Drying system and clothes drying equipment

Abstract

The invention discloses a drying system and clothes drying equipment, the drying system is used for the clothes drying equipment, and the drying system comprises a compressor used for compressing gas to obtain compressed gas; the vortex tube comprises an inlet, a heat tube and a cold tube, the inlet of the vortex tube is communicated with the outlet of the compressor, the vortex tube is used for processing the compressed gas to obtain hot airflow and cold airflow, the hot airflow is transmitted to a roller of the clothes drying equipment through the outlet of the heat tube, and the cold airflow is transmitted to the roller of the clothes drying equipment through the outlet of the heat tube. The cold air flows through an outlet of the cold pipe and is transmitted to the heat exchanger; a first inlet of the heat exchanger is communicated with an outlet of the cooling pipe, and the heat exchanger is used for inputting the cold airflow; a second inlet of the heat exchanger is communicated with the roller and used for inputting high-heat and high-humidity gas output by the roller, and heat exchange is achieved between the cold airflow and the high-heat and high-humidity gas in the heat exchanger. According to the scheme, the requirements for energy consumption and the drying speed can be met.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of drying equipment, and in particular to a drying system and a clothes drying equipment. Background Art

[0002] Clothes dryers and integrated washing and drying machines are equipped with drying systems, through which clothes can be dried. The drying system can generate hot air flow, input the hot air flow into the drum, and evaporate the moisture on the clothes in the drum to achieve drying of the clothes. At present, some drying systems have fast drying speed but high energy consumption, while others have low energy consumption but slow drying speed, and it is impossible to take into account both energy consumption and drying speed. Summary of the invention

[0003] The technical problem solved by the present invention is that the current drying system cannot take into account both energy consumption and drying speed.

[0004] To solve the above technical problems, an embodiment of the present invention provides a drying system for a clothing drying device, comprising: a compressor, used to compress gas to obtain compressed gas; a vortex tube, comprising an inlet, a heat pipe and a cold pipe, wherein the inlet of the vortex tube is connected to the outlet of the compressor, and the vortex tube is used to process the compressed gas to obtain a hot air flow and a cold air flow, the hot air flow is transmitted to the drum of the clothing drying device through the outlet of the heat pipe, and the cold air flow is transmitted to the heat exchanger through the outlet of the cold pipe; the heat exchanger, the first inlet of the heat exchanger is connected to the outlet of the cold pipe, for inputting the cold air flow; the second inlet of the heat exchanger is connected to the drum, for inputting high-heat and high-humidity gas output from the drum, wherein the cold air flow and the high-heat and high-humidity gas realize heat exchange in the heat exchanger.

[0005] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0006] The compressed air is processed by a vortex tube to obtain hot air flow and cold air flow. The hot air flow is input into the drum to dry the clothes to be dried in the drum. The cold air flow is input into the heat exchanger to exchange heat with the high-temperature and high-humidity gas output from the drum. The vortex tube can obtain the hot air flow for drying clothes and the cold air flow for cooling the high-temperature and high-humidity gas output from the drum without power supply. It has low cost and low energy consumption. It can meet the drying speed requirements by controlling the flow rate of the compressed gas input into the vortex tube and the flow rate of the hot air flow output, so as to take into account both energy consumption and drying speed.

[0007] Optionally, the outlet of the heat exchanger is connected to the inlet of the compressor.

[0008] Optionally, a filtering device is provided between the outlet of the heat exchanger and the inlet of the compressor for filtering the airflow input into the inlet of the compressor.

[0009] Optionally, a flow stabilizing device is provided between the filtering device and the inlet of the compressor, for stabilizing the airflow entering the compressor.

[0010] Optionally, the drying system further includes: a heating device, disposed between the outlet of the heat pipe and the drum, to heat the hot air flow output from the outlet of the heat pipe.

[0011] Optionally, the working state of the heating device is configured according to the inlet temperature of the airflow, and the working state includes: the heating power in the switch state and the on state; the inlet temperature refers to the temperature of the airflow when it enters the drum.

