CN108726717B

CN108726717B - Water treatment device

Info

Publication number: CN108726717B
Application number: CN201710242895.3A
Authority: CN
Inventors: 王新建; 刘志强; 贾文章; 冯杰; 刘欢欢
Original assignee: Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Current assignee: Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Priority date: 2017-04-14
Filing date: 2017-04-14
Publication date: 2023-02-10
Anticipated expiration: 2037-04-14
Also published as: CN108726717A

Abstract

A water processor comprises a filter flask and a filter flask base, wherein the filter flask is connected with the filter flask base, a filter element is arranged in the filter flask, and the filter flask base is provided with a water inlet and a water outlet which are communicated with a filter water path and a water source; the filtering waterway is connected with the filtering bottle and the filtering bottle base and also comprises a rotary valve and a one-way valve, the rotary valve and the one-way valve are sequentially arranged from bottom to top, the rotary valve is arranged in the filtering bottle base, the one-way valve is arranged in the filtering bottle, and the rotary valve rotates relative to the filtering bottle base by taking the axis of the filtering bottle as a rotating shaft; when the rotary valve rotates to the locking position, the protrusion on the end face of the rotary valve exerts external force on the one-way valve, the one-way valve moves, the spring in the extension state arranged on the one-way valve is compressed, and the filtering waterway is communicated. The joint and the PE pipe are not connected in the whole filtering waterway, the joint is not required to be manually sorted on site, the assembly process is rapid, the abrasion of parts is less, the possibility of water leakage can be effectively reduced, and the user experience is improved.

Description

Water treatment device

Technical Field

The invention relates to the technical field of water purifying equipment, in particular to a water processor.

Background

In the prior art, water purification devices, especially domestic water treatment devices or domestic water treatment devices, are usually connected by fitting a PE pipe with a pipe joint. Particularly, including filter flask, filter flask base and other water routes triplex, wherein the filter flask is connected with the filter flask base, and the filter flask base is connected with other water routes, connects through the sealing washer sealed, and filter flask and other water routes are connected as the intermediate part through the filter flask base. The type of required pipeline joint is more in whole structure, needs the PE pipe of different length simultaneously, and such waterway structure can bring a lot of inconveniences for production, and the production installation field needs the manual work to distinguish the material many times.

More importantly, if the connection between the PE pipe and the pipeline joint is not in place, water leakage of the water purifying equipment occurs, and the use experience of a user is seriously influenced. In the production process, more manual operations are needed for inserting the pipelines, and the probability of the problem that the pipelines are inserted wrongly or not inserted in place is high. In the processes of after-sale, maintenance or replacement of filter bottles and the like, pipelines of the water purifying equipment also need to be plugged and pulled for many times, and the pipeline joints are easy to wear, so that water leakage is caused.

Disclosure of Invention

Aiming at the problem of pipeline connection mode in water purification equipment in the prior art, the invention aims to design and disclose a novel water treatment device, in particular to a water treatment device for washing.

The invention provides a water processor, which comprises a filter flask and a filter flask base, wherein the filter flask is connected with the filter flask base, a filter element is arranged in the filter flask, and a water inlet and a water outlet which are communicated with a filter water path and a water source are formed in the filter flask base; the filtering waterway is connected with the filtering bottle and the filtering bottle base and also comprises a rotary valve and a one-way valve, the rotary valve and the one-way valve are sequentially arranged from bottom to top, the rotary valve is arranged in the filtering bottle base, the one-way valve is arranged in the filtering bottle, and the rotary valve rotates relative to the filtering bottle base by taking the axis of the filtering bottle as a rotating shaft; when the rotary valve rotates to the locking position, the protrusion on the end face of the rotary valve applies external force on the one-way valve, the one-way valve moves, the spring in the extension state arranged on the one-way valve is compressed, and the filtering water path is communicated.

