Clothes dryer control method and clothes dryer

Abstract

The invention relates to the technical field of clothes care, in particular to a control method of a clothes dryer and the clothes dryer. The invention aims to solve the problems that heat in the operation process of a heat pump system can not be discharged in time, a compressor is frequently shut down due to over-temperature after continuously working for a period of time, the compressor can be restarted only after the exhaust temperature of the compressor is reduced to be below the early warning temperature, and the clothes drying rate is seriously influenced. To this end, the clothes dryer of the present application comprises: a heat pump system comprising a heat pump evaporator; the water cooling system comprises a water cooler, and the water cooler is arranged on the air inlet side of the heat pump evaporator; the control method comprises the steps that the water-cooling air inlet temperature of the air inlet side of the water cooler is obtained; and under the condition that the water-cooling air inlet temperature is larger than or equal to the first temperature threshold value and the duration is larger than or equal to the duration threshold value, the water cooler is controlled to refrigerate, so that air flowing through the water cooler is pre-cooled. The shutdown frequency of the compressor is reduced, and the clothes drying speed of the clothes dryer is increased.

Description

Technical Field

[0001] This application relates to the field of clothing care technology, specifically to a control method for a clothes dryer and a clothes dryer. Background Technology

[0002] Heat pump dryers are household cleaning appliances that use heat pump technology to evaporate and dry the moisture in clothes quickly. They can dry clothes relatively quickly, making the drying process no longer affected by the weather, and are widely used by both home and commercial users.

[0003] In related technologies, the heat pump system of a heat pump dryer includes a refrigerant circulation loop and a compressor, a heat pump condenser, and a heat pump evaporator installed on the refrigerant circulation loop. The compressor drives the refrigerant to circulate along the refrigerant circulation loop. The refrigerant exchanges heat with the outside air in the heat pump condenser and heat pump evaporator, heating / cooling the air flowing through the heat pump condenser / heat pump evaporator to obtain a dry hot airflow. Finally, the dry hot airflow is sent into the drum to dry the clothes.

[0004] However, during operation, heat pump systems may not be able to dissipate heat in time. After working continuously for a period of time, the compressor may frequently shut down due to overheating and can only be restarted after the compressor's exhaust temperature drops below the warning temperature, which seriously affects the drying rate.

[0005] Accordingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0006] In order to solve at least one of the above-mentioned problems in the prior art, namely, the heat pump system may not be able to dissipate heat in time during operation, and the compressor will frequently shut down due to overheating after working continuously for a period of time, and can only be restarted after the compressor exhaust temperature drops below the warning temperature, which seriously affects the drying rate.

[0007] In a first aspect, this application provides a control method for a clothes dryer, the clothes dryer comprising: a heat pump system including a heat pump evaporator; and a water cooling system including a water cooler disposed on the air inlet side of the heat pump evaporator; the control method comprising: acquiring the water-cooled air inlet temperature on the air inlet side of the water cooler; and, when the water-cooled air inlet temperature is greater than or equal to a first temperature threshold and the duration is greater than or equal to a duration threshold, controlling the water cooler to cool the air flowing through the water cooler.

[0008] In some embodiments, the water cooler includes: a water flow channel connected to an external water source; and a water-cooled valve disposed on the water flow channel. The control method further includes: acquiring the water-cooled outlet air temperature on the outlet side of the water cooler; and controlling the opening degree of the water-cooled valve according to the water-cooled outlet air temperature.

[0009] In some embodiments, the step of "controlling the opening of the water-cooled valve according to the water-cooled outlet air temperature" further includes: when the water-cooled outlet air temperature is greater than or equal to a second temperature threshold, controlling the opening of the water-cooled valve to increase until the water-cooled outlet air temperature is less than the second temperature threshold or the opening of the water-cooled valve reaches its maximum opening.

[0010] In some embodiments, the control method further includes: obtaining a first temperature difference between the water-cooled inlet air temperature and the water-cooled outlet air temperature; and controlling the water-cooled valve to close when the first temperature difference is less than or equal to a first temperature difference threshold.

[0011] In some embodiments, the dryer further includes: a body having a communicating drum and a heat pump chamber, wherein the heat pump evaporator and the water cooler are located in the heat pump chamber; and a drying fan disposed in the body for driving airflow to circulate between the heat pump chamber and the drum; the control method further includes: increasing the rotational speed of the drying fan when the water-cooled valve reaches its maximum opening and the duration is greater than or equal to a duration threshold.