[0012] Optionally, the drum inlet temperature is configured according to the fabric type and / or drying mode of the clothes.

[0013] Optionally, the drying system also includes a flow regulating mechanism, which is arranged at the outlet of the heat pipe and is used to adjust the flow of the hot air flow output from the outlet of the heat pipe, and the flow regulating mechanism includes: an adjustable sleeve, which can be movably mounted on the outlet of the heat pipe; a conical core, which is located in the cavity of the adjustable sleeve, and an air flow channel is formed between the conical core and the wall of the cavity; and a driving component, which is used to drive the adjustable sleeve to move relative to the conical core to adjust the size of the air flow channel, and the size of the air flow channel is positively correlated with the flow size of the hot air flow, and inversely correlated with the temperature of the hot air flow.

[0014] Optionally, the adjustable sleeve is tapered, and a radial cross-sectional dimension of the adjustable sleeve gradually increases in a direction away from the outlet of the heat pipe.

[0015] Optionally, the driving assembly includes: a motor including an output gear; a gear bar fixedly connected to the adjustable sleeve, and an extension direction of the gear bar is parallel to the direction in which the adjustable sleeve moves relative to the cone core, wherein the gear bar is meshed with the output gear.

[0016] Optionally, the outlet of the heat exchanger and the inlet of the compressor are both connected to the atmosphere.

[0017] Optionally, the drying system further includes a drainage device connected to a drainage port of the heat exchanger for draining condensed water from the heat exchanger.

[0018] An embodiment of the present invention also provides a clothes drying device, comprising: a box; a drum, arranged in the box, for accommodating clothes to be dried; and also includes any of the above-mentioned drying systems, wherein the compressor, the vortex tube and the heat exchanger are all located in the box and outside the drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural schematic diagram of a drying system in an embodiment of the present invention;

[0020] Figure 2 is a structural schematic diagram of another drying system in an embodiment of the present invention;

[0021] Figure 3 is a structural schematic diagram of a flow regulating mechanism in an embodiment of the present invention;

[0022] 1- compressor; 11- compressor inlet; 12- compressor outlet; 2- vortex tube; 21- vortex tube inlet; 22- heat pipe; 221- heat pipe outlet; 23- cold pipe; 231- cold pipe outlet; 3- heat exchanger; 31- first inlet; 32- second inlet; 33- heat exchanger outlet; 4- heating device; 5- flow regulating mechanism; 51- adjustable sleeve; 511- wall of adjustable sleeve; 52- cone core; 521- outer surface of cone core; 53- driving assembly; 531- motor; 532- gear bar; 6- drainage device; 200- roller. DETAILED DESCRIPTION

[0023] At present, taking the washer-dryer as an example, there are two main ways to implement the drying system of the existing washer-dryer. The first is based on electric heating and water condensation. Specifically, electric heating is used to produce high-temperature and low-humidity air, which enters the drum to evaporate the moisture on the clothes, realizes the drying of the clothes, and is humidified and cooled. After that, the high-humidity and low-temperature air output by the drum enters the condenser, directly contacts with water for heat exchange, precipitates water vapor in the air, obtains low-temperature and low-humidity air, and realizes the circulation of the entire drying system through the fan. The second is based on a heat pump system, which transfers the heat of the refrigerant to the air through the heat exchange of the partition wall of the condenser (such as a fin heat exchanger) to obtain high-temperature and low-humidity air, which enters the drum to evaporate the moisture on the clothes, realizes the drying of the clothes, and is humidified and cooled. After that, the high-humidity and low-temperature air enters the evaporator (such as a fin heat exchanger), and through the dew point dehumidification method, the water vapor in the air precipitates water on the surface of the evaporator, thereby obtaining low-temperature and low-humidity air, and the circulation of the entire drying system is realized through the fan.

[0024] The first method mentioned above can achieve a faster drying speed, but the energy consumption is relatively high. Compared with the first method, the second method has a significant improvement in energy consumption, but the drying speed is relatively slow. In summary, the existing drying system cannot take into account both energy consumption and drying speed at the same time. In addition, the second method uses the phase change of the refrigerant to achieve air heating and condensation, which has the risk of refrigerant leakage.

