WO2023159522A1 - Water path system of water softener, regeneration control method, and water softener - Google Patents

Abstract

A water path system of a water softener, a regeneration control method, and a water softener. The water path system of the water softener comprises: a salt box (11); a resin tank (12); a salt suction channel (13), a first water inlet channel (14) and a confluence channel (15), a water inlet end of the salt suction channel (13) being communicated with the salt box (11), and a water outlet end of the salt suction channel (13) and a water outlet end of the first water inlet channel (14) converging and being communicated with the resin tank (12) by means of the confluence channel (15); a flow adjusting unit, configured to adjust an output flow of at least one of the salt suction channel (13) and the first water inlet channel (14); a detection unit, provided in the confluence channel (15) and configured to measure the flow and/or concentration of a liquid passing through the confluence channel (15); and a controller, the flow adjusting unit and the detection unit being separately electrically connected to the controller, and the controller being configured to control, according to information fed back by the detection unit, the flow adjusting unit to adjust the flow. A regeneration effect can be adjusted by controlling and adjusting the concentration of a regeneration liquid and a flow rate of the regeneration liquid in real time, and different use requirements are satisfied.

Description

Waterway system of water softener, regeneration control method and water softener technical field

The present application relates to the technical field of water treatment, in particular to a waterway system of a water softener, a regeneration control method and the water softener.

Background technique

Water softeners generally use ion exchange resin technology to remove calcium and magnesium ions in water, thereby reducing the generation of scale and improving the water experience for bathing and washing. After a period of use, the ion exchange resin is saturated with calcium and magnesium ions, so it needs to be regenerated by flushing with concentrated brine to restore its performance.

The traditional water softener is generally equipped with an ejector in the water system. During regeneration, tap water is used as the power, and the saturated brine dissolved in the salt tank is sucked out through the Venturi effect of the ejector. The salt water is mixed with tap water to produce concentrated The brine enters the resin tank for regeneration. Traditional water softeners cannot control and adjust various parameters during regeneration (such as regeneration solution concentration, regeneration solution flow rate, etc.) Different usage requirements.

Contents of the invention

The main purpose of this application is to propose a waterway system for a water softener, which aims to be able to control and adjust the regeneration liquid concentration and flow rate of the regeneration liquid in real time, so that the regeneration effect can be adjusted to meet different usage requirements.

In order to achieve the above purpose, the waterway system of the water softener proposed by this application includes:

salt tank;

Resin tank;

A salt suction channel, a first water inlet channel and a confluence channel, the water inlet end of the salt suction channel communicates with the salt tank, the water outlet end of the salt absorption channel merges with the water outlet end of the first water inlet channel and communicating with the resin tank via the flow channel;

A flow adjustment unit, configured to adjust the output flow of at least one of the salt suction channel and the first water inlet channel;

a detection unit, arranged in the confluence channel, for detecting the flow rate and/or concentration of the liquid passing through the confluence channel; and

The controller, the flow adjustment unit and the detection unit are respectively electrically connected to the controller, and the controller is used to control the flow adjustment unit to perform flow regulation according to the information fed back by the detection unit.

In one of the embodiments, the flow regulating unit includes an adjustable-speed water pump arranged in the salt suction channel.

In one of the embodiments, the salt suction channel is provided with a one-way valve, and the one-way valve is located on the water outlet side of the adjustable-speed water pump, and the one-way valve is used to restrict the liquid from flowing toward the adjustable-speed water pump. reflow.

In one of the embodiments, the flow regulating unit includes a flow valve provided in the salt inhalation channel and/or the first water inlet channel.

In one of the embodiments, the detection unit includes a flow meter and/or a salinity meter.

In one of the embodiments, the flow regulating unit includes an adjustable speed water pump arranged in the salt suction channel and a flow valve arranged in the first water inlet channel; the detection unit includes a flow meter and a salinity meter .

In one of the embodiments, the water system of the water softener further includes a first control valve provided in the first water inlet channel, and the first control valve is used to open or close the first water inlet channel.

In one of the embodiments, the water system of the water softener further includes a water injection channel and a second control valve arranged in the water injection channel, the water injection channel communicates the first water inlet channel with the salt tank, The second control valve is used to open or close the water injection channel.

In one of the embodiments, the water system of the water softener further includes a connecting channel and a third control valve provided in the connecting channel, the connecting channel communicates the confluence channel with the first water inlet channel, The third control valve is used to open or close the connecting channel.

In one of the embodiments, the water system of the water softener further includes a drainage channel and a fourth control valve arranged in the drainage channel, the drainage channel is in communication with the resin tank, and the fourth control valve is used to Open or close the drain channel.

In one of the embodiments, the water system of the water softener has a regeneration mode, and in the regeneration mode, both the first control valve and the fourth control valve are in an open state, and the second control valve and the The third control valves are all in the closed state, and the brine tank, the salt suction channel, the first water inlet channel, the confluence channel, the resin tank and the drainage channel are connected in sequence to form a regeneration waterway.

The present application also proposes a regeneration control method for the waterway system of the water softener as described above, comprising the following steps:

Determine the target concentration of the regeneration solution;

Obtain the current regeneration solution concentration;

Adjust the flow adjustment unit until the current regeneration solution concentration reaches the target concentration.

In one of the embodiments, the method for determining the target concentration of the regeneration solution includes:

Set the target concentration of the regeneration liquid; or, calculate the target concentration of the regeneration liquid according to the preset parameters of the flow regulating unit and the brine concentration in the brine tank.

In one of the embodiments, the flow adjustment unit includes an adjustable-speed water pump located in the salt suction channel and a flow valve located in the first water inlet channel; The steps for target concentration include:

Set the flow rate of the adjustable speed water pump and the flow rate of the flow valve;

The target concentration of the regeneration solution is calculated according to the flow rate of the speed-adjustable water pump, the flow rate of the flow valve and the brine concentration in the brine tank.

In one of the embodiments, the flow regulating unit includes an adjustable speed water pump arranged in the salt suction channel and a flow valve arranged in the first water inlet channel, and the flow regulating unit is adjusted until the current concentration of the regeneration solution reaches the target concentration The steps include:

Adjust the speed of the adjustable speed water pump and/or the flow of the flow valve;

Compare the current regeneration solution concentration with the target concentration;

When the current regeneration solution concentration does not reach the target concentration, continue to adjust the speed of the adjustable speed water pump and/or the flow rate of the flow valve;

When the current concentration of the regeneration liquid reaches the target concentration, the speed of the speed-adjustable water pump and the flow rate of the flow valve are stabilized.

In one of the embodiments, the flow adjustment unit includes an adjustable speed water pump arranged in the salt suction channel and a flow valve arranged in the first water inlet channel; the flow adjustment unit is adjusted until the current concentration of the regeneration solution reaches the target concentration The steps include:

Adjust the flow valve to the preset flow;

Determine the theoretical speed of the speed-adjustable water pump when the regeneration liquid reaches the target concentration;

Adjust the speed of the adjustable speed water pump to the theoretical speed;

Compare the current regeneration solution concentration with the target concentration;

When the current regeneration solution concentration reaches the target concentration, the adjustable speed water pump will keep running at the theoretical speed;

When the current concentration of the regeneration solution does not reach the target concentration, the speed of the adjustable-speed water pump is adjusted until the current concentration of the regeneration solution reaches the target concentration.

