CN113774625A

CN113774625A - Drum drying method and device for drum washing machine, drum washing machine and storage medium

Info

Publication number: CN113774625A
Application number: CN202111162319.0A
Authority: CN
Inventors: 耿斌
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-12-10

Abstract

The present disclosure relates to a drum drying method and device for a drum washing machine, a drum washing machine and a storage medium, wherein the method comprises the following steps: detecting whether a cylinder air-drying starting condition is met currently, wherein the cylinder air-drying starting condition comprises that no washing object exists in the washing cylinder; and under the condition that the air drying starting condition is determined to be met, controlling the fan and the heater to start. The scheme utilizes the fan to generate air flow in the air duct, the air blown in by the fan is heated by the heater, the heated air enters the washing drum and then absorbs the moisture on the surface of the washing drum to become humid air, the condenser is utilized to condense the humid air, the air in the washing machine continuously circulates through the fan, the heater, the washing drum and the condenser, and therefore the moisture on the surface of the washing drum is subjected to hot air drying, and the problem that the air cannot be dried by the residual moisture on the surface of the washing drum due to the strong sealing property of the drum washing machine is solved.

Description

Drum drying method and device for drum washing machine, drum washing machine and storage medium

Technical Field

The present disclosure relates to the field of laundry technologies, and in particular, to a drum drying method and apparatus for a drum washing machine, and a storage medium.

Background

At present, the types of washing machines commonly found on the market are pulsator washing machines and drum washing machines, wherein the drum washing machines have higher sealing performance than the pulsator washing machines, and all washing procedures must be performed in a fully sealed condition. When all washing procedures are finished, after a user takes clothes away from the washing machine, redundant moisture remains on the surface of a washing drum of the washing machine, the impeller washing machine can take away residual moisture in the drum by means of air flow between the inside and the outside of the washing machine, so that the washing drum is dried, and the drum washing machine cannot dry the residual moisture on the washing drum due to natural strong sealing property. Moisture remains in the cylinder for a long time, which is easy to generate peculiar smell in a dark and humid environment and breed mildew.

Disclosure of Invention

To overcome the problems in the related art, the present disclosure provides a drum drying method and apparatus for a drum washing machine, and a storage medium.

According to a first aspect of embodiments of the present disclosure, there is provided a drum drying method of a drum washing machine including a washing drum for accommodating laundry and a drum drying system including a fan, a heater, and a condenser, the fan and the heater being installed in an air duct, the method including:

detecting whether a cylinder air-drying starting condition is met currently, wherein the cylinder air-drying starting condition comprises that no washing object exists in the washing cylinder;

under the condition that the air drying starting condition is determined to be met, the fan and the heater are controlled to be started;

after the fan and the heater are started, the fan blows dry air towards the heater, the dry air is heated by the heater and then becomes hot air, the hot air is introduced into the washing drum through the air outlet of the air duct, the hot air absorbs moisture on the surface of the washing drum and becomes humid air, the humid air is introduced into the condenser, the moisture in the humid air is condensed by the condenser to form condensed water, and the humid air with the moisture removed is changed into dry air, extracted by the fan and blown towards the heater again.

In an optional embodiment, the washing drum comprises an outer drum and a rotatable inner drum arranged inside the outer drum and used for accommodating washings, the inner drum is sleeved on a driving shaft of a drum motor, and a weight sensor is arranged at the joint of the inner drum and the driving shaft and used for detecting the weight of the washings in the inner drum; whether the detection meets the cylinder air-drying starting condition currently or not comprises the following steps:

acquiring the real-time weight detected by the weight sensor after the preset washing program is finished;

when the real-time weight is lower than the preset weight and a drum door of the drum washing machine is in a closed state, determining that a drum air drying starting condition is met currently; wherein the preset weight is determined based on a weight generated on the weight sensor when there is no laundry in the drum.

In an alternative embodiment, the washing drum includes an outer drum and a rotatable inner drum arranged inside the outer drum for accommodating the washings, and the detecting whether the drum air-drying starting condition is met currently includes:

after a preset washing program is finished, driving the inner cylinder to rotate for a preset time, and collecting an actual rotating speed curve of the inner cylinder in the rotating process;

matching the actual rotating speed curve with a preset reference rotating speed curve, wherein the reference rotating speed curve represents the rotating speed curve of the inner barrel under the condition that no washing is in the inner barrel;

and when the matching degree of the actual rotating speed curve and the reference rotating speed curve is higher than a preset matching threshold value and a drum door of the drum washing machine is in a closed state, determining that the drum air-drying starting condition is currently met.

In an optional embodiment, the detecting whether the barrel air-dry starting condition is met currently comprises:

when a drying starting instruction is detected and a drum door of the drum washing machine is determined to be in a closed state, determining that a drum drying starting condition is currently met, wherein the drying starting instruction is generated according to a starting operation which is performed on an operation panel of the drum washing machine aiming at a drum drying program under the condition that a user does not have washing in a washing drum.

In an alternative embodiment, a first temperature sensor is arranged at the air outlet of the air duct, and is used for detecting the temperature of the hot air entering the washing drum from the air outlet; the method further comprises the following steps:

acquiring real-time temperature detected by the first temperature sensor;

and when the real-time temperature is higher than the upper limit value of a first preset temperature range, controlling the heater to be closed, and when the real-time temperature is lower than the lower limit value of the first preset temperature range, controlling the heater to be started.

