JP2005296622A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dishwasher improving a detergency for a stuck dirt such as greasy dirt relatively hard to remove. <P>SOLUTION: This dishwasher uses a washing method having a first step of infiltrating mistlike first cleaning liquid (mistlike detergent) 28 atomized into a micron order into a dirt 30 on a washed object (dishes) 29 and leaving it for a predetermined time, and a second step of, sequential to the first step, removing the dirt 30 on the washed object (dishes) 29 by second cleaning liquid 33. This method can facilitate the peeling of the stuck dirt 30 from the washed object (dishes) 29 and provide a high detergency by combination between the first step and the second washing step. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dishwasher for cleaning an object to be cleaned on which dirt is attached.

  Conventionally, in order to remove dirt adhering to tableware and the like as shown in FIG. 7, the dishwasher swells the dirt by spraying mist-like washing water in advance, and then the mechanical force by jetting water A cleaning method using chemical power by a detergent has been considered (for example, see Patent Document 1). Hereinafter, the configuration will be described. The dishwasher main body 51 stores a tableware basket (not shown) for storing tableware in a cleaning tank 53, and a door 54 is provided at the opening 52 of the cleaning tank 53. Inside the cleaning tank 53, a nozzle 55 for ejecting the cleaning water stored in the cleaning tank 53 toward the tableware is provided, and an atomizing device 56 for atomizing the cleaning water stored in the cleaning tank 53 is provided. .

About the dishwasher comprised as mentioned above, the operation | movement is demonstrated below. Moreover, the washing | cleaning behavior of the stain | pollution | contamination adhering to the surfaces, such as tableware, is demonstrated in FIG. First, after setting dirty dishes in the tableware basket, the detergent is put in and the operation is started. When the operation is started, first, as shown in FIG. 8A, the cleaning water stored in the cleaning tank 53 is atomized by the atomizing device 56 to generate water particles 57. By spraying the generated water particles 57 into the cleaning tank 53, the water particles 57 come into contact with the dirt 59 adhering to the surface of the tableware 58 and enter the dirt 59 as shown in FIG. As shown in FIG. 8C, the stain 59 attached to the tableware or the like due to the penetration of the water particles 57 gradually swells. In particular, when the attached dirt is made of water-soluble dirt such as starch, the swelling of the dirt 59 is increased. Next, a main washing process of washing the tableware 58 with the washing liquid ejected from the nozzle 55 is performed. The cleaning behavior of the stain on the tableware surface in the main washing process will be described with reference to FIG. The adhering dirt 59 swollen in the previous step is gradually removed from the tableware and the like by a large amount of washing water 60 from the nozzle 55 as shown in FIGS. 9 (a), 9 (b), and 9 (c). After the cleaning process is completed, a rinsing process is performed by replacing the cleaning water in the cleaning tank 53 several times. And the washing | cleaning of tableware is complete | finished by performing the warm water rinse process which heated the replaced washing water to about 70 degreeC. Finally, a drying process for drying the water droplets attached to the tableware is performed, and the operation ends.
JP 2000-189375 A

  However, the conventional dishwasher is pre-treated with tap water that does not dissolve the washing ingredients, and can obtain a certain swelling effect on starchy stains such as cooked rice, but it has strong protein stains and fat stains. It did not reach to improve the cleaning effect for.

  The present invention solves the above-described conventional problems by making a mist-like cleaning solution in which a cleaning component is dissolved act on the dirt of an object to be cleaned to facilitate removal of the dirt, and subsequently washing with the cleaning liquid. The object is to provide a dishwasher with dramatically improved washing performance.

  In order to solve the above-described conventional problems, the dishwasher of the present invention includes a washing tank that accommodates an object to be cleaned such as tableware, and a cleaning nozzle that injects a cleaning liquid onto the object to be cleaned, and is micronized to micron order. A first step in which the mist-like first cleaning liquid penetrates the dirt of the object to be cleaned and is left for a predetermined time, and after the first process, the dirt of the object to be cleaned is removed with the second cleaning liquid. The second process can be executed.

