JP2016047147A - Washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing and drying machine capable of surely improving drying performance and capable of shortening drying time.SOLUTION: A washing and drying machine includes: a water tub (2) arranged in an outer case (1); a drum (3); a drive motor (4) for rotationally driving the drum (3); a heat pump unit (13) for heating air; a blower device (11) for circulating air between the drum (3) and the heat pump unit (13); and a control unit (15) for controlling operations of the drive motor (4), the heat pump unit (13) and the blower device (11) and for controlling a series of steps including washing, rinsing, dewatering and drying. In a dewatering step before going into a drying step, the control unit (15) increases the rotation number of the drum (3) by the drive motor (4) to the maximum rotation number, and then lowers it from the maximum rotation number by the predetermined rotation number, and starts the operation of the heat pump unit (13) and the blower device (11).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a washing dryer having a drying function.

  Conventionally, as a laundry dryer, a heating device and a blower device are operated in advance from the dehydration step before the drying step, the inside of the laundry dryer is preheated, the drying performance is improved, and the drying time for drying is shortened. (For example, refer to Japanese Patent No. 4507966 (Patent Document 1)).

  When the drive motor, the heating device, and the blower device that drive the rotation tank in the dehydration process are operated simultaneously, the total input current amount of the drive motor, blower device, and heating device becomes very large, and the predetermined input current amount May be exceeded. For this reason, in the conventional washing and drying machine, while maintaining the input current amount of the drive motor at a constant amount, the input current amounts of the heating device and the blower device are increased or decreased, and the total input current of the drive motor, heating device, and blower device is increased. The amount is controlled so as not to exceed a predetermined input current amount.

  However, in the conventional washing and drying machine, when the input current amount of the driving motor is large, the input current amount of the heating device and the blower device is reduced, so that the inside of the washing dryer cannot be sufficiently preheated by the heating device and the blower device. is there. In this case, there is a problem that the drying performance cannot be improved and the drying time may not be shortened.

Japanese Patent No. 4507966

  Then, the subject of this invention is providing the washing-drying machine which can improve drying performance reliably and can shorten drying time.

In order to solve the above problems, the washing and drying machine of the present invention is:
An outer box,
A water tank disposed in the outer box;
A rotating tub that is rotatably arranged in the water tub, and stores the laundry;
A driving device for rotationally driving the rotating tank;
A heating device for heating air;
A blower for circulating air between the rotating tank and the heating device;
A controller that controls operations of the driving device, the heating device, and the blower, and controls a series of steps including washing, rinsing, dehydration, and drying;
In the dehydration process before entering the drying process, the controller raises the rotational speed of the rotating tank to a predetermined maximum rotational speed by the driving device, and then determines a predetermined rotational speed from the maximum rotational speed. And the operation of the heating device and the blower device is started.

Moreover, in the washing and drying machine of one embodiment,
The controller, after gradually increasing the rotation speed of the rotating tank to the maximum rotation speed, lowers the rotation speed from the maximum rotation speed to a rotation speed one stage before the maximum rotation speed, and the heating device and the above Start the operation of the blower.

Moreover, in the washing and drying machine of one embodiment,
The said control part starts the action | operation of the said heating apparatus and the said air blower, when predetermined time passes from the time of raising the rotation speed of the said rotation tank to the said highest rotation speed.

  The washing / drying machine of the present invention lowers the rotation speed from the maximum rotation speed by a predetermined rotation speed and starts the operation of the heating device and the air blowing device in the dehydration process, so that the drying performance can be reliably improved and the drying time is shortened. it can.

FIG. 1 is a diagram schematically showing a schematic configuration of a drum type washing / drying machine according to an embodiment of the present invention. FIG. 2 is a perspective view showing the appearance of the drum type washing and drying machine. FIG. 3 is a control block diagram of the drum type washing and drying machine. FIG. 4 is a graph showing changes over time in the number of rotations of the drum of the drum type washing and drying machine, the blower, and the compressor of the heat pump unit in the dehydration process.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a diagram schematically illustrating a schematic configuration of a drum-type washing / drying machine according to a first embodiment of the present invention. FIG. 2 is a perspective view showing an appearance of the drum type washing and drying machine.

