CN115006894B

CN115006894B - Drain head with water purification function, water purification filter element and faucet device

Info

Publication number: CN115006894B
Application number: CN202210492817.XA
Authority: CN
Inventors: 高城壽雄; 白武史考
Original assignee: Japan Gaocheng Co ltd
Current assignee: Japan Gaocheng Co ltd
Filing date: 2018-03-29
Publication date: 2024-07-12
Anticipated expiration: 2038-03-29

Abstract

An object is to provide an improved water purification cartridge. [ solution ] A water purification cartridge (PC 1) is provided in a water purification cartridge capturing section (134) of a drain head (108) having a water purification function. The water purification cartridge (PC 1) includes a connection terminal portion (152), the connection terminal portion (152) being connected to a connection receiving portion (138) of the water purification cartridge capturing portion (134). The connection terminal portion (152) includes: a purified water outlet aperture (240); a first annular packing (s 1) located on the downstream side with respect to the purified water outlet hole (240); and a second annular packing (s 2) located on the upstream side with respect to the purified water outlet hole (240). The outer diameter (G1) of the first annular packing (s 1) is smaller than the outer diameter (G2) of the second annular packing (s 2).

Description

Drain head with water purification function, water purification filter element and faucet device

The application relates to a water drain head with water purifying function, a water purifying filter element and a faucet device, which are filed in 2018, 03 and 29, and are classified into the patent application of the application with the application number 201880092071.5.

Technical Field

The invention relates to a drainage head with a water purifying function, a water purifying filter element and a water tap device.

Background

JP 6186059B1 discloses a filter cartridge for use in a water purifier, which is replaceably accommodated in an accommodating portion of the water purifier. A filter cartridge for a water purifier has a buffer portion that is provided downstream of a purification material and shuts off a water hammer propagating from a flow path switching valve to the purification material.

List of references

Patent literature

Patent document 1: JP 6186059B1

Disclosure of Invention

Problems to be solved by the invention

The technique disclosed in JP 6186059B1 effectively prevents the purification material from being damaged. The technique disclosed in JP 6186059B1 is also effective in preventing adhesion between the water purifier and the water purification cartridge at the portion where the water purification cartridge is attached to the water purifier.

In view of the new findings, the inventors of the present invention have realized that the above-described filter cartridge has room for improvement. The present disclosure provides an improved drain head, an improved water purification cartridge and an improved faucet.

Solution to the problem

One aspect of the present disclosure is a water purification cartridge provided in a water purification cartridge capturing portion of a drain head having a water purification function, the water purification cartridge comprising: and a connection terminal portion connected to the connection receiving portion of the water purification cartridge capturing portion. The connection terminal portion includes: a purified water outlet hole; a first annular packing located on a downstream side with respect to the purified water outlet hole; and a second annular packing located on an upstream side with respect to the purified water outlet hole. The outer diameter G1 of the first annular packing is smaller than the outer diameter G2 of the second annular packing.

Another aspect of the present disclosure is a drain head having a water purifying function, the drain head comprising: a discharge port; a raw water flow path; a purified water flow path; a switching mechanism that switches between a raw water flow path and a purified water flow path; a water purification cartridge that produces purified water in a purified water flow path; a water purification cartridge capture section in which a water purification cartridge is disposed. The water purification cartridge capture section includes a connection receiving section connected to the water purification cartridge. The water purification cartridge includes a connection terminal portion connected to the connection receiving portion. The connection terminal portion includes: a purified water outlet hole; a first annular packing located on a downstream side with respect to the purified water outlet hole; and a second annular packing located on an upstream side with respect to the purified water outlet hole. The outer diameter of the first annular packing is smaller than the outer diameter of the second annular packing.

Yet another aspect of the present disclosure is a faucet assembly including a drain head having a water purification function.

Advantageous effects of the invention

By the novel construction described above, an improved water discharge head, an improved water purification cartridge and an improved faucet are obtained.

Drawings

Fig. 1 is a perspective view of a faucet assembly according to one embodiment.

Fig. 2 is a front view of a drain head in the faucet assembly shown in fig. 1.

Fig. 3 (a) and 3 (b) are cross-sectional views taken along line A-A in fig. 2. Fig. 3 (a) and 3 (b) differ from each other in the angular position of the water purification cartridge about its centerline.

Fig. 4 (a) is a cross-sectional view taken along the line a-a in fig. 4 (b), and fig. 4 (b) is a cross-sectional view taken along the line b-b in fig. 4 (a).

Fig. 5 (a) is a cross-sectional view taken along the line a-a in fig. 5 (b), and fig. 5 (b) is a cross-sectional view taken along the line b-b in fig. 5 (a).

Fig. 6 is a perspective view of a water purification cartridge attached to the faucet assembly shown in fig. 1.

Fig. 7 (a) is a side view of the water purification cartridge shown in fig. 6, fig. 7 (b) is a front view of the water purification cartridge as seen from the front side (downstream side), fig. 7 (c) is a cross-sectional view taken along a line c-c in fig. 7 (b), and fig. 7 (d) is a cross-sectional view taken along a line d-d in fig. 7 (b).

Fig. 8 is a partially enlarged view of fig. 7 (c).

Fig. 9 is a partially enlarged view of fig. 7 (d).

Fig. 10 is a partially enlarged view of fig. 3 (b).

Fig. 11 is a partially enlarged view of fig. 5 (b).

Fig. 12 is a partially enlarged view of fig. 11.

Fig. 13 is a partially enlarged view of fig. 2 in JP6186059B 1.

Detailed Description

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings as needed.

The term "radial direction" as used in this disclosure refers to the radial direction of a water purification cartridge attached in place, unless otherwise specified. The term "axial direction" as used in this disclosure refers to the axial direction of a water purification cartridge attached in place, unless otherwise specified.

The term "upstream side" as used in this disclosure refers to the upstream side in the water stream, and the term "downstream side" as used in this disclosure refers to the downstream side in the water stream, unless otherwise indicated. In the water purification cartridge, the upstream side and the downstream side are determined with respect to the axial direction. That is, in the water purification cartridge, the front end side in the axial direction is the downstream side, and the rear end side in the axial direction is the upstream side. Unless otherwise indicated, the downstream side is also referred to as the front side, and the upstream side is also referred to as the rear side.

[ Findings on which the present disclosure is based ]

Fig. 13 is a partially enlarged view of fig. 2 in JP6186059B 1. In the present embodiment, two O-rings 13 are provided on the outer peripheral surface of the cylindrical connecting portion 10a of the water purification cartridge. The outer diameter of the downstream O-ring 13a is equal to the outer diameter of the upstream O-ring 13 b. The outlet 10e is located at a position aligned with the purified water receiving port 11a of the cartridge supporting portion 11. The outlet 10e extends in the radial direction.

When the water purification cartridge is attached, the cylindrical connecting portion 10a is inserted into the cartridge support 11. During insertion, the downstream O-ring 13a rubs against the first edge 15 and further against the second edge 16. That is, during a single insertion, the downstream O-ring 13a is rubbed twice. Therefore, the downstream O-ring 13a may be damaged (problem 1 to be solved).

At the initial stage of insertion, only the downstream O-ring 13a is inside the cartridge support 11, while the upstream O-ring 13b has not yet reached the inside of the cartridge support 11. In this state, the center line z1 of the water purification cartridge tends to be inclined with respect to the cartridge supporting portion 11. Due to this inclination, the radially distal ends 17 and 18 of the wall portions on both sides of the downstream O-ring 13a are in contact with the inner surface of the cartridge support 11. The cylindrical connecting portion 10a is inserted into the cartridge support 11 with the radially distal ends 17 and 18 in contact with the inner surface. For this reason, the inner surface of the cartridge supporting portion 11 may be damaged (problem 2 to be solved).

If the outlet 10e is inclined with respect to the radial direction while ensuring the cross-sectional area of the outlet 10e, the length of the peripheral portion of the outlet 10e increases in the axial direction. An increase in length in the axial direction generally results in an increase in the overall length of the water purification cartridge and adversely affects the water purification performance (reducing the length of the water purification material). On the other hand, in a state where the outlet 10e extends in the radial direction, the purified water discharged radially outward is substantially in vertical contact with the surface of the member forming the flow path, and then flows to the downstream side (see an arrow in fig. 13). In this case, the resistance of the flow path may increase (problem 3 to be solved).

Scale, dirt, etc. may be deposited in the gap 19 between the radially distal end 17 of the wall portion on the upstream side of the downstream O-ring 13a and the member facing the radially distal end 17. These deposited substances may be scraped off by the downstream O-ring 13a when the water purification cartridge is detached, and may enter the purified water flow path from the purified water receiving port 11a (problem 4 to be solved).

The following embodiments can solve the newly discovered problems to be solved.

First embodiment

Fig. 1 is a perspective view of a faucet assembly 102 according to one embodiment. Faucet assembly 102 is mounted in a kitchen sink (not shown). Fig. 1 does not show visually unrecognizable parts, i.e. parts in the kitchen sink. Faucet assembly 102 may be installed not only in kitchen sinks, but also in, for example, wash basins and bathrooms.

Faucet assembly 102 includes a body portion 104, a lever handle 106, and a drain head 108 having a water purification function. Faucet assembly 102 is a so-called single-lever faucet. The temperature of the drain water can be adjusted by turning the lever handle 106 left and right. The displacement can be adjusted by turning lever handle 106 up and down. A valve mechanism capable of adjusting temperature and water discharge is housed inside the body portion 104. As the valve mechanism, a well-known valve mechanism is used.

Although not shown in the drawings, the faucet apparatus provided with the faucet assembly 102 includes a hot water inlet pipe and a water inlet pipe. The hot water inlet pipe is connected to a pipe extending from the water heater, for example. The water inlet pipe is connected to a conduit of, for example, a public water supply system without passing through the water heater.

Hot water is introduced into the hot water inlet pipe. Water is heated using a water heater. Unheated water is introduced into the water inlet pipe. The mixing ratio between the hot water and the water is regulated by a valve mechanism. By adjusting the mixing ratio, the temperature of the drain water can be adjusted. Hereinafter, hot water, non-hot water, and mixtures of hot water and non-hot water may be collectively referred to simply as "water".

The drain head 108 includes a water inlet portion 110, a switching portion 112, an operating portion 114, a water shape adjusting portion 116, a display portion 120, and a drain 122. In the present embodiment, the operation portion 114 is a button. The water inlet portion 110 also serves as a grip portion.

The water shape adjusting portion 116 may change the shape of the drain (water flow shape). The water-shaped adjusting portion 116 includes a water-shaped adjusting lever 118. The water flow shape can be changed by operating the water shape adjusting lever 118. A selection from two or more water flow shapes may be made by operating the water shape adjustment lever 118. When faucet assembly 102 is configured such that two water flow shapes are selectable, the selectable water flow shapes are preferably a direct flow shape and a shower flow shape. When faucet assembly 102 is configured such that three water flow shapes are selectable, the selectable water flow shapes are preferably a direct flow shape, and first and second shower flow shapes having different shower flow patterns. This embodiment adopts this configuration. The shower flow pattern is distinguished by, for example, the range, amount and water pressure of the shower flow.

