CN113957684A

CN113957684A - Dryer and method for drying quilt

Info

Publication number: CN113957684A
Application number: CN202010702586.1A
Authority: CN
Inventors: 刘行; 冶萍
Original assignee: BSH Electrical Appliances Jiangsu Co Ltd
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2022-01-21
Also published as: DE102021207325A1

Abstract

A method for drying quilt by a dryer comprises running a drying program, wherein, in the early stage of the drying program, a plurality of rotation periods are included, more than half of the rotation periods, a drying cylinder is rotated to a cylinder attaching rotation speed which enables the centrifugal acceleration of the peripheral wall of the drying cylinder to be larger than the gravity acceleration, so that the quilt is attached to the cylinder, and simultaneously, hot air is supplied into the drying cylinder or the air in the drying cylinder is heated; and in the later stage of the drying program, a plurality of rotation periods are included, and the rotation speed of the drying cylinder is lower than that of the pasting cylinder in more than a half of the rotation periods. By the method, the quilt can be uniformly dried and is more fluffy. The invention also discloses a dryer capable of realizing the method.

Description

Dryer and method for drying quilt by using same

[ technical field ] A method for producing a semiconductor device

The invention relates to a dryer and a quilt drying method thereof, belonging to the technical field of household appliances.

[ background of the invention ]

The quilt is easy to become dirty and yellow after long-term use, and mites are bred. In the humid plum rain weather in the south, the quilt is not fluffy and dry any more. Therefore, the quilt is required to be washed and dried urgently.

However, because quilts are bulky, with padding, drying them using a dryer can be challenging. For example, when the quilt is wet, the filler becomes very thin, the upper quilt layer and the lower quilt layer are tightly attached together, the whole quilt is in a very large sheet shape, and the whole quilt is easy to roll up in the rotating process of the drying cylinder and wraps partial areas, so that the quilt is difficult to dry. With the drying process, the water content in the filler is continuously reduced, and the volume is continuously expanded. The quilt with large volume is difficult to turn over in the drying cylinder, and the hot air is difficult to penetrate into the drying cylinder, so that uneven drying is easily caused.

[ summary of the invention ]

An object of the present invention is to provide a method for drying a quilt in a dryer, which enables the quilt to be sufficiently and uniformly dried.

An embodiment of the present invention includes a method of drying a quilt in a dryer, comprising:

a drying process is run, wherein,

in the early stage of the drying program, a plurality of rotation periods are included, and the rotation period exceeds a half of the rotation period, the drying cylinder is rotated to the cylinder attaching rotation speed which enables the centrifugal acceleration of the peripheral wall of the drying cylinder to be larger than the gravity acceleration, so that a quilt is attached to the cylinder, and hot air is supplied to the drying cylinder or the air in the drying cylinder is heated;

and in the later stage of the drying program, the drying program comprises a plurality of rotation periods, and the rotation speed of the drying cylinder is lower than that of the pasting cylinder in more than a half of the rotation periods.

The dryer refers to a machine capable of providing a fabric drying function, and may be a pure dryer or a machine with both washing and drying functions.

The embodiment of the invention can be used for drying various thinner and lighter quilts, and is particularly suitable for quilts with more volume expansion after drying, such as down quilts, chemical fiber quilts and the like.

The rotating speed of the pasting cylinder is the rotating speed which can be reached by enabling a quilt to be pasted on the peripheral wall of the drying cylinder and meanwhile applying pressure on the peripheral wall as small as possible. The cylinder rotation speed is therefore significantly less than the usual dewatering rotation speed. The rotating speed of the cylinder pasting also can not be fixed and can be reduced along with the reduction of the water content in the quilt, for example.

The drying procedure adopts the cylinder pasting rotating speed in the earlier stage to enable the quilt to be pasted with the cylinder, hot air can be in contact with the quilt in the middle part first, drying from inside to outside is achieved, and the problems that the outside is dried first, the volume expands, the inside is more difficult to contact with the hot air, and the drying is uneven are avoided.

And the quilt moisture content is reduced and the volume is expanded in the later period of the drying procedure, and the quilt is pressed on the peripheral wall of the drying cylinder at a higher cylinder pasting rotating speed, so that the quilt is not easy to be fluffy. The drying cylinder is rotated at a rotating speed lower than that of the pasting cylinder, so that a beating effect can be achieved, and the quilt is fluffy.

