water softener

Abstract

The utility model relates to drinking water equipment technical field, concretely provides a water softener, and aims at solving the problem that the height of the resin tank of the existing water softener is limited by the size of the box of the water softener. For this purpose, the water softener of the utility model includes a box, a resin tank and a water inlet and outlet assembly, the top wall of the box is provided with a convex part extending towards the outside of the box, the resin tank is installed in the box along the vertical direction and is located below the convex part, the first opening is arranged on the convex part, the water inlet and outlet assembly communicates with the resin tank through the first opening, the convex part is arranged on the top wall of the box, and the resin tank is installed below the convex part, so that the water softener can install the resin tank with higher size, the capacity of the resin tank is increased, and the soft water capacity of the water softener is improved.

Description

Technical Field

[0001] This utility model relates to the field of water softening equipment technology, and specifically provides a water softener. Background Technology

[0002] A water softener is a household device that uses specific technology to reduce the hardness of water. Its core function is to remove calcium and magnesium ions from the water, prevent scale formation, and improve the quality of water use.

[0003] Existing water softeners contain a resin tank, which uses resin to adsorb calcium and magnesium ions from the water. However, due to the size limitations of the tank, the height of the existing resin tank is generally low, resulting in a small capacity and reduced water softening ability. This necessitates frequent regeneration of the resin tank to restore its adsorption capacity, thus affecting the user experience.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the height of the resin tank of the existing water softener is limited by the size of the water softener body.

[0006] In a first aspect, the present invention provides a water softener, including a housing, a resin tank, and an inlet / outlet water assembly. The top wall of the housing is provided with a protrusion extending outward toward the outside of the housing. The resin tank is installed vertically inside the housing and located below the protrusion. The protrusion is provided with a first opening, and the inlet / outlet water assembly communicates with the resin tank through the first opening.

[0007] In the preferred embodiment of the above-mentioned water softener, the housing is provided with a limiting structure at the first opening, and the limiting structure abuts against the resin tank to prevent the resin tank from shaking.

[0008] In the preferred embodiment of the water softener described above, there are multiple limiting structures, and these multiple limiting structures are distributed at circumferential intervals along the first opening.

[0009] In the preferred embodiment of the above-mentioned water softener, the tank body includes a salt tank and a top cover. The top of the salt tank is open, and the top cover is detachably installed on the top of the salt tank. Salt granules are contained in the salt tank. A portion of the resin tank is inserted into the salt tank, and the protrusion is provided on the top cover.

[0010] In the preferred embodiment of the above-mentioned water softener, the top of the outer wall of the salt tank is provided with an annular mounting platform, and the bottom of the side wall of the top cover overlaps the annular mounting platform.

[0011] In the preferred embodiment of the above-mentioned water softener, the side wall of the salt tank is provided with a first snap-fit ​​structure, and the top cover is provided with a second snap-fit ​​structure that is opposite to the first snap-fit ​​structure. When the bottom end of the side wall of the top cover is attached to the annular mounting platform, the first snap-fit ​​structure and the second snap-fit ​​structure engage to detachably and securely connect the salt tank and the top cover.

[0012] In the preferred embodiment of the above-mentioned water softener, the first snap-fit ​​structure is a snap-fit ​​hole provided on the side wall of the salt tank, and the second snap-fit ​​structure is a snap-fit ​​plate extending in a vertical direction. The bottom end of the snap-fit ​​plate is provided with a snap tongue. When the bottom end of the side wall of the upper cover overlaps with the annular mounting platform, the top end of the outer side wall of the salt tank is located between the inner side wall of the upper cover and the snap-fit ​​plate, and the snap tongue is secured in the snap-fit ​​hole; and / or there are multiple first snap-fit ​​structures, which are distributed circumferentially at intervals along the side wall of the salt tank, and multiple second snap-fit ​​structures are arranged opposite to the first snap-fit ​​structures; and / or the side wall of the salt tank is provided with a first positioning structure, and the upper cover is provided with a second positioning structure. When the bottom end of the side wall of the upper cover overlaps with the annular mounting platform, the first positioning structure cooperates with the second positioning structure to align the first snap-fit ​​structure with the second snap-fit ​​structure.

