JP4829636B2 - Water circulation type compressor equipped with an evaluation device for residual treatment capacity of ion-exchanged deionizers - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To numerically evaluate a residual treatment capacity of an ion exchange demineralizer. <P>SOLUTION: A total treatment capacity value A<SB>ALL</SB>of the demineralizer is calculated from total pure water collection amount (standard total pure water collection amount) in a demineralizer to be evaluated when standard water having a prescribed electric conductivity is used as water to be treated, as A<SB>ALL</SB>=(standard total pure water collection amount)&times;(the electric conductivity of the standard water). The passage amount L of raw water through the demineralizer, and the electric conductivity S of the raw water at the primary side of the demineralizer are measured. The treatment capacity reduction A<SB>LOSS</SB>due to the passage of the raw water is calculated from the passage amount L and the electric conductivity S as A<SB>LOSS</SB>=S&times;L. The residual treatment capacity value A<SB>REST</SB>of the demineralizer is calculated as A<SB>REST</SB>=A<SB>ALL</SB>-A<SB>LOSS</SB>. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a residual treatment capacity evaluation method and an evaluation apparatus for an ion exchange type deionizer. More specifically, the residual treatment capacity of an ion exchange type deionizer is quantified, and based on the obtained numerical value, for example, The present invention relates to a method and an apparatus for evaluating the amount of pure water that can be collected before replacing a water bottle (cartridge in the case of a cartridge type), the number of times it is used, the time (operating time) until replacement, and the like.

  As an example of the use of a water purifier, the case where it is installed in a water circulation compressor will be described as an example. This water circulation compressor cannot use an air working machine that dislikes the supply of compressed air containing oil or compressed air containing oil. For example, in order to obtain compressed air to be used in the field of food production, for example, instead of oil used for cooling, sealing, and lubrication, water is sucked together with air to compress the sucked air.

  In this water circulation compressor, the water supplied into the compressor body together with the air is discharged together with the compressed air, introduced into the separator receiver tank, and separated into compressed air and water in the separator receiver tank. The circulating water separated from the compressed air in the separator receiver tank is supplied again to the compressor body through a radiator, a filter, etc., and used for cooling, sealing, etc. during the compression work.

  As described above, in the water circulation type compressor, a circulating water circulation system formed by the compressor body, the separator receiver tank, the radiator and the pipes connecting these is formed. Is configured such that a water supply circuit connected to an external water supply source (not shown) is connected, and supply water can be introduced from the water supply source into the circulation circuit of the circulating water by opening and closing an on-off valve provided in the water supply circuit. The supply water can be introduced into the circulation system of the circulating water when the circulating water is exchanged or when the circulating water is insufficient.

  By the way, as the supply water from the external water supply source, tap water (water supply) is generally used, but this supply water contains impurities such as metal ions. For this reason, if such supply water containing impurities is introduced into the circulating system, the metal ions in the circulating water concentrate when the circulating water evaporates and decreases due to heat during compression work. As a result, the concentrated metal ions crystallize and precipitate, causing problems such as clogging of piping.

  Therefore, in order to correct such harmful effects caused by the deposition of metal ions, a water circulation compressor is provided with a deionizer, and impurities contained in the water supplied from the external water supply source are removed in advance by this deionizer. It has been proposed to introduce it into the circulation system after approaching water (see Patent Document 1).

  The pure water device used for the above-mentioned purposes is called an ion exchange type, and is treated when the introduced raw water (water before treatment) passes through the ion exchange resin filled inside. Thus, it is configured to be discharged in a state close to pure water or pure water.

  In such an ion exchange type deionizer, the capacity of the ion exchange resin filled therein decreases as it is used, and it becomes impossible to obtain treated water with a required purity.

  Therefore, when the processing capacity is reduced in this way, it is necessary to replace the cartridge containing the ion exchange resin or the pure water device itself.

  In order to display the replacement time of the ion exchange resin cartridge or the deionizer, the electric conductivity of pure water is measured on the secondary side of the deionizer, and the measured value is determined in advance. A method has been proposed in which it is determined that the end point of the ion exchange resin is reached when the reference value is exceeded (see Patent Document 2).

Prior art document information of the present invention includes the following.
Japanese Patent No. 30653302 Japanese Patent No. 3209488

  In the invention described in the above-mentioned Patent Document 2, the amount of impurities such as metal ions contained in the water after treatment by the pure water device increases as the impurity removal capability of the ion exchange resin of the pure water device decreases due to use. Focusing on the fact that the electrical conductivity of water that has passed through the deionizer also increases, the end point of the ion exchange resin is judged based on the increase in the electric conductivity on the secondary side of the deionizer, and notification is made. It is composed.

  For this reason, when the end point of the ion exchange resin is notified, the ion exchange resin is already unusable. Therefore, when used in a deionizer built into equipment that requires the supply of deionized water, for example, a deionizer built in the above-mentioned water circulation compressor, when the end point of the ion exchange resin is notified, it already contains impurities. There is a possibility that water is being supplied to the circulating system of the circulating water.

