Water softener

Abstract

The utility model relates to the technical field of water purification equipment, particularly provides a water softener, and aims to solve the problem that salt particles are easily accumulated on a component in a salt adding opening when the conventional water softener is used for adding salt. In order to achieve the purpose, the water softener provided by the utility model comprises the following components: a housing which is internally provided with a cavity structure and can accommodate salt particles, and the top of the housing is provided with a salt adding port for adding the salt particles into the housing; the salt valve is vertically installed in the shell and located below the salt adding opening; the resin tank is arranged in the shell; the salt level detection device is installed on the shell and located in the salt adding opening; the first flow guide structure is arranged at the top of the salt valve; the second flow guide structure is arranged above the salt level detection device and is fixedly connected with the shell or is integrally arranged with the shell; the first flow guide structure and the second flow guide structure can guide salt particles downwards so as to prevent accumulation of the salt particles. Through the arrangement, the use efficiency of salt particles and the cleanliness of the water softener are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, and particularly provides a water softener. Background Art

[0002] The hardness of water is directly proportional to the content of calcium and magnesium ions. Since the content of calcium and magnesium ions in the groundwater of some areas is relatively high, the water quality is relatively hard. The high hardness of water will not only affect the taste, easily produce scale, but also interact with detergents such as soap to produce calcium and magnesium soaps insoluble in water, affecting the washing effect.

[0003] In daily life, in order to reduce the hardness of water quality, water softeners have gradually been developed and applied. Currently, the mainstream water softening equipment all applies ion exchange technology. The functional ions on the resin exchange with calcium and magnesium ions in the water, thereby adsorbing the excess calcium and magnesium ions in the water, achieving the purpose of removing scale (calcium carbonate or magnesium carbonate) and reducing the hardness of water quality, and can be regenerated after the resin is saturated with adsorption, that is, by adding water softening salt (sodium salt water with a high salt concentration) to wash away the calcium and magnesium ions adsorbed on the resin, restoring the exchange capacity of the resin, and realizing the reuse of the resin.

[0004] However, when adding salt to the existing water softener, salt particles are likely to accumulate on other components (such as salt valves, salt level detection devices, etc.) located inside the salt addition port.

[0005] Therefore, a new technical solution is needed in this field to solve the above problems. Summary of the Utility Model

[0006] The utility model aims to solve the above technical problems, that is, to solve the problem that when adding salt to the existing water softener, salt particles are likely to accumulate on other components located inside the salt addition port.

[0007] The utility model provides a water softener, which includes: a housing, an inner cavity structure is formed inside the housing, which can accommodate salt particles, and a salt addition port is provided at the top of the housing to add salt particles into the housing; a salt valve, the salt valve is vertically installed inside the housing and is located below the salt addition port; a resin tank, the resin tank is installed inside the housing; a salt level detection device, the salt level detection device is installed on the housing and is located inside the salt addition port; a first diversion structure, the first diversion structure is arranged at the top of the salt valve; a second diversion structure, the second diversion structure is arranged above the salt level detection device and is fixedly connected or integrally provided with the housing; both the first diversion structure and the second diversion structure can guide the salt particles downward to prevent the salt particles from accumulating.

[0008] In the preferred technical solution of the above water softener, the first diversion structure is set as a conical top cover.

[0009] In the preferred technical solution of the above water softener, the second diversion structure is arranged as an inclined top cover.

[0010] In the preferred technical solution of the above water softener, the housing includes a box body and a cover body. The top of the box body has a pick-up and placement opening, the cover body is detachably covered on the pick-up and placement opening, the salt adding port is arranged on the cover body, and the second diversion structure is fixedly connected or integrally arranged with the cover body.

[0011] In the preferred technical solution of the above water softener, the housing further includes a fixing frame. The fixing frame is detachably installed on the top of the box body, the cover body is detachably installed on the fixing frame. The fixing frame has a first opening, a second opening and a mounting hole. The position of the first opening corresponds to the position of the salt adding port, the position of the second opening corresponds to the position of the top opening of the resin tank, the mounting hole is located below the second diversion structure, and the salt level detection device is installed in the mounting hole.

[0012] In the preferred technical solution of the above water softener, the salt level detection device is arranged as an infrared detector.