  This makes it possible to implement a pretreatment process in which dirt attached to an object to be cleaned such as tableware is peeled off from the object to be cleaned, so that a dishwasher with improved cleaning power can be realized.

  ADVANTAGE OF THE INVENTION The dishwasher of this invention can implement | achieve the dishwasher which improved the cleaning power with respect to the adhesion stain | pollution | contamination which is comparatively hard to remove, such as oil stain | pollution | contamination.

  1st invention is equipped with the washing tank which accommodates to-be-washed objects, such as tableware, and the washing | cleaning nozzle which injects a washing | cleaning liquid to to-be-washed | cleaned object, and is to be washed for the mist-like 1st washing | cleaning liquid atomized into micron order A first step of allowing the soil to penetrate and leaving for a predetermined time and a second step of removing the dirt of the object to be cleaned with the second cleaning liquid after the first step. Thus, the attached dirt can be easily peeled off from the object to be cleaned, so that a high cleaning power can be obtained by a combination of the first process and the second cleaning process.

  According to a second aspect of the present invention, the first cleaning liquid in the first invention is constituted by dissolving at least one component of an alkaline agent, a surfactant, an enzyme, and a bleaching agent. The cleaning action can be optimized against dirt.

  In the third aspect, by using the second cleaning liquid in the first or second aspect as fresh water, the rinsing step can be performed simultaneously with the cleaning step in the second step.

  According to a fourth aspect of the present invention, the second cleaning liquid according to the first or second aspect is configured by dissolving at least one of an alkaline agent, a surfactant, an enzyme, and a bleaching agent. High detergency can be obtained even for dirt that cannot be sufficiently removed by the above process.

  In the fifth aspect of the present invention, the chemical components dissolved in the first cleaning liquid can be activated by heat by heating the first cleaning liquid in the first to fourth inventions with a heating means.

  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 is a cross-sectional view of a dishwasher according to Embodiment 1 of the present invention, FIG. 2 is a partial cross-sectional view showing a configuration of an apparatus for micronizing a cleaning liquid into micron order, and FIG. 3 is a mist-like detergent micronized with micron order. FIG. 3 is a process diagram illustrating a process in which the cleaning acts on dirt on an object to be cleaned. As shown in FIG. 1, a washing nozzle 5 having an injection port 4 for injecting washing water pressurized by a washing pump 3 is provided below a washing tank 2 housed in the body 1 of the dishwasher. Above the cleaning nozzle 5, there is provided a tableware basket 6 for storing tableware to be cleaned. A heater 7 for heating the cleaning water is disposed in the lower part of the cleaning tank 2.

  A detergent charging container 8 is disposed below the front surface of the cleaning tank 2. The detergent charging container 8 is opened at the upper surface, and a lid 9 is provided at the opening thereof so as to be opened and closed. Further, a water supply port 10 for supplying cleaning water to the cleaning tank 2 is provided on the side surface of the detergent charging container 8. The inside of the detergent charging container 8 is divided into upper and lower layers by a filter 11 having a large number of round holes on the surface. The filter 11 has an opening area suitable for moving to the lower layer 12 as a detergent solution when the powder is dissolved.

  On the side wall of the upper layer 13 of the detergent charging container 8, a discharge port 16 communicating with the first water supply valve 15 through the dissolution path 14 is provided. The detergent is dissolved by the discharge force of the washing water discharged from the discharge port 16, passes through the filter 11, and is stored in the lower layer 12 of the detergent charging container 8. The side wall of the lower layer 12 is open and communicates with the detergent liquid ejection nozzle 18 through the ejection path 17. Reference numeral 19 denotes a flow rate adjusting valve provided in the ejection path 17, which adjusts the ejection flow rate of the detergent liquid.

