Washing device

Abstract

To provide washing equipment capable of accurately washing a body to be washed by using a room-temperature aqueous solution in which hydrogen peroxide serves as a solute.SOLUTION: Washing equipment 1 includes: a body-to-be-washed installation part 5 in which a body 3 to be washed is installed; and an aqueous solution discharge part 7 for discharging a room-temperature aqueous solution 9, in which a given amount of hydrogen peroxide and a given amount of pH adjuster for adjusting alkalinity serve as solutes, toward the body 3 to be washed, which is installed in the body-to-be-washed installation part 5.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to Washing device .

Background Art

[0002] Conventionally, a cleaning device for cleaning an object to be cleaned such as a food tray using a cleaning liquid at a high temperature of about 80°C is known. By using a high-temperature cleaning liquid heated by a boiler or the like, the dirt adhering to the object to be cleaned can be firmly removed.

[0003] However, a large amount of fuel is consumed to raise the temperature of the cleaning liquid. This is not preferable for environmental issues (for example, the declaration of carbon neutrality in 2050).

[0004] Also, the temperature suitable for human labor is 23°C to 25°C. However, when using a high-temperature cleaning liquid, the temperature of the room where humans work will rise to an inappropriate temperature for the workers. Therefore, it is necessary to appropriately exhaust the air with accumulated heat in the room through a duct or the like. Furthermore, when the temperature of the cleaning liquid rises, there is a risk that the components of the cleaning agent dissolved in the cleaning liquid will escape due to decomposition or the like.

[0005] Note that there is also known a cleaning agent for an automatic dishwashing machine that exhibits excellent detergency against oil stains and protein stains even at low temperatures (see Patent Document 1).

[0006] The cleaning agent for an automatic dishwashing machine described in Patent Document 1 uses polyoxypropylene having an average degree of polymerization of 30 to 90 of oxypropylene groups as a cleaning base, and further contains an alkaline protease having specific physicochemical properties.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

[0008] Here, an aqueous solution containing hydrogen peroxide as a solute can be considered as a safe, inexpensive, and easily obtainable cleaning solution. If the cleaning solution is used at room temperature, the decomposition of hydrogen peroxide will be suppressed.

[0009] This invention allows for the precise cleaning of an object to be cleaned using a room-temperature aqueous solution containing hydrogen peroxide as the solute. Washing device The purpose is to provide. [Means for solving the problem]

[0011] The invention described in claim 1 comprises a part for installing an object to be installed, and an aqueous solution discharge unit that discharges an aqueous solution at room temperature, in which only a predetermined amount of hydrogen peroxide and a predetermined amount of pH adjusting agent for adjusting the degree of alkalinity are used as solutes, toward the object to be installed in the part for installing an object to be installed. A pH adjusting agent concentration detection sensor for detecting the concentration of the pH adjusting agent in the aqueous solution, and a concentration adjustment unit that adjusts the concentration of the pH adjusting agent and the concentration of hydrogen peroxide in the aqueous solution according to the detection result of the pH adjusting agent concentration detection sensor, without directly detecting the concentration of hydrogen peroxide in the solution. It is a cleaning device that has [a certain feature].

[0012] The invention described in claim 2 has an aqueous solution storage section for storing the aqueous solution, and the aqueous solution dispensing section dispenses the aqueous solution stored in the aqueous solution storage section. Using a pump The aqueous solution is discharged toward the object to be cleaned, which is installed in the object to be cleaned installation section, and the aqueous solution discharged toward the object to be cleaned, which is installed in the object to be cleaned installation section, is configured to return to the aqueous solution storage section. Furthermore, the system is configured to maintain the aqueous solution at a temperature within the range of 30°C to 40°C, which is suitable for cleaning the object to be cleaned, by stirring the aqueous solution through the operation of the pump. The cleaning device is as described in claim 1.

