CN115006894A

CN115006894A - Drainage head with water purification function, water purification filter core and faucet device

Info

Publication number: CN115006894A
Application number: CN202210492817.XA
Authority: CN
Inventors: 高城壽雄; 白武史考
Original assignee: Longevity Holdings Ltd
Current assignee: Japan Gaocheng Co ltd
Priority date: 2018-03-29
Filing date: 2018-03-29
Publication date: 2022-09-06
Also published as: JPWO2019186866A1; WO2019186866A1; AU2018416242B2; CN112203985A; AU2018416242A1; CN112203985B; JP6535826B1

Abstract

[ Objective ] to provide an improved water purification cartridge. [ solution ] A water purification cartridge (PC1) is disposed in a water purification cartridge capturing section (134) of a water discharge head (108) having a water purification function. The water purification cartridge (PC1) includes a connection terminal part (152), the connection terminal part (152) being connected to the connection receiving part (138) of the water purification cartridge capturing part (134). The connection terminal portion (152) includes: a purified water outlet hole (240); a first annular packing (s1) located on a downstream side with respect to the purified water outlet hole (240); and a second annular packing (s2) located on an upstream side with respect to the purified water outlet hole (240). The outer diameter (G1) of the first annular filler (s1) is smaller than the outer diameter (G2) of the second annular filler (s 2).

Description

Drainage head with water purification function, water purification filter core and faucet device

The application is a divisional application of an invention patent application with the application number of 201880092071.5 and the invention name of 'a water discharge head with water purification function, a water purification filter element and a faucet device' which is proposed on 29.03.2018.

Technical Field

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

Background

JP6186059B1 discloses a filter cartridge for use in a water purifier, which is replaceably accommodated in a housing part of the water purifier. A filter cartridge for a water purifier has a buffering portion which is provided downstream of a purification material and cuts off a water hammer propagating from a flow path switching valve to the purification material.

Reference list

Patent document

Patent document 1: JP6186059B1

Disclosure of Invention

Problems to be solved by the invention

The technique disclosed in JP6186059B1 effectively prevents the purification material from being damaged. The technique disclosed in JP6186059B1 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 recognized that the above-described filter element also 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 trap portion of a water discharge head having a water purification function, the water purification cartridge comprising: a connection terminal part connected to the connection receiving part of the water purification cartridge catching part. 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; 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 purification function, the drain head including: an outlet 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 generates purified water in a purified water flow path; a water purification cartridge capturing section in which the water purification cartridge is disposed. The water purification cartridge capturing portion includes a connection receiving portion connected to the water purification cartridge. The water purification cartridge includes a connection terminal part connected to the connection receiving part. 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; 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 that includes a drain head having water purification functionality.

Advantageous effects of the invention

By the above-described novel construction, an improved drainage head, an improved water purification cartridge and an improved water tap 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 discharge 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 around 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 viewed from the front side (downstream side), fig. 7(c) is a cross-sectional view taken along line c-c in fig. 7(b), and fig. 7(d) is a cross-sectional view taken along 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, unless otherwise specified, refers to the radial direction of a water purification cartridge attached in place. The term "axial direction" as used in this disclosure, unless otherwise specified, refers to the axial direction of a water purification cartridge attached in place.

Unless otherwise specified, the term "upstream side" used in the present disclosure refers to an upstream side in the flow of water, and the term "downstream side" used in the present disclosure refers to a downstream side in the flow of water. In the water purification cartridge, an upstream side and a downstream side are determined with respect to an 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 noted, 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 circumferential surface of the cylindrical connection 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 support portion 11. The outlet 10e extends in the radial direction.

When the water purification cartridge is attached, the cylindrical connection portion 10a is inserted into the cartridge support portion 11. During insertion, the downstream O-ring 13a rubs against the first edge 15 and further against the second edge 16. That is, the downstream O-ring 13a is rubbed twice during a single insertion. 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 portion 11, while the upstream O-ring 13b has not yet reached the inside of the cartridge support portion 11. In this state, the center line z1 of the water purification cartridge tends to be inclined with respect to the cartridge support 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 portion 11. The cylindrical connecting portion 10a is inserted into the cartridge support portion 11 with the radially

distal ends

17 and 18 in contact with the inner surface. For this reason, the inner surface of the cartridge support 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 outer peripheral portion of the outlet 10e increases in the axial direction. An increase in length in the axial direction generally leads to an increase in the total length of the water purification cartridge and adversely affects the water purification performance (reduces 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 vertically in contact with the surface of the flow path-forming member, and then flows toward the downstream side (see the arrow in fig. 13). In this case, the resistance of the flow path may increase (problem 3 to be solved).

Scale, dirt, and the like 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 disassembled, 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 above-described newly found problems to be solved.

[ first embodiment ]

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

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

Although not shown in the drawings, the faucet apparatus provided with the faucet device 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 does not pass through the water heater and is connected to a pipe of, for example, a public water supply.

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

The water discharge 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 discharge port 122. In the present embodiment, the operating portion 114 is a button. The water inlet portion 110 also serves as a gripping portion.

