Water softening device of dish washing machine

Abstract

The water softening device comprises a shell, a salt box and a resin bin which are arranged in parallel are arranged in the shell, the salt box is divided into a salt storage bin and a water storage bin which are arranged in parallel, a water suction pump is arranged outside the salt box, and the water suction pump is connected with a salt water suction pipe leading to the bottom of the salt storage bin and a salt water discharging pipe connected with the water storage bin. A control valve is arranged at the upper end of the resin bin and provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected with an external waterway, the water outlet pipe is connected with the interior of the dish washing machine, the control valve is provided with a first water injection pipe and a second water injection pipe, the first water injection pipe is connected with the water storage bin, and the second water injection pipe is connected with the resin bin. A drainage pipe is connected to one side of the resin bin. The dish-washing machine can soften water, and the cleaning effect of the dish-washing machine is improved. During backwashing, saturated saline water is diluted and then introduced into the resin bin, so that the concentration of the saline water can be controlled, the salt consumption is reduced, and the economical efficiency and practicability of the water softening device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, and more particularly to a water softening device for a dishwasher. Background Art

[0002] The domestic water used in our daily life can be divided into soft water and hard water. Soft water, such as distilled water, is also called sweet water. It has hydrogen and oxygen as its main components. Soft water is purer and feels soft because of its low hardness. Hard water, such as groundwater, has metal ions such as calcium ions and magnesium ions in addition to its main components. Hard water feels hard because of its hardness. The washing water in the dishwasher is generally hard water, which contains a large amount of metal ions. Long-term use of unsoftened washing water to wash tableware is prone to scale accumulation in the spray arm, inner tank and other parts of the dishwasher, causing the spray hole of the dishwasher to be blocked, affecting the washing effect, etc.

[0003] Therefore, some dishwashers equipped with water softeners have appeared in the prior art. Such dishwashers soften hard water before washing dishes, and then use the softened water to rinse the dishes, thereby inhibiting scale from accumulating in the spray arm, inner tank and other parts of the dishwasher.

[0004] The main filter material of current water softening devices is softening resin. During the softening water treatment process, calcium, magnesium ions, etc. in tap water will be adsorbed by ion exchange resin, thereby reducing the hardness of the water. When the softening resin reaches the critical workload, it cannot be softened and needs to be regenerated. Most of the existing regeneration methods are to prepare saturated brine by adding sodium chloride to the salt box, and use the brine to rinse the ion exchange resin to restore its working capacity. The use of saturated brine has a high brine concentration and a large salt consumption, which can easily cause a large burden on the environment. Improper cleaning will cause the softening function to fail, resulting in scale inside the dishwasher, affecting the service life of the dishwasher. In addition, the different water quality in different regions leads to different working cycles of water softeners, but most users do not understand the water hardness in their area and cannot correctly set the cleaning frequency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a water softening device for a dishwasher, which can realize the cleaning of the water softening device, has a simple structure, and is economical and practical.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a water softening device for a dishwasher, comprising a shell, wherein a salt box and a resin bin are arranged in parallel in the shell, the salt box is divided into a salt storage bin and a water storage bin in parallel, a water suction pump is arranged outside the salt box, the water suction pump is connected to a salt water suction pipe leading to the bottom of the salt storage bin and a salt water discharge pipe connected to the water storage bin, a control valve is arranged at the upper end of the resin bin, the control valve is provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is connected to an external water circuit, the water outlet pipe is connected to the inside of the dishwasher, the control valve is provided with a water injection pipe 1 and a water injection pipe 2, the water injection pipe 1 is connected to the water storage bin, the water injection pipe 2 is connected to the resin bin, a backwash pipe is also arranged between the water storage bin and the control valve, and a drain pipe is connected to one side of the upper part of the resin bin.

