WO2020031581A1

WO2020031581A1 - Washing machine

Info

Publication number: WO2020031581A1
Application number: PCT/JP2019/026867
Authority: WO
Inventors: 智亮米田; 堀部　泰之
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2018-08-08
Filing date: 2019-07-05
Publication date: 2020-02-13
Also published as: CN112189065A; JP2020022647A; TW202012730A; JP7329723B2

Abstract

A washing machine according to the present invention is provided with: a washing drum; a temperature detecting unit for detecting a washing water temperature; and a control unit for executing a washing process including a light washing process, and a main washing process in which a washing mechanical force imparted to items to be cleaned is larger than in the light washing process, and which promotes cleaning. The control unit modifies the duration of the light washing process on the basis of the washing water temperature detected by the temperature detecting unit, and performs control in such a way that the cumulative value of the washing mechanical force in the light washing process is constant irrespective of the duration of the light washing process.

Description

Washing machine

The present invention relates to a washing machine that performs washing of clothes and the like.

In the conventional washing machine, in the washing process, the stirring time is set at a plurality of stages according to the temperature range according to the temperature of the washing water supplied by the water supply unit and the amount of cloth put into the washing tub (for example, Patent Document 1). When the temperature of the washing water in the washing tub is equal to or lower than the predetermined temperature, the washing machine energizes the hot water heater to increase the temperature of the washing water. When the temperature of the washing water exceeds the predetermined temperature, the washing machine stops energizing the hot water heater. A plurality of stages of stirring time are set in advance according to the washing water temperature, and the washing machine performs stirring for the set time according to the washing water temperature.

JP 2012-170687 A

However, in the above-described conventional configuration, when the washing water temperature is low, the washing tub is rotated while the washing water is heated by the hot water heater. In this configuration, the lower the temperature of the washing water, the longer it takes to raise the washing water to a predetermined temperature. Therefore, when the delicate clothes are washed with a long stirring time, the rotation of the washing tub may increase the mechanical force applied to the clothes and damage the cloth.

The present invention keeps the washing machine force applied to the clothes constant regardless of the condition of the washing water temperature (that is, fixes the washing machine force applied to the clothes to a predetermined value), thereby suppressing damage to the cloth of the clothes and increasing the washing machine force. An object of the present invention is to provide a washing machine capable of achieving a washing effect.

The washing machine according to the present invention includes a washing tub, a temperature detecting unit for detecting a temperature of washing water, a weak washing step, and a main washing operation in which a washing machine power received by the object to be washed is greater than that in the weak washing step, thereby facilitating washing. And a control unit for executing a washing step including the steps. The control unit changes the time of the weak washing step based on the washing water temperature detected by the temperature detection unit, and regardless of the length of the time of the weak washing step, the washing in the weak washing step. Control is performed so that the cumulative value of the mechanical force is constant.

The washing machine of the present invention can realize stable washing machine power regardless of washing conditions.

Schematic configuration diagram of a drum-type washing machine according to a first embodiment of the present invention. Functional block diagram of the drum type washing machine Flowchart of the fashionable washing course of the drum type washing machine Time chart of the agitation of the drum type washing machine Time chart of the washing process of the drum type washing machine

The washing machine according to the first aspect has a washing tub, a temperature detecting unit for detecting a temperature of washing water, a weak washing step, and a washing machine power received by the object to be washed is greater than that in the weak washing step, thereby facilitating washing. And a control unit for executing a washing step including a main washing step. The control unit changes the time of the weak washing step based on the washing water temperature detected by the temperature detection unit, and regardless of the length of the time of the weak washing step, the washing in the weak washing step. Control is performed so that the cumulative value of the mechanical force is constant. Here, the term “constant” includes not only a completely constant case but also a substantially constant case.

This makes it possible to realize stable washing machine power regardless of washing conditions.

The washing machine according to a second aspect further includes a cloth amount detection unit that detects a cloth amount of the object to be washed, and the control unit is configured to perform the operation based on the amount of the object to be washed and the temperature of the washing water. The time of the weak washing step is changed.

In the washing machine according to a third aspect, the weak washing step includes a swing stirring step of swinging the washing tub in a forward direction and a reverse direction, and the time of the loose stirring step is shorter than the time of the weak washing step. To change.

In the washing machine according to the fourth aspect, the control unit executes the weak washing step before the main washing step.

Thus, a high cleaning effect can be realized.