The water shape adjusting portion 116 can change the shape of the discharged water (water flow shape). The water shape adjusting part 116 includes a water shape adjusting lever 118. The water flow shape can be changed by operating the water shape adjusting lever 118. Selection from two or more water flow shapes may be made by operating the water shape adjustment lever 118. When the faucet assembly 102 is configured such that two water flow shapes can be selected, the selectable water flow shapes are preferably a straight flow shape and a shower flow shape. When faucet assembly 102 is configured such that three water flow shapes may be selected, the selectable water flow shapes are preferably straight flow shapes, as well as first and second shower flow shapes having different shower flow patterns. The present embodiment adopts this configuration. Shower flow patterns are 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 the raw water is also referred to as "raw water discharge state". When the purified water flow path is selected, the purified water is discharged from the discharge port 122. The state of discharging the purified water is also referred to as "purified water discharge state".

The switching part 112 includes a switching mechanism that enables switching of the drainage between the purified water and the raw water by the operation of the operating part 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 drain 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 (angular position of the water purification cartridge about its center line). In fig. 3(a) and 3(b), the operating portion 114 is in a protruding position. Fig. 4(a), 4(b), 5(a) and 5(b) are also cross-sectional views of the discharge 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 a 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 operating portion 114 is pushed to switch between the flow paths. Switching between the raw water flow path and the purified water flow path is effected each time the operating portion 114 is pressed. In other words, the switching between the raw water discharge state and the purified water discharge state is achieved each time the operating portion 114 is pressed. The switching mechanism includes a thrust locking mechanism operated by alternate action. This push lock enables the operating portion 114 to function as a push button. Each time the push button 114 is pressed, the push button 114 is positionally displaced between the protruding position and the depressed position. Such switching mechanisms are known.

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

The discharge head 108 includes a water purification cartridge PC 1. A water purification cartridge PC1 is disposed inside the water inlet portion 110. The water inlet portion 110 includes an outer cylindrical portion 124. A 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. Inside the water purification cartridge PC1, a purified water flow path WJ is formed. In the raw water discharge state, after passing through the raw water flow path WG formed inside the switching mechanism, the 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, in the process of raw water flowing into the water purification cartridge PC1 from the outside of the water purification cartridge PC1, the raw water is filtered by the permeable portion 126 of the water purification cartridge PC1 to become purified water. The purified water passes 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, and is then discharged from the discharge port 122. The permeable part 126 is an example of a water purification function part.

The switching portion 112 of the discharge head 108 includes a first valve 130 and a second valve 132. Switching of the drain can be performed by 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 130 d. 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 the circular hole. The ball 130b is held by a ball holder 130 c. The ball retainer 130c is open downward. 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 130 d.

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 132 d. The second valve 132 is a ball valve. The second valve body 132b is a ball. The valve seat 132a is an opening edge of the circular hole. The ball 132b is held by a ball holder 132 c. The ball retainer 132c is open downward. The elastic body 132d is disposed between the upper portion of the ball holder 132c and the ball 132 b. The elastic body 132d is a coil spring. The ball 132b is always biased toward the valve seat 132a by the elastic body 132 d.

Push button 114 is connected to ball retainer 130c and ball retainer 132c by inserting a push lock mechanism between push button 114 and

ball retainers

130c and 132 c. Ball retainer 130c and ball retainer 132c move with button 114. The ball 130b moves with the ball retainer 130c, and the ball 132b moves with the 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, the raw water is discharged. The second valve 132 is a purified water shutoff 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 stop valve that closes the raw water flow path.

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

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

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

The connection terminal portion 152 is disposed on the downstream side of the intermediate portion 150. The inside of the connection terminal portion 152 is an empty space. This 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 intermediate 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 therein. The empty space serves as the purified water flow path WJ. The middle portion 150 may include, for example, an outer filter layer and an inner filter layer. Water purification material may be disposed between the outer and inner filtration layers. 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. The outer and/or inner filter layers may be formed using an antimicrobial ceramic material. Ion exchangers may be used to form the outer and/or inner filtration layers. A plurality of 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 purification function portion (a portion having a water purification function). The middle portion 150 does not necessarily have a filtering function. The intermediate portion 150 may be a water impermeable cylindrical wall portion.

The water purification cartridge PC1 of this example comprises a water purification material that can remove chlorine. Examples of purification materials include activated carbon.

The rear forming portion 154 closes the rear side of the middle portion 150. On the other hand, the connection terminal portion 152 is permeable to water. An empty space inside the connection terminal portion 152 serves as the 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 posterior forming section 154 may be water permeable. For example, the raw water may flow into the intermediate portion 150 from a through hole provided in the rear formation 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 a downstream side of the cylindrical retaining 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 center line of the first cylindrical portion 160 coincides with the center line z1 of the water purification cartridge PC 1. The centre line of the second cylindrical portion 162 coincides with the centre line z1 of the water purification cartridge PC 1. The centre line of the third cylindrical portion 164 coincides with the centre line 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 s 2. In the present 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 maximum outer diameter portion (cylindrical holding portion 166) covers the downstream side end portion of the intermediate portion 150. The maximum 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 third cylindrical portion 164 has an outer diameter that is less 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 s 2. The first annular packing s1 is provided on the first cylindrical portion 160. A second annular packing s2 is provided 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 this 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 circumferential 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 recess 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 the radial direction. The front end surface 174 is annular (see fig. 7 (b)). The leading end surface 174 is provided to extend in the entire circumferential direction. The front end surface 174 is centered on the centerline z1 of the water purification cartridge PC 1.

