JP5113873B2 - Water purifier - Google Patents

Description

  The present invention includes a water storage tank for storing purified water, an outer case having an outlet for flowing out the stored purified water, a raw water tank stored in the outer case for storing raw water, and stored in the outer case in the raw water tank. A cylindrical filter medium filling portion provided between the outer filter disposed on the outer peripheral surface side and the inner filter disposed on the inner peripheral surface side; The present invention relates to a water purifier provided in the inner case with a collecting channel provided on the inner peripheral side of the inner filter.

  As such a water purifier, there is known a water purifier including a water purifying cartridge that is purified by the raw water flowing in from an inflow port passing through a filter material filling portion in a radial direction (see Patent Document 1).

  And by using such a water purifier, raw water can be purified with a shorter filtration length compared to the case where it passes through the filter medium filling part in the axial direction, so a fine filter medium can be used for the filter medium, and the water purification performance is improved. Can be improved.

  Furthermore, in said water purifier, since an elastic body is arrange | positioned at the inflow port side end surface of a filter medium, since consolidation of a filter medium filling part can be accelerated, water purification performance can be improved.

JP 2001-212555 A (FIG. 1)

  However, in the conventional water purifier as shown in FIG. 6, a dead space 72 in which water stops stays in the water purifying cartridge 6 of the water purifier due to the lid portion 78 having no water permeability. That is, the purified water whose chlorine has been removed and the sterilizing effect has been reduced is stagnant in the dead space 72 and becomes water-stopping, which may increase the risk of bacterial propagation in the water purifier. If the user uses the above water purifier without throwing away water in summer or after not using the water purifier for a long time, it is not preferable in terms of hygiene management and there is room for improvement.

  This invention is made | formed in view of said subject, The objective exists in the point which provides the water purifier which can supply safe drinking water by a user.

A water purifier according to the present invention for achieving the above-described object includes a water storage tank for storing purified water, an outer case having an outlet for discharging the stored purified water, and a raw water tank for storing raw water stored in the outer case. And an inner case that is stored in the outer case and communicates with the raw water tank and into which raw water flows,
A cylindrical filter medium filling portion disposed between an outer filter disposed on the outer peripheral surface side and an inner filter disposed on the inner peripheral surface side, and a collective flow provided on the inner peripheral side of the inner filter A water purifier in which the raw water is purified by passing the filter medium filling portion in the radial direction between the outer peripheral side of the outer filter and the collecting flow path. The characteristic configuration includes an opening in the inner case that allows water to pass in the axial direction of the filter medium filling part, guides the raw water from the raw water tank through the opening to the filter medium filling part, It is in the point leading to the water tank. This configuration can be employed in a water purifier such as a pot type water purifier.

  According to the above characteristic configuration, by providing the opening that allows water to flow in the axial direction of the filter medium filling portion, it is possible to maintain the state in which the raw water flows through the filling gap generated on the raw water inlet side in the axial direction of the filter medium filling portion. Therefore, the dead space in which the water stop stays can be eliminated, and the risk of bacterial propagation can be reduced. Furthermore, since the water passage in the inner case can be simplified, an easy and inexpensive water purifier can be manufactured. Further, in the conventional structure, since water is not passed, the filter medium specific part can be effectively used by passing water in the axial direction with respect to the filter medium specific part that could not exhibit a sufficient water purification function. . Furthermore, since water pressure is applied to the filter medium filling part in the axial direction from the opening, consolidation to the filter medium filling part can be accelerated, so that water purification performance can be improved.

  The further characteristic structure of the water purifier which concerns on this invention exists in the point which the said raw | natural water passes the said filter material filling part in the radial inner direction which goes to the said collection flow path from the outer peripheral side of the said outer filter.

  According to the above characteristic configuration, since the flow path is formed from the outer side to the inner side of the water purification cartridge, the raw water is caused to flow from the outer peripheral flow path having a wide cross section on the outer peripheral side to the collective flow path having a lower cross section on the inner peripheral side. Can demonstrate sufficient water purification performance. Moreover, the stability of the structure of the water purification cartridge is improved because the flow path is directed to the axis, and the possibility of water leakage and the like can be reduced.

