CN107724023B - Drying method for washing and drying integrated machine and washing and drying integrated machine - Google Patents
Drying method for washing and drying integrated machine and washing and drying integrated machine Download PDFInfo
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- CN107724023B CN107724023B CN201610663802.XA CN201610663802A CN107724023B CN 107724023 B CN107724023 B CN 107724023B CN 201610663802 A CN201610663802 A CN 201610663802A CN 107724023 B CN107724023 B CN 107724023B
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- 238000001035 drying Methods 0.000 title claims abstract description 309
- 238000005406 washing Methods 0.000 title claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 78
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 16
- 230000037303 wrinkles Effects 0.000 claims description 13
- 230000037331 wrinkle reduction Effects 0.000 claims description 9
- 230000001133 acceleration Effects 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 7
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000013459 approach Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F58/00—Domestic laundry dryers
- D06F58/30—Drying processes
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Abstract
The invention relates to the technical field of clothes drying, in particular to a drying method for a washing and drying integrated machine and the washing and drying integrated machine. The drying method comprises the following steps: and the constant-speed heating step is finished after the second preset time is executed in the constant-speed heating step, and/or after the temperature in the inner cylinder reaches a stable state, and/or after the difference value between the temperature in the inner cylinder and the temperature of water in the outer cylinder reaches a stable state. Therefore, the invention designs a time condition and two temperature conditions to respectively or jointly judge whether to finish the constant-speed heating step, and the finishing time is set more reasonably, so that the whole drying process is also optimized. The washing and drying integrated machine adopts the drying method, and the whole drying process of the washing and drying integrated machine is optimized.
Description
Technical Field
The invention relates to the technical field of clothes drying, in particular to a drying method for a washing and drying integrated machine and the washing and drying integrated machine.
Background
The washing and drying integrated machine with larger capacity can meet the requirements of a user on drying larger drying objects (such as clothes, bed sheets and the like) and more drying objects, and is popular with the user. In addition, with continuous upgrading and optimization of large-capacity washing and drying integrated machines in the industry, the large-capacity washing and drying integrated machine becomes the development direction of the industry. Among them, meeting the requirement of the user for the drying degree of the drying object becomes the research direction and trend of products in the industry at present.
The drying principle of the washing and drying integrated machine at present is as follows: the air is heated by a heater (such as a group of heating wires), the heated air is blown into the inner cylinder by the fan to form hot air, the drying object in the inner cylinder is heated to evaporate water in the drying object into high-temperature high-humidity steam, the high-temperature high-humidity steam is sucked into the condenser by the negative pressure formed by the axial flow fan, the high-temperature high-humidity steam is condensed in the condenser to form condensed water, the condensed water flows down along the outer wall of the exchanger, and the cooled air is continuously circulated. In the existing drying process, the inner cylinder is set to rotate at a constant speed in a positive and negative rotation mode at a fixed rotation speed and a fixed rotation-stop ratio, so that the drying object is dried uniformly.
The existing drying method comprises a low-speed shaking step and a constant-speed heating step, and how to make the finishing time of the constant-speed heating step more reasonable to optimize the whole drying process is a problem that needs to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims at one aspect that: the drying method for the washing and drying integrated machine is provided, and the finishing time of the uniform heating step in the drying method is set more reasonably so as to optimize the whole drying process.
Another aspect of the present invention is directed to: the washing and drying integrated machine is provided, the finishing time of the uniform heating step of the washing and drying integrated machine is more reasonable, and the whole drying process is more optimized.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a drying method for a washing and drying integrated machine, which comprises the following steps: a low-speed shaking step, wherein the inner cylinder rotates at a first rotating speed capable of shaking and scattering the drying object; a uniform heating step, rotating the inner cylinder at a second rotating speed which is greater than the first rotating speed and starting to convey hot air into the inner cylinder; and finishing the constant-speed heating step after the constant-speed heating step is executed for a second preset time, and/or after the temperature in the inner cylinder reaches a stable state, and/or after the difference value between the temperature in the inner cylinder and the temperature of water in the outer cylinder reaches a stable state.
According to the present invention, the condition for ending the uniform velocity heating step is any one of the following conditions a to f: a, when the temperature in the inner cylinder reaches a stable state; the condition b is that when the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state; condition c, when the temperature in the inner cylinder reaches a stable state and when the difference value between the temperature in the inner cylinder and the temperature of water in the outer cylinder reaches the stable state; the condition d is that after the constant-speed heating step is executed for a second preset time and the temperature in the inner cylinder reaches a stable state; the condition e is that after the constant-speed heating step is executed for a second preset time and the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state; and a condition f, after the uniform heating step is executed for the second preset time, after the temperature in the inner cylinder reaches a stable state and after the difference between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches the stable state.
According to the invention, the method for determining the second preset time comprises the following steps: and calculating the time required by the moisture content of the drying object to reach 10% -30% according to the total weight of the drying object and the highest rotating speed which can be reached during the dehydration of the washing program, wherein the time is used as second preset time.
According to the invention, in the low-speed dithering step: the first rotating speed is in the range of 20 rpm-30 rpm, the inner cylinder rotates forward and backward alternately, and the rotating-stopping ratio is 120s:5 s; in the uniform heating step: the second rotation speed is in the range of 30-60 rpm, the inner cylinder rotates forwards and backwards alternately, and the rotation-stop ratio is 50s:5 s.