In some embodiments, the drying program includes a thermal dehydration phase in which the drum rotates in a first direction at a dehydration rotation speed, and a shaking step is performed immediately after the thermal dehydration phase, and in the shaking step, the drum rotates in a second direction opposite to the first direction at a rotation speed lower than that of the drum during a first rotation period immediately after the thermal dehydration phase. In the thermal dehydration stage, the drying cylinder rotates at the dehydration rotation speed, so that the quilt is generally tightly attached to the cylinder wall to form a thin sheet shape, the sheet-shaped quilt falls off from the cylinder wall after the thermal dehydration stage is finished, and simultaneously, the sheet-shaped quilt is easy to form a roll shape due to the rotation inertia, namely the roll forming is called as rolling for short. The first rotation period of the shaking-up step is opposite to the rotation direction of the drying drum in the thermal dehydration stage, so that the quilt can be prevented from being rolled up in time, and the formed roll can be opened at the same time.

In some embodiments, at a later stage of the drying program, at least one spin cycle greater than the drum rotation speed is inserted during a spin cycle in which the drum is rotating less than the drum rotation speed, and the drum is rotated in the second direction during the inserted spin cycle. The high rotating speed opposite to the direction of the hot dehydration is adopted, so that the formed roll is opened, and the roll beating phenomenon is further prevented or reduced.

In some embodiments, the drum is alternately rotated in a first direction and a second direction during a pre-drying period and after the shaking step, wherein the rotation speed of the drum in the first direction is a beating rotation speed for forming a beating effect of the quilt, and the rotation speed of the drum in the second direction is a cylinder sticking rotation speed, wherein the beating rotation speed is lower than the cylinder sticking rotation speed. The lower rotating speed is adopted in the rotating period in the same direction as the hot dehydration stage, so that the beating effect is achieved, and the phenomenon of further forming or aggravating rolling is prevented; and the cylinder-sticking rotating speed is adopted in the rotating period opposite to the thermal dehydration stage, the formed roll quilt can be opened and stuck to the cylinder, and the roll quilt is rotated towards the opening and unwinding direction by the inertia force when the drying cylinder is stopped, so that the formed roll is gradually opened.

In some embodiments, the centrifugal acceleration of the peripheral wall of the drying cylinder is less than 2 times the gravitational acceleration at the drum rotation speed. As mentioned above, the drum-attaching rotation speed is the rotation speed which can be achieved by attaching the quilt to the peripheral wall of the drying drum while pressing the peripheral wall as little as possible. Generally, the centrifugal acceleration of the peripheral wall of the drying cylinder is slightly larger than the gravity acceleration and is not easy to be too large, so that the centrifugal acceleration is preferably smaller than 2 times of the gravity acceleration, and the phenomenon that the drying and fluffing effects are influenced because a quilt is excessively pressed on the peripheral wall is prevented.

In some embodiments, the drum is alternately rotated in the first direction and the second direction for less than 20 seconds during each rotation cycle of the sub-drying program other than the thermal dehydration stage. The drying cylinder continuously rotates towards one direction for a long time and is easy to curl, hot air is not easy to contact all parts of the quilt comprehensively, smaller one-way rotation time is adopted, reversing frequency is increased, uniform contact of the hot air is facilitated, full beating of the quilt is facilitated, and the quilt is fluffy.

At the later stage of the quilt drying procedure, the rotating speed of the drying cylinder is set to enable the centrifugal acceleration of the peripheral wall of the drying cylinder to be smaller than the gravity acceleration.

The above embodiments may be combined arbitrarily.

Embodiments of the present invention also provide a dryer including a control device configured to control the dryer to dry a quilt according to the methods of the various embodiments described above.

Some embodiments of the invention will be illustrated in the following description with reference to the drawings.

[ description of the drawings ]

FIG. 1 is a diagram illustrating a drying cylinder rotating at a cylinder-attaching speed;

FIG. 2 is a diagram showing the states of the drying cylinder and the cooling medium in the sub-drying process;

FIG. 3 is a state diagram of the drum during a thermal dehydration stage;

fig. 4A-4C are diagrams illustrating the beating effect caused by the quilt being changed at different positions when the drying drum is rotated at the beating speed.

[ detailed description ] embodiments

As shown in fig. 1, the dryer includes a drying chamber 2 and a drum 4 rotatably driven in the drying chamber 2. The drying drum 4 is in space communication with the drying chamber 2 so as to be capable of communicating air with each other. The drying drum 4 is axially horizontally arranged or obliquely arranged. The circumferential wall 40 of the drying cylinder 4 is provided with a plurality of lifting ribs 6. During the rotation of the drum 4, the lifting ribs 6 can drive the fabric in the drum, for example, to be lifted upwards by the cover 10. The dryer further includes a control device (not shown) for controlling various electrical components in the dryer, and for operating the sub-drying program according to the program setting.

