Determination method, display method and device of drying remaining time and drying equipment

Abstract

The invention discloses a method and device for determining drying remaining time, a method and device for displaying the drying remaining time and drying device.The method comprises the steps that in the drying stage, a roller of a drying machine is controlled to rotate according to multiple different rotating states, and the rotating states represent the rotating direction of the roller and the stable rotating speed in the rotating direction; and operation indexes of the dryer are obtained in each rotating state, and the remaining drying time is determined according to the obtained multiple sets of operation indexes. According to the drying method, the rotating states of the roller are different, the roller or the motor is required to be at a constant speed, and each group of operation indexes represent the working condition of the dryer in a stable operation state, so that the drying remaining time determined according to the operation indexes is more accurate compared with the drying remaining time estimated in real time in the prior art; the fluctuation of the estimation result of the remaining drying time is reduced, the stability of the drying process of the dryer is improved, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of dryer applications, and in particular to a method for determining remaining drying time, a method for displaying the remaining drying time, a device, and a drying device. Background Art

[0002] The dryer executes the drying process, mainly controlling the drum to rotate in a specific direction and sending hot air to the drum to remove moisture from the clothes in the drum. During this process, the dryer also needs to estimate the remaining drying time to adjust the stop time of the dryer to execute the drying process.

[0003] In the related art, the dryer can determine the condition of the clothes to be dried based on one or more factors such as the humidity of the clothes in the drum, the temperature of the circulating airflow in the air duct in the dryer, the electrical characteristics of the motor driving the drum to rotate, or the signal provided by the weight sensor, and then estimate the remaining drying time. The above methods basically use the real-time detection signal of the sensor to calculate the remaining drying time in real time. That is to say, the result of each calculation by the dryer only represents the corresponding remaining drying time under the current working conditions. Since the drum continues to roll during the drying process, the environmental indicators in the drum and / or the circulating airflow in the air duct will fluctuate, causing the calculated remaining drying time to fluctuate. On the one hand, it affects the stability of the dryer in executing the drying program, and on the other hand, it affects the user's judgment of the drying time, bringing a bad user experience. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a method for determining the remaining drying time, a method for displaying the remaining drying time, a device and a drying device, which can determine the remaining drying time more accurately.

[0005] The embodiment of the first aspect of the present application provides a method for determining the remaining drying time, comprising:

[0006] In the drying stage, the drum of the dryer is controlled to rotate according to at least three different rotation states, wherein the rotation state represents the rotation direction of the drum and the stable rotation speed in the rotation direction;

[0007] The operation index of the dryer is obtained in each rotation state, and the remaining drying time is determined according to the obtained multiple groups of the operation indexes.

[0008] The method for determining the remaining drying time of the first aspect of the embodiment of the present application has at least the following beneficial effects: the dryer controls the drum to undergo multiple different rotation states, and measures the operating indicators of the dryer in each rotation state to obtain a set of operating indicators in the current rotation state, and then determines the remaining drying time based on the multiple sets of operating indicators obtained by measurement; since each rotation state is different and requires the drum or motor to be at a constant speed, each set of operating indicators represents the working condition of the dryer in a stable operating state. Therefore, the remaining drying time determined based on these operating indicators is more accurate than the remaining drying time estimated in real time by the prior art, reduces the fluctuation of the estimation result of the remaining drying time, improves the stability of the dryer in controlling the drying process, and improves the user experience.

[0009] According to some embodiments of the present application, the dryer includes an air supply duct and a motor for driving the drum to rotate, and the operating index includes an operating parameter of the motor; the obtaining the operating index of the dryer in each rotation state, and determining the remaining drying time according to the obtained multiple groups of the operating indexes, includes:

[0010] When the motor controls the drum to rotate according to one of the rotation states, a set of operating parameters of the motor in the current rotation state is obtained;

[0011] Determining a drying influencing parameter according to the at least two groups of the operating parameters obtained, the drying influencing parameter comprising an air blocking index representing a blocking level of the air supply duct and a load characteristic index representing a load size in the drum;

[0012] The remaining drying time is determined according to the drying influencing parameters.

[0013] According to some embodiments of the present application, the load characteristic index includes a first quality parameter characterizing the drying quality of the clothes in the drum and a second quality parameter characterizing the quality of water contained in the clothes in the drum; and determining the drying influencing parameter according to the at least two sets of the acquired operating parameters includes:

[0014] Taking the first quality parameter, the second quality parameter and the air blocking index as unknowns, constructing a corresponding relationship between the drying influencing parameter and the operating parameter;

[0015] The first quality parameter, the second quality parameter and the air blockage index are determined according to the three or more groups of operating parameters and the corresponding relationship between the drying influencing parameters and the operating parameters.

[0016] According to some embodiments of the present application, determining the remaining drying time according to the drying influencing parameter includes:

[0017] The remaining drying time is determined according to the first quality parameter, the second quality parameter and the air blockage index.

[0018] According to some embodiments of the present application, the load characteristic index includes a third mass parameter characterizing the total mass of the clothes in the drum and a moisture content characterizing the moisture content of the clothes in the drum; and determining the drying influencing parameter according to the acquired multiple groups of operating parameters includes:

[0019] Taking the third quality parameter, the moisture content and the air blocking index as unknowns, constructing a corresponding relationship between the drying influencing parameter and the operating parameter;

[0020] The third quality parameter, the moisture content and the air blocking index are determined according to the three or more groups of operating parameters and the corresponding relationship between the drying influencing parameters and the operating parameters.

[0021] According to some embodiments of the present application, determining the remaining drying time according to the drying influencing parameter includes:

[0022] The remaining drying time is determined according to the third quality parameter, the moisture content and the air blocking index.

[0023] According to some embodiments of the present application, the dryer includes a humidity sensing component disposed on the drum and a motor for driving the drum to rotate, and the operating index includes humidity characteristic information detected by the humidity sensing component; the step of obtaining the operating index of the dryer in each rotation state and determining the remaining drying time according to the obtained multiple groups of the operating indexes includes:

[0024] When the motor controls the drum to rotate according to one of the rotation states, a set of humidity characteristic information of the humidity sensing component in the current rotation state is obtained;

[0025] The remaining drying time is determined according to the acquired multiple groups of humidity characteristic information.

[0026] According to some embodiments of the present application, determining the remaining drying time according to the acquired multiple groups of humidity characteristic information includes:

[0027] Determining a weight value of the humidity characteristic information obtained under different rotation states;

[0028] The remaining drying time is determined according to the three or more groups of humidity characteristic information and the weight values ​​corresponding to the respective groups of humidity characteristic information.

[0029] According to some embodiments of the present application, the step of obtaining a set of humidity characteristic information of the humidity sensing component in the current rotation state includes:

[0030] In the current rotation state, obtaining a plurality of signal values ​​detected by the humidity sensing component within a first preset detection time period;

[0031] A typical humidity value is determined according to the multiple signal values ​​as humidity characteristic information under the current rotation state.

[0032] According to some embodiments of the present application, at least one of the multiple rotation states has a rotation direction opposite to that of the other rotation states, and the drum rotates continuously for at least a first number of times in each rotation state.

[0033] According to some embodiments of the present application, the dryer further includes a motor for driving the drum to rotate; and the determination method further includes:

[0034] When it is necessary to control the drum to switch from the first rotation state to the second rotation state, adjusting the operating parameters of the motor according to the second rotation state;

[0035] Detect the rotation speed of the drum and / or the rotation speed of the motor, and when the rotation speed of the drum and / or the rotation speed of the motor is stable within the expected speed range corresponding to the second rotation state within a second preset detection time period, determine that the drum enters the second rotation state.