The drain head 108 includes a raw water flow path and a purified water flow path. When the raw water flow path is selected, raw water is discharged from the discharge port 122. The state of discharging raw water is also referred to as "raw water discharge state". When the purified water flow path is selected, purified water is discharged from the discharge port 122. The state of discharging purified water is also referred to as "purified water discharge state".

The switching section 112 includes a switching mechanism that enables switching of drainage between purified water and raw water by operation of the operation section 114. The switching mechanism enables selection between a raw water discharge state and a purified water discharge state.

Fig. 2 is a front view of the drainage head 108. Fig. 3 (a) and 3 (b) are cross-sectional views taken along line A-A in fig. 2. The difference between fig. 3 (a) and fig. 3 (b) is the position of the water purification cartridge in the circumferential direction (the angular position of the water purification cartridge around its centerline). In fig. 3 (a) and 3 (b), the operating portion 114 is in the protruding position. Fig. 4 (a), fig. 4 (b), fig. 5 (a) and fig. 5 (b) are also cross-sectional views of the drain head 108. Fig. 4 (a) is a cross-sectional view taken along line A-A in fig. 4 (b). Fig. 4 (b) is a cross-sectional view taken along line b-b in fig. 4 (a). In fig. 4 (a) and 4 (b), the operating portion 114 is in the protruding position. Fig. 5 (a) is a cross-sectional view taken along line A-A in fig. 5 (b). Fig. 5 (b) is a cross-sectional view taken along line b-b in fig. 5 (a). In fig. 5 (a) and 5 (b), the operating portion 114 is in the depressed position. In each of fig. 4 (a), 4 (b), 5 (a) and 5 (b), a line seen behind the cross section is omitted.

The operation section 114 functions as a switch button. The operation portion 114 is pushed to switch between the flow paths. Switching between the raw water flow path and the purified water flow path is achieved every time the operation portion 114 is pressed. In other words, each time the operation portion 114 is pressed, switching between the raw water discharge state and the purified water discharge state is achieved. The switching mechanism includes a thrust lock mechanism operated by an alternating action. This thrust lock enables the operating portion 114 to function as a button. Each time the button 114 is pressed, the button 114 is shifted in position between the protruding position and the depressed position. Such switching mechanisms are known.

In the present embodiment, raw water is discharged when the button 114 is in the protruding position, and purified water is discharged when the button 114 is in the depressed position. Thus, fig. 3 (a), 3 (b), 4 (a) and 4 (b) show raw water discharge states, and fig. 5 (a) and 5 (b) show purified water discharge states. Alternatively, on the contrary, when the button 114 is in the protruding position, purified water may be discharged, and when the button 114 is in the depressed position, raw water may be discharged.

The drain head 108 includes a water purification cartridge PC1. The water purification cartridge PC1 is disposed inside the water inlet portion 110. The water inlet portion 110 includes an outer cylindrical portion 124. The water purification cartridge PC1 is disposed inside the outer cylindrical portion 124.

A raw water flow path WG is formed outside the water purification cartridge PC 1. A purified water flow path WJ is formed inside the water purification cartridge PC 1. In the raw water discharge state, after passing through the raw water flow path WG formed inside the switching mechanism, raw water having passed through the raw water flow path WG is discharged from the discharge port 122. On the other hand, in the purified water discharge state, raw water is filtered by the permeable portion 126 of the water purification cartridge PC1 to become purified water in the process of flowing into the water purification cartridge PC1 from the outside of the water purification cartridge PC 1. The purified water is discharged from the discharge port 122 after passing through the purified water flow path WJ inside the water purification cartridge PC1 and the purified water flow path WJ formed inside the switching mechanism. The permeable portion 126 is an example of a water purification function portion.

The switching section 112 of the drain head 108 includes a first valve 130 and a second valve 132. The switching of the drainage can be performed by the opening and closing operations of the two valves.

As shown in fig. 4 (b), the first valve 130 includes a valve seat 130a, a first valve body 130b, a ball retainer 130c, and an elastic body 130d. The first valve 130 is a ball valve. The first valve body 130b is a ball. The valve seat 130a is an opening edge of a circular hole. Ball 130b is held by ball holder 130 c. Ball retainer 130c opens downwardly. The elastic body 130d is disposed between the upper portion of the ball holder 130c and the ball 130 b. The elastic body 130d is a coil spring. The ball 130b is always biased toward the valve seat 130a by the elastic body 130d.

As shown in fig. 5 (b), the second valve 132 includes a valve seat 132a, a second valve body 132b, a ball retainer 132c, and an elastic body 132d. The second valve 132 is a ball valve. The second valve body 132b is a ball. Valve seat 132a is the opening edge of a circular aperture. The ball 132b is held by a ball holder 132 c. The ball retainer 132c opens downward. The elastic body 132d is disposed between the upper portion of the ball retainer 132c and the ball 132 b. The elastic body 132d is a coil spring. Ball 132b is always biased toward valve seat 132a by resilient body 132d.

Button 114 is coupled to ball retainer 130c and ball retainer 132c by inserting a push-lock mechanism between button 114 and ball retainers 130c and 132 c. Ball retainer 130c and ball retainer 132c move with button 114. Ball 130b moves with ball retainer 130c, and ball 132b moves with ball retainer 132 c. The valve seat 130a and the valve seat 132a are arranged side by side in a direction substantially perpendicular to the moving direction of the push button 114, and their positions are (slightly) different from each other in the moving direction.

Referring now to fig. 4 (a) and 4 (b), when the operating portion 114 is in the protruding position, the ball 132b is fitted in the valve seat 132a, thereby closing the second valve 132. At this time, the center of the ball 130b is located outside the center of the valve seat 130a, and thus the first valve 130 is opened. In this state, raw water is discharged. The second valve 132 is a purified water shut-off valve that closes the purified water flow path.

Referring now to fig. 5 (a) and 5 (b), when the operating portion 114 is in the depressed position, the ball 130b is fitted into the valve seat 130a, thereby closing the first valve 130. At this time, the center of the ball 132b is located outside the center of the valve seat 132a, and thus the second valve 132 is opened. In this state, purified water is discharged. The first valve 130 is a raw water shut-off valve that closes the raw water flow path.

The drain head 108 includes a water purification cartridge capture section 134. The water purification cartridge capturing section 134 includes a cylindrical hollow section 136 and a connection receiving section 138, and an intermediate section of the water purification cartridge PC1 is disposed in the cylindrical hollow section 136. A cylindrical hollow 136 is formed inside the outer cylindrical portion 124. The connection receiving portion 138 is located on the downstream side of the cylindrical hollow 136.

Fig. 6 is a perspective view of the water purification cartridge PC 1. Fig. 7 (a) is a side view of the water purification cartridge PC1, fig. 7 (b) is a front view of the water purification cartridge PC1, fig. 7 (c) is a cross-sectional view taken along a line c-c in fig. 7 (b), and fig. 7 (d) is a cross-sectional view taken along a line d-d in fig. 7 (b).

The water purification cartridge PC1 includes a middle portion 150, a connection terminal portion 152 provided at a front end of the middle portion 150, and a rear forming portion 154 provided at a rear end of the middle portion 150. The connection terminal portion 152 is coaxial with the intermediate portion 150. The post-forming portion 154 is coaxial with the intermediate portion 150.

The connection terminal portion 152 is provided on the downstream side of the intermediate portion 150. The inside of the connection terminal portion 152 is an empty space. The empty space serves as a purified water flow path WJ. That is, the connection terminal portion 152 includes the purified water flow path WJ inside thereof. The connection terminal portion 152 is made of resin. The connection terminal portion 152 is provided as a single member as a whole. The connection terminal portion 152 is integrally formed using resin. Alternatively, the connection terminal portion 152 may be formed by combining a plurality of separately formed members.

The middle portion 150 has a cylindrical shape. The middle portion 150 includes a permeable portion 151 that allows water to pass through the permeable portion 151. The middle portion 150 has a filtering function. The middle portion 150 includes an empty space inside thereof. The empty space serves as a purified water flow path WJ. The middle portion 150 may include, for example, an outer filter layer and an inner filter layer. The water purification material may be disposed between the outer filter layer and the inner filter layer. The water purification material contains, for example, activated carbon as a main component. For example, nonwoven fabrics are used to form the outer and inner filter layers. An antimicrobial ceramic material may be used to form the outer filter layer and/or the inner filter layer. Ion exchangers can be used to form the outer filter layer and/or the inner filter layer. Multiple outer filter layers may be provided. Multiple inner filter layers may be provided. The intermediate portion 150 of the present embodiment is an example of a water purifying function portion (a portion having a water purifying function). The intermediate portion 150 need not have a filtering function. The intermediate portion 150 may be a water impermeable cylindrical wall portion.

The water purification cartridge PC1 of the present embodiment includes a water purification material that can remove chlorine. Examples of purification materials include activated carbon.

The rear forming portion 154 encloses the rear side of the intermediate portion 150. On the other hand, the connection terminal portion 152 is water-permeable. The empty space inside the connection terminal portion 152 serves as a purified water flow path WJ. The purified water obtained after the raw water passes through the intermediate portion 150 flows through the connection terminal portion 152 and then flows into the switching portion 112.

Alternatively, the post-forming portion 154 may be water permeable. For example, raw water may flow into the intermediate portion 150 from a through hole provided in the rear forming portion 154 of the water purification cartridge PC 1. In this case, the intermediate portion 150 may be a water-impermeable cylindrical wall portion.

The connection terminal portion 152 includes a first cylindrical portion 160. The connection terminal portion 152 further includes a second cylindrical portion 162. The connection terminal portion 152 further includes a third cylindrical portion 164. The connection terminal portion 152 further includes a cylindrical holding portion 166. The first cylindrical portion 160 is located on the downstream side of the second cylindrical portion 162. The second cylindrical portion 162 is located on the downstream side of the third cylindrical portion 164. The third cylindrical portion 164 is located on the downstream side of the cylindrical holding portion 166. The second cylindrical portion 162 is located between the first cylindrical portion 160 and the third cylindrical portion 164. The first cylindrical portion 160 is coaxial with the second cylindrical portion 162. The second cylindrical portion 162 is coaxial with the third cylindrical portion 164. The third cylindrical portion 164 is coaxial with the cylindrical retaining portion 166. The centerline of the first cylindrical portion 160 coincides with the centerline z1 of the water purification cartridge PC 1. The centerline of the second cylindrical portion 162 coincides with the centerline z1 of the water purification cartridge PC 1. The centerline of the third cylindrical portion 164 coincides with the centerline z1 of the water purification cartridge PC 1. The center line of the cylindrical holding portion 166 coincides with the center line z1 of the water purification cartridge PC 1.

The connection terminal portion 152 is provided with a first annular filler s1 and a second annular filler s2. In this embodiment, the first annular packing s1 is an O-ring. In the present embodiment, the second annular packing s2 is an O-ring.

The connection terminal portion 152 includes a maximum outer diameter portion. In the present embodiment, the cylindrical holding portion 166 is the largest outer diameter portion of the connection terminal portion 152. The largest outer diameter portion (cylindrical holding portion 166) covers the downstream side end portion of the intermediate portion 150. The largest outer diameter portion (cylindrical holding portion 166) holds the downstream side end portion of the intermediate portion 150.