[0012] In some embodiments, the dryer further includes: a heat pipe system, including a heat pipe circulation pipe and a heat pipe evaporator, a heat pipe condenser, and a liquid pump disposed on the heat pipe circulation pipe, wherein the heat pipe evaporator is disposed on the air inlet side of the water cooler, and the heat pipe condenser is disposed on the air outlet side of the heat pump evaporator; the control method further includes: acquiring the heat pump evaporator outlet temperature on the air outlet side of the heat pump evaporator; acquiring a second temperature difference between the water cooler inlet temperature and the heat pump evaporator outlet temperature; and controlling the liquid pump to start when the second temperature difference is greater than or equal to a second temperature difference threshold.

[0013] In some embodiments, the control method further includes: controlling the liquid pump to shut down when the second temperature difference is less than a third temperature difference threshold; wherein the third temperature difference threshold is less than the second temperature difference threshold.

[0014] Secondly, this application provides a clothes dryer for performing the above-described clothes dryer control method, the clothes dryer comprising: a heat pump system including a heat pump evaporator; and a water cooling system including a water cooler disposed on the air inlet side of the heat pump evaporator.

[0015] In some embodiments, the dryer further includes: the heat pipe system, including the heat pipe circulation pipe and the heat pipe evaporator and the heat pipe condenser disposed on the heat pipe circulation pipe, wherein the heat pipe evaporator is disposed on the air inlet side of the water cooler and the heat pipe condenser is disposed on the air outlet side of the heat pump evaporator.

[0016] In some embodiments, the heat pipe system further includes the liquid pump and the liquid reservoir, which are disposed in the heat pipe circulation pipeline.

[0017] In the case of adopting the above technical solution, this application adds a water cooler on the air inlet side of the heat pump evaporator. When the water-cooled air inlet temperature is too high, the water cooler is used to pre-cool the air, which can remove some heat, which helps to reduce the number of compressor shutdowns and improve the drying speed of the dryer. Attached Figure Description

[0018] The present application will now be described with reference to the accompanying drawings. In the drawings:

[0019] Figure 1 This is a structural diagram of the dryer provided in this application;

[0020] Figure 2 for Figure 1 The diagram shown is a structural schematic of the heat pipe system in the dryer.

[0021] Figure 3 A flowchart of the main steps of the control method for the dryer provided in this application;

[0022] Figure 4 for Figure 3 The additional steps of the control method are shown in the flowchart.

[0023] List of reference numerals

[0024] 1. Drum; 2. Heat pump chamber; 3. Dryer fan; 100. Heat pump system; 101. Heat pump evaporator; 102. Heat pump condenser; 103. Compressor; 200. Water cooling system; 201. Water cooler; 300. Heat pipe system; 301. Heat pipe circulation piping; 302. Heat pipe evaporator; 303. Heat pipe condenser; 304. Liquid pump; 305. Liquid storage tank. Detailed Implementation

[0025] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. It should be noted that although the detailed steps of the method of this application are described in detail below, those skilled in the art can combine, split, and rearrange the following steps without departing from the basic principles of this application. Such modifications do not change the basic concept of this application and therefore also fall within the scope of protection of this application.

[0026] It should be noted that in the description of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, "a plurality of" refers to at least two.

[0027] This application provides a clothes dryer.

[0028] Combination Figure 1 As shown, the dryer provided in this application includes a body, inside which are arranged a drum 1, a heat pump chamber 2, and a drying fan 3. The drum 1 and the heat pump chamber 2 are connected by an air duct, and the drying fan 3 drives airflow to circulate between the drum 1 and the heat pump chamber 2. The drum 1 is used to hold clothes to be dried, and the heat pump chamber 2 is equipped with a heat pump system, which is used to dry and heat the air to obtain a dry and hot airflow. During the operation of the dryer, the dry and hot airflow enters the drum, accelerates the evaporation of moisture in the clothes, and carries away the evaporated moisture, forming a humid and cold airflow. The humid and cold airflow enters the heat pump chamber 2 for drying and heating to form a dry and hot airflow, which then re-enters the drum, thus achieving the drying process.