In an alternative embodiment, a first temperature sensor is arranged at the air outlet of the air duct for detecting the temperature of the hot air entering the washing drum from the air outlet, the washing drum comprises an outer drum and a rotatable inner drum arranged inside the outer drum for accommodating washings, and a second temperature sensor is arranged in an interlayer between the outer drum and the inner drum for detecting the temperature of the wet air entering the condenser from the inner drum; the method further comprises the following steps:

acquiring a first real-time temperature detected by the first temperature sensor and a second real-time temperature detected by the second temperature sensor;

obtaining a first control instruction according to the first real-time temperature; when the first real-time temperature is higher than a preset temperature protection threshold value, the first control instruction is a closing instruction;

obtaining a second control instruction according to the second real-time temperature; when the second real-time temperature is higher than the upper limit value of a second preset temperature range, the second control instruction is a closing instruction, and when the second real-time temperature is lower than the lower limit value of the second preset temperature range, the second control instruction is an opening instruction;

and controlling the heater according to the first control instruction and the second control instruction, wherein when one of the first control instruction and the second control instruction is a closing instruction, the heater is closed.

In an optional embodiment, the method further comprises:

starting timing after controlling the fan and the heater to start;

and when the timing time reaches a preset timing time or an air drying end instruction is detected, controlling the fan and the heater to stop, wherein the air drying end instruction is generated according to the stop operation of a user on an operation panel of the drum washing machine for a drum air drying program.

In an alternative embodiment, the washing drum includes an outer drum and a rotatable inner drum disposed inside the outer drum for accommodating the laundry, and the controlling the blower and the heater to be activated includes:

controlling the fan and the heater to start under the condition that the inner barrel does not rotate; alternatively, the first and second electrodes may be,

and driving the inner barrel to continuously rotate along the same direction, and controlling the fan and the heater to start under the condition that the inner barrel continuously rotates.

According to a second aspect of the embodiments of the present disclosure, there is provided a drum drying device of a drum washing machine, the drum washing machine comprising a washing drum for accommodating laundry and a drum drying system, the drum drying system comprising a fan, a heater and a condenser, the fan and the heater being mounted in an air duct; the device comprises:

the starting detection module is used for detecting whether a cylinder air-drying starting condition is met or not at present, wherein the cylinder air-drying starting condition comprises that no washing object exists in the washing cylinder;

the cylinder air drying starting control module is used for controlling the fan and the heater to start under the condition that cylinder air drying starting conditions are met;

According to a third aspect of the disclosed embodiments, there is provided a drum washing machine including:

a washing drum for accommodating washings;

the cylinder air drying system comprises a fan, a heater and a condenser, wherein the fan and the heater are arranged in an air duct;

the control device is respectively connected with the fan and the heater and is used for:

According to a fourth aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the drum drying method of a drum washing machine provided by the first aspect of the present disclosure.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

this technical scheme utilizes the fan to produce the air current in the wind channel, utilize the heater to heat the air that the fan insufflates, the air after the heating absorbs the moisture on washing section of thick bamboo surface behind getting into the washing section of thick bamboo, become humid air, humid air is behind the condenser condensation, moisture wherein is got rid of, humid air becomes dry air again, then by the fan extraction, get into the wind channel and heat, become hot-air insufflates into in the washing section of thick bamboo once more, consequently, the air in the drum type washing machine passes through the fan, the heater, the washing section of thick bamboo and condenser circulate continuously, from this carry out hot air drying with the moisture on washing section of thick bamboo surface, thereby solved because drum type washing machine has strong leakproofness, can't carry out air-dried problem to the remaining moisture on washing section of thick bamboo surface.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a schematic view of a drum washing machine according to an exemplary embodiment;

FIG. 2 is a flow chart illustrating a drum drying method of a drum washing machine according to an exemplary embodiment;

fig. 3 is a flowchart according to step S201 in fig. 2;

fig. 4 is a further flowchart according to step S201 in fig. 2;

FIG. 5 is yet another flow chart illustrating a drum drying method of a drum washing machine according to an exemplary embodiment;

FIG. 6 is a schematic view of a drum drying device of a drum washing machine according to an exemplary embodiment;

fig. 7 is still another schematic view of the drum washing machine according to an exemplary embodiment.

Icon:

100-drum washing machine; 110-a washing drum; 121-a fan; 122-a heater; 123-a condenser; 111-outer cylinder; 112-inner cylinder; 131-a first temperature sensor; 132-second temperature sensor.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

In view of the technical problems in the prior art, the embodiment of the present application provides a drum drying method for a drum washing machine. Fig. 1 shows a schematic view of a drum washing machine according to an embodiment of the present application, and as shown in fig. 1, a drum washing machine 100 includes: the washing drum 110 is used for accommodating washings, and the drum air drying system comprises a fan 121, a heater 122 and a condenser 123, wherein the fan 121 and the heater 122 are installed in an air duct, an air inlet of the air duct is connected to the condenser 123, an air outlet of the air duct is connected to the washing drum 110, and the condenser 123 is connected between the washing drum 110 and the air duct. The blower 121 is configured to blow air toward the heater 122 to form an air flow within the wind tunnel, the heater 122 is used to heat air blown from the blower 121 toward the washing tub 110, and the condenser 123 is used to condense moisture in air introduced from the washing tub 110.

