CN114084919A - Control method and water purifier - Google Patents

Control method and water purifier Download PDF

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Publication number
CN114084919A
CN114084919A CN202111355935.8A CN202111355935A CN114084919A CN 114084919 A CN114084919 A CN 114084919A CN 202111355935 A CN202111355935 A CN 202111355935A CN 114084919 A CN114084919 A CN 114084919A
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CN
China
Prior art keywords
water
pure water
water tank
pure
filter element
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Pending
Application number
CN202111355935.8A
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Chinese (zh)
Inventor
郭建刚
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Guangdong Mofei Technology Co ltd
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Guangdong Mofei Technology Co ltd
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Priority to CN202111355935.8A priority Critical patent/CN114084919A/en
Publication of CN114084919A publication Critical patent/CN114084919A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/003—Processes for the treatment of water whereby the filtration technique is of importance using household-type filters for producing potable water, e.g. pitchers, bottles, faucet mounted devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
    • B01D29/605—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by level measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
    • B01D29/608—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by temperature measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/157—Flow control valves: Damping or calibrated passages
    • B01D35/1573—Flow control valves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C02F2103/04—Non-contaminated water, e.g. for industrial water supply for obtaining ultra-pure water
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/42—Liquid level
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/10—Location of water treatment or water treatment device as part of a potable water dispenser, e.g. for use in homes or offices

Abstract

The embodiment of the invention provides a control method and a water purifier, wherein the method comprises the following steps: detecting the liquid level of a pure water tank for storing pure water; when the liquid level of the pure water tank is lower than a first liquid level threshold value, conveying raw water stored in a raw water tank to a filter element for pure water preparation, and conveying the prepared pure water to a pure water tank; and when the liquid level of the pure water tank reaches a second liquid level threshold value, stopping pure water preparation, conveying the pure water in the pure water tank to the filter element by using a cleaning pipeline so as to clean the filter element, and discharging the cleaning water of the filter element to the raw water tank by using a waste water pipeline. The method can avoid TDS from remaining in the filter element and the pipeline, and further avoid overhigh concentration of the TDS in the prepared pure water.

Description

Control method and water purifier
Technical Field
The embodiment of the invention relates to the technical field of household appliances, in particular to a control method and a water purifier.
Background
Along with the increasing concern about drinking water safety of people, the application of purifier is also more and more extensive. The water purifier can effectively ensure the safety of drinking water to a certain extent by carrying out depth filtration and purification treatment on water. If the application publication number is: CN106186120A, the present invention discloses a wastewater treatment system for water purifiers and a wastewater treatment control method for water purifiers, wherein the wastewater treatment system for water purifiers comprises a main machine of a water purifier, a purified water output device, a wastewater collection device and a water level detector.
The existing water purifiers are generally equipped with a pure water tank, source water is filtered and stored in the pure water tank, and when a user takes water, the user supplies water to the user through the pure water tank. Such water supply mode leads to, if the user does not get water for a long time, the bacterium is bred easily to the pure water in the pure water tank, also leads to the Total Dissolved Solids (TDS) concentration too high in the pure water because of the salinity of pipeline, valve body or internal deposit dissolves easily, and then threatens user's drinking water safety.
Disclosure of Invention
In view of the above problems in the prior art, embodiments of the present invention provide a control method and a water purifier, which can avoid the technical problem of high TDS concentration of pure water due to long-time storage.
In order to solve the above problems, the embodiment of the present invention provides the following technical solutions:
an embodiment of the present invention provides a control method for controlling a water purifier, including:
detecting the liquid level of a pure water tank for storing pure water;
when the liquid level of the pure water tank is lower than a first liquid level threshold value, conveying raw water stored in a raw water tank to a filter element for pure water preparation, and conveying the prepared pure water to a pure water tank;
and when the liquid level of the pure water tank reaches a second liquid level threshold value, stopping pure water preparation, conveying the pure water in the pure water tank to the filter element by using a cleaning pipeline so as to clean the filter element, and discharging the cleaning water of the filter element to the raw water tank by using a waste water pipeline.
The method can avoid TDS from remaining in the filter element and the pipeline, and further avoid overhigh concentration of the TDS in the prepared pure water.
In some embodiments, the method further comprises:
and when the water purifier is in a standby state and reaches a first time threshold value, discharging the pure water stored in the pure water tank to the filter element by using the cleaning pipeline, and discharging the pure water to the raw water tank through the waste water pipeline.
