TW202012730A - washing machine - Google Patents

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

Field of invention The invention relates to a washing machine for soaking and washing clothes and the like.

Background of the invention In Japanese Patent Laid-Open No. 2012-170687, there has been a method of setting agitation for a plurality of stages according to the temperature range in accordance with the temperature of the washing water supplied by the water supply unit or the amount of cloth put into the washing tank in the washing process Time washer was presented. When the temperature of the washing water in the washing tank is below a predetermined temperature, the washing machine energizes the warm water heater to increase the temperature of the washing water. After the temperature of the washing water exceeds the predetermined temperature, the washing machine will stop energizing the warm water heater. In accordance with the temperature of the washing water, a plurality of stages of stirring time are set in advance, and the washing machine will stir according to the time set according to the temperature of the washing water.

Summary of the invention However, in the above-mentioned conventional structure, when the temperature of the washing water is low, the washing tank is rotated by heating the washing water with a warm water heater. In this configuration, the lower the temperature of the washing water, the more time it takes for the washing water to rise to a predetermined temperature. Therefore, the stirring time becomes longer, and when washing delicate clothes, the mechanical force applied to the clothes due to the rotation of the washing tub increases, which may cause damage to the fabric.

The object of the present invention is to provide a method for setting the washing mechanical force applied to clothes to be constant regardless of the temperature of the washing water (that is, fixing the washing mechanical force applied to clothes to a predetermined value), thereby suppressing the clothes The fabric is damaged, and the washing machine can achieve a high washing effect.

The washing machine of the present invention is provided with: a washing tank; a temperature detection part to detect the temperature of the washing water; and a control part to perform a washing process. The aforementioned washing process includes: a weak washing process; and a formal washing process to be washed The mechanical strength of the washing that the object is subjected to is greater than the aforementioned weak washing process, which will promote washing. The control unit changes the time of the weak cleaning process according to the temperature of the washing water detected by the temperature detection unit, and controls so that regardless of the length of the time of the weak cleaning process, the The cumulative value of the washing mechanical force becomes constant.

The washing machine of the present invention can achieve stable washing mechanical force regardless of washing conditions.

Forms for carrying out the invention The washing machine according to the first aspect includes: a washing tank; a temperature detection part for detecting the temperature of the washing water; and a control part for performing a washing process. The aforementioned washing process includes: a weak washing process; and a formal washing process, The washing mechanical force on the washings is greater than the aforementioned weak washing process, which will promote washing. The control unit changes the time of the weak cleaning process according to the temperature of the washing water detected by the temperature detection unit, and controls so that regardless of the length of the time of the weak cleaning process, the The cumulative value of the washing mechanical force becomes constant. Here, the term "constant" includes not only a completely constant case, but also a substantially constant case.

Thereby, regardless of the washing conditions, a stable washing mechanical force can be achieved.

The washing machine in the second aspect further includes: a cloth amount detection unit for detecting the cloth amount of the laundry, and the control unit is based on the cloth amount of the laundry and the temperature of the washing water The aforementioned time of the aforementioned weak cleaning step is changed.

Thereby, regardless of the washing conditions, a stable washing mechanical force can be achieved.

In the washing machine according to the third aspect, the weak washing step includes a shaking stirring step that swings the washing tub in the forward direction and the opposite direction, and the time of the weak washing step is changed according to the length of the shaking stirring step.

Thereby, regardless of the washing conditions, a stable washing mechanical force can be achieved.

In the washing machine of the fourth aspect, the control unit executes the weak cleaning process before the main cleaning process.

With this, a high washing effect can be achieved.

The washing machine of the fifth aspect further includes a heating unit for heating the washing water, and the control unit controls the heating unit to heat the washing water in the weak washing process.

With this, a high washing effect can be achieved.

In the washing machine according to the sixth aspect, after the temperature of the washing water in the weak cleaning step becomes equal to or higher than a predetermined temperature, the control section shifts from the weak cleaning step to the main cleaning step.

With this, a high washing effect can be achieved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the present invention is not limited by this embodiment. (Embodiment 1)

FIG. 1 is a schematic configuration diagram of a drum-type washing machine in a first embodiment of the present invention. 2 is a functional block diagram of the same drum-type washing machine.

In FIGS. 1 and 2, the water tank 3 is elastically supported in the housing 1 by a damper 2 or 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 at an angle with respect to the horizontal plane at an angle θ in front and back. In this embodiment, the angle θ is set to 5 to 20 degrees, for example. At the bottom of the water tank 3, a warm water heater 18 for heating wash water is arranged.