[0013] In the preferred technical solution of the above-mentioned water softener, the first positioning structure is the card hole, which is located below the annular mounting platform and communicates with the annular mounting platform. The second positioning structure is a positioning plate provided at the bottom end of the side wall of the upper cover and extending in the vertical direction. The positioning plate is adapted to the card hole and can be inserted into the card hole from the top of the card hole.

[0014] In the preferred embodiment of the above-mentioned water softener, the water softener further includes a cover body, which is detachably installed on the tank body; and / or the water softener further includes a salt valve, which is installed vertically in the tank body, and the salt valve is connected to the inlet / outlet water assembly to send the brine in the tank body into the resin tank.

[0015] In the preferred embodiment of the above-mentioned water softener, the cover includes a body and a salt filling cover. The body is provided with a salt filling port, and the salt filling cover is detachably installed on the salt filling port. The body is detachably installed on the housing. The top wall of the housing is provided with a second opening opposite to the salt filling port. And / or the bottom of the inner sidewall of the cover is provided with a third snap-fit ​​structure, and the outer sidewall of the housing is provided with a fourth snap-fit ​​structure opposite to the third snap-fit ​​structure. The number of third snap-fit ​​structures is multiple and they are distributed circumferentially along the inner sidewall of the cover. The number of fourth snap-fit ​​structures is multiple and they are opposite to the third snap-fit ​​structures. The third snap-fit ​​structures and the fourth snap-fit ​​structures engage with each other to detachably install the cover on the housing.

[0016] By adopting the above technical solution, this utility model provides a protrusion on the top wall of the housing and installs the resin tank below the protrusion, enabling the water softener to install a higher-sized resin tank, increasing the capacity of the resin tank and improving the water softening capacity of the water softener.

[0017] Furthermore, by setting multiple limiting structures on the first opening, this utility model can limit the shaking of the resin tank and improve the stability of the resin tank.

[0018] Furthermore, by snapping the salt box and the top cover together and setting a positioning structure, this utility model makes it easier to disassemble and assemble the box.

[0019] Furthermore, this invention protects the resin tank and water inlet / outlet components by installing a cover, and makes it easier to add salt by setting a salt-adding cover. Attached Figure Description

[0020] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which: Figure 1 This is a structural schematic diagram of the water softener of this utility model; Figure 2 This is the structural explosion of the water softener of this utility model. Figure 1 ; Figure 3 This is the structural explosion of the water softener of this utility model. Figure 2 ; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 yes Figure 3 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the structure of the top cover of the water softener of this utility model. Figure 1 ; Figure 7This is a schematic diagram of the structure of the top cover of the water softener of this utility model. Figure 2 ; Figure 8 yes Figure 7 A magnified view of point C in the middle.

[0021] List of reference numerals in the attached diagram: 1. Box body; 11. Salt box; 12. Top cover; 13. Protrusion; 111. Circular mounting platform; 112. Locking hole; 121. Locking plate; 122. Locking tongue; 123. Positioning plate; 124. Second opening; 125. Locking groove; 131. First opening; 132. Limiting structure; 2. Resin tank; 3. Inlet and outlet water components; 4. Lid; 41. Body; 42. Salt filling cap; 43. Salt filling port; 44. Strip-shaped protrusion; 5. Salt valve. Detailed Implementation

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] It should be noted that in the description of this utility model, terms such as "inner," "outer," "upper," "lower," "top," and "bottom," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Furthermore, it should be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connect," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Based on the background art, which points out that the height of the resin tank in existing water softeners is limited by the size of the water softener's casing, this utility model provides a water softener that aims to install a taller resin tank by setting a protrusion on the top wall of the casing and installing the resin tank below the protrusion, thereby increasing the capacity of the resin tank and improving the water softening capacity of the water softener.

