JP4830863B2 - dishwasher - Google Patents

Description

  The present invention relates to a dishwasher for washing dishes using washing water.

  In a normal dishwasher, since the cleaning water containing the dirt peeled off from the dishes is circulated for a certain period of time, there is a problem that the dirt once peeled off adheres to another dish. Many conventional dishwashers purify the washing water by occasionally discharging the washing water during the washing process and newly introducing clean rinse water. However, since a part of the washing water remains in the washing pump and the flow path at the time of drainage, there is a problem that the amount of the washing water is mixed with the rinsing water as a carry-over and contaminates the rinsing water. In particular, during the rinsing process, the redeposition of dirt tends to be a problem because the detergent concentration is low.

  Therefore, good cleaning results cannot be obtained unless cleaning water and rinsing water (hereinafter abbreviated as cleaning water) are replaced and purified about 2 to 4 times before the end of cleaning. Typical recontamination is cloudy stains or spot-like stains spreading on the glass surface, pepper grains adhering to the tableware, or fiber scraps of vegetables or meat. Purification of water by replacing the washing water in principle requires a large amount of water to be used and is inferior in water saving performance. Moreover, solid stains such as pepper grains and fine vegetable fibers are difficult to completely drain even when the washing water is replaced, and may remain as redeposits on the tableware surface.

In addition to drainage, the cleaning water can be purified by using a filter to filter the dirt, and by using fine bubbles to lift the dirt components and then removing the foam on the water surface by overflowing (floating separation method). There is. The former has an advantage in that it does not require consumable parts, while the latter requires periodic filter replacement. As an example of the flotation separation method, there is a method in which tableware is immersed and washed in a water tank, and after washing, fine bubbles are introduced into the water tank and floated to be removed (see, for example, Patent Document 1). Another method using the levitation separation method is to provide a levitation separation tank in the middle of the flow path of the washing water to remove the dirt component and to circulate and use the purified water at that portion (for example, Patent Document 2). reference).
JP 62-249634 A JP 09-173270 A

  The technique described in Patent Document 1 requires a water storage type washing tank large enough to immerse tableware, and consumes a large amount of water corresponding to the volume. Therefore, when aiming at water saving, it is not a method that meets the purpose. In addition, since a household dishwasher is required to be installed in a kitchen with limited space, it is miniaturized by using a spray cleaning method in which a small amount of cleaning water is injected, and an opening / closing door is provided on the front surface. The method using the water storage type washing tank cannot be compatible with the jet cleaning method, and since the lid is provided on the upper part, it is necessary to put in and out the tableware from a high position, which is inconvenient.

  Although the technique described in Patent Document 2 can be combined with the jet cleaning method, it is necessary to separately provide a floating separation tank and a flow path therefor. Bubbles meet the dirt component on the way to rise in the floating separation tank, and adsorb the dirt component to rise. Therefore, in order to sufficiently separate dirt, the floating separation tank requires a certain size in the height direction. When such a floating separation tank is arranged in the washing tank, it is necessary to reduce the arrangement space for the tableware or to enlarge the whole dishwasher, and both of them are less useful as a household dishwasher.

  The present invention realizes a floating separation system that suppresses the height of a floating separation tank, particularly in a domestic dishwasher with a size restriction in the height direction so that components for floating separation can be mounted. The purpose is to do.

  In order to solve the above-described conventional problems, the dishwasher of the present invention includes a bubble outlet for ejecting fine bubbles provided at one end of a water storage unit, a bubble generating means for generating fine bubbles, and the other end of the water storage unit. A suction port for discharging water provided in the lower part of the water storage part, and a drainage part connected to the upper part of the water storage part. The water storage part is elongated in the horizontal direction rather than in the depth direction, and the water storage part is soiled. By bubbling the washing water with the bubble generating means, the dirt component is floated and separated from the washing water and discharged from the drainage section.

  In general, since the process until the bubbles meet and join the dirt is stochastic, a somewhat long floating flow path is required. Further, in order to separate the bubbles combined with the dirt from the relatively clean washing water, it is necessary to float vertically upward. In normal levitation separation, the direction of the flow path and the levitation direction are set equal, but in the present invention, the flow path is set to the horizontal direction, separate from the levitation direction (vertically upward), and the floating for bonding bubbles and contaminants. While maintaining the distance sufficiently long, the height of the water storage section can be made smaller than that of a general floating separation tank.