  The further characteristic structure of the water purifier which concerns on this invention exists in the point which has arrange | positioned the 1st filter which can permeate | transmit water to the said opening part.

  According to the above characteristic configuration, while allowing water to pass through the first filter, it is possible to prevent, for example, foreign matters having a relatively large particle diameter from reaching and accumulating in the filter medium filling part, and the filter medium from the filter medium filling part. It is possible to prevent leakage to the outside.

  A further characteristic configuration of the water purifier according to the present invention is that, between the opening and the filter medium filling unit, a second filter having a lower water permeability than an inflow side filter of the inner filter or the outer filter is used as the filter medium. It exists in the point arrange | positioned so that sliding to the axial direction of a filling part is possible.

  According to the above characteristic configuration, the second filter with low water permeability is pressed and slid in the axial direction by the water pressure due to the inflow of raw water at the opening of the filter medium filling section to accelerate the consolidation of the filter medium filling section. Therefore, water purification performance can be improved. In addition, by providing the second filter, the end surface of the filter medium filling portion in the opening is strongly pressed compared to a structure not provided with the filter, so that consolidation is accelerated. To do. Further, channeling in which a large amount of water flows only in a specific portion of the passage can be suppressed, and a constant water quality can be maintained. Furthermore, the end face of the filter medium filling part can be pressed uniformly, and the end face is kept horizontal with respect to the axial direction, so that the filtration length can be kept constant in any flow path, and the water quality is always constant. Can be maintained. Furthermore, since the second filter has a structure that allows water to pass therethrough, it is possible to prevent bacteria from breeding by providing a structure that always allows water to flow through the filling gap.

  The further characteristic structure of the water purifier which concerns on this invention exists in the point which has arrange | positioned the raw material which a volume expand | swells by water flow between the said opening part and the said filter material filling part.

  According to the above characteristic configuration, the water is passed through a material such as a dry ion exchange resin or a water-absorbent resin (hereinafter referred to as an expanded material) whose volume is expanded by passing water, so that the volume is expanded and the filling gap is filled. Since the consolidation of the filling portion is accelerated, the water purification performance can be improved. Further, by separating the filter medium and the expansion material, the filtration performance can be maintained higher than in the case of mixing the expansion material in the filter medium, so that the water purification performance can be improved.

  A further characteristic configuration of the water purifier according to the present invention is a filtration length in which the filter medium filling part is filtered through the opening in the axial direction, and the filter medium filling part is filtered in the radial direction. It is at a point longer than the filtration length.

  According to the said characteristic structure, even if it is the raw | natural water which passed the filter-medium filling part to the axial direction, the water quality equivalent to the case where it passed by radial direction can be ensured. That is, since the filter medium in the filter medium filling portion is configured to flow, the inlet end surface from the axial direction does not maintain a plane perpendicular to the axis, and the filtration length depends on the position of the end surface into which the raw water flows. When the raw water passes through the filter medium filling part in the axial direction by arranging the end face of the filter medium filling part so that the shortest possible filtration length in the axial direction is equal to or greater than the filtration length in the radial direction. Even so, it is possible to ensure a water quality equivalent to or higher than that when passing in the radial direction.

  The inventors detected from the discharge pipe when bacteria were intentionally propagated and passed through the dead space in the water purifier having the conventional structure and the structure part that conventionally formed the dead space in the water purifier having the present structure. The number of bacteria to be measured was measured. As a result, in the conventional structure, bacteria were continuously detected even after a lapse of time, whereas in the inventive structure of the present invention, an experimental result was obtained that the number of bacteria was not detected in about 10 seconds after passing water. From this result, by taking the structure of the present application, it was found that the inside of the water purifier can be made into an environment in which bacteria are difficult to propagate, and the water purifier can supply highly safe water to the user. The present invention is based on these findings.

