JP2010064032A - Water purifying apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water purifying apparatus which has no problem of fungus contamination and which is small and safe. <P>SOLUTION: The water purifying apparatus separates and produces permeated water and condensed water from raw water by a water purifying means equipped with a reverse osmosis membrane 2 and supplies the permeated water. In the water purifying apparatus, a raw water supply channel 11 for supplying the raw water to the reverse osmosis membrane 2 and a permeated water supply channel 12 for supplying the permeated water outside are provided and further a water cock 13 which starts and stops water supply from the permeated water supply channel 12 by opening/closing the raw water supply channel 11 is provided at one place. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a water purifier that supplies purified water generated by processing raw water, and more particularly to a water purifier that provides high-quality water using a reverse osmosis membrane.

  In recent years, interest in health and the environment has increased, and research and development of water treatment systems for producing purified water and pure water have progressed. A water treatment system is a system that obtains high-purity water by removing impurities from raw water or well water under the Water Supply Law, and obtains high-purity water. Drinking water in the event of water shortage or disaster Indispensable for supply systems.

  In particular, water treatment systems that use reverse osmosis membranes (also called reverse osmosis, RO) as a means to remove impurities from raw water are medical facilities, food processing facilities, and semiconductor cleaning factories. High demand has been gained in facilities that require advanced hygiene management.

  This reverse osmosis membrane is an artificial semipermeable membrane having ultrafine pores of 0.0001 to 0.0005 microns and can selectively permeate only water molecules. Therefore, even very fine impurities such as dioxins, heavy metals and viruses contained in raw water can be removed with a high removal rate, and extremely safe pure water can be produced.

  Generally, a water purifier that discharges RO water using a reverse osmosis membrane is a mechanism that finally obtains RO water after pre-treatment before the reverse osmosis membrane. For example, Patent Document 1 proposes a water purifier that performs purification using a reverse osmosis membrane via a prefilter and a carbon filter.

  By the way, the conventional reverse osmosis membrane uses a cellulosic material as a membrane material, and may be eroded by bacteria. Therefore, research on new membrane materials advanced, and polyamide-based materials were developed. By adopting this new polyamide-based material, the reverse osmosis membrane has increased permeate volume, improved removal performance, and is not affected by bacteria. However, on the other hand, there has been a problem that the membrane material is eroded by chlorine present in the water.

  In order to cope with this, it has become necessary to remove chlorine from tap water which is raw water. Therefore, it is well established as a general pretreatment method to employ a microfilter to remove coarse dust present in the raw water and to employ an activated carbon filter or the like to remove chlorine.

  However, if a large number of filters such as microfilters and activated carbon filters are provided as a pretreatment for the reverse osmosis membrane, the size of the apparatus is increased, which is not preferable for a domestic water purifier. Therefore, downsizing of the reverse osmosis membrane body has been required.

  If priority is given to downsizing of the apparatus, the amount of permeated water per unit time of the reverse osmosis membrane can be obtained only about 100 cc to 200 cc per minute in a general household apparatus. In order to make up for the shortage of permeated water, a dedicated water storage tank has been devised.

  There are two types of water storage tanks: an open type and a pneumatic type. In the case of an open type, it cannot be denied that there may be a problem in ensuring the safety of water quality during storage, and it is inevitable to control the amount of water stored and install a water pump for supplying water from the tank. This leads to further enlargement of the device and impairs economic efficiency.

  On the other hand, in the case of the pneumatic type, the development of a device called an auto shut-off valve automatically shuts off the supply water due to the balance between the tank internal pressure and the supply water pressure. It was to be done.

  FIG. 10 shows an example of a water purifier that is equipped with a tank for the purpose of securing the amount of RO water immediately after the start of water supply and employs an auto shut-off valve. The water purifier 1 is configured such that it passes through one path 32 of the auto shut-off valve 3 before the reverse osmosis membrane 2 and passes through the other path 31 to the permeated water path. In such a water purifier 1, a permeate water storage tank 4 is provided in the permeate path, branched from the downstream of the auto shut-off valve 3.

  In FIG. 10, SF is a sediment filter, CF is a carbon filter, PF is a post carbon filter, B1 is a ball valve, B2 is a check valve, and B3 is a constant flow valve. SW is a pressure switch that switches ON / OFF according to the detected pressure, P is a pressure pump that is turned ON / OFF by the pressure switch, and AD is for connecting the pressure pump P to the power source via the pressure switch SW. The AC adapters CN1 and CN2 are connectors.