[0036] According to some embodiments of the present application, the drum of the dryer is controlled to rotate according to a plurality of different rotation states, including:

[0037] During a first operation period when the drying process is started, the drum is controlled to rotate in at least three different rotation states.

[0038] According to some embodiments of the present application, the determination method further includes:

[0039] When the drum is controlled to rotate according to the three different rotation states, the target remaining drying time is determined according to the three groups of operation indicators obtained.

[0040] According to some embodiments of the present application, after determining the target remaining drying time, the determination method further includes:

[0041] controlling the drum to rotate according to at least one of the rotation states;

[0042] The target remaining drying time is updated according to at least one set of the acquired operation indicators.

[0043] According to some embodiments of the present application, the determination method further includes:

[0044] When the target remaining drying time is less than the preset time, the target remaining drying time is no longer updated.

[0045] A second aspect of the present application provides a method for displaying the remaining drying time, which is applied to a dryer. The method includes:

[0046] When receiving the drying operation command, the remaining time of initial drying is displayed;

[0047] Execute the method for determining the remaining drying time according to any one of claims 1 to 15 to obtain a target remaining drying time;

[0048] The target remaining drying time is displayed.

[0049] According to some embodiments of the present application, the display method further includes:

[0050] The target remaining drying time is displayed through the display panel of the dryer, and / or prompt information for prompting the target remaining drying time is sent to the target mobile terminal.

[0051] The third aspect of the present application provides a device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the determination method described in the first aspect or the display method described in the second aspect when running the computer program.

[0052] The fourth aspect of the present application provides a drying device, comprising the device as described in the third aspect.

[0053] The fifth aspect of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the determination method described in the first aspect or the display method described in the second aspect.

[0054] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is an overall flow chart of the method for determining the remaining drying time provided in the embodiment of the present application;

[0056] Figure 2is a flow chart of a process of switching a rotation state provided by an embodiment of the present application;

[0057] Figure 3 is a flowchart of executing at least three rotation states within a first running time provided by an embodiment of the present application;

[0058] Figure 4 It is a flow chart of obtaining three groups of operating indicators and determining the remaining drying time provided in an embodiment of the present application;

[0059] Figure 5 is a flow chart of updating the target drying remaining time provided by an embodiment of the present application;

[0060] Figure 6 is a flowchart of ending the update of the target drying remaining time provided by an embodiment of the present application;

[0061] Figure 7 is a flow chart of determining the remaining drying time based on the motor operating parameters provided in Example A of the present application;

[0062] Figure 8 This is a flow chart of the first method of calculating drying influencing parameters provided in Example A of the present application;

[0063] Fig. 9 This is a flow chart of the second method for calculating drying influencing parameters provided in Example A of the present application;

[0064] Fig.10 is a flow chart of determining the remaining drying time based on humidity characteristic information provided in Example B of the present application;

[0065] Fig.11 is a flow chart for determining the remaining drying time based on weight and humidity characteristic information provided in Example B of the present application;

[0066] Fig.12 is a flow chart of selecting a typical humidity value to determine humidity characteristic information provided in Example B of the present application;

[0067] Fig.13 It is an overall flow chart of the method for displaying the remaining drying time provided in the embodiment of the present application;

[0068] Fig.14 It is a flow chart showing the remaining time of target drying provided by an embodiment of the present application. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, the characteristics, operations or features described in the specification can be combined in any appropriate manner to form various implementation methods. At the same time, the steps or actions in the method description can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the accompanying drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a necessary sequence, unless otherwise specified that a certain sequence must be followed.

[0070] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0071] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0072] In the related art, a dryer, or clothes dryer, controls the length of the drying time according to the amount of clothes loaded by the user and the humidity level of the clothes during the drying process. However, since the dryer cannot directly determine the amount of clothes loaded by the user and the initial humidity of the clothes at the beginning, it is necessary to further measure during the drying process to estimate the remaining drying time and use the new remaining drying time to update the current remaining drying time.

[0073] The dryer can measure the humidity level, weight, temperature in the drum and other indicators of the clothes to be dried through sensors, etc., and determine the remaining drying time based on these indicators. In order to continuously correct the current remaining drying time, the sensor is set to periodically detect the indicators in the dryer, so as to estimate the new remaining drying time in real time, so that the accurate remaining drying time can be continuously provided to the user. The above scheme realizes different updating frequencies of the remaining drying time according to the length of the update cycle. If the update cycle is set too short, the indicators obtained by each measurement will fluctuate due to the changes in the internal environment of the drum of the dryer, so the estimated remaining drying time will also fluctuate, affecting the stability of the drying process, and also making it difficult for the user to judge the end time of drying. If the update cycle is set too long, the remaining drying time obtained cannot give an accurate prompt to the user, resulting in the user's incorrect judgment of the end time of drying, and the clothes may be insufficiently dried or over-dried due to the deviation of the drying time. In short, although the method of directly using sensors for real-time measurement is feasible to a certain extent, there is still room for improvement in balancing the accurate estimation of the remaining drying time and ensuring the stability of the drying process.

[0074] Based on this, the embodiments of the present application provide a method for determining the remaining drying time, a display method, a device and a drying equipment. By controlling the drum to undergo a plurality of rotation states at different constant speeds and determining the operating indicators of the dryer under each constant speed rotation state, the remaining drying time is estimated based on the obtained multiple sets of operating indicators. This can improve the estimation accuracy of the remaining drying time and improve the stability of the drying process.

[0075] The determination method of the embodiment of the present application is further described below in conjunction with the accompanying drawings.

[0076] Reference Figure 1 As shown, the embodiment of the present application provides a method for determining the remaining drying time, including but not limited to the following steps:

[0077] Step S100, in the drying stage, controlling the drum of the dryer to rotate according to a plurality of different rotation states, wherein the rotation state represents the rotation direction of the drum and the stable rotation speed in the rotation direction;

[0078] Step S200, obtaining the operation index of the dryer in each rotation state, and determining the remaining drying time according to the obtained multiple groups of operation indexes.

[0079] The dryer includes a drum and a motor for driving the drum. The motor drives the drum to rotate forward and reversely through a belt or a shaft. The dryer also includes an air supply duct. The air supply duct sends dry hot air into the drum to contact the clothes in the drum, turning it into wet and cold air, and then discharges the wet and cold air out of the drum. There is a heating mechanism in the air supply duct, which can heat the air to turn it into dry hot air and send the dry hot air into the drum, while the wet and cold air can be discharged to the outside or enter the air supply duct for condensation and then circulation. Therefore, in the drying stage, by controlling the motor to drive the drum to rotate forward and reverse, the clothes in the drum can be shaken out, so that the clothes are fully in contact with the dry hot air, thereby improving the drying efficiency.

