CN108729094B

CN108729094B - Washing and drying machine

Info

Publication number: CN108729094B
Application number: CN201810039095.6A
Authority: CN
Inventors: 小池裕之; 渡边光; 曾我丈; 菅原道太; 绵引伸一; 高田健太郎
Original assignee: Hitachi Global Life Solutions Inc
Current assignee: Hitachi Global Life Solutions Inc
Priority date: 2017-04-13
Filing date: 2018-01-16
Publication date: 2020-09-15
Anticipated expiration: 2038-01-16
Also published as: JP6678621B2; TWI656257B; CN108729094A; JP2018175392A; TW201837261A

Abstract

The invention provides a washing dryer, which can heat the washing such as blanket sensitive to heat to kill the mites and effectively remove the killed mites from the washing. In a washing step or a rinsing step performed after a heating process of supplying warm air into a washing tub is performed, a drive unit is operated in a first drive manner of rotating a pulsator in a state where the washing tub is stationary.

Description

Washing and drying machine

Technical Field

The present invention relates to a washing and drying machine for washing blankets, bedclothes, and the like.

Background

In order to clean blankets and bedding which are in direct contact with human skin and have many opportunities, the blankets and bedding are generally washed, dried in the sun, dried in the air, and sucked by a dust collector. The feces and bodies of mites can be removed by washing and cleaning, but the mites are not easily killed by washing and sun drying, and in addition, the mites tightly caught on the fibers of the thick blanket or bedding are not easily sucked.

The following experimental results have been reported: the temperature of more than 50 ℃ is kept for 20 minutes, and the mites of the dust mite family which are most sensitive to heat in a room can be killed by 100 percent.

Patent document 1 describes a washing machine having a function of killing mites by heating in this manner. Patent document 1 describes a "washing machine having a sterilizing and acaricidal function, which includes a tub for storing and washing laundry, and a steam generation unit or a hot water supply unit for supplying steam to the tub, wherein the steam generation unit or the hot water supply unit is operated during a period from when laundry is put into the tub to when water is supplied, and supplies steam or hot water to the laundry from above the tub, and thereafter, a normal washing step is started. "

Patent document 2 describes a washing machine having a function of washing a blanket and a bed. Patent document 2 describes "a dehydration washing machine having the following features: in a dewatering washing machine provided with an outer tub supported in a vibration-proof manner in a casing, a washing and dewatering tub disposed in the outer tub, a pulsator disposed in the washing and dewatering tub, and an operation unit and a display unit disposed on the upper part of the casing, water is supplied to the washing and dewatering tub when a bedding washing program is selected by the operation unit until the water level of the supplied water is higher than the high water level of a predetermined volume of laundry, and the high water level of the predetermined volume of laundry is displayed by the display unit, and the washing and dewatering tub and the pulsator are rotated intermittently in one direction as a unit to wash the laundry. "

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 2639045

Patent document 2: japanese patent No. 3232892

Disclosure of Invention

Problems to be solved by the invention

The purpose is to sterilize and kill mites by steam or hot water, but the inner or lower part of the folded blanket or bedding is not substantially able to achieve the desired steam permeation effect.

In addition, in the prior art, the blanket washing procedure of the vertical washing machine is that water is supplied until the water level of the blanket is submerged, the washing and dehydrating tub and the pulsator rotate in one direction as a whole, thereby washing the blanket or the beddings, and the mechanical force acting on the blanket or the beddings is small, so that the effect of completely removing the bodies of the mite dead bodies cannot be achieved.

Accordingly, an object of the present invention is to provide a washing and drying machine which can kill mites by heating laundry such as blankets sensitive to heat and can effectively remove the killed mites from the laundry.

Means for solving the problems

To achieve the above object, a washing and drying machine according to the present invention includes: a housing; an outer tub supported in the housing and storing washing water therein; a washing tub supported rotatably about a vertical axis in the outer tub and for storing laundry; a pulsator rotatably provided at a bottom of the tub; a drive unit operable in a drive manner including: a first driving method of rotating the pulsator in a state where the tub is stationary, and a second driving method of rotating the tub integrally with the pulsator; an air supply unit supplying air into the washing tub; a heating unit heating air supplied into the tub; a water supply unit supplying water into the tub; and a control unit for controlling the operation of the driving unit, the air supply unit, the heating unit and the water supply unit, wherein the control unit makes the driving unit operate in the first driving mode in a washing step or a rinsing step executed after the heating process of supplying the warm air into the washing tub is executed.