In one of the embodiments, the regeneration control method further includes the following steps;

Determine the target flow rate of the regeneration fluid;

Obtain the current regeneration fluid flow rate;

Adjust the flow adjustment unit until the current flow of regeneration fluid reaches the target flow.

In one of the embodiments, after the current concentration of the regeneration solution reaches the target concentration, the following steps are further included:

Judging whether the salt inhalation is completed according to the preset conditions;

When salt suction is complete, stop further salt suction from the salt tank.

In one of the embodiments, the step of judging whether salt inhalation is completed according to preset conditions includes:

When the concentration of the current regeneration solution continues to drop for a period of time and finally reaches zero, it is judged that the salt absorption is completed;

Alternatively, when the total flow rate of the regeneration liquid reaches a preset value within a preset time period, it is judged that the salt absorption is completed.

The present application also proposes a water softener, including the above-mentioned waterway system of the water softener.

The technical solution of the present application detects the flow rate and/or concentration of the liquid passing through the confluence channel through the detection unit, and feeds back the detection result to the controller, and the controller obtains the current regeneration liquid concentration directly or through calculation according to the information fed back by the detection unit, And compare the current regeneration liquid concentration with the built-in regeneration liquid target concentration, control the working state of the flow adjustment unit according to the comparison result, and then control the flow rate of at least one of the first water inlet channel and the salt absorption channel through the flow adjustment unit The output flow is adjusted until the current concentration of the regeneration solution reaches the target concentration of the regeneration solution. In this way, the concentration and flow rate of the regeneration solution can be controlled and adjusted in real time, and the regeneration effect can be adjusted to meet different usage requirements.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative effort.

Fig. 1 is the schematic diagram of the waterway system of the water softener in the prior art;

Fig. 2 is a schematic diagram of the water circuit of the water softener in the regeneration mode in the prior art;

Fig. 3 is the schematic structural view of an embodiment of the waterway system of the water softener of the present application;

Fig. 4 is a waterway schematic diagram of the waterway system of the water softener in Fig. 3 when it is in regeneration mode;

5 is a schematic flow chart of the first embodiment of the regeneration control method of the present application;

FIG. 6 is a schematic flow chart of the second embodiment of the regeneration control method of the present application;

FIG. 7 is a schematic flowchart of a third embodiment of the regeneration control method of the present application;

FIG. 8 is a schematic flowchart of a fourth embodiment of the regeneration control method of the present application;

FIG. 9 is a schematic flowchart of a fifth embodiment of the regeneration control method of the present application;

FIG. 10 is a schematic flowchart of a sixth embodiment of the regeneration control method of the present application;

FIG. 11 is a schematic flowchart of a seventh embodiment of the regeneration control method of the present application.

Explanation of reference numbers:

label	name	label	name
a	water intake	4	grain of salt
b
Shuikou	5	ion exchange resin
c
drain	6	Resin tank water inlet
1	valve head	7	resin tank outlet
2	salt tank	8	Ejector
3	resin tank	19	first control valve
A		water intake	20	water injection channel
B	Shuikou	twenty one	Second control valve
C	drain	twenty two	connection channel
11	salt tank	twenty three	third control valve
12	resin tank	27	drainage channel
121	first port	28	Fourth control valve
122	second port	29	Second water inlet channel
13	salt channel	30	Outlet channel
14	first water inlet channel	31	bypass channel
15	confluence channel	32	grain of salt
16	Adjustable speed water pump	33	ion exchange resin
17	flow valve	34	flow meter
18	One-way valve	35	salinity meter

The realization, functional features and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present application, the directional indication is only used to explain the relationship between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes, and cannot be interpreted as indications or hints Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if "and/or" or "and/or" appears throughout the text, its meaning includes three parallel plans, taking "A and/or B" as an example, including plan A, or plan B, or A and B is a solution that is satisfied at the same time. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present application.

Water softeners generally use ion exchange resin technology to remove calcium and magnesium ions in water. After the ion exchange resin is saturated with calcium and magnesium ions, it is regenerated by salt solution. Taking Na-type ion exchange resin as an example, after the adsorption of calcium and magnesium ions reaches saturation, sodium chloride solution is generally used for regeneration. Among them, the softening and regeneration process specifically involves the following reactions:

Softening: 2R-SO ₃ Na+Ca ²⁺ →(R-SO ₃ ) ₂ Ca+2Na ⁺

Regeneration: (R-SO ₃ ) ₂ Ca+2Na ⁺ → 2R-SO ₃ Na+Ca ²⁺

Please refer to FIG. 1 , which shows a schematic diagram of a waterway system of a water softener in the prior art. Existing water softeners generally include a valve head 1, a salt tank 2 and a resin tank 3. Salt grains 4 (such as sodium chloride particles) are housed in the salt tank 2, ion exchange resin 5 is housed in the resin tank 3, and the valve head 1 and resin The tank 3 is connected, and the water inlet a, the water outlet b, the drain c and the salt tank 2 are all connected to the resin tank 3 via the valve head 1 . Among them, the valve head 1 constitutes the core component of the water system of the water softener. The water flow direction is switched and the water circuit is turned on and off through the valve head 1, so that the water softener can realize normal operation, water injection + salt dissolution, salt absorption (regeneration), backwashing, Recoil, forward and other functions.

Existing water softeners generally include normal operation mode, water injection+salt dissolution mode, salt absorption (regeneration) mode, backwash mode, backwash mode and positive flush mode. In order to facilitate understanding, the water flow direction of the existing water softener under the above-mentioned several modes will be briefly described below.

In normal operation mode, the tap water flows from the water inlet a to the resin tank water inlet 6, and then enters the resin tank 3. The ion exchange resin 5 in the resin tank 3 absorbs calcium and magnesium ions in the tap water to obtain softened water, and the softened water passes through the resin tank. The tank water outlet 7 flows to the user water outlet b.

In the water injection + salt-dissolving mode, tap water flows from the water inlet a to the salt tank 2, and the salt particles 4 in the salt tank 2 contact the water and form saturated brine or concentrated brine after long-term immersion.

In the salt suction (regeneration) mode, after the water injection + dissolved salt is completed, the valve head 1 switches through the water circuit, uses tap water as the power, and sucks out the saturated brine dissolved in the salt tank 2 through the Venturi effect of the ejector 8, and mixes it with tap water Afterwards, it is diluted into concentrated brine and enters the resin tank 3, and the concentrated brine contacts with the ion exchange resin 5 in the resin tank 3 for regeneration.

In backwash mode, when the brine in the brine tank 2 is sucked out, only tap water enters the resin tank 3 to wash away the remaining brine.

In recoil mode, the tap water flows through the water inlet a to the resin tank outlet 7, then enters the resin tank 3, and then flows from the resin tank water inlet 6 to the drain c. Wherein, the recoil mode can include recoil before regeneration and recoil after regeneration, and the recoil before regeneration is used to loosen the ion exchange resin 5 compressed during normal operation, so as to improve the contact efficiency of brine and ion exchange resin 5 during regeneration , Backwashing after regeneration can flush out the residual brine. The difference between it and backwashing lies in the amount of water, and the flow rate required for backwashing is larger.

In positive flushing mode, the tap water flows through the water inlet a to the resin tank water inlet 6, then enters the resin tank 3, and then flows from the resin tank water outlet 7 to the drain c, and is generally rinsed after regeneration to wash away the regenerated residual brine.