  The dishwasher of the present invention can be reused while purifying the washing water in a limited space of a domestic dishwasher, greatly reducing the possibility that the dishes will be recontaminated with dirty water. Can do.

  1st invention is the washing tank which accommodates to-be-washed | cleaned object, the water storage part provided in the bottom part of the said washing tank, the washing pump which pressurizes the washing water in the said water storage part, and the washing | cleaning pressurized by the said washing pump A cleaning nozzle for injecting water toward an object to be cleaned, a bubble outlet for ejecting fine bubbles provided at one end of the water storage unit, a bubble generating means for generating fine bubbles, and a lower portion at the other end of the water storage unit And a drainage portion connected to the upper portion of the water storage portion, the water storage portion having an elongated shape in the horizontal direction rather than the depth direction, and dirty washing water in the water storage portion The bubble component is bubbled to cause the dirt component to float and separate from the washing water and to be discharged from the drainage section. By injecting bubbles in the major axis direction of the water reservoir, the fine bubbles float mainly in the horizontal direction and gradually rise obliquely upward. Fine bubbles mainly have a floating distance in the horizontal direction, during which they encounter and adsorb dirt components. Since the water flow ejected from the bubble ejection port is sucked into the lower part of the other end of the water reservoir, it is separated from the bubbles and dirt that float upward. As a result, the dirt is selectively discharged from the discharge portion provided above, and the cleaning water from which the dirt has been removed is pressurized by the cleaning pump and used for cleaning. By repeating this action, the cleaning water is gradually purified. By such an action, it becomes possible to perform floating separation by a water storage portion having a relatively small size in the height direction, and it is possible to mount it in a dishwasher with a restriction on the size in the height direction.

  According to a second aspect of the invention, there is provided a switching means for switching a flow path of cleaning water pressurized by the cleaning pump of the first invention between a cleaning nozzle and a water storage section, and a pump control means for controlling the driving of the cleaning pump. The pump control means switches the washing water to the water storage section side by the switching means and generates bubbles by the bubble generation means. The efficiency of flotation separation is greatly influenced by the size and amount of fine bubbles. A large flow rate type pump capable of generating a predetermined high pressure is suitable as the pressurizing means for generating bubbles in order to make the bubbles fine and to generate a large amount of bubbles. A pump having similar characteristics is also suitable for the jet cleaning method. Therefore, it is possible to share a single washing pump for both purposes, and it is desirable to share it for miniaturization of the entire configuration. In addition, making the cleaning nozzle and the bubble generating means a separate path for switching improves the certainty of floating separation for the following reason. The cleaning water sprayed from the cleaning nozzle hits an object to be cleaned such as a dish and then flows into the water storage section. At that time, if the inside of the water storage part is in the process of floating separation, there is a possibility that the dirt component floating on the surface of the water will be disturbed by the inflowing water flow so as to be enveloped by fine bubbles and settle again. In order to prevent such disturbance of floating separation, it is the simplest and most reliable that the washing nozzle and the bubble generating means are switched to separate paths so that the washing water injection and the floating separation do not occur simultaneously. is there.

  In the third aspect of the invention, in particular, the pump control means of the second aspect of the invention is such that the generation of bubbles by the bubble generation means is intermittently performed by the switching means. Usually, the stains on the tableware will gradually peel off over many hours of the washing and rinsing process. Therefore, the possibility of recontamination can be reduced if the flotation separation is intermittently performed several times during the washing and rinsing process. In addition, since the amount of dirt components that can be floated and held in a limited area of the water surface is limited, it is impractical to separate all the dirt components by a single floatation separation. For this reason, efficient purification becomes possible by intermittently performing floating separation.