So, can avoid the long-time storage of pure water to breed the bacterium, be of value to guarantee user's drinking water safety.
In some embodiments, the raw water tank is connected to the filter element by a first water pump; the raw water stored in the raw water tank is conveyed to the filter element for pure water preparation, and the prepared pure water is conveyed to the pure water tank, and the method comprises the following steps:
and the raw water stored in the raw water tank is conveyed to the filter element through the first water pump to prepare pure water, and the prepared pure water is conveyed to the pure water tank.
In some embodiments, the water purifier further comprises a reversing valve and a second water pump connected between the water outlet of the pure water tank and the reversing valve, and the cleaning pipeline is respectively connected with the reversing valve and the first water pump;
the pure water in the pure water tank is conveyed to the filter element by using a cleaning pipeline so as to wash the filter element, and the pure water cleaning device comprises:
adjusting the reversing valve to communicate the first water pump and the second water pump with the cleaning pipeline through the reversing valve;
and the pure water in the pure water tank is conveyed to the filter element through the first water pump and the second water pump, and the filter element is flushed by the pure water.
In some embodiments, a first water valve is disposed on the waste conduit; the discharging of the washing water of the filter cartridge to the raw water tank using the waste water line includes:
opening the first water valve to communicate the filter element and the raw water tank through the waste water pipeline;
and conveying the flushing water of the filter element to the raw water tank through the waste water pipeline.
The invention provides a water purifier, which comprises a raw water tank, a first water pump, a filter element, a pure water tank, a second water pump, a reversing valve, a first water valve, a first liquid level sensor and a controller, wherein the raw water tank, the first water pump, the filter element, the pure water tank, the second water pump and the reversing valve are sequentially connected, the reversing valve is connected with a water inlet of the first water pump through a cleaning pipeline, a wastewater outlet of the filter element is connected with the raw water tank through a wastewater pipeline, the first water valve is arranged on the wastewater pipeline, and the controller is respectively connected with the first water pump, the second water pump, the reversing valve, the first water valve and the first liquid level sensor;
the first liquid level sensor is used for detecting the liquid level of the pure water tank;
the controller is configured to:
when the liquid level of the pure water tank is lower than a first liquid level threshold value, driving the first water pump to convey raw water stored in the raw water tank to the filter element for pure water preparation, and conveying the prepared pure water to the pure water tank;
when the liquid level of pure water case reaches the second liquid level threshold value, adjust the switching-over valve, through wash the pipeline intercommunication the second water pump with first water pump orders about first water pump with second water pump will pure water in the pure water case is carried extremely the filter core, right the filter core is washed, opens first water valve, through waste water pipeline intercommunication the filter core with former water tank stops the pure water preparation, through waste water pipeline will the sparge water of filter core discharges extremely former water tank.
This purifier can avoid TDS deposit in filter core and pipeline, and then can avoid the too high problem of TDS concentration in the pure water of preparing.
In some embodiments, the controller is further configured to:
when the water purifier is in a standby state and reaches a first time threshold value, the reversing valve is adjusted, the cleaning pipeline is communicated with the second water pump and the first water pump, the first water valve is opened, the waste water pipeline is communicated with the filter element and the raw water tank, the first water pump and the second water pump are opened, pure water stored in the pure water tank is discharged to the filter element through the cleaning pipeline, and pure water is discharged to the raw water tank through the waste water pipeline.
So, can avoid the long-time storage of pure water to breed the bacterium, be of value to guarantee user's drinking water safety.
In some embodiments, the water purifier further comprises a heater and a second water valve, the heater is connected between the reversing valve and the second water valve, and the heater and the second water valve are both connected with the controller;
the controller is further configured to:
when a water taking instruction is received, the reversing valve is adjusted to communicate the second water pump and the heater, the second water pump, the heater and the second water valve are started, pure water in the pure water tank is conveyed to the heater through the second water pump to be heated, and water is supplied through the second water valve.
In some embodiments, the water outlet of the heater is also connected with the pure water tank through a return pipeline; the water purifier also comprises a first temperature sensor connected with the controller, and the first temperature sensor is used for detecting the water temperature of the pure water in the pure water tank;
the controller is further configured to:
when the temperature of the pure water in the pure water tank is lower than a first temperature threshold value, adjusting the reversing valve to communicate the second water pump with the heater;
and starting the second water pump and the heater, conveying the pure water in the pure water tank to the heater through the second water pump for preheating, and refluxing the preheated pure water into the pure water tank through a reflux pipeline.