[0007] The water softener is installed at the rear of the dishwasher, and the water inlet pipe is connected to the external water source. Under normal conditions, water flows into the resin compartment after entering the control valve from the water inlet pipe and the water injection pipe, and completes the exchange of calcium and magnesium ions after being treated by the exchange resin, that is, the water quality is softened. The softened water is sent to the inside of the dishwasher through the control valve and the water outlet pipe.

[0008] The salt bin is divided into two parallel cavities, namely the salt storage bin and the water storage bin. The bottom of the salt storage bin always maintains a certain water level, so that there is part of saturated brine at the bottom. When backwashing is required, the water suction pump sucks the saturated brine at the bottom and sends it into the water storage bin. At the same time, water enters the water storage bin through the water injection pipe 2 to complete the dilution of the brine, and then is sent to the resin bin through the backwash pipe to clean the exchange resin.

[0009] Furthermore, a water quality detection device is provided at the water inlet pipe. By adding a water quality detection device to the dishwasher water inlet pipe, the water quality of the current inlet water is detected in real time and the detected data is transmitted back to the main control board. The frequency and concentration of soft water backwashing can be adjusted according to the returned data.

[0010] Furthermore, a central tube is provided in the resin bin, and an upper water distributor and a lower water distributor are provided at the upper and lower ends of the central tube, respectively, and the resin bin is filled with exchange resin. Clean water enters the resin bin from the control valve and the water injection pipe 2, and is softened after being exchanged with the resin, and then flows upward from the bottom through the lower water distributor and the central tube, and enters the dishwasher through the control valve and the outlet pipe. During backwashing, the salt water enters the central tube through the backwash pipe and the control valve, and after reaching the bottom, it backwashes the exchange resin upward and is discharged through the upper drain pipe.

[0011] Furthermore, the volume of the exchange resin accounts for 85%-90% of the volume of the resin bin. When the brine is backwashed, the exchange resin will expand during the filling and regeneration process, and expansion space is reserved inside the resin storage bin.

[0012] Furthermore, a one-way valve is provided on the backwash pipe to limit the water flow from the water storage bin to the control valve. The diluted brine can only flow through the control valve to the glue storage bin for cleaning, thus preventing the brine from flowing in the opposite direction.

[0013] Furthermore, a water injection pipe three is provided between the salt storage bin and the water inlet pipe, and the water inlet of the salt storage bin is connected to the water inlet pipe and connected to an external water source, thereby ensuring that only one external water pipe is provided for the same water softening device.

[0014] Furthermore, a flow meter is installed on the water injection pipe three to control the water inflow into the salt storage tank. The amount of saturated brine can be set according to the water quality conditions in different regions, so that the concentration of the diluted brine is controlled by the water inflow into the water storage tank.

[0015] Furthermore, a brine concentration monitoring device is provided on the backwash pipe to monitor the delivery concentration of the backwash brine in real time. When it does not match the set concentration, it indicates that the salt storage is insufficient and salt needs to be added.

[0016] In summary, the utility model can soften water and improve the cleaning effect of the dishwasher. During backwashing, the saturated brine is first diluted and then introduced into the resin chamber, which can control the concentration of the brine, reduce the amount of salt used, and improve the economy and practicality of the water softener. Adding a water quality detection function at the water inlet can effectively avoid the problem of scale generation inside the dishwasher due to the inability to correctly adjust the soft water function due to different water quality conditions in different regions, thereby increasing the service life of the dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the water softening process of the embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the backwashing process of the water softening device according to an embodiment of the utility model.

[0020] Label instructions: 1. Salt storage tank; 2. Water storage tank; 3. Check valve; 4. Backwash pipe; 5. Lower water distributor; 6. Exchange resin; 7. Center pipe; 8. Resin tank; 9. Upper water distributor; 10. Drain pipe; 11. Outlet pipe; 12. Control valve; 13. Water injection pipe 2; 14. Water quality detection device; 15. Water suction pump; 16. Water injection pipe 3; 17. Water inlet pipe. DETAILED DESCRIPTION

[0021] Reference Figures 1 to 3 The specific implementation of the water softening device of the dishwasher of the utility model is further described.