According to the invention, after the uniform heating step, the method further comprises the following steps: an accelerated drying step, wherein the inner barrel rotates alternately at a second rotating speed and a third rotating speed which can enable the drying object to form a channel in the middle of the inner barrel under the action of centrifugal force, wherein the third rotating speed is greater than the second rotating speed; and a speed and wrinkle reducing step, wherein the inner cylinder rotates at a fourth rotating speed capable of reducing wrinkles of the drying object, and the fourth rotating speed is less than the third rotating speed.
According to the invention, it also comprises: a first comparison step before the accelerated drying step, wherein the first comparison step is as follows: comparing the total weight of the drying object with a first preset value; when the total weight of the drying object is smaller than a first preset value, directly entering a speed reduction and wrinkle reduction step after the uniform heating step is finished; and when the total weight of the drying object is more than or equal to a first preset value, entering an accelerated drying step after the uniform heating step is finished.
According to the invention, after the low-speed shaking step is executed for the first preset time, the low-speed shaking step is ended and the next step is started; and when the accelerated drying step is executed for a third preset time, and/or when the temperature in the inner cylinder reaches a stable state, and/or when the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state, ending the accelerated drying step and entering the next step.
According to the invention, the first preset time is determined by the following four ways alone or in combination: firstly, the first preset time is a preset fixed time; secondly, the first preset time is determined according to the total weight of the drying object; thirdly, the first preset time is determined according to the actual highest rotating speed of the inner cylinder; fourthly, the first preset time is determined according to the material of the drying object.
According to the invention, in the step of accelerated drying: the third rotating speed is in the range of 90-120 rpm, the inner cylinder rotates forward and backward alternately, and the time ratio of the rotation of the inner cylinder at the third rotating speed to the rotation of the inner cylinder at the second rotating speed is 5-10 min: 5-10 min; in the speed-reducing and wrinkle-reducing step: the fourth rotating speed is in the range of 20 rpm-30 rpm, the inner cylinder rotates forwards and backwards alternately, and the rotating-stopping ratio is 120s:5 s.
The invention further provides a washing and drying integrated machine, and any one of the drying methods for the washing and drying integrated machine is adopted.
The technical scheme of the invention has the following advantages:
the drying method for the washing and drying integrated machine comprises the following steps: a low-speed shaking step, wherein the inner cylinder rotates at a first rotating speed capable of shaking and scattering the drying object; a uniform heating step, rotating the inner cylinder at a second rotating speed which is greater than the first rotating speed and starting to convey hot air into the inner cylinder; and finishing the constant-speed heating step after the constant-speed heating step is executed for a second preset time, and/or after the temperature in the inner cylinder reaches a stable state, and/or after the difference value between the temperature in the inner cylinder and the temperature of water in the outer cylinder reaches a stable state. Therefore, the invention designs a time condition and two temperature conditions to respectively or jointly judge whether to finish the constant-speed heating step, and the finishing time is set more reasonably, so that the whole drying process is also optimized.
The washing and drying integrated machine adopts the drying method for the washing and drying integrated machine. The washing and drying integrated machine adopts a time condition and two temperature conditions to respectively or jointly judge whether to finish the step of uniform heating, and the finishing time is set more reasonably, so that the whole drying process is also optimized.
Drawings
FIG. 1 is a schematic flow chart of a drying method for a washing and drying integrated machine according to an embodiment of the present invention;
fig. 2 and 3 are a schematic flow chart and a schematic timing chart when the condition for ending the constant speed heating step in the drying method in fig. 1 is a time condition;
fig. 4 and 5 are a schematic flow chart and a schematic timing chart when the condition for ending the constant speed heating step in the drying method in fig. 1 is a temperature condition;
FIG. 6 is a schematic diagram of a corresponding structure when the temperature conditions of FIG. 4 are employed;
fig. 7 is a schematic flow chart of the drying method in fig. 1 when the condition for ending the constant speed heating step and entering the next step is another temperature condition;
FIG. 8 is a schematic diagram of a prior art drying method for a washer dryer;
fig. 9 is a schematic diagram of a method for determining a first preset time for ending the low-speed shaking step in the drying method of fig. 1;
fig. 10 is a timing diagram illustrating a weight sensing method of the drying object in fig. 9;
fig. 11 is a timing diagram illustrating a drying object material method in fig. 9;
FIG. 12 is a timing diagram of the fixed time method of FIG. 9;
FIG. 13 is a timing diagram of the speed feedback method of FIG. 9;
fig. 14 and 15 are a schematic flowchart and a schematic timing chart in the case where the condition for ending the acceleration drying step and entering the speed-reduction wrinkle-reduction step in the drying method in fig. 1 is a time condition;
fig. 16 and 17 are a schematic flowchart and a schematic timing chart in the case where the condition for ending the acceleration drying step and proceeding to the deceleration wrinkle reducing step in the drying method in fig. 1 is a temperature condition;
fig. 18 is a schematic flow chart of the case where the condition for ending the acceleration drying step and proceeding to the speed-reduction wrinkle-reduction step in the drying method of fig. 1 is another temperature condition.