So, can enough realize preheating the purpose of pure water, be of value to improving water supply flow, utilize the heater to preheat the pure water moreover to utilize the water of pure water case storage after preheating, the structure is comparatively simple, is of value to the manufacturing cost who reduces the purifier.
In some embodiments, the water purifier further comprises a second temperature sensor connected to the controller, the second temperature sensor being configured to detect an outlet water temperature of the heater; the controller is specifically configured to:
when a water taking instruction is received, adjusting the reversing valve to communicate the second water pump with the heater;
starting the second water pump and the heater, and conveying the preheated pure water in the pure water tank to the heater through the second water pump for heating;
and when the water outlet temperature of the heater reaches a second temperature threshold value, the second water valve is opened to supply water. Thus, the supply water temperature can be accurately controlled.
The control method provided by the embodiment of the invention is used for controlling the water purifier, when the pure water tank is lack of water, raw water in the raw water tank is conveyed to the filter element to prepare pure water, the prepared pure water is supplemented to the pure water tank, when the pure water supplement in the pure water tank is completed, the preparation of the pure water is stopped, the pure water in the raw water tank is extracted to flush the filter element so as to remove TDS in the filter element, so that the TDS can be prevented from remaining in the filter element and a pipeline, and the problem of overhigh TDS concentration in the prepared pure water is avoided.
Drawings
Fig. 1 is a flowchart of a first embodiment of a control method according to an embodiment of the present invention;
FIG. 2 is a flowchart of a second embodiment of a control method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a water path of the water purifier according to the embodiment of the invention.
Description of reference numerals:
11-a raw water tank; 12-a first water pump; 13-a filter element; 14-a first water valve; 15-pure water tank; 16-a second water pump; 17-a reversing valve; 18-a heater; 19-a second water valve; 20-cleaning the pipeline; 21-a waste water line; 22-return line; 23-first level sensor.
Detailed Description
Various aspects and features of the present application are described herein with reference to the drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
The embodiment of the invention provides a control method for controlling a water purifier. Referring to fig. 1 and fig. 3, a control method according to an embodiment of the present invention may specifically include the following steps:
s101, the liquid level of the pure water tank 15 for storing pure water is detected.
Wherein the pure water tank 15 is used to store the prepared pure water. Optionally, the water purifier may be provided with a first liquid level sensor 23, and the first liquid level sensor 23 may be disposed in the pure water tank 15 for detecting the liquid level of the pure water tank 15.
And S102, when the liquid level of the pure water tank 15 is lower than the first liquid level threshold value, conveying the raw water stored in the raw water tank 11 to the filter element 13 for pure water preparation, and conveying the prepared pure water to the pure water tank 15.
The first liquid level threshold may be a preset low liquid level threshold of the pure water tank 15, and when the liquid level in the pure water tank 15 is lower than the first liquid level threshold, it indicates that the pure water tank 15 is lack of water and pure water needs to be supplemented. The first level sensor 23 may continuously send a first level signal to the controller, and the controller may determine whether the level of the purified water tank 15 is below a first level threshold. The first level sensor 23 may also send a first level signal to the controller when the liquid level in the pure water tank 15 is below a first liquid level threshold, so that the controller knows that the pure water tank 15 is out of water.
When the controller determines that the liquid level of the pure water tank 15 is lower than the first liquid level threshold, the controller may control the liquid delivery device to deliver the raw water stored in the raw water tank 11 to the filter element 13 for filtration to prepare pure water, and the prepared pure water may be supplemented to the pure water tank 15 through the water delivery pipeline.
And S103, stopping pure water preparation when the liquid level of the pure water tank 15 reaches a second liquid level threshold value, conveying pure water in the pure water tank 15 to the filter element 13 by using a cleaning pipeline 20 to flush the filter element 13, and discharging the flushing water of the filter element 13 to the raw water tank 11 by using a waste water pipeline 21.
The second liquid level threshold may be a high liquid level threshold of the pure water tank 15, and when the liquid level in the pure water tank 15 reaches the second liquid level threshold, it indicates that the pure water in the pure water tank 15 has been completely replenished, and at this time, the supply of the raw water from the raw water tank 11 to the filter element 13 is stopped to stop the preparation of the pure water.