[0014] Claim 3The invention described herein is a cleaning device according to claim 1, wherein the cleaning unit, which comprises the object to be cleaned installation unit and the aqueous solution discharge unit, is configured to include a pump and an aqueous solution storage unit for storing the aqueous solution, and when the pump of the cleaning unit is operated, the aqueous solution supplied from the aqueous solution storage unit is discharged from the aqueous solution discharge unit, and the device has a rinsing unit that rinses the object to be cleaned by discharging water toward the object to be cleaned by the aqueous solution discharge unit, the rinsing unit being separate from the cleaning unit, the rinsing unit comprising a water storage unit and a pump, and when the pump of the rinsing unit is operated, the water stored in the water storage unit is discharged toward the object to be cleaned by the aqueous solution, and the water used in the rinsing unit enters the water storage unit and is also supplied to the aqueous solution storage unit.

[0015] Claim 4 The invention described above has a temperature sensor for detecting the temperature of the aqueous solution, and is configured to change the time for discharging the aqueous solution toward the object to be cleaned according to the detection result of the temperature sensor. Claim 3 It is a cleaning device as described in any one of the items.

[0016] Claim 5 The invention described herein includes a memory that stores data on the decrease in the concentration of the pH adjusting agent relative to a predetermined decrease in the concentration of the hydrogen peroxide when the aqueous solution is used to clean the object to be cleaned and the concentrations of the hydrogen peroxide and pH adjusting agent in the aqueous solution decrease, and the concentration adjustment unit is configured to adjust the concentration of the pH adjusting agent and the concentration of the hydrogen peroxide based on the data stored in the memory and the detection result from the pH adjusting agent concentration detection sensor. Any one of claims 1 to 4 This is the cleaning device described. [Effects of the Invention]

[0017] According to the present invention, the object to be cleaned can be effectively cleaned using an aqueous solution of hydrogen peroxide as the solute at room temperature.

Brief Description of the Drawings

[0018] [Figure 1] This is a diagram showing a cleaning device according to an embodiment of the present invention.

Modes for Carrying Out the Invention

[0019] As shown in FIG. 1, the cleaning device 1 according to an embodiment of the present invention is a device for cleaning an object to be cleaned 3 such as a food tray, and includes a cleaning unit 2 and a rinsing unit 17. The cleaning unit 2 is configured to include a placement unit for the object to be cleaned (a placement unit for the object to be cleaned) 5 and an aqueous solution discharge unit (an aqueous solution injection unit) 7.

[0020] The object to be cleaned 3 is placed on the placement unit for the object to be cleaned 5. Protein, oil, etc. are attached to the object to be cleaned 3 before it is placed on the placement unit for the object to be cleaned 5.

[0021] The aqueous solution discharge unit 7 discharges (injects) a room-temperature aqueous solution 9, which is a cleaning liquid, toward the object to be cleaned 3 placed on the placement unit for the object to be cleaned 5 in order to clean the object to be cleaned 3. The aqueous solution 9 has a predetermined amount of hydrogen peroxide and a predetermined amount of a pH adjuster for adjusting the degree of alkalinity as solutes. That is, the aqueous solution 9 is produced from water, a predetermined amount of hydrogen peroxide, and a predetermined amount of a pH adjuster.

[0022] The pH adjuster makes the aqueous solution 9 alkaline, and at least one of, for example, sodium hydroxide, potassium hydroxide, sodium carbonate, etc. is used as the pH adjuster.

[0023] The concentration of hydrogen peroxide in the aqueous solution 9 is in the range of 1 wt% to 2 wt%, but the above range may be appropriately widened. For example, it may be widened to 1 wt% to 3 wt%, or it may be widened to 0.5 wt% to 5 wt%.

[0024] Furthermore, the amount of pH adjusting agent in aqueous solution 9 is such that the pH value of aqueous solution 9 is greater than 8 (within the range of 8 to 14). More preferably, the amount of pH adjusting agent in aqueous solution 9 is such that the pH value of aqueous solution 9 is around 11 (for example, 10 to 12).

