JP2002239288A - Washing machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To not only remove bacteria from a laundry or a washing tub, but also to make it possible without complicating the mechanism. SOLUTION: An installation portion capable of installing a triclosan solid 29 at a position in contact with washing water in an inner tub 4 is provided. Or, in the circulation path for circulating the washing water in the inner tub 4,
The installation part which can install the triclosan solid 29 was provided. Triclosan is effective for eradication, yet it is highly safe for the human body and clothing. Further, triclosan is very hardly soluble in water, does not elute in large amounts at a time, and can be maintained at a predetermined concentration or less without special control. Therefore, the bacteria can be eliminated without complicating the mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a washing machine provided with a disinfecting function.

[0002]

2. Description of the Related Art Conventionally, in a washing machine, washing is performed by storing laundry and water in a washing tub, adding a required amount of detergent, and stirring them. However, at that time, the surfactant in the detergent reacts with the calcium content in the washing water to form insoluble metal soap, which adheres and deposits on the back side (outer peripheral surface) of the washing tub and other parts. . This occurs more remarkably when the detergent is a powdered soap composed of higher fatty acid sodium or the like.

[0003] The generated metal soap deposits also accumulate and accumulate fibrous debris and dirt separated from the laundry, and they absorb moisture to remove microorganisms (fungi). Breed, resulting in mold and odor,
In the subsequent operation, they enter the washing tub together with the water and adhere to the laundry, so that a sufficiently clean washing result cannot be obtained.

[0004] In particular, the washing tub in the washing machine for both dehydration and
Generally, washing is performed by rotating a stirrer in a water tub, and further in a washing tub in the water tub. For this reason, there is no contact of the laundry on the back side of the washing tub, and the portion facing the back side of the washing tub (between the outer peripheral surface of the washing tub and the inner peripheral surface of the water tub) has come out of the washing tub. Since the water containing the metal soap is accumulated, the above-described problem is likely to occur. Furthermore, the back side of the washing tub cannot be disassembled and cleaned by ordinary users, and moreover,
In the case where the washing tub is made of plastic, a large number of ribs are formed to provide strength, and the washing tub has a complicated uneven portion. For this reason, there is a tendency for metal soap to accumulate there, and for fiber dust and dirt to adhere thereto.

In addition, when clothes (clothing) are worn,
Many bacteria adhere from the human body or the outside air and remain on the laundry even after washing.If the laundry does not dry well, the remaining bacteria can propagate again, causing odor and yellowing. I was This is even more pronounced when the remaining water from the bath is used for washing.

On the other hand, it has been considered to supply an antibacterial liquid drug such as a quaternary amine into the washing tub through a water supply path for supplying water into the washing tub. In this product, the proliferation of microorganisms can be suppressed by the antibacterial action of the supplied drug, that is, bacteria can be eliminated, mold and
Odor and yellowing can be prevented.

[0007]

However, if the above-mentioned chemicals remain in the laundry, there is a concern that the user wearing the chemicals may cause allergies and the like, and it is necessary to carry out a rinsing process with clean water containing no such chemicals. Was. For this reason, a mechanism for restricting the introduction of the medicine is required in the water supply path, and the mechanism is complicated.

[0008] The present invention has been made in view of the above-mentioned circumstances, and therefore, its purpose is to not only remove bacteria,
It is to provide a washing machine that can be performed without complicating the mechanism.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above object, a washing machine of the present invention firstly supplies water to a washing tub for washing, and the washing machine is in contact with washing water in the washing tub. The present invention is characterized in that an installation part capable of installing a triclosan solid at a position where the solid is placed is provided (the invention of claim 1). According to this, triclosan elutes when the washing water in the washing tub comes into contact with the triclosan solid installed in the installation section, and the triclosan is contained in the washing water to remove bacteria.

Triclosan has a chemical name of 2,4,4'-
Trichloro-2'-hydroxydiphenyl ether,
It has a broad antibacterial spectrum that is effective against various kinds of bacteria, and is used as a germicidal disinfectant for hands, medicated soaps, deodorants, cosmetics, and the like. And it is not irritating to the skin and mucous membranes and is highly safe for the human body and clothing.