  In such a configuration, immediately after the RO water temporarily stored in the tank 4 is discharged and used, the raw water filtration process inside the apparatus does not stop immediately after the discharge port is closed, and the purification operation is continued, and the permeated water enters the tank 4. When the tank 4 is filled and the tank 4 is full, the pressure increases, and the raw water supply is closed by the auto shut-off valve 3 so that the entire apparatus is in a resting state. When water supply is resumed, first, purified water from the tank 4 is discharged and used to obtain a constant amount of water.

  In addition, as the internal pressure of the tank 4 increases, the ratio of the permeate flowing into the tank 4 and the ratio of the concentrated drainage decrease, and the ratio of the permeate flows into the tank 4 is almost immediately before the tank 4 is full. Raw water will be discharged.

Further, the pressurizing pump P is incorporated as a pressurizing device in order to further improve the performance of the reverse osmosis membrane 2 in the case of low water pressure. The pressure pump P automatically stops when the pressure switch SW detects that the internal pressure after the pressure pump P has increased to a constant pressure (including when the tank 4 is full), and the pressure is increased. It is a mechanism to prevent the influence on the device by going up too much.
Japanese Patent No. 2620574

  As described above, by installing the tank, the stored water in the tank can be used at once at the start of use. However, in order for the auto shut-off valve to function, the supply water pressure must always be applied in the apparatus. In addition, even if a pressure pump is built in, the pump continues to operate until the tank is full and the internal pressure rises. Sex has always been included.

  And also about the water stored in a tank, in order to remove the odor which generate | occur | produces from a tank inner material during storage, the post-process activated carbon filter (post carbon filter) needed to be provided side by side. Although such a post-carbon filter is effective in removing odors generated during storage in the tank, it is possible to remove RO from microbes living in the pores of activated carbon and air mixed in raw water, and water droplets remaining in the faucet. There is a possibility that microorganisms and the like mixed in the water in reverse flow will be propagated, and the water quality finally discharged from the faucet has a great influence of bacterial contamination.

To summarize the above, the water purifier using a reverse osmosis membrane has the advantage that it can obtain a high quality permeated water by taking advantage of its separation performance. It can be said that there was such a problem.
(1) Since the tank was equipped, there was a possibility of microbial elution due to odor elution and post-treatment filters installed for odor control.
(2) Since a post-processing filter is separately provided, the size of the apparatus is increased.
(3) Since the water supply is stopped by the auto shut-off valve, the internal pressure always rises and the internal pressure is constantly applied to all parts, so there is a possibility of deterioration of parts and water leakage.
(4) Even in an apparatus that does not have a tank, the internal pressure is applied to the water outlet.

  The present invention has been proposed in order to solve such problems of the prior art. The purpose of the present invention is a small size, no problem of fungal contamination, and a low possibility of deterioration of parts and water leakage. The purpose is to provide a water purifier.

  In order to achieve the above-mentioned object, the invention of claim 1 is characterized in that in a water purifier for separating permeated water and concentrated water from raw water by a reverse osmosis membrane and supplying the permeated water, raw water is supplied to the reverse osmosis membrane. An open / close means that includes a raw water supply path to supply and a permeate water supply path to supply the permeated water to the outside, and that starts and stops water supply from the permeate water supply path by opening and closing the raw water supply path. It is provided at the place.

  In the invention as described above, when the water supply is stopped, if the user stops the inflow of the raw water using one opening / closing means, the supply of the permeated water is also stopped in synchronization with this. Without stopping, it will be in a stopped state. For this reason, all the pressure is applied only to the switchgear, and after the switchgear, the device is released from the internal pressure, so that it is possible to prevent the risk of water leakage. By eliminating the need for a tank, an auto shut-off valve, and a post carbon filter, it is possible to reduce the size and cost of the equipment while preventing fungal contamination.

  According to a second aspect of the present invention, in the water purifier of the first aspect, the opening / closing means includes a single operation means for opening / closing the raw water supply path.

  In the above invention, since the start and stop of supply of raw water and the start and stop of water supply can be synchronized by a single operation means, the operability for the user is improved.

  According to a third aspect of the present invention, in the water purifier according to the first or second aspect, a switch that opens and closes depending on a predetermined water pressure, flow rate, or water quality, and a pressure pump that switches operation by the switch are provided. Features.