[0026] Specifically, such as Figures 1 to 3As shown, this utility model provides a water softener, including a housing 1, a resin tank 2, and an inlet / outlet water assembly 3. The top wall of the housing 1 is provided with a protrusion 13 extending outward toward the outside of the housing 1. The resin tank 2 is installed vertically inside the housing 1 and located below the protrusion 13. The protrusion 13 is provided with a first opening 131, and the inlet / outlet water assembly 3 passes through the first opening 131 and communicates with the resin tank 2.

[0027] For example, such as Figures 1 to 3 As shown, the resin tank 2 of this utility model is installed vertically inside the housing 1. The bottom of the housing 1 is provided with an installation position for fixing the resin tank 2. The water inlet and outlet assembly 3 is provided with a raw water inlet pipe and a soft water outlet pipe. The raw water inlet pipe is connected to tap water, and the soft water outlet pipe is connected to water-using equipment (such as a kitchen faucet or water heater). The protrusion 13 is located on the top wall of the housing 1 and protrudes upward. The protrusion 13 is cap-shaped and matches the shape of the mouth of the resin tank 2. The first opening 131 is located on the top of the protrusion 13, and the resin tank 2 is located directly below the first opening 131. By setting the protrusion 13, the water softener can install a higher-sized resin tank 2, increasing the capacity of the resin tank 2 and improving the water softening capacity of the water softener.

[0028] Preferably, such as Figure 6 and Figure 7 As shown, the housing 1 of this utility model is provided with a limiting structure 132 extending in the horizontal direction at the first opening 131. The limiting structure 132 abuts against the resin tank 2 to prevent the resin tank 2 from shaking.

[0029] For example, such as Figure 6 and Figure 7 As shown, the limiting structure 132 of this utility model is arranged in the horizontal direction. When the water flow in the inlet / outlet component 3 or the resin tank 2 fluctuates and causes the resin tank 2 to shake, the limiting structure 132 can block the movement of the opening of the resin tank 2, thus ensuring the stability of the resin tank 2.

[0030] It should be noted that this utility model does not limit the form of the limiting structure 132. For example, those skilled in the art can set the limiting structure 132 as a limiting plate or a limiting post, etc. Such adjustments and changes to the specific form of the limiting structure 132 do not deviate from the principle and scope of this utility model and should be limited to the protection scope of this utility model.

[0031] It should also be noted that the present invention does not limit the number of limiting structures 132. For example, those skilled in the art can set the limiting structures 132 to two or more distributed circumferentially along the first opening 131. Such adjustments and changes to the specific number of limiting structures 132 do not deviate from the principle and scope of the present invention and should be limited to the protection scope of the present invention.

[0032] Preferably, such as Figure 6 and Figure 7 As shown, the present invention has multiple limiting structures 132, which are distributed at intervals along the circumference of the first opening 131.

[0033] For example, such as Figure 6 and Figure 7 As shown, the limiting structure 132 of this utility model is a limiting plate, and there are 8 limiting plates distributed at intervals along the circumference of the first opening 131.

[0034] Preferably, such as Figure 2 and Figure 3 As shown, the box 1 of this utility model includes a salt box 11 and a top cover 12. The top of the salt box 11 is open, and the top cover 12 is detachably installed on the top of the salt box 11. Salt granules are contained in the salt box 11. A part of the resin tank 2 is inserted into the salt box 11, and a protrusion 13 is provided on the top cover 12.

[0035] For example, such as Figure 2 and Figure 3 As shown, the salt tank 11 of this utility model is used to hold salt granules. After adding water, it forms brine, which is used for the regeneration of resin in resin tank 2. The salt tank 11 is detachably connected to the top cover 12, which makes it convenient to replace and repair resin tank 2.