Furthermore, a water outlet pipeline and a water inlet pipeline are arranged at the bottom end of the filter bottle, a water inlet check valve and a water outlet check valve are correspondingly and respectively arranged in the water outlet pipeline and the water inlet pipeline, and a central pipe is arranged in the center of the filter bottle; the filter bottle is characterized by further comprising a shunt valve, wherein the shunt valve is arranged in the filter bottle and is respectively communicated with the water inlet pipeline, the water outlet pipeline and the central pipe.

Furthermore, the rotating shaft of the rotary valve is formed on the lower end face of the rotary valve, a hollow joint is formed on the upper end face of the rotary valve, the protrusion is arranged in the center of the hollow joint, and the water inlet pipeline and the water outlet pipeline are respectively inserted into the hollow joint.

Furthermore, a filter bottle mounting position is arranged in the filter bottle base, a convex side mounting part is formed on the inner wall of the filter bottle mounting position, a concave side mounting part is formed at the lower end of the filter bottle, when the filter bottle is connected with the filter bottle base, the filter bottle is embedded into the filter bottle mounting position, and the convex side mounting part is embedded with the concave side mounting part; the center of the filter bottle mounting position is provided with a center hole, and a rotating shaft arranged on the lower end face of the rotating valve extends into the center hole.

Furthermore, a first limiting part is arranged on the convex side mounting part, a second limiting part is arranged on the concave side mounting part, and when the rotary valve rotates to the locking position, the second limiting part is embedded into the first limiting part; the convex side installation part is further provided with a third limiting part, the second limiting part is provided with a notch, and the third limiting part is embedded into the notch when the filter flask is connected with the filter flask base.

Further, still include the clamp plate, rotary valve, filter bottle base pass through the bolt from top to bottom in proper order detachably fixed connection.

Furthermore, the filter core includes resin and PP composite filter core, the filter core encircles the center tube sets up, and rivers flow through in proper order PP composite filter core and resin collect after the filter flask top certainly the center tube flows out.

Further, a support upper cover and a support lower cover are arranged in the filter bottle, a PP composite filter element and resin are arranged between the support upper cover and the support lower cover, and the PP composite filter element is arranged on the outer side of the resin; and resin is arranged above the supporting upper cover.

Furthermore, the filter bottle comprises a cold water filter bottle and a hot water filter bottle, the cold water filter bottle is communicated with a tap water pipeline, and the hot water filter bottle is communicated with a water outlet pipe of the water heater.

Furthermore, a hot water inlet and a hot water outlet which are communicated with the hot water filtering waterway and the water heater are formed in the filtering bottle base, and a cold water inlet and a cold water outlet which are communicated with the cold water filtering waterway and tap water are also formed in the filtering bottle base; the hot water inlet and the hot water outlet are respectively positioned above the cold water inlet and the cold water outlet.

In the water treatment device disclosed by the invention, the condition that the joint is connected with the PE pipe does not exist in the whole filtering water channel, the joint does not need to be subjected to partial labor in the assembling, installing and maintaining fields, the assembling process is quick, the abrasion to components is less, the water leakage possibility of the water treatment device can be effectively reduced, and the user experience of the water treatment device is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a water treatment apparatus according to an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a longitudinal cross-sectional view of the water treatment apparatus shown in FIG. 1, as seen from the front;

FIG. 5 is a longitudinal sectional view showing a connection structure of a filter flask and a base of the filter flask in the water treatment apparatus shown in FIG. 1;

FIG. 6 is a schematic top view of the base of the filter bottle;

FIG. 7 is a schematic view showing the construction of a filter flask of the water treatment apparatus shown in FIG. 1;

FIG. 8 is an exploded view of FIG. 7;