  In the invention as described above, when the opening / closing means is opened, the switch detects that the raw water pressure, the raw water amount or the raw water quality has reached a predetermined value, and the pressure pump operates to reduce the water pressure to the reverse osmosis membrane. Secured. When the opening / closing means is closed, the switch detects that the raw water pressure, the raw water amount or the raw water quality has reached a predetermined value, and the pressurizing pump stops. As in the case of using a tank and an auto shut-off valve, the influence on the apparatus is less than when the pressure pump is stopped after waiting for a high pressure.

  According to a fourth aspect of the present invention, there is provided the water purification apparatus according to any one of the first to third aspects, wherein the inlet of the raw water to the reverse osmosis membrane is an annular water flow when viewed from the cross-sectional direction of the reverse osmosis membrane. A plurality is provided so as to be in a direction.

  In the invention as described above, by providing the plurality of inlets so that the water flow is in one direction, it is possible to secure a high water volume while preventing interference of the water flow.

  According to a fifth aspect of the present invention, in the water purifier according to any one of the first to fourth aspects, the flow path from the raw water inlet to the reverse osmosis membrane is inclined toward the reverse osmosis membrane. Features.

  In the invention as described above, since the raw water from the inflow port efficiently flows into the reverse osmosis membrane with a small pressure loss, a high amount of water can be maintained.

  The invention according to claim 6 is the water purifier according to any one of claims 1 to 5, wherein an activated carbon filter is provided in front of the reverse osmosis membrane in the raw water supply path, and the activated carbon filter is an outer periphery of the activated carbon. The surface is covered with a nonwoven fabric, and the nonwoven fabric has a multilayer structure in which the pore diameter decreases from the outside to the inside.

  In the invention as described above, since the nonwoven fabric covers the outer peripheral surface of the activated carbon, the surface area is maximized and the trapping area of the turbid material is maximized. Moreover, since the pores of the nonwoven fabric have a multilayer structure in which the diameter from the outside to the inside becomes small, the trapping efficiency of the turbid substance is hardly lowered.

  A seventh aspect of the present invention provides the water purifier according to any one of the first to sixth aspects, wherein the cylindrical container that houses the reverse osmosis membrane, a lid that closes the opening of the container, and the lid that is the container A fixing device that is displaceable between a fixing position for fixing to the container and a releasing position for releasing the lid from the container; a biasing position that biases the fixing tool to the fixing position; and a release that releases the biasing And an operation unit that is displaceable between positions.

  In the invention as described above, the lid can be securely fixed to the container by the fixing tool, and can be easily removed by the operation portion.

  As described above, according to the present invention, it is possible to provide a safe water purification apparatus that is small in size and has no problem of fungal contamination, and has a low possibility of deterioration of components and water leakage.

  The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be specifically described with reference to the drawings. In this embodiment, the water treatment system using the reverse osmosis membrane of the present invention is applied to a domestic water purifier. In addition, description is abbreviate | omitted about the member similar to the member demonstrated by said prior art, a general member, etc.

[Configuration of Embodiment]
First, the configuration of the present embodiment will be described. That is, as shown in the system diagram of FIG. 1, the water purifier 10 of this embodiment includes a pressure switch SW, an activated carbon filter CF, a reverse osmosis membrane 2, a tap water (raw water) supply path (raw water supply path 11), A pressurizing pump P is installed, and a check valve B2 is provided in the permeated water path (permeate water supply path 12) from the reverse osmosis membrane 2, and a constant flow valve B3 is provided in the concentrated water path. .

  The reason why only the activated carbon filter CF is used as the pretreatment filter for the reverse osmosis membrane 2 is as follows. That is, the legal definition of a household water purifier according to the Ministry of Economy, Trade and Industry's Household Goods Quality Labeling Law stipulates that raw water is tap water. This tap water is extremely free of turbid substances. Thus, it is not necessary to equip a large volume pretreatment filter for removing turbid materials with less contamination.

  On the other hand, tap water is obliged to contain 0.1 ppm or more of chlorine. As described above, it is residual chlorine in tap water that greatly affects the performance and life of the reverse osmosis membrane 2. Therefore, an activated carbon filter CF for removing chlorine is provided as a pretreatment filter for removing residual chlorine.

  Such an activated carbon filter CF can be expected to capture turbid substances by the activated carbon itself or the non-woven fabric covering the outer peripheral surface thereof. Therefore, in the present embodiment, the entire apparatus is reduced in size by omitting the microfilter and placing the role on the nonwoven fabric and the activated carbon itself.