Fig. 2 is a flowchart of a drum drying method of a drum washing machine according to an embodiment of the present application, please refer to fig. 2, which includes:

s201, detecting whether the current air-dry starting condition is met.

And S202, controlling the fan and the heater to start under the condition that the air drying starting condition is met.

As shown in fig. 1, the drum drying operation principle of the drum washing machine 100 is as follows: after the blower 121 and the heater 122 are started, the blower 121 blows cold dry air towards the heater 122, the dry air flows through the heater 122, the dry air is heated by the heater 122 to become hot air, the hot air is introduced into the washing drum 110 through the air outlet of the air duct, the hot air absorbs moisture on the surface of the washing drum 110 to become hot humid air, the humid air is introduced into the condenser 123 from the washing drum 110, cold water enters from the water inlet of the condenser 123, when the hot and humid air is sufficiently contacted with the cold water, the moisture in the air is condensed to form condensed water, the condensed water flows into the bottom of the washing drum along with the cold water and is discharged out of the washing machine, after the moisture in the humid air is removed, the humid air becomes dry air again, the wet air is then sucked by the blower 121, enters the air duct to be heated, the hot air is blown into the washing drum 110 again, and therefore, the air in the washing machine passes through the blower 121, The heater 122, the washing drum 110, and the condenser 123 are continuously circulated, thereby hot-air drying the moisture on the surface of the washing drum 110.

It is expressly noted that in the present embodiment, dry air is dry with respect to wet air, which is humid with respect to dry air.

Wherein, the drum air-drying starting condition comprises that no washing is in the washing drum.

Wherein, whether detect in S201 and satisfy a section of thick bamboo air-drying starting condition at present, include: after the preset washing program is finished, whether the washing barrel has the washings or not is identified, and when the washing barrel has no washings and the barrel door of the drum washing machine is in a closed state, the current requirement on the barrel air-drying starting condition is determined. Wherein, the preset washing program may be a dehydrating program or a drying program.

In the embodiment of the application, the washing drum comprises an outer drum and a rotatable inner drum arranged on the inner side of the outer drum and used for accommodating washings, the inner drum is sleeved on a driving shaft of a drum motor, and the drum motor is used for driving the inner drum to rotate through the driving shaft.

In an alternative embodiment, a weight sensor is provided at the connection of the inner drum and the drive shaft, which weight sensor is used to detect the weight of the laundry in the inner drum. As shown in fig. 3, the step S201 of detecting whether the current cylinder air-dry starting condition is met includes:

s301, after the preset washing program is finished, acquiring the real-time weight detected by the weight sensor.

Wherein, the preset washing program may be a dehydrating program or a drying program.

S302, when the real-time weight is lower than the preset weight and the drum door of the drum washing machine is in a closed state, it is determined that the drum air-drying starting condition is currently met. Wherein the preset weight is determined based on a weight generated on the weight sensor when there is no laundry in the drum.

And when the real-time weight is not lower than the preset weight or a drum door of the drum washing machine is in an opening state, determining that the drum drying starting condition is not met currently.

It can be understood that when there is no washings in the inner drum, the self weight of the inner drum extrudes the weight sensor to obtain a basis weight, when there are washings in the inner drum, the inner drum will obviously sink under the superposition of the self weight of the inner drum and the weight of the washings, the superposed weight can generate a stronger extrusion to the weight sensor, the obtained weight value is obviously greater than the basis weight, therefore, after the drum washing machine has executed the dehydration program or the drying program, whether the user takes away the washed clothing from the inner drum can be accurately identified through the weight change measured by the weight sensor, when the real-time weight detected by the weight sensor is lower than the preset weight, the user is considered to take away the washed clothing from the inner drum, if the drum door of the drum washing machine is in the closed state at this moment, the air drying starting condition of the drum is currently satisfied, the fan and the heater can be started to dry the residual water on the surface of the inner drum of the washing machine, prevent the generation of peculiar smell and mould.

In yet another alternative embodiment, as shown in fig. 4, the step S201 of detecting whether the cylinder air-dry starting condition is currently met includes:

s401, after the preset washing program is finished, driving the inner cylinder to rotate for a preset time, and collecting an actual rotating speed curve of the inner cylinder in the rotating process.

Wherein, the preset washing program may be a dehydrating program or a drying program. And after the dehydration program or the drying program is finished, driving the inner cylinder to continuously rotate for N seconds at a preset speed, and acquiring the rotating speed of the inner cylinder in the N second rotating process to obtain an actual rotating speed curve. It should be noted that a reference rotation speed curve is preset in the program, and the reference rotation speed curve is a curve obtained by driving the inner cylinder to rotate continuously for N seconds at the same preset speed under the condition that no laundry exists in the inner cylinder in advance and collecting the rotation speed of the inner cylinder in the N second rotation process.

And S402, matching the actual rotating speed curve with a preset reference rotating speed curve.