fig. 9 is a cross-sectional view of the filter flask of fig. 7.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 to 6 are schematic structural views of a water treatment apparatus according to an embodiment of the present invention. As shown in the figure, the water processor 10 disclosed by the invention comprises a filter bottle 1 and a filter bottle base 3, wherein the filter bottle 1 is arranged on the filter bottle base 3 to form a water path connection between the filter bottle 1 and the filter bottle base 3. A filter element is arranged in the filter bottle 1, a water inlet and a water outlet which are communicated with a filtering water path and a water source are arranged on the filter bottle base 3, and a reinforcing rib 31 is arranged on the outer side of the filter bottle base 3. In this embodiment, the filtering water path refers to a water path through which raw water flows in, passes through the filter element, and flows out of the purified water, and the water treatment device disclosed in this embodiment is provided with two filter bottles, namely a cold water filter bottle 30-2 and a hot water filter bottle 30-1, wherein a water source of the cold water filter bottle 30-2 is domestic or domestic tap water, a water source of the hot water filter bottle 30-1 is water heated by a water heater, and the water heater may be any one of an electric water heater, a gas water heater, an air source heat pump water heater, and an instant electric water heater, which is not limited herein. By adopting the water treatment device disclosed by the embodiment, the purified water with different temperatures can be obtained by filtering the raw water with different temperatures, and the mixed water can be mixed again at the downstream of the filter bottle to obtain the purified water with proper temperature. The filter bottle base 3 is provided with a hot water inlet 32, a hot water outlet 33, a cold water inlet 34 and a cold water outlet 35 which are respectively connected with a water source through pipelines. According to the water consumption habit of users, the water consumption habit of the users is generally more cold water and less hot water, the volume and the length of the hot water filter element are smaller than those of the cold water filter element, the positions of the hot water inlet 32, the hot water outlet 33 and the hot water filter bottle 1-2 are preferably higher than those of the cold water inlet 34, the cold water outlet 35 and the cold water filter bottle 1-1, and meanwhile, the filter bottle base 3 is arranged to form a two-layer waterway structure which is independent in isolation. Of course, only one filter bottle can be arranged to filter raw water with single temperature.

Taking a water treatment device provided with a cold water filter flask 1-1 and a hot water filter flask 1-2 as an example, specifically describing the internal structure of the water treatment device disclosed by the invention, as shown in the figure, after raw water enters a filter flask base 3, the raw water respectively flows into the cold water filter flask 1-1 and the hot water filter flask 1-2 through independent filtering water paths, and is filtered by filter cores in the cold water filter flask 1-1 and the hot water filter flask 1-2 to form purified water, and the purified water flows into the filter flask base 3 again and flows out of the filter flask base 3 from corresponding outlets on the filter flask base 3. In order to control the on-off of the filtering water paths in the installation and use processes, rotary valves 1-9 and one-way valves 1-16 are sequentially arranged in each filtering water path, the rotary valves 1-9 and the one-way valves 1-16 are sequentially arranged from bottom to top, namely the one-way valves 1-16 are arranged at the downstream of the rotary valves 1-9. The one-way valves 1-16 are arranged in the filter bottle 1, and when the filter bottle is not in use, the one-way valves 1-16 block a water path flowing into the filter bottle 1. A filter bottle mounting position 30 is arranged on the filter bottle base 3, the labels of the filter bottles corresponding to the cold water filter bottle 1-1 and the hot water filter bottle 1-2 are respectively 30-1 and 30-2, and a rotary valve 1-9 is arranged at the bottom of the filter bottle mounting position 30. When the filter bottle is installed, the lower part of the filter bottle 1 extends into the filter bottle installation position 30, the rotary valve 1-9 rotates relative to the filter bottle base 3 by taking the axis of the filter bottle 1 as a rotating shaft to drive the filter bottle 1 to be in a locking position, the protrusions 1-11 arranged on the end face of the rotary valve 1-9 exert upward external force on the one-way valves 1-16, the one-way valves 1-16 move upward under the action of the protrusions 1-11, the springs 1-24 arranged on the one-way valves 1-16 in an extension state are compressed under the external force formed by the protrusions 1-11, the valve core is opened to conduct the filtering waterway, and the water processor is in a working state. If the filter bottle is in an uninstalled state, the springs 1 to 24 on the one-way valves 1 to 16 are restored, the one-way valves 1 to 16 act, and the valve core is closed to cut off the filtering waterway.