  In the activated carbon filter CF, the nonwoven fabric has a cylindrical shape that covers the outer peripheral surface of the activated carbon so that the trapping area of the turbid material is maximized, and the surface area is maximized. In addition, the nonwoven fabric covering the outer peripheral surface of the activated carbon has a structure in which the trapping efficiency of turbid substances is not easily lowered by adopting a multilayer structure in which the diameter decreases (increases density) from the outside to the inside of the pores. It can be.

  Next, as the reverse osmosis membrane 2, a membrane capable of sufficiently securing the amount of water while suppressing an increase in size is adopted. For example, a large reverse osmosis membrane used for business can be cut into a minimum length and used.

  Further, the vessel (housing = container) for incorporating the reverse osmosis membrane 2 has a structure in which the water supply to the reverse osmosis membrane 2 is smoothly reduced and the pressure in the water passage leading to the reverse osmosis membrane 2 is extremely low. And The lid portion at the end of the vessel has a physical structure that can withstand sufficient pressure, and the material thereof is made of a material that retains flexibility and strength.

  For example, an example of a structure that does not obstruct the water flow is shown in FIGS. 2 and 3, 21 is a cylindrical vessel incorporating the reverse osmosis membrane 2, 22 is a circular lid, and 2 a is a permeate water collecting part inside the reverse osmosis membrane 2. The plurality of inlets 22a to the reverse osmosis membrane 2 formed in the lid 22 are provided so that the water flows are in the same direction (clockwise in the figure) as shown in FIG. 2, and do not interfere with each other. Like that.

  This direction applies the laws of nature and can be either clockwise or counterclockwise according to the northern or southern hemisphere, so that the spiral force can be applied to the maximum. Moreover, as shown in FIG. 3, the cross section of the inlet 22a to the reverse osmosis membrane 2 and the flow path subsequent thereto is slightly inclined in the direction of the reverse osmosis membrane 2 so that the pressure loss can be reduced.

  Moreover, as a device of the material, for example, the vessel 21 is manufactured from a stainless steel material, and the increase in volume is suppressed to the minimum while satisfying the above requirements. Further, a reinforcing member for reinforcing the outer periphery of the end portion of the vessel 21 is provided.

  Furthermore, a fixing tool 23 is provided to securely fix the lid 22 that closes the opening at the end of the vessel 21 and to facilitate the detaching operation. As shown in FIG. 4, the fixture 23 is a ring-shaped member partially broken. The fixing tool 23 is formed of an elastic material such as resin or metal, and as shown in FIGS. 3 and 4A, in a direction (outside) to be fitted in the groove 21a formed in the vessel 21. The elastic force is working.

  And in the fracture | rupture part in the fixing tool 23, a pair of operation part 23a protruded inside is provided. When the operation part 23a is picked up by a user and moved in the direction approaching, as shown in FIG. 4 (B), the fixing tool 23 is displaced inward against its elastic force, so that it is disengaged from the groove 21a. Thus, the lid 22 can be released so as to be removable.

  In the pressure switch SW, the minimum water pressure for turning ON / OFF the pressure pump P is set to a low value around 0.01 MPa. As a result, the pressure switch SW operates the pressurizing pump P with the fact that the pressure of the raw water has started to flow and the pressure has increased to the minimum water pressure, and the water pressure of the feed water has decreased to a pressure below the minimum water pressure. Sometimes, the pressure pump P can be stopped.

  Further, a part of the pipe of the raw water supply path 11 and the pipe of the permeate supply path 12 are collected at a predetermined place and connected to the faucet 13. The water faucet 13 is an opening / closing means that incorporates a check valve in each pipe and that can open and close the raw water supply path 11 by a single operating means (not shown) (for example, a lever, a handle, etc.). This operation means is provided at or near a faucet in a home kitchen, washroom, toilet, bath or the like.

[Effects of the embodiment]
Next, the operation of the present embodiment configured as described above will be described. First, the case where a user obtains the purified water by the reverse osmosis membrane 2 is demonstrated. In the initial state, the operation means of the faucet 13 is in a water stop state, and the other valves are open.

