CN110701358A

CN110701358A - Water inlet valve assembly and water heater

Info

Publication number: CN110701358A
Application number: CN201810756870.XA
Authority: CN
Inventors: 江渝; 王明
Original assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Wuhu Midea Kitchen and Bath Appliances Manufacturing Co Ltd
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2020-01-17
Anticipated expiration: 2038-07-09

Abstract

The invention discloses a water inlet valve assembly and a water heater, wherein the water inlet valve assembly is used for being installed at a water inlet of the water heater, and comprises the following components: the water inlet valve body comprises a valve body and a valve core, the valve core is arranged on the valve body and used for controlling the valve body to be conducted or closed, and the peripheral wall of the valve body is provided with an installation hole; and the scale inhibition device comprises a shell and a scale inhibitor arranged in the shell, wherein the shell extends into the valve body from the mounting hole, the shell is connected with the valve body in a sealing manner, the part of the shell, which is positioned in the valve body, is provided with a water through hole, and the water through hole is used for facing the scale inhibitor released in the valve body. According to the technical scheme, the water inlet valve and the scale inhibition device are assembled together, so that waste of water resources can be avoided when the scale inhibitor is added.

Description

Water inlet valve assembly and water heater

Technical Field

The invention relates to the field of water heaters, in particular to a water inlet valve assembly and a water heater.

Background

During the operation of the water heater, impurities (such as large particles, dirt and the like) are accumulated in the inner container of the water heater frequently. Generally, a scale inhibitor is often arranged in an inner container of a water heater, and the scale inhibitor and certain elements or substances or impurities in water undergo physical or chemical reaction, so that the formation of scale inhibition in water is reduced.

The existing scale inhibition device is generally directly installed on the inner container, namely, a mounting hole is independently formed on the inner container, the scale inhibition device is placed into the inner container from the mounting hole, and then the mounting hole is sealed. However, since the scale inhibitor in the scale inhibition device is gradually consumed over time, the scale inhibition device needs to be taken out frequently to supplement the scale inhibitor. In the existing installation mode, in order to take out the scale inhibition device, the installation hole of the inner container needs to be opened, water is often filled in the inner container, and when the installation hole is opened, the water in the inner container flows out, so that waste of water resources is caused.

Disclosure of Invention

The invention mainly aims to provide a water inlet valve assembly, aiming at installing a scale inhibition device on a water inlet valve so as to avoid waste of water resources when scale inhibitors are added.

In order to achieve the above object, the present invention provides a water inlet valve assembly for being installed at a water inlet of a water heater, the water inlet valve assembly comprising:

the water inlet valve body comprises a valve body and a valve core, the valve core is arranged on the valve body and used for controlling the valve body to be conducted or closed, and the peripheral wall of the valve body is provided with an installation hole; and the number of the first and second groups,

antisludging equipment, include the shell and locate antisludging agent in the shell, the shell certainly the mounting hole stretches into in the valve body, just the shell with valve body sealing connection, being located of shell the part in the valve body is equipped with the water hole, it is used for court to cross the water hole release antisludging agent in the valve body.

Optionally, the shell includes handle portion and the portion of stretching into, handle portion with the portion of stretching into all is the tube-shape setting, the one end of handle portion is closed, and the other end is uncovered setting, it is uncovered to stretch into one end, and the other end is equipped with the shielding piece, handle portion's opening end with the opening end of the portion of stretching into cup joints, handle portion at least part shows outside the valve body, just handle portion with the connection can be dismantled to the valve body, the portion of stretching into stretch into in the valve body, just be equipped with on the perisporium of the portion of stretching into the water hole.

Optionally, the outer circumferential surface of the handle portion is provided with an external thread, and the hole wall of the mounting hole is provided with an internal thread screwed with the external thread.

Optionally, the outer circumferential surface of the handle portion is provided with a stopping protrusion, and the stopping protrusion abuts against the outer circumferential surface of the valve body.

