TW202413765A - How to sterilize washing machines and outer tubs of washing machines - Google Patents

Abstract

The washing machine disclosed in the present invention comprises: a washing tank for accommodating washings; an outer tank rotatably containing the washing tank; a motor for rotating the washing tank; a functional particle supply assembly for supplying functional particles into the outer tank; and a control assembly for controlling the movement of the motor and the functional particle supply assembly, wherein the control assembly performs a tank cleaning process, and the tank cleaning process comprises: a sterilization process for moving the motor and the functional particle supply assembly; and a drying process for moving the motor before the sterilization process.

Description

Washing machine and method for sterilizing outer tank of washing machine

The present disclosure relates to a washing machine.

For example, Patent Document 1 discloses a washing machine that achieves sterilization and inhibition of mold growth in a washing machine tank without relying on chemicals or heating.

The washing machine described in Patent Document 1 is equipped with: an electrostatic atomization generating component for supplying electrostatic atomization generating particles; a washing tank for accommodating washings; an outer tank rotatably containing the washing tank; and an air blower. The air blower supplies the electrostatic atomization generating particles to the washing tank and the outer tank. Prior Art Documents

Patent document Patent document 1: Japanese Patent Publication No. 2010-51513

However, in the washing machine described in Patent Document 1, there is still room for improvement in terms of improving the sterilization performance of mold spores in the outer tank.

Therefore, the purpose of the present disclosure is to solve the above-mentioned problems and to provide a washing machine with improved sterilization performance of mold spores in the outer tank.

A washing machine according to one aspect of the present disclosure comprises: a washing tank for accommodating washings; an outer tank rotatably containing the washing tank; a motor for rotating the washing tank; a functional particle supply assembly for supplying functional particles into the outer tank; and a control assembly for controlling the operation of the motor and the functional particle supply assembly, wherein the control assembly performs a tank cleaning process, and the tank cleaning process comprises: a sterilization process for operating the motor and the functional particle supply assembly; and a drying process for operating the motor before the sterilization process.

A method for sterilizing an outer tank of a washing machine according to one aspect of the present disclosure is a method for sterilizing the outer tank of a washing machine, wherein the washing machine comprises: a washing tank for accommodating washings; and an outer tank for rotatably housing the washing tank. The method comprises the following steps: a sterilization step, wherein a control component for controlling the movement of the washing machine operates a motor and a functional particle supply component, wherein the motor rotates the washing tank, and the functional particle supply component supplies functional particles into the outer tank; and a drying step, wherein the control component operates the motor before the sterilization step.

According to the present disclosure, a washing machine can be provided that improves the sterilization performance of mold spores in the outer tank.

Form for implementing the invention (Knowledge and insights that form the basis of the present disclosure, etc.) When the inventors thought of the present disclosure, there were already problems such as mold adhering to clothes after washing operation or smelling mold when opening the lid of the washing machine, and the demand for suppressing mold production in washing machines has increased. From the perspective of energy saving and time reduction, a washing and drying machine that can perform a drying operation is a highly airtight structure in order to improve the drying efficiency. Therefore, a washing and drying machine is more likely to meet the conditions for mold production such as water, temperature, nutrition, and oxygen than a washing machine. In a washing machine, mold is more likely to be produced in the outer tank located on the outside of the washing tank than on the inside of the washing tank. Specifically, during the dehydration operation, water moves from the washing tank to the outer tank due to centrifugal force. Part of the water does not drain from the outer tank after the operation is completed, but remains in the outer tank. In a certain washing and drying machine, the interval between the washing tank and the outer tank is narrow, and in order to ensure the drying performance, the structure between the washing tank and the outer tank is made so that air is not easy to enter (maze shape, etc.). The temperature rises temporarily during the drying operation, and the temperature drops after the drying operation is completed. The humidity rises as the temperature drops. Therefore, it is easy to maintain a high humidity environment in the space between the washing tank and the outer tank.

To prevent mold from growing, it is effective to sterilize mold spores on a daily basis. Mold is mainly produced by repeating the cycle of spores and hyphae. The mechanism of mold production in washing machines is explained. First, mold spores enter the washing tank through the air present in the laundry or the installation space of the washing machine, and take root in the washing tank or the outer tank. The mold spores will grow when the conditions of water, temperature and nutrients are met. Specifically, spores germinate, hyphae grow, and finally mycelium is formed. Mycelium has the ability to produce new spores. Once mycelium is formed, spores will continue to fly in the washing tank or the outer tank, and accelerated contamination will occur. In addition, if mold is visually detected, this is the case where mycelium has been generated.

The method to prevent the formation of this hyphae is to sterilize the mold spores. For example, there are sterilization methods that are performed by regularly using hot water to clean the tank, or sterilization methods that are performed by regularly using chemicals such as chlorine. The method using hot water has problems such as increased water usage and operating noise. In addition, the method using chemicals has the problem of cost. Therefore, it is difficult to use the above methods at a high frequency. In addition, it is very difficult to sterilize mold spores with the heat generated by the dry operation.

Therefore, there is a technology called tank cleaning process that is run at the end of the washing operation to inhibit mold generation. This technology uses electrostatic atomization to generate particles to inhibit mold in the washing tank and the outer tank only through the operation of the air supply component and the electrostatic atomization generating component. This technology does not use chemicals or heat, so the operating cost is cheap and it can be operated after each washing. However, when using the air supply component, most of the electrostatic atomization particles that flow into the washing tank along with the wind will only be supplied to the washing tank, making it difficult to deliver to the outer tank where mold is easily generated.

The present disclosure provides a washing machine, which, during a tank cleaning process, generates air flow by the rotation of a washing tank to deliver functional particles, thereby delivering the functional particles to the wall surface of an outer tank where mold is easily generated.

The following describes the implementation in detail with reference to the drawings. However, sometimes more detailed descriptions than necessary are omitted. For example, sometimes detailed descriptions of well-known matters or repeated descriptions of substantially the same structures are omitted. This is because the following description should not be more lengthy than necessary so that it can be easily understood by those with ordinary knowledge in the relevant technical field.