The washing machine according to the fifth aspect further includes a heating unit that heats the washing water, and the control unit controls the heating unit to heat the washing water in the weak washing step.

Thus, a high cleaning effect can be realized.

In the washing machine according to the sixth aspect, when the temperature of the washing water in the weak washing step is equal to or higher than a predetermined temperature, the control unit shifts from the weak washing step to the main washing step.

Thus, a high cleaning effect can be realized.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited by the embodiment.

(Embodiment 1)
FIG. 1 is a schematic configuration diagram of a drum-type washing machine according to a first embodiment of the present invention. FIG. 2 is a functional block diagram of the drum type washing machine.

1 and 2, in the housing 1, the water tank 3 is elastically supported by the damper 2 and the like. A cylindrical drum 4 with a bottom is rotatably provided in the water tank 3. The rotating shaft 4a of the drum 4 is supported so as to be inclined upward at an angle θ with respect to a horizontal plane. In the present embodiment, the angle θ is set to, for example, 5 to 20 degrees. A hot water heater 18 for heating the washing water is arranged at the bottom of the water tub 3.

(4) An openable / closable door 27 is provided on the front surface of the housing 1, and the user can put clothes in and out of the opening 7 provided on the front surface side of the drum 4 by opening the door 27.

A plurality of baffles 5 protruding inward toward the rotation center of the drum 4 and a number of small holes 6 communicating with the inside of the water tank 3 are provided on the peripheral side surface of the drum 4. On the front side of the drum 4, an opening 7 for taking in and out laundry such as clothes (hereinafter referred to as clothes) is provided. Around the opening 7, a balancer 8 is formed in an annular shape so as to surround the opening 7. The balancer 8 reduces vibrations generated when the drum 4 rotates due to the unevenness of clothes.

モータ A motor 9 for rotating and driving the drum 4 is provided on the rear surface of the water tank 3. The motor 9 is configured by a brushless DC motor, and can freely change the rotation speed by inverter control. The motor 9 may be connected to the drum 4 via a belt.

給 The water supply valve 10 serving as a water supply section is provided in the water supply pipe 11. The washing water supplied from the water supply valve 10 passes through a water supply path 13 via a detergent case 12 provided in a water supply pipe 11 and into which a detergent is charged. Then, the washing water is supplied from the water supply port 14 into the water tub 3. The washing water supplied into the water tub 3 flows into the drum 4 from the small holes 6.

排水 A drain port 17 is provided at the bottom of the water tank 3. A drain path 16 is connected to the drain port 17. The drainage path 16 is provided with a drainage valve 15 which is a drainage part. The washing water in the water tub 3 is discharged to the outside of the machine through a drain passage 16 by a drain valve 15.

During the washing step, the drain valve 15 is closed, and the circulation path 20 and the drain path 16 communicate with each other via the circulation pump 19. Then, the circulation pump 19 is operated, and the washing water is discharged from the discharge port 21 into the drum 4. The plurality of discharge ports 21 are formed in the circumferential direction of the water tank 3.

A control unit 22 is provided in the housing 1, and drives the motor 9, the water supply valve 10, the drain valve 15, the circulation pump 19, the hot water heater 18, and the like to perform each process such as washing, rinsing, and dehydration. Control sequentially.

The control unit 22 includes an output of a cloth amount detection unit 23 for detecting an amount of clothes put into the drum 4, an output of a water level detection unit 24 for detecting an amount of washing water supplied to the water tub 3, and The output of the rotation detecting unit 25 for detecting the driving of the drum 4 and the output of the water temperature detecting unit 26 for detecting the temperature of the washing water supplied into the water tub 3 are input.

In the present embodiment, the water temperature detection unit 26 is configured by a thermistor, and is provided near the drain port 17 provided at the bottom of the water tank 3. The water temperature detector 26 detects the temperature of the washing water supplied at the start of the washing process, and outputs the temperature of the washing water to the controller 22 as an electric signal.

制御 Control of the fashionable dressing washing course in the drum type washing machine configured as described above will be described below. The fashionable clothes washing course can realize a high washing effect by suppressing damage to the clothes regardless of washing conditions.

FIG. 3 is a flowchart of the fashionable dressing cleaning course according to the embodiment of the present invention, in which the washing process is mainly described. FIG. 4 is a time chart of the rotary agitation of the drum type washing machine, FIG. 5 (a) is a time chart of a washing step of the drum type washing machine, and FIG. 5 (b) is another time chart of the washing step. It is a time chart.

