CN117658248A

CN117658248A - Control method of water purifying equipment

Info

Publication number: CN117658248A
Application number: CN202311542342.1A
Authority: CN
Inventors: 朱泽春; 陶玉强
Original assignee: Joyoung Co Ltd
Current assignee: Joyoung Co Ltd
Priority date: 2023-11-20
Filing date: 2023-11-20
Publication date: 2024-03-08

Abstract

The application provides a control method of water purifying equipment, which comprises the following steps: pre-conditioning stage: receiving a water taking instruction of a user, detecting and acquiring cold pump flow S1 of the cold water pump, and adjusting the flow output of the booster pump according to a comparison result of the cold pump flow S1 and a preset flow threshold S0; and (3) a temperature adjusting stage: adjusting the power output of the heating unit and/or the flow output of the cold water pump to enable the actual water outlet temperature T1 of the water mixing unit to reach the target temperature T0 indicated by the water taking instruction; reflux regulation stage: and regulating the flow output of the booster pump according to the current actual water outlet temperature T1, and when the actual water outlet temperature T0 reaches the target temperature T0 again, maintaining the flow output of the booster pump until a user stops taking water. In this application, can guarantee under the circumstances of water temperature, the furthest reduces the volume of backward flow water in the backward flow water route.

Description

Control method of water purifying equipment

Technical Field

The application relates to the technical field of water purifying equipment, in particular to a control method of water purifying equipment.

Background

Along with the improvement of the life quality of people, water purifying equipment such as water purifiers and the like are increasingly widely applied to the daily life of people.

The existing water purifying equipment comprises a water purifying unit, a water mixing unit and a water outlet unit, wherein the water outlet unit comprises a hot water outlet unit, the water mixing unit comprises a heating unit, and the water purifying unit, the water mixing unit and the hot water outlet unit can be sequentially connected to form a hot water outlet loop. When the water purifying device works, the water purifying unit outputs pure water to the water mixing unit, the heating unit in the water mixing unit heats the pure water, and the heated water is output through the hot water outlet unit. In practice, the hot water outlet loop can only output small flow of hot water due to the limitation of the heating power of the heating unit, so that the water purifying unit only needs to output small flow of pure water to the water mixing unit. However, in practice, the water purifying unit outputs a relatively large flow of pure water, and for this purpose, a return water path is usually provided between the water purifying end and the water outlet end of the water purifying unit, and the excess pure water output from the water purifying unit is returned through the return water path.

However, when the flow of the backwater water is large, the pressure in front of the membrane of the filtering part in the water purifying unit can be increased, the power of the whole machine is increased, the cost of the whole machine is increased, the vibration is large when the water purifying unit is used for preparing water, the noise is large, the user experience is influenced, meanwhile, the service life of the filter element is shortened, the filtering efficiency is reduced, and the use feeling of a user is greatly reduced.

In the prior art, the reflux amount can be reduced by directly reducing the power of the booster pump, but the mode of directly reducing the power can influence the water outlet flow of hot water, so that the water outlet amount is too small, and meanwhile, the water outlet temperature can be influenced to a certain extent, so that the use experience of a user is influenced.

Therefore, a technical scheme capable of greatly reducing the backflow water or no backflow water and simultaneously guaranteeing the water outlet flow and the water outlet temperature is needed at present.

Disclosure of Invention

The embodiment of the application aims to provide a control method of water purifying equipment, which can reduce the amount of backflow water in a backflow waterway to the greatest extent under the condition of ensuring the temperature of water outlet.

The application provides a control method of water purification equipment, wherein a water purification unit, a water mixing unit and a water outlet unit are arranged in the water purification equipment, the water mixing unit comprises a cold water pump and a heating unit, the water purification unit comprises a booster pump, and a backflow waterway is arranged between the water outlet end of the water purification unit and the water inlet end of the water purification unit;

the control method of the water purifying equipment comprises the following steps:

pre-conditioning stage: receiving a water taking instruction of a user, detecting and acquiring real-time flow S1 of the cold water pump, and adjusting flow output of the booster pump according to a comparison result of the real-time flow S1 and a preset flow threshold S0;

And (3) a temperature adjusting stage: adjusting the power output of the heating unit and/or the flow output of the cold water pump to enable the actual water outlet temperature T1 of the water mixing unit to reach the target temperature T0 indicated by the water taking instruction;

reflux regulation stage: and regulating the flow output of the booster pump according to the current actual water outlet temperature T1, and when the actual water outlet temperature T1 reaches the target temperature T0 again, maintaining the flow output of the booster pump until a user stops taking water.

In an embodiment, according to a comparison result of the real-time flow S1 and the preset flow threshold S0, adjusting the flow output of the booster pump includes:

gradually reducing the flow output of the booster pump until the difference between the real-time flow S1 and a preset flow threshold S0 accords with a preset range, and recording the current flow of the booster pump as a reference flow S;

gradually increasing the flow output of the booster pump until the flow multiple between the current outlet water flow S2 of the booster pump and the reference flow S is equal to a preset regulating coefficient.

In an embodiment, when the difference between the real-time flow S1 and the preset flow threshold S0 accords with a preset range, recording the current duty cycle of the booster pump as the reference duty cycle P0; when the flow multiple between the current water outlet flow S2 and the reference flow S of the booster pump is equal to a preset regulating coefficient, recording the current duty ratio of the booster pump as an initial duty ratio P1.