In addition, the attached drawings and the following descriptions are provided to enable those with ordinary knowledge in the relevant technical field to fully understand the present disclosure, and are not intended to limit the subject matter described in the scope of the patent application. (Implementation form)

The washing machine according to the embodiment of the present disclosure is described. [Overall structure]

Fig. 1 is a perspective view of the washer-dryer in the embodiment 1 of the present disclosure. Fig. 2 is a longitudinal sectional view of the washer-dryer 1. Fig. 3 is a transverse sectional view of the washer-dryer 1. Fig. 4 is a block circuit diagram of the washer-dryer 1.

The washer-dryer 1 of this embodiment is a washing machine with a drying function (so-called drum-type washing machine-dryer). As shown in Figures 1 to 4, the washer-dryer 1 has a housing 6, an outer tank 8, a washing tank 2, a motor 14, a heat pump unit 10, an air supply path 23, a water supply valve 30, a drain valve 31, a functional particle supply component 3, a control component 25 and an operation display unit 5. <Housing>

As shown in FIG. 1 , the housing 6 is a component that forms the appearance of the washer-dryer 1. An opening 6a and a door 4 that can be opened and closed and covers the opening 6a are provided on the front of the housing 6. <External tank>

As shown in FIG. 2 , the outer tank 8 is a roughly cylindrical member, which is arranged inside the housing 6 and has the function of storing washing water. The outer tank 8 has an opening at a position facing the opening 6a of the housing 6 and is tightly connected to the opening 6a of the housing 6. The outer tank 8 is further provided with a plurality of openings 33, 34 and a drain port 35. The openings 33, 34 are openings connected to the air supply path 23, and the drain port 35 drains the water in the outer tank 8 to the outside. The openings 33, 34 are arranged at the upper part of the outer tank 8, and the drain port 35 is arranged at the lower part of the outer tank 8.

As shown in FIG3 , a recessed portion 39 that is recessed downward is formed on the circumferential surface of the outer tank 8 above the drain port 35. The recessed portion 39 is connected to the drain port 35 on the downstream side, and is connected to the washing tank 2 on the upstream side through an opening 38 formed on the circumferential surface of the outer tank 8. Water flows into the recessed portion 39 from the opening 38, and is finally discharged from the drain port 35. The top of the recessed portion 39 is partially covered by a water stop rib 37, and is partially open as the opening 38. The water stop rib 37 is a component that protrudes from the inner wall surface of the outer tank 8 in the circumferential direction of the outer tank 8. Specifically, the water stop rib 37 covers the downstream side (the left side in FIG3 ) of the top of the recessed portion 39 during the dehydration rotation. With this structure, the water stop rib 37 can prevent the water that has flowed into the recess 39 from flying upward on the downstream side during dewatering, and induce the water to flow toward the drain port 35. On the other hand, a part of the water stop rib 37 can be cut off to form an opening 38. <Washing tank>

Returning to FIG. 2 , the washing tank 2 is a roughly cylindrical member that is rotatably disposed inside the water tank 8 and accommodates laundry such as clothing. A plurality of through holes 2a are formed in the washing tank 2. The through holes 2a connect the washing tank 2 with the outer tank 8, allowing water and air to move between the washing tank 2 and the outer tank 8. The washing tank 2 further has an opening at a position facing the opening 6a of the housing 6. ＜Motor＞

The motor 14 is a component that drives the washing tank 2 to rotate. The motor 14 drives the washing tank 2 to rotate in the forward and reverse directions. In the present embodiment, the motor 14 is a belt-type motor that acts on the washing tank 2 through a pulley. Therefore, there may be a situation where the number of rotations of the motor 14 is different from the number of rotations of the washing tank 2. On the other hand, the motor 14 may also be other types of motors such as a direct drive motor. <Heat pump unit>

The heat pump unit 10 is disposed in the air supply path 23 and is a device for dehumidifying and heating the air flowing in the air supply path 23. The heat pump unit 10 is installed in the upper part of the housing 6.

The heat pump unit 10 includes, for example, a compressor, a throttling mechanism, a heating heat exchanger, a dehumidification heat exchanger, and a refrigerant pipe. <Air supply path>

The air supply path 23 is provided inside the housing 6 and is a flow path for circulating air between the outer tank 8 and the heat pump unit 10. The air supply path 23 is a generally closed system. One end of the air supply path 23 is connected to the opening 33 of the outer tank 8, and the other end of the air supply path 23 is connected to the opening 34 of the outer tank 8. In the present embodiment, the opening 34 is provided on the back of the outer tank 8. The opening 34 may also be provided on the front side of the outer tank 8 or on the peripheral surface of the outer tank 8. Similarly, the opening 33 may also be provided on the front side of the outer tank 8, the back side of the outer tank 8, or the lower part of the outer tank 8. <Air supply fan>

The air supply fan 11 is a mechanism such as a fan that generates air flow in the air supply path 23. The air supply fan 11 generates air flow that circulates in the air supply path 23 (see arrow F). The air supply fan 11 is driven to rotate by the air supply fan motor 13. <Water supply valve>

The water supply valve 30 is a valve for supplying water to the outer tank 8. The water supply valve 30 is provided on the upper part of the housing 6. <Drain valve>

The drain valve 31 is a valve for selectively draining the water accumulated in the outer tank 8 through the drain port 35 of the outer tank 8. The drain valve 31 is provided at the lower part of the housing 6. <Functional particle supply assembly>

The functional particle supply assembly 3 is a device for supplying functional particles. The functional particle supply assembly 3 is disposed downstream of the air supply fan 11 in the air supply path 23. The functional particle supply assembly 3 delivers the functional particles to the outer tank 8 and the washing tank 2 through the air supply path 23.

In this specification, the so-called functional particles are particles that can sterilize or inhibit bacteria, viruses, pollen, etc. The particles can be in the form of solid, liquid or gas. Functional particles can also contain charged microparticles of water, ions, ozone and other substances. Functional particles can sterilize mold spores attached to the wall of the outer tank 8. Specifically, the functional particles are delivered to the wall of the outer tank 8 by the flow of air, thereby sterilizing the mold spores attached to the wall of the outer tank 8. In addition, the functional particles can sterilize the mold spores attached to the wall of the washing tank 2 and the clothes that have been put into the washing tank 2.

