JP6226316B2 - Cleanliness measuring device - Google Patents

Description

  The present invention relates to a cleaning degree inspection apparatus and a cleaning degree inspection method for an object to be cleaned.

  DESCRIPTION OF RELATED ART Conventionally, the washing | cleaning apparatus which wash | cleans cleaning objects, such as glass and a plastics with a washing | cleaning liquid as described in patent document 1, for example is widely used in the field | areas, such as a medical treatment. The inspection of whether the degree of cleaning of the object to be cleaned by such a cleaning apparatus is sufficient is generally performed visually by a cleaning person.

JP 2011-510 A

  However, the visual inspection of the cleaning person may not be able to accurately inspect the cleaning degree of the object to be cleaned.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a cleaning degree inspection apparatus and a cleaning degree inspection method capable of accurately inspecting the degree of cleaning of an object to be cleaned.

(1) A cleaning degree inspection apparatus according to the present invention is a cleaning degree inspection apparatus for inspecting the degree of cleaning of an object to be cleaned with a cleaning liquid. This cleaning degree inspection apparatus includes a first measuring unit that measures the conductivity of a cleaning liquid that is not used for cleaning a cleaning target, and a second measuring unit that measures the conductivity of a cleaning liquid used for cleaning the cleaning target. And a cleanliness inspection unit that inspects the cleanliness of the object to be cleaned using the electrical conductivity measured by the first measurement unit and the electrical conductivity measured by the second measurement unit.

  According to the above configuration, the degree of cleaning of the cleaning object is inspected using the conductivity of the cleaning liquid used for cleaning the cleaning object. Here, as the cleaning of the cleaning object progresses, the amount of components dissolved in the cleaning liquid used for the cleaning decreases, so that the lower the conductivity of the cleaning liquid, the higher the cleaning degree of the cleaning object. Become. For this reason, the conductivity of the cleaning liquid used for cleaning the cleaning object is measured, and the cleaning degree of the cleaning object is inspected, so that the cleaning degree of the cleaning object is inspected without the visual inspection of the cleaning person. can do.

  Furthermore, since the conductivity of the cleaning liquid that is not used for cleaning the cleaning object is also used for the inspection of the cleaning degree of the cleaning object, the conductivity caused by the components contained in the cleaning liquid before the cleaning is determined. Can be used to inspect the degree of cleaning. For example, by comparing the conductivity of the cleaning liquid not used for cleaning the cleaning object with the conductivity of the cleaning liquid used for cleaning the cleaning object, the cleaning object was dissolved in the cleaning liquid by cleaning. The conductivity due to the component can be acquired and used for cleaning degree inspection. For this reason, for example, a cleaning liquid whose conductivity is not constant due to a component dissolved before cleaning (hereinafter referred to as “noise component”) depending on land or place such as city water (tap water) is used. Even if there is, the degree of cleaning of the object to be cleaned can be inspected with high accuracy.

(2) The cleaning liquid continuously flows into the object to be cleaned for a predetermined time, and the cleaning degree inspection apparatus has a part of the cleaning liquid before flowing into the object to be cleaned branched from the cleaning liquid before inflow. The first inflow pipe may be further provided with a second inflow pipe into which the cleaning liquid used for cleaning the cleaning object is supplied. The first measurement unit may continuously measure the conductivity of the cleaning liquid that has flowed into the first inflow pipe. The second measurement unit may continuously measure the conductivity of the cleaning liquid that has flowed into the second inflow pipe. The cleanliness inspection unit acquires the conductivity measured by the first measurement unit and the conductivity measured by the second measurement unit at a predetermined sampling period, and continuously acquired from the first measurement unit. The degree of cleaning of the object to be cleaned may be inspected using the plurality of conductivity values and the predetermined plurality of conductivity values obtained from the second measurement unit in succession.

  According to the above configuration, in order to inspect the degree of cleaning of an object to be cleaned using a predetermined plurality of conductivity obtained successively, partial concentration deviation of components dissolved in the cleaning liquid, flow rate, etc. The degree of cleaning can be inspected by smoothing the effect on the conductivity. For this reason, it is possible to inspect the cleaning degree of the object to be cleaned with higher accuracy.

(3) The cleaning degree inspection unit calculates an average value of the sum of squares of a plurality of predetermined conductivity values continuously acquired from the first measurement unit as the first average value, and continuously performs the second measurement. The average value of the sum of squares of a plurality of predetermined electrical conductivities obtained from the section is calculated as the second average value, and the cleaning degree of the object to be cleaned is inspected using the first average value and the second average value. May be.

  According to the above configuration, the average value of the sum of squares of a predetermined plurality of conductivity measured continuously is calculated, so that the partial concentration deviation of the component dissolved in the cleaning liquid, the flow rate, etc. The degree of cleaning can be inspected by further smoothing the influence on the conductivity. For this reason, it is possible to inspect the cleaning degree of the object to be cleaned with higher accuracy.

(4) The cleaning degree inspection apparatus may further include a particle sensor that detects particles in the cleaning liquid. And the said cleaning degree test | inspection part may test | inspect the cleaning degree of a washing | cleaning target based on the detection result by a particle sensor.

  According to the above configuration, it is possible to inspect the cleaning degree of the cleaning object based on the detection result of not only the components dissolved in the cleaning liquid but also the particles (impurities not dissolved) in the cleaning liquid.

(5) The cleaning degree inspection method according to the present invention is a cleaning degree inspection method for inspecting the degree of cleaning of an object to be cleaned with a cleaning liquid. The cleaning degree inspection method includes a first measurement step for measuring the conductivity of a cleaning liquid that is not used for cleaning the object to be cleaned, and a second method for measuring the conductivity of the cleaning liquid used for cleaning the object to be cleaned. A measurement step, and a cleanliness measurement step of inspecting the cleanliness of the object to be cleaned using the conductivity measured in the first measurement step and the conductivity measured in the second measurement step.

