Control method and control device of a heat dissipation fan of a clothes dryer, and clothes dryer

Abstract

The application provides a control method and device of a heat dissipation fan of a clothes dryer and the clothes dryer. The clothes dryer comprises a compressor and a heat dissipation fan for dissipating heat of the compressor. The control method comprises the following steps: obtaining an exhaust temperature of the compressor after the heat dissipation fan continuously operates at a current rotating speed for a first time length; determining whether the exhaust temperature of the compressor is within a preset temperature range; if not, adjusting the rotating speed of the heat dissipation fan according to the exhaust temperature of the compressor; and repeatedly performing the steps of obtaining the exhaust temperature of the compressor until the exhaust temperature of the compressor is within the temperature range. The control method provided by the application can solve the problem that the clothes dryer in the prior art cannot accurately control the heat dissipation fan to dissipate heat of the compressor.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a control method, control device and dryer for a clothes dryer's cooling fan. Background Technology

[0002] A heat pump dryer is a household appliance used for drying clothes. It includes components such as a drum, a fan, an air duct, and a heat pump system. The drum holds the clothes and can rotate. The air duct is connected to the drum. The heat pump system exchanges heat with the air in the air duct. The fan drives the air to circulate between the drum and the air duct.

[0003] During the operation of a heat pump system, the compressor continuously generates heat. Therefore, current heat pump dryers are typically equipped with a cooling fan to achieve forced convection cooling of the compressor, ensuring stable operation of the dryer over extended periods.

[0004] However, current dryers cannot accurately control the cooling fan to cool the compressor, which may result in the compressor's exhaust temperature being too high or too low. If the compressor's exhaust temperature is too high, it will trigger the compressor's overheat protection mechanism and may also cause the temperature of the drying air entering the drum to be too high, damaging the clothes. If the compressor's exhaust temperature is too low, it will reduce drying efficiency, leading to longer drying times.

[0005] There is currently no effective solution to the problem that current dryers cannot accurately control the cooling fan to dissipate heat from the compressor. Summary of the Invention

[0006] This application provides a method, device, and dryer for controlling the cooling fan of a dryer, in order to solve the problem that existing dryers cannot accurately control the cooling fan to cool the compressor.

[0007] In a first aspect, a control method for a cooling fan in a clothes dryer is provided. The clothes dryer includes a compressor and a cooling fan for cooling the compressor. The control method includes: after the cooling fan has been running continuously at a current speed for a first duration, acquiring the exhaust temperature of the compressor; determining whether the exhaust temperature of the compressor is within a preset temperature range; if not, adjusting the speed of the cooling fan according to the exhaust temperature of the compressor; repeating the steps of acquiring the exhaust temperature of the compressor until adjusting the speed of the cooling fan according to the exhaust temperature of the compressor, until the exhaust temperature of the compressor is within the temperature range.

[0008] According to the control method for the cooling fan of the dryer provided in this application, the exhaust temperature is detected after the cooling fan has been running at its current speed for a period of time. This allows the detected exhaust temperature to more accurately reflect the compressor's heat load status or heat dissipation requirements. If the detected exhaust temperature is not within the preset temperature range, it indicates that the current speed of the cooling fan is unreasonable, such as insufficient or excessive heat dissipation, and therefore the speed of the cooling fan needs to be adjusted. This application can perform continuous, step-by-step adjustments to the cooling fan speed, using the previous adjustment result as feedback and a basis for the next speed adjustment, until the compressor's exhaust temperature is within the preset range.

[0009] This application dynamically adjusts the speed of the cooling fan, achieving precise control of the compressor exhaust temperature. This ensures the compressor exhaust temperature remains within a safe and ideal range, avoiding overheating and clothing damage caused by excessively high exhaust temperatures, while also preventing reduced drying efficiency and prolonged drying time due to excessively low exhaust temperatures. This application solves the problem in existing dryers where the cooling fan cannot accurately control the compressor's cooling effect, improving the dryer's operational stability and safety, optimizing drying efficiency, reducing energy consumption, and providing users with a more efficient, energy-saving, and safe clothes drying experience.

[0010] In one possible implementation, adjusting the speed of the cooling fan based on the exhaust temperature of the compressor includes: adjusting the duty cycle of the PWM signal of the cooling fan and / or the supply voltage to achieve speed adjustment of the cooling fan.

[0011] By adjusting the duty cycle of the cooling fan's PWM signal and / or its supply voltage, fine-tuning of the cooling fan's speed can be achieved, such as stepless speed regulation. This adjustment method not only has a fast response time but also allows for flexible adjustment of the fan speed as needed, enabling better control of the compressor's exhaust temperature.

[0012] In one possible implementation, if the exhaust temperature of the compressor is less than the lower limit of the temperature range, adjusting the speed of the cooling fan according to the exhaust temperature of the compressor includes: controlling the cooling fan to stop running until the exhaust temperature of the compressor reaches the ideal exhaust temperature value, and then controlling the cooling fan to run with a second duty cycle; wherein the second duty cycle is obtained by reducing the first duty cycle corresponding to the current speed by one step, and the ideal exhaust temperature value is within the temperature range.

[0013] When the compressor's exhaust temperature is below the lower limit of this temperature range, it indicates that the exhaust temperature is too low. In this case, the cooling fan should be stopped first to ensure that the exhaust temperature can quickly recover to a reasonable range. This can prevent the drying efficiency problem caused by prolonged low exhaust temperature.

[0014] Once the exhaust temperature gradually rises to the preset ideal exhaust temperature value, the cooling fan can be restarted with a small duty cycle, and its speed gradually reduced in a step-by-step manner until the compressor's exhaust temperature is stably maintained within a reasonable range. This application allows for flexible adjustment of the fan speed as needed, enabling fine-tuning of the cooling fan speed and better control of the compressor's exhaust temperature.

[0015] In one possible implementation, if the exhaust temperature of the compressor is greater than the upper limit of the temperature range, adjusting the speed of the cooling fan according to the exhaust temperature of the compressor includes: controlling the cooling fan to run at full speed until the exhaust temperature of the compressor drops to the ideal exhaust temperature value, and then controlling the cooling fan to run with a third duty cycle, wherein the third duty cycle is obtained by adding a step to the first duty cycle.

[0016] When the compressor's exhaust temperature exceeds the upper limit of this temperature range, it indicates that the exhaust temperature is too high. In this case, you should first control the cooling fan to run at full speed to ensure that the exhaust temperature can quickly drop to a reasonable range. This can prevent problems such as overheating protection and damage to clothing caused by prolonged excessively high exhaust temperatures.

[0017] Once the exhaust temperature gradually drops to the preset ideal exhaust temperature value, the cooling fan can be restarted with a larger duty cycle, and the fan speed can be gradually increased in a stepwise manner until the compressor's exhaust temperature is stably maintained within a reasonable range. This application allows for flexible adjustment of the fan speed as needed, enabling fine-tuning of the cooling fan speed and better control of the compressor's exhaust temperature.

[0018] In one possible implementation, before obtaining the exhaust temperature of the compressor, the control method further includes: controlling the compressor to start, and controlling the cooling fan to run at a preset initial speed after the exhaust temperature of the compressor reaches the ideal exhaust temperature value.

[0019] After the compressor starts and reaches the ideal exhaust temperature, the cooling fan is then started and runs at a preset initial speed. This ensures that the cooling fan only starts working after the compressor is operating stably, avoiding unnecessary energy consumption and providing stable initial conditions for subsequent precise heat dissipation control.