[0022] A water softening device for a dishwasher comprises a housing, wherein a salt box and a resin tank 8 are arranged in parallel in the housing. Figure 1 As shown, the salt box is divided into a parallel salt storage bin 1 and a water storage bin 2, a water suction pump 15 is arranged outside the salt box, the water suction pump 15 is connected with a salt water suction pipe leading to the bottom of the salt storage bin 1 and a salt water discharge pipe connected to the water storage bin 2, a control valve 12 is arranged at the upper end of the resin bin 8, the control valve 12 is provided with a water inlet pipe 17 and a water outlet pipe 11, the water inlet pipe 17 is connected to an external water circuit, the water outlet pipe 11 is connected to the inside of the dishwasher, the control valve 12 is provided with a water injection pipe 1 (omitted in the figure, not shown) and a water injection pipe 2 13, the water injection pipe 1 is connected to the water storage bin 2, the water injection pipe 2 13 is connected to the resin bin 8, a backwash pipe 4 is also arranged between the water storage bin 2 and the control valve 12, and a drain pipe 10 is connected to one side of the upper part of the resin bin 8.

[0023] The water softener is installed at the rear side of the dishwasher, and the water inlet pipe 17 is connected to the external water source. Under normal conditions, water enters the control valve 12 from the water inlet pipe 17 and the water injection pipe, flows to the resin bin 8, and completes the exchange of calcium and magnesium ions after being treated by the exchange resin 6, that is, the softening of the water quality. The softened water is sent to the inside of the dishwasher through the control valve 12 and the water outlet pipe 11.

[0024] The salt bin is divided into two parallel cavities, namely the salt storage bin 1 and the water storage bin 2. The bottom of the salt storage bin 1 always maintains a certain water level, so that there is part of saturated brine at the bottom. When backwashing is required, the water suction pump 15 sucks the saturated brine at the bottom and sends it into the water storage bin 2. At the same time, water enters the water storage bin 2 through the water injection pipe 13 to complete the dilution of the brine, and then is sent to the resin bin 8 through the backwash pipe 4 to clean the exchange resin 6.

[0025] In this embodiment, preferably, a water quality detection device 14 is provided at the water inlet pipe 17. The water quality detection device 14 is added to the dishwasher water inlet pipe 17 to detect the water quality of the current incoming water in real time and transmit the detected data back to the main control board. The frequency and concentration of soft water backwashing can be adjusted according to the sent back data.

[0026] In this embodiment, the resin bin 8 is preferably provided with a central tube 7, and the upper and lower ends of the central tube 7 are respectively provided with an upper water distributor 9 and a lower water distributor 5, and the resin bin 8 is filled with exchange resin 6. Clean water enters the resin bin 8 from the control valve 12 and the water injection pipe 13, and softens after passing through the exchange resin 6, and then flows up from the bottom through the lower water distributor 5 and the central tube 7, and enters the dishwasher through the control valve 12 and the outlet pipe 11. During backwashing, the salt water enters the central tube 7 through the backwash pipe 4 and the control valve 12, and after reaching the bottom, it backwashes the exchange resin 6 upward and is discharged through the upper drain pipe 10.

[0027] Preferably, in this embodiment, the volume of the exchange resin 6 accounts for 85%-90% of the volume of the resin bin 8. When the brine is backwashed, the exchange resin 6 will expand during the filling and regeneration process, and expansion space is reserved inside the resin storage bin.

[0028] In this embodiment, a one-way valve 3 is preferably provided on the backwash pipe 4 to limit the water flow from the water storage tank 2 to the control valve 12. The diluted brine can only flow through the control valve 12 to the glue storage tank for cleaning, avoiding reverse backflow of brine.

