JP2022007463A - Washing method and washing system - Google Patents

Abstract

To provide a washing method and a washing system in which cleanliness of immersion water for use in immersion washing is kept as much as possible, and thereby the washed material can be washed effectively.SOLUTION: A washing system includes: an immersion tank for storing immersion water, and performing immersion washing of the washed material; carrying means for immersing at least a portion in the immersion water, and carrying the washed material from the carrying-in port side to the carrying-out port side; fine air bubble mixing means for mixing fine air bubbles in the passing liquid; discharge means for discharging the immersion water sucked up from a circulation port provided in the immersion tank in the carrying-out port side into the immersion tank through the fine air bubble mixing means, and circulating the immersion water; and a discharge port for discharging the water by making the immersion water overflow. In the washing system, solid dirt materials having the density larger than the immersion water among dirt materials separated from the washed material are made to come up on the water surface of the immersion water or in the vicinity of the surface of the water by the fine air bubbles, and thereby the solid dirt materials having the density larger than the immersion water are made to overflow from the discharge port along with the immersion water and are discharged from the immersion tank.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cleaning method and a cleaning system capable of effectively cleaning an object to be cleaned while maintaining the cleanliness of the immersion water used in the immersion cleaning as much as possible.

Conventionally, the following are known as a cleaning system for cleaning an object to be cleaned, for example, tableware that has been eaten.

In Patent Document 1, a tableware case in which tableware to be cleaned is stacked and stored is immersed in the immersion water stored in the immersion tank for immersion cleaning, and a part of the stains adhering to the object to be cleaned is removed. It is a cleaning system that performs immersion cleaning that separates and makes it easy to separate the remaining dirt that has not been separated from the object to be cleaned. The object to be washed, which has been immersed and washed, is washed by spraying washing water in a washing device which is a subsequent step.

Japanese Unexamined Patent Publication No. 10-108816

In the case described in Patent Document 1, when a large amount of the object to be cleaned is immersed and washed with the immersion water stored in the immersion tank, the stains separated from the object to be cleaned are mixed in the immersion water. If a large amount of dirt separated from the object to be cleaned is mixed with the immersion water, there is a problem that the dirt adheres to the object to be cleaned again.

It is an object of the present invention to provide a cleaning method and a cleaning system capable of effectively cleaning an object to be cleaned while maintaining the cleanliness of the immersion water used in the immersion cleaning as much as possible.

The cleaning method according to the present invention for achieving the above object is
The object to be cleaned is immersed in the immersion water in which the fine bubbles stored in the immersion tank are mixed, and the object to be cleaned immersed in the immersion water is conveyed by the transport means, and the fine bubbles mixed in the immersion water are used. , Including a dip cleaning step of performing dip cleaning to separate solid stains adhering to the object to be cleaned.
Of the stains separated in the immersion cleaning step, solid stains having a higher density than the immersion water are floated by the fine bubbles on or near the water surface of the immersion water and have a higher density than the immersion water. It is characterized in that solid dirt overflows together with the immersion water and is discharged from the immersion tank.

In addition, the cleaning system according to the present invention in order to achieve the above object
An immersion tank that stores a predetermined amount of immersion water, immerses the object to be cleaned, and performs immersion cleaning to separate solid stains adhering to the object to be cleaned from the object to be cleaned.
At least a part of the immersion water stored in the immersion tank is immersed, and the object to be cleaned is transported from the carry-in inlet side of the immersion tank to carry in the object to be cleaned to the carry-out port side of the immersion tank to carry out the object to be cleaned. Transport means and
A fine bubble mixing means that mixes fine bubbles in the passing liquid,
A discharge means for circulating the immersion water by discharging the immersion water sucked from the circulation port provided in the immersion tank on the carry-out port side into the immersion tank via the fine bubble mixing means.
An outlet for draining water by overflowing the immersion water stored in the immersion tank,
Equipped with
Of the stains separated from the object to be cleaned, solid stains having a higher density than the immersion water are floated by the fine bubbles on or near the water surface of the immersion water, and the solid state has a higher density than the immersion water. It is characterized in that the dirt of the above is overflowed from the discharge port together with the immersion water and discharged from the immersion tank.

According to the cleaning method and the cleaning system of the present invention, the cleanliness of the immersion water used in the immersion cleaning can be maintained as much as possible, and the object to be cleaned can be effectively cleaned.

A front sectional view showing an outline of the configuration of a dipping device in the cleaning system according to the embodiment of the present invention. The front sectional view which shows the outline of the structure of the cleaning apparatus among the cleaning system of one Embodiment of this invention. It is a schematic diagram which shows the structure of the slope discharge port of the dipping device, (a) is the schematic perspective view which shows the structure of the slope on the carry-in entrance side and the discharge groove, (b) is the structure when the discharge groove is seen from above. Schematic plan view showing. It is a schematic diagram which shows the structure of the wall surface discharge port of the immersion apparatus, (a) is a schematic front view which shows the state attached to the wall surface of the immersion tank, (b) is the wall surface of the immersion tank and the discharge amount adjusting means. The schematic perspective view which shows the structure of the wall surface discharge port in the state which omits. (A) is a schematic perspective view showing the configuration of a shower nozzle on the carry-in entrance side of the dipping device, and (b) is a schematic cross-sectional view taken along the line AA of (a). The front sectional view (hatching omitted) which shows the outline of the 2nd main cleaning lower nozzle of the said cleaning apparatus. Schematic perspective view of a tableware basket in which tableware to be washed is stacked and stored. It is a schematic diagram showing how the dirt adhering to the object to be cleaned by the dipping device is separated by fine air bubbles, and (a) is a state where the dirt is attached to the tableware which is the object to be cleaned. , (B) is a state in which dirt adhering to the tableware to be cleaned is separated by fine air bubbles or the like, and (c) is a state in which dirt adhering to the tableware to be cleaned is separated by fine air bubbles or the like and immersed. It is in a state of floating toward the surface of the water.

The first invention is
The object to be cleaned is immersed in the immersion water in which the fine bubbles stored in the immersion tank are mixed, and the object to be cleaned immersed in the immersion water is conveyed by the transport means, and the fine bubbles mixed in the immersion water are used. , Including a dip cleaning step of performing dip cleaning to separate solid stains adhering to the object to be cleaned.
Of the stains separated in the immersion cleaning step, solid stains having a higher density than the immersion water are floated by the fine bubbles on or near the water surface of the immersion water and have a higher density than the immersion water. It is a cleaning method characterized by overflowing solid dirt together with the immersion water and discharging it from the immersion tank.

As a result, the immersion cleaning is made effective by maintaining the cleanliness of the immersion water as much as possible, and the dirt separated from the object to be cleaned by the immersion cleaning is suppressed from reattaching to the object to be cleaned. Can be done. That is, the object to be cleaned can be effectively washed.

The second invention is the first invention.
Immersion water containing solid dirt stored in the immersion tank is sucked in by a discharge means through a circulation port provided on the carry-out outlet side of the immersion tank to carry out the object to be cleaned.
The immersion water sucked by the discharge means is circulated by being discharged to the carry-in inlet side of the immersion tank to carry in the object to be cleaned via the fine bubble mixing means for mixing the fine bubbles into the immersion water. It is a cleaning method characterized by.

As a result, compared to the case where water mixed with fine bubbles prepared separately is supplied to the immersion tank, the fine bubbles are effectively attached to the solid dirt contained in the immersion water and floated in the immersion water. be able to. Then, it can be overflowed from the immersion tank to effectively discharge solid dirt together with the immersion water.

The third invention is the second invention.
The cleaning method is characterized in that the immersion water sucked into the discharge means through the circulation port contains solid dirt that passes through the strainer over the circulation port.

In this way, the size of the solid dirt that flows through the eyes of the strainer and flows to the circulation port is selected, and the size of the solid dirt is set to a size that is easy to float when fine bubbles are attached. Can be done. In addition, the amount of solid stains passing through the strainer's eyes can be limited so that a predetermined amount of solid stains is contained in the immersion water per unit volume passing through the strainer's eyes.

That is, it is possible to limit the proportion of solid stains contained in the immersion water and mix a predetermined amount of fine bubbles with the immersion water per unit volume. Then, the fine bubbles mixed in the immersion water effectively float solid dirt, overflow with the immersion water and be discharged from the immersion tank, and the cleanliness of the immersion water stored in the immersion tank is improved. It can be kept as long as possible and soaked and washed with soaking water can be effective.

The fourth invention is the invention of any one of the first to the third.
Detergent is supplied to the immersion water,
Solid stains having a higher density than the immersion water floated by the fine bubbles in the immersion water are captured by the foam generated by supplying the detergent, and the solid stain captured by the foam is captured by the foam. It is a cleaning method characterized in that it overflows together with the immersion water and is discharged from the immersion tank.

As a result, solid dirt floating in the immersion water can be captured by the bubbles generated by supplying the detergent, and can be effectively overflowed from the discharge port together with the immersion water and discharged.

The fifth invention is the invention of any one of the first to the fourth.
The cleaning method comprises the main cleaning step of spraying cleaning water from a two-fluid injection nozzle toward the tableware to be washed by immersion cleaning in the immersion cleaning step.

As a result, the washing water can be sprayed widely toward the object to be cleaned as compared with the case where the cleaning water is sprayed only at high pressure, and a wide range of the object to be cleaned can be effectively washed with the high pressure cleaning water. be able to.

The sixth invention is
An immersion tank that stores a predetermined amount of immersion water, immerses the object to be cleaned, and performs immersion cleaning to separate solid stains adhering to the object to be cleaned from the object to be cleaned.
At least a part of the immersion water stored in the immersion tank is immersed, and the object to be cleaned is transported from the carry-in inlet side of the immersion tank to carry in the object to be cleaned to the carry-out port side of the immersion tank to carry out the object to be cleaned. Transport means and
A fine bubble mixing means that mixes fine bubbles in the passing liquid,
A discharge means for circulating the immersion water by discharging the immersion water sucked from the circulation port provided in the immersion tank on the carry-out port side into the immersion tank via the fine bubble mixing means.
An outlet for draining water by overflowing the immersion water stored in the immersion tank,
Equipped with
Of the stains separated from the object to be cleaned, solid stains having a higher density than the immersion water are floated on or near the water surface of the immersion water by the fine bubbles, and the solid state has a higher density than the immersion water. It is a cleaning system characterized in that the dirt of the above is overflowed from the discharge port together with the immersion water and discharged from the immersion tank.