3. In FIG. 3, first, the user puts clothes into the drum 4, and the flowchart starts (step S1). The cloth amount in the drum 4 is detected by the cloth amount detection unit 23 (step S2), and a water level corresponding to the cloth amount, a detergent amount with respect to the water level, and a remaining washing time are displayed on the operation display unit 28. (Step S3).

When the displayed detergent amount is introduced into the detergent case 12 (step S4), the water supply valve 10 is operated to start water supply, and tap water is supplied into the water tank 3 together with the detergent in the detergent case 12 (step S5). ).

In step S5, the temperature of the tap water supplied by the water temperature detector 26 is detected. The control unit 22 sets the operation time of the weak washing process based on the amount of water according to the cloth amount detected in step S2 and the temperature of tap water. The larger the amount of cloth, the more washing water is supplied, and it takes time to raise the temperature of the washing water to a predetermined temperature. For this reason, the operation time of the weak washing step is set to be longer as the cloth amount is larger, and to be shorter as the cloth amount is smaller. Further, when the temperature of the tap water is low, it takes time to raise the temperature of the wash water to a predetermined temperature. Therefore, the operation time of the weak washing step is longer as the temperature of the tap water is lower, and the temperature of the tap water is higher. It is set as short as possible. As described above, the operation time of the weak washing step may be determined by a combination of both the amount of cloth and the temperature of tap water.

In this embodiment, the operation time of the weak washing step is set by the amount of water and the temperature of tap water in accordance with the amount of cloth. However, the present invention is not limited to this, and the temperature in the tank is detected by the water temperature detection unit 26 before water supply, and the operation time of the weak washing step is set by the temperature in the tank, the amount of water according to the amount of cloth, and the temperature of tap water. You may. In this configuration, if the temperature of the tub is low, it takes a long time to raise the temperature of the washing water to the predetermined temperature. On the other hand, the higher the temperature in the tank, the shorter the operation time of the weak washing step is set. As described above, the operation time of the weak washing step is determined by the combination of the amount of water and the temperature of tap water according to the tank temperature and the cloth amount.

In the water supply step, foam washing in which the drum 4 rotates at a low speed is performed to improve the balance of the laundry in the drum 4 and promote the dissolution of the detergent (step S6). Thereafter, water is supplied to compensate for the lowered water level due to the permeation of the washing water into the laundry (step S7). At the same time, the circulation pump 19 is intermittently driven, and the washing water in the water tub 3 is ejected from the discharge port 21 of the water tub 3 toward the laundry in the drum 4 as circulation water. The circulation pump 19 is appropriately driven in the washing step and the rinsing step. When the predetermined amount of water has been supplied, the process proceeds to the weak washing step (step S8).

In the weak washing step (Step S8), when the water reaches a predetermined water level set to turn on the hot water heater 18, the control unit 22 turns on the hot water heater 18. In the weak washing step, rocking agitation for swinging the drum 4 at an angle of less than 150 degrees (including substantially less than 150 degrees) is performed. The tumble stirring for rotating the drum 4 one or more times intermittently may be performed in the weak washing step.

Here, the tumble agitation is performed at such a speed that the clothes do not stick to the inner wall of the drum 4. That is, by rotating the drum 4, the clothes are lifted by the baffle 5, and the washing is performed at a rotation speed at which the clothes are dropped from the upper part to the lower part and the tapping is performed.

The rocking agitation is the agitation in which the drum 4 is swung at an angle such that the clothes are not hit and washed, and in the present embodiment, the control unit 22 sets the drum 4 to an angle of less than 150 degrees (including substantially less than 150 degrees). To rock.

FIG. 4 is a time chart showing an example of the agitation according to the present embodiment. As illustrated in FIG. 4, the control unit 22 stops the motor 9 by rotating the drum 4 to one side (time a in the figure), and moves to a position where the garment becomes a lower position due to its own weight of the eccentric load. The drum 4 is rotated. After a lapse of a predetermined time (time b in the figure), the control unit 22 rotates the drum 4 in the reverse direction (time a in the figure) to stop the motor 9, and causes the clothes to move downward due to the weight of the clothes that have become unevenly loaded. The drum 4 is rotated to a position where the drum 4 becomes a position. That is, the rocking agitation is a process of swinging the drum 4 in the forward and reverse directions.

Yuri-stirring is an operation that repeats this operation. By swinging the drum 4, the clothes can be massaged and washed with the washing water hitting the clothes. Thereby, the washing machine force applied to the clothes can be reduced.