Optionally, the first liquid level sensor 23 may continuously detect the liquid level of the pure water tank 15 and continuously send a first liquid level signal to the controller, and when the controller determines that the liquid level of the pure water tank 15 reaches the second liquid level threshold, the liquid delivery device is turned off to stop delivering the raw water to the filter element 13. The first level sensor 23 may also include a first level sensor and a second level sensor, the first level sensor sends a first level signal to the controller when the liquid level of the pure water tank 15 is lower than a first liquid level threshold, and the second level sensor sends a second level signal to the controller when the liquid level of the pure water tank 15 reaches a second liquid level threshold.
The cleaning line 20 may be connected between the outlet of the pure water tank 15 and the inlet of the filter element 13, and the waste water line 21 may be connected between the waste water outlet of the filter element 13 and the raw water tank 11. For avoiding the TDS of filter core 13 in preparation pure water in-process filtering to pass filtration membrane, permeate pure water one side, initial stage aquatic TDS concentration is too high when leading to next preparation pure water, can stop at every turn after preparing the pure water, the pure water in extraction pure water case 15, carry the pure water to filter core 13 through washing pipeline 20, wash filter core 13, with the TDS in getting rid of filter core 13, the sparge water that forms passes through waste water pipeline and discharges to former water tank 11, thus, can avoid TDS to remain in filter core 13, and then initial stage aquatic TDS concentration is too high when avoiding next preparation pure water.
The control method of the embodiment of the invention is used for controlling the water purifier, when the pure water tank 15 is lack of water, the raw water in the raw water tank 11 is conveyed to the filter element 13 to prepare pure water, the prepared pure water is supplemented to the pure water tank 15, when the pure water supplement in the pure water tank 15 is completed, the preparation of the pure water is stopped, the pure water in the raw water tank 11 is extracted to flush the filter element 13 so as to remove TDS in the filter element 13, therefore, the TDS can be prevented from remaining in the filter element 13 and a pipeline, and the problem of overhigh TDS concentration in the prepared pure water is avoided.
As shown in conjunction with fig. 2, in some embodiments, the method further comprises:
when the standby state of the water purifier reaches a first time threshold, the pure water stored in the pure water tank 15 is discharged to the filter element 13 through the cleaning pipeline 20, and the pure water is discharged to the raw water tank 11 through the waste water pipeline 21.
In specific implementation, the index such as the number of florae in the pure water storage process in the pure water tank 15 can be detected, the longest storage time on the basis of ensuring that the pure water meets the drinking standard is determined, and the longest storage time is used as the first time threshold.
In the use process of the water purifier, the water supplement of the pure water tank 15 is completed, and the water purifier enters a standby state. When a user takes water, the water purifier also enters a standby state. The controller can start timing when determining that the water purifier enters the standby state, and judge whether the timing time reaches a first time threshold value. If the time of the water purifier in the standby state reaches the first time threshold, which indicates that the pure water in the pure water tank 15 may not meet the drinking standard, the pure water in the pure water tank 15 may be discharged to the filter element 13 through the cleaning line 20, and discharged to the raw water tank 11 through the waste water line 21 between the filter element 13 and the raw water tank 11. So, can avoid the long-time storage of pure water to breed the bacterium, be of value to guarantee user's drinking water safety.
In some embodiments, the raw water tank 11 is connected to the filter element 13 by a first water pump 12; step S102 of supplying raw water stored in the raw water tank 11 to the filter element 13 for pure water preparation and supplying the prepared pure water to the pure water tank 15 includes:
the raw water stored in the raw water tank 11 is supplied to the filter element 13 by the first water pump 12 to prepare pure water, and the prepared pure water is supplied to the pure water tank 15.
The first water pump 12 is actually used as a power source of the water purifier, and the first water pump 12 can also be connected with the controller. Optionally, when determining that the liquid level of the pure water tank 15 is lower than the first liquid level threshold, the controller sends a signal to the first water pump 12 to turn on the first water pump 12, so as to deliver the raw water in the raw water tank 11 to the filter element 13 for filtering through the first water pump 12, and deliver the prepared pure water to the pure water tank 15.
In some embodiments, the water purifier further comprises a direction-changing valve 17, and a second water pump 16 connected between the water outlet of the pure water tank 15 and the direction-changing valve 17, the cleaning pipeline 20 is connected to the direction-changing valve 17 and the first water pump 12, respectively, and the waste water pipeline 21 is provided with a first water valve 14.
