Clothes dryer

Abstract

The embodiment of the invention provides a clothes dryer. The clothes dryer comprises a box body; the roller and the heat pump system are arranged in the box body, and the heat pump system is used for conveying heated air into the roller; the driving motor is used for providing rotating power for the roller; the controller is electrically connected with the driving motor and the heat pump system, and the controller is configured to execute the following steps that in response to a preset clothes drying instruction, the roller is controlled to rotate at a preset rotating speed; under the condition that the roller rotates at the preset rotating speed, the output power of the driving motor is obtained; determining the load condition of the roller according to the output power; and the clothes in the roller are dried according to the load condition. Therefore, compared with the mode that clothes in the clothes dryer are dried through the same drying program all the time, the clothes in the roller can be dried differently according to different load conditions of the roller, the drying energy consumption of the clothes dryer is reduced, and therefore the energy efficiency of the clothes dryer is improved.

Description

Technical Field

[0001] This application relates to the technical field of clothes dryers, and in particular, to a clothes dryer. Background Art

[0002] A clothes dryer is a household appliance used to dry wet clothes. The clothes dryer heats fresh cold air into dry hot air through a heat pump device, and then uses the dry hot air to exchange heat with the clothes tumbling in the drum, so that the moisture contained in the clothes in the drum gradually evaporates under the sufficient heat exchange between the dry hot air, thus realizing the drying of the clothes.

[0003] In the related art, the clothes dryer always uses the same drying program to dry the clothes in the dryer. In the case of fewer clothes, it may cause the moisture contained in the clothes to evaporate completely, but the dryer is still continuing to execute the drying program, increasing the energy consumption of the dryer, thereby reducing the drying energy efficiency of the dryer.

[0004] Therefore, there is an urgent need for a clothes dryer that can improve the drying energy efficiency. Summary of the Invention

[0005] To solve the above technical problems, an embodiment of the present application provides a clothes dryer.

[0006] According to one aspect of the embodiments of the present application, an embodiment of the present application provides a clothes dryer, including: a cabinet; a drum and a heat pump system disposed in the cabinet, the heat pump system being configured to deliver heated air into the drum; a drive motor configured to provide rotational power to the drum; and a controller electrically connected to the drive motor and the heat pump system, the controller being configured to perform the following steps: in response to a preset clothes drying instruction, controlling the drum to rotate at a preset speed; when the drum rotates at the preset speed, obtaining the output power of the drive motor; determining the load condition of the drum according to the output power; and drying the clothes in the drum according to the load condition.

[0007] In the above embodiments, in response to a preset clothing drying instruction, the drum is controlled to rotate at a preset speed. Then, when the drum rotates at the preset speed, the output power of the drive motor is obtained, and the load condition of the drum is determined according to the output power; the clothing in the drum is dried according to the load condition. In this way, compared with always drying the clothing in the dryer using the same drying program, in this application, the load condition of the drum is determined based on the output power of the drive motor when the drum rotates at a preset speed, and then the clothing in the drum is dried according to the load condition, so that the clothing in the drum can be dried differently according to the different load conditions of the drum, reducing the situation that the dryer continues to execute the drying program after the moisture contained in the clothing has evaporated, reducing the drying energy consumption of the dryer, and thus improving the energy efficiency of the dryer.

[0008] In an embodiment of the present application, based on the foregoing solution, when the drum rotates at a preset speed, the gravity exerted on the clothing is greater than the centrifugal force exerted on the clothing.

[0009] In the above embodiments, since when the drum rotates at a preset speed, the gravity exerted on the clothing is greater than the centrifugal force exerted on the clothing, when the clothing rotates in the drum, it will not cling to the inner wall of the drum. The clothing as a whole rolls in the drum approximately in a cylindrical shape, which stabilizes the overall shape of the clothing while ensuring the stability of the motor speed, and reduces the situation where the force on the clothing changes due to the change in the clothing shape, resulting in a change in the output power of the drive motor, thereby increasing the accuracy of determining the load condition in the drum.

[0010] In an embodiment of the present application, based on the foregoing solution, the controller is further configured to perform the following steps: continuously obtain the output power of the drive motor within a preset duration.

[0011] In the above embodiments, by continuously obtaining the output power of the drive motor within a preset duration, it is convenient to obtain the power fluctuation value of the output power.

[0012] In an embodiment of the present application, based on the foregoing solution, the controller is further configured to perform the following steps: obtain the power fluctuation value of the output power; determine the load condition of the drum according to the power fluctuation value.