[0029] In some embodiments, combined with Figure 1 As shown, the dryer also includes a heat pump system 100, which includes a refrigerant circulation loop, a heat pump evaporator 101, a heat pump condenser 102, and a compressor 103 disposed on the refrigerant circulation loop. The heat pump evaporator 101 is located on the air inlet side of the heat pump condenser 102. The compressor 103 provides power to the heat pump system 100 so that the heat pump evaporator 101 continuously provides cooling and the heat pump condenser 102 continuously provides heating. During the dehumidification process of the dryer, the airflow from the drum flows sequentially through the heat pump evaporator 101 and the heat pump condenser 102. The heat pump evaporator 101 dehumidifies the airflow flowing through it to form a dry and cold airflow. The dry airflow then flows through the heat pump condenser 102, which heats the dry and cold airflow to form a dry and hot airflow. The dry and hot airflow flows back into the drum to dry the clothes inside.

[0030] A heat pump system includes a heat pump evaporator, compressor, condenser, and expansion valve. The refrigerant passes sequentially through the compressor, condenser, expansion valve, and evaporator, absorbing heat in the evaporator and releasing heat in the condenser. Airflow cools and dehumidifies as it passes over the evaporator, and absorbs and heats up as it passes over the condenser. The heat pump system utilizes electrical energy to achieve heat transfer and is a key component for condensation dehumidification and heat recovery in clothes dryers.

[0031] In some embodiments, combined with Figure 1As shown, the dryer also includes a water-cooling system 200, which includes a water cooler 201. The water cooler 201 is located on the air inlet side of the heat pump evaporator 101. The water cooler 201 precools the airflow passing through it with flowing water, removing some of the sensible heat. The precooled airflow then passes through the heat pump evaporator 101, where it removes most of the latent heat. This application adds a water cooler 201 to the air inlet side of the heat pump evaporator 101. When the water-cooled inlet air temperature is too high, the water cooler 201 precools the air, dissipating some heat. This helps reduce the number of compressor shutdowns, improves the cooling capacity utilization of the heat pump evaporator, and increases the drying speed of the dryer.

[0032] Sensible heat refers to the heat that, when added to or removed from a substance, causes a change in temperature without a phase transition. For example, liquid water heating from 40°C to 60°C. Latent heat refers to the heat absorbed or released per unit mass of a substance during a phase transition to another under isothermal and isobaric conditions. For example, water vapor turning into liquid water.

[0033] Optionally, the water cooler 201 includes a water flow channel and a water-cooled valve. The inlet end of the water flow channel is connected to an external water source, and the water-cooled valve can regulate the water flow rate in the water flow channel. When the water-cooled inlet air temperature is too high, the heat pump system generates excessive heat. Turning on the water cooler 201 to pre-cool the air can dissipate some of the heat, which helps reduce the number of compressor shutdowns and improves the cooling capacity utilization rate of the heat pump evaporator and the drying speed of the dryer. The cooling capacity of the water cooler 201 can be adjusted by changing the opening degree of the water-cooled valve. Furthermore, this invention uses an external water source, which allows for controllable water flow and stable water temperature, resulting in better condensation performance.

[0034] Optionally, the water cooler 201 includes a coil that defines a water flow channel. The coil includes an inlet and an outlet. The inlet is connected to an external water source, such as the tap water in a user's home. The outlet can be connected to the drain pipe in the user's home, or a water storage device can be installed to store wastewater. No specific limitation is made here.

[0035] In some embodiments, combined with Figure 1 and Figure 2 As shown, the dryer also includes a heat pipe system 300. The heat pipe system 300 includes a heat pipe circulation pipe 301 and a heat pipe evaporator 302 and a heat pipe condenser 303 disposed on the heat pipe circulation pipe 301. The heat pipe evaporator 302 is disposed on the air inlet side of the water cooler 201, and the heat pipe condenser 303 is disposed on the air outlet side of the heat pump evaporator 101.

[0036] A significant temperature difference exists between the air inlet side of the water cooler 201 and the air outlet side of the heat pump evaporator 101. Driven by this temperature difference, the heat pipe system 300 can transfer heat from the air inlet side of the water cooler 201 to the air outlet side of the heat pump evaporator 101, improving energy utilization. Placing the heat pipe evaporator 302 on the air inlet side of the water cooler 201 further pre-cools the airflow entering the heat pump system, which helps to remove some of the sensible heat from the airflow, further improving the dehumidification efficiency of the water cooler and the heat pump evaporator 101. The heat pipe condenser 303 is placed on the air outlet side of the heat pump evaporator 101 to preheat the airflow, which helps to increase the temperature of the dry, hot airflow. The introduction of the heat pipe system 300 can reduce the load on the heat pump evaporator 101 and the heat pump condenser 102 in the heat pump system, improving the overall energy efficiency of the heat pump system.