[0020] In one possible implementation, if the exhaust temperature of the compressor is determined to be within the temperature range, the control method further includes controlling the cooling fan to continue operating at the current speed.

[0021] When the compressor's exhaust temperature is already within the preset temperature range, the cooling fan continues to run at its current speed without any additional adjustments. This reduces unnecessary control operations, improves system reliability, and helps extend the lifespan of the cooling fan.

[0022] Secondly, a control device for a cooling fan in a clothes dryer is provided. The clothes dryer includes a compressor and a cooling fan for cooling the compressor. The control device includes: an acquisition unit for acquiring the exhaust temperature of the compressor after the cooling fan has been running continuously at a current speed for a first duration; a determination unit for determining whether the exhaust temperature of the compressor is within a preset temperature range; and a control unit for adjusting the speed of the cooling fan according to the exhaust temperature of the compressor when the exhaust temperature of the compressor is not within the temperature range. The step of acquiring the exhaust temperature of the compressor and adjusting the speed of the cooling fan according to the exhaust temperature of the compressor is repeated until the exhaust temperature of the compressor is within the temperature range.

[0023] In one possible implementation, the control unit is specifically used to: adjust the duty cycle and / or supply voltage of the PWM signal of the cooling fan to achieve speed regulation of the cooling fan.

[0024] In one possible implementation, if the exhaust temperature of the compressor is less than the lower limit of the temperature range, the control unit is specifically used to: control the cooling fan to stop running until the exhaust temperature of the compressor reaches the ideal exhaust temperature value, and then control the cooling fan to run with a second duty cycle; wherein the second duty cycle is obtained by reducing the first duty cycle corresponding to the current speed by one step, and the ideal exhaust temperature value is within the temperature range.

[0025] In one possible implementation, if the exhaust temperature of the compressor is greater than the upper limit of the temperature range, the control unit is specifically used to: control the cooling fan to run at full speed until the exhaust temperature of the compressor drops to the ideal exhaust temperature value, and then control the cooling fan to run with a third duty cycle, wherein the third duty cycle is obtained by adding a step to the first duty cycle.

[0026] In one possible implementation, the control unit is further configured to: control the compressor to start, and control the cooling fan to run at a preset initial speed after the compressor's exhaust temperature reaches the ideal exhaust temperature value.

[0027] In one possible implementation, if it is determined that the exhaust temperature of the compressor is within the temperature range, the control unit is further configured to: control the cooling fan to continue operating at the current speed.

[0028] Thirdly, a control device for a cooling fan of a clothes dryer is provided. The clothes dryer includes a compressor and a cooling fan for cooling the compressor. The control device includes a processor, a memory, and a computer program stored in the memory. When the computer program is executed by the processor, the control device performs the control method provided by any of the implementations of the first aspect.

[0029] Fourthly, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed on an electronic device, causes the electronic device to perform the control method provided by any of the implementations of the first aspect.

[0030] Fifthly, a computer program product is provided, comprising: computer program code, which, when executed on an electronic device, causes the electronic device to perform the control method provided by any of the implementations of the first aspect.

[0031] In a sixth aspect, a chip is provided, comprising: a processor for calling and running a computer program from a memory, causing an electronic device on which the chip is mounted to perform the control method provided by any of the implementations of the first aspect.

[0032] Understandably, the control device provided in the second and third aspects, the computer-readable storage medium provided in the fourth aspect, the computer program product provided in the fifth aspect, and the chip provided in the sixth aspect are all used to execute the control method provided in the first aspect. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods provided above, and will not be repeated here. Attached Figure Description

[0033] Figure 1 This is a structural block diagram of an example of a clothes dryer provided in the embodiments of this application.

[0034] Figure 2 This is a structural block diagram of another example of the clothes dryer provided in the embodiments of this application.

[0035] Figure 3This is a structural block diagram of another example of the dryer provided in the embodiments of this application.

[0036] Figure 4 This is a circuit connection diagram of the cooling fan provided in an embodiment of this application.

[0037] Figure 5 This is a flowchart illustrating an example of the control method for the cooling fan of a clothes dryer provided in this application.

[0038] Figure 6 This is a flowchart of another example of the control method for the cooling fan of a clothes dryer provided in this application.

[0039] Figure 7 This is a schematic block diagram of an example of the control device for the cooling fan of a clothes dryer provided in this application.

[0040] Figure 8 This is a structural block diagram of another example of the control device for the cooling fan of the dryer provided in this application.

[0041] Figure label:

[0042] 10. Heat pump system; 11. Compressor; 12. Condenser; 13. Throttling device; 14. Evaporator;

[0043] 20. Air circulation system; 21. Drum; 22. Air duct; 23. Circulating fan;

[0044] 100. First drying subsystem; 110. Compressor; 120. Condenser; 130. First evaporator; 140. First fan; 200. Second drying subsystem; 210. Moisture absorption and dehumidification device; 211. Dehumidification disc; 212. Heater; 220. Second evaporator; 230. Second fan; 300. Shut-off valve; 400. Throttling device; 500. Drying drum; L10. Refrigerant circulation path; L20. Drying air circulation path; L30. Desorption air circulation path;

[0045] 30. Cooling fan; 40. Control device; 50. Temperature sensor. Detailed Implementation

[0046] The technical solutions of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0047] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0048] The term "comprising" in this document indicates the presence of the described feature, whole, step, operation, element, and / or component, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or collections thereof. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0049] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0050] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0051] To address the problem that current dryers cannot accurately control the cooling fan to dissipate heat from the compressor, this application provides a method for controlling the cooling fan of a dryer. By acquiring the exhaust temperature of the compressor and intelligently controlling the speed of the cooling fan based on the exhaust temperature and a preset temperature range, precise control of the compressor exhaust temperature is achieved. This ensures that the compressor exhaust temperature is always maintained within a safe and ideal range, avoiding overheating and clothing damage caused by excessively high exhaust temperatures, as well as reducing drying efficiency and prolonging drying time due to excessively low exhaust temperatures.

[0052] The control method for the cooling fan of a clothes dryer provided in this application embodiment can be applied to heat pump clothes dryers. The following is a description of the clothes dryer using this control method, that is, the specific application scenario of the control method for the cooling fan of a clothes dryer provided in this application embodiment.

[0053] Figure 1 This is a structural block diagram of an example of a clothes dryer provided in an embodiment of this application. Figure 1 As shown, the dryer provided in this embodiment includes a heat pump system 10, an air circulation system 20, and a cooling fan 30.

[0054] The heat pump system 10 includes a compressor 11, a condenser 12, a throttling device 13, and an evaporator 14, which are sequentially connected in a closed loop via refrigerant pipelines, with the refrigerant circulating within the pipelines. The air circulation system 20 consists of a drum 21, an air duct 22, and a circulating fan 23. The drum 21 is used to load and tumble clothes for even drying; the air duct 22 is connected to both ends of the drum 21 to form a closed-loop path for air circulation; and the circulating fan 23 provides power to drive the air to circulate within this closed-loop path.

[0055] For example, the principle of the clothes dryer provided in this application embodiment for drying clothes is as follows: Circulating air is heated by the condenser 12 to generate dry hot air. The hot air is blown into the drum 21, passing through the wet clothes and carrying away the moisture on the clothes. After passing through the wet clothes, the dry hot air becomes warm and humid air and enters the evaporator 14 to be cooled and release moisture, becoming dry cold air. The dry cold air is then circulated back into the condenser 12, heated again to become dry hot air, and enters the drum 21 again to dry the clothes. The above drying steps are repeated to realize the drying process of the clothes dryer.