[0013] In the above embodiments, by obtaining the power fluctuation value of the output power and then determining the load condition of the drum according to the power fluctuation value, it is convenient to dry the clothing in the drum differently according to the different load conditions of the drum, thereby improving the energy efficiency of the dryer.

[0014] In one embodiment of the present application, based on the foregoing solution, the controller is further configured to perform the following steps: obtain a load reference power value according to a preset full-load power fluctuation value and a preset half-load power fluctuation value; determine the load condition of the drum according to the power fluctuation value and the load reference power value.

[0015] In the above embodiment, by obtaining a load reference power value according to a preset full-load power fluctuation value and a preset half-load power fluctuation value, and then determining the load condition of the drum accurately according to the power fluctuation value and the load reference power value, the accuracy of obtaining the load condition is improved.

[0016] In one embodiment of the present application, based on the foregoing solution, the controller is further configured to perform the following steps: obtain a power difference between the full-load power fluctuation value and the half-load power fluctuation value; determine the sum of half of the power difference and the half-load power fluctuation value as the load reference power value.

[0017] In the above embodiment, by obtaining a power difference between the full-load power fluctuation value and the half-load power fluctuation value, and then determining the sum of half of the power difference and the half-load power fluctuation value as the load reference power value, so as to accurately determine the load condition of the drum according to the load reference power value, and the accuracy of obtaining the load condition is improved.

[0018] In one embodiment of the present application, based on the foregoing solution, the load condition includes full load or half load; the controller is further configured to perform the following steps: when the power fluctuation value reaches above the load reference power value, determine that the load condition is full load; and / or, when the power fluctuation value reaches below the load reference power value, determine that the load condition is half load.

[0019] In the above embodiment, the load condition of the drum can be accurately determined as full load or half load through the magnitude relationship between the power fluctuation value and the load reference power value, so as to dry the clothes in the drum differently according to the different load conditions of the drum, thereby improving the energy efficiency of the dryer.

[0020] In one embodiment of the present application, based on the foregoing solution, the controller is further configured to perform the following steps: obtain a clothing drying rule corresponding to the load condition; control the drive motor and the heat pump system according to the clothing drying rule.

[0021] In the above embodiment, the drive motor and the heat pump system of the dryer can be controlled according to different clothing drying rules according to the different load conditions of the drum to dry the clothes in the drum, thereby improving the energy efficiency of the dryer.

[0022] In one embodiment of the present application, based on the foregoing solution, the controller is further configured to perform the following steps: perform a lookup operation in a preset drying rule database using the load condition to obtain the clothing drying rule corresponding to the load condition; the corresponding relationship between the load condition and the clothing drying rule is stored in the drying rule database.

[0023] In the above embodiment, the clothing drying rule corresponding to the load condition can be accurately obtained by using the preset drying rule database, so as to perform different drying on the clothes in the drum according to different load conditions of the drum, thereby improving the energy efficiency of the dryer.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0026] Figure 1 is a schematic diagram showing the circuit connection principle of a dryer shown in an exemplary embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of a dryer shown in an exemplary embodiment of the present application;

[0028] Figure 3 is a flowchart of steps executable by a controller in a dryer provided in an exemplary embodiment of the present application;

[0029] Figure 4 is a flowchart of steps for determining the load condition of a drum according to the output power provided in an exemplary embodiment;

[0030] Figure 5 is a flowchart of steps for determining the load condition of a drum according to the power fluctuation value provided in an exemplary embodiment;

[0031] Figure 6 is a flowchart of steps for drying clothes in a drum according to the load condition provided in an exemplary embodiment of the present application. BRIEF DESCRIPTION OF THE DRAWINGS:

[0033] 10: Dryer; 11: Cabinet; 12: Drum; 13: Driving motor; 14: Controller; 15: Belt; 16: Motor shaft; 17: Impeller; 18: Condenser; 19: Compressor; 20: Evaporator; 21: Heat pump system. Detailed implementation manners

[0034] Hereinafter, exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0035] The block diagrams shown in the drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or implemented in one or more hardware modules or integrated circuits, or implemented in different networks and / or processor devices and / or microcontroller devices.

[0036] The flowcharts shown in the drawings are merely exemplary descriptions and do not necessarily include all contents and operations / steps, nor do they necessarily need to be executed in the described order. For example, some operations / steps may be decomposed, while some operations / steps may be combined or partially combined. Therefore, the actual execution order may be changed according to the actual situation.