  In the fourth aspect of the invention, in particular, the water storage part of any one of the first to third aspects is partially covered with a lid to form a water channel, and the upper half of the water channel that is in contact with the wash water is water repellent. It is made of the material of, and made it difficult for air bubbles to adhere to waterways. Since the water-repellent surface material has a large bubble contact angle, it is difficult for bubbles to adhere. For this reason, the bubbles and dirt efficiently flow toward the drainage part without the bubbles remaining in the upper part of the water channel. As a result, the dirt component can be efficiently discharged within a limited time.

  In the fifth aspect of the invention, in particular, the soil component that has floated on the water surface by raising the water surface of the water storage portion of any one of the first to fourth inventions is discharged to the drainage portion. The soil component having a high affinity for bubbles is present in a high concentration by being wrapped in creamy foam on the water surface near the drainage part. By overflowing the water storage part, dirt components on the water surface can be selectively discharged to the drainage part, and the remaining washing water can be relatively purified. As a result, the dirt component suspended in the washing water can be prevented from reattaching to the tableware, and the washing time can be shortened and the number of times of rinsing can be reduced.

  In the sixth invention, in particular, the water storage section of the fifth invention is provided in a substantially straight line, and the bubble outlet and the suction port connected to the cleaning pump are arranged at both ends in the longitudinal direction of the water storage section. A drainage part is provided above the vicinity of the. The water flow occurs in a straight line between the bubble jet port and the suction port, and the dirt component that floats between them is carried to the upper part of the suction port and accumulated. Therefore, a dirt component can be efficiently discharged by providing a drainage part at the upper part of the suction port and overflowing.

  In the seventh aspect of the invention, in particular, the water storage part of the fifth invention is provided in a shape having a bent part bent substantially at right angles to the horizontal direction, and a bubble outlet and a suction port are arranged at both ends of the water storage part, The drainage part is provided above the bent part of the water storage part. Since the water flow is relatively slow inside the bent portion, the dirt component wrapped in the foam collects in that portion. By providing a drainage part at the upper part of the bent part and overflowing, the dirt component can be discharged efficiently.

  In the eighth invention, in particular, the water storage section of the fifth invention is provided in a shape having a bent portion bent in a substantially U shape in the horizontal direction, and a bubble outlet and a suction port are provided at both ends of the water storage section. The drainage part is provided at the upper part of the bent part of the water storage part. Since the water flow is relatively slow inside the bent portion, the dirt component wrapped in the foam collects in that portion. By providing a drainage part at the upper part of the bent part and overflowing, the dirt component can be discharged efficiently.

  In a ninth aspect of the invention, in particular, a foam detection means for detecting the amount of bubbles is provided at a connecting portion between the water storage section and the drainage section of any one of the first to eighth aspects, and the pump control means is configured to detect the foam. The bubble generation is stopped when the amount of generated bubbles detected by the means falls below a predetermined amount. Floating separation due to microbubbles occurs under specific conditions such as the concentration of dirt being higher than a certain level. Therefore, in the case of cleaning water that has been purified to some extent, there may be no further effect. By stopping the bubble generation when foam does not occur stably, time and energy for flotation separation can be saved, or the next washing step such as rinsing can be carried out.

  In a tenth aspect of the invention, in particular, there is provided a dirt detecting means for detecting the degree of dirt of the washing water according to any one of the first to eighth inventions, and the pump control means is a dirt of the washing water detected by the dirt detecting means. In accordance with the degree, the bubble generating means is operated to generate bubbles in the water reservoir. Floating separation due to microbubbles occurs under specific conditions such as the concentration of dirt being higher than a certain level. Therefore, in the case of cleaning water that has been purified to some extent, there may be no further effect. By stopping the bubble generation when the contamination level of the washing water is below a certain level, it is possible to save time and energy for flotation separation and to proceed to the next washing step such as rinsing.

  In an eleventh aspect of the invention, in particular, temperature detection means for detecting the temperature of the cleaning water according to any one of the first to eighth aspects is provided, and the pump control means is configured so that the temperature of the cleaning water detected by the temperature detection means is The bubble generating means is operated to generate bubbles in the water reservoir when the value is equal to or greater than a predetermined value. Since the floating separation due to the fine bubbles occurs under specific conditions such as the temperature of the washing water being higher than a certain level, the effect may not be seen while the temperature of the washing water is low. Time and energy can be saved by stopping bubble generation when the temperature of the wash water is below a certain level.