  According to the said structure, there exists an effect similar to invention of (1).

It is a figure which shows the washing | cleaning system which concerns on this embodiment. It is a front view of the cleaning degree inspection device concerning this embodiment. It is a side view of the cleaning degree inspection device concerning this embodiment. It is a top view of the cleaning degree inspection device concerning this embodiment. It is a board | substrate mounted in the cleaning degree inspection apparatus which concerns on this embodiment. It is a graph which shows transition of the inspection value about water supply (city water), and transition of the inspection value about drainage. It is a graph which shows transition of the measurement result of the electrical conductivity of the cleaning liquid with a mannitol concentration of 0.1 percent, the cleaning liquid with a mannitol concentration of 1 percent, and city water. It is the graph which showed the test value computed from the measurement result of the electrical conductivity of the washing liquid of mannitol concentration 0.1% shown in Drawing 5A, and city water. It is the graph which showed the average value calculated using the sample acquired 10 points | pieces for every predetermined period. It is the graph which showed the average value calculated using the sample acquired 200 points | pieces for every predetermined period. It is the graph which showed the average value calculated using the sample acquired 500 points | pieces for every predetermined period. It is the graph which showed the average value calculated using the sample acquired 1000 points | pieces for every predetermined period. It is a figure which shows an example of the flow path of the washing | cleaning liquid in the cleaning degree test | inspection apparatus concerning this embodiment. It is a block diagram which shows an example of the electrical constitution of the cleaning degree test | inspection apparatus concerning this embodiment. It is a timing chart which shows an example of the opening / closing of a valve | bulb and the drive of a motor, and a stop timing of the cleanliness inspection apparatus concerning this embodiment.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

(Outline of cleaning system)
First, a cleaning system 100 including a cleaning degree inspection apparatus 1 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  The cleaning system 100 includes a cleaning device 300 that cleans the cleaning object O with the cleaning liquid W, and a cleaning degree inspection device 1 that inspects the cleaning degree of the cleaning object O. In the present embodiment, the cleaning device 300 and the cleaning level inspection device 1 are separate bodies, but may be formed integrally. In the present embodiment, the object to be cleaned O is, for example, a medical container made of plastic or glass, but is not particularly limited to a medical container or the like.

  The cleaning apparatus 300 includes a cleaning container 301 for arranging the cleaning object O, and the cleaning liquid W is continuously supplied (inflowed) to the cleaning container 301 for a predetermined time, so that the cleaning object O is Washed. The cleaning liquid W before flowing into the cleaning container 301, that is, the cleaning liquid W that is not used for cleaning the cleaning object O is hereinafter referred to as “water supply W1”. In addition, as the water supply W1, water (for example, city water W11), purified water W12, etc. can be used, for example.

  The cleaning liquid W used for cleaning the cleaning target object O flows out from the cleaning container 301. The cleaning liquid W used for cleaning is hereinafter referred to as “drainage W2”.

  The cleaning degree inspection apparatus 1 includes a conductivity meter EC1 (corresponding to the “first measurement unit” of the present invention) that measures the conductivity of a cleaning liquid W (feed water W1) that is not used for cleaning the cleaning object O, and a cleaning. Conductivity meter EC2 (corresponding to the “second measuring part” of the present invention) that measures the conductivity of the cleaning liquid W (drainage W2) used for cleaning the object O, and the conductivity measured by the conductivity meter EC1 And a CPU 101 (see FIG. 8, corresponding to the “cleaning degree inspection unit” of the present invention) that inspects the degree of cleaning of the object to be cleaned O using the conductivity measured by the conductivity meter EC2.

  According to the said structure, the cleaning degree of the washing | cleaning target object O is test | inspected using the electrical conductivity of the waste_water | drain W2. Here, as cleaning of the cleaning object O proceeds, components dissolved in the waste water W2 (components such as cleaning agents and dirt adhering to the cleaning object O. Hereinafter, described as “cleaning-derived components”) Therefore, the lower the conductivity, the higher the cleaning degree of the cleaning object O. For this reason, by using the conductivity of the waste water W2, it is possible to inspect the cleaning degree of the cleaning object O according to the amount of the component dissolved in the waste water W2.

  Furthermore, since the conductivity of the water supply W1 is also used for the inspection of the cleaning degree of the cleaning object O, the conductivity caused by the components dissolved in the water supply W1 before the cleaning is inspected for the cleaning degree of the cleaning object O. Can be used. For example, by comparing the conductivity of the water supply W1 and the conductivity of the drainage W2, the conductivity due to the component dissolved in the drainage W2 by the cleaning of the cleaning object O can be acquired. For this reason, it is possible to accurately inspect the degree of cleaning of the cleaning object O without being affected by the noise component dissolved in the cleaning liquid W before the cleaning.

  Further, the cleaning degree inspection apparatus 1 includes a first inflow pipe 2 into which a part of the cleaning liquid W (feed water W1) before flowing into the cleaning target object O is branched from the cleaning liquid W before flowing in and the cleaning target And a second inflow pipe 3 into which the cleaning liquid W (drainage W2) used for cleaning the object O is supplied. The conductivity meter EC1 continuously measures the conductivity of the cleaning liquid W (feed water W1) that has flowed into the first inflow pipe 2. The conductivity meter EC2 continuously measures the conductivity of the cleaning liquid W (drainage W2) that has flowed into the second inflow pipe 3.

  The CPU 101 acquires the conductivity measured by the conductivity meter EC1 and the conductivity measured by the conductivity meter EC2 at a predetermined sampling period, and continuously acquires a predetermined plurality of values acquired from the conductivity meter EC1. The degree of cleaning of the object to be cleaned O is inspected using the (predetermined sample number) conductivity and the predetermined plural (predetermined sample number) conductivity obtained from the conductivity meter EC2.

