JP4043627B2 - Chemical solution supply method and apparatus used therefor - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a chemical solution supply method and a chemical solution supply apparatus used therefor when performing a process with a first diluted chemical solution and a process with a second diluted chemical solution in stages on an object to be processed.
[0002]
[Prior art]
When a chemical solution diluted to a predetermined concentration is applied to an object to be processed and any processing is performed on the object to be processed due to its medicinal effect, a diluted chemical solution prepared in advance is supplied to the processing apparatus and applied to the object to be processed. In addition, the treatment apparatus is provided with a chemical supply device for performing the treatment with the first diluted chemical solution and the treatment with the second diluted chemical solution, and from the chemical supply device, in the middle of the supply path of the liquid for dilution such as water and hot water Or the method of adding a chemical | medical agent of a concentration chemical | medical agent or solid (powder) into the storage tank of a processing apparatus, preparing the diluted chemical | medical solution of a predetermined density | concentration, and giving to a to-be-processed object is used widely.
[0003]
Processing equipment with such a chemical supply device includes automatic dishwashers for washing dishes, commercial washing machines for washing clothes, blankets, etc. and dryers, textiles such as cloth. Treatment equipment for dyeing and washing, wastewater treatment equipment for industrial wastewater, etc., scale inhibitor supply equipment for cooling towers, fertilizer replenishing equipment for hydroponics, washing equipment for vehicles, aircraft, etc., for dairy farming Cleaning equipment for milking equipment, cleaning equipment for food and foodstuffs, various cleaning equipment in food processing factories, cleaning equipment for electronic parts, metal processing parts, cleaning equipment for machinery, bottle cleaning equipment for alcoholic beverages and beverages It is done.
[0004]
Among these, the processing process and the chemical solution supply system will be described by taking a commercial automatic dishwasher as an example.
[0005]
The above-mentioned automatic dishwashers for business use are widely used in hotels, restaurants, schools, employee cafeterias, restaurants, food processing factories, etc., structurally, food type, under counter type, door type, rack type conveyor Type, flight conveyor type, etc.
[0006]
As shown in FIG. 8, the door-type automatic business dishwasher is generally formed in the washing space, and the dish 1 is held in the basket-like rack 2 in the washing space. It comes to load with. A pair of upper and lower cleaning nozzles 3 and a pair of upper and lower rinse nozzles 4 are also provided above and below the rack 2, and the cleaning liquid is discharged from the cleaning nozzle 3 to clean the tableware 1 for a predetermined time. After the stop, a series of operations of discharging the rinsing liquid from the rinsing nozzle 4 and rinsing are automatically performed.
[0007]
The cleaning liquid is supplied to the cleaning nozzle 3 by pumping the cleaning liquid stored in the cleaning tank 5 upward via a transfer pump 7 provided in the transfer pipe 6. Moreover, the supply of the rinsing liquid to the rinsing nozzle 4 is performed by pressure-feeding hot water heated by the hot water supply device 8 attached to the washing machine upward through a liquid supply pump 10 provided in the hot water supply pipe 9. Is done by.
[0008]
In the above washing machine, if mere warm water is used as the rinsing liquid, there are problems such as poor drying and formation of water spots after drying. Dry finishes (so-called “rinse agents”) are added at very low concentrations. The rinsing agent is added by pumping the rinsing agent by a predetermined amount from the high-concentration rinsing agent (liquid) supply source 11 by the rinsing pump 12 set so as to be linked to the operation of the feed pump 10. This is done by injecting into 9.
[0009]
On the other hand, the cleaning liquid is conventionally prepared by opening and closing a manual valve (not shown) provided in a pipe 9a extending from the hot water supply pipe 9 so as to store hot water in the cleaning tank 5, The process has been carried out by dissolving or diluting the cleaning agent (solid or liquid).
[0010]
However, recently, hot water supply to the washing tank 5 is simulated by performing a rinsing process in order to make the washing machine more compact, improve functionality, and simplify operability. There are many washing machines that employ a method in which the water is discharged from the rinsing nozzle 4 and stored in the washing tank 5 by flowing down.