In the figure:
t1first preset time; t is t2The second preset time; t is t3The third preset time; 1: a first sensor; 2: a second sensor; 3: an electric motor.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
Referring to fig. 1, in the present embodiment, a drying method for a washing and drying all-in-one machine is provided. The drying method is carried out after the washing process is finished, and comprises the following steps:
and a low-speed shaking step, wherein the inner cylinder rotates at a first rotating speed capable of shaking the drying object so as to avoid the condition that the drying object cannot be dried in the subsequent step because the drying object is not dropped off when being attached to the wall of the inner cylinder. Particularly, the drying object at the highest position can only be peeled off the inner cylinder wall due to self gravity when the drying object is completely static, so that the low-speed rotation is adopted to be beneficial to peeling off the inner cylinder wall by all the drying objects depending on the self gravity, and the inner cylinder rotates at a lower first rotating speed at the initial stage of drying so that the drying object is separated from the inner cylinder wall through the self gravity. In this embodiment, the first rotational speed is in the range of 20rpm to 30rpm, the rotation-to-stop ratio of the inner tube is 120s:5s and the inner tube is alternately rotated forward and reverse (i.e., forward rotation 120 s-stop 5 s-reverse rotation 120 s-stop 5 s-forward rotation 120s … …). At this stage, the heater is not turned on, so that misjudgment of automatic drying termination caused by non-falling of the drying object is avoided.
And a uniform heating step, namely, the rotating speed of the inner barrel is increased, the inner barrel rotates at a second rotating speed which is higher than the first rotating speed, and the heater and the fan are started to convey hot air into the inner barrel, so that the drying object is wet, the drying object rotates intensively, is heated uniformly, and is high in drying speed. Wherein, the rotating speed of the inner cylinder is increased to ensure that the drying object can contact hot air to the maximum extent. But the rotating speed cannot be increased too much to avoid the phenomenon that the gap between the drying objects is too small and the hot air cannot uniformly pass through. In this embodiment, the second speed is in the range of 30rpm to 60rpm, the inner barrel is alternately rotated forward and reverse with a spin-to-stop ratio of 50s:5s (i.e., forward rotation 50 s-stall 5 s-reverse rotation 50 s-stall 5 s-forward rotation 50s … …).
An accelerated drying step, wherein the inner cylinder rotates alternately at a second rotating speed and a third rotating speed which enables the drying object to form a channel in the middle of the inner cylinder under the action of centrifugal force, wherein the third rotating speed is higher than the second rotating speed, when the inner cylinder rotates at the third rotating speed, the drying object moves towards the inner cylinder wall due to the increase of the centrifugal force, a channel which extends from front to back is formed in the middle of the inner cylinder around the rotating axis of the inner cylinder, and the channel can guide part of hot air to the drying object in the middle of the inner cylinder and the drying object at the rear part of the inner cylinder, so that the drying is mainly performed on the part of the drying object; when the inner cylinder rotates at the second rotating speed, the drying object moves and loosens along the direction far away from the inner cylinder wall due to the fact that centrifugal force becomes small, and therefore heating of the drying object which is close to the inner cylinder wall originally is also guaranteed. Specifically, in this embodiment, after entering the step of accelerated drying, the inner cylinder is first rotated at a third rotation speed, the third rotation speed is in a range of 90rpm to 120rpm, the drying is continued for 5 to 10min at this rotation speed, then the rotation speed of the inner cylinder is restored to the original second rotation speed, the drying is continued for 5 to 10min at this rotation speed, then the rotation speed of the inner cylinder is changed to the third rotation speed again for 5 to 10min, and simultaneously, the inner cylinder is rotated in a forward and reverse direction. Namely, the forward direction is operated at the third rotating speed for 5-10 min, the forward direction is operated at the second rotating speed for 5-10 min, the reverse direction is operated at the third rotating speed for 5-10 min, the reverse direction is operated at the second rotating speed for 5-10 min, and the forward direction is operated at the third rotating speed for 5-10 min … ….
And a speed and wrinkle reducing step, wherein the inner cylinder rotates at a fourth rotating speed which can reduce wrinkles of the drying object, and the fourth rotating speed is less than the third rotating speed. At this stage, the moisture content of the drying object is relatively low, the fourth rotation speed is in the range of 20 rpm-30 rpm, the inner drum is alternately rotated forward and backward, and the rotation-stop ratio is 120s:5s (i.e., forward rotation 120 s-stop 5 s-reverse rotation 120 s-stop 5 s-forward rotation 120s … …).
And a speed-increasing cooling step, wherein the surface temperature of the dried object is higher after the drying process, so that the temperature needs to be reduced. In this step, the inner drum rotates at a fifth rotation speed greater than the fourth rotation speed, and the operation of the heater is stopped to stop the supply of the hot air and the supply of the cold air into the inner drum to lower the temperature of the drying object. And the fifth rotating speed is within the range of 30-60 rpm, so that the drying object rotates densely at a constant speed, and the temperature is reduced uniformly. Preferably, the fifth rotational speed is equal to the second rotational speed. And the inner cylinder rotates forward and backward alternately with a rotation-stop ratio of 50s:5s (i.e., normal rotation 50 s-stall 5 s-reverse rotation 50 s-stall 5 s-normal rotation 50s … …).
