JP2010136739A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide wide sterilization effects against bacteria and fungus by efficiently generating active oxygen species generated by an optical excitation action, thereby decomposing and killing the fungus. <P>SOLUTION: The washing machine includes: a washing tub 3 for housing laundry; an antibacterial agent generation portion 14 which elutes silver ions 28 and adding them to water; a detergent case 16 for supplying detergent 15 to the washing tub 3; and an LED 5. In a rinsing step, the silver oxide 29 of an inorganic antibacterial compound with the optical excitation effect is formed by eluting the silver ion 28 and a fine amount of the detergent 15 and making them react, and light is emitted from the LED 5 to the laundry containing the water to which the silver oxide 29 is added. Thus, the silver oxide 29 is easily excited by the light and more active oxygen species, such as hydroxyl radical, are continuously generated as catalysts. Consequently, bacteria and molds on the laundry are effectively removed by oxidative decomposition by the active oxygen species. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a washing machine for sterilizing bacteria attached to laundry to be washed in a washing machine.

  Conventionally, as a washing machine for sterilizing laundry, there is a technique using silver having antibacterial properties (see, for example, Patent Document 1).

  FIG. 4 shows a cross-sectional view of the washing machine described in the publication. As shown in FIG. 4, tap water supplied from a water tap (not shown) is introduced into the washing machine and reaches the branching unit 111. In the branching part 111, it branches into the raw | natural water flow path 112 for supplying raw water (tap water) directly to the washing tub 113, and the branch flow path 114 for supplying water to the washing tub 113 through the silver elution cartridge 115. Yes.

  The branch portion 111 incorporates an electromagnetic valve, and can stop the raw water or automatically switch the water flow path to the raw water flow path 112 or the branch flow path 114.

  Next, the operation will be described. In the washing rinsing process, tap water is supplied to the washing tub 113 to perform rinsing, and then the rinsing water is drained and dehydrated. This rinsing step is performed once or a plurality of times. In at least the final step of this rinsing step, the electromagnetic valve of the branching part 111 is switched, the raw water channel 112 side is closed and the branch channel 114 side is opened, and tap water is passed from the branch channel 114 through the silver elution cartridge 115. Supply to washing tub 113. At this time, silver is eluted from the silver elution cartridge 115 into the tap water supplied to the washing tub 113, and silver-containing water is supplied into the washing tub 113. After the final rinsing process is completed, dehydration is performed and washing is completed.

  Here, since the rinsing water contains silver having a high antibacterial action, it is possible to prevent germs from propagating in the laundry to which the silver has adhered and the generation of a strange odor. As described above, there is a technique for removing bacteria adhering to the laundry by containing silver in the rinse water of the washing machine.

  On the other hand, there is a technique of an antibacterial active metal-containing acrylonitrile fiber that can enhance antibacterial properties by light irradiation (see, for example, Patent Document 2).

  100 g of acrylonitrile fiber was put into a solution adjusted to pH 3 with 1% nitric acid aqueous solution of 1000 mL of silver nitrate aqueous solution adjusted to 20 m · mol / L, treated at 98 ° C. for 10 minutes, washed with water and dried, then 10 m · The solution was added to 1000 mL of an aqueous sodium oxalate solution adjusted to mol / L, treated at 98 ° C. for 10 minutes, washed with water, and dried to produce an antibacterial active metal-containing acrylonitrile fiber.

The antibacterial activity metal-containing acrylonitrile fiber thus obtained was evaluated for antibacterial performance under silver ion content, light irradiation and dark room. When the silver ion content was 42 mmol / kg, the residual viable cell rate difference was 1.8 under dark room conditions and under light irradiation, and antibacterial performance was improved by photocatalytic activity under light irradiation. As described above, there is also a technique for improving antibacterial performance by photocatalytic activity by irradiating light to acrylonitrile fiber containing antibacterial silver ions.
JP 2002-113288 A JP 2001-89968 A

  However, in the configuration of the conventional washing machine, the number of bacteria attached to the laundry can be reduced by silver ions, but a high concentration of silver ions is required. Moreover, it was difficult to kill fungi other than bacteria with silver ions.