Please refer to FIG. 2 , which shows a schematic water circuit diagram of a water softener in the prior art in a salt absorption (regeneration) mode. During regeneration, tap water is used as power, and the saturated brine dissolved in the salt tank 2 is sucked out through the Venturi effect of the ejector 8, and the brine is mixed with tap water to generate concentrated brine and enter the resin tank 3 for regeneration. Traditional water softeners cannot control and adjust various parameters during regeneration (such as regeneration solution concentration, regeneration solution flow rate, etc.) Different usage requirements. In order to solve the above problems, the present application proposes a new waterway system for a water softener.

Please refer to Fig. 3, this application proposes a waterway system of a water softener, the waterway system of the water softener includes a salt tank 11, a resin tank 12, a salt suction channel 13, a first water inlet channel 14, a confluence channel 15, and a flow adjustment unit , a detection unit and a controller (not shown). The water inlet end of the salt suction channel 13 communicates with the salt tank 11, the water outlet end of the salt suction channel 13 merges with the water outlet end of the first water inlet channel 14 and connects with the The resin tank 12 is connected; the flow adjustment unit is used to adjust the flow of at least one of the salt absorption channel 13 and the first water inlet channel 14; the detection unit is arranged in the confluence channel 15, so The detection unit is used to detect the flow and/or concentration of the liquid passing through the confluence channel 15; the flow adjustment unit and the detection unit are respectively electrically connected to the controller, and the controller is used to The information fed back by the detection unit controls the flow adjustment unit to adjust the flow.

Specifically, the salt box 11 is filled with salt particles 32 (such as sodium chloride), and the resin tank 12 is filled with ion exchange resin 33 . The salt particles 32 in the salt tank 11 can be dissolved in advance through procedures such as water injection and salt dissolution to form saturated brine or concentrated brine. As shown in Figure 4, in the regeneration mode, the brine in the brine tank 11 can be drawn out by using a traditional ejector structure or a water pump on the salt suction channel 13, and the brine is transported towards the confluence channel 15 through the salt suction channel 13, and At the same time, the tap water is delivered to the confluence channel 15 through the water inlet A through the first water inlet channel 14, and the tap water and brine are mixed in the confluence channel 15 to form a regeneration liquid, which is transported to the resin tank 12 through the confluence channel 15, and the regeneration liquid and the resin The ion exchange resin 33 in the tank 12 is contacted to regenerate the ion exchange resin 33 to restore its performance. The controller may include an MCU main control module and an output adjustment module electrically connected to the MCU main control module, the detection unit is electrically connected to the MCU main control module, and the flow adjustment unit is electrically connected to the output adjustment module. It should be noted that the electrical connection herein may be connected in a wireless or wired manner, as long as signal transmission is possible.

When the tap water output from the first water inlet channel 14 is mixed with the brine output from the salt suction channel 13 to form regeneration liquid and passes through the confluence channel 15 , the flow rate and/or concentration of the regeneration liquid can be detected by the detection unit on the confluence channel 15 . Furthermore, the controller controls the working state of the flow regulation unit according to the information fed back by the detection unit, so as to adjust the concentration of the regeneration solution to a target value. Wherein, the regeneration solution concentration=(brine concentration of the brine tank 11*the output flow of the salt absorption channel 13)/(the output flow of the first water inlet channel 14+the output flow of the salt absorption channel 13). Since the brine concentration in the brine tank 11 remains constant (generally saturated brine concentration), in order to make the concentration of the regeneration liquid adjustable, it is necessary to make at least one of the output flow of the salt suction channel 13 and the output flow of the first water inlet channel 14 can be adjusted. In order to realize the adjustment of the regeneration liquid concentration, the flow rate of at least one of the salt absorption channel 13 and the first water inlet channel 14 is adjusted by setting a flow rate regulating unit. For example, the flow regulating unit is used to adjust the flow of the salt-absorbing channel 13. At this time, the liquid flow output from the first water inlet channel 14 remains constant, and the liquid flow output from the salt-absorbing channel 13 can be adjusted; or the flow regulating unit is used to adjust the first The flow rate of the water inlet channel 14, at this time, the liquid flow output by the salt suction channel 13 remains constant, and the liquid flow output by the first water inlet channel 14 can be adjusted; The flow rate of the salt channel 13 is adjusted, and at this time, the liquid flow output from the salt suction channel 13 and the liquid flow output from the first water inlet channel 14 can both be adjusted.

The detection unit is used to detect the flow and/or concentration of the liquid passing through the confluence channel 15 , and the detection unit may include a flow meter 34 and/or a salinity meter 35 . The controller can have a built-in target concentration of the regeneration fluid that is suitable for the usage scenario through a preset program. For example, the detection unit may include a salinity meter 35 disposed in the confluence channel 15 . The salinity of the regeneration solution is detected by the salinity meter 35, and the detected current concentration of the regeneration solution is fed back to the controller; the controller compares the current concentration of the regeneration solution with the built-in target concentration of the regeneration solution; if the target concentration is not reached , the controller controls the flow adjustment unit to adjust the output flow of at least one of the first water inlet channel 14 and/or the salt absorption channel 13. During the adjustment process, the detection unit detects the regeneration liquid concentration in real time and feeds it back to the controller for comparison. Yes, until the current concentration of the regeneration solution reaches the target concentration, the controller controls the flow regulating unit to stop the adjustment, and at this time the concentration of the regeneration solution delivered to the resin tank 12 by the confluence channel 15 remains stable. For another example, the detection unit can also include a flow meter 34 arranged in the confluence channel 15, through which the flow meter 34 can detect the sum of the output flow of the first water inlet channel 14 and the output flow of the salt suction channel 13, and when the first inlet When the water channel 14 is closed, the output flow of the salt suction channel 13 can also be detected by the flow meter 34 . Due to the regeneration solution concentration=(the output flow of brine concentration of brine tank 11*salt suction channel 13)/(the output flow of the first water inlet channel 14+the output flow of salt suction channel 13), the brine concentration in the brine tank 11 remains Certain (generally the concentration of saturated brine), the current regeneration solution concentration can be calculated according to the above formula. The flow rate of the regeneration liquid is detected by the flow meter 34, and the detection result is fed back to the controller. The controller calculates the current concentration of the regeneration liquid according to the above formula, and then compares the calculated current concentration of the regeneration liquid with the built-in target concentration of the regeneration liquid. Contrast; if the target concentration is not reached, the controller controls the flow adjustment unit to adjust the output flow of at least one of the first water inlet channel 14 and the salt absorption channel 13, until the target concentration is reached, the controller controls the flow adjustment unit to stop the adjustment , at this time, the concentration of the regeneration solution transported by the confluence channel 15 to the resin tank 12 remains stable. Alternatively, the detection unit may include a salinity meter 35 and a flow meter 34 at the same time, and the salt concentration of the regenerated liquid is detected by the salinity meter 35, and the flow rate of the regenerated liquid is controlled by the flow meter 34, so as to control the salt consumption and the regeneration effect; generally In other words, the regeneration flow rate is controlled to be 2-8BV (1BV (L/h) = flow rate (L/h)/resin volume (L)).