It is to be understood that, in this embodiment, the constant velocity heating step is followed by other steps, and thus the condition for ending the constant velocity heating step is also the condition for ending the constant velocity heating step and entering the next step.
Specifically, referring to fig. 2 and 3, the time condition is: when the uniform heating step is performed for a second preset time (denoted by t in the figure)2Shown), the constant velocity heating step is ended and the next step is entered. After the moisture content of the drying object is gradually reduced to 10% -30%, under the condition that the current drying object distribution is kept, water on the drying object is difficult to analyze, and mainly because the drying objects in the middle and the rear of the inner cylinder are limited by space, relatively less hot air can be contacted. Therefore, if it is necessary to further improve the drying efficiency, it is necessary to adjust the distribution of the drying object, i.e., to enter the acceleration drying step. After the total weight of the drying object is sensed, the total running time of the whole drying program can be calculated by combining the highest rotating speed which can be reached when the washing program is dehydrated. The moisture content of the drying object can be indirectly calculated to reach 10% -30% according to the running time of the program% time needed, which is the second predetermined time.
Referring to fig. 2 and 3, the determining of the second preset time may be performed at any time before the uniform heating step, and taking the flow shown in fig. 2 as an example, the total weight of the drying object is sensed before the washing process starts, an initial second preset time is set according to the total weight of the drying object, and then the washing process is entered, and the initial second preset time is modified according to the actual highest rotation speed in the washing process to obtain the second preset time. And then ending the washing program, entering a low-speed shaking step, entering a constant-speed heating step after the low-speed shaking step is ended, intermittently or continuously judging whether a second preset time is reached in the execution process of the constant-speed heating step, ending the constant-speed heating step and entering the next step (such as an accelerated drying step) after the constant-speed heating step is executed for the second preset time.
Specifically, referring to fig. 4 to 6, in the course of performing the constant velocity heating step, it is intermittently or continuously determined whether the above temperature condition is reached. The temperature conditions may be: and when the temperature in the inner cylinder reaches a stable state, ending the constant-speed heating step and entering the next step. Specifically, in the uniform heating step, the first sensor 1 (see fig. 5, and also the motor 13 shown in fig. 5) is used to measure the temperature of the inner cylinder, and the temperature in the inner cylinder gradually rises first and then becomes stable to reach a stable state. Wherein, the temperature value which tends to be stable is a variable amount because of different environmental temperatures, different relative humidities, different temperatures of the condensing medium, and the like. When the temperature in the inner cylinder reaches the stable temperature, the heat in the washing and drying integrated machine/dryer reaches the dynamic balance indirectly, which also indicates that the washing and drying integrated machine/dryer continues to rotate at the current rotating speed and has no further drying effect. Therefore, the next step needs to be entered.
Specifically, referring to fig. 7, the temperature conditions may also be: and when the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state, ending the constant-speed heating step and entering the next step. Specifically, in the constant-speed heating step, the second sensor 2 is used for measuring the temperature of the water in the outer barrel, the temperature of the water in the outer barrel can also reach a stable value, but the second sensor 2 is far away from the position where hot air is fed, the response is relatively slow, and the constant-speed heating step can be used as an auxiliary control condition. After the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state, the fact that the heat in the washing and drying integrated machine/clothes dryer reaches dynamic balance is indirectly shown, and the effect that the washing and drying integrated machine/clothes dryer does not further dry when the washing and drying integrated machine/clothes dryer continues to rotate at the current rotating speed is also shown. Therefore, the next step needs to be entered.
The conditions for ending the uniform heating step and proceeding to the next step may be a combination of the above two temperature conditions or a combination of the above time condition and one or two temperature conditions, i.e., the above conditions must be simultaneously achieved. In summary, the constant heating step is finished after the constant heating step is performed for a second preset time, and/or after the temperature in the inner cylinder reaches a stable state, and/or after the difference between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state. For example, after the constant velocity heating step is performed for a second preset time and the temperature in the inner cylinder reaches a stable state, the constant velocity heating step is ended and the next step is performed.
Therefore, the embodiment designs a time condition and two temperature conditions to respectively or jointly judge whether to finish the constant-speed heating step, and the finishing time is set more reasonably, so that the whole drying process is optimized.
Preferably, the condition for ending the uniform heating step is that either one of the two temperature conditions is satisfied, or both the two temperature conditions are satisfied, or at least one of the time condition and the two temperature conditions is satisfied, or both the time condition and the two temperature conditions are satisfied. Specifically, the condition for ending the uniform velocity heating step is any one of the following conditions a to f:
a, when the temperature in the inner cylinder reaches a stable state;
the condition b is that when the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state;
condition c, when the temperature in the inner cylinder reaches a stable state and when the difference value between the temperature in the inner cylinder and the temperature of water in the outer cylinder reaches the stable state;
the condition d is that after the constant-speed heating step is executed for a second preset time and the temperature in the inner cylinder reaches a stable state;
the condition e is that after the constant-speed heating step is executed for a second preset time and the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state;
and f, after the constant-speed heating step is executed for a second preset time, when the temperature in the inner cylinder reaches a stable state and when the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches the stable state.