  As shown in FIG. 1, the drum type washing and drying machine includes an outer box 1, a water tank 2 disposed in the outer box 1, and a front side predetermined in the horizontal direction in the water tank 2. A bottomed cylindrical drum 3 that accommodates laundry 5 such as clothes, and a drive motor 4 that rotationally drives the drum 3 around the central axis J. Prepare. The water tank 2 and the drum 3 are opened on the door 21 side, the door 21 is opened, and the laundry 5 can be taken in and out of the drum 3. By closing the door 21, the water tank 2 is kept watertight and airtight. The central axis J may be substantially parallel to the horizontal direction. The drum 3 is an example of a rotating tub, and the drive motor 4 is an example of a drive device.

  In the drum type washing and drying machine, a heat pump unit 13 as an example of a heating device is disposed at the lower part on the back side of the outer box 1. An air circulation duct 23 is connected between the heat pump unit 13 and the suction port 22 of the water tank 2, and a blower duct 26 is connected between the heat pump unit 13 and the air outlet 25 of the water tank 2. The blower 11 is connected to the blower duct 26.

  In the drum 3, a plurality of through holes (not shown) are formed on the peripheral surface 3 </ b> A to allow water and air to flow between the drum 3 and the water tank 2. In addition, a plurality of air introduction holes (not shown) communicating with the air outlet 25 of the water tank 2 are formed on the bottom surface 3 </ b> B of the drum 3. As a result, the dried heated air supplied from the heat pump unit 13 via the air duct 26 can be introduced into the drum 3 from the outlet 25 as indicated by an arrow Y in FIG. Further, the heated air deprived of moisture from the laundry 5 in the drum 3 becomes hygroscopic air, and as shown by an arrow Z in FIG. 1, the heated air escapes from the through hole of the peripheral surface 3A of the drum 3 into the water tank 2 and sucks the water tank 2 The air is sucked from the port 22 toward the air circulation duct 23 and is introduced into the heat pump unit 13 through the air circulation duct 23.

  In the heat pump unit 13, the evaporator 10, the compressor 7, the condenser 8, and the expansion valve 9 are connected by the refrigerant pipe 14, and the refrigerant compressed by the compressor 7 includes the condenser 8, the expansion valve 9, and the evaporator 10. It flows in order. Further, a temperature sensor 16 or the like is attached to the refrigerant pipe 14 on the discharge side of the compressor 7, and the control unit 15 described later controls the capability of the heat pump unit 13 according to the refrigerant temperature measured by the temperature sensor 16. .

  FIG. 3 is a control block diagram of the drum type washing and drying machine.

  The control unit 15 includes a microcomputer and an input / output circuit, and is connected to the operation display unit 60, the drive motor 4, the blower 11, the heat pump unit 13, the rotation speed sensor 51, and the temperature sensor 16. Based on signals from the operation display unit 60, detection signals from the rotation speed sensor 51 and the temperature sensor 16, the control unit 15 controls the operation of the drive motor 4, the blower 11, the heat pump unit 13, and the like. A washing process, a rinsing process, a dehydration process and a drying process are performed. The rotation speed sensor 51 sends a detection signal indicating the rotation speed of the drive motor 4 to the control unit 15. The temperature sensor 16 sends a detection signal indicating the temperature of the refrigerant of the heat pump unit 13 to the control unit 15.

  In addition, the control unit 15 includes a rewritable nonvolatile memory 48 and a timer 49. The memory 48 stores in advance a control program for controlling the drive motor 4, the blower 11, the heat pump unit 13, the operation display unit 60, and the like.

  As shown in FIG. 2, the operation display unit 60 inputs a driving operation selection instruction to the front of the outer box 1 and displays the driving state. When selection of a driving course, time setting of each process, or the like is input from the operation display unit 60, the selection or setting is input to the control unit 15 (see FIG. 3), and the washing process and the rinsing process are controlled by the control unit 15. The dehydration step and the drying step can be sequentially executed as a series of operations.