And S403, when the matching degree of the actual rotating speed curve and the reference rotating speed curve is higher than a preset matching threshold value and the drum door of the drum washing machine is in a closed state, determining that the drum air-drying starting condition is currently met.

It can be understood that, under the condition that there is laundry and there is no laundry in the inner drum, the obtained rotation speed curve is obviously different, after the drum washing machine has executed the dehydration program or the drying program, the actual rotation speed curve is obtained by driving the inner drum to rotate, then the actual rotation speed curve is matched with the preset reference rotation speed curve, whether the user takes the washed clothes from the inner drum can be accurately identified, when the actual rotation speed curve is matched with the reference rotation speed curve, the user is considered to take the washed clothes from the inner drum, if the drum door of the drum washing machine is in the closed state at this time, it is judged that the drum air drying starting condition is currently satisfied, and the fan and the heater can be started to dry the residual moisture on the surface of the inner drum of the washing machine.

In yet another alternative embodiment, an operation panel is provided on the housing of the drum washing machine, and a user can select various washing programs, such as a cleaning program, a rinsing program, a dehydrating program, a drum drying program, etc., on the operation panel, and when the user removes laundry from the inner drum, the user actively makes a starting operation for the drum drying program on the operation panel, thereby generating a drying starting instruction. Detecting whether the current cylinder air-dry starting condition is met in 201 comprises: and when the air-dry starting instruction is detected and the drum door of the drum washing machine is determined to be in a closed state, determining that the drum air-dry starting condition is currently met. In a specific example, after the dehydration process is completed, the user removes the dehydrated laundry from the inner tub, selects a middle tub drying process on the operation panel, presses the start button, and then the control device in the drum washing machine automatically controls the fan and the heater to start to dry the residual moisture on the surface of the inner tub of the washing machine.

It should be noted that, the above various embodiments may be combined with each other, that is, when it is determined that the real-time weight measured by the weight sensor is lower than the preset weight, or the matching degree of the actual rotating speed curve and the reference rotating speed curve is higher than the preset matching threshold, or the dry start instruction is detected, and it is determined that the drum dry start condition is currently satisfied when the drum door of the drum washing machine is in the closed state.

It should be noted that, in the case that it is determined that the drum drying start condition is currently satisfied, controlling the start of the blower and the heater includes: controlling the starting of the fan and the heater under the condition that the inner cylinder does not rotate; or, the inner barrel is driven to rotate continuously along the same direction, and the fan and the heater are controlled to be started under the condition that the inner barrel rotates continuously. In the conventional washing procedures, such as a cleaning procedure, a rinsing procedure, a drying procedure and the like, in order to achieve the corresponding purposes, the inner cylinder needs to rotate in a positive and negative rotation mode, and in the cylinder air drying procedure, because the inner cylinder is not blocked by clothes, hot air entering the inner cylinder from the air outlet can be fully contacted with the surface of the inner cylinder, so that the starting of a fan and a heater can be controlled under the condition that the inner cylinder does not rotate, or the inner cylinder can be driven to rotate continuously along the same direction, thereby enhancing the circulation of air, enabling the surface of the inner cylinder to be heated uniformly and accelerating the air drying time of the cylinder.

In an alternative embodiment, after the fan and the heater are controlled to be started, timing is started, and when the timing time reaches a preset timing time, the fan and the heater are controlled to be stopped. The timing time can be set to be 5-10 minutes, so that the cylinder air drying program can be automatically finished when the timing time reaches the preset 5 minutes. In addition, when the user actively makes a stop operation for the drum seasoning program on the operation panel, a seasoning end instruction is generated, and when the seasoning end instruction is detected, the blower and the heater are controlled to stop. For example, when the drum washing machine is in the drum drying program running state, the user clicks a stop button on the operation panel, and then the control device in the drum washing machine automatically controls the fan and the heater to stop, thereby ending the drum drying program. Wherein the stop button may be the previous start button, both may be multiplexed on the same button, or a separate stop button, or a power switch button.

In an optional embodiment, in order to accurately control the air temperature in the inner barrel, the temperature in the barrel is kept in a reasonable range higher than the external environment temperature of the washing machine, the inner barrel is dried more quickly, a first temperature sensor is arranged at the air outlet of the air duct, and the first temperature sensor detects the air temperature of hot air entering the inner barrel from the air outlet in the process that the hot air is blown into the inner barrel from the air outlet of the air duct. A first predetermined temperature range is preset, and the first predetermined temperature range is, for example, 60 to 80 ℃. In the operation process of the cylinder air drying program, the real-time temperature detected by the first temperature sensor is acquired, when the real-time temperature detected by the first temperature sensor is higher than the upper limit value of the first preset temperature range, the temperature of hot air entering the inner cylinder is higher, the heater is controlled to be turned off, the heater, the air channel and the inner cylinder are prevented from being damaged by overhigh temperature, and the function of a protection component is achieved. In one example, it is achieved that the heater is switched off when the air temperature of the air outlet is above 80 ℃ and is switched on when the air temperature of the air outlet is below 60 ℃ after the heater is switched off.

It should be noted that the temperature measured by the temperature sensor disposed at the air outlet is the temperature of the air entering the inner drum from the air outlet, and cannot truly reflect the actual temperature in the drum, and usually, the temperature is higher than the actual temperature in the drum.