Optionally, the handle portion is sleeved with a sealing ring, and the sealing ring is in sealing abutment with the hole wall of the mounting hole.

Optionally, a limiting ring rib is arranged on the outer circumferential surface of the handle portion, and a limiting ring groove matched with the limiting ring rib is arranged on the inner circumferential surface of the extending portion.

Optionally, the outer circumferential surface of the extending portion is provided with an anti-rotation rib, the inner wall of the valve body is correspondingly provided with an anti-rotation groove, and the anti-rotation rib is matched with the anti-rotation groove in an inserting mode.

Optionally, the stretching part comprises two annular frameworks arranged at intervals and a plurality of strip frameworks connected with the two annular frameworks, and the two adjacent strip frameworks are arranged at intervals to form the water passing hole.

Optionally, still be equipped with the filter screen in the portion of stretching into, the filter screen covers the hole setting of valve body.

Optionally, a limiting rib is arranged in the stretching part, the limiting rib extends along the axis of the stretching part and is close to the inner circumferential surface of the stretching part, the filter screen extends along the circumferential wall of the stretching part, and the filter screen is located between the limiting rib and the inner surface of the stretching part.

Optionally, the scale inhibition device further comprises a magnetic rod, and the magnetic rod is arranged in the shell.

The invention also provides a water heater, which comprises an inner container and a water inlet valve assembly, wherein the inner container is provided with a water inlet, the water inlet valve assembly is arranged at the water inlet, and the water inlet valve assembly comprises:

In the invention, the scale inhibition device is arranged on the valve body of the water inlet valve body, which is equivalent to the fact that the scale inhibition device and the water inlet valve are integrated together to form an integral module, so that when the scale inhibition device is arranged, the scale inhibition device and the water inlet valve are only required to be arranged, and the scale inhibition device and the water inlet valve are not required to be arranged independently, so that the installation steps of the water inlet valve body, the scale inhibition device and the water heater can be simplified. In addition, because the scale inhibition device is integrated on the water inlet valve and is positioned outside the inner container of the water heater, when the scale inhibitor needs to be added, the connection between the water inlet valve and the inner container is unchanged, the scale inhibition device only needs to be taken down from the water inlet valve, and the whole part does not need to be taken out from the inner container, so that the abrasion between the water inlet valve assembly and the inner container can be reduced, and the sealing reliability between the water inlet valve assembly and the inner container is ensured. Moreover, when the scale inhibition device is taken down, the water inlet valve is closed, water in the inner container cannot flow out, so that users cannot be wetted, and waste of water resources cannot be caused.

Drawings

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

FIG. 1 is a schematic diagram of a structure of an embodiment of a fill valve assembly of the present invention;

FIG. 2 is a cross-sectional view of the intake valve assembly of FIG. 1;

FIG. 3 is a schematic view of the handle portion of FIG. 1;

FIG. 4 is a cutaway schematic view of the handle portion of FIG. 3;

FIG. 5 is a cross-sectional view of the housing of FIG. 2;

FIG. 6 is a schematic structural view of the housing of FIG. 2;

FIG. 7 is a schematic view of the structure of the inlet portion of FIG. 2;

FIG. 8 is a cross-sectional view of the inlet portion of FIG. 7;

fig. 9 is a schematic plan view of the inlet portion of fig. 7.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a water heater, and particularly relates to a water heater which can be an electric water heater, a gas water heater or a solar water heater and the like.

In the embodiment of the invention, the water heater can comprise an inner container, wherein the inner container is provided with a water inlet and a water outlet, the water inlet is provided with a water inlet valve component, and the water outlet is provided with a water outlet valve component. As shown in fig. 1, in the embodiment of the present invention, the water inlet valve assembly includes a water inlet valve body 10 and a scale inhibiting device 20.