  Explaining a specific example, the CPU 101 calculates the average value of the square sum of the conductivity of a predetermined number of samples continuously measured by the conductivity meter EC1 as the first average value, and continuously by the conductivity meter EC2. The average value of the square sum of the measured electrical conductivity of the predetermined number of samples is calculated as the second average value, and the cleaning degree of the cleaning object O is inspected using the first average value and the second average value. For example, the CPU 101 compares the first average value (or the value based on the first average value) with the second average value (or the value based on the second average value), thereby inspecting the cleaning degree of the cleaning object O. I do. In this example, the CPU 101 determines whether the difference between the first average value (or the value based on the first average value) and the second average value (or the value based on the second average value) is equal to or less than a predetermined threshold value. Is determined, the cleaning degree of the cleaning object O is inspected.

  According to the above configuration, by calculating the average value of the square sum of the conductivity of a predetermined number of samples, the conductivity such as the partial concentration deviation of the components dissolved in the feed water W1 and the drainage W2 and the flow velocity are obtained. The effect of this can be smoothed. For this reason, it is possible to inspect the cleaning degree of the cleaning object O with higher accuracy.

  The cleaning degree inspection apparatus 1 further includes a particle sensor PS1 (FIG. 7) that detects particles in the cleaning liquid W (drainage W2) used for cleaning the cleaning object O. Then, the CPU 101 inspects the cleaning degree of the cleaning object O based on the detection result by the particle sensor PS1. Accordingly, the degree of cleaning of the cleaning object O can be inspected based on the detection result of not only the cleaning-derived components dissolved in the cleaning liquid W but also the particles (cleaning-derived components not dissolved) in the cleaning liquid W. .

(Details of cleanliness inspection equipment)
Below, the detail of the cleaning degree test | inspection apparatus 1 is demonstrated using FIGS. 1-9.

(Details of cleanliness inspection device: mechanical configuration)
First, the mechanical configuration of the cleaning degree inspection apparatus will be described with reference to FIGS. 2A to 3. The cleaning degree inspection apparatus 1 includes a first inflow pipe 2, a second inflow pipe 3, a base 1A, and the like in a substantially rectangular parallelepiped casing with casters. The water supply W1 from the cleaning device 100 flows into the first inflow pipe 2. In the present embodiment, as the water supply W1, not only the city water W11 is used for cleaning the cleaning object O, but also the purified water W12 is used for rinsing processing for cleaning. For this reason, not only the city water W11 but also purified water W12 may flow into the first inflow pipe 2. The drainage water W2 flows into the second inflow pipe 3 as described above.

  As shown in FIG. 3, the base 1A includes a conductivity meter EC1 (conductivity converter), a conductivity meter EC2 (conductivity converter), a valve switching timer (TM1, TM2), and an A / D converter. (AD) etc. are installed.

  The conductivity meter EC1 continuously measures the conductivity of the feed water W1 flowing into the first inflow pipe 2 during a predetermined conductivity measurement period. The conductivity meter EC2 continuously measures the conductivity of the waste water W2 flowing into the second inflow pipe 3 during a predetermined conductivity measurement period. As these conductivity meters EC1 and EC2, for example, those manufactured by METTLER TOLEDO can be used. The particle sensor PS1 is a sensor that detects particles contained in the water supply W1 and the waste water W2. As the particle sensor PS1, for example, one made by Hokuto Electronics Co., Ltd. can be used.

  The CPU 101 inspects the cleaning degree of the cleaning object O based on the measurement results of the conductivity meters EC1 and EC2, and inspects the cleaning degree of the cleaning object O based on the detection result of the particle sensor PS1. Details will be described later with reference to FIG.

(Details of cleanliness inspection device: Inspection method for cleanliness of cleaning object O)
Hereinafter, a cleaning degree inspection method performed by the cleaning degree inspection apparatus 1 will be described with reference to FIGS. 4 to 6D. As described above, the first characteristic of the cleaning degree inspection method according to the present embodiment is that not only the conductivity of the waste water W2 but also the conductivity of the feed water W1 is used to obtain the conductivity caused by the component derived from the cleaning. Then, the cleaning degree of the cleaning object O is inspected.

  Hereinafter, the advantage of the first feature will be proved using FIG. In FIG. 4, the transition of the measurement result of the conductivity of the water supply W1 (city water W11) and the transition of the measurement result of the conductivity of the waste water W2 are shown. Specifically, for each of the city water W11 and the drainage W2, the conductivity is acquired at a predetermined sampling period, and the average sum of squares of the conductivity of the acquired predetermined number of samples in each period I, II, III, IV. A value obtained by squaring the value (hereinafter referred to as “inspection value”) is calculated, and FIG. 4 shows the calculated inspection value. Each of the periods I, II, III, and IV is a period each time a predetermined time (for example, 1000 ms) elapses from the start of measurement.

  As shown in FIG. 4, with the passage of time, the inspection value based on the conductivity of the drainage water W2 decreases and approaches the inspection value based on the conductivity of the water supply W1. In the period IV in which the cleaning is sufficiently advanced, these values match. From this, the difference between the conductivity of the waste water W2 and the conductivity of the feed water W1 is based on the component derived from the cleaning dissolved in the cleaning liquid W by the cleaning of the cleaning object O. It has been shown that the cleaning degree of the cleaning object O can be accurately inspected without being affected by the components.

  Furthermore, as described above, the second feature of the cleanliness inspection method according to the present embodiment is that the conductivity of the water supply W1 and the drainage W2 is acquired at a predetermined sampling period, and the water supply W1 and the drainage W2 are continuously obtained. An average value obtained by averaging the square sums of the conductivity of the obtained predetermined number of samples is calculated, and this average value is used for the inspection of the cleaning degree of the cleaning object O.

