Clothes dryer and drying system and method thereof

Abstract

The application discloses a clothes dryer and a drying system and method thereof, wherein the drying method of the clothes dryer comprises the following steps: acquiring the weight of a load; acquiring the type of the load in combination with the weight of the load; and determining a corresponding drying mode in combination with a first preset corresponding relationship according to the weight and type of the load, so that the matching drying mode is automatically selected according to the weight and type of the load, the clothes dryer is more intelligent and automatic, and the user satisfaction is improved.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more particularly to a clothes dryer and its drying system and method. Background Technology

[0002] With social development and the gradual improvement of people's living standards, people are paying more and more attention to clothing care. In humid and cold regions, clothes dryers are receiving increasing attention.

[0003] Currently, before using a clothes dryer, users often need to manually select a drying mode based on the type of clothing, or directly choose a recommended drying mode. The problem with this is that manually selecting a drying mode requires users to have a clear understanding of the type of clothing. If a recommended drying mode is used directly, the drying temperature and humidity may not match some clothes, leading to problems such as wear and tear, over-drying, and wrinkles. Furthermore, current drying modes are relatively limited and cannot meet the diverse needs of different types of clothing, affecting user experience and resulting in low user satisfaction. Summary of the Invention

[0004] This invention provides a clothes dryer and its drying system and method, which enables the selection of a matching drying mode based on the weight and type of the load, thereby improving user satisfaction.

[0005] To achieve the above objectives, a first aspect of the present invention provides a drying method for a clothes dryer, comprising the following steps:

[0006] Get the weight of the load;

[0007] The type of load is determined by combining the weight of the load;

[0008] Based on the weight and type of the load, a corresponding drying mode is determined in conjunction with a first preset correspondence, wherein the first preset correspondence is the correspondence between the weight and type of the load and the drying mode.

[0009] According to one embodiment of the present invention, obtaining the weight of the load includes:

[0010] Obtain the pressure difference across the evaporator or condenser;

[0011] Based on the pressure difference, the current airflow of the clothes dryer is determined in conjunction with the second preset correspondence.

[0012] The weight of the load is determined based on the current air volume.

[0013] According to one embodiment of the present invention, determining the weight of the load based on the current airflow includes:

[0014] The resistance of the load to air is obtained based on the current air volume and the air volume delivered by the fan in the clothes dryer;

[0015] The weight of the load is determined based on the resistance of the load to air.

[0016] According to one embodiment of the present invention, obtaining the type of load by combining the weight of the load includes:

[0017] Obtain the moisture content at the air inlet of the clothes drum or evaporator; obtain the moisture content at the air outlet of the clothes drum or evaporator;

[0018] The difference between the moisture content at the air inlet and the moisture content at the air outlet is obtained;

[0019] The type of load is determined based on the difference in moisture content and the weight of the load.

[0020] According to one embodiment of the present invention, obtaining the moisture content at the air inlet of the garment drum or evaporator includes:

[0021] Obtain the temperature and humidity at the air inlet of the clothes drum or evaporator; obtain the moisture content at the air inlet based on the temperature and humidity at the air inlet;

[0022] The moisture content at the air outlet of the garment drum or evaporator includes:

[0023] Obtain the temperature and humidity at the air outlet of the garment drum or evaporator; obtain the moisture content at the air outlet based on the temperature and humidity at the air outlet.

[0024] According to one embodiment of the present invention, obtaining the moisture content at the air inlet based on the temperature and humidity at the air inlet includes:

[0025] The saturated water vapor partial pressure at the air inlet is determined based on the temperature at the air inlet.

[0026] The actual partial pressure of water vapor at the air inlet is determined based on the saturated water vapor partial pressure at the air inlet and the humidity at the air inlet.

[0027] The moisture content at the air inlet is determined based on the actual partial pressure of water vapor at the air inlet.

[0028] The step of obtaining the moisture content at the air outlet based on the temperature and humidity at the air outlet includes:

[0029] The saturated water vapor partial pressure at the air outlet is determined based on the temperature at the air outlet.

