CN217808952U - Salt case structure and water softener - Google Patents

Abstract

The utility model belongs to the technical field of water making equipment, a salt case structure and water softener is disclosed. The salt box structure comprises a machine shell, a salt box and a partition plate. The casing is used for containing water; the salt tank is arranged in the machine shell, a backflow port is formed in the upper end of the salt tank, a liquid outlet is formed in the bottom of the salt tank, a first one-way valve is arranged at the liquid outlet, and liquid in the salt tank can be discharged into the machine shell through the first one-way valve; the baffle set up in the salt case, and with the bottom surface interval of salt case sets up, trompil on the baffle, the baffle is used for the bearing salt. Because the density of the salt solution is larger than that of water, the salt solution in the salt box sinks to the bottom of the salt box and enters the machine shell through the liquid outlet. Through constantly to salt incasement moisturizing, can produce more salt solution, the liquid level rises the back in the casing, and unnecessary solution can be through the backward flow mouth reentrant salt incasement, realizes that the circulation of salt dissolves, need not extra power drive, simple structure, and is with low costs.

Description

Salt case structure and water softener

Technical Field

The utility model relates to a system wetting system technical field especially relates to a salt case structure and water softener.

Background

At present, domestic water softeners utilize resins to soften water. The resin needs to be regenerated by periodically absorbing salt solution. The existing water softener generally directly uses a machine shell as a salt box to prepare salt solution, salt blocks and water are directly placed in the machine shell, and the fluidity of liquid in the machine shell is poor, so that the dissolution speed of the salt blocks is low, and the dissolution is insufficient; and the concentration distribution of the salt solution is uneven, and the unsaturated salt solution can be absorbed under the working state of the water softener for absorbing and regenerating the salt, so that the resin can not be fully softened, the soft water efficiency is low, the frequency of absorbing and regenerating the salt is increased, and the energy consumption is increased.

Therefore, a salt tank structure and a water softener are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a salt case structure can solve in the current salt case liquid mobility poor lead to salt piece solution rate low, dissolve insufficient and the uneven problem of salt solution concentration distribution.

To achieve the purpose, the utility model adopts the following technical proposal:

a salt box structure comprising:

a case for containing water;

the salt tank is arranged in the shell, a backflow port is formed in the upper end of the salt tank, a liquid outlet is formed in the bottom of the salt tank, a first one-way valve is arranged at the liquid outlet, and the first one-way valve enables liquid in the salt tank to be discharged into the shell;

the baffle, set up in the salt case, and with the bottom surface interval of salt case sets up, trompil on the baffle, the baffle is used for the bearing salt.

As an alternative to the above-described salt tank structure, the partition plate is lower than the return port.

As an alternative to the above-mentioned salt tank structure, the return port is provided with a second one-way valve, which enables the solution in the cabinet to flow into the salt tank.

As an alternative of the above salt tank structure, the liquid outlet is connected with a liquid discharge pipe, the liquid discharge pipe extends to the bottom end of the casing, and the first check valve is arranged on the liquid discharge pipe.

As an alternative to the above-described salt tank structure, a salt valve is provided in the housing for drawing up the salt solution in the housing.

As an alternative of the salt box structure, the salt box structure further comprises a control valve and a main pipeline, one end of the main pipeline is connected with the control valve, the other end of the main pipeline is connected with the salt valve, a third one-way valve is arranged in the main pipeline, and the salt solution sucked by the salt valve can pass through the main pipeline through the third one-way valve.

As an alternative of the above salt tank structure, the main pipe is communicated with a branch pipe, the communication position of the branch pipe and the main pipe is located between the third one-way valve and the control valve, and the branch pipe is communicated with the top of the salt tank and used for supplementing water into the salt tank.

As an alternative to the above-mentioned salt tank structure, a water distributor is connected to one end of the branch pipe extending into the salt tank.