Effects of the invention

According to the present invention, when a washing such as a blanket sensitive to heat is heated to kill mites, mechanical force is applied to the washing in a washing step or a rinsing step performed after killing the mites, thereby effectively removing dead bodies of the mites.

Drawings

Fig. 1 is a vertical sectional view showing a structure of a washing and drying machine according to an embodiment of the present invention.

Fig. 2 is a functional configuration diagram of the washing and drying machine according to the embodiment of the present invention.

Fig. 3 is a basic control flowchart of the mite control program according to the embodiment of the present invention.

Fig. 4 is a basic control flowchart of a mite control program according to another embodiment of the present invention.

Fig. 5 is a control flowchart of the heating and humidifying process according to the embodiment of the present invention.

FIG. 6 is a temperature profile of a felt according to an embodiment of the present invention.

Fig. 7 is an explanatory diagram of an operation and a driving mode of the embodiment of the present invention.

Fig. 8 is a vertical sectional view showing a structure of a washing and drying machine according to another embodiment of the present invention.

Detailed Description

Hereinafter, a washing and drying machine according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are specific examples of the present invention, and the technical scope of the present invention is not limited thereto.

[ example 1 ]

Hereinafter, an embodiment of the present invention will be described with reference to fig. 1, 2, 3, 4, 5, 6, and 7.

Fig. 1 is a vertical sectional view showing a structure of a washing and drying machine according to an embodiment of the present invention, and fig. 2 is a functional configuration diagram of the washing and drying machine according to the embodiment of the present invention.

In the casing 1 of the washing and drying machine, the outer tub 2 for storing washing water is supported by 4 hanging members (not shown) hanging from four corners of the upper end of the casing 1 in a vibration-proof manner, and is disposed at the center portion in the casing 1 in the vertical direction. The washing tub 3 disposed in the outer tub 2 is formed in a bottomed cylindrical shape that is long in the axial direction using a stainless steel plate. A through hole 7 for water and air to pass through is formed in the peripheral wall of the washing tub 3.

A pulsator 6 for performing washing operation, rinsing operation, drying operation, and the like by agitating laundry is rotatably provided at the center of the inner bottom surface portion in the washing tub 3. The pulsator 6 is driven to rotate by a driving device 8, and repeats normal rotation and reverse rotation to perform washing operation, rinsing operation, drying operation, and the like. During the dehydration operation, the washing tub 3 and the pulsator 6 rotate at high speed integrally, thereby dehydrating the water contained in the laundry.

The drive device 8 incorporates a drive motor using a reversible-rotation single-phase capacitive split-phase induction motor, an inverter drive motor, and the like, an electromagnetically operated clutch unit, and a planetary gear reduction mechanism, and has a drive function of selectively implementing the following modes by controlling the drive motor and the electromagnetically operated clutch mechanism: a stirring drive mode (first drive mode) in which the pulsator 6 repeatedly rotates forward and backward (reciprocates) while the washing tub 3 is stationary; a dehydration drive mode (second drive mode) in which the washing tub 3 and the pulsator 6 are rotated integrally in the same direction; and a neutral drive mode (third drive mode) in which the washing tub 3 is rotated in the reverse direction by a backlash generated when the pulsator 6 is rotated without coupling the washing tub 3 and the pulsator 6.