[0080] In this process, the drum rotates in at least two rotation states, and the operating indicators of the dryer are measured in each rotation state. Among them, the rotation state characterizes the rotation direction of the drum and the stable rotation speed in the rotation direction, which is manifested on the motor as the rotation direction output to the drum and the constant rotation speed in the rotation direction. It is worth noting that the rotation state has two dimensions: rotation direction and rotation speed. Therefore, when the rotation direction of one rotation state is different from that of another rotation state but the rotation speed is the same, they are considered to belong to two different rotation states. Similarly, when the rotation speed of one rotation state is different from that of another rotation state but the rotation direction is the same, they are also considered to belong to two different rotation states. Measuring the operating indicators of the dryer in the current rotation state requires that the rotation speed of the drum is stable and / or the rotation speed of the motor is stable in the current rotation state, which represents that the dryer is in a steady state, so that the measured operating indicators can represent the stable state of the dryer in this rotation state. Therefore, the motor is controlled to change the rotation state of the drum multiple times (for example, the motor rotates forward at 1500 rpm, reverse at 1500 rpm, and forward at 3000 rpm, for a total of three rotation states), and the operating indicators of the dryer are measured in each rotation state. Multiple groups of operating indicators representing the stable state of the dryer in different rotation states can be obtained. Based on the multiple groups of operating indicators, an accurate remaining drying time can be determined. The order of the three rotation states in the above example can be changed, but when an appropriate order is determined, the corresponding coefficients are determined for the multiple groups of operating indicators obtained to calculate the remaining drying time.

[0081] It is worth noting that the above-mentioned rotation state requires the rotation speed of the drum to be stable and / or the rotation speed of the motor to be stable. In fact, when the drum rotates at a constant speed, the environment inside the drum will also change, resulting in a small fluctuation in the rotation speed of the drum or the output speed of the motor. In consideration of this fluctuation error, a rotation speed range near the constant rotation speed is considered. When the rotation speed of the drum or the motor falls into this rotation speed range within a period of time, it is considered that the drum or the motor is currently in a state of constant speed rotation. Therefore, referring to Figure 2 As shown, the method for determining the remaining drying time in the embodiment of the present application further includes the following steps:

[0082] Step S310, when it is necessary to control the drum to switch from the first rotation state to the second rotation state, adjusting the operating parameters of the motor according to the second rotation state;

[0083] Step S320, detect the rotation speed of the drum and / or the rotation speed of the motor. When the rotation speed of the drum and / or the rotation speed of the motor is stable within the expected speed range corresponding to the second rotation state within a second preset detection time, determine that the drum enters the second rotation state.

[0084] The second preset detection duration is set according to actual needs. Taking the switching of the rotation state of the motor as an example, the controller instructs the motor to switch from 1500 rpm to 3000 rpm (the influence of the rotation direction is not considered here), then the drive signal of the motor is adjusted to increase the motor from 1500 rpm to 3000 rpm (expected speed), and the real-time rotation speed of the motor is monitored. The expected speed range can be set to 2900-3100 rpm. Then, when the real-time rotation speed of the motor is monitored to fall into the set expected speed range within the second preset detection duration, it is considered that the motor is currently in the rotation state after switching.

[0085] In order to determine that the rotation speed of the drum and / or motor is constant over a period of time, each rotation state should last at least for a period of time or a certain number of turns. For example, if the controller instructs the motor to output a constant rotation speed according to a certain rotation state, it is possible to monitor whether the actual rotation speed of the drum and / or motor is stable over a period of time. If so, it indicates that the drum and / or motor is in the required rotation state. For example, if the controller instructs the motor to output a constant rotation speed according to a certain rotation state, the drum can be rotated at least three times in the specified rotation direction, and it is considered that the drum and / or motor is in the required rotation state. Among them, other stages can be inserted between any two rotation states, such as the stage where the drum or motor stops rotating, the stage where the rotation speed of the drum is controlled to increase, etc., which are not listed one by one here.

[0086] In some embodiments, at least one of the multiple rotation states has a rotation direction opposite to that of the other rotation states, so that errors caused by a single rotation direction when measuring operating indicators can be avoided. For example, in the first three rotation states, two rotation states are forward rotations, and one rotation state is reverse rotation (for example, the motor rotates forward at 1500 rpm, reverses at 1500 rpm, and rotates forward at 3000 rpm). In one possible case, after the dryer enters the drying process and obtains the first three groups of operating indicators, it estimates the remaining drying time. Then, in the first three rotation states of the drum / motor after entering the drying process, there is a rotation state whose rotation direction is opposite to that of the other two rotation states.

[0087] The dryer needs to update the initial remaining drying time as soon as possible after starting the drying process. For the embodiment of the present application, it can be limited that the dryer needs to complete at least a certain number of rotation states and obtain the remaining drying time within the first running time of the drying process. Figure 3 As shown, in the above step S100, the drum of the dryer is controlled to rotate according to a plurality of different rotation states, including:

[0088] Step S101, during the first operation time of starting the drying process, controlling the drum to rotate according to at least three different rotation states.

[0089] The first operation time can be set according to actual needs, and can be determined according to how many different rotation states are to be completed. For example, the first operation time is 30 minutes, and the dryer is required to complete at least three different rotation states within the first 30 minutes of starting the drying. Figure 4 As shown, when the dryer is required to estimate a remaining drying time after obtaining the first three groups of operating indicators, the method for determining the remaining drying time in the embodiment of the present application further includes:

[0090] Step S401, when the drum is controlled to rotate in three different rotation states, the target remaining drying time is determined according to the three sets of operation indicators obtained.

[0091] The operating indicators measured under three different rotation states can be used to calculate the target remaining drying time by constructing corresponding relationship expressions. For example, the first humidity value, the second humidity value, and the third humidity value are measured, and an appropriate coefficient is set for each of the first humidity value, the second humidity value, and the third humidity value. The sum of the products of these humidity values ​​and the corresponding coefficients is used as the target remaining drying time. For another example, the first current value, the second current value, and the third current value of the motor are measured, and a three-variable linear equation group about three unknowns is constructed according to the first current value, the second current value, and the third current value. These three unknowns can be indicators related to the operating environment of the dryer and / or the drying load. These indicators can help calculate the target remaining drying time. In this way, by solving the above three-variable linear equation group, the values ​​of the three unknowns can be obtained, thereby determining the target remaining drying time.

[0092] In some embodiments, after the target remaining drying time is determined in the above manner, the operating indicators of the dryer under different rotation states can be continuously measured during the subsequent drying process. Figure 5 As shown, after determining the target remaining drying time, the determination method of the embodiment of the present application further includes:

[0093] Step S402, controlling the drum to rotate according to at least one rotation state;

[0094] Step S403: updating the target remaining drying time according to the acquired at least one set of operation indicators.

[0095] Taking the calculation of a target drying remaining time using the first three groups of operating indicators as an example, the drum is controlled to rotate according to the fourth rotation state, and the corresponding fourth group of operating indicators under the fourth rotation state is measured. The target drying remaining time is corrected according to the fourth group of operating indicators, that is, a new target drying remaining time is obtained, wherein the fourth group of operating indicators and the first three groups of operating indicators can be calculated by least squares method or simply weighted average to obtain a new target drying remaining time, and the specific calculation method is not limited here. Taking the calculation of a target drying remaining time using the first three groups of operating indicators as an example, the drum is controlled to rotate according to multiple subsequent rotation states, and after accumulating multiple operating indicators (for example, obtaining the fourth, fifth and sixth groups of operating indicators), the target drying remaining time is updated based on these newly obtained operating indicators.

[0096] It is understandable that during the drying process, when the drying is close to the end, the target remaining drying time may no longer be updated, that is, referring to Figure 6 As shown, the determination method of the embodiment of the present application also includes:

[0097] Step S404: when the target remaining drying time is less than the preset time, the target remaining drying time is no longer updated.

[0098] The preset duration can be set according to actual needs. When the target remaining drying time is short, less than the preset duration (e.g., 10 minutes), consider not updating the target remaining drying time. At this time, the drying process is nearly completed, the load in the drum or the blockage in the air supply duct of the dryer are stable, and the currently displayed target remaining drying time is relatively accurate, so there is no need to continue updating the target remaining drying time. In actual operation, the operating indicators of the dryer can continue to be measured, but the target remaining drying time is no longer estimated based on these operating indicators.