[0036] It should be noted that this utility model does not limit the connection method between the salt tank 11 and the upper cover 12. For example, those skilled in the art can connect the salt tank 11 and the upper cover 12 by overlapping, snap-fit ​​connection or plug-in connection. Such adjustments and changes to the specific connection method between the salt tank 11 and the upper cover 12 do not deviate from the principle and scope of this utility model and should be limited to the protection scope of this utility model.

[0037] Preferably, such as Figures 2 to 4 As shown, the top of the outer side wall of the salt tank 11 of this utility model is provided with an annular mounting platform 111, and the bottom of the side wall of the upper cover 12 overlaps on the annular mounting platform 111.

[0038] For example, such as Figures 2 to 4 As shown, the annular mounting platform 111 of this utility model is located at the top of the outer side wall of the salt tank 11. That is, the thickness of the side wall at the annular mounting platform 111 is less than the thickness of the side wall of other parts of the salt tank 11. The bottom shape of the side wall of the upper cover 12 matches the top shape of the side wall of the salt tank 11, so that the upper cover 12 can be installed on the top of the salt tank 11. That is, the bottom end of the side wall of the upper cover 12 overlaps on the annular mounting platform 111.

[0039] Preferably, such as Figure 4 and Figure 8As shown, the salt tank 11 of this utility model is provided with a first snap-fit ​​structure on its side wall, and the upper cover 12 is provided with a second snap-fit ​​structure that is opposite to the first snap-fit ​​structure. When the bottom end of the side wall of the upper cover 12 is attached to the annular mounting platform 111, the first snap-fit ​​structure and the second snap-fit ​​structure engage to detachably and fix the salt tank 11 and the upper cover 12.

[0040] For example, such as Figure 4 and Figure 8 As shown, when the top cover 12 of this utility model is installed on the top of the salt tank 11, it can be secured together by the first snap-fit ​​structure and the second snap-fit ​​structure, which improves the firmness of the installation of the top cover 12.

[0041] It should be noted that this utility model does not limit the form of the first snap-fit ​​structure and the second snap-fit ​​structure. For example, those skilled in the art can set the first snap-fit ​​structure and the second snap-fit ​​structure as a matching snap hole and snap plate, or a snap slot and snap post, etc. Such adjustments and changes to the specific form of the first snap-fit ​​structure and the second snap-fit ​​structure do not deviate from the principle and scope of this utility model, and should all be limited to the protection scope of this utility model.

[0042] Preferably, such as Figure 4 and Figure 8 As shown, the first snap-fit ​​structure of this utility model is a snap-fit ​​hole 112 provided on the side wall of the salt tank 11, and the second snap-fit ​​structure is a snap-fit ​​plate 121 extending in the vertical direction. The bottom end of the snap-fit ​​plate 121 is provided with a snap-fit ​​tongue 122. When the bottom end of the side wall of the upper cover 12 is attached to the annular mounting platform 111, the top end of the outer side wall of the salt tank 11 is located between the inner side wall of the upper cover 12 and the snap-fit ​​plate 121, and the snap-fit ​​tongue 122 is fixed in the snap-fit ​​hole 112.

[0043] For example, such as Figure 4 and Figure 8 As shown, the top of the side wall of the salt box 11 of this utility model is provided with a locking hole 112, and the inside of the upper cover 12 is provided with a locking plate 121 extending downward in the vertical direction. The bottom end of the locking plate 121 is provided with a locking tongue 122. When the upper cover 12 is placed on the top of the salt box 11, the top of the outer side wall of the salt box 11 is located between the inner side wall of the upper cover 12 and the locking plate 121, and the locking tongue 122 is locked in the locking hole 112.

[0044] It should be noted that this utility model does not limit the number of the first snap-fit ​​structure and the second snap-fit ​​structure. For example, those skilled in the art can set the first snap-fit ​​structure and the second snap-fit ​​structure into two or more sets that cooperate with each other. Such adjustments and changes to the specific number of the first snap-fit ​​structure and the second snap-fit ​​structure do not deviate from the principle and scope of this utility model and should be limited to the protection scope of this utility model.