In an embodiment, the method for obtaining the preset flow threshold S0 is as follows:

after the water purification equipment is electrified, the cold water pump and the booster pump are started with rated voltage, and when the cold water pump continuously works for a preset period of time, the current flow output of the cold water pump is recorded as a preset flow threshold S0 and used for adjusting the flow output of the booster pump.

In an embodiment, in the temperature adjustment stage, calculating a theoretical water outlet flow S3 of the cold water pump according to the target temperature T0, the inlet water temperature T2 and the rated heating power P of the heating unit; and determining a temperature regulation mode according to the theoretical outlet water flow S3 of the cold water pump and the preset flow threshold S0, and regulating the power output of the heating unit and/or the flow output of the cold water pump.

In an embodiment, determining the temperature adjustment mode according to the theoretical outlet water flow S3 of the cold water pump and the preset flow threshold S0 includes:

comparing the theoretical water outlet flow S3 with the preset flow threshold S0;

if the theoretical water outlet flow S3 is greater than or equal to a preset flow threshold S0, the temperature adjustment mode is to control the cold water pump to output water at the preset flow threshold S0 and adjust the heating power of the heating unit;

If the theoretical water outlet flow S3 is smaller than a preset flow threshold S0, the temperature adjustment mode is to control the heating unit to operate at rated heating power P and adjust the real-time flow S1 of the cold water pump.

In one embodiment, the temperature adjustment mode specifically includes:

detecting the actual water outlet temperature T1 of the water mixing unit, and reducing the heating power of the heating unit or increasing the real-time flow S1 of the cold water pump when the actual water outlet temperature T1 is greater than the target temperature T0; when the actual water outlet temperature T1 is smaller than the target temperature T0, the heating power of the heating unit is increased or the real-time flow S1 of the cold water pump is reduced.

In an embodiment, according to the current actual outlet water temperature T1, adjusting the flow output of the booster pump in a manner of gradually decreasing and then gradually increasing includes:

when the actual water outlet temperature T1 is stabilized at the target temperature T0, gradually reducing the flow output of the booster pump, wherein the actual water outlet temperature T1 is kept unchanged;

continuously detecting the actual water outlet temperature T1, obtaining a comparison result of the actual water outlet temperature T1 and the target temperature T0, and gradually increasing the flow output of the booster pump when the actual water outlet temperature T1 is detected to be larger than the target temperature T0, so that the actual water outlet temperature T1 reaches the target temperature T0 again.

In an embodiment, in the step of adjusting the booster pump, if the actual outlet water temperature T1 is detected to be equal to the target temperature T0 during the step of increasing the flow output, the flow output of the booster pump is controlled in a manner of gradually decreasing and then gradually increasing again, and is controlled in a manner of circulation adjustment.

In an embodiment, when the actual outlet water temperature T1 is maintained at the target temperature T0, the current duty cycle of the booster pump is recorded as the final duty cycle P3, and is associated with the target temperature T0.

The application provides a control method of water purification equipment, firstly, a water purification unit is controlled to regulate flow output of a booster pump according to a comparison result of real-time flow S1 of a cold water pump and a preset flow threshold S0, the output quantity of the booster pump is preliminarily determined, and then the actual water outlet temperature of a water mixing unit is regulated according to the temperature of hot water required by a user. When the actual water outlet temperature is stabilized at the temperature of hot water required by a user, the flow output of the booster pump is further adjusted, and along with the adjustment of the water outlet flow of the water purifying unit, the actual water outlet temperature of the water mixing unit also changes. And when the actual water outlet temperature of the water mixing unit is equal to the temperature of hot water required by a user again, stopping adjusting the flow output of the booster pump, and controlling the booster pump to continuously output water according to the current flow output. After the water outlet flow of the booster pump is stopped to be regulated, the actual water outlet temperature of the water mixing unit can reach the temperature of hot water required by a user, and no or less water return water exists in the water return channel.

In summary, it can be seen that when the water purifying device is controlled to output hot water according to the method in the application, the amount of return water in the return water path can be reduced to the greatest extent under the condition of ensuring the actual outlet water temperature. Through reducing the volume of backward flow water in the backward flow water route, reduced the membrane front pressure of filtering part in the water purification unit, reduced complete machine power, complete machine cost reduces, vibration obviously reduces when the water purification unit system water, noise when having reduced the use, filter core life-span increases simultaneously, and filtration efficiency promotes, has promoted user's use impression.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings that are required to be used in the embodiments of the present application.

Fig. 1 is a schematic water path diagram of a water purifying apparatus according to a first embodiment of the present application;

fig. 2 is a schematic structural diagram of a control unit according to an embodiment of the present disclosure;

fig. 3 is a schematic water path diagram of a water purifying apparatus according to a second embodiment of the present application;

fig. 4 is a flow chart of a control method of a water purifying apparatus according to a first embodiment of the present application;

reference numerals:

1-a water purifying device; 10-a water purifying unit; 110-a booster pump; 120-RO filter core; 130-a pressure relief valve; 20-a water mixing unit; 210-a cold water pump; 220-a heating unit; 230-a blending area; 310-a hot water outlet unit; 320-a cold water outlet unit; 330-a wastewater outlet unit; 40-a return waterway; 410-a return valve; 50-a water inlet unit; 510-a water inlet; 520-PP cotton; 530-inlet valve; 610-a temperature sensor; 70-a control unit; 71-bus; 72-a processor; 73-memory.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

Referring to fig. 1, a water path schematic diagram of a water purifying apparatus 1 according to a first embodiment of the present disclosure is shown. Fig. 2 is a schematic structural diagram of a control unit 70 according to an embodiment of the disclosure. Fig. 3 is a schematic water path diagram of a water purifying apparatus 1 according to a second embodiment of the present disclosure.