[0037] It should also be noted that: "a plurality of" mentioned in the present application means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0038] Terms such as "first", "second", "third", and "fourth" in the description and claims of the present application and the drawings thereof are used to distinguish different objects, rather than to describe a specific order. The terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0039] Currently, the way to control the dryer is to always use the same drying program to dry the clothes in the dryer. However, in the case of fewer clothes, it may cause the moisture contained in the clothes to evaporate completely, but the dryer continues to execute the drying program, increasing the energy consumption of the dryer and thus reducing the drying energy efficiency of the dryer.

[0040] To solve the above technical problems, the present application proposes a dryer that can improve the drying energy efficiency.

[0041] Please refer to Figure 1 and Figure 2 , Figure 1 which is a schematic diagram of the circuit connection principle of the dryer provided by an exemplary embodiment of the present application. Figure 2 which is a schematic diagram of the structure of the dryer provided by an exemplary embodiment of the present application. As Figure 1 shown, the dryer 10 includes a cabinet 11, a drum 12, a heat pump system 21, a drive motor 13, a controller 14, a belt 15, a motor shaft 16, and an impeller 17. Among them, the heat pump system includes: a condenser 18, a compressor 19, and an evaporator 20. The controller 14 is electrically connected to the drive motor 13 and the heat pump system 21 respectively.

[0042] Next, each part of the dryer 10 will be introduced one by one.

[0043] The cabinet 11 is the external structure of the dryer 10, which is used to fix and protect the internal components. The cabinet 11 is usually made of metal or plastic; usually, a door is also provided on the cabinet 11 for putting clothes into or taking them out of the drum 12, and the door is usually equipped with a sealing ring to prevent water leakage; usually, a display screen and a control panel are also provided on the cabinet 11, and there are buttons, knobs, or touch screens on the control panel. A bottom air duct is also provided at the bottom of the cabinet 11, and the bottom air duct is connected to the drum 12 through a first air duct and a second air duct for realizing the air circulation of the dryer. Among them, the first air duct is on the side of the cabinet near the door, that is, the front air duct, and the first air duct is used to introduce the wet air after drying the clothes into the bottom air duct; the second air duct is on the side of the cabinet away from the door, that is, the rear air duct, and the second air duct is used to introduce the dry air after heat exchange with the refrigerant into the drum.

[0044] A water storage tank is provided in the bottom air duct for storing the condensed water separated when the circulated air exchanges heat with the refrigerant.

[0045] The drum 12 is arranged inside the cabinet 11 and is usually made of stainless steel, which is used to accommodate the clothes to be dried and dry the clothes. It rotates to make the clothes evenly heated so as to remove the moisture in the clothes.

[0046] The heat pump system is arranged inside the box body 11 and is used to supply dry hot air into the drum. The heat pump system 21 includes a condenser 18, an evaporator 20 and a compressor 19. Among them, the condenser 18 and the evaporator 20 are arranged in the bottom air duct. The condenser 18, the evaporator 20 and the compressor 19 are connected to each other to form a refrigerant circulation loop. The condenser 18, the evaporator 20 and the compressor 19 heat and dry the fresh cold air through refrigerant circulation to obtain dry hot air.

[0047] The drive motor 13 is the power source of the dryer 10. The drive motor 13, the belt 15 and the drum 12 constitute a transmission system. One end of the belt 15 is sleeved on the drive motor 13, and the other end of the belt 15 is sleeved on the drum 12 through a pulley. When the drive motor 13 rotates, relying on the friction force generated when the belt and the pulley are tightened, the power of the drive motor 13 is transmitted to the drum 12 to realize the rotation of the drum. In this way, the dry hot air can fully mix and contact with the clothes in the turnover, improving the drying effect.

[0048] The drive motor 13, the motor shaft 16 and the impeller 17 constitute a gas power system.

[0049] The impeller 17 is connected to the drive motor 13 through the motor shaft 16; the impeller 17 is arranged in the second air duct; the drive motor 13 drives the impeller 17 to rotate in the second air duct through the motor shaft 16 to generate wind power, thereby increasing the rate of air circulation.