The technical solution of the present application detects the flow rate and/or concentration of the liquid passing through the confluence channel 15 through the detection unit, and feeds back the detection result to the controller, and the controller obtains the current regeneration liquid concentration directly or through calculation according to the information fed back by the detection unit , and compare the current regeneration liquid concentration with the built-in regeneration liquid target concentration, and control the working state of the flow adjustment unit according to the comparison result, and then through the flow adjustment unit, at least the first water inlet channel 14 and the salt absorption channel 13 The output flow of one is adjusted until the current concentration of the regeneration solution reaches the target concentration of the regeneration solution. In this way, the concentration and flow rate of the regeneration solution can be controlled and adjusted in real time, and the regeneration effect can be adjusted to meet different usage requirements.

For example, when the hardness of the raw water is constant, the lower the salt concentration of the regeneration solution, the higher the salt efficiency. Then by reducing the salt concentration of the regeneration solution, the minimum amount of salt can be used, which can meet the requirements of small product volume and convenient salt addition. The frequency of salt addition can be high, and the usage scenario or product form with low water consumption. The higher the salt concentration of the regeneration solution, the higher the degree of regeneration. Then, by increasing the salt concentration of the regeneration solution, the water consumption for regeneration can be large, which can meet the requirements of large product volume, inconvenient salt addition, and relatively low frequency of salt addition. Use scenarios or product forms with low water consumption.

Salt effect = (water volume L*raw water hardness mg/L)/salt volume used for regeneration g;

Regeneration degree = (water volume L*raw water hardness mg/L when the outlet water hardness reaches the set value after regeneration)/theoretical total adsorption capacity of filled resin mg;

For another example, when the hardness of the raw water changes, under different hardness conditions, the hardness of the raw water is different, and the effect of regeneration is different. Higher regeneration effect, but in the case of low hardness (<150mg/L), too high regeneration brine concentration will cause waste of salt, so the salt concentration of the regeneration solution should be lowered.

In one of the embodiments, the flow regulating unit includes an adjustable-speed water pump 16 provided in the salt suction channel 13 . Specifically, the salt suction passage 13 is provided with a speed-adjustable water pump 16, and the water pump of the speed-adjustable water pump 16 has self-priming and speed-regulating functions. Extraction, no need to set the ejector structure. When the speed of the speed-adjustable water pump 16 is adjusted, the water supply flow rate of the speed-adjustable water pump 16 can be adjusted, and then the output flow rate of the salt absorption channel 13 can be adjusted, thereby realizing the adjustment of the concentration of the regeneration liquid and the flow rate of the regeneration liquid . There are many types of speed-adjustable water pumps 16, as long as the self-priming and speed-regulating functions can be realized. For example, the speed-adjustable water pump 16 is any one of a diaphragm pump, a vane pump and a plunger pump.

In one of the embodiments, as shown in FIG. 3 , the salt suction channel 13 is provided with a one-way valve 18, and the one-way valve 18 is located on the water outlet side of the speed-adjustable water pump 16, and the one-way valve 18 Used to limit backflow of liquid towards the pump. By setting the one-way valve 18, the solution in the resin tank 12 can be prevented from entering the speed-adjustable water pump 16 through the confluence channel 15 and the salt suction channel 13, and then being poured back into the salt tank 11, so as to ensure the operation reliability of the entire waterway system.

In one of the embodiments, the flow regulating unit includes a flow valve 17 provided in the salt suction channel 13 and/or the first water inlet channel 14 . In this embodiment, the flow valve 17 is an adjustable flow valve that can realize flow adjustment. For example, a flow valve 17 is provided on the salt inhalation channel 13, and the output flow of the salt inhalation channel 13 can be adjusted through the flow valve 17; or A flow valve 17 is provided on the first water inlet channel 14, and the output flow rate of the first water inlet channel 14 can be adjusted through the flow valve 17; Valve 17, so that the output flow of the first water inlet channel 14 and the salt suction channel 13 can be adjusted. The effect of adjusting the concentration of the regeneration solution and the flow rate of the regeneration solution can be realized through the above-mentioned several methods.

In one embodiment, as shown in FIG. 3 , the flow regulating unit includes a speed-adjustable water pump 16 provided in the salt suction channel 13 and a flow valve 17 provided in the first water inlet channel 14 . When the speed-adjustable water pump 16 is turned on, the brine in the brine tank 11 can be drawn out with the water pump as power, without the need for an ejector structure. When the speed of the speed-adjustable water pump 16 is adjusted, the water supply flow rate of the speed-adjustable water pump 16 can be adjusted, and then the output flow rate of the salt absorption channel 13 can be adjusted. In this embodiment, the flow valve 17 may be a fixed flow valve or an adjustable flow valve. When the flow valve 17 is a fixed flow valve, by adjusting the speed-adjustable water pump 16, the concentration of the regeneration liquid can be adjusted. When the flow valve 17 is an adjustable flow valve, the output flow of the first water inlet channel 14 can be adjusted through the flow valve 17, and the regeneration liquid concentration can be realized by adjusting at least one of the speed-adjustable water pump 16 and the flow valve 17. adjust. On the basis of this embodiment, the detection unit includes a flow meter 34 and a salinity meter 35 . By adjusting the outlet water flow rate of the flow valve 17 and the speed-adjustable water pump 16, the closed-loop management is performed through the flow meter 34 and the salinity meter 35, thereby forming different concentrations of regenerated brine.

On the basis of the above embodiments, the water system of the water softener further includes a first control valve 19 arranged in the first water inlet passage 14, and the first control valve 19 is used to open or close the first Water inlet channel 14.

In an embodiment, the regeneration mode may specifically include a first regeneration mode and a second regeneration mode. In the first regeneration mode, the first control valve 19 is opened, the first water inlet channel 14 is in a conduction state, and the speed-adjustable water pump 16 The brine in the salt tank 11 is pumped to the salt suction channel 13, and then mixed with the tap water output from the first water inlet channel 14 to form a regeneration liquid, which is transported to the resin tank 12 through the confluence channel 15 for regeneration; in the second regeneration mode , the first control valve 19 is closed, the first water inlet channel 14 is in a cut-off state, and the speed-adjustable water pump 16 draws out the brine in the brine tank 11 and transports it to the resin tank 12 through the salt suction channel 13 and the confluence channel 15 for regeneration.

Further, please refer to FIG. 3 , the water system of the water softener further includes a water injection channel 20 and a second control valve 21 located in the water injection channel 20 , the water injection channel 20 connects the first water inlet channel 14 and the The brine tank 11 communicates, and the second control valve 21 is used to open or close the water injection channel 20 . Specifically, when both the first control valve 19 and the second control valve 21 are opened, the first water inlet channel 14 communicates with the brine tank 11 via the water injection channel 20 to form a water injection channel, so that a certain amount of water can be injected into the brine tank 11, To dissolve the salt grains 32 in the salt tank 11.

In order to achieve the effect of dynamic circulation salt dissolution, further, the water system of the water softener also includes a connecting channel 22 and a third control valve 23 arranged in the connecting channel 22, the connecting channel 22 connects the confluence channel 15 In communication with the first water inlet channel 14 , the third control valve 23 is used to open or close the connecting channel 22 . Specifically, in the salt-dissolving mode, the speed-adjustable water pump 16 pumps out the brine in the salt tank 11, and then transports the brine to the In the salt box 11; reciprocating in this way, dynamic salt dissolution is realized; compared with the traditional static immersion salt dissolution, the technical solution of the application dissolves salt through dynamic circulation flow, and it can also dissolve salt when the volume of salt is less than water. Soluble to saturation, so saving salt can be achieved to a certain extent.