In an embodiment, as shown in fig. 1, a water purifying unit 10, a water mixing unit 20 and a water outlet unit are arranged in the water purifying device 1, the water purifying unit 10 includes a booster pump 110, the water mixing unit 20 includes a cold water pump 210 and a heating unit 220, the water outlet unit includes a hot water outlet unit 310, the water purifying unit 10, the cold water pump 210, the heating unit 220 and the hot water outlet unit 310 are sequentially connected to form a hot water outlet loop, and a backflow waterway 40 is arranged between a water outlet end of the water purifying unit 10 and a water inlet end of the water purifying unit 10.

In the above description, the water purifying unit 10 has a first water outlet end and a second water outlet end, the first water outlet end is connected to the water inlet end of the water mixing unit 20, and the second water outlet end is connected to the water inlet end of the return waterway 40.

After receiving a hot water taking instruction from a user, the water purifying device 1 can output hot water by using a hot water outlet loop shown in fig. 1, and specifically, the principle of outputting hot water is as follows:

the pure water outputted from the water purifying unit 10 is divided into two parts, one part is returned to the water inlet end of the water purifying unit 10 via the return water path 40, and the other part is supplied to the water mixing unit 20. After the pure water enters the water mixing unit 20, the heating unit 220 in the water mixing unit 20 heats the pure water to a target temperature required by a user, and after the heating is successful, the hot water is output through the hot water outlet unit 310.

In another embodiment, as shown in fig. 3, in this embodiment, a water inlet unit 50, a water purifying unit 10, a water mixing unit 20 and a water outlet unit are disposed in the water purifying apparatus 1, the water inlet unit 50 includes a water inlet 510, PP cotton 520 and a water inlet valve 530, the water purifying unit 10 includes a booster pump 110, an RO filter element 120 and a pressure reducing valve 130, the water mixing unit 20 includes a cold water pump 210, a blending area 230 and a heating unit 220, the water outlet unit includes a hot water outlet unit 310, a cold water outlet unit 320 and a waste water outlet unit 330, the water inlet 510, PP cotton 520, the water inlet valve 530, the booster pump 110, the RO filter element 120, the pressure reducing valve 130, the cold water pump 210, the blending area 230, the heating unit 220 and the hot water outlet unit 310 are sequentially connected to form a hot water outlet circuit, the water inlet 510, PP cotton 520, the booster pump 530, the booster pump 110, the RO filter element 120 and the waste water outlet unit 330 are sequentially connected to form a cold water outlet circuit. A return water path 40 is provided between the water outlet end of the water purifying unit 10 and the water inlet end of the water purifying unit 10, and the return water path 40 includes a return valve 410. The water purifying unit 10 has a first water outlet end and a second water outlet end, wherein the first water outlet end is connected with the water inlet end of the water mixing unit 20, and the second water outlet end is connected with the water inlet end of the return waterway 40.

After receiving a cold water taking instruction from a user, the water purifying device 1 can output cold water by using a cold water outlet loop shown in fig. 3, and specifically, the principle of outputting cold water is as follows:

raw water enters the water purifying unit 10 through the water inlet unit 50, the RO filter core 120 in the water purifying unit 10 filters the raw water to form wastewater and pure water, the wastewater is discharged through the wastewater outlet unit 330, and the pure water is output through the cold water outlet unit 320.

After receiving the instruction of taking hot water from the user, the water purifying device 1 can output hot water by using the hot water outlet loop shown in fig. 3, and specifically, the principle of outputting hot water is as follows:

raw water enters the water purifying unit 10 through the water inlet unit 50, the RO filter core 120 in the water purifying unit 10 filters the raw water to form wastewater and pure water, the wastewater is discharged through the wastewater outlet unit 330, the pure water is divided into two parts, one part flows back to the water inlet end of the water purifying unit 10 through the reflux valve 410, and the other part is conveyed into the water mixing unit 20. After the pure water enters the water mixing unit 20, the heating unit 220 heats the pure water to a target temperature required by a user, and the heated hot water is outputted through the hot water outlet unit 310.

It should be noted that, in fig. 1 and 3, the flow rate of the pure water supplied from the water purifying unit 10 to the water mixing unit 20 is determined by the outlet flow rate of the cold water pump 210, and the flow rate of the return water in the return water path 40 is determined by the outlet flow rate of the water purifying unit 10 and the outlet flow rate of the cold water pump 210; the flow rate of the hot water outputted from the hot water outlet unit 310 is determined by the outlet flow rate of the cold water pump 210. For example, in the theoretical data calculation, if the flow rate of pure water output by the water purifying unit 10 is a and the flow rate of water output by the cold water pump 210 is B, the water purifying unit 10 will deliver pure water with flow rate B to the water mixing unit 20, the flow rate of return water in the return water path 40 is a-B, and the flow rate of hot water output by the hot water outlet unit 310 is B.

