KR100191863B1 - Method of control for water cleaner - Google Patents

Abstract

The present invention installs a water quality sensor in front of the pretreatment filter to block the inflow of contaminated water at the source, and to install a timer for recycling the concentrated water drained from the membrane filter and controlling the recycle time according to the quality of the raw water. Reverse osmosis water purification device and a control method for protecting the filter by filtering the raw water through a multi-stage pre-treatment filter, membrane filter, post-treatment filter to store the water in the reservoir tank and to re-filter the concentrated water drained In the reverse osmosis water purification device to circulate, the water quality sensor is installed in front of the pretreatment filter to block the contaminated water at the source, provide an auxiliary reservoir between the all carbon filter and the membrane filter, and operate the recycled concentrated water by the set time. Due to the characteristics of the membrane A significant reduction in raw water can be expected while effectively reusing large amounts of concentrated water. Especially, the filter replacement can be prevented by preventing a large number of filter damages caused by a large amount of contaminated water generated after reuse of raw water. There is an advantage in using that can reduce the cost.

Description

Reverse osmosis water purification device and its control method

The present invention relates to a reverse osmosis water purification device and a control method thereof.

Today, with the rapid development of the industry, environmental pollution has become serious and water purifiers have been developed that are not suitable for drinking natural water as it is, so that the water can be purified easily.

The water purifier is commercially available using various water purifying methods, but the water purifying method is the best water purifier because the reverse osmosis water purifier is used because it filters out various bacteria and heavy metals by a membrane filter having fine pores.

1 is a schematic structural diagram showing an embodiment of a conventional water purifying apparatus.

The raw water is introduced into the pretreatment filter 10 under the control of the flow rate control device 11 for preventing the difference in flow rate depending on the region through the solenoid valve 16 controlling the inflow of the filter.

The pretreatment filter 10 serves to remove various sediments and suspended matter such as dust, debris from raw water, and the filtered raw water passes through the pre-carbon filter 20.

The pre-carbon filter 20 serves to remove organic chemicals that people should not consume, such as carcinogens, synthetic detergents, pesticides, residual chlorine, as well as remove bad taste and smell. The water through the all carbon filter 20 is passed through the membrane filter 30 having a fine reverse osmosis pressure of 0.0001um, where the heavy metals such as lead and arsenic, salts such as sodium, various organic materials, Organic substances such as bacteria, viruses and radioactive materials are removed as well as bacteria.

Therefore, in order to pass through such fine pores, it is not possible to perform smooth filtration through a pressure by simple hydraulic pressure, so that a boosting pump 32 is installed at the front end of the membrane filter 30 to smoothly pass through the membrane filter 30.

Thereafter, the water is passed through the fucarbon filter 40 located at the rear end of the membrane filter 30 so as to be drinking to the water reservoir 50.

2 is a schematic view showing another embodiment of a conventional reverse osmosis water purification device. The system will be described below.

A pretreatment filter unit 10 'filled with a filter sand for removing large particulate matter such as iron rust and turbidity from the tap water flowing through the feed hose; An activated carbon adsorption filter unit 20 'filled with activated carbon for adsorption and removal of components causing odor and organic matter, phenol, detergent, etc. in the water passing through the pretreatment filter unit 10'; A reverse osmosis membrane filter unit 30 'having a reverse osmosis membrane in order to remove harmful heavy metals, inorganic ions and harmful bacteria in water; A pressure pump 32 operable to pass through the reverse osmosis membrane of the reverse osmosis membrane filter portion 30 '; A hydrostatic pressure storage tank 50 'for storing purified water passing through the reverse osmosis membrane; A post-treatment filter part 40 'filled with activated carbon for removing a odor of rubber generated from a rubber tube inside the hydrostatic pressure storage tank 50'; A sterilization unit (41) having a built-in ultraviolet lamp for sterilizing bacteria propagated in activated carbon of the post-treatment filter unit (40 '); A discharge cock 42 which operates mechanically; A concentrated water storage tank 43 for storing the concentrated water passing through the reverse osmosis membrane filter part 30 '; A water quality sensor 44 for detecting the water quality of the brine flowing into the brine storage tank 43; A concentrated water drain valve (45) for draining the concentrated water when the water quality is sensed by the water quality sensor (44) or more; Sensors 46 and 46 'for detecting the full water level and the low water level in the brine storage tank 45; It is installed between the activated carbon adsorption filter unit 20 'and the pressure pump 32' and consists of tap water / condensed water feed valves 47 and 47 'that are electrically operated when the storage water is pumped.