[0025] Room temperature in aqueous solution 9 refers to the temperature at which aqueous solution 9 is in a liquid state, where saponification between the pH adjuster and the oil is unlikely to occur, and foam is unlikely to be generated from aqueous solution 9. For example, room temperature can be defined as a temperature within the range of 0°C to 50°C. Alternatively, room temperature may be defined as a temperature within the range of 10°C to 45°C, 20°C to 40°C, 30°C to 40°C, or 35°C to 40°C. Although temperatures between 35°C and 50°C are generally considered to be slightly higher than room temperature, they will be included in room temperature here.

[0026] Furthermore, the washing device 1 is equipped with an aqueous solution storage unit 11, a pH adjusting agent concentration detection sensor 13, and a concentration adjustment unit 15. The aqueous solution storage unit 11 is designed to store the aqueous solution 9.

[0027] The aqueous solution discharge unit 7 is configured to discharge the aqueous solution 9 stored in the aqueous solution storage unit 11 toward the object to be cleaned 3 which is installed in the object to be cleaned installation unit 5.

[0028] The aqueous solution 9 discharged towards the object to be cleaned 3, which is installed in the object to be cleaned installation section 5, is configured to return to the aqueous solution storage section 11. The aqueous solution 9 is replaced at predetermined intervals, such as every day (for example, each time the cleaning device 1 operates and cleans the object to be cleaned 3 for a predetermined period of time).

[0029] The pH adjuster concentration detection sensor 13 is designed to detect the concentration of the pH adjuster in the aqueous solution 9. More specifically, the pH adjuster concentration detection sensor 13 detects the concentration of the pH adjuster in the aqueous solution 9 by detecting the electrical conductivity of the aqueous solution 9.

[0030] The concentration adjustment unit 15 adjusts the concentration of the pH adjusting agent and the concentration of hydrogen peroxide in the aqueous solution 9 according to the detection result from the pH adjusting agent concentration detection sensor 13. In other words, it adjusts the concentration of hydrogen peroxide according to the concentration of the pH adjusting agent detected by the pH adjusting agent concentration detection sensor 13, without directly detecting the concentration of hydrogen peroxide.

[0031] To explain further, the concentration adjustment unit 15 adjusts the concentration of the pH adjusting agent and the concentration of hydrogen peroxide in the aqueous solution 9 by appropriately supplying a predetermined amount of pH adjusting agent and a predetermined amount of hydrogen peroxide to the aqueous solution 9. The adjustment of the concentrations of the pH adjusting agent and hydrogen peroxide by the concentration adjustment unit 15 is done in order to properly remove proteins and oils adhering to the object to be cleaned 3 when cleaning the object to be cleaned 3.

[0032] Furthermore, in the rinsing section 17 of the cleaning device 1, water 19 is discharged (squirted) by the aqueous solution discharge section 7 towards the object to be cleaned 3, which has been cleaned with the aqueous solution 9, to rinse the object to be cleaned 3.

[0033] The water used to rinse the object to be cleaned 3 in the rinsing section 17 is supplied to the aqueous solution 9 and used in the aqueous solution discharge section 7 after it has been used for a certain period of time and is no longer used for rinsing in the rinsing section 17. The object to be cleaned 3 that has been rinsed in the rinsing section 17 is dewatered in a dewatering section (not shown) (for example, a dewatering device using centrifugal force).

[0034] Let's explain the cleaning device 1 in more detail.

[0035] The cleaning unit 2 of the cleaning device 1 is provided with a cleaning chamber 21. The section 5 for placing the object to be cleaned is located inside the cleaning chamber 21. A pipe 23 extends from the aqueous solution storage unit 11 to the cleaning chamber 21. A pump 26 is installed in the middle of the pipe 23. When the pump 26 is in operation, the aqueous solution 9 is supplied from the aqueous solution storage unit 11 into the cleaning chamber 21.