[0037] Optionally, the heat pipe system 300 also includes a liquid pump 304 and a liquid storage tank 305. The refrigerant inside the heat pipe evaporator 302 exchanges heat with the high-temperature gas outside. The refrigerant absorbs heat, turns into a gas, and is transported to the heat pipe condenser 303. In the heat pipe condenser 303, it releases heat and turns into a liquid, transferring heat to the relatively cooler gas outside the heat pipe condenser 303. Then, the liquid pump returns the liquid to the heat pipe evaporator 302, thus realizing the circulation of the heat pipe system and transferring heat from the air inlet side of the water cooler 201 to the air outlet side of the heat pump evaporator 101. The external gas first passes through the heat pipe evaporator 302 for dehumidification and drying, and then passes through the heat pipe condenser 303 to absorb heat and increase its temperature.

[0038] Understandably, even without the liquid pump 304 operating, the refrigerant, due to the temperature difference, can still transfer heat from the inlet side of the water cooler 201 to the outlet side of the heat pump evaporator 101. The refrigerant inside the heat pipe evaporator 302 exchanges heat with the external high-temperature gas. The refrigerant absorbs heat and turns into gas, increasing its pressure. Under this pressure, the gas enters the heat pipe condenser 303, where it releases heat and turns into liquid. The liquid refrigerant then flows back to the heat pipe evaporator 302 under gravity, transferring heat to the relatively cooler gas outside the heat pipe condenser 303. This cycle allows the refrigerant to transfer heat from the inlet side of the water cooler 201 to the outlet side of the heat pump evaporator 101 due to the temperature difference.

[0039] In summary, the dryer of this application incorporates a heat pipe system 300 and a water cooling system 200. Following the airflow direction within the dryer, the heat pipe evaporator 302, water cooler 201, heat pump evaporator 101, heat pipe condenser 303, and heat pump condenser 102 are arranged in that order, allowing the gas to sequentially pass through each heat exchanger to complete the cooling, dehumidification, and reheating process.

[0040] This application provides a control method for a clothes dryer.

[0041] Combination Figure 3 As shown, the control method for the clothes dryer provided in this application includes:

[0042] S301, obtain the water-cooled air inlet temperature on the air inlet side of the water cooler.

[0043] In other words, the temperature of the air inlet side of the water cooler is obtained and recorded as the water-cooled air inlet temperature. Since the drying airflow passes through the heat exchanger, water cooler, heat pipe evaporator, heat pump evaporator, heat pipe condenser, and heat pump condenser in sequence, the water-cooled air inlet temperature is also the air outlet temperature of the dryer drum.

[0044] S302, when the water-cooled inlet air temperature is greater than or equal to a first temperature threshold and the duration is greater than or equal to a duration threshold, control the water cooler to pre-cool the air flowing through the water cooler. For example, the first temperature threshold is 40°C and the duration threshold is 1 minute.

[0045] If the water-cooled intake air temperature is greater than or equal to the first temperature threshold and the duration is greater than or equal to the duration threshold, it indicates that the water-cooled intake air temperature is continuously too high, which may cause the heat pump system to generate too much heat and the heat pump system compressor to frequently shut down.

[0046] In the case of adopting the above technical solution, this application adds a water cooler on the air inlet side of the heat pump evaporator. When the water-cooled air inlet temperature is too high, the water cooler is used to pre-cool the air, which can remove some heat, which helps to reduce the number of compressor shutdowns and improve the drying speed of the dryer.

[0047] In some embodiments, the control method further includes: acquiring the water-cooled outlet air temperature on the outlet side of the water cooler; and controlling the opening degree of the water-cooled valve based on the water-cooled outlet air temperature.