[0045] Preferably, such as Figure 2, Figure 3 , Figure 6 and Figure 7 As shown, the present invention has multiple first snap-fit ​​structures, which are distributed circumferentially along the side wall of the salt tank 11. The number of second snap-fit ​​structures is also multiple, which are arranged opposite to the first snap-fit ​​structures.

[0046] For example, such as Figure 2 , Figure 3 , Figure 6 and Figure 7 As shown, the present invention has 8 card holes 112 and 8 card plates 121, which are arranged in a one-to-one correspondence with the card holes 112. The 8 card holes 112 are distributed circumferentially along the side wall of the salt box 11.

[0047] Preferably, such as Figure 4 , Figure 6 and Figure 7 As shown, the salt tank 11 of this utility model is provided with a first positioning structure on its side wall and a second positioning structure on its upper cover 12. When the bottom end of the side wall of the upper cover 12 is attached to the annular mounting platform 111, the first positioning structure and the second positioning structure cooperate to make the first snap-fit ​​structure aligned with the second snap-fit ​​structure.

[0048] In other words, by cooperating with the first positioning structure and the second positioning structure, the first snap-fit ​​structure can be quickly aligned with the second snap-fit ​​structure, thereby improving the installation efficiency of the top cover 12.

[0049] It should be noted that this utility model does not limit the form of the first positioning structure and the second positioning structure. For example, those skilled in the art can set the first positioning structure and the second positioning structure as a matching positioning groove and positioning plate, or a positioning hole and a positioning post, etc. Such adjustments and changes to the specific form of the first positioning structure and the second positioning structure do not deviate from the principle and scope of this utility model and should be limited to the protection scope of this utility model.

[0050] Preferably, such as Figure 4 , Figure 6 and Figure 7 As shown, the first positioning structure of this utility model is a card hole 112, which is located below the annular mounting platform 111 and communicates with the annular mounting platform 111. The second positioning structure is a positioning plate 123 that is set at the bottom of the side wall of the upper cover 12 and extends in the vertical direction. The positioning plate 123 is adapted to the card hole 112 and can be inserted into the card hole 112 from the top of the card hole 112.

[0051] For example, such as Figure 4 , Figure 6 and Figure 7As shown, the card hole 112 of this utility model is located below the annular mounting platform 111, and the top of the card hole 112 is connected to the annular mounting platform 111. The positioning plate 123 is set at the bottom of the side wall of the upper cover 12 in a vertical direction. When the upper cover 12 is installed, the positioning plate 123 is aligned with the card hole 112, so that the card can be accurately locked into the card hole 112.

[0052] Preferably, such as Figures 1 to 3 As shown, the water softener of this utility model also includes a cover 4, which is detachably installed on the housing 1.

[0053] For example, such as Figures 1 to 3 As shown, the cover 4 of this utility model is detachably installed on the upper cover 12 to protect the water inlet / outlet assembly 3 and the resin tank 2.

[0054] Preferably, such as Figure 2 and Figure 3 As shown, the water softener of this utility model also includes a salt valve 5, which is installed vertically inside the housing 1. The salt valve 5 is connected to the inlet / outlet water assembly 3 to send the brine in the housing 1 into the resin tank 2.

[0055] For example, such as Figure 2 and Figure 3 As shown, the bottom of the salt tank 11 of this utility model is provided with a salt valve 5 mounting position for fixing the salt valve 5. The salt valve 5 can transport the brine in the salt tank 11 to the resin tank 2 through the inlet / outlet water assembly 3 to regenerate the resin.

[0056] Preferably, such as Figures 1 to 3 As shown, the cover 4 of this utility model includes a body 41 and a salt-adding cover 42. The body 41 is provided with a salt-adding port 43. The salt-adding cover 42 is detachably installed on the salt-adding port 43. The body 41 is detachably installed on the box body 1. The top wall of the box body 1 is provided with a second opening 124 opposite to the salt-adding port 43.