  In order to prevent the supply water containing impurities from being introduced into the circulation system of the circulating water, for example, when it is determined that the ion exchange resin of the deionizer is at the time of replacement, Although it is conceivable to stop the compressor, it is not possible to restart the compressor until the ion exchange resin or the deionizer itself is replaced. In the meantime, work using the compressor is also stopped.

  In addition, it is conceivable to set a numerical value as a reference for the determination with a margin, but the electrical conductivity on the secondary side of the deionizer is before the performance degradation of the ion exchange resin occurs. It shows a stable numerical value and hardly changes. Once the performance starts to deteriorate, it rises rapidly, and the amount of impurities mixed in increases in a relatively short time (electric conductivity increases: see FIG. 6). In the water circulation type compressor, pure water having an electric conductivity of 1 μS / cm or less is introduced into the circulation system as an example, so it is difficult to secure a numerical range with a margin from the beginning.

  Thus, in the case of the conventional method, if the end point of the ion exchange resin is notified in any case, it is necessary to stop the compressor immediately and replace the deionizer or the ion exchange resin. is there.

  For this reason, for example, if an ion exchange resin or a deionizer for replacement is ordered from a distributor after notification that the ion exchange resin has reached the end point, water containing impurities may be introduced into the compressor. Or, the operation using the compressor is stopped for a long time, and the meaning of the configuration that displays the turning angle and the replacement time of the ion exchange resin is lost. Therefore, despite the fact that it is relatively expensive, it is necessary to make preparations for exchanges that cannot be seen at any time, such as always stocking ion-exchange resin cartridges and deionizers for replacement.

  The above-mentioned problems of the prior art are due to the fact that the notification is made only after the end point of the ion exchange resin arrives, and it can be solved if the time for replacement of the ion exchange resin can be predicted in advance. To do.

  However, as described above, the performance of the ion exchange resin shows a stable state with almost no change until the deterioration starts, and therefore the ion exchange resin reaches the end of the electrical conductivity on the secondary side of the water purifier. Until then, there is almost no change (see FIG. 6).

  Therefore, as long as the electrical conductivity of the secondary side of the deionizer is measured and compared with the reference value to judge the performance of the ion exchange resin, the end point has to be judged afterwards. It is not possible to predict the arrival of the replacement time in advance.

  In addition, since the time when the above-mentioned change in electrical conductivity appears is affected by the quality of the water to be treated, in general, a water-circulation compressor that uses tap water as the supply water is subject to treatment depending on the region and season. Since the quality of the supplied water changes, it cannot be predicted based on, for example, the amount of water that has passed through the deionizer.

  Therefore, the present invention evaluates the remaining treatment capacity of this pure water device as a numerical value in an ion exchange type pure water device, and makes it possible to predict the amount of pure water that can be collected before replacement, the number of times of use, the time of use, and the like. It is an object of the present invention to provide an apparatus for making it possible to predict in advance the replacement time of an ion exchange resin, which is impossible with the above-described conventional technology.

In order to achieve the above object, the water circulation type compressor of the present invention is provided with a remaining processing capacity evaluation device that evaluates the remaining processing capacity of an ion exchange type deionizer by the following method.
Water with a predetermined electrical conductivity is standard water, and when this standard water is treated, the total pure water sampling amount (standard total pure water sampling amount) in the pure water device to be evaluated and the standard water electrical conductivity The product with the rate is the total treatment capacity value A _{ALL of the} water purifier,
When the raw water is introduced into the pure water device, the passage amount L of the supply water to the pure water device is measured, and the electrical conductivity S of the raw water is measured on the primary side of the pure water device, so that the raw water passes. The product of the quantity L and the electrical conductivity S is defined as a treatment capacity reduction value A _{LOSS of the} pure water device that has been reduced by the passage of the raw water,
Wherein the total capacity value A _ALL, by subtracting the capacity reduction value A _LOSS, capacity remaining values A _REST and be Rukoto of the pure water device.

In other words, the remaining treatment capacity of the deionizer is given by
Total treatment capacity value A _ALL = standard water electrical conductivity x standard total pure water sampling amount Treatment capacity reduction value A _LOSS = raw water electrical conductivity S x raw water passage amount L
Processing capacity remaining value A _REST = Total processing capacity value A _{ALL -Processing} capacity decrease value A _LOSS
It is evaluated as a numerical value calculated based on

In the evaluation method, each time the raw water is passed through the pure water device, the electrical conductivity and the amount of the raw water are measured, and the reduction value of the treatment capacity is obtained each time.
By summing the reduced values of the throughput due to the passage of the raw water to the most recent times from the first time, Ru can be subtracted from the total capacity value.