The solubility of triclosan in water is very small, about 0.001 [%], and it is very hard to dissolve. Even if it is always in contact with water, it does not elute in large quantities at once. The density can be maintained at a predetermined level or less without special control. Therefore, the triclosan solid may be provided at a position in contact with the washing water in the washing tub, and thus the bacteria can be removed without complicating the mechanism.

In this case, it is preferable that the triclosan solid is accommodated in a cassette case, and the cassette case is detachably attached to the installation portion (the invention of claim 2). In this case, when triclosan is no longer eluted, the cassette case can be removed from the installation section and replaced easily.

The cassette case preferably has an opening / closing means capable of opening / closing an outlet for taking out triclosan into the washing tub (the third aspect of the present invention). In this case, unnecessary dissolution of triclosan can be suppressed by closing the outlet of the cassette case when the sterilization action is not required.

Secondly, the washing machine of the present invention, in which washing is performed by supplying water into the washing tub, includes a circulation path for circulating the washing water in the washing tub, and triclosan solids are installed in the circulation path. The present invention is characterized in that an installation portion capable of performing the operation is provided. According to this method, triclosan is eluted by contacting the washing water passing through the circulation path with the triclosan solid provided in the circulation path, which is contained in the washing water to remove bacteria.

[0015] Even in this case, triclosan is repeatedly contacted with water, but is not eluted in large amounts at a time.
The density can be maintained at a predetermined level or less without special control. Therefore, even if the triclosan solid is installed in the circulation path, there is no problem and the bacteria can be removed without complicating the mechanism.

In this case, it is preferable that a lint filter is provided at the outlet of the circulation path facing the washing tub, and the lint filter is provided with a mounting portion (the invention of claim 5). In this case, the triclosan solid can be installed using a lint filter that captures lint from the washing water passing through the circulation path.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. First, FIG. 1 shows the entire configuration of a washing machine, especially a fully automatic dehydrating / washing machine, in which an outer tub 2 functioning as a water tub is elastically supported by an elastic support mechanism 3 inside an outer box 1. It is arranged.

Inside the outer tub 2, an inner tub 4 is rotatably arranged. The inner tub 4 is a washing tub and also a dehydration tub, and has an inner peripheral portion. A large number of dehydration holes 6 are provided in almost the entire area of the cylindrical inner cover 5 (only a part is shown), and a liquid-sealed rotary balancer 7 is mounted on the upper edge. A stirring body 8 for washing is rotatably disposed at a lower portion in the inner tub 4, and a ring-shaped inner bottom plate 9 is attached to the inner cover 5 so as to be positioned around the stirring body 8. . The lower end of the inner cover 5 is fixed to the bottom of the inner tank 4.

A drive mechanism 10 is arranged below the outer tub 2 and has a motor 11 of an outer rotor type and a direct drive type as a drive source. It has a clutch mechanism and the like. The agitator 8 is driven to rotate forward and reverse during the washing and rinsing steps, and the inner tub 4 is driven to rotate in one direction at high speed during the dewatering step.

A drain valve 13 communicating with a drain port 12 formed at the bottom of the outer tank 2 and a drain hose 14 communicating with the drain valve 13 are provided below the outer tank 2. Furthermore,
An air trap 1 is provided in a portion of the outer tank 2 adjacent to the drain port 12.
5, an air tube 16 is connected to the air trap 15, a water level sensor (not shown) is connected to the air tube 16, and the water level sensor is connected to the air tube 15 via the air trap 15 and the air tube 16. The water level in the tank 2 is detected.

On the other hand, a top cover 1
The top cover 17 is provided with a lid 18. The lid 18 is attached to the top cover 17 so that laundry (not shown) can be taken in and out of the inner tub 4 as shown in FIG.
The opening and closing of the entrance 19 formed as shown in FIG. 3 is configured such that when opened, the rear part 18a and the front part 18b are folded in two.

An operation panel 20 is provided on the top surface of the foremost part of the top cover 17. This operation panel 20
It is used to perform various operations related to the operation of the washing machine, and has a large number of operation units 21 and display units 22. Further, a control device 23 shown in FIG. 1 is disposed inside the forefront of the top cover 17, and the control device 23 is composed of, for example, a microcomputer, and serves as control means for controlling the operation of the washing machine. It is working.