The front end portion 170 is water impermeable. The inner surface of the leading end portion 170 faces the purified water flow path WJ. In the present embodiment, the inner surface of the nose 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 the present embodiment, the outer surface of the nose portion 170 includes a nose surface 174 and a recess 176. The outer surface of the nose 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 packing s 1. The centre line of the front end part 170 coincides with the centre line 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 recess 176 opens toward the downstream side. The recess 176 opens forward in the axial direction. The recess 176 opens to the raw water flow path WG. The recess 176 is watertight. The recess 176 has a circular cross-section (see fig. 7 (b)). The leading end surface 174 is disposed in the circumferential direction (radially outward) of the recess 176. The recess 176 forms an empty space inside the 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 packing s 1. The empty space formed by the recess 176 is located radially inward of the first groove 172. The center line of the front end surface 174 coincides with the center line z1 of the water purification cartridge PC 1.

As shown in fig. 8 and 9, the recess 176 has a side surface 178 and a bottom surface 180. The side surface 178 is a circumferential surface. 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 circular. The bottom surface 180 is centered on the center line 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 located radially inward of the bottom surface 172 a.

The front end portion 170 includes a dividing wall 190. The partition wall 190 is water-tight. 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 center line of the partition wall 190 coincides with the center line z1 of the water purification cartridge PC 1.

The partition wall 190 intersects the center line 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 the outer surface 192 of the partition 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), a plurality of coupling extending portions 200 are arranged at equal intervals in the circumferential direction. In the present embodiment, four coupling extensions 200 are arranged at equal intervals in the circumferential direction. The coupling extension part 200 extends in a direction inclined with respect to the center line z1 of the water purification cartridge PC 1. The coupling extensions 200 respectively extend inward in the radial direction further to the downstream side. The coupling extension portion 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. The second groove 210 is formed on the outer circumferential 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 internally empty space. The space inside the second cylindrical portion 162 serves as the purified water flow path WJ.

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

The downstream side end surface 212 may be continuously formed without a gap in the entire circumferential direction. Alternatively, segments that are separated from each other by the coupling extending portions 200 and are arranged in the circumferential direction may constitute the downstream-side end surface 212. Alternatively, the downstream-side end surface 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 surface 212 is formed of four segments 214, the four segments 214 being separated from each other by the coupling extending portion 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 on the downstream side of the coupling extension 200. Extended downstream surface 202 has configuration 1, wherein extended downstream surface 202 extends inward in a radial direction as further downstream. Advantageous effect 1 is obtained with configuration 1. Advantageous effects 1 is that, when the connection terminal part 152 of the water purification cartridge PC1 is inserted into the connection receiving part 138 in the water purification cartridge catching part 134 of the drain head 108, and a part of the connection receiving part 138 is in contact with each extended downstream surface 202, configuration 1 adjusts the position of the part of the connection receiving part 138 so that the center line of the connection terminal part 152 coincides with the center line of the connection receiving part 138, thereby preventing damage to the connection terminal part 152 and the connection receiving part 138, and improving handling convenience in inserting the connection terminal part 152 of the water purification cartridge PC1 into the connection receiving part 138 in the water purification cartridge catching part 134 of the drain head 108.

The downstream-side end surface 212 has the 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 water discharge head 108 may include a pressing portion to be pressed by the water purification cartridge PC 1. A drain head having a water purification function, a water purification 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 the discharge state. In this case, the structure in which the surface of a part of the connection terminal portion that presses the pressing portion extends in the radial direction (i.e., the surface is perpendicular to the axial direction) brings about 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 surface 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, the

configurations

1 and 2 can both achieve the

advantageous effects

1 and 2. Further, since both configurations are provided in the same axial direction region of the connection terminal portion 152, a water discharge head having a water purification function can be prevented, the sizes of the water purification cartridge and the faucet device can be increased, and the area of the region where the water purification function portion can be provided can also be increased.

The third cylindrical portion 164 includes a circumferential surface 220 and a stepped surface 222. The circumferential surface 220 is a circumferential surface. The centre line of the circumferential surface 220 coincides with the centre line z1 of the water purification cartridge PC 1. The step surface 222 is a flat surface. The step surface 222 extends in the 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 the 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 center line of the circumferential surface 230 coincides with the center line z1 of the water purification cartridge PC 1. The step surface 232 is a flat surface. The step surface 232 extends in the radial direction. The step surface 232 is annular. The step surface 232 is formed to extend in the entire circumferential direction. A 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 hole 240 is located between the first cylindrical portion 160 (the 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 extensions 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 capturing portion 134 of the drain head 108 includes the connection receiving portion 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 a downstream side with respect to the second receiving cylindrical portion 256. The first receiving cylindrical portion 254 is located on a 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 annular packing s1 and the second annular packing s2 ensure water tightness. The first cylindrical portion 160 (front end portion 170) of the connection terminal portion 152 is inserted inside 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 stepped surface 222. The position of the water purification cartridge PC1 in the axial direction is set by this abutment.

The connection receiving part 138 includes a purified water passage 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 passage WG1, the raw water passage WG1 constituting a part of the raw water flow path WG and being spaced apart from the purified water passage WJ1 to guide raw water so as not to flow into the purified water passage WJ1 (see fig. 4(a) and 10). The connection receiving portion 138 includes a partition wall 260 (see fig. 10) forming a raw water passage WG 1. The 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 a radial direction. The partition wall 260 forms a raw water passage WG1 between the partition wall 260 and the recess 176. The raw water passage WG1 forms a raw water flow path WG (see fig. 4(a)) that penetrates in the left-right direction. 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 recess 176. The front end surface 174 faces the raw water flow path WG. The recess 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 the water flowing out of the raw water channel 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 is provided on the downstream side of the recess 176 (see fig. 10). 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 WG 1. 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 disposed 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 (expanded metal). The water permeable member 270 does not obstruct the flow of water in the raw water flow path WG. The water flowing through the raw water passage WG1 may collide against the front end surface 174. Water flowing through the raw water passage WG1 may flow into the groove 176. The water permeable member 270 may prevent foreign substances from entering the raw water passage WG 1.