[0056] In some examples, the dryer provided in this application embodiment also has a washing function, that is, the dryer may also have a function that does not wash clothes. Figure 1 The modules related to the washing function shown in the figure mean that the dryer provided in the embodiments of this application can also be a washer-dryer combo.

[0057] like Figure 1 As shown in the illustration, the dryer provided in this embodiment also includes a cooling fan 30, the air outlet of which faces the compressor 11, for forced convection cooling of the compressor 11. For example, the cooling fan 30 can be an axial fan, a centrifugal fan, or a cross-flow fan.

[0058] In this embodiment, the rotational speed of the cooling fan 30 can be adjusted, thereby adjusting the airflow delivered to the compressor 11. For example, the airflow of the cooling fan 30 can be adjusted by changing its rotational speed. For example, the cooling fan 30 can be a fan with stepless speed regulation, enabling stepless adjustment of the airflow; or, the cooling fan 30 can have multiple speed settings, such as high, medium, and low speeds, allowing adjustment of the airflow by changing the speed settings. For example, the cooling fan 30 can be an electronically commutated (EC) fan.

[0059] Figure 2 This is a structural block diagram of another example of the dryer provided in the embodiments of this application. Figure 3 This is a structural block diagram of yet another example of the clothes dryer provided in the embodiments of this application. (Refer to...) Figure 2 and Figure 3 The dryer in this application embodiment includes a first drying subsystem 100 and a second drying subsystem 200. The first drying subsystem 100 includes a condenser 120 and a first evaporator 130 disposed in the refrigerant circulation path L10. The second drying subsystem 200 includes a moisture absorption and dehumidification device 210 and a regeneration device (which may include a second evaporator 220). The first evaporator 130, the moisture absorption and dehumidification device 210 and the condenser 120 are disposed in the drying air circulation path L20, and the second drying subsystem 200 is configured to start or stop at different drying stages of the first drying subsystem 100.

[0060] Understandably, the refrigerant circulation path L10 is also equipped with a compressor 110 and a throttle 400. The drying air circulation path L20 is also equipped with a first fan 140, which is used to provide the circulation power for the drying air in the drying air circulation path L20.

[0061] In this embodiment, the first drying subsystem 100 includes a compressor 110, which can be a piston, scroll, or screw compressor, etc. The compressor 110 can drive the refrigerant to flow along the refrigerant circulation path L10. When the refrigerant passes through the condenser 120, it releases heat, and the condenser 120 can use the heat released by the refrigerant to heat the drying air in the drying air circulation path L20. When the refrigerant passes through the first evaporator 130, it absorbs heat, and the first evaporator 130 can use the heat absorbed by the refrigerant to cool the drying air, so that the water vapor in the drying air is condensed and removed.

[0062] In this embodiment, the second drying subsystem 200 includes a moisture absorption and dehumidification device 210. The device uses materials such as zeolite, silica gel, and activated carbon to absorb moisture from the drying air, thus re-drying the air into extremely low-humidity air. This allows the drying air to carry away more moisture as it passes over the object to be dried, accelerating the drying process. Furthermore, the adsorption heat generated during the absorption process of the device 210 can be used to heat the drying air, improving energy utilization. A regeneration device is used to desorb the moisture absorbed by the device 210, restoring it to a low-humidity state so that it can continue to absorb moisture from the drying air.

[0063] In this embodiment, the cooperation of the first drying subsystem 100 and the second drying subsystem 200 can provide high-temperature, high-dryness drying air. The drying air passes through the drying air circulation path L20 and then through the object to be dried (which can be housed in the drying cylinder 500 in the drying air circulation path L20), exchanging heat and moisture with the object to be dried, raising the temperature of the object to be dried and reducing its humidity, thus becoming low-temperature, high-humidity drying air. The low-temperature, high-humidity drying air is further dehumidified by the first evaporator 130 and then by the moisture absorption and dehumidification device 210, becoming low-temperature, high-dryness drying air. The low-temperature, high-dryness drying air is then heated by the condenser 120 and becomes high-temperature, high-dryness drying air again, thus realizing the circulation of the drying air.

[0064] In this embodiment, the start-up of the second drying subsystem 200 means that the moisture absorption and dehumidification device 210 and the regeneration device are in working condition, capable of desorbing moisture from the drying air. The shutdown of the second drying subsystem 200 means that the moisture absorption and dehumidification device 210 and the regeneration device are in a closed or standby state, with no energy consumption or low energy consumption, and the second drying subsystem 200 does not participate in drying.

[0065] In this embodiment, the first drying subsystem 100 participates in the drying of the object to be dried throughout the entire process. It is understood that the humidity, temperature, and other properties of the object to be dried are different at different drying stages. The second drying subsystem 200 is activated at different drying stages of the first drying subsystem 100 to assist the first drying subsystem 100 in drying, thereby shortening the time of the corresponding drying stage and improving drying efficiency.

[0066] The technical solution provided in this application embodiment allows both the first drying subsystem 100 and the second drying subsystem 200 to be used for drying clothes. The first drying subsystem 100 includes a compressor 110, a condenser 120, and a first evaporator 130 located in the refrigerant circulation path L10. The compressor 110 drives the refrigerant to circulate, causing the refrigerant to condense and release heat in the condenser 120, which can be used to heat the drying air. The refrigerant evaporates and absorbs heat in the first evaporator 130, which can be used to condense and remove water vapor from the drying air. The second drying subsystem 200 includes a moisture-absorbing and dehumidifying device 210 and a regeneration device. The moisture-absorbing and dehumidifying device 210 can absorb water vapor, while the regeneration device removes water vapor to regenerate the moisture-absorbing and dehumidifying device 210.

[0067] The first evaporator 130, the dehumidification device 210, and the condenser 120 are arranged in the drying air circulation path L20. Drying air circulates in the drying air circulation path L20. The drying air absorbs moisture from the object to be dried to dry it. The first evaporator 130 can condense and remove the moisture in the drying air. The dehumidification device 210 can further adsorb the moisture in the drying air to dry it a second time. The condenser 120 heats the drying air to generate high-temperature and high-dryness drying air so as to quickly dry the object to be dried.

[0068] Based on this, the second drying subsystem 200 is configured to start or stop at different drying stages of the first drying subsystem 100. The first drying subsystem 100 can be used to continuously dry the items to be dried. At different drying stages, the second drying subsystem 200 can be started or stopped in stages. Starting the second drying subsystem 200 can assist in drying, thereby improving drying efficiency and saving drying time. Stopping the second drying subsystem 200 can reduce energy consumption.

[0069] To improve regeneration efficiency and facilitate deployment, refer to Figure 2 and Figure 3 In some possible embodiments of this application, the regeneration device includes a second evaporator 220, and a moisture absorption and dehumidification device 210 is disposed in the desorption air circulation path L30. The second evaporator 220 is used to dehumidify the desorption air that has passed through the moisture absorption and dehumidification device 210.

[0070] Understandably, the second drying subsystem 200 also includes a second fan 230, which is used to provide the circulation power for the desorption air in the desorption air circulation path L30.

[0071] In this embodiment, the second evaporator 220 can be set in the refrigerant circulation path L10. The second evaporator 220 and the first evaporator 130 can be set in series or in parallel in the refrigerant circulation path L10. The refrigerant absorbs heat through the second evaporator 220 to reduce the temperature of the desorption air passing through the second evaporator 220. The water vapor in the desorption air condenses and is dehumidified and dried. The desorption air with high dryness dried by the second evaporator 220 passes through the moisture absorption and dehumidification device 210, which can carry away the water vapor adsorbed by the moisture absorption and dehumidification device 210 to complete the regeneration of the moisture absorption and dehumidification device 210.