  FIG. 4 is a graph showing the rotation speed of the drum 3, the rotation speed of the blower 11, and the rotation speed of the compressor 7 of the heat pump unit 13 in the dehydration process.

  Hereinafter, the operation of the drive motor 4, the blower 11, and the heat pump unit 13 in the dehydration process before entering the drying process of the drum type washing and drying machine will be described. The drum-type washing / drying machine also performs a washing process, a rinsing process, a drying process, and the like, but since it is not related to the gist of the present invention, description of the configuration and operation thereof will be omitted.

  When the dehydration process is started, first, as shown in FIG. 4, the drive motor 4 increases the rotational speed of the drum 3 to a predetermined first rotational speed (900 rpm). As the drum 3 rotates, the laundry 5 is stirred and dehydrated in the drum 3.

  Next, the drive motor 4 holds the state where the rotation speed of the drum 3 is the first rotation speed for a predetermined time T1. Thereafter, the drive motor 4 increases the rotation speed of the drum 3 to a predetermined second rotation speed (1100 rpm), and holds the state at the second rotation speed for a predetermined time T2.

  Next, the drive motor 4 increases the rotation speed of the drum 3 to a predetermined third rotation speed (1200 rpm) and holds the state at the third rotation speed for a predetermined time T3. . Then, the drive motor 4 increases the rotation speed of the drum 3 to a predetermined fourth rotation speed (1250 rpm), and the state at the fourth rotation speed is set to a predetermined time T4 (for example, 5). Min) hold. The fourth rotational speed is an example of the maximum rotational speed.

  Next, the drive motor 4 lowers the number of revolutions of the drum 3 from the maximum number of revolutions to the third number of revolutions, and starts the operation of the heat pump unit 13 and the air blower 11 shown in FIG. At this time, the rotation speed of the compressor 7 of the heat pump unit 13 is increased to a predetermined rotation speed (2800 rpm), and the rotation speed of the blower 11 is increased to a predetermined rotation speed (2500 rpm) and held.

  Here, when the operation of the heat pump unit 13 and the blower 11 is started, as shown in FIG. 1, first, the refrigerant is compressed by the compressor 7, and this refrigerant passes from the compressor 7 through the refrigerant pipe 14 to the condenser 8. The expansion valve (throttle means) 9, the evaporator 10, and the compressor 7 are circulated in this order. The heat of the compressed refrigerant flows into the condenser 8 and is radiated to the air in contact with the fins 8B provided in the refrigerant pipe 8A disposed in the condenser 8, and this air becomes heated air. The heated air passes through the air duct 26 by the air blower 11 and is supplied from the air outlet 25 into the drum 3.

  As a result, the heated air preheats the inside of the drum 3 and becomes moisture-absorbing air that has taken away moisture from the laundry 5 stirred in the drum 3 and is sucked into the air circulation duct 23 from the suction port 22.

  Finally, the drive motor 4 stops the rotation of the drum 3 when the state in which the rotation speed of the drum 3 is the third rotation speed is held for a predetermined time T5. Thereby, a dehydration process is complete | finished.

  According to the drum type washing / drying machine having the above-described configuration, the rotation speed of the drum 3 is decreased from the maximum rotation speed to the third rotation speed during the dehydration process, and the operation of the heat pump unit 13 and the blower 11 is started. . For this reason, even if the drive motor 4, the heat pump unit 13 and the blower 11 are operated simultaneously, the total input current amount of the drive motor 4, the heat pump unit 13 and the blower 11 is a predetermined input current amount (for example, in a general household). 15 amps), and the input current amounts of the heat pump unit 13 and the blower 11 can be kept constant. Thereby, it can be made to operate | move without reducing the capability of the heat pump unit 13 and the air blower 11, and the inside of a drum type washing-drying machine can fully be preheated. Further, the temperature rise of the refrigerant is accelerated by the heat of the refrigerant that has been compressed and heated. Therefore, the drying performance of the drum type washing and drying machine can be improved reliably, and the drying time can be shortened.