Step S103, when the liquid level of the pure water tank 15 reaches the second liquid level threshold, stopping pure water preparation, delivering pure water in the pure water tank 15 to the filter element 13 by using the cleaning line 20 to flush the filter element 13, and discharging the flushing water of the filter element 13 to the raw water tank 11 by using the waste water line 21, may include:
opening the first water valve 14 to communicate the filter element 13 and the raw water tank 11 through the waste water pipeline 21, and stopping the preparation of pure water;
adjusting the reversing valve 17 to communicate the first water pump 12 and the second water pump 16 through the reversing valve 17 and the cleaning line 20;
pure water in the pure water tank 15 is supplied to the filter element 13 by the first water pump 12 and the second water pump 16, and the filter element 13 is rinsed with pure water;
the washing water of the filter element 13 is supplied to the raw water tank 11 through the waste water line 21.
When the first water valve 14 is closed, the water delivery from the first water pump 12 to the filter element 13 forms a large pressure in the filter element 13, so that the water passes through the filter membrane in the filter element 13 to prepare pure water, when the first water valve 14 is opened, the waste water outlet of the filter element 13 is opened, and even if the first water pump 12 is opened, the water mainly passes through the waste water outlet and is discharged to the raw water tank 11 through the waste water pipeline 21, the pressure in the filter element 13 is small, so that the water cannot pass through the filter membrane. Therefore, the first water valve 14 is actually opened, and the pure water preparation of the filter element 13 is stopped.
The second water pump 16 is actually used as a power source for supplying water to the user, and is connected to the pure water tank 15 on one side and to the cleaning line 20 and the water supply line for the user through the selector valve 17 on the other side, and the cleaning line 20 is connected to the selector valve 17 and the water inlet of the first water pump 12. When the controller determines that the liquid level of the pure water tank 15 reaches the second liquid level threshold, the first water valve 14 can be opened, the reversing valve 17 is adjusted to enable the reversing valve 17 to be communicated with the clean water pipeline, the first water pump 12 and the second water pump 16 are started, pure water is extracted from the pure water tank 15 to flush the filter element 13 so as to remove TDS in the filter element 13, and formed flushing water can be discharged to the raw water tank 11 through the waste water pipeline 21 to be recycled.
Referring to fig. 3, an embodiment of the present invention further provides a water purifier, which includes a raw water tank 11, a first water pump 12, a filter element 13, a pure water tank 15, a second water pump 16, a reversing valve 17, a first water valve 14, a first liquid level sensor 23, and a controller (not shown), the raw water tank 11, the first water pump 12, the filter element 13, the pure water tank 15, the second water pump 16 and the reversing valve 17 are connected in sequence, the reversing valve 17 is connected with the water inlet of the first water pump 12 through a cleaning pipeline 20, a waste water outlet of the filter element 13 is connected with the raw water tank 11 through a waste water pipeline 21, the first water valve 14 is arranged on the waste water pipeline 21, the controller is respectively connected with the first water pump 12, the second water pump 16, the reversing valve 17, the first water valve 14 and the first liquid level sensor 23.
The first liquid level sensor 23 is used for detecting the liquid level of the pure water tank 15.
The controller is configured to:
when the liquid level of the pure water tank 15 is lower than a first liquid level threshold, driving the first water pump 12 to deliver the raw water stored in the raw water tank 11 to the filter element 13 for pure water preparation, and delivering the prepared pure water to the pure water tank 15;
when the liquid level of the pure water tank 15 reaches the second liquid level threshold value, the change valve 17 is adjusted, the second water pump 16 and the first water pump 12 are communicated through the cleaning pipeline 20, the first water pump 12 and the second water pump 16 are driven to convey pure water in the pure water tank 15 to the filter element 13, the filter element 13 is flushed, the first water valve 14 is opened, the filter element 13 and the raw water tank 11 are communicated through the waste water pipeline 21, preparation of the pure water is stopped, and flushing water of the filter element 13 is discharged to the raw water tank 11 through the waste water pipeline 21.