  Hereinafter, the advantage of the second feature of the present embodiment will be proved using FIGS. 5A to 6D. FIG. 5A shows the transition of the measurement results of the conductivity of the cleaning liquid W having a mannitol concentration of 0.1%, the cleaning liquid W having a mannitol concentration of 1%, and the city water W11. As shown in FIG. 5A, there is a significant difference between the conductivity of the cleaning liquid W having a mannitol concentration of 1 percent and the conductivity of the feed water W1. For this reason, when the cleaning-derived component dissolved in the cleaning liquid W is somewhat large, the cleaning degree of the cleaning object O should be accurately inspected using the conductivity of the waste water W2 and the conductivity of the feed water W1. It can be shown that

  However, as shown in FIG. 5A, there is no significant difference between the conductivity of the cleaning liquid W having a mannitol concentration of 0.1 percent and the conductivity of the city water W11. The reason for this is that the conductivity measurement results are non-uniform due to the flow rate of the cleaning liquid W or city water W11 having a mannitol concentration of 0.1 percent, partial concentration deviation of the dissolved components, etc. ( This is because there is variation. From this, when the cleaning of the cleaning object O proceeds and the components derived from the cleaning dissolved in the waste water W2 decrease, the conductivity of the cleaning object O is determined using the conductivity of the waste water W2 and the conductivity of the feed water W1. It is understood that it is difficult to perform the cleaning degree inspection with high accuracy. Therefore, when a high cleaning level is required, simply comparing the conductivity of the feed water W1 and the conductivity of the drainage W2 is insufficient in the accuracy of the cleaning degree inspection of the cleaning object O.

  Hereinafter, in the cleanliness inspection method according to the present embodiment, the influence on the conductivity such as partial concentration deviation and flow velocity of components dissolved in the water supply W1 and the wastewater W2 is smoothed by the second feature. Explain what you can do. FIG. 5B shows the inspection values calculated from the measurement results of the conductivity of the cleaning liquid W having a mannitol concentration of 0.1% shown in FIG. 5A and the conductivity of the city water W11. As described above, the inspection value is a value obtained by squaring the average value of the square sum of the conductivity of a predetermined number of samples. In FIG. 5B, the inspection value is calculated using 10 samples (conductivity) obtained for each period every time a predetermined time (for example, 1000 ms) elapses from the start of measurement. In the description of the right column of the graph, “1 to 10” indicates the conductivity from the first sample to the tenth sample (obtained during the period from the start of measurement until a predetermined time elapses). It is a value calculated using the measured conductivity). The other numerical ranges in the right column of the graph have the same meaning.

  As shown in the graph of FIG. 5B, there is a significant difference between the inspection value of the cleaning liquid W having a mannitol concentration of 0.1% and the inspection value of the city water W11. The reason for this is that, for the test value of the cleaning liquid W having a mannitol concentration of 0.1 percent and the city water W11, the average value obtained by averaging the square sum of the electrical conductivity of a predetermined number of samples is calculated, so that the dissolved component part This is because it is possible to smooth the influence of the concentration deviation, the flow velocity, etc. From this, by using the first average value that averages the square sum of the electrical conductivity of the predetermined number of samples for the drainage W2 and the second average value that averages the square sum of the electrical conductivity for the feed water W1, It is understood that even when the cleaning of the object O advances and the impurities contained in the cleaning liquid W decrease, the cleaning degree of the cleaning object O can be inspected with high accuracy. Therefore, in the cleaning degree inspection method according to the present embodiment, it is understood that the cleaning degree of the cleaning object O can be accurately performed by the second feature even when a high cleaning level is required. The

  Next, the relationship between the inspection accuracy of the cleaning degree of the cleaning object O and the number of samples will be described with reference to FIGS. 6A to 6D. 6A to 6D show the cleaning liquid W having a mannitol concentration of 0.1%, the cleaning liquid W of 0.01%, and the city water W11 in each period every predetermined time (for example, 1000 ms) from the start of measurement. An average value obtained by averaging the sum of squares of the conductivity of the obtained predetermined number of samples is shown (not an inspection value). 6A is a graph with 10 samples used for calculating the average value, FIG. 6B is a graph with 200 samples used for calculating the average value, and FIG. 6C is a sample number used for calculating the average value. 500 graph and FIG. 6D are graphs with 1000 samples used for calculation of the average value. 6A to 6D show that as the number of samples increases, the average value of each period for the same cleaning liquid W does not vary. From this, it is understood that the greater the number of samples, the more accurately the degree of cleaning of the cleaning object O is inspected, and it is understood that the number of samples is preferably 200 or more from the viewpoint of inspection accuracy.

(Details of cleanliness inspection device: flow path configuration of cleaning liquid W in cleanness inspection device)
Hereinafter, an example of the flow path configuration of the cleaning liquid W in the cleaning degree inspection apparatus 1 will be described with reference to FIG. First, as a premise of this description, an example of a method for supplying the water supply W1 to the cleaning device 300 and an example of a method for discharging the waste water W2 from the cleaning device 300 will be described with reference to FIG. The city water W11 and the purified water W12 are continuously supplied to the cleaning container 301 in the cleaning apparatus 300 as the feed water W1 for a predetermined time. The city water W11 and the purified water W12 are supplied through individual water supply pipes (not shown).

  The purified water W12 is supplied for a rinsing process after the cleaning result of the cleaning object O becomes good. Accordingly, the purified water W12 is supplied after the city water W11 is supplied. In the present embodiment, the cleaning degree of the cleaning object O is inspected not only when the city water W11 is supplied but also when the purified water W12 is supplied. However, the present invention is not limited to this. It is not necessary to perform the inspection.

  Further, the waste water W2 used for cleaning in the cleaning device 300 flows out of the cleaning device 300 through a drain pipe (not shown).