In this embodiment, an electrostatic atomization device is used as the functional particle supply component 3, and charged microparticle water is generated as the functional particles. The charged microparticle water has a longer life in the functional particles. Therefore, more functional particles that maintain the sterilization function (that is, have not yet been inactivated) can be delivered to the wall surface of the outer tank 8. Therefore, in the washing and drying machine 1, the sterilization performance of mold spores can be improved.

In addition, ions can be used as functional particles, and an ion generating device can be used as a functional particle supply component 3. In addition, ozone can be used as functional particles, and an ozone generating device can be used as a functional particle supply component 3. <Control component>

The control unit 25 is a component for controlling the operation of the washing and drying machine 1. The control unit 25 may also include, for example, a memory (not shown) storing programs and a processing circuit (not shown) corresponding to a processor such as a CPU, and the processor executes the programs to function as these elements.

As shown in FIG. 4 , the control component 25 controls the components of the washing and drying machine 1 such as the motor 14, the water supply valve 30, the drain valve 31, the heat pump unit 10, the functional particle supply component 3 and the air supply fan motor 13 according to the information input through the operation display unit 5. ＜Operation Display Unit＞

The operation display unit 5 is a mechanism that can be operated by the user of the washing and drying machine 1. The operation display unit 5 is arranged on the upper part of the housing 6, and input is made from the input setting component (not shown) of the operation display unit 5, and the display component (not shown) displays the input information to notify the user. [Action]

In the above configuration, an example of the operation of the washer-dryer 1 performing the tub cleaning cycle will be described with reference to Figures 5 and 6. Figure 5 is a process diagram of the washing operation and tub cleaning cycle performed by the washer-dryer 1. Figure 6 is an action diagram of the washing operation and tub cleaning cycle performed by the washer-dryer 1.

The user selects a laundry processing course to be executed through the operation display unit 5. For example, the user selects a laundry processing course of a washing operation and a tank cleaning course.

When the above-mentioned laundry processing stroke is selected, the control component 25 performs the washing operation and the tank cleaning stroke in sequence. As shown in Figure 5, the control component 25 performs the washing operation, and performs the tank cleaning stroke after the washing operation is completed.

After the user puts the laundry into the washing tub 2 and closes the door 4, the control assembly 25 starts the washing operation. The washing operation includes a washing process, a cleaning process and a dehydration process. The control assembly 25 performs the washing process, the cleaning process and the dehydration process in sequence. In the washing process, the control assembly 25 puts detergent into the washing tub 2 and supplies water, and rotates the washing tub 2 by the motor 14 to wash the laundry. In the cleaning process, the control assembly 25 supplies water and rotates the washing tub 2 to wash the laundry. In the dehydration process, the control assembly 25 drains the washing water to the outside of the housing 6, and then rotates the washing tub 2 at a high speed to dehydrate the laundry. On the other hand, the control unit 25 can also replace the washing operation and perform the dehydration process alone, or perform the dehydration process in combination with other processes. By performing the dehydration process, it is possible to prevent the tank cleaning process from being performed in a state where water is accumulated in the washing tank 2.

Afterwards, the control assembly 25 ends the washing operation.

When the washing operation is finished, the control module 25 automatically transfers the process to the tank cleaning process. When the process automatically transfers to the tank cleaning process, the washing and drying machine 1 becomes a tank cleaning process standby state. In the tank cleaning process standby state, the user opens the door 4 to take the laundry out of the washing tank 2, and then closes the door 4.

Afterwards, the control assembly 25 starts the tank cleaning stroke. On the other hand, the control assembly 25 can also operate the tank cleaning stroke as an individual stroke.

The tank cleaning process includes a drying process and a sterilization process. The control unit 25 performs the drying process and the sterilization process in sequence. The drying process is performed to remove the residual water in the outer tank 8 after the dehydration process. The sterilization process is performed to deliver the functional particles to the wall surface of the outer tank 8.

First, the control unit 25 performs a drying process. As shown in FIG5 , in the drying process, the control unit 25 operates the motor 14 and the air supply fan 11. On the other hand, the control unit 25 does not operate the functional particle supply unit 3.

In the drying process, the washing tub 2 is rotated by operating the motor 14. When the washing tub 2 rotates, air flow is generated in the air supply path 23. Here, the air flow caused by the rotation of the washing tub 2 is described in comparison with the air flow caused by the air supply fan 11 with reference to FIG. 2 and FIG. 7. FIG. 7 is a longitudinal sectional view of the washing and drying machine 1 showing the air flow caused by the rotation of the washing tub 2.

As shown in FIG2 , when the washing tank 2 is stationary, when the air supply fan 11 rotates, air flows into the inside of the washing tank 2 from the opening 34, and flows out from the opening 33 through the upper part of the washing tank 2 (arrow F). As a result, it becomes difficult for the air to flow to the entire area R1 between the washing tank 2 and the outer tank 8. On the other hand, as shown in FIG7 , when the washing tank 2 rotates, the centrifugal force acts on the air in the washing tank 2, and the air flows out through the through hole 2a toward the outer tank 8 located on the outer side of the washing tank 2 (arrow C). Since the air flows out due to the centrifugal force, the air also flows away from the area R1 of the opening 34. That is, by the rotation of the washing tank 2, the air becomes easy to flow over the entire region R1 and becomes easy to contact the wall surface (for example, the wall surface of the outer tank 8) constituting the region R1. Therefore, by the rotation of the washing tank 2, the wall surface constituting the region R1 can be efficiently dried.

When the air flows out of the washing tank 2, a negative pressure is formed in the washing tank 2, so that the air flows into the washing tank 2 from the air supply path 23. In this way, the rotation of the washing tank 2 generates a flow of air circulating through the air supply path 23.

By further operating the air supply fan 11, the flow of air in the air supply path 23 can be further promoted.

5 and 6 , more specifically, the drying process includes a normal temperature air supply process and a heated air supply process. The normal temperature air supply process and the heated air supply process differ in terms of whether the heat pump unit 10 is turned on or off.