The rotary action of the rotary valve 1-9 is realized by the matching of the rotary shaft 1-13 arranged on the lower end surface of the rotary valve 1-9 and a central hole 39 arranged at the center of the bottom of the filter flask installation position 30, and the central hole 39 is arranged on the central shaft of the filter flask 1. The rotating shaft 1-13 extends into the central hole 19, so that the rotating valve 1-9 rotates by taking the axis of the filter flask 1 as the rotating shaft to complete the assembly of the filter flask. The upper end face of the rotary valve 1-9 is provided with a hollow joint 1-10, a bulge 1-11 for driving the one-way valve 1-16 to act is arranged at the center of the hollow joint 1-10, and the hollow joint 1-10 is communicated with a water flow channel formed inside the filter bottle base 3. Referring to fig. 6, the protrusions 1-11 in the hollow joints 1-10 are formed by a plurality of brackets which extend vertically upward toward the filter flask and converge at the top to form a protrusion with a cross-shaped top section. The cross-shaped end face can ensure that the external force of the bulges 1-11 acting on the end faces of the one-way valves 1-16 is uniform, and meanwhile, the hollow support does not block water flow. For the filter bottle 1, the water inlet pipeline 1-5 and the water outlet pipeline 1-6 arranged at the bottom of the filter bottle 1 are respectively inserted into the two hollow joints 1-10, as shown in fig. 7-9, the water inlet pipeline 1-5 and the water outlet pipeline 1-6 are respectively provided with a water inlet check valve 1-22 and a water outlet check valve 1-23, and the protrusions 1-11 in the two hollow joints 1-10 respectively form external forces acting on the water inlet check valve 1-22 and the water outlet check valve 1-23 to drive the water inlet check valve 1-22 and the water outlet check valve 1-23 to act, so as to conduct the water inlet branch and the water outlet branch in the filter waterway.

Locking the filter flask in the installed use position is accomplished by a set of mating male side mounts 36 and female side mounts 1-3. The convex side mounting part 36 is arranged on the inner wall of the filter bottle mounting position 30, the convex side mounting part 1-3 is an annular rib position which extends inwards along the radial direction of the filter bottle mounting position 30 along the filter bottle mounting position 30 and protrudes out of the surface of the inner wall, the concave side mounting part 1-3 is a structure which extends inwards along the radial direction of the filter bottle 1 and is inwards sunken relative to the outer wall of the filter bottle 1, when the filter bottle is mounted, part of the filter bottle 1 is embedded into the filter bottle mounting position 30, and the convex side mounting part 36 and the concave side mounting part 1-3 are mutually embedded. The water inlet pipeline 1-5 and the water outlet pipeline 1-6 on the filter flask 1 are respectively inserted into the hollow joints 1-10 of the rotary valves 1-9, and the rotary valves 1-9 rotate relative to the filter flask installation position. The convex side mounting portion 36 is provided with a first stopper portion 37, and the concave side mounting portion 1-3 is provided with a second stopper portion 1-4. When the rotary valve 1-9 is rotated to the locking position, the second limiting part 1-4 is embedded into the first limiting part 36, the position of the rotary valve 1-9 is locked, and the filter bottle is limited to move along the axial direction of the filter bottle. For the convenience of installation, a third limiting part 40 is further disposed on the convex side mounting part 36, and notches (not shown) are formed on the second limiting parts 1-4. The third limiting part 40 is used for marking the installation position of the filter bottle 1, and the matching position of the notch and the third limiting part 40 is used as the installation starting position of the filter bottle 1.

The rotary valves 1-9 are fixedly mounted in the filter flask mounting locations 30. As shown, the mounting of the rotary valves 1-9 is accomplished by the pressure plates 1-8. The pressing plates 1-8 are in annular plate-shaped structures. The pressing plate 1-8, the rotary valve 1-9 and the bottom surface of the filter bottle mounting position are detachably connected from top to bottom in sequence through bolts. Four or two bolts can be arranged and are evenly distributed on the pressure plates 1-8. Sealing rings 1-12 are arranged between the outer edges of the rotary valve bodies 1-9 and the filter bottle mounting positions 30, and sealing rings 1-7 are also arranged between the hollow joints 1-11 of the rotary valve and the water inlet pipelines 1-5 and the water outlet pipelines 1-6, so that the overall sealing performance of the equipment is improved. The filter flask that rotary valve, check valve, clamp plate formed and the connection of filter flask base need not set up independent joint in the whole water route to and through articulate's PE pipe, the installation of filter flask and filter flask base need not the manual work and carry out the go-no-go to the go out the separate inspection through the realization that rotary valve and water inlet pipe, outlet conduit's connection are light. The whole assembly structure is easy to disassemble, is not easy to wear after long-time use, and has low possibility of water leakage.