  The antibacterial active metal-containing acrylonitrile fiber is a fiber product in which silver ions are contained in the fiber, and the antibacterial performance of the fiber is improved by photocatalytic activity of silver ions by light irradiation. However, since silver ions are irradiated here, the reaction caused by light irradiation is transient, and the reaction does not proceed continuously as a catalyst. Therefore, the amount of active oxygen species generated by photocatalytic activity during light irradiation to silver ions is small, and when this technology is applied to a washing machine, fungi attached to the laundry are killed by the generated active oxygen species. There was a problem that it was difficult.

  The present invention solves the above-mentioned conventional problems, and efficiently generates reactive oxygen species generated by the photoexcitation action of silver, thereby decomposing and killing the fungus, thereby widely removing bacteria and fungi. It is an object of the present invention to provide a washing machine that exhibits a microbial effect and can obtain a sterilizing effect even with a low concentration of an antibacterial agent.

  In order to solve the above-mentioned problems, the washing machine of the present invention throws a laundry tub for storing laundry, an antibacterial agent generating part for eluting inorganic antibacterial substances into water, and a detergent into the washing tub. A detergent case and a light irradiation means are provided, and in the rinsing step, an inorganic antibacterial compound having a photoexcitation action is formed by eluting and reacting with the inorganic antibacterial substance and a small amount of detergent, and this inorganic antibacterial compound By irradiating the laundry containing water added with light from the light irradiating means, the rinse is weakly alkaline because the detergent is dissolved, and hydroxide ions are generated.

  This reacts with the inorganic antibacterial substance to produce an inorganic oxide having a high photoexcitation effect. For this reason, inorganic oxide adheres to the laundry contained in the washing tub, and when irradiated with light, the excited inorganic oxide reacts with water, and active oxygen such as hydroxy radicals having high oxidizing power by photocatalysis. More seeds are generated. Therefore, the bacteria and molds on the laundry can be removed by decomposing the attached bacteria and molds by the oxidizing action of the generated active oxygen species.

  The washing machine of the present invention efficiently generates active oxygen species generated by the photoexcitation action of silver, thereby decomposing and killing the fungus, thereby showing a broad sterilization effect against bacteria and fungi, low concentration The antibacterial effect can be obtained even with this antibacterial agent.

  The first invention includes a washing tub for storing laundry, an antibacterial agent generating section for eluting inorganic antibacterial substances and adding them to water, a detergent case for introducing a detergent into the washing tub, and a light irradiation means. In the rinsing step, the inorganic antibacterial substance and a small amount of detergent are eluted and reacted to form an inorganic antibacterial compound having a photoexcitation effect, and the laundry contains water to which the inorganic antibacterial compound is added. By irradiating the object with light from the light irradiating means, rinsing water becomes weakly alkaline due to dissolution of the detergent, and generates hydroxide ions. This reacts with the inorganic antibacterial substance to produce an inorganic oxide having a high photoexcitation effect. For this reason, inorganic oxide adheres to the laundry contained in the washing tub, and when irradiated with light, the excited inorganic oxide reacts with water, and active oxygen such as hydroxy radicals having high oxidizing power by photocatalysis. More seeds are generated. Therefore, the bacteria and molds on the laundry can be removed by decomposing the attached bacteria and molds by the oxidizing action of the generated active oxygen species.

  In particular, in the detergent case of the first invention, the second invention stores the first detergent reservoir for storing the detergent used in the washing process, and the minute amount of detergent put into the washing tub in the rinsing process. (2) By providing a detergent reservoir, the washing machine user can form an inorganic antibacterial compound with a high photoexcitation effect in a normal operation in which a detergent necessary for washing is put into the detergent case. Necessary trace amount of detergent can be easily supplied.

  In a third aspect of the invention, in particular, in the second aspect of the invention, a first water supply path for supplying water to the washing tub at the time of the washing process and a second water supply path for supplying water to the washing tub at the time of the rinsing process are provided. The water supplied from the first detergent reservoir passes through the first detergent reservoir, and during the rinsing process, the water supplied from the second water supply path passes through the second detergent reservoir and is supplied to the washing tub. Since only a small amount of detergent can be supplied to the washing tub, the inorganic antibacterial substance supplied in the rinsing process reacts with hydroxide ions generated from the trace amount of detergent to rinse the inorganic oxide with a high photoexcitation effect. Can be generated in the process.