[0025] To solve the above problems, in an embodiment of the present invention,

[0026] The compressed air is processed by a vortex tube to obtain hot air flow and cold air flow. The hot air flow is input into the drum to dry the clothes to be dried in the drum. The cold air flow is input into the heat exchanger to exchange heat with the high-temperature and high-humidity gas output from the drum. The vortex tube can obtain the hot air flow for drying clothes and the cold air flow for cooling the high-temperature and high-humidity gas output from the drum without power supply. It has low cost and low energy consumption. It can meet the drying speed requirements by controlling the flow rate of the compressed gas input into the vortex tube and the flow rate of the hot air flow output, so as to take into account both energy consumption and drying speed.

[0027] In addition, since there is no need to utilize the phase change of the refrigerant to achieve the heating and condensation of the air, the drying system provided by the embodiment of the present invention can also effectively avoid the problem of refrigerant leakage.

[0028] In order to make the above-mentioned purposes, features and beneficial effects of the embodiments of the present invention more obvious and understandable, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] The embodiment of the present invention provides a drying system for use in a clothes drying device to dry clothes. The clothes drying device may be a clothes dryer, a washer-dryer, or other device having a clothes drying function.

[0030] Combine the following Figure 1 A schematic diagram of a drying system in an embodiment of the present invention is provided to illustrate the specific structure of the drying system.

[0031] The drying system comprises: a compressor 1, a vortex tube 2 and a heat exchanger 3. The compressor 1 is used to compress the gas to obtain compressed gas.

[0032] The vortex tube 2 includes an inlet 21, a heat pipe 22 and a cold pipe 23. The inlet 21 of the vortex tube 2 is connected to the outlet 12 of the compressor 1. The vortex tube 2 is used to process the compressed gas to obtain a hot air flow and a cold air flow. The hot air flow is transmitted to the drum 200 of the clothes drying device through the outlet 221 of the heat pipe 22 to provide a hot air flow in the drum 200. The hot air flow in the drum 200 exchanges heat with the clothes to be dried in the drum 200, so that the moisture on the clothes evaporates into water vapor, thereby drying the clothes to be dried. The cold air flow is transmitted to the heat exchanger 3 through the outlet 231 of the cold pipe 23.

[0033] Specifically, the compressed gas can form a free vortex after entering the vortex tube 2 through the inlet 21. Due to the different angular velocities, friction is generated between the layers of the free vortex, and the friction causes energy to be transferred from the inside to the outside. The outer layer of the airflow is led out from the outlet 221 of the heat pipe 22 of the vortex tube 2 to form a hot air flow. The inner layer of the airflow reverses and flows back and is led out from the outlet 231 of the cold end 23 to produce a cold air flow.

[0034] The first inlet 31 of the heat exchanger 3 is connected to the outlet 231 of the cold pipe 23 for inputting the cold air flow. The second inlet 32 ​​of the heat exchanger 3 is connected to the drum 200 for inputting the high-heat and high-humidity gas output from the drum 200, wherein the cold air flow and the high-heat and high-humidity gas exchange heat in the heat exchanger 3. The heat exchanger 3 can cool and dehumidify the high-heat and high-humidity gas to obtain low-temperature and low-humidity gas.

[0035] The high-heat and high-humidity gas is obtained after the hot air flow exchanges heat with the object to be dried in the drum 200. It should be noted that the "high temperature", "high humidity", "low temperature" and "low humidity" in the embodiments of the present invention are all relative concepts, and the present invention does not limit the specific range of values. "High temperature" means that the temperature of one object is higher than the temperature of another object, "high humidity" means that the humidity of one object is higher than the humidity of another object, "low temperature" means that the temperature of one object is lower than the temperature of another object, and "low humidity" means that the humidity of one object is lower than the humidity of another object. For example, the temperature of the high-heat and high-humidity airflow is higher than the temperature of the hot airflow, and the humidity is greater than the humidity of the hot airflow. The temperature of the low-temperature and low-humidity gas is lower than that of the high-temperature and high-humidity gas, and the humidity is less than that of the high-temperature and high-humidity gas.