In addition, referring to fig. 8, the drying principle of the present washing and drying integrated machine is as follows: the air is heated by a heater (such as a set of heating wires), the heated air (namely hot air) is blown into the inner cylinder by the fan to form hot air, the drying object in the inner cylinder is heated to evaporate moisture in the drying object into high-temperature and high-humidity steam, the high-temperature and high-humidity steam is sucked into the condenser by the negative pressure formed by the axial flow fan, the high-temperature and high-humidity steam is condensed in the condenser to form condensed water, the condensed water flows down along the outer wall of the exchanger, and the cooled air is continuously circulated. In the existing drying process, the inner cylinder is set to rotate at a constant speed in a positive and negative rotation mode at a fixed rotation speed and a fixed rotation-stop ratio, so that the drying object is dried uniformly. However, as the capacity of the drying object increases, especially when the drying capacity exceeds half of the washing capacity, the drying uniformity of the drying object at different positions in the inner drum is poor, wherein the drying degree of the drying object in the middle of the inner drum and at the rear of the inner drum (a part far away from the hot air blowing end) is inferior to that of the drying object at the front of the inner drum and the drying object near the inner drum wall, thereby causing a problem of poor drying uniformity of the whole drying object.
In this embodiment, the above-mentioned drying method can also solve the problem of poor drying uniformity of the whole drying object caused by poor drying degree of the drying object in the middle and rear of the inner cylinder. Specifically, the drying method of this embodiment defines a set of complete drying processes from the perspective of the rotation speed, and changes the rotation speed and the rotation-stop ratio of the inner drum (realized by controlling the rotation speed and the rotation-stop ratio of the inner drum motor), so as to improve the drying uniformity of the drying object, aiming at the disadvantage of uneven drying in the existing drying method. On the basis of ensuring that the drying object is in a shaking state in the low-speed shaking step, different rotating speeds are adopted in the constant-speed heating step and the accelerated drying step, so that hot air is in better contact with clothes in the middle and the rear part of the inner drum, the integral drying uniformity of the drying object is improved, and the drying performance is improved; and after the main drying process is finished, the speed reduction and wrinkle reduction steps are carried out, so that the flatness of the drying object can be improved.
Further, under the condition that the volume of the inner barrel is fixed, the drying object with small weight can be kept in a fluffy state all the time at the second rotating speed, and the drying objects in the middle and the rear part of the inner barrel can be uniformly heated relatively well, so that the time for carrying out the accelerated drying step can be relatively short, and the step is not even required. In this embodiment, in order to improve the drying efficiency, reduce the drying time and reduce power consumption on the basis of ensuring the drying effect, before entering the step of accelerating the drying, for example, a first comparing step is performed after the step of uniform heating is finished, and the total weight of the drying object is compared with a first preset value. When the total weight of the drying object is smaller than a first preset value, directly entering a speed reduction and wrinkle reduction step after the uniform heating step is finished; and when the total weight of the drying object is more than or equal to a first preset value, entering an accelerated drying step after the uniform heating step is finished. That is, the accelerated drying step is selectively performed based on the total weight of the drying object.
Furthermore, under the condition that the volume of the inner drum is fixed, the drying object with small weight can be always kept in a fluffy state at the second rotating speed, and even the speed reduction and wrinkle reduction steps are not needed. In this embodiment, in order to improve the drying efficiency, reduce the drying time and reduce power consumption on the basis of ensuring the flatness of the drying object, the second comparison step is performed before entering the speed-reducing and wrinkle-reducing step, and the total weight of the drying object is compared with the second preset value. When the total weight of the drying object is larger than a second preset value, a speed reducing and wrinkle reducing step must be performed before the speed increasing and cooling step to ensure the flatness of the drying object; and when the total weight of the drying object is smaller than a second preset value, the speed reduction and wrinkle reduction step is cancelled, namely, the speed increasing cooling step is directly carried out from the uniform speed heating step when the speed increasing drying step is cancelled or the speed increasing drying step is cancelled.
Further, the condition for ending the low speed shaking step and proceeding to the next step (uniform heating step) is a time condition in the present embodiment, that is, when the low speed shaking step is performed for a first preset time (t in the figure)1Shown), the low speed shaking step is ended and the constant speed heating step is entered. Referring to fig. 9, the first preset time may be determined in four ways. In addition, the step of determining the first preset time may be performed at any time before the low speed shaking step, and in fig. 9, taking the determination of the first preset time before the washing procedure is started as an example, the low speed shaking step is performed after the washing is finished, and during the execution of the low speed shaking step, whether the first preset time is reached is determined at intervals or continuously.
Specifically, referring to fig. 10, the drying object having a small weight grade is more easily attached to the inner cylindrical wall due to a large centrifugal force and a small mass at a high rotation speed, and is difficult to fall off, requiring a longer shaking time; under the condition of high rotating speed of drying objects with large weight grade, because the quantity of the drying objects is large, the drying objects have extrusion effect and are easy to stick on the inner cylinder wall, and longer shaking time is needed; the probability that drying objects with other weight grades are attached to the inner cylinder wall is relatively small, and the time for separating the drying objects from the inner cylinder wall is relatively short. Accordingly, the first preset time may be determined according to the total weight of the drying object. Wherein, at any time before the low-speed shaking step, the total weight of the drying object is sensed, and then a first preset time is determined according to the sensed weight. This manner may be referred to as a drying object weight sensing method, and the first preset time determined by this manner is advantageous to shorten the total time for the drying process to be operated. The first preset time is obtained by searching a table after the total weight of the drying object is collected; the total weight of the drying object can also form a functional relation with the first preset time, and the first preset time is obtained through calculation after the total weight of the drying object is collected. Of course, the present invention is not limited thereto, and in other embodiments, the total weight of the drying object and the first preset time may be associated in other manners.