In the embodiment shown in fig. 2, the sub-drying process includes a preheating stage, a thermal dehydration stage, a heating stage, a main drying stage, and a cooling stage. In the figure, a first curve L1 represents a cooling medium state, and a second curve L2 represents a rotation state of the drum. The cooling medium is usually water. In the preheating stage, the thermal dehydration stage and the heating stage, a cooling medium is not supplied, and only hot air is supplied into the drying drum 4, or a heating means may be directly provided in the drying chamber 2, thereby heating air in the drying drum 4. The hot air heats the quilt 10 in the drying cylinder 4, so that the moisture in the quilt is evaporated. The hot air mixed with the water vapor becomes damp and hot.

After entering the main drying stage, the cooling medium is started to exchange heat with the hot and humid air, so that water vapor in the air is condensed into water. In this manner, the moisture in the quilt 10 is gradually dried.

In the final cooling phase, in which the comforter 10 is already close to drying, the supply of cooling medium is continued, but the supply of hot air or the heating of air is stopped.

The whole sub-drying program comprises a plurality of rotation cycles. The direction of rotation of drum 4 is opposite for adjacent cycles of rotation. In a second curve L2 shown in fig. 2, the broken lines upward and downward, bounded by a middle straight line L0, represent the rotational speeds of drum 4 in different directions, respectively. Referring to fig. 1 to 4C, the portion above the middle line L0 is the drum 4 rotating in the first direction a; the portion below the intermediate line L0 is for drum 4 to rotate in a second direction B opposite to the first direction a.

In the early stage of the quilt drying program, in more than half of the rotation period, the drying cylinder 4 is rotated to the cylinder attaching rotation speed which enables the centrifugal acceleration of the peripheral wall 40 of the drying cylinder 4 to be larger than the gravity acceleration, so that the quilt 10 is attached to the cylinder, and simultaneously, hot air is supplied into the drying cylinder 4 or the air in the drying cylinder is heated.

In the drum-attaching rotation speed, the centrifugal acceleration of the peripheral wall 40 of the drying drum 4 is less than 2 times of the gravitational acceleration, and usually slightly greater than the gravitational acceleration. In some embodiments, the cartridge speed may be between 60 and 100 revolutions per minute.

When the drying cylinder 4 rotates at the cylinder attaching speed, as shown in fig. 1, the quilt 10 is attached to the peripheral wall 40 of the drying cylinder 4, but the smallest pressing force is applied to the peripheral wall 40 of the drying cylinder 4, so that the quilt 10 is prevented from being in a pressing state.

In practice, the drying drum 4 may be rotated at the drum rotation speed in each rotation cycle in both directions, in addition to the shaking step in the preheating phase and the heating phase. In the early stage of main drying, the drying cylinder 4 rotates along one direction at the cylinder attaching speed.

In the later stage of the quilt drying procedure, the rotating speed of the drying cylinder 4 is lower than the rotating speed of the pasting cylinder within more than half of the rotating period, so that the centrifugal acceleration of the peripheral wall 40 of the drying cylinder 4 is smaller than the gravity acceleration. For example, a rotational speed of 50 revolutions per minute is used.

In the embodiment shown in fig. 2, the drum 4 may be rotated at a lower speed than the drum during the other direction in the early stage of the main drying, and the drum may be rotated at a lower speed than the drum during each of the two directions of the middle stage of the main drying, the later stage of the main drying and the cooling stage.

The "early stage" is only a stage which is not strictly half the time of the program running process relative to the "late stage".

The preliminary stage of the quilt drying process comprises a thermal dehydration stage. For example, the preheating stage shown in fig. 2 is followed by a thermal dehydration stage. During the thermal dehydration phase, drum 4 is rotated in a first direction a at a dehydration rotational speed. At this time, the rotating speed is high and can exceed 1000 revolutions per minute, so that the water in the quilt can be thrown out. As shown in fig. 3, since the rotation speed of the drying drum 4 is very high in the thermal dehydration stage, a thin sheet is formed by centrifugal pressing by a quilt and closely attached to the peripheral wall 40 of the drying drum 4. Therefore, the quilt after the hot dehydration is easy to form the rolling phenomenon.

The heat dehydration stage is followed by a shaking-off step. In the shaking-out step, the drying drum 4 is rotated in a second direction B opposite to the first direction a at a lower rotation speed than the drum during a first rotation period following the thermal dehydration stage. Followed by several periods of low speed rotation in alternating directions.