  Returning to FIG. 7, the cleaning degree inspection apparatus 1 includes a flow path pipe 11 connected to a flow path pipe 10 branched from a water supply pipe for supplying the city water W11 to the cleaning apparatus 300. Furthermore, the cleaning degree inspection apparatus 1 includes a flow path pipe 21 connected to a flow path pipe 20 branched from a water supply pipe for supplying purified water W12 to the cleaning apparatus. Note that the first inflow pipe 2 shown in FIG. 2B includes flow path pipes 11 and 21.

  A city water source valve V1 connected to the motor M1 is arranged in the middle of the flow path pipe 11, and a purified water source valve V2 connected to the motor M2 is arranged in the middle of the flow path pipe 21. By switching operation and stop of the motors M1 and M2, the opening and closing of these valves V1 and V2 can be controlled to control the inflow of the city water W11 and the purified water W12 into the cleanliness inspection apparatus 1. The channel pipe 11 and the channel pipe 21 are respectively connected to the channel pipe 12 at their downstream ends, and the city water W11 that has passed through the channel pipe 11 flows into the channel pipe 12, and the channel pipe The purified water W12 that has passed through 21 can flow into the flow pipe 12.

  In the present embodiment, as described above, the cleaning target object O is sufficiently cleaned using the city water W11, and then the cleaning target object O is rinsed using the purified water W12 as a finishing process. Therefore, both the city water source valve V1 and the purified water source valve V2 are not opened, and only one of the city water W11 and the purified water W12 flows into the flow path pipe 12. Yes. But it is not limited to this structure, The mixed liquid of the city water W11 and the purified water W12 may be flowed into the flow path pipe 12. FIG.

  A conductivity meter EC1 is disposed in the middle of the flow channel 12, so that the conductivity of the city water W11 and the purified water W12 flowing into the flow channel 12 can be measured. Yes. In addition, in this embodiment, although the electrical conductivity of the liquid mixture of the city water W11 and the purified water W12 is not measured, you may measure these electrical conductivity.

  A flow path pipe 13 is branched at a predetermined position downstream of the conductivity meter EC1 in the flow path pipe 12, and a water supply downstream valve V4 connected to the motor M4 is provided downstream of the predetermined position. Is arranged. By switching the operation and stop of the motor M4, the opening and closing of the water supply downstream valve V4 can be controlled. The city water W11 and the purified water W12 that have passed through the flow path pipe 12 are discharged to the outside of the cleaning degree inspection apparatus 1.

  Further, the cleaning degree inspection apparatus 1 includes a flow path pipe 31 connected to a flow path pipe 30 branched from a drain pipe (not shown) of the cleaning apparatus 300. The second inflow pipe 3 shown in FIG. 2B is composed of the flow path pipe 31 shown in FIG. The flow path pipe 31 has a flow path pipe 32 and a flow path pipe 35 connected to the downstream end of the flow path pipe 31 via a joint C1, and the waste water W2 flows into the flow path pipes 32 and 35 from the flow path pipe 31. Is done. The waste water W2 that has flowed into the flow channel pipe 35 is discharged to the outside of the cleanliness inspection apparatus 1 through the flow channel pipe 35.

  A drainage source valve V3 connected to the motor M3 is disposed in the middle of the flow path pipe 32. By switching between the operation and stop of the motor M3, the opening and closing of the drainage source valve V3 can be controlled, and the inflow of the drainage W2 into the cleanliness inspection apparatus 1 can be controlled. A conductivity meter EC2 is disposed on the downstream side of the drainage source valve V3 in the flow channel pipe 32, whereby the conductivity of the drainage water W2 flowing into the flow channel tube 32 can be measured. ing.

  A flow path pipe 33 and a flow path pipe 34 are connected to the downstream end of the flow path pipe 32 so as to branch into two from this end. The drainage water W2 from the channel pipe 32 flows into the channel pipe 33. The drainage water W2 passes through the channel pipe 33 and is discharged to the outside of the cleanliness inspection apparatus 1.

  Further, the downstream end of the above-described flow channel tube 13 is connected to the middle of the flow channel tube 34, and the particle sensor PS1 is disposed on the downstream side of the connection portion. As a result, the particle sensor PS1 can detect particles of the waste water W2 passing through the flow channel pipe 32 and flowing through the flow channel pipe 34, and also flows into the flow channel pipe 34 through the flow path tube 13. The particles of the city water W11 and the purified water W12 can be detected. In this embodiment, not only the particles of the city water W11 but also the particles of the purified water W12 are detected, but only one of the particles of the city water W11 and the particles of the purified water W12 may be detected.

  A water supply / sensor valve V5 connected to the motor M5 is disposed in the middle of the flow path pipe 13, and the drainage connected to the motor M6 is upstream of the particle sensor PS1 in the flow path pipe 34. -An inter-sensor valve V6 is arranged. By switching the operation and stop of the motors M5 and M6, the water supply / sensor valve V5 and the drain / sensor valve V6 can be switched.

  The water supply / sensor valve V5 and the drainage / sensor valve V6 are alternatively switched to the open state, and neither of them is opened. Accordingly, the particle sensor PS1 detects any one of the particles of the water supply W1 (city water W11 and purified water W12) and drainage W2.

  The city water W11 or the waste water W2 that has passed through the flow path pipe 34 is discharged to the outside of the cleaning degree inspection apparatus 1.

(Details of cleanliness inspection device: electrical configuration of cleanliness inspection device)
Hereinafter, the electrical configuration of the cleaning degree inspection apparatus 1 will be described with reference to FIG. In addition to the above-described conductivity meters EC1, EC2, particle sensor PS1, and motors M1 to M6, the cleaning degree inspection apparatus 1 includes a CPU 101, an A / D converter 102, a drive control circuit 103, a monitor 104, a RAM 105, a ROM 106, and an operation. Part 107 and the like.