However, in the former case of the conventional water purification device, when the concentrated water is generated due to the structure of the membrane filter (reverse osmosis membrane filter unit), water is drained to maintain the performance of the membrane. There was a problem of wasting about three times the amount compared to the amount.

In addition, in the latter case of the conventional water purification device, even if the raw water contaminated by the pretreatment filter unit and the activated carbon adsorption filter unit flows in from the raw water, there is no means for restraining it, which shortens the life of the filter due to the contamination of the filter units. On the other hand, the raw water is filtered out of the reverse osmosis membrane filter unit, and the remaining concentrated water is drained and collected in the concentrated water storage tank, and the concentrated water is re-introduced into the reverse osmosis membrane filter unit and then filtered again. Because of the method, the excessive oscillation of the reverse osmosis membrane filter part is easily contaminated, which causes a problem that does not play a desirable role of the water purifier, and raises a serious problem that may act as a very harmful element for human body to drink contaminated water.

Therefore, the present invention has been made to solve the above problems, the raw water is filtered through a multi-stage pre-treatment filter, membrane filter, post-treatment filter to store the water in the storage tank, and to circulate the drained concentrated water refiltered A reverse osmosis water purification device, comprising: a water quality sensor installed at a front end of a pretreatment filter to detect a pollution concentration of raw water and to block inflow of raw water according to a contamination state of concentrated water; A first drain valve branched between the water quality sensor and the pretreatment filter and configured to drain according to the pollution concentration of the raw water; A solenoid valve disposed between the primary drain valve and the pretreatment filter and configured to open / close the water channel by an electric operation according to the pollution concentration and the water level of the auxiliary reservoir tank and the reservoir tank; An auxiliary reservoir installed between the all-carbon filter and the membrane filter to pump water from the all-carbon filter to the membrane filter and to receive the drained water of the membrane filter; A secondary drain valve connected to a lower portion of the auxiliary reservoir and configured to drain according to a contamination state of the concentrated water; A timer for setting a time of the maximum pollution value of the concentrated water circulated in the auxiliary reservoir and opening the secondary drain valve when the time expires; Detect the contamination concentration from the water quality sensor, close the solenoid valve, open the primary drain valve, pump the membrane water when the auxiliary reservoir is full, and secondary when the timer expires. And a control unit for draining the concentrated water through the drain valve.

The present invention also provides a reverse osmosis water purification control method for filtering raw water through a multi-stage pretreatment filtration filter, a membrane filter, and a post-treatment filter to store the raw water in a reservoir and circulate the drained concentrated water to be refiltered. If the pollutant concentration detected from the water quality sensor 12 is higher than the set concentration, the solenoid valve 16 is closed and the primary drain valve 14 is opened. If it is lower than the set concentration, the solenoid valve 16 Opening and storing raw water in the auxiliary reservoir 60 through the pretreatment filter 10 and the precarbon filter 20; When the water level of the auxiliary reservoir 60 is detected, the timer 70 is operated and the solenoid valve 16, the primary drain valve 14, and the secondary drain valve 62 are closed, and the water supply valve ( 66) and the boosting pump 64 are turned on to flow into the reservoir 50 through the membrane filter 30 and the fucarbon peter 40, and the concentrated water drained from the membrane filter 30 is transferred to the auxiliary reservoir 60. Circulating until re-introduced and low water level detected; When the water level of the reservoir 50 is detected, the boosting pump 64 and the water supply valve 66 are turned off, and the primary drain valve 14 and the secondary drain valve 62 are closed. Continuing to flow in;

When the counting timer 70 expires as much as the set time of the maximum contamination level of the auxiliary reservoir 60 by the concentrated water, the solenoid valve 16, the boosting pump 64 is turned off, and the water supply valve 66 and the primary drainage Closing the valve 14 and opening the secondary drain valve 62 to drain the concentrated water; It has a constant control method of.

1 is a schematic structural diagram showing an embodiment of a conventional water purifier.

2 is a schematic structural diagram showing another embodiment of the conventional water purifier.

3 is a schematic structural diagram showing a reverse osmosis water purification device according to the present invention.

4 is a control flowchart of the reverse osmosis water purification device according to the present invention.

* Explanation of symbols for main parts of the drawings

10: pretreatment filter 12: water quality sensor

14: primary drain valve 16: solenoid valve

20: all carbon filter 22, 22-1: flow rate control valve

30 membrane filter 40 carbon filter

50: reservoir 60: auxiliary reservoir

61: water level sensor 62: secondary drain valve

64: boosting pump 66: water supply valve

70: timer 80: control unit

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail based on attached drawing.