As a result, the immersion cleaning is made effective by maintaining the cleanliness of the immersion water as much as possible, and the dirt separated from the object to be cleaned by the immersion cleaning is suppressed from reattaching to the object to be cleaned. Can be done. That is, the object to be cleaned can be effectively washed.

The seventh invention is the sixth invention.
Cover the circulation port with a strainer and
The cleaning system is characterized in that the immersion water sucked into the discharge means through the circulation port contains solid dirt that passes through the strainer over the circulation port.

In this way, the size of the solid dirt that flows through the eyes of the strainer and flows to the circulation port is selected, and the size of the solid dirt is set to a size that is easy to float when fine bubbles are attached. Can be done. In addition, the amount of solid stains passing through the strainer's eyes can be limited so that a predetermined amount of solid stains is contained in the immersion water per unit volume passing through the strainer's eyes.

That is, it is possible to limit the proportion of solid stains contained in the immersion water and mix a predetermined amount of fine bubbles with the immersion water per unit volume. Then, the fine bubbles mixed in the immersion water effectively float solid dirt, overflow with the immersion water and be discharged from the immersion tank, and the cleanliness of the immersion water stored in the immersion tank is improved. It can be kept as long as possible and soaked and washed with soaking water can be effective.

The eighth invention is the sixth or seventh invention.
Further provided with a detergent supply means for supplying detergent to the immersion water stored in the immersion tank,
Solid stains having a higher density than the immersion water floated by the fine bubbles in the immersion water are captured by the foam generated by supplying the detergent, and the solid stain captured by the foam is immersed. It is a cleaning system characterized in that it overflows from the discharge port together with water and is discharged from the immersion tank.

As a result, solid dirt floating in the immersion water can be captured by the bubbles generated by supplying the detergent, and can be effectively overflowed from the discharge port together with the immersion water and discharged.

The ninth invention is the invention of any one of the sixth to eight.
The immersion water is discharged into the immersion tank via the fine bubble mixing means on the carry-in port side of the immersion tank.
It is a cleaning system characterized in that the discharge port is located on the carry-in port side of the immersion tank.

As a result, when the immersion water containing solid dirt flows to the carry-out port side, the immersion water containing the solid dirt is sucked in by the discharge means on the carry-out port side of the immersion tank and discharged on the carry-in port side. do. Then, it can be intensively overflowed from the discharge port on the carry-in port side and discharged.

The tenth invention is the invention of any one of the sixth to nine.
The cleaning system is characterized in that the discharge port is provided with a comb-shaped discharge amount adjusting means for reducing the cross-sectional area of the flow path of the discharge port.

As a result, the size of the opening of the discharge port is not changed, and the cross-sectional area of the flow path through which the immersion water flows to the discharge port is changed small by the discharge amount adjusting means, the flow velocity flowing to the discharge port is increased, and the immersion is performed. It is possible to facilitate the discharge of solid dirt that has floated on or near the surface of the water.

The eleventh invention is the invention of any one of the sixth to tenth.
A transport means for transporting tableware, which is the object to be washed that has been soaked and washed,
The main washing tank that stores a predetermined amount of washing water, and
A first discharging means for sucking and discharging the washing water stored in the main washing tank, and
A second discharging means that sucks the washing water stored in the main washing tank and discharges it at a higher pressure than that discharged from the first discharging means.
A nozzle that injects both the washing water discharged from the first discharging means and the washing water discharged from the second discharging means from the same injection hole to wash the dishes to be conveyed by the conveying means. ,
It is a cleaning system characterized by further provided with a cleaning device having the above.

As a result, the washing water can be sprayed widely toward the object to be cleaned as compared with the case where the cleaning water is sprayed only at high pressure, and a wide range of the object to be cleaned can be effectively washed with the high pressure cleaning water. be able to.

(Embodiment 1)
(Washing system configuration)
First, the configuration of the cleaning system 1 of the present embodiment will be described.

The cleaning system 1 of the present embodiment includes a dipping device 10 shown in FIG. 1, a cleaning device 50 shown in FIG. 2, and a control panel 100 (not shown).

In the dipping device 10 shown in FIG. 1, for example, the tableware basket W in which the tableware T, which is the object to be washed, is stacked and housed is immersed in the dipping water stored in the dipping tank 20 for a predetermined time to remove the dirt D adhering to the tableware T. Immersion cleaning is performed to moisten and separate. Further, the cleaning device 50 shown in FIG. 2 sprays cleaning water onto the object to be cleaned by the dipping device 10 to perform cleaning. The control panel 100 is electrically connected to the dipping device 10 and the cleaning device 50 for control. Further, the solid line arrows shown in FIGS. 1 and 2 indicate the transport direction of the object to be cleaned.

Further, the white arrows shown in FIGS. 1 and 2 indicate the flow direction of the immersion water, the washing water, the finishing rinse water and the fresh water, that is, the water.

The stain D adhering to the object to be cleaned refers to a stain D containing a liquid or solid stain D, unless otherwise specified, and does not particularly limit its shape or state. ..

Further, in the present invention, the state in which the cleanliness is lowered means a state in which the immersion water or the washing water contains a large amount of dirt D adhering to the object to be washed. Maintaining the cleanliness as much as possible means to reduce the amount of dirt D adhering to the object to be cleaned contained in the immersion water or the washing water as much as possible.

Further, in the present invention, bubbles floating on the surface of water are referred to as bubbles, and bubbles mixed or mixed in water are referred to as bubbles.

Further, in the present invention, the object to be washed is the tableware T that has finished eating, and may be simply expressed as the tableware T that is the object to be washed or the tableware T that is stacked and stored in the tableware basket W.

(Structure of immersion device)
First, the configuration of the dipping device 10 will be described.

As shown in FIG. 1, the dipping device 10 is
The outer shell 11 constituting the wall surface of the dipping device 10 and
An immersion tank 20 for storing immersion water heated to a predetermined temperature, for example, 40 to 60 degrees Celsius,
The transport means 21 for transporting the object to be cleaned in the immersion tank 20 in the transport direction, that is, from the carry-in inlet 10a side to the carry-out port 10b side.
The carry-in entrance side slope (slope) 20a, which is a slope on which the object to be cleaned is slid down to the transport means 21,
A slope discharge port (discharge port) 12 provided on the carry-in inlet side slope 20a for discharging bubbles and the like floating on the water surface of the immersion water stored in the immersion tank 20 together with the immersion water overflowing at a predetermined water level.
A wall discharge port (discharge port) 23 provided on the wall surface of the immersion tank 20 for discharging bubbles and the like floating on the surface of the immersion water stored in the immersion tank 20 together with the immersion water overflowing at a predetermined water level.
A water supply pipe 26 having a water supply port 27 for supplying fresh water to the immersion tank 20 by opening a valve 26a on the carry-out port 10b side.
A circulation pipe (pipe) 31 that sucks the immersion water stored in the immersion tank 20 through a circulation port 34 at the bottom on the carry-out port 10b side by a circulation pump (discharge means) 33 and causes the discharged immersion water to flow.
A drainage pipe (pipe) 39 that drains the immersion water in the circulation pipe 31 by opening the valve 39a.
The fine bubble mixing means 32 that mixes the fine bubbles B into the immersion water discharged by the circulation pump 33, and
On the carry-in inlet 10a side for carrying in the object to be cleaned, the immersion water flowing through the circulation pipe 31 is branched from the circulation pipe 31 and flowed through the shower pipe (pipe) 35 on the carry-in entrance side, and the immersion water is discharged from above the immersion tank 20. Shower nozzle (shower nozzle) 35a on the carry-in entrance side to inject,
On the carry-out port 10b side for carrying out the object to be cleaned, the immersion water flowing through the circulation pipe 31 is branched from the circulation pipe 31 and flowed through the shower pipe (pipe) 36 on the carry-out outlet side, and the immersion water is discharged from above the immersion tank 20. Shower nozzle (shower nozzle) 36a on the carry-out port side to inject,
A discharge port 38 for draining the immersion water stored in the immersion tank 20 through the drainage pipe (pipe) 37 by opening the valve 37a.
The finishing rinse water is sucked and discharged by the finishing rinse pump (discharge means) 93 by the cleaning device 50 (see FIG. 2), and the finishing rinse water is sprayed from above the immersion tank 20 through the connection pipe 40 (shower). Nozzle) 40a and
Detergent supply means (not shown) that supplies detergent to the immersion water stored in the immersion tank 20
It is equipped with.

Further, the immersion device 10 includes a circulation path 30 for circulating the immersion water in the immersion tank 20. The circulation passage 30 sucks and discharges the immersion water stored in the immersion tank 20 by the circulation pump 33 through the circulation port 34, and mixes the fine bubbles B into the immersion water from the circulation pipe 31 via the fine bubble mixing means 32. While discharging, it is circulated to the immersion tank 20 again.

Further, the circulation path 30 has a path for branching the immersion water discharged from the circulation pump 33 from the circulation pipe 31 and injecting the immersion water from the carry-in inlet side shower nozzle 35a to the immersion tank 20 through the carry-in inlet side shower pipe 35 and circulation. It includes a path that branches from the pipe 31 and is injected from the shower nozzle 36a on the carry-out outlet side to the immersion tank 20 through the shower pipe 36 on the carry-out outlet side. These two paths do not allow the immersion water to flow to the fine bubble mixing means 32 after being sucked in by the circulation pump 33 through the circulation port 34 and discharged. That is, it is a path that does not allow the fine bubbles B to be mixed in the immersion water.