  In a fourth aspect of the present invention, in particular, in the detergent case according to the third aspect of the present invention, a container is provided above the first detergent reservoir, and the second detergent reservoir is a part of a portion of the container, and the second Since the container bottom other than the detergent reservoir is configured to open, when the user of the washing machine puts in the detergent, the detergent can be accumulated in the second detergent reservoir simultaneously with the first detergent reservoir. A person can easily put in the detergent.

  In the fifth invention, in particular, the inorganic antibacterial substance of any one of the first to fourth inventions is a substance that generates silver ions, whereby hydroxide ions and silver ions generated from a small amount of detergent. Reacts to produce silver oxide having a high photoexcitation effect and adheres to the laundry. Silver oxide can generate more reactive oxygen species such as hydroxy radicals by light irradiation, and can further remove bacteria or fungi on the laundry. In addition, since the silver compound itself has antibacterial properties, it can decompose bacteria by the action of both the reactive oxygen species and the silver compound.

  In the sixth aspect of the invention, in particular, when the light irradiated from the light irradiation means of any one of the first to fifth aspects of the invention is an ultraviolet ray, when the inorganic antibacterial compound having a photoexcitation action is irradiated with light, Since the light energy is increased due to the short wavelength, the inorganic antibacterial compound is likely to be in an excited state and can generate more active oxygen species such as hydroxy radicals.

  The seventh aspect of the invention secures the light energy necessary to excite the inorganic antibacterial compound, in particular, by setting the wavelength that becomes the maximum light emission intensity of the light irradiation means of the sixth aspect of the invention to 365 nm to 400 nm. Since the light energy is not high enough to decompose the pigment, reactive oxygen species can be efficiently generated without fading and damaging the laundry.

  In the eighth invention, in particular, the light irradiating means of any one of the first to seventh inventions is a small light source due to the use of an LED, so that an installation space for the light irradiating means is secured. can do. Moreover, long-term durability of the light source can be ensured.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a cross-sectional view of the washing machine according to the first embodiment of the present invention.

  In FIG. 2, sectional drawing of the detergent case of the 1st Embodiment of this invention is shown.

  In FIG. 3, the principal part enlarged view of the antibacterial agent generation | occurrence | production part of the 1st Embodiment of this invention is shown.

  In FIG. 1, a washing machine body 1 includes an outer tub 2 and a rotating tub 3 that is rotatably disposed in the outer tub 2. The washing tub 3 is configured such that the washing tub 3 can be rotated by the motor 4.

  An LED, which is a light irradiating means 5, is disposed on the peripheral edge of the outer tub 2, and is installed in a direction in which light is applied to the laundry thrown into the laundry tub 3. The LED 5 has three LED elements with a wavelength of 395 nm and an output of 7 mW which are the maximum emission intensity. By using the LED as the light irradiation means, it can be installed even in a narrow space such as the outer tub 2 of the washing machine.

  One end of a drainage channel 6 is connected to the lower part of the outer tub 2, and a drain valve 7 is connected to the drainage channel 6 so as to drain the washing water in the outer tub 2.

  The washing tub 3 is formed in a bottomed cylindrical shape, and a large number of water passage holes communicating with the outer tub 2 are formed on the peripheral surface thereof, and baffles 8 are provided at a plurality of positions on the inner peripheral surface. A rotation axis is provided in a substantially inclined direction at the rotation center of the washing tub 3, and the axial center direction of the washing tub 3 is disposed to be inclined upward from the back side to the front side. A motor 4 attached to the back side of the outer tub 2 is connected to the rotating shaft so that the washing tub 3 is rotationally driven in the forward and reverse directions.

  The opening provided in the upward inclined surface on the front side of the outer tub 2 is covered with a lid 9 so that it can be opened and closed. By opening the lid 9, the laundry can be taken in and out of the laundry tub 3 through the laundry entrance. Since the lid 9 is provided on the inclined surface facing upward, the laundry can be taken in and out without bending, and in general, the workability of the washing machine for taking in and out the laundry from the side opening is improved. is doing.

  The water supply to the washing tub 3 is branched and provided with a first water supply path 10 used for water supply during the washing process and a second water supply path 11 used for water supply during the rinse process. The first water supply path 10 is opened and closed by a first water supply valve 12, and the second water supply path is opened and closed by a second water supply valve 13.

  The antibacterial agent generator 14 is provided in the middle of the second water supply path 11. And the detergent case 16 which throws the detergent 15 in at the downstream end of the 1st water supply path | route 10 and the 2nd water supply path | route 11 is provided.