A circulation duct 18 connected to the outer tub 2 through an exhaust connection part 24 is provided at a rear side portion in the casing 1, a water-cooling dehumidifying plate 20 for cooling warm air containing moisture evaporated from laundry in a drying step with cooling water to dehumidify the warm air is provided in an air passage of the circulation duct 18, and a lint filter (not shown) for removing lint contained in the circulating warm air is detachably provided. The warm air flow passes from the outer tub 2 through the exhaust connection part 24 and goes upward from below the circulation duct 18 as indicated by the arrows with black frames and white bottoms, and a blower 19 and a heater 17 for heating the cooled and dehumidified circulating warm air are provided in front of the flow. The air heated by the heater 17 supplies warm air to the wash tub 3 through the air supply duct 26. A mesh-like mist net 28 of a substantially hemispherical shape woven with fine metal wires is attached to a supply port for supplying warm air to the washing tub 3. Above the mist net 28, a mist nozzle 27 protrudes downward in the air supply duct 26. When the tap water is supplied from the water mist nozzle 27, the tap water sprayed downward from the water mist nozzle 27 hits the mist net 28, and the tap water is atomized (atomized) and spread into the washing tub 3.

The mesh of the mist net 28 is preferably larger than a water supply filter (not shown) provided inside the supply hose nipple 10. This prevents the mist net 28 from being clogged by garbage in the tap water. Further, by disposing the mist net 28 below the mist nozzle 27, the water sprayed from the mist nozzle 27 is accelerated by the acceleration of gravity and then hits the mist net 28, thereby promoting further miniaturization of the water.

A warm air temperature sensor 21 for detecting the temperature of the heated warm air is provided in the air blowing duct 26 to control the heating by the heater 17. In addition, a humidity sensor (not shown) for sensing the humidity of the circulating air is provided in the air passage.

The circulation duct 18 is provided with a circulation temperature sensor 22 for detecting the temperature of warm air discharged from the washing tub 3 and circulating through the circulation duct 18, and a discharge temperature sensor 23 for detecting the temperature of cooling water including condensed water condensed and collected by cooling is provided at a position where the cooling water flows in the exhaust connection portion 24.

During the washing operation, the water temperature of the washing water or the rinsing water is detected by the circulation temperature sensor 22 or the drain temperature sensor 23, and the detected water temperature can be used to change the control contents of the washing step or the rinsing step.

The control unit 9 is configured mainly by a microcomputer 37.

The microcomputer 37 has a function of controlling the display panel 16, the supply unit 11, and the water discharge valve 14. The motor 32 of the driving device 8 is driven and controlled by the motor driving circuit 31, the clutch mechanism 34 is switched by the clutch driving circuit 33, the heater 17 is controlled to be energized by controlling ON/OFF (ON/OFF) of the heater switch 35, and the fan 19 is controlled to be strong/weak/OFF by the fan zone circuit 36.

Fig. 3 is a basic control flowchart of the program for dealing with mites according to the embodiment of the present invention executed by the microcomputer 37 in the control unit 9.

Fig. 7 is an explanatory diagram of a driving mode in which the microcomputer 37 in the control unit 9 controls the clutch mechanism 34.

The microcomputer 37 executes the following control processing when a power switch (not shown) is turned on.

Step S01

After the power is turned on and the initialization process of the control processing system is performed, the clutch mechanism 34 is controlled to the position at the start of washing, and if the drain valve 14 is not closed, the closing control is performed.

Step S02

The washing tub 3, here, a blanket or a quilt is put in, a program selection button (not shown) of the operation switch 30 is operated to perform initial setting, and the operation control process is executed by pressing a start button switch. In the initial setting, a program for dealing with mites is selected and set as an embodiment of the present invention.

Step S03

The main water supply solenoid valve (not shown) of the water supply unit 11 is opened to start the supply of the city water. The washing water is supplied up to a set water amount, the clutch mechanism 34 is controlled to be in the dewatering position, and the washing tub 3 and the pulsator 6 are integrally rotated in the same direction at a low speed to quickly suck water into the blanket or the beddings.

Step S04

In a washing and drying machine having a washing tub 3 rotating about a vertical axis, tap water up to a set amount of water is supplied to dilute a detergent to a detergent concentration suitable for washing, and a blanket or bedding as a washing object is immersed in the detergent. In this state, the drive device 8 is controlled to selectively execute tub rotation washing in which the washing tub 3 and the pulsator 6 are integrally rotated by setting the clutch mechanism 34 to the dehydration drive mode, or tub pulsator washing in which the washing tub 3 is reversely rotated by reversing the pulsator 6 by setting the clutch mechanism 34 to the neutral drive mode.