As described above, the circulation path 30 is composed of a circulation path 30 for mixing the fine bubbles B into the immersion water by the fine bubble mixing means 32 and a circulation path 30 for preventing the fine bubbles B from being mixed with the immersion water.

The immersion water stored in the immersion tank 20 is heated to a predetermined temperature by, for example, blowing steam supplied by a steam pipe. Then, a temperature sensor or the like electrically connected to the control panel 100 is provided in the immersion tank 20, and when the immersion water stored in the immersion tank 20 reaches a predetermined temperature, the valve provided in the steam pipe is closed to heat the water. stop.

The bottom surface of the immersion tank 20 is inclined at a predetermined angle, for example, 5 degrees with respect to the horizontal direction, and is inclined upward from the carry-in inlet 10a side to the carry-out port 10b side. The immersion tank 20 shown in FIG. 1 has a deformed structure, and a predetermined angle at which the bottom surface of the immersion tank 20 is inclined with respect to the horizontal direction is an example.

The transport means 21, which is arranged so as to be immersed in at least a part of the immersion water stored in the immersion tank 20 and is inclined upward along the bottom surface of the immersion tank 20, is to be cleaned in the immersion water stored in the immersion tank 20. For example, a chain conveyor. The transport means 21 carries in from the carry-in inlet 10a and slides down the carry-in entrance side slope 20a to convey the object to be cleaned to the carry-out port 10b side. The object to be cleaned is carried out from the slope (slope) 20b on the carry-out port side to the carry-out port 10b so as to be pushed out by the items to be washed which are sequentially conveyed at the carry-out port 10b.

As shown in FIGS. 3A and 3B, the carry-in entrance side slope 20a is provided with a discharge groove 13 formed in a groove shape in a direction orthogonal to the downwardly inclined direction of the carry-in entrance side slope 20a. There is. A drainage pipe (piping) 14 is connected to the bottom of the drainage groove 13. When the immersion water stored in the immersion tank 20 exceeds a predetermined water level, bubbles or the like floating on the water surface of the immersion water overflow together with the immersion water from the carry-in inlet side slope 20a to the discharge groove 13 through the slope discharge port 12. , Drain from the drain pipe 14.

Then, the bubbles and the like discharged to the slope discharge port 12 and the immersion water flow to the drainage channel of the facility through the drainage pipe 14.

The dimensions of the carry-in entrance side slope 20a, the slope discharge port 12, the drain groove 13, and the drain pipe 14 shown in FIGS. 3A and 3B are deformed in consideration of easy viewing.

When the tableware basket W in which the tableware T is stacked and stored is slid down on the slope 20a on the carry-in entrance side, the tableware basket W in which the tableware T is stacked and stored in contact with the corner of the discharge groove 13 does not stop. It is also possible to make 13 sufficiently small, and by bridging the discharge groove 13 with a sheet metal or the like, the tableware basket W in which the tableware T is stacked and stored comes into contact with the corner of the discharge groove 13 and stops. It is also possible to prevent it.

The wall surface discharge port 23 shown in FIG. 4A is provided on the wall surface on the carry-in port 10a side of the immersion tank 20 for storing the immersion water. The wall surface discharge port 23 is fixed to the wall surface of the immersion tank 20 by passing a screw or the like through an adjusting hole 24a which is a long hole formed so as to be long in the vertical direction on both sides thereof, and the position in the height direction thereof is adjusted. It has a discharge amount adjusting means 24 capable of adjusting the water level at which the immersion water stored in the immersion tank 20 overflows to the wall surface discharge port 23.

The upper side 24b of the discharge amount adjusting means 24 is provided with a concave portion 24c and a convex portion 24d so as to make the upper side 24b uneven. When the water surface of the immersion water stored in the immersion tank 20 reaches a height higher than the concave portion 24c, the immersion water overflows between the convex portion 24d and the adjacent convex portion 24d, and the drainage box is passed through the wall surface discharge port 23. It is drained to 25.

By forming the concave portion 24c and the convex portion 24d on the upper side 24b in this way, the size of the opening of the wall surface discharge port 23, particularly the length in the transport direction of the object to be cleaned is not changed, and the water overflows into the drainage box 25. The cross-sectional area of the flow path of the immersion water drained can be made smaller than that in the case where the concave portion 24c and the convex portion 24d are not provided. As a result, the flow velocity of the immersion water drained in the widest possible range can be increased, and bubbles floating on the water surface of the immersion water can be easily discharged. In addition, the dirt D of the oil and fat component adhering to the object to be cleaned floating on the surface of the immersion water can be easily discharged.

Then, the immersion water overflowing and discharged through the wall surface discharge port 23 flows into the drainage box 25 shown in FIG. 4B, and is shown in FIG. 1 through the drainage pipe (pipe) 22 provided at the bottom of the drainage box 25. It joins the drainage pipe 14 shown and flows into the drainage channel of the facility.

The slope discharge port 12 may be provided with the discharge amount adjusting means 24 along the slope 20a on the carry-in entrance side.

The water level when the immersion water overflows from the slope discharge port 12 and the wall surface discharge port 23 may be the same height or different heights.

As shown in FIG. 1, on the carry-out port 10b side of the immersion tank 20, a circulation port 34 for sucking the immersion water stored in the immersion tank 20 through the circulation pipe 31 by the circulation pump 33 is provided. The circulation port 34 is covered with a strainer 34a that separates the solid dirt D larger than the size of the eyes from the immersion water and selects the size of the solid dirt D flowing to the circulation port 34. The eyes of the strainer 34a are round holes having a predetermined size, for example, a diameter of 2 to 5 mm. The mesh of the strainer 34a is not limited to the round hole, but may be a slit shape or a mesh shape.

The immersion water sucked by the circulation pump 33 from the circulation port 34 through the circulation pipe 31 is discharged to the immersion tank 20 via the fine bubble mixing means 32 provided on the carry-in port 10a side of the immersion tank 20 and circulates.

By discharging the immersion water containing the solid dirt D into the immersion tank 20 via the fine bubble mixing means 32, for example, the water mixed with the fine bubbles B prepared separately is discharged into the immersion tank 20. Compared with the case of supplying, the fine bubbles B can be effectively attached to the solid dirt D and floated in the immersion water.

The fine bubble mixing means 32 is a known device that mixes fine bubbles B into a liquid. For example, a venturi-type fine bubble mixing means in which fine bubbles B are mixed in a liquid by mixing self-absorbing bubbles in a flowing liquid and rapidly changing the pressure in the flow path, bubbles mixed in the liquid are mixed. A high-speed swirling liquid flow type fine bubble mixing means that crushes with a high-speed swirling flow and mixes the fine bubbles B into the liquid. The gas is dissolved in the liquid by applying a pressure higher than the atmospheric pressure, and then the liquid is reduced in pressure. It is a device such as a pressure-dissolving type fine bubble mixing means for mixing fine bubbles B in the gas.

Although the fine bubble mixing means 32 is provided inside the immersion tank 20 in FIG. 1, it may be provided outside the immersion tank 20. When the fine bubble mixing means 32 is provided outside the immersion tank 20, the fine bubble mixing means 32 may be further discharged from the fine bubble mixing means 32 to the immersion water stored in the immersion tank 20 on the carry-in inlet 10a side.

Such a fine bubble mixing means 32 mixes fine bubbles B such as ultra fine bubbles (registered trademark) and fine bubbles (registered trademark) standardized by Japanese Industrial Standards (B8741-1: 2019) into the immersion water. It is a thing.

According to the Japanese Industrial Standards (B8741-1: 2019), Ultra Fine Bubble (registered trademark) is a bubble with a volume-equivalent diameter of less than 1 μm, and Fine Bubble (registered trademark) is a bubble with a volume-equivalent diameter of less than 100 μm. It is stated that there is. The microbubbles B may be microbubbles (fine bubbles having a volume-equivalent diameter of 1 μm or more and less than 100 μm) as long as the effects of the present invention can be exhibited.

As shown in FIG. 1, the shower pipe 35 on the carry-in entrance side branches from the circulation pipe 31. Further, as shown in FIG. 5A, a part of the shower pipe 35 on the carry-in entrance side is on the carry-in inlet 10a side of the immersion tank 20 and is the upper part of the immersion tank 20 on both the left and right sides along the transport direction of the object to be cleaned. Is provided so as to be substantially parallel to and horizontal to the immersion tank 20. A reflector 35d is attached to the shower pipe 35 on the carry-in entrance side so as to be horizontal so as to cover it.

As shown in FIG. 5B, the immersion water mixed with the fine bubbles B jetted from the holes 35c provided in the shower pipe 35 on the carry-in inlet side is jetted toward the reflector 35d. Then, the immersion water mixed with the fine bubbles B reflected by the reflector 35d spreads in the horizontal direction and is sprayed toward the object to be cleaned. (See the solid arrow in FIG. 5 (b).)

As shown in FIG. 1, a shower pipe 36 on the carry-out outlet side branches from the circulation pipe 31. The carry-out outlet side shower pipe 36 is provided with, for example, a nozzle-shaped carry-out outlet side shower nozzle 36a provided above the immersion tank 20. From the carry-out outlet side shower nozzle 36a, the immersion water mixed with the fine bubbles B flowing through the carry-out outlet side shower pipe 36 is jetted toward the object to be cleaned.

Then, the finishing rinse water flows through the connection pipe 40 from the cleaning device 50 shown in FIG. 2, and the finishing rinse water is directed toward the object to be cleaned from the finishing shower nozzle 40a on the carry-out port 10b side of the immersion tank 20 shown in FIG. Is sprayed.

(Configuration of cleaning equipment)
Next, the configuration of the cleaning device 50 will be described.