[0050] The controller 14 is electrically connected to the drive motor 13 and the heat pump system respectively. Please refer to Figure 3 , Figure 3 is a flowchart of steps executable by the controller in the dryer provided by an exemplary embodiment of the present application. The controller can be configured to directly execute the following steps S310 to step S340:

[0051] Step S310, in response to a preset clothes drying instruction, control the drum to rotate at a preset speed.

[0052] Step S320, when the drum rotates at a preset speed, obtain the output power of the drive motor.

[0053] Step S330, determine the load condition of the drum according to the output power.

[0054] Step S340, dry the clothes in the drum according to the load condition.

[0055] The following will describe these 4 steps in detail respectively.

[0056] In step S310, the preset clothing drying instruction is that after the user puts the clothes into the drum and presses the button representing the start of drying on the control panel of the cabinet, that is, the preset clothing drying instruction is sent to the dryer. Then, in response to this clothing drying instruction, the dryer starts the clothing drying program corresponding to this clothing drying instruction and controls the drum to rotate at a preset speed.

[0057] When the drum rotates at a preset speed, the gravity exerted on the clothes reaches above the centrifugal force exerted on the clothes. Further, the preset speed is the maximum speed of the drum when the gravity exerted on the clothes is greater than the centrifugal force exerted on the clothes. In this way, since when the drum rotates at a preset speed, the gravity exerted on the clothes reaches above the centrifugal force exerted on the clothes, when the clothes rotate in the drum, they will not cling to the barrel wall of the drum. The whole clothes are approximately cylindrical and roll in the drum, which stabilizes the overall shape of the clothes while ensuring the stability of the motor speed, and reduces the situation where the force on the clothes changes due to the change in the shape of the clothes, resulting in the change of the output power of the drive motor, thereby increasing the accuracy of determining the load condition in the drum.

[0058] In step S320, the controller is further configured to continuously obtain the output power of the drive motor within a preset duration. In this way, by continuously obtaining the output power of the drive motor within a preset duration, it is convenient to obtain the power fluctuation value of the output power.

[0059] In this embodiment, the preset duration includes 30 seconds, 45 seconds, 50 seconds, 60 seconds or 75 seconds, etc. Through experimental detection, the output power of the drive motor within 60 seconds can more accurately determine the load condition of the drum in a short time.

[0060] Further, continuously obtaining the output power of the drive motor includes: obtaining the output power of the drive motor at intervals of a preset reference duration.

[0061] The preset reference duration is less than the preset duration, for example: 0.1 second, 0.2 second, 0.3 second or 0.5 second.

[0062] In an embodiment of the present application, in response to a preset clothing drying instruction, the controller of the dryer controls the drum to rotate at a preset speed, and then obtains the output power of the drive motor at intervals of 0.3 seconds within 60 seconds, realizing continuous acquisition of the output power of the drive motor.

[0063] In step S330, the load condition of the drum includes full load or half load; where full load and half load are used to represent the amount of gravity of the clothes in the drum.

[0064] Please refer to Figure 4 , Figure 4A flowchart of steps for determining the load condition of a drum based on the output power provided for an exemplary embodiment of the present application. The controller is further configured to perform the following steps S410 to S420:

[0065] Step 410, obtain the power fluctuation value of the output power;

[0066] Step 420, determine the load condition of the drum according to the power fluctuation value.

[0067] The following will describe these two steps in detail respectively.

[0068] In step S410, it should be noted that during the drying process, the rotation of the drive motor is periodic. The output power of the drive motor also fluctuates. The power fluctuation value of the output power is the difference between the upper limit value and the lower limit value of the output power within a preset time period.

[0069] The upper limit value of the output power is the maximum output power obtained within a preset time period; the lower limit value of the output power is the minimum output power obtained within a preset time period.

[0070] In step S420, the preset full-load power fluctuation value and the preset half-load power fluctuation value are values obtained through laboratory tests.

[0071] In this embodiment, by obtaining the power fluctuation value of the output power and then determining the load condition of the drum according to this power fluctuation value, it is convenient to perform different drying operations on the clothes in the drum according to different load conditions of the drum, thereby improving the energy efficiency of the dryer.

[0072] Please refer to Figure 5 , Figure 5 A flowchart of steps for determining the load condition of a drum according to the power fluctuation value provided for an exemplary embodiment of the present application. The controller is further configured to perform the following steps S510 to S520:

[0073] Step S510, obtain a load reference power value according to the preset full-load power fluctuation value and the preset half-load power fluctuation value;

[0074] Step S520, determine the load condition of the drum according to the power fluctuation value and the load reference power value.