[0011]
[Problems to be solved by the invention]
However, in the pseudo rinsing process, when the feed pump 10 is operated, the rinse pump 12 that is linked to the supply pump 10 is set to operate simultaneously or after a certain time lag, as described above. Although the purpose is to supply only hot water to the tank 5, the rinse agent is injected and supplied.
[0012]
By the way, instructions are given by switching between three stages of "hot water supply", "washing (including rinsing)" and "off" by lever operation, and opening and closing of the door, and other operations are set to proceed automatically In the door type automatic dishwasher for business use, the liquid supply pump 10 is operated to supply hot water to the washing tank 5 so as to be automatically controlled according to a flowchart as shown in FIG. 9, for example. Thus, it can be seen that in both the hot water supply process and the rinsing process, the rinse pump 12 operates to inject the rinse agent into the washing machine.
[0013]
Therefore, if this is left as it is, the rinse agent injected in the hot water supply process is wasted and is not economical.
[0014]
Therefore, in the hot water supply process (pseudo rinsing process) prior to the cleaning process, it may be possible to turn off the power of the rinse pump 12 only at that time. However, the operation of opening and closing the manual valve during hot water supply is omitted. However, it is not preferable to add a new operation instead of this, because it goes against the simplification of operation.
[0015]
This problem is a problem to be solved also in other types of automatic dishwashers for business use, and other various cleaning devices, processing devices, and the like.
[0016]
This invention is made | formed in view of such a situation, In the chemical | medical solution supply method in the process which performs the process by a 1st dilution chemical | medical solution, and the process by a 2nd dilution chemical | medical solution in steps, a 1st dilution chemical | medical solution is By introducing the dilution liquid (water, warm water, etc.) for preparation using the second dilution liquid supply means and introducing only the dilution liquid without injecting the chemical liquid for the second dilution chemical liquid It is an object of the present invention to provide a chemical solution supply method and an apparatus used therefor.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, the present invention holds an object to be processed in a state in which liquid can pass in a vertical direction above a storage tank whose upper surface is open, and stores the object to be processed in the storage tank. The first diluted chemical solution is transferred to the vicinity of the object to be processed via the transfer pump, and the first process is performed to discharge the liquid toward the object to be processed. During the first process or after the operation is stopped for a predetermined time The dilution liquid is supplied from the dilution liquid supply source to the vicinity of the object to be processed via the liquid supply pump, and the chemical liquid is supplied from the chemical pump set to be linked to the operation of the liquid supply pump in the middle of the supply path. In the processing method in which the second process is performed by injecting and preparing a second diluted chemical in the supply path and discharging the processed liquid toward the object to be processed, the operation of the chemical pump is controlled by turning on the supply pump. -Set of off-signal and on-off signal of transfer pump feed pump By controlling the combined prior to the first treatment step, is actuated only liquid feed pump without operating the liquid chemical pump, accumulated in the reservoir by ejecting only the diluting liquid from the diluting liquid supply source, the A chemical solution supply method in which the first diluted chemical solution is prepared using the dilution liquid in the storage tank is a first gist.
[0018]
In addition, the object to be processed is held above the storage tank whose upper surface is open so that the liquid can pass in the vertical direction, and the first diluted chemical solution stored in the storage tank is transferred to the object to be processed. A first process of transferring to the vicinity of the object to be processed via the pump and discharging toward the object to be processed is performed, and the dilution liquid is supplied from the dilution liquid supply source during the first process or after the operation is stopped for a predetermined time. Is supplied to the vicinity of the object to be processed through the liquid supply pump, and a chemical liquid is injected into the supply path in the middle of the supply path from the chemical liquid pump set to be interlocked with the operation of the liquid supply pump . A chemical supply apparatus used in a processing method in which a second chemical process is performed in which a diluted chemical liquid is prepared and discharged toward an object to be processed, which is processed from a dilution liquid supply source via a liquid supply pump Dilution liquid supply pipe extending to the vicinity of the object and this dilution liquid supply A diluting chemical solution discharge nozzle provided at the tip of the tube, a second diluting chemical solution preparing pipe connected via a chemical pump in the middle of the diluting liquid supply pipe, and a transfer pump from the storage tank. A first diluted chemical liquid transfer pipe extending to the vicinity of the object to be processed, and a diluted chemical liquid discharge nozzle provided at the tip of the first diluted chemical liquid transfer pipe, and the operation of the chemical liquid pump is It is controlled by a combination of the on-off signal and the on-off signal of the transfer pump. When the transfer pump is turned off and the feed pump is turned on within a predetermined time, the transfer pump and the supply pump The chemical solution supply apparatus in which the chemical liquid pump is operated only in two cases when both of the liquid pumps are turned on is a second gist.