[0013] In the preferred technical solution of the above water softener, a water blocking structure is further arranged at the bottom of the mounting hole. The water blocking structure is located below the salt level detection device to isolate the salt level detection device from the water flow below.

[0014] In the preferred technical solution of the above water softener, a circular clamping groove is further arranged on the fixing frame. The circular clamping groove is in clamping fit with the top of the resin tank, and the second opening is located in the circular clamping groove.

[0015] In the preferred technical solution of the above water softener, a plurality of reinforcing ribs are further arranged on the fixing frame. The plurality of reinforcing ribs are arranged at intervals along the circumferential direction of the circular clamping groove, and the reinforcing ribs extend along the radial direction of the circular clamping groove.

[0016] In the preferred technical solution of the above water softener, the cover body includes a fixed cover and a movable cover. The fixed cover is detachably covered on the pick-up and placement opening, and the movable cover is detachably covered on the salt adding port.

[0017] In the case of adopting the above technical solution, the water softener of the present utility model includes a housing. A cavity structure is formed inside the housing to accommodate salt grains. A salt adding port is provided at the top of the housing to add salt grains into the housing. A salt valve is vertically installed inside the housing and is located below the salt adding port. A resin tank is installed inside the housing. A salt level detection device is installed on the housing and is located inside the salt adding port. A first diversion structure is provided at the top of the salt valve. A second diversion structure is provided above the salt level detection device and is fixedly connected or integrally formed with the housing. Both the first diversion structure and the second diversion structure can guide the salt grains downward to prevent the salt grains from accumulating. Through such a setting, on the one hand, installing the salt level detection device inside the salt adding port helps to avoid the interference of the resin tank and the side wall of the housing, increasing the detection range and detection accuracy. On the other hand, the first diversion structure and the second diversion structure can guide the salt grains downward during the salt adding process, guiding all the scattered salt grains into the cavity structure below, preventing the salt grains from falling on the top of the salt valve and the salt level detection device and accumulating, improving the utilization rate of the salt grains, and at the same time improving the cleanliness of the water softener and the matching accuracy between components.

[0018] Further, the first diversion structure of the present utility model is set as a conical top cover. Through such a setting, on the one hand, the salt grains falling on the top of the salt valve can slide into the cavity structure along the circumferential direction from different directions, ensuring that no salt grains accumulate on the first diversion structure, and at the same time making the falling direction of the salt grains more dispersed and uniform. On the other hand, the structure of the conical top cover is simple, suitable for the installation position of the salt valve, and convenient for the salt grains to slide in different directions.

[0019] Still further, the second diversion structure of the present utility model is set as an inclined top cover. Through such a setting, on the one hand, the salt grains falling on the second diversion structure can slide along the inclined surface into the cavity structure, ensuring that no salt grains accumulate on the first diversion structure. On the other hand, the structure of the inclined top cover is simple and suitable for its installation position, and can guide the salt grains to one side of the salt adding port, improving the guiding efficiency.

[0020] Still further, the housing of the present utility model includes a box body and a cover body. The top of the box body has a taking and placing opening, and the cover body is detachably covered on the taking and placing opening. The salt adding port is provided on the cover body, and the second diversion structure is fixedly connected or integrally formed with the cover body. Through such a setting, the housing is divided into parts, reducing the processing difficulty of the housing and facilitating the assembly and disassembly of the housing and internal components.

[0021] Furthermore, the housing of the present utility model further includes a fixing frame detachably installed on the top of the box body, and a cover body detachably installed on the fixing frame. The fixing frame has a first opening, a second opening and a mounting hole. The position of the first opening corresponds to the position of the salt adding port, the position of the second opening corresponds to the position of the top opening of the resin tank, the mounting hole is located below the second diversion structure, and the salt level detection device is installed in the mounting hole. Through such a setting, on the one hand, it plays a role in connecting and fixing the box body and the cover body, facilitating the separate disassembly of the box body and the cover body, and at the same time improving the overall strength of the water softener; on the other hand, it plays a role in connecting and fixing the internal components, improving the installation stability of the internal components.

[0022] Furthermore, the salt level detection device of the present utility model is set as an infrared detector. Through such a setting, while ensuring the salt level detection range and accuracy, the production cost is controlled.