Referring to fig. 2, the inlet valve body 10 includes a valve body 11 and a valve core 12, and the valve core 12 is mounted on the valve body 11 for controlling the valve body 11 to open or close. The valve body 11 is substantially cylindrical in shape for the passage of water. The water inlet end of the valve body 11 is communicated with a water inlet pipe, for example, a thread can be arranged on the water inlet end of the valve body 11 for connecting the water inlet pipe; the water outlet end of the valve body 11 is connected with the water inlet of the inner container or the water inlet end of the heat exchange pipeline. The valve core 12 may be a manual valve core or an electric valve core, that is, the inlet valve body 10 may be a manual valve or a solenoid valve. The valve core 12 can control the valve body 11 to be opened or closed so as to control the water flow.

The scale inhibitor 20 comprises a housing 21 (shown in fig. 5) and a scale inhibitor 213 disposed in the housing 21, wherein a mounting hole (not shown) is formed in a peripheral wall of the valve body 11, the housing 21 extends into the valve body 11 from the mounting hole, and the housing 21 is hermetically connected with the valve body 11 to prevent water in the valve body 11 from leaking out of a connection between the housing 21 and the valve body 11. The part of the housing 21 inside the valve body 11 is provided with water through holes 212a (as shown in fig. 7), the water through holes 212a are used for releasing the small-particle scale inhibitor 213 into the valve body 11, when water flows through the housing 21, the water flows into the housing 21 from the water through holes 212a on the housing 21, so that the scale inhibitor 213 is soaked by the water and slowly releases the small-particle scale inhibitor 213 out, and the small-particle scale inhibitor 213 is dissolved in the water, flows out from the water through holes 212a along with the water, and flows to the water outlet end of the valve body 11. The scale inhibitor 213 can react physically or chemically with certain elements or substances or impurities in the water, thereby reducing the formation of scale in the water.

In the embodiment of the invention, the valve core 12 is arranged at the water outlet end of the valve body 11, and the scale inhibition device 20 is arranged at the water inlet end of the valve body 11; of course, the anti-scaling device 20 may also be mounted at the water outlet end of the valve body 11.

In the invention, the scale inhibition device 20 is arranged on the valve body 11 of the water inlet valve body 10, which is equivalent to the scale inhibition device 20 and the water inlet valve are integrated together to form an integral module, so that when the scale inhibition device is arranged, only the valve body 11 and the inner container of the water heater are required to be arranged, and the water inlet valve body 10 and the scale inhibition device 20 are not required to be separately arranged on the inner container of the water heater, thereby simplifying the installation steps of the water inlet valve body 10, the scale inhibition device 20 and the water heater. In addition, because the scale inhibition device 20 is integrated on the water inlet valve and is positioned outside the inner container of the water heater, when the scale inhibitor 213 needs to be added, the connection between the water inlet valve and the inner container is not changed, only the scale inhibition device 20 needs to be taken down from the water inlet valve, and the whole part does not need to be pulled away from the inner container, so that the abrasion between the water inlet valve assembly and the inner container can be reduced, and the sealing reliability between the water inlet valve assembly and the inner container is ensured. Moreover, when the scale inhibition device 20 is taken down, the water inlet valve is closed, water in the inner container cannot flow out, users cannot be wetted, and waste of water resources cannot be caused.