[0099] It is worth noting that the operating index of the dryer can be various different indexes, such as the torque of the motor, the load of the drum, the humidity in the drum, etc. According to different operating indexes, some problems existing in the dryer in the related art can be overcome, and a more accurate remaining drying time can be obtained. The following is an explanation through two specific embodiments.

[0100] Example A

[0101] The operation index is an operation parameter related to the motor, and the remaining drying time is estimated based on the operation parameters of the motor. The operation parameters of the motor include the drive current, drive voltage, rotation speed, torque, etc. of the motor, and one or more of the operation parameters are selected to estimate the remaining drying time.

[0102] The change of the remaining drying time will be affected by the weight of the clothes in the drum. As the drying process proceeds, the water content in the clothes decreases, and the weight of the clothes in the drum decreases, causing the motor drive load to change. In the related art based on the motor to estimate the remaining drying time, only the drying load is considered. In fact, the motor of the dryer not only drives the drum to rotate, but also drives the rotation of the fan. The existing scheme believes that the power absorption of the fan to the motor can be ignored. When calculating the remaining drying time, it is considered that all the power consumption of the motor is used to drive the rotation of the drum. This is applicable to drying equipment such as washing machines that do not have a fan. However, most of the current drying equipment uses a fan to deliver hot air into the drum to accelerate the drying process and reduce the time required to dry clothes. In this case, the power absorption of the fan is usually much greater than the power absorption when the drum rotates. Therefore, the existing scheme has obvious disadvantages. If you want a more accurate remaining drying time, you need to set up an additional motor for driving the fan, which undoubtedly increases the production cost of the dryer. If the influence of the fan on the estimation of the remaining drying time is not considered, the remaining drying time will be inaccurate. For example, in patent US4741182A, the operating parameter equation of the motor is constructed based on the following formula:

[0103]

[0104] Among them, Cm is the driving torque of the motor, L is the moment of inertia of the clothes rotating in the drum, J o is the moment of inertia of the drum, w is the speed of the motor, dw / dt is the acceleration of the drum, C f is the friction torque of the roller.

[0105] In a dryer with a fan, the torque required by the fan is usually much higher than the friction torque of the drum, but the above formula completely ignores this factor. On the other hand, in order to estimate the moment of inertia L of the clothes, it is necessary to control the drum to rotate at a constant acceleration. If the drum rotates at a constant speed, the acceleration is zero and the moment of inertia L of the clothes cannot be obtained.

[0106] It can be seen that the influence of the fan needs to be considered when determining the remaining drying time based on the motor torque. The power absorption of the fan is usually closely related to the air flow in the air supply duct. Figure 7 As shown, in the determination method of this embodiment, in the above step S100, the operation index of the dryer is obtained in each rotation state, and the remaining drying time is determined according to the obtained multiple groups of operation indexes, including:

[0107] Step S110, when the drum is controlled by the motor to rotate according to one of the rotation states, a set of operating parameters of the motor in the current rotation state is obtained;

[0108] Step S120, determining a drying influencing parameter according to the at least two sets of operating parameters obtained, the drying influencing parameter including an air blocking index representing a blocking level of the air supply duct and a load characteristic index representing a load size in the drum;

[0109] Step S130, determining the remaining drying time according to the drying influencing parameters.

[0110] In each rotation state, the drum / motor has a constant rotation speed, and a set of operating parameters of the motor in a certain rotation state is obtained through relevant sensors, and then the drying influencing parameters are determined according to at least two sets of operating parameters of the motor, wherein the drying influencing parameters include an air blockage index and a load characteristic index, wherein the air blockage index and the load characteristic index can be considered as unknowns to be solved, and the air blockage index and the load characteristic index can be obtained by constructing an equation between the operating parameters and the two unknowns, and then constructing a binary equation group for solving, and then the remaining drying time is further determined according to the air blockage index and the load characteristic index; of course, the air blockage index and the load characteristic index are conceptual terms, and the air blockage index can actually be composed of one or more indicators related to the air flow level in the air supply channel, such as hot air pressure, the air outlet level index of the filter cotton net, etc., and the load characteristic index can also be composed of one or more indicators related to the clothes in the drum, such as the total mass of the clothes, the mass of water contained in the clothes, the moisture content of the clothes, etc. When the air blockage index and the load characteristic index actually include N indicators, an N-dimensional equation group can be constructed according to the operating parameters of the N sets of motors, and the values ​​of these N indicators are solved to determine the remaining drying time. Different indicators have different ways of calculating the remaining drying time. Those skilled in the art can construct a calculation formula for the remaining drying time based on the actual indicators to be solved, and no limitation is made here.

[0111] As can be seen from the above step S120, the calculation of the drying influence parameter takes into account the air blockage index that characterizes the blockage level of the air supply duct, that is, the remaining drying time calculated by the drying influence parameter is related to the blockage level of the air supply duct, that is, the remaining drying time is related to the power absorption of the fan, which solves the problem of inaccurate calculation of the remaining drying time due to failure to consider the influence of the fan on the remaining drying time in the related art. Furthermore, in addition to reflecting the operation of the fan, the air blockage index can also reflect the air flow in the air supply duct, such as the amount of fabric adhered to the filter cotton net, etc. Therefore, the air blockage index can reflect the overall influence of the air supply link on the remaining drying time.

[0112] Based on the determination method of embodiment A, in some embodiments, the load characteristic index includes a first quality parameter characterizing the drying quality of the clothes in the drum and a second quality parameter characterizing the quality of the water contained in the clothes in the drum; Figure 8 As shown, in the above step S120, the drying influencing parameters are determined according to the at least two sets of operating parameters obtained, including:

[0113] Step S121, taking the first quality parameter, the second quality parameter and the air blockage index as unknowns, constructing a corresponding relationship between the drying influencing parameters and the operating parameters;

[0114] Step S122, determining the first quality parameter, the second quality parameter and the air blockage index according to more than three groups of operating parameters and the corresponding relationship between the drying influencing parameters and the operating parameters.

[0115] In this embodiment, the load characteristic index includes two indexes, one of which is a first mass parameter characterizing the drying quality of the clothes in the drum, and the other is a second mass parameter characterizing the quality of the water contained in the clothes in the drum. The first mass parameter and the second mass parameter are both unknown quantities, which cannot be directly measured by the dryer, and the air blockage index cannot be directly measured either. In this way, the first mass parameter, the second mass parameter and the air blockage index are used as three unknowns to construct a ternary equation. As can be seen from the above description, when there are three indicators to be solved, it is necessary to measure the operating parameters of at least three groups of motors. For example, first, the operating parameters of the first three groups of motors are used to construct a set of equations about the first mass parameter, the second mass parameter and the air blockage index, that is, a linear or nonlinear system consisting of three equations and three unknowns is obtained, and then the set of equations is solved to obtain the values ​​of the first mass parameter, the second mass parameter and the air blockage index.