In order to discharge the water in the resin tank in time under regeneration, backwashing, backflushing and other modes, further, the water system of the water softener also includes a drainage channel 27 and a fourth control valve located in the drainage channel 27. A valve 28 , the drainage passage 27 communicates with the resin tank 12 , and the fourth control valve 28 is used to open or close the drainage passage 27 .

Further, the water system of the water softener has a regeneration mode, and in the regeneration mode, both the first control valve 19 and the fourth control valve 28 are in an open state, and the second control valve 21 and all The third control valve 23 is all in the closed state, the salt tank 11, the salt suction channel 13, the first water inlet channel 14, the confluence channel 15, the resin tank 12 and the drainage channel 27 Connected in sequence to form a regeneration waterway. Specifically, in the regeneration mode, the tap water is delivered to the confluence channel 15 through the water inlet A and the first water inlet channel 14, and the brine is mixed with the tap water to form a regeneration liquid, which is transported to the resin tank 12 through the confluence channel 15, and is connected with the resin tank 12. The ion exchange resin 33 is regenerated by contact, and the regenerated waste water is transported to the drain C through the drain channel 27 .

In a specific embodiment, as shown in FIG. 3 , the resin tank 12 has a first port 121 and a second port 122, the first port 121 can be the water inlet of the resin tank 12, and the second port 122 can be the water inlet of the resin tank 12. Outlet. The water inlet end of the salt absorption channel 13 communicates with the water outlet of the salt box 11 , the water outlet end of the salt absorption channel 13 merges with the water outlet end of the first water inlet channel 14 and communicates with the second port 122 of the resin tank 12 via the confluence channel 15 , The salt suction channel 13 is provided with an adjustable speed water pump 16 . The first water inlet channel 14 is provided with a flow valve 17 and a first control valve 19 . The water inlet end of the water injection channel 20 communicates with the first water inlet channel 14, and the intersection point of the water injection channel 20 and the first water inlet channel 14 is located between the upstream of the flow valve 17 and the downstream of the first control valve 19, and the water injection channel 20 The water outlet communicates with the water inlet of the salt tank 11 , and the water injection channel 20 is provided with a second control valve 21 . The connecting channel 22 communicates the first water inlet channel 14 with the confluence channel 15, and the junction of the connecting channel 22 and the first water inlet channel 14 is located between the upstream of the flow valve 17 and the downstream of the first control valve 19, and the connecting channel 22 is provided with a third control valve 23 . The drain passage 27 communicates with the first port 121 of the resin tank 12 , and the drain passage 27 is provided with a fourth control valve 28 .

By controlling the operating states of the adjustable-speed water pump 16, the first control valve 19, the second control valve 21, the third control valve 23 and the fourth control valve 28, the water softener can switch between various functional modes .

In the water injection mode, the speed-adjustable water pump 16 is closed, the first control valve 19 and the second control valve 21 are both open, and the third control valve 23 and the fourth control valve 28 are both closed. Tap water enters the first water inlet channel 14 through the water inlet A, and then is delivered to the water injection channel 20 through the first water inlet channel 14, and then injected into the brine tank 11 through the water injection channel 20 to mix with the salt particles 32 in the brine tank 11.

In the salt-dissolving mode, the speed-adjustable water pump 16 is turned on, the second control valve 21 and the third control valve 23 are both turned on, and the first control valve 19 and the fourth control valve 28 are both turned off. The speed-adjustable water pump 16 pumps out the brine in the brine tank 11, and then transports it to the brine tank 11 through the salt suction channel 13, the confluence channel 15, the connecting channel 22, the first water inlet channel 14 and the water injection channel 20; Realize dynamic salt dissolution.

In the recoil mode, the speed-adjustable water pump 16 is closed, the first control valve 19 , the third control valve 23 and the fourth control valve 28 are all open, and the second control valve 21 is closed. Tap water enters the first water inlet channel 14 through the water inlet A, and then is transported to the connecting channel 22 through the first water inlet channel 14, and then enters the resin tank 12 through the connecting channel 22, the confluence channel 15 and the second port 122, and finally Then output to the drain C through the first port 121 and the drain channel 27 for discharge. Wherein, the recoil mode may include recoil before regeneration and recoil after regeneration.

In regeneration mode, the speed-adjustable water pump 16 is turned on, the first control valve 19 and the fourth control valve 28 are both opened, and the second control valve 21 and the third control valve 23 are both closed. The speed-adjustable water pump 16 pumps out the brine in the brine tank 11 and sends it to the confluence channel 15 through the salt suction channel 13, and the tap water is transported to the confluence channel 15 through the water inlet A and the first water inlet channel 14, and the brine and tap water are mixed to form regeneration The liquid is transported to the resin tank 12 through the confluence channel 15 , and is regenerated by contacting with the ion exchange resin 33 in the resin tank 12 , and the regenerated waste water is transported to the drain C through the drain channel 27 . It should be noted that, in the regeneration mode, the first control valve 19 may also be closed to directly pump the brine in the brine tank 11 to the resin tank 12 for regeneration without mixing with tap water.

In the backwash mode, the speed-adjustable water pump 16 is turned off, the first control valve 19 and the fourth control valve 28 are both opened, and the second control valve 21 and the third control valve 23 are both closed. The tap water is sent to the confluence channel 15 through the water inlet A and the first water inlet channel 14 , then to the resin tank 12 through the confluence channel 15 , and finally to the drain port C through the drain channel 27 to flush out the residual brine after regeneration.

In one of the embodiments, the water system of the water softener further includes a second water inlet channel 29 and a water outlet channel 30, the second water inlet channel 29 communicates with the first port 121, and the water outlet channel 30 communicates with the first port 121. The second port 122 communicates. In normal operation mode, the speed-adjustable water pump 16 is closed, and the first control valve 19 , the second control valve 21 , the third control valve 23 and the fourth control valve 28 are all closed. Tap water (raw water) enters the resin tank 12 through the second water inlet channel 29 and the first port 121, and the raw water contacts the ion exchange resin 33 in the resin tank 12, and the calcium and magnesium ions in the raw water are absorbed by the ion exchange resin 33 to obtain softening. The water, the demineralized water, is delivered to the user's water port B through the second port 122 and the water outlet channel 30, where the water port B can be used to connect to a faucet or other water equipment.

In addition, in some occasions that do not require high water quality, users do not need to use softened water. In order to provide users with unsoftened raw water more conveniently, in one of the embodiments, the water system of the water softener A bypass channel 31 is also included, and the bypass channel 31 communicates the second water inlet channel 29 with the water outlet channel 30 . In this way, the raw water delivered by the second water inlet channel 29 enters into the water outlet channel 30 through the bypass channel 31 , and then is delivered to the water outlet B of the user through the water outlet channel 30 . The waterway system of the water softener may include a switching valve (not shown) located at the bypass channel 31, through which the switch between the softened waterway and the direct water supply waterway can be realized.