In an optional embodiment, a first temperature sensor is arranged at the air outlet of the air duct, the first temperature sensor is used for detecting the air temperature of hot air entering the inner barrel from the air outlet, the hot air is changed into damp and hot air after absorbing moisture in the inner barrel, the damp and hot air enters the interlayer between the inner barrel and the outer barrel from the inner barrel, and introduced into the condenser from the interlayer, a second temperature sensor is arranged in the interlayer of the outer cylinder and the inner cylinder, wherein, the second temperature sensor can be arranged at a position close to the condenser in the interlayer, the second temperature sensor is used for detecting the air temperature of the damp and hot air entering the condenser from the inner cylinder, the air temperature detected by the second temperature sensor is closer to the real temperature in the cylinder, therefore, the real-time temperature measured by the first temperature sensor is used for protecting the washing machine equipment, and the real-time temperature measured by the second temperature sensor is used for controlling the on and off of the heater.

Specifically, referring to fig. 5, the method further includes:

s501, acquiring a first real-time temperature detected by a first temperature sensor and a second real-time temperature detected by a second temperature sensor.

S502, a first control instruction is obtained according to the first real-time temperature and a second control instruction is obtained according to the second real-time temperature.

When the first real-time temperature is higher than a preset temperature protection threshold value, the first control instruction is a closing instruction.

When the second real-time temperature is higher than the upper limit value of the second preset temperature range, the second control instruction is a closing instruction, and when the second real-time temperature is lower than the lower limit value of the second preset temperature range, the second control instruction is an opening instruction.

When the first real-time temperature (reflecting the air temperature of the air outlet) is higher than a preset temperature protection threshold value, a closing instruction is generated for indicating to close the heater, and when the first real-time temperature is not higher than the temperature protection threshold value, an opening state maintaining instruction is generated for indicating to maintain the heater in an opening state. It is noted that the temperature protection threshold is higher than the upper limit value of the second preset temperature range. As an example, the temperature protection threshold can be set within 100-115 ℃.

And when the second real-time temperature (reflecting the real temperature of the inner cylinder) is higher than the upper limit value of the second preset temperature range, generating a closing instruction for indicating to close the heater, when the second real-time temperature is lower than the lower limit value of the second preset temperature range, generating an opening instruction for indicating to open the heater, and when the second real-time temperature is not higher than the upper limit value of the second preset temperature range and is not lower than the lower limit value of the second preset temperature range, generating an opening state maintaining instruction for indicating to maintain the heater in an opening state. As an example, the second preset temperature range may be set to 50 to 60 ℃.

And S503, controlling the heater according to the first control command and the second control command, wherein when one of the first control command and the second control command is a closing command, the heater is closed.

After the first control instruction and the second control instruction are obtained, a target control instruction is determined according to the first control instruction and the second control instruction, and the heater is controlled according to the target control instruction. And determining a target control instruction from the first control instruction and the second control instruction by taking the closing instruction as the highest priority, namely when one of the first control instruction and the second control instruction is the closing instruction, the target control instruction is the closing instruction, and then controlling the heater to be closed.

In a specific example, when the first control instruction is a closing instruction and the second control instruction is a closing instruction, the heater is controlled to be closed; when the first control instruction is a closing instruction and the second control instruction is an opening instruction, controlling the heater to be closed; when the first control instruction is a closing instruction and the second control instruction is a keeping opening state instruction, the heater is controlled to be closed; when the first control instruction is a command for maintaining the opening state and the second control instruction is a command for closing, the heater is controlled to be closed; when the first control instruction is a command for maintaining the starting state and the second control instruction is a command for starting, controlling the heater to be started; and when the first control instruction is a keep-on state instruction and the second control instruction is a keep-on state instruction, controlling the heater to be kept in an on state.

It can be understood that, when the first control command is a close command, it indicates that the air temperature at the air outlet has exceeded the preset temperature protection threshold, and at this time, the heater is controlled to be closed regardless of which command the second control command is, and when the first control command is a maintain-on command, it indicates that the air temperature at the air outlet has not exceeded the preset temperature protection threshold, and at this time, the heater is controlled accordingly based on the command content of the second control command.

It should be noted that normally, although the first real-time temperature measured by the air outlet is higher than the second real-time temperature measured by the interlayer of the inner and outer cylinders, the hot air at the air outlet will circulate in the inner cylinder under the action of the air flow generated by the fan, so the difference between the first real-time temperature and the second real-time temperature is not too large. When the abnormal working condition that the fan does not rotate and the heater continuously heats occurs, particularly after the fan does not rotate for a period of time, the temperature of the air outlet is sharply increased, since no airflow continuously flows in the inner cylinder, the temperature of the inner cylinder is gradually reduced, the difference between the first real-time temperature and the second real-time temperature is gradually increased, and even the situation that the first real-time temperature exceeds the preset temperature protection threshold value and the second real-time temperature is lower than the lower limit value of the second preset temperature range may occur, in this case, the closing command will be obtained on the basis of a first real-time temperature, the opening command will be obtained on the basis of a second real-time temperature, and, when the two commands conflict, and one of the air channels is a closing instruction, the heater is controlled to be closed, so that the damage to parts and equipment caused by abnormal rise of the temperature in the air channel is prevented, and the equipment is protected.