[0029] In this embodiment, preferably, a water injection pipe 16 is provided between the salt storage bin 1 and the water inlet pipe 17, and the water inlet of the salt storage bin 1 is connected to the water inlet pipe 17 and connected to an external water source, ensuring that only one external water pipe is provided for the same water softening device.

[0030] In this embodiment, preferably, a flow meter is installed on the water injection pipe 3 16 to control the water inflow into the salt storage tank 1, and the amount of saturated brine can be set according to the water quality conditions in different regions, so that the water inflow into the water storage tank controls the concentration of the diluted brine.

[0031] In this embodiment, preferably, a brine concentration monitoring device is provided on the backwash pipe 4 to monitor the delivery concentration of the backwash brine in real time. When it does not match the set concentration, it indicates that the salt storage is insufficient and salt needs to be added.

[0032] like Figure 2 As shown, when the softening device is in normal working state, water enters the control valve 12 from the water inlet pipe 17 and the water injection pipe, flows to the resin bin 8, and completes the exchange of calcium and magnesium ions after being treated by the exchange resin 6, that is, the water quality is softened. The softened water enters the control valve 12 and the water outlet pipe 11 through the lower water distributor 5 and the central pipe 7 and is sent to the inside of the dishwasher.

[0033] like Figure 3 As shown, when the exchange resin 6 needs to be backwashed, the water suction pump 15 sucks the saturated salt water at the bottom and sends it to the water storage tank, and at the same time, water enters the water storage tank 2 through the water injection pipe 13 to complete the dilution of the salt water, and then is sent to the resin tank 8 through the backwash pipe 4 to clean the exchange resin 6. The diluted salt water in the salt storage tank 1 is distributed to the resin tank 8 through the one-way valve 3, and the water is introduced into the bottom of the resin tank 8 through the central pipe 7 to seep out, and flows through the exchange resin 6 from bottom to top to complete the reverse exchange of calcium and magnesium ions, which is the so-called resin backwashing, and then discharged through the drain pipe 10.

[0034] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A water softening device for a dishwasher, characterized in that: It comprises a shell, wherein a salt box and a resin bin are arranged in parallel inside the shell, wherein the salt box is divided into a salt storage bin and a water storage bin in parallel, wherein a water suction pump is arranged outside the salt box, wherein the water suction pump is connected with a salt water suction pipe leading to the bottom of the salt storage bin and a salt water discharge pipe connected with the water storage bin, wherein a control valve is arranged at the upper end of the resin bin, wherein the control valve is provided with a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is connected with an external water circuit, and the water outlet pipe is connected with the inside of the dishwasher, wherein the control valve is provided with a water injection pipe 1 and a water injection pipe 2, wherein the water injection pipe 1 is connected with the water storage bin, and the water injection pipe 2 is connected with the resin bin, wherein a backwash pipe is arranged between the water storage bin and the control valve, and a drain pipe is connected with one side of the upper part of the resin bin.

2. The water softening device for a dishwasher according to claim 1, characterized in that: A water quality detection device is arranged at the water inlet pipe.

3. The water softening device for a dishwasher according to claim 1, characterized in that: A central tube is arranged in the resin bin, an upper water distributor and a lower water distributor are arranged at the upper and lower ends of the central tube respectively, and the resin bin is filled with exchange resin.

4. The water softening device for a dishwasher according to claim 3, characterized in that: The volume of the exchange resin accounts for 85%-90% of the volume of the resin chamber.

5. The water softening device for a dishwasher according to claim 1, characterized in that: A one-way valve is arranged on the backwash pipe to limit the water flow from the water storage tank to the control valve in one direction.

6. The water softening device for a dishwasher according to claim 1, characterized in that: A water injection pipe three is arranged between the salt storage bin and the water inlet pipe.

7. The water softening device for a dishwasher according to claim 6, characterized in that: A flow meter is installed on the water injection pipe three.

8. The water softening device for a dishwasher according to claim 1, characterized in that: The backwash pipe is provided with a salt water concentration monitoring device.

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