[0030] The actual partial pressure of water vapor at the air outlet is determined based on the saturated water vapor partial pressure at the air outlet and the humidity at the air outlet.

[0031] The moisture content at the air outlet is determined based on the actual partial pressure of water vapor at the air outlet.

[0032] To achieve the above objectives, a second aspect of the present invention provides a drying system for a clothes dryer, comprising: a clothes drum and a heat pump assembly. The heat pump assembly includes an evaporator, a condenser, a filter, a compressor, an electronic expansion valve, a fan, and an air duct. The air duct includes a first air duct section and a second air duct section. The air outlet of the condenser is connected to the air inlet of the clothes drum through the first air duct section, and the air inlet of the evaporator is connected to the air outlet of the clothes drum through the second air duct section. The fan is located in the first air duct section; the filter is located in the second air duct section; the liquid inlet of the condenser is connected to the liquid outlet of the evaporator through the compressor; and the liquid outlet of the condenser is connected to the liquid inlet of the evaporator through the electronic expansion valve.

[0033] Also includes:

[0034] The controller is used to acquire the weight and type of the load; and to determine the corresponding drying mode based on the weight and type of the load and a first preset correspondence, wherein the first preset correspondence is the correspondence between the weight and type of the load and the drying mode.

[0035] According to one embodiment of the present invention, the drying system of the clothes dryer further includes: a first humidity sensor and a second humidity sensor, the first humidity sensor and the second humidity sensor being respectively connected to the controller, the first humidity sensor being located at the connection between the first air duct section and the clothes drum; the second humidity sensor being located at the connection between the second air duct section and the clothes drum; or, the first humidity sensor being located at the air outlet of the evaporator, and the second humidity sensor being located at the air inlet of the evaporator.

[0036] According to one embodiment of the present invention, the drying system of the clothes dryer further includes: a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is located at the air inlet of the evaporator and the second pressure sensor is located at the air outlet of the evaporator; or, the first pressure sensor is located at the air inlet of the condenser and the second pressure sensor is located at the air outlet of the condenser.

[0037] To achieve the above objectives, a third aspect of the present invention provides a clothes dryer, including the drying system of the clothes dryer as described above.

[0038] According to embodiments of the present invention, a clothes dryer and its drying system and method are provided. The drying method of the clothes dryer includes the following steps: obtaining the weight of the load; obtaining the type of the load based on the weight of the load; and determining a corresponding drying mode based on the weight and type of the load and a first preset correspondence relationship. The first preset correspondence relationship is the correspondence between the weight and type of the load and the drying mode, thereby realizing the automatic selection of a matching drying mode based on the weight and type of the load, making the clothes dryer more intelligent and automated, and improving user satisfaction. Attached Figure Description

[0039] Figure 1 This is a flowchart of the drying method of the clothes dryer proposed in the embodiments of the present invention;

[0040] Figure 2 This is a flowchart of a clothes dryer drying method according to an embodiment of the present invention;

[0041] Figure 3 This is a flowchart of a clothes dryer drying method according to another embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the drying system of the clothes dryer proposed in an embodiment of the present invention;

[0043] Figure 5 This is a block diagram of a clothes dryer proposed in an embodiment of the present invention. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0045] Figure 1 This is a flowchart of the drying method for a clothes dryer proposed in an embodiment of the present invention. Figure 1 As shown, the drying method of this clothes dryer includes the following steps:

[0046] S101, obtain the weight of the load;

[0047] The load can be the clothes that need to be dried, such as clothes, sheets, etc. The weight of the load is the weight of the clothes that need to be dried, which can be understood as the mass of the clothes with moisture.