The present application also proposes a regeneration control method for the waterway system of a water softener. The waterway system of the water softener includes a salt tank 11, a resin tank 12, a salt absorption channel 13, a first water inlet channel 14, a confluence channel 15, a flow rate Regulating unit, detecting unit and controller (not shown). The water inlet end of the salt suction channel 13 communicates with the salt tank 11, the water outlet end of the salt suction channel 13 merges with the water outlet end of the first water inlet channel 14 and connects with the The resin tank 12 is connected; the flow adjustment unit is used to adjust the output flow of at least one of the salt absorption channel 13 and the first water inlet channel 14; the detection unit is arranged in the confluence channel 15, It is used to detect the flow and/or concentration of the liquid passing through the confluence channel 15; the flow adjustment unit and the detection unit are respectively electrically connected to the controller, and the controller is used to The feedback information controls the flow regulating unit to perform flow regulation.

Please refer to FIG. 5, in the first embodiment, the regeneration control method includes the following steps:

S1. Determine the target concentration of the regeneration solution;

S2. Acquiring the current regeneration solution concentration;

S3. Adjust the flow regulating unit until the current concentration of the regeneration solution reaches the target concentration.

Specifically, in this embodiment, the regeneration liquid refers to the regeneration brine formed after mixing the salt water output from the salt suction channel 13 and the tap water output from the first water inlet channel 14 in the confluence channel 15, and the target concentration of the regeneration liquid refers to the subsequent The concentration of the regeneration brine used in the regeneration process to exchange with the ion exchange resin 33 in the resin tank 12 . The concentration of the regeneration solution currently flowing through the confluence channel 15 detected by the detection unit is the current concentration of the regeneration solution. Wherein, the detection unit may include a salinity meter or other forms of concentration sensors arranged in the confluence channel. After the detection unit detects the current concentration of the regeneration solution, the result is fed back to the controller, and the controller adjusts the flow adjustment unit according to the feedback result until the current concentration of the regeneration solution reaches the target concentration, so that the required target concentration can be stably delivered to the resin tank 12 regeneration fluid. Wherein, the controller may include a main control module and an output adjustment module, the detection unit is electrically connected to the main control module, and the flow adjustment unit is electrically connected to the output adjustment module. The detection unit feeds back the detected concentration of the current regeneration solution to the main control module, and the main control module compares the current concentration of the regeneration solution with the target concentration. If the current concentration of the regeneration solution does not reach the target concentration, the main control module sends an adjustment signal to the output adjustment module , the output adjustment module adjusts the flow adjustment unit according to the received adjustment signal.

Through the above-mentioned regeneration control method, the concentration of the regeneration solution can be controlled and adjusted in real time, and the regeneration effect can be adjusted to meet different usage requirements. For example, when the hardness of the raw water is constant, the lower the salt concentration of the regeneration solution, the higher the salt efficiency. Then, by lowering the salt concentration of the regeneration solution through the above regeneration control method, the minimum amount of salt can be used, which can meet the requirements of smaller products. , It is convenient to add salt, the frequency of adding salt can be higher, and the use scene or product form with small water consumption. The higher the salt concentration of the regeneration solution, the higher the degree of regeneration, then the above-mentioned regeneration control method can be used to increase the salt concentration of the regeneration solution to achieve a large amount of water for regeneration, which can meet the requirements of large product volume and inconvenient addition of salt. , use scenarios or product forms with low salt addition frequency and large water consumption. For another example, when the hardness of the raw water changes, under different hardness conditions, the hardness of the raw water is different, and the regeneration effect is different. In the case of high hardness (>300mg/L), the salt concentration of the regeneration solution is increased to achieve higher In the case of low hardness (<150mg/L), lower the salt concentration of the regeneration solution to avoid waste of salt.

Further, please refer to Fig. 6, in the second embodiment, on the basis of the first embodiment, S1, the method for determining the target concentration of the regeneration solution includes:

S1a, setting the target concentration of the regeneration liquid; or, S1b, calculating the target concentration of the regeneration liquid according to the preset parameters of the flow regulating unit and the brine concentration in the brine tank 11 .

For example, in one embodiment, the target concentration of the regeneration liquid can be directly set according to the concentration required for the subsequent regeneration process. In another embodiment, after setting the preset parameters of the flow regulating unit, the target concentration of the regeneration solution can be calculated according to the preset parameters of the flow regulating unit and the concentration of brine in the brine tank 11 .

Please refer to Fig. 7, in the third embodiment, the flow regulating unit includes a speed-adjustable water pump 16 arranged in the salt suction passage 13 and a flow valve 17 arranged in the first water inlet passage; On the basis of the embodiments, S1b, the step of calculating and obtaining the target concentration of the regeneration liquid according to the preset parameters of the flow regulating unit includes:

Set the flow rate of the speed-adjustable water pump 16 and the flow rate of the flow valve 17;

The target concentration of the regeneration solution is calculated according to the flow rate of the speed-adjustable water pump 16, the flow rate of the flow valve 17 and the brine concentration in the brine tank.

Specifically, the regeneration liquid concentration=(the output flow of the speed-adjustable water pump 16×the outlet water concentration of the speed-adjustable water pump 16)/(the output flow of the speed-adjustable water pump 16+the output flow of the flow valve 17), wherein, the speed-adjustable water pump 16 The outlet water concentration is the same as the brine concentration in the brine tank 11, and the brine concentration in the brine tank 11 is a definite value (generally saturated brine concentration), when the flow rate of the adjustable speed water pump 16 and the flow rate of the flow valve 17 are preset , the output flow of the speed-adjustable water pump 16 and the output flow of the flow valve 17 are known quantities, so the target concentration of the regeneration liquid can be calculated by the above formula.

Please refer to Fig. 8, in the fourth embodiment, the flow regulating unit includes an adjustable speed water pump 16 arranged in the salt suction channel and a flow valve 17 arranged in the first water inlet channel, in the first embodiment On the basis of the example, S3, the steps of adjusting the flow regulating unit until the current concentration of the regeneration solution reaches the target concentration include:

S31, adjusting the rotational speed of the speed-adjustable water pump 16 and/or the flow rate of the flow valve 17;

S32. Comparing the current regeneration solution concentration with the target concentration;

When the current regeneration liquid concentration does not reach the target concentration, return to step S31 to continue adjusting the speed of the adjustable-speed water pump 16 and/or the flow rate of the flow valve 17;

S33. When the current regeneration solution concentration reaches the target concentration, stabilize the rotational speed of the speed-adjustable water pump 16 and the flow rate of the flow valve 17 .

Specifically, the regeneration liquid concentration = (the output flow rate of the speed-adjustable water pump 16 × the outlet water concentration of the speed-adjustable water pump 16)/(the output flow rate of the speed-adjustable water pump 16 + the output flow rate of the flow valve 17) Adjusting one of the flow rate of the water pump 16 and the flow rate of the flow valve 17, or both, can realize the adjustment of the regeneration liquid concentration. Wherein, the speed-adjustable water pump 16 can realize flow regulation through speed regulation. The detection unit continuously detects the current concentration of the regeneration solution and feeds it back to the controller, and the controller compares the current concentration of the regeneration solution with the target concentration. When the current concentration of the regeneration solution does not reach the target concentration after comparison, the controller continues to control and adjust the speed of the speed-adjustable water pump 16 and/or the flow rate of the flow valve 17. target concentration. After comparison, when the current regeneration liquid concentration reaches the target concentration, the speed of the speed-adjustable water pump 16 and the flow rate of the flow valve 17 are stabilized, and a stable regeneration mode is entered.