In this embodiment, the housing 21 includes the handle portion 211 and stretches into the portion 212, and the handle portion 211 all is the tube-shape setting with stretching into the portion 212, and the one end of handle portion 211 is closed, and the other end is uncovered setting, and it is uncovered to stretch into portion 212 one end, and the other end is equipped with the shielding piece, and the open end of handle portion 211 cup joints with the open end that stretches into the portion 212. Specifically, the scale inhibitor 213 may be placed in the inner space of the handle 211 or the extending portion 212, and then the handle 211 and the extending portion 212 may be sleeved together to prevent the scale inhibitor 213 from falling out. The other end of the extending portion 212 is provided with a shielding member, which can prevent the scale inhibitor 213 from falling out, specifically, the shielding member can be a plurality of shielding ribs 2124 (as shown in fig. 7) arranged in a staggered manner, or the shielding member is a shielding cover and is arranged to completely cover the other end of the extending portion 212. In this embodiment, the extending portion 212 is used as a water passing element, so that the extending portion 212 extends into the valve body 11, and the peripheral wall of the extending portion 212 is provided with a water passing hole 212 a. The handle portion 211 serves as a gripping member, so that the handle portion 211 is at least partially exposed outside the valve body 11 for gripping by a user. The handle portion 211 is sealingly connected to the valve body 11 to prevent water from flowing out, and one end of the handle portion 211 is closed to prevent water from flowing out of the valve body 11 as well. In other embodiments, the housing 21 may include a cover plate and a cylinder body having one end open and the other end closed, the cover plate covering the open end of the cylinder body.

Since the scale inhibitor 213 is slowly released, it is necessary to frequently add the scale inhibitor 213 or replace the scale inhibition device 20, and therefore, in this embodiment, the handle portion 211 is detachably connected to the valve body 11, the handle portion 211 can be taken out, and the insertion portion 212 is connected to the handle portion 211, so that the handle portion 211 and the insertion portion 212 can be taken out together, and after the scale inhibition device 20 is completely taken out, the handle portion 211 and the insertion portion 212 are separated, and the scale inhibitor 213 is added to the scale inhibition device 20.

Referring to fig. 3 and 4, the handle 211 and the valve body 11 may be detachably connected in various ways, for example, in some embodiments, the outer peripheral surface of the handle 211 is provided with an external thread 2111, and the wall of the mounting hole is provided with an internal thread (not labeled) screwed with the external thread 2111. After the handle portion 211 and the protruding portion 212 are assembled, the protruding portion 212 is protruding into the valve body 11, and the handle portion 211 is rotated so that the internal thread and the external thread 2111 are screwed together. To prevent slippage during rotation, the outer circumferential surface of the handle portion 211 may be provided with anti-slip projections. In other embodiments, two or more ear plates may be disposed on the outer peripheral surface of the handle portion 211, screw holes are disposed on the ear plates, and studs are disposed on the outer peripheral surface of the valve body 11, and the screw holes on the ear plates are butted against the screw holes on the studs and locked by screws.

Further, a sealing ring 214 is provided around the handle portion 211, and the sealing ring 214 is in sealing contact with the hole wall of the mounting hole to prevent water leakage from the valve body 11. In order to prevent the movement of the packing 214 along the axial direction of the handle portion 211, a receiving ring groove 211a is formed in the outer peripheral surface of the handle portion 211, and the packing 214 is disposed in the receiving ring groove 211a, so that the groove wall of the receiving ring groove 211a blocks the packing 214, and the movement of the packing 214 can be restricted.

In order to prevent the handle 211 from moving excessively towards the inside of the valve body 11 and pressing the inner circumferential wall of the valve body 11, the stop protrusion 2112 is provided on the outer circumferential surface of the handle 211, and the stop protrusion 2112 abuts against the outer circumferential surface of the valve body 11, so that the handle 211 can be prevented from moving further inwards and pressing the inner circumferential wall of the valve body 11 after the stop protrusion 2112 abuts against the outer circumferential surface of the valve body 11 in the process of inward rotation of the handle 211. The stopping protrusion 2112 may be annular, or the stopping protrusion 2112 may be multiple, and multiple stopping protrusions 2112 are provided at intervals along the circumference of the handle portion 211, for example, two, four, or five stopping protrusions 2112, etc.