As shown in FIG. 2, the cleaning device 50 is
The upper outer shell 51 constituting the wall surface of the cleaning chamber of the cleaning device 50,
A lower outer shell 52 that houses various devices and is formed by a frame made of an iron-based material located at the lower part of the upper outer shell 51 and whose outside is partially covered with a sheet metal that is a decorative plate.
The stacked tableware T, which is the object to be washed, is taken out from the tableware basket W, separated one by one, and the tableware T is transported in the transport direction, that is, the carry-in entrance, with the inner surface, which is the surface on which the ingredients of the tableware T are arranged, facing downward. The transport means 60 for transporting the inside of the cleaning device 50 from the 50a to the carry-out port 50b,
Rough cleaning room (cleaning room) 70 for rough cleaning of the object to be cleaned,
The main cleaning room (cleaning room) 80 for main cleaning of the rough-washed object, and
A finishing rinsing room (washing room) 90 for finishing and rinsing the mainly washed object, and
To prepare for.

The rough cleaning room 70 is
The finishing rinsing water stored in the finishing rinsing tank (tank) 91 of the finishing rinsing chamber 90 is sucked and discharged by the finishing rinsing pump 93 through the first finishing rinsing pipe 92, and the finishing rinsing water flowing to the connecting pipe 40 is branched. The first rough cleaning upper nozzle (rough cleaning nozzle) 71a and the first rough cleaning lower nozzle (rough cleaning) are sprayed toward the object to be cleaned to be transported by the transport means 60 through the first rough cleaning pipe 71. Nozzle) 71b and
The cleaning water stored in the rough cleaning tank (tank) 72 is sucked and discharged by the rough cleaning pump (discharge means) 74 through the second rough cleaning pipe 73, and is ejected toward the object to be cleaned transported by the transport means 60. The second rough cleaning upper nozzle (rough cleaning nozzle) 73a and the second rough cleaning lower nozzle (rough cleaning nozzle) 73b,
Detergent supply means (not shown) that supplies detergent to the cleaning water stored in the rough cleaning tank 72,
To prepare for.

The main washing room 80 is
The cleaning water stored in the main cleaning tank (tank) 81 is sucked and discharged by the first main cleaning pump (discharge means) 83 through the first main cleaning pipe 82, and directed toward the object to be cleaned transported by the transport means 60. First main cleaning upper nozzle (main cleaning nozzle) 82a and first main cleaning lower nozzle (main cleaning nozzle) 82b,
The cleaning water stored in the main cleaning tank 81 is sucked and discharged by the first main cleaning pump 83 through the first main cleaning pipe 82, and the second main cleaning high-pressure side pipe 85 branching from the first main cleaning pipe 82. Through the second main cleaning lower nozzle (two-fluid injection nozzle) 86, which is further sucked and discharged by the second main cleaning pump (discharge means) 87 and ejected toward the object to be cleaned transported by the transport means 60. ,
The cleaning water stored in the main cleaning tank 81 is sucked and discharged by the first main cleaning pump 83 through the first main cleaning pipe 82, and the cleaning water is made to flow and jetted to the second main cleaning lower nozzle 86. 2 main cleaning low pressure side pipe 84 and
Detergent supply means (not shown) that supplies detergent to the cleaning water stored in the main cleaning tank 81,
To prepare for.

The second main cleaning pump 87 is set so that the discharge pressure is larger than that of the first main cleaning pump 83. Then, the cleaning water flowing through the second main cleaning high-pressure side pipe 85 is boosted in two stages by the first main cleaning pump 83 and the second main cleaning pump 87, and the first main cleaning pump 83 to the second main cleaning pump 83 to the second main cleaning pump 83. It flows at a higher pressure than the washing water flowing to the washing low pressure side pipe 84.

As shown in FIG. 6, in the second main cleaning lower nozzle 86, the nozzle 86 is discharged by the first main cleaning pump 83 and flows through the second main cleaning low pressure side pipe 84 branching from the first main cleaning pipe 82. The washing water is jetted from the low pressure side nozzle (two-fluid injection nozzle) 86b of the second main washing lower nozzle 86.

Further, the washing water that is boosted and flowed in two stages by the first main washing pump 83 and the second main washing pump 87 through the second main washing high-pressure side pipe 85 that branches from the first main washing pipe 82. Of the second main cleaning lower nozzle 86, the pump is ejected from the high pressure side nozzle (two-fluid injection nozzle) 86a.

That is, it is discharged from the same injection hole (two-fluid injection nozzle) 86c on the tip side of the low-pressure side nozzle 86b (second main cleaning lower nozzle 86) from the first main cleaning pump 83 which is the first discharge means. Both the low-pressure washing water to be discharged and the high-pressure washing water discharged from the second main cleaning pump 87, which is the second discharging means, are injected.

In this way, both the low-pressure washing water and the high-pressure washing water are sprayed from below from the injection hole 86c toward the tableware T, which is the object to be washed, with the inner surface facing downward, which is the surface on which the food is placed. , The object to be cleaned can be washed more effectively.

As shown in FIG. 2, the finishing rinsing chamber 90 is
The finish rinsing water stored in the finish rinsing tank 91 is sucked and discharged by the finish rinsing pump 93 through the first finish rinsing pipe 92, and is ejected toward the object to be cleaned carried by the transport means 60. Nozzle (finishing rinse nozzle) 92a, first finishing rinse lower nozzle (finishing rinse nozzle) 92b, and
By connecting to a water supply facility such as tap water on the facility side and opening the valve 94c, the fresh water supplied through the second finishing rinse pipe 94 is sprayed toward the object to be cleaned transported by the transport means 60. Finishing rinse upper nozzle (finishing rinse nozzle) 94a and second finishing rinse lower nozzle (finishing rinse nozzle) 94b,
To prepare for.

Further, the cleaning system 1 sucks and discharges the finishing rinse water stored in the finishing rinse tank 91 through the first finishing rinse pipe 92 by the finishing rinse pump 93, and discharges the finishing rinse nozzles 71a and 71b, and the finishing shower of the dipping device 10. A connection pipe 40 for flowing to the nozzle 40a is provided.

The washing water stored in the rough washing tank 72 and the main washing tank 81 is heated to a predetermined temperature by, for example, blowing steam supplied by a steam pipe. Then, a temperature sensor or the like electrically connected to the control panel 100 is provided in the rough cleaning tank 72 and the main cleaning tank 81, and when the stored cleaning water reaches a predetermined temperature, the valve provided in the steam pipe is closed. Stop heating.

(Movement of cleaning system)
Next, the operation of the cleaning system 1 of the present embodiment will be described.

The cleaning method performed by the cleaning system 1 of the present embodiment is
A predetermined amount of fresh water is stored in the immersion tank 20, the rough cleaning tank 72, the main cleaning tank 81 and the finishing rinse tank 91, and the fresh water stored in the immersion tank 20, the rough cleaning tank 72 and the main cleaning tank 81 is stored at a predetermined temperature. A preparatory step to prepare for the immersion cleaning step, the rough cleaning step, the main cleaning step, and the finishing rinsing step, which are performed after the next step by driving each device.
The immersion cleaning step of carrying the object to be cleaned into the immersion tank 20 from the carry-in inlet 10a of the immersion device 10 and immersing the object to be cleaned in the immersion water stored in the immersion tank 20 for cleaning.
A transfer step of transferring the object to be cleaned after the immersion cleaning step from the carry-out port 10b of the dipping device 10 to the carry-in port 50a of the cleaning device 50.
A rough cleaning step in which finish rinsing water and cleaning water are sprayed onto the object to be cleaned transferred by the transfer step to perform rough cleaning.
The main cleaning step, in which cleaning water is sprayed onto the object to be cleaned after rough cleaning, and the main cleaning is performed.
A finishing rinsing step in which finishing rinsing water and fresh water are sprayed onto the object to be washed after the main cleaning, and a finishing rinsing step.
A cleaning step of cleaning the dipping device 10 and the cleaning device 50 after cleaning the object to be cleaned, and a cleaning step.
To prepare for.

(Preparation step)
In the preparation step, the valve 26a of the water supply pipe 26 shown in FIG. 1 is opened to store the fresh water used as the immersion water in the immersion tank 20 until the water level reaches a predetermined level, and the water supply pipe (not shown in FIG. 2) is used to store the rough cleaning tank. Fresh water used as washing water is stored in 72 and the main washing tank 81, and fresh water used as finishing rinsing water is stored in the finishing rinsing tank 91 until the water level reaches a predetermined level. After the fresh water stored in the immersion tank 20 reaches a predetermined water level, the valve 26a of the water supply pipe 26 is closed.

After storing water up to a predetermined water level in the immersion tank 20, the rough cleaning tank 72, the main cleaning tank 81 and the finishing rinse tank 91, steam is supplied from the steam pipe to store the immersion water, the rough cleaning tank 72 and the water in the immersion tank 20. The washing water stored in the main washing tank 81 is heated to a predetermined temperature.

The predetermined temperature of the immersion water stored in the immersion tank 20 is, for example, 40 ° C or more and less than 60 ° C, preferably 50 ° C, the predetermined temperature of the cleaning water stored in the rough cleaning tank 72 is approximately 60 ° C, and the main cleaning. The predetermined temperature of the washing water stored in the tank 81 is about 70 degrees C.

The predetermined temperature of the immersion water stored in the immersion tank 20 is, for example, when the object to be cleaned is the tableware T after eating, the fine bubbles B mixed in the immersion water effectively adhere to the dirt D. Is set to a temperature at which it can be separated from the object to be cleaned. This is because, as a result of the experiment, at 60 ° C. or higher, the protein adhering to the object to be cleaned is thermally coagulated and it becomes difficult to separate it from the object to be cleaned. Further, at about 50 degrees C (45 degrees C to 55 degrees C), dirt D adhered to the object to be cleaned, for example, dirt of any component such as fat, starch, or protein, as compared with the immersion water of 40 degrees C or less. This is because D was also able to be effectively separated.

Further, the predetermined temperature of the washing water stored in the rough washing tank 72 and the main washing tank 81 is a temperature for effectively washing away the dirt D of the oil and fat and the starch component which is easy to wash off at about 50 ° C. or higher. ..