[0019]
Further, among the chemical liquid supply devices, in particular, within the operation time of the liquid supply pump in the second process, the operation time of the chemical liquid pump is only during the operation time of the liquid supply pump or a predetermined time from the start of operation. A chemical supply apparatus set so as not to operate is defined as a third gist.
[0020]
Further, among the above chemical supply apparatus, in particular, the chemical supply apparatus, a chemical supply device Ru rinse agent supply device der for automatic dishwashing operations shall be the fourth aspect.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
[0022]
First, according to the present invention, an object to be processed is held above a storage tank whose upper surface is opened in a state in which liquid can pass in the vertical direction, and the first dilution stored in the storage tank is stored for the object to be processed. A liquid supply source for dilution is performed during the first process or after a predetermined time of operation suspension, in which a chemical solution is transferred to the vicinity of the object to be processed via a transfer pump and discharged toward the object to be processed. The liquid for dilution is supplied to the vicinity of the object to be processed through the liquid supply pump, and the supply path is formed by injecting the chemical liquid from the chemical pump set to interlock with the operation of the liquid supply pump in the middle of the supply path. The present invention is directed to a chemical solution supply method and an apparatus used therefor that are employed in a processing method in which a second process is performed in which a second diluted chemical solution is prepared and discharged toward an object to be processed.
[0023]
The above processing methods are not particularly limited, such as various cleaning methods, textile processing methods such as dyeing, metal processing parts processing methods, food processing methods, etc. Among them, an automatic dishwasher for business use is used. It is particularly suitable to apply to a cleaning method.
[0024]
The case where the present invention is applied to a cleaning method using the above-described automatic business dishwasher will be described below as an example.
[0025]
The commercial automatic dishwasher may be of any type, but for example, a door type shown in FIG. 8 can be used. And as the rinse pump 12 used for the said washing | cleaning machine, the thing of the tube pump type shown, for example in FIG. 1 can be used.
[0026]
The rinse pump 12 includes a main body portion 20 and a pump portion 21, and vertically long engagement slits 22 are formed on the back surface of the main body portion 20 at two positions on the left and right. Then, after attaching the mounting bracket 23 as shown in FIG. 1 to an appropriate position using the wall surface in the vicinity of the washing machine, the engagement slit 22 of the rinse pump 12 is formed in the hook 23a of the mounting bracket 23. By engaging, the rinse pump 12 can be detachably attached and held.
[0027]
As shown in FIG. 2, the pump portion 21 of the rinse pump 12 includes a transparent resin housing 24, a pump tube 25 held in a U-shape inside the resin housing 24, and rollers 26 at both ends thereof. And a supported rotating arm 27. A rinsing agent supply pipe 28 extending from the high concentration rinsing agent supply source 11 (see FIG. 8) is connected to one end of the pump tube 25, and the liquid supply pipe 9 is connected to the other end of the pump tube 25. (See FIG. 8) are connected.
[0028]
A rotation drive is applied to the central shaft 27a of the rotary arm 27 from a motor built in the main body portion 20, and rollers 26 supported on both ends of the rotary arm 27 are supported by the rotation operation of the rotary arm 27. Rotating while alternately pressing against the arc portion of the pump tube 25, the high-concentration rinse agent is sucked from the rinse agent supply pipe 28 as indicated by an arrow, and sent to the liquid supply pipe 9 side. . Therefore, according to this rinse pump 12, if a constant operation control is given to the motor in the main body 20 in advance, a high-concentration rinse agent is supplied little by little at a predetermined timing with ease and accuracy. It can be introduced into the liquid pipe 9.