Referring to fig. 4 to 8, in the embodiment of the present invention, the handle portion 211 and the extending portion 212 are detachably connected, so that the scale inhibitor 213 is more conveniently added. Specifically, the outer peripheral surface of the handle portion 211 is provided with a stopper ring rib 2113, and the inner peripheral surface of the protruding portion 212 is provided with a stopper ring groove 212b that fits with the stopper ring rib 2113. The engagement of the retainer ring ribs 2113 and the retainer ring grooves 212b can limit the axial outward movement of the handle portion 211 along the protruding portion 212 away from connection with the protruding portion 212. In order to facilitate the limit ring rib 2113 to slide into or out of the limit ring groove 212b, the opening of the limit ring groove 212b is arranged in a gradually expanding manner, so that the groove wall of the limit ring groove 212b forms a guide surface, and the limit ring rib 2113 can slide along the guide surface; in addition, the thickness of the stopper ring rib 2113 becomes gradually smaller in the projecting direction along the stopper ring rib 2113, that is, the thickness of the end of the stopper ring rib 2113 close to the handle portion 211 is larger than the thickness of the end remote from the handle portion 211. The positions of the stopper ring rib 2113 and the stopper ring groove 212b are interchangeable, that is, the stopper ring rib 2113 is provided in the protruding portion 212, and the stopper ring groove 212b is provided in the handle portion 211.

Referring to fig. 7 again, in order to prevent the extending portion 212 from rotating in the valve body 11, an anti-rotation rib 2121 is disposed on an outer circumferential surface of the extending portion 212, an anti-rotation groove (not labeled) is correspondingly disposed on an inner wall of the valve body 11, and the anti-rotation rib 2121 is adapted to the anti-rotation groove for insertion. When the handle part 211 rotates, the limit ring rib 2113 on the handle part 211 rotates in the limit ring groove 212b on the extending part 212, and the limit ring rib 2113 is always clamped in the limit ring groove 212 b; since the anti-rotation rib 2121 is caught in the anti-rotation groove, the protruding portion 212 is not rotated, and the protruding portion 212 is merely moved outward or inward along with the handle portion 211, so that the handle portion 211 brings the protruding portion 212 away from or into the valve body 11. In addition, the anti-rotation ribs 2121 and the anti-rotation grooves can also play a role in positioning, so that the extending portion 212 can be installed at an angle required by a user. Alternatively, the anti-rotation rib 2121 is provided near the open end of the protruding portion 212, so that the anti-rotation groove is located near the mounting hole, which facilitates processing of the anti-rotation groove. In this embodiment, two anti-rotation ribs 2121 are provided on the outer peripheral surface of the insertion portion 212, and the two anti-rotation ribs 2121 are spaced apart from each other in the circumferential direction of the insertion portion 212. Of course, in other embodiments, the number of the anti-rotation ribs 2121 may be one or more. In addition, the positions of the anti-rotation rib 2121 and the anti-rotation groove may be interchanged, that is, the anti-rotation groove is provided on the outer peripheral surface of the insertion portion 212, and the anti-rotation rib 2121 is correspondingly provided on the inner wall of the valve body 11.

In the embodiment of the present invention, the extending portion 212 is hollowed to form a plurality of water passing holes 212a, so that the blocking effect of the scale inhibition device 20 on the water flow can be reduced. Specifically, the extending portion 212 includes two annular frames 2122 arranged at intervals, and a plurality of strip-shaped frames 2123 connecting the two annular frames 2122, and the interval between two adjacent strip-shaped frames 2123 forms the water passing hole 212 a. For example, the number of the strip-shaped skeletons 2123 may be four, so that the space between two adjacent strip-shaped skeletons 2123 is larger, which is more favorable for the flow of water. In this embodiment, through will stretch into the structure that portion 212 set up to be the skeleton, be the screen tube shape for will stretch into the portion 212 setting, can enough guarantee to stretch into the structural strength of portion 212, and also can increase the aperture of water hole 212a, reduce blockking to rivers. Further, by providing the scale inhibitor 213 in a large block shape or a cylindrical shape, leakage of the block-shaped scale inhibitor 213 can be avoided. Further, a plurality of arc-shaped skeletons 2125 are further disposed on the extending portion 212, and the plurality of arc-shaped skeletons 2125 are spaced along the axial direction of the extending portion 212 and connected to two adjacent strip-shaped skeletons 2123. Specifically, a plurality of arc-shaped frames 2125 may be provided between any two adjacent strip-shaped frames 2123 so as to entirely surround the scale inhibitor 213, that is, the arc-shaped frames 2125 may have a circular ring shape and all the strip-shaped frames 2123 may be connected in sequence. Of course, the plurality of arc-shaped ribs 2125 may be provided only on the surface of the insertion portion 212 facing the water inlet end of the valve body 11, and the plurality of arc-shaped ribs 2125 may be provided at intervals in the axial direction of the insertion portion 212 and connected to the two adjacent bar-shaped ribs 2123. The provision of the arc-shaped frame 2125 can reduce the diameter of the water passing hole 212a, and thus can prevent the block-shaped scale inhibitor 213 from leaking from the surface of the insertion portion 212 facing the water inlet end of the valve body 11. In other embodiments, the protruding portion 212 may be disposed in a screen cylinder.