Specifically, referring to fig. 11, drying objects made of different materials are attached to the inner cylindrical wall at different times, and the drying objects made of cotton are easily attached to the inner cylindrical wall after rotating at a high speed; the drying object of chemical fiber can be automatically separated from the inner cylinder even without shaking after rotating at high speed. Therefore, the first preset time may be determined according to the material of the drying object. For example, at any time before the low-speed shaking step, the material of the drying object is obtained, wherein the material of the drying object may be sensed (through RFID technology) or selected by the user himself, and then the first preset time is determined according to all the materials in the drying object. This method may be called a drying object material method. The material of the drying object and the first preset time can be preset to be in one-to-one correspondence, that is, the first preset time can be obtained by looking up a table after the material of the drying object is collected; the material of the drying object can form a functional relation with the first preset time, and the first preset time is obtained through calculation after the material of the drying object is collected. Of course, the present invention is not limited thereto, and in other embodiments, the material of the drying object and the first preset time may be associated in other manners.
Specifically, referring to fig. 12, in order to effectively ensure shaking-out of the drying objects, a first preset time may be determined according to the worst case, so that the drying objects of all levels adopt the same time value, which is fixed. This approach may be referred to as a fixed time approach.
Specifically, referring to fig. 13, different rotation speeds and different centrifugal forces may vary the time during which the drying object is shaken off. Under the condition that the actual maximum rotating speed of the inner cylinder can be detected, different first preset time is determined according to different maximum rotating speeds reached by the inner cylinder. This approach may be referred to as a rotational speed feedback method. The actual maximum rotating speed of the inner cylinder and the first preset time can be preset to be in one-to-one correspondence relationship, namely, the first preset time can be obtained by looking up a table after the actual maximum rotating speed of the inner cylinder is collected; the actual maximum rotating speed of the inner cylinder can form a functional relation with the first preset time, and the first preset time is obtained through calculation after the actual maximum rotating speed of the inner cylinder is collected. Of course, the present invention is not limited to this, and in other embodiments, the actual maximum rotation speed of the inner cylinder may be related to the first preset time in other manners.
In summary, the first preset time can be determined by the above four methods alone or in combination of a plurality of the four methods. The case of multiple combinations is any two or three of the above four ways, or the above four ways, wherein different ways are in different priorities. For example, the first preset time is preferentially determined by a drying object weight sensing method or a drying object material method, and when the first preset time cannot be determined, the first preset time is determined by a fixed time method. From this, through above-mentioned four kinds of modes, confirm according to operating condition and tremble scattered time, improved drying efficiency.
Particularly, according to any one of a drying object weight sensing method, a rotating speed feedback method and a drying object material method or a combination of any more of the three methods and a fixed time method, compared with the condition that the shaking-up time is a fixed value, the method is more targeted, and the drying efficiency can be obviously improved.
Further, the condition for ending the speed-accelerating drying step and proceeding to the speed-reducing wrinkle-reducing step is a time condition or a temperature condition in the present embodiment.
Specifically, referring to fig. 14 and 15, in the course of performing the acceleration drying step, it is intermittently or continuously judged whether the above-described time condition is reached. Specifically, the time conditions are as follows: when the accelerated drying step is performed for a third preset time (denoted by t in the figure)3Shown), the accelerated drying step is finished and the next step (the speed reducing and wrinkle reducing step) is carried out. Wherein, when the moisture content of the drying object is gradually reduced to less than 10%, the moisture content of the drying object is relatively low and the time from the drying is relatively short. If the drying object continues to operate at a relatively high rotation speed, wrinkles of the drying object are more and more increased and flatness is deteriorated in a high temperature state due to a centrifugal force and a pressing force between the drying objects. Therefore, in this case, the rotation speed of the inner drum needs to be reduced to ensure the drying coupleLike good flatness. After the total weight of the drying object is sensed, the total operation time of the whole drying program can be calculated by combining the highest rotating speed which can be reached when the washing program is dehydrated. The time required for the moisture content of the laundry to be less than 10% may be indirectly calculated from the total time of the operation of the program, and this time is taken as the third preset time.
Referring to fig. 14 and 15, the determining of the third preset time may be performed at any time before the acceleration drying step, and taking the flow shown in fig. 14 as an example, the total weight of the drying object is sensed before the washing process is started, an initial third preset time is set according to the total weight of the drying object, and then the washing process is entered, and the initial third preset time is corrected according to the actual maximum rotation speed in the washing process to obtain the third preset time. And then ending the washing program, entering a low-speed shaking step, entering a constant-speed heating step after the low-speed shaking step is ended, entering an accelerated drying step after the constant-speed heating step is ended, judging whether the third preset time is reached or not at intervals or continuously in the execution process of the accelerated drying step, ending the accelerated drying step and entering a speed-reducing and wrinkle-reducing step after the third preset time is executed in the accelerated drying step.