[0048] According to one embodiment of the present invention, such as Figure 2 As shown, step S101, obtaining the weight of the load, includes:

[0049] S1011, obtain the pressure difference before and after the evaporator or condenser;

[0050] S1012, Based on the pressure difference value and in conjunction with the second preset correspondence, determine the current air volume of the clothes dryer;

[0051] It should be noted that after obtaining the pressure difference before and after the evaporator or condenser, the current wind speed can be obtained based on the pressure difference. The relationship between the current wind speed and the pressure difference is P = 0.5ρv 2 Where P is the pressure difference, ρ is the air density, and v is the wind speed. After obtaining the current wind speed, the air volume (volume flow rate) per unit time can be obtained by combining this with the pipe diameter. It's understandable that before the clothes dryer goes into production, different pressure differences can be given during the R&D phase, and the corresponding air volume can be calculated and pre-stored in the clothes dryer in the form of a table or curve. In practical applications, after obtaining the pressure difference before and after the evaporator or condenser, the current air volume can be obtained according to the pre-stored table or curve (a second preset correspondence).

[0052] S1013, determine the weight of the load based on the current air volume.

[0053] According to an embodiment of the present invention, step S1013, determining the weight of the load based on the current airflow, includes:

[0054] The resistance of the load to air is obtained based on the current air volume and the air volume delivered by the fan in the clothes dryer;

[0055] The weight of the load is determined based on the resistance of the load to air.

[0056] It is understandable that the same load (such as the same bed sheet) with different weights will have different air resistance; generally, the heavier the load, the greater the air resistance. After obtaining the current airflow and the delivered airflow, the difference in airflow can be used to determine the load's air resistance. Furthermore, the lower the current airflow, the greater the load's air resistance. Therefore, a relationship between the current airflow and the load weight can be established through the load's air resistance, obtaining a third preset correspondence. It should be noted that before the clothes dryer is put into production, during the R&D phase, given the same load with different weights, the current airflow can be measured. Finally, the correspondence between the current airflow and the load weight can be obtained and pre-stored in the clothes dryer. In actual use, after obtaining the current airflow in step S1012, the load weight can be determined according to the third preset correspondence. To save computational costs, in actual use, the load weight can also be understood as determining the load's weight range.

[0057] According to a specific embodiment of the present invention, a speed setting can be configured. When the clothes drying process begins, the clothes drum rotates, the fan starts, and rotates at an initially set speed. The pressure difference is then measured to determine the current airflow. Once the current airflow is determined, the weight range of the load can be determined based on the speed setting. For example, if the current airflow is greater than the first airflow, the load weight is less than 2 kg; if the current airflow is greater than the second airflow but less than the first airflow, the load weight is greater than 2 kg but less than 6 kg; if the current airflow is greater than the third airflow but less than the second airflow, the load weight is greater than 6 kg but less than 8 kg; and if the current airflow is less than the third airflow, the load weight is greater than 8 kg.

[0058] S102, determine the type of load based on the weight of the load;

[0059] The type of load refers to the material of the clothing, such as cotton, linen, or silk.

[0060] According to one embodiment of the present invention, such as Figure 3 As shown, step S102, which involves determining the type of load based on its weight, includes:

[0061] S1021, Obtain the moisture content at the air inlet of the clothes drum or evaporator;

[0062] S1022, Obtain the moisture content at the air outlet of the clothes drum or evaporator;

[0063] S1023, obtain the difference between the moisture content at the air inlet and the moisture content at the air outlet;

[0064] S1024, Based on the moisture content difference and the weight of the load, determine the type of the load.

[0065] It's understandable that for the same weight but different types of loads, the moisture content of the air after passing through the garment drum will differ. For example, silk sheets and cotton / linen sheets of the same weight have different moisture contents; the silk sheet has less moisture than the cotton / linen sheet. Consequently, the moisture content of the air passing through the garment drum containing the silk sheet is lower than that passing through the one containing the cotton / linen sheet. Therefore, the type of load can be determined by observing the changes in moisture content at the air inlet and outlet of the garment drum, combined with the weight of the load.

[0066] It should be noted that before the clothes dryer is put into production, the difference in moisture content can be tested in the laboratory by giving different types of loads of the same weight. Finally, the correlation between moisture content and load type can be obtained. Thus, in actual use, after obtaining the difference in moisture content, the type of load can be determined based on the difference in moisture content and the weight of the load.