  The twelfth invention is particularly provided with heating means for heating the cleaning water of any one of the first to eighth inventions, and the pump control means is a washing or rinsing step accompanied by heating by a signal from the heating means. The bubble generating means is operated at the time of executing to generate bubbles in the water reservoir. Since the floating separation due to the fine bubbles occurs under specific conditions such as the temperature of the washing water being higher than a certain level, the effect may not be seen while the temperature of the washing water is low. By starting bubble generation after a certain period of time has elapsed since the heating means has started to operate and then stopping after a certain period of time has elapsed, the time and energy for flotation separation can be made more efficient.

  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 configuration diagram of a dishwasher according to the first embodiment. A cleaning nozzle 2 is provided in a cleaning tank 1 for storing tableware (object to be cleaned) D. The water reservoir 3 is provided at the bottom of the cleaning tank 1 with a part of the water surface exposed, and most of the water surface is covered with the lid 4. A water-repellent surface 4 a is provided on the lower surface portion of the lid 4 that contacts the cleaning water. A bubble ejection port 5 and a suction port 6 are connected to the water storage unit 3, and a drainage unit 7 is provided in contact with the upper part of the suction port 6. A portion of the water surface of the water storage unit 3 adjacent to the drainage unit 7 forms a foam accumulation unit 8.

  And the washing pump 9 which pressurizes the washing water of the water storage part 3 and injects the washing water from the washing nozzle 2 toward the tableware D, and the washing water pressurized by the washing pump 9 is switched between the washing nozzle 2 and the bubble outlet 5. A switching means 10, a pump control means 11 for controlling the driving of the cleaning pump 9, a bubble generating means 12 for generating fine bubbles in the cleaning water pressurized by the cleaning pump 9, a water supply pipe 13 for supplying the cleaning water into the cleaning tank 1, In the cleaning tank 1, a drain pipe 7a for discharging the cleaning water to the outside of the machine is provided.

  The basic washing operation of the dishwasher is as follows. The tap water introduced into the washing tank 1 from the water supply pipe 13 dissolves the detergent placed in the washing tank 1 and fills the water storage section 3. The washing water accumulated in the water storage section 3 is pressurized by the washing pump 9 through the suction port 6 and sprayed from the washing nozzle 2 toward the tableware D in the washing tank 1 to perform washing and rinsing. After the water sprayed to the tableware D falls in the washing tank 1, it accumulates in the water storage part 3 and circulates again.

  Next, the operation and action of levitation separation, which is a characteristic process of the present invention, will be described. During cleaning and rinsing, the pump control means 11 intermittently switches the switching means 10 so that the cleaning water flows through the flow path toward the bubble generating means 12. The generated bubbles are ejected from the bubble ejection port 5 to the water storage unit 3, and fine bubbles are mixed in the water flow in the direction of arrow i. Since the wash water is sucked from the suction port 6 and circulates, a water flow indicated by an arrow B is generated in the water storage section 3. As a result of the bubbles receiving the force and buoyancy that are caused to flow in the direction of arrow B, the bubbles are separated diagonally upward to the left in the water storage section 3, and the water flow that does not include bubbles is separated in the direction of arrow B.

  In order for the floating separation to be sufficiently performed in the water storage unit 3, the ratio of the depth of the water storage unit 3 to the length of the major axis must be smaller than the ratio of the bubble rising speed and the jetting speed. For example, assuming that the bubble rising speed is 30 cm / min (approximate value when the bubble diameter is 100 μm), the flow rate of washing water is 3 m / min, and the depth of the water storage part 3 is 3 cm, If the length of the part is not more than 30 cm, the dirt component that sinks to the bottom of the water storage part will not float up to the water surface.

  On the other hand, when the length of the water storage unit 3 is sufficiently long, the dirt components and bubbles rise to the water surface before the foam accumulation unit 8. The inner surface of the lid 4 of the water storage unit 3 is subjected to a water repellent treatment to form a water repellent treated surface 4a. Even if bubbles or foam adhere to the surface, the water repellent treatment surface 4a is easily separated by the water flow and transferred to the foam accumulation portion 8.