That is,
Reduced processing capacity due to the first water supply = A _LOSS1
Treatment capacity decrease due to the 2nd water supply = A _LOSS2
When processing capacity decrease value by nth water supply = A _LOSSn ,
Residual treatment capacity value A _RESTn at the time of n-th water supply,
A _RESTn = A _ALL − (A _LOSS1 + A _LOSS2 +... A _LOSSn ) or
Based on the processing capacity remaining value A _RESTn-1 obtained at the time of the n- _1th water supply,
Determined as _{A RESTn = A RESTn-1 -A} LOSSn.

Furthermore, in the evaluation method, the electrical conductivity measurement when the raw water passes is performed a plurality of times every predetermined time, and the processing capacity decrease value is calculated based on the measured average value of the electrical conductivity. it is Ru can be.

Further, the residual value A _REST of the processing capacity, yet good as to calculate the estimated residual pure water collection amount was divided by the electric conductivity of the raw water.

Note that the introduction of raw water to pure water instrument, which had lines by quantitative, the estimated remaining pure water collection amount, the by dividing the amount of introduced dose was calculated estimated remaining number of uses, further, the pure the introduction of raw water to water unit, have rows for each predetermined operating time of the co-compressors, and the remaining number of times of processing, the product of the predetermined time, estimated remaining life of up to replacing the pure water device or ion-exchange resins Evaluated as time (expected remaining operating time) .

A water circulation type compressor equipped with an apparatus for evaluating the remaining treatment capacity of an ion exchange type deionizer according to the present invention for realizing the above method is as follows:
Compressed air having a compressor body that compresses compressed air together with circulating water, communicated with a discharge port of the compressor body via a discharge circuit, and discharged from the compressor body as a gas-liquid mixed fluid with circulating water A separator receiver tank is provided, and a return circuit is provided for introducing the circulating water separated from the compressed air in the separator receiver tank into a water supply port of the compressor body, and is provided between the compressor body and the separator receiver tank. In a water circulation compressor that forms a circulation system of circulating water,
A water supply circuit for introducing water supplied from an external water supply source into the circulation system of the circulation water via a deionizer to replenish and replace the circulation water in the circulation system, and in the separator receiver tank A drainage circuit configured to discharge the circulating water of
On the primary side of the deionizer 45, the electrical conductivity of the raw water is measured, for example, an electrical conductivity measuring means 61 such as an electrical conductivity meter or a resistance meter;
Measuring means 62 such as a flow meter for measuring the amount of the raw water passing through the deionizer 45;
It is realized by an electronic control unit or the like that calculates the remaining treatment capacity of the pure water device based on the electric conductivity measured by the electric conductivity measuring means 61 and the passing amount measured by the measuring means 62. A calculation means 70;
Display means 80 for displaying the result of calculation by the calculation means 70;
The calculating means 70 is
The water having a predetermined electrical conductivity is standard water, and when this standard water is treated, the total pure water sampling amount (standard total pure water sampling amount) in the pure water device and the standard water electrical conductivity Having storage means for storing
When the raw water is introduced, a processing capacity decrease value calculating means for calculating a product of the electrical conductivity of the raw water measured by the electrical conductivity measuring means 61 and the measuring means 62 and the passing amount as a processing capacity decreasing value A _LOSS. When,
Wherein the total capacity value A _ALL standard total net water collection amount and the the product of electric conductivity of the standard water pure water device 45, by subtracting the capacity reduction value A _LOSS from the aggregate capacity value A _ALL the calculated processing capacity remaining values a _REST pure water device 45, have a capacity remaining value calculation means, the estimated residual pure water collection amount by dividing the capacity remaining value in the electric conductivity of the raw water A means for calculating the expected remaining pure water sampling amount to be calculated;
Quantitative passage of raw water to the water purifier is performed, and the estimated remaining usage count is calculated by dividing the estimated remaining pure water sampling amount obtained each time by the amount of raw water passed for each time. Establishing the expected remaining usage count calculation means,
Expected remaining usage time is calculated by performing passage of raw water to the deionizer every fixed operation time of the compressor, and calculating the expected remaining usage time by adding the expected remaining treatment count and the constant operation time to the calculating means. Provide a calculation means,
The expected remaining usage time calculated by the expected remaining usage time calculation means is displayed on the display means (claim 1 ).

In the evaluation apparatus having the above configuration, the processing capacity decrease value calculation means measures the electric conductivity and the passing amount of the raw water every time the raw water passes through the deionizer 45, and each time the processing is performed. While calculating the ability reduction value,
The processing capacity remaining value calculating means may be configured to add up the processing capacity decrease values due to the passage of the raw water from the first time to the latest time and to subtract from the total processing capacity value (Claim 2 ). .

Further, the calculating means 70 includes an average value calculating means for obtaining a measurement result by the electric conductivity measuring means at the time of passage of the raw water every time and calculating an average value,
The capacity reduction value calculating means may be configured to calculate the reduced value of the capacity on the basis of the average value of the electrical conductivity the average value calculation means has calculated (Claim 3).