Side sectional view which shows schematic structure of pot type water purifier Side sectional view of a stationary water purification pot with a structure with a filter in the opening Side cross-sectional view of a pot-type water purifier equipped with a material whose volume is expanded by passing water Side cross-sectional view of a pot-type water purifier with a structure that allows raw water to flow from the outer peripheral channel to the collecting channel Side sectional view showing schematic configuration of countertop water purifier Side sectional view which shows schematic structure of the conventional water purifier

  First, in relation to the embodiment of the present invention, for the purpose of explaining the main configuration of a pot-type water purifier as a water purifier of the present invention, a countertop type water purifier installed in a kitchen counter is used as a reference form, and a drawing. Based on

[Reference form]
The water purifier shown in FIG. 5 is configured as a counter top type water purifier installed at a kitchen counter, and water is supplied from the switching valve 2 connected to the faucet 1 and the water supply hose 3 from the switching valve 2. A water purifier body 4, a water purification cartridge 6 that filters the water received from the water purifier body 4, and a water purification discharge pipe 8 that guides and discharges the water filtered by the water purification cartridge 6 to the water purification outlet 81.

  In addition, although mentioned later for details, the said water purification cartridge 6 is provided with the inner case 62 accommodated in the outer case 61 and the outer case 61, and the internal flow path lets water flow, without water retaining. It is configured as follows.

  Further, the water purification cartridge 6 has a cylindrical shape in which an inflow port 60 that protrudes downward and communicates with the water supply passage 43 of the water purifier main body 4 and an outflow port 67 that protrudes upward and is connected integrally with a purified water discharge pipe 8 described later. An outer case 61 is provided, the water received in the inner case 62 from the water supply channel 43 of the water purifier body 4 through the inlet 60 is filtered, and the filtered purified water is supplied from the outlet 67 to the purified water discharge pipe 8. It is configured.

  The switching valve 2 is configured to supply the raw water received from the faucet 1 to the water purifier main body 4 through the water supply hose 3 and discharge the purified water from the purified water discharge port 81 by the swinging operation of the switching lever 2a. 1 is configured to be switched between a raw water discharge state in which raw water received from 1 is discharged from a raw water discharge port (not shown) and a shower state in which raw water received from the faucet 1 is discharged from a shower port (not shown).

  The water purifier main body 4 is provided with a cylindrical main body casing member 41 and a joint portion 42 provided below the main body casing member 41 to which the water supply hose 3 is connected. A water supply passage 43 through which water supplied from the water supply hose 3 flows is provided.

  Next, a structure in which the water purification cartridge 6 suppresses bacterial propagation inside and improves water purification performance will be described with reference to FIG.

In the cartridge casing 77, the water purification cartridge 6 includes an outer case 61 having an inflow port 60 through which raw water flows into one end surface and an outflow port 67 through which purified water flows out to the other end surface, and an inner case 62 housed in the outer case. It has. Then, the inner case 62 has an outer filter 64 capable of passing water on the outer peripheral side surface, a cylindrical filter medium filling portion 65 for purifying raw water inside the outer filter, and a water passage on the inner peripheral side surface of the filter medium filling portion 65. A possible inner filter 63 has a collecting channel 69 communicating with the outlet 67 in the inner filter 63, and an outer peripheral channel 68 is provided between the outer case 61 and the inner case 62. Further, the filter medium filling section 65 includes a water flow section 75 that allows water to flow in the radial direction from the side surface, an opening section 74 that can flow in the axial direction from the end face on the outlet 67 side, and a filter medium in the opening section 74. A first filter 96 for preventing outflow and a partition wall 66 on the inner side surface and the outer side surface on the outlet 67 side are provided. For the outer filter 63 and the inner filter 64, a net, a nonwoven fabric or the like is used.
In addition to the flow path (a) in which the raw water supplied to the water purification cartridge 6 passes through the filter medium filling part 65 in the radial direction, a part of the raw water passes through the filter medium filling part 65 in the axial direction (b). Pass through. The raw water passing through the flow path (a) passes through the outer peripheral flow path 68 and passes through the filter medium filling section 65 from the water flow section 75 in the radial direction. On the other hand, the raw water passing through the flow path (b) does not pass through the water passage portion 65, passes through the outer peripheral flow path 68 toward the outlet 67, passes through the opening 74, and passes through the filter medium filling portion 65 in the axial direction.