  After the bubbles are ejected for a predetermined time, preferably 30 to 60 seconds, the cleaning pump 9 is reversed for a short time by the action of the pump control means 11, and the cleaning water in the flow path and the cleaning nozzle 2 is discharged. It flows backward and is supplied from the suction port 6 to the water storage unit 3. As a result, the water surface of the water storage unit 3 rises and the dirt floating along with the bubbles is discharged from the drainage unit 7.

  Note that the upper portion of the drainage unit 7 is covered in order to prevent a part of the cleaning water sprayed from the cleaning nozzle 2 during normal operation from being discharged from the drainage unit 7. Therefore, only the wash water overflowed from the water storage unit 3 is drained. In order to reduce the amount of backflow water necessary for causing overflow, it is desirable that the lid 4 of the water storage unit 3 be located at a position lower than the water surface.

  Bubbles having a particle size of the order of several hundreds of micrometers are the most effective for effective floating separation. The above particle size range is compatible with both the size of the surface area (larger as the particle size is smaller) and the appropriate ascent rate (larger as the particle size is larger). The most efficient bubble generating means 12 for generating bubbles of such size is a Venturi tube. The Venturi tube is obtained by narrowing a part of the flow path and expanding the taper shape to a taper shape so as to have an original inner diameter. By generating a negative pressure by speeding up the water flow at the throttle portion, air is self-primed from the air introduction pipe connected to the throttle portion. The Venturi tube has a feature that it can be made fine by sucking a large amount of air as compared with other bubble generating means.

  As another configuration of the bubble generating means 12, there is a swirling flow method. A negative pressure is generated by causing a high-speed swirling flow in a cylindrical or bowl-shaped container, and air is self-primed from the air introduction portion. The sucked air is refined by the swirling flow. Compared with the Venturi tube system, the flow path is less likely to be clogged.

  In order to stably generate such bubbles, it is desirable to include a surfactant at a concentration of several hundreds to several thousand ppm. However, if the concentration is high, foam may be formed on the surface of the object to be cleaned when sprayed from the cleaning nozzle 2 and the physical cleaning action by the spray of cleaning liquid may be impaired. Must be selected.

  In the case of containing a lot of water-soluble protein stains such as egg yolk, bubbles are likely to be generated stably, and bubbles on the water surface are also stably present, so that the efficiency of floating and separating the stains is high. This is because most water-soluble proteins are amphiphilic and act as surfactants. Of the chemical structure of water-soluble proteins, the hydrophobic part has a high affinity with the gas-liquid interface. get together. As a result, the bubbles are stabilized in the washing water, and at the same time, the bubbles rise with the bubbles and are easily separated from the washing water.

  Since a similar action is also observed for fats and oils and hydrophobic fine-particle dirt components (sesame grains and pepper grains of 1 mm or less), these components are easily floated and separated along with water-soluble proteins. When rinsing while saving water, there is a problem that the transparent glass tends to be white and cloudy, but proteins and lipids, which are the main components of clouding, can be removed more efficiently than other soil components by floating separation. In addition, when the water is rinsed while saving water, fine particle dirt tends to remain, but the floating separation by the fine bubbles is also effective for this problem. As a result, it is possible to reduce the number of times of rinsing one or two times by efficiently performing flotation separation and preferentially removing dirt components from the washing water.

(Embodiment 2)
FIG. 2 is a configuration diagram of the dishwasher according to the second embodiment. Since most of the configuration and the operation of the apparatus are the same as those of the first embodiment, only the different parts will be described. In the middle of the flow path through which the washing water flows from the suction port 6 to the washing pump 9, a dirt detection means 14 for detecting the dirt of the washing water is provided, and in cooperation with the pump control means 11, the washing water exceeds a predetermined level. Only when it is contaminated, the flow path of the washing water is switched to the direction of the bubble generating means 12. If the dirt detection unit 14 cannot detect dirt above a predetermined level, it is considered that the washing water has already been sufficiently purified. Therefore, the washing and bubble generation are stopped, rinsed, and proceeded to the next washing step such as drying. Control as follows.