[0023] Furthermore, a water blocking structure is further provided at the bottom of the mounting hole of the present utility model. The water blocking structure is located below the salt level detection device to isolate the salt level detection device from the water flow below. Through such a setting, it can prevent the bottom water flow from splashing onto the salt level detection device and damaging the equipment.

[0024] Furthermore, a circular card slot is further provided on the fixing frame of the present utility model. The circular card slot is in snap-fit connection with the top of the resin tank, and the second opening is located in the circular card slot. Through such a setting, the resin tank can be snap-fixed, improving the installation stability of the resin tank.

[0025] Furthermore, a plurality of reinforcing ribs are further provided on the fixing frame of the present utility model. The plurality of reinforcing ribs are arranged at intervals along the circumference of the circular card slot, and the reinforcing ribs extend along the radius of the circular card slot. Through such a setting, the overall strength and pressure-bearing capacity of the fixing frame can be improved, especially the fixing strength for the resin tank is improved.

[0026] Furthermore, the cover body of the present utility model includes a fixed cover and a movable cover. The fixed cover is detachably covered on the access port, and the movable cover is detachably covered on the salt adding port. Through such a setting, on the one hand, it can seal the salt adding port to prevent foreign objects from entering; on the other hand, the separate setting of the movable cover and the fixed cover realizes the independent opening and closing of the salt adding port, improving the use flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings, in which:

[0028] Figure 1 is the structural schematic diagram of the water softener of the present utility model Figure 1 ;

[0029] Figure 2 is a schematic diagram of the structure of the water softener of the present utility model Figure 2 ;

[0030] Figure 3 is a schematic diagram of the internal structure of the water softener of the present utility model;

[0031] Figure 4 is a schematic diagram of the structure of the fixed cover of the water softener of the present utility model;

[0032] Figure 5 is a schematic diagram of the structure of the first diversion structure of the water softener of the present utility model;

[0033] Figure 6 is an assembly schematic diagram of the box body and the fixed frame of the water softener of the present utility model.

[0034] List of reference numerals:

[0035] 11. Box body; 12. Cover body; 121. Salt adding port; 122. Fixed cover; 123. Movable cover; 13. Fixed frame; 131. First opening; 132. Second opening; 133. Mounting hole; 134. Water retaining structure; 135. Circular card slot; 136. Reinforcing rib; 2. Salt valve; 3. Resin tank; 4. Salt level detection device; 51. First diversion structure; 52. Second diversion structure. Specific embodiments

[0036] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0037] It should be noted that in the description of the present utility model, the terms "inner", "outer", "upper", "lower", "top", "bottom", etc., indicating directions or position relationships, are based on the directions or position relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "connected", "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] Based on the problem pointed out in the background art that the existing water softeners are prone to salt particles accumulating on the components inside the salt adding port. The present utility model provides a water softener, which is provided with a diversion structure on the components within the range of the salt adding port, so as to guide the salt particles into the cavity structure below during the salt adding process, avoiding the accumulation of salt particles on the components, and improving the utilization efficiency of salt particles and the cleanliness of the water softener.

[0040] Specifically, as Figures 1 to 6 shown, the water softener of the present utility model includes a housing, a cavity structure is formed inside the housing to accommodate salt particles, a salt adding port 121 is provided at the top of the housing to add salt particles into the housing; a salt valve 2, the salt valve 2 is vertically installed inside the housing and is located below the salt adding port 121; a resin tank 3, the resin tank 3 is installed inside the housing; a salt level detection device 4, the salt level detection device 4 is installed on the housing and is located inside the salt adding port 121; a first diversion structure 51, the first diversion structure 51 is provided at the top of the salt valve 2; a second diversion structure 52, the second diversion structure 52 is provided above the salt level detection device 4 and is fixedly connected or integrally formed with the housing; both the first diversion structure 51 and the second diversion structure 52 can guide the salt particles downward to prevent the accumulation of salt particles.