[0067] For example, when the load weight is 2 kg and the moisture content difference is 30%, the load is silk; when the load weight is 2 kg and the moisture content difference is 50%, the load is cotton and linen.

[0068] S103. Determine the corresponding drying mode according to the weight and type of the load in combination with the first preset correspondence, where the first preset correspondence is the correspondence between the weight and type of the load and the drying mode.

[0069] After steps S102 and S103, the weight and type of the load are obtained, so the corresponding drying mode can be determined in combination with the first preset correspondence. Among different drying modes, the drying time and drying temperature are different.

[0070] For example, for a 2-kg load of silk type, the drying time is t1 and the drying temperature is T1. If it is a 2-kg load of cotton and linen type, the drying time is t2 and the drying temperature is T2, where t1 < t2 and T1 < T2. For a 4-kg load of silk type, the drying time is t3 and the drying temperature is T3, t3 > t1 and T3 > T1. For a 4-kg load of cotton and linen type, the drying time is t4 and the drying temperature is T4, t4 > t2 and T4 > T2. Further, according to the weight and type of different loads, the corresponding drying mode is determined. It should be noted that before the clothes dryer is officially put into production, different weights and types of loads can be set in the R & D stage, and different drying times and drying temperatures can be matched to judge whether the drying is completed and observe the drying effect. That is, the drying modes corresponding to different weights and types of loads are pre-stored in the clothes dryer. When actually used, after obtaining the weight and type of the load, the corresponding drying mode can be automatically matched. Thus, it is possible to avoid damage to the clothes caused by artificially selecting the drying mode, or selecting the drying mode according to the recommendation, as well as the single drying mode.

[0071] According to an embodiment of the present invention, the obtaining the moisture content at the air inlet of the clothes tub or the evaporator in step S1021 includes:

[0072] Obtain the temperature and humidity at the air inlet of the clothes tub or the evaporator; obtain the moisture content at the air inlet according to the temperature and humidity at the air inlet.

[0073] According to an embodiment of the present invention, the obtaining the moisture content at the air inlet according to the temperature and humidity at the air inlet includes:

[0074] Determine the saturated water vapor partial pressure at the air inlet according to the temperature at the air inlet;

[0075] The actual partial pressure of water vapor at the air inlet is determined based on the saturated water vapor partial pressure at the air inlet and the humidity at the air inlet.

[0076] The moisture content at the air inlet is determined based on the actual partial pressure of water vapor at the air inlet.

[0077] It should be noted that the saturated water vapor partial pressure P is determined based on temperature T. ws The formula is as follows:

[0078] When the temperature T is between -100℃ and 0℃ Among them, C1 = -5.6745359E+03; C2 = -6.3925247E+00; C3 = -9.6778430E-03; C4 = 6.2215701E-07; C5 = 2.0747825E-09; C6 = -9.4840240E-13; C7 = 4.1635019E+00.

[0079] When the temperature T is between 0℃ and 200℃ Where, C8 = -5.8002206E+03; C9 = 1.3914993E+00; C 10 =-4.8640239E-02; C 11 =4.1764768E-05; C 12 =-1.4452093E-08; C 13 =6.5459673E+00.

[0080] When the saturated water vapor partial pressure P is obtained ws Then, based on the saturated water vapor partial pressure P ws The formula for calculating the actual partial pressure of water vapor P using humidity Φ (in %) w (Unit: Pa). The formula is as follows: P w =100*Φ*P ws .

[0081] When the actual partial pressure of water vapor P is calculated w Then, based on the actual partial pressure P of water vapor w The air humidity W (Kg / Kg dry air) is obtained by formulating the relationship between measured atmospheric pressure p and air humidity W.

[0082] The specific formula is as follows:

[0083] According to an embodiment of the present invention, step S1022, obtaining the moisture content at the air outlet of the clothes drum or evaporator, includes:

[0084] Obtain the temperature and humidity at the air outlet of the garment drum or evaporator; obtain the moisture content at the air outlet based on the temperature and humidity at the air outlet.