[0029]
The motor control of the rinse pump 12 is set in accordance with, for example, the flowchart shown in FIG. According to this flowchart, (1) the operating power of the transfer pump 7 of the washing machine is turned on and the operating power of the liquid supply pump 10 is turned on, and (2) the operating power of the transfer pump 7 is turned on (10 seconds). In the two modes of switching from the above operation) to off and the operation power supply of the liquid supply pump 10 being turned on within one minute thereafter, the operation power supply of the motor of the rinse pump 12 is turned on and is in a controllable state. It is set to be. In other cases, the motor of the rinse pump 12 does not operate. The state of (1) above is the case where the rinsing process starts during the cleaning process, and particularly corresponds to the rack conveyor type and the flight conveyor type of the automatic dishwasher for business use, and the state of (2) above is In this state, the rinsing process starts after a predetermined time (within 1 minute) from the cleaning process. Accordingly, the rinse pump 12 does not operate during the hot water supply prior to the cleaning process (a state where only the liquid supply pump 10 is operated without operating the transfer pump 7), and the rinse agent is used wastefully. There is nothing.
[0030]
By the way, the operation of the entire commercial automatic dishwasher is automatically controlled according to a flowchart as shown in FIG. 4, and unlike the conventional case (see FIG. 9), the rinse pump 12 is used in the hot water supply process. It can be seen that the rinse agent is injected only by the rinsing process.
[0031]
The rinse pump 12 (returning to FIG. 1) can be opened and closed at its side surface 20a in order to adjust and maintain internal parts of the main body 20, and the side surface 20a can be freely opened and closed. The part to be attached is preferably not a normal hinge structure but a structure using a special hinge 30 as shown in FIG. 5, for example.
[0032]
As shown in FIGS. 6A and 6B, the hinge 30 cuts a 2 mm-thick plastic plate (for example, made of polypropylene) into a predetermined shape, and creases a predetermined portion of the front and back surfaces. For this purpose, V-shaped grooves 31 to 34 are formed, and the side surface portion 20a is attached to the main body casing 20b (see FIG. 5) as follows. That is, first, the portion where the grooves 31 and 32 are formed is valley-folded, and the portion where the grooves 33 and 34 are formed is mountain-folded, and as shown in FIG. Is attached to the inside of the side surface portion 20a by loosely fitting to the stud 36 for mounting the circuit board formed inside the side surface portion 20a. Then, the hole 37a of the rightmost surface 37 on the opposite side is overlapped with the hole 38 formed on the back surface of the main body casing 20b from the inside and screwed to be attached to the inner side of the main body casing 20b. In this manner, the side surface portion 20a can be attached to the main body casing 20b via the hinge 30 so as to be freely opened and closed.
[0033]
The open / close structure using the hinge 30 has the following advantages. That is, in the normal hinge structure, when the side surface portion 20a is opened 90 °, as shown by the chain line in FIG. Since it hits 40 (indicated by diagonal lines), it cannot be opened widely. Moreover, if it is forcibly opened, the wall 40, the side surface 20a, or the engaging hook 23a (see FIG. 1) and the engaging portion of the engaging slit 22 of the main casing 20b may be damaged. On the other hand, in the hinge structure using the hinge 30, as shown by the solid line in FIG. 7, the surfaces 35 and 37 on both sides of the hinge 30 are attached to the side surface portion 20a and the main body casing 20b, respectively. The one side 35 moves freely to some extent, and the projecting portion 39 consisting of three intermediate surfaces is arranged to some extent freely according to the degree of opening of the grooves 31 to 34. Therefore, the side surface portion 20a opened by 90 ° Does not protrude from the wall 40 and does not hit the wall 40. Therefore, there is an advantage that adjustment and maintenance of various electronic components (not shown) mounted on the circuit board 50 loaded inside the side surface portion 20a are very easy.