  In this state, the user operates the operation means of the faucet 13 to open the faucet 13 so that the raw water supply passage 11 can pass water. Then, since raw | natural water flows in into the raw | natural water supply path 11, chlorine etc. are removed from the raw | natural water which passed the activated carbon filter CF. When the pressure switch SW detects that the internal pressure has increased to the minimum water pressure, the pressure pump P is activated. The raw water is separated into permeated water from which heavy metals, chemical substances, dissolved substances and the like have been removed and concentrated water by passing through the reverse osmosis membrane 2 with a predetermined pressure obtained by the pressure pump P. The permeated water is supplied to the faucet, and the concentrated water is drained through the concentrated water discharge passage.

  Next, the case where a user stops supply of the purified water by the reverse osmosis membrane 2 is demonstrated. That is, when the user operates the operation means of the faucet 13 to close the faucet 13, the raw water supply path 11 is blocked. Then, when the pressure switch SW detects that the internal pressure of the raw water supply path 11 has suddenly decreased and becomes equal to or lower than the minimum water pressure, the pressure pump P stops. Thereby, the pressure to the reverse osmosis membrane 2 is lost, and the permeated water supply path 12 is stopped. The concentrated water is drained through the concentrated water discharge passage.

  Furthermore, the case where a user obtains the purified water by the reverse osmosis membrane 2 is demonstrated again. That is, when the user operates the operation means of the faucet 13 to open the faucet 13 so that the raw water supply passage 11 passes, the pressurizing pump P is operated as described above, and the raw water is activated carbon. By passing through the filter CF and the reverse osmosis membrane 2, it is separated into permeated water and concentrated water. The permeated water is supplied to the faucet, and the concentrated water is drained through the concentrated water discharge passage.

[Effect of the embodiment]
According to this embodiment as described above, when the user stops the inflow of raw water using the water faucet 13 at one place when the water supply is stopped, the supply of the permeated water is also stopped in synchronization therewith. For this reason, all the pressures of raw water are applied only to the faucet 13, and after the faucet 13, the entire apparatus is released from the internal pressure, so that it is possible to prevent the deterioration of parts and the risk of water leakage.

  Further, by eliminating the need for the tank and the auto shut-off valve, the facility can be reduced in size, simplified, and reduced in cost while preventing fungal contamination (including mixing by backflow from the faucet). This is particularly suitable in a space-constrained environment such as a home. The pressurizing pump P is not required to increase the internal pressure in order to make the tank and the auto shut-off valve function, so that idling can be avoided, and it is released from the risk of fire occurrence due to overheating.

  Moreover, since the raw | natural water flow which flowed in from the several inflow port 22a to the reverse osmosis membrane 2 formed in the lid | cover 22 does not interfere with each other, a high amount of water can be ensured. And since the flow path from the inflow port 22a to the reverse osmosis membrane 2 can reduce pressure loss, a high amount of water can be maintained.

  In addition, when the faucet 13 is closed, the faucet portion has a structure in which water pressure is not applied after the faucet 13, so that the faucet portion can be used as a water supply device by adopting a water supply device certified by the Japan Waterworks Association. Authentication itself becomes unnecessary.

  Furthermore, since the faucet 13 can simultaneously start and stop the supply of raw water and start and stop the supply of water by a single operation means that opens and closes the raw water supply path 11, the operability for the user is improved.

[Other Embodiments]
The present invention is not limited to the above embodiment. As the opening / closing means, any known valve, stopper, etc. can be used as long as the raw water supply path can be opened and closed. The synchronization does not necessarily have to be at the same time, as long as both opening and closing operations are sequentially performed in a relatively short time.

  The operating means is generally a lever or a handle, but may have other structures. For example, an opening / closing means that opens and closes according to the operation of a button switch or the detection of an object by a sensor, such as an electromagnetic valve or an electric valve, may be employed.

  In this case, for example, the opening / closing means is connected to a control device such as a computer or a timer, and control is performed so that the opening / closing means is opened at a preset time, time, or timing in the storage unit of the control device even when water supply is stopped. It is also possible to supply the raw water to the reverse osmosis membrane and prevent the membrane from being dried and deteriorated as instructed by the instruction unit of the apparatus. At this time, the permeated water may be supplied from the permeated water supply path 12, or the permeated water supply path 12 is also provided with opening / closing means connected to the control device, and this is used for water flow through the raw water supply path. You may make it close synchronously.