[0041] Exemplarily, the salt valve 2 and the resin tank 3 are both vertically fixed at the bottom of the housing. After tap water enters the water softener, it will flow through the resin tank 3. The resin has sodium ions, which can exchange with calcium and magnesium ions in the water, thereby adsorbing the excess calcium and magnesium ions in the water, achieving the purpose of removing water scale (calcium carbonate or magnesium carbonate) and softening the water quality. Specifically, when the water containing calcium and magnesium ions passes through the resin, these ions come into contact with the resin and are exchanged by the sodium ions on the resin. When the resin is saturated with calcium and magnesium ions, it no longer has the adsorption effect. At this time, the resin needs to be regenerated, that is, the salt water in the housing is sucked into the resin tank 3 through the salt valve 2. The sodium ions in the salt water will exchange with the calcium and magnesium ions on the resin to remove them. Finally, the residual salt water is flushed out of the water softener with clean water to restore the softening ability of the resin.

[0042] Therefore, the regeneration treatment of the resin consumes a large amount of salt water, so it is necessary to regularly supplement salt particles to the water softener. The water softener of the present utility model supplements salt particles into the housing through the salt adding port 121. Since the salt adding port 121 is located above the salt valve 2, during the process of pouring salt particles into the salt adding port 121, some salt particles will inevitably fall onto the top of the salt valve 2 and cause accumulation.

[0043] In addition, the water softener is usually also equipped with a salt level detection device 4 for detecting the height of the salt level. When the salt level is too low, it can prompt the user to replenish salt in a timely manner. In order to ensure the detection range and accuracy and reduce the interference generated by the resin tank 3 and the side wall, the salt level detection device 4 also needs to be set within the vertical projection range of the salt addition port 121. Therefore, salt particles will also accumulate on the relevant components of the salt level detection device 4 when pouring salt particles.

[0044] For the above reasons, the water softener of the present invention is respectively provided with a first diversion structure 51 and a second diversion structure 52 at the top of the salt valve 2 and above the salt level detection device 4, which can guide the spilled salt particles downward to prevent the salt particles from accumulating on the salt valve 2 and the salt level detection device 4.

[0045] It should be noted that in practical applications, those skilled in the art can flexibly set the shapes of the first diversion structure 51 and the second diversion structure 52 according to needs, such as a hemispherical structure, a conical structure or an inclined plane structure, etc. As long as it can guide the salt particles downward to prevent the salt particles from accumulating, such flexible adjustments and changes do not deviate from the principle and scope of the present utility model and should be limited within the protection scope of the present utility model.

[0046] To sum up, in this solution, installing the salt level detection device 4 in the salt addition port 121 helps to avoid the interference of the resin tank 3 and the side wall of the housing, increasing the detection range and accuracy; the first diversion structure 51 and the second diversion structure 52 can guide the salt particles into the lower cavity structure during the salt addition process, preventing the salt particles from falling on the top of the salt valve 2 and the salt level detection device 4 and accumulating, improving the utilization rate of the salt particles, and at the same time avoiding affecting the cleanliness of the water softener and the matching accuracy between components.

[0047] Preferably, as Figure 2 、 Figure 5 and Figure 6 shown, the first diversion structure 51 of the present utility model is set as a conical top cover.

[0048] Specifically, the conical top cover is fixed on the top of the salt valve 2. When the salt particles are sprinkled on the conical top cover, the conical top cover enables the falling salt particles to slide into the cavity structure along the circumferential direction from different directions, ensuring that no salt particles accumulate on the first diversion structure 51, and at the same time making the falling direction of the salt particles more dispersed and uniform; in addition, the structure of the conical top cover is simple, and since the installation position of the salt valve 2 is in the middle of the housing and is not connected to the side wall of the housing, it is more conducive to guiding the salt particles in different directions.

[0049] Preferably, as Figure 2 and Figure 4 shown, the second diversion structure 52 of the present utility model is set as an inclined plane top cover.

[0050] Specifically, two adjacent sides of the second diversion structure 52 are respectively connected to two adjacent edges of the salt addition port 121, and the other two adjacent sides of the second diversion structure 52 extend into the salt addition port 121. Therefore, the inclined surface is arranged to gradually slope downward along the direction towards the salt addition port 121, so that the falling salt grains can slide along the inclined surface into the cavity structure, ensuring that no salt grains accumulate on the first diversion structure 51. In addition, the structure of the inclined surface top cover is simple and suitable for its connection characteristics with the housing, facilitating the guiding of salt grains to one side of the salt addition port 121 and improving the guiding efficiency.