3 is a schematic structural diagram showing a reverse osmosis water purification apparatus according to the present invention, which filters raw water through a multi-stage pretreatment filtration filter, a membrane filter, and a post-treatment filter to store raw water in a storage tank and to drain the concentrated water that is drained. A reverse osmosis water purification device for circulating filtered, comprising: a water quality sensor (12) installed at a front end of a pretreatment filter (10) to detect a contamination concentration of raw water and to block inflow of contaminated water at its source; A primary drain valve 14 which is installed between the water quality sensor 12 and the pretreatment filter 10 and drains according to the pollution concentration of raw water; A solenoid valve (16) installed between the primary drain valve (14) and the pretreatment filter (10), the opening and closing of the water channel by an electric operation according to the pollution concentration state; It is installed between the all carbon filter 20 and the membrane filter 30 to pump the water from the all carbon filter 20 to transmit and receive to the membrane filter 30, while the water drained from the membrane filter 30 Receiving auxiliary reservoir 60; A secondary drain valve 62 connected to a lower portion of the auxiliary reservoir 60 and configured to drain according to a contamination state of the concentrated water; A timer (70) for setting a time of the maximum pollution value of the concentrated water circulated in the auxiliary reservoir (60) and opening the secondary drain valve (62) when the time expires; The contamination concentration from the water quality sensor 12 is detected, the solenoid valve 16 is closed, and the primary drain valve 14 is opened, and the membrane filter 30 when the auxiliary reservoir 60 is full. It is to include a control unit 80 to pump the water to the water, and to drain the concentrated water through the secondary drain valve 62 when the timer 70 expires.

Further, between the all carbon filter 20 and the auxiliary reservoir 60, and between the auxiliary reservoir 60 and the membrane filter 30, respectively, the flow rate control valve 22 to adjust the flow rate of the incoming water ( 22-1) was installed.

Each of the flow rate control valves 22 and 22-1 introduced into the auxiliary reservoir 60 is preferably set at an inflow ratio of 1: 3.

In addition, it is to install a water level sensor 61 to detect the upper and lower limit of the concentrated water on one side of the auxiliary reservoir (60).

In addition, a water supply valve 66 is provided between the boosting pump 64 and the membrane filter 30 to electrically control the pumped water of the auxiliary reservoir 60.

On the other hand, the present invention is a control method according to this configuration, the reverse osmosis pressure to filter the raw water through a multi-stage pre-treatment filter, membrane filter, post-treatment filter to store in the reservoir, and to circulate the drained concentrated water to be refiltered In the water purification control method, if the pollution concentration value detected from the water quality sensor 12 is higher than the set concentration, the solenoid valve 16 is closed and the primary drain valve 14 is opened. Lowering the solenoid valve 16 to store raw water through the pretreatment filter 10 and the pre-carbon filter 20 and into the auxiliary reservoir 60; When the water level of the auxiliary reservoir 60 is detected, the timer 70 is operated and the solenoid valve 16, the primary drain valve 14, and the secondary drain valve 62 are closed, and the water supply valve ( 66) and the boosting pump 64 are turned on to flow into the reservoir 50 through the membrane filter 30 and the fucarbon filter 40, and the concentrated water drained from the membrane filter 30 is transferred to the auxiliary reservoir 60. Circulating again until it is reintroduced and low water level is detected; When the water level of the reservoir 50 is detected, the boosting pump 64 and the water supply valve 66 are turned off, and the primary drain valve 14 and the secondary drain valve 62 are closed. Continuing to flow in; When the counting timer 70 expires as much as the set time of the maximum contamination level of the auxiliary reservoir 60 by the concentrated water, the solenoid valve 16, the boosting pump 64 is turned off, and the water supply valve 66 and the primary drainage Closing the valve 14 and opening the secondary drain valve 62 to drain the concentrated water; Has

Reference numeral 52 in the drawing is a discharge cock to discharge the water of the reservoir to drink.

It describes the operating state of the present invention configured as described above.

4 is a control flowchart of the reverse osmosis water purification apparatus according to the present invention.

The raw water from the faucet passes through the path of the water quality sensor 12, where the discharged pollutant value is recognized by the controller 80 to determine whether the solenoid valve 16 is opened or closed.