The normal temperature air supply process is equivalent to the rise time of the heat pump unit 10. The heat pump unit 10 requires a rise time until it becomes turned on. The reason is that when the ambient temperature is low, the performance of the heat pump unit 10 may not be able to be exerted as expected. During the rise time, for example, the compressor of the heat pump unit 10 is rotated at a low speed or is only powered on to raise the refrigerant temperature to above the predetermined temperature. In this way, the performance of the heat pump unit 10 can be exerted as expected. As shown in Figure 6, in the normal temperature air supply process, the control component 25 activates the air supply fan 11 and the motor 14. In other words, the control component 25 activates the air supply fan 11 and the motor 14 during the rise time of the heat pump unit 10. On the other hand, the control module 25 does not operate the functional particle supply module 3 and the heat pump unit 10. In addition, the control module 25 can also operate the functional particle supply module 3 in the normal temperature air supply process.

Next, in the heating and air supply process, the control module 25 operates the heat pump unit 10, the air supply fan 11 and the motor 14. On the other hand, the control module 25 does not operate the functional particle supply module 3.

When the control module 25 operates the heat pump unit 10, the air supply fan 11 is operated at the same time. After cooling and heating the air flowing out of the washing tub 2 to the air supply path 23, in order to make it flow into the washing tub 2 again, the air supply fan 11 promotes the circulation of the air.

In other words, in the drying process, the control module 25 delays the start of the operation of the heat pump unit 10 relative to the start of the operation of the air supply fan 11 and the motor 14. That is, the control module 25 provides a standby time during the drying process in which the heat pump unit 10 does not operate but is on standby between the start of the operation of the air supply fan 11 and the start of the operation of the heat pump unit 10.

The normal temperature air supply process is shorter than the heated air supply process. Specifically, the normal temperature air supply process is 3 minutes, and the heated air supply process is 27 minutes. Therefore, the total drying process is 30 minutes. On the other hand, the time of the normal temperature air supply process and the heated air supply process can also be set to a predetermined time arbitrarily.

In this embodiment, during the drying process, the control unit 25 operates the air supply fan 11 and the motor 14 continuously. As will be described later (see FIG. 9 ), the air in the washing tub 2 is guided to the outer tub 8 by the rotation of the motor 14, that is, the rotation of the washing tub 2. By this continuous operation, the air can be continuously delivered to the outer tub 8. Therefore, compared with the case where the motor 14 is driven intermittently, the residual water in the outer tub 8 can be removed in a short time.

Furthermore, by transferring to the sterilization process immediately after the drying process, the temperature drop can be suppressed and the humidity rise can be suppressed. Thus, the residual water around the mold spores in the outer tank 8 can be maintained.

By removing the residual water in the outer tank 8 and maintaining the state in which the residual water has been removed, the amount of functional particles that collide with the residual water and become inactivated can be reduced in the subsequent sterilization step.

Fig. 8A is a schematic diagram of mold spores V1 attached to the outer groove 8 before drying. Fig. 8B is a schematic diagram of mold spores V1 attached to the outer groove 8 after drying.

As shown in FIG8A , before the drying process, the mold spores V1 attached to the outer tank 8 are covered by water droplets W1. Therefore, the functional particles collide with the water droplets W1 instead of the mold spores V1, and are inactivated before reaching the mold spores V1. As shown in FIG8B , after the drying process, the water droplets W1 of the outer tank 8 have become smaller. Therefore, the functional particles can avoid colliding with the water droplets W1 and reach the mold spores V1 while maintaining the sterilization function (i.e., not yet inactivated). The functional particles can directly act on the mold spores V1.

Next, the control unit 25 performs the sterilization process. In the sterilization process, the control unit 25 operates the motor 14 and the functional particle supply unit 3. The control unit 25 maintains the rotation direction and rotation number of the motor 14 that operates in the drying process, that is, the rotation direction and rotation number of the washing tank 2, and operates the motor 14 continuously. On the other hand, the control unit 25 stops the air supply fan 11 and the heat pump unit 10.

In the sterilization process, since the motor 14 and the functional particle supply assembly 3 are operated, the flow of air caused by the rotation of the motor 14 (i.e., the washing tank 2) contains functional particles. Since the functional particles flow out together with the air due to the centrifugal force, the functional particles also flow toward the area R1 away from the opening 34 (refer to the arrow C in FIG. 7 ). That is, by the rotation of the washing tank 2, it becomes easy for the functional particles to flow covering the entire area R1 and become easy to contact the wall surface constituting the area R1 (e.g., the wall surface of the outer tank 8). Therefore, by the rotation of the washing tank 2, the wall surface constituting the area R1 can be efficiently sterilized.

During the sterilization process, the control unit 25 stops the air supply fan 11. When the air supply fan 11 is in operation, air flows from the air supply path 23 through the opening 34 into the outer tank 8. The air preferentially flows out of the washing tank 2 from the opening 33 due to the pressure difference formed by the operation of the air supply fan 11. It becomes difficult for the air to contact the wall surface of the outer tank 8 at a position far from the openings 33 and 34. Therefore, it also becomes difficult for the functional particles to contact the wall surface of the outer tank 8.

Furthermore, the air volume supplied by the air supply fan 11 is larger than the air volume supplied by the rotation of the washing tub 2. When the air supply fan 11 is in operation, the number of functional particles that collide with the wall surface of the air supply path 23 and become inactivated increases. Therefore, the number of functional particles that maintain the sterilization function decreases.

Therefore, by stopping the air supply fan 11, more functional particles maintaining the sterilization function can be delivered to the wall surface of the outer tank 8. In addition, by stopping the air supply fan 11, the operating sound of the sterilization process can be suppressed to be small.

During the sterilization process, the control unit 25 stops the heat pump unit 10. When the heat pump unit 10 is in operation, the air in the air supply path 23 is heated. As the air is heated, the entropy of the functional particles increases. As a result, the functional particles are more likely to be inactivated before being delivered to the outer tank 8.

Therefore, by stopping the heat pump unit 10, more functional particles that maintain the sterilization function can be delivered to the wall surface of the outer tank 8. In addition, by stopping the heat pump unit 10, the energy consumption of the washing and drying machine 1 in the tank cleaning process can be saved.

In this embodiment, in the sterilization process, the washing tank 2 rotates in one direction. By this action, the motor 14 can be inhibited from reversing and decelerating. By inhibiting the deceleration of the motor 14, the flow of air toward the outer tank 8 can be maintained, and more functional particles can be delivered to the wall surface of the outer tank 8. On the other hand, the rotation direction of the washing tank 2 can also be reversed. By this action, the functional particles can be uniformly delivered to the entire region R1.