Although not shown, the top cover 17 is not shown.
A water supply device for supplying water into the inner tank 4 is provided inside the rearmost part of the tank. This water supply device has a water supply valve for supplying tap water into the inner tank 4 and a pump for supplying bath water, and the tap water and bath water are operated based on the operation of the operation unit 21. The water is selectively supplied as washing water.

FIG. 3 shows a cassette case 24 containing triclosan solids. The cassette case 24 is formed of, for example, a plastic box having a substantially rectangular parallelepiped shape, and has insertion legs 25 protruding from left and right sides of a lower edge portion as attachment portions, respectively, and is engaged with a center of an upper edge portion. A dovetail 26 is provided. Also, this cassette case 24
In the front wall portion 24a, a plurality of (three in the illustrated example) through holes 27 that pass through the inside and outside of the cassette case 24 are formed in a vertically elongated slit shape, and the back wall portion 24b is shown in FIG. As described above, the flange 28 protruding vertically and horizontally is also formed in a curved shape. In this case, the curvature matches the curvature of the ring shape of the inner bottom plate 9.

In this case, the triclosan solid 29 stored in the cassette case 24 is formed by compressing the triclosan powder 29a shown in FIG. 5A to form a tablet as shown in FIG. 5B. , Thereby suppressing the outflow to the outside of the cassette case 24. However, the compression is not limited to simple compression.
Compression with heating, that is, heating and compression may be performed.

FIGS. 6 and 7 show a bag 30 containing the above-mentioned triclosan solid 29 formed into a tablet shape. The bag 30 is made of a mesh whose eyes are sufficiently smaller than the triclosan solid 29, and seals the opening (in this case, at both left and right ends). As for the bag 30, it is only necessary that the bag 30 has appropriate water permeability.
In addition to the mesh, a nonwoven fabric or the like can be used. Although the material is not specified, when the seal 31 is heat-sealed, a polyolefin-based synthetic resin such as polypropylene is suitable. Then, the triclosan solid 29 stored in the bag 30 is stored in the cassette case 24 together with the bag 30 (see FIG. 4).

On the other hand, the back wall 24b of the cassette case 24
Although not shown, the insertion leg 25 is provided at one location 9a shown in FIG. 8 and FIG.
And an engagement receiving hole corresponding to the engaging claw 26, the insertion leg 25 is inserted into one of the insertion receiving holes, and then the engagement leg is inserted into the engagement receiving hole. The cassette case 24 is detachably attached to the inner bottom plate 9 inside the one place 9a by inserting and engaging the engagement claws 26.

In this case, one location 9a of the inner bottom plate 9 to which the cassette case 24 is attached is a lower portion, especially a bottom portion, in the inner tank 4, and the control device 23 further detects the detection result of the water level sensor. It is a position lower than the lowest water level among the prescribed water levels in the inner tank 4 determined based on the above, and is also a position where the water flow generated by the stirring body 8 acts strongly. Thus, the triclosan solid 29 is installed at a position in contact with the washing water in the inner tub 4, and therefore, the one place 9a of the inner bottom plate 9 functions as an installation part for installing the same. .

Now, in the case of the configuration as described above,
When the operation of the washing machine is started, in the washing step and the rinsing step, the washing water is supplied and stored in the inner tub 4, so that the washing water is installed at the one place 9 a (installation portion) of the inner bottom plate 9. The triclosan solid 29 is immersed in the stored washing water. In particular, in the above configuration, since the one place 9a of the inner bottom plate 9 is located at a position lower than the lowest water level in the specified water level in the inner tank 4, the triclosan solid 29 is
It will always be immersed in the stored washing water.

Thus, the triclosan solid 2
If 9 is immersed in the washing water in the inner tub 4, the washing water comes into contact with the triclosan solid 29, and in particular, in the case of the above-described configuration, it passes through the opening 27 of the cassette case 24 as shown by an arrow in FIG. 4. The washing water entering the cassette case 24 comes into contact. When the washing water comes in contact with the triclosan solid 29 in this manner, the triclosan is dissolved in the washing water from the triclosan solid 29, and the solution is transferred to the cassette case 24.
4 also passes through as shown by an arrow in FIG.