  As shown in FIG. 2, a container 17 is provided in the detergent case 16 at a position away from the bottom of the detergent case 16, and a part of the container 17 other than a part for collecting the detergent 15 is When the water flows from the second water supply path 11, the detergent 15 opens to the bottom of the detergent case 16. Further, the bottom of the container 17 is a slope, and a partition 18 having a height of about 3 mm is provided. The bottom of the detergent case 16 serves as a first detergent reservoir 19 that accumulates the detergent 15 used in the washing process.

  In the bottom of the container 17, a portion that is partitioned by the partition 18 and can store a smaller amount of the detergent 15 than the first detergent reservoir 19 stores a small amount of detergent used in the rinsing process. This is the detergent reservoir 20.

  The outlet of the first water supply path 10 is arranged at the upper part of the first detergent reservoir 19 of the detergent case 16. The outlet of the second water supply path 11 is arranged at the upper part of the second detergent reservoir 20 of the container 17. The bottom of the detergent case 16 is open and communicates with a main water supply path 21 that is a water supply path to the washing tub 3.

In FIG. 3, the antibacterial agent generation unit 14 shows a configuration of a method for generating an antibacterial agent by electrolysis using a silver electrode. There are two silver plate electrodes 23 in the electrolytic cell 22, and a water inlet 24 is provided at one end in the longitudinal direction and a water outlet 25 is provided at the other end. A part of the silver plate electrode 23 is provided with a connection terminal 26 for applying a voltage. A control means 27 for applying a voltage to the silver plate electrode 23 is connected to the connection terminal 26.

  When a predetermined voltage is applied to the silver plate electrode 23 in a state where water is present in the electrolytic cell 22, silver ions of the inorganic antibacterial substance 28 are eluted from the anode side of the silver plate electrode 23. In the antibacterial agent generation unit 14, elution or non-elution of the silver ions 28 can be selected depending on whether a voltage is applied. Further, the elution amount of the silver ions 28 can be controlled by controlling the current and voltage application time. When a current is passed through the silver plate electrode 23 in one direction for a long time, the electrode on the anode side is depleted and impurities such as calcium in water are fixed as a scale on the electrode on the cathode side. Further, chlorides and sulfides of the component metals of the electrode are generated on the electrode surface. This causes a decrease in the performance of the antibacterial agent generation unit 14, so that the controller 27 can be operated by reversing the polarity of the electrodes.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the lid 9 is opened, the laundry is put into the washing tub 3, and a certain amount of the detergent 15 is put into the container 17 of the detergent case 16. At this time, a part of the detergent 15 is stored in the second detergent reservoir 20 of the container 17. A small amount of 1 g or less detergent is blocked by the partition 18, and the other detergent 15 is held in the first detergent reservoir 19 at the bottom of the detergent case 16 because the bottom of the container 17 is formed on the slope. .

  When the detergent has been put into the detergent case 16 and the operation of the washing machine body 1 is started, the washing process of the laundry starts.

  First, when the first water supply valve 12 is opened, water passes through the first water supply path 10 and water is supplied to the detergent case 16. Then, water flows into the first detergent reservoir 19 of the detergent case 16. Then, the detergent 15 stored in the first detergent reservoir 19 is pushed away, and water containing the detergent 15 is poured into the outer tub 2 through the main water supply path 21.

  Thereafter, the washing tub 3 is rotationally driven by the motor 4 and the washing process is started.

  By the rotation of the washing tub 3, the laundry stored in the washing tub 3 is lifted in the rotation direction by the baffle 8 provided on the inner peripheral surface of the washing tub 3, and agitated by dropping from the raised appropriate height position. Since the operation is repeated, the laundry has the effect of tapping and washing the dirt. After the required washing time, the drain valve 7 is opened and the dirty washing liquid is discharged from the drain 6 and the detergent liquid contained in the laundry is dehydrated by a dehydrating operation that rotates the washing tub 3 at a high speed.

  Next, the rinsing process starts. When the second water supply valve 13 is opened, water flows into the second water supply path 11, and water flows into the electrolytic cell 22 from the inlet 24 of the antibacterial agent generator 14. Then, the silver plate electrode 23 in the electrolytic cell 22 of the antibacterial agent generator 14 is energized from the control means 27 and a constant current flows. Thereby, silver ions of the inorganic antibacterial substance 28 are eluted from the silver plate electrode 23. Then, water containing the eluted silver ions 28 flows out from the outlet 25. And the silver ion 28 produced | generated by the antibacterial agent generation | occurrence | production part 14 flows in into the detergent case 16 through the 2nd water supply path | route 11. As shown in FIG.