[0036] The aqueous solution 9 is discharged from the piping 23 towards the object to be cleaned 3 within the cleaning chamber 21. Even without the need for a separate temperature control unit such as a heater, the temperature of the aqueous solution settles to 30°C to 40°C due to stirring of the aqueous solution 9 by the pump 26.

[0037] The concentration adjustment unit 15 is equipped with a hydrogen peroxide supply unit 25 and a pH adjusting agent supply unit (not shown). The hydrogen peroxide supply unit 25 supplies a concentrated hydrogen peroxide solution to the aqueous solution 9 in the aqueous solution storage unit 11. The pH adjusting agent supply unit supplies a pH adjusting agent (for example, sodium hydroxide) to the aqueous solution 9 in the aqueous solution storage unit 11.

[0038] Alternatively, instead of supplying hydrogen peroxide to the aqueous solution 9 in the aqueous solution storage unit 11, hydrogen peroxide may be supplied into the piping 23 midway through the piping 23 (see dashed arrows A1 and A2).

[0039] The rinsing section 17, like the washing section 2, is configured with a section for the object to be washed 27, a water storage section 29, a rinsing chamber 31, piping 33, and a pump 35. And, similar to the washing section 2, when the pump 35 is operated, water 19 is discharged toward the object to be washed 3 installed in the section for the object to be washed 27. Furthermore, as described above, the water 19 in the water storage section 29 is supplied to the aqueous solution storage section 11 as needed.

[0040] The transfer of the object to be cleaned 3 from the washing section 2 to the rinsing section 17, and from the rinsing section 17 to the dewatering section (not shown), is, for example, carried out by a conveyor (not shown), but the washing, rinsing, and dewatering of the object to be cleaned 3 may also be carried out in a batch system.

[0041] Now, let's explain the cleaning section 2 further. Partway through pipe 23, pipe (branch pipe) 23A branches off. The aqueous solution 9 that flows through pipe 23A is not used for cleaning in cleaning section 2, but returns directly to the aqueous solution storage section 11.

[0042] A flow control valve 36A is provided in the middle of piping 23, and a flow control valve 36B is provided in the middle of piping 23A. Flow control valve 36A is located downstream of the point where piping 23A branches (downstream in the direction of flow of the aqueous solution 9). Flow control valve 36A adjusts the amount of aqueous solution 9 discharged from the cleaning unit 2 toward the object to be cleaned 3. Flow control valve 36B adjusts the amount of aqueous solution 9 that returns directly to the aqueous solution storage unit 11.

[0043] As the pump 26, for example, a constant-discharge pump is used. By closing the flow rate adjustment valve 36B and opening the flow rate adjustment valve 36A, all of the aqueous solution 9 discharged from the pump 26 is used in the cleaning unit 2. Also, by opening the flow rate adjustment valve 36B and closing the flow rate adjustment valve 36A, all of the aqueous solution 9 discharged from the pump 26 is returned directly to the aqueous solution storage unit 11.

[0044] Furthermore, by appropriately adjusting the opening of the flow rate adjustment valves 36A and 36B, the ratio of the aqueous solution 9 discharged from the pump 26 and used in the cleaning section 2 to the aqueous solution 9 discharged from the pump 26 and returned directly to the aqueous solution storage section 11 can be appropriately changed.

[0045] With this configuration, even if the aqueous solution 9 discharged from the pump 26 is not used in the cleaning unit 2, as long as the pump 26 is running, the aqueous solution 9 can be kept at a temperature suitable for cleaning the object to be cleaned 3 (for example, 30°C to 40°C).

[0046] Next, let's explain the rinsing section 17 further. Partway through the pipe 33, a pipe (branch pipe) 33A branches off. The water 19 that flows through pipe 33A is not used for rinsing in the rinsing section 17, but returns directly to the water storage section 29.