Thus, the washing water in the inner tub 4 contains triclosan, and the triclosan touches the laundry, the inner and outer surfaces of the inner tub 4, the inner and outer surfaces of the inner cover 5, the upper and lower surfaces of the stirrer 8, and the outer and inner surfaces. The inner surface of the tank 2 is disinfected.

Here, triclosan has a chemical name of 2,
4,4'-trichloro-2'-hydroxydiphenyl ether, represented by the following chemical formula, has a wide antibacterial spectrum, is effective against various kinds of bacteria, has a germicidal antiseptic for hands, and a medicated soap. , Deodorants, cosmetics, etc.

[0033]

Embedded image

This triclosan is not irritating to the skin and mucous membranes and is highly safe for the human body and clothing.
The solubility of triclosan in water is about 0.001.
[%] Is very small and very insoluble.
Even if it is in constant contact with water, it does not elute in large quantities at a time, and can be maintained at a predetermined concentration or less without special control. Therefore, the triclosan solid 29 may be installed at the position where it comes into contact with the washing water in the inner tub 4 as described above, and thus, there is no need for a mechanism or the like required for restricting the introduction of the conventional medicine. Can be removed without complicating the process.

In this case, an alkaline agent was added to the detergent to be introduced into the inner tank 4 during the washing process (the solution had a pH of 10).
Synthetic detergents may be used in some cases.) When triclosan is alkaline, its solubility in water increases. When a synthetic detergent containing the alkaline agent is used, triclosan acts in a high concentration state. Can be done. In particular, the washing process using the detergent
Since bacteria and dirt are the most abundant and the contact time between the washing water and the laundry is long, the bacteria can be effectively removed, which is preferable.

In the experiment, the shirt actually worn was washed in the washing machine provided with the triclosan solid 29 as in the above-described embodiment, and the same washing was performed in the washing machine not provided with the triclosan solid 29. After completion of each washing, the shirts were cut out in a predetermined area, immersed in sterilized water, stirred to shake out the adherent bacteria, cultured using a standard agar medium, and cultured by a plate dilution method, and the number of colonies was counted and compared. However, the number of colonies in the case where the triclosan solid 29 was provided was far smaller than the number of colonies in the case where the triclosan solid 29 was not provided, and the eradication effect was actually observed.

After washing the actually worn shirt for a long period of time, the inner tub 4 was taken out, and the degree of contamination of the inner tub 4 and the outer tub 2 was examined. In the case where the triclosan solid 29 was not installed, mold was generated outside the inner tank 4 and the inside (in particular, the bottom) of the outer tank 2. In the case where the triclosan solid 29 was installed, the mold was not generated. Did not.

In addition, in the case of the above configuration, the triclosan solid 29 is housed in the cassette case 24, and the cassette case 24 is detachably attached to one place 9a (installation portion) of the inner bottom plate 9. In this case, when the triclosan is no longer eluted due to long-term use, the cassette case 24 is removed from the installation portion and replaced with a cassette case 24 containing a new triclosan solid 29, whereby the replacement can be facilitated.

9 to 16 show the second to sixth embodiments of the present invention.
The same parts as those in the embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.

[Second Embodiment] In the second embodiment shown in FIG. 9, the opening 32 of the cassette case 24 is replaced with the above-described opening 27, and the left and right side wall portions 24 of the cassette case 24 are replaced.
c, 24d. Also in this case, it is possible to secure the entrance and exit of the washing water to and from the cassette case 24 in which the triclosan solid 29 is stored. In this case, the entrance and exit of the water flow generated by the agitating body 8 are formed in the through-hole 3.
2 can be done smoothly.

[Third Embodiment] In the third embodiment shown in FIG. 10, the opening 33 of the cassette case 24 is formed in the front wall portion 24a of the cassette case 24 so as to be larger than the above-mentioned opening 27 and to be formed in one. Then, a water-permeable strainer 34 is stretched over this, and the triclosan solid 29 is stored directly (without being stored in the bag 30 described above) on the back side of the strainer 34, that is, inside the cassette case 24. I have. Also in this case, it is possible to secure the entrance and exit of the washing water with respect to the inside of the cassette case 24 and the triclosan solid 29 stored therein by the opening 33 and the strainer 34.