[0057] For example, such as Figures 1 to 3 As shown, the second opening 124 of this utility model is provided on the upper cover 12 and located above the salt valve 5. The salt filling port 43 is located above the second opening 124. The salt filling cover 42 is detachably installed on the salt filling port 43. When salt needs to be added, the salt filling cover 42 can be removed to add salt to the salt tank 11.

[0058] It should be noted that this utility model does not limit the connection method between the box body 1 and the cover body 4. For example, those skilled in the art can connect the box body 1 and the cover body 4 by overlapping, snap-fit ​​connection or plug-in connection. Such adjustments and changes to the specific connection method between the box body 1 and the cover body 4 do not deviate from the principle and scope of this utility model and should be limited to the protection scope of this utility model.

[0059] Preferably, such as Figures 5 to 7 As shown, the bottom of the inner wall of the cover 4 of this utility model is provided with a third snap-fit ​​structure, and the outer wall of the box 1 is provided with a fourth snap-fit ​​structure that is opposite to the third snap-fit ​​structure. There are multiple third snap-fit ​​structures that are distributed circumferentially along the inner wall of the cover 4. There are multiple fourth snap-fit ​​structures that are opposite to the third snap-fit ​​structures. The third snap-fit ​​structure and the fourth snap-fit ​​structure are snap-fitted together to detachably install the cover 4 onto the box 1.

[0060] For example, such as Figures 5 to 7 As shown, the third snap-fit ​​structure of this utility model is a strip-shaped protrusion 44 provided at the bottom of the inner sidewall of the cover 4, and the fourth snap-fit ​​structure is a slot 125 provided on the outer sidewall of the upper cover 12. There are 12 strip-shaped protrusions 44 and they are distributed circumferentially along the inner sidewall of the cover 4. There are 12 slots 125 that are arranged opposite to the strip-shaped protrusions 44. The strip-shaped protrusions 44 are snapped into the slots 125.

[0061] It should be noted that this utility model does not limit the form and quantity of the third and fourth snap-fit ​​structures. For example, those skilled in the art can also set the third and fourth snap-fit ​​structures as matching snap holes and snap plates, or snap slots and snap posts, etc., and can also set the third and fourth snap-fit ​​structures as nine or ten sets, etc. Such adjustments and changes to the specific form and quantity of the third and fourth snap-fit ​​structures do not deviate from the principle and scope of this utility model, and should all be limited to the protection scope of this utility model.

[0062] The working process of a water softener is as follows: tap water enters resin tank 2 through the raw water inlet pipe. The resin in resin tank 2 adsorbs calcium and magnesium ions in the water, thereby achieving the effect of softening the water quality. The softened water then flows into the softened water outlet pipe through the central pipe in resin tank 2, thus outputting softened water.

[0063] When the calcium and magnesium ions in the resin become saturated, the resin’s adsorption capacity decreases sharply, and the resin needs to be regenerated. The salt valve 5 transports the brine in the salt tank 11 to the resin tank 2 through the inlet and outlet water assembly 3. The brine then replaces the calcium and magnesium ions in the resin, and the wastewater is discharged through the drain outlet on the inlet and outlet water assembly 3, thereby restoring the resin’s adsorption capacity.

[0064] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0065] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A water softener, characterized in that, The device includes a housing (1), a resin tank (2), and a water inlet / outlet assembly (3). The top wall of the housing (1) has a protrusion (13) extending outward toward the outside of the housing (1). The resin tank (2) is installed vertically inside the housing (1) and located below the protrusion (13). The protrusion (13) has a first opening (131). The water inlet / outlet assembly (3) passes through the first opening (131) and communicates with the resin tank (2).

2. The water softener according to claim 1, characterized in that, The housing (1) has a limiting structure (132) at the first opening (131), and the limiting structure (132) abuts against the resin tank (2) to prevent the resin tank (2) from shaking.