A door 27 that can be opened and closed freely is provided in front of the housing 1, and when the user opens the door 27, the clothes can be taken out and put in through the opening 7 provided on the front side of the drum 4.

A plurality of baffles 5 and a plurality of small holes 6 are provided on the peripheral side of the drum 4, the plurality of baffles 5 protrude inward toward the center of rotation of the drum 4, and the plurality of small holes 6 are connected to the water tank Connected within 3. An opening 7 is provided on the front surface side of the drum 4 to take in and put out laundry (hereinafter referred to as laundry). Around the opening 7, a balancer 8 is formed annularly to surround the opening 7. The balancer 8 reduces the vibration caused by the shift of the laundry when the drum 4 rotates.

A motor 9 that rotationally drives the drum 4 is arranged behind the water tank 3. The motor 9 is constituted by a brushless dc motor, and the rotation speed can be freely changed by inverter control. In addition, the motor 9 may be connected to the drum 4 via a belt.

The water supply valve 10 that is a water supply unit is provided in the water supply pipe 11. The washing water supplied from the water supply valve 10 passes through the water supply path 13 through the detergent box 12 provided in the water supply pipe 11 for inputting the detergent. Then, the washing water is supplied into the water tank 3 from the water supply port 14. The washing water supplied into the water tank 3 flows into the drum 4 from the small hole 6.

A drain 17 is provided at the bottom of the water tank 3. A drainage path 16 is connected to the drainage port 17. The drain path 16 is provided with a drain valve 15 as a drain portion. The washing water in the water tank 3 is discharged to the outside of the machine through the drainage path 16 through the drainage valve 15.

During the cleaning process, the drain valve 15 is closed, and the drain path 16 communicates with the circulation path 20 via the circulation pump 19. Then, the circulation pump 19 is activated, and the washing water is discharged from the discharge port 21 into the drum 4. A plurality of discharge ports 21 are formed in the circumferential direction of the water tank 3.

The control unit 22 is provided in the housing 1, and the control unit 22 drives: the motor 9, the water supply valve 10, the drain valve 15, the circulation pump 19, and the warm water heater 18, etc., and sequentially controls cleaning, rinsing, dehydration, etc. Each process.

In the control part 22, it will be input: the output of the cloth amount detection part 23 which detects the amount of laundry put into the drum 4, the output of the water level detection part 24 which detects the amount of washing water supplied to the water tank 3 1. The output of the rotation detection unit 25 that detects the driving of the drum 4, and the output of the water temperature detection unit 26 that detects the temperature of the washing water supplied to the water tank 3.

In this embodiment, the water temperature detection unit 26 is constituted by a thermistor, and is provided near the drain 17 provided at the bottom of the water tank 3. The water temperature detection unit 26 detects the temperature of the washing water supplied at the beginning of the washing process, and outputs the temperature of the washing water as an electrical signal to the control unit 22.

The control of the washing cycle of fashionable clothes in the drum-type washing machine configured as above will be described below. Regardless of the washing conditions, the washing schedule of fashionable clothes can suppress the fabric damage of clothes, thereby achieving a high washing effect.

FIG. 3 is a flowchart of a washing course of fashion clothes in an embodiment of the present invention, and is a diagram mainly described in a washing process. FIG. 4 is a time chart of shaking and stirring of the same drum-type washing machine, FIG. 5(a) is a time chart of the washing process of the same drum-type washing machine, and FIG. 5(b) is another time chart of the same washing process.

In FIG. 3, first, the user puts the laundry into the drum 4, thereby starting the flowchart (step S1). The cloth amount detection section 23 detects the cloth amount in the drum 4 (step S2), and displays on the operation display section 28: the water level corresponding to the cloth amount, the washing amount for the water level of the water level, and the remaining washing time (step S3) ).

When the displayed amount of detergent is put into the detergent box 12 (step S4), the water supply valve 10 will operate to start water supply, and tap water will be supplied into the water tank 3 together with the detergent in the detergent box 12 (step S5) .