With the configuration of the present invention described above, according to the water circulation compressor of the present invention, the remaining treatment capacity of the pure water device 45 can be evaluated as a numerical value (residual treatment capacity value A _REST ) regardless of the quality of raw water. Based on this value, it became possible to predict the replacement time of the deionizer or ion exchange resin in advance.

By calculating the processing capacity decrease value A _LOSS for each passage of the feed water to the deionizer 45 and adding the processing capacity decrease values from the first to the latest time and subtracting it from the total processing capacity value A _ALL The remaining treatment capacity of the deionizer 45, which decreases each time the supply water is introduced, can be confirmed, and the replacement time and the like can be easily grasped.

  In addition, when the electrical conductivity of raw water is measured in several batches and the residual treatment capacity is evaluated using the average value of the measured electrical conductivity, raw water with unstable electrical conductivity is treated. Even in this case, it was possible to accurately evaluate the remaining processing capacity.

Furthermore, based on the remaining processing capacity value A _REST , by calculating the expected values such as the amount of remaining pure water collected, the number of remaining uses, and the remaining use time (operating time), it is possible to obtain pure water as a more specific value. The remaining processing capacity of the vessel could be determined.

  Next, embodiments of the present invention will be described below with reference to the accompanying drawings.

[Basic configuration]
1. Assumptions In the present invention, the pure water device whose remaining capacity is to be evaluated is an ion exchange type pure water device in which a container constituting the pure water device is filled with an ion exchange resin. When the feed water is passed, the ion exchange resin removes impurities such as metal ions contained in the raw water by an ion exchange reaction.

  Accordingly, when the ion exchange resin reaches saturation, the ion exchange reaction is not performed, and the total amount of impurities that can be removed by the ion exchange resin is determined by the saturation amount of the ion exchange resin filled in the pure water device.

  On the other hand, the more electrolyte the water contains, the easier it is to conduct electricity and the electrical conductivity increases. Therefore, by measuring the electrical conductivity of water, it is possible to estimate the amount of impurities such as electrolyte dissolved in the water, that is, metal ions.

  Based on the above assumptions, the electrical conductivity of the water to be treated (raw water) in the pure water device and the pure water that can be collected in this pure water device (in this case, those with an electrical conductivity of 1 μS / cm or less Observing a correlation graph (see Fig. 1) showing the total amount of water (defined as "water"), not only is the relationship between the total collected amount of pure water decreasing as the electrical conductivity of the raw water to be treated increases, Examining in detail the relationship between the electrical conductivity shown in the graph and the amount of pure water collected, for example, when raw water with an electrical conductivity of 100 (μS / cm) was treated, the pure water sample was 4000 (L). When the electric conductivity of the raw water is 200 (μS / cm), which is double, it is 2000 (L), which is 1/2, and when it is 400 (μS / cm), which is four times, it is 1000 (1/4). It can be seen that there is a relationship of decreasing to (L).

  That is, when the electrical conductivity of raw water is doubled or quadrupled, the amount of pure water collected is 1/2, 1/4, and the ratio of electrical conductivity is the amount of impurities contained in the raw water. We focused on the fact that the ratio is expressed almost exactly as it is.

  Such a correlation between the electrical conductivity of the raw water and the amount of pure water collected is a phenomenon that can be seen in other ion exchange type pure water devices as well.

  Therefore, in the present invention, the electrical conductivity of water is assumed to be the amount of impurities contained per unit volume of water, and the product of the electrical conductivity and the volume of water is calculated as the amount of impurities contained in the volume of water. The starting point is assumed to be the total amount.

2. Based on the above assumptions, the total amount of impurities (saturation) that can be removed before a certain water purifier reaches saturation is the amount of water (standard water) with a predetermined electrical conductivity. Can be quantified as a value (total treatment capacity value A _ALL ) obtained by the product of the amount of pure water collected when the water is treated and the electric conductivity of the standard water.

As an example, the pure water device shown in the graph of FIG. 1 will be described as an example. If water with an electrical conductivity of 100 (μS / cm) is standard water, pure water sampling when this standard water is treated Since the amount is 4000 (L), the total capacity value A _ALL of this water purifier is
Total processing capacity A _ALL = 100 (μS / cm) × 4000 (L) = 400000
It becomes.

This total treatment capacity value A _ALL is the same even if the water purifier is the same, for example, when water with electrical conductivity of 200 (μS / cm) or 400 (μS / cm) is used as standard water.
Total processing capacity A _ALL = 200 (μS / cm) × 2000 (L) = 400000
Total processing capacity A _ALL = 400 (μS / cm) × 1000 (L) = 400000
This indicates that the total amount of impurities that can be removed is substantially constant regardless of the electrical conductivity of the raw water to be treated. From this, the electric conductivity of the standard water for _{obtaining the} total processing capacity value A _ALL can take an arbitrary value.