[0036] As can be seen from the above, the vortex tube 2 is used to process the compressed air to obtain hot air flow and cold air flow, the hot air flow is input into the drum 200 to dry the clothes to be dried in the drum 200, and the high temperature and high humidity gas in the drum 200 is output to the heat exchanger 3. The cold air flow is input into the heat exchanger 3 to exchange heat with the high temperature and high humidity gas. The vortex tube 2 can obtain the hot air flow for drying clothes and the cold air flow for cooling the high temperature and high humidity gas output from the drum 200 without power supply, with low cost and low energy consumption, and can meet the drying speed requirements by controlling the flow rate of the compressed gas input into the vortex tube 2 and the flow rate of the hot air flow output, so as to take into account both energy consumption and drying speed.

[0037] In addition, the hot air flow obtained through the vortex tube 2 is input into the drum 200, which helps to control the flow direction of the hot air flow, thereby helping to increase the drying speed.

[0038] In some embodiments, the outlet 33 of the heat exchanger 3 and the inlet 11 of the compressor 1 are both connected to the atmosphere. That is, after the cold air flow exchanges heat with the high-temperature and high-humidity gas in the heat exchanger 3, it is discharged into the atmosphere through the outlet 33 of the heat exchanger 3. At this time, the inlet 11 of the compressor 1 is connected to the atmosphere, and the air flow is sucked in from the atmosphere. Usually, the compressor 1 sucks air from the atmosphere and compresses the air, and the obtained compressed gas is a normal temperature and high-speed airflow. The compressor 1 continuously extracts air from the atmosphere in the environment to realize the airflow circulation of the entire drying system. The compressor 1 draws air from the atmosphere to ensure the stability of the airflow.

[0039] In other embodiments, the outlet 33 of the heat exchanger 3 is connected to the inlet 11 of the compressor 1 .

[0040] A filter device is provided between the outlet 33 of the heat exchanger 3 and the inlet 11 of the compressor 1, and the filter device is used to filter the airflow input into the inlet 11 of the compressor 1. The airflow output from the outlet 33 of the heat exchanger 3 can be filtered by the provided filter device to ensure the cleanliness of the airflow input into the inlet 11 of the compressor 1, and to prevent impurities such as lint and hair from clogging the compressor 1.

[0041] The filter device may be disposed at the outlet 33 of the heat exchanger 3, or at the inlet 11 of the compressor 1. The filter device may be any suitable filter component such as a filter screen or filter cotton.

[0042] Furthermore, a flow stabilizing device is provided between the filter device and the inlet 11 of the compressor 1, for stabilizing the airflow entering the compressor 1. By means of the provided flow stabilizing device, even if the airflow output from the outlet 33 of the heat exchanger 3 is unstable, a relatively stable airflow can be obtained after the airflow passes through the flow stabilizing device, thereby making the airflow entering the compressor 1 relatively stable, and then the vortex tube 2 can generate a relatively stable hot airflow to be input into the drum 200, so as to ensure the stability of the airflow circulation in the entire drying system.

[0043] The flow stabilizing device may be any suitable flow stabilizing component such as a grid, a rectifying plate, etc.

[0044] In some non-limiting embodiments, the drying system may further include: a heating device 4. The heating device 4 is disposed between the outlet 221 of the heat pipe 22 and the drum 200 to heat the hot air flow output from the outlet 221 of the heat pipe 22. The heating device 4 can electrically assist in heating the air flow to increase the air flow temperature, thereby accelerating the evaporation of water in the drum, and helping to achieve rapid drying.