Fig. 11 is a partially enlarged view of fig. 5 (b). The purified water outlet hole 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 242 b. The radially inner edge 242a is circular in its entirety. The radially inner edge 242a is centered on the center line z1 of the water purification cartridge PC 1. The radially outer edge 242b is circular in its entirety. The radially outer edge 242b is centered on the center line z1 of the water purification cartridge PC 1. The radially inner edge 242a is located radially inward relative to the radially outer edge 242 b. The radially inner edge 242a is located on the downstream side with respect to the radially outer edge 242 b.

The broken line in fig. 11 indicates 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 indicates a straight line L2 perpendicular to the straight line L1. The straight line L2 is inclined to extend outward in the radial direction as 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 inclination angle.

The double-headed arrow S1 in fig. 11 indicates the opening width in the radial direction 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 between the radially inner edge 242a and the radially outer edge 242b in the radial direction. The double-headed arrow V in fig. 11 indicates the axial direction width of the outlet opening edge 242. The outlet opening edge 242 has an axial direction width V. The axial direction width V is a 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 hole 240 is 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 through (see an arrow y1 in fig. 12). In a cross section taken along the center line z1, the purified water outlet hole 240 has, as a straight line X, 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. The straight lines X1 and X2 are positioned apart from each other in the radial direction. That is, there is a distance between the straight lines X1 and X2 in the radial direction. The distance in the radial direction is also referred to as a front-rear through width. The purified water outlet hole 240 has a front-rear penetrating 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 cross-sectional diameter D1(mm), and the cross-sectional diameter of the second annular filler s2 is defined as cross-sectional diameter D2 (mm). Note here that the cross-sectional diameter D1 is a diameter measured in a state where the first annular packing s1 alone exists. That is, the cross-sectional diameter D1 is measured in a state where no external force is applied to the first annular packing s 1. Also, the cross-sectional diameter D2 is a diameter measured in a state where the second annular filler s2 alone exists. 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 less than the cross-sectional diameter D2. The cross-sectional diameter D1 is less than the groove width M1. The cross-sectional diameter D2 is less than the groove width M2.

As shown in fig. 9, the groove width M1 is greater than the cross-sectional diameter D1 of the first annular filler s 1. In the first groove 172, the first annular packing s1 is disposed with a gap in the axial direction. In the first groove 172, the first annular packing s1 can move 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 diameter of the bottom surface 172a on the downstream side is smaller than that on the upstream side. In fig. 9, the first annular packing s1 is located on 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 relaxes. 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 greater 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 the bottom surface 210a is greater than the diameter of the 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 on the most upstream side in the second groove 210. Even if the second annular filler s2 moves in the axial direction in the second groove 210, the degree of compression of the second annular filler s2 does not change.

In fig. 9, a double-headed 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 purification cartridge PC1 is not attached to the water discharge 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-headed arrow G2 indicates the outer diameter of the second annular filler 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 purification cartridge PC1 is not attached to the water discharge 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 packing are measured, respectively, in a state where the annular packing 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 filler s1 is smaller than the outer diameter G2 of the second annular filler s 2.

In fig. 9, a double-headed arrow W1 indicates 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 indicates a width obtained by subtracting the cross-sectional diameter D2 from the groove width M2. That is, W2 — M2-D2. The first and second annular fillers s1, s2 in fig. 9 are in an attached state and thus compressed. Therefore, 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 also not the cross-sectional diameter D2. From this viewpoint, it is inappropriate to show the widths W1 and W2 in fig. 9. However, for ease of understanding, fig. 9 shows widths W1 and W2. Likewise, it is not appropriate to show the cross-sectional diameters D1 and D2 in fig. 9. However, for ease of understanding, fig. 9 shows cross-sectional diameters D1 and D2.

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

Calcium, dirt, and the like 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 packing materials swell because they are always exposed to water, and this swelling also aggravates adhesion. This adhesion makes it difficult to detach the water purification cartridge PC1 from the connection receiving part 138. In addition, since a great force is required to detach the water purification cartridge PC1, a load is applied to the annular packing, so that the deterioration of the annular packing can be accelerated.

As a result of setting the widths W1 and W2, the annular packing materials s1 and s2 are easily deformed when the water purification cartridge PC1 is disassembled. Thus, the removability of the water purification cartridge PC1 is improved. In addition, the ring packings s1 and s2 can move in the grooves. Therefore, the portions adhered to each other are gradually separated, thereby improving detachability.

The present embodiment produces the following advantageous effects.

[ Effect produced 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 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. Therefore, unlike the case of the prior art (fig. 13), the first annular packing s1 is highly unlikely to be rubbed twice during a single insertion. Therefore, the occurrence of damage to the first annular packing s1 on the downstream side is suppressed (packing damage suppressing effect).