  Further, since the rotational speed of the drum 3 is increased stepwise up to the maximum rotational speed, a sudden change in the rotational speed of the drum 3 can be prevented and the dewatering performance can be improved. Moreover, since the rotation speed of the drum 3 is lowered from the maximum rotation speed to the third rotation speed and the operation of the heat pump unit 13 and the blower 11 is started, the rotation speed of the drum 3 can be rapidly lowered.

  Further, when the time T4 has elapsed from when the number of rotations of the drum 3 is increased to the maximum number of rotations, the heat pump unit 13 and the blower 11 are started to operate, so that the laundry 5 can be sufficiently dehydrated. Thus, the drying performance can be improved more reliably.

  Next, modified examples (second to eighth embodiments) of the first embodiment will be described.

(Second Embodiment)
In the first embodiment, the drive motor 4 decreases the rotational speed of the drum 3 from the maximum rotational speed to the third rotational speed, but is not limited thereto. Predetermined, for example, 10 rpm, so that the decrease in the input current amount of the washing / drying machine due to the decrease in the rotation speed of the rotating tub is greater than the increase in the input current amount of the washing / drying machine due to the start of the operation of the blower and the heating device. You may lower the rotation speed of a rotation tank by the determined rotation speed. Further, the rotational speed of the rotary tank may be lowered stepwise to a predetermined rotational speed such as the second rotational speed or the first rotational speed.

(Third embodiment)
In the first embodiment, the drive motor 4 increases the rotational speed of the drum 3 stepwise from the first rotational speed to the fourth rotational speed (maximum rotational speed). However, the present invention is not limited to this. . For example, the rotation speed of the rotating tank may be increased stepwise in five steps or more up to the maximum rotation number, or may be increased stepwise in three steps or less. Moreover, you may raise to the maximum rotation speed suddenly, without raising the rotation speed of a rotation tank in steps.

(Fourth embodiment)
In the first embodiment, the drive motor 4 gradually increases the rotation speed of the drum 3 from the first rotation speed (900 rpm) to 1100 rpm, 1200 rpm, and 1250 rpm (maximum rotation speed). For example, the first to fourth rotation speeds may be other rotation speeds, for example, the first rotation speed may be 1000 rpm.

(Fifth embodiment)
In the first embodiment, the drive motor 4 holds the state of the maximum rotation speed for a predetermined time T4 and decreases the rotation speed of the drum 3, but the present invention is not limited to this. For example, when the moisture content of the laundry is detected and the moisture content falls below a predetermined amount, the rotational speed of the rotating tub may be lowered.

(Sixth embodiment)
In the first embodiment, when the operation of the heat pump unit 13 and the blower 11 is started, the rotational speed of the blower 11 is increased to 2500 rpm, and the rotational speed of the compressor 7 of the heat pump unit 13 is increased to 2800 rpm. However, it is not limited to this. For example, the rotational speed of the blower or the compressor may be increased to another rotational speed such as 1000 rpm, or may be increased stepwise. Moreover, you may stop a heat pump unit and an air blower after progress for a fixed time from an operation start.

(Seventh embodiment)
In the said 1st Embodiment, although the heat pump unit 13 and the air blower 11 act | operated during the spin-drying | dehydration process, it is not restricted to this. For example, the heat pump unit and the air blower may be operated also in the washing process and the rinsing process.

(Eighth embodiment)
In the said 1st Embodiment, although the heat pump unit 13 was provided as an example of a heating apparatus, not only this but a heater etc. may be provided, for example.

  Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, the first to eighth embodiments described above may be combined as appropriate to form a washing / drying machine according to an embodiment of the present invention.

  The present invention and the embodiments are summarized as follows.