[0072] The technical solution provided in this application embodiment sets a second evaporator 220 as a regeneration device. The second evaporator 220 has a high removal effect on water vapor in the desorption air, and the second evaporator 220 can be set in the refrigerant circulation path L10, so that the first drying subsystem 100 and the second drying subsystem 200 are integrated, simplifying the structure and facilitating the layout of the regeneration device.

[0073] To simplify the structure, refer to Figure 3 In some possible embodiments of this application, the second evaporator 220 and the first evaporator 130 are connected in series in the refrigerant circulation path L10, and the second evaporator 220 is located upstream of the first evaporator 130.

[0074] In this embodiment, the first evaporator 130 and the second evaporator 220 are connected in series, meaning that the refrigerant passes through one evaporator first and then the other during the refrigerant circulation process. In one example, the second evaporator 220 is located upstream of the first evaporator 130. The refrigerant first passes through the second evaporator 220 to remove moisture from the desorption air, and then passes through the first evaporator 130 to remove moisture from the drying air.

[0075] In another example, the second evaporator 220 is located downstream of the first evaporator 130. The refrigerant first passes through the first evaporator 130 to remove moisture from the drying air, and then passes through the second evaporator 220 to remove moisture from the desorption air.

[0076] The technical solution provided in this application embodiment connects the second evaporator 220 and the first evaporator 130 in series in the refrigerant circulation path L10. The refrigerant flows through the second evaporator 220 and the first evaporator 130 in sequence to remove water vapor from the desorption air and the drying air, respectively. The pipeline structure is relatively simple and easy to lay out.

[0077] To optimize the refrigerant circulation path, refer to Figure 2 In some possible embodiments of this application, the second evaporator 220 and the first evaporator 130 are arranged in parallel in the refrigerant circulation path L10, and a shut-off valve 300 is provided on the inlet side of the second evaporator 220; the shut-off valve 300 is configured to open when the second drying subsystem 200 is started and close when the second drying subsystem 200 is shut down.

[0078] In this embodiment of the application, the first evaporator 130 and the second evaporator 220 are arranged in parallel, that is, the two are connected to the compressor 110 through different pipelines. The refrigerant can pass through only one of the first evaporator 130 and the second evaporator 220, or it can be split to pass through the first evaporator 130 and the second evaporator 220 respectively.

[0079] In this embodiment, the shut-off valve 300 can be a straight-through type, a direct-flow type, an angle type, an electric flange type, etc. The shut-off valve 300 is located on the inlet side of the second evaporator 220. When the second drying subsystem 200 is started, the shut-off valve 300 is opened so that the refrigerant flows through the second evaporator 220 to dehumidify the desorption air. When the second drying subsystem 200 is shut down, the shut-off valve 300 is closed, and the refrigerant does not flow to the second evaporator 220, but flows entirely to the first evaporator 130 so that the first evaporator 130 dehumidifies the drying air.

[0080] The technical solution provided in this application provides that by connecting the second drying subsystem 200 and the first drying subsystem 100 in parallel in the refrigerant circulation path L10 and setting a shut-off valve 300, the refrigerant can be selectively allowed to flow through or not flow through the second evaporator 220. When the second drying subsystem 200 is shut down, the shut-off valve 300 is closed, and the refrigerant does not need to flow through the non-working second evaporator 220 and can flow directly into the first evaporator 130, thereby optimizing the refrigerant circulation path.

[0081] To improve the dehumidification effect of the second evaporator 220 and the first evaporator 130, refer to Figure 2 and Figure 3 In some possible embodiments of this application, the drying system further includes a throttle valve 400, and along the refrigerant circulation path L10, the compressor 110, condenser 120, throttle valve 400, second evaporator 220 and first evaporator 130 are arranged in sequence.

[0082] In this embodiment, the throttle valve 400 can be a needle type, ball type, butterfly type, nozzle type, etc., and for example, the throttle valve 400 is an expansion valve. The throttle valve 400 disperses the refrigerant to reduce pressure and temperature by changing the throttling area. The throttle valve 400 can be provided on the inlet side of the first evaporator 130 and / or the second evaporator 220.

[0083] In one example, compressor 110, condenser 120, throttle 400, second evaporator 220 and first evaporator 130 are arranged sequentially along refrigerant circulation path L10. The refrigerant passing through condenser 120 is cooled and depressurized by throttle 400 and then flows into second evaporator 220 and / or first evaporator 130 to absorb heat in second evaporator 220 and / or first evaporator 130.

[0084] The technical solution provided in this application embodiment, by setting a throttle 400 in the refrigerant circulation path L10, and the throttle 400 being located before the second evaporator 220 and the first evaporator 130, can reduce the pressure and temperature of the refrigerant through the throttle 400, so that the refrigerant in the second evaporator 220 and the first evaporator 130 has a lower temperature, thereby improving the dehumidification effect of the second evaporator 220 and the first evaporator 130.

[0085] To improve drying efficiency, refer to Figure 2 and Figure 3 In some possible embodiments of this application, the first drying subsystem 100 further includes a first fan 140, which is used to provide the circulation power of the drying air in the drying air circulation path L20; the second drying subsystem 200 further includes a second fan 230, which is used to provide the circulation power of the desorption air in the desorption air circulation path L30.

[0086] In this embodiment, the first fan 140 can be an axial flow fan, a centrifugal fan, a cross-flow fan, etc., and the second fan 230 can be the same as or different from the first fan 140. It is understood that the drying air circulation path L20 and the desorption air circulation path L30 are set in two independent air ducts, with the drying air driven by the first fan 140 and the desorption air driven by the second fan 230.

[0087] The technical solution provided in this application embodiment can improve the flow rate of drying air and desorption air by setting the first fan 140 and the second fan 230, thereby improving the water vapor exchange efficiency between the drying air and the material to be dried, as well as the water vapor exchange efficiency between the desorption air and the moisture absorption and dehumidification device 210, so that the moisture absorption and dehumidification device 210 can be quickly regenerated. Both can effectively improve the drying efficiency.

[0088] In order to improve the regeneration efficiency of the dehumidification device 210, refer to Figure 2 and Figure 3 In some possible embodiments of this application, the dehumidification device 210 includes a dehumidification turntable 211, and the regeneration device further includes a heater 212. The dehumidification turntable 211 is used to adsorb water vapor in the drying air circulation path L20, and the heater 212 is used to desorb the water vapor adsorbed by the dehumidification turntable 211 to the desorption air circulation path L30.

[0089] In this embodiment, the dehumidification device 210 can be a dehumidification turntable 211, which is a honeycomb or corrugated turntable carrying a desiccant. It can adsorb and desorb absorbed water vapor to achieve repeated desorption and regeneration. The desiccant can be zeolite, modified / synthetic zeolite, polymeric desiccant, alkali metal aluminosilicate, lithium chloride, silica gel, modified silica gel, activated alumina, etc.

[0090] In this embodiment, the dehumidifying rotary table 211 is driven to rotate by a drive structure, causing its various parts to move between a drying zone and a regeneration zone. Corresponding to the portion of the dehumidifying rotary table 211 that rotates to the drying zone, the desiccant adsorbs moisture from the drying air; corresponding to the portion of the dehumidifying rotary table 211 that rotates to the regeneration zone, the desorption air desorbs moisture from the desiccant. As the dehumidifying rotary table 211 rotates, the desiccant on it circulates between the drying zone and the regeneration zone to achieve dehumidification of the drying air or regeneration with the desorption air.