[Fourth Embodiment] In the fourth embodiment shown in FIG. 11, a cassette case 35 having a thickness larger than that of the above-mentioned cassette case 24 is used, A position within 35,
A water-permeable strainer 37 is stretched at the position separating the space 36), and the triclosan solid 29 is stored directly behind the strainer 37. Even in this case, the triclosan solid 29 contained in the cassette case 24 and stored therein.
Can be secured by the entrance 27, the space 36, and the strainer 37 of the washing water.

[Fifth Embodiment] In the fifth embodiment shown in FIGS. 12 and 13, the cassette case 24 is an inlet for washing water and an outlet for discharging triclosan into the washing tub. A strainer 38 is stretched over the shutter 27 and a shutter 39 having a slit-like opening 39a similar to the through-hole 27 is reciprocated at a position on the back side of the through-hole 27 in a direction in which the openings 39a are arranged (in this case, left and right). It is assembled so that it can be moved.

In this case, by moving the shutter 39 as shown by arrows in FIGS. 12 and 13, the slit-like opening 39a of the shutter 39 matches the opening 27 (FIG. 12) or shifts (FIG. 12). 13) The opening 27 can be opened and closed.
Reference numeral 9 functions as opening / closing means for opening / closing a passage 27 (an outlet for taking out triclosan into the washing tub) of the cassette case 24. In this case, when the disinfection action is not required, unnecessary elution of triclosan can be suppressed by closing the opening 27 of the cassette case 24.

Sixth Embodiment In a sixth embodiment shown in FIGS. 14 to 16, a water passage 40 (see FIG. 16) is formed in the upper part of the peripheral side of the inner tank 4, and the water passage 40 is A lint filter 41 is mounted. This lint filter 41
Is formed by connecting a filter body 43 having a water-permeable bag shape with an opening 43 a to a mounting frame 42 having a rectangular shape, for example. The filter frame 43 is detachably attached to the water inlet 40 of the inner tank 4 by the mounting frame 42. I am wearing it. In this case, the lint filter 41
Inside the mounting frame 42, a strainer 44 is stretched in a tubular shape almost in communication with the mouth 43a of the filter body 43, and the triclosan solid 29 is directly stored outside the strainer 44.

Further, in this case, a pump blade 45 is formed on the lower surface of the stirring body 8, and the stirring body 8 is rotated while the washing water is stored in the inner tub 4 so that the inner tub 4 is rotated. At the same time as the laundry and the washing water in the inside are agitated, the pump blades 45 pass the washing water in the inner tub 4 between the inner tub 4 and the outer tub 2 as shown by arrows in FIG. From the water inlet 40 to the inside of the mounting frame 42 of the lint filter 41 and the filter body 4
Through 3, return circulation into the inner tank 4 is performed.

Therefore, in this case, in the inner tank 4-the inner and outer tanks 4,
Between the two, the water inlet 40, and the inside of the inner tub 4, a circulation path 46 for circulating the washing water in the inner tub 4 is formed.
There is an interior of a lint filter 41 (mounting frame 42) as an installation section for installing the triclosan solid 29 in the apparatus.
In addition, the lint filter 41 captures lint (lint) from the washing water passing through the circulation path 46 by the filter body 43. According to this filter, the washing water passing through the circulation path 46 is removed from the washing water. Triclosan is eluted by contacting and passing through the strainer 44 to the triclosan solid 29 installed in the washing machine, and this triclosan is contained in the washing water to remove bacteria as described above.

In this case, too, triclosan repeatedly comes into contact with water, but does not elute in large amounts at a time.
The density can be maintained at a predetermined level or less without special control. Therefore, even if the triclosan solid 29 is installed in the circulation path 46, there is no problem. Thus, as described above, the bacteria can be removed without complicating the mechanism.

Further, in this case, the circulation path 4 facing the inner tank 4
A lint filter 41 is provided at the water inlet 40, which is the outlet of 6, and an installation section for installing the triclosan solid 29 is provided in the lint filter 41 (mounting frame 42). In this apparatus, a triclosan solid can be installed using a lint filter 41 that captures lint contained in the washing water passing through the circulation path 46, and a special installation location,
This can be performed without the need to provide an installation tool or the like.