The immersion tank 20, the rough cleaning tank 72, and the main cleaning tank 81 are provided with a known temperature sensor electrically connected to the control panel 100 to detect the temperature, and a known electric valve or the like provided in the steam pipe is used. It is configured to control the steam supply.

Then, the detergent is supplied from the detergent supply means (not shown) to the immersion tank 20, the rough cleaning tank 72, and the main cleaning tank 81 so as to have a predetermined concentration. Regarding the supply of the detergent to the rough cleaning tank 72 and the main cleaning tank 81, only the rough cleaning tank 72 or the main cleaning tank 81 may be used. It may be selected according to the component and amount of dirt D adhering to the object to be cleaned.

As the detergent supplied to the immersion tank 20, for example, a low-foaming or effervescent neutral detergent is used, and as the detergent supplied to the rough washing tank 72 and the main washing tank 81, for example, an alkaline detergent is used. The detergent to be used may be appropriately determined according to the component and amount of dirt D adhering to the object to be cleaned.

The detergent supplied to the immersion tank 20 is preferably a detergent containing a surfactant. The diameter corresponding to the volume of the fine bubbles B can be selected according to the size of the fine bubbles B that easily adheres to the dirt D adhering to the object to be cleaned. It is possible to effectively perform immersion cleaning by suppressing the coalescence of the fine bubbles B mixed in the water and maintaining the size of the diameter corresponding to the volume of the fine bubbles B.

The immersion water stored in the immersion tank 20, the washing water stored in the rough cleaning tank 72 and the main cleaning tank 81 is heated to a predetermined temperature, and the immersion water stored in the immersion tank 20 and the rough cleaning tank 72 and the main cleaning tank 81 are heated. After the concentration of the detergent supplied to the washing water stored in the water reaches a predetermined concentration, the circulation pump 33 is driven.

The driven circulation pump 33 sucks the immersion water stored in the immersion tank 20 through the circulation port 34 via the strainer 34a on the carry-out port 10b side, sends the immersion water to the carry-in inlet 10a side of the immersion tank 20 through the circulation pipe 31, and immerses the water. It is discharged to the immersion water stored in the immersion tank 20 via the fine bubble mixing means 32 provided on the carry-in inlet 10a side of the tank 20. At this time, the fine bubbles B are mixed in the immersion water by the fine bubble mixing means 32. The circulation pump 33 is driven for a predetermined time, for example, 20 to 30 minutes, and is mixed in the immersion water stored in the immersion tank 20 until the fine bubbles B are saturated. The circulation pump 33 is continuously driven.

At this time, since the fine bubble mixing means 32 is on the carry-in inlet 10a side and the circulation port 34 is on the carry-out port 10b side, the fine bubble B can be evenly mixed in the immersion water stored in the immersion tank 20.

Further, the immersion water discharged from the circulation pump 33 is ejected from the carry-in inlet side shower nozzle 35a and the carry-out port side shower nozzle 36a toward the immersion tank 20. At this time, the immersion water jetted from the shower nozzles 35a and 36a collides with the water surface of the immersion water to which the detergent is supplied, and the immersion water supplied with the detergent collides with the wall surface of the immersion tank 20. Foam is generated on the surface of the water. At the same time, the finishing rinse pump 93 of the cleaning device 50 is driven to inject the finishing rinse water from the finishing shower nozzle 40a of the dipping device 10 toward the dipping tank 20 through the connection pipe 40.

Then, the finishing rinse pump 93 driven by the cleaning device 50 injects the finishing rinse water in the finishing rinse chamber 90, and the rough cleaning pump 74, the first main cleaning pump 83, and the second main cleaning pump of the cleaning device 50 are injected. 87 is driven to inject cleaning water in the rough cleaning chamber 70 and the main cleaning chamber 80. Further, the valve 94c of the second finishing rinsing pipe 94 is opened to inject fresh water in the finishing rinsing chamber 90.

Finally, the transport means 21 of the dipping device 10 and the transport means 60 of the cleaning device 50 are driven.

(Immersion cleaning step)
After the preparation step is completed, the tableware basket W in which the tableware T that has finished eating, which is the object to be washed, is stacked and housed, the stacking direction of the tableware T is the transport direction of the object to be washed as shown in FIGS. 1 and 7. It is carried in from the carry-in port 10a of the dipping device 10 so as to be in an orthogonal direction, and slides down into the dipping tank 20 along the carry-in port side slope 20a. The tableware basket W that has been slid off is transported in the immersion tank 20 to the carry-out port 10b side by the transport means 21.

The tableware T may be carried in from the carry-in entrance 10a so that the stacking direction of the tableware T is in the direction along the transport direction of the object to be washed.

On the carry-in port 10a side of the immersion tank 20 shown in FIG. 1, most of the dirt D adhering to the object to be cleaned is separated from the object to be cleaned into the immersion water. Therefore, the cleanliness of the inlet 10a side of the immersion water stored in the immersion tank 20 tends to decrease.

The water level of the soaked water whose cleanliness has decreased is raised by the object to be cleaned carried into the soaking tank 20 and the finishing rinse water supplied from the finishing shower nozzle 40a to the soaking tank 20 through the connecting pipe 40. Then, it overflows and is discharged by the slope discharge port 12 and the wall surface discharge port 23 provided on the carry-in port 10a side. Since the immersion water that overflows and is discharged contains a large amount of dirt D separated from the object to be cleaned, the cleanliness of the immersion water stored in the immersion tank 20 can be maintained as much as possible.

As is generally known, the dirt D adhering to the object to be cleaned is moistened and washed off by immersing the object to be cleaned with the dirt D attached to the immersion water at a predetermined temperature for a predetermined time. Can be made easier. The same effect can be obtained in the immersion cleaning step of the present embodiment.

The state of maintaining the cleanliness of the immersion water as much as possible on the carry-in port 10a side of the immersion tank 20 will be described in detail below.

On the carry-in port 10a side of the immersion tank 20, among the stains D separated from the object to be cleaned by the immersion water, the solid stain D contains a stain having a higher density than the immersion water, and the immersion tank 20 has a density higher than that of the immersion water. Easy to sink to the bottom. However, as shown in FIGS. 8A to 8C, in the immersion water in which the fine bubbles B are mixed by the fine bubble mixing means 32, the fine bubbles B adhere to the solid dirt D and become a solid state. Float dirt D.

Although the mechanism has not been elucidated in detail, as shown in FIG. 8 (a), the fine bubbles B floating around the solid dirt D adhering to the tableware T to be cleaned are shown in FIG. 8 (b). A plurality of solid stains D adhere to the surroundings. The plurality of adhered fine bubbles B are combined with other fine bubbles B and bubbles existing in the immersion water, for example, mixed by the cavitation effect of the circulation pump 33, and the solid dirt D is floated by buoyancy. Then, as shown in FIG. 8C, it is said that a plurality of fine bubbles B and bubbles adhering to the solid dirt D separate the solid dirt D from the tableware T and float it.

Most of the solid dirt D thus separated from the tableware T floats on the surface of the immersion water stored in the immersion tank 20 and reaches the surface of the immersion water to which the detergent is supplied from the shower nozzles 35a and 36a. It is captured by the foam generated by the collision of the jetted immersion water and floating on the water surface, or by the foam generated when the immersion water supplied with the detergent collides with the wall surface of the immersion tank 20 and floats on the water surface.

At the same time, among the stains D adhering to the tableware T, a part of the stain D that comes into contact with the foam floating on the surface of the immersion water when the tableware T is immersed in the immersion water stored in the immersion tank 20 is directly converted into foam. Be captured. Further, most of the dirt D separated in the immersion water so as to be peeled off when the tableware T is immersed in the immersion water stored in the immersion tank 20 also rises to the surface of the immersion water due to the adhesion of the fine bubbles B. , Captured by bubbles floating on the surface of the soaking water.

The bubbles floating on the surface of the immersion water that captures the solid dirt D overflow from the slope discharge port 12 and the wall surface discharge port 23 provided on the carry-in port 10a side together with the immersion water stored in the immersion tank 20 and are discharged. ..

As a matter of course, among the stains D adhering to the tableware T, not all the stains D rise to the surface of the immersion water, and some of the stains D accumulate at the bottom of the immersion tank 20 after being separated from the tableware T. ..

Further, among the solid stains D separated from the tableware T which is the object to be cleaned, the fine bubbles B did not adhere to the extent that the solid stains D surfaced, and the fine bubbles B adhered to the water surface of the immersion water. The solid dirt D that floated up to the surface but was not captured by the bubbles floating on the water surface, or was captured but overflowed from the slope discharge port 12 or the wall surface discharge port 23 and was not discharged together with the immersion water, is the immersion tank 20. It floats in the immersion water inside and flows together with the immersion water to the carry-out port 10b side of the immersion tank 20 shown in FIG. 1 together with the transportation of the object to be cleaned.

At this time, the immersion water flowing to the carry-out port 10b side of the immersion tank 20 is suppressed from flowing back to the carry-in port 10a side again by the object to be washed carried in the transport direction.

The immersion water containing the solid dirt D that has flowed to the carry-out port 10b side of the immersion tank 20 is sucked into and discharged to the circulation pump 33 through the circulation port 34 via the strainer 34a and through the circulation pipe 31. Then, the discharged immersion water circulates again to the carry-in port 10a side of the immersion tank 20 via the fine bubble mixing means 32.

At this time, the size of the eyes of the strainer 34a through which the immersion water containing the solid dirt D passes is set so that the solid dirt D having a size easily floated by the fine bubbles B passes through. Therefore, the solid dirt D that cannot pass through the strainer 34a is collected, and the size of the solid dirt D contained in the immersion water flowing to the circulation pipe 31 through the circulation port 34 via the strainer 34a is selected. Then, it can be sucked into the circulation pump 33 together with the immersion water. Further, the strainer 34a separates the solid dirt D larger than its eyes to reduce the solid dirt D contained in the immersion water sucked into the circulation pump 33, and the solid state to the circulation pump 33. It is possible to suppress the clogging of the dirt D and prolong the life.