[0091] In this embodiment, the heater 212 is disposed in the regeneration area. The heater 212 can be electrically heated, such as a heating wire or a thermistor. The heater 212 can also be a heat pump type, infrared type, magnetoelectric type, etc., and this embodiment does not limit the type.

[0092] The technical solution provided in this application embodiment is that the dehumidification disc 211 of the dehumidification device 210 can adsorb water vapor in the drying air to dry the drying air. The heater 212 can heat the dehumidification disc 211 to quickly evaporate the water vapor adsorbed by the dehumidification disc 211 into the desorption air, thereby reducing the water vapor content in the dehumidification disc 211 and completing the regeneration of the dehumidification disc 211, which has a high regeneration efficiency.

[0093] To facilitate drying of the items to be dried, refer to... Figure 2 and Figure 3 In some possible embodiments of this application, the drying system further includes a drying cylinder 500, which is used to hold the object to be dried. Along the drying air circulation path L20, the first evaporator 130, the moisture absorption and dehumidification device 210, the condenser 120 and the drying cylinder 500 are arranged in sequence.

[0094] In this embodiment, drying air passes through the drying cylinder 500, transferring heat to the items to be dried within the drying cylinder 500 and carrying away the vaporized water vapor from the items, thereby drying the items. The drying cylinder 500 can be a drum, and by tumbling the items to be dried, the drying efficiency can be further improved.

[0095] In this embodiment of the application, when the first evaporator 130, the moisture absorption and dehumidification device 210, the condenser 120 and the drying cylinder 500 are sequentially arranged on the drying air circulation path L20, the drying air can be dehumidified by the first evaporator 130 alone; the drying air can also be dehumidified by the first evaporator 130 and the moisture absorption and dehumidification device 210 in sequence, and become drier.

[0096] The technical solution provided in this application embodiment uses a drying cylinder 500 to hold the items to be dried. The drying air is dehumidified by the first evaporator 130, dehumidified a second time by the moisture absorption and dehumidification device 210, and then heated by the condenser 120 to become high-temperature and high-dryness drying air, so as to quickly dry the items to be dried.

[0097] In the embodiments of this application, such as Figure 2 and Figure 3 As shown, the dryer provided in this embodiment of the application also includes a cooling fan 30, the air outlet of which faces the compressor 110, for forced convection cooling of the compressor 110. The rotation speed of the cooling fan 30 can be adjusted, thereby adjusting the cooling airflow delivered to the compressor 110. For example, the airflow of the cooling fan 30 can be adjusted by adjusting its rotation speed.

[0098] Figure 4 This is a circuit connection diagram of the cooling fan 30 provided in an embodiment of this application. Figures 1-4As shown, the dryer provided in this embodiment of the application also includes a control device 40, which is electrically connected to the cooling fan 30 and is used to control the cooling fan 30.

[0099] In some examples, the control device 40 may be any electronic component (e.g., circuit), chip, controller, or processor capable of performing control functions, such as an electronic control unit (ECU), microcontroller unit (MCU), programmable logic controller (PLC).

[0100] like Figure 4 As shown, the control device 40 is electrically connected to the cooling fan 30 through the VCC line, GND line, PWM line and FG line to realize the power supply and control of the cooling fan 30.

[0101] In this circuit, the VCC line represents "voltage input" or "positive voltage." The VCC line is used to connect to the positive terminal of the DC power supply (i.e., the power output terminal of the control device 40) to power the cooling fan 30. The GND line is used to connect to the negative terminal of the DC power supply. The GND line, or ground line, typically represents the negative terminal or zero potential point in the circuit. It is a necessary part of the current loop, ensuring that electrical energy can flow from one point (positive) to another point (negative), thereby driving the fan.

[0102] PWM stands for Pulse Width Modulation, and the PWM line is used to send speed control signals to the cooling fan 30. PWM speed control adjusts the average voltage across the motor by controlling the duty cycle of the pulse signal, thereby affecting the motor speed. Specifically, the duty cycle refers to the proportion of high-level time within a pulse cycle. When the duty cycle is large, the average voltage across the motor is high, resulting in a faster motor speed; conversely, when the duty cycle is small, the average voltage is low, and the motor speed is slow.

[0103] Simply put, to make the fan spin faster, you can increase the duty cycle of the PWM signal; to make the fan spin slower, you can decrease the duty cycle. Here, the PWM line is the key signal line for controlling the fan speed.

[0104] In the FG line, FG stands for Frequency Generation. The FG line is used to output the actual rotational speed of the cooling fan 30. For example, the cooling fan 30 may contain a sensor that generates a signal proportional to its rotational speed when it rotates. This signal is transmitted back to the control device 40 via the FG line, allowing the control device 40 to know the current rotational speed of the cooling fan 30. In this way, the control device 40 can adjust the PWM signal as needed to maintain the cooling fan 30 operating at a set speed.

[0105] like Figure 4 As shown in the embodiment of this application, the dryer also includes a temperature sensor 50. The temperature sensor 50 is used to detect the exhaust temperature of the compressor 11 or compressor 110. The temperature sensor 50 can be set at, for example, the exhaust port of the compressor 11 or compressor 110, or near the exhaust port. The temperature sensor 50 is electrically connected to the control device 40 and can send the temperature value detected by the temperature sensor 50 to the control device 40. In this embodiment of the application, the control device 40 can further control the cooling fan 30 according to the temperature value, for example, increasing or decreasing the speed of the cooling fan 30. The relevant control logic will be described in detail below.

[0106] In some examples, temperature sensor 50 can be a thermocouple, a thermistor, a resistance temperature detector (RTD), or an infrared temperature sensor, but is not limited to these. Temperature sensor 50 can periodically detect and report the exhaust temperature of compressor 11.

[0107] based on Figures 1-4 The dryer shown, combined with the control method for the cooling fan of the dryer provided in the embodiments of this application, will be further analyzed and solved in detail below to address the technical problems raised in this application.

[0108] See appendix Figure 5 , Figure 5 This is a flowchart of a control method 600 for a clothes dryer's cooling fan provided in an embodiment of this application. The clothes dryer includes a compressor and a cooling fan for dissipating heat from the compressor. The clothes dryer can be, for example, the aforementioned embodiment (…). Figures 1-4 The dryer provided can be controlled by a control device, such as the aforementioned control device 40, through which the control method 600 is executed. Figure 5 As shown, the control method 600 includes steps 610 to 640.

[0109] Step 610: After the cooling fan has been running at the current speed for a first duration, the control device obtains the exhaust temperature of the compressor.

[0110] In this step, the control device controls the cooling fan to start operating at a fixed speed (e.g., a first speed) and starts timing (e.g., a timer is activated). Once the cooling fan has been running at this fixed speed for a preset first duration, the control device acquires the compressor's exhaust temperature. Acquiring the compressor's exhaust temperature only after the cooling fan has run for the first duration ensures that the cooling fan's current heat dissipation capacity is fully utilized. The detected exhaust temperature at this time accurately reflects the compressor's thermal load status or heat dissipation requirements, that is, it accurately reflects whether the cooling fan's current speed is sufficient to meet the heat dissipation needs. For example, this first duration could be 5 seconds, 10 seconds, 15 seconds, 20 seconds, 24 seconds, or 30 seconds, but is not limited to these.

[0111] For example, the control device obtains the compressor's exhaust temperature through a temperature sensor. For instance, the control device receives a detection signal from the temperature sensor, processes the signal using algorithms such as filtering, amplification, and feature extraction, and then obtains the compressor's exhaust temperature.