In order to solve the above problems, the washing and drying machine of the present invention is:
Outer box 1 and
A water tank 2 disposed in the outer box 1;
A rotating tub 3 that is rotatably arranged in the water tub 2 and houses the laundry 5;
A driving device 4 for rotationally driving the rotating tub 3;
A heating device 13 for heating air;
A blower 11 that circulates air between the rotary tank 3 and the heating device 13;
A controller 15 that controls the operation of the drive device 4, the heating device 13, and the blower device 11 to control a series of steps including washing, rinsing, dehydration, and drying;
In the dehydration process before entering the drying process, the control unit 15 increases the number of rotations of the rotating tub 3 to a predetermined maximum number of rotations by the driving device 4 and then determines a predetermined value from the maximum number of rotations. And the operation of the heating device 13 and the blower device 11 is started.

  According to the washing / drying machine having the above-described configuration, the rotation speed of the rotary tub 3 is lowered from the maximum rotation speed by a predetermined rotation speed during the dehydration process, and the heating device 13 and the blower device 11 are started to operate. To do. For this reason, even if the drive device 4, the heating device 13, and the blower device 11 are operated simultaneously, the total input current amount of the drive device 4, the heating device 13, and the blower device 11 can be prevented from exceeding a predetermined input current amount. The input current amounts of the heating device 13 and the blower device 11 can be kept constant. Thereby, it can be made to operate | move without reducing the capability of the heating apparatus 13 and the air blower 11, and the inside of a washing dryer can fully be preheated. Therefore, the drying performance of the washing / drying machine can be reliably improved, and the drying time can be shortened.

Moreover, in the washing and drying machine of one embodiment,
The controller 15 increases the rotational speed of the rotary tank 3 stepwise up to the maximum rotational speed, then lowers the rotational speed from the maximum rotational speed to a rotational speed one stage before the maximum rotational speed, and the heating device. 13 and the operation of the blower 11 are started.

  According to the embodiment, since the rotation speed of the rotary tank 3 is increased stepwise up to the maximum rotation speed, a sudden change in the rotation speed of the rotary tank 3 can be prevented, and the dehydration performance can be improved. Moreover, since the rotation speed of the said rotation tank 3 is lowered | hung from the highest rotation speed to the rotation speed before the said highest rotation speed, and the action | operation of the heating apparatus 13 and the air blower 11 is started, the rotation speed of the rotation tank 3 is changed. It can be lowered quickly.

Moreover, in the washing and drying machine of one embodiment,
The control unit 15 starts the operation of the heating device 13 and the blower device 11 when a predetermined time has elapsed since the rotation number of the rotating tub 3 is increased to the maximum rotation number.

  According to the above embodiment, the operation of the heating device 13 and the blower device 11 is started when a predetermined time has elapsed from when the rotational speed of the rotary tub 3 is increased to the maximum rotational speed, so the laundry 5 Can be sufficiently dehydrated, and the drying performance can be improved more reliably.

DESCRIPTION OF SYMBOLS 1 Outer box 2 Water tank 3 Drum 4 Drive motor 5 Laundry 11 Blower 13 Heat pump unit 15 Control part

Claims (3)

An outer box,
A water tank disposed in the outer box;
A rotating tub that is rotatably arranged in the water tub, and stores the laundry;
A driving device for rotationally driving the rotating tank;
A heating device for heating air;
A blower for circulating air between the rotating tank and the heating device;
A controller that controls operations of the driving device, the heating device, and the blower, and controls a series of steps including washing, rinsing, dehydration, and drying;
In the dehydration process before entering the drying process, the controller raises the rotational speed of the rotating tank to a predetermined maximum rotational speed by the driving device, and then determines a predetermined rotational speed from the maximum rotational speed. The washing / drying machine is characterized in that the heating device and the air blowing device are started to be moved downward. In the washing and drying machine according to claim 1,
The controller, after gradually increasing the rotation speed of the rotating tank to the maximum rotation speed, lowers the rotation speed from the maximum rotation speed to a rotation speed one stage before the maximum rotation speed, and the heating device and the above A washing / drying machine characterized by starting operation of a blower. The washing / drying machine according to claim 1 or 2,
Washing and drying, wherein the control unit starts the operation of the heating device and the blower when a predetermined time has elapsed from when the number of rotations of the rotating tub is increased to the maximum number of rotations. Machine.

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