Further, the size of the eyes of the strainer 34a is set so that the amount of solid dirt D contained in the immersion water flowing to the circulation pipe 31 is a predetermined ratio to the immersion water per unit volume. ing. That is, since the fine bubbles B are not mixed in the portion occupied by the solid dirt D, a predetermined amount of fine bubbles are discharged into the immersion water stored in the immersion tank 20 via the fine bubble mixing means 32. The amount of solid dirt D contained in the immersion water flowing into the circulation pipe 31 is limited by the eyes of the strainer 34a so that B is mixed. That is, it is possible to suppress the amount of fine bubbles B mixed in the immersion water discharged to the immersion tank 20 from being reduced by the solid dirt D as much as possible.

Further, as for the size of the eyes of the strainer 34a, the size of the solid dirt D is selected so that the immersion water of the shower nozzles 35a and 36a can pass through the hole to be sprayed. As a result, the solid dirt D can be directly injected from the shower nozzles 35a and 36a together with the immersion water onto the bubbles floating on the water surface of the immersion water without clogging.

Then, the immersion water containing the solid dirt D is sucked into the circulation pump 33 and discharged, and the fine bubbles B are mixed into the immersion water by the fine bubble mixing means 32 on the carry-in port 10a side of the immersion tank 20. As a result, for example, as compared with the case where water mixed with fine bubbles B prepared separately is supplied to the immersion tank 20, the fine bubbles B can be effectively attached to the solid dirt D contained in the immersion water. can. Then, the immersion water containing the solid dirt D to which the fine bubbles B are effectively adhered is discharged to the carry-in port 10a side of the immersion tank 20.

Further, when the solid dirt D contained in the immersion water is discharged by the circulation pump 33, the solid dirt D contained in the immersion water is finely sheared by the discharge pressure of the circulation pump 33 to generate fine bubbles B. The size can be set so that it can be easily levitated when attached. At this time, the solid dirt D finely sheared by the circulation pump 33 is softened because it is moistened by the immersion water, and is easily sheared.

Then, the solid dirt D in the immersion water can be floated on the water surface of the immersion water on the carry-in port 10a side of the immersion tank 20 and captured by the bubbles floating on the water surface of the immersion water on the carry-in inlet 10a side of the immersion tank 20. .. The foam that captures the solid dirt D floating on the surface of the immersion water overflows from the slope discharge port 12 and the wall surface discharge port 23 provided on the carry-in port 10a side together with the immersion water stored in the immersion tank 20 and is discharged.

At this time, bubbles are mixed in the immersion water containing the solid dirt D discharged through the fine bubble mixing means 32 due to the cavitation effect when the fine bubbles B are discharged by the circulation pump 33. Further, bubbles in which the fine bubbles B are bonded to each other are also mixed in the immersion water containing the solid dirt D discharged through the fine bubble mixing means 32.

Since the immersion water mixed with the bubbles is discharged on the carry-in port 10a side of the immersion tank 20, it is possible to promote the floating of the solid dirt D to which the fine bubbles B adhere and float. At the same time, the bubbles contained in the discharged immersion water are combined with the fine bubbles B adhering to the solid dirt D to increase the buoyancy of the solid dirt D and increase the floating speed of the solid dirt D. Can be done.

Further, the immersion water containing the solid dirt D circulating in the circulation path 30 is sprayed from the shower nozzle 35a on the carry-in inlet side and the shower nozzle 36a on the carry-out outlet side, so that the immersion water floats on the water surface of the immersion water. The solid dirt D contained in the water can be directly captured.

As a result, as long as the immersion water stored in the immersion tank 20 circulates, the solid dirt D is collected by the strainer 34a due to its size, and overflows from the slope discharge port 12 and the wall surface discharge port 23. The cleanliness of the immersion water stored in the immersion tank 20 can be maintained as much as possible, and the immersion cleaning with the immersion water can be effective.

In particular, the immersion water on the carry-in port 10a side contains a large amount of liquid stain D and solid stain D separated from the object to be cleaned at the same time as being immersed in the immersion water. In addition, the immersion water containing the solid dirt D circulates to the carry-in port 10a one after another via the fine bubble mixing means 32. Therefore, among all the immersion water stored in the immersion tank 20, the cleanliness of the immersion water on the carry-in port 10a side is most likely to decrease.

The immersion device 10 of the present embodiment overflows and discharges the immersion water on the carry-in port 10a side, which is most likely to deteriorate in cleanliness, by the slope discharge port 12 and the wall surface discharge port 23 provided on the carry-in port 10a side. , Can be discharged intensively on the carry-in port 10a side. Then, the solid stain D contained in the entire immersion water is reduced to prevent the solid stain D from reattaching to the object to be cleaned in the immersion water, and the solid stain D floating in the immersion water is decomposed. It is possible to suppress the decrease in the detergency of the immersion water. That is, the object to be cleaned can be effectively washed.

The detergent supplied to the immersion tank 20 is premised on a low-foaming or foaming detergent, but the detergent contained in the detergent is used to effectively perform immersion cleaning and generate bubbles on the surface of the immersion water. This is because the generated foam captures the solid dirt D floated by the fine bubbles B and effectively discharges it together with the immersion water overflowing from the slope discharge port 12 and the wall surface discharge port 23.

Even if bubbles are not generated on the water surface of the immersion water, the dirt D that has risen to the water surface of the immersion water or near the water surface can be overflowed from the slope discharge port 12 and the wall surface discharge port 23 and discharged. For example, the detergent to be supplied may be non-foaming. Alternatively, it is not necessary to supply the detergent to the immersion water.

In that case, the dirt D that has risen to the water surface of the immersion water or near the water surface is not captured by the bubbles floating on the water surface of the immersion water, and is immersed from the slope discharge port 12 and the wall surface discharge port 23 provided on the carry-in port 10a side. Overflow with water and drain.

Of course, among the solid stains D separated from the tableware T, which is the object to be cleaned, the fine bubbles B did not adhere to the extent that the solid stains D floated, or the water surface of the immersion water or near the water surface floated. However, the solid dirt D that overflowed from the slope discharge port 12 and the wall surface discharge port 23 and was not discharged together with the immersion water sucked the immersion water through the circulation port 34 via the strainer 34a and sucked the immersion water by the circulation pump 33. Therefore, the solid dirt D flows to the carry-out port 10b side. In addition, it flows together with the immersion water to the carry-out port 10b side of the immersion tank 20 shown in FIG. 1 together with the transportation of the object to be cleaned.

In that case, the solid stain D circulates in the circulation path 30 together with the immersion water, and the fine bubbles B are effective for the solid stain D, as in the case where the detergent is supplied to the immersion water stored in the immersion tank 20. It adheres to the surface and floats to the surface of the immersion water or near the surface of the water. Then, it overflows from the slope discharge port 12 and the wall surface discharge port 23 provided on the carry-in port 10a side together with the immersion water and is discharged.

Conventionally, as a dipping device for dipping and cleaning an object to be cleaned, bubbles, for example, bubbles having a diameter of several millimeters are generated from a bubble generating device provided at the bottom of the dipping tank, and the bubbles are used to soak the object to be cleaned in the immersion water. There was something that tried to improve the cleaning effect. However, in such an immersion device, the diameter of the bubbles generated from the bubble generator is large, and the bubbles float, and when they reach the water surface of the immersion water, the water surface of the immersion water is greatly rippling.

If the water surface of the immersion water is greatly rippling, the bubbles generated by the detergent floating on the water surface of the immersion water cannot exist for a long time, and the dirt D captured by the bubbles is scattered in the immersion water again. ..

As in the immersion device 10 of the present embodiment, the bubbles mixed in the immersion water are made into fine bubbles B, so that the ripple of the immersion water stored in the immersion tank 20 is suppressed, the water surface is stabilized, and the immersion is performed. The foam that captures the solid dirt D that has floated up in the water can be stably overflowed and discharged from the slope discharge port 12 and the wall surface discharge port 23 provided on the carry-in port 10a side together with the immersion water.

Further, the bubbles generated by the conventional dipping device have a large bubble diameter and rise to the water surface at the same time as the bubbles are generated. However, since the fine bubbles B generated by the immersion device 10 of the present invention are, for example, fine bubbles (registered trademark), the speed at which they rise to the water surface is slow and they float in the immersion water. Then, the fine bubbles B floating in the immersion water adhere to the surface of the object to be cleaned so as to be separated from the immersion water. As a result, it is possible to prevent the dirt D contained in the immersion water separated from the object to be cleaned from reattaching to the object to be cleaned.

Further, it is generally said that by mixing the fine bubbles B in the immersion water, the fine bubbles B have a function of adsorbing the dirt D of the oil and fat component and removing it from the object to be cleaned. The same applies to the dipping device 10 in the present embodiment, since the fine bubbles B are mixed in the dipping water stored in the dipping tank 20, so that the dirt D of the oil and fat component adhering to the object to be cleaned immersed in the dipping water is removed. It can be effectively separated, and the separated dirt D of the oil and fat component can be made to float on the water surface of the immersion water.

The dirt D of the oil and fat component floating on the water surface of the immersion water is discharged from the slope discharge port 12 and the wall surface discharge port 23 together with the bubbles floating on the water surface of the immersion water and the overflowing immersion water. As a result, the immersion water stored in the immersion tank 20 is kept as clean as possible, and the oil and fat component stain D reattaches to the object to be cleaned in the immersion water, and the oil and fat component stain D in the immersion water has the cleaning power of the immersion water. Can be suppressed from being lowered.

Further, on the carry-out port 10b side of the immersion tank 20, the finishing rinse water having a higher cleanliness than the immersion water stored in the immersion tank 20 is sprayed from the finishing shower nozzle 40a to the immersion tank 20 through the connection pipe 40. The highly clean finish rinse water is mixed with the immersion water at the carry-out port 10b of the immersion tank 20 and is sucked by the circulation pump 33 through the circulation port 34 of the immersion tank 20.