According to the water purifier disclosed by the embodiment of the invention, when the pure water tank 15 is lack of water, the first water pump 12 is started to convey raw water in the raw water tank 11 to the filter element 13 for pure water preparation, the prepared pure water is supplemented to the pure water tank 15, when the pure water tank 15 is supplemented with water, the first water valve 14 is started to communicate the filter element 13 with the raw water tank 11 through the waste water pipeline 21, the pure water preparation is stopped, the reversing valve 17 is adjusted to communicate the second water pump 16 with the cleaning pipeline 20, the first water pump 12 and the second water pump 16 are started to pump pure water in the pure water tank 15 to flush the filter element 13 so as to remove TDS in the filter element 13, and the formed flushing water is discharged to the raw water tank 11 through the waste water pipeline 21, so that deposition of TDS in the filter element 13 and the pipeline can be avoided, and the problem of overhigh TDS concentration in the prepared pure water can be further avoided.
In some embodiments, the controller is further configured to:
when the standby state of the water purifier reaches a first time threshold value, the reversing valve 17 is adjusted, the second water pump 16 and the first water pump 12 are communicated through the cleaning pipeline 20, the first water valve 14 is opened, the filter element 13 and the raw water tank 11 are communicated through the waste water pipeline 21, the first water pump 12 and the second water pump 16 are opened, pure water stored in the pure water tank 15 is discharged to the filter element 13 through the cleaning pipeline 20, and the pure water is discharged to the raw water tank 11 through the waste water pipeline 21.
In specific implementation, the index such as the number of florae in the pure water storage process in the pure water tank 15 can be detected, the longest storage time on the basis of ensuring that the pure water meets the drinking standard is determined, and the longest storage time is used as the first time threshold.
In the use process of the water purifier, the water supplement of the pure water tank 15 is completed, and the water purifier enters a standby state. When a user takes water, the water purifier also enters a standby state. The controller can start timing when determining that the water purifier enters the standby state, and judge whether the timing time reaches a first time threshold value. If the time of the water purifier in the standby state reaches the first time threshold, which indicates that the pure water in the pure water tank 15 may not meet the drinking standard, the pure water in the pure water tank 15 may be discharged to the filter element 13 through the cleaning line 20, and discharged to the raw water tank 11 through the waste water line 21 between the filter element 13 and the raw water tank 11. So, can avoid the long-time storage of pure water to breed the bacterium, be of value to guarantee user's drinking water safety.
In some embodiments, the water purifier further comprises a heater 18 and a second water valve 19, the heater 18 is connected between the directional valve 17 and the second water valve 19, and both the heater 18 and the second water valve 19 are connected to the controller.
The controller is further configured to:
when a water getting instruction is received, the reversing valve 17 is adjusted to communicate the second water pump 16 and the heater 18, the second water pump 16, the heater 18 and the second water valve 19 are opened, pure water in the pure water tank 15 is conveyed to the heater 18 through the second water pump 16 to be heated, and water is supplied through the second water valve 19.
That is, the water purifier also comprises a pipeline for supplying water to a user, the pipeline is provided with a heater 18 and a second water valve 19, the water outlet of the heat exchanger is connected with the second water valve 19 through the heater 18, and the heater 18 and the second water valve 19 are both electrically connected with the controller.
When a user takes water, a water taking instruction can be sent to the controller through an operation component such as a control panel of the water purifier, when the controller receives the water taking instruction, the reversing valve 17 is adjusted to enable the second water pump 16 to be communicated with the heater 18 through the reversing valve 17, the second water pump 16, the heater 18 and the second water valve 19 are started to start a pipeline for supplying water to the user, the second water pump 16 conveys pure water in the pure water tank 15 to the heater 18 for heating, and the heated water is supplied to the user through the second water valve 19.
In some embodiments, the water outlet of the heater 18 is also connected to the pure water tank 15 through a return line 22; the water purifier further comprises a first temperature sensor connected with the controller, and the first temperature sensor is used for detecting the water temperature of the pure water in the pure water tank 15.
The controller is further configured to:
when the temperature of the pure water in the pure water tank 15 is lower than a first temperature threshold value, adjusting the reversing valve 17 to communicate the second water pump 16 and the heater 18;
the second water pump 16 and the heater 18 are turned on, pure water in the pure water tank 15 is supplied to the heater 18 by the second water pump 16 to be preheated, and the preheated pure water is returned to the pure water tank 15 through the return line 22.
Alternatively, the first temperature sensor may be disposed, for example, between the pure water tank 15 and the first water pump 12, and since the part of the water delivery pipeline is communicated with the pure water tank 15, the temperature value detected by the first temperature sensor is the same as or substantially the same as the temperature of the pure water in the pure water tank 15.