In the latter stage of the sub-drying process, during the rotation of the drying drum 4 lower than the rotation speed of the patch drum, for example, in the middle stage of the main drying and in the latter stage of the main drying as shown in fig. 2, at least one rotation period higher than the rotation speed of the patch drum is inserted, and the drying drum is rotated in the second direction B during the inserted rotation period. In the at least one higher rotation cycle, the rotation speed of drum 4 may be, for example, about 200 revolutions per minute. The purpose is to open the quilt that the hot dehydration stage probably caused and beat the roll phenomenon.

In the embodiment shown in fig. 2, in the primary drying period, the drying drum 4 rotates alternately in the first direction a and the second direction B, wherein the rotation speed of the drying drum in the first direction a is the beating rotation speed for forming the quilt into beating effect, and the rotation speed of the drying drum in the second direction B is the pasting drum rotation speed, wherein the beating rotation speed is lower than the pasting drum rotation speed.

In a specific embodiment, the beating rotating speed can be adopted in most of the later rotating speed period of the quilt drying program.

As shown in fig. 4A to 4C, when the drying cylinder 4 rotates at a beating speed lower than the cylinder attaching speed, the combined action of the centrifugal force and the lifting ribs 6 at least partially lifts the quilt 10, and when the angle is higher than the center of the drying cylinder 4, the quilt falls off due to the fact that the centrifugal force is not enough to support the quilt to continuously rise, and a beating effect is formed, so that the quilt is more fluffy. The quilt can fully contact with hot air in the rolling process, so that the uniform drying effect is obtained.

In order to facilitate the uniform contact of hot air and enable the quilt to be fully beaten, the drying drum is continuously rotated for less than 20 seconds in each rotation period except the thermal dehydration stage of the quilt drying process.

The various embodiments described above and shown in the drawings are merely illustrative of the invention. Any modification of the present invention by a person of ordinary skill in the related art within the scope of the basic technical idea of the present invention is within the scope of the present invention.

Claims

1. A method for drying a quilt in a dryer, comprising:

a quilt drying program is run, wherein,

in the early stage of a quilt drying program, a plurality of rotation periods are included, and in more than half of the rotation periods, the drying cylinder is rotated to a cylinder attaching rotation speed which enables the centrifugal acceleration of the peripheral wall of the drying cylinder to be larger than the gravity acceleration, so that a quilt is attached to the cylinder, and hot air is supplied into the drying cylinder or air in the drying cylinder is heated;

in the later stage of the quilt drying program, a plurality of rotation periods are included, and the rotation speed of the drying cylinder is lower than that of the pasting cylinder in more than a half of the rotation periods.

2. The method of claim 1, wherein: the method comprises the steps that a quilt drying program comprises a thermal dehydration stage, a drying cylinder rotates along a first direction at a dehydration rotating speed, a shaking-out step is carried out after the thermal dehydration stage is finished, and in the shaking-out step, the drying cylinder rotates along a second direction opposite to the first direction at a rotating speed lower than that of a cylinder in a first rotating period of the thermal dehydration stage.

3. The method of claim 2, wherein: and in the later stage of the quilt drying program, inserting at least one rotation period higher than the rotating speed of the pasting cylinder in the rotation process that the drying cylinder is lower than the rotating speed of the pasting cylinder, and rotating the drying cylinder along the second direction in the inserted rotation period.

4. The method of claim 2, wherein: in the early stage of a quilt drying procedure and after the shaking step, the drying cylinder rotates along a first direction and a second direction alternately, wherein the rotating speed of the drying cylinder rotating along the first direction is a beating rotating speed for enabling the quilt to form a beating effect, the rotating speed of the drying cylinder rotating along the second direction is a pasting cylinder rotating speed, and the beating rotating speed is lower than the pasting cylinder rotating speed.

5. The method of claim 1, wherein: and under the rotating speed of the cylinder, the centrifugal acceleration of the peripheral wall of the drying cylinder is less than 2 times of the gravity acceleration.

6. The method of claim 1, wherein: in each rotation period of the sub-drying process except the thermal dehydration stage, the drying drum rotates alternately in the first direction and the second direction, and the time for which the drying drum rotates continuously is less than 20 seconds.

7. The method of claim 1, wherein: at the later stage of the quilt drying procedure, the rotating speed of the drying cylinder is set to enable the centrifugal acceleration of the peripheral wall of the drying cylinder to be smaller than the gravity acceleration.

8. A dryer including control means, characterised in that said control means is arranged to control the dryer to dry a comforter in accordance with the method of any one of claims 1 to 7.