In step S5, the temperature of the tap water supplied by the water temperature detection unit 26 is detected. The control unit 22 sets the operation time of the weak cleaning process by the water amount corresponding to the cloth amount detected in step S2 and the temperature of the tap water. The greater the amount of cloth, the more wash water is supplied, and the more time it takes for the temperature of the wash water to rise to a predetermined temperature. Therefore, the operation time of the weak cleaning step is set to be longer as the amount of cloth increases, and shorter as the amount of cloth decreases. Also, if the temperature of the tap water is low, it will take time to increase the temperature of the washing water to a predetermined temperature, so the operation time of the weak cleaning process is set to be lower as the temperature of the tap water is longer, and the higher the temperature of the tap water, the more short. In this way, the operation time of the weak cleaning step can be determined by the combination of both the amount of cloth and the temperature of the tap water.

In this embodiment, the operation time of the weak cleaning step is set by the amount of water corresponding to the amount of cloth and the temperature of the tap water. However, it is not limited to this, and the temperature in the tank may be detected by the water temperature detection unit 26 before the water is supplied, and the weak cleaning process may be set by the temperature in the tank, the amount of water corresponding to the cloth amount, and the temperature of the tap water Run time. In this configuration, if the temperature in the tank is low, it takes time to raise the temperature of the washing water to a predetermined temperature. Therefore, the operating time of the weak cleaning process is that the lower the temperature in the tank, the longer it becomes. On the other hand, the higher the temperature in the tank, the shorter the operation time of the weak cleaning process. In this way, the operation time of the weak cleaning step is determined by the combination of the temperature in the tank, the amount of water corresponding to the amount of cloth, and the temperature of the tap water.

In the water supply process, in order to improve the balance of the laundry in the drum 4 and promote the dissolution of the detergent, foam washing of the drum 4 rotating at a low speed is performed (step S6). Then, water supply is performed to make up the water level that the washing water penetrates the laundry to reduce (step S7). At the same time, the circulation pump 19 is driven intermittently, and the washing water in the water tank 3 is used as the circulating water to be sprayed from the discharge port 21 of the water tank 3 toward the laundry in the drum 4. The circulation pump 19 is appropriately driven during the cleaning process and the flushing process. When the predetermined amount of water supply is completed, the process will be transferred to the weak cleaning process (step S8).

In the weak cleaning step (step S8), when the predetermined water level set to turn on the warm water heater 18 is reached, the control unit 22 turns on the warm water heater 18 (ON). In the weak cleaning step, shaking stirring is performed to shake the drum 4 at an angle of less than 150 degrees (including substantially less than 150 degrees). In addition, in the weak cleaning step, rolling stirring may be performed by intermittently rotating the drum 4 once or more.

Here, the rolling stirring is performed by the number of rotations to the extent that the laundry does not stick to the inner wall of the drum 4. That is, it is performed by the number of rotations for slap cleaning. The aforementioned slap cleaning is performed by the rotation of the drum 4, the laundry will be lifted by the baffle 5, and the laundry will be washed down from the top down.

The shaking agitation is a stirring to shake the drum 4 at an angle that does not tap the washing clothes. In this embodiment, the control unit 22 shakes the drum 4 at an angle of less than 150 degrees (including substantially less than 150 degrees).

FIG. 4 is a time chart showing an example of shaking stirring in this embodiment. As shown in FIG. 4, the control unit 22 causes the drum 4 to rotate in one direction (time a in the figure) to stop the motor 9 and rotate the drum 4 until the laundry will be Become the position of the lower position. After a predetermined time (time b in the figure), the control unit 22 causes the drum 4 to rotate in the opposite direction (time a in the figure) to stop the motor 9, and the drum 4 is caused by the self-weight of the laundry that has become biased. Rotate to the position where the clothing will become the lower position. That is, the so-called shaking stirring is a process of shaking the drum 4 in the forward direction and the opposite direction.

Shaking and stirring is an operation that repeats this action. By shaking the drum 4, the laundry can be kneaded with the washing water hitting the laundry. With this, the washing mechanical force applied to the laundry can be reduced.

In this embodiment, regardless of the length of the weak cleaning step, the shaking time a of the drum 4 and the number of times the drum 4 is shaken in FIG. 4 are constant. That is, regardless of the length of the operation time of the weak cleaning process, the control unit 22 does not change the shaking time a and the number of times of shaking (no increase or increase). Here, the term "constant" includes not only a completely constant case, but also a substantially constant case.

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

Thereby, regardless of the length of the operation time of the weak cleaning process, the number of times the drum 4 is shaken becomes constant, so the cumulative value of the washing mechanical force applied to the laundry in the weak cleaning process can be made constant (that is, the (The accumulated value of the washing mechanical force applied to the laundry in the washing process is fixed at a predetermined value). With this, the damage to the clothes can be kept to a certain degree.