As an alternative to the above-described salt box structure, the salt box comprises:

the top end of the box body is provided with an opening, the upper end of the side wall of the box body is provided with the backflow port, and the bottom surface of the box body is provided with the liquid outlet;

the box cover is detachably connected with the box body, and a window is arranged on the box cover.

Another object of the utility model is to provide a water softener can solve the problem that current water softener salt piece solution rate is low, the uneven salt solution concentration distribution leads to inhaling salt regeneration number of times to increase, the energy consumption increases.

To achieve the purpose, the utility model adopts the following technical proposal:

a water softener comprises the salt box structure.

The utility model has the advantages that:

the utility model provides an among the salt box structure, salt incasement water forms salt solution with the contact of salt piece, and because of the density of salt solution is greater than water, the salt solution will sink to salt bottom of the case portion, and then in the liquid outlet entering casing through salt bottom of the case portion. Through constantly to salt incasement moisturizing, can produce more saline solution, the saline solution gets into in the casing back liquid level rise for unnecessary solution can enter into the salt incasement again through the backward flow mouth in the casing, realizes that the circulation of salt dissolves, need not extra power drive, simple structure, it is with low costs.

The utility model provides an among the water softener, soft water resin's regeneration degree is high, can reduce the number of times of inhaling salt regeneration, reduces the energy consumption.

Drawings

FIG. 1 is a schematic structural diagram of a salt tank structure during salt absorption and regeneration according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a salt tank structure according to an embodiment of the present invention during water replenishing;

fig. 3 is a schematic structural diagram of a salt box structure provided by the second embodiment of the present invention;

fig. 4 is a schematic structural view of a case cover according to a second embodiment of the present invention;

fig. 5 is a cross-sectional view of a salt box structure provided in the second embodiment of the present invention;

fig. 6 is a schematic structural diagram of a partition board provided in the second embodiment of the present invention;

fig. 7 is a cross-sectional view of a partition board according to a second embodiment of the present invention;

fig. 8 is a schematic structural view of a water distributor provided in the second embodiment of the present invention;

fig. 9 is a front view of the water distributor provided by the second embodiment of the present invention.

In the figure:

1. a housing; 2. a salt box; 21. a box body; 211. a liquid outlet; 212. a return port; 22. a box cover; 221. a window; 23. a liquid discharge pipe; 24. a return pipe; 3. a partition plate; 31. a top plate; 32. a side plate; 41. a first check valve; 42. a second one-way valve; 43. a third check valve; 44. a fourth check valve; 5. a salt valve; 6. a main pipeline; 7. a control valve; 8. a branch pipe; 9. a water distributor; 91. an outer cylinder; 92. an inner barrel; 93. an installation part; 931. a first card slot; 932. and a second card slot.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Example one

This example provides a water softener for preparing soft water. The water softener includes a resin tank and a salt tank structure. The resin tank is filled with soft water resin, water passes through the resin tank, and the soft water resin adsorbs calcium and magnesium ions in the water to prepare soft water. The salt box structure is used for preparing regenerated salt solution. When the calcium and magnesium ions adsorbed by the soft water resin in the resin tank are saturated, a regeneration salt solution is provided for the resin tank, and the calcium and magnesium ions adsorbed by the soft water resin are taken away by the regeneration salt solution, so that the soft water resin is regenerated, and the soft water is continuously prepared.

The existing water softener generally has low salt dissolving efficiency and insufficient dissolved salt, so that the concentration distribution of the salt solution is uneven, the regeneration degree of the soft water resin is influenced, the salt absorption regeneration frequency is increased, and the energy consumption is increased.

For solving above-mentioned problem, this embodiment improves the salt case structure to can realize that the circulation of salt is dissolved, increase the mobility of liquid, improve the saturation of salt solution and salt solution dissolution efficiency.