The outer diameter of the first cylindrical portion 160 is smaller than the outer diameter of the second cylindrical portion 162. The outer diameter of the second cylindrical portion 162 is smaller than the outer diameter of the third cylindrical portion 164. The outer diameter of the third cylindrical portion 164 is smaller than the outer diameter of the cylindrical retaining portion 166.

The connection terminal portion 152 is provided with a first annular filler s1 and a second annular filler s2. The first annular packing s1 is disposed on the first cylindrical portion 160. A second annular packing s2 is disposed on the second cylindrical portion 162.

Fig. 8 is a partially enlarged view of fig. 7 (c). Fig. 9 is a partially enlarged view of fig. 7 (d).

The first cylindrical portion 160 constitutes a downstream side end portion of the connection terminal portion 152. The first cylindrical portion 160 constitutes a downstream side end portion of the water purification cartridge PC 1.

The first cylindrical portion 160 constitutes a downstream side end portion of the water purification cartridge PC 1. The first cylindrical portion 160 constitutes a downstream side end portion of the connection terminal portion 152.

The connection terminal portion 152 includes a front end portion 170. In the present embodiment, the first cylindrical portion 160 is a front end portion 170. The front end portion 170 includes a first recess 172. A first groove 172 is formed on the outer peripheral surface of the front end portion 170 (first cylindrical portion 160). The first groove 172 is a circumferential groove. The first groove 172 is formed between the front wall portion 173a and the rear wall portion 173 b. The front wall portion 173a forms a side surface of the first groove 172 at the front side. The rear wall portion 173b forms a side surface of the first groove 172 at the rear side.

The first annular packing s1 is provided on the front end portion 170. The first annular packing s1 is disposed on the first groove 172.

The front end portion 170 has a front end surface 174. The front end surface 174 is the front end surface of the water purification cartridge PC 1. The front end surface 174 is a front end surface of the connection terminal portion 152. The front end surface 174 is a flat surface. The front end surface 174 extends in a radial direction. The front end surface 174 is annular (see fig. 7 (b)). The front end surface 174 is provided to extend in the entire circumferential direction. The center of the front end surface 174 is located on the centerline z1 of the water purification cartridge PC 1.

The front end portion 170 is watertight. The inner surface of the front end portion 170 faces the purified water flow path WJ. In this embodiment, the inner surface of the front end portion 170 includes an inner surface 194 described below. The outer surface of the front end portion 170 faces the raw water flow path WG. In this embodiment, the outer surface of the front end portion 170 includes a front end surface 174 and a recess 176. The outer surface of the front end portion 170 has a recess 176. The inner and outer surfaces of the front end portion 170 are separated from each other by a first annular filler s 1. The centerline of the front end portion 170 coincides with the centerline z1 of the water purification cartridge PC 1. The front end portion 170 is disposed at a position intersecting the center line z1 of the water purification cartridge PC 1.

The concave portion 176 opens toward the downstream side. The recess 176 opens forward in the axial direction. The concave portion 176 opens to the raw water flow path WG. The recess 176 is impermeable to water. The recess 176 has a circular cross section (see fig. 7 (b)). The front end surface 174 is provided in the circumferential direction (radially outward) of the concave portion 176. Recess 176 forms an empty space inside front end portion 170. The empty space formed by the recess 176 is cylindrical in shape. The empty space formed by the recess 176 is located radially inward of the first annular filler s 1. The empty space formed by the recess 176 is located radially inward of the first groove 172. The centerline of the front end surface 174 coincides with the centerline z1 of the water purification cartridge PC 1.

As shown in fig. 8 and 9, recess 176 has a side surface 178 and a bottom surface 180. The side surfaces 178 are circumferential surfaces. The side surface 178 is located radially inward of the first recess 172. The bottom surface 180 is a flat surface. The bottom surface 180 extends in a radial direction. The bottom surface 180 is rounded. The center of bottom surface 180 is located on centerline z1 of water purification cartridge PC 1.

The recess 176 forms an empty space located radially inward of the first groove 172. The recess 176 forms an empty space radially inward of the bottom surface 172 a.

The front end portion 170 includes a dividing wall 190. The partition wall 190 is impermeable to water. The partition wall 190 is located on the upstream side with respect to the front end surface 174. The partition wall 190 extends in the radial direction. The centerline of the partition wall 190 coincides with the centerline z1 of the water purification cartridge PC 1.

The partition wall 190 intersects the centerline z1 of the water purification cartridge PC 1. That is, the partition wall 190 is provided at a position intersecting the center line z1 of the water purification cartridge PC 1. In the present embodiment, the partition wall 190 intersects the center line z1 of the water purification cartridge PC1 at the center of the partition wall 190. Alternatively, the partition wall 190 may intersect the center line z1 of the water purification cartridge PC1 at a position other than the center. The partition wall 190 constitutes the bottom surface 180 of the recess 176. The bottom surface 180 is an outer surface 192 of the divider wall 190. As described above, the outer surface of the front end portion 170 includes the recess 176, and the bottom surface 180 of the recess 176 is the outer surface 192 of the partition wall 190.

The partition wall 190 serves as a partition between the inside and the outside of the water purification cartridge PC 1. The outer surface 192 of the partition wall 190 constitutes the outer surface of the water purification cartridge PC 1. The outer surface 192 faces the raw water flow path WG. The inner surface 194 of the partition wall 190 constitutes the inner surface of the water purification cartridge PC 1. The inner surface 194 faces the purified water flow path WJ.

The connection terminal portion 152 includes a coupling extension portion 200. The coupling extension 200 connects the first cylindrical portion 160 and the second cylindrical portion 162. As shown in fig. 6 and 7 (b), the plurality of coupling extending portions 200 are arranged at equal intervals in the circumferential direction. In the present embodiment, four coupling extension portions 200 are arranged at equal intervals in the circumferential direction. The coupling extension 200 extends in a direction inclined with respect to the centerline z1 of the water purification cartridge PC 1. The coupling extension portions 200 extend inward in the radial direction respectively as going further toward the downstream side. The coupling extension 200 connects the downstream side of the second cylindrical portion 162 and the upstream side of the first cylindrical portion 160.

The second cylindrical portion 162 includes a second recess 210. The second groove 210 is a circumferential groove. A second groove 210 is formed on the outer peripheral surface of the second cylindrical portion 162. A second annular packing s2 is disposed on the second groove 210. The second cylindrical portion 162 is hollow inside. The space inside the second cylindrical portion 162 serves as the purified water flow path WJ.

The second cylindrical portion 162 includes a downstream side end face 212. The downstream-side end face 212 is a flat surface. The downstream side end face 212 extends in the radial direction. The downstream side end face 212 is annular. The downstream side end face 212 is formed to extend in the entire circumferential direction.

The downstream side end face 212 may be continuously formed without a gap in the entire circumferential direction. Alternatively, the segments separated from each other by the coupling extension 200 and arranged in the circumferential direction may constitute the downstream-side end face 212. Alternatively, the downstream-side end face 212 may include a portion continuously formed without a gap in the circumferential direction, and a portion in which segments separated from each other by the coupling extension 200 are arranged in the circumferential direction. In the present embodiment, the downstream-side end face 212 is formed of four segments 214, which segments 214 are separated from each other by the coupling extension 200 and arranged in the circumferential direction.

Each coupling extension 200 includes an extended downstream surface 202. The extended downstream surface 202 is a surface that couples the downstream side of the extended portion 200. The extended downstream surface 202 has a configuration 1 in which the extended downstream surface 202 extends inward in the radial direction with further downstream side. The construction 1 achieves the beneficial effect 1. Advantageous effect 1 is that, when the connection terminal portion 152 of the water purification cartridge PC1 is inserted into the connection receiving portion 138 in the water purification cartridge capturing portion 134 of the drain head 108 and a portion of the connection receiving portion 138 is in contact with each of the extended downstream surfaces 202, the configuration 1 adjusts the position of the portion of the connection receiving portion 138 such that the center line of the connection terminal portion 152 coincides with the center line of the connection receiving portion 138, thereby preventing damage to the connection terminal portion 152 and the connection receiving portion 138 and improving the ease of handling of inserting the connection terminal portion 152 of the water purification cartridge PC1 into the connection receiving portion 138 in the water purification cartridge capturing portion 134 of the drain head 108.

The downstream-side end face 212 has a configuration 2 extending in the radial direction, that is, it is a surface perpendicular to the axial direction. When the connection terminal portion 152 of the water purification cartridge PC1 is inserted into the connection receiving portion 138, the drain head 108 may include a pressing portion to be pressed by the water purification cartridge PC 1. A drain head having a water purifying function, a water purifying cartridge, and a faucet device configured to exhibit a specific function when a pressing portion is pressed are contemplated. Examples of these specific functions include switching of a discharge state (raw water discharge state or purified water discharge state) and control of switching of a discharge state. In this case, the structure in which the surface of a part of the connection terminal portion of the pressing portion is extended in the radial direction (i.e., the surface is perpendicular to the axial direction) brings about the advantageous effect 2 that the pressing of the pressing portion can be performed accurately and/or smoothly. The configuration in which the downstream-side end face 212 extends in the radial direction brings about such advantageous effect 2.

Although the configurations 1 and 2 are provided in the same region in the axial direction within the connection terminal portion 152, both the configurations 1 and 2 can achieve the advantageous effects 1 and 2. Further, since both the configurations are provided in the same axial direction region of the connection terminal portion 152, it is possible to prevent the drain head having the water purifying function, the water purifying cartridge, and the faucet device from increasing in size, and also to increase the area of the region where the water purifying function portion can be provided.

The third cylindrical portion 164 includes a circumferential surface 220 and a stepped surface 222. The circumferential surface 220 is a circumferential surface. The centerline of the circumferential surface 220 coincides with the centerline z1 of the water purification cartridge PC 1. The step surface 222 is a flat surface. The step surface 222 extends in a radial direction. The step surface 222 is annular. The step surface 222 is formed to extend in the entire circumferential direction. The space inside the third cylindrical portion 164 serves as a purified water flow path WJ.

The cylindrical retaining portion 166 includes a circumferential surface 230 and a stepped surface 232. The circumferential surface 230 is a circumferential surface. The centerline of the circumferential surface 230 coincides with the centerline z1 of the water purification cartridge PC 1. The step surface 232 is a flat surface. The step surface 232 extends in a radial direction. The step surface 232 is annular. The step surface 232 is formed to extend in the entire circumferential direction. The step surface 232 connects the upstream side of the circumferential surface 220 and the downstream side of the circumferential surface 230.

The connection terminal portion 152 includes a purified water outlet hole 240. The first annular packing s1 is located on the downstream side with respect to the purified water outlet hole 240. The second annular packing s2 is located on the upstream side with respect to the purified water outlet hole 240. The purified water outlet aperture 240 is located between the first cylindrical portion 160 (front end portion 170) and the second cylindrical portion 162. The first cylindrical portion 160 is spaced apart from the second cylindrical portion 162 to form a gap as the purified water outlet hole 240. The purified water outlet holes 240 are respectively formed between the coupling extension portions 200 adjacent to each other in the circumferential direction.