In addition, in the sterilization process, the rotation direction of the washing tank 2 is the same as the rotation direction of the dehydration process (arrow B shown in Figure 3). Specifically, the rotation direction of the washing tank 2 in the sterilization process and the dehydration process is the opposite direction to the direction in which the water stop rib 37 extends.

Again, the rotation direction of the washing tank 2 in the sterilizing process is the same direction as the rotation direction of the washing tank 2 in the drying process. Therefore, it is not necessary to stop the motor 14 in order to reverse between the drying process and the sterilizing process, and it can be operated continuously.

Since the concave portion 39 is partially covered by the water stop rib 37, it is relatively difficult for air to flow in from outside the concave portion 39, so that the air inside the concave portion 39 is easily stagnant. In contrast, in the sterilization process and the drying process, since the rotation direction of the washing tank 2 is opposite to the direction in which the water stop rib 37 extends, it becomes easy for air to flow into the concave portion 39 from the opening 38. Therefore, in the drying process, the outer tank 8 can be dried as a whole, and in the sterilization process, the functional particles can act on the wall surface of the outer tank 8 as a whole.

In this embodiment, although the rotation direction of the washing tank 2 is based on the right direction, it can of course be appropriately set to the left direction.

In the sterilization process, the rotation speed of the washing tank 2 is lower than the rotation speed of the dehydration process (for example, 1000 rpm). By setting the rotation speed of the washing tank 2 to be lower, the load, noise and running cost of the motor 14 can be reduced.

Here, the rotation speed of the washing tub 2 in the sterilization process will be described in more detail with reference to Fig. 9. Fig. 9 is a diagram showing the delivery efficiency of the functional particles in the outer tub 8 of the washing and drying machine 1.

An evaluation was conducted to understand the relationship between the rotation number of the washing tank 2 and the delivery ratio of the functional particles. For the evaluation sample, a substance whose absorption spectrum changes due to decomposition by chemical reaction with the functional particles was used. The so-called chemical reaction is, for example, an oxidation-reduction reaction. In the evaluation test, a plurality of evaluation samples were arranged on the wall of the constituting area R1, and a sterilization process was performed at different rotation numbers of the washing tank 2.

The amount of reaction between the evaluation sample and the functional particles can be determined by detecting the color difference caused by the change in the absorption spectrum. By comparing the color difference ΔE of the evaluation sample before and after the sterilization process, the amount of functional particles delivered can be compared at different rotation numbers. The color difference ΔE is obtained by using the brightness _L0 of the evaluation cloth before the operation, the brightness _L1 of the evaluation cloth after the operation, the color coordinates _a0 of the evaluation cloth before the operation, the color coordinates _a1 of the evaluation cloth after the operation, the color coordinates _b0 of the evaluation cloth before the operation, and the color coordinates _b1 of the evaluation cloth after the operation, which are obtained as measured values, and by using equations (1) to (4). ΔE=√(ΔL ² +Δa ² +Δb ² ) (1) ΔL=L ₀ -L ₁ (2) Δa=a ₀ -a ₁ (3) Δb=b ₀ -b ₁ (4)

The functional particle delivery ratio A to the outer tank 8 is calculated by the color difference ΔE _x at a predetermined rotation number x and the color difference ΔE ₃₅ at a rotation number of 35 rpm using the following formula (5). A=ΔE _x /ΔE ₃₅ (5)

As shown in FIG9 , by a rotation number of 20 rpm or more, the flow of air and functional particles through the through hole 2a can be promoted by sufficient centrifugal force. By a rotation number of 100 rpm or less, the centrifugal force can be properly maintained, and the functional particles can be prevented from colliding with the wall of the air supply path 23 and being inactivated. In addition, it can be seen that at 35 rpm, the amount of functional particles delivered to the outer tank 8 is the largest ratio A. Therefore, the rotation number of the washing tank 2 in the sterilization process can be more than 20 rpm and less than 100 rpm, and is ideally 35 rpm.

The evaluation test shown in FIG9 can confirm the condition under which the delivery amount of functional particles becomes high. In other words, the condition can be said to be the condition under which the delivery amount of air containing functional particles becomes high. Therefore, the evaluation test shown in FIG9 can also confirm the condition under which the delivery amount of air to the region R1 becomes high during the drying process.

5 and 6, the number of rotations of the washing tank 2 in the sterilization process is the same as the number of rotations of the washing tank 2 in the drying process. Therefore, it is not necessary to decelerate the washing tank 2 between the drying process and the sterilization process, and the washing tank 2 can be operated continuously at a constant speed.

The sterilization process is longer than the drying process, for example, 150 minutes. By this operation, 99% of the mold spores in the outer tank 8 can be sterilized. In addition, the functional particle supply assembly 3 is operated continuously and circulated inside the washing and drying machine 1, so that the concentration of the functional particles in the outer tank 8 can be increased and maintained at a high concentration.

After 150 minutes from the start of the sterilization process, the control component 25 will automatically turn off the power of the washing and drying machine 1. [Effect 1]

According to the washing and drying machine 1 of the embodiment, the following effects can be exerted.

As described above, the washer-dryer 1 of this embodiment has: a washing tub 2 for accommodating washings; and an outer tub 8 in which the washing tub 2 is rotatably mounted. The washer-dryer 1 has: a motor 14 for rotating the washing tub 2; and a water supply assembly (water supply valve 30) for supplying washing water to the outer tub 8. The washer-dryer 1 has: an air supply path 23 for supplying air to the outer tub 8; and a functional particle supply assembly 3 disposed in the air supply path 23 and supplying functional particles to the outer tub. The washer-dryer 1 has: a control assembly 25 for controlling the operation of the motor 14 and the functional particle supply assembly 3. The control unit 25 executes a tank cleaning process (sterilization process), wherein the tank cleaning process operates the motor 14 and the functional particle supply unit 3 to sterilize the washing tank 2 and the outer tank 8 .