[0085] According to one embodiment of the present invention, obtaining the moisture content at the air outlet based on the temperature and humidity at the air outlet includes:

[0086] The saturated water vapor partial pressure at the air outlet is determined based on the temperature at the air outlet.

[0087] The actual partial pressure of water vapor at the air outlet is determined based on the saturated water vapor partial pressure at the air outlet and the humidity at the air outlet.

[0088] The moisture content at the air outlet is determined based on the actual partial pressure of water vapor at the air outlet.

[0089] It is understandable that the calculation process for the moisture content at the air outlet is the same as that at the air inlet, and will not be repeated here.

[0090] Based on this, after obtaining the inlet temperature T1, the saturated water vapor partial pressure P at the inlet can be determined according to the inlet temperature T1. ws1 Next, based on the partial pressure of saturated water vapor P at the air inlet... ws1 The actual partial pressure of water vapor at the air inlet is obtained from the air inlet humidity Φ1. w1 Finally, the inlet air moisture content W1 is obtained. Similarly, after obtaining the outlet air temperature T2, the outlet saturated water vapor partial pressure P can be determined based on the outlet air temperature T2. ws2 Next, based on the partial pressure of saturated water vapor P at the air outlet... ws2 The actual partial pressure of water vapor at the air outlet is obtained from the outlet humidity Φ2. w2 Finally, the humidity content W2 at the air outlet is obtained.

[0091] After determining the inlet moisture content W1 and the outlet moisture content W2, the moisture content difference can be calculated based on these two values. Then, based on this moisture content difference and the weight of the load, the type of load is determined. Finally, the appropriate drying mode is matched based on the load's weight and type. This allows for the selection of a suitable drying mode based on the load's weight and type, improving user satisfaction.

[0092] Figure 4 This is a schematic diagram of the drying system of the clothes dryer proposed in an embodiment of the present invention. Figure 4As shown, the drying system 100 of the clothes dryer includes: a clothes drum 1 and a heat pump assembly. The heat pump assembly includes an evaporator 5, a condenser 4, a filter 6, a compressor 8, an electronic expansion valve 7, a fan 2, and an air duct. The air duct includes a first air duct section 01 and a second air duct section 02. The air outlet of the condenser 4 is connected to the air inlet of the clothes drum 1 through the first air duct section 01, and the air inlet of the evaporator 5 is connected to the air outlet of the clothes drum 1 through the second air duct section 02. The fan 2 is located in the first air duct section 01; the filter 6 is located in the second air duct section 02; the liquid inlet of the condenser 4 is connected to the liquid outlet of the evaporator 5 through the compressor 8; and the liquid outlet of the condenser 4 is connected to the liquid inlet of the evaporator 5 through the electronic expansion valve 7.

[0093] Also includes:

[0094] A controller (not shown in the figure) is used to acquire the weight and type of the load; and to determine the corresponding drying mode based on the weight and type of the load and a first preset correspondence, wherein the first preset correspondence is the correspondence between the weight and type of the load and the drying mode.

[0095] Understandably, the air circulation is as follows: After being heated by the condenser 4, the air enters the clothes drum 1 through the fan 2, where it exchanges heat fully with the clothes inside. After lint is removed by the filter 6, the air passes through the evaporator 5 for cooling and dehumidification before returning to the condenser 4, completing one cycle. On the refrigerant side: The high-temperature refrigerant discharged from the compressor 8 releases heat through the condenser 4 and enters the evaporator 5 through the electronic expansion valve 7. After absorbing heat in the evaporator 5, it returns to the compressor 8.

[0096] Based on this, the controller can obtain the weight and type of the load, and determine the corresponding drying mode according to the weight and type of the load and the first preset correspondence. This allows for automatic matching of the appropriate drying mode, thus avoiding manual selection of the drying mode, selection based on recommendations, and the damage to clothes caused by a single drying mode. The working principle has been described in the method section; please refer to that section for details, which will not be repeated here.