Fig. 10 is a partially enlarged view of fig. 3 (b). Fig. 10 is an enlarged view of the vicinity of the connection terminal portion 152. As described above, the water purification cartridge capture section 134 of the drain head 108 includes a connection receiving section 138. The connection receiving portion 138 includes a first receiving cylindrical portion 254 and a second receiving cylindrical portion 256. The first receiving cylindrical portion 254 is located on the downstream side with respect to the second receiving cylindrical portion 256. The first receiving cylindrical portion 254 is located on the downstream side with respect to the second receiving cylindrical portion 256. The inner diameter of the first receiving cylindrical portion 254 is smaller than the inner diameter of the second receiving cylindrical portion 256. The outer diameter of the first receiving cylindrical portion 254 is smaller than the inner diameter of the second receiving cylindrical portion 256.

The connection terminal portion 152 is connected to the connection receiving portion 138 in a watertight manner. The first and second annular packing s1 and s2 ensure water tightness. The first cylindrical portion 160 (front end portion 170) of the connection terminal portion 152 is inserted into the inside of the first receiving cylindrical portion 254. The first annular packing s1 is in close contact with the inner peripheral surface of the first receiving cylindrical portion 254. The second cylindrical portion 162 of the connection terminal portion 152 is inserted inside the second receiving cylindrical portion 256. The second annular packing s2 is in close contact with the inner peripheral surface of the second receiving cylindrical portion 256. The end surface 258 of the second receiving cylindrical portion 256 abuts the step surface 222. By this abutment, the position of the water purification cartridge PC1 in the axial direction is set.

The connection receiving part 138 includes a purified water channel WJ1 constituting a part of the purified water flow path WJ and spaced apart from the raw water flow path WG to guide the purified water discharged from the purified water outlet hole 240 so as not to flow into the raw water flow path WG (see fig. 5 (b) and 10). The connection receiving part 138 further includes a raw water channel WG1, the raw water channel WG1 constituting a part of the raw water flow path WG and being spaced apart from the purified water channel WJ1 to guide raw water so as not to flow into the purified water channel WJ1 (see fig. 4 (a) and 10). The connection receiving part 138 includes a partition wall 260 (see fig. 10) forming a raw water passage WG1. A partition wall 260 is connected to a downstream side end portion of the first receiving cylindrical portion 254. The partition wall 260 is located on the downstream side of the recess 176. The partition wall 260 extends in the radial direction. The partition wall 260 forms a raw water passage WG1 between the partition wall 260 and the recess 176. The raw water channel WG1 forms a raw water flow path WG penetrating in the left-right direction (see fig. 4 (a)). The raw water passage WG1 guides raw water to the front end surface 174 of the water purification cartridge PC 1. The raw water passage WG1 guides raw water to the concave portion 176. The front end surface 174 faces the raw water flow path WG. The concave portion 176 faces the raw water flow path WG. The first and second annular packing s1 and s2 prevent the purified water flowing out of the purified water outlet hole 240 from flowing into the raw water flow path WG. The first annular packing s1 prevents water flowing out of the raw water passage WG1 from flowing into the purified water flow path WJ. The second annular packing s2 prevents water flowing out of the raw water flow path WG from flowing into the outlet of the purified water outlet hole 240. The second annular packing s2 prevents the purified water flowing out of the purified water outlet hole 240 from flowing into the raw water flow path WG.

A water permeable member 270 (see fig. 10) is provided on the downstream side of the recess 176. The water permeable member 270 is disposed to face the front end surface 174. The water permeable member 270 is disposed to face the raw water passage WG1. The water permeable member 270 is disposed between the raw water passage WG1 and the front end surface 174. The water permeable member 270 is provided between the raw water passage WG1 and the recess 176. In this embodiment, the water permeable member 270 is a mesh. The mesh is a metal mesh (net-shaped metal mesh). The water permeable member 270 does not obstruct the water flow in the raw water flow path WG. The water flowing through the raw water passage WG1 may collide with the front end surface 174. The water flowing through the raw water passage WG1 may flow into the grooves 176. The water permeable member 270 may prevent foreign objects from entering the raw water passage WG1.

Fig. 11 is a partially enlarged view of fig. 5 (b). The purified water outlet aperture 240 of the water purification cartridge PC1 includes an outlet opening edge 242. The outlet opening edge 242 includes a radially inner edge 242a and a radially outer edge 242b. The radially inner edge 242a is generally circular. The center of the radially inner edge 242a is located on the centerline z1 of the water purification cartridge PC 1. The radially outer edge 242b is generally circular. The radially outer edge 242b is centered on the centerline z1 of the water purification cartridge PC 1. Radially inner edge 242a is radially inward of radially outer edge 242b. The radially inner edge 242a is located on the downstream side relative to the radially outer edge 242b.

The broken line in fig. 11 represents a straight line L1 connecting the radially inner edge 242a and the radially outer edge 242 b. The two-dot chain line in fig. 11 shows a straight line L2 perpendicular to the straight line L1. The straight line L2 is inclined to extend outward in the radial direction as going further toward the downstream side. The double-headed arrow θ in fig. 11 indicates an angle formed between the center line z1 of the water purification cartridge PC1 and the straight line L2. This angle θ is also referred to as the opening tilt angle.

The double arrow S1 in fig. 11 indicates the radial direction opening width of the outlet opening edge 242 of the purified water outlet hole 240. The outlet opening edge 242 has a radial direction opening width S1. The radial direction opening width S1 is a distance in the radial direction between the radial inner edge 242a and the radial outer edge 242 b. The axial direction width of the outlet opening edge 242 is indicated by the double arrow V in fig. 11. The outlet opening edge 242 has an axial direction width V. The axial direction width V is the distance between the radially inner edge 242a and the radially outer edge 242b in the axial direction.

The purified water outlet hole 240 penetrates in the axial direction. In other words, the purified water outlet holes 240 are continuous in the axial direction. Fig. 12 is an enlarged cross-sectional view showing a portion of fig. 11 in an enlarged state. In a cross section taken along the center line z1, the purified water outlet hole 240 allows a straight line X extending in the axial direction to pass therethrough (see arrow y1 in fig. 12). In a cross section taken along the center line z1, the purified water outlet hole 240 has a straight line X1 located at the outermost side in the radial direction and a straight line X2 located at the innermost side in the radial direction as the straight line X. The straight lines X1 and X2 are positioned apart from each other in the radial direction. That is, there is a distance in the radial direction between the straight lines X1 and X2. The distance in the radial direction is also referred to as the front-rear penetration width. The purified water outlet hole 240 has a front-rear through width S2. In the present embodiment, the front-rear through width S2 is equal to the radial direction opening width S1.

In fig. 9, a double-headed arrow M1 indicates the width of the first groove 172. The groove width M1 (mm) is measured in the axial direction. In fig. 9, a double-headed arrow M2 indicates the width of the second groove 210. The groove width M2 (mm) is measured in the axial direction. Groove width M1 is greater than groove width M2.

In the present disclosure, the cross-sectional diameter of the first annular filler s1 is defined as a cross-sectional diameter D1 (mm), and the cross-sectional diameter of the second annular filler s2 is defined as a cross-sectional diameter D2 (mm). Note here that the cross-sectional diameter D1 is a diameter measured in a state where the first annular filler s1 exists alone. That is, the cross-sectional diameter D1 is measured in a state where no external force is applied to the first annular filler s 1. Likewise, the cross-sectional diameter D2 is a diameter measured in a state where the second annular filler s2 exists alone. That is, the cross-sectional diameter D2 is measured in a state where no external force is applied to the second annular filler s 2.

The cross-sectional diameter D1 is smaller than the cross-sectional diameter D2. The cross-sectional diameter D1 is smaller than the groove width M1. The cross-sectional diameter D2 is smaller than the groove width M2.

As shown in fig. 9, the groove width M1 is larger than the cross-sectional diameter D1 of the first annular filler s 1. In the first groove 172, the first annular filler s1 is disposed with a gap in the axial direction. In the first groove 172, the first annular filler s1 is movable in the axial direction.

The bottom surface 172a of the first groove 172 is a circumferential surface as a whole, and thus has a diameter. The diameter of the bottom surface 172a varies depending on the position in the axial direction. In the present embodiment, the bottom surface 172a has a smaller diameter on the downstream side than on the upstream side. In fig. 9, the first annular packing s1 is located at the most upstream side in the first groove 172. When the first annular packing s1 moves toward the downstream side in the first groove 172, the compression of the first annular packing s1 is relaxed. Also, when the first annular packing s1 moves toward the downstream side in the first groove 172, the inner diameter of the first annular packing s1 decreases, and the outer diameter of the first annular packing s1 also decreases. The movement of the first annular packing s1 to the downstream side facilitates the disassembly of the water purification cartridge PC 1.

As shown in fig. 9, the groove width M2 is larger than the cross-sectional diameter D2 of the second annular filler s 2. In the second groove 210, the first annular packing s1 is disposed with a gap in the axial direction. In the second groove 210, the second annular packing s2 is movable in the axial direction.

The bottom surface 210a of the second groove 210 is a circumferential surface as a whole, and thus has a diameter. The diameter of bottom surface 210a is greater than the diameter of bottom surface 172 a. The diameter of the bottom surface 210a does not vary depending on the position in the axial direction. The diameter of the bottom surface 210a is constant. In fig. 9, the second annular packing s2 is located at the most upstream side in the second groove 210. Even if the second annular packing s2 moves in the axial direction in the second groove 210, the degree of compression of the second annular packing s2 does not change.

In fig. 9, a double arrow G1 indicates the outer diameter of the first annular packing s 1. The outer diameter G1 is measured in a state where the first annular packing s1 is attached to the first groove 172 and the water purifying cartridge PC1 is not attached to the drain head 108. In other words, the outer diameter G1 is measured in a state where the water purification cartridge PC1 exists alone without being attached. In fig. 9, a double arrow G2 indicates the outer diameter of the second annular packing s 2. The outer diameter G2 is measured in a state where the second annular packing s2 is attached to the second groove 210 and the water purifying cartridge PC1 is not attached to the drain head 108. In other words, the outer diameter G2 is measured in a state where the water purification cartridge PC1 exists alone without being attached. In the case where the diameter of the bottom surface of the groove is changed as the bottom surface 172a of the first groove 172, the outer diameters G1 and G2 of the annular fillers are measured, respectively, in a state where the annular filler is disposed at the position where the outer diameter of the bottom surface of the groove is maximum.

The outer diameter G1 of the first annular packing s1 is smaller than the outer diameter G2 of the second annular packing s2.

In fig. 9, a double-headed arrow W1 represents a width obtained by subtracting the cross-sectional diameter D1 from the groove width M1. That is, w1=m1-D1. In fig. 9, a double-headed arrow W2 represents a width obtained by subtracting the cross-sectional diameter D2 from the groove width M2. I.e. w2=m2-D2. The first annular packing s1 and the second annular packing s2 in fig. 9 are in an attached state and thus compressed. Thus, strictly speaking, the cross-sectional width of the first annular filler s1 in fig. 9 is not the cross-sectional diameter D1. Likewise, the cross-sectional width of the second annular filler s2 in fig. 9 is not the cross-sectional diameter D2 either. From this point of view, it is not appropriate to display the widths W1 and W2 in fig. 9. However, for ease of understanding, fig. 9 shows widths W1 and W2. Also, the cross-sectional diameters D1 and D2 shown in fig. 9 are not suitable. However, for ease of understanding, fig. 9 shows cross-sectional diameters D1 and D2.