  The CPU 101 is communicably connected to the A / D converter 102, the drive control circuit 103, the monitor 104, the RAM 105, the ROM 106, the operation unit 107, and the like via a bus (not shown). The monitor 104 is, for example, a liquid crystal display panel. The RAM 105 functions as a working memory for the CPU 101. The ROM 106 stores a startup program for the cleaning degree inspection apparatus 1 and the like. The operation unit 107 is, for example, a touch panel and receives user operations.

  Also, conductivity meters EC1 and EC2 are connected to the CPU 101 via the A / D converter 102. As a result, analog signals indicating the conductivity measured by the conductivity meters EC1 and EC2 are continuously input to the A / D converter 102 from the conductivity meters EC1 and EC2. The analog signal is converted into digital data (conductivity data) by the A / D converter 102 and input to the CPU 101.

  The CPU 101 acquires the input conductivity data at a predetermined sampling period and stores it in the RAM 105. The RAM 105 can store a plurality of predetermined conductivity data (predetermined number of samples) for each of the conductivity meters EC1 and EC2, and among the conductivity data stored in the RAM 105, New conductivity data is stored so as to overwrite the oldest conductivity data. Then, the CPU 101 inspects the cleaning degree of the cleaning object O using the conductivity data of a predetermined number of samples stored in the RAM 105.

  As a specific example, the CPU 101 acquires a predetermined number of samples of conductivity data for the conductivity meter EC1 from the RAM 105 at every predetermined sampling period. And CPU101 calculates the average value (1st average value) of the square sum of each conductivity which these acquired conductivity data show, and the test value ("Water supply W1 of water supply W1"). Calculated as “inspection value”). Similarly, the CPU 101 acquires conductivity data of a predetermined number of samples for the conductivity meter EC2 from the RAM 105. Then, the CPU 101 calculates an average value (second average value) of the sum of squares of the respective conductivity indicated by the acquired conductivity data, and an inspection value (“inspection of the drainage W2” obtained by square root of the second average value). Value)).

  The CPU 101 calculates the difference between the inspection value of the water supply W1 and the inspection value of the drainage W2, and inspects the degree of cleaning of the object to be cleaned O based on whether the difference is equal to or less than a predetermined threshold value. If it is less than or equal to the threshold value, it is determined that the test result is good. Note that it is not always necessary to calculate the difference between the inspection value of the water supply W1 and the inspection value of the waste water W2, and the inspection value of the water supply W1 and the inspection value of the waste water W2 are compared by another method, and the cleaning object O The degree of cleaning may be inspected.

  In the present embodiment, the inspection value of the water supply W1 and the inspection value of the waste water W2 are calculated, and the inspection value of the water supply W1 and the inspection value of the waste water W2 are used for the inspection of the cleaning degree of the cleaning object O. It is not necessary to calculate the inspection value of W1 and the inspection value of drainage W2. For example, the cleaning degree of the inspection object O may be inspected by directly comparing the first average value for the water supply W1 and the second average value for the drainage W2.

  The CPU 101 displays on the monitor 104 the inspection result of the degree of cleaning of the cleaning object O (the inspection result is defective or good). Further, the CPU 101 may display the calculated inspection value of the water supply W1, the inspection value of the drainage W2, and the like on the monitor 104. For example, the CPU 101 can also display graphs as shown in FIGS. 6A to 6D.

  Further, the particle sensor PS <b> 1 is connected to the CPU 101 via the A / D converter 102. Thus, an analog signal indicating the amount of particles detected by the particle sensor PS1 is input to the A / D converter 102. This analog signal is converted into digital data (particle amount data) by the A / D converter 102. The particle amount data is input from the A / D converter 102 to the CPU 101.

  The CPU 101 acquires input particle amount data every predetermined time, and inspects the cleaning degree of the cleaning object O based on the particle amount data. As a specific example, the CPU 101 inspects the cleaning degree of the cleaning object O using the particle amount of the waste water W2 indicated by the particle data. In addition, there is a possibility that particles are mixed in the water supply W1 in advance. In order to inspect the cleaning degree of the object to be cleaned O in consideration of such particles, in this embodiment, not only the amount of particles of the waste water W2 but also the amount of particles of the water supply W1 is detected and used for the inspection of the degree of cleaning. It is done. For example, the particle amount of the water supply W1 (city water W11, purified water W12) is detected every predetermined period in a predetermined period before the cleaning of the cleaning object O or before the start of the rinsing process, and the detected particle amount Is calculated as an initial value. Then, the inspection result is determined by comparing the initial value with the particle amount of the waste water W2. As a specific example, if the value obtained by subtracting the initial value from the amount of particles in the water supply W1 is equal to or smaller than a predetermined threshold value, it is determined that the inspection result is good. Note that the particle amount of the water supply W1 does not necessarily need to be detected, and when the particle amount of the waste water W2 is equal to or less than a predetermined threshold, the test result of the cleaning degree may be good. The CPU 101 may display the inspection result on the monitor 104.

  In the present embodiment, the cleaning apparatus 300 and the cleaning degree inspection apparatus 1 are configured to be communicable, and the setting is changed so that the cleaning degree inspection apparatus 1 automatically performs the rinsing process with the purified water W12. However, when the user (cleaner) confirms that both the inspection result based on the conductivity and the inspection result based on the particle amount are good by the monitor 104, the cleaning with the city water W11 is terminated. You may change the setting of the washing | cleaning apparatus 300 so that the rinse process by the purified water W12 may be performed. In the present embodiment, the conductivity measurement and particle detection are performed on the purified water W12 in the rinsing process similarly to the city water W11, but the conductivity measurement and particle detection are performed on the purified water W12. Without cleaning, the cleaning degree of the cleaning object O need not be inspected during the rinsing process.

  The CPU 101 controls the opening and closing of the valves V <b> 1 to V <b> 6 by transmitting a drive signal instructing the drive control circuit 103 to operate the motors M <b> 1 to M <b> 6. Hereinafter, the opening and closing timings of the valves V1 to V6 are associated with the periods of measurement of the conductivity of the water supply W1 and drainage W2 by the conductivity meters EC1 and EC2, and the period of detection of the particles of the water supply W1 and drainage W2 by the particle sensor PS1. I will explain.