The first temperature sensor can continuously detect the water temperature of the pure water tank 15 and send a first temperature signal to the controller, when the controller determines that the water temperature of the pure water in the pure water tank 15 is lower than a first temperature threshold value, the controller adjusts the reversing valve 17 to communicate the second water pump 16 and the heater 18, turns on the second water pump 16 and the heater 18, keeps the second water valve 19 closed, the second water pump 16 can convey the pure water to the heater 18 for preheating, and the preheated water returns to the pure water tank 15 through the return pipeline 22. So, can enough realize preheating the purpose of pure water, be of value to improving water supply flow, utilize heater 18 to preheat the pure water moreover to utilize pure water tank 15 to save the water after preheating, the structure is comparatively simple, is of value to the manufacturing cost who reduces the purifier.
In some embodiments, the water purifier further comprises a second temperature sensor connected to the controller, the second temperature sensor being configured to detect an outlet water temperature of the heater 18; the controller is specifically configured to:
when a water taking command is received, adjusting the reversing valve 17 to communicate the second water pump 16 and the heater 18;
the second water pump 16 and the heater 18 are started, and the pure water preheated in the pure water tank 15 is conveyed to the heater 18 through the second water pump 16 for heating;
and when the outlet water temperature of the heater 18 reaches a second temperature threshold value, the second water valve 19 is opened to supply water.
Alternatively, the second water valve 19 may be connected to the heater 18 via a return line 22, and the second temperature sensor may be provided on the return line 22. When the controller receives a water taking instruction, the reversing valve 17 is adjusted to communicate the second water pump 16 and the heater 18, the second water pump 16 and the heater 18 are started, and the preheated pure water is conveyed to the heater 18 through the second water pump 16 to be heated. However, the controller does not immediately open the second water valve 19 to supply water to the user, but opens the second water valve 19 to supply water to the user when the controller receives the second temperature signal of the second temperature sensor and determines that the leaving water temperature of the heater 18 reaches the second temperature threshold, so that the supply water temperature can be accurately controlled. The second temperature threshold may be a fixed temperature value or a temperature value selected by a user through an operation component.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.

Claims (10)

1. A control method is used for controlling a water purifier, and is characterized by comprising the following steps:
detecting the liquid level of a pure water tank for storing pure water;
when the liquid level of the pure water tank is lower than a first liquid level threshold value, conveying raw water stored in a raw water tank to a filter element for pure water preparation, and conveying the prepared pure water to a pure water tank;
and when the liquid level of the pure water tank reaches a second liquid level threshold value, stopping pure water preparation, conveying the pure water in the pure water tank to the filter element by using a cleaning pipeline so as to clean the filter element, and discharging the cleaning water of the filter element to the raw water tank by using a waste water pipeline.
2. The control method according to claim 1, characterized in that the method further comprises:
and when the water purifier is in a standby state and reaches a first time threshold value, discharging the pure water stored in the pure water tank to the filter element by using the cleaning pipeline, and discharging the pure water to the raw water tank through the waste water pipeline.
3. The control method according to claim 1, wherein the raw water tank is connected to the filter element by a first water pump; the raw water stored in the raw water tank is conveyed to the filter element for pure water preparation, and the prepared pure water is conveyed to the pure water tank, and the method comprises the following steps:
and the raw water stored in the raw water tank is conveyed to the filter element through the first water pump to prepare pure water, and the prepared pure water is conveyed to the pure water tank.
4. The control method according to claim 3, wherein the water purifier further comprises a reversing valve and a second water pump connected between the water outlet of the pure water tank and the reversing valve, and the cleaning pipeline is respectively connected with the reversing valve and the first water pump;
the pure water in the pure water tank is conveyed to the filter element by using a cleaning pipeline so as to wash the filter element, and the pure water cleaning device comprises:
adjusting the reversing valve to communicate the first water pump and the second water pump with the cleaning pipeline through the reversing valve;
and the pure water in the pure water tank is conveyed to the filter element through the first water pump and the second water pump, and the filter element is flushed by the pure water.
5. A control method according to claim 4, wherein a first water valve is provided on the waste water line; the discharging of the washing water of the filter cartridge to the raw water tank using the waste water line includes:
opening the first water valve to communicate the filter element and the raw water tank through the waste water pipeline;
and conveying the flushing water of the filter element to the raw water tank through the waste water pipeline.