[0051] Preferably, as Figures 1 to 4 shown, the housing of the present utility model includes a box body 11 and a cover body 12. The top of the box body 11 has a pick-and-place opening, and the cover body 12 is detachably covered on the pick-and-place opening. The salt addition port 121 is arranged on the cover body 12, and the second diversion structure 52 is fixedly connected or integrally provided with the cover body 12.

[0052] Exemplarily, both the bottom of the cover body 12 and the top of the box body 11 have snap-fit structures or screw connection structures, enabling the cover body 12 to be detachably connected to the box body 11, facilitating the disassembly and assembly of internal components through the pick-and-place opening. The salt addition port 121 is located on one side of the cover body 12 close to the salt valve 2, and the other side of the cover body 12 is provided as a receiving cavity, which can accommodate water pipes, controllers, display screens, etc. The resin tank 3 is located at the bottom of the receiving cavity, and the salt addition operation during normal use can be completed only through the salt addition port 121.

[0053] The housing is provided in a split manner, reducing the processing difficulty of the housing, improving the flexibility of housing disassembly and assembly, and facilitating the assembly and disassembly of internal components of the housing.

[0054] Preferably, as Figure 3 and Figure 6 shown, the housing of the present utility model further includes a fixing frame 13. The fixing frame 13 is detachably installed on the top of the box body 11, and the cover body 12 is detachably installed on the fixing frame 13. The fixing frame 13 has a first opening 131, a second opening 132, and a mounting hole 133. The position of the first opening 131 corresponds to the position of the salt addition port 121, the position of the second opening 132 corresponds to the position of the top opening of the resin tank 3, the mounting hole 133 is located below the second diversion structure 52, and the salt level detection device 4 is installed in the mounting hole 133.

[0055] Exemplarily, the fixed frame 13 is arranged as a frame structure, whose shape and size are adapted to the pick-and-place opening. A plurality of connection structures, such as snap connection structures and / or screw connection structures, etc., are arranged at intervals on the upper and lower edges of the fixed frame 13, and can be detachably connected and fixed to the lower box body 11 and the upper cover body 12 respectively. The first opening 131, the second opening 132 and the mounting hole 133 are all located within the fixed frame 13. The first opening 131 is used for adding salt, the second opening 132 is used for the connection between the external water pipe and the resin tank 3, and the mounting hole 133 is used for installing the salt level detection device 4.

[0056] The arrangement of the fixed frame 13, on the one hand, has the function of connecting and fixing the box body 11 and the cover body 12, facilitating the separate disassembly of the box body 11 and the cover body 12, and at the same time improving the overall strength of the water softener; on the other hand, it has the function of connecting and fixing the internal components, improving the installation stability of the internal components.

[0057] Preferably, as Figure 6 shown, the salt level detection device 4 of the present utility model is arranged as an infrared detector.

[0058] The infrared detector has mature technology and low cost, controlling the production cost while ensuring the salt level detection range and accuracy.

[0059] It should be noted that in actual applications, those skilled in the art can also flexibly adopt various devices such as laser sensors and pressure sensors.

[0060] Preferably, as Figure 3 shown, a water blocking structure 134 is further arranged at the bottom of the mounting hole 133 of the present utility model. The water blocking structure 134 is located below the salt level detection device 4 to isolate the salt level detection device 4 from the water flow below.

[0061] Exemplarily, the water blocking structure 134 is arranged as a water blocking cover or a water blocking plate, which can wrap and cover the detection terminals of the salt level detection device 4, preventing the water flow at the bottom from splashing onto the detection terminals and damaging the device.

[0062] Preferably, as Figure 6 shown, a circular card slot 135 is further arranged on the fixed frame 13 of the present utility model. The circular card slot 135 is in snap-fit connection with the top of the resin tank 3, and the second opening 132 is located within the circular card slot 135.

[0063] Exemplarily, the circular card slot 135 is arranged as a hemispherical card slot structure bulging upwards, which is adapted to the shape of the top of the resin tank 3, can fit and fix the resin tank 3, improve the installation stability of the resin tank 3, and at the same time make the second opening 132 just dock with the top opening of the resin tank 3.