It should be noted that the triclosan solid 29 may be placed in the form of a powder without being formed into a tablet as long as it can prevent the triclosan solid 29 from flowing out into the washing water as it is. The triclosan solid 29 may be molded by mixing a known binder in order to improve the moldability and more surely maintain the shape.

Further, the triclosan solid 29 has a melting point of 5
5 to 57 [° C.], and even if it is molded into a predetermined shape, there is a possibility that it will melt when hot washing water comes in contact, so it has a mechanism to shut off contact with water when the high temperature is detected. It is good to do. In this case, a temperature detecting means such as a thermistor is provided on the outer surface or inner surface of the inner tank 4 or the circulation path 46, and when a preset temperature of, for example, 50 ° C. or more is detected, the shutter 39 or the circulation By closing the opening / closing means provided in the passage 46, contact of the high-temperature washing water with the triclosan solid 29 is avoided, and melting of the washing water is prevented.

In addition, the present invention is not limited to the embodiment described above and shown in the drawings, but can be implemented with appropriate modifications without departing from the scope of the invention.

[0053]

As described above, according to the present invention,
It has an excellent effect that it can not only remove bacteria from a laundry or a washing tub, but also do so without complicating the mechanism.

[Brief description of the drawings]

FIG. 1 is an overall cutaway side view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of the entire lid opened state.

FIG. 3 is an enlarged perspective view of a cassette case containing a triclosan solid.

FIG. 4 is a cross-sectional view taken along line AA of FIG. 3;

FIG. 5 is a view showing a molding process of a triclosan solid.

FIG. 6 is a perspective view of a bag containing a triclosan solid.

FIG. 7 is a longitudinal sectional view of a bag containing a solid triclosan.

FIG. 8 is a partial perspective view of an installation section where a triclosan solid is installed.

FIG. 9 is a view corresponding to FIG. 4, showing a second embodiment of the present invention.

FIG. 10 is a view corresponding to FIG. 4, showing a third embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 4, showing a fourth embodiment of the present invention;

FIG. 12 is a view corresponding to FIG. 4, showing a fifth embodiment of the present invention.

FIG. 13 is a view corresponding to FIG. 4 in a different state.

FIG. 14 is a reduced view corresponding to FIG. 1, showing a sixth embodiment of the present invention.

FIG. 15 is a perspective view of a main part.

FIG. 16 is an enlarged cross-sectional view taken along the line BB of FIG. 15;

[Explanation of symbols]

4 is an inner tub (washing tub), 9a is one place of the inner bottom plate (installation portion), 24 is a cassette case, 27 is a through hole (exit), 2
9 is a triclosan solid, 39 is a shutter (opening / closing means),
41 is a lint filter, 42 is a lint filter mounting frame (installation portion), and 46 is a circulation path.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinichiro Kawabata 991, Anata-cho, Seto-shi, Aichi Prefecture Inside the Higashishiba Aichi Factory (72) Inventor Michiaki Ito 991, Anata-cho, Seto-shi, Aichi Prefecture Higashishiba Aichi Factory F term (reference) 3B155 AA01 AA15 AA19 AA21 BA02 CB32 CB35 CD11 FE16 GA27 MA01 MA02 4H011 AA02 BB03 DA01

Claims (5)

[Claims] 1. A washing machine in which water is supplied into a washing tub for washing, the washing machine further comprising an installation portion capable of installing a triclosan solid at a position in contact with the washing water in the washing tub. Machine. 2. The washing machine according to claim 1, wherein the triclosan solid is stored in a cassette case, and the cassette case is detachably attached to an installation portion. 3. The washing machine according to claim 2, wherein the cassette case has opening / closing means for opening / closing an outlet for taking out triclosan into the washing tub. 4. A washing machine for supplying water to a washing tub for washing, comprising a circulation path for circulating washing water in the washing tub, and an installation part capable of installing a triclosan solid in the circulation path. A washing machine characterized in that: 5. The washing machine according to claim 4, wherein a lint filter is provided at an outlet of the circulation path facing the washing tub, and the lint filter is provided with an installation portion.