  By adopting the structure in which the flow path of (b) is formed, the dead space existing in the conventional structure shown in FIG. 6 is eliminated, and the risk of bacterial growth due to the retention of water stoppage is reduced. Furthermore, also in the dead space formed in the space 73 on the outlet side in the outer peripheral flow path 68, the retention of the water stop is suppressed and a good flow path can be formed.

  Further, the filtration length L2 of the channel (b) is configured to be longer than the filtration length L1 of the channel (a). By doing in this way, for example, even when the raw water inlet side end surface of the filter medium filling unit 65 is not perpendicular to the axis, the shortest filtration length in the filter medium filling unit 65 is always equal to or longer than the filtration length L1, The minimum filtration length can be maintained, and the quality of purified water can be maintained above a certain level.

  Next, an embodiment of the present invention will be described based on the drawings.

Embodiment 1
Although the counter top type water purifier has been described in the previous reference form, in the present invention, the above configuration is applied to a pot type water purifier as shown in FIG. In the pot type water purifier, the raw water stored in the raw water tank 101 flows into the collecting channel 69 or the opening 74 in the inner case. The raw water that has flowed into the collecting channel 69 passes through the inner filter 63, and then is filtered by passing through the filtration length of L1 in the radial direction by the filter medium filling unit 65, and then passes through the outer filter 64, thereby Is stored in a water storage tank 102 provided in On the other hand, the raw water that has passed through the opening 74 passes through the filter material filling portion 65 in the axial direction by a certain distance L2 and is filtered, and then passes through the outer filter 64 and is stored in the water storage tank 102.

[Embodiment 2]
As shown in FIG. 2, the pot-type water purifier may include a second filter 92 having a lower water permeability than the inner filter 63 in a form slidable in the axial direction. Further, a guide 93 is provided for the partition wall 66, and the second filter 92 is arranged along the partition wall 66 together with the guide 93 so as to slide with the filter surface perpendicular to the axial direction. A stopper 94 is provided on the opening 74 side of the guide 93 so that the axial sliding of the second filter 92 can be restricted within a certain range.

  When raw water flows in, the raw water inlet end surface in the axial direction of the filter medium filling portion 65 is pressed against the second filter 92 in a form along the guide 93 because of water permeability. On the other hand, when the inflow of the raw water stops, the second filter 92 is released from the water pressure and floats in a form of being restrained between the stopper 94 and the raw water inlet end face of the filter material filling unit 65.

  By taking such a structure, the consolidation of the filter medium filling part 65 is accelerated, and the end face of the filter medium filling part 65 is uniformly pressed. Due to the above effects, channeling in the filter medium filling portion 65 can be prevented. Furthermore, the filtration length can be maintained uniformly by the effect | action of a postscript, and the water quality more than a fixed level can be maintained also with the raw | natural water which passed any filtration path | route.

  Further, since the second filter 92 has a structure that allows water to pass therethrough, a structure in which the filling gap 72 in the conventional structure of FIG. 6 does not exist can be taken, and therefore, an environment in which bacteria propagate can be prevented.

[Embodiment 3]
Furthermore, as shown in FIG. 3, the pot-type water purifier is provided with a material 95 whose volume is expanded by water flow at the downstream end of the opening 74 at the axial inlet end surface of the filter medium filling unit 65. You can also A filter such as a net or a nonwoven fabric is provided as a stopper 96 on the opening 74 side of the material 95.

The material 95 is made of dry ion exchange resin, water absorbent resin, or the like, and expands to the maximum volume in 1 to 2 seconds after passing water, and maintains the expanded form after expansion. However, even in this expanded state, the water permeability of the part is ensured to some extent.

  Regardless of whether or not the raw water is flowing, the structure as described above is always in a state where the consolidation of the filter medium filling portion 65 is accelerated, so that the stability of the water purification performance can be improved. . Moreover, since the said raw material 95 presses uniformly the raw | natural water inlet end surface of the axial direction of the filter material filling part 65, the filtration length can be kept constant and the water quality of a certain level or more is maintained even in the raw water which passed any filtration channel | path. it can.