With this configuration, by rotating the washing tub 2, centrifugal force acts on the air and the functional particles, causing the air and the functional particles to flow toward the outside of the washing tub 2. Therefore, it becomes easy to deliver the functional particles to the wall surface of the outer tub 8, and the mold spores attached to the wall surface of the outer tub 8 can be sterilized. Therefore, in the washing and drying machine 1, the sterilization performance of the mold spores in the outer tub 8 can be improved.

In the washer-dryer 1 of the present embodiment, the rotation speed of the washing tub 2 in the sterilization step is lower than the rotation speed of the washing tub 2 in the dehydration step for dehydrating the laundry.

With this configuration, sufficient centrifugal force can be ensured to deliver the functional particles to the outer tank 8, and the load on the motor 14 can be reduced. Therefore, a long sterilization process can be realized.

In the washer-dryer 1 of the present embodiment, the rotation speed of the washing tub 2 in the sterilization step is 20 rpm or more and 100 rpm or less.

With this configuration, more functional particles can be delivered to the outer tank 8 while maintaining the sterilization function.

The washing and drying machine 1 of this embodiment is further equipped with an air supply component (air supply fan 11) which is arranged in the air supply path 23 and supplies air. The control component 25 stops the air supply fan 11 during the sterilization process.

With this configuration, compared to the case where the air supply fan 11 is driven, there is no pressure difference in the air supply path 23, so it is difficult for air and functional particles to be sucked into the air supply path 23 from the opening 33, and it is easy for air and functional particles to flow toward the outer tank 8 away from the air supply path 23. Therefore, more functional particles can be delivered to the wall surface of the outer tank 8.

In the washer-dryer 1 of the present embodiment, the rotation direction of the washing tub 2 in the sterilization step is the same as the rotation direction of the washing tub 2 in the dehydration step for dehydrating the laundry.

With this configuration, the flow of water in the dehydration process and the flow of functional particles in the sterilization process can be made the same by setting the rotation direction to be the same. Therefore, the functional particles can be brought into contact with the place where water adheres and mold is likely to grow.

In the washer-dryer 1 of the present embodiment, a recess 39 for providing a drain port 35 is formed at the lower portion of the outer tub 8. The outer tub 8 has a protrusion (water stop rib 37) extending in the circumferential direction of the outer tub 8 and covering a portion of the upper portion of the recess 39. The rotation direction of the washing tub 2 during the sterilization process is the opposite direction to the direction in which the water stop rib 37 extends.

With this configuration, the inflow of air into the recess 39 into which air is difficult to flow from the outside can be promoted, and the functional particles can be efficiently delivered to the recess 39 .

In the washing and drying machine 1 of this embodiment, the functional particle supplying assembly 3 is an electrostatic atomization device, and the functional particles are charged microparticle water.

With this structure, mold spores can be sterilized.

The washer-dryer 1 of this embodiment comprises: a washing machine; and a heating component (heat pump unit 10) for heating air.

With this configuration, the interior of the washer-dryer 1 can be dried efficiently.

The method for sterilizing the outer tank 8 of the washing machine 1 of the present embodiment is a method for sterilizing the outer tank 8 of the washing machine (washing machine 1), wherein the washing machine comprises: a washing tank 2 for accommodating laundry; and an outer tank 8 for rotatably housing the washing tank 2. The method is that a control component 25 for controlling the operation of the washing machine 1 performs a tank cleaning process, wherein the tank cleaning process operates a motor 14 and a functional particle supply component 3 to sterilize the washing tank 2 and the outer tank 8, wherein the motor 14 rotates the washing tank 2, and the functional particle supply component 3 supplies functional particles into the outer tank 8.

With this structure, by rotating the washing tank 2, air and functional particles flow to the outside of the washing tank 2. Therefore, it becomes easy to deliver the functional particles to the wall surface of the outer tank 8, and mold spores attached to the wall surface of the outer tank 8 can be sterilized. [Effect 2]

As described above, the washing and drying machine 1 of this embodiment has: a washing tank 2 for accommodating washings; an outer tank 8 in which the washing tank 2 is rotatably mounted; and a motor 14 for rotating the washing tank 2. The washing and drying machine 1 has: a functional particle supply component 3 for supplying functional particles into the outer tank; and a control component 25 for controlling the operation of the motor 14 and the functional particle supply component 3. The control component 25 performs a tank cleaning process. The tank cleaning process includes: a sterilization process for operating the motor 14 and the functional particle supply component 3; and a drying process for operating the motor 14 before the sterilization process.

With this configuration, before the functional particle supply assembly 3 is operated, the washing tub 2 is rotated to generate a flow of air toward the outer tub 8, thereby drying the outer tub 8 and reducing the amount of moisture adhering to the outer tub 8. Therefore, in the sterilization process following the drying process, the functional particles can be prevented from colliding with the residual water in the outer tub 8 and being inactivated. Therefore, in the washing and drying machine 1, the sterilization performance of mold spores in the outer tub 8 can be improved.

The washer-dryer 1 of this embodiment is provided with: an air supply path 23 for flowing air into the outer tub 8; a heating component (heat pump unit 10) disposed in the air supply path 23 for heating the air; and an air supply component (air supply fan 11) disposed in the air supply path 23 for supplying air. The control component 25 operates the heat pump unit 10 and the air supply fan 11 for a predetermined time during the drying process.

With this configuration, the heat pump unit 10 and the air supply fan 11 are operated before the functional particle supply module 3 is operated, thereby more efficiently reducing the amount of moisture adhering to the outer tank 8.

In the washer-dryer 1 of the present embodiment, the rotation direction of the washing tub 2 in the drying process is the same as the rotation direction of the washing tub 2 in the sterilization process.

With this configuration, it is possible to avoid deceleration of the motor 14 when the motor 14 rotates in reverse.

In the washer-dryer 1 of the present embodiment, the number of rotations of the washing tub 2 in the drying process and the number of rotations of the washing tub 2 in the sterilizing process are the same.

With this configuration, in the drying process, as in the sterilization process, the air supply efficiency to the outer tub 8 can be improved, and the rotation speed can be set to a small load on the motor 14.

In the washing and drying machine 1 of the present embodiment, in the drying process, after the air supply fan 11 is driven, when the standby time has passed, the heat pump unit 10 is operated.

With this configuration, during the rising time of the heat pump unit 10, since the dry air in the air supply path 23 can be sent to the washing tub 2 to remove the residual water, the rising time can be effectively utilized.