[0047] A flow control valve 37A is provided in the middle of piping 33, and a flow control valve 37B is provided in the middle of piping 33A. Flow control valve 37A is provided downstream of the point where piping 33A branches (downstream in the direction of water flow 19). Flow control valve 37A adjusts the amount of water 19 discharged towards the object to be cleaned 3 in the rinsing section 17. Flow control valve 37B adjusts the amount of water 19 that returns directly to the water storage section 29.

[0048] For example, a pump 35 with a constant discharge rate is used. By closing the flow control valve 37B and opening the flow control valve 37A, all of the water 19 discharged from the pump 35 is used in the rinsing section 17. Conversely, by opening the flow control valve 37B and closing the flow control valve 37A, all of the water 19 discharged from the pump 35 is returned directly to the water storage section 29.

[0049] Furthermore, by appropriately adjusting the opening of the flow control valves 37A and 37B, the ratio of the water 19 discharged from the pump 35 and used in the rinsing section 17 to the water 19 discharged from the pump 35 and returned directly to the water storage section 29 may be appropriately changed.

[0050] With this configuration, even if the water 19 discharged from the pump 35 is not used in the rinsing section 17, as long as the pump 35 is running, the water 19 can be kept at a temperature suitable for rinsing the object to be cleaned 3 (for example, 30°C to 40°C).

[0051] Next, we will further explain the flow (movement) of the water 19 used in the rinsing section 17. Pipes 39A, 39B, and 39C extend from the rinsing chamber 31. Water 19 flows through pipes 39A, 39B, and 39C.

[0052] Pipe 39A connects the bottom of the rinsing chamber 31 to the aqueous solution storage section 11. Pipe 39B connects the bottom of the rinsing chamber 31 to the water storage section 29. Pipe 39C connects the bottom of the rinsing chamber 31 to a drain outlet for water 19 (not shown).

[0053] A flow control valve 37C is provided in the middle of piping 39A. A flow control valve 37D is provided in the middle of piping 39B. A flow control valve 37E is provided in the middle of piping 39C. By adjusting the opening of flow control valves 37C, 37D, and 37E, the amount of water 19 used in the rinsing section 17 supplied from the rinsing chamber 31 to the aqueous solution storage section 11 and the water storage section 29 can be adjusted as appropriate. In addition, by adjusting the opening of flow control valves 37C, 37D, and 37E, the amount of water 19 used in the rinsing section 17 that is discarded from the rinsing chamber 31 to the drain can be adjusted as appropriate.

[0054] The water 19 used in the rinsing section 17 is supplied to the aqueous solution storage section 11 and the water storage section 29 by gravity, and is also discarded through the drain. A pump (not shown) may be provided to forcibly supply and discard the water 19 (for example, a constant-discharge pump).

[0055] Furthermore, under normal conditions, most of the water 19 used in the rinsing section 17 is supplied to the aqueous solution storage section 11 and used as aqueous solution 9. As a result, the amount of aqueous solution 9 in the aqueous solution storage section 11 increases, but if the amount of aqueous solution 9 becomes too large, the aqueous solution 9 overflows from the aqueous solution storage section 11, and this overflowed aqueous solution 9 is discarded.

[0056] A sensor (not shown) may be provided in the water storage section 29. This sensor (for example, a level sensor) is configured to measure the amount of water 19 in the water storage section 29. If the amount of water 19 in the water storage section 29 falls below a predetermined amount, water 19 may be supplied to the water storage section 29 from a water supply unit (not shown).

[0057] Furthermore, the cleaning device 1 is equipped with a control unit 41, which for example comprises a CPU 43 and a memory 45, and the cleaning device operates under the control of the control unit 41.

[0058] Next, the operation of the cleaning device 1 will be explained. First, the object to be cleaned 3 is placed in the object to be cleaned placement section 5 of the cleaning unit 2. Subsequently, the aqueous solution 9 is discharged toward the object to be cleaned 3 for a predetermined time to clean the object to be cleaned 3.