[0112] In some examples, such as Figures 1-4 As shown, after the cooling fan has been running at the current speed for a first period of time, the control device obtains the exhaust temperature of the compressor. This can be achieved by the control device 40 obtaining the exhaust temperature of the compressor 11 or compressor 110 through the temperature sensor 50 after the cooling fan 30 has been running at the current speed for 20 seconds.

[0113] Step 620: The control device determines whether the compressor's exhaust temperature is within a preset temperature range. If not, proceed to step 630.

[0114] In this step, the preset temperature range can be a continuous temperature range, including a minimum temperature value (i.e., the lower limit) and a maximum temperature value (i.e., the upper limit). The exhaust temperature value within this temperature range can be considered a reasonable temperature value. If the control device determines that the compressor's exhaust temperature is within this temperature range, it means that the cooling fan speed is reasonable and no adjustment is needed.

[0115] If the control device determines that the compressor's exhaust temperature is not (or is not) within the temperature range, for example, if the exhaust temperature is lower than the lower limit of the temperature range (i.e., the exhaust temperature is too low) or higher than the upper limit of the temperature range (i.e., the exhaust temperature is too high), it means that the speed of the cooling fan is unreasonable at this time, that is, the speed of the cooling fan needs to be adjusted to accurately match the cooling requirements of the compressor.

[0116] In some examples, the compressor has a desired ideal exhaust temperature value, and the temperature range can be determined based on this ideal exhaust temperature value. For instance, the ideal exhaust temperature value can be adjusted upwards or downwards by a certain amount to obtain this temperature range. For example, the ideal exhaust temperature value can be any value between 65 and 95°C, such as 68°C, 70°C, 75°C, 78°C, 82°C, 83°C, 85°C, 88°C, or 90°C, etc. The temperature range can be (68±1)°C, (70±1)°C, (75±1)°C, (80±2)°C, (83±1)°C, (85±1)°C, (85±2)°C, 87–90°C (corresponding to an ideal exhaust temperature of 88°C), etc., but is not limited to these.

[0117] Step 630: If the compressor's exhaust temperature is not within the preset temperature range, the control device adjusts the speed of the cooling fan according to the compressor's exhaust temperature.

[0118] In this step, if the compressor's exhaust temperature is not within the preset temperature range, it indicates that the current exhaust temperature is unreasonable, such as being too high or too low. Therefore, the speed of the cooling fan should be adjusted. For example, if the exhaust temperature is lower than the lower limit of the temperature range (i.e., the exhaust temperature is too low), it indicates that the compressor is overheating, so the speed of the cooling fan should be reduced; if the exhaust temperature is higher than the upper limit of the temperature range (i.e., the exhaust temperature is too high), it indicates that the compressor is underheating, so the speed of the cooling fan should be increased.

[0119] Repeat steps 610, 620 and 630 until the exhaust temperature of the compressor is within the temperature range.

[0120] In other words, considering that a single adjustment may not be sufficient to bring the compressor's exhaust temperature to a reasonable temperature range (i.e., it is difficult to adjust it to the correct temperature range in one go), the control method 300 provided in this application embodiment can achieve continuous multiple adjustments to the cooling fan speed. The previous adjustment result can be used as feedback and basis to perform the next speed adjustment until the compressor's exhaust temperature is within a preset range.

[0121] According to the control method 600 for a dryer cooling fan provided in this application, the exhaust temperature is detected after the cooling fan has been running at its current speed for a period of time. This allows the detected exhaust temperature to more accurately reflect the compressor's thermal load or cooling requirements. If the detected exhaust temperature is not within the preset temperature range, it indicates that the current speed of the cooling fan is unreasonable, such as insufficient or excessive cooling, and therefore the fan speed needs to be adjusted. This application can continuously adjust the cooling fan speed in multiple steps, using the previous adjustment result as feedback and a basis for the next speed adjustment, until the compressor's exhaust temperature is within the preset range.

[0122] This application dynamically adjusts the speed of the cooling fan, achieving precise control of the compressor exhaust temperature. This ensures the compressor exhaust temperature remains within a safe and ideal range, avoiding overheating and clothing damage caused by excessively high exhaust temperatures, while also preventing reduced drying efficiency and prolonged drying time due to excessively low exhaust temperatures. This application solves the problem in existing dryers where the cooling fan cannot accurately control the compressor's cooling effect, improving the dryer's operational stability and safety, optimizing drying efficiency, reducing energy consumption, and providing users with a more efficient, energy-saving, and safe clothes drying experience.

[0123] In some examples, the cooling fan has multiple speed settings. In step 630 above, the control device adjusts the speed of the cooling fan according to the exhaust temperature of the compressor, which may be: adjusting or switching the speed settings of the cooling fan.

[0124] In some examples, step 630 above, in which the control device adjusts the speed of the cooling fan according to the compressor's exhaust temperature, can be:

[0125] Adjusting the duty cycle of the PWM signal for the cooling fan and / or the power supply voltage for the cooling fan allows for speed regulation of the cooling fan.

[0126] By adjusting the duty cycle of the cooling fan's PWM signal and / or its supply voltage, fine-tuning of the cooling fan's speed can be achieved, such as stepless speed regulation. This adjustment method not only has a fast response time but also allows for flexible adjustment of the fan speed as needed, enabling better control of the compressor's exhaust temperature.

[0127] like Figure 5 As shown, if in step 620 the control device determines that the compressor's exhaust temperature is within the preset temperature range, the control method 600 provided in this embodiment further includes:

[0128] Step 640: The control device controls the cooling fan to continue running at the current speed.

[0129] When the compressor's exhaust temperature is already within the preset temperature range, the cooling fan continues to run at its current speed without any additional adjustments. This reduces unnecessary control operations, improves system reliability, and helps extend the lifespan of the cooling fan.

[0130] The following is combined with Figures 1-5 The content shown is illustrated with a specific example to illustrate the control method 600 provided in the embodiments of this application:

[0131] In step 610, after the cooling fan 30 has been running continuously at its current speed (denoted as the first speed) for a first duration, the control device 40 obtains the exhaust temperature of the compressor 11 or compressor 110 (denoted as the first temperature value) through the temperature sensor 50. In step 620, the control device 40 determines whether the first temperature value is within a preset temperature range. If so, the process proceeds to step 640, whereby the control device 40 controls the cooling fan 30 to continue operating at the first speed. If not, the process proceeds to step 630. In step 630, the control device 40 adjusts the speed of the cooling fan 30 from the first speed to the second speed. The aforementioned steps are then repeated.

[0132] Further, in step 610, after the cooling fan 30 has been running continuously at the second speed for a first duration, the control device 40 again acquires the exhaust temperature of the compressor 11 or compressor 110 (referred to as the second temperature value). In step 620, the control device 40 determines whether the second temperature value is within a preset temperature range. If so, it proceeds to step 640, whereby the control device 40 controls the cooling fan 30 to continue operating at the second speed, meaning the speed adjustment is complete, and the cooling fan 30 continues to operate at the second speed. If not, it proceeds to step 630 again. In step 630, the control device adjusts the cooling fan speed again based on the exhaust temperature.

[0133] In step 630, the control device 40 adjusts the speed again, changing the speed of the cooling fan 30 from the second speed to the third speed. Then, the aforementioned steps are repeated until the exhaust temperature of the compressor 11 or compressor 110 is within a preset range, at which point the speed adjustment stops. In other words, the speed at the last adjusted speed (i.e., the speed at which the exhaust temperature of the compressor 11 or compressor 110 was determined to be within the preset range, for example, the third speed) is used as the subsequent operating speed of the cooling fan 30.