Therefore, for example, the specification of the water purifier published by the water purifier manufacturer, for example, the amount of pure water displayed in the catalog, etc., and the quality of the raw water (electrical conductivity) used as the calculation standard for this amount of pure water are found. In this case, the pure water sampling amount shown here and the electric conductivity of the raw water as the calculation standard are calculated based on the electric conductivity of the standard water, and the total processing capacity value A _ALL can be quantified.

3. Quantification of processing capacity lost due to the passage of raw water The amount of impurities contained in the raw water passing through the water purifier is the amount L (measured value) of the raw water passing through the water purifier and the primary water purifier. It can be quantified as the product of the raw water electrical conductivity S (measured value) on the side.

  Assuming that the impurities in the raw water are removed by the ion exchange resin when passing through the deionizer, the remaining amount of impurities that can be removed by the deionizer decreases by the amount of the removed impurities.

Therefore, by treating the feed water with the product of the amount L (measured value) of raw water that has passed through the deionizer and the electrical conductivity S (measured value) of the raw water on the primary side of the deionizer, It can be quantified as the processing capacity decrease value A _LOSS of the water purifier.

Then, if the processing capacity decrease value A _LOSS is subtracted from the total processing capacity value A _{ALL of} the pure water device, the remaining processing capacity value (processing capacity remaining value A _REST ) of the pure water system is calculated as a numerical value. be able to.

As an example,
Electrical conductivity S = 200 (μS / cm)
Passage L = 26.8 (L)
Assuming that the raw water is passed, the treatment capacity reduction value A _LOSS of the pure water device at this time is
Processing capacity reduction value A _LOSS = S × L = 200 (μS / cm) × 26.8 (L) = 5360
It becomes.

Therefore, the treatment capacity remaining value A _REST of the pure water device after the supply water passes is
Processing capacity remaining value A _REST = A _ALL -A _LOSS = 400000-5360 = 394640
Thus, the remaining processing capacity of the deionizer can be quantified.

The processing capacity remaining value A _REST obtained here is displayed as it is or processed and displayed on the display device, so that the remaining processing capacity of the current pure water device can be confirmed, and the replacement time of the pure water device can be confirmed accordingly. Etc. can be predicted.

[Additional elements]
In the present invention, on the premise of the basic configuration, in order to accurately display the remaining treatment capacity of the deionizer, and in consideration of the case where the deionizer is provided, for example, in the water circulation compressor described above, The configuration can be added.

1. Configuration for improving the accuracy of the processing capacity remaining value A _{REST In} addition to the basic configuration, in order to make the remaining value to be evaluated more accurate, when the raw water is introduced into the deionizer 45, The above-described measurement of the electric conductivity of the raw water is performed a plurality of times every predetermined time, and the treatment capacity reduction value A _LOSS is calculated by using the average value of the electric conductivity measured here as the electric conductivity S of the feed water. Configure.

  Thereby, even if it is a case where the supply water whose electrical conductivity is not stabilized is made into a treating object, the error at the time of evaluation can be reduced.

2. Renewal of processing capacity remaining value A _{REST As} an example, in the above-mentioned water circulation type compressor, water supply is performed because the raw water is intermittently passed through the pure water device, such as periodically introducing the supply water to the circulation system. It is necessary to update the remaining processing capacity value A _REST every time it is read.

  Specifically, every time feed water is introduced, the amount of feed water passing is measured, and the processing capacity decrease values from the first to the latest are added together and subtracted from the total processing capacity value.

3. Calculation of expected remaining pure water sampling amount This configuration is to determine how much pure water can be collected based on the remaining processing capacity value A _{REST of the} water purifier.
Expected residual pure water sampling amount = residual value of processing capacity A _REST / calculated by electric conductivity of raw water.

4). Expected remaining usage count This configuration is used in the case where, for example, in a water circulation type compressor equipped with a pure water device, when the amount of water supply for one time is determined in advance, the remaining water treatment capacity value of the pure water device is used several times. To calculate the expected number of times it can be done,
Estimated remaining number of uses = Expected remaining pure water sampling amount / feed water introduction amount for one time.

5). Calculation of expected remaining operation time In this configuration, for example, in a water circulation type compressor provided with a deionizer, the water supply amount for one supply water is determined in advance, and the time until the next water supply is, for example, the operation time. The number of hours that the water purifier can be used with respect to the remaining capacity of the water purifier is calculated.
Estimated remaining operation time = estimated remaining use count × time until water exchange.

〔Device configuration〕
Next, a configuration example of the evaluation apparatus of the present invention for realizing the above method will be described below.

  In the following embodiments, the evaluation device of the present invention will be described as being used for evaluating the remaining treatment capacity of a deionizer provided in a water circulation compressor. It can be used widely and generally for the evaluation of the remaining treatment capacity of pure water devices used in various applications and devices that require water supply, and the application of the present invention is not limited to the examples shown in the embodiments. .