[0075] The following will describe these two steps in detail respectively.

[0076] In step S510, in an optional embodiment of the present application, when the dryer contains fully loaded clothes, within 60 seconds after receiving the clothes drying instruction, the controller obtains the output power of the drive motor at intervals of a preset reference duration. Then, the upper limit value and the lower limit value of the output power within 60 seconds are obtained, and the difference between the upper limit value and the lower limit value is determined as the preset full-load power fluctuation value.

[0077] In an optional embodiment of the present application, when the dryer contains half-loaded clothes, within 60 seconds after receiving the clothes drying instruction, the controller obtains the output power of the drive motor at intervals of a preset reference duration. Then, the upper limit value and the lower limit value of the output power within 60 seconds are obtained, and the difference between the upper limit value and the lower limit value is determined as the preset half-load power fluctuation value.

[0078] Further, obtaining the load reference power value according to the preset full-load power fluctuation value and the preset half-load power fluctuation value includes: obtaining the power difference between the full-load power fluctuation value and the half-load power fluctuation value; determining the sum of half of the power difference and the half-load power fluctuation value as the load reference power value. In this way, by obtaining the power difference between the full-load power fluctuation value and the half-load power fluctuation value, and then determining the sum of half of the power difference and the half-load power fluctuation value as the load reference power value, it is convenient to accurately determine the load condition of the drum according to the load reference power value, and the accuracy of obtaining the load condition is improved.

[0079] Among them, the power difference between the full-load power fluctuation value and the half-load power fluctuation value is the difference between the full-load power fluctuation value and the half-load power fluctuation value.

[0080] In the embodiment of the present application, the load reference power value is obtained by calculating ΔP = ΔP2 + (ΔP1 - ΔP2) / 2. Among them, ΔP is the load reference power value; ΔP2 is the preset half-load power fluctuation value; ΔP1 is the preset full-load power fluctuation value.

[0081] In the above formula for calculating the load reference power value, ΔP1 - ΔP2 is to obtain the power difference between the full-load power fluctuation value and the half-load power fluctuation value; (ΔP1 - ΔP2) / 2 is half of the power difference.

[0082] In step S520, the load condition of the drum is determined based on the power fluctuation value and the load reference power value, including: when the power fluctuation value reaches above the load reference power value, determining that the load condition is full load; and / or when the power fluctuation value reaches below the load reference power value, determining that the load condition is half load. In this way, the load condition of the drum can be accurately determined as full load or half load by the magnitude relationship between the power fluctuation value and the load reference power value, so as to perform different drying operations on the clothes in the drum according to different load conditions of the drum, thereby improving the energy efficiency of the dryer.

[0083] For example: when the power fluctuation value is greater than the load reference power value, determining that the load condition is full load; and / or when the power fluctuation value is less than or equal to the load reference power value, determining that the load condition is half load.

[0084] In this embodiment, by obtaining the load reference power value according to the preset full-load power fluctuation value and the preset half-load power fluctuation value, and then determining the load condition of the drum accurately based on the power fluctuation value and this load reference power value, the accuracy of obtaining the load condition is improved.

[0085] In step S340, the clothes drying rules corresponding to the load condition include the clothes drying rules corresponding to half load or the clothes drying rules corresponding to full load.

[0086] In this embodiment, in response to a preset clothes drying instruction, the drum is controlled to rotate at a preset speed, then when the drum rotates at the preset speed, the output power of the drive motor is obtained, and the load condition of the drum is determined according to the output power; the clothes in the drum are dried according to the load condition. In this way, compared with always using the same drying program to dry the clothes in the dryer, in this application, the load condition of the drum is determined based on the output power of the drive motor when the drum rotates at a preset speed, and then the clothes in the drum are dried according to the load condition, so that different drying operations can be performed on the clothes in the drum according to different load conditions of the drum, reducing the situation that the dryer continues to execute the drying program after the moisture contained in the clothes has evaporated, reducing the drying energy consumption of the dryer, and thus improving the energy efficiency of the dryer.

[0087] Please refer to Figure 6 , Figure 6 which is a flowchart of steps for drying the clothes in the drum according to the load condition provided by an exemplary embodiment of this application. The controller is further configured to execute the following steps S610 to step S620:

[0088] Step S610, obtaining the clothes drying rules corresponding to the load condition;

[0089] Step S620: Control the drive motor and the heat pump system according to the clothing drying rule corresponding to the load condition.