[0048] During the operation of the water chiller, the water-cooled outlet air temperature is continuously monitored. If the water-cooled outlet air temperature does not drop below the second temperature threshold within the set time period, it indicates that the cooling load provided by the water chiller is insufficient at the current opening of the water-cooled valve. The opening of the water-cooled valve needs to be increased until the water-cooled outlet air temperature drops below the second temperature threshold to ensure the removal of excess heat from the heat pump system, reduce the number of compressor shutdowns, and improve the drying rate of the dryer. The second temperature threshold is lower than the first temperature threshold.

[0049] In some embodiments, the step of "controlling the opening of the water-cooled valve according to the water-cooled outlet air temperature" further includes: when the water-cooled outlet air temperature is greater than or equal to a second temperature threshold, controlling the opening of the water-cooled valve to increase until the water-cooled outlet air temperature is less than the second temperature threshold or the opening of the water-cooled valve reaches its maximum opening.

[0050] If the water-cooled outlet air temperature is greater than or equal to the second temperature threshold, it means that the cooling load provided by the water cooler is not enough at the current opening of the water-cooled valve. The opening of the water-cooled valve needs to be increased until the water-cooled outlet air temperature drops below the second temperature threshold or the opening of the water-cooled valve reaches its maximum opening, in order to ensure that excess heat from the heat pump system is discharged.

[0051] In some embodiments, the control method further includes: acquiring a first temperature difference between the water-cooled inlet air temperature and the water-cooled outlet air temperature. If the first temperature difference is less than or equal to a first temperature difference threshold, the water-cooled valve is controlled to close. When the first temperature difference is lower than the first temperature difference threshold, it indicates that the water cooler is not effective in removing sensible heat from the air, possibly due to factors such as excessively high water temperature in the water cooler. In this case, closing the water valve can save water consumption.

[0052] In some embodiments, the control method further includes: increasing the rotational speed of the dryer fan when the water-cooled valve reaches its maximum opening and the duration is greater than or equal to a duration threshold. When it is detected that the water-cooled valve reaches its maximum opening and the duration is greater than or equal to the duration threshold, it is proven that the water cooler is not effective in removing sensible heat from the air, and the rotational speed of the dryer fan is increased to accelerate the airflow circulation speed and accelerate heat dissipation.

[0053] Optionally, the control method further includes: closing the water-cooled valve when the water-cooled air inlet temperature is lower than the preset temperature. At this time, the drying process of the dryer is nearing its end, the heat pump system has been shut down, and closing the water-cooled valve avoids wasting water resources.

[0054] In some embodiments, combined with Figure 4 As shown, the control method also includes:

[0055] S401, obtain the outlet air temperature of the heat pump evaporator on the outlet side of the heat pump evaporator.

[0056] In other words, the temperature of the air outlet side of the heat pump evaporator is obtained and recorded as the air outlet temperature of the heat pump evaporator.

[0057] S402, obtains the second temperature difference between the water-cooled inlet air temperature and the heat pump evaporator outlet air temperature.

[0058] S403: When the second temperature difference is greater than or equal to the second temperature difference threshold, control the liquid pump to start.

[0059] The heat pipe system is primarily driven by temperature difference. As the drying process progresses, the liquid pump of the heat pipe system starts after the second temperature difference is greater than or equal to the second temperature difference threshold for a certain period of time. The heat pump system transfers waste heat from the air inlet side of the water cooler to the air outlet side of the evaporator, improving energy utilization efficiency.

[0060] In some embodiments, the control method further includes: controlling the liquid pump to shut down when the second temperature difference is less than a third temperature difference threshold. The third temperature difference threshold is less than the second temperature difference threshold; for example, the second temperature difference threshold is 20°C and the third temperature difference threshold is 12°C.

[0061] The heat pipe system mainly relies on temperature difference for driving. When the second temperature difference is less than the third temperature difference threshold for a certain period of time, the liquid pump does not need to transfer the refrigerant and shuts off.

[0062] This application provides a computer-readable storage medium storing a computer program, wherein the computer program, when executed, performs the aforementioned control method for a clothes dryer. The aforementioned computer-readable storage medium can be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0063] This application provides an electronic device including a memory and a processor. The memory stores a computer program, and the processor can call and run the computer program to execute the control method for the clothes dryer described above. Optionally, the device may further include a communication interface and a bus. The processor, communication interface, and memory can communicate with each other via the bus. The communication interface can be used for information transmission. The processor can call logical instructions in the memory to execute the control method for the clothes dryer described above.