1. 2 is a water circulation compressor. The water circulation compressor includes a compressor body 10 for compressing compressed air together with circulating water, and a discharge port 11 of the compressor body 10. And a separator receiver tank 20 for introducing compressed air discharged from the compressor body 10 as a gas-liquid mixed fluid with circulating water.

  Further, the separator receiver tank 20 is provided with a return circuit 32 for introducing the circulating water separated from the compressed air in the separator receiver tank 20 into the water supply port 12 of the compressor main body 10. A circulating system for circulating water is formed between the main body 10 and the separator receiver tank 20.

  In FIG. 2, reference numeral 41 shown in the return circuit 32 is a radiator, and reference numeral 42 is a water filter, which cools and circulates the circulating water in the separator receiver tank 20 and supplies it to the water supply port of the compressor body 10. 12 is introduced.

  In the water circulation type compressor 1 configured as described above, a water supply circuit for introducing supply water from an external water supply source into the circulation system of the circulation water in order to replenish and replace the circulation water to the circulation system. 50 (51, 52, 53) are provided.

  In the present embodiment, the water supply circuit 50 includes an introduction part 51 communicated with an external water supply source such as a water supply via an on-off valve 43 and two circuits 52 and 53 branched from the introduction part 51. One of the branches is connected to the intake side of the compressor body 10 to form a water supply circuit 52 for replenishing water, and the other is connected to the separator receiver tank 20 to form a tank water supply circuit 53.

  Then, in the water supply circuit (introduction section 51) from the external water supply source to the branch point, the water filter 44 and the deionizer 45 are arranged in this order from the upstream side. The water supply circuit 53 is provided with electromagnetic on-off valves 46 and 47 for opening and closing the circuits.

  In FIG. 2, reference numeral 48 denotes a check valve provided in the replacement water supply circuit 53, which prevents circulating water from flowing back and compressed air from flowing out due to the pressure in the separator receiver tank 20.

  Reference numeral 33 denotes a drain circuit, which is configured to be able to drain the circulating water in the separator receiver tank 20 by opening the drain circuit 33 by an electromagnetic on-off valve 49.

  In the water circulation compressor 1 configured as described above, the tank water supply circuit 53 is used when supplying the circulating water directly into the separator receiver tank 20, and as an example, when the start switch of the compressor 1 is turned ON. When the water level in the separator receiver tank 20 is below a predetermined level, the electromagnetic on-off valve 47 opens the tank water supply circuit 53, and the water supplied from the external water supply source is filtered by the water filter 44 and purified water. After passing through the vessel 45, the water is purified and introduced into the separator receiver tank 20.

  The replenishment water supply circuit 52 is a circuit for supplying water into the circulation system via the compressor body 10 when the compressor 1 is in operation. For example, when the compressor 1 is operated for a predetermined time, Used when changing circulating water. For example, when the compressor 1 is operated for a predetermined time, the electromagnetic on-off valve 49 opens the drain circuit 33, discharges a predetermined amount of circulating water in the circulation system, and then closes the drain circuit 33. Thereafter, the electromagnetic on / off valve 46 is opened, and pure water that has passed through the deionizer 45 through the water supply circuit 52 for replenishing water is introduced into the circulation system through the compressor body 10, and this operation is repeated several times. Bring the circulating water in the circulation system closer to pure water.

2. Configuration of Residual Capacity Evaluation Device In the water circulation compressor configured as described above, the evaluation device of the present invention is the primary water purifier 45 provided in the introduction part 51 of the water supply circuit 50 as shown in FIG. The electrical conductivity measuring means 61 for measuring the electrical conductivity of the raw water (feed water) on the side, the measuring means 62 for measuring the amount of raw water that has passed through the deionizer 45, and the electrical conductivity measuring means 61 On the basis of the electrical conductivity and the amount of raw water measured by the metering means 62, the calculating means 70 for calculating the remaining treatment capacity of the deionizer 45, and the calculation result by the calculating means 70, Display means 80 such as a liquid crystal display panel for displaying the remaining processing capacity is provided.

(1) Electrical conductivity measurement means As the electrical conductivity measurement means 61 described above, a known electrical conductivity meter can be used, and the electrical conductivity is the reciprocal of the resistivity. Instead of the conductivity meter, a resistance meter may be provided to measure the electrical conductivity (resistivity) of the supplied water.

(2) Raw water passing amount measuring means As the measuring means 62 for measuring the raw water amount that has passed through the deionizer 45, any configuration may be adopted as long as the flow rate of the supplied water can be measured. In this embodiment, a flow meter is provided in the water supply circuit 50 on the secondary side of the deionizer 45, and the flow rate of the feed water that has passed through the deionizer is measured by this flow meter. .

  However, the present invention is not limited to the embodiment shown in FIG. 3, and the flow meter may be provided on the primary side of the deionizer 45, and for example, a level switch is provided in the separator receiver tank 20 (see FIG. 2). This may be used as the metering means 62, and the increase in the circulating water due to the supply water being introduced into the circulation system via the water supply circuit 50 is detected and measured by the metering means 62 that is this level switch. You may do it.