[0059] For a while after starting operation, the temperature of the aqueous solution 9 will be low, around 10°C to 25°C, but the cleaning of the object to be cleaned 3 may be performed at this low temperature. Alternatively, a temperature sensor may be provided to detect the temperature of the aqueous solution 9, and the time for discharging the aqueous solution 9 toward the object to be cleaned 3 may be appropriately changed according to the detection result of this temperature sensor. For example, when the temperature of the aqueous solution 9 is low, the time for discharging the aqueous solution 9 toward the object to be cleaned 3 may be increased, and as the temperature of the aqueous solution 9 increases, the time for discharging the aqueous solution 9 toward the object to be cleaned 3 may be gradually decreased.

[0060] The object to be cleaned 3, which has been cleaned in the washing section 2, is placed in the object to be cleaned placement section 27 of the rinsing section 17. Next, water 19 is discharged towards the object to be cleaned 3 for a predetermined time to rinse the object to be cleaned 3. The object to be cleaned 3, which has been rinsed in the rinsing section 17, is dewatered in a dewatering section (not shown).

[0061] The cleaning device 1 is configured to discharge a room-temperature aqueous solution 9, in which a predetermined amount of hydrogen peroxide and a predetermined amount of pH adjusting agent to adjust the degree of alkalinity are used as solutes, toward the object to be cleaned 3 which is installed in the object to be cleaned installation section 5.

[0062] This allows the object to be cleaned 3 to be accurately cleaned using a room-temperature aqueous solution 9 with hydrogen peroxide as the solute.

[0063] Furthermore, since there is no need to raise the temperature of the aqueous solution 9, no fuel is consumed for heating, resulting in energy savings and being environmentally friendly.

[0064] Furthermore, since a room-temperature aqueous solution 9 is used, it prevents the temperature of the room where people work from rising to a level unsuitable for work. This improves the working environment of the room.

[0065] By keeping the temperature of aqueous solution 9 at room temperature, saponification by the paper conditioning agent and oils is almost completely eliminated, preventing the aqueous solution 9 from foaming. Furthermore, because hydrogen peroxide is used as the solute, even when the aqueous solution 9 is sprayed towards the object to be cleaned 3, almost no foam is generated. This allows the scraping power (the ability to scrape off dirt adhering to the object to be cleaned 3) of the sprayed aqueous solution 9 to be maintained.

[0066] Furthermore, since hydrogen peroxide is used as the solute, unpleasant odors are almost never generated during drying of the object to be cleaned 3, unlike when using chlorine-based cleaning solutions.

[0067] Here, we will explain the general cleaning action of a room-temperature aqueous solution 9 containing a predetermined amount of hydrogen peroxide and a predetermined amount of pH adjuster to adjust the degree of alkalinity as solutes.

[0068] Hydrogen peroxide is a weak acid in aqueous solution, and in alkaline aqueous solutions, it is a hydrogen ion (H + ) and perhydroxyanion (HO2 - It dissociates into (undissociated hydrogen peroxide). At pH 9, the proportion of undissociated hydrogen peroxide is over 99%. As the pH value increases, the degree of dissociation of hydrogen peroxide increases, and at pH 11.6, the proportion of undissociated hydrogen peroxide is 50%. At pH 13 and above, the proportion of undissociated hydrogen peroxide is 4% or less.

[0069] Conversely, perhydroxyanion (HO2 -The proportion of hydrogen peroxide increases as the pH value increases. The cleaning power of hydrogen peroxide (cleaning power against dirt attached to the object being cleaned) is due to hydroxide ions (OH) - This is based on the cleaning power of ) and is due to the protein-degrading action of perhydroxyanions produced by the dissociation of hydrogen peroxide.