[0064] Furthermore, the logical instructions in the aforementioned memory can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0065] Memory, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of this application. The processor executes the program instructions / modules stored in the memory to perform functional applications and data processing, that is, to implement the control method of the clothes dryer in the above embodiments.

[0066] The memory may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory may include high-speed random access memory and may also include non-volatile memory.

[0067] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.

[0068] Although the steps in the above embodiments are described in the above order, those skilled in the art will understand that in order to achieve the effect of this embodiment, different steps do not need to be executed in such order. They can be executed simultaneously (in parallel) or in reverse order. These simple changes are all within the protection scope of this application.

[0069] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, 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 scope of protection of this application.

Claims

1. A control method for a clothes dryer, characterized in that, The clothes dryer includes: Heat pump systems, including heat pump evaporators; and A water-cooling system, including a water cooler, wherein the water cooler is disposed on the air inlet side of the heat pump evaporator; The control method includes: Obtain the water-cooled air inlet temperature on the air inlet side of the water cooler; When the water-cooled inlet air temperature is greater than or equal to a first temperature threshold and the duration is greater than or equal to a duration threshold, the water cooler is controlled to cool the air flowing through the water cooler.

2. The control method according to claim 1, characterized in that, The water cooler includes: a water flow channel connected to an external water source; and a water-cooling valve disposed on the water flow channel. The control method further includes: Obtain the water-cooled outlet air temperature on the outlet side of the water cooler; The opening degree of the water-cooled valve is controlled according to the water-cooled outlet air temperature.

3. The control method according to claim 2, characterized in that, The step of "controlling the opening degree of the water-cooled valve according to the water-cooled outlet air temperature" further includes: When the water-cooled outlet air temperature is greater than or equal to the second temperature threshold, the opening degree of the water-cooled valve is increased until the water-cooled outlet air temperature is less than the second temperature threshold or the opening degree of the water-cooled valve reaches the maximum opening degree.

4. The control method according to claim 3, characterized in that, The control method further includes: Obtain the first temperature difference between the water-cooled inlet air temperature and the water-cooled outlet air temperature; When the first temperature difference is less than or equal to the first temperature difference threshold, the water-cooling valve is controlled to close.

5. The control method according to claim 2, characterized in that, The dryer further includes: a body, which is provided with a connected drum and a heat pump chamber, wherein the heat pump evaporator and the water cooler are located in the heat pump chamber; and a drying fan, which is provided in the body and is used to drive airflow to circulate between the heat pump chamber and the drum. The control method further includes: When the water-cooled valve reaches its maximum opening and the duration is greater than or equal to the duration threshold, the rotational speed of the clothes dryer is increased.

6. The control method according to any one of claims 1 to 5, characterized in that, The dryer also includes a heat pipe system, including a heat pipe circulation pipeline and a heat pipe evaporator, a heat pipe condenser and a liquid pump disposed on the heat pipe circulation pipeline. The heat pipe evaporator is disposed on the air inlet side of the water cooler and the heat pipe condenser is disposed on the air outlet side of the heat pump evaporator. The control method further includes: Obtain the outlet air temperature of the heat pump evaporator on the outlet side; Obtain the second temperature difference between the water-cooled inlet air temperature and the heat pump evaporator outlet air temperature; When the second temperature difference is greater than or equal to the second temperature difference threshold, the liquid pump is controlled to start.

7. The control method according to claim 6, characterized in that, The control method further includes: When the second temperature difference is less than the third temperature difference threshold, the liquid pump is controlled to shut down; wherein the third temperature difference threshold is less than the second temperature difference threshold.

8. A clothes dryer for executing the control method of the clothes dryer according to claim 6 or 7, characterized in that, The clothes dryer includes: The heat pump system includes a heat pump evaporator; and The water cooling system includes a water cooler, which is located on the air inlet side of the heat pump evaporator.

9. The clothes dryer according to claim 8, characterized in that, The dryer also includes: The heat pipe system includes the heat pipe circulation pipeline and the heat pipe evaporator and the heat pipe condenser disposed on the heat pipe circulation pipeline. The heat pipe evaporator is disposed on the air inlet side of the water cooler, and the heat pipe condenser is disposed on the air outlet side of the heat pump evaporator.

10. The clothes dryer according to claim 9, characterized in that, The heat pipe system also includes the liquid pump and the liquid reservoir, which are disposed in the heat pipe circulation pipeline.

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