In addition, in fig. 3 described above, the sum of the flow rate of the wastewater from the wastewater outlet unit 330 and the flow rate of the pure water from the water purifying unit 10 is equal to the flow rate output of the booster pump 110. The flow rate of pure water discharged from the water purifying unit 10 is equal to the sum of the water outlet flow rate of the cold water pump 210 and the flow rate of return water in the return water path 40. Based on the above, it can be derived that, in the theoretical data calculation, the sum of the flow rate of the wastewater from the wastewater outlet unit 330, the outlet flow rate of the cold water pump 210, and the flow rate of the return water in the return water path 40 is equal to the flow rate output of the booster pump 110, and the flow rate output of the booster pump 110 is greater than the outlet flow rate of the cold water pump 210. However, the flow rate of the wastewater discharged from the wastewater discharge unit 330 is related to the operation pressure of the booster pump 110, and the booster pump 110 is operated at a different pressure, and the wastewater discharge unit 330 discharges wastewater at a different flow rate. When the flow rate of the wastewater discharged from the wastewater outlet unit 330 is unstable, the flow rate output of the booster pump 110 is not fixedly related to the outlet flow rate of the cold water pump 210.

As can be seen from the above, when hot water is discharged by using the hot water discharge circuit shown in fig. 1 and 3, there is a backflow phenomenon, and the working pressure of the booster pump 110 is increased due to the backflow phenomenon. When the working pressure of the booster pump 110 is higher, the front pressure of the membrane of the filtering part in the water purifying unit can be increased, the power of the whole machine is increased, the cost of the whole machine is increased, the vibration is large when the water purifying unit is used for preparing water, the noise is large, the user experience is influenced, the service life of the filter element is shortened, the filtering efficiency is also reduced, and the use experience of a user is poor. Therefore, the application provides a control method of the water purifying device 1, which is used for controlling the working state of the water purifying device 1 when hot water is discharged, so that the reflux amount of the water purifying device 1 can be effectively reduced while the discharge flow and the discharge water temperature are ensured.

As shown in fig. 2, a control unit 70 may be disposed in the water purifying apparatus 1, and the control unit 70 is used to execute the control method of the water purifying apparatus 1 in the present application. Specifically, as shown in fig. 2, the control unit 70 includes: at least one processor 72 and a memory 73, one processor 72 being exemplified in fig. 2. The processor 72 and the memory 73 are connected via a bus 71, and the memory 73 stores instructions executable by the processor 72, the instructions being executed by the processor 72.

The following explains in detail the operation principle of the control method of the water purification apparatus 1, taking the waterway diagram shown in fig. 3 as an example:

fig. 4 is a flow chart illustrating a control method of the water purifying apparatus 1 according to the first embodiment of the present application. As shown in fig. 4, the method includes the following steps S210 to S230.

Step S210: pre-conditioning stage: and receiving a water taking instruction of a user, detecting and acquiring the real-time flow S1 of the cold water pump, and adjusting the flow output of the booster pump according to the comparison result of the real-time flow S1 and a preset flow threshold S0.

The water taking instruction includes a target temperature T0 of hot water required by a user, and the real-time flow S1 is a real-time water outlet flow of the water outlet end of the cold water pump 210 in the water making and water outlet process; the preset flow threshold S0 is the maximum outlet flow of the cold water pump 210; the flow output of the booster pump 110 may be the duty cycle size of the booster pump 110 or the flow size of the water outlet end of the booster pump 110.

Specifically, the method for acquiring the preset flow threshold S0 is as follows: after the water purification device is electrified, the cold water pump and the booster pump are started with rated voltage, when the cold water pump continuously works for a preset period of time, the current flow output of the cold water pump is recorded as a preset flow threshold S0 and used for adjusting the flow output of the booster pump, and the maximum water outlet flow of the cold water pump 210 is obtained by driving the cold water pump 210 with the rated voltage, wherein the preset period of time is a fixed value preset in the control unit 70, the specific size is determined according to actual conditions, and the method is not limited in the application.

In this step, when the user needs to take hot water, a water taking instruction may be sent to the control unit 70. Illustratively, the water purifying apparatus 1 may be provided with a water intake button, and the user may send a water intake instruction to the control unit 70 by triggering the water intake button. Wherein, the water taking button can be a hardware button or a software button. For example, the water purifying apparatus 1 may be network-connected to a mobile terminal used by a user, who may transmit a water taking instruction to the control unit 70 through the mobile terminal.

After receiving the water intake command, the control unit 70 controls the flow output of the booster pump 110 by detecting the real-time flow S1 of the cold water pump 210 and comparing the real-time flow with the preset flow threshold S0. After the flow output of the booster pump 110 is stabilized, the control unit 70 may continue to execute step S220 described below.

Step S220: and (3) a temperature adjusting stage: the power output of the heating unit 220 and/or the flow output of the cold water pump 210 are/is adjusted so that the actual water outlet temperature T1 of the water mixing unit reaches the target temperature T0 indicated by the water taking instruction.