As shown in fig. 1 and 2, the salt box structure includes a cabinet 1, a salt box 2, and a partition 3. The casing 1 is used for flourishing water, and salt case 2 sets up in casing 1, and the upper end of salt case 2 is provided with backward flow mouth 212, and the bottom of salt case 2 is provided with liquid outlet 211. Baffle 3 sets up in salt case 2 to set up with the bottom surface interval of salt case 2, trompil on the baffle 3, baffle 3 is used for the bearing salt. In this salt case structure, salt case 2 internal water forms salt solution with the contact of salt piece, and because of the density of salt solution is greater than water, the salt solution will sink to salt case 2 bottoms, and then gets into in the casing 1 through the liquid outlet 211 of salt case 2 bottoms. Through constantly to salt case 2 interior moisturizing, can produce more salt solution, the salt solution gets into casing 1 interior back casing 1 interior liquid level rise for unnecessary solution can be through in the backward flow mouth 212 reentrant salt case 2 in the casing 1, realizes that the circulation of salt dissolves.

In this embodiment, through set up liquid outlet 211 and backward flow mouth 212 in salt case 2, can utilize the density of salt solution to be greater than the characteristics of water, make the salt solution at casing 1 and 2 internal loop of salt case flow, increase solution mobility to improve salt dissolution efficiency, make the concentration of salt solution that the salt case structure provided more even, be favorable to improving soft water resin's regeneration degree, reduce the frequency of inhaling salt regeneration in the water softener.

Here, the bottom surface of the salt tank 2 is spaced from the bottom surface of the cabinet 1 to provide a certain height difference for the solution to flow out from the liquid outlet 211 of the salt tank 2, so that the solution discharged from the salt tank 2 can flow toward the bottom of the cabinet 1.

Alternatively, the casing 1 may be a casing of the water softener, or may be a casing structure separately provided inside or outside the water softener casing.

Here, when the water softener needs to absorb and regenerate salt, water needs to be added into the salt tank 2 first. I.e., before refilling, the liquid level in the cabinet 1 is lower than that of the return port 212. After water is added into the salt box 2, part of salt is dissolved by water to form salt solution, and the salt solution enters the machine shell 1 through the liquid outlet 211. As the total flow of make-up water into the salt tank 2 increases, the liquid level in the enclosure 1 rises. When the solution in the cabinet 1 flows back into the salt tank 2 through the return port 212, the water supply to the salt tank 2 can be stopped. The salt box structure can realize circulating salt dissolving at the moment.

In order to ensure that the solution flowing back into the salt tank 2 can be contacted with the salt block again so as to continuously dissolve the salt, the height of the partition plate 3 is lower than that of the return port 212, so that the solution entering the salt tank 2 from the return port 212 can fall onto the salt block on the partition plate 3 so as to ensure that the solution is fully contacted with the salt, the salt dissolving efficiency is improved, and the salt block can be fully dissolved so as to obtain a saturated salt solution.

In order to prevent the solution in the casing 1 from flowing back into the salt tank 2 through the liquid outlet 211, a first check valve 41 is disposed at the liquid outlet 211, and the first check valve 41 can discharge the salt solution in the salt tank 2 into the casing 1. Through setting up first check valve 41, can restrict the flow direction of liquid outlet 211 department, make salt solution in the salt case 2 can only get into in the casing 1 through liquid outlet 211, and can't be by in casing 1 backward flow to salt case 2 to the flow direction of liquid is stable in the assurance salt case structure, thereby realizes the circulation and dissolves salt.

Further, the liquid outlet 211 is connected with a liquid discharge pipe 23, and the first check valve 41 is disposed on the liquid discharge pipe 23, so as to prevent the solution in the housing 1 from entering the salt tank 2 through the liquid outlet 211 by controlling the flowing direction of the liquid in the liquid discharge pipe 23.

In order to increase the mobility of liquid in the salt box structure, liquid outlet 211 sets up the bottom surface at salt box 2 to guarantee that the salt solution in salt box 2 can get into casing 1 as far as possible, improve the even degree of salt solution concentration.

Optionally, the drain pipe 23 extends to the bottom of the casing 1, and guides the saline solution in the salt tank 2 to the bottom of the casing 1, so as to ensure that the solution in the casing 1 can sufficiently participate in the circulation flow, and the concentration of the saline solution is more uniform.