[0070] The cleaning device 1 is equipped with an aqueous solution storage unit 11 for temporarily storing the aqueous solution 9. The device is designed to be used in a manner in which the aqueous solution 9 is circulated. This allows the aqueous solution 9 to be used without waste.

[0071] Furthermore, the aqueous solution discharge unit 7 discharges the aqueous solution 9 using the pump 26, and the formation of the flow of the aqueous solution 9 by the pump 26 brings the temperature of the aqueous solution 9 to approximately 30°C to 40°C, which is suitable for cleaning. By using the aqueous solution 9 in a circulating manner, it becomes easier to maintain a temperature of 35°C to 40°C with minimal heat waste.

[0072] In the cleaning device 1, the concentration adjustment unit 15 is configured to adjust the concentration of the pH adjusting agent in the aqueous solution 9 and the concentration of hydrogen peroxide in the aqueous solution 9 according to the detection result of the pH adjusting agent concentration detection sensor 13.

[0073] The pH adjuster concentration detection sensor 13 detects the concentration of the pH adjuster in the aqueous solution 9 by detecting the electrical conductivity of the aqueous solution 9. On the other hand, detecting the concentration of hydrogen peroxide in the aqueous solution 9 is more difficult than detecting the concentration of the pH adjuster in the aqueous solution 9.

[0074] When aqueous solution 9 is used for washing, the concentrations of hydrogen peroxide and pH adjuster in aqueous solution 9 decrease, but for example, the rate at which the concentration of hydrogen peroxide decreases and the rate at which the concentration of the pH adjuster decreases remain almost constant.

[0075] Therefore, only the concentration of the pH adjuster, which is easy to detect, is detected, and the concentration of hydrogen peroxide is estimated based on this detection result. By adjusting the concentrations of the pH adjuster and hydrogen peroxide based on these, the concentrations of the pH adjuster and hydrogen peroxide in aqueous solution 9 can be adjusted inexpensively and easily.

[0076] Furthermore, if the concentration of hydrogen peroxide and pH adjuster in aqueous solution 9 decreases when it is used for cleaning, and the rate at which the concentration of hydrogen peroxide decreases and the rate at which the concentration of pH adjuster decreases are not constant, the following procedure should be followed: The rate at which the concentration of pH adjuster decreases relative to the rate at which the concentration of hydrogen peroxide decreases should be determined in advance. This determined data should be stored in memory 45. Then, the concentrations of pH adjuster and hydrogen peroxide should be automatically adjusted based on the data stored in memory 45 and the detection results from the pH adjuster concentration detection sensor 13. Alternatively, instead of storing the data in memory 45, a correspondence table may be created using the data, and a person may adjust the concentrations of pH adjuster and hydrogen peroxide using this correspondence table.

[0077] Furthermore, the cleaning device 1 is configured such that the water 19 used for rinsing in the rinsing section 17 is supplied to the aqueous solution 9 for use. This minimizes the waste of water 19 while cleaning the object to be cleaned 3.

[0078] By the way, you can understand the above as a cleaning method.

[0079] In other words, this can be understood as a cleaning method comprising an aqueous solution production step, in which an aqueous solution is produced by adding a predetermined amount of pH adjusting agent and a predetermined amount of hydrogen peroxide to room temperature water (such as tap water from which impurities have been almost completely removed), and an aqueous solution discharge step, in which the room temperature aqueous solution produced in the aqueous solution production step, in which the predetermined amount of pH adjusting agent and the predetermined amount of hydrogen peroxide are used as solutes, is discharged toward the object to be cleaned.

[0080] In this cleaning method, an aqueous solution storage section is provided for temporarily storing an aqueous solution, and the aqueous solution discharge step is a step of discharging the aqueous solution stored in the aqueous solution storage section toward the object to be cleaned which is installed in the object to be cleaned installation section, and the aqueous solution discharged toward the object to be cleaned may be returned to the aqueous solution storage section.