This configuration also solves the above-described 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, the 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 the penetration of the purified water outlet hole 240 in the axial direction is easily achieved. Therefore, this configuration also contributes to solving 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 be lowered, and the water-tightness achieved by the first annular packing s1 tends to be deteriorated. From this viewpoint, the outer diameter G1 is preferably greater than or equal to 7mm, more preferably greater than or equal to 9mm, and still more preferably greater than or equal to 10 mm. If the outer diameter G1 is excessively 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 viewpoint, 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 13 mm. In the above embodiment, the outer diameter G1 was 11 mm.

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 viewpoint, the outer diameter G2 is preferably greater than or equal to 12mm, more preferably greater than or equal to 14mm, and still more preferably greater than or equal to 16 mm. 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 the faucet to be large-sized. From this viewpoint, 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 21 mm. In the above embodiment, the outer diameter G2 is 18.8 mm.

If the difference (G2-G1) is too small, the above-described filler damage suppressing effect and receiving portion damage suppressing effect are reduced, and the effect of solving problems 3 and 4 is also reduced. In addition, if the difference (G2-G1) is too small, the flow rate of the purified water may decrease. 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 6 mm. 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 viewpoint, 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 10 mm. In the above examples, the difference (G2-G1) was 7.8 mm.

If the ratio (G2/G1) is too small, the above-described filler damage suppressing effect and receiving portion damage suppressing effect are reduced, and the effects of solving 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 reduced. From this viewpoint, 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 1.5 mm. 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 upsizing of the faucet. From this viewpoint, 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 1.9 mm. In the above examples, G2/G1 was 1.7 mm.

[ Effect produced by the opening inclination Angle θ ]

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

This opening inclination angle θ solves the above problem 3. By setting this 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 a problem of sacrificing the water purification performance (the length of the water purification material) (the axial direction length increase suppression effect) are suppressed. 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 hit the surface of the member constituting the flow path is reduced, and therefore, the resistance of the flow path (flow path resistance reducing effect) can be reduced.

Further, this 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 water flow direction adjacent to the gap 19 is a substantially radial direction (see the arrow in fig. 13). Therefore, water tends to remain in the gap 19, so that scale, dirt, and the like 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 this angle θ causes the water to flow obliquely forward in the purified water outlet hole 240 (see arrow y2 in fig. 12). The water flowing obliquely forward includes the components flowing axially forward, 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, and the like 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 disassembled, and enter the purified water flow path WJ from the purified water outlet port 240. However, since water is less likely to remain in the gap 280, the formation of deposits is suppressed, thereby suppressing the occurrence of a problem that scraped-off deposits flow into the purified water flow path WJ (deposit formation suppression 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 suppression effect may decrease. From this viewpoint, the opening inclination angle θ is preferably greater than or equal to 30 °, more preferably greater than or equal to 40 °, and more preferably greater than or equal to 50 °. If the opening inclination angle θ is excessively 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 the purified water outlet hole penetrating in the axial direction ]

As described above, the purified water outlet hole 240 penetrates in the axial direction (see the arrow y1 in fig. 12). Therefore, the water flow easily enters the gap 280, thereby further enhancing the above-described deposit formation suppressing effect. 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 reducing effect.

If the front-rear through 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 penetrating width S2 is preferably greater than or equal to 1.05mm, and more preferably greater than or equal to 1.1 mm. If the front-rear through 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 filler s 2. From these viewpoints, the front-rear penetrating 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 2 mm. In the present embodiment, the front-rear penetration width S2 is 1.1 mm.

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 are reduced. From this viewpoint, the radial direction opening width S1 is preferably greater than or equal to 1.05mm, and more preferably greater than or equal to 1.1 mm. If the radial direction opening width S1 is too 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 filler 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 2 mm. In the present embodiment, the radial direction opening width S1 is 1.1 mm.

[ 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 workability. Therefore, it is difficult to attach the 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.

The annular packing having a small cross-sectional diameter is easily expanded and thus can be easily attached to the groove. That is, the annular packing having a small cross-sectional diameter has high adhesion. On the other hand, the annular packing having a large cross-sectional diameter is hardly expandable and thus has low adhesion.

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

In the above-described embodiment, the deteriorated adhesion may be exhibited due to the small outer diameter G1 of the first annular filler s1 on the downstream side. 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 sufficiently high to allow some deterioration. Therefore, the cross-sectional diameter D2 is set to be larger to improve 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 1.3 mm. 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 1.7 mm. In the above embodiment, the cross-sectional diameter D1 was 1.5 mm.

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 1.7 mm. 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 2.3 mm. In the above embodiment, the cross-sectional diameter D2 was 1.9 mm.

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 be deteriorated. 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 be deteriorated. From this viewpoint, 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 0.3 mm. If the cross-sectional diameter D2 is excessively large, the adhesion of the second annular filler s2 may be deteriorated. If the cross-sectional diameter D1 is too small, the sealability of the first annular packing 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 be deteriorated. From this viewpoint, 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 0.6 mm. In the above examples, the difference (D2-D1) was 0.4 mm.

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 be deteriorated. From this viewpoint, 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 viewpoint, 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 embodiment, the ratio (D2/D1) was 1.27.

[ Effect produced by W1> W2 ]

As described above, width W1 is greater than 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 filler s2 is less likely to be a factor causing deterioration in detachability. On the other hand, the first annular packing s1 on the downstream side has a small cross-sectional diameter D1, and therefore is not easily deformed when the water purification cartridge PC1 is disassembled. Therefore, the first annular packing s1 is likely to be a factor causing deterioration in detachability. Therefore, the width W1 of the first annular packing s1 that is not easily deformed is set larger than the width W2 to improve detachability. 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 deterioration in the water purification performance (reduction in the length of the water purification material). By making the width W2 smaller than the width W1, occurrence of these inconveniences can be suppressed.