Referring to fig. 5 again, a filter screen 215 is further disposed in the extending portion 212, and the filter screen 215 is disposed to cover the inner hole of the valve body 11, so as to filter all water flowing through the valve body 11. And the filter screen 215 is arranged, so that the large scale inhibitor 213 can be prevented from leaking out of the filter screen 215. Optionally, the filtering net 215 extends along the peripheral wall of the extending part 212 and is disposed in an arc shape, and the filtering net 215 is disposed on the side of the extending part 212 close to the water outlet end of the valve body 11 to block the block-shaped scale inhibitor 213 from flowing to the water outlet end of the valve body 11; the arc-shaped frame 2125 is located on the side of the extending portion 212 close to the water inlet end of the valve body 11 to block the block-shaped scale inhibitor 213 from flowing to the water inlet end of the valve body 11. Of course, the filter screen 215 may be provided in a cylindrical shape, and may not be provided with the arc-shaped frame 2125 for blocking.

Referring to fig. 7 to 9, a limiting rib 2126 is disposed in the extending portion 212, and the limiting rib 2126 extends along an axis of the extending portion 212, is disposed near an inner circumferential surface of the extending portion 212, and is spaced from the inner circumferential surface of the extending portion 212. In this embodiment, two ends of the limiting rib 2126 are correspondingly connected to the two annular frameworks 2122, or one end of the limiting rib 2126 is connected to the shielding rib 2124, and the other end is connected to the annular framework 2122. The filter screen 215 extends along the peripheral wall of the extending part 212, the filter screen 215 is positioned between the limiting rib 2126 and the inner surface of the extending part 212, and the limiting rib 2126 can limit the filter screen 215 and prevent the filter screen 215 from moving along the axial direction of the valve body 11 under the impact of water flow.

The scale inhibitor 213 may be in the form of a tube, a block, or the like, and the block-shaped scale inhibitor 213 is generally large in order to prevent the scale inhibitor 213 from directly falling out of the water through holes 212a of the inlet portion 212. Generally, the scale inhibitor 213 is porous, and can supply water to flow from the inside of the scale inhibitor 213, and when the scale inhibitor 213 becomes small particles and is dissolved in water, the small particles can flow together with the water flow, so as to reduce the formation of scale in water.

Referring to fig. 2 again, further, the scale inhibition device 20 further includes a magnetic rod 216, and the magnetic rod 216 is disposed in the housing 21. In this embodiment, the magnetic rod 216 extends along the axial direction of the housing 21. By providing the magnetic rod 216, the magnetic rod 216 can absorb impurities in the water, so that the water source is purified. The number of the magnetic rods 216 is not limited, and may be set according to the user's needs and the size of the insertion portion 212.

The peripheral wall of valve body 11 is equipped with and extends flange 111, and the mounting hole sets up on extending flange 111, and the setting of extension flange 111 can prolong the length of the pore wall of mounting hole, increases the area of contact between the pore wall of handle portion 211 and mounting hole, so be favorable to improving the installation stability between the two.