In the washer-dryer 1 of the present embodiment, the control module 25 stops the heat pump unit 10 and the air supply fan 11 during the sterilization process.

With this configuration, more functional particles can be delivered to the wall surface of the outer tank 8 far from the air supply path 23. Also, more functional particles can be delivered while maintaining the sterilization function.

In the washer-dryer 1 of the present embodiment, the control unit 25 stops the functional particle supply unit 3 during the drying process.

With this configuration, the functional particles can be supplied after the residual water in the outer tank 8 has been removed. Therefore, the functional particles can be prevented from colliding with the residual water in the outer tank 8 and being deactivated, and the load on the functional particle supply assembly 3 can be reduced.

The sterilization method of the outer tank 8 of the washing machine and dryer 1 of the present embodiment is a method for sterilizing the outer tank 8 of the washing machine (washing machine and dryer 1), wherein the washing machine comprises: a washing tank 2 for accommodating washings; and an outer tank 8 for rotatably housing the washing tank 2. The method comprises: a sterilization step, wherein the control component 25 for controlling the operation of the washing machine and dryer 1 operates the motor 14 and the functional particle supply component 3, wherein the motor 14 rotates the washing tank 2, and the functional particle supply component 3 supplies functional particles into the outer tank 8. The method comprises: a drying step, wherein the control component 25 operates the motor 14 before the sterilization step.

With this configuration, by rotating the washing tank 2 before operating the functional particle supply unit 3, the outer tank 8 can be dried to reduce the amount of water adhering to the outer tank 8.

In addition, in this embodiment, although the washing and drying machine 1 is described, it is not limited to this. The washing and drying machine can be any machine that can wash laundry. It can also be a washing machine that only has the function of washing laundry. In addition, the washing and drying machine can also be a clothes drying machine that only has the function of drying clothes.

In addition, in this embodiment, although the example in which the washer-dryer 1 has the operation display unit 5 is described, it is not limited to this. For example, the washer-dryer 1 and the server and the communication terminal can also be connected through the Internet, and the user can also perform setting input through the application of the communication terminal.

In addition, in the present embodiment, although the control component 25 is described as executing the laundry processing program input by the user, it is not limited to this. For example, the control component 25 can also execute the laundry processing program downloaded from the server to the washing and drying machine 1.

In addition, in this embodiment, although the example in which the washer-dryer 1 has the air supply path 23 for circulating air is described, it is not limited to this. The washer-dryer 1 can be any one that can dry laundry. The washer-dryer 1 can also have an exhaust path for passing air in one direction. On the other hand, when the washer-dryer 1 has the air supply path 23 for circulating air, the generated functional particles can be circulated in the washer-dryer 1. Therefore, the inside of the washer-dryer 1 can be efficiently sterilized.

Furthermore, in the present embodiment, although the example in which the functional particle supply assembly 3 is arranged downstream of the air supply fan 11 in the air supply path 23 is described, it is not limited to this. The functional particle supply assembly 3 only needs to be arranged at a position where the functional particles can be delivered to the outer tank 8. For example, the functional particle supply assembly 3 can also be arranged at the door 4. In this case, by placing the functional particle supply assembly 3 close to the washing tank 2, the functional particles can be more efficiently delivered to the wall surface of the washing tank 2 and the outer tank 8. However, when the functional particle supply assembly 3 is arranged downstream of the air supply fan 11 in the air supply path 23, the detergent foam or water splashing to the functional particle supply assembly 3 can be prevented, and the failure of the functional particle supply assembly 3 can be suppressed.

In addition, in this embodiment, although the tank cleaning process has an example including a drying step and a sterilization step, the present invention is not limited to this. The tank cleaning process only needs to include a sterilization step.

In addition, in the present embodiment, the time, content, sequence or quantity of the process of the tank cleaning process is only an example. According to the needs, the time can be selected, the sequence of the process can be replaced, or the process or the number of times can be increased.

In addition, in this embodiment, although the tank cleaning process is performed after the washing operation, the present invention is not limited to this. The tank cleaning process may be performed after the drying operation, or may be performed alone without the washing operation.

In addition, in this embodiment, although the example of taking out the laundry from the washing-drying machine 1 before the tank cleaning cycle is described, it is not limited to this. For example, the tank cleaning cycle can be performed before taking out the laundry or after putting in the laundry. Through this action, the functional particles can act on the laundry and sterilize the laundry. On the other hand, when the tank cleaning cycle is performed after taking out the laundry, the functional particles will not contact the laundry and can efficiently reach the wall surface of the outer tank 8.

In addition, in this embodiment, although the example in which the functional particle supply module 3 is operated continuously in the sterilization process is described, the present invention is not limited to this. In the sterilization process, the functional particle supply module 3 may be operated intermittently.

In addition, in this embodiment, although the example of stopping the air supply fan 11 in the sterilization process is described, it is not limited to this. In the sterilization process, the air supply fan 11 can also be temporarily or continuously operated.

In addition, in this embodiment, although the example in which the heat pump unit 10 is stopped during the sterilization process is described, the present invention is not limited to this. In the sterilization process, the heat pump unit 10 may be temporarily or continuously operated.

In addition, in this embodiment, although the example in which the rotation direction of the motor 14 in the sterilization process is one direction is described, it is not limited to this. In the sterilization process, the rotation direction of the motor 14 may also be reversed.

In addition, in this embodiment, although the example in which the functional particle supply assembly 3 is stopped during the drying process is described, the present invention is not limited to this. For example, the functional particle supply assembly 3 may also be operated during the drying process.

The washing machine in the first embodiment comprises: a washing tank for accommodating laundry; an outer tank in which the washing tank is rotatably installed; a housing for elastically supporting the outer tank; a motor for rotating the washing tank; a functional particle supply assembly for supplying functional particles into the outer tank; and a control assembly for controlling the movement of the motor and the functional particle supply assembly, wherein the control assembly performs a tank cleaning process, and the tank cleaning process includes: a sterilization process for moving the motor and the functional particle supply assembly; and a drying process for moving the motor before the sterilization process.

The washing machine in the second embodiment is provided with: an air supply path for flowing air into the outer tub; a heating component arranged in the air supply path for heating the air; and an air supply component arranged in the air supply path for supplying air, wherein the control component causes the heating component and the air supply component to operate for a predetermined time during the drying process.