[0034]
The hinge 30 forms four folds and divides the plastic plate into five surfaces. However, the number of folds is increased from four and the number of divisions of the inner surface protruding freely is increased. When the number is increased, the degree of freedom of the projecting portions formed on these surfaces is increased, so that a compact hinge with a small degree of projecting can be obtained.
[0035]
Further, the resin housing 24 (see FIG. 1) in the pump portion 21 of the rinse pump 12 is preferably transparent so that the internal state can be observed from the outside, and has high strength and excellent chemical resistance. preferable. And from a manufacturing standpoint, it is preferable that molding is easy, and it is preferable that dimensional accuracy is high. Therefore, as the material of the resin housing 24, polyethylene resin, polypropylene resin, polyamide resin, polyacetal resin, polycarbonate resin, polyphenylene ether resin, polybutylene terephthalate resin, ultrahigh molecular weight polyethylene resin, polysulfone resin, polyethersulfone resin, Examples thereof include polyphenylene sulfide resin, polyarate resin, polyamideimide resin, polyetherimide resin, polyetheretherketone resin, polyimide resin, polytetrafluoroethylene resin, and copolyester resin. Among these, those satisfying the above conditions are appropriately selected. Among them, polysulfone resin, polyethersulfone resin, and copolyester resin are preferably used from the viewpoint of strength, chemical resistance, and moldability. It is.
[0036]
Furthermore, the motor operation of the rinse pump 12 may be performed at the same time as the liquid supply pump 10 is turned on, that is, at the same time as the rinsing process is entered. Usually, in order to efficiently apply the rinse agent, By setting the timer, control is performed so that the motor of the rinse pump 12 operates after a certain time lag elapses. For example, the operation time (total rinsing time) of the feed pump 10 is set to 5 to 30 seconds, and the rinse pump 12 does not operate for the first 0 to 13 seconds of the set operation time of the feed pump 10. It is preferable to set so.
[0037]
Next, examples will be described together with comparative examples.
[0038]
【Example】
Tableware was washed under the following conditions using a commercial automatic dishwasher having the same basic structure as that shown in FIG.
[0039]
[Processing conditions]
(1) Hot-water supply process: Repeatedly supplying hot water of 80 ° C. at a rate of 30 liters / minute for 10 seconds through the rinse nozzle 4 until the washing tank is full.
(2) Cleaning step: A cleaning agent is injected into hot water supplied to a cleaning tank 5 having a capacity of 60 liters to prepare a cleaning solution having a dilution concentration of 0.18% by weight and discharged from the cleaning nozzle 3 to 600 liters. Wash for 50 seconds at a rate of / min.
(3) Pause ... Pause for 5 seconds.
(4) Rinsing step: First, 80 ° C. hot water is discharged from the rinsing nozzle 4 at a rate of 30 liters / minute for 10 seconds to perform rinsing. The rinse agent is injected from 5 seconds after the start of rinsing until the end of rinsing (5 seconds). The concentration of the rinse agent was 1 / 10,000 of the amount of rinse water.
▲ 5 ▼ End [0040]
[Comparative example]
In the hot water supply step (1), the rinse agent is injected together with the hot water. Other than that, the dishes were washed under the same conditions as in the above example.
[0041]
In the comparative example, the amount of rinse agent used per month was 3360 cc when the hot water supply process was performed twice a day, and cleaning was performed at 200 racks / day and operating days of 30 days. Then, the amount of rinse agent used per month is 3000 cc, and it can be seen that the amount of use is greatly reduced.
[0042]
【The invention's effect】
As described above, the present invention, the processing by the processing and the second dilution liquor by the first dilution liquor to a treatment performed in phases, diluting liquid for preparing the first dilution liquor (water In the chemical solution supply method in the process using the second dilution liquid supply means as the hot water, etc., by giving specific control to the chemical pump, it is possible to dilute without injecting the chemical solution for the second dilution chemical solution. it is obtained by the so that it is possible to introduce only liquid. Therefore, when the dilution liquid is introduced prior to the treatment with the first diluted chemical liquid, the chemical liquid for the second diluted chemical liquid is not injected and is not wasted, which is economical.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a rinse pump used in an embodiment of the present invention.
