airflow ejected from the air outlet 52 can enter the drum 1 from the middle or upper part of the drum opening, resulting in better performance, improved drying efficiency, and reduced drying time.

[0050] For example, such as Figures 1 to 4 As shown, the air outlet 52 of the bypass ventilation duct 53 is located in the middle area of ​​the door body 5, and the position of the air outlet 52 corresponds exactly to the middle of the cylinder opening of the roller 1.

[0051] Preferably, such as Figure 3 and Figure 4 As shown, the dryer of this utility model also includes a filter screen 8, which is installed at the air outlet 52 of the bypass ventilation duct 53.

[0052] By installing a filter screen 8 at the air outlet 52 of the bypass ventilation duct 53, the lint carried by the airflow can be filtered.

[0053] For example, the air outlet 52 is circular in shape, and the filter screen 8 is square in shape, completely covering the air outlet 52. Preferably, the filter screen 8 is detachably fixed to the door body 5, which facilitates the removal of the filter screen 8 to clean the lint on the filter screen 8 and the lint at the air outlet 52, ensuring that the air outlet 52 is unobstructed.

[0054] Preferably, such as Figures 3 to 5 As shown, the number of air inlets 51 on the door body 5 of this utility model is at least two, and they are distributed at intervals along the length direction of the air inlet end of the circulating air duct 2.

[0055] By setting multiple air inlets 51 on the door body 5, the airflow into the bypass ventilation duct 53 can be increased, which is more conducive to improving drying efficiency and reducing drying time.

[0056] For example, two air inlets 51 are provided at the bottom of the door body 5. The two air inlets 51 are located on the left and right sides of the door body 5 respectively. After the fan 7 is started, the two air inlets 51 can simultaneously draw in air.

[0057] Preferably, such as Figure 2 , Figure 3 and Figure 6 As shown, the drying device of the dryer of this utility model also includes a support member 6, which is located in front of the drum 1. The support member 6 is provided with a pick-up and put-out opening 61 at a position corresponding to the opening of the drum 1, and the door 5 can close the pick-up and put-out opening 61.

[0058] The support member 6 is installed between the roller 1 and the front panel of the box. It should be noted that this utility model does not limit the specific structural form of the support member 6. For example, the support member 6 can be set as a support plate or a support frame, etc.

[0059] When a user needs to retrieve or place clothing, they can open the retrieval opening 61 on the support member 6 by rotating the door 5. After the clothing has been retrieved or placed, the retrieval opening 61 on the support member 6 can be closed by the door 5.

[0060] Preferably, such as Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the circulating air duct 2 of this utility model includes an air inlet duct 21, a heat exchange duct 22 and an air outlet duct 23 connected in sequence. The air inlet end of the air inlet duct 21 is located near the cylinder opening of the roller 1, and the air outlet end of the air outlet duct 23 is located near the rear cylinder wall 11 of the roller 1.

[0061] For example, such as Figure 1As shown, the air inlet duct 21 is located at the lower right of the drum 1. The air inlet duct 21 extends vertically, and its top end is the air inlet end, which is located near the drum opening of the drum 1. The bottom end of the air inlet duct 21 is connected to the right end of the heat exchange duct 22. The heat exchange duct 22 is located directly below the drum 1. The heat exchange duct 22 extends horizontally and is parallel to the axis of the drum 1. The evaporator 31 and condenser 32 of the heat pump module are both installed in the heat exchange duct 22. The air outlet duct 23 is located at the lower left of the drum 1. The air outlet duct 23 also extends vertically, and its top end is the air outlet end, which is located near the rear drum wall 11 of the drum 1. The bottom end of the air outlet duct 23 is connected to the left end of the heat exchange duct 22. The fan 4 is installed in the air outlet duct 23. The

[0062] For example, such as Figure 2 , Figure 3 and Figure 6 As shown, the air inlet duct 21 is disposed within the support member 6. The support member 6 includes a base 62 and a support plate 63 disposed on the base 62. The air inlet duct 21 is specifically disposed within the base 62. The take-up and put-down port 61 is disposed on the support plate 63. The support plate 63 is vertically disposed. The take-up and put-down port 61 is disposed corresponding to the opening of the roller 1. When the dryer is running, the take-up and put-down port 61 is closed by the door 5 of the dryer.