In order to prevent the liquid in the salt tank 2 from entering the machine shell 1 through the return port 212, the second check valve 42 is arranged at the return port 212, and the solution in the machine shell 1 can flow into the salt tank 2 through the second check valve 42, so that the diversion of the solution is avoided.

Specifically, the return port 212 is connected to the return pipe 24, and the second check valve 42 is provided on the return pipe 24.

Further, a salt valve 5 is arranged in the machine shell 1, and the salt valve 5 is used for sucking the salt solution in the machine shell 1. The salt solution in the casing 1 is sucked through the salt valve 5 to supply the salt solution to the resin tank, thereby realizing the regeneration of the soft water resin. In this embodiment, the salt valve 5 includes a salt suction pipe extending to the bottom of the cabinet 1, the bottom of the salt suction pipe is provided with a plurality of salt suction holes, and the salt solution at the bottom of the cabinet 1 enters the salt suction pipe through the salt suction holes so as to be supplied to the soft water resin.

Optionally, the salt absorption hole is a strip hole with a smaller width, and the strip hole extends along the circumferential direction of the salt absorption pipe. Through reducing the width of inhaling the salt hole, can avoid direct suction undissolved salt granule, avoid salt granule to pile up and influence smoking efficiency at salt absorption pipe or inhale salt hole department.

In this embodiment, the salt suction hole of the salt valve 5 is located at the bottom of the casing 1. When the solution in the salt box structure flows circularly, the solution entering the salt box 2 from the return port 212 continuously washes the salt blocks, so that the dissolution of the salt blocks can be accelerated. The salt solution continuously sinks to the bottom of the machine shell 1, and water or solution with relatively low density flows back to the salt box 2 to continuously participate in the dissolution of the salt blocks. In this case, the saline solution at the bottom of the cabinet 1 tends to be saturated, so that the saline solution absorbed by the saline valve 5 has a high salt concentration, which is advantageous to improve the regeneration degree of the soft water resin.

Optionally, the salt tank structure further comprises a control valve 7 and a main conduit 6. The main pipeline 6 one end is connected with control valve 7, and the other end is connected with salt valve 5, is provided with third check valve 43 in the main pipeline 6, and third check valve 43 enables salt solution that salt valve 5 absorbs to pass through main pipeline 6. The control valve 7 can be in communication with the resin tank so that the liquid in the salt valve 5 can be controlled to pass through the control valve 7 to be discharged from the salt tank structure for supply to the resin tank. By arranging the third one-way valve 43, on one hand, the salt solution in the control valve 7 or the main pipeline 6 can be prevented from flowing back in the salt absorption regeneration mode; on the other hand, when water is supplemented into the salt box 2, the water in the control valve 7 can be prevented from flowing into the salt valve 5.

Further, as shown in fig. 2, the main pipe 6 is communicated with a branch pipe 8, the communication position of the branch pipe 8 and the main pipe 6 is located between the third one-way valve 43 and the control valve 7, and the branch pipe 8 is communicated with the top of the salt tank 2 for supplementing water into the salt tank 2. In this embodiment, the control valve 7 is connected to an external water source, and the external water source can be selectively communicated with the branch pipeline 8 by switching the flow path to replenish water into the salt tank 2; it is also possible to choose to place the resin tank in communication with the main conduit 6 in order to supply the resin tank with regenerated salt solution.

Optionally, a fourth check valve 44 is disposed on the branch pipe 8, and the fourth check valve 44 enables the water passing through the control valve 7 to enter the salt tank 2 through the branch pipe 8, so as to prevent the solution in the salt tank 2 from flowing back. By arranging the fourth check valve 44, on one hand, the water in the salt tank 2 can be prevented from flowing reversely in the water replenishing process of the salt tank 2; on the other hand, the solution backflow in the salt box 2 caused by the negative pressure effect at the main pipeline 6 in the salt absorption regeneration mode can be avoided.