3. The water softener according to claim 2, characterized in that, The number of the limiting structures (132) is multiple, and the multiple limiting structures (132) are distributed circumferentially along the first opening (131).

4. The water softener according to claim 1, characterized in that, The box (1) includes a salt box (11) and a top cover (12). The top of the salt box (11) is open. The top cover (12) is detachably installed on the top of the salt box (11). Salt granules are contained in the salt box (11). A portion of the resin tank (2) is inserted into the salt box (11). The protrusion (13) is provided on the top cover (12).

5. The water softener according to claim 4, characterized in that, The top of the outer wall of the salt tank (11) is provided with an annular mounting platform (111), and the bottom of the side wall of the upper cover (12) overlaps the annular mounting platform (111).

6. The water softener according to claim 5, characterized in that, The salt tank (11) has a first snap-fit ​​structure on its side wall, and the top cover (12) has a second snap-fit ​​structure that is opposite to the first snap-fit ​​structure. When the bottom end of the side wall of the top cover (12) is attached to the annular mounting platform (111), the first snap-fit ​​structure and the second snap-fit ​​structure engage to detachably and securely connect the salt tank (11) and the top cover (12).

7. The water softener according to claim 6, characterized in that, The first snap-fit ​​structure is a snap-fit ​​hole (112) provided on the side wall of the salt tank (11), and the second snap-fit ​​structure is a snap-fit ​​plate (121) extending in the vertical direction. The bottom end of the snap-fit ​​plate (121) is provided with a snap-fit ​​tongue (122). When the bottom end of the side wall of the upper cover (12) is attached to the annular mounting platform (111), the top end of the outer side wall of the salt tank (11) is located between the inner side wall of the upper cover (12) and the snap-fit ​​plate (121), and the snap-fit ​​tongue (122) is secured in the snap-fit ​​hole (112); and / or The number of the first snap-fit ​​structures is multiple, and the multiple first snap-fit ​​structures are distributed circumferentially along the side wall of the salt tank (11). The number of the second snap-fit ​​structures is multiple, which are arranged opposite to the first snap-fit ​​structures; and / or The salt tank (11) has a first positioning structure on its side wall and a second positioning structure on its top cover (12). When the bottom end of the side wall of the top cover (12) is attached to the annular mounting platform (111), the first positioning structure and the second positioning structure cooperate to align the first snap-fit ​​structure with the second snap-fit ​​structure.

8. The water softener according to claim 7, characterized in that, The first positioning structure is the card hole (112), which is located below the annular mounting platform (111) and communicates with it. The second positioning structure is a positioning plate (123) located at the bottom of the side wall of the upper cover (12) and extending vertically. The positioning plate (123) is adapted to the card hole (112) and can be inserted into the card hole (112) from the top of the card hole (112).

9. The water softener according to any one of claims 1 to 8, characterized in that, The water softener also includes a cover (4), which is detachably mounted on the housing (1); and / or The water softener also includes a salt valve (5), which is installed vertically inside the housing (1). The salt valve (5) is connected to the inlet / outlet water assembly (3) to send the brine in the housing (1) into the resin tank (2).

10. The water softener according to claim 9, characterized in that, The cover (4) includes a body (41) and a salt filling cap (42). The body (41) is provided with a salt filling port (43). The salt filling cap (42) is detachably installed on the salt filling port (43). The body (41) is detachably installed on the box (1). The top wall of the box (1) is provided with a second opening (124) opposite to the salt filling port (43); and / or The bottom of the inner wall of the cover (4) is provided with a third snap-fit ​​structure, and the outer wall of the box (1) is provided with a fourth snap-fit ​​structure that is opposite to the third snap-fit ​​structure. There are multiple third snap-fit ​​structures that are distributed circumferentially along the inner wall of the cover (4). There are multiple fourth snap-fit ​​structures that are opposite to the third snap-fit ​​structures. The third snap-fit ​​structure and the fourth snap-fit ​​structure are snap-fitted together to detachably install the cover (4) onto the box (1).

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