[0090] The following will describe these two steps in detail respectively.

[0091] In step S610, the clothing drying rule corresponding to half load is the energy efficiency optimization rule of the dryer when the load condition of the drum is half load, and in this clothing drying rule, the energy efficiency of the dryer is the highest; the clothing drying rule corresponding to full load is the energy efficiency optimization rule of the dryer when the load condition of the drum is full load, and in this clothing drying rule, the energy efficiency of the dryer is the highest.

[0092] Furthermore, obtaining the clothing drying rule corresponding to the load condition includes: performing a search operation in the preset drying rule database using the load condition to obtain the clothing drying rule corresponding to the load condition; the corresponding relationship between the load condition and the clothing drying rule is stored in the drying rule database. In this way, the clothing drying rule corresponding to the load condition can be accurately obtained using the preset drying rule database, so as to dry the clothes in the drum differently according to different load conditions of the drum, thereby improving the energy efficiency of the dryer.

[0093] In step S620, the clothing drying rule stores the corresponding relationship between the temperature of the internal circulation gas in the dryer, the clothing humidity, the rotation speed of the drive motor, and the rotation speed of the compressor. Then, through this clothing drying rule, the rotation speed of the drive motor and the rotation speed of the compressor can be controlled using the temperature of the internal circulation gas in the dryer and the clothing humidity.

[0094] In this embodiment, the drive motor and the heat pump system of the dryer can be controlled according to different clothing drying rules according to different load conditions of the drum to dry the clothes in the drum, thereby improving the energy efficiency of the dryer.

[0095] After considering the specification and the disclosed embodiments here, those skilled in the art will easily think of other implementation schemes of this application. This application aims to cover any variations, uses, or adaptive changes of this application, and these variations, uses, or adaptive changes follow the general principles of this application and include the common general knowledge or conventional technical means in the technical field not disclosed in this application.

[0096] It should be understood that the above content is only a preferred exemplary embodiment of this application and is not used to limit the implementation scheme of this application. Those of ordinary skill in the art can easily make corresponding adaptations or modifications according to the main concept and spirit of this application. Therefore, the protection scope of this application should be subject to the protection scope required by the claims.

Claims

1. A dryer, characterized in that, Comprising: A box body; A drum and a heat pump system disposed within the box body, the heat pump system being configured to convey heated air into the drum; A drive motor for providing rotational power to the drum; A controller electrically connected to the drive motor and the heat pump system, the controller being configured to perform the following steps: In response to a preset clothing drying instruction, control the drum to rotate at a preset speed; When the drum rotates at a preset speed, obtain the output power of the drive motor; Determine the load condition of the drum according to the output power; Dry the clothes in the drum according to the load condition.

2. The clothes dryer according to claim 1, characterized in that, When the drum rotates at a preset speed, the gravity acting on the clothes is greater than the centrifugal force acting on the clothes.

3. The dryer according to claim 1, characterized in that, The controller is further configured to: Continuously obtain the output power of the drive motor within a preset time period.

4. The dryer according to claim 1, characterized in that, The controller is further configured to: Obtain the power fluctuation value of the output power; Determine the load condition of the drum according to the power fluctuation value.

5. The dryer according to claim 4, characterized in that, The controller is further configured to: Obtain a load reference power value according to a preset full-load power fluctuation value and a preset half-load power fluctuation value; Determine the load condition of the drum according to the power fluctuation value and the load reference power value.

6. The dryer according to claim 5, wherein The controller is further configured to: Obtain the power difference between the full-load power fluctuation value and the half-load power fluctuation value; Determine the sum of half of the power difference and the half-load power fluctuation value as the load reference power value.

7. The dryer according to claim 5, characterized in that, The load condition includes full load or half load; the controller is further configured to: When the power fluctuation value reaches or exceeds the load reference power value, determine that the load condition is full load; and / or, When the power fluctuation value is below the load reference power value, determine that the load condition is half load.

8. The dryer according to claim 1, characterized in that, The controller is further configured to: Obtain the clothing drying rule corresponding to the load condition; Control the drive motor and the heat pump system according to the clothing drying rule.

9. The dryer according to claim 8, characterized in that, The controller is further configured to: Perform a lookup operation in a preset drying rule database using the load condition to obtain the clothing drying rule corresponding to the load condition; the corresponding relationship between the load condition and the clothing drying rule is stored in the drying rule database.

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