[0116] The operating parameters of the motor in this embodiment A can be the driving torque of the motor and the rotation speed of the motor. The driving torque of the motor can be measured by a torque sensor, and the rotation speed of the motor can be measured by a feedback circuit or a rotation speed sensing device built into the motor. When the operating parameters of the motor can be measured, the remaining drying time estimation based on the motor state in this embodiment A can refer to the following formulas: Specifically, in this embodiment A, a calculation method different from the solution of the related art is sought, and the method is based on the following equation:

[0117] T m =T f +T d +T b

[0118] Among them, T m is the driving torque of the motor, T f is the friction torque of the roller, T d is the torque required to rotate the drum due to unbalanced load (clothes), T b is the torque required by the motor to drive the fan. Since the present embodiment A requires the motor to drive the drum to rotate at a constant rotation speed, the friction torque T of the drum can be set as follows: f Can be regarded as a constant, torque T d is a function of the dry mass of the load and the water content of the load, the torque T b It is a function of the dry mass of the load, the moisture content of the load, the air blockage in the air supply channel, and the motor speed. Therefore, in one possible embodiment, the above T f , Td , T b They can be expressed as the following formulas:

[0119] T f =k0

[0120] T d =k1*M f +k2*M w

[0121] T b =(k3+k4*M f +k5*M w +k6*F o )*W+(k7+k8*M f +k9*M w +k10*F o )*W 2

[0122] Where ki is a preset coefficient, 1≤i≤10, and the value of ki can be determined according to the rotation state and the order of the rotation state. f is the dry mass of the clothes in the drum, M w is the mass of water contained in the clothes in the drum, F o is the air blockage index that characterizes the blockage level of the air supply duct, and W is the speed of the motor. m =T f +T d +T b It can be expressed as:

[0123] T m =k0+(k1*M f +k2*M w )+(k3+k4*M f +k5*M w +k6*F o )*W+(k7+k8*M f +k9*M w +k10*F o )*W 2

[0124] By using the above formula and the driving torque and rotation speed of the motor measured in at least three rotation states, M can be solved f 、M w and F o , that is, the values ​​of the first quality parameter, the second quality parameter and the air blockage index, then those skilled in the art can determine the remaining drying time based on the first quality parameter, the second quality parameter and the air blockage index, which will not be elaborated here.

[0125] It can be understood that the three sets of motor operating parameters obtained by measuring the three rotation states are used to solve the values ​​of the first quality parameter, the second quality parameter and the air blockage index, and then obtain the remaining drying time. Thereafter, multiple sets of motor operating parameters can be measured in more rotation states. These operating parameters can also be used to update the remaining drying time. For example, for every three consecutive rotation states, each three sets of operating parameters measured constitute a set of three-variable linear equations about the first quality parameter, the second quality parameter and the air blockage index, and then a new remaining drying time is solved. For another example, each time one or more sets of operating parameters are measured in one or more rotation states, they are combined with the previous remaining drying time to obtain a new remaining drying time.

[0126] It is worth noting that the above formulas show that the remaining drying time can be solved by measuring the driving torque and rotation speed of the motor. Those skilled in the art can transform the measurement object based on the driving torque and rotation speed, such as measuring the current or power absorption of the motor, or other operating parameters related to the operating state of the motor, and then modify the above equations to adapt to different measurement objects. Therefore, the present embodiment A measures the driving torque and rotation speed of the motor, which is only one of the possible embodiments, and is not limited to the calculation of the remaining drying time based only on the driving torque and rotation speed.

[0127] Based on the determination method of embodiment A, in some embodiments, the load characteristic index includes a third mass parameter representing the total mass of the clothes in the drum and a moisture content representing the moisture content of the clothes in the drum; Fig. 9 As shown, in the above step S120, the drying influencing parameters are determined according to the acquired multiple groups of operating parameters, including:

[0128] Step S123, taking the third quality parameter, moisture content and air blocking index as unknowns, constructing a corresponding relationship between the drying influencing parameters and the operating parameters;

[0129] Step S124, determining the third quality parameter, the moisture content and the air blocking index according to more than three groups of operating parameters and the corresponding relationship between the drying influencing parameters and the operating parameters.

[0130] In this embodiment, the load characteristic index includes two indexes, one of which is a third mass parameter characterizing the total mass of the clothes in the drum, and the other is a moisture content characterizing the water content of the clothes in the drum, wherein the total mass of the clothes is the sum of the dry mass of the clothes and the mass of the water contained in the clothes, and the moisture content is the ratio of the mass of the water contained in the clothes to the dry mass of the clothes (or the ratio of the mass of the water contained in the clothes to the total mass of the clothes). The third mass parameter and the moisture content are both unknown quantities, which cannot be directly measured by the dryer (if the dryer is equipped with a weight sensor, the total mass of the clothes can be determined), and the air blockage index cannot be directly measured either. In this way, the third mass parameter, the moisture content and the air blockage index are used as three unknowns to construct a ternary equation. From the above description, it can be seen that when there are three indicators that need to be solved, it is necessary to measure the operating parameters of at least three groups of motors. For example, first, the operating parameters of the first three groups of motors are used to construct a group of equations about the third mass parameter, moisture content and air blockage index, that is, a linear or nonlinear system consisting of three equations and three unknowns is obtained, and then the group of equations is solved to obtain the third mass parameter, moisture content and air blockage index (when the total mass of the clothes can be measured by the sensor, the group of equations can be constructed by two equations and two unknowns).

[0131] The operating parameters of the motor in this embodiment A can be the driving torque of the motor and the rotation speed of the motor. The driving torque of the motor can be measured by a torque sensor, and the rotation speed of the motor can be measured by a feedback circuit or a rotation speed sensing device built into the motor. When the operating parameters of the motor can be measured, the remaining drying time estimation based on the motor state in this embodiment A can refer to the following formulas: Specifically, in this embodiment A, a calculation method different from the solution of the related art is sought, and the method is based on the following equation:

[0132] T m =T f +T d +T b

[0133] Among them, T m is the driving torque of the motor, T f is the friction torque of the roller, T d is the torque required to rotate the drum due to unbalanced load (clothes), T b is the torque required by the motor to drive the fan. Since the present embodiment A requires the motor to drive the drum to rotate at a constant rotation speed, the friction torque T of the drum can be set as follows: f Can be regarded as a constant, torque T d It is a function of the total mass of the load and the water content of the load. The torque T bis a function of the total mass of the load, the moisture content of the load, the air blockage in the air supply channel, and the motor speed. Therefore, in one possible embodiment, the above T f , T d , T b They can be expressed as follows:

[0134] T f =j0

[0135] T d =j1*M t +j2*M r

[0136] T b =(j3+j4*M t +j5*M r +j6*F o )*W+(j7+j8*M t +j9*M r +j10*F o )*W 2

[0137] Where ji is a preset coefficient, 1≤i≤10, and the value of ji can be determined according to the rotation state and the order of the rotation state. t is the total mass of the laundry in the drum, M r is the moisture content of the clothes in the drum, F o is the air blockage index that characterizes the blockage level of the air supply duct, and W is the speed of the motor. m =T f +T d +T b It can be expressed as:

[0138] T m =j0+(j1*M t +j2*M r )+(j3+j4*M t +j5*M r +j6*F o )*W+(j7+j8*M t +j9*M r +j10*F o )*W 2

[0139] By using the above formula and the driving torque and rotation speed of the motor measured in at least three rotation states, M can be solved t 、M r and F o, that is, the values ​​of the third quality parameter, moisture content and air blockage index, then those skilled in the art can determine the remaining drying time based on the third quality parameter, moisture content and air blockage index, which will not be elaborated here.