In the present embodiment, the swing time “a” of the drum 4 and the number of times the drum 4 swings in FIG. 4 are constant irrespective of the length of the weak washing step. That is, the control unit 22 does not change (do not increase or increase) the swing time a and the number of times of swing regardless of the length of the operation time of the weak washing process. Here, the term “constant” includes not only a completely constant case but also a substantially constant case.

静止 The rest time b in FIG. 4 is changed by the operation time of the weak washing step which is set according to the amount of cloth and the temperature of tap water. That is, when the operation time of the weak washing step is long, the control unit 22 sets the rest time b longer according to the operation time. When the operation time of the weak washing step is short, the control unit 22 sets the rest time b to be short according to the operation time.

Thereby, the number of times the drum 4 is rocked is constant irrespective of the length of the operation time of the light washing process, so that the cumulative value of the washing machine power applied to the clothes in the light washing process becomes constant (ie, The cumulative value of the washing machine power applied to the clothes in the weak washing step can be fixed to a predetermined value). Thereby, the damage to the clothing can be made constant.

(A) of FIG. 5 is a time chart showing an example of the washing step of the present embodiment, and shows a washing step in which only loose stirring is performed in the weak washing step. Since only the loose stirring is performed, the washing machine power for the clothes can be reduced, and damage to the clothes can be suppressed. The garment is in a massage-washing state, and the washing machine power applied to the garment can be made substantially constant regardless of the length of operation time in the washing process. Thereby, the damage to the clothing can be made constant. In the present embodiment, the washing step includes a detergent dissolving step, a weak washing step, and a main washing step. As described above, the weak washing step is a step in which the washing machine power is suppressed, and the main washing step is a step for accelerating the washing. The washing machine power of the main washing step is larger than the washing machine power of the weak washing step.

（(B) of FIG. 5 is a time chart showing another example of the washing step of the present embodiment, and shows a washing step in which tumble stirring is performed in the first half of the weak washing step and loose stirring is performed in the second half. In the weak washing step of the present embodiment, the time in the first half of the tumble stirring is fixed, and the length of the washing step is adjusted by the length of the latter half of the weak washing step. By performing tumble agitation in the first half of the weak washing step, the solubility of the detergent can be improved, and the permeability of the detergent component into clothing can be increased, thereby improving the washing performance. In this washing step, tumble stirring is performed in the first half of the weak washing step. Since tumble stirring is performed a small number of times, damage to clothing can be suppressed. Also in this washing step, the accumulated value of the washing machine force applied to the clothes is fixed regardless of the length of operation time of the washing step (that is, the accumulated value of the washing machine force applied to the clothes is fixed to a predetermined value). And the damage to clothing can be made constant.

タイム The time charts shown in FIGS. 5A and 5B show an example of the washing step of the present embodiment, and do not limit the present invention.

洗濯 Here, the washing machine force means the mechanical and physical acting force that the clothes receive during washing. Specifically, the washing machine power refers to the washing machine power specified in JIS L1930 based on the pictorial indication of the handling of the clothes targeted for the fashionable clothes washing course of the present embodiment. The predetermined value of the washing machine force indicates, for example, the mechanical force defined in the handling picture display.

In this embodiment shown in FIG. 5A, the number of times the drum 4 is rocked and the rotation time a are set to be constant regardless of the length of the operation time. The length of the operation time may be changed while the stationary time b is fixed. Even with this configuration, the clothes are rubbed and washed with the washing water by the swing of the drum 4, so that the mechanical force on the clothes is reduced, and the pain of the clothes can be suppressed. Further, when the operation time becomes longer, both the number of times the drum 4 is rocked and the stationary time b may be increased. Even with this configuration, a similar effect is achieved.

Alternatively, the circulation pump 19 may be intermittently driven while the drum 4 is stopped, instead of the agitation. In this configuration, since the clothes are rubbed and washed by the circulating washing water, the washing machine force on the clothes is reduced and the pain of the clothes can be suppressed as in the case of the loose stirring. A configuration in which the agitation and the driving of the circulation pump 19 are combined may be adopted.

Also in these washing steps, the accumulated value of the washing machine force applied to the clothes can be made substantially constant regardless of the length of operation time of the weak washing step, and the damage to the clothes can be made constant.