In summary, according to the drum air drying method of the drum washing machine provided by the embodiment of the present application, the blower is used to generate the air flow in the air duct, the heater is used to heat the air blown by the blower, the heated air absorbs the moisture on the surface of the washing drum and then becomes the humid air, the humid air is condensed by the condenser, the moisture in the humid air becomes the condensed water and is discharged out of the washing machine, the humid air with the moisture removed becomes the dry air again, then the dry air is extracted by the blower, enters the air duct to be heated, and is blown into the washing drum again as the hot air, therefore, the air in the drum washing machine continuously circulates through the blower, the heater, the washing drum and the condenser, and the moisture on the surface of the washing drum is subjected to hot air drying, so that the problem that the residual moisture on the surface of the washing drum cannot be dried due to strong sealing performance of the drum washing machine is solved.

In addition, the rotating speed curve obtained by the weight sensor or the inner drum after being driven to rotate can be used for accurately identifying whether the user takes the washed clothes from the inner drum or not, so that the air drying program is automatically executed after the user takes the clothes, the manual intervention of the user is reduced, and the air drying program is almost senseless to the user.

In addition, the first temperature sensor and the second temperature sensor can effectively prevent the abnormal rise of the temperature in the air duct from damaging components and equipment, thereby protecting the equipment of the washing machine, accurately controlling the temperature of the air in the inner barrel within a reasonable range higher than the external environment temperature of the washing machine and drying the inner barrel more quickly.

Based on the same inventive concept, the embodiment of the present disclosure provides a drum air drying device of a drum washing machine, wherein the drum washing machine comprises a washing drum for accommodating washings and a drum air drying system, the drum air drying system comprises a fan, a heater and a condenser, and the fan and the heater are installed in an air duct. Referring to fig. 6, the apparatus 600 includes:

a start detection module 610, configured to detect whether a drum drying start condition is currently met, where the drum drying start condition includes that no laundry is in the washing drum;

and a cylinder air drying starting control module 620, configured to control the blower and the heater to start up when it is determined that the cylinder air drying starting condition is met.

Optionally, the washing drum includes an outer drum and a rotatable inner drum arranged inside the outer drum and used for accommodating the washings, the inner drum is sleeved on a driving shaft of the drum motor, and a weight sensor is arranged at a joint of the inner drum and the driving shaft and used for detecting the weight of the washings in the inner drum. The start detection module 610 is configured to:

Optionally, the washing drum comprises an outer drum and a rotatable inner drum arranged inside the outer drum and used for accommodating the washings. The start detection module 610 is configured to:

Optionally, the start detection module 610 is configured to: when a drying starting instruction is detected and a drum door of the drum washing machine is determined to be in a closed state, determining that a drum drying starting condition is currently met, wherein the drying starting instruction is generated according to a starting operation which is performed on an operation panel of the drum washing machine aiming at a drum drying program under the condition that a user does not have washing in a washing drum.

Optionally, a first temperature sensor is disposed at an air outlet of the air duct, so as to detect a temperature of hot air entering the washing drum from the air outlet. The apparatus 600 further comprises:

the first temperature acquisition module is used for acquiring the real-time temperature detected by the first temperature sensor;

and the first heater switch control module is used for controlling the heater to be switched off when the real-time temperature is higher than the upper limit value of a first preset temperature range, and controlling the heater to be switched on when the real-time temperature is lower than the lower limit value of the first preset temperature range.

Optionally, a first temperature sensor is disposed at an air outlet of the air duct to detect a temperature of hot air entering the washing drum from the air outlet, the washing drum includes an outer drum and a rotatable inner drum disposed inside the outer drum and used for accommodating washings, and a second temperature sensor is disposed in an interlayer between the outer drum and the inner drum to detect a temperature of humid air entering the condenser from the inner drum. The apparatus 600 further comprises:

the second temperature acquisition module is used for acquiring a first real-time temperature detected by the first temperature sensor and a second real-time temperature detected by the second temperature sensor;

the first control instruction obtaining module is used for obtaining a first control instruction according to the first real-time temperature; when the first real-time temperature is higher than a preset temperature protection threshold value, the first control instruction is a closing instruction;

the second control instruction obtaining module is used for obtaining a second control instruction according to the second real-time temperature; when the second real-time temperature is higher than the upper limit value of a second preset temperature range, the second control instruction is a closing instruction, and when the second real-time temperature is lower than the lower limit value of the second preset temperature range, the second control instruction is an opening instruction;

and the second heater switch control module is used for controlling the heater according to the first control instruction and the second control instruction, wherein when one of the first control instruction and the second control instruction is a closing instruction, the heater is closed.

Optionally, the apparatus 600 further comprises a drum drying end control module, configured to: starting timing after controlling the fan and the heater to start; and when the timing time reaches a preset timing time or an air drying end instruction is detected, controlling the fan and the heater to stop, wherein the air drying end instruction is generated according to the stop operation of a user on an operation panel of the drum washing machine for a drum air drying program.