The barrel rotates for washing, which is suitable for washing without damaging the blanket and the bedding, but the mechanical washing force applied to the blanket and the bedding is small.

The barrel impeller washing has the advantages of both barrel rotation washing and stirring washing, and can properly apply mechanical washing force without damaging blankets and bedding.

In a so-called drum washer-dryer having a washing tub 3 rotating about a horizontal axis or an inclined axis, tap water is not supplied until the washing tub 3 is soaked in a blanket or bedding as a laundry, and the washing tub 3 is rotated in a forward direction or a reverse direction to carry the blanket or bedding as the laundry to the top and drop the blanket or bedding.

Step S05

The drain valve 14 is opened and the washing liquid is discharged to the outside of the machine. In the washing drain operation, the clutch mechanism 34 is controlled to be in the spin-drying drive mode during or after the completion of the drain.

Step S06

After the completion of the drainage, the washing tub 3 and the pulsator 6 are rotated integrally in the same direction at high speed, thereby centrifugally dewatering the washing liquid contained in the blanket or bedding as the laundry.

Step S07

The drain valve 14 is closed, and the main water supply solenoid valve of the water supply unit 11 is opened to supply tap water up to a set water amount.

Step S08

The driving device 8 is controlled to perform the operation of the rinsing 1. The rinsing 1 operation may be skipped to shorten the operation time in some cases.

Step S09

The drain valve 14 is opened to discharge the rinse water to the outside of the machine. In the draining operation of the rinsing 1, the clutch mechanism 34 is controlled to be in the dewatering drive mode during the draining operation.

Step S10

The washing tub 3 and the pulsator 6 are integrally rotated in the same direction at high speed, thereby centrifugally dewatering rinse water contained in a blanket or bedding as laundry.

Step S11

The drain valve 14 is closed, and the control unit 9 controls the blower 19, the heater 17, and the drive device 8 to perform heating and humidification processing.

Specifically, as shown in the flowchart of fig. 5, the driving unit 8 is controlled to rotate the washing tub 3 at a low speed (step S501). Then, the control unit 9 controls the fan drive circuit 36 to operate the air blower 19 to supply air into the washing tub 3 (step S502).

Thereafter, the control unit 9 controls the heater switch 35 to be ON (ON) to forcibly operate the heater 17 (step S503). The blanket or bedding as the laundry is heated by the warm air temperature sensor 21 provided in the air supply duct 26 until the warm air temperature becomes 80 ℃ or higher (step S504). When the temperature of the warm air detected by the warm air temperature sensor 21 exceeds 80 ℃, the controller 9 controls the water supply unit 11 to intermittently supply tap water from the mist nozzle 27 (tap water S505).

The mist water supply solenoid valve (not shown) of the water supply unit 11 can supply 0.2 to 0.5L of tap water per minute to the mist nozzle 27, but in this embodiment, in order to prevent the fiber itself of the blanket or bedding as the laundry from being deformed and roughened by the wind due to heat, and to maintain the temperature necessary for killing the mites, the mist water supply solenoid valve is turned ON (ON) for 10 seconds, and then, the intermittent water supply is turned OFF (OFF) for 170 seconds. The ON/OFF time distribution is a control scheme, and is set according to each washing and drying machine, so that the temperature of the blanket or the bedding as the washing can be prevented from being excessively increased.

The water mist is intermittently dispersed by the circulation temperature sensor 22 provided in the circulation line 18, and the heating and humidification of the blanket or the beddings as the laundry are continued until the temperature of the warm air circulating in the circulation line 18 exceeds 50 ℃ (step S506).