(3) Calculation means The calculation means 70 described above follows a preset program based on the electrical conductivity S and raw water passage amount L received as electrical signals from the electrical conductivity measuring means 61 and the measuring means 62. Is a processing device that calculates the remaining processing capacity of the deionizer 45 as a numerical value (residual processing capacity value A _REST ) and displays the calculation result on a display device 80 to be described later. It is realized by the device.

  The calculation means 70 realizes each means for performing the following processes by executing a preset program (see FIG. 4).

  In the above-described calculation means 70, as an initial setting, for example, based on the specifications of the deionizer 45, the standard pure water collection amount (L) of the deionizer 45, and the standard pure water collection amount Enter the electrical conductivity (μS / cm) of the raw water (standard water) that is the calculation standard, and store it.

  In addition, when the water supply amount for one supply water to the circulating system of the circulating water compressor 1 is determined in advance, the water supply amount (L) for this one time is stored and such raw water is stored. When the water circulation compressor is configured to be introduced at predetermined operating times, the operating time (h) until the introduction is input by operating an operation key (not shown) or a touch panel. , Stored in the storage means of the calculation means 70.

  In FIG. 4, the electric conductivity of the raw water on the primary side of the deionizer 45 measured by the electric conductivity measuring means 61 is input to the calculating means 70 as an electric signal, and the average electric conductivity is averaged by the average value calculating means. A value is calculated.

  This average value calculation means receives the electrical conductivity at every predetermined time (Δt) preset in the timer during the introduction of the raw water every time, and temporarily stores each received electrical conductivity, The average value of conductivity is calculated.

The average value of the electrical conductivity calculated in this way is integrated with the amount of raw water (L) measured by the measuring means 62 and passed through the water purifier by the processing capacity decrease value calculating means. A water processing capacity reduction value A _LOSS is calculated.

  The processing capacity decrease value calculation means measures the electrical conductivity and the passing amount of the raw water every time the raw water passes through the deionizer, and calculates the processing capacity decrease value each time. To do.

In this way, the calculated processing capacity decrease value A _LOSS is calculated by the processing capacity remaining value calculation means between the standard pure water sampling amount of the pure water apparatus and the electric conductivity of the standard water set by the initial setting. The remaining processing capacity of the pure water device is calculated as a numerical value (residual processing capacity value A _REST ) by subtracting from the total processing capacity value A _ALL obtained as a product.

In addition, when the introduction of the raw water into the deionizer 45 is after the second time, the processing capacity decrease values calculated for each time are added together and subtracted from the total processing capacity value A _ALL .

Based on the remaining processing capacity value A _REST calculated in this way, the expected remaining pure water sampling amount calculating means is represented by the following equation:
Expected remaining pure water sampling amount = residual processing capacity value A _REST / Estimated amount of pure water that can be collected thereafter by the deionizer 45 based on the electrical conductivity of the raw water is calculated as the expected remaining pure water sampling amount. Display on the display means 80.

In addition, in the above-described initial setting, when the introduction amount of one supply water is set, the expected remaining usage number calculating means is expressed by the following equation:
Expected remaining usage count = expected pure water sampling amount / based on the amount of supplied water, the expected remaining usage count is calculated and displayed on the display means described later.

Furthermore, in the above-described initial setting, when a certain amount of supply water is introduced every certain operation time of the compressor, the expected operation time calculating means is given by the following equation:
Estimated remaining operating time = estimated remaining usage count × operating time until introduction of feed water is calculated, and the expected remaining operating time is calculated and displayed on the display means described later.

(4) Display means As described above, the remaining treatment capacity of the deionizer 45 calculated by the calculation means 70 is transmitted to the display means 80 and displayed.

The display means 80 is displayed by increasing or decreasing the number of LEDs to be lit according to the ratio of the remaining processing capacity value A _REST to the total processing capacity value A _ALL by arranging a plurality of LEDs on a straight line, for example. However, in this embodiment, as shown in FIG. 5, as an example, as shown in FIG. 5, the expected remaining pure water sampling amount, the expected remaining number of uses, the expected All remaining operating hours can be displayed, and a display location corresponding to each display item is provided.

  In the present embodiment, these numerical values can be displayed on a touch panel provided for performing various settings, display, and the like of the compressor, and predetermined values on the touch panel are displayed according to the guidance displayed on the screen. By touching the position, various numerical values relating to the remaining treatment capacity of the deionizer 45 are displayed.

  By providing such display means 80, the operator can accurately predict the replacement time of the pure water device itself or the ion exchange resin cartridge of the pure water device.

  An example in which the remaining treatment capacity of the pure water device provided in the water circulation compressor is determined by the method of the present invention described above will be described below.

1. Pure water device A pure water device that can collect 2000 (L) of pure water of 1 (μ / cm) or less when water with an electric conductivity of 200 (μ / cm) is used as standard water.