[0134] Figure 6This is a flowchart of the control method 700 for the cooling fan of a clothes dryer provided in this application. Control method 700 can be considered a specific and lower-level implementation of the aforementioned control method 600, such as... Figure 6 As shown, the control method 700 includes steps 710 to 760.

[0135] Step 710: The control device controls the compressor to start until the compressor's exhaust temperature reaches the ideal exhaust temperature value, and then controls the cooling fan to run at a preset initial speed.

[0136] After the compressor starts and reaches the ideal exhaust temperature, the cooling fan is then started and runs at a preset initial speed. This ensures that the cooling fan only starts working after the compressor is operating stably, avoiding unnecessary energy consumption and providing stable initial conditions for subsequent precise heat dissipation control.

[0137] In some examples, the preset initial speed can be determined based on parameters such as ambient temperature and the dryer's operating mode selected by the user, combined with built-in algorithm logic. This application does not impose any special limitations on the method of determining the preset initial speed. For example, the preset initial speed can be the average speed of the cooling fan during the dryer's last use. The initial duty cycle of the PWM signal corresponding to the preset initial speed can be an intermediate value, such as between 30% and 70%, like 40%, 50%, 55%, or 60%.

[0138] For example, considering the actual temperature measurement accuracy, the compressor's exhaust temperature reaching the ideal exhaust temperature value can be equal to or approximately equal to the ideal exhaust temperature value, for example, it can be slightly less than or slightly greater than the ideal exhaust temperature value.

[0139] Step 720: After the cooling fan has been running continuously at the current speed (i.e., the preset initial speed) for a first duration, the control device obtains the exhaust temperature of the compressor.

[0140] In step 730, the control device determines whether the compressor's exhaust temperature is within a preset temperature range. If not, proceed to step 740 or 750. If yes, proceed to step 760, where the control device controls the cooling fan to continue operating at the current speed (i.e., the preset initial speed).

[0141] Specifically, if the compressor's discharge temperature is outside the preset temperature range, there are two possibilities: the compressor's discharge temperature may be lower than the lower limit of the temperature range, or higher than the upper limit of the temperature range. If the compressor's discharge temperature is lower than the lower limit of the temperature range, proceed to step 740; if the compressor's discharge temperature is higher than the upper limit of the temperature range, proceed to step 750. Steps 740 and 750 can be seen as specific implementations or sub-steps of the aforementioned step 630.

[0142] Step 740: If the compressor's exhaust temperature is less than the lower limit of the temperature range, the control device controls the cooling fan to stop running (duty cycle 0%) until the compressor's exhaust temperature reaches the preset ideal exhaust temperature value, and then controls the cooling fan to run with the second duty cycle; wherein, the second duty cycle is obtained by reducing the first duty cycle corresponding to the current speed (i.e., the preset initial speed) by one step, and the ideal exhaust temperature value is within the temperature range.

[0143] When the compressor's exhaust temperature is below the lower limit of this temperature range, it indicates that the exhaust temperature is too low. In this case, the cooling fan should be stopped first to ensure that the exhaust temperature can quickly recover to a reasonable range. This can prevent problems such as low drying efficiency caused by prolonged low exhaust temperature.

[0144] Once the exhaust temperature gradually rises to the preset ideal exhaust temperature value, the cooling fan can be restarted with a small duty cycle, and its speed gradually reduced in a step-by-step manner until the compressor's exhaust temperature is stably maintained within a reasonable range. This application allows for flexible adjustment of the fan speed as needed, enabling fine-tuning of the cooling fan speed and better control of the compressor's exhaust temperature.

[0145] For example, a step size here can be 0.5% to 20%, such as 1%, 2%, 3%, 5%, or 10%. The first duty cycle corresponding to the preset initial speed (i.e., the aforementioned initial duty cycle) can be, for example, 60%, and a step size here can be, for example, 3%. Then, the second duty cycle is 57%. That is, in step 740, the cooling fan stops running until the compressor's exhaust temperature reaches the preset ideal exhaust temperature value, after which the control device will control the cooling fan to run at a duty cycle of 57%.

[0146] Furthermore, if, after controlling the cooling fan to run at a 57% duty cycle for the first period of time, the detected exhaust temperature is still lower than the lower limit of the temperature range, then step 740 is executed again. That is, the control device first stops the cooling fan until the compressor's exhaust temperature reaches the preset ideal exhaust temperature value, after which the control device controls the cooling fan to run at a 54% duty cycle. The aforementioned process (cyclic steps) then continues until the compressor's exhaust temperature is within the preset temperature range.

[0147] Step 750: If the compressor's exhaust temperature is greater than the upper limit of the temperature range, the control device controls the cooling fan to run at full speed (duty cycle 100%) until the compressor's exhaust temperature drops to the ideal exhaust temperature value. Then, the cooling fan is controlled to run at a third duty cycle, which is obtained by adding a step size to the first duty cycle.

[0148] When the compressor's exhaust temperature exceeds the upper limit of this temperature range, it indicates that the exhaust temperature is too high. In this case, you should first control the cooling fan to run at full speed to ensure that the exhaust temperature can quickly drop to a reasonable range. This can prevent problems such as overheating protection and damage to clothing caused by prolonged excessively high exhaust temperatures.

[0149] Once the exhaust temperature gradually drops to the preset ideal exhaust temperature value, the cooling fan can be restarted with a larger duty cycle, and the fan speed can be gradually increased in a stepwise manner until the compressor's exhaust temperature is stably maintained within a reasonable range. This application allows for flexible adjustment of the fan speed as needed, enabling fine-tuning of the cooling fan speed and better control of the compressor's exhaust temperature.

[0150] For example, the first duty cycle corresponding to the preset initial speed (i.e., the aforementioned initial duty cycle) can be 60%, and a step size can be 3%, so the third duty cycle is 63%. That is, in step 750, the cooling fan runs at full speed until the compressor's exhaust temperature drops to the ideal exhaust temperature value, after which the control device will control the cooling fan to run at a duty cycle of 63%.

[0151] Furthermore, if, after controlling the cooling fan to run at a 63% duty cycle for the first period of time, the detected exhaust temperature is still higher than the upper limit of the temperature range, then step 750 is executed again. That is, the control device first controls the cooling fan to run at full speed until the compressor's exhaust temperature drops to the ideal exhaust temperature value. Then, the control device controls the cooling fan to run at a 66% duty cycle. The aforementioned process (cyclic steps) continues until the compressor's exhaust temperature is within the preset temperature range.

[0152] For example, considering the actual temperature measurement accuracy, the compressor's exhaust temperature is reduced to the ideal exhaust temperature value. This means that the compressor's exhaust temperature is equal to or approximately equal to the ideal exhaust temperature value. For example, it may be slightly less than or slightly greater than the ideal exhaust temperature value.

[0153] The above text combined Figures 1 to 6 The control method for the cooling fan of a clothes dryer provided in the embodiments of this application is described in detail below. Figure 7 , Figure 8 This application describes a control device for a clothes dryer's cooling fan provided in an embodiment. It should be understood that... Figure 7 , Figure 8 The control device shown can achieve Figure 5 or Figure 6 The steps shown in the method flow are one or more. To avoid repetition, they will not be described in detail here.

[0154] Figure 7 This is a schematic block diagram of a control device 800 for a clothes dryer's cooling fan provided in an embodiment of this application. The clothes dryer includes a compressor and a cooling fan for cooling the compressor. Figure 7 As shown, the control device 800 includes an acquisition unit 810, a determination unit 820, and a control unit 830.