[0140] It can be understood that the three groups of motor operating parameters obtained by measuring the three rotation states are used to solve the values ​​of the third quality parameter, moisture content and air blockage index, and then obtain the remaining drying time. After that, multiple groups of motor operating parameters can be measured in more rotation states, and these operating parameters can also be used to update the remaining drying time. For example, each three groups of operating parameters obtained by measuring three rotation states continuously constitute a three-variable linear equation group about the third quality parameter, moisture content and air blockage index, and then solve to obtain a new remaining drying time. For another example, one or more groups of operating parameters obtained by measuring one or more rotation states each time are combined with the previous remaining drying time to obtain a new remaining drying time.

[0141] It is worth noting that the above formulas show that the remaining drying time can be solved by measuring the driving torque and rotation speed of the motor. Those skilled in the art can transform the measurement object based on the driving torque and rotation speed, such as measuring the current or power absorption of the motor, or other operating parameters related to the operating state of the motor, and then modify the above equations to adapt to different measurement objects. Therefore, the present embodiment A measures the driving torque and rotation speed of the motor, which is only one of the possible embodiments, and is not limited to the calculation of the remaining drying time based only on the driving torque and rotation speed.

[0142] The determination method of Example A can be applied to different types of dryers, for example, a condensing dryer, which includes a drum, a motor and an air supply duct, a blower impeller and a heating device are arranged in the air supply duct, the heating device heats the air in the air supply duct, and the blower drives the impeller to send the heated air into the drum; wherein, both the blower and the drum are driven by a motor. Another example is applied to a heat pump dryer, which includes a drum, a motor and an air supply duct, a blower impeller and a condensation system are arranged in the air supply duct, the heat release end of the condensation system heats the air in the air supply duct, and the blower drives the impeller to send the heated air into the drum, the air coming out of the drum passes through the heat absorption end of the condensation system to precipitate moisture, and then circulates to the heat release end of the condensation system; wherein, both the blower and the drum are driven by a motor. In the dryer of Example A, the operating parameters of the motor are measured by a specific sensor or device, so other sensors such as weight sensors, humidity sensors, etc. may not be arranged, and the remaining drying time is directly obtained by obtaining the operating parameters of the electrode.

[0143] Example B

[0144] The operating index is the humidity characteristic information detected by the humidity sensing component, and the remaining drying time is estimated based on the humidity characteristic information. The humidity characteristic information includes humidity value, ambient humidity in the drum, humidity of the clothes, conductivity of the clothes, or other parameters related to the humidity of the clothes, etc. One or more humidity characteristic information is selected to estimate the remaining drying time.

[0145] The change of the remaining drying time will be affected by the humidity of the clothes in the drum. As the drying process proceeds, the water content in the clothes decreases, and the value of the detected humidity characteristic information will decrease. The dryer determines how to adjust the drying process according to the value of the humidity characteristic information. In the related technology for estimating the remaining drying time based on information such as humidity, one part detects the environmental humidity in the drum through a humidity sensor. This solution is easily affected by the hot air sent into the drum, and the accuracy needs to be improved. The other part sets a conductivity detection device on the drum side. The conductivity detection device consists of two electrodes. The two electrodes are set asymmetrically relative to the rotation center of the drum to increase the possibility of contact between the electrodes and the clothes in the drum. This setting method is suitable for measuring when the drum rotates in a certain direction. When the drum rotates in another direction, the possibility of contact between the electrode plate and the clothes is reduced, so the measurement result at this time is discarded as an error or noise, or no measurement is performed in this rotation direction of the drum. Since the above scheme can only measure in one rotation direction of the drum, when the drum does not shake the clothes well, the types of clothes are complicated, the dryness and wetness of the clothes are uneven, etc., the robustness of the dryer in estimating the remaining drying time is obviously insufficient, and the remaining drying time provided to the user is inaccurate or there are problems such as jumps.

[0146] This embodiment B is based on the current humidity sensing component, and adds control over the drum, so that the drum rotates in multiple rotation states and measures humidity characteristic information in each rotation state. The humidity sensing component can refer to the setting method in the relevant technology, that is, the two electrode plates are asymmetrically set relative to the rotation center of the drum. Afterwards, multiple humidity characteristic information is obtained through multiple rotation states, and then the remaining drying time is calculated from the multiple humidity characteristic information. Among the above-mentioned multiple rotation states, there is at least one rotation state whose rotation direction is different from the rotation direction of the other rotation states. Therefore, this embodiment B takes into account the humidity characteristic information detected when the drum rotates in different rotation directions, and uses it as a factor affecting the remaining drying time. Furthermore, the humidity characteristic information is measured when the drum is at a constant rotation speed. Therefore, the remaining drying time calculated from multiple humidity characteristic information has higher accuracy.

[0147] It can be seen that the remaining drying time can be determined based on humidity, and the humidity sensing component can be used to detect humidity characteristic information; refer to Fig.10As shown, in the above determination method, in the above step S100, the operation index of the dryer is obtained in each rotation state, and the remaining drying time is determined according to the obtained multiple groups of operation indexes, including:

[0148] Step S140, when the motor controls the drum to rotate according to one of the rotation states, a set of humidity characteristic information of the humidity sensing component in the current rotation state is obtained;

[0149] Step S150, determining the remaining drying time according to the acquired multiple groups of humidity characteristic information.

[0150] In each rotation state, the drum / motor has a constant rotation speed, and a set of humidity characteristic information in a certain rotation state is obtained through the humidity sensing component, and then the remaining drying time is determined based on at least two sets of humidity characteristic information. In order to improve the accuracy of the remaining drying time, the number of sets of humidity characteristic information can be increased, and these humidity characteristic information can be calculated, such as weighted averaging or constructing nonlinear equations, etc., which are not limited here; accordingly, increasing the number of sets of humidity characteristic information leads to an increase in the time required to calculate the remaining drying time, so it can be considered to control the dryer to complete the target number of humidity characteristic information measurements within a period of time after the drying is started. For example, within the first 30 minutes of starting the drying process, the motor controls the drum to rotate according to three different rotation states, and three sets of humidity characteristic information are successively obtained, and then the remaining drying time is calculated based on these three sets of humidity characteristic information.

[0151] Based on the determination method of Example B, in some embodiments, referring to Fig.11 As shown, the above step S150 determines the remaining drying time according to the acquired multiple sets of humidity characteristic information, including:

[0152] Step S151, determining the weight value of the humidity characteristic information obtained under different rotation states;

[0153] Step S152, determining the remaining drying time according to more than three groups of humidity characteristic information and the weight value corresponding to each group of humidity characteristic information.

[0154] When multiple groups of humidity characteristic information are detected, weight values ​​can be set for each group of humidity characteristic information according to the rotation state and the order of the rotation state. For example, the humidity characteristic information obtained in the most recent detection can be set with a larger weight, and the humidity characteristic information obtained in the more distant detection can be set with a smaller weight; based on the multiple groups of humidity characteristic information and the corresponding weights, the remaining drying time can be calculated. It is worth noting that the weight in step S151 is not necessarily a value greater than 0 and less than 1. The weight here can be expressed as a coefficient. By setting an appropriate coefficient, the remaining drying time can also be calculated. Therefore, the weight / coefficient here is affected by multiple factors, such as the setting position of the electrode plate, the different rotation speeds of the rotation state, the execution timing of the rotation state, the sensitivity of the humidity sensing component, etc., which will affect the size of the weight / coefficient. Therefore, this embodiment does not limit the specific value of the weight / coefficient or the size relationship between them.