FIG. 5(a) is a time chart showing an example of the cleaning process of the present embodiment, and shows the cleaning process in which only the shaking and stirring are performed in the weak cleaning process. Since only shaking and stirring is performed, the washing mechanical force on the laundry can be reduced, and the damage to the laundry can be suppressed. The laundry will be in a state of kneading and washing, and regardless of the length of the running time of the washing process, the washing mechanical force applied to the laundry can be kept almost constant. With this, the damage to the clothes can be kept to a certain degree. In addition, in the present embodiment, the cleaning step is composed of a detergent dissolving step, a weak cleaning step, and a main cleaning step. As described above, the weak cleaning process is a process that suppresses washing mechanical force, and the main cleaning process is a process that promotes cleaning. The washing mechanical force of the formal washing process is greater than that of the weak washing process.

FIG. 5(b) is a time chart showing another example of the cleaning process of this embodiment, and shows a cleaning process in which rolling stirring is performed in the first half of the weak cleaning process and shaking stirring is performed in the second half. In the weak cleaning step of this embodiment, the time before the half of the rolling stirring is set to be constant, and the length of the cleaning step is adjusted according to the length of the second half of the weak cleaning step. By performing rolling stirring in the first half of the weak cleaning process to improve the solubility of the lotion, the permeability of the lotion components to the clothes can be improved and the washing performance can be improved. In this cleaning process, rolling stirring was performed in the first half of the weak cleaning process. Since the rolling stirring is performed only a few times, the damage to the clothes can be suppressed. In this washing process, the accumulated value of the washing mechanical force applied to the laundry may be kept constant regardless of the length of the operation time of the washing process (that is, the accumulated value of the washing mechanical force applied to the laundry may be fixed to a predetermined value) , And can keep the damage to clothing to a certain extent.

The time charts shown in FIGS. 5(a) and (b) are diagrams showing an example of the cleaning process of the present embodiment, and are not intended to limit the present invention.

Here, the washing mechanical force means the mechanical and physical forces that the laundry bears during washing. Specifically, the washing mechanical force refers to the washing mechanical force specified in JIS L1930 according to the maintenance label symbol of the laundry, and the aforementioned laundry is the laundry targeted by the fashion laundry washing stroke of this embodiment. In addition, the predetermined value of the washing mechanical force refers to, for example, the mechanical force specified on the maintenance label symbol.

In addition, in the present embodiment shown in FIG. 5(a), the number of times the drum 4 is shaken and the rotation time a are kept constant regardless of the length of the operation time, but the rotation time a and The stationary time b is set to be constant to change the length of the operating time. Even with this configuration, the laundry is kneaded by the washing water by the shaking of the drum 4, so the mechanical force on the laundry is reduced, and damage to the laundry can be suppressed. In addition, when the operation time becomes longer, the number of times the drum 4 is shaken may increase together with the rest time b. Even with this configuration, the same effect is exerted.

Furthermore, instead of shaking and stirring, it may be changed to a configuration in which the circulation pump 19 is intermittently driven while the drum 4 is stopped. In this configuration, since the laundry is kneaded by circulating washing water, the washing mechanical force on the laundry is reduced as in the case of shaking and stirring, and damage to the laundry can be suppressed. It may be configured to combine shaking and driving of the circulation pump 19.

In these washing processes, the cumulative value of the washing mechanical force applied to the clothes can be kept almost constant regardless of the length of the operation time of the weak washing process, and the damage to the clothes can be kept to a certain degree.

When the water temperature detection unit 26 detects that the temperature of the washing water has become higher than a predetermined temperature (step S10), it will shift to the formal washing process (step S11). In this embodiment, the predetermined temperature is set to 37°C. For example, 90% of sebum melts at about 37°C to become a liquid, and the lotion enzyme becomes active at about 37°C. Therefore, by shifting from the weak cleaning process to the main cleaning process at about 37°C, the washing mechanical force is suppressed and a high cleaning effect can be expected.

In the main washing step (step S11), when the sebum becomes easily and effectively shed due to the effect of warm water, rolling stirring is performed intermittently. When the temperature of the washing water reaches approximately 40°C, the control unit 22 will intermittently turn on the warm water heater to maintain approximately 40°C (step S12).