In this step, after receiving the water intake command, the control unit 70 can analyze the target temperature T0 of the hot water required by the user from the water intake command. After the analysis is successful, the control unit 70 can adjust the actual water outlet temperature T1 of the water mixing unit, specifically, the actual water outlet temperature T1 is controlled by adjusting the power output of the heating unit 220 and/or the flow output of the cold water pump 210, and when the actual water outlet temperature reaches the target temperature T0 of the hot water required by the user, the control unit 70 can stop adjusting the actual water outlet temperature T1. After the adjustment is stopped, the control unit 70 may continue to perform step S230 described below. After stopping the adjustment, the hot water outlet circuit outputs hot water having a target temperature T0, and the return water path 40 returns surplus pure water outputted from the water purifying unit 10.

Step S230: reflux regulation stage: and regulating the flow output of the booster pump according to the current actual water outlet temperature T1, and when the actual water outlet temperature T0 reaches the target temperature T0 again, maintaining the flow output of the booster pump until the user stops taking water.

In this step, the control unit 70 can adjust the flow rate output of the booster pump 110, and since the water outlet flow rate of the water purifying unit 10 is determined by the flow rate output of the booster pump 110, the water outlet flow rate of the water purifying unit 10 also changes when the control unit 70 adjusts the flow rate output of the booster pump 110. When the water outlet flow rate of the water purifying unit 10 changes, the flow rate of the pure water flowing into the return water path 40 and the water mixing unit 20 also changes, and thus the actual water outlet temperature T1 of the water mixing unit also changes. Therefore, in this step, when the control unit 70 adjusts the flow output of the booster pump 110, specifically, adjusts the flow output of the booster pump in a manner of gradually decreasing and then gradually increasing, the change condition of the actual outlet water temperature T1 can be monitored in real time during the adjustment, and the flow condition of the pure water in the return water path 40 and the water mixing unit 20 can be reversely pushed according to the change condition of the actual outlet water temperature T1. When the control unit 70 monitors that the actual water outlet temperature T1 is stabilized at the target temperature T0 again, it can be presumed that the water return flow in the water return channel 40 is less or the water return flow in the water return channel 40 is almost not generated, meanwhile, the flow rate of the pure water in the water mixing unit 20 is larger, and the water taking requirement of the user can be met, at this moment, the control unit 70 can stop adjusting the flow output of the booster pump 110, and after stopping adjusting, the booster pump 110 is controlled to always keep the current water outlet flow rate and water outlet; when the user stops taking water, the control unit 70 may control the booster pump 110 to stop water outlet while controlling the water purifying apparatus 1 to stop working, or control the water purifying apparatus 1 to be in a standby state.

From the above, it can be seen that when the water purification apparatus 1 is controlled to output hot water according to the method in the present application, the amount of backflow water in the backflow waterway 40 can be reduced to the maximum extent under the condition that the output water temperature and the output water flow rate are ensured. By reducing the amount of backflow water in the backflow waterway 40, the pressure in front of the RO filter element 120 in the water purifying unit 10 is reduced, the power of the whole machine is reduced, the cost of the whole machine is reduced compared with the prior art, the vibration is obviously reduced when the water purifying unit 10 is used for preparing water, the noise during use is reduced, meanwhile, the service life of the R0 filter element 120 is prolonged, the filtering efficiency is improved, and the use feeling of a user is improved.

In addition, when the backflow water in the backflow waterway 40 is large, the operation power of the booster pump 110 is also increased, and the operation efficiency of the water purifying apparatus 1 is low when the operation power of the booster pump 110 is increased. By controlling the water purifying apparatus 1 to output hot water by using the method in the present application, the working efficiency of the water purifying apparatus 1 can be improved while the operation power of the booster pump 110 is reduced.

In an embodiment, the control unit 70 executes the step S210, and adjusts the flow output of the booster pump according to the comparison result of the real-time flow S1 and the preset flow threshold S0, including:

step S310: gradually reducing the flow output of the booster pump until the difference between the real-time flow S1 and the preset flow threshold S0 accords with a preset range, and recording the current flow of the booster pump as the reference flow S.

In the step S310, the maximum output of the cold water pump is started by normally starting the booster pump, and the flow output of the cold water pump is gradually reduced, so as to obtain the lowest flow output of the booster pump meeting the maximum output of the cold water pump, specifically, whether the booster pump meets the requirement is determined by judging the difference between the real-time flow S1 of the cold water pump and the preset flow threshold S0 (i.e., the maximum flow output of the cold water pump), in this embodiment, the preset range of the difference may be set to 5ml/min-10ml/min, and meanwhile, the control of the booster pump may also be stopped by continuously comparing the magnitudes of the real-time flow S1 and the preset flow threshold S0, where the flow output of the booster pump is gradually reduced, when the real-time flow S1 is just smaller than the preset flow threshold S0.

As can be seen from the above, when the booster pump 110 discharges water according to the reference flow rate S, the cold water pump 210 can discharge water approximately according to the preset flow rate threshold S0; meanwhile, when the booster pump 110 discharges water according to the reference flow S and the cold water pump 210 discharges water according to the preset flow threshold S0, there is almost no backflow water in the backflow waterway 40, and pure water outputted from the water purifying unit 10 may all enter the water mixing unit 20. In addition, it can be also known that when the booster pump 110 discharges water at the reference flow rate S, the cold water pump 210 can discharge water at an arbitrary flow rate, and the reference flow rate S is the minimum flow rate at which the cold water pump 210 can discharge water at an arbitrary flow rate.

Step S311: gradually increasing the flow output of the booster pump until the flow multiple between the current water outlet flow S2 of the booster pump and the reference flow S is equal to a preset regulating coefficient.