  At the lower part of the washing tank 2, a splash nozzle unit 20 for splashing the detergent solution onto the tableware is arranged. The scattering nozzle portion 20 is composed of the detergent liquid ejection nozzle 18 and the air ejection nozzle 21. The ejection direction of the air ejection nozzle 21 is arranged so that air is ejected in a direction substantially perpendicular to the ejection direction of the detergent liquid ejection nozzle 18 and scattered toward the tableware. The air ejection nozzle 21 ejects the air pressurized by the air pump 22. In addition, a second water supply valve 23 for supplying water to the cleaning tank 2 is provided in the ejection path 17 that communicates the detergent liquid ejection nozzle 18 and the detergent charging container 8.

  The air pump 22 has a drive source capable of varying the air ejection pressure capability, and is controlled by the control device 24 together with the cleaning pump 3, the heater 7, the first water supply valve 15, the second water supply valve 23, and the like. In the dissolution path 14 and the ejection path 17, check valves 25 and 26 are provided so that the sewage does not flow back to the first water supply valve 15 and the second water supply valve 23. The scattering nozzle portion 20 is covered with a protective cover 27 for preventing adhesion of dirt when the tableware is put in or when the tableware is washed.

  If a DC motor is used as the drive source, the air ejection pressure capability can be varied by controlling the applied current. In the case of an AC motor, the air ejection pressure can be varied by controlling the drive frequency of the drive source. Further, the detergent liquid spray nozzle 18, the air pump 22, the air jet nozzle 21, and the control device 24 constitute detergent liquid scattering means.

  The detergent charging container 8, the lid 9, the filter 11, the first water supply valve 15, the dissolution path 14 and the ejection path 17 constitute a detergent liquid generating means. Further, the first water supply valve 15, the discharge port 16 and the control device 24 constitute a concentration adjusting means.

  The operation of the dishwasher in the above configuration will be described, and the cleaning behavior at that time will be described with reference to FIG. First, the lid 9 attached to the upper part of the detergent charging container 8 is opened, and a predetermined amount of detergent (powder) is charged. The detergent is set on the filter 11 provided in the upper layer 13 of the detergent charging container 8. The water supplied from the first water supply valve 15 passes through the dissolution path 14 and is supplied to the upper layer 13 from the discharge port 16 opened on the side surface of the filter 11. At this time, the detergent dissolves while being stirred by the water flow at the time of water supply, and is stored as a detergent liquid in the lower layer 12 from the round hole provided in the filter 11.

  In addition, when the amount of water supplied to the detergent charging container 8 is set to be much smaller than the amount of water normally supplied to the dishwasher, it is possible to generate a highly concentrated detergent liquid. For example, when a predetermined amount of detergent is added, a detergent solution having a concentration of about 50 times can be generated by reducing the amount of water supplied to 1/50 of the normal amount. The first water supply valve 15 is used to generate a high-concentration detergent solution while dissolving the detergent with a small amount of tap water, and a low flow rate type is used.

  Next, when the air pump 22 is operated, high-speed air is ejected from the air ejection nozzle 21, and the detergent liquid ejection nozzle 18 arranged in the vertical direction and in the vicinity of the air ejection nozzle 21 is negative in the path due to the ejector effect. Therefore, the detergent liquid stored in the lower layer 12 of the detergent charging container 8 passes through the ejection path 17 and is sucked up by the detergent liquid ejection nozzle 18. Then, the detergent liquid is changed into a mist-like detergent 28 that is atomized by the air ejected from the air ejection nozzle 21 and scattered in the cleaning tank 2.