Specifically, referring to fig. 16 to 17, in the course of performing the acceleration drying step, it is intermittently or continuously judged whether the above temperature condition is reached. The temperature conditions may be: and when the temperature in the inner cylinder reaches a stable state, ending the step of accelerating drying and entering the step of reducing the speed and the wrinkles. Specifically, in the step of accelerated drying, the temperature in the inner cylinder gradually rises again after reaching equilibrium in the step of uniform heating, and then becomes stable again to reach a stable state. Wherein, the temperature value which tends to be stable is a variable amount because of different environmental temperatures, different relative humidities, different temperatures of the condensing medium, and the like. When the temperature in the inner cylinder reaches the stable temperature, the heat in the washing and drying integrated machine/dryer reaches the dynamic balance indirectly, which also indicates that the washing and drying integrated machine/dryer continues to rotate at the current rotating speed and has no further drying effect. Therefore, the next step needs to be entered.
Specifically, referring to fig. 18, the temperature conditions may be: and when the difference between the temperature in the inner cylinder and the water temperature in the outer cylinder reaches a stable state, ending the step of accelerating drying and entering the step of reducing the speed and the wrinkles. Specifically, in the step of accelerated drying, the water temperature of the outer drum also reaches a stable value again, but the sensor is far away from the position where hot air is fed, and the response is relatively slow, so that the sensor can be used as an auxiliary control condition. After the difference value between the temperature in the inner cylinder and the water temperature in the outer cylinder reaches a stable state, the fact that the heat inside the washing and drying integrated machine/clothes dryer reaches dynamic balance is indirectly shown, and the effect that the washing and drying integrated machine/clothes dryer does not further dry when the washing and drying integrated machine/clothes dryer continues to rotate at the current rotating speed is also shown. Therefore, the next step needs to be entered.
The condition for ending the accelerated drying step and entering the speed-reducing and wrinkle-reducing step can also be a combination of the two temperature conditions or a combination of the time condition and one or two temperature conditions, namely, the conditions are required to be achieved simultaneously. For example, after the accelerated drying step is executed for a third preset time and the temperature in the inner drum reaches a stable state, the accelerated drying step is ended and the speed reduction and wrinkle reduction step is performed.
Further, the condition for ending the speed-reducing and wrinkle-reducing step and entering the speed-increasing cooling step is also preferably a time condition, that is, after the speed-reducing and wrinkle-reducing step is performed for a fixed time, the speed-reducing and wrinkle-reducing step is ended and the speed-increasing cooling step is entered. Of course, the invention is not so limited and other conditions may be used in other embodiments to determine when to end the de-speeding and de-wrinkling step.
Example two
In the embodiment, a washing and drying all-in-one machine is provided, and the washing and drying all-in-one machine adopts the drying method for the washing and drying all-in-one machine. The washing and drying integrated machine adopts a time condition and two temperature conditions to respectively or jointly judge whether to finish the step of uniform heating, and the finishing time is set more reasonably, so that the whole drying process is also optimized.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. A drying method for a washing and drying integrated machine is characterized by comprising the following steps:
a low-speed shaking step, wherein the inner cylinder rotates at a first rotating speed capable of shaking and scattering the drying object;
a uniform heating step, wherein the inner cylinder rotates at a second rotating speed which is higher than the first rotating speed and starts to convey hot air into the inner cylinder;
an accelerated drying step, wherein the inner cylinder rotates at the second rotating speed and a third rotating speed alternately, wherein the third rotating speed is greater than the second rotating speed;
when the inner cylinder rotates at a third rotating speed, the drying object can move towards the inner cylinder wall due to the increase of centrifugal force, so that a channel extending from front to back is formed in the middle of the inner cylinder around the rotating axis of the inner cylinder, and the channel can guide part of hot air to the middle position of the inner cylinder and the rear part of the inner cylinder; when the inner cylinder rotates at a second rotating speed, the drying object can move and loosen in the direction far away from the inner cylinder wall due to the fact that the centrifugal force is reduced, so that the drying object close to the inner cylinder wall is heated;
and when the uniform heating step is executed for a second preset time, and/or when the temperature in the inner cylinder reaches a stable state, and/or when the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state, ending the uniform heating step.
2. The drying method for washing and drying integrated machine according to claim 1,
the condition for ending the uniform heating step is any one of the following conditions a to f:
a, when the temperature in the inner cylinder reaches a stable state;
the condition b is that when the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state;
a condition c, when the temperature in the inner cylinder reaches a steady state and when the difference between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a steady state;
a condition d that the temperature in the inner cylinder reaches a stable state after the uniform heating step is executed for the second preset time;
a condition e, after the uniform heating step is executed for the second preset time and after the difference between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state;
and a condition f, after the uniform heating step is executed for the second preset time, after the temperature in the inner cylinder reaches a stable state and after the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches the stable state.
3. The drying method for a washer dryer according to claim 1 or 2,
the method for determining the second preset time comprises the following steps: and calculating the time required by the moisture content of the drying object to reach 10% -30% according to the total weight of the drying object and the highest rotating speed which can be reached during the dehydration of the washing program, wherein the time is used as the second preset time.