The width W1 is greater than the width W2. In other words, the difference (M1-D1) is greater than the difference (M2-D2).

Calcium, dirt, etc. contained in the water are deposited in the seal portion sealed with the annular packing, thereby causing adhesion of the annular packing. In addition, the annular fillers swell because they are always exposed to water, and this swelling also promotes adhesion. This adhesion makes it difficult to detach the water purification cartridge PC1 from the connection receiving portion 138. In addition, since a large force is required to disassemble the water purification cartridge PC1, a load is applied to the annular packing, so that deterioration of the annular packing can be accelerated.

As a result of setting the widths W1 and W2, the annular fillers s1 and s2 are easily deformed when the water purification cartridge PC1 is detached. Thus, the removability of the water purification cartridge PC1 is improved. In addition, the annular fillers s1 and s2 are movable in the grooves. Therefore, the portions adhered to each other are gradually separated, thereby improving the removability.

This embodiment produces the following advantageous effects.

[ Effect by G1< G2 ]

In the water purification cartridge PC1, the outer diameter G1 of the first annular packing s1 on the downstream side is smaller than the outer diameter G2 of the second annular packing s2 on the upstream side (see fig. 9).

With this configuration, the above-described problem 1 is solved. Since the outer diameter G1 of the first annular packing s1 on the downstream side is small, the first annular packing s1 is less likely to rub against the edge 259 (see fig. 10) of the second receiving cylindrical portion 256. Thus, unlike the case of the prior art (fig. 13), the first annular filler s1 is highly unlikely to be rubbed twice during a single insertion. Therefore, occurrence of damage to the first annular filler s1 on the downstream side (filler damage suppressing effect) is suppressed.

This construction also solves the above-mentioned problem 2. Since the outer diameter G1 of the first annular packing s1 is small, the outer diameter of the first cylindrical portion 160 provided with the first annular packing s1 is also small (see fig. 7 (a)). Therefore, even if the center line z1 of the water purification cartridge PC1 is inclined at the initial stage of insertion of the water purification cartridge PC1, the first cylindrical portion 160 is difficult to contact with the inner surface of the second receiving cylindrical portion 256 (see fig. 10). Therefore, occurrence of damage to the inner surface of the connection receiving portion 138 is suppressed (receiving portion damage suppressing effect).

Further, in the structure of G1< G2, the straight line L2 (fig. 11) indicating the orientation of the purified water outlet hole 240 can be easily inclined, and penetration of the purified water outlet hole 240 in the axial direction can be easily achieved. Thus, this configuration also helps solve problems 3 and 4.

If the outer diameter G1 of the first annular packing s1 is too small, the strength of the front end portion 170 of the water purification cartridge PC1 tends to decrease, and the water tightness achieved by the first annular packing s1 tends to deteriorate. From this point of view, the outer diameter G1 is preferably 7mm or more, more preferably 9mm or more, still more preferably 10mm or more. If the outer diameter G1 is too large, the size of the water purification cartridge PC1 and the size of the drain head 108 also increase, which tends to cause an increase in the size of the faucet. From this point of view, the outer diameter G1 is preferably less than or equal to 18mm, more preferably less than or equal to 15mm, and still more preferably less than or equal to 13mm. In the above embodiment, the outer diameter G1 is 11mm.

If the outer diameter G2 of the second annular packing s2 is too small, the flow rate of the purified water may be reduced. From this point of view, the outer diameter G2 is preferably 12mm or more, more preferably 14mm or more, and still more preferably 16mm or more. If the outer diameter G2 is too large, the size of the water purification cartridge PC1 and the size of the drain head 108 also increase, which tends to cause an increase in the size of the faucet. From this point of view, the outer diameter G2 is preferably less than or equal to 25mm, more preferably less than or equal to 23mm, and still more preferably less than or equal to 21mm. In the above embodiment, the outer diameter G2 is 18.8mm.

If the difference (G2-G1) is too small, the above-described filler damage suppressing effect and receiving portion damage suppressing effect are reduced, so that the effects of solving the problems 3 and 4 are also reduced. In addition, if the difference (G2-G1) is too small, the flow rate of the purified water may be lowered. From these viewpoints, the difference (G2-G1) is preferably greater than or equal to 3mm, more preferably greater than or equal to 4mm, and still more preferably greater than or equal to 6mm. If the difference (G2-G1) is too large, the size of the water purification cartridge PC1 and the size of the drain head 108 also increase, which tends to cause an increase in the size of the faucet. From this point of view, the difference (G2-G1) is preferably less than or equal to 15mm, more preferably less than or equal to 12mm, and still more preferably less than or equal to 10mm. In the above example, the difference (G2-G1) was 7.8mm.

If the ratio (G2/G1) is too small, the above-described filler damage suppressing effect and receiving portion damage suppressing effect are reduced, so that the effects of solving the problems 3 and 4 are also reduced. In addition, if the ratio (G2/G1) is too small, the flow rate of the purified water may be lowered. From this point of view, G2/G1 is preferably greater than or equal to 1.2mm, more preferably greater than or equal to 1.3mm, and still more preferably greater than or equal to 1.5mm. If the ratio (G2/G1) is too large, the size of the water purification cartridge PC1 and the size of the drain head 108 also increase, which tends to cause an increase in the size of the faucet. From this point of view, G2/G1 is preferably less than or equal to 2.5mm, more preferably less than or equal to 2.3mm, and still more preferably less than or equal to 1.9mm. In the above example, G2/G1 was 1.7mm.

[ Effect by opening Tilt Angle θ ]

As shown in fig. 11, the purified water outlet hole 240 (outlet opening edge 242) has an opening inclination angle θ.

The opening inclination angle θ solves the above-mentioned problem 3. By setting the opening inclination angle θ, an increase in the length of the purified water outlet hole 240 in the axial direction can be suppressed, and the purified water can pass through the purified water outlet hole 240 while flowing obliquely forward. Since the increase in the length of the purified water outlet hole 240 in the axial direction is suppressed, the increase in the total length of the water purification cartridge PC1 and the occurrence of the problem of sacrificing water purification performance (the length of the water purification material) are suppressed (axial direction length increase suppressing effect). In addition, since the purified water is discharged obliquely forward from the purified water outlet hole 240, the chance that the purified water may vertically strike the surface of the member constituting the flow path is reduced, and thus, the resistance of the flow path (flow path resistance reducing effect) can be reduced.

Further, the opening inclination angle θ solves the above-described problem 4. With the configuration shown in fig. 13, water cannot easily flow into the gap 19 between the radially distal end 17 of the wall portion on the upstream side of the downstream O-ring 13a and the member facing the radially distal end 17. This is because the gap 19 extends in the axial direction, while the direction of the water flow adjacent to the gap 19 is a substantially radial direction (see arrow in fig. 13). Thus, water tends to remain in the gap 19, so that scale, dirt, etc. tend to deposit in the gap 19. In contrast, in the embodiment shown in fig. 11, the opening inclination angle θ is smaller than 90 °, and the angle θ causes water to flow obliquely forward in the purified water outlet hole 240 (see arrow y2 in fig. 12). The water flowing obliquely forward includes an axially forward flowing component, and thus easily flows into the gap 280 between the rear wall portion 173b and the first receiving cylindrical portion 254. Therefore, water is less likely to remain in the gap 280, and scale, dirt, etc. are less likely to accumulate in the gap 280. As described above, if there are deposits in the gap 280, these deposits are likely to be scraped off by the first annular packing s1 when the water purification cartridge PC1 is detached, and enter the purified water flow path WJ from the purified water outlet hole 240. However, since water is unlikely to remain in the gap 280, the formation of deposits is suppressed, thereby suppressing the occurrence of a problem in that scraped-off deposits flow into the purified water flow path WJ (deposit formation suppressing effect).

If the opening inclination angle θ is too small, the length of the connection terminal portion 152 increases, so that the above-described axial direction length increase suppressing effect may decrease. From this viewpoint, the opening inclination angle θ is preferably 30 ° or more, more preferably 40 ° or more, and still more preferably 50 ° or more. If the opening inclination angle θ is too large, the flow path resistance reducing effect and the deposit formation suppressing effect are reduced. From this viewpoint, the opening inclination angle θ is preferably less than or equal to 80 °, more preferably less than or equal to 70 °, and still more preferably less than or equal to 60 °. In the present embodiment, the opening inclination angle θ is 56 °.

[ Effect produced by penetration of purified Water outlet holes in axial direction ]

As described above, the purified water outlet hole 240 penetrates in the axial direction (see arrow y1 in fig. 12). Accordingly, the water flow easily enters the gap 280, thereby further enhancing the deposit formation inhibition effect described above. In addition, the water passing through the purified water outlet hole 240 easily flows in the axial direction, thereby further enhancing the above-described flow path resistance reduction effect.

If the front-rear penetration width S2 (see fig. 12) is too small, the deposit formation suppressing effect and the flow path resistance reducing effect may be reduced. From this viewpoint, the front-rear through width S2 is preferably greater than or equal to 1.05mm, and more preferably greater than or equal to 1.1mm. If the front-rear penetration width S2 is excessively large, the outer diameter G2 of the second annular packing S2 also increases, resulting in an increase in the size of the water purification cartridge PC1 and the drain head 108. Further, the increase in the outer diameter G2 tends to deteriorate the water tightness achieved by the second annular packing s 2. From these viewpoints, the front-rear penetration width S2 is preferably less than or equal to 5mm, more preferably less than or equal to 3mm, and still more preferably less than or equal to 2mm. In this embodiment, the front-rear penetration width S2 is 1.1mm.

If the radial direction opening width S1 (see fig. 11) is too small, the deposit formation suppressing effect and the flow path resistance reducing effect may be reduced. From this point of view, the radial direction opening width S1 is preferably greater than or equal to 1.05mm, and more preferably greater than or equal to 1.1mm. If the radial direction opening width S1 is excessively large, the outer diameter G2 of the second annular packing S2 also increases, resulting in an increase in the size of the water purification cartridge PC1 and the drain head 108. Further, the increase in the outer diameter G2 tends to deteriorate the water tightness achieved by the second annular packing s 2. From these viewpoints, the radial direction opening width S1 is preferably less than or equal to 5mm, more preferably less than or equal to 3mm, and still more preferably less than or equal to 2mm. In the present embodiment, the radial direction opening width S1 is 1.1mm.

[ Effect produced by D1< D2 ]

As described above, the cross-sectional diameter D1 of the first annular filler s1 is smaller than the cross-sectional diameter D2 of the second annular filler s 2.

The annular packing having a small outer diameter has a problem in that it is difficult to easily perform a process of expanding the annular packing, and thus has low operability. Therefore, it is difficult to attach an annular packing having a small outer diameter to the groove. That is, the annular packing having a small outer diameter has low adhesion, and the annular packing having a large outer diameter has high adhesion.

Annular fillers having a small cross-sectional diameter are easily expandable and can therefore be easily attached to the groove. That is, the annular filler having a small cross-sectional diameter has high adhesion. On the other hand, the annular filler having a large cross-sectional diameter is hardly expandable and therefore has low adhesion.