(Details of cleanliness inspection device: Opening and closing timing of each valve V1 to V6)
An example of the opening / closing timing of the valves V1 to V6 will be described with reference to FIGS. FIG. 9 also shows a period in which the CPU 101 receives signals from the conductivity meters EC1 and EC2 and the particle sensor PS1, but the CPU 101 does not start the cleaning test (for example, when the power is turned on). Reception of signals is started, and reception of these signals is terminated when the operation of the cleaning degree inspection apparatus 1 is stopped (for example, when the power is turned off).

  First, at the start timing t1 of the cleaning degree inspection process, the CPU 101 opens the city water source valve V1 and the water supply / sensor valve V5. Thereby, city water flows into the particle sensor PS1. (Start of inspection period using city water W11 and drainage W2). At the timing t2 thereafter, the CPU 101 closes the water supply / sensor valve V5. During the period from the timing t1 to the timing t2 (for example, about 1 minute), the CPU 101 acquires the particle amount of the city water W11 for each predetermined period based on the signal from the particle sensor PS1, and these acquired particles. The average amount is calculated as the initial value. For the calculation of the initial value, the amount of particles acquired after the amount of particles equal to or greater than the predetermined value has been stably detected (for example, the amount of particles acquired for 20 to 40 seconds) is used. The initial value indicates the amount of particles that are not derived from the cleaning of the cleaning object O and are contained in the city water W11 in advance.

  At timing t2, the CPU 101 closes the water supply / sensor valve V5 and ends the calculation of the initial value. Then, the CPU 101 opens the water supply downstream valve V4, and the city water W11 is continuously flowed into the conductivity meter EC1. Thereby, the measurement of the conductivity of the city water W11 is started. Further, the drainage source valve V3 is opened at the timing t1, and the drainage W2 continuously flows into the conductivity meter EC21 at the timing t2. Thereby, the conductivity measurement of the waste water W2 is started. The CPU 101 determines the conductivity data for each predetermined sampling period when the conductivity indicated by the signals (conductivity data) input from the conductivity meters EC1 and EC2 is greater than a predetermined value (for example, 0). Is acquired and stored in the RAM 105. Each time the CPU 101 acquires the conductivity data, the CPU 101 acquires the inspection value using the predetermined number of sample conductivity data for each of the city water W11 and the drainage water W2, and the difference between these inspection values is a predetermined threshold value. It is judged whether it is below or not, and it was judged whether the inspection result of the cleaning degree of the cleaning object O became good.

  Further, at the timing t2, the CPU 101 opens the drainage / sensor valve V6 and causes the drainage W2 to flow into the particle sensor PS1. And CPU101 starts the process which acquires the particle amount of the waste_water | drain W2 for every predetermined period based on the signal from particle sensor PS1. When the particle amount of the waste water W2 is acquired, the CPU 101 determines whether or not the difference between the initial value calculated in the period from the timing t1 to the timing t2 and the acquired particle amount is equal to or less than a predetermined threshold value. Then, it is determined whether or not the inspection result of the cleaning degree of the cleaning object O is good.

  At the timing t3 when the CPU 101 determines that the cleaning result of the cleaning object O based on the conductivity becomes good and the cleaning result of the cleaning object O based on the particle amount has improved, the valve 101 V1, V3, V4, and V6 are closed, and a cleaning completion signal is transmitted to the cleaning machine 300 (end of the inspection period using the city water W11 and the waste water W2). Upon receiving this cleaning completion signal, the cleaning machine 300 ends the cleaning of the cleaning object O using the city water W11 and starts the cleaning process (rinsing process) of the cleaning object O using the purified water W12. Note that the CPU 101 may display the cleaning completion on the monitor 104 instead of or in addition to transmitting the cleaning completion signal to the cleaning machine 300. Then, the user may manually switch the setting of the cleaning machine 300 from the cleaning of the cleaning object O using the city water W11 to the rinsing process.

  Thereafter, at timing t4 when the rinsing process is started in the cleaning device 300, the CPU 101 switches the purified water source valve V2 and the water supply / sensor valve V5 to the open state, and causes the purified water W12 to flow into the particle sensor PS1. Thereby, the CPU 101 receives a signal indicating the amount of particles of the purified water W12 from the particle sensor PS1. At subsequent timing t5, the CPU 101 changes the water supply / sensor valve V5 to the closed state. In a period from timing t4 to timing t5, the CPU 101 acquires the particle amount of the purified water W12, and calculates an initial value for the purified water W12 using the acquired particle amount. This initial value calculation method is the same as the initial value calculation method for the city water W12.

  At timing t5, the CPU 101 opens the water supply downstream valve V4 and the purified water W12 flows into the conductivity meter EC1. Thereby, the measurement of the conductivity of the purified water W12 is started. . Further, the drainage source valve V3 is opened at the timing t4, and the drainage water W2 flows into the conductivity meter EC21 at the timing t5. Thereby, the conductivity measurement of the waste water W2 is started. The CPU 101 determines the conductivity data for each predetermined sampling period when the conductivity indicated by the signals (conductivity data) input from the conductivity meters EC1 and EC2 is greater than a predetermined value (for example, 0). Is acquired and stored in the RAM 105. Each time the CPU 101 acquires conductivity data, the CPU 101 acquires test values for the purified water W12 and the drainage W2 using conductivity data of a predetermined number of samples, and the difference between these test values is less than a predetermined threshold value. It is determined whether or not there is a good cleaning result of the cleaning degree of the cleaning object O.