[0155] In a possible embodiment, the three sets of humidity characteristic information can be used to calculate the remaining drying time through the following formula:

[0156] RDT=a0+a1*EC1+a2*EC2+a3*EC3

[0157] Wherein, RDT is the remaining drying time, af is the aforementioned weight / coefficient, ECi is the humidity characteristic information measured in the i-th rotation state, 1≤i≤3. The above linear equation can directly calculate the remaining drying time RDT by setting appropriate weights / coefficients. Of course, the above calculation formula for the remaining drying time RDT is not unique, and the remaining drying time RDT can also be solved by forming a nonlinearly related equation based on the weight / coefficient and the humidity characteristic information, which is not limited here.

[0158] It is worth noting that the mass and water content of the clothes in the drum can also be calculated based on the humidity characteristic information, for example, referring to the following two formulas:

[0159] M f =b0+b1*EC1+b2*EC2+b3*EC3

[0160] M w =c0+c1*EC1+c2*EC2+c3*EC3

[0161] Among them, M f is the dry mass of the clothes in the drum, M w is the mass of water contained in the clothes in the drum, bi and ci are the aforementioned weights / coefficients, ECi is the humidity characteristic information measured in the i-th rotation state, 1≤i≤3. The dryness and wetness of the clothes in the drum are calculated by the humidity characteristic information and the corresponding appropriate weights / coefficients. It can be understood that the above dry mass Mf and the water mass M w These are two of the indicators that characterize the dryness or wetness of clothing. In fact, there are other indicators that characterize the dryness or wetness of clothing, such as the moisture content of clothing, which can be calculated by setting appropriate weights / coefficients. I will not give examples one by one here.

[0162] It can be understood that the three sets of humidity characteristic information obtained by measuring the three rotation states are used to solve the remaining drying time (as well as several indicators that characterize the degree of dryness and wetness of the clothes). Thereafter, multiple sets of humidity characteristic information can be measured in more rotation states. These humidity characteristic information can also be used to update the remaining drying time. For example, for every three consecutive rotation states, a new remaining drying time is calculated for every three sets of humidity characteristic information measured. For another example, each time one or more sets of humidity characteristic information is measured in one or more rotation states, they are combined with the previous remaining drying time to obtain a new remaining drying time.

[0163] The measured humidity characteristic information can be an instantaneous value, or a representative value can be calculated based on multiple humidity characteristic information measured over a period of time as the humidity characteristic information under the current rotation state to avoid measurement errors of the humidity characteristic information. Fig.12 As shown, in the above step S140, a set of humidity characteristic information of the humidity sensing component in the current rotation state is obtained, including:

[0164] Step S141, in the current rotation state, obtaining a plurality of signal values ​​detected by the humidity sensing component within a first preset detection time period;

[0165] Step S142, determining a typical humidity value according to the multiple signal values ​​as humidity characteristic information under the current rotation state.

[0166] The humidity sensing component continuously measures the first preset detection time length in the current rotation state of the drum, and the first preset detection time length is greater than the measurement cycle time length of the humidity sensing component, thereby obtaining multiple signal values ​​in the first preset detection time length, and these information values ​​reflect the change of the humidity of the clothes in the drum. For example, the rotation of the drum makes the clothes at different positions contact the humidity sensing component, resulting in a large difference between the several signal values ​​measured in the first preset detection time length. In order to overcome the measurement error, a humidity typical value is determined based on multiple signal values ​​as the humidity characteristic information in the current rotation state. The humidity typical value can be calculated in a variety of ways, such as simply averaging multiple signal values, or removing the maximum and minimum values ​​of multiple signal values ​​and then calculating the average value, etc., which are not limited here. It can be understood that the length of the first preset detection time length can be adjusted according to different rotation states. For example, when the rotation speed of the rotation state is slow, the actual duration of the first preset detection time length can be increased, and when the rotation speed of the rotation state is fast, the actual duration of the first preset detection time length can be shortened.

[0167] The determination method of Example B can be applied to different types of dryers, for example, a ventilation dryer, which includes a drum, a motor and an air supply duct, a fan (not driven by a motor) and a heating device are provided in the air supply duct, and a humidity sensing component is also provided at the drum. After the heating device heats the air in the air supply duct, the blower drives the impeller to send the heated air into the drum, and the air out of the drum is discharged to the external environment through the air outlet of the air supply duct; another example is applied to a condensing dryer, which includes a drum, a motor and an air supply duct, a blower impeller and a heating device are provided in the air supply duct, and a humidity sensing component is also provided at the drum. , after the heating device heats the air in the air supply duct, the impeller driven by the blower sends the heated air into the drum; wherein both the blower and the drum are driven by a motor; another example is applied to a heat pump dryer, which includes a drum, a motor and an air supply duct, in which a blower impeller and a condensation system are arranged, and a humidity sensing component is also arranged at the drum, after the heat release end of the condensation system heats the air in the air supply duct, the impeller driven by the blower sends the heated air into the drum, and the air coming out of the drum passes through the heat absorption end of the condensation system to precipitate moisture, and then circulates to the heat release end of the condensation system; wherein both the blower and the drum are driven by a motor. In the dryer of Example B, the humidity characteristic information is measured by the humidity sensing component, so other sensors such as weight sensors, torque sensors, etc. may not be arranged, and the remaining drying time can be directly obtained through the humidity characteristic information.

[0168] In addition, refer to Fig.13 As shown, the embodiment of the present application also provides a method for displaying the remaining drying time, which is applied to a dryer. The display method includes but is not limited to the following steps:

[0169] Step S510, when a drying operation instruction is received, the initial remaining drying time is displayed;

[0170] Step S520, executing the method for determining the remaining drying time in any of the above embodiments to obtain the target remaining drying time;

[0171] Step S530, displaying the target remaining drying time.

[0172] When the dryer receives a drying operation instruction, it determines an initial drying time according to the drying operation instruction. This initial drying time can be preset (for example, the dryer presets multiple drying modes, each drying mode corresponds to an initial drying time, and the drying operation instruction is an instruction to instruct the dryer to execute a certain drying mode), or it can be set by the user (for example, the dryer provides a function for users to customize the drying time, the user sets a drying time according to their own needs, and the dryer generates a drying operation instruction based on the drying time). The initial remaining drying time usually cannot accurately inform the user of the actual drying time, because the dryer cannot determine the wet length of the clothes placed in the drum. Therefore, during the drying process, a more accurate target remaining drying time is determined based on the operating indicators of the dryer.

[0173] The display method of the embodiment of the present application executes the determination method of the remaining drying time of one of the aforementioned embodiments after starting the drying, estimates the target remaining drying time, and then displays the target remaining drying time to the user. The determination method of the aforementioned embodiment can control the drum to rotate according to three different rotation states, and estimate the target remaining drying time based on multiple sets of operating parameters of the motor or multiple sets of humidity characteristic information of the humidity sensing component. The target remaining drying time is more accurate than the calculation result of the remaining drying time calculated by the prior art, so it can provide the user with a more accurate remaining drying time, and can also ensure the operating stability of the dryer to a certain extent.

[0174] Reference Fig.14 As shown, in one embodiment, the display method further includes:

[0175] Step S540: displaying the target remaining drying time through the display panel of the dryer, and / or sending a prompt message for prompting the target remaining drying time to the target mobile terminal.

[0176] In addition to the aforementioned drum, motor and air supply duct, the dryer of this embodiment also includes a display panel for displaying the remaining drying time. The display panel can be an LED digital screen or a display screen such as an LCD (Liquid Crystal Display). After estimating the target remaining drying time, the target remaining drying time is updated to the display panel to replace the last displayed remaining drying time. Alternatively, after estimating the target remaining drying time, the target remaining drying time is sent to the target mobile terminal via the network, for example, the target remaining drying time is sent to the user's mobile phone via the Internet, or sent to the user's control terminal via the home Internet of Things, etc., without limitation here.