The annular packing having a small cross-sectional diameter can achieve a small compression deformation amount and thus has low sealability. On the other hand, the annular packing having a large cross-sectional diameter can realize a large compression deformation amount, and thus has high sealability. In addition, even if there is a dimensional error in any surrounding member, such an annular packing having a large compression deformation amount easily ensures its sealability.

In the above embodiment, the first annular filler s1 on the downstream side may exhibit deteriorated adhesion due to the small outer diameter G1. Therefore, the cross-sectional diameter D1 is set smaller to improve adhesion.

On the other hand, the second annular filler s2 on the upstream side has high adhesion due to its large outer diameter G2, and its adhesion is high enough to allow some degradation. Therefore, the cross-sectional diameter D2 is set larger to improve the sealability.

From the viewpoint of sealability, the cross-sectional diameter D1 of the first annular filler s1 is preferably greater than or equal to 1.0mm, more preferably greater than or equal to 1.2mm, and still more preferably greater than or equal to 1.3mm. From the viewpoint of adhesion, the cross-sectional diameter D1 is preferably less than or equal to 2.0mm, more preferably less than or equal to 1.9mm, and still more preferably less than or equal to 1.7mm. In the above embodiment, the cross-sectional diameter D1 is 1.5mm.

From the viewpoint of sealability, the cross-sectional diameter D2 of the second annular filler s2 is preferably greater than or equal to 1.3mm, more preferably greater than or equal to 1.5mm, and still more preferably greater than or equal to 1.7mm. From the viewpoint of adhesion, the cross-sectional diameter D2 is preferably less than or equal to 3.0mm, more preferably less than or equal to 2.5mm, and still more preferably less than or equal to 2.3mm. In the above embodiment, the cross-sectional diameter D2 is 1.9mm.

If the cross-sectional diameter D2 is too small, the sealability of the second annular filler s2 may be deteriorated. If the cross-sectional diameter D1 is too large, the adhesion of the first annular filler s1 may deteriorate. That is, if the cross-sectional diameter D2 is too small or the cross-sectional diameter D1 is too large, the overall performance in view of water tightness and adhesion may deteriorate. From this point of view, the difference (D2-D1) is preferably greater than or equal to 0.1mm, more preferably greater than or equal to 0.2mm, and still more preferably greater than or equal to 0.3mm. If the cross-sectional diameter D2 is too large, the adhesion of the second annular filler s2 may deteriorate. If the cross-sectional diameter D1 is too small, the sealability of the first annular filler s1 may be deteriorated. That is, if the cross-sectional diameter D2 is too large or the cross-sectional diameter D1 is too small, the overall performance in view of water tightness and adhesion may deteriorate. From this point of view, the difference (D2-D1) is preferably less than or equal to 1.0mm, more preferably less than or equal to 0.8mm, and still more preferably less than or equal to 0.6mm. In the above example, the difference (D2-D1) was 0.4mm.

If the cross-sectional diameter D2 is too small or the cross-sectional diameter D1 is too large, the overall performance in view of water tightness and adhesion may deteriorate. From this point of view, the ratio (D2/D1) is preferably greater than or equal to 1.05, more preferably greater than or equal to 1.1, and still more preferably greater than or equal to 1.2. If the cross-sectional diameter D2 is too large or the cross-sectional diameter D1 is too small, the overall performance in view of water tightness and adhesion is deteriorated. From this point of view, the ratio (D2/D1) is preferably less than or equal to 2.0, more preferably less than or equal to 1.5, and still more preferably less than or equal to 1.3. In the above example, the ratio (D2/D1) was 1.27.

[ Effect by W1> W2 ]

As described above, the width W1 is larger than the width W2. In other words, the difference (M1-D1) is greater than the difference (M2-D2) (see FIG. 9).

The second annular packing s2 on the upstream side has a large cross-sectional diameter D2, and is therefore easily deformed when the water purification cartridge PC1 is disassembled. Therefore, the second annular packing s2 is unlikely to be a factor that causes deterioration of removability. On the other hand, the first annular packing s1 on the downstream side has a small cross-sectional diameter D1, and is therefore not easily deformed when the water purification cartridge PC1 is disassembled. Therefore, the first annular packing s1 is likely to be a factor that causes deterioration of removability. Therefore, the width W1 of the first annular packing s1, which is not easily deformed, is set to be larger than the width W2 to improve the removability. If both the widths W1 and W2 are set to be large, the length of the connection terminal portion 152 in the axial direction increases, which results in an increase in the length of the water purification cartridge PC1 or a deterioration in the water purification performance (decrease in the length of the water purification material). By making the width W2 smaller than the width W1, the occurrence of these inconveniences can be suppressed.

From the viewpoint of removability, the width W1 is preferably greater than or equal to 0.7mm, more preferably greater than or equal to 0.9mm, and still more preferably greater than or equal to 1.1mm. From the viewpoint of suppressing an increase in the length of the water purification cartridge PC1 and deterioration of the water purification performance, the width W1 is preferably less than or equal to 2.0mm, more preferably less than or equal to 1.8mm, and still more preferably less than or equal to 1.5mm. In this embodiment, the width W1 is 1.3mm.

From the viewpoint of removability, the width W2 is preferably greater than or equal to 0.2mm, more preferably greater than or equal to 0.3mm, and still more preferably greater than or equal to 0.4mm. From the viewpoint of suppressing an increase in the length of the water purification cartridge PC1 and deterioration of the water purification performance, the width W2 is preferably less than or equal to 1.5mm, more preferably less than or equal to 1.1mm, and still more preferably less than or equal to 0.8mm. In this embodiment, the width W2 is 0.6mm.

From the viewpoint of avoiding too small a width W1 and too large a width W2, the difference (W1-W2) is preferably greater than or equal to 0.1mm, more preferably greater than or equal to 0.3mm, and still more preferably greater than or equal to 0.5mm. From the standpoint of avoiding an excessively large width W1 and an excessively small width W2, the difference (W1-W2) is preferably less than or equal to 1.5mm, more preferably less than or equal to 1.2mm, and still more preferably less than or equal to 0.8mm. In this example, the difference (W1-W2) was 0.7mm.

From the standpoint of avoiding too small a width W2 and too large a width W1, the ratio (W2/W1) is preferably greater than or equal to 0.2, more preferably greater than or equal to 0.3, and still more preferably greater than or equal to 0.4. From the standpoint of avoiding an excessively large width W2 and an excessively small width W1, the ratio (W2/W1) is preferably less than or equal to 0.9, more preferably less than or equal to 0.8, and still more preferably less than or equal to 0.6. In this embodiment, the ratio (W2/W1) was 0.46.

[ Effect by recesses ]

As described above, the outer surface of the front end portion 170 of the water purification cartridge PC1 includes the recess 176 (see fig. 9).

Since the first annular packing s1 is placed in the front end portion 170, the front end portion 170 needs to have a predetermined length in the axial direction. The first groove 172 is also provided in the front end portion 170, and the dimensional accuracy of the bottom surface 172a of the first groove 172 is an important factor for improving the sealing achieved by the first annular packing s1.

If the inside of the filler placement portion (the portion where the first annular filler s1 is placed) having a predetermined length in the axial direction is solid without empty space, a large sink mark (shrinkage at the time of molding) is caused during molding. This can occur whether the resin used is a thermoplastic resin or a thermosetting resin. For example, in injection molding of thermoplastic resins, sink marks may be caused during cooling. For example, in the molding of thermosetting resins, sink marks may be caused during the curing of the resin. In addition, if the inside of the filler placement section having a predetermined length in the axial direction is solid without empty space, this causes a large dimensional change between the respective products.

By providing an empty space radially inside the filler placement portion, the formation of sink marks is suppressed, and dimensional change is also suppressed. Accordingly, the dimensional accuracy of the bottom surface 172a of the first groove 172 is improved, and the sealing achieved by the first annular filler s1 is improved.

As in the water purification cartridge PC1, a recess radially inside the filler placement portion may be provided on the outer surface of the front end portion 170. Alternatively, a recess may be provided on the inner surface of the front end portion 170.

When a recess is provided on the inner surface of the front end portion 170, the recess faces the purified water flow path WJ. Purified water may flow into and remain in the recess. In view of hygiene, it is not preferable that purified water in which chlorine has been removed remains in the concave portion. To solve this problem, in the present embodiment, a concave portion 176 is provided on the outer surface of the front end portion 170. The concave portion 176 faces the raw water flow path WG. The water remaining in the recess 176 is raw water. This embodiment avoids the occurrence of a case in which purified water from which chlorine has been removed remains in the concave portion.

Further, when a recess is provided on the inner surface of the front end portion 170, the shape of the flow path radially inside the purified water outlet hole 240 is complicated by the recess, so that turbulence may be generated. Due to such turbulence, the flow rate in the purified water outlet hole 240 can be reduced. Since the purified water passes through the water purification function portion of the water purification cartridge PC1, the water pressure in the purified water flow path WJ is lower than the water pressure in the raw water flow path WG. When the flow rate in the purified water outlet hole 240 is reduced due to the turbulence, the flow rate in the purified water flow path WJ is further reduced. In the present embodiment, the occurrence of this is avoided.

In fig. 9, a double-headed arrow T represents the shortest distance between the bottom surface 172a of the first groove 172 and the groove 176 (side surface 178). If the shortest distance T is too small, deterioration of sealability may be caused due to strength decrease and deformation of the bottom surface 172 a. From this viewpoint, the shortest distance T is preferably greater than or equal to 0.5mm, more preferably greater than or equal to 1.0mm, and still more preferably greater than or equal to 1.2mm. If the shortest distance T is too large, the sink mark becomes large. From this point of view, the shortest distance T is preferably less than or equal to 3.0mm, more preferably less than or equal to 2.0mm, and still more preferably less than or equal to 1.8mm. In the above embodiment, the shortest distance T is 1.5mm.

During switching between the raw water discharge state and the purified water discharge state, the first valve 130 (raw water shut-off valve) or the second valve 132 (purified water shut-off valve) is instantaneously closed. When the raw water discharge state is switched to the purified water discharge state, the raw water flow path WG having a high water pressure is instantaneously cut off. Therefore, a water hammer or high water pressure is transmitted from the first valve 130 (raw water shut-off valve) to the upstream side of the raw water flow path WG.

As described above, the outer surface of the front end portion 170 faces the raw water flow path WG (see fig. 11). A water hammer or high water pressure acts on the front end portion 170, and this may cause the water purification cartridge PC1 to vibrate. Every time the water discharge is switched, the water purification cartridge PC1 is vibrated. Such vibration can suppress the occurrence of adhesion of the fillers s1 and s 2.

As described above, the partition wall 190 is provided in the front end portion 170. The partition wall 190 is impermeable to water. The partition wall 190 is provided at a position where it intersects the center line z1 of the water purification cartridge PC 1. By this configuration, the water hammer or high water pressure acting on the partition wall 190 can effectively vibrate the water purification cartridge PC 1. Therefore, the occurrence of adhesion of the fillers s1 and s2 can be effectively suppressed.

The partition wall 190 preferably extends in a radial direction. However, the partition wall 190 does not have to extend in the radial direction. In the above-described embodiment, the partition wall 190 extends in the radial direction. By this configuration, the water hammer or high water pressure acting on the partition wall 190 is effectively converted into a force applied in the axial direction. The force applied in the axial direction can effectively vibrate the water purification cartridge PC1 in the axial direction (front-rear direction).