  The water supplied to the detergent case 16 through the second water supply path 11 is supplied to the container 17. Then, a small amount of detergent 15 stored in the second detergent reservoir 20 of the container 17 and less than the detergent accumulated in the first detergent reservoir is swept away.

Here, since the detergent 15 contains a sodium compound such as sodium carbonate, when dissolved in water, the water exhibits weak alkalinity and generates hydroxide ions. And this hydroxide ion and the silver ion 28 produced | generated in the antibacterial agent generation | occurrence | production part 14 combine, and produce | generate silver hydroxide. And since the produced | generated silver hydroxide is an unstable substance, it changes to silver oxide immediately. Silver oxide is an inorganic antibacterial compound 29 having a high photoexcitation effect. Then, the water added with the silver oxide 29 is supplied to the outer tub 2.

  Here, the antibacterial agent generating part 14 and the detergent case 16 are arranged in series in the second water supply path 11, and the antibacterial agent generating part 14 is provided upstream of the detergent case 16, so that the silver oxide is supplied to the washing tub 3. Since the silver ions 28 eluted by the antibacterial agent generation part 14 pass through the detergent case 16 regardless of the charging timing when the 29 is introduced, the eluted silver ions 28 are not reacted and the detergent 15 is removed in the detergent case 16. It reacts with the hydroxide ions generated by elution and can be put into the outer tank 2 as silver oxide 29.

  Further, since the detergent 15 stored in the second detergent reservoir 20 is a minute amount of 1 g or less, the influence on the laundry detergent remaining after washing is small.

  After a certain amount of water containing silver oxide 25 is supplied to the outer tub 2, the rinsing process starts. Simultaneously with water supply to the outer tub 2, ultraviolet light having a wavelength of 395 nm is irradiated from the LED 5 to the laundry housed in the laundry tub 3.

  In the rinsing process, the laundry stored in the washing tub 3 is rinsed by repeating the stirring operation of being lifted and dropped by the baffle 8 by the rotation of the washing tub 3. For this reason, the silver oxide 29 adheres to the whole laundry through the rinsing water.

  When the silver oxide 29 attached to the laundry is irradiated with light, the silver oxide 29 enters an excited state and reacts with water to generate active oxygen species such as hydroxy radicals and superoxide anions.

  Then, bacteria and fungi attached to the laundry can be decomposed by the oxidative decomposition action of these active oxygen species and the antibacterial action of the silver oxide 29 to remove the bacteria and mold on the laundry.

  Here, since it is not silver in an ionic state but silver oxide 29 in an oxide state that adheres to the laundry, the reaction due to light irradiation is not a transient thing, and the reaction is continuous as a catalyst. move on. Therefore, the amount of active oxygen species generated when irradiated with light is greater than that of silver ions. Thereby, the killing of the fungi by the active oxygen species can be improved, and the bacteria on the laundry can be removed with a low concentration of the inorganic antibacterial substance.

  Here, since the LED 5 uses light in the ultraviolet region with a wavelength of 395 nm, when the silver oxide 29 is irradiated with light, the light energy increases due to the short wavelength of the light, so the silver oxide 29 is likely to be in an excited state. More active oxygen species such as hydroxy radicals can be generated. In addition, since near ultraviolet rays are used, the laundry does not have enough energy to discolor the laundry, so the laundry is not damaged.

  The same effect can be obtained if the wavelength of the LED 5 is in the region of 365 nm to 400 nm.

  Thus, after rinsing with water to which silver oxide 29 has been added for a certain period of time while being irradiated with light from the LED 5, the rinsing water is discharged from the drainage channel 6.

Next, the dehydration process starts. The washing tub 3 rotates at a high speed, and the rinsing liquid contained in the laundry is dehydrated. Also in this process, the laundry is irradiated with light from the LED 5, and active oxygen species such as hydroxy radicals are generated from the attached silver oxide 29, thereby killing bacteria and fungi on the laundry being dehydrated. it can.