[0177] It is worth noting that the embodiment of the present application updates the target remaining drying time at different times, which can be implemented in the following manner: the dryer displays the initial remaining drying time when the drying is started, and then controls the drum to rotate according to multiple different rotation states through the motor. For example, the motor controls the drum to rotate in three different rotation states. When the drum completes the rotation of three different rotation states within a period of time after the drying is started, three sets of operating indicators are obtained to calculate the target remaining drying time, and the calculated target remaining drying time is displayed instead of the initial remaining drying time. This is the first update of the remaining drying time. The motor continues to control the drum to rotate according to different rotation states in the subsequent process to update the remaining drying time. For example, starting from the fourth rotation state, the target remaining drying time is updated every three rotation states. For another example, starting from the fourth rotation state, the target remaining drying time is updated every rotation state. When the remaining drying time is being displayed and updated, it is easy to be observed on the display panel of the dryer, or the target mobile terminal is prompted that the remaining drying time has been updated.

[0178] In addition, an embodiment of the present application also provides a device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the method for determining the remaining drying time as in the aforementioned embodiment or the method for displaying the remaining drying time as in the aforementioned embodiment.

[0179] An embodiment of the present application also provides a drying device, comprising the aforementioned device.

[0180] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network nodes. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0181] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer-readable storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer-readable storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer-readable storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0182] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method for determining the remaining drying time, characterized in that: include: In the drying stage, the drum of the dryer is controlled to rotate according to a plurality of different rotation states, wherein the rotation state represents the rotation direction of the drum and the stable rotation speed in the rotation direction; The operation index of the dryer is obtained in each rotation state, and the remaining drying time is determined according to the obtained multiple groups of the operation indexes.

2. The determination method according to claim 1, characterized in that: The dryer includes an air supply duct and a motor for driving the drum to rotate, and the operating index includes an operating parameter of the motor; the operating index of the dryer is obtained in each rotation state, and the remaining drying time is determined according to the obtained multiple groups of operating indexes, including: When the motor controls the drum to rotate according to one of the rotation states, a set of operating parameters of the motor in the current rotation state is obtained; Determining a drying influencing parameter according to the at least two groups of the operating parameters obtained, the drying influencing parameter comprising an air blocking index representing a blocking level of the air supply duct and a load characteristic index representing a load size in the drum; The remaining drying time is determined according to the drying influencing parameters.

3. The determination method according to claim 2, characterized in that: The load characteristic index includes a first quality parameter representing the drying quality of the clothes in the drum and a second quality parameter representing the quality of water contained in the clothes in the drum; Determining the drying influencing parameter according to the acquired at least two groups of operating parameters includes: Taking the first quality parameter, the second quality parameter and the air blocking index as unknowns, constructing a corresponding relationship between the drying influencing parameter and the operating parameter; The first quality parameter, the second quality parameter and the air blockage index are determined according to the three or more groups of operating parameters and the corresponding relationship between the drying influencing parameters and the operating parameters.

4. The determination method according to claim 3, characterized in that: The determining the remaining drying time according to the drying influencing parameter comprises: The remaining drying time is determined according to the first quality parameter, the second quality parameter and the air blockage index.

5. The determination method according to claim 2, characterized in that: The load characteristic index includes a third mass parameter representing the total mass of the clothes in the drum and a moisture content representing the moisture content of the clothes in the drum; Determining the drying influencing parameters according to the acquired multiple groups of operating parameters includes: Taking the third quality parameter, the moisture content and the air blocking index as unknowns, constructing a corresponding relationship between the drying influencing parameter and the operating parameter; The third quality parameter, the moisture content and the air blocking index are determined according to the three or more groups of operating parameters and the corresponding relationship between the drying influencing parameters and the operating parameters.

6. The determination method according to claim 5, characterized in that: The determining the remaining drying time according to the drying influencing parameter comprises: The remaining drying time is determined according to the third quality parameter, the moisture content and the air blocking index.

7. The determination method according to claim 1, characterized in that: The dryer comprises a humidity sensing component disposed on the drum and a motor for driving the drum to rotate, and the operating index comprises humidity characteristic information detected by the humidity sensing component; The step of obtaining the operating index of the dryer in each rotation state and determining the remaining drying time according to the obtained multiple groups of operating indexes includes: When the motor controls the drum to rotate according to one of the rotation states, a set of humidity characteristic information of the humidity sensing component in the current rotation state is obtained; The remaining drying time is determined according to the acquired multiple groups of humidity characteristic information.

8. The determination method according to claim 7, characterized in that: The determining the remaining drying time according to the acquired multiple groups of humidity characteristic information includes: Determining a weight value of the humidity characteristic information obtained under different rotation states; The remaining drying time is determined according to the three or more groups of humidity characteristic information and the weight values ​​corresponding to the respective groups of humidity characteristic information.

9. The determination method according to claim 7, characterized in that: The step of obtaining a set of humidity characteristic information of the humidity sensing component in the current rotation state includes: In the current rotation state, obtaining a plurality of signal values ​​detected by the humidity sensing component within a first preset detection time period; A typical humidity value is determined according to the multiple signal values ​​as humidity characteristic information under the current rotation state.

10. The determination method according to any one of claims 1 to 9, characterized in that: Among the plurality of rotation states, at least one rotation state has a rotation direction opposite to the rotation directions of the other rotation states, and the drum rotates continuously for at least a first number of turns in each rotation state.

11. The determination method according to any one of claims 1 to 9, characterized in that: The dryer further includes a motor for driving the drum to rotate; and the determination method further includes: When it is necessary to control the drum to switch from the first rotation state to the second rotation state, adjusting the operating parameters of the motor according to the second rotation state; Detect the rotation speed of the drum and / or the rotation speed of the motor, and when the rotation speed of the drum and / or the rotation speed of the motor is stable within the expected speed range corresponding to the second rotation state within a second preset detection time period, determine that the drum enters the second rotation state.

12. The determination method according to any one of claims 1 to 9, characterized in that: The controlling the drum of the dryer to rotate in a plurality of different rotation states includes: During a first operation period when the drying process is started, the drum is controlled to rotate in at least three different rotation states.

13. The determination method according to claim 12, characterized in that: The determination method further comprises: When the drum is controlled to rotate according to the three different rotation states, the target remaining drying time is determined according to the three groups of operation indicators obtained.

14. The determination method according to claim 13, characterized in that: After determining the target remaining drying time, the determination method further includes: controlling the drum to rotate according to at least one of the rotation states; The target remaining drying time is updated according to at least one set of the acquired operation indicators.

15. The determination method according to claim 14, characterized in that: The determination method further comprises: When the target remaining drying time is less than the preset time, the target remaining drying time is no longer updated.

16. A method for displaying the remaining drying time, applied to a drying machine, characterized in that: The display method comprises: When receiving the drying operation command, the remaining time of initial drying is displayed; Execute the method for determining the remaining drying time according to any one of claims 1 to 15 to obtain a target remaining drying time; The target remaining drying time is displayed.

17. The display method according to claim 16, characterized in that: The display method further includes: The target remaining drying time is displayed through the display panel of the dryer, and / or prompt information for prompting the target remaining drying time is sent to the target mobile terminal.

18. A device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the determination method according to any one of claims 1 to 15 or the display method according to any one of claims 16 to 17 when executing the computer program.

19. A drying device, characterized in that: Comprising the apparatus of claim 18.

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