If the circulation temperature detected by the circulation temperature sensor 22 exceeds 50 ℃, the controller 9 closes the water supply solenoid valve for mist of the water supply unit 11, stopping the intermittent dispersion of mist (step S507). Thereafter, the control unit 9 controls the heating switch 35 to make the heater 17 operate weakly (step S508). At the same time as the start of the weak operation of the heater 17, a weak operation timer is started (step S509), and the weak operation is continued for 30 minutes (step S510). This is a treatment for keeping the temperature of the blanket or bedding as the washing object at 50 ℃ or higher for 20 minutes in order to kill mites, and is a treatment for preventing the temperature of the lower part of the blanket or bedding as the washing object put into the washing tub 3 rotating around the vertical axis from increasing. In the case of a washing and drying machine having a washing tub 3 rotating about a horizontal axis or an inclined axis, since the position of a blanket or bedding as a washing article can be changed as the washing tub 3 rotates, a weak operation can be skipped. When the weak operation timer has elapsed for 30 minutes, the control unit 9 turns off the heater switch 35 to stop the heating of the heater 17 (step S511). The blower operation timer is started while the heating by the heater 17 is stopped (step S512). The blower 19 is operated until the blowing operation is performed for 15 minutes (step S513), and when the blowing operation has elapsed for 15 minutes, the control unit 9 controls the fan drive circuit 36 to stop the operation of the blower 19 (step S514).

After the air blowing operation is stopped, the control unit 9 controls the driving device 8 to stop the rotation of the washing tub 3 (step S515).

Step S12

The main water supply solenoid valve of the water supply unit 11 is opened to supply tap water up to a set water amount.

Step S13

The driving device 8 is controlled to perform the rinsing 2 operation.

In the rinsing 2 operation, in order to apply a mechanical force for removing the dead bodies of the killed mites to the blanket or bedding as the laundry, agitation washing in which the pulsator 6 is rotated forward/backward in a state where the washing tub 3 is stationary in the agitation drive mode by the clutch mechanism 34, or barrel pulsator washing in which the washing tub 3 is rotated backward by the reverse washing of the rotary pulsator 6 in the neutral drive mode by the clutch mechanism 34 is selectively performed.

Step S14

Similarly to step S09, the rinse water is discharged to the outside of the machine.

Step S15

Similarly to step S10, the rinse water contained in the blanket or bedding as the laundry is centrifugally dewatered. Hereinafter, steps S16, S17, and S18 are performed in the same manner, but may be omitted as the case may be.

Step S19

The blanket or bedding as the laundry is fully rinsed, and the final dewatering is fully centrifugally dewatered.

Fig. 4 is different in that the heating and humidifying process (step S11) is performed before the washing water supply (step S03), but the basic control is the same as the flowchart of fig. 3.

Fig. 6 is a simplified explanatory diagram of the temperature distribution of the felt, and the cooling effect of the heating and humidifying process will be explained using this diagram.

(a) The heating process is performed when the water is not intermittently supplied to the washing tub 3, and the heating and humidifying process is performed when the water is intermittently supplied.

The section tA is a section in which the heater 17 is in the strong operation, the section tB is a section in which the heater 17 is in the weak operation, and the section tC is a section in which the heater 17 is off and the air blowing operation is performed.

The temperature change indicated by the temperature change T1 is such that the temperature change at the point a exceeds 50 c in the upper surface of the part near the hot air supply part of the blanket or bedding as the laundry put into the washing tub 3 rotating about the vertical axis.

On the other hand, in the lower part of the washing tub 3, the heating time to the point B exceeding 50 ℃ is long as the temperature change is shown as temperature change T2. Therefore, in the temperature change T1, the temperature rises rapidly as the heating is continued from the point a and the moisture contained in the felt decreases, and the fiber of the felt is thermally deformed when the temperature reaches the maximum temperature at the point C.

When the heating and humidifying treatment of the present embodiment is performed, tap water (line M) is intermittently supplied from the mist nozzle 27 when the temperature of the warm air exceeds 80 ℃. This alleviates the temperature rise from the point a exceeding 50 ℃ on the upper surface of the portion near the supply of the warm air. In addition, in the temperature change T2, point B exceeds 50 ℃ in the lower portion of the washing tub 3, and thereafter the temperature also continues to rise. In the weak operation section tB of the heater 17, the temperature change T1 rises almost slowly and smoothly. In the heating and humidifying treatment of the present embodiment, the temperature does not exceed 60 ℃. On the other hand, in the temperature change T2, the temperature continues to rise even in the weak operation interval tB, and further, the temperature of the region tC of the blowing operation continues to rise slowly, and can be maintained at 50 ℃ or higher for 20 minutes or longer.