Then, it is discharged by the circulation pump 33, and is discharged into the immersion water stored in the immersion tank 20 through the circulation pipe 31 via the fine bubble mixing means 32. As a result, the fine bubbles B are mixed into the water having a higher cleanliness than the immersion water stored in the immersion tank 20, and the object to be cleaned is immersed and washed with the immersion water having a higher cleanliness on the carry-in inlet 10a side of the immersion tank 20. It can be performed.

Further, a part of the tableware T stacked and stored in the tableware basket W transported by the transport means 21 is located above the surface of the immersion water stored in the immersion tank 20, and is not immersed in the immersion water, that is, half-submerged. It is transported in the state of. Immersion water is sprayed from above by the shower nozzle 35a on the carry-in inlet side and the shower nozzle 36a on the carry-out port side to the tableware T which is conveyed in a state where a part of the tableware T is not soaked. Then, the dirt D adhering to the tableware T is removed by the jet pressure of the immersion water, the flowing immersion water, and the fine bubbles B mixed in the immersion water, and a part of the tableware T located above the water surface of the immersion water is removed. Can be moistened.

Further, since the water level of the immersion water stored in the immersion tank 20 is the water level at which a part of the tableware T, which is the object to be washed, which is stacked and stored in the tableware basket W, is transported without being immersed, the tableware T is always immersed. It is possible to reduce the amount of water used for immersion cleaning, the energy for heating the water, and the amount of detergent to be supplied, as compared with the immersion device transported in the state of being in the state.

Further, if the immersion water is sprayed from above while a part of the tableware T is not immersed, the tableware T can be rotated in the tableware basket W. Thereby, the separation of the dirt D adhering to the tableware T can be promoted.

The tableware T whose portion not immersed in the immersion water has been washed by the immersion water ejected from the shower nozzle 36a on the carry-out outlet side is conveyed by the transport means 21 along the slope 20b on the carry-out outlet side and is conveyed from the water surface of the immersion water. Will be located above.

When being transported along the carry-out outlet side slope 20b, the tableware T passes through the water surface on which bubbles float. As a result, the foam can be directly attached to the surface of the tableware T, and the dirt D adhering to the surface of the tableware T can be captured by the foam.

Then, while being conveyed by the conveying means 21 above the water surface of the immersion water, it is conveyed while being washed away by the finishing rinse water jetted from the finishing shower nozzle 40a.

As a result, the solid stain D contained in the immersion water ejected from the carry-in inlet side shower nozzle 35a and the carry-out outlet side shower nozzle 36a, the liquid stain D contained in the immersion water adhering to the object to be cleaned, and the subject. The foam that captured the solid dirt D adhering to the cleaning object, and the dirt D adhering to the object to be cleaned that could not be separated only by immersing it in the immersion water were washed away, and the rough cleaning step, which is a later step, is a book. The cleaning effect in the cleaning step and the finishing rinsing step can be improved.

Further, the immersion water ejected from the shower nozzle 35a on the carry-in port side and the shower nozzle 36a on the carry-out port side causes bubbles that capture the solid dirt D floating on the water surface on the carry-in port 10a side of the immersion water stored in the immersion tank 20. It is possible to suppress the flow to the carry-out port 10b side. As a result, the bubbles floating on the water surface of the immersion water on the carry-in port 10a side of the immersion tank 20 can be more effectively discharged at the slope discharge port 12 and the wall surface discharge port 23.

Further, since the finishing rinse water sprayed in the finishing rinse step performed by the cleaning device 50 is used to wash away the cleaning water adhering to the object to be cleaned in the main cleaning step, the cleanliness does not significantly deteriorate. Then, by injecting the finishing rinse water from the finishing shower nozzle 40a of the dipping device 10, the foam and the solid form that capture the solid dirt D adhering to the object to be cleaned with water having a higher cleanliness than the dipping water. Dirt D and the immersion water having a low degree of cleanliness can be washed away, and the object to be cleaned can be effectively washed.

Then, the tableware basket W in which the tableware T, which is the object to be washed, which has been transported by the transport means 21 over a predetermined time and has been immersed and washed for a predetermined time, is stacked and stored is extruded by the tableware basket W which is sequentially transported. It is carried out from the carry-out port side slope 20b to the carry-out port 10b so as to be carried out.

In the present embodiment, the tableware basket W in which the tableware T, which is the object to be cleaned and is immersed in the immersion water stored in the immersion tank 20, is stacked and housed, is immersed and washed in a half-submerged state, but the water is stored in the immersion tank 20. The water level of the immersion water may be raised, and the tableware T may be immersed and washed while being transported in a completely submerged state.

The fine bubble mixing means 32 may be attached to a position immediately after the immersion water is discharged from the circulation pump 33. As a result, more fine bubbles B are mixed in the immersion water ejected from the carry-in inlet side shower nozzle 35a and the carry-out outlet side shower nozzle 36a, and the immersion water jetted from the carry-in inlet side shower nozzle 35a and the carry-out outlet side shower nozzle 36a. With water, the immersion water in which fine bubbles B are mixed is sprayed onto a part of the tableware T located above the water surface of the immersion water to promote the separation of the dirt D adhering to the tableware T and the shower nozzle on the carry-in entrance side. Fine bubbles B can be added to the immersion water stored in the immersion tank 20 where the 35a and the shower nozzle 36a on the carry-out port side are located to perform immersion cleaning more effectively. However, if it passes through the fine bubble mixing means 32, the pressure when the immersion water flows may decrease, so it is necessary to design so that a sufficient pressure can be secured.

(Transfer step)
The tableware basket W for stacking and accommodating the tableware T, which is the object to be cleaned after the dipping and washing step, is conveyed to the carry-out port 10b of the dipping device 10 shown in FIG. The tableware basket W transported to the carry-out port 10b is picked up, and the tableware T stacked and stored is taken out from the tableware basket W.

Then, the stacked tableware T taken out is set in a known supply device (not shown) that separates the stacked tableware T one by one, and the inner surface, which is the surface on which the ingredients of the tableware T are arranged, faces downward. The sheets are separated one by one and supplied to the transport means 60 of the cleaning device 50 shown in FIG. The tableware T separated one by one with the inner surface facing downward is transported in the transport direction by the transport means 60, and is carried into the cleaning chamber from the carry-in inlet 50a of the cleaning device 50.

(Rough cleaning step)
The tableware T whose inner surface is directed downward, which is conveyed by the conveying means 60, is conveyed to the rough cleaning chamber 70, and the finishing rinse water is sprayed from above through the first rough cleaning upper nozzle 71a, and the first rough cleaning is performed from below. Finishing rinse water is sprayed from the cleaning nozzle 71b. Further, it is conveyed in the rough cleaning chamber 70, and the cleaning water is ejected from the second rough cleaning upper nozzle 73a from above, and the cleaning water is ejected from the lower rough cleaning lower nozzle 73b from below.

As a result, the finishing rinse water and the washing water can be sprayed onto the stain D adhering to the tableware T which is wet and easily separated in the dipping and washing step, and the stain D adhering to the tableware T can be washed away.

(Main cleaning step)
After the rough cleaning step, the tableware T conveyed by the conveying means 60 with the inner surface facing downward is conveyed to the main cleaning chamber 80, and the cleaning water is sprayed from above from the first main cleaning upper nozzle 82a. Cleaning water is sprayed from below from the first main cleaning lower nozzle 82b. Further, it is conveyed in the main washing chamber 80, and the washing water is sprayed from below from the second main washing lower nozzle 86.

Since the second main cleaning lower nozzle 86 is a two-fluid injection nozzle, the second main cleaning lower nozzle 86 injects a wider range of cleaning water than when the cleaning water is injected only at high pressure. It is possible to wash a wide range of the object to be cleaned more effectively.

Thereby, after the rough washing is performed by the rough washing step, the dirt D stuck to the inner surface of the tableware T, for example, the dirt D of the starch component which is crushed cooked rice can be washed away.

(Finishing rinse step)
The tableware T whose inner surface is directed downward, which has been conveyed by the conveying means 60 after the main cleaning step, is conveyed to the finishing rinsing chamber 90, and the finishing rinsing water is sprayed from above from the first finishing rinsing nozzle 92a. , Finishing rinse water is sprayed from the first finishing rinse lower nozzle 92b from below. Further, it is conveyed in the finishing rinsing chamber 90, and fresh water is jetted from the second finishing rinsing upper nozzle 94a from above, and fresh water is sprayed from the lower finishing rinsing lower nozzle 94b.

As a result, the washing water adhering to the tableware T can be washed away with respect to the tableware T which has washed away the dirt D adhered by the rough washing step and the main washing step.

Then, the tableware T washed in the finishing rinsing step is carried out from the carry-out port 50b, stacked, and stored in the tableware basket W. The tableware basket W in which the tableware T is stacked and stored is transported to the equipment for which the disinfection process is performed, and is disinfected and stored until it is used the next day.

(Cleaning step)
After the finishing rinsing step of the object to be cleaned is completed and all the objects to be cleaned are removed from the cleaning device 50, the circulation pump 33 of the dipping device 10, the rough cleaning pump 74 of the cleaning device 50, and the second The main cleaning pump 83 of 1, the second main cleaning pump 87, and the finishing rinsing pump 93 are stopped, and the valve 94c of the second finishing rinsing pipe 94 is closed.

Then, the valve 37a in the drainage pipe 37 of the immersion device 10 is opened to drain the immersion water stored in the immersion tank 20 through the discharge port 38, and the valve 39a in the drainage pipe 39 branching from the circulation pipe 31 is opened to circulate. The immersion water remaining in the road 30 is drained. Then, the washing water stored in the rough washing tank 72 and the main washing tank 81 and the finishing rinse water stored in the finishing rinsing tank 91 are provided in the drainage pipe connected to the rough washing tank 72, the main washing tank 81 and the finishing rinsing tank 91. Open the valve and drain to the drainage facility on the facility side.