[0155] The acquisition unit 810 is used to acquire the exhaust temperature of the compressor after the cooling fan has been running continuously at the current speed for a first duration.

[0156] The determining unit 820 is used to determine whether the exhaust temperature of the compressor is within a preset temperature range;

[0157] The control unit 830 is used to adjust the speed of the cooling fan according to the exhaust temperature of the compressor when the exhaust temperature of the compressor is not within the temperature range.

[0158] Repeat the steps of obtaining the compressor's exhaust temperature and adjusting the speed of the cooling fan based on the compressor's exhaust temperature until the compressor's exhaust temperature is within the specified temperature range.

[0159] In some examples, the control unit 830 is specifically used to adjust the duty cycle and / or supply voltage of the PWM signal of the cooling fan to achieve speed regulation of the cooling fan.

[0160] In some examples, if the exhaust temperature of the compressor is less than the lower limit of the temperature range, the control unit 830 is specifically used to: control the cooling fan to stop running until the exhaust temperature of the compressor reaches the ideal exhaust temperature value, and then control the cooling fan to run with a second duty cycle; wherein the second duty cycle is obtained by reducing the first duty cycle corresponding to the current speed by one step, and the ideal exhaust temperature value is within the temperature range.

[0161] In some examples, if the exhaust temperature of the compressor is greater than the upper limit of the temperature range, the control unit 830 is specifically used to: control the cooling fan to run at full speed until the exhaust temperature of the compressor drops to the ideal exhaust temperature value, and then control the cooling fan to run with a third duty cycle, wherein the third duty cycle is obtained by adding a step to the first duty cycle.

[0162] In some examples, the control unit 830 is also used to: control the compressor to start, and control the cooling fan to run at a preset initial speed after the compressor's exhaust temperature reaches the ideal exhaust temperature value.

[0163] In some examples, if it is determined that the exhaust temperature of the compressor is within the temperature range, the control unit 830 is further configured to: control the cooling fan to continue operating at the current speed.

[0164] Specifically, the control device 800 may correspond to the control device in the control method 600 and control method 700 according to the embodiments of this application. The control device 800 may include a device for performing... Figure 5 or Figure 6 Each unit of the method executed by the control device 800. Furthermore, each unit in the control device 800 and the other operations and / or functions described above are respectively for implementing the corresponding processes of control method 600 and control method 700. The specific process of each unit executing the above-mentioned corresponding steps has been described in detail in control method 600 and control method 700, and will not be repeated here for the sake of brevity.

[0165] This application embodiment also provides a control device 900 for the cooling fan of a clothes dryer. Figure 8 This is a structural block diagram of the control device 900 for the cooling fan of a clothes dryer provided in an embodiment of this application. Figure 8 As shown, the control device 900 includes a processor 910 and a memory 920, and the above-mentioned devices can be connected through one or more buses 930.

[0166] The control device 900 also includes a computer program 921, which is stored in the memory 920. When the computer program 921 is executed by the processor 910, the control device 900 performs the aforementioned actions. Figure 5 The control method shown is 600 or Figure 6 The control method 700 is shown. All relevant details of each step in the above method embodiment can be found in the functional description of the corresponding physical device, and will not be repeated here.

[0167] This application also provides a computer-readable storage medium including a computer program that, when run on a computer, causes the computer to perform the methods provided in the above-described method embodiments.

[0168] This application also provides a computer program product, including: computer program code, which, when run on an electronic device, causes the electronic device to execute the method provided in the above-described method embodiments.

[0169] This application also provides a chip system including a memory and a processor. The memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that an electronic device equipped with the chip system performs the method provided in the above-described method embodiments.

[0170] The chip system may include input circuits or interfaces for transmitting information or data, and output circuits or interfaces for receiving information or data.

[0171] It should be understood that in the embodiments of this application, the processor can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0172] It should also be understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0173] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0174] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0175] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0176] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0177] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0178] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several 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 methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0179] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for controlling the cooling fan of a clothes dryer, characterized in that, The clothes dryer includes a compressor and a cooling fan for dissipating heat from the compressor, and the control method includes: After the cooling fan has been running continuously at the current speed for a first duration, the exhaust temperature of the compressor is obtained; Determine whether the exhaust temperature of the compressor is within a preset temperature range; If not, adjust the speed of the cooling fan according to the exhaust temperature of the compressor; Repeat the steps of obtaining the compressor's exhaust temperature and adjusting the speed of the cooling fan based on the compressor's exhaust temperature until the compressor's exhaust temperature is within the specified temperature range.

2. The control method according to claim 1, characterized in that, The step of adjusting the speed of the cooling fan according to the exhaust temperature of the compressor includes: The duty cycle and / or power supply voltage of the PWM signal of the cooling fan are adjusted to regulate the speed of the cooling fan.

3. The control method according to claim 2, characterized in that, If the exhaust temperature of the compressor is lower than the lower limit of the temperature range, adjusting the speed of the cooling fan according to the exhaust temperature of the compressor includes: The cooling fan is controlled to stop running until the exhaust temperature of the compressor reaches the ideal exhaust temperature value, and then the cooling fan is controlled to run with a second duty cycle. The second duty cycle is obtained by reducing the first duty cycle corresponding to the current speed by one step, and the ideal exhaust temperature value is within the temperature range.

4. The control method according to claim 3, characterized in that, If the exhaust temperature of the compressor is greater than the upper limit of the temperature range, adjusting the speed of the cooling fan according to the exhaust temperature of the compressor includes: The cooling fan is controlled to run at full speed until the exhaust temperature of the compressor drops to the ideal exhaust temperature value. Then, the cooling fan is controlled to run at a third duty cycle, which is obtained by adding a step to the first duty cycle.

5. The control method according to claim 3 or 4, characterized in that, Before obtaining the discharge temperature of the compressor, the control method further includes: The compressor is started and then controlled to run at a preset initial speed until the compressor's exhaust temperature reaches the ideal exhaust temperature value.

6. The control method according to any one of claims 1-3, characterized in that, If it is determined that the exhaust temperature of the compressor is within the temperature range, the control method further includes: Control the cooling fan to continue running at the current speed.

7. A control device for a clothes dryer's cooling fan, characterized in that, The dryer includes a compressor and a cooling fan for cooling the compressor, and the control device includes: The acquisition unit is used to acquire the exhaust temperature of the compressor after the cooling fan has been running continuously at the current speed for a first duration; A determining unit is used to determine whether the exhaust temperature of the compressor is within a preset temperature range; A control unit is configured to adjust the speed of the cooling fan according to the exhaust temperature of the compressor when the exhaust temperature of the compressor is not within the specified temperature range. Repeat the steps of obtaining the compressor's exhaust temperature and adjusting the speed of the cooling fan based on the compressor's exhaust temperature until the compressor's exhaust temperature is within the specified temperature range.

8. A control device for a clothes dryer's cooling fan, characterized in that, The dryer includes a compressor and a cooling fan for cooling the compressor, and the control device includes: processor; Memory; And a computer program, which is stored in the memory, and when the computer program is executed by the processor, causes the control device to perform the control method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed on an electronic device, causes the electronic device to perform the control method as described in any one of claims 1-6.

10. A clothes dryer, characterized in that, include: compressor; A cooling fan is used to dissipate heat from the compressor; A temperature sensor is used to detect the exhaust temperature of the compressor and send the exhaust temperature of the compressor to the control device; The control device is the control device as described in claim 7 or 8.

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