[0064] In addition, a plurality of strip-shaped holes are circumferentially arranged at the edge of the second opening 132, so that the edge of the second opening 132 has a certain elasticity, and the tightness of the clamping connection between the circular clamping groove 135 and the resin tank 3 can be adjusted.

[0065] Preferably, as Figure 6 shown, a plurality of reinforcing ribs 136 are further arranged on the fixing frame 13 of the present utility model. The plurality of reinforcing ribs 136 are arranged at intervals along the circumference of the circular clamping groove 135, and the reinforcing ribs 136 extend along the radial direction of the circular clamping groove 135.

[0066] Exemplarily, the reinforcing rib 136 is arranged as a strip-shaped bulge, which improves the plane bearing capacity and overall strength of the fixing frame 13 compared with the plane structure, especially improves the fixing strength of the resin tank 3.

[0067] Preferably, as Figures 1 to 4 shown, the cover body 12 of the present utility model includes a fixed cover 122 and a movable cover 123. The fixed cover 122 is detachably covered on the access opening, and the movable cover 123 is detachably covered on the salt adding port 121.

[0068] The movable cover 123 can seal the salt adding port 121 to prevent foreign objects from entering the outside; at the same time, the independent opening and closing of the salt adding port 121 is realized for daily salt adding operation. The fixed cover 122 can be opened when the internal components are disassembled and assembled, improving the use flexibility.

[0069] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present 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 the present utility model.

Claims

1. A water softener, characterized in that: The water softener comprises: A shell, wherein a cavity structure is formed inside the shell to accommodate salt particles, and a salt adding port is provided on the top of the shell to add salt particles into the shell; A salt valve, the salt valve is vertically installed in the housing and is located below the salt adding port; a resin tank, the resin tank being mounted in the housing; A salt level detection device, the salt level detection device is mounted on the housing and located in the salt adding port; a first flow guiding structure, wherein the first flow guiding structure is arranged on the top of the salt valve; a second flow guiding structure, which is arranged above the salt level detection device and is fixedly connected to or integrally arranged with the housing; The first flow guiding structure and the second flow guiding structure can both guide the salt particles downward to prevent the salt particles from accumulating.

2. The water softener according to claim 1, characterized in that: The first flow-guiding structure is configured as a conical top cover.

3. The water softener according to claim 1, characterized in that: The second flow-guiding structure is configured as a sloped top cover.

4. The water softener according to claim 1, characterized in that: The shell comprises a box body and a cover body, the top of the box body is provided with a take-in and put-out opening, the cover body is detachably covered on the take-in and put-out opening, the salt adding opening is arranged on the cover body, and the second flow guide structure is fixedly connected to or integrally arranged with the cover body.

5. The water softener according to claim 4, characterized in that: The shell also includes a fixing frame, which is detachably mounted on the top of the box body, and the cover body is detachably mounted on the fixing frame. The fixing frame has a first opening, a second opening and a mounting hole. The position of the first opening corresponds to the position of the salt adding port, and the position of the second opening corresponds to the position of the top opening of the resin tank. The mounting hole is located below the second flow guide structure, and the salt level detection device is mounted in the mounting hole.

6. The water softener according to claim 1, characterized in that: The salt level detection device is configured as an infrared detector.

7. The water softener according to claim 5, characterized in that: A water retaining structure is also provided at the bottom of the mounting hole, and the water retaining structure is located below the salt level detection device to isolate the salt level detection device from the water flow below.

8. The water softener according to claim 5, characterized in that: The fixing frame is also provided with a circular slot, the circular slot is engaged with the top of the resin tank, and the second opening is located in the circular slot.

9. The water softener according to claim 8, characterized in that: The fixing frame is also provided with a plurality of reinforcing ribs, the plurality of reinforcing ribs are arranged at intervals along the circumference of the circular slot, and the reinforcing ribs extend along the radial direction of the circular slot.

10. A water softener according to any one of claims 4, 5, 7, 8 and 9, characterized in that: The cover body comprises a fixed cover and a movable cover, wherein the fixed cover is detachably covered on the taking-in and putting-out opening, and the movable cover is detachably covered on the salt adding opening.

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