The filter flask used in the present invention will be described in detail below. In order to be matched with a specially designed mounting structure on the base of the filter bottle disclosed by the invention, the bottom end of the filter bottle 1 disclosed by the invention is provided with a water inlet pipeline 1-5 and a water outlet pipeline 1-6, and the water inlet pipeline 1-5 and the water outlet pipeline 1-6 extend downwards. The water inlet pipeline 1-5 is provided with a water inlet one-way valve 1-22, and the water outlet pipeline 1-6 is provided with a water outlet one-way valve 1-23. The water inlet pipeline 1-5 and the water outlet pipeline 1-6 are arranged on the filter bottle cap 1-15. In order to fully filter raw water, the filter element 2 arranged in the filter bottle 1 is divided into two parts, the first part comprises PP composite filter elements 2-3 and resin 2-2 which are arranged in a layered mode, and the PP composite filter elements 2-3 are arranged on the outer side of the resin 2-2 and surround the resin. The second part is resin 2-1. As shown in fig. 7 to 9, the first portion of the cartridge is disposed between the support upper cover 1-20 and the support lower cover 1-18. The second part of the filter cartridge is arranged above the support cover 1-20. Raw water flowing in from the one-way valves 1-22 of the water inlet pipelines 1-5 flows through the support lower covers 1-18 through the shunt valves 1-17, flows into the PP composite filter elements 2-3 from two sides of the PP composite filter elements 2-3, then flows through the resin 2-2, and flows through the support upper covers 1-20 above to continue flowing upwards. Another part of the resin 2-1 of the filter element is arranged above the supporting upper cover 1-20. The PP composite filter element 2-3 plays a role in filtering impurities in water, and the resins of the two parts soften the water, so that the purified water can protect the skin of a human body. The clean water flowing through the supporting upper cover 1-20 flows into the water collecting cover 1-21 above the filter flask from two sides of the supporting upper cover 1-20, flows downwards to the water outlet of the water diversion valve 1-17 along the central pipe 1-19 arranged at the center of the filter flask 1 and surrounded by the filter element, further flows out to the filter flask base 3 through the water outlet one-way valve 1-23 in an open state through the water outlet pipeline 1-6 communicated with the water diversion valve 1-17, and flows out from the water outlet through the water channel in the filter flask base 3. Two sealing rings are arranged between the outer walls of the lower ends of the central pipes 1 to 19 and the shunt valves 1 to 17, so that the separation of a water path is realized, and the mixing of inlet water and outlet water is avoided. In this embodiment, the structures of the cold water filter flask 1-1 and the hot water filter flask 1-2 are substantially identical, and thus, they will not be described separately.