The inner peripheral wall of the valve body 11 is provided with a recessed portion 10a at a position facing the mounting hole, and a projection 112 is provided on the outer peripheral wall of the valve body 11 at a position corresponding to the recessed portion 10 a. The protruding portion 212 can protrude into the recessed portion 10a, and the end portion of the protruding portion 212 abuts against the surface of the recessed portion 10a facing the mounting hole, and can prevent water from flowing out from the gap between the end portion of the protruding portion 212 and the inner peripheral wall of the valve body 11 without flowing through the scale inhibitor 213. In this embodiment, the diameter of the extending portion 212 may be the same as the inner diameter of the valve body 11, so that the outer circumferential surface of the extending portion 212 may abut against the inner circumferential surface of the valve body 11, and then all water flows may flow into the extending portion 212 first, and flow out from the extending portion 212 after contacting with the scale inhibitor 213, which not only ensures that the scale inhibitor 213 and the water flows are fully mixed, but also ensures that all water flows can carry small particles of the scale inhibitor 213, and enhances the scale inhibition effect of the scale inhibitor 213 on the water flows.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A water inlet valve assembly for mounting at a water inlet of a water heater, the water inlet valve assembly comprising:

2. The intake valve assembly as claimed in claim 1, wherein the housing comprises a handle portion and an extending portion, the handle portion and the extending portion are both disposed in a cylindrical shape, one end of the handle portion is closed, the other end of the handle portion is disposed in an open shape, one end of the extending portion is open, the other end of the extending portion is provided with a shielding member, the open end of the handle portion is sleeved with the open end of the extending portion, the handle portion is at least partially exposed outside the valve body and detachably connected with the valve body, the extending portion extends into the valve body, and the peripheral wall of the extending portion is provided with the water passing hole.

3. The intake valve assembly of claim 2, wherein the handle portion has an external thread on an outer peripheral surface thereof, and the mounting hole has an internal thread on a wall thereof for screwing with the external thread.

4. The fill valve assembly of claim 2, wherein the outer peripheral surface of the handle portion is provided with a stop projection that abuts the outer peripheral surface of the valve body.

5. The fill valve assembly of claim 2, wherein the handle portion is provided with a sealing ring that sealingly abuts an aperture wall of the mounting aperture.

6. The inlet valve assembly as claimed in any one of claims 2 to 5, wherein the handle portion is provided with a stopper ring rib on an outer peripheral surface thereof, and the inlet portion is provided with a stopper ring groove on an inner peripheral surface thereof for engagement with the stopper ring rib.

7. The intake valve assembly as claimed in claim 6, wherein the protruding portion has an anti-rotation rib on an outer circumferential surface thereof, and the valve body has an anti-rotation groove on an inner wall thereof, the anti-rotation rib being adapted to the anti-rotation groove.

8. The intake valve assembly as claimed in claim 6, wherein the inlet portion comprises two annular ribs spaced apart from each other and a plurality of strip ribs connecting the two annular ribs, and the space between the adjacent strip ribs forms the water passing hole.

9. The intake valve assembly as claimed in claim 2, wherein a filter screen is further provided within the inlet portion, the filter screen being disposed to cover the inner bore of the valve body.

10. The intake valve assembly as claimed in claim 9, wherein a limiting rib is provided in the inlet portion, the limiting rib extends along an axis of the inlet portion and is provided near an inner peripheral surface of the inlet portion, the filter net extends along a peripheral wall of the inlet portion, and the filter net is located between the limiting rib and the inner surface of the inlet portion.

11. The water inlet valve assembly as recited in claim 1 wherein the scale inhibiting means further comprises a magnetic bar disposed within the housing.

12. A water heater comprising a liner and a water inlet valve assembly as claimed in any one of claims 1 to 11, wherein the liner is provided with a water inlet, and the water inlet valve assembly is mounted at the water inlet.