[0045] In a specific implementation, the working state of the heating device 4 is configured according to the inlet temperature of the airflow, and the inlet temperature refers to the temperature of the airflow when it enters the drum 200. The working state includes: the switch state and the heating power in the on state. The actual temperature of the airflow entering the drum 200 can be detected. If the actual temperature is less than the inlet temperature, the heating device 4 is turned on, and the heating power of the heating device 4 is controlled so that the temperature of the airflow can reach the inlet temperature after the airflow is heated by the heating device 4. Among them, the actual temperature of the airflow entering the drum 200 can be detected by a temperature sensor, and the temperature sensor can be set in the channel between the heating device 4 and the drum 200, or at a suitable position of the drum 200. In this way, by cooperating with the heating device 4 and the vortex tube, the drying requirements under different drying modes can be adapted, so that the clothes drying equipment can achieve an optimal working condition and drying efficiency regardless of which drying mode it is in.

[0046] In some embodiments, the inlet temperature is configured according to the fabric type and / or drying mode of the clothing. That is, the inlet temperature corresponding to different fabric types may be different. For the same fabric type, the corresponding inlet temperature in different drying modes may be different. The inlet temperature corresponding to different drying modes may be different. For the same drying mode, the inlet temperature corresponding to different fabric types may be different. In this way, when determining the inlet temperature, the fabric type and the drying mode are combined, and when the drying requirements are met, it is possible to avoid excessive temperature damaging the fabric structure of the clothing.

[0047] In some implementations, the heating power and cooling capacity of the vortex tube 2 can be pre-configured at the factory and do not need to be adjusted during subsequent use. The heating power and cooling capacity will affect parameters such as the flow rate of the cold air flow, the flow rate of the hot air flow, and the temperature of the hot air flow. Specifically, the heating power and cooling capacity of the vortex tube 2 can be determined according to the overall requirements of the clothes drying equipment, in conjunction with the drying mode of the clothes drying equipment, and in combination with the working conditions under various drying modes, that is, the flow rate of the cold air flow, the flow rate of the hot air flow, and the temperature of the hot air flow. For example, the optimal heating power and cooling capacity under a specific working condition can be taken as the heating power and cooling capacity of the vortex tube 2. The specific working condition may be a working condition of a drying mode, or it may not be a working condition of a drying mode, but it is an overall relatively good working condition after considering various drying modes.

[0048] In other embodiments, the flow rate of the hot air flow output from the outlet 221 of the heat pipe 22 of the vortex tube 2 is adjustable to meet the heating power and cooling requirements of the clothes drying device in different drying modes, and to automatically adjust the flow rate of the hot air flow output from the outlet 221 of the heat pipe 22 according to the drying mode of the clothes drying device. Figure 2 and Figure 3 The drying system may further include a flow regulating mechanism 5. The flow regulating mechanism 5 is disposed at the outlet 221 of the heat pipe 22 and is used to regulate the flow of the hot air flow outputted from the outlet 221 of the heat pipe 22. Figure 2 is a schematic structural diagram of another drying system in an embodiment of the present invention, Figure 3 It is a structural schematic diagram of a flow regulating mechanism in an embodiment of the present invention.

[0049] In a specific implementation, the flow regulating mechanism 5 includes: an adjustable sleeve 51, a cone core 52 and a driving assembly 53. The adjustable sleeve 51 is movably mounted on the outlet 221 of the heat pipe 22. The cone core 52 is located in the cavity of the adjustable sleeve 51, and an airflow channel is formed between the cone core 52 and the wall of the cavity; the driving assembly 53 is used to drive the adjustable sleeve 51 to move relative to the cone core 52 to adjust the size of the airflow channel. The size of the airflow channel is positively correlated with the flow size of the hot air flow and inversely correlated with the temperature of the hot air flow. That is, the larger the flow of the hot air flow, the lower the temperature of the hot air flow, the smaller the flow of the cold air flow, and the lower the temperature of the cold air flow; accordingly, the smaller the flow of the hot air flow, the higher the temperature of the hot air flow, the larger the flow of the cold air flow, and the higher the temperature of the cold air flow.