According to the present embodiment, the temperature of the laundry can be prevented from excessively rising by appropriately cooling and humidifying the laundry, and the efficiency of killing mites can be improved because the temperature can be maintained at a constant temperature.

Further, by using mist in the cooling treatment, a rapid decrease in temperature can be suppressed, and temperature control can be performed more appropriately.

[ example 2 ]

Fig. 8 is a vertical sectional view showing the structure of a washing and drying machine according to another embodiment of the present invention, and the heat treatment in example 2 is different from that in example 1 as follows: a water supply heater 38 is provided in a pipe for supplying water from a water supply unit 11 to the washing tub 3 without supplying warm air into the washing tub 3, and heated water is supplied into the washing tub 3 to keep a blanket or bedding as washing articles at 50 ℃ or higher for 20 minutes, thereby effectively killing mites.

Instead of supplying water while heating water, a heater (not shown) for heating water is provided between the outer tub 2 and the washing tub 3 to heat the supplied water, so that the blanket or bedding as the laundry can be maintained at 50 ℃ or higher for 20 minutes.

In addition, in the so-called vertical washing and drying machine, since the amount of water used for washing the blanket or the beddings as the laundry is large, the time for heating the water is long and the electric power consumed is large, it is more effective that the blanket or the beddings as the laundry are in a dry state or heated by warm wind after moisture contained therein is removed.

Description of the reference numerals

1 outer cover (casing)

2 outer barrel

3 washing tub

6 wave wheel

8 drive device (drive part)

9 control part

17 Heater (heating unit)

19 blower (blowing supply unit)

20 Water-cooling dehumidifying board (Water-cooling dehumidifying unit)

21 warm air temperature sensor

22-cycle temperature sensor

27 mist nozzle (mist spreading unit)

28 mist net (fine-sized member, mist scattering means).

Claims

1. A washer-dryer, characterized by comprising:

a housing;

an outer tub supported in the housing and storing washing water therein;

a washing tub supported rotatably about a vertical axis in the outer tub and for storing laundry;

a pulsator rotatably provided at a bottom of the tub;

a circulation pipeline arranged in the shell and connected with the outer barrel;

a drive unit operable in a drive manner including: a first driving method of rotating the pulsator in a state where the tub is stationary, and a second driving method of rotating the tub integrally with the pulsator;

an air supply unit supplying air into the washing tub;

a heating unit heating air supplied into the tub;

a water supply unit supplying water into the tub; and

a control unit for controlling the action of the driving unit, the air supply unit, the heating unit and the water supply unit,

the control unit operates the driving unit in the first driving mode in a washing step or a rinsing step performed after heating and humidifying treatment of supplying warm air and intermittently supplying mist into the washing tub is performed,

wherein, in the heating and humidifying treatment, the control unit controls the water supply unit to intermittently supply the water mist when the temperature of the warm air exceeds 80 ℃,

when the temperature of the warm air circulating in the circulation line exceeds 50 ℃, the control unit controls the water supply unit to stop the intermittent dispersion of the water mist.

2. A washer-dryer, characterized by comprising:

a housing;

an outer tub supported in the housing and storing washing water therein;

a pulsator rotatably provided at a bottom of the tub;

a drive unit operable in a drive manner including: a first drive method of rotating the pulsator in a state where the washing tub is stationary, a second drive method of rotating the washing tub integrally with the pulsator, and a third drive method of rotationally driving the pulsator in a state where the washing tub is rotatable and a reaction force of the pulsator drive can be applied to the washing tub;

an air supply unit supplying air into the washing tub;

a heating unit heating air supplied into the tub;

a water supply unit supplying water into the tub; and

the control unit may cause the driving unit to operate in the third driving manner in a washing step or a rinsing step performed after the heating and humidifying process of supplying warm air and intermittently supplying mist into the washing tub is performed,

3. The washer dryer as claimed in claim 1 or 2, wherein:

and a step of operating the driving unit in the second driving manner in a washing step or a rinsing step performed before the heating and humidifying treatment.