In this embodiment, one end of the branch pipe 8 extending into the salt tank 2 is connected with a water distributor 9. The water distributor 9 can disperse the water flow in the branch pipe 8 to more sufficiently contact with the salt cake to dissolve the salt. Optionally, both the bottom and the circumferential side of the water distributor 9 are able to discharge water, so that the water entering the salt tank 2 is more dispersed.

Example two

The embodiment provides a water softener which is further improved on the basis of the first embodiment. As shown in fig. 3 and 4, the salt box 2 includes a box body 21 and a box cover 22 for facilitating the replenishment of salt lumps into the salt box 2. The top end of the box body 21 is open, the upper end of the side wall of the box body 21 is provided with a return port 212, and the bottom surface of the box body 21 is provided with a liquid outlet 211; the cover 22 is detachably connected to the case 21. When the structure in the salt box 2 needs to be maintained, the opening at the top end of the box body 21 can be opened by disassembling the box cover 22, so that the operation is convenient.

Further, in order to observe the consumption of the salt blocks in the salt box 2 conveniently, a window 221 is provided on the box cover 22. The user can observe the consumption condition of the salt blocks through the window 221 without disassembling the box cover 22, which is more convenient.

Optionally, by arranging the window 221, a user can conveniently and directly put the salt blocks into the salt blocks through the window 221, the box cover 22 does not need to be detached, and the operation is more convenient.

To further simplify the structure within the salt tank 2, as shown in fig. 5-7, the partition plate 3 includes a top plate 31 and side plates 32 circumferentially disposed around the top plate 31, and bottom ends of the side plates 32 abut against the bottom surface of the salt tank 2 to support the partition plate 3. Realize the fixed of baffle 3 in salt case 2 through curb plate 32 and 2 butts of salt case, need not additionally set up fixed partition plate 3's structure in the salt case 2, be favorable to reduce cost, also need not punch fasteners such as mounting screw, improved salt case 2's sealing performance and structural strength.

Optionally, side plates 32 are connected to four circumferential sides of the top plate 31 to improve the stability of the partition plate 3 in the salt tank 2.

In this embodiment, be provided with on the roof 31 and cross the water district, cross and be provided with a plurality of water holes of crossing in the water district to salt solution after making the dissolved salt can enter into salt case 2 bottoms through crossing the water hole. In order to avoid the solution that gets into in the salt case 2 by backward flow mouth 212 directly to get into the salt case 2 bottom through crossing the water hole, in this embodiment, cross and reserve between one side lateral wall that is provided with backward flow mouth 212 on water district and the salt case 2 and have preset interval, draw the distance between water district and the backward flow mouth 212 of crossing greatly to improve the probability that the solution that flows back to in the salt case 2 by backward flow mouth 212 erodees the salt piece, so that the salt piece can fully dissolve, and then improve the concentration of salt solution.

Further, the liquid outlet 211 is disposed at a side of the bottom surface of the salt tank 2 close to the salt valve 5, so that the salt solution discharged from the liquid outlet 211 is closer to the salt valve 5, and the salt solution with higher concentration is easier to be absorbed by the salt valve 5 for regeneration of the soft water resin.

In order to improve the contact effect between water and the salt blocks when water is supplemented to the salt tank 2, as shown in fig. 8 and 9, the water distributor 9 comprises an outer cylinder 91 and an inner cylinder 92, the inner cylinder 92 is arranged in the outer cylinder 91, the bottom end of the inner cylinder 92 is connected with the bottom end of the outer cylinder 91, a central water outlet hole is formed in the inner cylinder 92, and a plurality of lateral water outlet holes are axially formed in the outer cylinder 91. When water in the branch pipeline 8 passes through the water distributor 9, water can be discharged through the central water outlet hole and the plurality of lateral water outlet holes, so that water can more fully wash the salt blocks on the partition plate 3, and the salt dissolving efficiency is improved.