In the step S311, before the instant heating water outlet is performed, the outlet water flow and the outlet water temperature are not stable, the booster pump needs to be set to be greater than the maximum flow of the cold water pump, otherwise, in the process of adjusting the flow of the cold water pump, the problem that the air injection is too high due to insufficient water supply of the booster pump, the control of the cold water pump is affected, and the like may possibly occur, so a certain margin needs to be left for the booster pump in the pre-adjusting stage.

In this embodiment, the water flow S2 is determined by a multiple relation with the reference flow S, specifically, an adjustment coefficient is set, and the specific value of the reference flow S obtained through the foregoing steps is multiplied and obtained, where the adjustment coefficient is a constant greater than or equal to 1, and in this embodiment, the adjustment coefficient may be 1.3, so that the booster pump leaves 30% of the allowance, so as to meet the water supply requirement.

As can be appreciated from the above-described step S311, when the booster pump 110 is in accordance with the reference flow S, the cold water pump 210 can discharge water at an arbitrary flow rate. Since the outlet flow rate S2 of the booster pump is greater than the reference flow rate S, the cold water pump 210 can also output water at an arbitrary flow rate when the booster pump 110 outputs water at the outlet flow rate S2.

In the above step S311 and step S312, further including: when the difference value between the real-time flow S1 and the preset flow threshold S0 accords with a preset range, recording the current duty ratio of the booster pump as a reference duty ratio P0; when the flow multiple between the current water outlet flow S2 and the reference flow S of the booster pump is equal to a preset regulating coefficient, the current duty ratio of the booster pump is recorded as an initial duty ratio P1, and the reference duty ratio P0 and the initial duty ratio P1 which are set by the allowance are recorded when the maximum output of the cold water pump is met by the booster pump, so that a user can directly take the reference duty ratio P0 and the initial duty ratio P1 as starting conditions of the booster pump when using the water purifying equipment 1 subsequently, redundant steps are omitted, the control process of the booster pump is reduced, the water outlet speed is accelerated, and the energy consumption is reduced.

In an embodiment, the control unit 70 may adjust the actual water outlet temperature T1 of the water mixing unit 20 by adjusting the operation parameters of the heating unit 220 or the cold water pump 210. The control unit 70 may adjust the operation parameters of the heating unit 220 or the cold water pump 210 by means of temperature adjustment. Before the operation parameters of the heating unit 220 or the cold water pump 210 are adjusted by the temperature adjustment method, the control unit 70 first determines the temperature adjustment method, and the specific principle will be explained in detail as follows:

Step S411: in the temperature adjustment stage, the theoretical outlet water flow S3 of the cold water pump 210 is calculated according to the target temperature T0, the inlet water temperature T2, and the rated heating power P of the heating unit 220.

The water inlet temperature T2 is the temperature of the water outlet of the cold water pump, i.e. the temperature of the water inlet of the heating unit 220; the theoretical water outlet flow S3 is the water outlet flow that the cold water pump 210 is required to reach when the actual water outlet temperature T1 of the water mixing unit 20 is equal to the target temperature T0 and the heating unit 220 is operated at the rated heating power P.

In this step, the control unit 70 may measure the outlet water temperature of the cold water pump 210 as the inlet water temperature T2 of the heating unit through the temperature sensor 610 in the blending area 230. After obtaining the inlet water temperature T2, the control unit 70 can determine the temperature adjustment mode according to the target temperature T0 of the hot water required by the user, the inlet water temperature T2 and the rated heating power P of the heating unit 220. When determining the temperature adjustment mode, the control unit 70 may first calculate the water outlet flow rate that the cold water pump 210 theoretically needs to achieve when the actual water outlet temperature T1 of the water mixing unit 20 reaches the target temperature T0, that is, first calculate the theoretical water outlet flow rate S3 of the cold water pump 210. Specifically, the control unit 70 may bring the target temperature T0, the inlet water temperature T2, and the rated heating power P of the heating unit 220 into the following formula (1), and after the bringing is successful, the theoretical outlet water flow S3 may be successfully calculated. After the calculation is successful, the control unit 70 may continue to execute step S412 described below.

Wherein c in the formula (1) is the specific heat capacity, and S is the theoretical water outlet flow S3 of the cold water pump 210.

Notably, c is the specific heat capacity of water; the above equation (1) is derived from the following equations (2) to (4), and the equation (1) can be obtained by performing the equation operation on the equation (2) and the equation (3) and simultaneously introducing the equation (3) into the equation (1).

Q＝cm(T0-T2) (2)

Q＝ηPt (3)

m＝Sρt (4)

Wherein Q is energy, m is mass, t is time, S is flow rate, ρ is density, and η is heating efficiency; in this example, ρ=1 g/ml, and heating efficiency η=1.

Step S412: and determining a temperature regulation mode according to the theoretical water outlet flow S3 of the cold water pump and a preset flow threshold S0, and regulating the power output of the heating unit and/or the flow output of the cold water pump.