  As the dirt detection means 14, a method based on light transmittance, a method based on the degree of light scattering, and a method based on electrical conductivity can be used. By adopting such an embodiment, the number of flotation separations and the cleaning time can be minimized, and the time to completion of cleaning can be shortened and energy consumption required for cleaning can be saved. It is.

(Embodiment 3)
FIG. 3 is a configuration diagram of the dishwasher according to the third embodiment. Since most of the configuration and the operation of the apparatus are the same as those of the first embodiment, only the different parts will be described. A temperature detecting means 15 for detecting the temperature of the washing water is provided in the middle of the flow path through which the washing water flows from the suction port 6 to the washing pump 9. Only when it is within the range, the flow path of the washing water is switched so that the washing water flows in the direction of the bubble generating means 12. Only when the temperature of the washing water is at least 40 ° C. or higher, bubbles are generated to perform floating separation.

  This is because when the temperature of the washing water is 40 ° C. or less, the bubbles are combined in the middle of rising in the water storage unit 3 to form large bubbles, and the floating separation cannot be effectively performed. By adopting such an embodiment, the number of flotation separations and the cleaning time can be minimized, and the time to completion of cleaning can be shortened and energy consumption required for cleaning can be saved. It is.

(Embodiment 4)
FIG. 4 is a top view of the washing tub of the dishwasher in the fourth embodiment. Whether or not levitation separation is effectively performed under a certain condition can be determined by the amount of foam floating on the water surface. In the case where the washing water is flowing in the direction of the bubble generating means 12 and the foam detection means 16 in FIG. 4 cannot detect bubbles of a predetermined amount or more, the washing water has already been sufficiently purified (or the bubbles are Therefore, it is preferable to control the cleaning and bubble generation to stop and proceed to the next cleaning step such as rinsing. The foam detection means 16 may be provided in the fifth and sixth embodiments. Also in that case, the foam detection means 16 is provided in the upper part of the water storage part 3 close to the drainage part 7.

(Embodiment 5)
FIG. 5 is a top view of the washing tub of the dishwasher in the fifth embodiment. Since most of the configuration and the operation of the apparatus are the same as those of the first embodiment, only different parts will be described. The water reservoir 3 is bent in a substantially L shape inside the cover 4 and the suction port 6 is provided at the distal end on the downstream side of the bent portion. Since the flow velocity is large outside the bent portion and the water flow hits the outer side surface of the bent portion to generate turbulent flow, the floated dirt mainly floats and accumulates inside the bent portion. In order to efficiently discharge the accumulated dirt, the drainage part 7 is provided inside the bent part. By adopting such an embodiment, even when the length of the water storage portion in the horizontal direction cannot be made sufficiently large in a straight line, it can be implemented.

  Further, the dishwasher of this embodiment includes a heating means 17. During washing and rinsing, a predetermined time elapses after the heating of the washing water is started, and after the temperature of the washing water reaches 40 ° C. or higher, bubbles are generated and floating separation is started intermittently. This is because when the temperature of the washing water is 40 ° C. or lower, the generated bubbles are immediately combined and a preferable bubble diameter cannot be maintained, and floating separation cannot be performed.

(Embodiment 6)
FIG. 6 is a top view of the washing tub of the dishwasher in the sixth embodiment. Since most of the configuration and the operation of the apparatus are the same as those of the first embodiment, only the different parts will be described. The water storage part 3 is bent in a substantially U shape inside the cover 4 and the suction port 6 is provided at the tip part on the downstream side of the bent part. Since the flow velocity is large outside the bent portion and the water flow hits the outer side surface of the bent portion to generate turbulent flow, the floated dirt mainly floats and accumulates inside the bent portion. In order to efficiently discharge the accumulated dirt, the drainage part 7 is provided inside the bent part. By adopting such an embodiment, even when the length of the water storage portion in the horizontal direction cannot be made sufficiently large in a straight line, it can be implemented.

  As described above, the dishwasher according to the present invention can be used in any type of washing apparatus using a commercial dishwasher and a washing liquid. By using the cleaning liquid and the rinsing liquid while purifying them, it is possible to prevent the reattachment of dirt and to shorten the cleaning process or to reduce the number of times of rinsing.