[0097] According to one embodiment of the present invention, the drying system 100 of the clothes dryer further includes: a first humidity sensor 10 and a second humidity sensor 9, the first humidity sensor 10 and the second humidity sensor 9 being respectively connected to the controller, the first humidity sensor 10 being located at the connection between the first air duct section 01 and the clothes drum 1; the second humidity sensor 9 being located at the connection between the second air duct section 02 and the clothes drum 1; or, the first humidity sensor 10 being located at the air outlet of the evaporator 5, and the second humidity sensor 9 being located at the air inlet of the evaporator 5.

[0098] Specifically, the first humidity sensor 10 detects the temperature and humidity at the air inlet of the clothes drum 1, and the second humidity sensor 9 detects the temperature and humidity at the air outlet of the clothes drum 1. Alternatively, the first humidity sensor 10 detects the temperature and humidity at the air outlet of the evaporator 5, and the second humidity sensor 9 detects the temperature and humidity at the air inlet of the evaporator 5. Furthermore, the controller calculates the moisture content based on the temperature and humidity before and after the clothes drum 1, or based on the temperature and humidity before and after the evaporator 5, to determine the type of load.

[0099] According to one embodiment of the present invention, the drying system 100 of the clothes dryer further includes: a first pressure sensor 11 and a second pressure sensor 12, wherein the first pressure sensor 11 is located at the air inlet of the evaporator 5 and the second pressure sensor 12 is located at the air outlet of the evaporator 5; or, the first pressure sensor 11 is located at the air inlet of the condenser 4 and the second pressure sensor 12 is located at the air outlet of the condenser 4.

[0100] Specifically, the first pressure sensor 11 is used to detect the pressure at the air inlet of the evaporator 5, and the second pressure sensor 12 is used to detect the pressure at the air outlet of the evaporator 5; alternatively, the first pressure sensor 11 is used to detect the pressure at the air inlet of the condenser 4, and the second pressure sensor 12 is used to detect the pressure at the air outlet of the condenser 4. The controller can then determine the current airflow based on the pressure difference, and thus determine the load weight based on the current airflow.

[0101] It should be noted that, in order to avoid arranging too many sensors at the air inlet and outlet of the evaporator 5, preferably, the humidity sensor can be arranged at the air inlet and outlet of the clothes drum 1, and the pressure sensor can be arranged at the air inlet and outlet of the evaporator 5, or the humidity sensor can be arranged at the air inlet and outlet of the evaporator 5, and the pressure sensor can be arranged at the air inlet and outlet of the condenser 4. Other arrangements commonly used in the art are also possible, and the present invention does not impose specific limitations on them.

[0102] In summary, the drying system of the clothes dryer proposed in this embodiment of the invention determines the load weight through a pressure sensor, determines the load type through temperature and humidity, and finally intelligently and automatically matches the drying mode. It has a simple structure, low cost, and is economical and effective, which can improve the user experience.

[0103] Figure 5 This is a block diagram of a clothes dryer according to an embodiment of the present invention. Figure 5 As shown, the clothes dryer 200 includes the drying system 100 of the clothes dryer as described above.

[0104] In summary, the clothes dryer and its drying system and method proposed in the embodiments of the present invention include the following steps: obtaining the weight of the load; obtaining the type of the load based on the weight of the load; and determining the corresponding drying mode based on the weight and type of the load and a first preset correspondence, wherein the first preset correspondence is the correspondence between the weight and type of the load and the drying mode, thereby realizing the automatic selection of a matching drying mode based on the weight and type of the load, making the clothes dryer more intelligent and automated, and improving user satisfaction.

[0105] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A drying method for a clothes dryer, characterized in that, Includes the following steps: Get the weight of the load; The material type of the load is determined by combining the weight of the load; including: obtaining the moisture content at the air inlet of the clothes drum or evaporator; obtaining the moisture content at the air outlet of the clothes drum or evaporator; obtaining the difference between the moisture content at the air inlet and the moisture content at the air outlet; and determining the material type of the load based on the moisture content difference and the weight of the load. Based on the weight and type of the load, a corresponding drying mode is determined in conjunction with a first preset correspondence, wherein the first preset correspondence is the correspondence between the weight and type of the load and the drying mode.