Specifically, after successfully calculating the theoretical water outlet flow S3, the control unit 70 may compare the theoretical water outlet flow S3 with a preset flow threshold S0 that can be reached by the cold water pump 210; if the comparison result shows that the theoretical water outlet flow S3 is greater than or equal to the preset flow threshold S0, which indicates that the deviation between the target temperature T0 and the inlet water temperature T2 is smaller, the temperature adjustment mode can be determined to control the cold water pump 210 to maximize the water outlet flow S _max And (3) discharging water, and adjusting the heating power of the heating unit 220 according to the magnitude relation between the actual water discharging temperature T1 and the target temperature T0. If the comparison result shows that the theoretical water outlet flow S3 is smaller than the preset flow threshold S0, which indicates that the deviation between the target temperature T0 and the inlet temperature T2 is larger, the temperature adjustment mode can be determined to control the heating unit 220 to operate at the rated heating power P, and meanwhile, the water outlet flow of the cold water pump 210 is adjusted according to the magnitude relation between the actual water outlet temperature T1 and the target temperature T0.

In a specific implementation manner of this embodiment, the specific adjustment manners of the water outlet flow of the cold water pump 210 and the heating power of the heating unit 220 are: detecting the actual water outlet temperature T1 of the water mixing unit, and when the actual water outlet temperature T1 is larger than the target temperature T0, reducing the heating power of the heating unit or increasing the real-time flow S1 of the cold water pump; when the actual water outlet temperature T1 is smaller than the target temperature T0, the heating power of the heating unit is increased or the real-time flow S1 of the cold water pump is reduced.

After the temperature adjustment mode is determined, the control unit 70 may adjust the actual outlet water temperature T1 of the water mixing unit 20 according to the temperature adjustment mode. When the actual outlet temperature T1 is stabilized at the target temperature T0 and the actual outlet flow of the hot water outlet circuit tends to be stabilized, the control unit 70 may stop adjusting the actual outlet temperature T1.

According to the adjusting method in the embodiment, when the actual water outlet temperature T1 of the water mixing unit 20 is adjusted, the water outlet flow of the hot water outlet loop can be maximized when the actual water outlet temperature T1 is ensured to reach the target temperature T0, and the water taking experience of a user is improved.

In one embodiment, the control unit 70 adjusts the flow output of the booster pump 110 in such a way that the flow output is gradually reduced and then gradually increased, that is, when the actual outlet water temperature T1 is stabilized at the target temperature T0, the flow output of the booster pump is gradually reduced, and the actual outlet water temperature T1 is maintained.

Specifically, when the flow rate output of the booster pump 110 is initially reduced, the flow rate of the return water flowing into the return water path 40 is gradually reduced, and the flow rate of the pure water flowing into the water mixing unit 20 is not changed; when the flow rate of the pure water flowing into the water mixing unit 20 is not changed, the actual water outlet temperature T1 of the water mixing unit 220 is not changed and is still set to the target temperature T0. After the water flow rate of the booster pump 110 is lowered for a while, almost no return water flows in the return water path 40, and the flow rate of pure water flowing into the water mixing unit 20 gradually decreases.

In this embodiment, the method further includes continuously detecting the actual outlet water temperature T1, obtaining a comparison result of the actual outlet water temperature T1 and the target temperature T0, determining whether to stop a control process of gradually reducing the flow output of the booster pump and whether to start gradually increasing the flow output of the booster pump according to the comparison result, and determining the final flow output of the booster pump, where the final duty ratio P3 represents the flow output, and when the control unit 70 does not receive other instructions, driving the booster pump with the final duty ratio P3 until the water taking is stopped.

In the above, when the flow rate of the pure water flowing into the water mixing unit 20 is reduced to a certain value due to the continuous reduction of the flow rate output of the booster pump 110, the actual outlet water temperature T1 may be higher than the target temperature T0. When the actual water outlet temperature of the water mixing unit is higher than the target temperature T0, the control unit 70 may gradually increase the flow output of the booster pump 110, and as the water outlet flow of the booster pump 110 increases, the pure water flow into the water mixing unit 20 also gradually increases. After the flow rate of the pure water flowing into the water mixing unit 20 increases, the actual outlet water temperature of the water mixing unit gradually decreases, and when the actual outlet water temperature of the water mixing unit just decreases to the target temperature T0, that is, the actual outlet water temperature T1 reaches the target temperature T0 again, the flow rate output of the booster pump 110 stops increasing. After stopping increasing, the booster pump 110 is controlled to continuously output water according to the current water output flow until the user stops taking water.

It should be noted that, in the present application, before the control unit 70 adjusts the flow output of the booster pump 110, the actual outlet water temperature of the water mixing unit has stabilized at the target temperature T0, and the actual outlet water flow of the hot water outlet circuit and the cold water pump 210 has stabilized at the preset flow threshold S0. When the flow output of the booster pump 110 is adjusted, if the actual water outlet flow of the cold water pump 210 is smaller than the preset flow threshold S0, which indicates that the booster pump 110 cannot meet the flow required by the cold water pump 210, the actual water outlet temperature T1 of the water mixing unit will be higher than the target temperature T0 at this time; if the actual water output of the cold water pump 210 is equal to the preset flow threshold S0, which indicates that the booster pump 110 can meet the required flow of the cold water pump 210, the actual water output temperature T1 of the water mixing unit will be equal to the target temperature T0.