In order to facilitate the installation of the water distributor 9 and the branch pipes 8, as shown in fig. 9, the top of the outer cylinder 91 is further provided with an installation part 93, and the installation part 93 can extend into the branch pipes 8. The inner wall of the branch pipeline 8 is provided with a clamping block. Set up first draw-in groove 931 and second draw-in groove 932 on the circumference outer wall of installation department 93, first draw-in groove 931 runs through the top end face of installation department 93, and second draw-in groove 932 communicates with first draw-in groove 931, and extends along the circumference of installation department 93, and second draw-in groove 932 does not run through the top end face of installation department 93. When the water distributor 9 and the branch pipe 8 are installed, the fixture block is first aligned with the opening of the first engaging groove 931 penetrating the top cross section of the installation part 93, and then the water distributor 9 is inserted into the branch pipe 8 so that the fixture block enters the first engaging groove 931. The water distributor 9 is rotated to make the fixture block enter the second fixture groove 932 from the first fixture groove 931, and the installation is completed. After the branch pipe 8 and the water distributor 9 are installed, the top surfaces of the clamping blocks are abutted to the top surface of the second clamping groove 932, so that the water distributor 9 and the branch pipe 8 can be fixed along the axial direction, and the water distributor 9 and the branch pipe 8 are prevented from falling off. In this embodiment, the water distributor 9 and the branch pipes 8 are easy to assemble and disassemble.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements, and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A salt box structure, comprising:

a housing (1) for containing water;

the salt tank (2) is arranged in the machine shell (1), a backflow port (212) is formed in the upper end of the salt tank (2), a liquid outlet (211) is formed in the bottom of the salt tank (2), a first one-way valve (41) is arranged at the position of the liquid outlet (211), and liquid in the salt tank (2) can be discharged into the machine shell (1) through the first one-way valve (41);

the baffle (3), set up in salt case (2), and with the bottom surface interval of salt case (2) sets up, trompil on baffle (3), baffle (3) are used for the bearing salt.

2. Salt tank structure according to claim 1, characterized in that the partition (3) is lower than the return opening (212).

3. The salt tank structure according to claim 1, characterized in that a second one-way valve (42) is arranged at the return port (212), the second one-way valve (42) enabling the solution in the cabinet (1) to flow into the salt tank (2).

4. The salt tank structure according to claim 1, characterized in that a drain pipe (23) is connected to the liquid outlet (211), the drain pipe (23) extends to the bottom end of the housing (1), and the first one-way valve (41) is arranged on the drain pipe (23).

5. Salt tank structure according to any of claims 1-4, characterized in that a salt valve (5) is arranged in the enclosure (1), which salt valve (5) is used for sucking up salt solution in the enclosure (1).

6. The salt tank structure according to claim 5, characterized in that the salt tank structure further comprises a control valve (7) and a main pipe (6), one end of the main pipe (6) is connected with the control valve (7), the other end is connected with the salt valve (5), a third one-way valve (43) is arranged in the main pipe (6), and the third one-way valve (43) enables the salt solution sucked by the salt valve (5) to pass through the main pipe (6).

7. The salt tank structure of claim 6, characterized in that the main pipe (6) is communicated with a branch pipe (8), the communication position of the branch pipe (8) and the main pipe (6) is between the third one-way valve (43) and the control valve (7), and the branch pipe (8) is communicated with the top of the salt tank (2) for supplementing water into the salt tank (2).

8. Salt tank structure in accordance with claim 7, characterized in that a water distributor (9) is connected to the end of the branch pipe (8) that extends into the salt tank (2).

9. The salt tank structure according to any of claims 1-4, characterized in that the salt tank (2) comprises:

the top end of the box body (21) is opened, the upper end of the side wall of the box body (21) is provided with the return opening (212), and the bottom surface of the box body (21) is provided with the liquid outlet (211);

the box cover (22) is detachably connected with the box body (21), and a window (221) is formed in the box cover (22).

10. A water softener comprising a salt tank structure as claimed in any one of claims 1-9.

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