Although the centerline of the partition wall 190 preferably coincides with the centerline z1 of the water purification cartridge PC1, the centerline of the partition wall 190 does not necessarily coincide with the centerline z1 of the water purification cartridge PC1. In the above embodiment, the center line of the partition wall 190 coincides with the center line z1 of the water purification cartridge PC1. Accordingly, the pressure acting on the partition wall 190 can be effectively transmitted to the water purification cartridge PC1.

As described above, the recess 176 is provided on the outer surface of the front end portion 170. The recess 176 may more effectively catch water hammer or high water pressure than a flat surface or the like without the recess. The recess 176 may accelerate vibration of the water purification cartridge PC 1. Therefore, the occurrence of adhesion of the fillers s1 and s2 can be effectively suppressed.

The raw water passage WG1 extends in a radial direction. By providing the concave portion 176, water flowing through the raw water passage WG1 extending in the radial direction can be effectively captured. The recess 176 can effectively catch a water hammer or high water pressure in the raw water passage WG1 extending in the radial direction.

As shown in fig. 8, recess 176 has a side surface 178 and a bottom surface 180. The bottom surface 180 extends in a radial direction. Therefore, a water hammer or high water pressure acting on the bottom surface 180 may cause vibration in the axial direction. The side surfaces 178 extend in the axial direction. Therefore, a water hammer or high water pressure acting on the side surface 178 may cause vibration in the radial direction. Vibrations in both directions can effectively suppress the occurrence of adhesion of the fillers s1 and s 2.

In the above embodiment, the annular fillers s1 and s2 are O-rings. Each O-ring has a circular cross-section. Each annular packing need not have a circular cross-section. For example, each annular packing may be an O-ring having an elliptical cross-section. The annular packing is not limited to O-rings. Moreover, there is no limitation on the cross-sectional shape of the annular filler. Each annular packing may be, for example, a quadrangular packing having a quadrangular cross section, a U-shaped packing having a U-shaped cross section, a V-shaped packing having a V-shaped cross section, a Y-shaped packing having a Y-shaped cross section, and an X-shaped packing having an X-shaped cross section. From the standpoint of ensuring tightness (water tightness) and suppressing occurrence of the integration of the annular packing adhering to the water purification cartridge and other surrounding members, an O-ring is preferable, and an O-ring having a circular cross section is particularly preferable as the annular packing.

Examples of the material of the connection terminal portion 152 include resin and metal. When the material is a metal, the connection terminal portion 152 is preferably manufactured by sintering, casting or forging from the viewpoint of cost. From the viewpoint of cost, the resin is better than the metal. Examples of the resin include thermoplastic resins and thermosetting resins. Thermoplastic resins that are easy to form are preferred. From the viewpoint of formability, polyoxymethylene resin (POM), polyphenylene sulfide resin (PPS), acrylonitrile butadiene styrene resin (ABS) and polypropylene resin (PP) are more preferable. From the viewpoints of formability and cost, acrylonitrile Butadiene Styrene (ABS) and polypropylene (PP) are particularly preferable.

Examples of the material of the front end portion 170 include resin and metal. When the material is metal, the front end portion 170 is preferably manufactured by sintering, casting or forging from the viewpoint of cost. From the viewpoint of cost, the resin is better than the metal. Examples of the resin include thermoplastic resins and thermosetting resins. Thermoplastic resins that are easy to form are preferred. From the viewpoint of formability, polyoxymethylene resin (POM), polyphenylene sulfide resin (PPS), acrylonitrile butadiene styrene resin (ABS) and polypropylene resin (PP) are more preferable. From the viewpoints of formability and cost, acrylonitrile Butadiene Styrene (ABS) and polypropylene (PP) are particularly preferable.

In the water purification cartridge PC1 of the above-described embodiment, the intermediate portion 150 includes the water permeable portion 151, and the water permeable portion 151 allows water to pass through the water permeable portion 151 from the outer peripheral surface of the water purification cartridge PC1 to the inside of the water purification cartridge PC1. However, the configuration of the intermediate portion 150 is not limited to such an embodiment. For example, the outer peripheral surface of the water purification cartridge PC1 may be formed of an impermeable outer peripheral wall, and a water permeable portion may be provided inside the outer peripheral wall. In this case, the water purification cartridge PC1 may allow water to flow into the water purification cartridge PC1 from the rear end of the water purification cartridge PC1. For example, an inlet may be provided at the upstream side end (rear end) of the water purification cartridge PC1. The inlet may be provided in the rear forming portion 154. The water may reach the connection terminal portion 152 after flowing into the water purification cartridge PC1 from the inlet and then passing through the water permeable portion.

In the above-described embodiment, the water purification function portion is a water permeable portion, and the purified water is produced by passing raw water through the water permeable portion. As described above, the water permeable portion is only an example of the water purifying function portion. Alternatively, the purified water may be produced without passing the raw water through the water permeable portion. For example, the water purification cartridge may include a metal material that releases metal ions having a sterilizing effect, an antibacterial effect, a sterilizing effect, or a bacterial growth inhibiting effect, and such a metal material may also be used to produce purified water.

The term "purified water" as used in the present disclosure means a concept that encompasses the following generation of water (1) and (2).

(1) The produced water is obtained by removing substances, ions, and the like contained in water by using an absorbent, a filtration membrane, and the like.

(2) Produced water having advantageous properties imparted by adding metal ions, electrons, substances, and the like to water, for example, produced water obtained by adding metal ions to water to impart a sterilizing effect, and the like.

In particular, the term "purified water" as used in this disclosure is meant to encompass the concept of water generated using function a and/or function B below. In other words, the term "water purification function portion" as used in the present disclosure means a concept covering a function portion having the following function a and/or function B.

[ Function A ]

Function a is at least one function selected from the group consisting of the following functions A1, A2, A3, A4, and A5.

A1: the function of removing substances contained in water by adsorption using an adsorbent such as activated carbon.

A2: a filter material is used to filter out substances contained in water. The function A2 is preferably a function of filtering out substances contained in water using a filtration membrane (e.g., a reverse osmosis membrane, an ultrafiltration membrane, a microfiltration membrane, a nanofiltration membrane, or a porous hollow fiber membrane) as a filtration material.

A3: the functions of metal ions and the like contained in water are removed by collecting them using ion exchange resins and the like.

A4: and releasing the metal ions having a sterilizing effect, an antibacterial effect, a bactericidal effect and/or a bacterial growth inhibiting effect from the metal material.

A5: the function of generating active oxygen by releasing metal ions from a metal material and allowing oxygen in water to acquire electrons generated due to the release of the metal ions.

Examples of substances in water to be removed for purification include chlorine, volatile organic compounds, agrochemicals, mildewing substances and heavy metals. Preferably, one or more selected from the group consisting of chlorine, volatile organic compounds, agrochemicals, mold substances and heavy metals are removed.

The term "chlorine" as used in this disclosure means a concept that encompasses residual chlorine contained in tap water. Residual chlorine includes free residual chlorine and bound residual chlorine. Examples of free residual chlorine include hypochlorous acid and hypochlorite ions. Examples of bound residual chlorine include monochloramine, dichloramine and trichloramine. This residual chlorine is generated when chlorine is dissolved in water to disinfect the water.

Examples of volatile organic compounds include chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1-trichloroethane and total trihalomethanes. Preferably, one or more selected from the group consisting of chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1-trichloroethane and total trihalomethanes are removed.

Examples of agrochemicals include 2-chloro-4, 6-bis (ethylamino) -1,3, 5-triazine. Preferably 2-chloro-4, 6-bis (ethylamino) -1,3, 5-triazine is removed.

Examples of the mold-flavor substances include 2-methyl isobornyl alcohol, tussilagin and phenol. Preferably, one or more selected from the group consisting of 2-methyl isobornyl alcohol, skatole and phenol are removed.

Examples of heavy metals include lead, mercury, copper, arsenic, and cadmium. Preferably one or more selected from the group consisting of lead, mercury, copper, arsenic and cadmium are removed.

Examples of the metal ions in function A4 include zinc ions and silver ions. Preferably, one or more types of ions selected from the group consisting of zinc ions and silver ions are released.

Examples of bacteria targeted by function A4 include colonic bacilli and staphylococci, as well as miscellaneous bacteria defined as (contained in) normal bacteria. Preferably, one or more types of these bacteria are subjected to a sterilizing action, an antibacterial action, a bactericidal action or a bacterial growth inhibiting action.

The active oxygen in function A5 can degrade organic substances such as bacteria. Examples of bacteria include colonic bacilli and staphylococci, as well as miscellaneous bacteria defined as (contained in) normal bacteria. Preferably, one or more types of these bacteria are degraded.

The water purification cartridge having the function A1 is preferable from the viewpoint of being able to effectively remove chlorine and harmful substances and allowing the manufacturing cost of the water purification cartridge to be reduced. In addition to function A1, the water purification cartridge may have one or more functions selected from functions A2, A3, A4 and A5.

[ Function B ]

Function B is a function of purifying water using the filter material and/or media defined in "(vi) water purifier" in appendix 2 (about clause 2) of miscellaneous product quality label specifications (revision date: 3, 30, 2017/validation date: 4, 2017). In other words, the water purification cartridge preferably includes a water purification function portion that purifies water using the filtration material and/or media defined in "(vi) water purifier" in appendix 2 (regarding clause 2) with miscellaneous product quality label specifications (revision date: 3/validation date: 4/1 in 2017).

The water purification function portion having the function a and/or the function B may constitute a part of the purified water flow path, or alternatively, may be provided in the purified water flow path, or further alternatively, may be provided in a tank portion communicating with the purified water flow path.

The water purification cartridge may be of an integral type in which all of the components constituting the water purification cartridge are integrated so as not to be disassembled, or of a composite type in which the water purification cartridge is composed of a plurality of detachable components.

The composite water purification cartridge can include, for example, an adapter member and a cartridge body. The adapter member may or may not be connected to the cartridge body. In other words, the adapter member may or may not be attached to the cartridge body. When the adapter member is attachable to the cartridge body, the adapter member is removably or non-removably attached to the cartridge body. The function of the adapter member is not limited. For example, the switching member may have a function of affecting operability of the operation portion (button) 114.

The configuration of the adapter member and the cartridge body is not limited. Examples of this configuration may include the following configurations B1 to B4.

B1: a configuration in which the water purification cartridge is attached to the cartridge capturing portion in a state in which the adapter member is attached to the cartridge body.

B2: a construction in which the adapter member is first attached to the cartridge capture portion, and then the cartridge body is attached to the adapter member.

B3: a construction in which the adapter member is attached to one portion of the cartridge capture portion and then the cartridge body is attached to another portion of the cartridge capture portion.

B4: a construction in which the adapter member is first attached to one portion of the cartridge capture portion, and then the cartridge body is attached to the other portion of the adapter member and the cartridge capture portion.

In the above-described configurations B1 to B4, the adapting member may be detachably attached to the cartridge capturing portion, or alternatively, may be non-detachably attached to the cartridge capturing portion. Preferably, the adapter member is removably attached to the cartridge capture portion.

With respect to the above embodiments, the following items are disclosed.