Optionally, the washing drum comprises an outer drum and a rotatable inner drum arranged inside the outer drum and used for accommodating the washings. The drum dry start control module 620 is configured to: controlling the fan and the heater to start under the condition that the inner barrel does not rotate; or, the inner cylinder is driven to rotate continuously along the same direction, and the fan and the heater are controlled to be started under the condition that the inner cylinder rotates continuously.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

Based on the same inventive concept, the disclosed embodiment provides a drum washing machine, referring to the schematic diagram of fig. 1, the drum washing machine 100 includes:

a washing tub 110 for accommodating laundry;

the drum air drying system comprises a fan 121, a heater 122 and a condenser 123, wherein the fan 121 and the heater 122 are arranged in an air duct; wherein the blower 121 is configured to blow air toward the heater 122, thereby forming an air flow within the air duct, the heater 122 is configured to heat air blown from the blower 121 toward the washing tub 110, and the condenser 123 is configured to condense moisture in the air introduced from the washing tub 110;

and a control device (not shown) connected to the blower 121 and the heater 122, respectively.

The control device is used for executing the drum air drying method of the drum washing machine provided by the embodiment of the disclosure. Specifically, the control device is configured to: detecting whether a cylinder air drying starting condition is met currently, wherein the cylinder air drying starting condition comprises that no washing object exists in a washing cylinder; and under the condition that the air drying starting condition is met, controlling the fan and the heater to start.

After the blower 121 and the heater 122 are started, dry air is blown into the heater 122 by the blower 121, the dry air flows through the heater 122, and is heated by the heater 122 to become hot air, the hot air is introduced into the washing drum 110 through an air outlet of the air duct, the hot air absorbs moisture on the surface of the washing drum 110 to become humid air, the humid air is introduced into the condenser 123, the moisture in the humid air is condensed by the condenser 123 to form condensed water, the condensed water flows into the bottom of the washing drum along with cold water and is discharged out of the washing machine, the humid air with the moisture removed is changed into dry air, then is extracted by the blower 121, and is blown into the heater 122. Thus, the air in the washing machine is continuously circulated through the fan 121, the heater 122, the washing drum 110, and the condenser 123, thereby hot-drying the moisture on the surface of the washing drum 110.

In the embodiment of the present application, as shown in fig. 7, the washing drum 110 includes an outer drum 111 and a rotatable inner drum 112 disposed inside the outer drum 111 for accommodating the washing, wherein the inner drum 112 is sleeved on a driving shaft of a drum motor for driving the inner drum 112 to rotate through the driving shaft.

In an alternative embodiment, a weight sensor is provided at the junction of the inner drum 112 and the drive shaft for detecting the weight of the laundry in the inner drum 112. The control device is used for: after the preset washing program is finished, acquiring the real-time weight detected by the weight sensor, and when the real-time weight is lower than the preset weight and a drum door of the drum washing machine is in a closed state, determining that the drum air-drying starting condition is met currently; wherein the preset weight is determined based on the weight generated on the weight sensor when there is no laundry in the drum 112.

In an alternative embodiment, the control means is arranged to: after the preset washing program is finished, driving the inner cylinder to rotate for a preset time, and collecting an actual rotating speed curve of the inner cylinder in the rotating process; matching the actual rotating speed curve with a preset reference rotating speed curve, wherein the reference rotating speed curve represents the rotating speed curve of the inner barrel under the condition that no washing object exists in the inner barrel; and when the matching degree of the actual rotating speed curve and the reference rotating speed curve is higher than a preset matching threshold value and a drum door of the drum washing machine is in a closed state, determining that the drum air-drying starting condition is currently met.

In an alternative embodiment, an operation panel is disposed on the housing of the drum washing machine 100, and the operation panel is electrically connected to the control device, and the control device can respond to various operations of the user on the operation panel and execute corresponding programs. The user can select various washing programs such as a cleaning program, a rinsing program, a dewatering program, a drum air drying program and the like on the operation panel, when the user takes away the washings from the inner drum, the operation panel is actively started aiming at the drum air drying program, so that an air drying starting instruction is generated, and the control device is used for determining that the drum air drying starting condition is currently met when the air drying starting instruction is detected and the drum door of the drum washing machine is determined to be in a closed state, so that the fan and the heater are controlled to be started. When a user actively makes a stop operation on the operation panel for the drum seasoning program, a seasoning end instruction is generated, and the control device is used for controlling the fan and the heater to stop when detecting the seasoning end instruction.

Optionally, the control device is further configured to start timing after controlling the fan and the heater to start, and control the fan and the heater to stop when the timing time reaches a preset timing time.

In an alternative embodiment, as shown in fig. 7, a first temperature sensor 131 is disposed at the air outlet of the air duct, and during the process of blowing the hot air into the inner drum 112 from the air outlet of the air duct, the first temperature sensor 131 will detect the air temperature of the hot air entering the inner drum 112 from the air outlet. Specifically, the control device is configured to: the real-time temperature detected by the first temperature sensor is acquired, when the real-time temperature is higher than the upper limit value of the first preset temperature range, the heater is controlled to be closed, and when the real-time temperature is lower than the lower limit value of the first preset temperature range, the heater is controlled to be started.