After draining the immersion water stored in the immersion tank 20, the cleaning water stored in the rough cleaning tank 72 and the main cleaning tank 81, and the finishing rinse water stored in the finishing rinse tank 91, fresh water supplied from the water supply pipe on the equipment side. Clean each part using.

At this time, since the solid stain D contained in the immersion water is reduced in the immersion cleaning step, the solid stain D remaining on the bottom of the immersion tank 20 after draining the immersion water stored in the immersion tank 20 is removed. The amount can be reduced as compared with the case where the immersion cleaning is performed with the immersion water in which the fine bubbles B are not mixed.

Further, by mixing the fine bubbles B in the immersion water, the fine bubbles B adhere to the inner wall surface of the immersion tank 20 and the transport means 21, and the dirt D separated from the tableware T to be cleaned in the immersion cleaning step is removed from the immersion tank. It is possible to suppress the adhesion to the inner wall surface of the 20 and the transport means 21. Then, after draining the immersion water stored in the immersion tank 20, the amount of solid dirt D that remains attached to the inner wall surface of the immersion tank 20 or the transport means 21 can be reduced.

Further, the dirt D of the oil and fat component adhering to the tableware T which is the object to be cleaned in the immersion cleaning step is separated by the fine bubbles B so as to float on the water surface of the immersion water, and the oil and fat component floating on the water surface of the immersion water. Dirt D is discharged together with the immersion water overflowing from the slope discharge port 12 and the wall surface discharge port 23.

As a result, the amount of dirt D of the oil and fat component accumulated in the bottom of the immersion tank 20 for which the immersion water has been drained in the cleaning step is reduced as compared with the case where the immersion cleaning is performed with the immersion water in which the fine bubbles B are not mixed. Can be done. Further, it is possible to reduce the dirt D of the oil and fat component adhering to the inner wall surface of the immersion tank 20 and the transport means 21.

As a result, the load on the worker who cleans the immersion tank 20 can be reduced. Further, as a result, after a further time has passed after the cleaning step, the drainage pipe 14, the drainage pipe 22, the circulation pipe 31, the carry-in inlet side shower pipe 35, the carry-out outlet side shower pipe 36, the drainage pipe 37, and the drainage pipe 39 are inserted. It is possible to suppress the generation of the odor generated by the remaining solid dirt D and reduce the odor drifting in the facility when the preparation step is performed next time.

In the present embodiment, the stacked tableware T is taken out from the tableware basket W and set in a known supply device in the transfer step, but the washing device 50 is used for cleaning while the tableware T is stacked and housed in the tableware basket W. It is also possible to use a cleaning device for performing known separation cleaning (Japanese Patent Laid-Open No. 2008-173258). As a result, the tableware T, which is the object to be washed, can be washed while being housed in the tableware basket W without removing the tableware T from the tableware basket W.

1 Cleaning system 10 Immersion device 10a Carry-in port 10b Carry-out port 11 Outer body 12 Slope discharge port (discharge port)
13 Drainage ditch 14 Drainage piping (piping)
20 Immersion tank 20a Slope on the carry-in entrance side (slope)
20b Slope on the carry-out exit side (slope)
21 Transport means 22 Drainage piping (piping)
22a Valve 23 Wall discharge port (discharge port)
24 Discharge amount adjusting means 24a Adjusting hole 24b Upper side 24c Concave 24d Convex 25 Drainage box 26 Water supply pipe 26a Valve 27 Water supply port 30 Circulation passage 31 Circulation pipe (piping)
31a Valve 32 Fine bubble mixing means 33 Circulation pump (discharge means)
34 Circulation port 34a Strainer 35 Carry-in entrance side shower piping (piping)
35a Carry-in entrance side shower nozzle (shower nozzle)
35b Valve 35c Hole 35d Reflector 36 Shower outlet piping (piping)
36a Shower nozzle on the carry-out outlet side (shower nozzle)
36b Valve 37 Drainage piping (piping)
37a Valve 38 Outlet 39 Drainage piping (piping)
39a Valve 40 Connection piping 40a Finishing shower nozzle (shower nozzle)
40b Valve 50 Cleaning device 50a Carry-in port 50b Carry-out port 51 Upper outer shell 52 Lower outer body 60 Transport means 70 Rough cleaning room (cleaning room)
71 First rough cleaning pipe 71a First rough cleaning upper nozzle (rough cleaning nozzle)
71b First rough cleaning lower nozzle (rough cleaning nozzle)
71c valve 72 rough cleaning tank (tank)
73 Second rough cleaning pipe 73a Second rough cleaning upper nozzle (rough cleaning nozzle)
73b Second rough cleaning lower nozzle (rough cleaning nozzle)
74 Rough cleaning pump (discharge means)
80 washing room (washing room)
81 cleaning tanks (tanks)
82 First main cleaning pipe 82a First main cleaning upper nozzle (main cleaning nozzle)
82b First main cleaning lower nozzle (main cleaning nozzle)
83 First main cleaning pump (discharge means)
84 Second main cleaning low pressure side piping 85 Second main cleaning high pressure side piping 86 Second main cleaning lower nozzle (two-fluid injection nozzle)
86a High pressure side nozzle (two-fluid injection nozzle)
86b Low pressure side nozzle (two-fluid injection nozzle)
86c injection hole (two-fluid injection nozzle)
87 Second main cleaning pump (discharge means)
90 Finishing rinse room (washing room)
91 Finishing rinse tank (tank)
92 First finish rinse pipe 92a First finish rinse nozzle (finish rinse nozzle)
92b First finishing rinse bottom nozzle (finishing rinse nozzle)
93 Finishing rinse pump (discharge means)
94 Second finish rinse pipe 94a Second finish rinse Nozzle (finish rinse nozzle)
94b Second finishing rinse bottom nozzle (finishing rinse nozzle)
94c Valve 100 Control panel B Fine bubbles D Dirt T Tableware (object to be washed)
W tableware basket

Claims (11)

The object to be cleaned is immersed in the immersion water in which the fine bubbles stored in the immersion tank are mixed, and the object to be cleaned immersed in the immersion water is conveyed by the transport means, and the fine bubbles mixed in the immersion water are used. , Including a dip cleaning step of performing dip cleaning to separate solid stains adhering to the object to be cleaned.
Of the stains separated in the immersion cleaning step, solid stains having a higher density than the immersion water are floated by the fine bubbles on or near the water surface of the immersion water and have a higher density than the immersion water. A cleaning method comprising overflowing solid dirt together with the immersion water and discharging it from the immersion tank. Immersion water containing solid dirt stored in the immersion tank is sucked in by a discharge means through a circulation port provided on the carry-out outlet side of the immersion tank to carry out the object to be cleaned.
The immersion water sucked by the discharge means is circulated by being discharged to the carry-in inlet side of the immersion tank to carry in the object to be cleaned via the fine bubble mixing means for mixing the fine bubbles into the immersion water. The cleaning method according to claim 1. The cleaning method according to claim 2, wherein the immersion water sucked into the discharge means through the circulation port contains solid dirt that passes through the strainer over the circulation port. Detergent is supplied to the immersion water,
Solid stains having a higher density than the immersion water floated by the fine bubbles in the immersion water are captured by the foam generated by supplying the detergent, and the solid stain captured by the foam is captured by the foam. The cleaning method according to any one of claims 1 to 3, wherein the detergent overflows together with the immersion water and is discharged from the immersion tank. 3. The cleaning method according to any one. An immersion tank that stores a predetermined amount of immersion water, immerses the object to be cleaned, and performs immersion cleaning to separate solid stains adhering to the object to be cleaned from the object to be cleaned.
At least a part of the immersion water stored in the immersion tank is immersed, and the object to be cleaned is transported from the carry-in inlet side of the immersion tank to carry in the object to be cleaned to the carry-out port side of the immersion tank to carry out the object to be cleaned. Transport means and
A fine bubble mixing means that mixes fine bubbles in the passing liquid,
A discharge means for circulating the immersion water by discharging the immersion water sucked from the circulation port provided in the immersion tank on the carry-out port side into the immersion tank via the fine bubble mixing means.
An outlet for draining water by overflowing the immersion water stored in the immersion tank,
Equipped with
Of the stains separated from the object to be cleaned, solid stains having a higher density than the immersion water are floated on or near the water surface of the immersion water by the fine bubbles, and the solid state has a higher density than the immersion water. A cleaning system characterized in that the dirt is overflowed from the discharge port together with the immersion water and discharged from the immersion tank. Cover the circulation port with a strainer and
The cleaning system according to claim 6, wherein the immersion water sucked into the discharge means through the circulation port contains solid dirt that passes through the strainer over the circulation port. Further provided with a detergent supply means for supplying detergent to the immersion water stored in the immersion tank,
Solid stains having a higher density than the immersion water floated by the fine bubbles in the immersion water are captured by the foam generated by supplying the detergent, and the solid stain captured by the foam is immersed. The cleaning system according to claim 6 or 7, wherein the cleaning system overflows from the discharge port together with water and is discharged from the immersion tank. The immersion water is discharged into the immersion tank via the fine bubble mixing means on the carry-in port side of the immersion tank.
The cleaning system according to any one of claims 6 to 8, wherein the discharge port is located on the carry-in port side of the immersion tank. The cleaning system according to any one of claims 6 to 9, wherein the discharge port has a comb-shaped discharge amount adjusting means for reducing the cross-sectional area of the flow path of the discharge port. A transport means for transporting tableware, which is the object to be washed that has been soaked and washed,
The main washing tank that stores a predetermined amount of washing water, and
A first discharging means for sucking and discharging the washing water stored in the main washing tank, and
A second discharging means that sucks the washing water stored in the main washing tank and discharges it at a higher pressure than that discharged from the first discharging means.
A nozzle that injects both the washing water discharged from the first discharging means and the washing water discharged from the second discharging means from the same injection hole to wash the dishes to be conveyed by the conveying means. ,
The cleaning system according to any one of claims 6 to 10, further comprising a cleaning apparatus having the above.

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