[0081] Furthermore, the above-described cleaning method may include a pH adjusting agent concentration detection step in which the concentration of the pH adjusting agent in the aqueous solution is detected using a pH adjusting agent concentration detection sensor, and a concentration adjustment step in which the concentration of the pH adjusting agent in the aqueous solution and the concentration of hydrogen peroxide in the aqueous solution are adjusted according to the detection result in the pH adjusting agent concentration detection step.

[0082] Although this embodiment has been described above, this embodiment is not limited to these, and various modifications are possible within the scope of the gist of this embodiment. [Explanation of Symbols]

[0083] 1. Washing device 3. Object to be cleaned 5 Cleaned object installation section 7 Aqueous solution discharge part 9 Aqueous solution 11. Aqueous solution storage section 13. pH Adjuster Concentration Detection Sensor (pH Detection Sensor) 15 Density adjustment section 17. Rinsing section

Claims

1. A section for installing an object to be cleaned, where the object to be cleaned is installed, An aqueous solution discharge unit that discharges a room-temperature aqueous solution containing only a predetermined amount of hydrogen peroxide and a predetermined amount of pH adjusting agent to adjust the degree of alkalinity toward the object to be cleaned, which is installed in the object to be cleaned installation unit, A pH adjusting agent concentration detection sensor for detecting the concentration of the pH adjusting agent in the aqueous solution, A concentration adjustment unit adjusts the concentration of the pH adjuster in the aqueous solution and the concentration of hydrogen peroxide in the aqueous solution according to the detection result of the pH adjuster concentration detection sensor, without directly detecting the concentration of hydrogen peroxide in the solution. A cleaning device having the following features.

2. It has an aqueous solution storage section for storing the aforementioned aqueous solution, The cleaning apparatus according to claim 1, wherein the aqueous solution discharge unit is configured to discharge the aqueous solution stored in the aqueous solution storage unit towards the object to be cleaned installed in the object to be cleaned installation unit using a pump, and the aqueous solution discharged towards the object to be cleaned installed in the object to be cleaned installation unit returns to the aqueous solution storage unit, and the cleaning apparatus is configured to maintain the aqueous solution at a temperature within the range of 30°C to 40°C, which is suitable for cleaning the object to be cleaned, by stirring the aqueous solution by operating the pump.

3. The cleaning unit, comprising the object to be cleaned installation section and the aqueous solution discharge section, is configured to include a pump and an aqueous solution storage section for storing the aqueous solution, and is configured such that when the pump of the cleaning unit is operated, the aqueous solution supplied from the aqueous solution storage section is discharged from the aqueous solution discharge section. The system includes a rinsing section which discharges water towards the object to be cleaned, which has been cleaned with the aqueous solution by the aqueous solution discharge section, to rinse the object to be cleaned, The rinsing section is separate from the washing section, and the rinsing section is configured to include a water reservoir and a pump, and when the pump of the rinsing section is operated, the water stored in the water reservoir is discharged toward the object to be washed with the aqueous solution. The washing apparatus according to claim 1, configured such that the water used in the rinsing section enters the water storage section and is also supplied to the aqueous solution storage section.

4. The cleaning device according to any one of claims 1 to 3, further comprising a temperature sensor for detecting the temperature of the aqueous solution, and configured to change the time for discharging the aqueous solution toward the object to be cleaned according to the detection result of the temperature sensor.

5. The system includes a memory that stores data on the decrease in the concentration of the pH adjusting agent relative to the decrease in the concentration of the hydrogen peroxide, which is determined in advance, when the aqueous solution is used to clean the object to be cleaned and the concentrations of the hydrogen peroxide and the pH adjusting agent in the aqueous solution decrease. The cleaning apparatus according to any one of claims 1 to 4, wherein the concentration adjustment unit is configured to adjust the concentration of the pH adjusting agent and the concentration of hydrogen peroxide based on the data stored in the memory and the detection result of the pH adjusting agent concentration detection sensor.

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