FIG. 2 is an operation explanatory diagram of the rinse pump.
FIG. 3 is an explanatory diagram showing a flowchart for controlling the operation of the rinse pump.
FIG. 4 is an explanatory diagram showing a flowchart for operation control of the commercial automatic dishwasher of the embodiment.
FIG. 5 is an exploded perspective view of the rinse pump.
6A is a development view of a hinge used in the rinse pump, and FIG. 6B is a cross-sectional view thereof.
FIG. 7 is an explanatory diagram of an opening / closing operation by the hinge.
FIG. 8 is an explanatory diagram of a configuration of a conventional automatic business dishwasher.
FIG. 9 is an explanatory diagram showing a flowchart of operation control of the conventional business automatic dishwasher.

Claims (4)

An object to be processed is held above the storage tank whose upper surface is open in a state where the liquid can pass in the vertical direction, and the first diluent liquid stored in the storage tank is transferred to the object to be processed by a transfer pump. The first liquid is transferred to the vicinity of the object to be processed and discharged toward the object to be processed, and the dilution liquid is supplied from the dilution liquid supply source during the first process or after the operation is stopped for a predetermined time . Supply to the vicinity of the object to be processed through the liquid supply pump, and in the middle of the supply path, a chemical liquid is injected from a chemical pump set to be interlocked with the operation of the liquid supply pump , and the second dilution is performed in the supply path In the processing method of preparing the chemical liquid and performing the second process of discharging toward the object to be processed, the operation of the chemical liquid pump is performed by turning on / off the feed pump and turning on the feed pump of the transfer pump. -By controlling by a combination of off signals, Prior to the serial first process step, it is actuated only liquid feed pump without operating the liquid chemical pump, accumulated in the reservoir by ejecting only the diluting liquid from the diluting liquid supply source, the dilution liquid in the storage tank A chemical solution supply method, characterized in that the first diluted chemical solution is prepared by use. An object to be processed is held above the storage tank whose upper surface is open in a state where the liquid can pass in the vertical direction, and the first diluent liquid stored in the storage tank is transferred to the object to be processed by a transfer pump. The first liquid is transferred to the vicinity of the object to be processed and discharged toward the object to be processed, and the dilution liquid is supplied from the dilution liquid supply source during the first process or after the operation is stopped for a predetermined time . Supply to the vicinity of the object to be processed through the liquid supply pump, and in the middle of the supply path, a chemical liquid is injected from a chemical pump set to be interlocked with the operation of the liquid supply pump , and the second dilution is performed in the supply path A chemical supply apparatus for use in a processing method for preparing a chemical liquid and performing a second process for discharging the liquid toward the object to be processed, in the vicinity of the object to be processed from a dilution liquid supply source via a liquid supply pump And the dilution liquid supply pipe extending to A dilute chemical solution discharge nozzle provided at the end, a second dilute chemical solution preparation pipe connected via a chemical pump in the middle of the dilution liquid supply pipe, and a transfer pump from the storage tank via the transfer pump A first dilute chemical liquid transfer pipe extending to the vicinity of the object to be processed; and a dilute chemical liquid discharge nozzle provided at the tip of the first dilute chemical liquid transfer pipe. It is controlled by the combination of the off signal and the on / off signal of the transfer pump. When the transfer pump is turned off and the feed pump is turned on within a predetermined time, the transfer pump and the feed pump The chemical liquid supply device is characterized in that the chemical liquid pump operates only in two cases when both are turned on. The operation time of the chemical liquid pump is set so as not to operate for a predetermined time during the operation time of the liquid supply pump or from the start of operation within the operation time of the liquid supply pump in the second process. Chemical supply device. The chemical supply device, the chemical liquid supply apparatus according to claim 2 or 3, wherein Ru rinse agent supply device der for automatic dishwashing operations.

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