From the viewpoint of detachability, 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 1.1 mm. From the viewpoint of suppressing an increase in the length of the water purification cartridge PC1 and deterioration in 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 1.5 mm. In the present embodiment, the width W1 is 1.3 mm.

From the viewpoint of detachability, 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 0.4 mm. From the viewpoint of suppressing an increase in the length of the water purification cartridge PC1 and deterioration in 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 0.8 mm. In the present embodiment, the width W2 is 0.6 mm.

From the viewpoint of avoiding the width W1 being too small and the width W2 being too large, 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 0.5 mm. From the viewpoint of avoiding the width W1 being excessively large and the width W2 being excessively small, 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 0.8 mm. In the present example, the difference (W1-W2) was 0.7 mm.

From the viewpoint of avoiding the width W2 being too small and the width W1 being too large, 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 viewpoint of avoiding the width W2 being excessively large and the width W1 being excessively small, 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 the present embodiment, the ratio (W2/W1) is 0.46.

[ Effect due to concave portion ]

As mentioned above, the outer surface of the front end portion 170 of the water purification cartridge PC1 includes a 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 in improving the sealability achieved by the first annular packing s 1.

If the inside of the filler placing portion (the portion where the first annular filler s1 is placed) having a predetermined length in the axial direction is solid without empty space, large sink marks (shrinkage at the time of forming) are caused during forming. This phenomenon may occur regardless of whether the resin used is a thermoplastic resin or a thermosetting resin. For example, in injection molding of thermoplastic resin, sink marks may be caused during cooling. For example, in the molding of a thermosetting resin, sink marks may be caused during the curing of the resin. In addition, if the inside of the packing placement portion 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 placing portion, the formation of sink marks is suppressed, and also dimensional change is suppressed. Therefore, the dimensional accuracy of the bottom surface 172a of the first groove 172 is improved, and the sealability achieved by the first annular packing s1 is improved.

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

When the recess is provided on the inner surface of the leading end portion 170, the recess faces the purified water flow path WJ. The purified water can flow into and remain in the recess. It is not preferable in view of the aspect of hygiene that the purified water in which chlorine has been removed remains in the recess. To solve this problem, in the present embodiment, the recess 176 is provided on the outer surface of the front end portion 170. The recess 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 situation in which purified water from which chlorine has been removed remains in the recess.

Further, when the 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 this 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 turbulent flow, the flow rate in the purified water flow path WJ is further reduced. In the present embodiment, this is avoided.

In fig. 9, a double-headed arrow T indicates the shortest distance between the bottom surface 172a of the first recess 172 and the recess 176 (side surface 178). If the shortest distance T is too small, deterioration of the sealing property may be caused due to reduction in strength 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 1.2 mm. If the shortest distance T is too large, the sink mark becomes large. From this viewpoint, 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 1.8 mm. In the above embodiment, the shortest distance T is 1.5 mm.

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

As described above, the outer surface of the leading end portion 170 faces the raw water flow path WG (see fig. 11). A water hammer or a high water pressure acts on the front end portion 170, and this may cause the water purification cartridge PC1 to vibrate. The water purification cartridge PC1 is vibrated every time the drain water is switched. 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 water-tight. The partition wall 190 is provided at a position where it intersects with the center line z1 of the water purification cartridge PC 1. With this configuration, a 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 necessarily extend in the radial direction. In the above embodiment, the partition wall 190 extends in the radial direction. With this configuration, a water hammer or high water pressure acting on the partition wall 190 is efficiently 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 center line of the partition wall 190 preferably coincides with the center line z1 of the water purification cartridge PC1, the center line of the partition wall 190 does not necessarily coincide with the center line z1 of the water purification cartridge PC 1. In the above embodiment, the center line of the partition wall 190 coincides with the center line z1 of the water purification cartridge PC 1. Therefore, the pressure acting on the partition wall 190 can be efficiently transmitted to the water purification cartridge PC 1.

As described above, the recess 176 is provided on the outer surface of the front end portion 170. The recess 176 may more effectively capture water hammer or high water pressure than a flat surface without a recess, or the like. 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 the radial direction. By providing the recess 176, it is possible to effectively capture water flowing through the raw water passage WG1 extending in the radial direction. The recess 176 may 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, the recess 176 has a side surface 178 and a bottom surface 180. The bottom surface 180 extends in a radial direction. Thus, a water hammer or high water pressure acting on the bottom surface 180 may cause vibration in the axial direction. The side surface 178 extends in the axial direction. Thus, a water hammer or high water pressure acting on the side surface 178 may cause vibration in the radial direction. The vibration in two directions can effectively suppress the occurrence of adhesion of the fillers s1 and s 2.

In the above embodiment, the annular packing 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. Also, there is no limitation on the cross-sectional shape of the annular packing. Each of the annular packings 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 comprehensive viewpoint of ensuring sealability (water tightness) and suppressing the occurrence of adhesion of the annular packing 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 metal, it is preferable from the viewpoint of cost to manufacture the connection terminal portion 152 by sintering, casting, or forging. From the viewpoint of cost, the resin is better than the metal. Examples of the resin include thermoplastic resins and thermosetting resins. Thermoplastic resins which are easy to shape 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 resin (ABS) and polypropylene resin (PP) are particularly preferable.