  As described above, in the present embodiment, the washing tub 3 for storing the laundry, the antibacterial agent generator 14 for eluting the silver ions 28 and adding them to the water, and the detergent for putting the detergent 15 into the washing tub 3. The case 16 and the LED 5 are provided, and in the rinsing step, silver ions 28 and a small amount of detergent 15 are eluted and reacted to form a silver oxide 29 of an inorganic antibacterial compound having a photoexcitation action. By irradiating the laundry containing the added water with light from the LED 5, the silver oxide 29 is easily excited by the light and continuously generates more active oxygen species such as hydroxy radicals as a catalyst. Can do. Therefore, bacteria and mold on the laundry can be removed by further decomposing the attached bacteria and mold by oxidative degradation by the generated active oxygen species together with the antibacterial action by silver. As a result, bacteria and fungi on the laundry can be removed even with a low concentration of silver.

  In addition, even when the inorganic antibacterial substance 28 of the present embodiment is used as copper ions and copper oxide is generated and applied to the inorganic antibacterial compound 29, reactive oxygen species are generated by photoexcitation to decompose bacteria and fungi. Can be removed. In this case, however, the required concentration of the inorganic antibacterial substance 28 is higher than that of silver ions.

  In the washing machine of the present invention, in the rinsing process, the inorganic antibacterial substance and a small amount of detergent are eluted and reacted to form an inorganic antibacterial compound having a photoexcitation action, and the inorganic antibacterial compound is added. By irradiating the laundry containing water with light from the light irradiating means, the detergent is dissolved, so that the rinse water becomes weakly alkaline and generates hydroxide ions. This reacts with the inorganic antibacterial substance to produce an inorganic oxide having a high photoexcitation effect. For this reason, inorganic oxide adheres to the laundry contained in the washing tub, and when irradiated with light, the excited inorganic oxide reacts with water, and active oxygen such as hydroxy radicals having high oxidizing power by photocatalysis. More seeds are generated. Therefore, it is possible to decompose bacteria and mold on the laundry by oxidizing the generated active oxygen species to remove bacteria and mold on the laundry. it can.

Sectional drawing of the washing machine in Embodiment 1 of this invention Sectional drawing of the detergent case of Embodiment 1 of this invention Sectional drawing of the antibacterial agent generation | occurrence | production part of Embodiment 1 of this invention Cross section of a conventional washing machine

Explanation of symbols

3 Washing tank 4 Motor 5 LED (light irradiation means)
DESCRIPTION OF SYMBOLS 10 1st water supply path 11 2nd water supply path 12 1st water supply valve 13 2nd water supply valve 14 Antibacterial agent generation | occurrence | production part 15 Detergent 16 Detergent case 17 Container 18 Partition 19 First detergent reservoir 20 Second detergent reservoir 28 Inorganic antibacterial Substance 29 Inorganic antibacterial compounds

Claims (8)

In a rinsing step, a washing tub for storing laundry, an antibacterial agent generating section for eluting inorganic antibacterial substances and adding to water, a detergent case for putting detergent into the washing tub, and a light irradiation means, The inorganic antibacterial substance and a small amount of detergent are eluted and reacted to form an inorganic antibacterial compound having a photoexcitation action, and the light irradiation means is applied to the laundry containing water to which the inorganic antibacterial compound is added. A washing machine that emits light from The detergent case is provided with a first detergent reservoir for storing a detergent used in the washing process and a second detergent reservoir for storing a small amount of detergent to be put into the washing tub in the rinsing process. The washing machine described. A first water supply path for supplying water to the washing tub during the washing process and a second water supply path for supplying water to the washing tub during the rinsing process are provided, and water supplied from the first water supply path passes through the first detergent reservoir during the washing process. The washing machine according to claim 2, wherein water supplied from the second water supply path passes through the second detergent reservoir and is supplied to the washing tub during the rinsing step. In the detergent case, a container is provided above the first detergent reservoir, the second detergent reservoir is a part of the container, and the bottom of the container other than the second detergent reservoir is open. The washing machine according to claim 3. The washing machine according to any one of claims 1 to 4, wherein the inorganic antibacterial substance is a substance that generates silver ions. The washing machine according to any one of claims 1 to 5, wherein light emitted from the light irradiation means is ultraviolet light. The washing machine according to claim 6, wherein a wavelength at which the light emission means has a maximum light emission intensity is 365 nm to 400 nm. The washing machine according to any one of claims 1 to 7, wherein the light irradiation means uses an LED.

Images