  As shown in FIG. 3 (a), the mist-like detergent 28 generated by the detergent liquid jet nozzle 18 retains pressure energy in the interior when it is microparticulated, and scatters in the washing tank 2, thereby washing the washing tank. 2 is brought into contact with the tableware 29 set in 2. In addition, since the pressure energy stored inside the mist-like detergent becomes higher as the particle size becomes finer, in order to obtain a higher effect, the particle size is set to a micron order. Dirt 30 is attached to the surface of the tableware 29. As shown in FIG. 3B, when the mist-like detergent 28 comes into contact with the dirt 30 on the surface of the tableware 29, the mist-like detergent 28 releases internal pressure energy toward the contact surface with the dirt 30. As shown in FIG. 3 (c), when the mist-like detergent 28 releases internal pressure energy toward the dirt 30, the cleaning component held therein is injected into the dirt. At this time, when a component having a penetrating action such as an alkaline agent is included in the mist-like detergent 28, the cleaning component penetrates deeply into the dirt, as shown in FIG. 3 (c). The hole 31 is to be opened. Further, when the mist-like detergent 28 has a surfactant therein, it further penetrates into the interface 32 between the tableware 29 and the dirt 30, and finally the dirt 30 is removed as shown in FIG. 3 (d). It will be lifted from the surface of the tableware 29. The effect of raising the dirt 30 increases as the time is longer and the concentration of the cleaning component is higher. Therefore, in order to obtain a higher floating effect, the mist detergent 28 is allowed to act on the dirt 30 and then left for a predetermined time.

  Due to the penetration and floating effect of the mist-like detergent 28, the bonding force between the tableware 29 and the dirt 30 is greatly reduced, and the dirt 30 is easily peeled off from the surface of the tableware 29.

  Next, a second stroke is performed following the first stroke. First, by opening the second water supply valve 23, a part of the tap water enters the lower layer 12 of the detergent charging container 8, and rinses the detergent charging container 8 together with the detergent remaining undissolved on the filter 11 while rinsing the detergent charging container 8. Water is supplied to the cleaning tank 2 from the water supply port 10. The remaining tap water is jetted into the cleaning tank 2 from the detergent liquid jet nozzle 18 through the jet path 17. Thus, in the water supply process in the second stroke after the first stroke, the detergent liquid in the ejection path 17 and the detergent liquid ejection nozzle 18 is washed away cleanly to prevent the detergent component from adhering to the path and stable. Maintain the jet of washed water.

  Then, after a certain amount of tap water is stored by a water level detection float (not shown), the cleaning pump 3 is driven and sprayed from the cleaning nozzle 5 onto the tableware. In the second cleaning step, the amount of detergent is mostly in the first cleaning step, in addition to the amount sprayed on the tableware, etc., and the remaining undissolved detergent in the cleaning tank 2 with the first water supply in the second cleaning step. Therefore, it is usually washed with washing water with a detergent concentration. FIG. 4 is a model diagram showing the cleaning behavior in the second step. As shown in FIG. 4A, the detergent liquid 33 is sprayed from the cleaning nozzle 5 toward the surface of the tableware 29. Since the dirt adhering to the surface of the tableware 29 is lifted from the surface of the tableware 29 by the mist-like detergent 28 in the first step, it can be easily removed from the surface of the tableware as shown in FIG.

  And after performing the rinse process of several times by replacing the wash water of the washing tank 2, the rinse process is completed with the heating rinse process with the high temperature wash water heated at the end. Moreover, the drying process which dries the tableware cleaned at the end may be performed.

  As described above, in the present embodiment, the first step is performed in which the detergent solution having a higher concentration than that of normal use is made mist by the air ejection nozzle 21 and attached to the object to be cleaned and left for a predetermined time. As a result, it becomes possible to raise the dirt adhering to the object to be cleaned, and, following the first step, the second step of removing the raised dirt is executed, so that the cleaning performance is greatly improved. Can do. Moreover, it can wash | clean in a short time using this high detergency, or it can wash | clean with a lower washing water temperature. Further, it is possible to clean dirt that could not be removed conventionally.