Examples of the material of the front end portion 170 include resin and metal. When the material is metal, from the viewpoint of cost, the front end portion 170 is preferably manufactured by sintering, casting, or forging. From the viewpoint of cost, the resin is better than the metal. Examples of the resin include thermoplastic resins and thermosetting resins. Thermoplastic resins which are easy to shape 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 resin (ABS) and polypropylene resin (PP) are particularly preferable.

In the water purification cartridge PC1 of the above 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 PC 1. 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 a water-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 from the rear end of the water purification cartridge PC1 into the water purification cartridge PC 1. For example, an inlet may be provided at the upstream side end (rear end) of the water purification cartridge PC 1. 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 purified water is produced by passing raw water through the water permeable portion. As described above, the water permeable part is only an example of the water purification function part. Alternatively, the purified water may be produced without passing the raw water through the water permeable section. For example, the water purification cartridge may include a metal material that releases metal ions having a sterilizing effect, an antibacterial effect, a bactericidal effect or a bacterial growth inhibitory effect, and such a metal material may also be used to generate purified water.

The term "purified water" as used in this disclosure is meant to encompass the following concept of producing water (1) and (2).

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

(2) The generated water having beneficial characteristics imparted by adding metal ions, electrons, substances, and the like to water, for example, generated water obtained by adding metal ions to water to impart a bactericidal effect or the like.

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

[ function A ]

The function a is at least one function selected from the group consisting of the following functions a1, a2, A3, a4, and a 5.

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

A2: the function of filtering out substances contained in water is to use a filter material. 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: their functions are removed by collecting metal ions and the like contained in water using ion exchange resin or the like.

A4: the metal ions having a sterilizing action, an antibacterial action, a bactericidal action and/or a bacteria growth inhibiting action are released from the metal material.

A5: the function of generating active oxygen by causing metal ions to be released from the metal material and allowing oxygen in water to acquire electrons generated by the release of the metal ions is obtained.

Examples of substances in water to be removed for purification include chlorine, volatile organic compounds, agrochemicals, musty substances and heavy metals. It is preferable to remove one or more selected from the group consisting of chlorine, volatile organic compounds, agrochemicals, musty substances and heavy metals.

The term "chlorine" as used in this disclosure is meant to encompass the concept of residual chlorine contained in tap water. The 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 trichloroamine. This residual chlorine is generated when chlorine gas is dissolved in water to disinfect the water.

Examples of volatile organic compounds include chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1,1, 1-trichloroethane and total trihalomethanes. It is preferable to remove one or more selected from the group consisting of chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1,1, 1-trichloroethane and total trihalomethanes.

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 musty substances include 2-methylisoborneol, geosmin and phenol. It is preferable to remove one or more selected from the group consisting of 2-methylisobornyl alcohol, geosmin and phenol.

Examples of heavy metals include lead, mercury, copper, arsenic and cadmium. It is preferable to remove one or more selected from the group consisting of lead, mercury, copper, arsenic and cadmium.

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 (comprised by) common bacteria. Preferably, one or more types of these bacteria are subjected to a bactericidal action, an antibacterial action, a bactericidal action or a bacterial growth inhibitory action.

The active oxygen in function a5 may degrade organic substances such as bacteria. Examples of bacteria include Colon bacilli and staphylococci, as well as miscellaneous bacteria defined as (contained in) common bacteria. Preferably, one or more types of these bacteria are degraded.

The water purification cartridge having function a1 is preferable from the viewpoint of being able to effectively remove chlorine and harmful substances and allowing reduction in the manufacturing cost of the water purification cartridge. In addition to function a1, the water purification cartridge may also have one or more functions selected from functions a2, A3, a4 and a 5.

[ function B ]

Function B is a function of purifying water using the filter material and/or medium defined in "(vi) water purifier" in appendix 2 (for article 2) of miscellaneous finished product quality label regulations (revision date: 3/30/effective date: 4/1 in 2017). In other words, the water purification cartridge preferably comprises a water purification function which purifies water using the filter material and/or medium defined in "(vi) water purifier" in appendix 2 (for article 2) of miscellaneous finished product quality label regulations (revision date: 3/30/effective date: 4/1/2017).

The water purification function portion having function a and/or 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 pool portion communicating with the purified water flow path.

The water purification cartridge may be of an integrated type in which all members 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 members.

The composite water purification cartridge may 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 attachable to the cartridge body. When the adapter member is attachable to the cartridge body, the adapter member may or may not be removably attached to the cartridge body. The function of the adapter member is not limited. For example, the changeover member may have a function of affecting the operability of the operation portion (button) 114.

The configurations of the adapter member and the filter element body are not limited. Examples of the configuration may include the following configurations B1 to B4.

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

B2: the adapter member is first attached to the cartridge capture portion and then the cartridge body is attached to the adapter member.

B3: the construction of attaching the adapter member to one portion of the cartridge capture portion and then attaching the cartridge body to another portion of the cartridge capture portion.

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

In the above-described configurations B1-B4, the adapter 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 provided in a water purification cartridge trap portion of a water discharge head having a water purification function, the water purification cartridge comprising:

a connection terminal part connected to the connection receiving part of the water purification cartridge catching part,

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.

[ clause 2] the water purification cartridge according to clause 1,

wherein the purified water outlet hole includes an outlet opening edge,

the outlet opening edge includes 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 and outer edges 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 further toward the downstream side.

[ clause 3] the water purification cartridge according to

clause

1 or 2,

wherein the purified water outlet hole is penetrated in the axial direction.