The block diagram of the dishwasher in Embodiment 1 of this invention The block diagram of the dishwasher in Embodiment 2 of this invention The block diagram of the dishwasher in Embodiment 3 of this invention The top view of the dishwasher in Embodiment 4 of this invention The top view of the dishwasher in Embodiment 5 of this invention The top view of the dishwasher in Embodiment 6 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing tank 2 Washing nozzle 3 Water storage part 5 Bubble jet outlet 6 Suction port 7 Drainage part 8 Foam accumulation part 9 Washing pump 10 Switching means 11 Pump control means 12 Bubble generation means 13 Water supply pipe 14 Dirt detection means 15 Temperature detection means 16 Foam Detection means 17 Heating means

Claims (12)

A cleaning tank for storing the object to be cleaned, a water storage part provided at the bottom of the cleaning tank, a cleaning pump for pressurizing the cleaning water in the water storage part, and the cleaning water pressurized by the cleaning pump to the object to be cleaned A cleaning nozzle that injects toward the water, a bubble outlet that ejects fine bubbles provided at one end of the water reservoir, a bubble generating means that generates fine bubbles, and a water provided at the lower end of the other end of the water reservoir. And a drainage part connected to the upper part of the water storage part, the water storage part is elongated in the horizontal direction rather than the depth direction, and the dirty cleaning water in the water storage part is removed by the bubble generating means A dishwasher in which dirt components are floated and separated from washing water by bubbling and discharged from the drainage section. There is provided switching means for switching the flow path of the washing water pressurized by the washing pump between the washing nozzle and the water storage section, and pump control means for controlling the driving of the washing pump, and the pump control means is configured to wash the washing water by the switching means. The dishwasher according to claim 1, wherein the bubble is generated by the bubble generation means by switching to the water storage side. 3. The dishwasher according to claim 2, wherein the pump control means intermittently generates bubbles by the bubble generation means by the switching means. The water storage part is partially covered with a lid to form a water channel, and the upper half of the water channel in contact with the wash water is made of a water-repellent material so that bubbles are less likely to adhere to the water channel. 4. The dishwasher according to any one of 3 above. The dishwasher according to any one of claims 1 to 4, wherein a dirt component floating on the water surface is discharged to the drainage portion by raising the water surface of the water storage portion. 6. The water storage section is provided in a substantially straight line, the bubble outlet and the suction port connected to the cleaning pump are disposed at both ends in the longitudinal direction of the water storage section, and a drainage section is provided above the vicinity of the suction port. The dishwasher described. The water storage portion is provided in a shape having a bent portion bent substantially at right angles to the horizontal direction, a bubble jet port and a suction port are disposed at both ends of the water storage portion, and a drainage portion is provided above the bent portion of the water storage portion. The dishwasher according to claim 5. The water storage portion is provided in a shape having a bent portion bent in a substantially U shape in the horizontal direction, a bubble jet port and a suction port are provided at both ends of the water storage portion, and a drainage portion is provided above the bent portion of the water storage portion. The dishwasher according to claim 5 provided. A foam detection means for detecting the amount of bubbles is provided at the connecting portion between the water storage section and the drainage section, and the pump control means stops the bubble generation when the amount of bubbles generated detected by the foam detection means falls below a predetermined amount. The dishwasher according to any one of claims 1 to 8, wherein the dishwasher is provided. A dirt detecting means for detecting the degree of dirt of the washing water is provided, and the pump control means operates the bubble generating means according to the degree of dirt of the washing water detected by the dirt detecting means to produce bubbles in the water storage section. The dishwasher according to any one of claims 1 to 8. A temperature detection means for detecting the temperature of the washing water is provided, and the pump control means operates the bubble generation means when the temperature of the washing water detected by the temperature detection means is equal to or higher than a predetermined value to generate bubbles in the water reservoir. The dishwasher according to any one of claims 1 to 8, wherein the dishwasher is provided. A heating means for heating the cleaning water is provided, and the pump control means operates the bubble generating means during the execution of the cleaning or rinsing process with heating in accordance with a signal from the heating means to generate bubbles in the water storage section. The dishwasher according to any one of claims 1 to 8.