(Embodiment 2)
FIG. 5 is a cross-sectional view of the main part of the washing tub of the dishwasher according to Embodiment 2 of the present invention, and FIG. 6 is a partial cross-sectional view (AA) of the detergent liquid atomization apparatus in the first step. is there. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted. As shown in FIG. 5, the detergent liquid production | generation part 34 is comprised under the front surface of the washing tank 2 of a dishwasher. The detergent liquid generation part 34 is formed as a tank independent of the cleaning tank 2, has a fine particle unit 35 and a detergent holder 36, and is configured to cover the upper part with a detergent container cover 37. The cleaning tank 2 communicates with the cleaning tank 2 through a notch 38 formed by the cleaning tank 2 and the detergent container cover 37.

  The detergent holder cover 37 is provided with an upper opening 39 for introducing detergent from the outside on the substantially upper surface of the detergent holder 36. The fine mist detergent 28 is scattered into the cleaning tank 2 through the side opening 40 provided on the side surface of the detergent container cover 37. Further, as shown in FIG. 6, the micronization unit 35 encloses a liquid 42 and air 43 in a container 41, and is disposed on the lower surface of the container 41 in a direction in which the oscillation surface 44 a of the ultrasonic oscillator 44 faces the liquid 42. The packing 46 attached to the ultrasonic oscillator 44 with the lid 45 is pressed and sealed with water. The oscillation surface 44a of the ultrasonic oscillator 44 is provided substantially parallel to the interface (inclined surface) 47 of the container, but is installed with a slight inclination angle with respect to the water surface of the cleaning tank 2.

  The operation and action of the above configuration will be described. The fine particle unit 35 used in the dishwasher of the present invention is composed of a container 41 in which a liquid 42 is sealed on the oscillation surface 44a side of the ultrasonic oscillator 44, and the ultrasonic oscillator 44 is not in direct contact with cleaning water. Absent. Therefore, even when the dishwasher is operated, since it does not come into contact with very dirty washing water, the food does not become sludge and adheres to the oscillation surface 44a of the ultrasonic oscillator 44 and does not solidify. In addition, even when water with very high hardness such as well water is used, the inorganic component does not precipitate and adhere to the oscillation surface of the ultrasonic oscillator 44, and the atomization is stably performed over a long period of time. be able to.

  Next, the dishwasher of this invention is demonstrated. First, a predetermined amount of detergent is put in the detergent holder 35. Next, a predetermined amount of washing water is supplied from a water supply valve (not shown). At this time, the cleaning water is controlled by the control means 24 by setting the water supply water level so as to be above the interface 47. Further, the cleaning water enters the detergent liquid generation unit 34 from the notch 38, and a part of the detergent is dissolved in the cleaning water. At this point, when the ultrasonic oscillator 44 is driven, the oscillation propagates through the liquid 42 and is transmitted to the cleaning water through the interface 47. Then, a water column 48 is generated on the water surface, and the cleaning liquid is atomized from the water column 48.

  The mist detergent 28 generated by atomizing the cleaning liquid dissolves the detergent supplied in order to obtain stable cleaning performance and prevents the detergent liquid generated by dissolution from diffusing to lower the detergent concentration. First, the water column 48 made of the detergent liquid is collected in the detergent holder 36, and a return passage 49 is provided on the inner wall of the detergent container cover 37 so that the high-concentration detergent liquid does not flow into the cleaning tank 2. The return passage 49 is formed downward from the upper part of the detergent container cover 36, has a substantially U-shaped cross section and is recessed in a concave shape, and allows the passage as shown by an arrow. .

  With this configuration, a flow of water of the detergent liquid is generated in the detergent liquid generating unit 34, and the detergent is rapidly dissolved. Furthermore, it is possible to prevent a decrease in detergent concentration. Further, since the washing water is also heated by energizing the heater 7 simultaneously with the microparticulation operation, the dissolution of the detergent is promoted and the detergent concentration is increased. As described above, the concentration of the high-concentration detergent liquid is such that the concentration of the detergent liquid increases as the detergent liquid scatters.