6. A water purifier is characterized by comprising a raw water tank, a first water pump, a filter element, a pure water tank, a second water pump, a reversing valve, a first water valve, a first liquid level sensor and a controller, wherein the raw water tank, the first water pump, the filter element, the pure water tank, the second water pump and the reversing valve are sequentially connected, the reversing valve is connected with a water inlet of the first water pump through a cleaning pipeline, a wastewater outlet of the filter element is connected with the raw water tank through a wastewater pipeline, the first water valve is arranged on the wastewater pipeline, and the controller is respectively connected with the first water pump, the second water pump, the reversing valve, the first water valve and the first liquid level sensor;
the first liquid level sensor is used for detecting the liquid level of the pure water tank;
the controller is configured to:
when the liquid level of the pure water tank is lower than a first liquid level threshold value, driving the first water pump to convey raw water stored in the raw water tank to the filter element for pure water preparation, and conveying the prepared pure water to the pure water tank;
when the liquid level of pure water case reaches the second liquid level threshold value, adjust the switching-over valve, through wash the pipeline intercommunication the second water pump with first water pump orders about first water pump with second water pump will pure water in the pure water case is carried extremely the filter core, right the filter core is washed, opens first water valve, through waste water pipeline intercommunication the filter core with former water tank stops the pure water preparation, through waste water pipeline will the sparge water of filter core discharges extremely former water tank.
7. The water purifier of claim 6, wherein the controller is further configured to:
when the water purifier is in a standby state and reaches a first time threshold value, the reversing valve is adjusted, the cleaning pipeline is communicated with the second water pump and the first water pump, the first water valve is opened, the waste water pipeline is communicated with the filter element and the raw water tank, the first water pump and the second water pump are opened, pure water stored in the pure water tank is discharged to the filter element through the cleaning pipeline, and pure water is discharged to the raw water tank through the waste water pipeline.
8. The water purifier of claim 6, further comprising a heater and a second water valve, the heater connected between the diverter valve and the second water valve, the heater and the second water valve both connected to the controller;
the controller is further configured to:
when a water taking instruction is received, the reversing valve is adjusted to communicate the second water pump and the heater, the second water pump, the heater and the second water valve are started, pure water in the pure water tank is conveyed to the heater through the second water pump to be heated, and water is supplied through the second water valve.
9. The water purifier of claim 8, wherein the water outlet of the heater is further connected to the purified water tank via a return line; the water purifier also comprises a first temperature sensor connected with the controller, and the first temperature sensor is used for detecting the water temperature of the pure water in the pure water tank;
the controller is further configured to:
when the temperature of the pure water in the pure water tank is lower than a first temperature threshold value, adjusting the reversing valve to communicate the second water pump with the heater;
and starting the second water pump and the heater, conveying the pure water in the pure water tank to the heater through the second water pump for preheating, and refluxing the preheated pure water into the pure water tank through a reflux pipeline.
10. The water purifier of claim 9, further comprising a second temperature sensor connected to the controller, the second temperature sensor configured to detect an outlet water temperature of the heater; the controller is specifically configured to:
when a water taking instruction is received, adjusting the reversing valve to communicate the second water pump with the heater;
starting the second water pump and the heater, and conveying the preheated pure water in the pure water tank to the heater through the second water pump for heating;
and when the water outlet temperature of the heater reaches a second temperature threshold value, the second water valve is opened to supply water.
CN202111355935.8A 2021-11-16 2021-11-16 Control method and water purifier Pending CN114084919A (en)

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CN210103585U (en) * 2019-04-16 2020-02-21 浙江沁园水处理科技有限公司 Kitchen following formula water purifier of function is promptly heated from area
CN211445382U (en) * 2019-10-09 2020-09-08 佛山市云米电器科技有限公司 Reverse osmosis water purification system with heating function and water purifier thereof
CN112142214A (en) * 2020-10-10 2020-12-29 上海纯米电子科技有限公司 Water purifier and control method and device thereof
CN112441668A (en) * 2019-09-02 2021-03-05 珠海格力电器股份有限公司 Water treatment system and water purification unit
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* Cited by examiner, † Cited by third party
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CN106395991A (en) * 2016-10-28 2017-02-15 宁波福特恩净水设备有限公司 Water purifying and dispensing machine and water purifying method capable of avoiding TDS standard exceeding of water storage tank thereof
CN209113599U (en) * 2018-05-30 2019-07-16 郑州跃龙电子科技有限公司 The water purifier of reverse osmosis membrane is rinsed in a kind of low pressure water purification suitable for low pressure water source
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