[0063] During the drying process, the airflow discharged from the drum 1 first enters the air inlet duct 21, then enters the heat exchange duct 22 to exchange heat with the evaporator 31 and condenser 32, achieving dehumidification and heating. Then, it flows along the air outlet duct 23 to the rear drum wall 11 of the drum 1, and returns to the drum 1 through the vent 12 on the rear drum wall 11. After the fan 7 is started, part of the airflow flowing out from the drum 1 enters the air inlet duct 21, and another part of the airflow is drawn into the side ventilation duct 53 inside the door 5 by the fan 7. It flows along the side ventilation duct 53 to the air outlet 52, and is sprayed into the drum 1 through the air outlet 52 to exchange moisture and heat with the clothes in the drum 1 again.

[0064] The dryer of this utility model has a more reasonable layout by setting a support member 6 in front of the drum 1 and placing the air inlet duct 21 of the circulating air duct 2 inside the support member 6, so that the air inlet 51 set on the door body 5 can be located exactly above the air inlet end of the air inlet duct 21.

[0065] Preferably, the dryer of this utility model further includes a lint collection device (not shown in the figure), which is installed in the air inlet duct 21.

[0066] By installing a wire shavings collection device in the air inlet duct 21, the airflow discharged from the cylinder opening of the drum 1 enters the air inlet duct 21, first flows through the wire shavings collection device for filtration, and then enters the heat exchange duct 22. When the airflow flows through the wire shavings collection device, the wire shavings and other impurities carried in the airflow are trapped in the wire shavings collection device.

[0067] Preferably, the lint collection device is detachably installed in the air inlet duct 21. For example, the lint collection device can be inserted into the air inlet duct 21 from the top. When the lint collection device needs to be cleaned, the user can pull it out from the top of the air inlet duct 21 after opening the door 5.

[0068] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0069] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A garment processing device, comprising a housing, a door (5) pivotally connected to the housing, and a drum (1) and a drying device installed inside the housing, the drying device comprising a circulating air duct (2), the air inlet of the circulating air duct (2) being disposed near the opening of the drum (1), characterized in that, A bypass ventilation duct (53) is provided inside the door body (5). The air inlet (51) of the bypass ventilation duct (53) is close to the air inlet end of the circulating air duct (2), and the air outlet (52) of the bypass ventilation duct (53) is arranged facing the cylinder opening. The garment processing equipment also includes a fan (7) installed in the bypass ventilation duct (53), which can draw a portion of the airflow discharged from the cylinder outlet into the bypass ventilation duct (53) and spray the airflow from the air outlet (52) into the drum (1) to exchange heat and moisture with the garments in the drum (1) again.

2. The garment processing equipment according to claim 1, characterized in that, The air inlet of the circulating air duct (2) is located near the bottom of the cylinder opening, the air inlet (51) is located above the air inlet of the circulating air duct (2), and the air outlet (52) is located in the middle or upper part of the cylinder opening.

3. The garment processing equipment according to claim 1, characterized in that, The fan (7) is installed near the air outlet (52).

4. The garment processing equipment according to claim 1, characterized in that, The number of air inlets (51) is at least two and they are distributed at intervals along the length of the air inlet end of the circulating air duct (2).

5. The garment processing equipment according to claim 1, characterized in that, The garment processing equipment also includes a filter (8), which is installed at the air outlet (52).

6. The garment processing equipment according to claim 1, characterized in that, The circulating air duct (2) includes an air inlet duct (21), a heat exchange duct (22), and an air outlet duct (23) connected in sequence. The air inlet end of the air inlet duct (21) is located near the cylinder opening. Multiple ventilation openings (12) are provided on the rear cylinder wall (11) of the roller (1). The air outlet end of the air outlet duct (23) is located near the rear cylinder wall (11).

7. The garment processing equipment according to claim 6, characterized in that, The garment processing equipment also includes a lint collection device, which is installed inside the air inlet duct (21).

8. The garment processing equipment according to claim 6, characterized in that, The drying device also includes a support member (6) installed in front of the cylinder opening. The support member (6) is provided with a pick-up and put-out port (61) at a position corresponding to the cylinder opening. The door (5) can close the pick-up and put-out port (61). The air inlet duct (21) is arranged inside the support member (6).

9. The garment processing equipment according to claim 1, characterized in that, The circulating air duct (2) is located below the roller (1).

10. The garment processing apparatus according to any one of claims 1 to 9, characterized in that, The drying device also includes a heat pump module, wherein the evaporator (31) and condenser (32) of the heat pump module are both installed in the circulating air duct (2), and the evaporator (31) is located upstream of the condenser (32) along the airflow direction.

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