[0050] In some embodiments, the adjustable sleeve 51 is conical, and the radial cross-sectional size of the adjustable sleeve 51 gradually increases in the direction away from the outlet 221 of the heat pipe 22. When the adjustable sleeve 51 moves relative to the cone core 52, the gap D between the wall 511 of the adjustable sleeve 51 and the outer surface 521 of the cone core 52 changes. When the adjustable sleeve 51 moves in the direction away from the cold pipe 23, the gap D between the wall 511 of the adjustable sleeve 51 and the outer surface 521 of the cone core 52 becomes smaller, and the air flow channel becomes smaller. At this time, the flow rate of the hot air flow output from the outlet 221 of the heat pipe 22 becomes smaller, and the temperature of the hot air flow increases. When the adjustable sleeve 51 moves in the direction close to the cold pipe 23, the gap D between the wall 511 of the adjustable sleeve 51 and the outer surface 521 of the cone core 52 becomes larger, and the air flow channel becomes larger. At this time, the flow rate of the hot air flow output from the outlet 221 of the heat pipe 22 becomes larger, and the temperature of the hot air flow decreases.

[0051] In some embodiments, the driving assembly 53 includes: a motor 531 and a gear bar 532. The motor 531 includes an output gear 5311. The gear bar 532 is fixedly connected to the adjustable sleeve 51, and the extension direction of the gear bar 532 is parallel to the direction in which the adjustable sleeve 51 moves relative to the cone core 52. The gear bar 532 is meshed with the output gear 5311 to convert the circular motion of the output gear 5311 of the motor 531 into a linear motion. When the motor 531 is turned on, the output gear 5311 rotates, and the adjustable sleeve 51 is driven to move through the meshing gear bar 532. The rotation direction of the output gear 5311 can be adjusted by controlling the forward or reverse rotation of the motor 531, and then the direction in which the adjustable sleeve 51 moves relative to the cone core 52 can be adjusted to automatically adjust the size of the airflow channel.

[0052] In some embodiments, the motor 531 includes an output shaft, and the output gear 5311 is sleeved on the output shaft and rotates along with the output shaft.

[0053] The forward or reverse rotation of the motor 531 and the distance that the adjustable sleeve 51 moves relative to the cone core 52 can be determined according to the fabric type or drying mode of the clothes to be dried. In this way, the hot air flow temperature suitable for the current fabric type or drying mode can be obtained to avoid damage to the clothes due to excessive temperature when drying the clothes.

[0054] In some embodiments, motor 531 may include a stepper motor.

[0055] In a specific implementation, the drying system further includes a drainage device 6 , which is connected to a drainage port of the heat exchanger 3 and is used to drain condensed water from the heat exchanger 3 .

[0056] The drainage device 6 may include a drainage pump. It is understandable that the drainage device 6 may also include matching components such as a drainage pipe.

[0057] In some embodiments, the drainage device 6 is located below the heat exchanger 3, so that the condensed water generated by the heat exchanger can fully utilize its own gravity when being discharged, thereby saving energy consumption.

[0058] In some embodiments, the heat exchanger 3 may include a condenser. For example, the heat exchanger 3 may be a partitioning heat exchanger.

[0059] An embodiment of the present invention further provides a clothes drying device, comprising: a housing, a drum 200 and a drying system. The drum 200 is arranged in the housing for accommodating clothes to be dried. The drying system can adopt the drying system provided by any of the above embodiments. Among them, the compressor 1, the vortex tube 2 and the heat exchanger 3 are all located in the housing and outside the drum 200. For the specific structure of the drying system, please refer to the description in the above embodiments, which will not be repeated here.

[0060] The positions of the compressor 1, the vortex tube 2, the heat exchanger 3, etc. in the box can be arranged according to the actual space conditions in the box.

[0061] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the present disclosure, even when only a single embodiment is described with respect to specific features. The feature examples provided in the present disclosure are intended to be illustrative rather than limiting, unless otherwise stated. In specific implementations, the technical features of one or more dependent claims may be combined with the technical features of the independent claims, based on actual needs and where technically feasible, and the technical features from the corresponding independent claims may be combined in any appropriate manner rather than just by the specific combinations listed in the claims.