2. The drying method of the clothes dryer according to claim 1, characterized in that, The weight of the acquired load includes: Obtain the pressure difference across the evaporator or condenser; Based on the pressure difference, the current airflow of the clothes dryer is determined in conjunction with the second preset correspondence. The weight of the load is determined based on the current air volume.

3. The drying method of the clothes dryer according to claim 2, characterized in that, Determining the weight of the load based on the current airflow includes: The resistance of the load to air is obtained based on the current air volume and the air volume delivered by the fan in the clothes dryer; The weight of the load is determined based on the resistance of the load to air.

4. The drying method of the clothes dryer according to claim 1, characterized in that, The method of obtaining the moisture content at the air inlet of the clothing drum or evaporator includes: Obtain the temperature and humidity at the air inlet of the clothes drum or evaporator; obtain the moisture content at the air inlet based on the temperature and humidity at the air inlet; The moisture content at the air outlet of the garment drum or evaporator includes: Obtain the temperature and humidity at the air outlet of the garment drum or evaporator; obtain the moisture content at the air outlet based on the temperature and humidity at the air outlet.

5. The drying method of the clothes dryer according to claim 4, characterized in that, The step of obtaining the moisture content at the air inlet based on the temperature and humidity at the air inlet includes: The saturated water vapor partial pressure at the air inlet is determined based on the temperature at the air inlet. The actual partial pressure of water vapor at the air inlet is determined based on the saturated water vapor partial pressure at the air inlet and the humidity at the air inlet. The moisture content at the air inlet is determined based on the actual partial pressure of water vapor at the air inlet. The step of obtaining the moisture content at the air outlet based on the temperature and humidity at the air outlet includes: The saturated water vapor partial pressure at the air outlet is determined based on the temperature at the air outlet. The actual partial pressure of water vapor at the air outlet is determined based on the saturated water vapor partial pressure at the air outlet and the humidity at the air outlet. The moisture content at the air outlet is determined based on the actual partial pressure of water vapor at the air outlet.

6. A drying system for a clothes dryer, controlled by the drying method of a clothes dryer as described in any one of claims 1-5, characterized in that, include: The garment drum and heat pump assembly include an evaporator, a condenser, a filter, a compressor, an electronic expansion valve, a fan, and an air duct. The air duct comprises a first section and a second section. The condenser's outlet is connected to the garment drum's inlet via the first section, and the evaporator's inlet is connected to the garment drum's outlet via the second section. The fan is located in the first section; the filter is located in the second section; the condenser's liquid inlet is connected to the evaporator's liquid outlet via the compressor; and the condenser's liquid outlet is connected to the evaporator's liquid inlet via the electronic expansion valve. Also includes: The controller is used to acquire the weight and type of the load; and to determine the corresponding drying mode based on the weight and type of the load and a first preset correspondence, wherein the first preset correspondence is the correspondence between the weight and type of the load and the drying mode.

7. The drying system of the clothes dryer according to claim 6, characterized in that, Also includes: A first humidity sensor and a second humidity sensor are respectively connected to the controller. The first humidity sensor is located at the connection between the first air duct section and the clothes drum body; the second humidity sensor is located at the connection between the second air duct section and the clothes drum body; or, the first humidity sensor is located at the air outlet of the evaporator and the second humidity sensor is located at the air inlet of the evaporator.

8. The drying system of the clothes dryer according to claim 6, characterized in that, Also includes: A first pressure sensor and a second pressure sensor, wherein the first pressure sensor is located at the air inlet of the evaporator and the second pressure sensor is located at the air outlet of the evaporator; or, the first pressure sensor is located at the air inlet of the condenser and the second pressure sensor is located at the air outlet of the condenser.

9. A clothes dryer, characterized in that, The drying system includes the clothes dryer as described in any one of claims 6-8.

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