In addition to the above-mentioned regeneration control method, the concentration adjustment of the regeneration solution can also be realized by other methods. Please refer to Fig. 9, in the fifth embodiment, the flow regulating unit includes an adjustable speed water pump 16 arranged in the salt suction channel 13 and a flow valve 17 arranged in the first water inlet channel 14; On the basis of an embodiment, S3, the step of adjusting the flow rate adjustment unit until the current regeneration solution concentration reaches the target concentration includes:

S310, adjusting the flow valve 17 to a preset flow;

S320. Determine the theoretical rotational speed of the speed-adjustable water pump 16 when the regeneration liquid reaches the target concentration;

S330. Adjust the speed of the speed-adjustable water pump 16 to a theoretical speed;

S340. Comparing the current regeneration solution concentration with the target concentration;

S350. When the current regeneration solution concentration reaches the target concentration, the speed-adjustable water pump 16 keeps running at a theoretical speed;

S360. When the current concentration of the regeneration solution does not reach the target concentration, adjust the speed of the speed-adjustable water pump 16 until the current concentration of the regeneration solution reaches the target concentration.

Specifically, in practical applications, the tap water pressure at the water inlet end of the first water inlet channel 14 is usually unstable, and the flow valve 17 is provided to ensure that the flow of tap water passing through the flow valve 17 remains stable. When adjusting the regeneration liquid concentration, open the flow valve 17, and the speed-adjustable water pump 16 is in the closed state. At this time, only the first water inlet channel 14 delivers tap water, and the flow valve 17 is adjusted to the preset flow rate to ensure that the first water inlet The output flow of the water channel 14 is a constant preset flow. Then according to the formula: regeneration liquid concentration=(output flow of adjustable speed water pump 16×water concentration of adjustable speed water pump 16)/(output flow of adjustable speed water pump 16+output flow of flow valve 17), the regeneration liquid can be calculated When the target concentration is reached, the theoretical output flow of the speed-adjustable water pump 16 is calculated, and the calculated theoretical output flow of the speed-adjustable water pump 16 is converted into the theoretical rotational speed of the speed-adjustable water pump 16 . Then turn on the speed-adjustable water pump 16 and adjust the speed of the speed-adjustable water pump 16 to the theoretical speed. Ideally, when the flow rate of the flow valve 17 is the preset flow rate and the rotational speed of the speed-adjustable water pump 16 is the theoretical rotational speed, the final concentration of the regenerated liquid is consistent with the target concentration. However, in practical applications, considering the influence of factors such as the type of the speed-adjustable water pump 16 and its own wear and tear, the above ideal state cannot be ensured. Therefore, after adjusting the rotational speed of the adjustable-speed water pump 16 to the theoretical rotational speed, it is necessary to continue to detect the current regeneration liquid concentration, and compare the current regeneration liquid concentration with the target concentration. When the current regeneration liquid concentration reaches the target concentration, the adjustable-speed water pump 16 Keep running at the theoretical speed; when the current concentration of the regeneration solution does not reach the target concentration, adjust the speed of the adjustable speed water pump 16 until the current concentration of the regeneration solution reaches the target concentration, so as to realize the closed-loop management of the entire system and ensure that the concentration of the regeneration solution can be accurately Adjust to desired target concentration.

In addition, in the regeneration process, in addition to the requirements on the concentration of the regeneration liquid, it is also necessary to keep the flow rate of the regeneration liquid within a certain range in order to achieve a better regeneration effect. Generally speaking, the regeneration flow rate is controlled to be 2-8BV (1BV (L/h) = flow rate (L/h)/resin volume (L)).

In one of the embodiments, the above regeneration control method further includes the following steps;

Determine the target flow rate of the regeneration fluid;

Obtain the current regeneration fluid flow rate;

Adjust the flow adjustment unit until the current flow of regeneration fluid reaches the target flow.

Specifically, referring to FIG. 10, in the sixth embodiment, the regeneration control method includes the following steps:

S100. Determine the target concentration and target flow rate of the regeneration liquid;

S200. Obtain the current concentration of the regeneration solution and the current flow rate of the regeneration solution;

S300. Adjust the flow regulating unit until the current regeneration liquid concentration reaches the target concentration, and the current regeneration liquid flow rate reaches the target flow rate.

Specifically, in this embodiment, the target flow rate of the regeneration liquid is determined, for example, 2 to 8 BV; the current flow rate of the regeneration liquid through the confluence channel 15 is detected by the detection unit, and the detection unit may specifically include a flow meter or other type of flow sensor. After the detection unit detects the current flow rate of the regeneration liquid, the result is fed back to the controller, and the controller adjusts the flow adjustment unit according to the feedback result until the current flow rate of the regeneration liquid reaches the target flow rate. The detection unit feeds back the detected flow rate of the current regenerated liquid to the main control module, and the main control module compares the current flow rate of the regenerated liquid with the target flow rate, and if the current flow rate of the regenerated liquid does not reach the target flow rate, the main control module sends an adjustment signal to the output adjustment module , the output adjustment module adjusts the flow adjustment unit according to the received adjustment signal. That is to say, by adjusting the flow regulating unit, the regeneration liquid can finally reach the target concentration and target flow at the same time, so as to achieve better regeneration effect.

Please refer to Fig. 11, in the seventh embodiment, on the basis of the above-mentioned embodiment, S3, when the current regeneration solution concentration reaches the target concentration, the following steps are also included:

S4. Judging whether salt inhalation is completed according to preset conditions;

S5. When the salt suction is completed, stop continuing to suck salt from the salt tank.

Specifically, when the current concentration of the regeneration solution reaches the target concentration, the water system of the water softener enters a stable regeneration mode, and the brine in the brine tank 11 is continuously extracted through the regeneration water circuit, mixed with tap water, and then sent to the resin tank 12 for regeneration. During this process, the controller judges whether the salt inhalation is completed according to the preset conditions, and stops continuing to inhale salt from the salt box 11 when it is judged that the salt inhalation is completed.

Wherein, the preset condition for judging the completion of salt inhalation can be set according to the actual situation.

For example, in one of the embodiments, when the concentration of the current regeneration solution continues to drop for a period of time and finally reaches zero, it is judged that the salt absorption is completed. In this embodiment, when the concentration of the current regeneration solution continues to drop for a period of time and finally reaches zero, it indicates that the brine in the brine tank 11 has been pumped out, so it is judged that the salt suction is completed based on this condition. Can be by closing the speed-adjustable water pump 16 that is located at the salt suction channel 13 this moment, stop continuing to suck salt from the brine tank 11.

Of course, in some embodiments, the ion-exchange resin 33 in the resin tank 12 can also reach the expected regeneration effect as the standard for salt absorption. Under this standard, it is not necessary to completely absorb the brine in the salt tank 11. When it is necessary to ensure that the total flow rate of the regeneration liquid delivered to the resin tank 12 reaches a preset value, it can be ensured that the ion exchange resin 33 in the resin tank 12 can achieve the expected regeneration effect. Based on this, in another embodiment, when the total flow rate of the regeneration liquid reaches a preset value within a preset time period, it is judged that the salt absorption is completed. Specifically, the detection unit can continuously detect the flow rate of the regeneration liquid passing through the confluence channel 15, so as to calculate the total flow rate of the regeneration liquid within a preset time period, compare the total flow rate of the regeneration liquid with a preset value, and when it reaches the preset value , it indicates that the expected regeneration effect has been achieved, and there is no need to perform salt absorption, so it is judged that the salt absorption is completed based on this condition. Can be by closing the speed-adjustable water pump 16 that is located at the salt suction channel 13 this moment, stop continuing to suck salt from the brine tank 11.