[0062] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A drying system, used for clothes drying equipment, characterized in that: include: A compressor (1) is used to compress gas to obtain compressed gas; A vortex tube (2), comprising an inlet (21), a heat pipe (22) and a cold pipe (23), wherein the inlet (21) of the vortex tube (2) is connected to the outlet (12) of the compressor (1), and the vortex tube (2) is used to process the compressed gas to obtain a hot air flow and a cold air flow, wherein the hot air flow is transmitted to the drum (200) of the clothes drying device through the outlet (221) of the heat pipe (22), and the cold air flow is transmitted to the heat exchanger (3) through the outlet (231) of the cold pipe (23); The heat exchanger (3) has a first inlet (31) connected to the outlet (231) of the cold pipe (23) for inputting the cold air flow; a second inlet (32) of the heat exchanger (3) connected to the drum (200) for inputting the high-heat and high-humidity gas output from the drum (200), wherein the cold air flow and the high-heat and high-humidity gas realize heat exchange in the heat exchanger (3).

2. The drying system according to claim 1, characterized in that: The outlet (33) of the heat exchanger (3) is in communication with the inlet (11) of the compressor (1).

3. The drying system according to claim 2, characterized in that: A filtering device is provided between the outlet (33) of the heat exchanger (3) and the inlet (11) of the compressor (1), for filtering the airflow input into the inlet (11) of the compressor (1).

4. The drying system according to claim 3, characterized in that: A flow stabilizing device is provided between the filter device and the inlet (11) of the compressor (1), for stabilizing the airflow entering the compressor (1).

5. The drying system according to claim 1, characterized in that: Also includes: The heating device (4) is arranged between the outlet (221) of the heat pipe (22) and the drum (200) to heat the hot air flow output from the outlet (221) of the heat pipe (22).

6. The drying system according to claim 5, characterized in that: The working state of the heating device (4) is configured according to the inlet temperature of the airflow, and the working state includes: the heating power in the switch state and the open state; the inlet temperature refers to the temperature of the airflow when it enters the drum (200).

7. The drying system according to claim 6, characterized in that: The drum inlet temperature is configured according to the fabric type and / or drying mode of the clothes.

8. The drying system according to claim 1, characterized in that: It also includes a flow regulating mechanism (5), which is arranged at the outlet (221) of the heat pipe (22) and is used to regulate the flow of the hot air flow output from the outlet (221) of the heat pipe (22), and the flow regulating mechanism (5) includes: An adjustable sleeve (51) movably sleeved on the outlet (221) of the heat pipe (22); A cone core (52) is located in the cavity of the adjustable sleeve (51), and an air flow channel is formed between the cone core (52) and the wall surface of the cavity; A driving assembly (53) is used to drive the adjustable sleeve (51) to move relative to the cone core (52) to adjust the size of the airflow channel, wherein the size of the airflow channel is positively correlated with the flow rate of the hot air flow and negatively correlated with the temperature of the hot air flow.

9. The drying system according to claim 8, characterized in that: The adjustable sleeve (51) is tapered, and the radial cross-sectional dimension of the adjustable sleeve (51) gradually increases in a direction away from the outlet (221) of the heat pipe (22).

10. The drying system according to claim 8, characterized in that: The driving assembly (53) comprises: a motor (531) including an output gear (5311); A gear bar (532) is fixedly connected to the adjustable sleeve (51), and an extension direction of the gear bar (532) is parallel to a direction in which the adjustable sleeve (51) moves relative to the cone core (52), wherein the gear bar (532) is meshed with the output gear (5311).

11. The drying system according to claim 1, characterized in that: The outlet (33) of the heat exchanger (3) and the inlet (11) of the compressor (1) are both connected to the atmosphere.

12. The drying system according to claim 1, characterized in that: It also includes a drainage device (6) which is connected to the drainage port of the heat exchanger (3) and is used to drain condensed water from the heat exchanger (3).

13. A clothes drying device, comprising: Box; A drum (200), arranged in the box, for accommodating clothes to be dried; It is characterized in that it also includes a drying system as described in any one of claims 1 to 12, wherein the compressor (1), the vortex tube (2) and the heat exchanger (3) are all located in the box body and outside the drum (200).

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