(4) When the water temperature detecting section 26 detects that the temperature of the washing water has become equal to or higher than the predetermined temperature (step S10), the process proceeds to the main washing step (step S11). In the present embodiment, the predetermined temperature is set to 37 ° C. For example, sebum melts at 90% at about 37 ° C to become a liquid, and at about 37 ° C detergent enzymes are activated. For this reason, by shifting from the weak washing step to the main washing step at about 37 ° C., a high washing effect can be expected by suppressing the washing machine power.

In the main washing step (step S11), the sebum is intermittently tumble-mixed when the sebum is effectively removed easily by the effect of the warm water. When the temperature of the washing water reaches about 40 ° C., the control unit 22 intermittently turns on the hot water heater and maintains the temperature at about 40 ° C. (step S12).

制御 After a predetermined time has passed through the main washing step (step S11), the control unit 22 ends the washing step.

す Rinsing of the next step In the step (1) (step S13), the drain valve 15 is opened, and after the water in the water tank 3 is drained, intermediate dewatering is performed. After water is separated from the laundry by applying centrifugal force to the laundry, water is supplied, the motor 9 is driven, and rinsing and stirring for discharging the washing liquid from the laundry is started.

(4) After performing rinsing and stirring for a predetermined time, the control unit 22 drains the water in the water tank 3, performs dehydration, and ends the rinsing (1) step.

In the rinsing (2) step (step S14), that is, in the final rinsing step, drainage and intermediate dehydration are performed in the same manner as in the rinsing (1) step, and after these, rinsing and stirring are started.

(4) After the rinsing (2) step (Step S14) is completed, the control unit 22 proceeds to the dehydration step (Step S15).

In the dewatering step (step S15), after the rinsing (2) step is completed, the drain valve 15 is opened, and the water in the water tank 3 is drained. Thereafter, the control unit 22 drives the motor 9 to rotate the drum 4 at a high speed, apply centrifugal force to the laundry, and separate moisture from the laundry for a predetermined time, and the fashionable dressing cleaning course ends. .

が Although the above-described embodiment has been described based on the drum type washing machine, it may be applied to a vertical washing machine. In a vertical washing machine, when performing a fashionable dressing washing course, pickling washing is performed instead of the agitation, or pass washing is performed by rotating the washing tub in one direction at a high speed. In addition, it is also possible to adopt a structure in which the reverse of the washing tub is reversed instead of the tumble stirring.

Also, although a heater is used as the heating unit for the washing water, another heating unit such as an IH may be used instead of the heater.

As described above, the washing machine according to the present invention can suppress the washing machine power within a predetermined range and realize stable washing regardless of washing conditions such as washing water temperature and laundry amount. The present invention can also be applied to other uses such as a washing machine having a fashionable course and a soaking course.

DESCRIPTION OF SYMBOLS 1 Case 2 Damper 3 Water tank 4 Drum 5 Baffle 6 Small hole 7 Opening 8 Balancer 9 Motor 10 Water supply valve (water supply part)
11 water supply pipe 12 detergent case 13 water supply path 14 water supply port 15 drain valve (drain part)
Reference Signs List 16 drainage path 17 drainage port 18 hot water heater 19 circulation pump 20 circulation path 21 discharge port 22 control unit 23 cloth amount detection unit 26 water temperature detection unit

Claims

A washing tub,
A temperature detector for detecting the temperature of the washing water;
A weak washing step, and a control unit that performs a washing step including a main washing step in which a washing machine force received by the object to be washed is greater than the weak washing step and promotes washing,
The control unit includes:
While changing the time of the weak washing step based on the washing water temperature detected by the temperature detection unit,
A washing machine that controls the accumulated value of the washing machine power in the weak washing step to be constant regardless of the length of the time in the weak washing step.
The apparatus further includes a cloth amount detection unit that detects a cloth amount of the object to be cleaned,
The washing machine according to claim 1, wherein the control unit changes the time of the weak washing step based on the amount of the cloth to be washed and the temperature of the washing water.
3. The method according to claim 1, wherein the weak washing step includes a swing stirring step of swinging the washing tub in a forward direction and a reverse direction, and changing the time of the weak washing step according to a length of the swing stirring step. The washing machine as described.
The washing machine according to claim 1, wherein the control unit executes the weak washing step before the main washing step.
Further comprising a heating unit for heating the washing water,
The washing machine according to claim 3, wherein the control unit controls the heating unit to heat the washing water in the weak washing step.
6. The washing machine according to claim 5, wherein when the temperature of the washing water in the weak washing step is equal to or higher than a predetermined temperature, the control unit controls to shift from the weak washing step to the main washing step. 7.