In this embodiment, when the flow rate of the booster pump 110 is stopped, there is little or no backflow water in the backflow waterway 40, and the actual outlet water temperature T1 and the actual outlet water flow rate of the water mixing unit 20 can meet the water intake requirement of the user. From this, it makes booster pump 110 according to minimum flow operation to realize in this application through adjusting, when satisfying the user water intaking demand, reduced the membrane front pressure of RO filter core in water purification unit 10, reduced complete machine power and cost, and vibration obviously reduces when water purification unit 10 system water, noise when having reduced the use, and the life and the filtration efficiency of RO filter core increase simultaneously, have promoted user's use impression.

In a specific implementation manner of this embodiment, when the booster pump is adjusted, if the actual outlet water temperature T1 is detected to be equal to the target temperature T0 during the process of gradually increasing the flow output, the flow output of the booster pump is controlled in a manner of gradually decreasing and then gradually increasing, and the booster pump is controlled in such a cyclic adjustment manner, so that the outlet water flow and the outlet water temperature are met, and meanwhile, the flow output of the booster pump is reduced to the greatest extent, so that the adjustment result is more accurate, or in another implementation manner, the temperature difference between the actual outlet water temperature T1 and the target temperature T0 is detected to be within a certain range, for example ±1 ℃, that is, the actual outlet water temperature T1 is approximately equal to the target temperature, at this time, the outlet water flow and the outlet water temperature are approximately equal to the requirements of users, and the adjustment process of the booster pump can be completed only through single control, so that the working time of the whole machine is shortened, and the speed of single water production outlet is accelerated.

In the above-mentioned booster pump adjusting process, when the actual water outlet temperature T1 is maintained at the target temperature T0, the current duty ratio of the booster pump 110 may be recorded as the final duty ratio P3, and used for driving the booster pump 110 and correlating with the target temperature T0, where the correlation may be used for next water taking of the user, and when the user selects the target temperature T0 same as the current water taking as the water outlet temperature, the duty ratio may be directly used as the flow output of the booster pump 100, so that other steps are omitted, and only the flow output of the cold water pump 210 and the heating power of the heating unit 220 need to be adjusted.

In one embodiment, the control unit 70 may reduce the flow output of the booster pump 110 by reducing the rotational speed of the booster pump 110; the control unit 70 may increase the flow output of the booster pump 110 by increasing the rotational speed of the booster pump 110, and the specific control unit 70 controls the rotational speed of the booster pump 110 mainly by transmitting a driving signal to the booster pump 110. When it is necessary to reduce the rotation speed of the booster pump 110, the control unit 70 may reduce the duty ratio of the driving signal. When it is necessary to increase the rotation speed of the booster pump 110, the control unit 70 may increase the duty ratio of the driving signal.

In the several embodiments provided in the present application, the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, for example, flow diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

In addition, the functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored on a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, randomAccess Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes. The Memory 73 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as static random access Memory (Static RandomAccess Memory, SRAM), electrically erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), programmable Read-Only Memory (PROM), read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.

Claims

1. The control method of the water purifying equipment comprises the steps that a water purifying unit, a water mixing unit and a water outlet unit are arranged in the water purifying equipment, the water mixing unit comprises a cold water pump and a heating unit, the water purifying unit comprises a booster pump, and a backflow waterway is arranged between the water outlet end of the water purifying unit and the water inlet end of the water purifying unit;

the control method of the water purifying equipment is characterized by comprising the following steps:

2. The control method of a water purification apparatus according to claim 1, wherein adjusting the flow output of the booster pump according to a comparison result of the real-time flow S1 and a preset flow threshold S0 comprises:

3. The control method of a water purification apparatus according to claim 2, wherein when a difference between the real-time flow S1 and a preset flow threshold S0 meets a preset range, recording a current duty ratio of the booster pump as a reference duty ratio P0; when the flow multiple between the current water outlet flow S2 and the reference flow S of the booster pump is equal to a preset regulating coefficient, recording the current duty ratio of the booster pump as an initial duty ratio P1.

4. A control method of a water purification apparatus according to claims 1-3, wherein the method for obtaining the preset flow threshold S0 is:

5. The method for controlling a water purification apparatus according to claim 1, wherein,

in the temperature regulation stage, calculating a theoretical water outlet flow S3 of the cold water pump according to the target temperature T0, the water inlet temperature T2 and the rated heating power P of the heating unit;

and determining a temperature regulation mode according to the theoretical outlet water flow S3 of the cold water pump and the preset flow threshold S0, and regulating the power output of the heating unit and/or the flow output of the cold water pump.

6. The method according to claim 5, wherein determining a temperature adjustment mode according to the theoretical outlet water flow S3 of the cold water pump and the preset flow threshold S0 comprises:

7. The method according to claim 6, wherein the temperature adjustment mode specifically includes:

8. The control method of a water purification apparatus according to claim 1, wherein adjusting the flow output of the booster pump in a stepwise decreasing-then-stepwise increasing manner according to the current actual outlet water temperature T1, comprises:

9. The control method of a water purification apparatus according to claim 8, wherein in the step of adjusting the booster pump, if the actual outlet water temperature T1 is detected to be equal to the target temperature T0 during the step of increasing the flow output, the flow output of the booster pump is controlled again in a manner of decreasing step by step and then increasing step by step, and is controlled in a manner of circulating adjustment.

10. The control method of a water purification apparatus according to claim 8 or 9, wherein when an actual outlet water temperature T1 is maintained at the target temperature T0, a current duty cycle of the booster pump is recorded as a final duty cycle P3, and is associated with the target temperature T0.