  The value of the minimum water pressure set in the pressure switch can be freely determined, and is not limited to the above specific numerical examples. In the above embodiment, the pressure pump is operated by detecting a predetermined pressure. However, the pressure pump may be operated by detecting a predetermined flow rate or water quality. That is, instead of the pressure switch, a flow rate switch is provided, and by setting a predetermined amount of water in the flow rate switch, the pressure pump is activated after the predetermined amount of water has been reached, and the amount of water is less than the predetermined amount of water. Sometimes the pressurization pump can be stopped.

  Also, instead of the pressure switch, a water quality switch is provided, and by setting a predetermined water quality to the water quality switch, the pressure pump is operated after waiting for the predetermined water quality to become lower than the predetermined water quality. Waiting for that, the pressurizing pump can be stopped. The relationship of the detected value with respect to the above various set values, such as the pressure for operating the switch, the amount of water, the water quality, etc., can be freely set to be larger or smaller than the set value or as described above.

  The pressure switch, flow rate switch, and water quality switch may be configured separately from the detector for detecting the pressure, flow rate, and water quality, the setting unit for setting the predetermined pressure, flow rate, and water quality, and the switch for switching. Alternatively, it may be configured integrally. The setting unit may be configured by a storage unit such as a memory of a computer, and the instruction unit of the computer may be configured to switch the switch according to the detection value from the detector and the setting value set in the storage unit. Good.

  Further, a device that allows water to flow only by the pressure of a general water supply by omitting a pressurizing pump or the like may be used. It is good also as a water purification apparatus only with a reverse osmosis membrane by omitting an activated carbon filter.

  The structure for fixing the lid of the vessel containing the reverse osmosis membrane is not limited to that exemplified in the above embodiment. For example, as shown in FIGS. 5 and 6, the fixture 24 can be configured by a pair of arcuate members fitted into the grooves 21 a. An arcuate guide portion 24 a is formed at the opposing portion of the pair of fixtures 24. As shown in FIG. 7, the guide portion 24a is provided with an operation portion 25 including an urging portion 25a and an arm portion 25b.

  The urging portion 25a is an oval member, and enters the guide portion 24a and rotates to turn between the urging position for urging the guide portion 24a outward and the release position for releasing the urging force. Displaceable. The arm portion 25b is an oval member that is longer than the biasing portion 25a.

  As shown in FIGS. 6 and 8 (A), when the biasing portion 25a is in the release position, the pair of fixing tools 24 come close to each other and come out of the groove 21a. It becomes possible. When the user rotates the urging portion 25a using the arm portion 25b, the pair of guide portions 24a are urged away from each other as shown in FIGS. 5 and 8B. Since the fixing tool 24 is urged outward and fits into the groove 21a, the lid 22 is fixed. Note that if the urging portion 25a is made of a flexible material or an elastic material, displacement or detachment due to vibration can be prevented. Note that the urging position of the operation unit 25 and the fixture 24 by this may be one place as shown in FIG. 9, or more than two.

  Further, instead of rotating the urging portion 25a in the guide portion 24a, as shown in FIG. 10A, a screw groove 24b is formed in the guide portion 24a of the pair of fixtures 24, and the screw groove 24b. In addition, as shown in FIG. 10B, it is possible to adopt a configuration in which a screw as the operation portion 26 is screwed. In this case, when the operation portion 26 is screwed, the pair of fixing tools 24 are urged outward and fit into the grooves 21a, so that the lid 22 is fixed. When the operation unit 26 is loosened, the pair of fixtures 24 approach and come out of the groove 21a, so that the lid 22 can be removed.

  Moreover, as shown in FIG. 11, a pair of fixing tools 24 are connected by a connecting part having a triangular shape or the like, and a contrasting thread groove is formed in each of the broken parts of the connecting part, It is good also as a structure connected by the sleeve-shaped operation part 27 by which the screw was cut. In such a case, when the operating portion 27 is rotated in one direction, the side of the connecting portion extends and pressure is applied to the outside, so that the fixture 24 cannot be removed. When rotated in the other direction, the side shrinks and the fixture 24 bends inward, so that the lid 22 can be removed.

  Also, as shown in FIGS. 12 and 13, screws are cut on the inner edges of the pair of fixtures 24 and the outer edge of the ring-shaped operation portion 28, and the operation portion 27 is screwed so that the screws are engaged with each other. The fixing tool 24 may be spread outward and fixed. For example, as shown in FIG. 12A, the fixing tool 24 may be formed with a left-rotating protrusion 28 a and a right-rotating protrusion 28 b to facilitate the rotation operation. Further, when a tool is used for the rotation operation, for example, as shown in FIG. 12B, a projection 28c continuous in an arc shape may be formed to increase the strength. In addition, in each said embodiment, although the separation part of a pair of fixing tool 24 is two places on either side, it is good also as one place like the fixing tool 23. FIG.