[ clause 4] the water purification cartridge according to anyone of clauses 1 to 3,

wherein the cross-sectional diameter D1 of the first annular filler is smaller than the cross-sectional diameter D2 of the second annular filler.

[ clause 5] the water purification cartridge according to clause 4,

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

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

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

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

[ clause 6] the water purification cartridge according to anyone of clauses 1 to 5,

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

the connection terminal portion includes a watertight front end portion, and a first ring-shaped 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 nose portion includes a recess, an

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

[ item 7] A water discharge head having a water purification function, comprising:

an outlet 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 generates purified water in a purified water flow path; and

a water purification cartridge capturing part in which a water purification cartridge is disposed,

wherein the water purification cartridge capturing part includes a connection receiving part connected to the water purification cartridge,

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

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.

[ clause 8] a faucet assembly, comprising:

the water discharge head having a water purification function according to item 7.

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

The forms, members, configurations, and the like shown in the above-described embodiments are each independently applicable to all the inventions described in the present disclosure, including the inventions set forth in the claims of the present disclosure, even if not every 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 operating part

134 Water purification cartridge Capture section

138 connecting the receiving part

152 connecting terminal portion

154 post-formation part

160 first cylindrical portion

162 second cylindrical portion

164 third cylindrical portion

172 first groove

174 front end surface

176 concave part

178 side surface of recess

180 bottom surface of recess

190 partition wall

210 second groove

240 outlet hole for purified water

242 edge of the outlet opening

254 first receiving cylindrical portion

256 second receiving cylindrical portion

PC1 water purification filter element

s1 first Ring packing

s2 second Ring 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 disposed in a water purification cartridge trap portion of a water discharge head having a water purification function, comprising:

a middle portion;

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

a connection terminal part provided at a front end of the middle part, the connection terminal part including a purified water flow path inside the connection terminal part, and to be connected to a connection receiving part of the water purification cartridge catching part, wherein

The connection terminal portion includes:

a first annular packing;

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

a first groove that is provided on an outer peripheral surface of the connection terminal portion and on which the first annular packing is provided;

a second groove that is provided on the outer peripheral surface of the connection terminal portion, and on which the second annular packing is provided; 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 part, the purified water flow path being formed between the first annular packing and the second annular packing so as to be spaced apart from the raw water flow path, and

2. Water purification cartridge according to claim 1,

wherein a cross-sectional diameter D1 of the first annular filler is less than a cross-sectional diameter D2 of the second annular filler.

3. Water purification cartridge according to claim 2,

wherein the difference (D2-D1) is 0.1mm or more and 1.0mm or less.

4. Water purification cartridge according to claim 2 or 3,

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

5. Water purification cartridge according to any one of claims 2 to 4,

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

a width M2 of the second groove is greater than the cross-sectional diameter D2, and

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

6. Water purification cartridge according to claim 5,

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 1.5 mm.

7. Water purification cartridge according to claim 5,

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. Water purification cartridge according to any one of claims 1 to 7,

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

9. Water purification cartridge according to any one of claims 1 to 8,

wherein a diameter of a bottom surface of the first groove varies depending on a position thereof in an axial direction, and

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

10. Water purification cartridge according to any one of claims 1 to 9,

wherein the water purification cartridge further comprises an adsorbent adsorbing substances contained in the water.

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

12. Water purification cartridge according to any one of claims 1 to 11,

wherein the water purification cartridge further comprises a filter material that filters out substances contained in the water.

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. Water purification cartridge according to any one of claims 10 to 13, wherein,

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

15. A water purification cartridge to be disposed in a water purification cartridge trap portion of a water discharge head having a water purification function, comprising:

a middle portion;

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

a connection terminal part provided at a front end of the middle part, the connection terminal part including a purified water flow path inside the connection terminal part, and the connection terminal part to be connected to a connection receiving part of the water purification cartridge catching part, wherein

The connection terminal portion includes:

a first annular packing;

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 part, the purified water flow path being formed between the first annular packing and the second annular packing so as to be spaced apart from the raw water flow path,

the outer diameter G1 of the first annular packing is smaller than the outer diameter G2 of the second annular packing, and

the intermediate portion includes a metallic material that releases metal ions having a sterilizing, antibacterial, bactericidal, or bacterial growth inhibiting effect.

16. A water purification cartridge to be disposed in a water purification cartridge trap portion of a water discharge head having a water purification function, comprising:

a middle portion;

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

The connection terminal portion includes:

a first annular packing;

the water purification cartridge is integrated as a whole.

17. A water purification cartridge to be disposed in a water purification cartridge trap portion of a water discharge head having a water purification function, comprising:

a middle portion;

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

The connection terminal portion includes:

a first annular packing;

a plurality of members constituting the water purification cartridge can be detachably attached to each other.

18. A water purification cartridge to be disposed in a water purification cartridge trap portion of a water discharge head having a water purification function, comprising:

a middle portion;

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

The connection terminal portion includes:

a first annular packing;

the intermediate portion includes an adsorbent or filter membrane that removes substances or ions contained in the water.

19. A water purification cartridge to be disposed in a water purification cartridge trap portion of a water discharge head having a water purification function, comprising:

a middle portion;

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

The connection terminal portion includes:

a first annular packing;

a second annular packing located at a rear side relative to the first annular packing;

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

the intermediate portion includes a metallic material that produces produced water generated by adding metal ions to water.