Therefore, the total processing capacity value A _ALL of the pure water device is
Total processing capacity value A _ALL = 200 (μ / cm) x 2000 (L) = 400000
It is.

2. Compressor setting The water circulation type compressor equipped with the above deionizer is set so that the circulating water is exchanged every time the compressor 100 (h) is operated. , 26.8 (L).

3. Determination Method The following table shows the results obtained by using the method of the present invention to determine the remaining treatment capacity that decreases with use of the pure water device provided in the water circulation compressor as a determination target.

Correlation graph of electrical conductivity of treated water (raw water) -pure water sampling amount. The whole block diagram of a water circulation type compressor. The schematic block diagram of a residual processing capacity evaluation apparatus. The functional block diagram of a calculation means. Explanatory drawing which shows the example of a display in a display means. Pure water sampling amount-pure water electrical conductivity correlation graph.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water circulation type compressor 10 Compressor body 11 Discharge port 12 Water supply port 20 Separator receiver tank 31 Discharge circuit 32 Return circuit 33 Drain circuit 41 Radiator 42, 44 Water filter 43 On-off valve 45 Pure water device 46, 47, 49 Electromagnetic on-off valve 48 Check valve 50 Water supply circuit 51 Introduction part (of water supply circuit 50)
52 Water supply circuit for replenishment 53 Water supply circuit for replacement 61 Electric conductivity measuring means (electric conductivity meter)
62 Measuring means 70 Calculation means 80 Display means

Claims (3)

Compressed air having a compressor body that compresses compressed air together with circulating water, communicated with a discharge port of the compressor body via a discharge circuit, and discharged from the compressor body as a gas-liquid mixed fluid with circulating water A separator receiver tank is provided, and a return circuit is provided for introducing the circulating water separated from the compressed air in the separator receiver tank into a water supply port of the compressor body, and is provided between the compressor body and the separator receiver tank. In a water circulation compressor that forms a circulation system of circulating water,
A water supply circuit for introducing water supplied from an external water supply source into the circulation system of the circulation water via a deionizer to replenish and replace the circulation water in the circulation system, and in the separator receiver tank A drainage circuit configured to discharge the circulating water of
In the primary side of the pure water device, the electric conductivity measuring means for measuring the electrical conductivity of the raw water,
A measuring means for measuring a passing amount of the raw water with respect to the pure water device;
And electric conductivity measured by the electric conductivity measuring means, a calculating means on the basis of the passage of the raw water that is measured by the weighing means, calculating the remaining capacity of the pure water device,
Display means for displaying the result of calculation by the calculation means;
The calculating means is
Water having a predetermined electrical conductivity is standard water, and storage means for storing the total amount of pure water collected in the pure water device and the electrical conductivity of the standard water when the standard water is treated. ,
A processing capacity decrease value calculating means for calculating, as a processing capacity decrease value, a product of the electrical conductivity of the raw water measured by the electrical conductivity measuring means and the metering means and a passing amount when the raw water is introduced;
The product of the total pure water sampling amount and the electric conductivity of standard water is used as the total processing capacity value of the pure water device, and the processing capacity reduction value is subtracted from the total processing capacity value to obtain the processing capacity of the pure water device. calculating a residual value, have a capacity remaining value calculation means calculates the estimated residual pure water collection amount by dividing the capacity remaining value in the electric conductivity of the raw water, estimated remaining pure water collection amount calculating means With
Quantitative passage of raw water to the water purifier is performed, and the estimated remaining usage count is calculated by dividing the estimated remaining pure water sampling amount obtained each time by the amount of raw water passed for each time. Establishing the expected remaining usage count calculation means,
Expected remaining usage time is calculated by performing the passage of raw water to the deionizer every fixed operation time of the compressor, and calculating the expected remaining usage time by adding the expected remaining treatment count and the constant operation time to the calculating means. Provide a calculation means,
A water circulation type compressor equipped with a remaining capacity evaluation device for an ion-exchange-type water purifier , wherein the expected remaining usage time calculated by the expected remaining usage time calculation means is displayed on the display means . The processing capacity decrease value calculating means measures the electrical conductivity and the passing amount of the raw water every time the raw water passes through the deionizer, calculates the processing capacity decrease value each time, and
2. The ion exchange according to claim 1, wherein the processing capacity remaining value calculating means adds up the processing capacity decrease values due to the passage of raw water from the first time to the latest time, and subtracts the total processing capacity value from the total processing capacity value. A water circulation type compressor equipped with a device for evaluating the remaining treatment capacity of a water purifier. The calculating means includes an average value calculating means for obtaining a measurement result by the electric conductivity measuring means at the time of passage of the raw water every time and calculating an average value,
3. The ion exchange according to claim 1, wherein the processing capacity decrease value calculation unit calculates the decrease value of the processing capacity based on the average value of the electrical conductivity calculated by the average value calculation unit. A water circulation type compressor equipped with a device for evaluating the remaining treatment capacity of a water purifier.

Images