After a predetermined time has elapsed in the official cleaning process (step S11), the control unit 22 ends the cleaning process.

In the rinsing (1) step (step S13) of the next step, the water in the water tank 3 is drained by opening the drain valve 15 to perform intermediate dehydration. By applying centrifugal force to the laundry, water is separated from the laundry, water is supplied, and the motor 9 is driven, and the washing and agitation for discharging the washing liquid from the laundry starts.

The control unit 22 drains the water in the water tank 3 after rinsing and stirring for a predetermined period of time, and ends the rinsing (1) process after dehydration.

In the rinse (2) step (step S14), that is, in the final rinse step, drainage and intermediate dehydration are performed in the same manner as the rinse (1) step, and after the completion of these steps, rinse stirring will start.

After the rinsing (2) process (step S14) is completed, the control unit 22 shifts to the dehydration process (step S15).

In the dehydration step (step S15), after the rinse (2) step is completed, the drain valve 15 is opened to drain the water in the water tank 3. Then, the control unit 22 drives the motor 9 to rotate the drum 4 at a high speed for a predetermined period of time to apply centrifugal force to the laundry to separate the moisture from the laundry, and the fashion laundry washing process ends.

Although the present embodiment described above has been described based on a drum-type washing machine, it can also be applied to a vertical washing machine. In the vertical washing machine, in the washing process of fashionable clothes, immersion cleaning is performed, or the washing tank is rotated at a high speed in one direction by washing and cleaning instead of shaking and stirring. In addition, it may be configured to perform reverse stirring in which the washing tub is reversed in reverse, instead of rolling stirring.

In addition, although a heater is used as the heating part of the washing water, other heating parts such as IH may be used instead of the heater.

As described above, the washing machine of the present invention can be suppressed to a washing mechanical force within a predetermined range regardless of the washing conditions such as the washing water temperature or the amount of cloth, and can achieve stable washing, so it can also be applied to fashionable clothes It is used for other washing machines such as strokes or soaking strokes.

1: shell 2: damper 3: sink 4: Roller 4a: axis of rotation 5: Bezel 6: small hole 7: opening 8: Balancer 9: Motor 10: Water supply valve 11: Water supply piping 12: lotion box 13: Water supply path 14: Water supply port 15: Drain valve 16: Drainage path 17: Drain 18: Warm water heater 19: Circulation pump 20: circulation path 21: Spit out 22: Control Department 23: cloth quantity detection department 24: Water level detection department 25: Rotation detection section 26: Water temperature detection department 27: Door 28: Operation display section a: shaking time b: still time S1~S15: Step θ: angle

FIG. 1 is a schematic configuration diagram of a drum-type washing machine in a first embodiment of the present invention. 2 is a functional block diagram of the same drum-type washing machine. Fig. 3 is a flow chart of the fashion washing process of the same drum-type washing machine. Fig. 4 is a time chart of shaking and stirring of the same drum-type washing machine. Fig. 5 is a timing chart of the washing process of the same drum-type washing machine.

S1~S15: Step

Claims (6)

A washing machine with: Sink A temperature detection section for detecting the temperature of the washing water; and The control unit is used to execute the cleaning process. The foregoing cleaning process includes: a weak cleaning process; and a formal cleaning process, the washing machine is subjected to a greater washing mechanical force than the aforementioned weak cleaning process, which promotes cleaning. In addition, the control unit changes the time of the weak cleaning process according to the temperature of the washing water detected by the temperature detecting unit, In addition, the cumulative value of the washing mechanical force in the weak cleaning process becomes constant regardless of the length of the time in the weak cleaning process. If the washing machine of claim 1, it has: The cloth amount detection part is used to detect the cloth amount of the washed object, In addition, the control unit changes the time of the weak cleaning step in accordance with the cloth amount of the laundry and the temperature of the washing water. The washing machine according to claim 1 or 2, wherein the weak washing step includes a shaking and stirring step for swinging the washing tub in a forward direction and a reverse direction, and the preceding of the weak washing step is changed according to the length of the shaking and stirring step time. The washing machine of claim 1, wherein the control unit executes the weak cleaning process before the main cleaning process. If the washing machine of claim 3 or 4 has: The heating part is used to heat the washing water, In addition, the control unit controls the heating unit to heat the washing water in the weak washing step. According to the washing machine of claim 5, the control unit performs control after the temperature of the washing water in the weak washing process becomes higher than a predetermined temperature to shift from the weak washing process to the main washing process.

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