That is, if any excessive concentration of water is introduced, it may cause damage to each filter, so that the boosting pump 64 is not operated and the excess contaminated water is immediately drained through the primary drain valve 14 and the filter at each stage is unreasonable. Appropriate water quality to the extent that it does not go into the auxiliary water tank 60 to be described later.

On the other hand, after removing the various sediment and suspended matter, such as dust residue including the raw water in the pre-treatment filter 10 proceeds to the pre-carbon filter 20.

The all carbon filter 20 removes organic chemicals such as carcinogens, synthetic detergents and residual chlorine that are harmful to the human body, and then flows into the auxiliary reservoir 60.

In order to control the flow of the flow rate when it is introduced into the auxiliary reservoir 60 is to be affected by the flow rate control valves 22, 22-1.

The auxiliary reservoir 60 is equipped with a water level sensor 61 to control the water level of the upper limit and the lower limit, and is connected to the lower end of the auxiliary reservoir 60 to enter the membrane filter 30. Therefore, when the water level of the auxiliary reservoir 60 is detected by the water level sensor 61, the controller 80 turns on the boosting pump 64 and the water supply valve 66, and turns off the solenoid valve 16. To block the inflow of raw water.

Water passing through the water supply valve 66 flows into the membrane filter 30, and the concentrated water is generated due to the characteristics of the filter, and the concentrated water is sent to the auxiliary reservoir 60 to be recycled.

Thus, the water in the auxiliary reservoir 60 is filled with the water passed through the all carbon filter 20 and the concentrated water drained through the membrane filter 30.

On each connection hose (not shown) installed to allow water to flow into the auxiliary reservoir 60, flow rate control valves 22 and 22-1 are provided, and water and membrane filters 30 flowing from the all carbon filter 20 are provided. In order to increase the utilization of the concentrated water by artificially adjusting the ratio of the concentrated water drained from) to about 1: 3.

Water passing through the membrane filter (3) proceeds to the fucarbon filter 40, the fucarbon filter 40 serves as a pre-carbon filter 20 and at the same time removes the pigment. After passing through the carbon filter 40 is stored in the reservoir 50, the inside of the reservoir 50 is composed of a water level sensor 51 and the discharge cock 52, similar to the auxiliary reservoir 60, When the boosting pump 64 and the water supply valve 66 is turned off to prevent the stored water from overflowing to the outside.

When the water continuously flows out through the discharge cock 52 and reaches the lower limit point, the water level sensor 51 detects this and turns on the boosting pump 64 and the water supply valve 66 to supply water to the water tank 50. Let inflow

When the circulation of water to the membrane filter 30 is repeated, the concentration of the auxiliary reservoir 60 gradually increases, and when the predetermined time set by the timer 70 expires, the water supply valve 66 and the boosting pump 64 are turned off. And the secondary drain valve 62 is turned on to drain the concentrated water.

On the other hand, the timer 70 is counted when the water flowing into the auxiliary reservoir 60 and the set time is a mixture of the concentrated water drained from the membrane filter 30 and the purified water flowing from the all carbon filter 20 It should be set on the basis of the time when this regulated pollution concentration value is reached.

Referring to FIG. 4 in more detail, when it is determined by the water quality sensor 12 that the pollution concentration of the raw water is an overconcentration of the concentration that will adversely affect each filter, the control unit 30 opens the primary drain valve 14. It is opened so that it does not enter the filter at each stage and drains out.

When the low water level is detected by the water level sensor 61 of the auxiliary water tank 60, the solenoid valve 16 is turned on and the boosting pump 64 and the water supply valve 66 are turned off.

On the other hand, if the water level is detected on the contrary, the timer 70 performs the counting operation, turns off the solenoid valve 6 and the 1st and 2nd drain valves 14 and 62, and the sub-putting pump 64 and the water supply valve 66 ) Turn on.

Water from the auxiliary reservoir 60 enters the membrane filter 30 again by the boosting pump 64, and the water passing through the membrane filter 30 passes through the connecting hose to the fucarbon filter 40. .

Therefore, this cycle operation is continued until the timer 70 expires counting the time by the set time set in the controller 80.

On the other hand, when the water level of the reservoir 50 is full, the boosting pump 64, the water supply valve 66 is turned off and when the low water level is detected, the boosting pump 64, the water supply valve 66 is turned on to control the flow of water. do. In addition, when the set time expires and the operation of the boosting pump 64 is stopped, the secondary drain valve 62 is opened, and the boosting pump 64 and the water supply valve 66 are turned off, The water is drained out.