  At timing t5, the CPU 101 opens the drainage / sensor valve V6 and causes the drainage W2 to flow into the particle sensor PS1. Thereby, the CPU 101 starts a process of acquiring the particle amount of the waste water W2 at predetermined intervals based on the signal from the particle sensor PS1. The CPU 101 determines whether or not the difference between the initial value calculated in the period from the timing t4 to the timing t5 and the acquired particle amount is equal to or less than a predetermined threshold value, and the cleaning result inspection result of the cleaning object O Judge whether or not is better.

  At the timing t6 when the CPU 101 determines that the cleaning result of the cleaning object O based on the conductivity becomes good and the cleaning result of the cleaning object O based on the particle amount becomes good, the valve 101 V2, V3, V4, and V6 are closed, and a rinse processing completion signal is transmitted to the washing machine 300 (end of the inspection period using the purified water W12 and the waste water W2). The washing machine 300 that has received the signal indicating the completion of the rinsing process ends the rinsing process. Note that the CPU 101 may display the completion of the rinsing process on the monitor 104 instead of or in addition to transmitting the rinsing process completion signal to the cleaning machine 300. Then, the user may manually switch the setting of the washing machine 300 so as to end the rinsing process.

  As described above, in the present embodiment, the CPU 101 performs the cleaning degree inspection based on the particle amount and the cleaning degree inspection based on the conductivity in parallel, but this is not restrictive. For example, the cleaning degree inspection based on the conductivity may be performed first, and when the inspection result is good, the cleaning degree inspection based on the particle amount may be performed. Conversely, the cleaning degree inspection based on the particle amount may be performed first, and then the cleaning degree inspection based on the conductivity may be performed.

  In the present embodiment, after the cleaning degree of the cleaning object O using the city water W11 is checked, the cleaning degree of the cleaning object O using the purified water W12 is started. Only one of W11 and purified water W12 may be inspected for cleanliness.

  The opening / closing timings of the valves V1 to V6 and the start and end timings of reception of signals from the conductivity meters EC1, EC2 and the particle sensor PS1 are merely examples, and can be changed as appropriate.

(Modification)
In the present embodiment, the average value (first average value) of the square sum of the conductivity of a predetermined number of samples continuously measured by the conductivity meter EC1 is calculated and continuously measured by the conductivity meter EC2. An average value (second average value) of the sum of squares of the conductivity of a predetermined number of samples is calculated, and these first average value and second average value are used for the inspection of the cleaning degree of the cleaning object O. It is not an essential configuration of the present invention to calculate the first average value and the second average value. If the degree of cleanliness is not so necessary, or if there is a large difference in conductivity even with a small amount of dissolved component, by directly comparing the conductivity measured by the conductivity meter EC1, EC2, The cleaning degree of the cleaning object O may be inspected. In this case, for example, by subjecting each conductivity measured by the conductivity meters EC1 and EC2 to filter processing, the object to be cleaned is not affected by noise components dissolved in the cleaning liquid W in advance. The cleaning degree of O can be inspected.

DESCRIPTION OF SYMBOLS 1 Cleanliness inspection apparatus 2 1st inflow pipe 3 2nd inflow pipe 101 CPU (cleanliness inspection part)
EC1 conductivity meter (first measurement unit)
EC2 conductivity meter (second measuring unit)
PS1 Particle sensor W Cleaning liquid W1 Water supply (cleaning liquid not used for cleaning)
W2 drainage (cleaning solution used for cleaning)
O Object to be cleaned

Claims (3)

A cleaning degree inspection device for inspecting the degree of cleaning of an object to be cleaned with a cleaning liquid,
A first measuring unit that measures the conductivity of the cleaning liquid that is not used for cleaning the cleaning object;
A second measuring unit for measuring the conductivity of the cleaning liquid used for cleaning the cleaning object;
A cleanliness inspection unit that inspects the cleanliness of the object to be cleaned using the conductivity measured by the first measurement unit and the conductivity measured by the second measurement unit ;
A particle sensor disposed downstream of the first measurement unit and the second measurement unit;
A water supply / sensor valve disposed between the first measuring unit and the particle sensor;
A drainage / sensor valve disposed between the second measurement unit and the particle sensor,
The particle sensor passes through one of the first measurement unit and the second measurement unit by selectively switching the water supply / sensor valve and the drain / sensor valve to an open state. Detecting the amount of particles of the washing water,
In the cleaning degree inspection unit, a difference between a particle amount of the cleaning water that has passed through the first measurement unit and a particle amount of the cleaning water that has passed through the second measurement unit by the particle sensor is equal to or less than a predetermined threshold. A cleaning degree measuring device for inspecting the cleaning degree of the object to be cleaned. The cleaning liquid flows into the cleaning object continuously for a predetermined time,
A first inflow pipe into which a part of the cleaning liquid before flowing into the object to be cleaned is branched and flows from the cleaning liquid before flowing in;
A second inflow pipe into which a cleaning liquid used for cleaning the object to be cleaned flows,
The first measuring unit continuously measures the conductivity of the cleaning liquid flowing into the first inflow pipe,
The second measuring unit continuously measures the conductivity of the cleaning liquid flowing into the second inflow pipe,
The cleanliness inspection unit acquires the conductivity measured by the first measurement unit and the conductivity measured by the second measurement unit at a predetermined sampling period, and continuously from the first measurement unit. The degree of cleaning of the object to be cleaned is inspected using the predetermined plurality of conductivity acquired and the predetermined plurality of conductivity acquired continuously from the second measurement unit. The cleaning degree inspection apparatus according to 1.   The cleaning degree inspection unit calculates an average value of the sum of squares of a plurality of predetermined conductivity values obtained continuously from the first measurement unit as a first average value, and continuously calculates the second measurement unit. The average value of the sum of squares of the predetermined plurality of conductivities obtained from is calculated as a second average value, and the degree of cleaning of the object to be cleaned is calculated using the first average value and the second average value. The cleaning degree measuring apparatus according to claim 1 or 2, wherein the cleaning degree measuring apparatus is inspected.

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