4. The drying method for washing and drying integrated machine according to claim 1,
in the low-speed shaking-up step: the first rotating speed is in the range of 20 rpm-30 rpm, the inner barrel rotates forwards and backwards alternately, and the rotating-stopping ratio is 120s:5 s;
in the uniform heating step: the second rotating speed is in the range of 30-60 rpm, the inner barrel rotates forwards and backwards alternately, and the rotating-stopping ratio is 50s:5 s.
5. The drying method for a washer dryer according to claim 1 or 2, further comprising, after said step of drying with acceleration:
and a speed and wrinkle reducing step of rotating the inner drum at a fourth rotation speed capable of reducing wrinkles of the drying object, wherein the fourth rotation speed is less than the third rotation speed.
6. The drying method for a washer dryer as claimed in claim 5, further comprising:
a first comparing step before the accelerated drying step, wherein the first comparing step comprises:
comparing the total weight of the drying object with a first preset value;
when the total weight of the drying object is smaller than the first preset value, directly entering the speed reduction and wrinkle reduction step after the uniform heating step is finished;
and when the total weight of the drying object is more than or equal to the first preset value, entering the accelerated drying step after the uniform heating step is finished.
7. The drying method for washing and drying integrated machine according to claim 5,
when the low-speed shaking step is executed for a first preset time, ending the low-speed shaking step and entering the next step;
and when the accelerated drying step is executed for a third preset time, and/or when the temperature in the inner cylinder reaches a stable state, and/or when the difference value between the temperature in the inner cylinder and the temperature of the water in the outer cylinder reaches a stable state, ending the accelerated drying step and entering the next step.
8. The drying method for washing and drying integrated machine according to claim 6,
the first preset time is determined by the following four modes singly or in combination:
firstly, the first preset time is a preset fixed time;
secondly, the first preset time is determined according to the total weight of the drying object;
thirdly, the first preset time is determined according to the actual highest rotating speed of the inner cylinder;
fourthly, the first preset time is determined according to the material of the drying object.
9. The drying method for washing and drying integrated machine according to claim 5,
in the step of accelerated drying: the third rotating speed is within the range of 90-120 rpm, the inner cylinder rotates forwards and backwards alternately, and the time ratio of the rotation of the inner cylinder at the third rotating speed to the rotation of the inner cylinder at the second rotating speed is 5-10 min: 5-10 min;
in the speed and wrinkle reducing step: the fourth rotating speed is in the range of 20 rpm-30 rpm, the inner barrel rotates forwards and backwards alternately, and the rotating-stopping ratio is 120s:5 s.
10. An all-in-one washer dryer, characterized in that the drying method for the all-in-one washer dryer of any one of claims 1 to 9 is adopted.
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| CN201610663802.XA CN107724023B (en) | 2016-08-12 | 2016-08-12 | Drying method for washing and drying integrated machine and washing and drying integrated machine |
| PCT/CN2017/097162 WO2018028688A1 (en) | 2016-08-12 | 2017-08-11 | Drying method for washer-dryer integrated machine and washer-dryer integrated machine |
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| CN109610143B (en) * | 2018-11-27 | 2022-10-04 | 威海天力电源科技有限公司 | Clothes dryness and wetness degree detection device and method based on temperature sensing |
| CN112160119A (en) * | 2020-09-15 | 2021-01-01 | 海信（山东）冰箱有限公司 | Control method of washing machine |
| CN113089254A (en) * | 2021-03-19 | 2021-07-09 | 海信（山东）冰箱有限公司 | Heating and drying control method of washing machine, storage medium and multi-drum washing machine |
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| EP2927367A1 (en) * | 2014-03-31 | 2015-10-07 | Electrolux Appliances Aktiebolag | Method of conducting a drying cycle in a laundry treating machine, laundry treating machine and electronic controller unit |
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| KR100803119B1 (en) * | 2003-08-26 | 2008-02-14 | 엘지전자 주식회사 | Method for controlling drying process of drum type washing and drying machine |
| KR20050066437A (en) * | 2003-12-26 | 2005-06-30 | 엘지전자 주식회사 | (a) drum washing machine and method of controlling the same |
| CN1888294A (en) * | 2005-06-30 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Drier and controlling method thereof |
| CN1978774B (en) * | 2005-12-01 | 2011-05-25 | 海尔集团公司 | Method for preventing clothing wrinkles during drying process |
| CN102899871B (en) * | 2012-10-11 | 2017-07-18 | 青岛海尔滚筒洗衣机有限公司 | It is a kind of to change the method and dryer for improving clothes drying effect by drum speed |
| CN104727109B (en) * | 2013-12-18 | 2018-12-25 | 青岛海尔洗衣机有限公司 | A kind of dryer and clothes-drying method |
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| CN1904195A (en) * | 2005-07-30 | 2007-01-31 | 乐金电子(天津)电器有限公司 | Control method of automatic drying |
| EP2927367A1 (en) * | 2014-03-31 | 2015-10-07 | Electrolux Appliances Aktiebolag | Method of conducting a drying cycle in a laundry treating machine, laundry treating machine and electronic controller unit |
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