According to the filter bottle described in the embodiment, the water inlet passage and the water outlet passage are completely isolated in the bottle, the water passage flows in a single direction, and purified water with good water quality suitable for human bodies can be obtained after purification and softening from bottom to top. Moreover, in the production process of the filter element, an inverted mode is preferably adopted, resin is arranged below the filter element, a filter bottle cover and a filter bottle are welded and fixed through spin welding after the PP composite filter element is installed, the resin can be well packaged in the filter bottle, and the problem of leakage cannot occur.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A water processor comprises a filter flask and a filter flask base, wherein the filter flask is connected with the filter flask base, a filter element is arranged in the filter flask, and a water inlet and a water outlet which are communicated with a filter water path and a water source are formed in the filter flask base; the automatic filter is characterized in that the filtering water path is connected with the filtering bottle and the filtering bottle base, and further comprises a rotary valve and a one-way valve, the rotary valve and the one-way valve are sequentially arranged from bottom to top, the rotary valve is arranged in the filtering bottle base, the one-way valve is arranged in the filtering bottle, and the rotary valve rotates relative to the filtering bottle base by taking the axis of the filtering bottle as a rotating shaft; when the rotary valve rotates to a locking position, a bulge on the end face of the rotary valve applies external force on the one-way valve, the one-way valve moves, a spring in an extension state arranged on the one-way valve is compressed, and the filtering water path is communicated; a hollow joint is formed on the upper end surface of the rotary valve, the bulge is arranged in the center of the hollow joint, and the hollow joint is communicated with a water flow channel formed in the filtering bottle base; the bulge consists of a plurality of brackets, and the brackets vertically extend upwards in the direction towards the filter bottle and are converged at the top to form a cross-shaped bulge; the filter bottle base is internally provided with a filter bottle mounting position, a convex side mounting part is formed on the inner wall of the filter bottle mounting position, the convex side mounting part is an annular rib position which extends inwards along the radial direction of the filter bottle mounting position and protrudes out of the surface of the inner wall, and the concave side mounting part is a structure which extends inwards along the radial direction of the filter bottle and is inwards sunken relative to the outer wall of the filter bottle; when the filter bottle is connected with the filter bottle base, the filter bottle is embedded into a filter bottle mounting position, a central hole is formed in the center of the filter bottle mounting position, and a rotating shaft arranged on the lower end face of the rotating valve extends into the central hole; the convex side mounting part is embedded with the concave side mounting part; a water inlet pipeline and a water outlet pipeline on the filter flask are respectively inserted into the hollow joint of the rotary valve, and the rotary valve rotates relative to the installation position of the filter flask; the convex side mounting part is provided with a first limiting part, the concave side mounting part is provided with a second limiting part, and when the rotary valve rotates to a locking position, the second limiting part is embedded into the first limiting part to lock the position of the rotary valve; the convex side installation part is further provided with a third limiting part, the second limiting part is provided with a notch, the third limiting part is used for marking the installation position of the filter bottle, and the matching position of the notch and the third limiting part is used as the installation starting position of the filter bottle.

2. The water processor as claimed in claim 1, wherein a water outlet pipeline and a water inlet pipeline are arranged at the bottom end of the filter bottle, a water inlet check valve and a water outlet check valve are correspondingly arranged in the water outlet pipeline and the water inlet pipeline respectively, and a central pipe is arranged at the center of the filter bottle; the filter bottle is characterized by further comprising a shunt valve, wherein the shunt valve is arranged in the filter bottle and is respectively communicated with the water inlet pipeline, the water outlet pipeline and the central pipe.

3. The water treatment device according to claim 2, further comprising a pressure plate, wherein the pressure plate, the rotary valve and the filter bottle base are sequentially detachably and fixedly connected from top to bottom through bolts.

4. The water treatment device according to claim 2, wherein the filter element comprises a resin and a PP composite filter element, the filter element is arranged around the central tube, and water flows through the PP composite filter element and the resin in sequence, is collected above the filter bottle and then flows out of the central tube.

5. The water treatment device according to claim 4, wherein a support upper cover and a support lower cover are arranged in the filter bottle, a PP composite filter element and resin are arranged between the support upper cover and the support lower cover, and the PP composite filter element is arranged outside the resin; and resin is arranged above the supporting upper cover.

6. The water treatment device according to claim 5, wherein the filter bottle comprises a cold water filter bottle and a hot water filter bottle, the cold water filter bottle is communicated with a tap water pipeline, and the hot water filter bottle is communicated with a water outlet pipe of a water heater.

7. The water treatment device according to claim 6, wherein the filter bottle base is provided with a hot water inlet and a hot water outlet which are communicated with the hot water filtering waterway and the water heater, and is also provided with a cold water inlet and a cold water outlet which are communicated with the cold water filtering waterway and the tap water; the hot water inlet and the hot water outlet are respectively positioned above the cold water inlet and the cold water outlet.