In the above scheme, the real-time temperature measured by the first temperature sensor 131 is compared with the first preset temperature range, so that the temperature of the air in the inner cylinder 112 can be accurately controlled, the temperature in the cylinder is kept in a reasonable range higher than the external environment temperature of the washing machine, and the inner cylinder 112 is dried more quickly.

In an alternative embodiment, as shown in fig. 7, a first temperature sensor 131 is provided at the air outlet of the air duct, the first temperature sensor 131 is used for detecting the air temperature of the hot air entering the inner drum 112 from the air outlet, the hot air becomes damp and hot air after absorbing moisture in the inner drum 112, the damp and hot air enters the interlayer between the inner drum 112 and the outer drum 111 from the inner drum 112 and is introduced into the condenser 123 from the interlayer, a second temperature sensor 132 is provided in the interlayer between the inner drum 112 and the outer drum 111, wherein the second temperature sensor 132 can be provided at a position close to the condenser 123 in the interlayer, the second temperature sensor 132 is used for detecting the air temperature of the damp and hot air entering the condenser 123 from the inner drum 112, the air temperature measured by the second temperature sensor 132 is closer to the real temperature in the drum, therefore, the components are protected by the real-time temperature measured by the first temperature sensor 131, the heater 122 is controlled to be turned on and off using the real-time temperature measured by the second temperature sensor 132.

Specifically, the control device is configured to:

acquiring a first real-time temperature detected by a first temperature sensor and a second real-time temperature detected by a second temperature sensor;

obtaining a second control instruction according to the second real-time temperature; when the second real-time temperature is higher than the upper limit value of the second preset temperature range, the second control instruction is a closing instruction, and when the second real-time temperature is lower than the lower limit value of the second preset temperature range, the second control instruction is an opening instruction;

and controlling the heater according to the first control command and the second control command, wherein when one of the first control command and the second control command is a closing command, the heater is closed.

In the above solution, the first temperature sensor 131 and the second temperature sensor 132 can effectively prevent the abnormal rise of the temperature in the air duct from damaging the components and equipment, so as to protect the washing machine equipment, and can accurately control the temperature of the air in the inner drum 112 in a reasonable range higher than the external environment temperature of the washing machine, so that the inner drum 112 is dried more quickly.

In an alternative embodiment, the control means is arranged to: controlling the starting of the fan and the heater under the condition that the inner cylinder does not rotate; or, the inner barrel is driven to rotate continuously along the same direction, and the fan and the heater are controlled to be started under the condition that the inner barrel rotates continuously.

Based on the same inventive concept, the disclosed embodiments also provide a computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the steps of the drum drying method of the drum washing machine provided by the present disclosure.

In another exemplary embodiment, a computer program product is also provided, which comprises a computer program executable by a programmable device, the computer program having code portions for performing the above-mentioned drum drying method of a drum washing machine when executed by the programmable device.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A drum drying method of a drum washing machine, characterized in that the drum washing machine comprises a washing drum for accommodating laundry and a drum drying system, the drum drying system comprises a fan, a heater and a condenser, the fan and the heater are installed in an air duct, the method comprises:

2. The method as claimed in claim 1, wherein the washing drum comprises an outer drum and a rotatable inner drum arranged inside the outer drum for accommodating the washings, the inner drum is sleeved on a driving shaft of a drum motor, and a weight sensor is arranged at the joint of the inner drum and the driving shaft for detecting the weight of the washings in the inner drum; whether the detection meets the cylinder air-drying starting condition currently or not comprises the following steps:

3. The method of claim 1, wherein the washing drum comprises an outer drum and a rotatable inner drum disposed inside the outer drum for containing the laundry, and the detecting whether the drum drying start condition is currently satisfied comprises:

4. The method of claim 1, wherein the detecting whether a barrel air-dry start condition is currently satisfied comprises:

5. The method according to claim 1, wherein a first temperature sensor is provided at an air outlet of the air duct for detecting a temperature of the hot air entering the washing drum from the air outlet; the method further comprises the following steps:

acquiring real-time temperature detected by the first temperature sensor;

6. The method as claimed in claim 1, wherein a first temperature sensor is provided at an air outlet of the wind tunnel for detecting a temperature of the hot air entering the washing drum from the air outlet, the washing drum comprises an outer drum and a rotatable inner drum provided inside the outer drum for containing the laundry, and a second temperature sensor is provided in an interlayer of the outer drum and the inner drum for detecting a temperature of the humid air entering the condenser from the inner drum; the method further comprises the following steps:

7. The method of claim 1, further comprising:

starting timing after controlling the fan and the heater to start;

8. The method of claim 1, wherein the washing drum comprises an outer tub and a rotatable inner tub disposed inside the outer tub for containing the laundry, and the controlling the blower and the heater to be activated comprises:

9. A drum air drying device of a drum washing machine is characterized in that the drum washing machine comprises a washing drum for accommodating washings and a drum air drying system, wherein the drum air drying system comprises a fan, a heater and a condenser, and the fan and the heater are arranged in an air duct; the device comprises:

10. A drum washing machine characterized by comprising:

a washing drum for accommodating washings;

11. A computer-readable storage medium, on which computer program instructions are stored, which program instructions, when executed by a processor, carry out the steps of the method according to any one of claims 1 to 8.