  Furthermore, in the present invention, any water purification means other than the water purification means exemplified above may be added or omitted. Also, the material, size, shape, etc. of the reverse osmosis membrane, vessel, lid, etc. are not limited to specific ones.

It is a systematic diagram which shows the structure of one Embodiment of the water purifier of this invention. It is a top view which shows the lid | cover of the vessel of the reverse osmosis membrane used for embodiment of FIG. It is sectional drawing which shows the inflow port of the water to the reverse osmosis membrane of FIG. It is a top view which shows the fixing tool of the lid | cover of FIG. 2, and shows a fixing position (A) and a cancellation | release position (B). It is a top view which shows the fixing tool of the lid | cover of other embodiment, and shows a fixing position. It is a top view which shows the fixing tool of FIG. 5, and shows a cancellation | release position. It is a perspective view which shows the operation part which urges | biases the fixing tool of FIG. FIG. 7 is a plan view (A) showing the operation unit in FIG. 6 and a plan view (B) showing the operation unit in FIG. 5. It is a top view which shows the fixing tool of the lid | cover of other embodiment, and shows a fixing position. It is sectional drawing which shows the operation part which urges | biases the fixing tool of the lid | cover of other embodiment, and shows a releasing position (A) and a fixing position (B). It is a top view which shows the fixing tool of the lid | cover of other embodiment. It is a top view which shows the fixing tool of the lid | cover of other embodiment. It is sectional drawing of FIG. It is a systematic diagram which shows an example of the water purifier using the conventional auto shut-off valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,10 ... Water purifier 2 ... Reverse osmosis membrane 2a ... Permeated water collection part 3 ... Auto shut-off valve 4 ... Tank 11 ... Raw water supply path 12 ... Permeated water supply path 13 ... Water tap 21 ... Vessel 21a ... Groove 22 ... Lid 22a ... Inlet 23, 24 ... Fixtures 23a, 25, 26, 27, 28 ... Operation part 24a ... Guide part 24b ... Screw groove 25a ... Biasing part 25b ... Arm parts 28a, 28b, 28c ... Projections 31, 32 ... path AD ... AC adapter B1 ... ball valve B2 ... check valve B3 ... constant flow valves CN1, CN2 ... connector P ... pressure pump SW ... pressure switch

Claims (7)

In a water purifier that separates and produces permeate and concentrated water from raw water using a reverse osmosis membrane, and supplies the permeate,
A raw water supply path for supplying raw water to the reverse osmosis membrane, and a permeated water supply path for supplying the permeated water to the outside,
A water purifier, wherein opening and closing means for starting and stopping water supply from the permeated water supply path by opening and closing the raw water supply path is provided at one place.   The water purification apparatus according to claim 1, wherein the opening / closing means includes a single operation means for opening / closing the raw water supply path.   The purified water according to claim 1 or 2, wherein the raw water supply path is provided with a switch that opens and closes depending on a predetermined water pressure, flow rate, or water quality, and a pressure pump that switches operation by the switch. apparatus.   The inlet of the raw water to the reverse osmosis membrane is provided in plural so that the water flow is in one annular direction when viewed from the cross-sectional direction of the reverse osmosis membrane. The water purifier of any one of Claims.   The water purifier according to any one of claims 1 to 4, wherein the flow path from the raw water inlet to the reverse osmosis membrane is inclined in the direction of the reverse osmosis membrane. In front of the reverse osmosis membrane in the raw water supply path, an activated carbon filter is provided,
In the activated carbon filter, the outer peripheral surface of the activated carbon is covered with a nonwoven fabric,
The water purifier according to any one of claims 1 to 5, wherein the nonwoven fabric has a multilayer structure in which the pore diameter decreases from the outside to the inside. A cylindrical container containing the reverse osmosis membrane;
A lid for closing the opening of the container;
A fixture displaceable between a fixed position for fixing the lid to the container and a release position for releasing the lid from the container;
An operation unit that is displaceable between an urging position that urges the fixing device to a fixing position and a release position that releases the urging force;
The water purifier according to any one of claims 1 to 6, wherein

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