Therefore, if the present invention is applied to a water purification device, a significant reduction in water can be expected while effectively reusing the treatment of a large amount of concentrated water generated due to the characteristics of membranes. In addition, there is an advantage in that the cost of filter replacement can be reduced by preventing a large number of filter damages caused by a large amount of contaminated water generated after reuse of raw water.

An object of the present invention is to install a water quality sensor in front of the pre-treatment filter to block the inflow of contaminated water at the source, and to recycle the concentrated water drained from the membrane filter and at the same time adjust the recycle time according to the water quality of the raw water To provide a reverse osmosis water purification device and a control method for protecting the filter by laying a.

Claims (5)

In the reverse osmosis water purification device for filtering raw water through a multi-stage pretreatment filtration filter, a membrane filter, and a post-treatment filter to store water in a storage tank and to circulate the drained concentrated water to be refiltered, the front end of the pretreatment filter 10 A water quality sensor 12 installed in the water quality sensor 12 to detect the pollution concentration of the raw water and to block the inflow of the polluted water at the source; A primary drain valve 14 which is installed between the water quality sensor 12 and the pretreatment filter 10 and drains according to the pollution concentration of raw water; A solenoid valve (16) installed between the primary drain valve (14) and the pretreatment filter (10), the opening and closing of the water channel by an electric operation according to the pollution concentration state; It is installed between the all-carbon filter 20 and the membrane filter 30 to pump water from the all-carbon filter 20 by the boosting pump 64 to be delivered to the membrane filter 30, while the membrane filter ( 30) an auxiliary reservoir 60 for draining water; A secondary drain valve 62 connected to a lower portion of the auxiliary reservoir 60 and configured to drain according to a contamination state of the concentrated water; A timer (70) for setting a time of the maximum pollution value of the concentrated water circulated in the auxiliary reservoir (60) and opening the secondary drain valve (62) when the time expires; The contamination concentration from the water quality sensor 12 is detected and the solenoid valve 16 is closed, and then the primary drain valve 14 is opened, and the membrane filter when the auxiliary reservoir 60 is full. 30) to pump the water, and the reverse osmosis water purification, characterized in that it comprises a control unit 80 to drain the concentrated water through the secondary drain valve 62 when the timer 70 expires. Device. The flow rate control valve of claim 1, wherein the flow rate control valve is installed between the all carbon filter 20 and the auxiliary reservoir 60, and between the auxiliary reservoir 60 and the membrane filter 30, respectively, to adjust the flow rate of the inflowing water. Reverse osmosis water purifier, characterized in that the (22) (22-1) is provided. The reverse osmosis water purification apparatus according to claim 1, wherein a water level sensor 61 is installed at one side of the auxiliary reservoir 60 to detect an upper limit and a lower limit of the concentrated water. The reverse osmosis pressure according to claim 1, wherein a water supply valve 66 is provided between the boosting pump 64 and the membrane filter 30 to electrically control the pumped water of the auxiliary reservoir 60. Water purifier. In the reverse osmosis water purification control method to filter the raw water through a multi-stage pretreatment filtration filter, a membrane filter, and a post-treatment filter to store the water in the reservoir and circulate the drained concentrated water to be refiltered. If the detected pollution concentration is higher than the set concentration, the solenoid valve 16 is closed and the primary drain valve 14 is opened. If it is lower than the set concentration, the solenoid valve 16 is opened. Storing raw water through the pretreatment filter 10 and the pre-carbon filter 20 to the auxiliary reservoir 60; When the water level of the auxiliary reservoir 60 is detected, the timer 70 is operated and the solenoid valve 16, the primary drain valve 14, and the secondary drain valve 62 are closed, and the water supply valve ( 66) and the boosting pump 64 are turned on to flow into the reservoir 50 through the membrane filter 30 and the fucarbon filter 40, and the concentrated water drained from the membrane filter 30 is transferred to the auxiliary reservoir 60. Circulating again until it is reintroduced and low water level is detected; When the water level of the reservoir 50 is detected, the boosting pump 64 and the water supply valve 66 are turned off, and the primary drain valve 14 and the secondary drain valve 62 are closed. Continuing to flow in; When the counting timer 70 expires as much as the set time of the maximum contamination level of the auxiliary reservoir 60 by the concentrated water, the solenoid valve 16, the boosting pump 64 is turned off, and the water supply valve 66 and the primary drainage Closing the valve 14 and opening the secondary drain valve 62 to drain the concentrated water; Control method of the reverse osmosis water purification device, characterized in that consisting of.