  Although the high-concentration detergent liquid flows out into the cleaning tank 2 from the notch 38, since the opening area of the notch 38 is minimized, the decrease in the detergent liquid concentration is minimized. In addition, when there is no washing water above the interface 47, naturally the generation of the fine particle detergent also stops and the detergent liquid does not scatter. Therefore, when the ultrasonic oscillator 44 is driven, the control means 24 always supplies the washing water. The feed valve is controlled to be above the interface 47.

  Note that the generation efficiency of the mist-like detergent 28 is increased by optimizing the distance and relative angle between the interface 47 and the oscillation surface 44a and the distance from the interface 47 to the water surface. In addition, the interface 47 has an inclined surface. When bubbles are attached to the inner wall of the interface 47, it is difficult for the vibration of the ultrasonic oscillator 44 to propagate to the interface 47. Therefore, the bubbles move along the inclined surface. This is for shifting from the center of vibration.

  Moreover, since the mist-like detergent 28 that has been made fine particles has a fine particle diameter, the mist-like detergent 28 just drifts in the vicinity of the water surface without convection to the upper part of the washing tank 2 as it is. However, in the present embodiment, a configuration is described in which cleaning water is heated by energizing the heater 7 (flow means) simultaneously with the microparticulation operation, and air convection due to heat is generated as the temperature rises. And the mist-like detergent 28 fills the cleaning tank 2 all over the rising air flow of the air, and adheres uniformly to the surface of the tableware. In addition, by increasing the temperature of the detergent solution in the previous stage to make fine particles, chemical components in the cleaning solution are further activated, so that the cleaning effect is greatly improved.

  The cleaning process is the same as that of the first embodiment, and the description is omitted here. As described above, in the present embodiment, the cleaning performance is greatly improved by having the first step in which the detergent liquid is atomized by the atomization unit 35 and adhered to the object to be cleaned. Can do.

  As described above, the dishwasher according to the present invention performs cleaning with the second cleaning liquid after allowing the mist-like cleaning liquid micronized to the micron order to permeate the adhering dirt on the object to be cleaned and leave it for a predetermined time. In addition to the dishwasher, it is useful as a washing machine, a hand washing machine, a facial machine, etc.

Sectional drawing of the dishwasher of Embodiment 1 of this invention Partial sectional view showing a configuration for generating and scattering a high concentration detergent of the dishwasher Model diagram showing the washing behavior of the dishwasher Model diagram showing the washing behavior of the dishwasher Sectional drawing of the principal part of the washing tank of the dishwasher of Embodiment 2 of this invention Sectional view showing the micronizer of the dishwasher Side view of a conventional dishwasher Model diagram showing the washing behavior of the dishwasher Model diagram showing the washing behavior of the dishwasher

Explanation of symbols

28 Mist detergent (first cleaning liquid)
29 Tableware (objects to be cleaned)
30 Dirt 33 Detergent liquid (second cleaning liquid)

Claims (5)

A cleaning tank for storing objects to be cleaned, such as tableware, and a cleaning nozzle for injecting a cleaning liquid onto the objects to be cleaned. A dishwasher configured to be able to perform a first step of leaving for a predetermined time and a second step of removing dirt on the object to be cleaned with a second cleaning liquid after the first step. The dishwasher according to claim 1, wherein the first cleaning liquid is prepared by dissolving at least one component of an alkaline agent, a surfactant, an enzyme, and a bleaching agent. The dishwasher according to claim 1 or 2, wherein the second cleaning liquid is fresh water. The dishwasher according to claim 1 or 2, wherein the second cleaning liquid is obtained by dissolving at least one component of an alkaline agent, a surfactant, an enzyme, and a bleaching agent. The heating means for heating the cleaning water is provided, and in the first step, the first cleaning liquid finely divided is heated by the heating means and then permeates the dirt of the object to be cleaned. The dishwasher described.

Images