It should be noted that the foregoing describes specific embodiments of this specification. Other implementations are within the scope of the following claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. Multitasking and parallel processing are also possible or may be advantageous in certain embodiments.

The present application also proposes a water softener, which includes a waterway system of the water softener. For the specific structure of the waterway system of the water softener, refer to the above-mentioned embodiments. Since this water softener adopts all the technical solutions of all the above-mentioned embodiments, at least All the beneficial effects brought by the technical solutions of the above embodiments will not be repeated here.

The above are only preferred embodiments of the present application, and are not therefore limiting the patent scope of the present application. Under the inventive concept of the present application, the equivalent structural transformations made by using the description of the application and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present application.

Claims (20)

1. A waterway system of a water softener, characterized in that it comprises:

   salt tank;

   Resin tank;

   A salt suction channel, a first water inlet channel and a confluence channel, the water inlet end of the salt suction channel communicates with the salt tank, the water outlet end of the salt absorption channel merges with the water outlet end of the first water inlet channel and communicating with the resin tank via the flow channel;

   A flow adjustment unit, configured to adjust the output flow of at least one of the salt suction channel and the first water inlet channel;

   a detection unit, arranged in the confluence channel, for detecting the flow rate and/or concentration of the liquid passing through the confluence channel; and

   The controller, the flow adjustment unit and the detection unit are respectively electrically connected to the controller, and the controller is used to control the flow adjustment unit to perform flow regulation according to the information fed back by the detection unit.
2. The waterway system of the water softener according to claim 1, wherein the flow regulating unit comprises a speed-adjustable water pump arranged in the salt suction channel.
3. The waterway system of the water softener according to claim 2, wherein the salt suction channel is provided with a one-way valve, and the one-way valve is located on the water outlet side of the speed-adjustable water pump, and the one-way valve is used for To limit the backflow of liquid towards the adjustable speed water pump.
4. The waterway system of the water softener according to claim 1, wherein the flow regulating unit comprises a flow valve arranged in the salt suction channel and/or the first water inlet channel.
5. The waterway system of a water softener according to claim 1, wherein the detection unit comprises a flow meter and/or a salinity meter.
6. The waterway system of the water softener according to claim 1, wherein the flow regulating unit includes an adjustable-speed water pump arranged in the salt suction passage and a flow valve arranged in the first water inlet passage; The detection unit includes a flow meter and a salinity meter.
7. The waterway system of a water softener according to any one of claims 1 to 6, further comprising a first control valve arranged in the first water inlet channel, the first control valve is used to open or close The first water inlet channel.
8. The waterway system of the water softener according to claim 7, further comprising a water injection channel and a second control valve arranged in the water injection channel, the water injection channel connects the first water inlet channel and the salt tank, and the second control valve is used to open or close the water injection channel.
9. The waterway system of the water softener according to claim 8, further comprising a connecting channel and a third control valve provided in the connecting channel, the connecting channel connecting the confluence channel and the first water inlet The channel is connected, and the third control valve is used to open or close the connecting channel.
10. The waterway system of the water softener according to claim 9, further comprising a drainage channel and a fourth control valve arranged in the drainage channel, the drainage channel communicates with the resin tank, and the fourth control valve A valve is used to open or close the drainage channel.
11. The waterway system of the water softener according to claim 10, wherein the waterway system of the water softener has a regeneration mode, and in the regeneration mode, both the first control valve and the fourth control valve are in the In the open state, the second control valve and the third control valve are in the closed state, the salt tank, the salt suction channel, the first water inlet channel, the confluence channel, the resin tank and The drainage channels are connected in sequence to form a regeneration waterway.
12. A regeneration control method for the waterway system of the water softener as claimed in claim 1, characterized in that it comprises the following steps:

    Determine the target concentration of the regeneration solution;

    Obtain the current regeneration solution concentration;

    Adjust the flow adjustment unit until the current regeneration solution concentration reaches the target concentration.
13. The regeneration control method according to claim 12, wherein the method for determining the target concentration of the regeneration liquid comprises:

    Set the target concentration of the regeneration liquid; or, calculate the target concentration of the regeneration liquid according to the preset parameters of the flow regulating unit and the brine concentration in the brine tank.
14. The regeneration control method according to claim 13, characterized in that, the flow regulating unit comprises an adjustable speed water pump arranged in the salt suction channel and a flow valve arranged in the first water inlet channel; The steps of calculating the target concentration of the regenerating solution with preset parameters include:

    Set the flow rate of the adjustable speed water pump and the flow rate of the flow valve;

    The target concentration of the regeneration solution is calculated according to the flow rate of the speed-adjustable water pump, the flow rate of the flow valve and the brine concentration in the brine tank.
15. The regeneration control method according to claim 12, characterized in that, the flow regulating unit includes an adjustable-speed water pump arranged in the salt suction channel and a flow valve arranged in the first water inlet channel, and the regulating flow regulating unit, The steps until the current regeneration solution concentration reaches the target concentration include:

    Adjust the speed of the adjustable speed water pump and/or the flow of the flow valve;

    Compare the current regeneration solution concentration with the target concentration;

    When the current regeneration solution concentration does not reach the target concentration, continue to adjust the speed of the adjustable speed water pump and/or the flow rate of the flow valve;

    When the current concentration of the regeneration liquid reaches the target concentration, the speed of the speed-adjustable water pump and the flow rate of the flow valve are stabilized.
16. The regeneration control method according to claim 12, characterized in that, the flow regulating unit comprises an adjustable speed water pump arranged in the salt suction channel and a flow valve arranged in the first water inlet channel; the regulating flow regulating unit, The steps until the current regeneration solution concentration reaches the target concentration include:

    Adjust the flow valve to the preset flow;

    Determine the theoretical speed of the speed-adjustable water pump when the regeneration liquid reaches the target concentration;

    Adjust the speed of the adjustable speed water pump to the theoretical speed;

    Compare the current regeneration solution concentration with the target concentration;

    When the current regeneration solution concentration reaches the target concentration, the adjustable speed water pump will keep running at the theoretical speed;

    When the current concentration of the regeneration solution does not reach the target concentration, the speed of the adjustable-speed water pump is adjusted until the current concentration of the regeneration solution reaches the target concentration.
17. The regeneration control method according to claim 12, further comprising the following steps;

    Determine the target flow rate of the regeneration fluid;

    Obtain the current regeneration fluid flow rate;

    Adjust the flow adjustment unit until the current flow of regeneration fluid reaches the target flow.
18. The regeneration control method according to any one of claims 12 to 17, characterized in that, after the current concentration of the regeneration solution reaches the target concentration, the following steps are further included:

    Judging whether the salt inhalation is completed according to the preset conditions;

    When salt suction is complete, stop further salt suction from the salt tank.
19. The regeneration control method according to claim 18, wherein the step of judging whether salt absorption is completed according to preset conditions comprises:

    When the concentration of the current regeneration solution continues to drop for a period of time and finally reaches zero, it is judged that the salt absorption is completed;

    Alternatively, when the total flow rate of the regeneration liquid reaches a preset value within a preset time period, it is judged that the salt absorption is completed.
20. A water softener, characterized by comprising the waterway system of the water softener according to any one of claims 1-11.

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