In the washing machine according to the third aspect, in the washing machine according to the second aspect, the rotation direction of the washing tub in the drying process is the same as the rotation direction of the washing tub in the sterilization process.

In the washing machine according to the fourth aspect, in the washing machine according to the second or third aspect, the number of rotations of the washing tub in the drying process and the number of rotations of the washing tub in the sterilizing process are the same.

As a washing machine in a fifth aspect, in the washing machine in any one of the second to fourth aspects, in the drying process, after the air supply component is driven, when the standby time has passed, the heating component is operated.

As a washing machine in the sixth aspect, in the washing machine in any one of the second to fifth aspects, the control component stops the heating component and the air supply component during the sterilization process.

As a washing machine in a seventh aspect, in the washing machine in any one of the second to sixth aspects, the control component stops the functional particle supply component during the drying process.

According to an eighth aspect, in the washing machine according to any one of the first to seventh aspects, the rotation direction of the washing tub in the tub cleaning process is the same as the rotation direction of the washing tub in the dehydration process for dehydrating the laundry.

As a washing machine in the 9th aspect, in the washing machine in any one of the 1st to 8th aspects, a recess for providing a drain outlet is formed at the lower part of the outer tank, the outer tank has a protrusion, the protrusion extends in the circumferential direction of the outer tank and covers a part of the upper part of the recess, and the rotation direction of the washing tank in the tank cleaning stroke is opposite to the direction in which the protrusion extends.

The method for sterilizing the outer tank of a washing machine in the tenth aspect is a method for sterilizing the outer tank of a washing machine, wherein the washing machine comprises: a washing tank for accommodating washings; and an outer tank for rotatably housing the washing tank, and the method comprises the following steps: a sterilization step, wherein a control component for controlling the movement of the washing machine operates a motor and a functional particle supply component, wherein the motor rotates the washing tank, and the functional particle supply component supplies functional particles into the outer tank; and a drying step, wherein the control component operates the motor before the sterilization step.

Although the present disclosure has been fully described with reference to the attached drawings and the preferred embodiments, various modifications or alterations are obvious to those skilled in the art. Such modifications or alterations should be understood to be included within the scope of the present invention as long as they do not deviate from the scope of the attached patent application.

Industrial Applicability The washing machine disclosed in the present invention is useful as a household washer-dryer, a commercial washer-dryer, or any type of washer-dryer (e.g., a household drum washer-dryer).

1: Washing machine and dryer 2: Washing tank 2a: Through hole 3: Functional particle supply component 4: Door 5: Operation display 6: Housing 6a: Opening 8: External tank 10: Heat pump unit 11: Air supply fan 13: Air supply fan motor 14: Motor 23: Air supply path 25: Control component 30: Water supply valve 31: Drain valve 33,34,38: Opening 35: Drain port 37: Water stop rib 39: Recess B,C,F: Arrow R1: Area V1: Mold spores W1: Water droplets

FIG. 1 is a perspective view of the external appearance of a washer-dryer in Embodiment 1 of the present disclosure. FIG. 2 is a longitudinal sectional view of the washer-dryer. FIG. 3 is a transverse sectional view of the washer-dryer. FIG. 4 is a block circuit diagram of the washer-dryer. FIG. 5 is a process diagram of the washer-dryer. FIG. 6 is an operation diagram of the washer-dryer. FIG. 7 is a longitudinal sectional view of the washer-dryer showing the flow of air caused by the rotation of the washing tank. FIG. 8A is a schematic diagram of mold spores attached to the outer tank before drying. FIG. 8B is a schematic diagram of mold spores attached to the outer tank after drying. FIG. 9 is a diagram of the delivery efficiency of functional particles in the outer tank of the washer-dryer.

Claims (10)

A washing machine comprises: a washing tank for accommodating washings; an outer tank rotatably containing the washing tank; a motor for rotating the washing tank; a functional particle supply assembly for supplying functional particles into the outer tank; and a control assembly for controlling the operation of the motor and the functional particle supply assembly, the control assembly performs a tank cleaning process, the tank cleaning process comprises: a sterilization process for operating the motor and the functional particle supply assembly; and a drying process for operating the motor before the sterilization process. The washing machine of claim 1 is provided with: an air supply path for flowing air into the outer tank; a heating component disposed in the air supply path for heating the air; and an air supply component disposed in the air supply path for supplying air, and the control component causes the heating component and the air supply component to operate for a predetermined time in the drying process. A washing machine as claimed in claim 2, wherein the rotation direction of the washing tub in the drying process is the same as the rotation direction of the washing tub in the sterilization process. A washing machine as claimed in claim 2, wherein the number of rotations of the washing tub in the drying process is the same as the number of rotations of the washing tub in the sterilization process. As for the washing machine of claim 2, in the aforementioned drying process, after the aforementioned air supply component is driven, when the standby time has passed, the aforementioned heating component is activated. A washing machine as claimed in claim 2, wherein the control component stops the heating component and the air supply component during the sterilization process. A washing machine as claimed in claim 2, wherein the control component stops the functional particle supply component during the drying process. A washing machine as claimed in claim 1, wherein the rotation direction of the washing tub in the tub cleaning process is the same as the rotation direction of the washing tub in the dehydration process for dehydrating the laundry. A washing machine as claimed in any one of claims 1 to 8, wherein a concave portion for providing a drain port is formed at the lower portion of the outer tank, the outer tank has a protrusion, the protrusion extends in the circumferential direction of the outer tank and covers a portion of the upper portion of the concave portion, the rotation direction of the washing tank in the tank cleaning process is opposite to the direction in which the protrusion extends. A method for sterilizing the outer tank of a washing machine is a method for sterilizing the outer tank of a washing machine, wherein the washing machine comprises: a washing tank for accommodating washings; and the outer tank rotatably containing the washing tank. The method comprises the following steps: a sterilization step, wherein a control component for controlling the movement of the washing machine causes a motor and a functional particle supply component to move, the motor causes the washing tank to rotate, and the functional particle supply component supplies functional particles into the outer tank; and a drying step, wherein the control component causes the motor to move before the sterilization step.

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