[ Clause 1] a water purification cartridge disposed in a water purification cartridge capture section of a drain head having a water purification function, the water purification cartridge comprising:

A connection terminal portion connected to the connection receiving portion of the water purification cartridge capturing portion,

Wherein the connection terminal portion includes: a purified water outlet hole; a first annular packing located on a downstream side with respect to the purified water outlet hole; and a second annular packing located on an upstream side with respect to the purified water outlet hole, and

The outer diameter G1 of the first annular packing is smaller than the outer diameter G2 of the second annular packing.

[ Item 2] the water purification cartridge according to item 1,

Wherein the purified water outlet aperture comprises an outlet opening edge,

The outlet opening edge comprises a radially inner edge and a radially outer edge, and

In a cross section taken along the center line of the water purification cartridge, when a straight line passing through the radially inner edge and the radially outer edge is defined as L1, and a straight line perpendicular to the straight line L1 is defined as L2, the straight line L2 is inclined to extend radially outward as going further toward the downstream side.

[ Item 3] the water purification cartridge according to item 1 or 2,

Wherein the purified water outlet hole is perforated in the axial direction.

[ Item 4] the water purification cartridge according to any one of items 1 to 3,

Wherein the cross-sectional diameter D1 of the first annular packing is smaller than the cross-sectional diameter D2 of the second annular packing.

[ Item 5] the water purification cartridge according to item 4,

Wherein the connection terminal portion includes: a first groove, on which a first annular filler is provided; and a second groove, the second groove is provided with a second annular filler,

The width M1 of the first groove is greater than the cross-sectional diameter D1,

The width M2 of the second groove is larger than the cross-sectional diameter D2, and

The difference (M1-D1) is greater than the difference (M2-D2).

[ Item 6] the water purification cartridge according to any one of items 1 to 5,

Wherein the water purification filter element comprises a purification material capable of removing chlorine,

The connection terminal portion includes a water-impermeable front end portion, and a first annular packing is provided on the front end portion,

The front end portion is made of a resin,

The inner surface of the front end portion faces the purified water flow path,

The outer surface of the front end portion faces the raw water flow path,

The outer surface of the front end portion includes a recess, and

There is an empty space formed by the recess radially inside the first annular filler.

[ Item 7] a water discharge head having a water purifying function, the water discharge head comprising:

A discharge port;

A raw water flow path;

A purified water flow path;

a switching mechanism that switches between a raw water flow path and a purified water flow path;

a water purification cartridge that produces purified water in a purified water flow path; and

A water purification cartridge capturing section in which a water purification cartridge is provided,

Wherein the water purification cartridge capture portion includes a connection receiving portion connected to the water purification cartridge,

The water purification cartridge includes a connection terminal portion connected to the connection receiving portion,

The connection terminal portion includes: a purified water outlet hole; a first annular packing located on a downstream side with respect to the purified water outlet hole; and a second annular packing located on an upstream side with respect to the purified water outlet hole, and

The outer diameter of the first annular packing is smaller than the outer diameter of the second annular packing.

[ Item 8] a faucet assembly, comprising:

The water discharge head having a water purifying function according to item 7.

In this disclosure, inventions other than those included in the claims (including the independent claims) are also described. The forms, members, constructions, and combinations thereof described in the claims and embodiments of the present disclosure should be treated as inventions based on their respective functions and effects.

The forms, members, configurations, etc. shown in the above-described embodiments are each independently applicable to all inventions described in the present disclosure, including the inventions set forth in the claims of the present disclosure, even if not each form, member, or configuration described in the embodiments is used.

List of reference numbers

102. Water tap device

104. Body portion

106. Lever handle

108. Drainage head

110. Water inlet portion

114. Operation part

134. Water purification filter element capturing part

138. Connection receiving portion

152. Connection terminal portion

154. Post-forming portion

160. A first cylindrical portion

162. A second cylindrical portion

164. A third cylindrical portion

172. First groove

174. Front end surface

176. Concave part

178. Side surfaces of the recess

180. Bottom surface of recess

190. Partition wall

210. Second groove

240. Purified water outlet hole

242. Edge of outlet opening

254. A first receiving cylindrical portion

256. A second receiving cylindrical portion

PC1 water purifying filter element

S1 first annular filler

S2 second annular packing

WJ purified water flow path

WJ1 purified water channel

WG raw water flow path

WG1 raw water channel

Claims

1. A water purification cartridge to be provided in a water purification cartridge capturing section provided inside a water inlet section of a drain head having a water purification function, the water purification cartridge being provided in the water purification cartridge capturing section such that a front end side of the water purification cartridge in an axial direction is located on a downstream side and a rear end side of the water purification cartridge in the axial direction is located on an upstream side, the water purification cartridge comprising:

An intermediate portion;

a rear forming portion provided at a rear end of the intermediate portion; and

A connection terminal portion provided at a front end of the intermediate portion, the connection terminal portion including a purified water flow path inside the connection terminal portion, and to be connected to a connection receiving portion of the water purification cartridge capturing portion, the connection terminal portion being provided on a downstream side of the intermediate portion, a center line of the connection terminal portion coinciding with a center line of the connection receiving portion, wherein

The connection terminal portion includes:

A first annular filler;

a second annular packing located on a rear side with respect to the first annular packing;

a first groove provided on an outer peripheral surface of the connection terminal portion, and the first annular filler is provided on the first groove;

a second groove provided on the outer peripheral surface of the connection terminal portion, and the second annular filler is provided on the second groove; and

A purified water outlet hole communicating with the purified water flow path in a state where the water purification cartridge is attached to the water purification cartridge capturing section, the purified water flow path being formed between the first annular packing and the second annular packing so as to be spaced apart from a raw water flow path, and

The outer diameter G1 of the first annular packing is smaller than the outer diameter G2 of the second annular packing;

wherein the drain head includes a switching mechanism that switches between the raw water flow path and the purified water flow path.

2. A water purification cartridge according to claim 1, wherein,

3. A water purification cartridge according to claim 2, wherein,

Wherein the difference (D2-D1) is greater than or equal to 0.1mm and less than or equal to 1.0mm.

4. A water purification cartridge according to claim 2 or 3, wherein,

Wherein the ratio (D2/D1) is greater than or equal to 1.05 and less than or equal to 2.0.

5. A water purification cartridge according to any one of claims 2 to 3,

Wherein the width M1 of the first groove is larger than the cross-section diameter D1,

The difference (M1-D1) is greater than the difference (M2-D2).

6. The water purification cartridge of claim 5, wherein,

Wherein when the difference (M1-D1) is defined as W1 and the difference (M2-D2) is defined as W2, the difference (W1-W2) is greater than or equal to 0.1mm and less than or equal to 1.5mm.

7. The water purification cartridge of claim 5, wherein,

Wherein when the difference (M1-D1) is defined as W1 and the difference (M2-D2) is defined as W2, the ratio (W2/W1) is greater than or equal to 0.2 and less than or equal to 0.9.

8. A water purification cartridge according to any one of claims 1 to 3,

Wherein the width M1 of the first groove is greater than the width M2 of the second groove.

9. A water purification cartridge according to any one of claims 1 to 3,

Wherein the diameter of the bottom surface of the first groove varies according to its position in the axial direction, and

The diameter of the bottom surface of the first groove is smaller on the downstream side than on the upstream side.

10. A water purification cartridge according to any one of claims 1 to 3,

Wherein the water purification cartridge further comprises an adsorbent that adsorbs substances contained in the water.

11. The water purification cartridge of claim 10, wherein the adsorbent is activated carbon.

12. A water purification cartridge according to any one of claims 1 to 3,

Wherein the water purification cartridge further comprises a filter material that filters substances contained in the effluent.

13. The water purification cartridge of claim 12, wherein,

The filter material is a filter membrane, and

The filter membrane is a reverse osmosis membrane, an ultrafiltration membrane, a microfiltration membrane, a nanofiltration membrane or a porous hollow fiber membrane.

14. The water purification cartridge of claim 12, wherein,

The substance contained in the water is one or more selected from the group consisting of chlorine, volatile organic compounds, agrochemicals, mold substances and heavy metals.

15. A water purification cartridge to be provided in a water purification cartridge capturing section provided inside a water inlet section of a drain head having a water purification function, the water purification cartridge being provided in the water purification cartridge capturing section such that a front end side of the water purification cartridge in an axial direction is located on a downstream side and a rear end side of the water purification cartridge in the axial direction is located on an upstream side, the water purification cartridge comprising:

An intermediate portion;

a rear forming portion provided at a rear end of the intermediate portion; and

The connection terminal portion includes:

A first annular filler;

A purified water outlet hole communicating with the purified water flow path in a state where the water purification cartridge is attached to the water purification cartridge capturing section, the purified water flow path being formed between the first annular packing and the second annular packing so as to be spaced apart from a raw water flow path,

The first annular packing has an outer diameter G1 smaller than an outer diameter G2 of the second annular packing, and

The intermediate portion comprises a metal material that releases metal ions having a sterilizing effect, an antibacterial effect, a bactericidal effect, or a bacterial growth inhibiting effect;

16. A water purification cartridge to be provided in a water purification cartridge capturing section provided inside a water inlet section of a drain head having a water purification function, the water purification cartridge being provided in the water purification cartridge capturing section such that a front end side of the water purification cartridge in an axial direction is located on a downstream side and a rear end side of the water purification cartridge in the axial direction is located on an upstream side, the water purification cartridge comprising:

An intermediate portion;

a rear forming portion provided at a rear end of the intermediate portion; and

The connection terminal portion includes:

A first annular filler;

The water purification filter element is integrated into a whole;

17. A water purification cartridge to be provided in a water purification cartridge capturing section provided inside a water inlet section of a drain head having a water purification function, the water purification cartridge being provided in the water purification cartridge capturing section such that a front end side of the water purification cartridge in an axial direction is located on a downstream side and a rear end side of the water purification cartridge in the axial direction is located on an upstream side, the water purification cartridge comprising:

An intermediate portion;

a rear forming portion provided at a rear end of the intermediate portion; and

The connection terminal portion includes:

A first annular filler;

A plurality of members constituting the water purification cartridge are detachably attachable to each other;

18. A water purification cartridge to be provided in a water purification cartridge capturing section provided inside a water inlet section of a drain head having a water purification function, the water purification cartridge being provided in the water purification cartridge capturing section such that a front end side of the water purification cartridge in an axial direction is located on a downstream side and a rear end side of the water purification cartridge in the axial direction is located on an upstream side, the water purification cartridge comprising:

An intermediate portion;

a rear forming portion provided at a rear end of the intermediate portion; and

The connection terminal portion includes:

A first annular filler;

The intermediate section includes an adsorbent or filter membrane that removes substances or ions contained in the water;

19. A water purification cartridge to be provided in a water purification cartridge capturing section provided inside a water inlet section of a drain head having a water purification function, the water purification cartridge being provided in the water purification cartridge capturing section such that a front end side of the water purification cartridge in an axial direction is located on a downstream side and a rear end side of the water purification cartridge in the axial direction is located on an upstream side, the water purification cartridge comprising:

An intermediate portion;

a rear forming portion provided at a rear end of the intermediate portion; and

The connection terminal portion includes:

A first annular filler;

The intermediate portion includes a metal material that generates generated water generated by adding metal ions to water;