[Embodiment 4]
Further, as shown in FIG. 4, the pot-type water purifier has the raw water stored in the raw water tank 101 flows from the outer peripheral flow path 68 and circulates through the filter medium filling portion 65 through the outer filter 64, and passes through the inner filter 63. Each of a path that flows out to the collective flow path 69 through the second filter 92 and a path that flows into the collective flow path 69 via the inner filter 63 through the second filter 92. It can be configured to be filtered in a distributed form. In this case, as the second filter 92 provided on the end surface on the inlet side in the axial direction of the filter medium filling portion 65 in the opening 74, a filter having a lower water permeability than the outer filter 64 that is an inflow side filter is used. Further, instead of the second filter 92, a material 95 whose volume is expanded by water flow can be provided at the inlet end surface in the axial direction of the filter medium filling unit 65 on the downstream side of the opening 74. In addition to the flow path (a) in which the raw water supplied to the water purification cartridge 6 passes through the filter medium filling part 65 in the radial direction, a part of the raw water passes through the filter medium filling part 65 in the axial direction (b). Pass through. The raw water passing through the flow path (a) passes through the outer peripheral flow path 68 and passes through the filter medium filling section 65 from the water flow section 75 in the radial direction. On the other hand, the raw water passing through the flow path (b) does not pass through the water passage portion 65, passes through the outer peripheral flow path 68 toward the outlet 67, passes through the opening 74, and passes through the filter medium filling portion 65 in the axial direction.

  The water purification cartridge 6 according to the present invention may be integrated with the water purifier, or may have a structure in which only the water purification cartridge 6 can be replaced.

  The water purifier according to the present invention is used, for example, as a water pot for each household, and can be effectively used as a water purifier that can supply safe drinking water by a user.

60: Inflow port 61: Outer case 62: Inner case 63: Inner filter 64: Outer filter 65: Filter medium filling part 67: Outlet 68: Outer peripheral channel 69: Collective channel 72: Filling gap 73: Flow in the outer peripheral channel Outlet side space 74: Opening portion 92: Second filter 95: Material whose volume is expanded by passing water 96: First filter 101: Raw water tank 102: Water storage tank

Claims (6)

A water tank for storing purified water, an outer case having an outlet for flowing out the stored purified water, a raw water tank for storing raw water stored in the outer case, and a raw water tank stored in the outer case and communicating with the raw water tank With an inner case that flows in,
A cylindrical filter medium filling portion disposed between an outer filter disposed on the outer peripheral surface side and an inner filter disposed on the inner peripheral surface side, and a collective flow provided on the inner peripheral side of the inner filter A water purifier that is provided in the inner case and is purified by passing the filter water filling portion in a radial direction between the outer peripheral side of the outer filter and the collecting flow path,
An opening capable of passing water in the axial direction of the filter medium filling part is provided in the inner case, the raw water is guided from the raw water tank to the filter medium filling part through the opening, and the obtained purified water is guided to the water storage tank. Water purifier.   The water purifier according to claim 1, wherein the raw water passes through the filter material filling portion in a radially inward direction from an outer peripheral side of the outer filter toward the collecting flow path.   The water purifier according to claim 1 or 2, wherein a first filter capable of passing water is disposed in the opening.   Between the opening and the filter medium filling part, a second filter having a lower water permeability than the inflow side filter of the inner filter and the outer filter is disposed so as to be slidable in the axial direction of the filter medium filling part. The water purifier according to any one of claims 1 to 3.   The water purifier as described in any one of Claim 1 to 4 which comprises the raw material which a volume expand | swells by water flow between the said opening part and the said filter material filling part.   6. The filter according to claim 1, wherein a filtration length for passing and filtering the filter medium filling portion in the axial direction through the opening is longer than a filtration length for passing and filtering the filter medium filling portion in the radial direction. The water purifier according to one item.

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